WO2010125880A1 - 接着性樹脂組成物並びにこれを用いた積層体及びフレキシブル印刷配線板 - Google Patents
接着性樹脂組成物並びにこれを用いた積層体及びフレキシブル印刷配線板 Download PDFInfo
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- WO2010125880A1 WO2010125880A1 PCT/JP2010/055317 JP2010055317W WO2010125880A1 WO 2010125880 A1 WO2010125880 A1 WO 2010125880A1 JP 2010055317 W JP2010055317 W JP 2010055317W WO 2010125880 A1 WO2010125880 A1 WO 2010125880A1
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- 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
- H05K3/38—Improvement of the adhesion between the insulating substrate and the metal
- H05K3/386—Improvement of the adhesion between the insulating substrate and the metal by the use of an organic polymeric bonding layer, e.g. adhesive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J171/00—Adhesives based on polyethers obtained by reactions forming an ether link in the main chain; Adhesives based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J171/00—Adhesives based on polyethers obtained by reactions forming an ether link in the main chain; Adhesives based on derivatives of such polymers
- C09J171/02—Polyalkylene oxides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/35—Heat-activated
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- 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
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0313—Organic insulating material
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2650/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G2650/28—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterised by the polymer type
- C08G2650/56—Polyhydroxyethers, e.g. phenoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
- C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
- C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
- C08L2666/04—Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/062—Copolymers with monomers not covered by C08L33/06
- C08L33/068—Copolymers with monomers not covered by C08L33/06 containing glycidyl groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2463/00—Presence of epoxy resin
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2471/00—Presence of polyether
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2477/00—Presence of polyamide
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- 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
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0393—Flexible materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2852—Adhesive compositions
- Y10T428/287—Adhesive compositions including epoxy group or epoxy polymer
Definitions
- the present invention relates to an adhesive resin composition suitably used for a flexible printed wiring board such as a flexible copper-clad laminate, particularly an adhesive resin composition that can be used as a one-component type, and a flexible printed wiring board using the same. And a laminate such as an adhesive sheet and a coverlay film.
- a flexible printed wiring board (flexible printed wiring board) is based on an insulating film made of a heat-resistant film such as a polyimide film, and copper foil or the like is bonded to one or both surfaces of this insulating film using an adhesive. It is based on a combined structure.
- thermosetting resins such as epoxy resins that contribute to chemical resistance, heat resistance, and mechanical strength
- acrylonitrile that has the role of high adhesion and flexibility.
- Adhesive compositions mainly composed of reactive rubber such as butadiene rubber have become mainstream.
- a film-type adhesive is obtained by applying and drying an adhesive composition on a release-treated film, and is stored in a semi-cured state (B stage state). For this reason, curing proceeds gradually during storage, and it may be difficult to obtain the desired adhesive strength.
- film-type adhesives for flexible substrates that can improve storage stability and obtain excellent peel strength
- Patent Document 1 Japanese Patent Laid-Open No. 2002-275444
- an epoxy resin an epoxy resin curing agent
- an adhesive composition comprising an epoxy group-containing (meth) acrylic copolymer having an epoxy group-containing repeating unit of 0.5 to 2.7% by weight and having a weight average molecular weight of 100,000 or more.
- the ratio A / B between the total weight A of the epoxy resin and the epoxy resin curing agent and the weight B of the epoxy group-containing (meth) acrylic copolymer is 0.25 to 3.
- Patent Document 2 Japanese Patent Laid-Open No. 2008-816778 discloses a thermosetting resin such as an epoxy resin. And a copolymer containing a monomer having at least two ethylenically polymerizable unsaturated groups such as isoprene, a monomer having an alcoholic hydroxyl group, a styrene derivative or a (meth) acrylic acid derivative Resin compositions have been proposed. It is disclosed that such a copolymer has good compatibility with an epoxy resin and can impart sufficient adhesive strength and toughness to a resin that is generally considered to be hard and brittle.
- Patent Document 3 Japanese Patent Laid-Open No. 2008-308686 discloses a base containing an epoxy resin and a curing agent. There has been proposed an adhesive containing 10 to 100 parts by weight of an epoxidized styrene thermoplastic elastomer in 100 parts by weight of a resin.
- a halogen-based flame retardant has been used for imparting flame retardancy, but from recent non-halogen-based requirements, such as using a phosphorus-containing epoxy resin as an epoxy resin, a phosphorus-based flame retardant, It has been proposed to use a phosphorus-containing resin as the resin.
- Patent Document 4 Japanese Patent Application Laid-Open No. 2004-307627
- an adhesive resin composition for a flexible printed wiring board intended for a film-type adhesive 0 to 15% by weight of an epoxy resin and 10 to 10 of a phosphorus-containing epoxy resin are used.
- a flame retardant adhesive using an acrylic resin having a weight average molecular weight of 500,000 to 1,000,000 obtained by polymerizing 30% by weight of (meth) acrylate monomer containing epoxy group, acrylonitrile and other copolymerizable monomers has been proposed. ing.
- the present invention has been made in view of such circumstances, and the object of the present invention is to provide a one-component adhesive solution that is non-halogen-based and has excellent storage stability. It is in providing the adhesive resin composition which can be performed, a laminated body using the same, and a flexible printed wiring board.
