WO2009148182A1 - 難接着基材用接着剤組成物とそれを用いた接着剤および光学ディスク装置 - Google Patents
難接着基材用接着剤組成物とそれを用いた接着剤および光学ディスク装置 Download PDFInfo
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- WO2009148182A1 WO2009148182A1 PCT/JP2009/060474 JP2009060474W WO2009148182A1 WO 2009148182 A1 WO2009148182 A1 WO 2009148182A1 JP 2009060474 W JP2009060474 W JP 2009060474W WO 2009148182 A1 WO2009148182 A1 WO 2009148182A1
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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
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
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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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/22—Apparatus or processes for the manufacture of optical heads, e.g. assembly
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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
Definitions
- the present invention relates to an adhesive composition for difficult-to-adhere substrates, an adhesive using the same, and an optical disk device. More specifically, a reactive oligomer having a (meth) acryloyl group, at least one aliphatic branched structure and an alicyclic aliphatic structure in the molecule, and one (meth) acryloyl group at the molecular end.
- the present invention relates to an adhesive composition for difficult-to-adhere base materials containing the above-described compounds as essential components.
- optical disk devices for recording / reproducing next-generation optical discs such as Blu-ray discs (BD) having a recording density higher than that of compact discs (CDs) and digital versatile discs (DVDs) are rapidly spreading. is doing.
- BD Blu-ray discs
- CDs compact discs
- DVDs digital versatile discs
- an optical disk device is provided with an optical pickup device that reads information (optical signal) recorded on a recording medium.
- the optical pickup device is assembled and fixed from the viewpoint of processability by UV.
- An adhesive that is cured using an active energy ray such as is used (Patent Document 1).
- the same process should be applied to BD, but in the case of BD, the transmitted optical signal is much finer than that of CD or DVD, so that a very high design accuracy is required for assembling the device. Is done. Therefore, in assembling the BD optical pickup device, there is a demand for an adhesive that does not cause misalignment during assembly, that is, has less shrinkage during curing.
- the substrate of the optical pickup device is made of cycloolefin polymer (COP) or glass for the lens, and polyphenylene sulfide (PPS), liquid crystal polymer (LCP) or magnesium alloy for the peripheral materials (lens holder, housing, etc.). Often used. These materials, particularly COP, PPS, and LCP, are often difficult to bond due to surface energy problems inherent in the polymer, and the adhesive may be required to have high adhesion to these substrates.
- COP cycloolefin polymer
- PPS polyphenylene sulfide
- LCP liquid crystal polymer
- magnesium alloy magnesium alloy
- the adhesive necessary for adhesive fixing of the optical pickup device is required to have low curing shrinkage and high adhesion to the target adhesive substrate.
- the present invention provides an adhesive composition having high adhesion to difficult-to-adhere substrates such as COP, PPS, and LCP, and further an adhesive composition having cure shrinkage suitable for manufacturing an optical disk device.
- the purpose is to provide.
- the present invention comprises a specific reactive oligomer and a specific compound having at least one aliphatic branched structure and alicyclic aliphatic structure in the molecule.
- the present inventors have devised an adhesive composition for a difficult-to-adhere substrate and have completed the present invention.
- the present invention (A) General formula (1): —OC (O) C (R a ) ⁇ CH 2 (1) (Wherein R a represents a hydrogen atom or an organic group having 1 to 20 carbon atoms) And (B) at least one aliphatic branched structure and an alicyclic aliphatic structure in the molecule, and the general formula (2): —OC (O) C (R b ) ⁇ CH 2 (2) (Wherein R b represents a hydrogen atom or an organic group having 1 to 20 carbon atoms)
- the present invention relates to an adhesive composition for difficult-to-adhere substrates, comprising as an essential component a compound having at least one group represented by the formula:
- the aliphatic branched structure of component (B) is preferably a t-butyl group.
- the reactive oligomer of component (A) is a vinyl polymer having two or more groups represented by the general formula (1) per molecule and having one or more substituents at the molecular ends. preferable.
- the component (D) is preferably a radical photopolymerization initiator.
- the molecular weight distribution of the component (A) and / or the component (C) is preferably less than 1.8.
- the component (A) and / or the component (C) is a (meth) acrylic polymer.
- this invention relates to the adhesive agent which used the said adhesive composition for difficult-to-adhere base materials as a main component.
- the adhesive preferably uses polyphenylene sulfide, polycycloolefin, liquid crystal polymer, or magnesium alloy as an adherend.
- the adhesive is preferably used for bonding an optical member.
