WO2012043473A1 - Curable composition for inkjet applications, and process for manufacturing electronic component - Google Patents

Curable composition for inkjet applications, and process for manufacturing electronic component Download PDF

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Publication number
WO2012043473A1
WO2012043473A1 PCT/JP2011/071883 JP2011071883W WO2012043473A1 WO 2012043473 A1 WO2012043473 A1 WO 2012043473A1 JP 2011071883 W JP2011071883 W JP 2011071883W WO 2012043473 A1 WO2012043473 A1 WO 2012043473A1
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WO
WIPO (PCT)
Prior art keywords
curable composition
inkjet
compound
meth
containing compound
Prior art date
Application number
PCT/JP2011/071883
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French (fr)
Japanese (ja)
Inventor
上田　倫久
貴志 渡邉
秀 中村
崇至 鹿毛
駿夫 ▲高▼橋
孝徳 井上
Original Assignee
積水化学工業株式会社
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Application filed by 積水化学工業株式会社 filed Critical 積水化学工業株式会社
Priority to JP2011541005A priority Critical patent/JP6066559B2/en
Publication of WO2012043473A1 publication Critical patent/WO2012043473A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0045—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or film forming compositions cured by mechanical wave energy, e.g. ultrasonics, cured by electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams, or cured by magnetic or electric fields, e.g. electric discharge, plasma
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/101—Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/30—Inkjet printing inks
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/22—Secondary treatment of printed circuits
    • H05K3/28—Applying non-metallic protective coatings
    • H05K3/285—Permanent coating compositions
    • H05K3/287—Photosensitive compositions
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/01—Tools for processing; Objects used during processing
    • H05K2203/0104—Tools for processing; Objects used during processing for patterning or coating
    • H05K2203/013—Inkjet printing, e.g. for printing insulating material or resist

Definitions

  • the present invention relates to an ink-jet curable composition applied by an ink-jet method, an ink-jet curable composition suitably used for forming a cured layer such as a resist pattern on a substrate, and the ink-jet curing.
  • the present invention relates to a method for manufacturing an electronic component having a cured product layer formed of a conductive composition.
  • solder resist pattern which is a patterned solder resist film
  • substrate on which wiring is provided on the upper surface
  • solder resist pattern which is a patterned solder resist film
  • solder resist pattern As a method for forming a fine solder resist pattern, a method of applying a solder resist composition by an ink jet method has been proposed.
  • the number of steps is smaller than in the case of forming a solder resist pattern by a screen printing method. For this reason, the solder resist pattern can be easily and efficiently formed by the inkjet method.
  • Patent Document 1 discloses inkjet curing comprising a monomer having a (meth) acryloyl group and a thermosetting functional group, a photoreactive diluent having a weight average molecular weight of 700 or less, and a photopolymerization initiator.
  • a sex composition is disclosed.
  • the viscosity of the curable composition for inkjet at 25 ° C. is 150 mPa ⁇ s or less.
  • the viscosity of the curable composition for inkjet described in Patent Document 1 is relatively low. For this reason, the curable composition for inkjet described in Patent Document 1 can be coated on a substrate by an inkjet method.
  • the curable composition for inkjet described in Patent Document 1 has a problem that the heat resistance of the cured product after curing is lowered. For this reason, when a solder resist pattern is formed on a substrate using the curable composition for inkjet described in Patent Document 1 and a printed wiring board is obtained, the heat resistance of the solder resist pattern is low. Can not be used for a long time, or the reliability of the printed wiring board is low.
  • solder resist pattern using the curable composition for inkjet described in Patent Document 1 the photocured photocured component and the heat cured thermoset component may be separated. For this reason, there exists a problem that a soldering resist pattern becomes non-uniform
  • An object of the present invention is a curable composition applied by an inkjet method, which can improve the uniformity of a cured film after curing and can improve the heat resistance of the cured product. It is providing the manufacturing method of an electronic component using the curable composition and this curable composition for inkjet.
  • a curable composition for inkjet which is applied by an inkjet method and is cured by irradiation with light and application of heat, which has a (meth) acryloyl group and is aromatic.
  • a (meth) acryloyl group-containing compound having an alicyclic skeleton having a skeleton or containing an unsaturated double bond in the alicyclic skeleton, and having two or more cyclic ether groups and an aromatic skeleton there is provided a curable composition for inkjet, comprising a cyclic ether group-containing compound, a photoreactive compound other than the (meth) acryloyl group-containing compound, a photopolymerization initiator, and a latent curing agent.
  • the viscosity at 25 ° C. measured in accordance with JIS K2283 is preferably 100 mPa ⁇ s or more and 1200 mPa ⁇ s or less.
  • the (meth) acryloyl group-containing compound in the total (100% by weight) of the (meth) acryloyl group-containing compound, the cyclic ether group-containing compound, and the photoreactive compound, the (meth) The content of the acryloyl group-containing compound is 10% by weight or more.
  • the latent curing agent is dicyandiamide particles, or dicyandiamide and a functional group-containing compound having a functional group capable of reacting with the dicyandiamide This is a reaction viscous product.
  • the latent curing agent is preferably a reaction viscous product obtained by reacting dicyandiamide with a functional group-containing compound having a functional group capable of reacting with the dicyandiamide.
  • the photopolymerization initiator is preferably an ⁇ -aminoalkylphenone type photoradical polymerization initiator.
  • the photopolymerization initiator is more preferably an ⁇ -aminoalkylphenone type photoradical polymerization initiator having a dimethylamino group.
  • the photoreactive substance includes a polyfunctional compound having a polycyclic skeleton and having two or more (meth) acryloyl groups.
  • the photoreactive compound includes a monofunctional compound having a polycyclic skeleton and having one (meth) acryloyl group.
  • the photoreactive compound includes a polyfunctional compound having a polycyclic skeleton and having two or more (meth) acryloyl groups; Both include a monofunctional compound having a skeleton and one (meth) acryloyl group.
  • coating the inkjet curable composition comprised according to this invention by the inkjet system, and drawing it in a pattern form, and the said inkjet use drawn in the pattern form There is provided a method for producing an electronic component, comprising: irradiating light and applying heat to the curable composition and curing the composition to form a cured product layer.
  • the method is a method for manufacturing a printed wiring board that is an electronic component having a resist pattern, and the inkjet curable composition is applied by an inkjet method, A resist pattern is formed by drawing in a pattern, applying light and applying heat to the curable composition for inkjet drawn in a pattern, and curing the composition.
  • the inkjet curable composition according to the present invention has a (meth) acryloyl group and an aromatic skeleton or an alicyclic skeleton containing an unsaturated double bond in the alicyclic skeleton ( A meth) acryloyl group-containing compound, a cyclic ether group-containing compound having two or more cyclic ether groups and an aromatic skeleton, a photoreactive compound, a photopolymerization initiator, and a latent curing agent. Therefore, it hardens
  • the curable composition for inkjet according to the present invention includes a (meth) acryloyl group-containing compound (A), a cyclic ether group-containing compound (B), a photoreactive compound (C), and a photopolymerization initiator (D). And a latent curing agent (E).
  • the (meth) acryloyl group-containing compound (A) has a (meth) acryloyl group and has an aromatic skeleton or an alicyclic skeleton containing an unsaturated double bond in the alicyclic skeleton.
  • the cyclic ether group-containing compound (B) has two or more cyclic ether groups and an aromatic skeleton.
  • the photoreactive compound (C) is a photoreactive compound other than the (meth) acryloyl group-containing compound (A).
  • the term “(meth) acryloyl group” refers to an acryloyl group and a methacryloyl group.
  • the curable composition for inkjet according to the present invention contains a (meth) acryloyl group-containing compound (A), a photoreactive compound (C), and a photopolymerization initiator (D), it can be cured by light irradiation. is there. Since the curable composition for inkjet according to the present invention contains the cyclic ether group-containing compound (B) and the latent curing agent (E), it can be cured by application of heat. Therefore, the curable composition for inkjet according to the present invention is curable by light irradiation and application of heat, and is an inkjet light and thermosetting composition.
  • the primary cured product is subjected to main curing by applying heat to obtain a cured product layer such as a resist pattern.
  • a cured product layer such as a resist pattern
  • the curable composition for inkjet according to the present invention has a specific composition including the components (A) to (E), and in particular, the (meth) acryloyl group-containing compound (A) has an aromatic skeleton or Since it has an alicyclic skeleton containing an unsaturated double bond in the alicyclic skeleton and the cyclic ether group-containing compound (B) has an aromatic skeleton, the heat resistance of the cured product can be increased. Therefore, the electronic component using the curable composition for inkjet according to the present invention can be used for a long period of time, and the reliability of the electronic component can be improved. Moreover, the printed wiring board using the curable composition for inkjet according to the present invention can be used for a long period of time, and the reliability of the printed wiring board can be improved.
  • the curable composition for inkjet according to the present invention has a specific composition including the components (A) to (E), and in particular, the (meth) acryloyl group-containing compound (A) has an aromatic skeleton or Since it has an alicyclic skeleton containing an unsaturated double bond in the alicyclic skeleton and the cyclic ether group-containing compound (B) has an aromatic skeleton, the uniformity of the cured film after curing is improved.
  • a cured product layer such as a uniform resist pattern is obtained by coating a curable composition for inkjet on an application target member by an inkjet method, and curing the composition by light irradiation and application of heat. be able to. Specifically, for example, separation between a photocured photocured component and a heat cured thermoset component can be suppressed, and unevenness can be made difficult to occur in a cured product film such as a resist pattern.
  • the (meth) acryloyl group-containing compound (A) has a (meth) acryloyl group and has an aromatic skeleton or an alicyclic skeleton containing an unsaturated double bond in the alicyclic skeleton. Since the (meth) acryloyl group-containing compound (A) has a (meth) acryloyl group, polymerization proceeds and is cured by irradiation with light. For this reason, curing can be advanced by irradiating light after coating the curable composition, the applied shape can be maintained, and primary curing of the curable composition irradiated with light. It can suppress effectively that a thing and hardened
  • the (meth) acryloyl group-containing compound (A) As the (meth) acryloyl group-containing compound (A), a compound (A1) having a (meth) acryloyl group and having an aromatic skeleton, a (meth) acryloyl group and an unsaturated double bond Any of the compounds (A2) having an alicyclic skeleton contained in the cyclic skeleton can be used.
  • Examples of the monofunctional compound having one (meth) acryloyl group in the compound (A1) include benzyl (meth) acrylate, phenoxyethyl (meth) acrylate, and alkoxylated phenyl (meth) acrylate.
  • epoxy (meth) acrylates obtained by adding (meth) acrylic acid to a bisphenol type epoxy compound or the like
  • aromatic urethane (meth) Examples include acrylates, aromatic polyester (meth) acrylates, ethoxylated bisphenol A type di (meth) acrylates, and propoxylated bisphenol A type di (meth) acrylates.
  • the compound (A2) include dicyclopentenyl (meth) acrylate and dicyclopentenyloxyethyl (meth) acrylate.
  • the amount of the (meth) acryloyl group-containing compound (A) is appropriately adjusted so as to be appropriately cured by light irradiation and heat application, and is not particularly limited.
  • the content of the (meth) acryloyl group-containing compound (A) is 10% by weight or more in 100% by weight of the curable composition for inkjet. It is preferable that it is 80 weight% or less.
  • the upper limit of the content of the (meth) acryloyl group-containing compound (A) is appropriately adjusted depending on the contents of the components (B) to (E) and other components.
  • the content of the (meth) acryloyl group-containing compound (A) in a total of 100% by weight of the (meth) acryloyl group-containing compound (A), the cyclic ether group-containing compound (B), and the photoreactive compound (C). Is preferably 10% by weight or more. In this case, the heat resistance of the cured product and the uniformity of the cured product film are further enhanced.
  • the cyclic ether group-containing compound (B) has two or more cyclic ether groups and an aromatic skeleton. Since the curable composition for inkjet according to the present invention contains the cyclic ether group-containing compound (B), it can be cured by application of heat. By using the cyclic ether group-containing compound (B), the curable composition for inkjet is primarily cured by light irradiation to obtain a primary cured product, and then the primary cured product is cured more efficiently by applying heat. be able to.
  • cyclic ether group containing compound (B) By using cyclic ether group containing compound (B), a resist pattern can be formed efficiently and accurately, and also the heat resistance and insulation reliability of hardened material can be improved.
  • a cyclic ether group containing compound (B) only 1 type may be used and 2 or more types may be used together.
  • the cyclic ether group-containing compound (B) has an aromatic skeleton.
  • the aromatic skeleton include benzene ring skeleton, naphthalene ring skeleton, anthracene ring skeleton, phenanthrene ring skeleton, tetracene ring skeleton, chrysene ring skeleton, triphenylene ring skeleton, tetraphen ring skeleton, pyrene ring skeleton, pentacene ring skeleton, and picene ring.
  • Examples include a skeleton and a perylene ring skeleton.
  • the aromatic skeleton is preferably a benzene ring skeleton, a naphthalene ring skeleton or an anthracene ring skeleton.
  • Examples of the cyclic ether group in the cyclic ether group-containing compound (B) include an epoxy group and an oxetanyl group.
  • the cyclic ether group is preferably an epoxy group from the viewpoint of enhancing the thermosetting property and obtaining a cured product that is more excellent in heat resistance.
  • compounds having an epoxy group include heterocyclic epoxy compounds such as bisphenol S type epoxy compounds, diglycidyl phthalate compounds, triglycidyl isocyanurate, bixylenol type epoxy compounds, biphenol type epoxy compounds, tetraglycidyl xylenoyl Ethane compound, bisphenol A type epoxy compound, hydrogenated bisphenol A type epoxy compound, bisphenol F type epoxy compound, bisphenol AD type epoxy compound, brominated bisphenol A type epoxy compound, phenol novolac type epoxy compound, cresol novolac type epoxy compound, fat Cyclic epoxy compounds, bisphenol A novolac type epoxy compounds, chelate type epoxy compounds, glyoxal type epoxy compounds, containing amino groups Epoxy compounds, rubber-modified epoxy compound, dicyclopentadiene phenolic type epoxy compounds, silicone-modified epoxy compounds and ⁇ - caprolactone-modified epoxy compounds and the like.
  • an epoxy compound having an aromatic skeleton is
  • the curable composition for inkjet according to the present invention uses a compound having an oxetanyl group having an aromatic skeleton.
  • the cyclic ether group-containing compound (B) has an aromatic skeleton.
  • the thermal stability during storage and ejection of the curable composition is further improved, and gelation is less likely to occur during storage of the curable composition.
  • the compound having an aromatic skeleton and a cyclic ether group has a (meth) acryloyl group-containing compound (A) and a photoreactive compound (C) as compared with a compound having no aromatic skeleton and having a cyclic ether group.
  • the compatibility with the latent curing agent (E) is excellent, the insulation reliability is further improved.
  • the cyclic ether group-containing compound (B) is preferably liquid at 25 ° C.
  • the viscosity at 25 ° C. of the cyclic ether group-containing compound (B) preferably exceeds 300 mPa ⁇ s.
  • the viscosity at 25 ° C. of the cyclic ether group-containing compound (B) is preferably 150 Pa ⁇ s or less, and more preferably 80 Pa ⁇ s or less.
  • the viscosity of the cyclic ether group-containing compound (B) is not more than the above upper limit, the dischargeability of the curable composition is further improved, and the compatibility between the cyclic ether group-containing compound (B) and other components is improved. This further increases the insulation reliability.
  • the amount of the cyclic ether group-containing compound (B) is appropriately adjusted so as to be appropriately cured by application of heat, and is not particularly limited.
  • the content of the cyclic ether group-containing compound (B) is preferably 3% by weight or more and 60% by weight or less.
  • the content of the cyclic ether group-containing compound (B) is more preferably 5% by weight or more, and more preferably 50% by weight or less.
  • the content of the cyclic ether group-containing compound (B) is not more than the above upper limit, the heat resistance of the cured product is further increased, and the ink-jet curable composition applied by the ink-jet method is further spread out. Can be suppressed.
  • the photoreactive compound (C) is a photoreactive compound other than the (meth) acryloyl group-containing compound (A).
  • the photoreactive compound (C) preferably does not have an aromatic skeleton and does not have an alicyclic skeleton containing an unsaturated double bond in the alicyclic skeleton.
  • a photoreactive compound (C) only 1 type may be used and 2 or more types may be used together.
  • Examples of the photoreactive compound (C) include polyfunctional compounds having two or more (meth) acryloyl groups and monofunctional compounds having one (meth) acryloyl group.
  • polyfunctional compound examples include (meth) acrylic acid adducts of polyhydric alcohols, (meth) acrylic acid adducts of alkylene oxide modified polyhydric alcohols, urethane (meth) acrylates, and polyester (meth) acrylates.
  • Etc. examples of the polyhydric alcohol include diethylene glycol, triethylene glycol, polyethylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, trimethylolpropane, cyclohexanedimethanol, tricyclodecane dimethanol, and pentaerythritol.
  • polyfunctional compound in the photoreactive compound (C) include triethylene glycol di (meth) acrylate and tricyclodecane dimethanol di (meth) acrylate.
  • monofunctional compounds in the photoreactive compound (C) include isobornyl (meth) acrylate and cyclopentanyl (meth) acrylate.
  • the photoreactive compound (C) preferably includes a compound (C1) having a polycyclic skeleton and having a (meth) acryloyl group.
  • the use of the compound (C1) can increase the heat and moisture resistance of the cured product of the curable composition for inkjet. Therefore, an electronic component such as a printed wiring board using the curable composition for inkjet according to the present invention can be used for a long period of time, and the reliability of the electronic component can be increased.
  • the compound (C1) is preferably a polyfunctional compound (C1-1) having a polycyclic skeleton and having two or more (meth) acryloyl groups. Accordingly, the photoreactive compound (C) preferably includes a polyfunctional compound (C1-1) having a polycyclic skeleton and having two or more (meth) acryloyl groups.
  • the compound (C1) is preferably a monofunctional compound (C1-2) having a polycyclic skeleton and having one (meth) acryloyl group.
  • the photoreactive compound (C) preferably includes a monofunctional compound (C1-2) having a polycyclic skeleton and having one (meth) acryloyl group.
  • a polyfunctional compound (C1-1) having a polycyclic skeleton and having two or more (meth) acryloyl groups is preferable.
  • the photoreactive compound (C) includes a polyfunctional compound (C1-1) having a polycyclic skeleton and having two or more (meth) acryloyl groups, a polycyclic skeleton, and (meth) More preferably, it includes both a monofunctional compound (C1-2) having one acryloyl group.
  • a polyfunctional compound (C1-1) having a polycyclic skeleton and having two or more (meth) acryloyl groups, a polycyclic skeleton, and (meth) More preferably, it includes both a monofunctional compound (C1-2) having one acryloyl group.
  • the heat-and-moisture resistance of the cured product of the ink-jet curable composition is considerably increased. Therefore, an electronic component such as a printed wiring board using the curable composition for inkjet according to the present invention can be used for a longer period of time, and the reliability of the electronic component is further enhanced.
  • the use of the monofunctional compound (C1-2) not only increases the heat and moisture resistance of the cured product, but also increases the dischargeability of the curable composition.
  • the polyfunctional skeleton has no (meth) acryloyl group.
  • cured material becomes high.
  • the polyfunctional compound (C1-1) is not particularly limited as long as it has a polycyclic skeleton and two or more (meth) acryloyl groups.
  • the polyfunctional compound (C1-1) a conventionally known polyfunctional compound having a polycyclic skeleton and having two or more (meth) acryloyl groups can be used. Since the polyfunctional compound (C1-1) has two or more (meth) acryloyl groups, polymerization proceeds and cures upon irradiation with light.
  • the polyfunctional compound (C1-1) only one type may be used, or two or more types may be used in combination.
  • Examples of the polyfunctional compound (C1-1) include (meth) acrylic acid adducts of polyhydric alcohols, (meth) acrylic acid adducts of alkylene oxide-modified polyhydric alcohols, urethane (meth) acrylates, and polyesters ( And (meth) acrylates.
  • Examples of the polyhydric alcohol include diethylene glycol, triethylene glycol, polyethylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, trimethylolpropane, and pentaerythritol.
  • the polyfunctional compound (C1-1) examples include tricyclodecane dimethanol di (meth) acrylate and isobornyl dimethanol di (meth) acrylate.
  • the polyfunctional compound (C1-1) is preferably tricyclodecane dimethanol di (meth) acrylate.
  • (meth) acrylate refers to acrylate and methacrylate.
  • the monofunctional compound (C1-2) is not particularly limited as long as it has a polycyclic skeleton and one (meth) acryloyl group.
  • a conventionally known monofunctional compound having a polycyclic skeleton and having one (meth) acryloyl group can be used.
  • the monofunctional compound (C1-2) only one type may be used, or two or more types may be used in combination.
  • the monofunctional compound (C1-2) examples include isobornyl (meth) acrylate, dihydroxycyclopentadienyl (meth) acrylate, and dicyclopentanyl (meth) acrylate.
  • the monofunctional compound (C1-2) is composed of isobornyl (meth) acrylate, dihydroxycyclopentadienyl (meth) acrylate, and dicyclopentanyl (meth). It is preferably at least one selected from the group consisting of acrylates.
  • the “polycyclic skeleton” in the compound (C1) represents a structure having a plurality of cyclic skeletons continuously.
  • Examples of the polycyclic skeleton in the compound (C1) include a polycyclic alicyclic skeleton.
  • polycyclic alicyclic skeleton examples include a bicycloalkane skeleton, a tricycloalkane skeleton, a tetracycloalkane skeleton, and an isobornyl skeleton.
  • the blending amount of the photoreactive compound (C) is appropriately adjusted so as to be appropriately cured by light irradiation, and is not particularly limited.
  • the content of the photoreactive compound (C) is preferably 3% by weight or more and 80% by weight or less.
  • the content of the photoreactive compound (C) is more preferably 5% by weight or more, and more preferably 70% by weight or less.
  • the curable composition can be more effectively cured by light irradiation. If the content of the photoreactive compound (C) is not less than the above upper limit, unevenness may occur during thermosetting.
  • the content of the compound (C1) is preferably 5% by weight or more, more preferably 10% by weight or more, further preferably 20% by weight or more, preferably 80% by weight or less, More preferably, it is 70 weight% or less, More preferably, it is 60 weight% or less.
  • Each content of the compound (C1-1) and the compound (C1-2) in 100% by weight of the curable composition for inkjet is preferably 5% by weight or more, more preferably 10% by weight or more, and further preferably 20% by weight.
  • the moisture and heat resistance of the cured product is further enhanced.
  • the curable composition can be effectively cured by irradiation with light and application of heat. it can.
  • the curable composition for inkjet according to the present invention includes a photopolymerization initiator (D).
  • the photopolymerization initiator (D) include a radical photopolymerization initiator and a cationic photopolymerization initiator.
  • the photopolymerization initiator (D) is preferably a photoradical polymerization initiator.
  • a photoinitiator (D) only 1 type may be used and 2 or more types may be used together.
  • the photo radical polymerization initiator is not particularly limited.
  • the photo radical polymerization initiator is a compound for generating radicals upon light irradiation and initiating a radical polymerization reaction.
  • Specific examples of the photo radical polymerization initiator include, for example, benzoin, benzoin alkyl ethers, acetophenones, aminoacetophenones, anthraquinones, thioxanthones, ketals, 2,4,5-triarylimidazole dimer, Examples include riboflavin tetrabutyrate, thiol compounds, 2,4,6-tris-s-triazine, organic halogen compounds, benzophenones, xanthones, and 2,4,6-trimethylbenzoyldiphenylphosphine oxide.
  • the said radical photopolymerization initiator only 1 type may be used and 2 or more types may be used together.
  • benzoin alkyl ethers examples include benzoin methyl ether, benzoin ethyl ether, and benzoin isopropyl ether.
  • acetophenones examples include acetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, 1,1-dichloroacetophenone, and the like.
  • aminoacetophenones examples include 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butane
  • examples include -1-one and N, N-dimethylaminoacetophene.
  • examples of the anthraquinones include 2-methylanthraquinone, 2-ethylanthraquinone, 2-t-butylanthraquinone and 1-chloroanthraquinone.
  • Examples of the thioxanthones include 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, 2-chlorothioxanthone, and 2,4-diisopropylthioxanthone.
  • Examples of the ketals include acetophenone dimethyl ketal and benzyl dimethyl ketal.
  • Examples of the thiol compound include 2-mercaptobenzoimidazole, 2-mercaptobenzoxazole and 2-mercaptobenzothiazole.
  • Examples of the organic halogen compound include 2,2,2-tribromoethanol and tribromomethylphenyl sulfone.
  • Examples of the benzophenones include benzophenone and 4,4'-bisdiethylaminobenzophenone.