- the adhesive resin composition of the present invention comprises (A) an epoxy resin and / or a phenoxy resin; (B) an epoxy-containing copolymer obtained by copolymerizing an epoxy donor monomer and an ethylenically unsaturated monomer copolymerizable with the monomer. (C) thermoplastic resin; (D) an adhesive resin composition containing a curing agent, wherein the (B) epoxy-containing copolymer has a weight average molecular weight of 5000 to less than 100,000 and an epoxy equivalent. It is 3500 g / eq or less.
- the ethylenically unsaturated monomer unit in the (B) epoxy-containing copolymer is preferably at least one selected from the group consisting of styrene, acrylonitrile, and (meth) acrylic acid esters.
- the content of the component (A) in the resin component contained in the adhesive resin composition is preferably 40 to 70% by mass, and the content of the component (B) is preferably 3 to 25% by mass. .
- the epoxy group donating monomer in the (B) epoxy-containing copolymer is preferably a (meth) acryl glycidyl ester, and the (A) epoxy resin and / or phenoxy resin is a phosphorus-containing epoxy resin and / or phenoxy resin. It is preferable to contain.
- the adhesive resin composition of the present invention preferably further contains a phosphorus-based flame retardant, and the phosphorus content in the resin composition is preferably 3.1 to 4.5% by mass.
- the adhesive resin composition of the present invention is suitably used as a one-component adhesive solution having a content of 5 to 60% by mass of the adhesive resin composition.
- the laminated body which has the contact bonding layer which consists of an adhesive resin composition of the said invention on a base film, and the flexible printed wiring board containing the laminated body are also contained in this invention.
- the adhesive resin composition of the present invention has excellent compatibility with the blended polymer components, it can provide a one-component adhesive solution with excellent storage stability and is non-halogen-based and flame retardant. You can be satisfied.
- FIG. 1 is a graph showing the relationship between the epoxy equivalent (horizontal axis) and peel strength (vertical axis) of the adhesive solution used in the examples.
- the adhesive resin composition of the present invention comprises (A) an epoxy resin and / or a phenoxy resin; (B) an epoxy donor monomer and an ethylenically unsaturated monomer copolymerizable with the monomer, An epoxy-containing copolymer having a weight average molecular weight and an epoxy equivalent; (C) a thermoplastic resin; and (D) a curing agent.
- A an epoxy resin and / or a phenoxy resin
- B an epoxy donor monomer and an ethylenically unsaturated monomer copolymerizable with the monomer, An epoxy-containing copolymer having a weight average molecular weight and an epoxy equivalent
- C a thermoplastic resin
- D a curing agent
- the adhesive resin composition of the present invention contains an epoxy resin and / or a phenoxy resin.
- the epoxy resin used in the present invention may be a resin having at least two epoxy groups in one molecule, such as bisphenol A type epoxy resin, bisphenol F type epoxy resin, glycidyl ether type epoxy resin, glycidyl ester type epoxy resin. Glycidylamine type epoxy resin, novolak type epoxy resin, cresol novolak type epoxy resin, and the like.
- phosphorus-containing epoxy resins and phosphorus-containing phenoxy resins in which phosphorus atoms are bonded to these epoxy resins and phenoxy resins using a reactive phosphorus compound are preferably used.
- the content of the non-halogen flame retardant can be reduced, and as a result, it is possible to prevent a decrease in adhesive strength and mechanical strength due to the flame retardant blending.
- the solubility in solvents and compatibility with other resins tend to deteriorate, so the phosphorus content in epoxy resins and phenoxy resins depends on the epoxy and phenoxy molecules in which phosphorus is incorporated.
- the content is preferably 2 to 6% by mass with respect to the mass of.
- phosphorus-containing epoxy resin and phosphorus-containing phenoxy resin examples include FX289, FX305, ERF001 manufactured by Tohto Kasei, and Epicron EXA9710 manufactured by Dainippon Ink & Chemicals, Inc.
- the weight average molecular weight of the epoxy resin and the phenoxy resin is not particularly limited, but in the epoxy resin, the higher the molecular weight, the worse the solubility in solvents and the compatibility with other resins. Furthermore, since the tendency is strong, it is preferable that the weight average molecular weight of these resins is appropriately determined according to the compatibility with the type used.
- the epoxy resin and phenoxy resin as described above may be used alone or in combination of two or more. Moreover, you may mix and use an epoxy resin and a phenoxy resin. Further, a phosphorus-containing epoxy resin and / or a phosphorus-containing phenoxy resin and an epoxy resin or phenoxy resin that does not contain phosphorus may be mixed and used.
- thermosetting resin other than an epoxy resin for example, a phenol resin, a melamine resin, or an oxazine resin may be added.
- thermosetting resins are added to the total amount of components (A), (B) and (C).
- the amount is preferably 40 to 70% by mass with respect to the amount.
- Epoxy-containing copolymer used in the present invention is a copolymer obtained by copolymerizing an epoxy group-providing monomer and an ethylenically unsaturated monomer copolymerizable with the epoxy-donating monomer. And a copolymer having a weight average molecular weight of 5,000 to less than 100,000 and an epoxy equivalent of 3500 g / eq or less.
- the weight average molecular weight of the epoxy-containing copolymer (B) used in the present invention is 5000 to less than 100,000, preferably 6000 to 80,000, more preferably 8000 to 28000. If the weight average molecular weight is less than 5000, the mechanical strength of the resulting adhesive layer tends to be insufficient. On the other hand, if it is 100,000 or more, since the compatibility is poor, it is difficult to obtain a transparent adhesive solution and the storage stability is not good.
- epoxy-containing copolymer (B) instead of the epoxy-containing copolymer (B), it is generally carried out by blending in the state of a monomer having excellent compatibility and polymerizing by heating. Residual reaction initiators and reaction accelerators are not preferred because of problems in storage stability, such as effects on the properties of the cured product, or reaction that gradually proceeds during storage and gelation. Therefore, it is preferable to use an epoxy-containing copolymer (B) having a weight average molecular weight of 5000 or more that has undergone a certain degree of reaction.
- the epoxy equivalent of the epoxy-containing copolymer (B) is 3500 g / eq or less, preferably 3000 g / eq or less, more preferably 2000 g / eq or less. If it exceeds 3500 g / eq, depending on the molecular weight, the compatibility with the (A) component and the (C) component decreases, and as a result, when dissolved in an organic solvent, An adhesive solution having low storage stability, such as a turbid solution, is obtained. Moreover, even if the adhesive solution separated into two layers is forcibly dispersed and applied, the adhesive strength is insufficient or the variation between products becomes large.
- the lower limit of the epoxy equivalent of the epoxy-containing copolymer (B) is not particularly limited, but the epoxy equivalent of a homopolymer having only an epoxy group donating monomer is usually about 200 to 500 g / eq. In the case of a homopolymer containing only an epoxy group donating monomer, even if the weight average molecular weight is 5000 to 100,000, the effect of improving the adhesive strength by the addition of the component (B) is insufficient, so that the epoxy-containing copolymer (B) It is preferable that the epoxy equivalent of is substantially 200 g / eq or more.
- the epoxy group-providing monomer may be any compound having a copolymerizable unsaturated bond and having an epoxy group in the side chain, but a glycidyl group-containing unsaturated monomer is preferably used.
- glycidyl esters of unsaturated carboxylic acids such as glycidyl acrylate, glycidyl methacrylate, monoglycidyl itaconate, butenetricarboxylic acid monoglycidyl ester
- glycidyl such as vinyl glycidyl ether, allyl glycidyl ether, glycidyloxyethyl vinyl ether
- examples include ethers, among which glycidyl acrylate and glycidyl methacrylate are preferably used.
- Examples of the ethylenically unsaturated monomer copolymerized with the epoxy group donating monomer include styrene, o, m, p-methyl styrene, dimethyl styrene, ethyl styrene, chloro styrene, and other nuclear-substituted styrene, ⁇ -methyl styrene, ⁇ -chloro.
- Styrene monomers such as styrene and styrene derivatives such as ⁇ -chlorostyrene; olefins such as ethylene and propylene; vinyl esters such as vinyl acetate, vinyl propionate and vinyl benzoate; acrylic acid, methacrylic acid, itaconic acid and maleic acid ⁇ , ⁇ unsaturated carboxylic acids or salts thereof such as: methyl (meth) acrylate, ethyl (meth) acrylate, alkyl esters of (meth) acrylic acid such as propyl (meth) acrylate; acrylamide, methacrylamide, etc. Amides; nitriles such as acrylonitrile Can be mentioned. These monomers can be used alone or in combination of two or more.
- monomers selected from the group consisting of styrene monomers, alkyl esters of (meth) acrylic acid, and nitriles are preferably used.
- an epoxy-containing copolymer obtained by copolymerizing an acrylonitrile monomer is preferable because the adhesive strength is improved as compared with an epoxy-containing copolymer containing another ethylenically unsaturated monomer.
- the content of the monomer unit is preferably 1 to 20% by mass, more preferably 1 to 15% by mass.
- a monomer having a reactive functional group such as a carboxyl group-containing monomer, a hydroxyl group-containing monomer, or an amino group-containing monomer
- other resins especially epoxy resins
- a phenoxy resin and a curing reaction may occur, and the pot life of the adhesive solution and the homogeneity of the adhesive solution may be impaired. Therefore, the content of the ethylenically unsaturated monomer having these polar groups is preferably small. .
- the epoxy-containing copolymer used in the present invention is obtained by copolymerizing the above monomers, and may be a random copolymer of an epoxy group donating monomer and an ethylenically unsaturated monomer, or an epoxy group donating monomer. It may be a block copolymer or a graft copolymer in which a segment formed by polymerizing is bonded to a segment formed by polymerizing an ethylenically unsaturated monomer. When two or more types of ethylenically unsaturated monomers are copolymerized, each monomer may be randomly polymerized with an epoxy group donating monomer, and each monomer block is appropriately combined with an epoxy group donating monomer block. A triblock copolymer or a tetrablock copolymer may be used, or a plurality of monomers may be randomly copolymerized in each block.
- an epoxy group donating monomer is used in order to synthesize a polymer in which an epoxy group having an epoxy equivalent of 3500 g / eq or less, preferably 3000 g / eq or less, more preferably 2000 g / eq or less is incorporated at a high concentration. It is desirable because it is easier to polymerize.
- the epoxy-containing copolymer (B) having the above-described structure has a role of imparting adhesive strength and flexibility, and is an epoxy resin and / or phenoxy resin as the component (A), and a component (C). Since it is excellent in compatibility with both thermoplastic resins, a uniform liquid adhesive can be provided. Furthermore, since the hydroxyl group produced by the reaction of the epoxy group in the epoxy-containing copolymer (B) can form a crosslinked structure with the component (A), excellent mechanical properties can be imparted.