  • the photo radical polymerization initiator is preferably an ⁇ -aminoalkylphenone type photo radical polymerization initiator, and more preferably an ⁇ -aminoalkyl phenone type photo radical polymerization initiator having a dimethylamino group.
  • the thermosetting speed can be increased, and the thermosetting property of the light irradiated product of the composition can be increased. Can be improved.
  • the present inventors can not only improve the photocurability but also improve the thermosetting property by using an ⁇ -aminoalkylphenone type photoradical polymerization initiator having a dimethylamino group. I found.
  • the ⁇ -aminoalkylphenone type photoradical polymerization initiator having a dimethylamino group is a component that greatly contributes to improvement of thermosetting.
  • the heat resistance and insulation reliability of the cured product can be enhanced. Even if an electronic component such as a printed wiring board having a resist pattern formed by the curable composition for inkjet according to the present invention is used for a long time under a high humidity condition, the insulation resistance is excellent. Is kept high enough.
  • ⁇ -aminoalkylphenone type photo radical polymerization initiator examples include IRGACURE907, IRGACURE369, IRGACURE379, and IRGACURE379EG manufactured by BASF.
  • Other ⁇ -aminoalkylphenone type photopolymerization initiators may be used.
  • 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone examples of the ⁇ -aminoalkylphenone type photo radical polymerization initiator.
  • a photopolymerization initiation assistant may be used together with the photoradical polymerization initiator.
  • the photopolymerization initiation assistant include N, N-dimethylaminobenzoic acid ethyl ester, N, N-dimethylaminobenzoic acid isoamyl ester, pentyl-4-dimethylaminobenzoate, triethylamine, and triethanolamine.
  • Photopolymerization initiation assistants other than these may be used.
  • the said photoinitiation adjuvant only 1 type may be used and 2 or more types may be used together.
  • a titanocene compound such as CGI-784 (manufactured by Ciba Specialty Chemicals) having absorption in the visible light region may be used to promote the photoreaction.
  • the photocationic polymerization initiator is not particularly limited, and examples thereof include sulfonium salts, iodonium salts, metallocene compounds, and benzoin tosylate. As for the said photocationic polymerization initiator, only 1 type may be used and 2 or more types may be used together.
  • the content of the photopolymerization initiator (D) is preferably 0.1 parts by weight or more with respect to a total of 100 parts by weight of the (meth) acryloyl group-containing compound (A) and the photoreactive compound (C).
  • the amount is preferably 1 part by weight or more, more preferably 3 parts by weight or more, preferably 30 parts by weight or less, more preferably 15 parts by weight or less, and still more preferably 10 parts by weight or less.
  • the content of the photopolymerization initiator (D) is not less than the above lower limit and not more than the above upper limit, the curable composition is more effectively cured by light irradiation.
  • the curable composition for inkjet according to the present invention includes a latent curing agent (E).
  • the latent curing agent (E) is not particularly limited.
  • a conventionally known latent curing agent can be used as the latent curing agent (E).
  • latent hardening agent (E) only 1 type may be used and 2 or more types may be used together.
  • the latent curing agent (E) is a latent curing in which triphenylphosphine (thermosetting agent) is coated with a shell formed of dicyandiamide particles, hydrazide compounds, methyl (meth) acrylate resin, styrene resin, or the like.
  • a thermosetting agent such as amine is coated with a shell formed of an agent (for example, “EPCAT-P” and “EPCAT-PS” manufactured by Nippon Kayaku Co., Ltd.), a polyurea polymer or a radical polymer Curing agent (described in Japanese Patent Nos.
  • a latent curing agent obtained by dispersing and curing a thermal curing agent such as modified imidazole in an epoxy resin and pulverizing (Asahi Kasei E-material) "Novacure HXA3792" and “HXA3932HP”), high thermoplasticity A latent curing agent dispersed in and contained therein (described in Japanese Patent No. 3098061), and an imidazole latent curing agent coated with a tetrakisphenol compound (for example, “TEP-2E4MZ manufactured by Nippon Soda Co., Ltd.) And “HIPA-2E4MZ”) and the like. Latent curing agents other than these may be used.
  • the latent curing agent (E) is preferably dicyandiamide from the viewpoint of further reducing the viscosity change when heated and further extending the pot life.
  • the latent curing agent (E) is dicyandiamide particles or can react with the dicyandiamide from the viewpoint of further reducing the viscosity change when heated and further increasing the pot life.
  • a reaction viscous product (E1) obtained by reacting a functional group-containing compound having a functional group is preferable.
  • a preferable example of the reaction viscous product (D) is a reaction product obtained by reacting a cyclic ether group of a compound having a cyclic ether group with a part of active hydrogen of dicyandiamide.
  • the latent curing agent (E) is particularly preferably a reaction viscous product (E1) obtained by reacting dicyandiamide with a functional group-containing compound having a functional group capable of reacting with the dicyandiamide.
  • a reaction viscous material (E1) By using such a reaction viscous material (E1), the insulation reliability by hardened
  • the said reaction viscous material (E1) should just have a viscous property only by the reaction viscous material (E1), before using it for the curable composition for inkjet, In curable composition for inkjets Then it does not have to be viscous. Moreover, when the said reaction viscous material (E1) is taken out from the curable composition for inkjet, this reaction viscous material (E1) may be viscous.
  • dicyandiamide (dicyandiamide particles) that is solid at room temperature (23 ° C.) exists as a solid in the liquid component, it may settle during storage or cause nozzle clogging of the inkjet head.
  • dicyandiamide is reacted in advance with a functional group-containing compound having a functional group capable of reacting with dicyandiamide to prepare a reaction viscous product (E1) and added to the composition. It is preferable.
  • a reaction viscous product (E1) obtained by reacting dicyandiamide and a functional group-containing compound having a functional group capable of reacting with the dicyandiamide is used as a latent curing agent (E ) Is preferably used. If this reaction viscous material (E1) is used, the insulation reliability by the pot life and hardened
  • the reaction viscous product (E1) before blended in the curable composition for inkjet is not blended in an organic solvent or blended in an organic solvent and the reaction viscous product (E1). )
  • the amount of the organic solvent blended with respect to 100 parts by weight is preferably 100 parts by weight or less.
  • blended with respect to 100 weight part of the said reaction viscous material (E1) shall be 50 weight part or less. Is preferably 20 parts by weight or less, more preferably 10 parts by weight or less, and particularly preferably 1 part by weight or less.
  • the reaction viscous product (E1) is preferably a reaction product obtained by reacting the functional group-containing compound with a part of the active hydrogen of dicyandiamide.
  • the functional group capable of reacting with the dicyandiamide of the functional group-containing compound generally reacts with a part of the active hydrogen of dicyandiamide.
  • the dicyandiamide to be reacted with the functional group-containing compound is preferably in a powder form.
  • the powdery dicyandiamide is not powdered and the viscous reaction viscous product (E1) is obtained.
  • the functional group-containing compound reacted with the dicyandiamide is a hydroxyl group, a cyclic ether group, or a carboxyl group. And at least one functional group selected from the group consisting of isocyanate groups.
  • the functional group-containing compound reacted with the dicyandiamide is a compound having a cyclic ether group. It is preferable.
  • the compound having the cyclic ether group to be reacted with dicyandiamide is preferably a compound having one cyclic ether group.
  • the functional group-containing compound reacted with the dicyandiamide is a compound having an epoxy group.
  • the compound having an epoxy group to be reacted with dicyandiamide is preferably a compound having one epoxy group.
  • the functional group-containing compound to be reacted with the dicyandiamide preferably has an aromatic skeleton, more preferably a compound having an aromatic skeleton and a cyclic ether group, and a compound having an aromatic skeleton and an epoxy group. It is particularly preferred.
  • the functional group-containing compound examples include phenyl glycidyl ether, butyl glycidyl ether, ortho-cresyl glycidyl ether, meta-cresyl glycidyl ether, para-cresyl glycidyl ether, allyl glycidyl ether, para-t-butylphenyl glycidyl ether, etc.
  • Examples thereof include glycidyl ethers, glycidyl (meth) acrylate, and 3,4-epoxycyclohexylmethyl (meth) acrylate.
  • the functional group-containing compound is an aromatic ring-containing phenyl glycidyl ether, ortho-cresyl glycidyl ether, meta-cresyl glycidyl ether, para-cresyl glycidyl ether, or para-t-butyl. Preference is given to phenylglycidyl ether.
  • the functional group-containing compound is preferably 0.2 mol or more, more preferably 1 mol or more, preferably 4 mol or less, more preferably 3 mol per mol of dicyandiamide. It is desirable to make it react below mol. That is, the reaction viscous product (E1) is preferably 0.2 mol or more, more preferably 1 mol or more, preferably 4 mol or less, more preferably 1 mol or more of the functional group-containing compound with respect to 1 mol of the dicyandiamide. It is desirable that it is a reaction viscous product obtained by reacting 3 mol or less.
  • reaction viscous product (E1) was reacted with 1 to 3 mol of the functional group-containing compound with respect to 1 mol of the dicyandiamide.
  • a reaction viscous product is particularly desirable. There exists a possibility that unreacted dicyandiamide may precipitate that the usage-amount of the said functional group containing compound is less than the said minimum. When the usage-amount of the said functional group containing compound exceeds the said upper limit, there exists a possibility that all the active hydrogens of the said reaction viscous substance may deactivate, and it becomes impossible to harden a cyclic ether group containing compound (B). In addition, in this reaction, it is preferable to make it react at 60 to 140 degreeC in presence of a solvent or a reaction accelerator as needed.
  • a solvent may be used to dissolve the dicyandiamide.
  • the solvent may be any solvent that can dissolve dicyandiamide.
  • Usable solvents include acetone, methyl ethyl ketone, dimethylformamide, methyl cellosolve and the like.
  • reaction accelerator In order to promote the reaction between the dicyandiamide and the functional group-containing compound, a reaction accelerator may be used.
  • Known reaction accelerators such as phenols, amines, imidazoles, and triphenylphosphine can be used as the reaction accelerator.
  • the reaction viscous product (E1) is in phase with the cyclic ether group-containing compound (B). It is preferably dissolved, preferably compatible with the (meth) acryloyl group-containing compound (A), preferably compatible with the photoreactive compound (C), and further a curable composition. It is preferable that it is dissolved therein.
  • the reaction viscous product (E1) is preferably compatible with the cyclic ether group-containing compound (B), preferably compatible with the (meth) acryloyl group-containing compound (A), and photoreactive. It is preferable that it is compatible with the functional compound (C).
  • the reaction viscous material (E1) is, for example, a non-powdered reaction viscous material obtained by a reaction between powdery dicyandiamide and the functional group-containing compound. From the viewpoint of further improving the inkjet dischargeability, the reaction viscous material (E1) is preferably not a solid, preferably not a crystal, and preferably not a crystalline solid.
  • the reaction viscous product (E1) is preferably liquid or semi-solid.
  • the reaction viscous material (E1) is preferably transparent or translucent. Whether or not the reaction viscous material (E1) is transparent or translucent is whether or not the object is visible when the object is viewed through the reaction viscous material (E1) having a thickness of 5 mm. Can be judged.
  • the compounding ratio of the cyclic ether group-containing compound (B) and the latent curing agent (E) is not particularly limited.
  • the content of the latent curing agent (E) is preferably 1 part by weight or more, more preferably 3 parts by weight or more, preferably 50 parts by weight or less, relative to 100 parts by weight of the cyclic ether group-containing compound (B).
  • the amount is preferably 40 parts by weight or less.
  • the curable composition for inkjet according to the present invention may contain a thermal curing agent other than the latent curing agent (E) together with the latent curing agent (E). Furthermore, the curable composition for inkjet according to the present invention may contain a curing accelerator.
  • thermosetting agent examples include organic acids, amine compounds, amide compounds, hydrazide compounds, imidazole compounds, imidazoline compounds, phenol compounds, urea compounds, polysulfide compounds, and acid anhydrides.
  • a modified polyamine compound such as an amine-epoxy adduct may be used as the thermosetting agent.
  • curing accelerator examples include tertiary amines, imidazoles, quaternary ammonium salts, quaternary phosphonium salts, organometallic salts, phosphorus compounds, urea compounds, and the like.
  • the curable composition for inkjet according to the present invention may contain a solvent, if necessary, for the purpose of adjusting the viscosity.
  • the solvent is preferably a solvent that does not react with the components in the curable composition.
  • a volatile solvent is preferred because it can be removed by drying with heating in an oven or hot plate and reduced pressure in a vacuum chamber before the curing reaction of the curable composition.
  • the curable composition for inkjet according to the present invention may contain an organic solvent as long as the amount is small.
  • various additives may be blended as long as the object of the present invention is not impaired.
  • the additive is not particularly limited, and examples thereof include a colorant, a polymerization inhibitor, an antifoaming agent, a leveling agent, and an adhesion imparting agent.
  • Examples of the colorant include phthalocyanine / blue, phthalocyanine / green, iodin / green, disazo yellow, crystal violet, titanium oxide, carbon black and naphthalene black.
  • Examples of the polymerization inhibitor include hydroquinone, hydroquinone monomethyl ether, tert-butylcatechol, pyrogallol and phenothiazine.
  • Examples of the antifoaming agent include silicone-based antifoaming agents, fluorine-based antifoaming agents, and polymer-based antifoaming agents.
  • Examples of the leveling agent include silicone leveling agents, fluorine leveling agents, and polymer leveling agents.
  • Examples of the adhesion imparting agent include imidazole adhesion imparting agents, thiazole adhesion imparting agents, triazole adhesion imparting agents, and silane coupling agents.
  • the viscosity at 25 ° C. measured in accordance with JIS K2283 is preferably 160 mPa ⁇ s or more and 1200 mPa ⁇ s or less.
  • the viscosity of the curable composition for inkjet is not less than the above lower limit and not more than the above upper limit, the curable composition for inkjet can be easily and accurately discharged from the inkjet head.
  • the curable composition for inkjet is heated to 50 ° C. or higher, the composition can be easily and accurately discharged from the inkjet head.
  • the viscosity is more preferably 1000 mPa ⁇ s or less, and still more preferably 500 mPa ⁇ s or less.
  • the viscosity is preferably more than 500 mPa ⁇ s.
  • the curable composition for inkjet according to the present invention does not contain an organic solvent, or contains an organic solvent, and the content of the organic solvent in 100% by weight of the curable composition is 50% by weight or less. preferable.
  • the content of the organic solvent is more preferably 20% by weight or less, still more preferably 10% by weight or less, and particularly preferably 1% by weight or less. The smaller the content of the organic solvent, the better the resolution when forming the cured product layer.
  • the curable composition for inkjet according to the present invention does not contain an organic solvent or contains an organic solvent, and the content of the organic solvent is 50 parts by weight or less with respect to 100 parts by weight of the reaction viscous material (E1). It is preferable that The content of the organic solvent is more preferably 20 parts by weight or less, still more preferably 10 parts by weight or less, and particularly preferably 1 part by weight or less with respect to 100 parts by weight of the reaction viscous product (E1). The smaller the content of the organic solvent, the better the resolution when forming the cured product layer.
  • the method for producing an electronic component according to the present invention is characterized by using the above-described curable composition for inkjet. That is, in the method for manufacturing an electronic component according to the present invention, first, the curable composition for inkjet is applied by an inkjet method to draw a pattern. At this time, it is particularly preferable to directly draw the curable composition for inkjet. “Direct drawing” means drawing without using a mask.
  • the electronic component include a printed wiring board and a touch panel component.
  • the electronic component is preferably a wiring board, and more preferably a printed wiring board.
  • An inkjet printer is used for coating the curable composition for inkjet.
  • the ink jet printer has an ink jet head.
  • the inkjet head has a nozzle.
  • the ink jet device preferably includes a heating unit for heating the temperature in the ink jet device or the ink jet head to 50 ° C. or higher. It is preferable that the said inkjet curable composition is coated on the coating object member.
  • a substrate etc. are mentioned as said coating object member. Examples of the substrate include a substrate having wirings provided on the upper surface.
  • the inkjet curable composition is preferably applied onto a printed circuit board.
  • a substrate to a member mainly composed of glass and to produce a glass substrate for a display device such as a liquid crystal display device.
  • a conductive pattern such as ITO is provided on glass by a method such as vapor deposition, and a cured product layer is formed on the conductive pattern by an inkjet method by the method for manufacturing an electronic component according to the present invention.
  • a pattern is provided on the cured product layer with a conductive ink or the like, the cured product layer becomes an insulating film, and electrical connection is obtained between predetermined patterns in the conductive pattern on the glass.
  • the cured product layer may be an insulating film or a resist pattern.
  • the insulating film may be a patterned insulating film.
  • the cured product layer is preferably a resist pattern.
  • the resist pattern is preferably a solder resist pattern.
  • the method for manufacturing an electronic component according to the present invention is preferably a method for manufacturing a printed wiring board having a resist pattern.
  • the inkjet curable composition is applied by an inkjet method, drawn in a pattern, and the inkjet curable composition drawn in a pattern is irradiated with light and heat, cured. It is preferable to form a resist pattern.
  • the ink-jet curable composition drawn in a pattern may be primarily cured by irradiation with light to obtain a primary cured product. Thereby, wetting and spreading of the drawn curable composition for inkjet can be suppressed, and a highly accurate resist pattern can be formed.
  • the primary cured product when a primary cured product is obtained by light irradiation, the primary cured product may be subjected to main curing by applying heat to obtain a cured product to form a resist pattern.
  • the curable composition for inkjet according to the present invention can be cured by light irradiation and heat application. When photocuring and thermosetting are used in combination, a resist pattern that is more excellent in heat resistance can be formed.
  • the heating temperature for curing by applying heat is preferably 100 ° C. or higher, more preferably 120 ° C. or higher, preferably 250 ° C. or lower, more preferably 200 ° C. or lower.
  • the light irradiation may be performed after drawing or may be performed simultaneously with drawing.
  • light may be irradiated at the same time as or after the ejection of the curable composition.
  • the light source may be arranged so that the light irradiation portion is positioned at the drawing position by the inkjet head.
  • the light source for irradiating light is appropriately selected according to the irradiating light.
  • the light source include a UV-LED, a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, an ultrahigh-pressure mercury lamp, a xenon lamp, and a metal halide lamp.
  • the irradiated light is generally ultraviolet rays, and may be an electron beam, ⁇ -ray, ⁇ -ray, ⁇ -ray, X-ray, neutron beam, or the like.
  • the temperature at the time of application of the inkjet curable composition is not particularly limited as long as the inkjet curable composition has a viscosity at which the inkjet curable composition can be discharged from the inkjet head.
  • the temperature at the time of application of the curable composition for inkjet is preferably 50 ° C. or higher, more preferably 60 ° C. or higher, and preferably 100 ° C. or lower.
  • the viscosity of the curable composition for inkjet at the time of coating is not particularly limited as long as it can be discharged from the inkjet head.
  • the curable composition for inkjet according to the present invention includes the latent curing agent (E), for example, even when the curable composition for inkjet is heated in an inkjet head, the curable composition for inkjet is used. Pot life is sufficiently long and stable discharge is possible. Furthermore, since the ink-jet curable composition can be heated to a viscosity suitable for coating by the ink-jet method, the use of the ink-jet curable composition according to the present invention suitably produces electronic components such as printed wiring boards. can do.
  • E latent curing agent
  • Irgacure 907 (manufactured by BASF Japan): ⁇ -aminoalkylphenone type photoradical polymerization initiator having no dimethylamino group
  • Irgacure 369 (manufactured by BASF Japan): ⁇ -aminoalkylphenone type photoradical polymerization having dimethylamino group
  • Irgacure 379EG (manufactured by BASF Japan): ⁇ -aminoalkylphenone type photoradical polymerization initiator having a dimethylamino group TPO (manufactured by BASF Japan): acylphosphine oxide type photoradical polymerization initiator Irgacure 184 (BASF Japan) Manufactured by: ⁇ -hydroxyalkylphenone type photo radical polymerization initiator
  • Example 1 25 parts by weight of an epoxy acrylate of a bisphenol A type epoxy compound corresponding to the (meth) acryloyl group-containing compound (A) (“EBECRYL 3700” manufactured by Daicel Cytec) and dicyclopentenyl acrylate (“FA-511AS” manufactured by Hitachi Chemical Co., Ltd.) 30 parts by weight, 15 parts by weight of a bisphenol A type epoxy compound (“jER828” manufactured by Mitsubishi Chemical Corporation) corresponding to the cyclic ether group-containing compound (B), and triethylene glycol diacrylate corresponding to the photoreactive compound (C) 10 parts by weight and 15 parts by weight of isobornyl acrylate, 4 parts by weight of Irgacure 907 ( ⁇ -aminoacetophenone type photo radical polymerization initiator, manufactured by BASF Japan) corresponding to the photopolymerization initiator (D), and latent curing Dicyandiamide corresponding to the agent (E) Cyandiamide particles, median diameter: 3 ⁇ m, 1 part
  • Examples 2 to 30 and Comparative Examples 1 to 3 A curable composition for inkjet was obtained in the same manner as in Example 1 except that the types and blending amounts of the blending components were changed as shown in Tables 1 to 4 below.
  • the reaction viscous material is compatible with the (meth) acryloyl group-containing compound and is compatible with the photoreactive compound. And was compatible with the cyclic ether group-containing compound and further dissolved in the curable composition.
  • Viscosity exceeds 1200 mPa ⁇ s
  • B Viscosity exceeds 1000 mPa ⁇ s
  • C Viscosity exceeds 500 mPa ⁇ s, 1000 mPa ⁇ s or less
  • D Viscosity is 160 mPa ⁇ s or more, 500 mPa ⁇ s or less
  • E Viscosity is less than 160 mPa ⁇ s
  • the curable composition could be continuously discharged from the head for 10 hours or longer.
  • the curable composition could be discharged from the head continuously for 10 hours or longer, but during the continuous discharge of 10 hours. Slight discharge unevenness occurs
  • the curable composition can be continuously discharged from the head, but cannot be discharged continuously for 10 hours or longer.
  • the curable composition is discharged from the head. Discharge was impossible at the initial stage
  • a glass epoxy substrate (100 mm ⁇ 100 mm) provided with copper wiring on the upper surface was prepared.
  • a curable composition for inkjet is applied onto this substrate by ejecting it from an inkjet head of a piezo-type inkjet printer with an ultraviolet irradiation device, and a pattern of lines (width of the ejection part 80 ⁇ m) and spaces therebetween (width 80 ⁇ m). Drawn in a shape.
  • the head temperature is set to 80 ° C.
  • the head temperature is set to 95 ° C. C.
  • the curable composition for inkjet (thickness 20 ⁇ m) coated on the substrate was irradiated with ultraviolet rays having a wavelength of 365 nm so that the irradiation energy was 1000 mJ / cm 2 .
  • the wet spread of the pattern was visually observed, and the wet spread was determined according to the following criteria.
  • Wet spread state is the target line width + 40 ⁇ m or less
  • Wet spread state exceeds the target line width + 40 ⁇ m and 75 ⁇ m or less
  • the composition layer is wet spread from the drawing portion, and between the lines The interval is lost or the wet spread condition exceeds the target line width +75 ⁇ m.
  • An FR-4 substrate with a copper foil having a copper foil attached to the upper surface was prepared.
  • the ink-jet curable composition was applied from the ink-jet head of a piezo-type ink-jet printer with an ultraviolet irradiation device so that the line width was 80 ⁇ m and the line-to-line spacing was 80 ⁇ m. I tried to draw a pattern. From the ejection properties from the inkjet head at this time, the storage stability was determined according to the following criteria.
  • the head temperature is set to 80 ° C.
  • the head temperature is set to 95 ° C. C.
  • the head temperature is set to 80 ° C.
  • the head temperature is set to 95 ° C. C.
  • the curable composition for inkjet (thickness 20 ⁇ m) drawn in a pattern is irradiated with ultraviolet light having a wavelength of 365 nm so that the irradiation energy is 500 mJ / cm 2, and then heated at 150 ° C. for 1 hour to be fully cured. Then, a resist pattern (cured product film) as a cured product was formed.
  • the surface of the obtained cured product film was visually observed to evaluate whether the cured product film was uneven.
  • the unevenness of the cured product film was determined according to the following criteria.
  • the curable composition for inkjet (thickness 20 ⁇ m) coated on the substrate is irradiated with ultraviolet light having a wavelength of 365 nm so that the irradiation energy becomes 1000 mJ / cm 2, and then heated at 180 ° C. for 1 hour to perform main curing. Then, a resist pattern as a cured product was formed, and a test body was obtained.
  • the obtained specimen was left for 5 minutes at 270 ° C. Then, the adhesiveness with respect to the board
  • Insulation reliability (migration resistance) IPC-B-25 comb test pattern B was prepared.