- the content rate of the epoxy-containing copolymer (B) in the adhesive resin composition of this invention is not specifically limited,
- the content is preferably 3 to 25% by mass, and more preferably 3 to 20% by mass. If it is less than 3 mass%, the adhesive improvement effect by the epoxy-containing copolymer blending cannot be obtained. On the other hand, if it exceeds 25% by mass, the compatibility with the component (A) and the component (C) is lowered, and as a result, the storage stability and adhesive strength of the adhesive are lowered.
- thermoplastic resin (C) is not particularly limited.
- thermoplastic resins a polyamide resin is preferably used in consideration of compatibility and adhesiveness with the epoxy and / or phenoxy resin (A) and the epoxy-containing copolymer (B).
- thermoplastic resin in which phosphorus is incorporated in a molecule is preferable because it is excellent in flame retardancy, so that the blending amount of the flame retardant can be reduced and a decrease in adhesive strength accompanying the blending of the flame retardant can be prevented.
- examples of commercially available phosphorus-containing thermoplastic resins include Byron 237, 337, 537, 637 and UR3570 manufactured by Toyobo.
- the polyamide resin can be synthesized by a reaction of dicarboxylic acid, diamine, aminocarboxylic acid, lactam, etc., and is not limited to the reaction of one kind of dicarboxylic acid and diamine, but is synthesized using a plurality of dicarboxylic acids and a plurality of diamines. May be.
- dicarboxylic acid examples include terephthalic acid, isophthalic acid, orthophthalic acid, naphthalenedicarboxylic acid (1,5-, 2,5-, 2,6- and 2,7-isomer) acid, biphenyldicarboxylic acid (2,2 '-, 3,3'- and 4,4'-forms), 4,4'-diphenyl ether dicarboxylic acid, 4,4'-diphenylmethane dicarboxylic acid, 4,4'-diphenylsulfone dicarboxylic acid, 1,2-bis (Phenoxy) ethane-4,4'-dicarboxylic acid, 2,5-anthracene dicarboxylic acid (2,5- and 2,6-isomer), phenylene diacetic acid (o-, m- and p-isomer), Phenylenedipropionic acid (o-, m- and p-isomers), phenylmalonic acid, phenylgluco
- Examples of the diamine include hexamethylenediamine, heptamethylenediamine, p-di-aminomethylcyclohexane, bis (p-aminecyclohexyl) methane, m-xylenediamine, and 1,4-bis (3-aminopropoxy).
- Examples include cyclohexane, piperazine, and isophoronediamine.
- Examples of the aminocarboxylic acid include 11-aminoundecanoic acid, 12-aminododecanoic acid, 4-aminomethylbenzoic acid, 4-aminomethylcyclohexanecarboxylic acid, 7-aminoenanthic acid, 9-aminononanoic acid, and the like. .
- lactam examples include ⁇ -caprolactam, ⁇ -laurolactam, ⁇ -pyrrolidone, ⁇ -piperidone and the like.
- polyamides containing dimer acid as a constituent component can be obtained by a conventional polycondensation of dimer acid and diamine.
- dicarboxylic acid such as adipic acid, azelaic acid or sebacic acid other than dimer acid is used as a co-polymer. You may contain as a polymerization component.
- thermoplastic resin those having a glass transition temperature of 70 ° C. or lower are preferably used. This is because if the glass transition temperature is too high, the handleability is lowered. Moreover, when the glass transition temperature is too high, the adhesiveness tends to decrease.
- (D) Curing agent The curing agent only needs to be used as a curing agent for epoxy resins and phenoxy resins.
- Polyamine curing agents, acid anhydride curing agents, boron trifluoride amine complex salts, imidazole curing agents, Aromatic diamine-based curing agents, carboxylic acid-based curing agents, phenol resins, and the like are used.
- polyamine curing agents include aliphatic amine curing agents such as diethylenetriamine and tetraethylenetetramine; alicyclic amine curing agents such as isophoronediamine; aromatic amine curing agents such as diaminodiphenylmethane and phenylenediamine; dicyandiamide Etc.
- the acid anhydride curing agent examples include phthalic anhydride, pyromellitic acid anhydride, trimellitic acid anhydride, hexahydrophthalic anhydride, and the like.
- curing agent is suitably determined according to the epoxy equivalent of the epoxy resin of A component.
- the resin composition of the present invention may further contain a non-halogen flame retardant, preferably a phosphorus flame retardant, in addition to the thermosetting resin, thermoplastic resin, and curing agent.
- a non-halogen flame retardant preferably a phosphorus flame retardant
- Non-halogen flame retardants that can be used in the present invention include phosphoric acid esters, phosphoric acid ester amides, phosphazenes, and phosphorus such as 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide. System compounds. Of these, phosphazene is preferably used from the viewpoint of phosphorus concentration and solubility in a solvent. Phosphazene is a common name for a compound group having a double bond containing phosphorus and nitrogen as constituent elements, and is not particularly limited as long as it is a compound having a phosphazene structure in the molecule. Cyclophosphazenes having a cyclic structure, chain polymers obtained by ring-opening polymerization thereof, and oligomers may be used.
- the adhesiveness decreases as the content increases, so that it is preferably 30 parts by mass or less per 100 parts by mass of the resin.
- metal hydroxides inorganic fillers
- magnesium hydroxide and aluminum hydroxide as non-halogen flame retardants because they cause a decrease in adhesiveness.
- the adhesive composition of the present invention is prepared by blending the components (A) to (D) as described above and, if necessary, a non-halogen flame retardant and other additives. It is preferable to prepare such that the phosphorus content in the resin composition is 3.1 to 4.5% by mass.
- a curing accelerator, a silane coupling agent, a leveling agent, an antifoaming agent, and the like may be appropriately blended.
- the curing accelerator Is added, the pot life as an adhesive is shortened, and the adhesiveness tends to be lowered.
- addition of an inorganic filler has the tendency to reduce adhesiveness and a migration characteristic, it is better not to mix
- the adhesive resin composition of the present invention is usually dissolved in an organic solvent and used as an adhesive solution.
- organic solvent include toluene, methanol, ethanol, isopropanol, acetone, dioxolane, hexane, triethylamine, isobutyl acetate, butyl acetate, ethyl acetate, methyl ethyl ketone (MEK), methyl isobutyl ketone, cellosolve, ethylene glycol, dimethylformamide (DMF), Xylene, N-methylpyrrolidone, etc. can be used.
- the solid content concentration in the adhesive solution is preferably 5 to 60% by mass, more preferably 10 to 50% by mass, although it depends on the coating method.
- the resin component (A), component (B), and component (C) are excellent in compatibility with each other. Even at a high concentration, it is possible to provide a highly adhesive one-component adhesive in which each resin component is uniformly mixed without separation and aggregation.
- the adhesive resin composition of the present invention having the above-described configuration is non-halogen, satisfies UL-94 standard V-0 class and VTM-0 class flame retardancy, and exhibits excellent adhesiveness. Since a solution-type adhesive solution that can be used can be provided, it is useful as an adhesive that is applied to a laminate such as an adhesive sheet or a coverlay or a flexible printed wiring board.
- the adhesive resin composition of the present invention is a transparent solution-type adhesive that does not separate even if left for a long period of time, and is excellent in storage stability. It can be used suitably.
- the flexible printed wiring board is obtained by sticking an insulating film and a metal foil to a plurality of layers with a cured product of the adhesive resin composition of the present invention. That is, the adhesive resin composition of the present invention is applied on an insulating film, dried (semi-cured state), further laminated with a metal foil, and then heat-cured (so-called three-layer substrate); insulating film The adhesive resin composition of the present invention is applied and dried (semi-cured state), and the exposed surface of the adhesive layer is covered with an insulating film called a separator (so-called coverlay); on the separator or on the substrate film
- a flexible printed wiring board is obtained by coating the adhesive resin composition of the present invention, drying (semi-cured state), laminating an exposed surface covered with a separator (so-called adhesive sheet), etc., and curing by heating. Can be formed. The separator is removed during lamination.
- the semi-cured state is formed by heating the adhesive resin composition of the present invention at, for example, 100 to 180 ° C. for 2 minutes in a state having adhesiveness.
- the heat-cured state is formed by, for example, heating the semi-cured adhesive layer at 140 to 180 ° C. for 10 minutes to several hours, and further pressing as necessary. This refers to the state cured by heat reaction.
- a suitable heating time varies depending on the component and application of the adhesive (for example, a substrate, a coverlay, or a bonding film).
- the three-layer substrate of the present invention is only required to have a metal foil attached to at least one surface of an insulating film, and has a three-layer structure (so-called three-layer single-sided substrate) comprising an insulating film, an adhesive layer, and a metal foil layer.
- a five-layer structure (so-called three-layer double-sided substrate) composed of a metal foil, an adhesive layer, an electrical insulating film, an adhesive layer, and a metal foil layer may be used.
- Examples of the insulating film include a polyimide film, a polyester film, a polyether ether ketone film, and a polyphenylene sulfide film.
- Examples of the metal foil include copper foil and aluminum foil, and copper foil is preferably used.
- Coverlay film is a laminated body used as a material covering the wiring pattern formation surface to protect the wiring after processing the copper foil of the flexible copper-clad laminate and forming the wiring pattern.
- a semi-cured adhesive layer made of the adhesive resin composition of the present invention is laminated on a film. Usually, a separator having releasability is attached on the adhesive layer.
- the adhesive sheet is a laminate of a separator and, in some cases, a base film and a semi-cured adhesive layer made of the adhesive resin composition of the present invention, and is used for laminating substrates and sticking reinforcing plates. Is called.
- the substrate film may be a prepreg sheet based on a heat-resistant and insulating film such as a polyimide film, a glass fiber reinforced resin sheet, or a nonwoven fabric, depending on the application.
- Adhesive Resin Composition No. Preparation and evaluation of 1 to 15 180 parts by mass of phosphorus-containing epoxy / phenoxy resin as component A, 100 parts by mass of polyamide resin as component (C), and 20 parts by mass of epoxy-containing copolymer having the characteristics shown in Table 1 as component (B) Further, phosphazene and a curing agent, which are flame retardants, were added and dissolved by stirring in a solvent (methyl ethyl ketone and dimethylformamide). 1-15 were prepared.
- phosphorus-containing epoxy / phenoxy resin a 1: 1 mixture of phosphorus-containing epoxy FX289 from Toto Kasei and phosphorus-containing phenoxy ERF001 is used, and SPB100 manufactured by Otsuka Chemical is used as the phosphazene.
- the blending amount was determined so that the phosphorus content with respect to was 3.5% by mass.
- trimellitic acid manufactured by Mitsubishi Chemical Corporation was used, and an appropriate amount calculated from the epoxy equivalent was blended.
- an epoxy group donating monomer is glycidyl methacrylate, and as an ethylenically unsaturated monomer to be copolymerized, styrene, methyl methacrylate (MMA), or acrylonitrile (AN), ethyl acrylate (EAA), Alternatively, butyroacrylate (BAA) was used.