  • the comb-type test pattern B is heated to 80 ° C., and the curable composition for inkjet is discharged from the inkjet head of the piezo-type inkjet printer with an ultraviolet irradiation device so as to cover the entire surface of the comb-type test pattern B. And coated.
  • the head temperature is set to 80 ° C.
  • the head temperature is set to 95 ° C. C.
  • the coated curable composition for ink jet (thickness 20 ⁇ m) was irradiated with ultraviolet light having a wavelength of 365 nm using a high pressure mercury lamp so that the irradiation energy was 1000 mJ / cm 2 .
  • the primary cured product was heated at 150 ° C. for 60 minutes to be fully cured to form a resist pattern as a cured product, thereby obtaining a test piece.
  • the obtained test piece was subjected to a humidification test for 500 hours under the conditions of applying 85 ° C., 85% relative humidity and 50V direct current.
  • the insulation resistance after the humidification test was measured, and the insulation reliability was judged according to the following criteria.
  • Insulation resistance is 3 ⁇ 10 10 ⁇ or more ⁇ : Insulation resistance is 1 ⁇ 10 9 or more and less than 3 ⁇ 10 10 ⁇ : Insulation resistance is less than 1 ⁇ 10 9
  • Examples 1 to 7 using an ⁇ -aminoalkylphenone type photoradical polymerization initiator having no dimethylamino group and photoradical polymerization initiators other than the ⁇ -aminoalkylphenone type photoradical polymerization initiator were used.
  • the evaluation results of insulation reliability were both “ ⁇ ”, but Example 1 using an ⁇ -aminoalkylphenone type photoradical polymerization initiator having no dimethylamino group was used.
  • the values of insulation resistance in ⁇ 7 were higher than those in Examples 16 and 17 using photo radical polymerization initiators other than the ⁇ -aminoalkylphenone type photo radical polymerization initiator.
  • Example 8 In Examples 8, 18, and 27, the evaluation results of insulation reliability (migration resistance) were all “ ⁇ ”, but the insulation resistance value of Example 27 is the insulation resistance of Example 8. The insulation resistance of Example 18 was higher than that of Example 18.
  • a glass epoxy substrate (100 mm ⁇ 100 mm) provided with copper wiring on the upper surface was prepared.
  • substrate the curable composition for inkjet was discharged from the inkjet head of the piezo-type inkjet printer with an ultraviolet irradiation device, and was coated on the whole surface.
  • the head temperature was set to 80 ° C. during the discharge test of the curable composition having a viscosity of 500 mPa ⁇ s or less, and the head temperature was set to 95 ° C. during the discharge test of the curable composition having a viscosity exceeding 500 mPa ⁇ s.
  • the curable composition for inkjet (thickness 20 ⁇ m) coated on the substrate is irradiated with ultraviolet light having a wavelength of 365 nm so that the irradiation energy is 1000 mJ / cm 2, and then heated at 180 ° C. for 1 hour to obtain a cured product. (Thickness 20 ⁇ m) was obtained.
  • the resulting laminate of the substrate and the cured product was allowed to stand for 24 hours under conditions of 130 ° C. and relative humidity of 85% RH. Thereafter, the adhesion of the cured product to the substrate was confirmed by a cross-cut tape test (JIS 5400 6.15). Make a cut of 100 squares at 1 mm intervals with a cutter on the cured product, and then apply cellophane tape (JIS Z1522) to the cured product with the incised part, and attach one end of the tape to a 45 degree angle. And peeled off strongly to confirm the peeled state.

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Abstract

Provided is a curable composition for inkjet applications, which can be cured into a cured film having improved uniformity and can be cured into a cured product having improved heat resistance. The present invention relates to a curable composition for inkjet applications, which can be applied in an inkjet mode and can be cured by the irradiation with light and the application of heat. This curable composition for inkjet applications comprises: a (meth)acryloyl-group-containing compound which has a (meth)acryloyl group, and which has an aromatic backbone or has such an alicyclic backbone that an unsaturated double bond is contained in an alicyclic backbone; a cyclic-ether-group-containing compound which has at least two cyclic ether groups and has an aromatic backbone; a photoreactive compound which is different from the (meth)acryloyl-group-containing compound; a photopolymerization initiator; and a latent curing agent.

Description

インクジェット用硬化性組成物及び電子部品の製造方法Curable composition for inkjet and method for producing electronic component
　本発明は、インクジェット方式により塗工されるインクジェット用硬化性組成物に関し、基板上にレジストパターンなどの硬化物層を形成するために好適に用いられるインクジェット用硬化性組成物、並びに該インクジェット用硬化性組成物により形成された硬化物層を有する電子部品の製造方法に関する。 The present invention relates to an ink-jet curable composition applied by an ink-jet method, an ink-jet curable composition suitably used for forming a cured layer such as a resist pattern on a substrate, and the ink-jet curing. The present invention relates to a method for manufacturing an electronic component having a cured product layer formed of a conductive composition.
　従来、配線が上面に設けられた基板上に、パターン状のソルダーレジスト膜であるソルダーレジストパターンが形成されたプリント配線板が多く用いられている。電子機器の小型化及び高密度化に伴い、プリント配線板では、より一層微細なソルダーレジストパターンが求められている。 Conventionally, a printed wiring board in which a solder resist pattern, which is a patterned solder resist film, is formed on a substrate on which wiring is provided on the upper surface is often used. With the miniaturization and high density of electronic devices, printed circuit boards are required to have a finer solder resist pattern.
　微細なソルダーレジストパターンを形成する方法として、インクジェット方式によりソルダーレジスト用組成物を塗工する方法が提案されている。インクジェット方式では、スクリーン印刷方式によりソルダーレジストパターンを形成する場合よりも、工程数が少なくなる。このため、インクジェット方式では、ソルダーレジストパターンを容易にかつ効率的に形成することができる。 As a method for forming a fine solder resist pattern, a method of applying a solder resist composition by an ink jet method has been proposed. In the inkjet method, the number of steps is smaller than in the case of forming a solder resist pattern by a screen printing method. For this reason, the solder resist pattern can be easily and efficiently formed by the inkjet method.
　インクジェット方式によりソルダーレジスト用組成物を塗工する場合、塗工時の粘度がある程度低いことが要求される。 When a solder resist composition is applied by an inkjet method, it is required that the viscosity at the time of application is low to some extent.
　そこで、インクジェット方式により塗工可能なソルダーレジスト用組成物が、下記の特許文献１に開示されている。下記の特許文献１には、（メタ）アクリロイル基と熱硬化性官能基とを有するモノマーと、重量平均分子量が７００以下である光反応性希釈剤と、光重合開始剤とを含むインクジェット用硬化性組成物が開示されている。このインクジェット用硬化性組成物の２５℃での粘度は、１５０ｍＰａ・ｓ以下である。 Therefore, a solder resist composition that can be applied by an ink jet method is disclosed in Patent Document 1 below. Patent Document 1 below discloses inkjet curing comprising a monomer having a (meth) acryloyl group and a thermosetting functional group, a photoreactive diluent having a weight average molecular weight of 700 or less, and a photopolymerization initiator. A sex composition is disclosed. The viscosity of the curable composition for inkjet at 25 ° C. is 150 mPa · s or less.
ＷＯ２００４／０９９２７２Ａ１WO2004 / 099272A1
　特許文献１に記載のインクジェット用硬化性組成物の粘度は比較的低い。このため、特許文献１に記載のインクジェット用硬化性組成物は、インクジェット方式にて基板上に塗工することが可能である。 The viscosity of the curable composition for inkjet described in Patent Document 1 is relatively low. For this reason, the curable composition for inkjet described in Patent Document 1 can be coated on a substrate by an inkjet method.
　しかしながら、特許文献１に記載のインクジェット用硬化性組成物では、硬化後の硬化物の耐熱性が低くなるという問題がある。このため、特許文献１に記載のインクジェット用硬化性組成物を用いて基板上にソルダーレジストパターンを形成し、プリント配線板を得た場合に、ソルダーレジストパターンの耐熱性が低いため、プリント配線板を長期間使用できなかったり、プリント配線板の信頼性が低かったりする。 However, the curable composition for inkjet described in Patent Document 1 has a problem that the heat resistance of the cured product after curing is lowered. For this reason, when a solder resist pattern is formed on a substrate using the curable composition for inkjet described in Patent Document 1 and a printed wiring board is obtained, the heat resistance of the solder resist pattern is low. Can not be used for a long time, or the reliability of the printed wiring board is low.
　さらに、特許文献１に記載のインクジェット用硬化性組成物を用いたソルダーレジストパターンにおいて、光硬化した光硬化成分と熱硬化した熱硬化成分とが分離することがある。このため、ソルダーレジストパターンが不均一になるという問題がある。 Furthermore, in the solder resist pattern using the curable composition for inkjet described in Patent Document 1, the photocured photocured component and the heat cured thermoset component may be separated. For this reason, there exists a problem that a soldering resist pattern becomes non-uniform | heterogenous.
　本発明の目的は、インクジェット方式により塗工される硬化性組成物であって、硬化後の硬化物膜の均一性を高めることができ、かつ硬化物の耐熱性を高めることができるインクジェット用硬化性組成物、並びに該インクジェット用硬化性組成物を用いた電子部品の製造方法を提供することである。 An object of the present invention is a curable composition applied by an inkjet method, which can improve the uniformity of a cured film after curing and can improve the heat resistance of the cured product. It is providing the manufacturing method of an electronic component using the curable composition and this curable composition for inkjet.
　本発明の広い局面によれば、インクジェット方式により塗工され、かつ光の照射と熱の付与とにより硬化するインクジェット用硬化性組成物であって、（メタ）アクリロイル基を有し、かつ芳香族骨格を有するか又は不飽和二重結合を脂環式骨格内に含有する脂環式骨格を有する（メタ）アクリロイル基含有化合物と、環状エーテル基を２個以上有し、かつ芳香族骨格を有する環状エーテル基含有化合物と、上記（メタ）アクリロイル基含有化合物以外の光反応性化合物と、光重合開始剤と、潜在性硬化剤とを含む、インクジェット用硬化性組成物が提供される。 According to a wide aspect of the present invention, there is provided a curable composition for inkjet which is applied by an inkjet method and is cured by irradiation with light and application of heat, which has a (meth) acryloyl group and is aromatic. A (meth) acryloyl group-containing compound having an alicyclic skeleton having a skeleton or containing an unsaturated double bond in the alicyclic skeleton, and having two or more cyclic ether groups and an aromatic skeleton There is provided a curable composition for inkjet, comprising a cyclic ether group-containing compound, a photoreactive compound other than the (meth) acryloyl group-containing compound, a photopolymerization initiator, and a latent curing agent.
　本発明に係るインクジェット用硬化性組成物では、ＪＩＳ　Ｋ２２８３に準拠して測定された２５℃での粘度が１００ｍＰａ・ｓ以上、１２００ｍＰａ・ｓ以下であることが好ましい。 In the curable composition for inkjet according to the present invention, the viscosity at 25 ° C. measured in accordance with JIS K2283 is preferably 100 mPa · s or more and 1200 mPa · s or less.
　本発明に係るインクジェット用硬化性組成物のある特定の局面では、上記（メタ）アクリロイル基含有化合物と上記環状エーテル基含有化合物と上記光反応性化合物との合計１００重量％中、上記（メタ）アクリロイル基含有化合物の含有量は１０重量％以上である。 In a specific aspect of the curable composition for inkjet according to the present invention, in the total (100% by weight) of the (meth) acryloyl group-containing compound, the cyclic ether group-containing compound, and the photoreactive compound, the (meth) The content of the acryloyl group-containing compound is 10% by weight or more.
　本発明に係るインクジェット用硬化性組成物の他の特定の局面では、上記潜在性硬化剤は、ジシアンジアミド粒子であるか、又はジシアンジアミドと、該ジシアンジアミドと反応しうる官能基を有する官能基含有化合物とを反応させた反応粘稠物である。上記潜在性硬化剤は、ジシアンジアミドと、該ジシアンジアミドと反応しうる官能基を有する官能基含有化合物とを反応させた反応粘稠物であることが好ましい。 In another specific aspect of the curable composition for inkjet according to the present invention, the latent curing agent is dicyandiamide particles, or dicyandiamide and a functional group-containing compound having a functional group capable of reacting with the dicyandiamide This is a reaction viscous product. The latent curing agent is preferably a reaction viscous product obtained by reacting dicyandiamide with a functional group-containing compound having a functional group capable of reacting with the dicyandiamide.
　上記光重合開始剤は、α－アミノアルキルフェノン型光ラジカル重合開始剤であることが好ましい。上記光重合開始剤は、ジメチルアミノ基を有するα－アミノアルキルフェノン型光ラジカル重合開始剤であることがより好ましい。 The photopolymerization initiator is preferably an α-aminoalkylphenone type photoradical polymerization initiator. The photopolymerization initiator is more preferably an α-aminoalkylphenone type photoradical polymerization initiator having a dimethylamino group.
　本発明に係るインクジェット用硬化性組成物の別の特定の局面では、上記光反応性物は、多環骨格を有し、かつ（メタ）アクリロイル基を２個以上有する多官能化合物を含む。 In another specific aspect of the curable composition for inkjet according to the present invention, the photoreactive substance includes a polyfunctional compound having a polycyclic skeleton and having two or more (meth) acryloyl groups.
　本発明に係るインクジェット用硬化性組成物のさらに別の特定の局面では、上記光反応性化合物は、多環骨格を有し、かつ（メタ）アクリロイル基を１個有する単官能化合物を含む。 In yet another specific aspect of the curable composition for inkjet according to the present invention, the photoreactive compound includes a monofunctional compound having a polycyclic skeleton and having one (meth) acryloyl group.
　本発明に係るインクジェット用硬化性組成物の他の特定の局面では、上記光反応性化合物は、多環骨格を有し、かつ（メタ）アクリロイル基を２個以上有する多官能化合物と、多環骨格を有し、かつ（メタ）アクリロイル基を１個有する単官能化合物との双方を含む。 In another specific aspect of the curable composition for inkjet according to the present invention, the photoreactive compound includes a polyfunctional compound having a polycyclic skeleton and having two or more (meth) acryloyl groups; Both include a monofunctional compound having a skeleton and one (meth) acryloyl group.
　また、本発明の広い局面によれば、本発明に従って構成されたインクジェット用硬化性組成物を、インクジェット方式にて塗工し、パターン状に描画する工程と、パターン状に描画された上記インクジェット用硬化性組成物に光を照射及び熱を付与し、硬化させて、硬化物層を形成する工程とを備える、電子部品の製造方法が提供される。 Moreover, according to the wide aspect of this invention, the process for apply | coating the inkjet curable composition comprised according to this invention by the inkjet system, and drawing it in a pattern form, and the said inkjet use drawn in the pattern form There is provided a method for producing an electronic component, comprising: irradiating light and applying heat to the curable composition and curing the composition to form a cured product layer.
　本発明に係る電子部品の製造方法のある特定の局面では、レジストパターンを有する電子部品であるプリント配線板の製造方法であり、上記インクジェット用硬化性組成物を、インクジェット方式にて塗工し、パターン状に描画し、パターン状に描画された上記インクジェット用硬化性組成物に光を照射及び熱を付与し、硬化させて、レジストパターンを形成する。 In a specific aspect of the method for manufacturing an electronic component according to the present invention, the method is a method for manufacturing a printed wiring board that is an electronic component having a resist pattern, and the inkjet curable composition is applied by an inkjet method, A resist pattern is formed by drawing in a pattern, applying light and applying heat to the curable composition for inkjet drawn in a pattern, and curing the composition.
　本発明に係るインクジェット用硬化性組成物は、（メタ）アクリロイル基を有し、かつ芳香族骨格を有するか又は不飽和二重結合を脂環式骨格内に含有する脂環式骨格を有する（メタ）アクリロイル基含有化合物と、環状エーテル基を２個以上有し、かつ芳香族骨格を有する環状エーテル基含有化合物と、光反応性化合物と、光重合開始剤と、潜在性硬化剤とを含むので、光の照射及び熱の付与により硬化する。さらに、本発明に係るインクジェット用硬化性組成物では、硬化後の硬化物の耐熱性を高めることができる。また、本発明に係るインクジェット用硬化性組成物では、硬化後の硬化物膜の均一性を高めることもできる。 The inkjet curable composition according to the present invention has a (meth) acryloyl group and an aromatic skeleton or an alicyclic skeleton containing an unsaturated double bond in the alicyclic skeleton ( A meth) acryloyl group-containing compound, a cyclic ether group-containing compound having two or more cyclic ether groups and an aromatic skeleton, a photoreactive compound, a photopolymerization initiator, and a latent curing agent. Therefore, it hardens | cures by irradiation of light and provision of heat. Furthermore, the curable composition for inkjet according to the present invention can increase the heat resistance of the cured product after curing. Moreover, in the curable composition for inkjet which concerns on this invention, the uniformity of the hardened | cured material film after hardening can also be improved.
　以下、本発明の詳細を説明する。 Hereinafter, the details of the present invention will be described.
　（インクジェット用硬化性組成物）
　本発明に係るインクジェット用硬化性組成物は、（メタ）アクリロイル基含有化合物（Ａ）と、環状エーテル基含有化合物（Ｂ）と、光反応性化合物（Ｃ）と、光重合開始剤（Ｄ）と、潜在性硬化剤（Ｅ）とを含む。（メタ）アクリロイル基含有化合物（Ａ）は、（メタ）アクリロイル基を有し、かつ芳香族骨格を有するか又は不飽和二重結合を脂環式骨格内に含有する脂環式骨格を有する。環状エーテル基含有化合物（Ｂ）は、環状エーテル基を２個以上有し、かつ芳香族骨格を有する。光反応性化合物（Ｃ）は、（メタ）アクリロイル基含有化合物（Ａ）以外の光反応性化合物である。上記「（メタ）アクリロイル基」の用語は、アクリロイル基とメタクリロイル基とを示す。 (Curable composition for inkjet)
The curable composition for inkjet according to the present invention includes a (meth) acryloyl group-containing compound (A), a cyclic ether group-containing compound (B), a photoreactive compound (C), and a photopolymerization initiator (D). And a latent curing agent (E). The (meth) acryloyl group-containing compound (A) has a (meth) acryloyl group and has an aromatic skeleton or an alicyclic skeleton containing an unsaturated double bond in the alicyclic skeleton. The cyclic ether group-containing compound (B) has two or more cyclic ether groups and an aromatic skeleton. The photoreactive compound (C) is a photoreactive compound other than the (meth) acryloyl group-containing compound (A). The term “(meth) acryloyl group” refers to an acryloyl group and a methacryloyl group.
　本発明に係るインクジェット用硬化性組成物は、（メタ）アクリロイル基含有化合物（Ａ）と光反応性化合物（Ｃ）と光重合開始剤（Ｄ）とを含むので、光の照射により硬化可能である。本発明に係るインクジェット用硬化性組成物は、環状エーテル基含有化合物（Ｂ）と潜在性硬化剤（Ｅ）とを含むので、熱の付与によっても硬化可能である。従って、本発明に係るインクジェット用硬化性組成物は、光の照射と熱の付与とにより硬化可能であり、インクジェット用光及び熱硬化性組成物である。本発明に係るインクジェット用硬化性組成物では、光の照射により一次硬化物を得た後、一次硬化物に熱を付与することにより本硬化させ、レジストパターンなどの硬化物層を得ることができる。このように、光の照射により一次硬化を行うことで、基板等の塗工対象部材上に塗工されたインクジェット用硬化性組成物の濡れ拡がりを抑制することができる。従って、微細なレジストパターンなどの硬化物層を高精度に形成することができる。 Since the curable composition for inkjet according to the present invention contains a (meth) acryloyl group-containing compound (A), a photoreactive compound (C), and a photopolymerization initiator (D), it can be cured by light irradiation. is there. Since the curable composition for inkjet according to the present invention contains the cyclic ether group-containing compound (B) and the latent curing agent (E), it can be cured by application of heat. Therefore, the curable composition for inkjet according to the present invention is curable by light irradiation and application of heat, and is an inkjet light and thermosetting composition. In the curable composition for inkjet according to the present invention, after obtaining a primary cured product by light irradiation, the primary cured product is subjected to main curing by applying heat to obtain a cured product layer such as a resist pattern. . Thus, by performing primary curing by light irradiation, wetting and spreading of the curable composition for inkjet applied onto a coating target member such as a substrate can be suppressed. Therefore, a cured product layer such as a fine resist pattern can be formed with high accuracy.
　さらに、本発明に係るインクジェット用硬化性組成物は、（Ａ）～（Ｅ）成分を含む特定の組成を有し、特に（メタ）アクリロイル基含有化合物（Ａ）が芳香族骨格を有するか又は不飽和二重結合を脂環式骨格内に含有する脂環式骨格を有し、かつ環状エーテル基含有化合物（Ｂ）が芳香族骨格を有するので、硬化物の耐熱性を高めることができる。従って、本発明に係るインクジェット用硬化性組成物を用いた電子部品を長期間使用でき、かつ該電子部品の信頼性を高めることができる。また、本発明に係るインクジェット用硬化性組成物を用いたプリント配線板を長期間使用でき、かつ該プリント配線板の信頼性を高めることができる。 Furthermore, the curable composition for inkjet according to the present invention has a specific composition including the components (A) to (E), and in particular, the (meth) acryloyl group-containing compound (A) has an aromatic skeleton or Since it has an alicyclic skeleton containing an unsaturated double bond in the alicyclic skeleton and the cyclic ether group-containing compound (B) has an aromatic skeleton, the heat resistance of the cured product can be increased. Therefore, the electronic component using the curable composition for inkjet according to the present invention can be used for a long period of time, and the reliability of the electronic component can be improved. Moreover, the printed wiring board using the curable composition for inkjet according to the present invention can be used for a long period of time, and the reliability of the printed wiring board can be improved.
　さらに、本発明に係るインクジェット用硬化性組成物では、（Ａ）～（Ｅ）成分を含む特定の組成を有し、特に（メタ）アクリロイル基含有化合物（Ａ）が芳香族骨格を有するか又は不飽和二重結合を脂環式骨格内に含有する脂環式骨格を有し、かつ環状エーテル基含有化合物（Ｂ）が芳香族骨格を有するので、硬化後の硬化物膜の均一性を高めることもできる。例えば、インクジェット方式によりインクジェット用硬化性組成物を、塗工対象部材上に塗工し、光の照射及び熱の付与により組成物を硬化させることによって、均一なレジストパターンなどの硬化物層を得ることができる。具体的には、例えば、光硬化した光硬化成分と熱硬化した熱硬化成分との分離を抑制でき、レジストパターンなどの硬化物膜において、むらを生じ難くすることができる。 Furthermore, the curable composition for inkjet according to the present invention has a specific composition including the components (A) to (E), and in particular, the (meth) acryloyl group-containing compound (A) has an aromatic skeleton or Since it has an alicyclic skeleton containing an unsaturated double bond in the alicyclic skeleton and the cyclic ether group-containing compound (B) has an aromatic skeleton, the uniformity of the cured film after curing is improved. You can also. For example, a cured product layer such as a uniform resist pattern is obtained by coating a curable composition for inkjet on an application target member by an inkjet method, and curing the composition by light irradiation and application of heat. be able to. Specifically, for example, separation between a photocured photocured component and a heat cured thermoset component can be suppressed, and unevenness can be made difficult to occur in a cured product film such as a resist pattern.
　以下、本発明に係るインクジェット用硬化性組成物に含まれている各成分の詳細を説明する。 Hereinafter, the details of each component contained in the curable composition for inkjet according to the present invention will be described.
　［（メタ）アクリロイル基含有化合物（Ａ）］
　（メタ）アクリロイル基含有化合物（Ａ）は、（メタ）アクリロイル基を有し、かつ芳香族骨格を有するか又は不飽和二重結合を脂環式骨格内に含有する脂環式骨格を有する。（メタ）アクリロイル基含有化合物（Ａ）は、（メタ）アクリロイル基を有するため、光の照射により重合が進行し、硬化する。このため、硬化性組成物を塗工した後に光を照射することにより硬化を進行させることができ、塗工された形状を保持することができ、光が照射された硬化性組成物の一次硬化物及び硬化物が過度に濡れ拡がるのを効果的に抑制することができる。（メタ）アクリロイル基含有化合物（Ａ）は、１種のみが用いられてもよく、２種以上が併用されてもよい。 [(Meth) acryloyl group-containing compound (A)]
The (meth) acryloyl group-containing compound (A) has a (meth) acryloyl group and has an aromatic skeleton or an alicyclic skeleton containing an unsaturated double bond in the alicyclic skeleton. Since the (meth) acryloyl group-containing compound (A) has a (meth) acryloyl group, polymerization proceeds and is cured by irradiation with light. For this reason, curing can be advanced by irradiating light after coating the curable composition, the applied shape can be maintained, and primary curing of the curable composition irradiated with light. It can suppress effectively that a thing and hardened | cured material spread out too much. As for the (meth) acryloyl group containing compound (A), only 1 type may be used and 2 or more types may be used together.