- No. No. 2 uses a homopolymer of glycidyl methacrylate in which other ethylenically unsaturated monomers are not copolymerized.
- No. No. 7 3 and no. A 1: 1 mixture of the epoxy-containing copolymer used in No. 8 was used.
- 9, no. 10 is No. 10 respectively.
- no. 11 is a case where a mixture obtained by mixing the epoxy-containing copolymer used in No. 11 at a ratio of 5: 3, 3: 5 is used.
- the adhesive solution No. 1 is a homopolymer of an epoxy-containing copolymer. 2 also showed higher adhesive strength than the reference example.
- FIG. 4 is a graph showing the relationship between epoxy equivalent (horizontal axis) and peel strength (vertical axis) for adhesive solutions 1 to 12;
- x indicates a homopolymer of an epoxy group donating monomer
- ⁇ indicates a case where acrylonitrile is used as an ethylenically unsaturated copolymerization monomer.
- the peel strength increases as the epoxy equivalent increases until the epoxy equivalent is about 800 g / eq. Is saturated at about 800 g / eq, and gradually decreases from 3000 g / eq.
- the adhesive resin composition of the present invention can provide a one-component adhesive solution with excellent storage stability. Therefore, there is no problem in pot life and storage stability, such as variations in adhesiveness between products in the production line, and stirring and cleaning of the equipment each time use is started. This is useful for continuous and intermittent use.
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Abstract
Description
本発明の接着性樹脂組成物は、(A)エポキシ樹脂及び/又はフェノキシ樹脂;(B)エポキシ供与モノマー及び当該モノマーと共重合可能なエチレン性不飽和モノマーとを共重合してなる、特定の重量平均分子量及びエポキシ当量を有するエポキシ含有共重合体;(C)熱可塑性樹脂;(D)硬化剤を含む。
以下、各成分について順に説明する。
本発明の接着性樹脂組成物は、エポキシ樹脂及び/又はフェノキシ樹脂を含む。
本発明で用いられるエポキシ樹脂は、1分子中に少なくとも2個のエポキシ基を有する樹脂であればよく、ビスフェノールA型エポキシ樹脂、ビスフェノールF型エポキシ樹脂、グリシジルエーテル型エポキシ樹脂、グリシジルエステル型エポキシ樹脂、グリシジルアミン型エポキシ樹脂、ノボラック型エポキシ樹脂、クレゾールノボラック型エポキシ樹脂等が挙げられる。
本発明で用いられるエポキシ含有共重合体とは、エポキシ基供与モノマー及び当該エポキシ供与モノマーと共重合可能なエチレン性不飽和モノマーとが共重合してなる共重合体で、重量平均分子量5000~10万未満で且つエポキシ当量が3500g/eq以下である共重合体である。
重量平均分子量5000未満では、得られる接着層の機械的強度が不足する傾向にある。一方、10万以上では、相溶性が劣るため、透明な接着剤溶液が得られにくく、保存安定性が良くない。
特に、アクリロニトリルモノマーを共重合したエポキシ含有共重合体は、他のエチレン性不飽和モノマーを含有させたエポキシ含有共重合体よりも、接着強度が向上するので好適である。但し、共重合系においてアクリロニトリルモノマーの量が多くなると、未反応のアクリロニトリルモノマーが残存しやすくなり、エポキシ含有共重合体中に含有されて悪影響を及ぼす場合があるので、エポキシ含有共重合体におけるアクリロニトリルモノマーユニットの含有率は、1~20質量%とすることが好ましく、より好ましくは1~15質量%である。
また、ブタジエン等のいわゆるゴム成分となるジエン系モノマーは、耐候性、耐熱性低下の原因となるので、含有させないことが好ましい。
2種以上のエチレン性不飽和モノマーが共重合される場合には、それぞれのモノマーがエポキシ基供与モノマーとランダムに重合していていもよいし、各モノマーのブロックがエポキシ基供与モノマーブロックと適宜組み合わされたトリブロックコポリマー、テトラブロックコポリマーであってもよいし、各ブロックに複数のモノマーがランダムに共重合したものであってもよい。