　（メタ）アクリロイル基含有化合物（Ａ）として、（メタ）アクリロイル基を有し、かつ芳香族骨格を有する化合物（Ａ１）と、（メタ）アクリロイル基を有し、かつ不飽和二重結合を脂環式骨格内に含有する脂環式骨格を有する化合物（Ａ２）との内のいずれも用いることができる。 As the (meth) acryloyl group-containing compound (A), a compound (A1) having a (meth) acryloyl group and having an aromatic skeleton, a (meth) acryloyl group and an unsaturated double bond Any of the compounds (A2) having an alicyclic skeleton contained in the cyclic skeleton can be used.
　化合物（Ａ１）のうち（メタ）アクリロイル基を１個有する単官能化合物としては、ベンジル（メタ）アクリレート、フェノキシエチル（メタ）アクリレート及びアルコキシ化フェニル（メタ）アクリレート等が挙げられる。 Examples of the monofunctional compound having one (meth) acryloyl group in the compound (A1) include benzyl (meth) acrylate, phenoxyethyl (meth) acrylate, and alkoxylated phenyl (meth) acrylate.
　化合物（Ａ１）のうち（メタ）アクリロイル基を２個以上有する多官能化合物としては、ビスフェノール型エポキシ化合物等に（メタ）アクリル酸を付加させたエポキシ（メタ）アクリレート類、芳香族ウレタン（メタ）アクリレート類、芳香族ポリエステル（メタ）アクリレート類、エトキシ化ビスフェノールＡ型ジ（メタ）アクリレート類及びプロポキシ化ビスフェノールＡ型ジ（メタ）アクリレート類等が挙げられる。 Among the compound (A1), as a polyfunctional compound having two or more (meth) acryloyl groups, epoxy (meth) acrylates obtained by adding (meth) acrylic acid to a bisphenol type epoxy compound or the like, aromatic urethane (meth) Examples include acrylates, aromatic polyester (meth) acrylates, ethoxylated bisphenol A type di (meth) acrylates, and propoxylated bisphenol A type di (meth) acrylates.
　化合物（Ａ２）の具体例としては、ジシクロペンテニル（メタ）アクリレート及びジシクロペンテニルオキシエチル（メタ）アクリレート等が挙げられる。 Specific examples of the compound (A2) include dicyclopentenyl (meth) acrylate and dicyclopentenyloxyethyl (meth) acrylate.
　（メタ）アクリロイル基含有化合物（Ａ）の配合量は、光の照射及び熱の付与により適度に硬化するように適宜調整され、特に限定されない。（メタ）アクリロイル基含有化合物（Ａ）の配合量の一例を示すと、インクジェット用硬化性組成物１００重量％中、（メタ）アクリロイル基含有化合物（Ａ）の含有量は、１０重量％以上、８０重量％以下であることが好ましい。インクジェット用硬化性組成物１００重量％中、（メタ）アクリロイル基含有化合物（Ａ）の含有量の上限は、成分（Ｂ）～（Ｅ）及び他の成分の含有量などにより適宜調整される。 The amount of the (meth) acryloyl group-containing compound (A) is appropriately adjusted so as to be appropriately cured by light irradiation and heat application, and is not particularly limited. When an example of the blending amount of the (meth) acryloyl group-containing compound (A) is shown, the content of the (meth) acryloyl group-containing compound (A) is 10% by weight or more in 100% by weight of the curable composition for inkjet. It is preferable that it is 80 weight% or less. In 100% by weight of the curable composition for inkjet, the upper limit of the content of the (meth) acryloyl group-containing compound (A) is appropriately adjusted depending on the contents of the components (B) to (E) and other components.
　また、（メタ）アクリロイル基含有化合物（Ａ）と環状エーテル基含有化合物（Ｂ）と光反応性化合物（Ｃ）との合計１００重量％中、（メタ）アクリロイル基含有化合物（Ａ）の含有量は、１０重量％以上であることが好ましい。この場合には、硬化物の耐熱性及び硬化物膜の均一性がより一層高くなる。 The content of the (meth) acryloyl group-containing compound (A) in a total of 100% by weight of the (meth) acryloyl group-containing compound (A), the cyclic ether group-containing compound (B), and the photoreactive compound (C). Is preferably 10% by weight or more. In this case, the heat resistance of the cured product and the uniformity of the cured product film are further enhanced.
　［環状エーテル基含有化合物（Ｂ）］
　環状エーテル基含有化合物（Ｂ）は、環状エーテル基を２個以上有し、かつ芳香族骨格を有する。本発明に係るインクジェット用硬化性組成物は、環状エーテル基含有化合物（Ｂ）を含むので、熱の付与により硬化可能である。環状エーテル基含有化合物（Ｂ）の使用により、光の照射によりインクジェット用硬化性組成物を一次硬化させて一次硬化物を得た後に、熱の付与により一次硬化物をより一層効率的に硬化させることができる。このため、環状エーテル基含有化合物（Ｂ）の使用により、レジストパターンを効率的にかつ精度よく形成することができ、更に硬化物の耐熱性及び絶縁信頼性を高めることができる。環状エーテル基含有化合物（Ｂ）は１種のみが用いられてもよく、２種以上が併用されてもよい。 [Cyclic ether group-containing compound (B)]
The cyclic ether group-containing compound (B) has two or more cyclic ether groups and an aromatic skeleton. Since the curable composition for inkjet according to the present invention contains the cyclic ether group-containing compound (B), it can be cured by application of heat. By using the cyclic ether group-containing compound (B), the curable composition for inkjet is primarily cured by light irradiation to obtain a primary cured product, and then the primary cured product is cured more efficiently by applying heat. be able to. For this reason, by using cyclic ether group containing compound (B), a resist pattern can be formed efficiently and accurately, and also the heat resistance and insulation reliability of hardened material can be improved. As for a cyclic ether group containing compound (B), only 1 type may be used and 2 or more types may be used together.
　環状エーテル基含有化合物（Ｂ）は、芳香族骨格を有する。該芳香族骨格としては、ベンゼン環骨格、ナフタレン環骨格、アントラセン環骨格、フェナントレン環骨格、テトラセン環骨格、クリセン環骨格、トリフェニレン環骨格、テトラフェン環骨格、ピレン環骨格、ペンタセン環骨格、ピセン環骨格及びペリレン環骨格等が挙げられる。硬化性組成物の熱硬化性を適度にし、かつ硬化物の耐熱性をより一層高める観点からは、上記芳香族骨格は、ベンゼン環骨格、ナフタレン環骨格又はアントラセン環骨格であることが好ましい。 The cyclic ether group-containing compound (B) has an aromatic skeleton. Examples of the aromatic skeleton include benzene ring skeleton, naphthalene ring skeleton, anthracene ring skeleton, phenanthrene ring skeleton, tetracene ring skeleton, chrysene ring skeleton, triphenylene ring skeleton, tetraphen ring skeleton, pyrene ring skeleton, pentacene ring skeleton, and picene ring. Examples include a skeleton and a perylene ring skeleton. From the viewpoint of making the thermosetting property of the curable composition moderate and further improving the heat resistance of the cured product, the aromatic skeleton is preferably a benzene ring skeleton, a naphthalene ring skeleton or an anthracene ring skeleton.
　環状エーテル基含有化合物（Ｂ）における環状エーテル基としては、エポキシ基及びオキセタニル基等が挙げられる。なかでも、熱硬化性を高め、かつ耐熱性により一層優れた硬化物を得る観点からは、上記環状エーテル基はエポキシ基であることが好ましい。
　エポキシ基を有する化合物の具体例としては、ビスフェノールＳ型エポキシ化合物、ジグリシジルフタレート化合物、トリグリシジルイソシアヌレートなどの複素環式エポキシ化合物、ビキシレノール型エポキシ化合物、ビフェノール型エポキシ化合物、テトラグリシジルキシレノイルエタン化合物、ビスフェノールＡ型エポキシ化合物、水添ビスフェノールＡ型エポキシ化合物、ビスフェノールＦ型エポキシ化合物、ビスフェノールＡＤ型エポキシ化合物、臭素化ビスフェノールＡ型エポキシ化合物、フェノールノボラック型エポキシ化合物、クレゾールノボラック型エポキシ化合物、脂環式エポキシ化合物、ビスフェノールＡのノボラック型エポキシ化合物、キレート型エポキシ化合物、グリオキザール型エポキシ化合物、アミノ基含有エポキシ化合物、ゴム変性エポキシ化合物、ジシクロペンタジエンフェノリック型エポキシ化合物、シリコーン変性エポキシ化合物及びε－カプロラクトン変性エポキシ化合物等が挙げられる。但し、本発明に係るインクジェット用硬化性組成物では、上述のエポキシ基を有する化合物のうち、芳香族骨格を有するエポキシ化合物が選択されて用いられる。 Examples of the cyclic ether group in the cyclic ether group-containing compound (B) include an epoxy group and an oxetanyl group. Of these, the cyclic ether group is preferably an epoxy group from the viewpoint of enhancing the thermosetting property and obtaining a cured product that is more excellent in heat resistance.
Specific examples of compounds having an epoxy group include heterocyclic epoxy compounds such as bisphenol S type epoxy compounds, diglycidyl phthalate compounds, triglycidyl isocyanurate, bixylenol type epoxy compounds, biphenol type epoxy compounds, tetraglycidyl xylenoyl Ethane compound, bisphenol A type epoxy compound, hydrogenated bisphenol A type epoxy compound, bisphenol F type epoxy compound, bisphenol AD type epoxy compound, brominated bisphenol A type epoxy compound, phenol novolac type epoxy compound, cresol novolac type epoxy compound, fat Cyclic epoxy compounds, bisphenol A novolac type epoxy compounds, chelate type epoxy compounds, glyoxal type epoxy compounds, containing amino groups Epoxy compounds, rubber-modified epoxy compound, dicyclopentadiene phenolic type epoxy compounds, silicone-modified epoxy compounds and ε- caprolactone-modified epoxy compounds and the like. However, in the curable composition for inkjet according to the present invention, an epoxy compound having an aromatic skeleton is selected and used from the above-described compounds having an epoxy group.
　オキセタニル基を有する化合物は、例えば、特許第３０７４０８６号公報に例示されている。但し、本発明に係るインクジェット用硬化性組成物では、芳香族骨格を有するオキセタニル基を有する化合物が用いられる。 Examples of the compound having an oxetanyl group are exemplified in Japanese Patent No. 3074086. However, the curable composition for inkjet according to the present invention uses a compound having an oxetanyl group having an aromatic skeleton.
　上記環状エーテル基含有化合物（Ｂ）は、芳香族骨格を有する。芳香族骨格及び環状エーテル基を有する化合物の使用により、上記硬化性組成物の保管時及び吐出時の熱安定性がより一層良好になり、上記硬化性組成物の保管時にゲル化が生じ難くなる。また、芳香族骨格及び環状エーテル基を有する化合物は、芳香族骨格を有さずかつ環状エーテル基を有する化合物と比べて、（メタ）アクリロイル基含有化合物（Ａ）、光反応性化合物（Ｃ）及び潜在性硬化剤（Ｅ）との相溶性に優れているので、絶縁信頼瀬性がより一層良好になる。 The cyclic ether group-containing compound (B) has an aromatic skeleton. By using a compound having an aromatic skeleton and a cyclic ether group, the thermal stability during storage and ejection of the curable composition is further improved, and gelation is less likely to occur during storage of the curable composition. . Further, the compound having an aromatic skeleton and a cyclic ether group has a (meth) acryloyl group-containing compound (A) and a photoreactive compound (C) as compared with a compound having no aromatic skeleton and having a cyclic ether group. In addition, since the compatibility with the latent curing agent (E) is excellent, the insulation reliability is further improved.
　上記環状エーテル基含有化合物（Ｂ）は２５℃で液状であることが好ましい。環状エーテル基含有化合物（Ｂ）の２５℃での粘度は、３００ｍＰａ・ｓを超えることが好ましい。環状エーテル基含有化合物（Ｂ）の２５℃での粘度は、１５０Ｐａ・ｓ以下であることが好ましく、８０Ｐａ・ｓ以下であることがより好ましい。環状エーテル基含有化合物（Ｂ）の粘度が上記下限以上であると、硬化物層を形成する際の解像度がより一層良好になる。環状エーテル基含有化合物（Ｂ）の粘度が上記上限以下であると、上記硬化性組成物の吐出性がより一層良好になり、環状エーテル基含有化合物（Ｂ）と他の成分との相溶性がより一層高くなり、絶縁信頼性がより一層向上する。 The cyclic ether group-containing compound (B) is preferably liquid at 25 ° C. The viscosity at 25 ° C. of the cyclic ether group-containing compound (B) preferably exceeds 300 mPa · s. The viscosity at 25 ° C. of the cyclic ether group-containing compound (B) is preferably 150 Pa · s or less, and more preferably 80 Pa · s or less. When the viscosity of the cyclic ether group-containing compound (B) is not less than the above lower limit, the resolution when forming the cured product layer is further improved. When the viscosity of the cyclic ether group-containing compound (B) is not more than the above upper limit, the dischargeability of the curable composition is further improved, and the compatibility between the cyclic ether group-containing compound (B) and other components is improved. This further increases the insulation reliability.
　環状エーテル基含有化合物（Ｂ）の配合量は、熱の付与により適度に硬化するように適宜調整され、特に限定されない。インクジェット用硬化性組成物１００重量％中、環状エーテル基含有化合物（Ｂ）の含有量は３重量％以上、６０重量％以下であることが好ましい。インクジェット用硬化性組成物１００重量％中、環状エーテル基含有化合物（Ｂ）の含有量は、より好ましくは５重量％以上、より好ましくは５０重量％以下である。環状エーテル基含有化合物（Ｂ）の含有量が上記下限以上であると、熱の付与により硬化性組成物をより一層効果的に硬化させることができる。環状エーテル基含有化合物（Ｂ）の含有量が上記上限以下であると、硬化物の耐熱性がより一層高くなり、インクジェット方式により塗工されたインクジェット用硬化性組成物が濡れ拡がるのをより一層抑制できる。 The amount of the cyclic ether group-containing compound (B) is appropriately adjusted so as to be appropriately cured by application of heat, and is not particularly limited. In 100% by weight of the curable composition for inkjet, the content of the cyclic ether group-containing compound (B) is preferably 3% by weight or more and 60% by weight or less. In 100% by weight of the curable composition for inkjet, the content of the cyclic ether group-containing compound (B) is more preferably 5% by weight or more, and more preferably 50% by weight or less. When the content of the cyclic ether group-containing compound (B) is not less than the above lower limit, the curable composition can be more effectively cured by applying heat. When the content of the cyclic ether group-containing compound (B) is not more than the above upper limit, the heat resistance of the cured product is further increased, and the ink-jet curable composition applied by the ink-jet method is further spread out. Can be suppressed.
　［光反応性化合物（Ｃ）］
　光反応性化合物（Ｃ）は、（メタ）アクリロイル基含有化合物（Ａ）以外の光反応性化合物である。光反応性化合物（Ｃ）は、芳香族骨格を有さず、かつ不飽和二重結合を脂環式骨格内に含有する脂環式骨格を有さないことが好ましい。光反応性化合物（Ｃ）は、１種のみが用いられてもよく、２種以上が併用されてもよい。 [Photoreactive compound (C)]
The photoreactive compound (C) is a photoreactive compound other than the (meth) acryloyl group-containing compound (A). The photoreactive compound (C) preferably does not have an aromatic skeleton and does not have an alicyclic skeleton containing an unsaturated double bond in the alicyclic skeleton. As for a photoreactive compound (C), only 1 type may be used and 2 or more types may be used together.
　光反応性化合物（Ｃ）としては、（メタ）アクリロイル基を２個以上有する多官能化合物及び（メタ）アクリロイル基を１個有する単官能化合物等が挙げられる。 Examples of the photoreactive compound (C) include polyfunctional compounds having two or more (meth) acryloyl groups and monofunctional compounds having one (meth) acryloyl group.
　上記多官能化合物としては、多価アルコールの（メタ）アクリル酸付加物、多価アルコールのアルキレンオキサイド変性物の（メタ）アクリル酸付加物、ウレタン（メタ）アクリレート類、及びポリエステル（メタ）アクリレート類等が挙げられる。上記多価アルコールとしては、ジエチレングリコール、トリエチレングリコール、ポリエチレングリコール、ジプロピレングリコール、トリプロピレングリコール、ポリプロピレングリコール、トリメチロールプロパン、シクロヘキサンジメタノール、トリシクロデカンジメタノール及びペンタエリスリトール等が挙げられる。 Examples of the polyfunctional compound include (meth) acrylic acid adducts of polyhydric alcohols, (meth) acrylic acid adducts of alkylene oxide modified polyhydric alcohols, urethane (meth) acrylates, and polyester (meth) acrylates. Etc. Examples of the polyhydric alcohol include diethylene glycol, triethylene glycol, polyethylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, trimethylolpropane, cyclohexanedimethanol, tricyclodecane dimethanol, and pentaerythritol.
　光反応性化合物（Ｃ）のうち多官能化合物の具体例としては、トリエチレングリコールジ（メタ）アクリレート及びトリシクロデカンジメタノールジ（メタ）アクリレート等が挙げられる。 Specific examples of the polyfunctional compound in the photoreactive compound (C) include triethylene glycol di (meth) acrylate and tricyclodecane dimethanol di (meth) acrylate.
　光反応性化合物（Ｃ）のうち単官能化合物の具体例としては、イソボルニル（メタ）アクリレート及びシクロペンタニル（メタ）アクリレート等が挙げられる。 Specific examples of monofunctional compounds in the photoreactive compound (C) include isobornyl (meth) acrylate and cyclopentanyl (meth) acrylate.
　光反応性化合物（Ｃ）は、多環骨格を有し、かつ（メタ）アクリロイル基を有する化合物（Ｃ１）を含むことが好ましい。該化合物（Ｃ１）の使用により、上記インクジェット用硬化性組成物の硬化物の耐湿熱性を高くすることができる。従って、本発明に係るインクジェット用硬化性組成物を用いたプリント配線板等の電子部品を長期間使用でき、かつ該電子部品の信頼性を高めることができる。 The photoreactive compound (C) preferably includes a compound (C1) having a polycyclic skeleton and having a (meth) acryloyl group. The use of the compound (C1) can increase the heat and moisture resistance of the cured product of the curable composition for inkjet. Therefore, an electronic component such as a printed wiring board using the curable composition for inkjet according to the present invention can be used for a long period of time, and the reliability of the electronic component can be increased.
　上記化合物（Ｃ１）は、多環骨格を有し、かつ（メタ）アクリロイル基を２個以上有する多官能化合物（Ｃ１－１）であることが好ましい。従って、光反応性化合物（Ｃ）は、多環骨格を有し、かつ（メタ）アクリロイル基を２個以上有する多官能化合物（Ｃ１－１）を含むことが好ましい。上記化合物（Ｃ１）は、多環骨格を有し、かつ（メタ）アクリロイル基を１個有する単官能化合物（Ｃ１－２）であることも好ましい。従って、光反応性化合物（Ｃ）は、多環骨格を有し、かつ（メタ）アクリロイル基を１個有する単官能化合物（Ｃ１－２）を含むことが好ましい。なかでも、硬化物の耐湿熱性をより一層高める観点からは、多環骨格を有し、かつ（メタ）アクリロイル基を２個以上有する多官能化合物（Ｃ１－１）が好ましい。 The compound (C1) is preferably a polyfunctional compound (C1-1) having a polycyclic skeleton and having two or more (meth) acryloyl groups. Accordingly, the photoreactive compound (C) preferably includes a polyfunctional compound (C1-1) having a polycyclic skeleton and having two or more (meth) acryloyl groups. The compound (C1) is preferably a monofunctional compound (C1-2) having a polycyclic skeleton and having one (meth) acryloyl group. Accordingly, the photoreactive compound (C) preferably includes a monofunctional compound (C1-2) having a polycyclic skeleton and having one (meth) acryloyl group. Among these, from the viewpoint of further improving the heat and moisture resistance of the cured product, a polyfunctional compound (C1-1) having a polycyclic skeleton and having two or more (meth) acryloyl groups is preferable.
　さらに、光反応性化合物（Ｃ）は、多環骨格を有し、かつ（メタ）アクリロイル基を２個以上有する多官能化合物（Ｃ１－１）と、多環骨格を有し、かつ（メタ）アクリロイル基を１個有する単官能化合物（Ｃ１－２）との双方を含むことがより好ましい。これらの場合には、上記インクジェット用硬化性組成物の硬化物の耐湿熱性がかなり高くなる。従って、本発明に係るインクジェット用硬化性組成物を用いたプリント配線板などの電子部品をより一層長期間使用でき、かつ該電子部品の信頼性がより一層高くなる。また、単官能化合物（Ｃ１－２）の使用により、硬化物の耐湿熱性が高くなるだけでなく、硬化性組成物の吐出性も高くなる。なお、多環骨格を有し、かつ（メタ）アクリロイル基を１個有する単官能化合物（Ｃ１－２）を用いた場合には、多環骨格を有さず、かつ（メタ）アクリロイル基を１個有する単官能化合物を用いた場合と比べて、硬化物の耐湿熱性が高くなる。 Further, the photoreactive compound (C) includes a polyfunctional compound (C1-1) having a polycyclic skeleton and having two or more (meth) acryloyl groups, a polycyclic skeleton, and (meth) More preferably, it includes both a monofunctional compound (C1-2) having one acryloyl group. In these cases, the heat-and-moisture resistance of the cured product of the ink-jet curable composition is considerably increased. Therefore, an electronic component such as a printed wiring board using the curable composition for inkjet according to the present invention can be used for a longer period of time, and the reliability of the electronic component is further enhanced. Further, the use of the monofunctional compound (C1-2) not only increases the heat and moisture resistance of the cured product, but also increases the dischargeability of the curable composition. In the case of using a monofunctional compound (C1-2) having a polycyclic skeleton and having one (meth) acryloyl group, the polyfunctional skeleton has no (meth) acryloyl group. Compared with the case where the monofunctional compound which has one piece is used, the heat-and-moisture resistance of hardened | cured material becomes high.
　多官能化合物（Ｃ１－１）は、多環骨格を有し、かつ（メタ）アクリロイル基を２個以上有すれば特に限定されない。多官能化合物（Ｃ１－１）として、多環骨格を有し、かつ（メタ）アクリロイル基を２個以上有する従来公知の多官能化合物を用いることができる。多官能化合物（Ｃ１－１）は、（メタ）アクリロイル基を２つ以上有するため、光の照射により重合が進行し、硬化する。多官能化合物（Ｃ１－１）は、１種のみが用いられてもよく、２種以上が併用されてもよい。 The polyfunctional compound (C1-1) is not particularly limited as long as it has a polycyclic skeleton and two or more (meth) acryloyl groups. As the polyfunctional compound (C1-1), a conventionally known polyfunctional compound having a polycyclic skeleton and having two or more (meth) acryloyl groups can be used. Since the polyfunctional compound (C1-1) has two or more (meth) acryloyl groups, polymerization proceeds and cures upon irradiation with light. As the polyfunctional compound (C1-1), only one type may be used, or two or more types may be used in combination.
　多官能化合物（Ｃ１－１）としては、多価アルコールの（メタ）アクリル酸付加物、多価アルコールのアルキレンオキサイド変性物の（メタ）アクリル酸付加物、ウレタン（メタ）アクリレート類、及びポリエステル（メタ）アクリレート類等が挙げられる。上記多価アルコールとしては、ジエチレングリコール、トリエチレングリコール、ポリエチレングリコール、ジプロピレングリコール、トリプロピレングリコール、ポリプロピレングリコール、トリメチロールプロパン及びペンタエリスリトール等が挙げられる。 Examples of the polyfunctional compound (C1-1) include (meth) acrylic acid adducts of polyhydric alcohols, (meth) acrylic acid adducts of alkylene oxide-modified polyhydric alcohols, urethane (meth) acrylates, and polyesters ( And (meth) acrylates. Examples of the polyhydric alcohol include diethylene glycol, triethylene glycol, polyethylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, trimethylolpropane, and pentaerythritol.
　多官能化合物（Ｃ１－１）の具体例としては、トリシクロデカンジメタノールジ（メタ）アクリレート及びイソボルニルジメタノールジ（メタ）アクリレート等が挙げられる。なかでも、硬化物の耐湿熱性をより一層高める観点からは、多官能化合物（Ｃ１－１）は、トリシクロデカンジメタノールジ（メタ）アクリレートであることが好ましい。上記「（メタ）アクリレート」の用語は、アクリレートとメタクリレートとを示す。 Specific examples of the polyfunctional compound (C1-1) include tricyclodecane dimethanol di (meth) acrylate and isobornyl dimethanol di (meth) acrylate. Among these, from the viewpoint of further improving the heat and humidity resistance of the cured product, the polyfunctional compound (C1-1) is preferably tricyclodecane dimethanol di (meth) acrylate. The term “(meth) acrylate” refers to acrylate and methacrylate.
　上記単官能化合物（Ｃ１－２）は、多環骨格を有し、かつ（メタ）アクリロイル基を１個有すれば特に限定されない。単官能化合物（Ｃ１－２）として、多環骨格を有し、かつ（メタ）アクリロイル基を１個有する従来公知の単官能化合物を用いることができる。単官能化合物（Ｃ１－２）は、１種のみが用いられてもよく、２種以上が併用されてもよい。 The monofunctional compound (C1-2) is not particularly limited as long as it has a polycyclic skeleton and one (meth) acryloyl group. As the monofunctional compound (C1-2), a conventionally known monofunctional compound having a polycyclic skeleton and having one (meth) acryloyl group can be used. As the monofunctional compound (C1-2), only one type may be used, or two or more types may be used in combination.
　上記単官能化合物（Ｃ１－２）の具体例としては、イソボルニル（メタ）アクリレート、ジヒドロキシシクロペンタジエニル（メタ）アクリレート及びジシクロペンタニル（メタ）アクリレート等が挙げられる。なかでも、硬化物の耐湿熱性をより一層高める観点からは、単官能化合物（Ｃ１－２）は、イソボルニル（メタ）アクリレート、ジヒドロキシシクロペンタジエニル（メタ）アクリレート、及びジシクロペンタニル（メタ）アクリレートからなる群から選択された少なくとも１種であることが好ましい。 Specific examples of the monofunctional compound (C1-2) include isobornyl (meth) acrylate, dihydroxycyclopentadienyl (meth) acrylate, and dicyclopentanyl (meth) acrylate. Among these, from the viewpoint of further improving the heat and heat resistance of the cured product, the monofunctional compound (C1-2) is composed of isobornyl (meth) acrylate, dihydroxycyclopentadienyl (meth) acrylate, and dicyclopentanyl (meth). It is preferably at least one selected from the group consisting of acrylates.
　化合物（Ｃ１）における上記「多環骨格」とは、複数の環状骨格を連続して有する構造を示す。化合物（Ｃ１）における上記多環骨格としてはそれぞれ、多環脂環式骨格等が挙げられる。 The “polycyclic skeleton” in the compound (C1) represents a structure having a plurality of cyclic skeletons continuously. Examples of the polycyclic skeleton in the compound (C1) include a polycyclic alicyclic skeleton.
　上記多環脂環式骨格としては、ビシクロアルカン骨格、トリシクロアルカン骨格、テトラシクロアルカン骨格及びイソボルニル骨格等が挙げられる。 Examples of the polycyclic alicyclic skeleton include a bicycloalkane skeleton, a tricycloalkane skeleton, a tetracycloalkane skeleton, and an isobornyl skeleton.
　光反応性化合物（Ｃ）の配合量は、光の照射により適度に硬化するように適宜調整され、特に限定されない。インクジェット用硬化性組成物１００重量％中、光反応性化合物（Ｃ）の含有量は３重量％以上、８０重量％以下であることが好ましい。インクジェット用硬化性組成物１００重量％中、光反応性化合物（Ｃ）の含有量は、より好ましくは５重量％以上、より好ましくは７０重量％以下である。光反応性化合物（Ｃ）の含有量が上記下限以上であると、光の照射により硬化性組成物をより一層効果的に硬化させることができる。光反応性化合物（Ｃ）の含有量が上記上限以上であると、熱硬化時にむらが発生することがある。 The blending amount of the photoreactive compound (C) is appropriately adjusted so as to be appropriately cured by light irradiation, and is not particularly limited. In 100% by weight of the curable composition for inkjet, the content of the photoreactive compound (C) is preferably 3% by weight or more and 80% by weight or less. In 100% by weight of the curable composition for inkjet, the content of the photoreactive compound (C) is more preferably 5% by weight or more, and more preferably 70% by weight or less. When the content of the photoreactive compound (C) is not less than the above lower limit, the curable composition can be more effectively cured by light irradiation. If the content of the photoreactive compound (C) is not less than the above upper limit, unevenness may occur during thermosetting.
　インクジェット用硬化性組成物１００重量％中、化合物（Ｃ１）の含有量は、好ましくは５重量％以上、より好ましくは１０重量％以上、更に好ましくは２０重量％以上、好ましくは８０重量％以下、より好ましくは７０重量％以下、更に好ましくは６０重量％以下である。インクジェット用硬化性組成物１００重量％中、化合物（Ｃ１－１）及び化合物（Ｃ１－２）の各含有量は、好ましくは５重量％以上、より好ましくは１０重量％以上、更に好ましくは２０重量％以上、好ましくは８０重量％以下、より好ましくは７０重量％以下、更に好ましくは６０重量％以下、特に好ましくは５０重量％以下である。化合物（Ｃ１）、化合物（Ｃ１－１）及び化合物（Ｃ１－２）の各含有量が上記下限以上であると、硬化物の耐湿熱性がより一層高くなる。化合物（Ｃ１）、化合物（Ｃ１－１）及び化合物（Ｃ１－２）の各含有量が上記上限以下であると、光の照射及び熱の付与により硬化性組成物を効果的に硬化させることができる。 In 100% by weight of the curable composition for inkjet, the content of the compound (C1) is preferably 5% by weight or more, more preferably 10% by weight or more, further preferably 20% by weight or more, preferably 80% by weight or less, More preferably, it is 70 weight% or less, More preferably, it is 60 weight% or less. Each content of the compound (C1-1) and the compound (C1-2) in 100% by weight of the curable composition for inkjet is preferably 5% by weight or more, more preferably 10% by weight or more, and further preferably 20% by weight. % Or more, preferably 80% by weight or less, more preferably 70% by weight or less, still more preferably 60% by weight or less, and particularly preferably 50% by weight or less. When each content of the compound (C1), the compound (C1-1) and the compound (C1-2) is not less than the above lower limit, the moisture and heat resistance of the cured product is further enhanced. When each content of the compound (C1), the compound (C1-1) and the compound (C1-2) is not more than the above upper limit, the curable composition can be effectively cured by irradiation with light and application of heat. it can.
　［光重合開始剤（Ｄ）］
　光の照射により硬化性組成物を硬化させるために、本発明に係るインクジェット用硬化性組成物は、光重合開始剤（Ｄ）を含む。光重合開始剤（Ｄ）としては、光ラジカル重合開始剤及び光カチオン重合開始剤等が挙げられる。光重合開始剤（Ｄ）は、光ラジカル重合開始剤であることが好ましい。光重合開始剤（Ｄ）は、１種のみが用いられてもよく、２種以上が併用されてもよい。 [Photoinitiator (D)]
In order to cure the curable composition by light irradiation, the curable composition for inkjet according to the present invention includes a photopolymerization initiator (D). Examples of the photopolymerization initiator (D) include a radical photopolymerization initiator and a cationic photopolymerization initiator. The photopolymerization initiator (D) is preferably a photoradical polymerization initiator. As for a photoinitiator (D), only 1 type may be used and 2 or more types may be used together.
　上記光ラジカル重合開始剤は特に限定されない。上記光ラジカル重合開始剤は、光の照射によりラジカルを発生し、ラジカル重合反応を開始するための化合物である。上記光ラジカル重合開始剤の具体例としては、例えば、ベンゾイン、ベンゾインアルキルエーテル類、アセトフェノン類、アミノアセトフェノン類、アントラキノン類、チオキサントン類、ケタール類、２，４，５－トリアリールイミダゾール二量体、リボフラビンテトラブチレート、チオール化合物、２，４，６－トリス－ｓ－トリアジン、有機ハロゲン化合物、ベンゾフェノン類、キサントン類及び２，４，６－トリメチルベンゾイルジフェニルホスフィンオキサイド等が挙げられる。上記光ラジカル重合開始剤は、１種のみが用いられてもよく、２種以上が併用されてもよい。 The photo radical polymerization initiator is not particularly limited. The photo radical polymerization initiator is a compound for generating radicals upon light irradiation and initiating a radical polymerization reaction. Specific examples of the photo radical polymerization initiator include, for example, benzoin, benzoin alkyl ethers, acetophenones, aminoacetophenones, anthraquinones, thioxanthones, ketals, 2,4,5-triarylimidazole dimer, Examples include riboflavin tetrabutyrate, thiol compounds, 2,4,6-tris-s-triazine, organic halogen compounds, benzophenones, xanthones, and 2,4,6-trimethylbenzoyldiphenylphosphine oxide. As for the said radical photopolymerization initiator, only 1 type may be used and 2 or more types may be used together.
　上記ベンゾインアルキルエーテル類としては、ベンゾインメチルエーテル、ベンゾインエチルエーテル及びベンゾインイソプロピルエーテル等が挙げられる。上記アセトフェノン類としては、アセトフェノン、２，２－ジメトキシ－２－フェニルアセトフェノン、２，２－ジエトキシ－２－フェニルアセトフェノン及び１，１－ジクロロアセトフェノン等が挙げられる。上記アミノアセトフェノン類としては、２－メチル－１－［４－（メチルチオ）フェニル］－２－モルホリノプロパン－１－オン、２－ベンジル－２－ジメチルアミノ－１－（４－モルホリノフェニル）－ブタン－１－オン及びＮ，Ｎ－ジメチルアミノアセトフェン等が挙げられる。上記アントラキノン類としては、２－メチルアントラキノン、２－エチルアントラキノン、２－ｔ－ブチルアントラキノン及び１－クロロアントラキノン等が挙げられる。上記チオキサントン類としては、２，４－ジメチルチオキサントン、２，４－ジエチルチオキサントン、２－クロロチオキサントン及び２，４－ジイソプロピルチオキサントン等が挙げられる。上記ケタール類としては、アセトフェノンジメチルケタール及びベンジルジメチルケタール等が挙げられる。上記チオール化合物としては、２－メルカプトベンゾイミダゾール、２－メルカプトベンゾオキサゾール及び２－メルカプトベンゾチアゾール等が挙げられる。上記有機ハロゲン化合物としては、２，２，２－トリブロモエタノール及びトリブロモメチルフェニルスルホン等が挙げられる。上記ベンゾフェノン類としては、ベンゾフェノン及び４，４’－ビスジエチルアミノベンゾフェノン等が挙げられる。 Examples of the benzoin alkyl ethers include benzoin methyl ether, benzoin ethyl ether, and benzoin isopropyl ether. Examples of the acetophenones include acetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, 1,1-dichloroacetophenone, and the like. Examples of the aminoacetophenones include 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butane Examples include -1-one and N, N-dimethylaminoacetophene. Examples of the anthraquinones include 2-methylanthraquinone, 2-ethylanthraquinone, 2-t-butylanthraquinone and 1-chloroanthraquinone. Examples of the thioxanthones include 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, 2-chlorothioxanthone, and 2,4-diisopropylthioxanthone. Examples of the ketals include acetophenone dimethyl ketal and benzyl dimethyl ketal. Examples of the thiol compound include 2-mercaptobenzoimidazole, 2-mercaptobenzoxazole and 2-mercaptobenzothiazole. Examples of the organic halogen compound include 2,2,2-tribromoethanol and tribromomethylphenyl sulfone. Examples of the benzophenones include benzophenone and 4,4'-bisdiethylaminobenzophenone.
　上記光ラジカル重合開始剤は、α－アミノアルキルフェノン型光ラジカル重合開始剤であることが好ましく、ジメチルアミノ基を有するα－アミノアルキルフェノン型光ラジカル重合開始剤であることがより好ましい。この特定の光ラジカル重合開始剤の使用により、露光量が少なくても、インクジェット用硬化性組成物を効率的に光硬化させることが可能になる。このため、光の照射によって、塗工されたインクジェット用硬化性組成物が濡れ拡がるのを効果的に抑制でき、微細なレジストパターンを高精度に形成することができる。さらに、上記光ラジカル重合開始剤がジメチルアミノ基を有するα－アミノアルキルフェノン型光重合開始剤である場合には、熱硬化速度を速くすることができ、組成物の光照射物の熱硬化性を良好にすることができる。 The photo radical polymerization initiator is preferably an α-aminoalkylphenone type photo radical polymerization initiator, and more preferably an α-aminoalkyl phenone type photo radical polymerization initiator having a dimethylamino group. By using this specific radical photopolymerization initiator, the curable composition for inkjet can be efficiently photocured even if the exposure amount is small. For this reason, it can suppress effectively that the coated curable composition for inkjet by wet irradiation spreads, and can form a fine resist pattern with high precision. Further, when the photo radical polymerization initiator is an α-aminoalkylphenone type photo polymerization initiator having a dimethylamino group, the thermosetting speed can be increased, and the thermosetting property of the light irradiated product of the composition can be increased. Can be improved.
　本発明者らは、ジメチルアミノ基を有するα－アミノアルキルフェノン型光ラジカル重合開始剤の使用により、光硬化性を良好にすることができるだけでなく、熱硬化性をも良好にすることができることを見出した。上記ジメチルアミノ基を有するα－アミノアルキルフェノン型光ラジカル重合開始剤は、熱硬化性の向上に大きく寄与する成分である。さらに、ジメチルアミノ基を有するα－アミノアルキルフェノン型光ラジカル重合開始剤の使用により、硬化物の耐熱性及び絶縁信頼性を高めることができる。絶縁信頼性に優れていると、本発明に係るインクジェット用硬化性組成物により形成されたレジストパターンを有するプリント配線板などの電子部品が高湿度の条件下で長期間使用されても、絶縁抵抗が充分に高く維持される。 The present inventors can not only improve the photocurability but also improve the thermosetting property by using an α-aminoalkylphenone type photoradical polymerization initiator having a dimethylamino group. I found. The α-aminoalkylphenone type photoradical polymerization initiator having a dimethylamino group is a component that greatly contributes to improvement of thermosetting. Furthermore, by using an α-aminoalkylphenone type photoradical polymerization initiator having a dimethylamino group, the heat resistance and insulation reliability of the cured product can be enhanced. Even if an electronic component such as a printed wiring board having a resist pattern formed by the curable composition for inkjet according to the present invention is used for a long time under a high humidity condition, the insulation resistance is excellent. Is kept high enough.
　上記α－アミノアルキルフェノン型光ラジカル重合開始剤の具体例としては、ＢＡＳＦ社製のＩＲＧＡＣＵＲＥ９０７、ＩＲＧＡＣＵＲＥ３６９、ＩＲＧＡＣＵＲＥ３７９及びＩＲＧＡＣＵＲＥ３７９ＥＧ等が挙げられる。これら以外のα－アミノアルキルフェノン型光重合開始剤を用いてもよい。中でも、インクジェット用硬化性組成物の光硬化性と硬化物による絶縁信頼性とをより一層良好にする観点からは、２－ベンジル－２－ジメチルアミノ－１－（４－モルフォリノフェニル）－ブタノン－１（ＩＲＧＡＣＵＲＥ３６９）又は２－（ジメチルアミノ）－２－［（４－メチルフェニル）メチル］－１－［４－（４－モルホリニル）フェニル］－１－ブタノン（ＩＲＧＡＣＵＲＥ３７９又はＩＲＧＡＣＵＲＥ３７９ＥＧ）が好ましい。これらはジメチルアミノ基を有するα－アミノアルキルフェノン型光ラジカル重合開始剤である。 Specific examples of the α-aminoalkylphenone type photo radical polymerization initiator include IRGACURE907, IRGACURE369, IRGACURE379, and IRGACURE379EG manufactured by BASF. Other α-aminoalkylphenone type photopolymerization initiators may be used. Among these, from the viewpoint of further improving the photocurability of the curable composition for inkjet and the insulation reliability of the cured product, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone. -1 (IRGACURE369) or 2- (dimethylamino) -2-[(4-methylphenyl) methyl] -1- [4- (4-morpholinyl) phenyl] -1-butanone (IRGACURE379 or IRGACURE379EG) is preferred. These are α-aminoalkylphenone type photoradical polymerization initiators having a dimethylamino group.
　上記光ラジカル重合開始剤とともに、光重合開始助剤を用いてもよい。該光重合開始助剤としては、Ｎ，Ｎ－ジメチルアミノ安息香酸エチルエステル、Ｎ，Ｎ－ジメチルアミノ安息香酸イソアミルエステル、ペンチル－４－ジメチルアミノベンゾエート、トリエチルアミン及びトリエタノールアミン等が挙げられる。これら以外の光重合開始助剤を用いてもよい。上記光重合開始助剤は、１種のみが用いられてもよく、２種以上が併用されてもよい。 A photopolymerization initiation assistant may be used together with the photoradical polymerization initiator. Examples of the photopolymerization initiation assistant include N, N-dimethylaminobenzoic acid ethyl ester, N, N-dimethylaminobenzoic acid isoamyl ester, pentyl-4-dimethylaminobenzoate, triethylamine, and triethanolamine. Photopolymerization initiation assistants other than these may be used. As for the said photoinitiation adjuvant, only 1 type may be used and 2 or more types may be used together.
　また、可視光領域に吸収があるＣＧＩ－７８４等（チバ・スペシャルティ・ケミカルズ社製）のチタノセン化合物などを、光反応を促進するために用いてもよい。 Further, a titanocene compound such as CGI-784 (manufactured by Ciba Specialty Chemicals) having absorption in the visible light region may be used to promote the photoreaction.
　上記光カチオン重合開始剤としては特に限定されず、例えば、スルホニウム塩、ヨードニウム塩、メタロセン化合物及びベンゾイントシレート等が挙げられる。上記光カチオン重合開始剤は、１種のみが用いられてもよく、２種以上が併用されてもよい。 The photocationic polymerization initiator is not particularly limited, and examples thereof include sulfonium salts, iodonium salts, metallocene compounds, and benzoin tosylate. As for the said photocationic polymerization initiator, only 1 type may be used and 2 or more types may be used together.
　（メタ）アクリロイル基含有化合物（Ａ）と光反応性化合物（Ｃ）との合計１００重量部に対して、光重合開始剤（Ｄ）の含有量は、好ましくは０．１重量部以上、より好ましくは１重量部以上、更に好ましくは３重量部以上、好ましくは３０重量部以下、より好ましくは１５重量部以下、更に好ましくは１０重量部以下である。光重合開始剤（Ｄ）の含有量が上記下限以上及び上記上限以下であると、光の照射により硬化性組成物がより一層効果的に硬化する。 The content of the photopolymerization initiator (D) is preferably 0.1 parts by weight or more with respect to a total of 100 parts by weight of the (meth) acryloyl group-containing compound (A) and the photoreactive compound (C). The amount is preferably 1 part by weight or more, more preferably 3 parts by weight or more, preferably 30 parts by weight or less, more preferably 15 parts by weight or less, and still more preferably 10 parts by weight or less. When the content of the photopolymerization initiator (D) is not less than the above lower limit and not more than the above upper limit, the curable composition is more effectively cured by light irradiation.
　［潜在性硬化剤（Ｅ）］
　熱の付与によって効率的に硬化可能にするために、本発明に係るインクジェット用硬化性組成物は、潜在性硬化剤（Ｅ）を含む。潜在性硬化剤（Ｅ）は特に限定されない。潜在性硬化剤（Ｅ）として、従来公知の潜在性硬化剤を用いることができる。潜在性硬化剤（Ｅ）は、１種のみが用いられてもよく、２種以上が併用されてもよい。 [Latent curing agent (E)]
In order to enable efficient curing by application of heat, the curable composition for inkjet according to the present invention includes a latent curing agent (E). The latent curing agent (E) is not particularly limited. A conventionally known latent curing agent can be used as the latent curing agent (E). As for latent hardening agent (E), only 1 type may be used and 2 or more types may be used together.
　潜在性硬化剤（Ｅ）としては、ジシアンジアミド粒子、ヒドラジド系化合物、メチル（メタ）アクリレート樹脂又はスチレン樹脂等により形成されたシェルにより、トリフェニルホスフィン（熱硬化剤）が被覆されている潜在性硬化剤（例えば、日本化薬社製「ＥＰＣＡＴ－Ｐ」及び「ＥＰＣＡＴ－ＰＳ」）、ポリウレア系重合体又はラジカル重合体により形成されたシェルにより、アミンなどの熱硬化剤が被覆されている潜在性硬化剤（特許第３０３１８９７号公報及び特許第３１９９８１８号公報に記載）、変性イミダゾールなどの熱硬化剤をエポキシ樹脂中に分散させて閉じ込め、粉砕することにより得られた潜在性硬化剤（旭化成イーマテリアルズ社製「ノバキュアＨＸＡ３７９２」及び「ＨＸＡ３９３２ＨＰ」）、熱可塑性高分子内に硬化剤を分散させ、含有させた潜在性硬化剤（特許第３０９８０６１号公報に記載）、並びにテトラキスフェノール類化合物などにより被覆されたイミダゾール潜在性硬化剤（例えば、日本曹達製「ＴＥＰ－２Ｅ４ＭＺ」及び「ＨＩＰＡ－２Ｅ４ＭＺ」）等が挙げられる。これら以外の潜在性硬化剤を用いてもよい。 The latent curing agent (E) is a latent curing in which triphenylphosphine (thermosetting agent) is coated with a shell formed of dicyandiamide particles, hydrazide compounds, methyl (meth) acrylate resin, styrene resin, or the like. Potential that a thermosetting agent such as amine is coated with a shell formed of an agent (for example, “EPCAT-P” and “EPCAT-PS” manufactured by Nippon Kayaku Co., Ltd.), a polyurea polymer or a radical polymer Curing agent (described in Japanese Patent Nos. 3031897 and 3199818), a latent curing agent obtained by dispersing and curing a thermal curing agent such as modified imidazole in an epoxy resin and pulverizing (Asahi Kasei E-material) "Novacure HXA3792" and "HXA3932HP"), high thermoplasticity A latent curing agent dispersed in and contained therein (described in Japanese Patent No. 3098061), and an imidazole latent curing agent coated with a tetrakisphenol compound (for example, “TEP-2E4MZ manufactured by Nippon Soda Co., Ltd.) And “HIPA-2E4MZ”) and the like. Latent curing agents other than these may be used.
　加温された際の粘度変化をより一層小さくし、ポットライフをより一層長くする観点からは、潜在性硬化剤（Ｅ）はジシアンジアミドであることが好ましい。加温された際の粘度変化をさらに一層小さくし、ポットライフをさらに一層長くする観点からは、潜在性硬化剤（Ｅ）は、ジシアンジアミド粒子であるか、又はジシアンジアミドと、該ジシアンジアミドと反応しうる官能基を有する官能基含有化合物とを反応させた反応粘稠物（Ｅ１）であることが好ましい。上記反応粘稠物（Ｄ）の好ましい一例として、ジシアンジアミドの活性水素の一部に環状エーテル基を有する化合物の環状エーテル基を反応させた反応物が挙げられる。 The latent curing agent (E) is preferably dicyandiamide from the viewpoint of further reducing the viscosity change when heated and further extending the pot life. The latent curing agent (E) is dicyandiamide particles or can react with the dicyandiamide from the viewpoint of further reducing the viscosity change when heated and further increasing the pot life. A reaction viscous product (E1) obtained by reacting a functional group-containing compound having a functional group is preferable. A preferable example of the reaction viscous product (D) is a reaction product obtained by reacting a cyclic ether group of a compound having a cyclic ether group with a part of active hydrogen of dicyandiamide.
　ジシアンジアミド粒子の沈降やノズル詰まりを防止するため、ジシアンジアミドをあらかじめ環状エーテル基を有する化合物と反応させ、組成物中に溶解させてもよい。この場合でも、組成物のポットライフは良好である。潜在性硬化剤（Ｅ）は、ジシアンジアミドと、該ジシアンジアミドと反応しうる官能基を有する官能基含有化合物とを反応させた反応粘稠物（Ｅ１）であることが特に好ましい。このような反応粘稠物（Ｅ１）の使用により、硬化物による絶縁信頼性を高くすることができる。さらに、上記硬化性組成物は５０℃以上に加温されても粘度が変化し難くなり、ポットライフが長くなる。 In order to prevent sedimentation of dicyandiamide particles and nozzle clogging, dicyandiamide may be reacted with a compound having a cyclic ether group in advance and dissolved in the composition. Even in this case, the pot life of the composition is good. The latent curing agent (E) is particularly preferably a reaction viscous product (E1) obtained by reacting dicyandiamide with a functional group-containing compound having a functional group capable of reacting with the dicyandiamide. By using such a reaction viscous material (E1), the insulation reliability by hardened | cured material can be made high. Furthermore, even if the said curable composition is heated above 50 degreeC, a viscosity will become difficult to change and a pot life will become long.