熱可塑性樹脂(C)としては、特に限定せず、例えば、アクリル樹脂、ポリスチレン樹脂、ポリアミド樹脂、ポリアミドイミド樹脂、ポリエステル樹脂、ポリカーボネート樹脂、ポリフェニレンオキシド樹脂、ポリフェニレンスルフィド樹脂(ポリフェニレンスルフィド、ポリフェニレンスルフィドケトン、ポリフェニレンスルフィドスルホン等)、ポリスルホン樹脂(ポリスルホン、ポリエーテルスルホン等)、ポリエーテルイミド樹脂(ポリ-N-ホルミルエチレンイミン樹脂等)、ポリエーテルエーテルケトン樹脂等、ポリアセタール樹脂(ポリオキシメチレン樹脂等)、ケトン樹脂(脂肪族ポリケトン樹脂、アセトンホルムアルデヒド樹脂、アセトンフルフラール樹脂、環状ケトン樹脂等)等があげられる。これらは単独でもしくは2種以上併せて用いることができる。
ジカルボン酸としては、例えば、テレフタル酸、イソフタル酸、オルトフタル酸、ナフタレンジカルボン酸(1,5-、2,5-、2,6-および2,7-体)酸、ビフェニルジカルボン酸(2,2′-、3,3′-および4,4′-体)、4,4′-ジフェニルエーテルジカルボン酸、4,4′-ジフェニルメタンジカルボン酸、4,4′-ジフェニルスルホンジカルボン酸、1,2-ビス(フェノキシ)エタン-4,4′-ジカルボン酸、2,5-アントラセンジカルボン酸(2,5-および2,6-体)、フェニレンジアセティック酸(o-、m-およびp-体)、フェニレンジプロピオン酸(o-、m-およびp-体)、フェニルマロン酸、フェニルグルタル酸およびジフェニルコハク酸、シュウ酸、マロン酸、コハク酸、グルタル酸、アジピン酸、セバシン酸、デカンジカルボン酸、マレイン酸、フマール酸およびイタコン酸、1,3-シクロブタンジカルボン酸、1,3-シクロペンタンジカルボン酸、1,4-シクロヘキサンジカルボン酸、1,2-シクロヘキサンジカルボン酸、1,3-ジカルボキシメチルシクロヘキサン、1,4-ジカルボキシメチルシクロヘキサン、ジシクロヘキシル-4,4′-ジカルボン酸およびダイマー酸等があげられる。
また、上記ジアミンとしては、例えば、ヘキサメチレンジアミン、ヘプタメチレンジアミン、p-ジ-アミノメチルシクロヘキサン、ビス(p-アミンシクロヘキシル)メタン、m-キシレンジアミン、1,4-ビス(3-アミノプロポキシ)シクロヘキサン、ピペラジン、イソホロンジアミン等があげられる。
上記アミノカルボン酸としては、例えば、11-アミノウンデカン酸、12-アミノドデカン酸、4-アミノメチル安息香酸、4-アミノメチルシクロヘキサンカルボン酸、7-アミノエナント酸、9-アミノノナン酸等があげられる。
上記ラクタムとしては、例えば、ε-カプロラクタム、ω-ラウロラクタム、α-ピロリドン、α-ピペリドン等があげられる。
これらのうち特にダイマー酸を構成成分に含むポリアミドは、常法のダイマー酸とジアミンの重縮合により得られるが、この際にダイマー酸以外のアジピン酸、アゼライン酸またはセバシン酸などのジカルボン酸を共重合成分として含有してもよい。
硬化剤は、エポキシ樹脂、フェノキシ樹脂の硬化剤として用いられるものであればよく、ポリアミン系硬化剤、酸無水物系硬化剤、三フッ化ホウ素アミン錯塩、イミダゾール系硬化剤、芳香族ジアミン系硬化剤、カルボン酸系硬化剤、フェノール樹脂等が用いられる。
ポリアミン系硬化剤としては、例えば、ジエチレントリアミン、テトラエチレンテトラミン等の脂肪族アミン系硬化剤;イソホロンジアミン等の脂環式アミン系硬化剤;ジアミノジフェニルメタン、フェニレンジアミン等の芳香族アミン系硬化剤;ジシアンジアミド等が挙げられる。酸無水物系硬化剤としては、例えば、無水フタル酸、ピロメリト酸無水物、トリメリト酸無水物、ヘキサヒドロ無水フタル酸等が挙げられる。
硬化剤の配合量は、A成分のエポキシ樹脂のエポキシ当量に応じて適宜決められる。
本発明の樹脂組成物は、上記熱硬化性樹脂、熱可塑性樹脂、硬化剤の他、さらに、非ハロゲン系難燃剤、好ましくはリン系難燃剤を含有してもよい。
本発明の接着性組成物は、以上のような(A)~(D)の成分、さらに必要に応じて、非ハロゲン系難燃剤、その他の添加剤を配合して調製される。
樹脂組成物中のリン含有率が3.1~4.5質量%となるように調製することが好ましい。
以上のような構成を有する本発明の接着性樹脂組成物は、樹脂成分である(A)成分、(B)成分,(C)成分が互いに相溶性に優れているので、10質量%以上の高濃度であっても、各樹脂成分が分離・凝集することなく均一に混ざりあった、高接着性の一液性接着剤を提供できる。
以上のような構成を有する本発明の接着性樹脂組成物は、非ハロゲン系で、UL-94規格のV-0クラス、VTM-0クラスの難燃性を充足し、優れた接着性を発揮できる溶液タイプの接着剤溶液を提供できるので、接着シート、カバーレイなどの積層体やフレキシブル印刷配線板などに塗工して用いる接着剤として有用である。
金属箔としては、銅箔、アルミニウム箔等が挙げられるが、銅箔が好適に用いられる。
(1)相溶性
調製した接着剤溶液を目視で観察し、透明溶液(但し、磨りガラス程度の不透明度は、含む)が得られていた場合には、「○」、白濁し1週間放置後には、分離が認められた場合には、「△」、強制的に攪拌混合しても2時間以内に分離層が発生する場合には、「×」とした。
厚み25μmのポリイミドフィルム表面に、調製した接着剤溶液を、乾燥後20μmの厚みとなるように塗布し、150℃で2分間乾燥させて、半硬化状態の接着層を形成した。この半硬化状態の接着層上に、厚み18μmの圧延銅箔を積層した後、熱プレスにて3MPaの圧力下、160℃で40分間加熱を行い、フレキシブル印刷配線板を作成した。作製したフレキシブル印刷配線板について、JIS C 6481に準拠し、23℃において、銅箔側から引張り、ポリイミドフィルムから剥がすときの剥離強度(N/cm)を測定した。
(2)で作製したポリイミドフィルムと半硬化状態の接着層との積層物を、銅箔を積層せず、圧力をかけずに160℃で40分加熱したものを用いて、UL-94に準拠して難燃性の評価試験を行った。そして、上記規格に合格(V-0クラス)のものを「OK」、不合格のものを「NG」とした。