　なお、上記反応粘稠物（Ｅ１）は、インクジェット用硬化性組成物に用いる前に反応粘稠物（Ｅ１）単独で粘稠な性状を有していればよく、インクジェット用硬化性組成物中では粘稠でなくてもよい。また、インクジェット用硬化性組成物から上記反応粘稠物（Ｅ１）を取り出したときに、該反応粘稠物（Ｅ１）が粘稠であってもよい。 In addition, the said reaction viscous material (E1) should just have a viscous property only by the reaction viscous material (E1), before using it for the curable composition for inkjet, In curable composition for inkjets Then it does not have to be viscous. Moreover, when the said reaction viscous material (E1) is taken out from the curable composition for inkjet, this reaction viscous material (E1) may be viscous.
　常温（２３℃）で固体であるジシアンジアミド（ジシアンジアミド粒子）は、液状成分中に固体で存在するために、保管中に沈降したり、インクジェットヘッドのノズル詰まりを引き起こしたりする可能性がある。このような問題点を解消するために、ジシアンジアミドをあらかじめ、該ジシアンジアミドと反応しうる官能基を有する官能基含有化合物と反応させ、反応粘稠物（Ｅ１）を作製し、組成物中に添加することが好ましい。すなわち、本発明に係るインクジェット用硬化性組成物では、ジシアンジアミドと、該ジシアンジアミドと反応しうる官能基を有する官能基含有化合物とを反応させた反応粘稠物（Ｅ１）を潜在性硬化剤（Ｅ）として用いることが好ましい。この反応粘稠物（Ｅ１）を用いれば、組成物のポットライフ及び硬化物による絶縁信頼性が良好になる。 Since dicyandiamide (dicyandiamide particles) that is solid at room temperature (23 ° C.) exists as a solid in the liquid component, it may settle during storage or cause nozzle clogging of the inkjet head. In order to solve such problems, dicyandiamide is reacted in advance with a functional group-containing compound having a functional group capable of reacting with dicyandiamide to prepare a reaction viscous product (E1) and added to the composition. It is preferable. That is, in the curable composition for inkjet according to the present invention, a reaction viscous product (E1) obtained by reacting dicyandiamide and a functional group-containing compound having a functional group capable of reacting with the dicyandiamide is used as a latent curing agent (E ) Is preferably used. If this reaction viscous material (E1) is used, the insulation reliability by the pot life and hardened | cured material of a composition will become favorable.
　上記インクジェット用硬化性組成物中に配合される前の上記反応粘稠物（Ｅ１）には、有機溶剤に配合されていないか、又は有機溶剤に配合されておりかつ上記反応粘稠物（Ｅ１）１００重量部に対して配合されている有機溶剤の量が１００重量部以下であることが好ましい。上記反応粘稠物（Ｅ１）が有機溶剤に配合されている場合には、上記反応粘稠物（Ｅ１）１００重量部に対して配合されている有機溶剤の量は５０重量部以下であることが好ましく、２０重量部以下であることがより好ましく、１０重量部以下であることが更に好ましく、１重量部以下であることが特に好ましい。 The reaction viscous product (E1) before blended in the curable composition for inkjet is not blended in an organic solvent or blended in an organic solvent and the reaction viscous product (E1). ) The amount of the organic solvent blended with respect to 100 parts by weight is preferably 100 parts by weight or less. When the said reaction viscous material (E1) is mix | blended with the organic solvent, the quantity of the organic solvent mix | blended with respect to 100 weight part of the said reaction viscous material (E1) shall be 50 weight part or less. Is preferably 20 parts by weight or less, more preferably 10 parts by weight or less, and particularly preferably 1 part by weight or less.
　上記反応粘稠物（Ｅ１）は、ジシアンジアミドの活性水素の一部に、上記官能基含有化合物を反応させた反応物であることが好ましい。上記官能基含有化合物のジシアンジアミドと反応しうる官能基は、一般にジシアンジアミドの活性水素の一部と反応する。 The reaction viscous product (E1) is preferably a reaction product obtained by reacting the functional group-containing compound with a part of the active hydrogen of dicyandiamide. The functional group capable of reacting with the dicyandiamide of the functional group-containing compound generally reacts with a part of the active hydrogen of dicyandiamide.
　上記官能基含有化合物と反応される上記ジシアンジアミドは粉末状であることが好ましい。粉末状のジシアンジアミドを上記官能基含有化合物と反応させることにより、粉末状ではなくなり、粘稠な上記反応粘稠物（Ｅ１）が得られる。 The dicyandiamide to be reacted with the functional group-containing compound is preferably in a powder form. By reacting powdery dicyandiamide with the functional group-containing compound, the powdery dicyandiamide is not powdered and the viscous reaction viscous product (E1) is obtained.
　上記反応粘稠物（Ｅ１）を容易に合成し、更にポットライフが長い硬化性組成物を得る観点からは、上記ジシアンジアミドと反応される上記官能基含有化合物は、水酸基、環状エーテル基、カルボキシル基及びイソシアネート基からなる群から選択された少なくとも１種の官能基を有することが好ましい。 From the viewpoint of easily synthesizing the reaction viscous product (E1) and obtaining a curable composition having a long pot life, the functional group-containing compound reacted with the dicyandiamide is a hydroxyl group, a cyclic ether group, or a carboxyl group. And at least one functional group selected from the group consisting of isocyanate groups.
　上記反応粘稠物（Ｅ１）を容易に合成し、更にポットライフが長い硬化性組成物を得る観点からは、上記ジシアンジアミドと反応される上記官能基含有化合物は、環状エーテル基を有する化合物であることが好ましい。ジシアンジアミドと反応される該環状エーテル基を有する化合物は、環状エーテル基を１個有する化合物であることが好ましい。 From the viewpoint of easily synthesizing the reaction viscous product (E1) and obtaining a curable composition having a long pot life, the functional group-containing compound reacted with the dicyandiamide is a compound having a cyclic ether group. It is preferable. The compound having the cyclic ether group to be reacted with dicyandiamide is preferably a compound having one cyclic ether group.
　上記反応粘稠物（Ｅ１）を容易に合成し、更にポットライフが長い硬化性組成物を得る観点からは、上記ジシアンジアミドと反応される上記官能基含有化合物は、エポキシ基を有する化合物であることが好ましい。ジシアンジアミドと反応される該エポキシ基を有する化合物は、エポキシ基を１個有する化合物であることが好ましい。 From the viewpoint of easily synthesizing the reaction viscous material (E1) and obtaining a curable composition having a long pot life, the functional group-containing compound reacted with the dicyandiamide is a compound having an epoxy group. Is preferred. The compound having an epoxy group to be reacted with dicyandiamide is preferably a compound having one epoxy group.
　上記反応粘稠物（Ｅ１）を容易に合成し、更にポットライフが長いインクジェット用硬化性組成物を得る観点からは、更に硬化性組成物の硬化物の耐熱性をより一層高める観点からは、上記ジシアンジアミドと反応される官能基含有化合物は、芳香族骨格を有することが好ましく、芳香族骨格と環状エーテル基とを有する化合物であることがより好ましく、芳香族骨格とエポキシ基とを有する化合物であることが特に好ましい。 From the viewpoint of easily synthesizing the reaction viscous product (E1) and obtaining a curable composition for inkjet having a longer pot life, from the viewpoint of further improving the heat resistance of the cured product of the curable composition, The functional group-containing compound to be reacted with the dicyandiamide preferably has an aromatic skeleton, more preferably a compound having an aromatic skeleton and a cyclic ether group, and a compound having an aromatic skeleton and an epoxy group. It is particularly preferred.
　上記官能基含有化合物の具体例としては、フェニルグリシジルエーテル、ブチルグリシジルエーテル、オルトクレジルグリシジルエーテル、メタクレジルグリシジルエーテル、パラクレジルグリシジルエーテル、アリルグリシジルエーテル、パラｔ－ブチルフェニルグリシジルエーテルなどのグリシジルエーテル類や、グリシジル（メタ）アクリレート、及び３，４－エポキシシクロヘキシルメチル（メタ）アクリレートなどが挙げられる。 Specific examples of the functional group-containing compound include phenyl glycidyl ether, butyl glycidyl ether, ortho-cresyl glycidyl ether, meta-cresyl glycidyl ether, para-cresyl glycidyl ether, allyl glycidyl ether, para-t-butylphenyl glycidyl ether, etc. Examples thereof include glycidyl ethers, glycidyl (meth) acrylate, and 3,4-epoxycyclohexylmethyl (meth) acrylate.
　硬化物の耐熱性をより一層高める観点からは、上記官能基含有化合物は、芳香環を有するフェニルグリシジルエーテル、オルトクレジルグリシジルエーテル、メタクレジルグリシジルエーテル、パラクレジルグリシジルエーテル又はパラｔ－ブチルフェニルグリシジルエーテルであることが好ましい。 From the viewpoint of further increasing the heat resistance of the cured product, the functional group-containing compound is an aromatic ring-containing phenyl glycidyl ether, ortho-cresyl glycidyl ether, meta-cresyl glycidyl ether, para-cresyl glycidyl ether, or para-t-butyl. Preference is given to phenylglycidyl ether.
　上記ジシアンジアミドと上記官能基含有化合物との反応において、ジシアンジアミド１モルに対し、上記官能基含有化合物を好ましくは０．２モル以上、より好ましくは１モル以上、好ましくは４モル以下、より好ましくは３モル以下反応させることが望ましい。すなわち、上記反応粘稠物（Ｅ１）は、上記ジシアンジアミド１モルに対して、上記官能基含有化合物を好ましくは０．２モル以上、より好ましくは１モル以上、好ましくは４モル以下、より好ましくは３モル以下反応させた反応粘稠物であることが望ましい。ポットライフにより一層優れた硬化性組成物を得る観点からは、上記反応粘稠物（Ｅ１）は、上記ジシアンジアミド１モルに対して、上記官能基含有化合物を１モル以上、３モル以下反応させた反応粘稠物であることが特に望ましい。上記官能基含有化合物の使用量が上記下限未満であると、未反応のジシアンジアミドが析出するおそれがある。上記官能基含有化合物の使用量が上記上限を超えると、上記反応粘稠物の活性水素がすべて失活し、環状エーテル基含有化合物（Ｂ）を硬化させることができなくなるおそれがある。なお、この反応では、必要に応じて溶媒又は反応促進剤の存在下、６０℃から１４０℃で反応させることが好ましい。 In the reaction between the dicyandiamide and the functional group-containing compound, the functional group-containing compound is preferably 0.2 mol or more, more preferably 1 mol or more, preferably 4 mol or less, more preferably 3 mol per mol of dicyandiamide. It is desirable to make it react below mol. That is, the reaction viscous product (E1) is preferably 0.2 mol or more, more preferably 1 mol or more, preferably 4 mol or less, more preferably 1 mol or more of the functional group-containing compound with respect to 1 mol of the dicyandiamide. It is desirable that it is a reaction viscous product obtained by reacting 3 mol or less. From the viewpoint of obtaining a more excellent curable composition by pot life, the reaction viscous product (E1) was reacted with 1 to 3 mol of the functional group-containing compound with respect to 1 mol of the dicyandiamide. A reaction viscous product is particularly desirable. There exists a possibility that unreacted dicyandiamide may precipitate that the usage-amount of the said functional group containing compound is less than the said minimum. When the usage-amount of the said functional group containing compound exceeds the said upper limit, there exists a possibility that all the active hydrogens of the said reaction viscous substance may deactivate, and it becomes impossible to harden a cyclic ether group containing compound (B). In addition, in this reaction, it is preferable to make it react at 60 to 140 degreeC in presence of a solvent or a reaction accelerator as needed.
　上記ジシアンジアミドと上記官能基含有化合物との反応時に、ジシアンジアミドを溶解させるために溶剤を用いてもよい。該溶剤は、ジシアンジアミドを溶解させることが可能な溶剤であればよい。使用可能な溶剤としては、アセトン、メチルエチルケトン、ジメチルホルムアミド及びメチルセロソルブ等が挙げられる。 In the reaction of the dicyandiamide with the functional group-containing compound, a solvent may be used to dissolve the dicyandiamide. The solvent may be any solvent that can dissolve dicyandiamide. Usable solvents include acetone, methyl ethyl ketone, dimethylformamide, methyl cellosolve and the like.
　上記ジシアンジアミドと上記官能基含有化合物との反応を促進するため、反応促進剤を用いてもよい。反応促進剤として、フェノール類、アミン類、イミダゾール類及びトリフェニルフォスフィンなどの公知慣用の反応促進剤を使用できる。 In order to promote the reaction between the dicyandiamide and the functional group-containing compound, a reaction accelerator may be used. Known reaction accelerators such as phenols, amines, imidazoles, and triphenylphosphine can be used as the reaction accelerator.
　ポットライフの低下を抑制し、かつ硬化むらを抑制する観点からは、本発明に係るインクジェット用硬化性組成物では、上記反応粘稠物（Ｅ１）は、環状エーテル基含有化合物（Ｂ）と相溶していることが好ましく、（メタ）アクリロイル基含有化合物（Ａ）と相溶していることが好ましく、光反応性化合物（Ｃ）と相溶していることが好ましく、更に硬化性組成物中に溶解していることが好ましい。 From the viewpoint of suppressing pot life reduction and curing unevenness, in the curable composition for inkjet according to the present invention, the reaction viscous product (E1) is in phase with the cyclic ether group-containing compound (B). It is preferably dissolved, preferably compatible with the (meth) acryloyl group-containing compound (A), preferably compatible with the photoreactive compound (C), and further a curable composition. It is preferable that it is dissolved therein.
　上記反応粘稠物（Ｅ１）は、環状エーテル基含有化合物（Ｂ）と相溶可能であることが好ましく、（メタ）アクリロイル基含有化合物（Ａ）と相溶可能であることが好ましく、光反応性化合物（Ｃ）と相溶可能であることが好ましい。 The reaction viscous product (E1) is preferably compatible with the cyclic ether group-containing compound (B), preferably compatible with the (meth) acryloyl group-containing compound (A), and photoreactive. It is preferable that it is compatible with the functional compound (C).
　上記反応粘稠物（Ｅ１）は、例えば、粉末状のジシアンジアミドと上記官能基含有化合物との反応により得られた非粉末状の反応粘稠物である。インクジェット吐出性をより一層高める観点からは、上記反応粘稠物（Ｅ１）は、固体ではないことが好ましく、結晶ではないことが好ましく、結晶性固体ではないことが好ましい。上記反応粘稠物（Ｅ１）は、液状又は半固形状であることが好ましい。 The reaction viscous material (E1) is, for example, a non-powdered reaction viscous material obtained by a reaction between powdery dicyandiamide and the functional group-containing compound. From the viewpoint of further improving the inkjet dischargeability, the reaction viscous material (E1) is preferably not a solid, preferably not a crystal, and preferably not a crystalline solid. The reaction viscous product (E1) is preferably liquid or semi-solid.
　上記反応粘稠物（Ｅ１）は、透明又は半透明であることが好ましい。上記反応粘稠物（Ｅ１）が透明又は半透明であるか否かは、厚み５ｍｍの上記反応粘稠物（Ｅ１）を介して物体をみたときに、該物体が視認可能であるか否かで判断できる。 The reaction viscous material (E1) is preferably transparent or translucent. Whether or not the reaction viscous material (E1) is transparent or translucent is whether or not the object is visible when the object is viewed through the reaction viscous material (E1) having a thickness of 5 mm. Can be judged.
　環状エーテル基含有化合物（Ｂ）と潜在性硬化剤（Ｅ）との配合比率は特に限定されない。環状エーテル基含有化合物（Ｂ）１００重量部に対して、潜在性硬化剤（Ｅ）の含有量は、好ましくは１重量部以上、より好ましくは３重量部以上、好ましくは５０重量部以下、より好ましくは４０重量部以下である。 The compounding ratio of the cyclic ether group-containing compound (B) and the latent curing agent (E) is not particularly limited. The content of the latent curing agent (E) is preferably 1 part by weight or more, more preferably 3 parts by weight or more, preferably 50 parts by weight or less, relative to 100 parts by weight of the cyclic ether group-containing compound (B). The amount is preferably 40 parts by weight or less.
　［他の成分］
　本発明に係るインクジェット用硬化性組成物は、潜在性硬化剤（Ｅ）とともに、潜在性硬化剤（Ｅ）以外の熱硬化剤を含んでいてもよい。さらに、本発明に係るインクジェット用硬化性組成物は、硬化促進剤を含んでいてもよい。 [Other ingredients]
The curable composition for inkjet according to the present invention may contain a thermal curing agent other than the latent curing agent (E) together with the latent curing agent (E). Furthermore, the curable composition for inkjet according to the present invention may contain a curing accelerator.
　上記熱硬化剤の具体例としては、有機酸、アミン化合物、アミド化合物、ヒドラジド化合物、イミダゾール化合物、イミダゾリン化合物、フェノール化合物、ユリア化合物、ポリスルフィッド化合物及び酸無水物等が挙げられる。上記熱硬化剤として、アミン－エポキシアダクトなどの変性ポリアミン化合物を用いてもよい。 Specific examples of the thermosetting agent include organic acids, amine compounds, amide compounds, hydrazide compounds, imidazole compounds, imidazoline compounds, phenol compounds, urea compounds, polysulfide compounds, and acid anhydrides. A modified polyamine compound such as an amine-epoxy adduct may be used as the thermosetting agent.
　上記硬化促進剤としては、第三級アミン、イミダゾール、第四級アンモニウム塩、第四級ホスホニウム塩、有機金属塩、リン化合物及び尿素系化合物等が挙げられる。 Examples of the curing accelerator include tertiary amines, imidazoles, quaternary ammonium salts, quaternary phosphonium salts, organometallic salts, phosphorus compounds, urea compounds, and the like.
　本発明に係るインクジェット用硬化性組成物は、粘度を調整する目的などにより、必要に応じて、溶剤を含んでいてもよい。該溶剤としては、硬化性組成物中の成分と反応しない溶剤であることが好ましい。硬化性組成物の硬化反応を行う前にオーブン又はホットプレートでの加熱、並びに減圧チャンバー内での減圧により乾燥除去することが可能であるため、揮発性の溶剤が好ましい。また、本発明に係るインクジェット用硬化性組成物は、少量であれば有機溶剤を含んでいてもよい。 The curable composition for inkjet according to the present invention may contain a solvent, if necessary, for the purpose of adjusting the viscosity. The solvent is preferably a solvent that does not react with the components in the curable composition. A volatile solvent is preferred because it can be removed by drying with heating in an oven or hot plate and reduced pressure in a vacuum chamber before the curing reaction of the curable composition. Moreover, the curable composition for inkjet according to the present invention may contain an organic solvent as long as the amount is small.
　本発明に係るインクジェット用硬化性組成物には、本発明の目的を阻害しない範囲で種々の添加剤を配合してもよい。該添加剤としては特に限定されず、着色剤、重合禁止剤、消泡剤、レベリング剤及び密着性付与剤等が挙げられる。 In the curable composition for inkjet according to the present invention, various additives may be blended as long as the object of the present invention is not impaired. The additive is not particularly limited, and examples thereof include a colorant, a polymerization inhibitor, an antifoaming agent, a leveling agent, and an adhesion imparting agent.
　上記着色剤としては、フタロシアニン・ブルー、フタロシアニン・グリーン、アイオジン・グリーン、ジスアゾイエロー、クリスタルバイオレット、酸化チタン、カーボンブラック及びナフタレンブラック等が挙げられる。上記重合禁止剤としては、ハイドロキノン、ハイドロキノンモノメチルエーテル、ｔｅｒｔ－ブチルカテコール、ピロガロール及びフェノチアジン等が挙げられる。上記消泡剤としては、シリコーン系消泡剤、フッ素系消泡剤及び高分子系消泡剤等が挙げられる。上記レベリング剤としては、シリコーン系レベリング剤、フッ素系レベリング剤及び高分子系レベリング剤等が挙げられる。上記密着性付与剤としては、イミダゾール系密着性付与剤、チアゾール系密着性付与剤、トリアゾール系密着性付与剤及びシランカップリング剤が挙げられる。 Examples of the colorant include phthalocyanine / blue, phthalocyanine / green, iodin / green, disazo yellow, crystal violet, titanium oxide, carbon black and naphthalene black. Examples of the polymerization inhibitor include hydroquinone, hydroquinone monomethyl ether, tert-butylcatechol, pyrogallol and phenothiazine. Examples of the antifoaming agent include silicone-based antifoaming agents, fluorine-based antifoaming agents, and polymer-based antifoaming agents. Examples of the leveling agent include silicone leveling agents, fluorine leveling agents, and polymer leveling agents. Examples of the adhesion imparting agent include imidazole adhesion imparting agents, thiazole adhesion imparting agents, triazole adhesion imparting agents, and silane coupling agents.
　本発明に係るインクジェット用硬化性組成物においては、ＪＩＳ　Ｋ２２８３に準拠して測定された２５℃での粘度が１６０ｍＰａ・ｓ以上、１２００ｍＰａ・ｓ以下であることが好ましい。インクジェット用硬化性組成物の粘度が上記下限以上及び上記上限以下であると、インクジェット用硬化性組成物をインクジェットヘッドから容易にかつ精度よく吐出できる。さらに、インクジェット用硬化性組成物が５０℃以上に加温されても、該組成物をインクジェットヘッドから容易にかつ精度よく吐出できる。 In the curable composition for inkjet according to the present invention, the viscosity at 25 ° C. measured in accordance with JIS K2283 is preferably 160 mPa · s or more and 1200 mPa · s or less. When the viscosity of the curable composition for inkjet is not less than the above lower limit and not more than the above upper limit, the curable composition for inkjet can be easily and accurately discharged from the inkjet head. Furthermore, even when the curable composition for inkjet is heated to 50 ° C. or higher, the composition can be easily and accurately discharged from the inkjet head.
　上記粘度は、より好ましくは１０００ｍＰａ・ｓ以下、更に好ましくは５００ｍＰａ・ｓ以下である。上記粘度が好ましい上記上限を満足すると、上記硬化性組成物をヘッドから連続吐出したときに、吐出性がより一層良好になる。また、上記硬化性組成物の濡れ拡がりをより一層抑制し、硬化物層を形成する際の解像度をより一層高める観点からは、上記粘度は好ましくは５００ｍＰａ・ｓを超える。 The viscosity is more preferably 1000 mPa · s or less, and still more preferably 500 mPa · s or less. When the above viscosity satisfies the above preferable upper limit, when the curable composition is continuously ejected from the head, the ejectability becomes even better. From the viewpoint of further suppressing the wetting and spreading of the curable composition and further increasing the resolution when forming the cured product layer, the viscosity is preferably more than 500 mPa · s.
　本発明に係るインクジェット用硬化性組成物は、有機溶剤を含まないか、又は有機溶剤を含みかつ上記硬化性組成物１００重量％中の上記有機溶剤の含有量は５０重量％以下であることが好ましい。上記硬化性組成物１００重量％中、上記有機溶剤の含有量はより好ましくは２０重量％以下、更に好ましくは１０重量％以下、特に好ましくは１重量％以下である。上記有機溶剤の含有量が少ないほど、硬化物層を形成する際の解像度がより一層良好になる。 The curable composition for inkjet according to the present invention does not contain an organic solvent, or contains an organic solvent, and the content of the organic solvent in 100% by weight of the curable composition is 50% by weight or less. preferable. In 100% by weight of the curable composition, the content of the organic solvent is more preferably 20% by weight or less, still more preferably 10% by weight or less, and particularly preferably 1% by weight or less. The smaller the content of the organic solvent, the better the resolution when forming the cured product layer.
　本発明に係るインクジェット用硬化性組成物は、有機溶剤を含まないか、又は有機溶剤を含みかつ上記反応粘稠物（Ｅ１）１００重量部に対して上記有機溶剤の含有量は５０重量部以下であることが好ましい。上記反応粘稠物（Ｅ１）１００重量部に対して、上記有機溶剤の含有量はより好ましくは２０重量部以下、更に好ましくは１０重量部以下、特に好ましくは１重量部以下である。上記有機溶剤の含有量が少ないほど、硬化物層を形成する際の解像度がより一層良好になる。 The curable composition for inkjet according to the present invention does not contain an organic solvent or contains an organic solvent, and the content of the organic solvent is 50 parts by weight or less with respect to 100 parts by weight of the reaction viscous material (E1). It is preferable that The content of the organic solvent is more preferably 20 parts by weight or less, still more preferably 10 parts by weight or less, and particularly preferably 1 part by weight or less with respect to 100 parts by weight of the reaction viscous product (E1). The smaller the content of the organic solvent, the better the resolution when forming the cured product layer.