A成分としてリン含有エポキシ/フェノキシ樹脂180質量部、(C)成分としてポリアミド樹脂100質量部、及び(B)成分として表1に示すような特性を有するエポキシ含有共重合体20質量部を配合し、さらに難燃剤であるホスファゼン及び硬化剤を添加して、溶媒(メチルエチルケトン及びジメチルホルムアミド)に攪拌溶解し、固形分濃度30質量%の接着剤溶液No.1~15を調製した。
なお、No.13-15については、接着剤溶液が2層に分離してしまったため、剥離強度、難燃性について測定しなかった。
また、エポキシ含有共重合体のホモポリマーであるNo.2についても、参考例より、高い接着強度を示した。
図1において、破線で示すように、エポキシ基供与モノマーの単独重合体の場合を除いて、エポキシ当量が800g/eq程度までは、エポキシ当量が大きくなるにしたがって剥離強度も増大するが、エポキシ当量が800g/eq程度で飽和し、3000g/eqから徐々に低下する傾向にあることがわかる。また、エチレン性不飽和モノマーとしてアクリロニトリルを用いた場合(図1中の「●」)には、他のエチレン性不飽和モノマーを用いた、エポキシ当量が同程度(図1中の破線)のエポキシ含有共重合体と比べて、接着強度が高いことがわかる。
Claims (9)
- (A)エポキシ樹脂及び/又はフェノキシ樹脂;(B)エポキシ供与モノマー及び当該モノマーと共重合可能なエチレン性不飽和モノマーとを共重合してなるエポキシ含有共重合体;(C)熱可塑性樹脂;(D)硬化剤を含む接着性樹脂組成物であって、
前記(B)エポキシ含有共重合体が、重量平均分子量5000~10万未満で且つエポキシ当量が3500g/eq以下である共重合体を用いる接着性樹脂組成物。 - 前記(B)エポキシ含有共重合体におけるエチレン性不飽和モノマーユニットは、スチレン、アクリロニトリル、及び(メタ)アクリル酸エステルからなる群より選ばれる少なくとも1種である請求項1に記載の接着性樹脂組成物。
- 接着性樹脂組成物に含まれる樹脂成分中の前記(A)成分の含有率は、40~70質量%であり、前記(B)成分の含有率は、3~25質量%である請求項1又は2に記載の接着性樹脂組成物。
- 前記(B)エポキシ含有共重合体におけるエポキシ基供与モノマーは、(メタ)アクリルグリシジルエステルである請求項1~3のいずれかに記載の接着性樹脂組成物。
- 前記(A)エポキシ樹脂及び/又はフェノキシ樹脂は、リン含有エポキシ樹脂及び/又はフェノキシ樹脂を含有している請求項1~4のいずれか1項に記載の接着性樹脂組成物。
- さらにリン系難燃剤を含み、樹脂組成物におけるリン含有率が3.1~4.5質量%である請求項1~5のいずれか1項に記載の接着性樹脂組成物。
- 請求項1~6のいずれか1項に記載の接着性樹脂組成物の含有率が5~60質量%の一液性接着剤溶液。
- 基材フィルム上に、請求項1~7のいずれか1項に記載の接着性樹脂組成物からなる接着層を有する積層体。
- 請求項8に記載の積層体を含むフレキシブル印刷配線板。
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US13/318,304 US20120048598A1 (en) | 2009-04-30 | 2010-03-26 | Adhesive resin composition, and laminate and flexible printed wiring board using the same |
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JP6142961B1 (ja) * | 2016-03-08 | 2017-06-07 | 東洋インキScホールディングス株式会社 | 積層体およびその製造方法、並びに接着層付樹脂フィルム |
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JP5978782B2 (ja) * | 2012-06-06 | 2016-08-24 | デクセリアルズ株式会社 | 熱硬化性接着組成物、熱硬化性接着シート及び補強フレキシブルプリント配線板 |
KR102375986B1 (ko) * | 2015-03-13 | 2022-03-17 | 닛테츠 케미컬 앤드 머티리얼 가부시키가이샤 | 옥사졸리돈 고리 함유 에폭시 수지, 그 제조 방법, 에폭시 수지 조성물, 및 경화물 |
CN105733485B (zh) * | 2016-04-28 | 2018-06-05 | 陕西生益科技有限公司 | 一种树脂组合物及其应用 |
US10597559B2 (en) | 2016-06-06 | 2020-03-24 | Crane Composites, Inc. | Method of manufacturing a composite panel containing lauan or other moisture-carrying or moisture-absorbing material using adhesion promoter and panel made using the method |
JP7249837B2 (ja) * | 2019-03-22 | 2023-03-31 | 旭化成株式会社 | 難燃性メタクリル系樹脂組成物及び成形体 |
JP6987824B2 (ja) * | 2019-10-25 | 2022-01-05 | 矢崎総業株式会社 | 通信ケーブル及びワイヤハーネス |
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JP2010260925A (ja) | 2010-11-18 |
CN102414288B (zh) | 2014-07-30 |
CN102414288A (zh) | 2012-04-11 |
KR20120022736A (ko) | 2012-03-12 |
TW201043677A (en) | 2010-12-16 |
US20120048598A1 (en) | 2012-03-01 |
JP5792924B2 (ja) | 2015-10-14 |
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