　（電子部品の製造方法）
　次に、本発明に係る電子部品の製造方法について説明する。 (Method for manufacturing electronic parts)
Next, a method for manufacturing an electronic component according to the present invention will be described.
　本発明に係る電子部品の製造方法は、上述のインクジェット用硬化性組成物を用いることを特徴とする。すなわち、本発明に係る電子部品の製造方法では、先ず、上記インクジェット用硬化性組成物を、インクジェット方式にて塗工し、パターンを描画する。このとき、上記インクジェット用硬化性組成物を直接描画することが特に好ましい。「直接描画する」とは、マスクを用いずに描画することを意味する。上記電子部品としては、プリント配線板及びタッチパネル部品等が挙げられる。上記電子部品は、配線板であることが好ましく、プリント配線板であることがより好ましい。 The method for producing an electronic component according to the present invention is characterized by using the above-described curable composition for inkjet. That is, in the method for manufacturing an electronic component according to the present invention, first, the curable composition for inkjet is applied by an inkjet method to draw a pattern. At this time, it is particularly preferable to directly draw the curable composition for inkjet. “Direct drawing” means drawing without using a mask. Examples of the electronic component include a printed wiring board and a touch panel component. The electronic component is preferably a wiring board, and more preferably a printed wiring board.
　上記インクジェット用硬化性組成物の塗工には、インクジェットプリンタが用いられる。該インクジェットプリンタは、インクジェットヘッドを有する。インクジェットヘッドはノズルを有する。インクジェット装置は、インクジェット装置内又はインクジェットヘッド内の温度を５０℃以上に加温するための加温部を備えることが好ましい。上記インクジェット用硬化性組成物は、塗工対象部材上に塗工されることが好ましい。上記塗工対象部材としては、基板等が挙げられる。該基板としては、配線等が上面に設けられた基板等が挙げられる。上記インクジェット用硬化性組成物は、プリント基板上に塗工されることが好ましい。 An inkjet printer is used for coating the curable composition for inkjet. The ink jet printer has an ink jet head. The inkjet head has a nozzle. The ink jet device preferably includes a heating unit for heating the temperature in the ink jet device or the ink jet head to 50 ° C. or higher. It is preferable that the said inkjet curable composition is coated on the coating object member. A substrate etc. are mentioned as said coating object member. Examples of the substrate include a substrate having wirings provided on the upper surface. The inkjet curable composition is preferably applied onto a printed circuit board.
　また、本発明に係る電子部品の製造方法により、基板をガラスを主体とする部材に変え、液晶表示装置等の表示装置用のガラス基板を作製することも可能である。具体的には、ガラスの上に、蒸着等の方法によりＩＴＯ等の導電パターンを設け、この導電パターン上に本発明に係る電子部品の製造方法により、インクジェット方式で硬化物層を形成してもよい。この硬化物層上に、導電インク等でパターンを設ければ、硬化物層が絶縁膜となり、ガラス上の導電パターンの中で、所定のパターン間にて電気的接続が得られる。 Further, by the method of manufacturing an electronic component according to the present invention, it is possible to change a substrate to a member mainly composed of glass and to produce a glass substrate for a display device such as a liquid crystal display device. Specifically, a conductive pattern such as ITO is provided on glass by a method such as vapor deposition, and a cured product layer is formed on the conductive pattern by an inkjet method by the method for manufacturing an electronic component according to the present invention. Good. If a pattern is provided on the cured product layer with a conductive ink or the like, the cured product layer becomes an insulating film, and electrical connection is obtained between predetermined patterns in the conductive pattern on the glass.
　次に、パターン状に描画されたインクジェット用硬化性組成物に光を照射及び熱を付与し、硬化させて、硬化物層を形成する。このようにして、硬化物層を有する電子部品を得ることができる。該硬化物層は、絶縁膜であってもよく、レジストパターンであってもよい。該絶縁膜は、パターン状の絶縁膜であってもよい。該硬化物層はレジストパターンであることが好ましい。上記レジストパターンはソルダーレジストパターンであることが好ましい。 Next, light and heat are applied to the curable composition for inkjet drawn in a pattern and cured to form a cured product layer. In this way, an electronic component having a cured product layer can be obtained. The cured product layer may be an insulating film or a resist pattern. The insulating film may be a patterned insulating film. The cured product layer is preferably a resist pattern. The resist pattern is preferably a solder resist pattern.
　本発明に係る電子部品の製造方法は、レジストパターンを有するプリント配線板の製造方法であることが好ましい。上記インクジェット用硬化性組成物を、インクジェット方式にて塗工し、パターン状に描画し、パターン状に描画された上記インクジェット用硬化性組成物に光を照射及び熱を付与し、硬化させて、レジストパターンを形成することが好ましい。 The method for manufacturing an electronic component according to the present invention is preferably a method for manufacturing a printed wiring board having a resist pattern. The inkjet curable composition is applied by an inkjet method, drawn in a pattern, and the inkjet curable composition drawn in a pattern is irradiated with light and heat, cured. It is preferable to form a resist pattern.
　パターン状に描画された上記インクジェット用硬化性組成物に、光を照射することにより一次硬化させ、一次硬化物を得てもよい。これにより描画されたインクジェット用硬化性組成物の濡れ拡がりを抑制することができ、高精度なレジストパターンが形成可能となる。また、光の照射により一次硬化物を得た場合には、一次硬化物に熱を付与することにより本硬化させ、硬化物を得、レジストパターンを形成してもよい。本発明に係るインクジェット用硬化性組成物は、光の照射及び熱の付与により硬化可能である。光硬化と熱硬化とを併用した場合には、耐熱性により一層優れたレジストパターンを形成することができる。熱の付与により硬化させる際の加熱温度は、好ましくは１００℃以上、より好ましくは１２０℃以上、好ましくは２５０℃以下、より好ましくは２００℃以下である。 The ink-jet curable composition drawn in a pattern may be primarily cured by irradiation with light to obtain a primary cured product. Thereby, wetting and spreading of the drawn curable composition for inkjet can be suppressed, and a highly accurate resist pattern can be formed. In addition, when a primary cured product is obtained by light irradiation, the primary cured product may be subjected to main curing by applying heat to obtain a cured product to form a resist pattern. The curable composition for inkjet according to the present invention can be cured by light irradiation and heat application. When photocuring and thermosetting are used in combination, a resist pattern that is more excellent in heat resistance can be formed. The heating temperature for curing by applying heat is preferably 100 ° C. or higher, more preferably 120 ° C. or higher, preferably 250 ° C. or lower, more preferably 200 ° C. or lower.
　上記光の照射は、描画の後に行われてもよく、描画と同時に行われてもよい。例えば、硬化性組成物の吐出と同時又は吐出の直後に光を照射してもよい。このように、描画と同時に光を照射するために、インクジェットヘッドによる描画位置に光照射部分が位置するように光源を配置してもよい。 The light irradiation may be performed after drawing or may be performed simultaneously with drawing. For example, light may be irradiated at the same time as or after the ejection of the curable composition. Thus, in order to irradiate light simultaneously with drawing, the light source may be arranged so that the light irradiation portion is positioned at the drawing position by the inkjet head.
　光を照射するための光源は、照射する光に応じて適宜選択される。該光源としては、ＵＶ－ＬＥＤ、低圧水銀灯、中圧水銀灯、高圧水銀灯、超高圧水銀灯、キセノンランプ及びメタルハライドランプ等が挙げられる。照射される光は、一般に紫外線であり、電子線、α線、β線、γ線、Ｘ線及び中性子線等であってもよい。 The light source for irradiating light is appropriately selected according to the irradiating light. Examples of the light source include a UV-LED, a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, an ultrahigh-pressure mercury lamp, a xenon lamp, and a metal halide lamp. The irradiated light is generally ultraviolet rays, and may be an electron beam, α-ray, β-ray, γ-ray, X-ray, neutron beam, or the like.
　インクジェット用硬化性組成物の塗工時における温度は、インクジェット用硬化性組成物がインクジェットヘッドから吐出できる粘度となる温度であれば特に限定されない。インクジェット用硬化性組成物の塗工時における温度は、好ましくは５０℃以上、より好ましくは６０℃以上、好ましくは１００℃以下である。塗工時におけるインクジェット用硬化性組成物の粘度は、インクジェットヘッドから吐出できる範囲であれば特に限定されない。 The temperature at the time of application of the inkjet curable composition is not particularly limited as long as the inkjet curable composition has a viscosity at which the inkjet curable composition can be discharged from the inkjet head. The temperature at the time of application of the curable composition for inkjet is preferably 50 ° C. or higher, more preferably 60 ° C. or higher, and preferably 100 ° C. or lower. The viscosity of the curable composition for inkjet at the time of coating is not particularly limited as long as it can be discharged from the inkjet head.
　また、印刷時に、基板を冷却するという方法もある。基板を冷却すると、着弾時に硬化性組成物の粘度が上がり、解像度が良くなる。この際には、結露しない程度に冷却をとどめるか、結露しないよう雰囲気の空気を除湿することが好ましい。また、冷却することで、基板が収縮するので、寸法精度を補正してもよい。 There is also a method of cooling the substrate during printing. When the substrate is cooled, the viscosity of the curable composition is increased at the time of landing and the resolution is improved. At this time, it is preferable to keep the cooling to such an extent that no condensation occurs or to dehumidify the air in the atmosphere so as not to cause condensation. Further, since the substrate contracts by cooling, the dimensional accuracy may be corrected.
　本発明に係るインクジェット用硬化性組成物は、潜在性硬化剤（Ｅ）を含むため、例えば、インクジェットヘッドにおいてインクジェット用硬化性組成物を加熱する場合であっても、インクジェット用硬化性組成物のポットライフが十分に長く、安定した吐出が可能である。さらに、インクジェット用硬化性組成物をインクジェット方式による塗工に適した粘度となるまで加熱できるため、本発明に係るインクジェット用硬化性組成物の使用により、プリント配線板などの電子部品を好適に製造することができる。 Since the curable composition for inkjet according to the present invention includes the latent curing agent (E), for example, even when the curable composition for inkjet is heated in an inkjet head, the curable composition for inkjet is used. Pot life is sufficiently long and stable discharge is possible. Furthermore, since the ink-jet curable composition can be heated to a viscosity suitable for coating by the ink-jet method, the use of the ink-jet curable composition according to the present invention suitably produces electronic components such as printed wiring boards. can do.
　以下、実施例及び比較例を挙げて、本発明を具体的に説明する。本発明は、以下の実施例のみに限定されない。 Hereinafter, the present invention will be specifically described with reference to examples and comparative examples. The present invention is not limited only to the following examples.
　（合成例１）
　攪拌器、温度計、滴下ロートを備えた３つ口フラスコに、メチルセロソルブ５０ｇ、ジシアンジアミド１５ｇ、及び２，４－ジアミノ－６－［２’－ウンデシルイミダゾリル－（１’）］－エチル－ｓ－トリアジン１ｇを加え、１００℃に加熱してジシアンジアミドを溶解させた。溶解後、ブチルグリシジルエーテル１３０ｇを滴下ロートから２０分かけて滴下し、１時間反応させた。その後６０℃に温度を下げ、減圧にして溶媒を除去し、黄色及び半透明の反応粘稠物を得た。得られた反応粘稠物は溶媒を含んでいなかった。 (Synthesis Example 1)
In a three-necked flask equipped with a stirrer, thermometer and dropping funnel, 50 g of methyl cellosolve, 15 g of dicyandiamide, and 2,4-diamino-6- [2′-undecylimidazolyl- (1 ′)]-ethyl-s Add 1 g of triazine and heat to 100 ° C. to dissolve dicyandiamide. After dissolution, 130 g of butyl glycidyl ether was added dropwise from the dropping funnel over 20 minutes and reacted for 1 hour. Thereafter, the temperature was lowered to 60 ° C., and the solvent was removed under reduced pressure to obtain a yellow and translucent reaction viscous product. The resulting reaction viscous product did not contain a solvent.
　（合成例２）
　攪拌器、温度計、滴下ロートを備えた３つ口フラスコに、メチルセロソルブ５０ｇ、ジシアンジアミド１５ｇ、及び２，４－ジアミノ－６－［２’－ウンデシルイミダゾリル－（１’）］－エチル－ｓ－トリアジン１ｇを加え、１００℃に加熱してジシアンジアミドを溶解させた。溶解後、オルソクレジルグリシジルエーテル４０ｇを滴下ロートから２０分かけて滴下し、１時間反応させた。その後６０℃に温度を下げ、減圧にして溶媒を除去し、黄色及び半透明の反応粘稠物を得た。得られた反応粘稠物は溶媒を含んでいなかった。 (Synthesis Example 2)
In a three-necked flask equipped with a stirrer, thermometer and dropping funnel, 50 g of methyl cellosolve, 15 g of dicyandiamide, and 2,4-diamino-6- [2′-undecylimidazolyl- (1 ′)]-ethyl-s Add 1 g of triazine and heat to 100 ° C. to dissolve dicyandiamide. After dissolution, 40 g of orthocresyl glycidyl ether was added dropwise from the dropping funnel over 20 minutes and reacted for 1 hour. Thereafter, the temperature was lowered to 60 ° C., and the solvent was removed under reduced pressure to obtain a yellow and translucent reaction viscous product. The resulting reaction viscous product did not contain a solvent.
　（合成例３）
　オルソクレジルグリシジルエーテルの滴下量を４０ｇから９５ｇに変更したこと以外は合成例２と同様にして、黄色及び半透明の反応粘稠物を得た。得られた反応粘稠物は溶媒を含んでいなかった。 (Synthesis Example 3)
A yellow and translucent reaction viscous product was obtained in the same manner as in Synthesis Example 2 except that the dripping amount of orthocresyl glycidyl ether was changed from 40 g to 95 g. The resulting reaction viscous product did not contain a solvent.
　また、下記の光重合開始剤（Ｃ）を用意した。
　Ｉｒｇａｃｕｒｅ　９０７（ＢＡＳＦジャパン社製）：ジメチルアミノ基を有さないα－アミノアルキルフェノン型光ラジカル重合開始剤
　Ｉｒｇａｃｕｒｅ　３６９（ＢＡＳＦジャパン社製）：ジメチルアミノ基を有するα－アミノアルキルフェノン型光ラジカル重合開始剤
　Ｉｒｇａｃｕｒｅ　３７９ＥＧ（ＢＡＳＦジャパン社製）：ジメチルアミノ基を有するα－アミノアルキルフェノン型光ラジカル重合開始剤
　ＴＰＯ（ＢＡＳＦジャパン社製）：アシルフォスフィンオキサイド型光ラジカル重合開始剤
　Ｉｒｇａｃｕｒｅ　１８４（ＢＡＳＦジャパン社製）：α－ヒドロキシアルキルフェノン型光ラジカル重合開始剤 Moreover, the following photoinitiator (C) was prepared.
Irgacure 907 (manufactured by BASF Japan): α-aminoalkylphenone type photoradical polymerization initiator having no dimethylamino group Irgacure 369 (manufactured by BASF Japan): α-aminoalkylphenone type photoradical polymerization having dimethylamino group Initiator Irgacure 379EG (manufactured by BASF Japan): α-aminoalkylphenone type photoradical polymerization initiator having a dimethylamino group TPO (manufactured by BASF Japan): acylphosphine oxide type photoradical polymerization initiator Irgacure 184 (BASF Japan) Manufactured by: α-hydroxyalkylphenone type photo radical polymerization initiator
　（実施例１）
　（メタ）アクリロイル基含有化合物（Ａ）に相当するビスフェノールＡ型エポキシ化合物のエポキシアクリレート（ダイセルサイテック社製「ＥＢＥＣＲＹＬ　３７００」）２５重量部及びジシクロペンテニルアクリレート（日立化成社製「ＦＡ－５１１ＡＳ」）３０重量部と、環状エーテル基含有化合物（Ｂ）に相当するビスフェノールＡ型エポキシ化合物（三菱化学社製「ｊＥＲ８２８」）１５重量部と、光反応性化合物（Ｃ）に相当するトリエチレングリコールジアクリレート１０重量部及びイソボルニルアクリレート１５重量部と、光重合開始剤（Ｄ）に相当するＩｒｇａｃｕｒｅ　９０７（α－アミノアセトフェノン型光ラジカル重合開始剤、ＢＡＳＦジャパン社製）４重量部と、潜在性硬化剤（Ｅ）に相当するジシアンジアミド（ジシアンジアミド粒子、メディアン径：３μｍ、三菱化学社製「ＤＩＣＹ７」）１重量部とを混合し、インクジェット用硬化性組成物を得た。 Example 1
25 parts by weight of an epoxy acrylate of a bisphenol A type epoxy compound corresponding to the (meth) acryloyl group-containing compound (A) (“EBECRYL 3700” manufactured by Daicel Cytec) and dicyclopentenyl acrylate (“FA-511AS” manufactured by Hitachi Chemical Co., Ltd.) 30 parts by weight, 15 parts by weight of a bisphenol A type epoxy compound (“jER828” manufactured by Mitsubishi Chemical Corporation) corresponding to the cyclic ether group-containing compound (B), and triethylene glycol diacrylate corresponding to the photoreactive compound (C) 10 parts by weight and 15 parts by weight of isobornyl acrylate, 4 parts by weight of Irgacure 907 (α-aminoacetophenone type photo radical polymerization initiator, manufactured by BASF Japan) corresponding to the photopolymerization initiator (D), and latent curing Dicyandiamide corresponding to the agent (E) Cyandiamide particles, median diameter: 3 μm, 1 part by weight of “DICY7” manufactured by Mitsubishi Chemical Corporation were mixed to obtain a curable composition for inkjet.
　（実施例２～３０及び比較例１～３）
　配合成分の種類及び配合量を下記の表１～４に示すように変更したこと以外は実施例１と同様にして、インクジェット用硬化性組成物を得た。 (Examples 2 to 30 and Comparative Examples 1 to 3)
A curable composition for inkjet was obtained in the same manner as in Example 1 except that the types and blending amounts of the blending components were changed as shown in Tables 1 to 4 below.
　なお、実施例１８～３０で得られたインクジェット用硬化性組成物では、上記反応粘稠物は、（メタ）アクリロイル基含有化合物と相溶しており、光反応性化合物と相溶しており、かつ環状エーテル基含有化合物と相溶しており、更に硬化性組成物中に溶解していた。 In the curable compositions for ink jets obtained in Examples 18 to 30, the reaction viscous material is compatible with the (meth) acryloyl group-containing compound and is compatible with the photoreactive compound. And was compatible with the cyclic ether group-containing compound and further dissolved in the curable composition.
　（評価）
　（１）粘度
　ＪＩＳ　Ｋ２２８３に準拠して、粘度計（東機産業社製「ＴＶＥ２２Ｌ」）を用いて、得られたインクジェット用硬化性組成物の２５℃での粘度を測定した。インクジェット用硬化性組成物の粘度を下記の判定基準で判定した。 (Evaluation)
(1) Viscosity Based on JIS K2283, the viscosity at 25 degreeC of the obtained curable composition for inkjets was measured using the viscometer ("TVE22L" by the Toki Sangyo company). The viscosity of the curable composition for inkjet was determined according to the following criteria.
　［粘度の判定基準］
　Ａ：粘度が１２００ｍＰａ・ｓを超える
　Ｂ：粘度が１０００ｍＰａ・ｓを超え、１２００ｍＰａ・ｓ以下
　Ｃ：粘度が５００ｍＰａ・ｓを超え、１０００ｍＰａ・ｓ以下
　Ｄ：粘度が１６０ｍＰａ・ｓ以上、５００ｍＰａ・ｓ以下
　Ｅ：粘度が１６０ｍＰａ・ｓ未満 [Criteria for viscosity]
A: Viscosity exceeds 1200 mPa · s B: Viscosity exceeds 1000 mPa · s C: Viscosity exceeds 500 mPa · s, 1000 mPa · s or less D: Viscosity is 160 mPa · s or more, 500 mPa · s or less E: Viscosity is less than 160 mPa · s
　（２）吐出性
　銅配線が上面に設けられたガラスエポキシ基板（１００ｍｍ×１００ｍｍ）を用意した。この基板上にインクジェット用硬化性組成物を、紫外線照射装置付きピエゾ方式インクジェットプリンタのインクジェットヘッドから吐出して、パターン状に描画した。なお、粘度が５００ｍＰａ・ｓ以下であるインクジェット用硬化性組成物の吐出試験時には、ヘッド温度を８０℃とし、粘度が５００ｍＰａ・ｓを超えるインクジェット用硬化性組成物の吐出試験時には、ヘッド温度を９５℃とした。 (2) Dischargeability A glass epoxy substrate (100 mm × 100 mm) provided with copper wiring on the upper surface was prepared. On this board | substrate, the curable composition for inkjet was discharged from the inkjet head of the piezo-type inkjet printer with an ultraviolet irradiation device, and was drawn in pattern shape. In the ejection test of the curable composition for ink jet having a viscosity of 500 mPa · s or less, the head temperature is set to 80 ° C., and in the ejection test of the curable composition for ink jet having a viscosity exceeding 500 mPa · s, the head temperature is set to 95 ° C. C.
　［吐出性の判定基準］
　○○：硬化性組成物をヘッドから１０時間以上連続して吐出可能であった
　○：硬化性組成物をヘッドから１０時間以上連続して吐出可能であるが、１０時間の連続吐出の間にわずかに吐出むらが生じる
　△：硬化性組成物をヘッドから連続して吐出可能であるが、１０時間以上連続して連続して吐出不可能であった
　×：硬化性組成物をヘッドから吐出の初期段階で吐出不可能であった [Ejection criteria]
◯: The curable composition could be continuously discharged from the head for 10 hours or longer. ○: The curable composition could be discharged from the head continuously for 10 hours or longer, but during the continuous discharge of 10 hours. Slight discharge unevenness occurs Δ: The curable composition can be continuously discharged from the head, but cannot be discharged continuously for 10 hours or longer. ×: The curable composition is discharged from the head. Discharge was impossible at the initial stage
　（３）濡れ拡がり
　銅配線が上面に設けられたガラスエポキシ基板（１００ｍｍ×１００ｍｍ）を用意した。この基板上にインクジェット用硬化性組成物を、紫外線照射装置付きピエゾ方式インクジェットプリンタのインクジェットヘッドから吐出して塗工し、ライン（吐出部の幅８０μｍ）とその間のスペース（幅８０μｍ）とのパターン状に描画した。なお、粘度が５００ｍＰａ・ｓ以下であるインクジェット用硬化性組成物の吐出試験時には、ヘッド温度を８０℃とし、粘度が５００ｍＰａ・ｓを超えるインクジェット用硬化性組成物の吐出試験時には、ヘッド温度を９５℃とした。 (3) Wetting and spreading A glass epoxy substrate (100 mm × 100 mm) provided with copper wiring on the upper surface was prepared. A curable composition for inkjet is applied onto this substrate by ejecting it from an inkjet head of a piezo-type inkjet printer with an ultraviolet irradiation device, and a pattern of lines (width of the ejection part 80 μm) and spaces therebetween (width 80 μm). Drawn in a shape. In the ejection test of the curable composition for ink jet having a viscosity of 500 mPa · s or less, the head temperature is set to 80 ° C., and in the ejection test of the curable composition for ink jet having a viscosity exceeding 500 mPa · s, the head temperature is set to 95 ° C. C.
　基板上に塗工されたインクジェット用硬化性組成物（厚み２０μｍ）に波長３６５ｎｍの紫外線を、照射エネルギーが１０００ｍＪ／ｃｍ２となるように照射した。 The curable composition for inkjet (thickness 20 μm) coated on the substrate was irradiated with ultraviolet rays having a wavelength of 365 nm so that the irradiation energy was 1000 mJ / cm 2 .
　紫外線を照射して５分後に、パターンの濡れ拡がりを目視により観察し、濡れ拡がりを下記の基準で判定した。 5 minutes after irradiation with ultraviolet rays, the wet spread of the pattern was visually observed, and the wet spread was determined according to the following criteria.
　［濡れ拡がりの判定基準］
　○○：濡れ拡がりの状態が、狙いのライン幅＋４０μｍ以下
　○：濡れ拡がりの状態が、狙いのライン幅＋４０μｍを超え、７５μｍ以下
　×：描画部分から組成物層が濡れ拡がっており、ライン間の間隔が無くなっているか、又は濡れ拡がりの状態が、狙いのライン幅＋７５μｍを超える [Wetting and spreading criteria]
○○: Wet spread state is the target line width + 40 μm or less ○: Wet spread state exceeds the target line width + 40 μm and 75 μm or less ×: The composition layer is wet spread from the drawing portion, and between the lines The interval is lost or the wet spread condition exceeds the target line width +75 μm.
　（４）貯蔵安定性（ポットライフの長さ）
　５μｍのメンブレンフィルターを用いて、得られたインクジェット用硬化性組成物をろ過し、ろ過したインクジェット用硬化性組成物を８０℃で１２時間加熱した。 (4) Storage stability (pot life length)
The obtained inkjet curable composition was filtered using a 5 μm membrane filter, and the filtered inkjet curable composition was heated at 80 ° C. for 12 hours.
　銅箔が上面に貼り付けられている銅箔付きＦＲ－４基板を用意した。基板上の銅箔上に、インクジェット用硬化性組成物を、紫外線照射装置付きピエゾ方式インクジェットプリンタのインクジェットヘッドから、ラインの幅８０μｍでライン間の間隔が８０μｍとなるように吐出して塗工し、パターン状に描画しようと試みた。このときのインクジェットヘッドからの吐出性から、貯蔵安定性を下記の判定基準で判定した。なお、粘度が５００ｍＰａ・ｓ以下であるインクジェット用硬化性組成物の吐出試験時には、ヘッド温度を８０℃とし、粘度が５００ｍＰａ・ｓを超えるインクジェット用硬化性組成物の吐出試験時には、ヘッド温度を９５℃とした。 An FR-4 substrate with a copper foil having a copper foil attached to the upper surface was prepared. On the copper foil on the substrate, the ink-jet curable composition was applied from the ink-jet head of a piezo-type ink-jet printer with an ultraviolet irradiation device so that the line width was 80 μm and the line-to-line spacing was 80 μm. I tried to draw a pattern. From the ejection properties from the inkjet head at this time, the storage stability was determined according to the following criteria. In the ejection test of the curable composition for ink jet having a viscosity of 500 mPa · s or less, the head temperature is set to 80 ° C., and in the ejection test of the curable composition for ink jet having a viscosity exceeding 500 mPa · s, the head temperature is set to 95 ° C. C.
　［貯蔵安定性の判定基準］
　○：インクジェットヘッドから組成物を吐出できた
　△：吐出前に組成物の硬化が進行しているか、又は組成物の粘度が上昇しており、インクジェットヘッドから組成物を吐出できなかった
　×：組成物がかなり硬化している [Criteria for storage stability]
○: The composition could be ejected from the inkjet head. Δ: The curing of the composition had progressed before ejection or the viscosity of the composition had increased, and the composition could not be ejected from the inkjet head. Things are quite hard
　（５）硬化物膜のむら
　銅箔が上面に貼り付けられている銅箔付きＦＲ－４基板を用意した。この基板を８０℃に加温して、基板上にインクジェット用硬化性組成物を、紫外線照射装置付きピエゾ方式インクジェットプリンタのインクジェットヘッドから、ラインの幅１ｍｍでライン間の間隔が１ｍｍとなるように吐出して塗工し、パターン状に描画した。なお、粘度が５００ｍＰａ・ｓ以下であるインクジェット用硬化性組成物の吐出試験時には、ヘッド温度を８０℃とし、粘度が５００ｍＰａ・ｓを超えるインクジェット用硬化性組成物の吐出試験時には、ヘッド温度を９５℃とした。 (5) Unevenness of cured product film An FR-4 substrate with a copper foil having a copper foil attached to the upper surface was prepared. The substrate is heated to 80 ° C., and the curable composition for inkjet is placed on the substrate from the inkjet head of the piezo inkjet printer with an ultraviolet irradiation device so that the line width is 1 mm and the distance between the lines is 1 mm. It was discharged and applied to draw a pattern. In the ejection test of the curable composition for ink jet having a viscosity of 500 mPa · s or less, the head temperature is set to 80 ° C., and in the ejection test of the curable composition for ink jet having a viscosity exceeding 500 mPa · s, the head temperature is set to 95 ° C. C.
　パターン状に描画されたインクジェット用硬化性組成物（厚み２０μｍ）に波長３６５ｎｍの紫外線を、照射エネルギーが５００ｍＪ／ｃｍ２となるように照射し、次に１５０℃で１時間加熱し、本硬化させ、硬化物であるレジストパターン（硬化物膜）を形成した。 The curable composition for inkjet (thickness 20 μm) drawn in a pattern is irradiated with ultraviolet light having a wavelength of 365 nm so that the irradiation energy is 500 mJ / cm 2, and then heated at 150 ° C. for 1 hour to be fully cured. Then, a resist pattern (cured product film) as a cured product was formed.
　得られた硬化物膜の表面を目視で観察し、硬化物膜にむらがあるか否かを評価した。硬化物膜のむらを下記の判定基準で判定した。 The surface of the obtained cured product film was visually observed to evaluate whether the cured product film was uneven. The unevenness of the cured product film was determined according to the following criteria.
　［硬化物膜のむらの判定基準］
　○○：硬化物膜の表面が均一で、表面が平滑である
　○：硬化物膜の表面にわずかに不均一な部分があるものの、硬化物膜の表面の大部分は均一である
　×：硬化物膜において分離が見られる [Criteria for unevenness of cured film]
○ ○: The surface of the cured product film is uniform and the surface is smooth. ○: The surface of the cured product film has a slightly non-uniform portion, but most of the surface of the cured product film is uniform. Separation is seen in the material membrane
　（６）耐熱性
　銅配線が上面に設けられたガラスエポキシ基板（１００ｍｍ×１００ｍｍ）を用意した。この基板を８０℃に加温して、基板上にインクジェット用硬化性組成物を、紫外線照射装置付きピエゾ方式インクジェットプリンタのインクジェットヘッドから吐出して、全面に塗工した。なお、粘度が５００ｍＰａ・ｓ以下であるインクジェット用硬化性組成物の吐出試験時には、ヘッド温度を８０℃とし、粘度が５００ｍＰａ・ｓを超えるインクジェット用硬化性組成物の吐出試験時には、ヘッド温度を９５℃とした。 (6) Heat resistance A glass epoxy substrate (100 mm × 100 mm) provided with copper wiring on the upper surface was prepared. The substrate was heated to 80 ° C., and the curable composition for inkjet was ejected from the inkjet head of a piezo inkjet printer with an ultraviolet irradiation device, and coated on the entire surface. In the ejection test of the curable composition for ink jet having a viscosity of 500 mPa · s or less, the head temperature is set to 80 ° C., and in the ejection test of the curable composition for ink jet having a viscosity exceeding 500 mPa · s, the head temperature is set to 95 ° C. C.
　基板上に塗工されたインクジェット用硬化性組成物（厚み２０μｍ）に波長３６５ｎｍの紫外線を、照射エネルギーが１０００ｍＪ／ｃｍ２となるように照射し、次に１８０℃で１時間加熱し、本硬化させ、硬化物であるレジストパターンを形成し、試験体を得た。 The curable composition for inkjet (thickness 20 μm) coated on the substrate is irradiated with ultraviolet light having a wavelength of 365 nm so that the irradiation energy becomes 1000 mJ / cm 2, and then heated at 180 ° C. for 1 hour to perform main curing. Then, a resist pattern as a cured product was formed, and a test body was obtained.
　得られた試験体を、２７０℃の条件下で５分間放置した。その後、硬化物の基板に対する密着性をクロスカットテープ試験（ＪＩＳ　５４００　６．１５）で確認し、耐熱性を下記の判定基準で判定した。１ｍｍ間隔で碁盤目に、硬化物に切り込みを１００マス分カッターで作成し、次に切り込み部分を有する硬化物にセロハンテープ（ＪＩＳ　Ｚ１５２２）を十分に貼りつけて、テープの一端を４５度の角度で強く引き剥がして剥離状態を確認した。 The obtained specimen was left for 5 minutes at 270 ° C. Then, the adhesiveness with respect to the board | substrate of hardened | cured material was confirmed by the crosscut tape test (JIS5400 6.15), and heat resistance was determined by the following criteria. Make a cut of 100 squares at 1 mm intervals with a cutter on the cured product, and then apply cellophane tape (JIS Z1522) to the cured product with the incised part, and attach one end of the tape to a 45 degree angle. And peeled off strongly to confirm the peeled state.
　［耐熱性の判定基準］
　○○：硬化物の剥離なし
　○：硬化物の一部が剥離する
　×：硬化物の全部が剥離する [Criteria for heat resistance]
○○: No peeling of the cured product ○: Part of the cured product peels ×: All of the cured product peels
　（７）絶縁信頼性（耐マイグレーション性）
　ＩＰＣ－Ｂ－２５のくし型テストパターンＢを用意した。このくし型テストパターンＢを８０℃に加温して、くし型テストパターンＢの表面の全体を覆うようにインクジェット用硬化性組成物を、紫外線照射装置付きピエゾ方式インクジェットプリンタのインクジェットヘッドから、吐出して塗工した。なお、粘度が５００ｍＰａ・ｓ以下であるインクジェット用硬化性組成物の吐出試験時には、ヘッド温度を８０℃とし、粘度が５００ｍＰａ・ｓを超えるインクジェット用硬化性組成物の吐出試験時には、ヘッド温度を９５℃とした。 (7) Insulation reliability (migration resistance)
IPC-B-25 comb test pattern B was prepared. The comb-type test pattern B is heated to 80 ° C., and the curable composition for inkjet is discharged from the inkjet head of the piezo-type inkjet printer with an ultraviolet irradiation device so as to cover the entire surface of the comb-type test pattern B. And coated. In the ejection test of the curable composition for ink jet having a viscosity of 500 mPa · s or less, the head temperature is set to 80 ° C., and in the ejection test of the curable composition for ink jet having a viscosity exceeding 500 mPa · s, the head temperature is set to 95 ° C. C.
　塗工されたインクジェット用硬化性組成物（厚み２０μｍ）に、高圧水銀灯を用いて、波長３６５ｎｍの紫外線を、照射エネルギーが１０００ｍＪ／ｃｍ２となるように照射した。次に、一次硬化物を１５０℃で６０分間加熱し、本硬化させ、硬化物であるレジストパターンを形成し、テストピースを得た。 The coated curable composition for ink jet (thickness 20 μm) was irradiated with ultraviolet light having a wavelength of 365 nm using a high pressure mercury lamp so that the irradiation energy was 1000 mJ / cm 2 . Next, the primary cured product was heated at 150 ° C. for 60 minutes to be fully cured to form a resist pattern as a cured product, thereby obtaining a test piece.
　得られたテストピースを、８５℃及び相対湿度８５％及び直流５０Ｖを印加した条件で、５００時間加湿試験を行った。加湿試験後の絶縁抵抗を測定し、絶縁信頼性を下記の基準で判定した。 The obtained test piece was subjected to a humidification test for 500 hours under the conditions of applying 85 ° C., 85% relative humidity and 50V direct current. The insulation resistance after the humidification test was measured, and the insulation reliability was judged according to the following criteria.
　［絶縁信頼性の判定基準］
　○：絶縁抵抗が３×１０１０Ω以上
　△：絶縁抵抗が１×１０９以上、３×１０１０未満
　×：絶縁抵抗が１×１０９未満 [Criteria for insulation reliability]
○: Insulation resistance is 3 × 10 10 Ω or more Δ: Insulation resistance is 1 × 10 9 or more and less than 3 × 10 10 ×: Insulation resistance is less than 1 × 10 9
　結果を下記の表１～４に示す。 The results are shown in Tables 1 to 4 below.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000004
　なお、α－アミノアセトフェノン型光重合開始剤を用いた実施例１～１５，１８～３０の硬化性組成物では、α－アミノアセトフェノン型光重合開始剤以外の光重合開始剤を用いた実施例１６，１７の硬化性組成物と比べて、光照射後かつ熱硬化前の一次硬化物の表面のべたつきが少なく、熱硬化時の熱硬化性にも優れており、更に絶縁信頼性の評価結果も良好であった。 In the curable compositions of Examples 1 to 15 and 18 to 30 using an α-aminoacetophenone type photopolymerization initiator, examples using a photopolymerization initiator other than the α-aminoacetophenone type photopolymerization initiator were used. Compared with the curable compositions of Nos. 16 and 17, there is less stickiness of the surface of the primary cured product after light irradiation and before thermosetting, and it is excellent in thermosetting at the time of thermosetting. Was also good.
　また、ジメチルアミノ基を有さないα－アミノアルキルフェノン型光ラジカル重合開始剤を用いた実施例１～７と、α－アミノアルキルフェノン型光ラジカル重合開始剤以外の光ラジカル重合開始剤を用いた実施例１６，１７とでは、絶縁信頼性の評価結果はいずれも「△」であったが、ジメチルアミノ基を有さないα－アミノアルキルフェノン型光ラジカル重合開始剤を用いた実施例１～７における絶縁抵抗の値は、α－アミノアルキルフェノン型光ラジカル重合開始剤以外の光ラジカル重合開始剤を用いた実施例１６，１７における絶縁抵抗の値よりも高かった。 Further, Examples 1 to 7 using an α-aminoalkylphenone type photoradical polymerization initiator having no dimethylamino group and photoradical polymerization initiators other than the α-aminoalkylphenone type photoradical polymerization initiator were used. In Examples 16 and 17, the evaluation results of insulation reliability were both “Δ”, but Example 1 using an α-aminoalkylphenone type photoradical polymerization initiator having no dimethylamino group was used. The values of insulation resistance in ˜7 were higher than those in Examples 16 and 17 using photo radical polymerization initiators other than the α-aminoalkylphenone type photo radical polymerization initiator.
　なお、実施例８，１８，２７では、絶縁信頼性（耐マイグレーション性）の評価結果は、いずれも「○」であったが、実施例２７の絶縁抵抗の値は、実施例８の絶縁抵抗の値よりも高く、更に実施例１８の絶縁抵抗の値よりも高かった。 In Examples 8, 18, and 27, the evaluation results of insulation reliability (migration resistance) were all “◯”, but the insulation resistance value of Example 27 is the insulation resistance of Example 8. The insulation resistance of Example 18 was higher than that of Example 18.
　また、実施例において、下記の耐湿熱性（耐熱性及び耐湿性）の評価を実施した。 Moreover, in the examples, the following evaluation of the heat and moisture resistance (heat resistance and moisture resistance) was performed.
　（８）耐湿熱性（耐熱性及び耐湿性）
　銅配線が上面に設けられたガラスエポキシ基板（１００ｍｍ×１００ｍｍ）を用意した。この基板上にインクジェット用硬化性組成物を、紫外線照射装置付きピエゾ方式インクジェットプリンタのインクジェットヘッドから吐出して、全面に塗工した。なお、粘度が５００ｍＰａ・ｓ以下である硬化性組成物の吐出試験時には、ヘッド温度を８０℃とし、粘度が５００ｍＰａ・ｓを超える硬化性組成物の吐出試験時には、ヘッド温度を９５℃とした。 (8) Moisture and heat resistance (heat resistance and moisture resistance)
A glass epoxy substrate (100 mm × 100 mm) provided with copper wiring on the upper surface was prepared. On this board | substrate, the curable composition for inkjet was discharged from the inkjet head of the piezo-type inkjet printer with an ultraviolet irradiation device, and was coated on the whole surface. The head temperature was set to 80 ° C. during the discharge test of the curable composition having a viscosity of 500 mPa · s or less, and the head temperature was set to 95 ° C. during the discharge test of the curable composition having a viscosity exceeding 500 mPa · s.
　基板上に塗工されたインクジェット用硬化性組成物（厚み２０μｍ）に波長３６５ｎｍの紫外線を、照射エネルギーが１０００ｍＪ／ｃｍ２となるように照射し、次に１８０℃で１時間加熱し、硬化物（厚み２０μｍ）を得た。 The curable composition for inkjet (thickness 20 μm) coated on the substrate is irradiated with ultraviolet light having a wavelength of 365 nm so that the irradiation energy is 1000 mJ / cm 2, and then heated at 180 ° C. for 1 hour to obtain a cured product. (Thickness 20 μm) was obtained.
　得られた基板と硬化物との積層体を１３０℃及び相対湿度８５％ＲＨの条件下で２４時間放置した。その後、硬化物の基板に対する密着性をクロスカットテープ試験（ＪＩＳ　５４００　６．１５）で確認した。１ｍｍ間隔で碁盤目に、硬化物に切り込みを１００マス分カッターで作成し、次に切り込み部分を有する硬化物にセロハンテープ（ＪＩＳ　Ｚ１５２２）を十分に貼りつけて、テープの一端を４５度の角度で強く引き剥がして剥離状態を確認した。 The resulting laminate of the substrate and the cured product was allowed to stand for 24 hours under conditions of 130 ° C. and relative humidity of 85% RH. Thereafter, the adhesion of the cured product to the substrate was confirmed by a cross-cut tape test (JIS 5400 6.15). Make a cut of 100 squares at 1 mm intervals with a cutter on the cured product, and then apply cellophane tape (JIS Z1522) to the cured product with the incised part, and attach one end of the tape to a 45 degree angle. And peeled off strongly to confirm the peeled state.
　この結果、多環骨格を有し、かつ（メタ）アクリロイル基を２個以上有する多官能化合物（Ｃ１－１）を含む実施例３０の硬化性組成物の場合には、テープの剥離時に硬化物が剥離しなかった。多環骨格を有し、かつ（メタ）アクリロイル基を２個以上有する多官能化合物（Ｃ１－１）を含まない実施例１～２９の硬化性組成物の場合には、テープの剥離時に硬化物の一部又は全部が剥離していた。但し、実施例１～２９の硬化性組成物の場合には、テープの剥離前に硬化物は剥離していなかった。 As a result, in the case of the curable composition of Example 30 containing a polyfunctional compound (C1-1) having a polycyclic skeleton and having two or more (meth) acryloyl groups, the cured product was removed when the tape was peeled off. Did not peel. In the case of the curable compositions of Examples 1 to 29 having a polycyclic skeleton and not containing the polyfunctional compound (C1-1) having two or more (meth) acryloyl groups, the cured product at the time of peeling of the tape A part or all of was peeled off. However, in the case of the curable compositions of Examples 1 to 29, the cured product was not peeled off before the tape was peeled off.

Claims (12)

  1. 　インクジェット方式により塗工され、かつ光の照射と熱の付与とにより硬化するインクジェット用硬化性組成物であって、
    　（メタ）アクリロイル基を有し、かつ芳香族骨格を有するか又は不飽和二重結合を脂環式骨格内に含有する脂環式骨格を有する（メタ）アクリロイル基含有化合物と、
    　環状エーテル基を２個以上有し、かつ芳香族骨格を有する環状エーテル基含有化合物と、
    　前記（メタ）アクリロイル基含有化合物以外の光反応性化合物と、
    　光重合開始剤と、
    　潜在性硬化剤とを含む、インクジェット用硬化性組成物。     A curable composition for inkjet which is applied by an inkjet method and is cured by irradiation with light and application of heat,
    A (meth) acryloyl group-containing compound having a (meth) acryloyl group and having an aromatic skeleton or an alicyclic skeleton containing an unsaturated double bond in the alicyclic skeleton;
    A cyclic ether group-containing compound having two or more cyclic ether groups and an aromatic skeleton;
    A photoreactive compound other than the (meth) acryloyl group-containing compound;
    A photopolymerization initiator;
    A curable composition for inkjet, comprising a latent curing agent.
  2. 　ＪＩＳ　Ｋ２２８３に準拠して測定された２５℃での粘度が１００ｍＰａ・ｓ以上、１２００ｍＰａ・ｓ以下である、請求項１に記載のインクジェット用硬化性組成物。 The curable composition for inkjet according to claim 1, wherein the viscosity at 25 ° C measured in accordance with JIS K2283 is 100 mPa · s or more and 1200 mPa · s or less.
  3. 　前記（メタ）アクリロイル基含有化合物と前記環状エーテル基含有化合物と前記光反応性化合物との合計１００重量％中、前記（メタ）アクリロイル基含有化合物の含有量が１０重量％以上である、請求項１又は２に記載のインクジェット用硬化性組成物。 The content of the (meth) acryloyl group-containing compound is 10% by weight or more in a total of 100% by weight of the (meth) acryloyl group-containing compound, the cyclic ether group-containing compound, and the photoreactive compound. The curable composition for inkjet according to 1 or 2.
  4. 　前記潜在性硬化剤が、ジシアンジアミド粒子であるか、又はジシアンジアミドと、該ジシアンジアミドと反応しうる官能基を有する官能基含有化合物とを反応させた反応粘稠物である、請求項１～３のいずれか１項に記載のインクジェット用硬化性組成物。 The latent curing agent is dicyandiamide particles or a reaction viscous product obtained by reacting dicyandiamide with a functional group-containing compound having a functional group capable of reacting with dicyandiamide. The curable composition for inkjet according to claim 1.
  5. 　前記潜在性硬化剤が、ジシアンジアミドと、該ジシアンジアミドと反応しうる官能基を有する官能基含有化合物とを反応させた反応粘稠物である、請求項１～３のいずれか１項に記載のインクジェット用硬化性組成物。 The inkjet according to any one of claims 1 to 3, wherein the latent curing agent is a reaction viscous product obtained by reacting dicyandiamide and a functional group-containing compound having a functional group capable of reacting with the dicyandiamide. Curable composition.
  6. 　前記光重合開始剤が、α－アミノアルキルフェノン型光ラジカル重合開始剤である、請求項１～５のいずれか１項に記載のインクジェット用硬化性組成物。 6. The curable composition for inkjet according to any one of claims 1 to 5, wherein the photopolymerization initiator is an α-aminoalkylphenone type photoradical polymerization initiator.
  7. 　前記光重合開始剤が、ジメチルアミノ基を有するα－アミノアルキルフェノン型光ラジカル重合開始剤である、請求項１～５のいずれか１項に記載のインクジェット用硬化性組成物。 The curable composition for inkjet according to any one of claims 1 to 5, wherein the photopolymerization initiator is an α-aminoalkylphenone type photoradical polymerization initiator having a dimethylamino group.
  8. 　前記光反応性化合物が、多環骨格を有し、かつ（メタ）アクリロイル基を２個以上有する多官能化合物を含む、請求項１～７のいずれか１項に記載のインクジェット用硬化性組成物。 The curable composition for inkjet according to any one of claims 1 to 7, wherein the photoreactive compound includes a polyfunctional compound having a polycyclic skeleton and having two or more (meth) acryloyl groups. .
  9. 　前記光反応性化合物が、多環骨格を有し、かつ（メタ）アクリロイル基を１個有する単官能化合物を含む、請求項１～７のいずれか１項に記載のインクジェット用硬化性組成物。 The curable composition for inkjet according to any one of claims 1 to 7, wherein the photoreactive compound includes a monofunctional compound having a polycyclic skeleton and having one (meth) acryloyl group.
  10. 　前記光反応性化合物が、多環骨格を有し、かつ（メタ）アクリロイル基を２個以上有する多官能化合物と、多環骨格を有し、かつ（メタ）アクリロイル基を１個有する単官能化合物との双方を含む、請求項１～７のいずれか１項に記載のインクジェット用硬化性組成物。 The photoreactive compound has a polycyclic skeleton and a polyfunctional compound having two or more (meth) acryloyl groups, and a monofunctional compound having a polycyclic skeleton and one (meth) acryloyl group The curable composition for inkjet according to any one of claims 1 to 7, comprising both of
  11. 　請求項１～１０のいずれか１項に記載のインクジェット用硬化性組成物を、インクジェット方式にて塗工し、パターン状に描画する工程と、
    　パターン状に描画された前記インクジェット用硬化性組成物に光を照射及び熱を付与し、硬化させて、硬化物層を形成する工程とを備える、電子部品の製造方法。     Applying the inkjet curable composition according to any one of claims 1 to 10 by an inkjet method, and drawing in a pattern;
    A process for producing an electronic component comprising: a step of irradiating light and applying heat to the curable composition for inkjet drawn in a pattern and curing the composition to form a cured product layer.
  12. 　レジストパターンを有する電子部品であるプリント配線板の製造方法であって、
    　前記インクジェット用硬化性組成物を、インクジェット方式にて塗工し、パターン状に描画し、パターン状に描画された前記インクジェット用硬化性組成物に光を照射及び熱を付与し、硬化させて、レジストパターンを形成する、請求項１１に記載の電子部品の製造方法。     A method for manufacturing a printed wiring board, which is an electronic component having a resist pattern,
    The inkjet curable composition is applied by an inkjet method, drawn in a pattern, light is applied to the inkjet curable composition drawn in a pattern and heat is applied, and cured. The method for manufacturing an electronic component according to claim 11, wherein a resist pattern is formed.
PCT/JP2011/071883 2010-09-28 2011-09-26 Curable composition for inkjet applications, and process for manufacturing electronic component WO2012043473A1 (en)

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