- the adhesive is preferably used for manufacturing an optical disk device.
- the present invention relates to an optical disc apparatus manufactured using the adhesive.
- the present invention since it is an adhesive composition for a difficult-to-adhere substrate comprising a specific reactive oligomer and a specific compound having at least one aliphatic branched structure and alicyclic aliphatic structure in the molecule, High adhesion to materials such as COP, PPS, LCP.
- the component (A) is represented by the general formula (1): —OC (O) C (R a ) ⁇ CH 2 (1) (Wherein R a represents a hydrogen atom or an organic group having 1 to 20 carbon atoms) Is a reactive oligomer having more than one group ((meth) acryloyl group) represented by From the viewpoint of curability and processability, it is preferably a photo-radical curable oligomer, and it is preferable to have two or more (meth) acryloyl groups from the viewpoint of crosslinking.
- the term “two or more” means that all the components (A) do not have to have two or more (meth) acryloyl groups, preferably 1.2 or more on average, more preferably 1.5 or more, More preferably, it may be 1.7 or more.
- the number of (meth) acryloyl groups is preferably 10 or less, more preferably 6 or less, and even more preferably 5 or less.
- At least one of the (meth) acryloyl group is present at the molecular terminal of the vinyl polymer from the viewpoint of obtaining rubber elasticity by making the molecular weight between cross-linking points uniform and large, preferably 500 to 100,000. And preferably present at both ends.
- Ra in the (meth) acryloyl group represents a hydrogen atom or an organic group having 1 to 20 carbon atoms, preferably a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms.
- Examples of the organic group having 1 to 20 carbon atoms include an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, a nitrile group, and the like. You may have the substituent of.
- the organic group preferably has 1 to 18 carbon atoms, and more preferably 1 to 16 carbon atoms.
- alkyl group having 1 to 20 carbon atoms examples include aryl groups having 6 to 20 carbon atoms such as a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, an octyl group, and a decyl group.
- aryl groups having 6 to 20 carbon atoms such as a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, an octyl group, and a decyl group.
- aralkyl group having 7 to 20 carbon atoms such as a phenyl group and a naphthyl group include a benzyl group and a phenylethyl group.
- R a examples include, for example, —H, —CH 3 , —CH 2 CH 3 , — (CH 2 ) n CH 3 (n represents an integer of 2 to 19), —C 6 H 5 , —CH 2 OH, —CN and the like are preferable, and —H, —CH 3 are more preferable.
- (A) There is no limitation in particular in the vinyl-type monomer which comprises the principal chain of a component, Various things can be used. Examples include (meth) acrylic acid, methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, Isobutyl (meth) acrylate, tert-butyl (meth) acrylate, n-pentyl (meth) acrylate, n-hexyl (meth) acrylate, cyclohexyl (meth) acrylate, n-heptyl (meth) acrylate, N-octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, nonyl (meth) acrylate, decyl (meth) acrylate, dodecy
- Acrylic monomers such as styrene, vinyl toluene, ⁇ -methyl styrene, chlorostyrene, styrene sulfonic acid and salts thereof; fluorine-containing vinyl monomers such as perfluoroethylene, perfluoropropylene, vinylidene fluoride; Silicon-containing vinyl monomers such as vinyltrimethoxysilane and vinyltriethoxysilane; maleic anhydride, maleic acid, monoalkyl and dialkyl esters of maleic acid; fumaric acid, monoalkyl esters of fumaric acid and di Kill esters; maleimide monomers such as maleimide, methylmaleimide, ethylmaleimide, propylmaleimide, butylmaleimide, hexylmaleimide, octylmaleimide, dodecylmaleimide, stearylmaleimide, phenylmaleimide, cyclohexy
- aromatic vinyl monomers and (meth) acrylic monomers are preferred from the viewpoint of physical properties of the product.
- Acrylic acid ester monomers and methacrylic acid ester monomers are more preferable, and butyl acrylate, ethyl acrylate, and 2-methoxyethyl acrylate are more preferable.
- the vinyl monomer constituting the main chain may contain at least two selected from butyl acrylate, ethyl acrylate and 2-methoxyethyl acrylate. Particularly preferred.
- Examples of the reactive oligomer (A) include epoxy acrylate resins such as bisphenol A type epoxy acrylate resins, phenol novolac type epoxy acrylate resins, and cresol novolak type epoxy acrylate resins, and epoxy acrylate types such as COOH group-modified epoxy acrylate resins.
- Resin polyol (polytetramethylene glycol, polyester diol of ethylene glycol and adipic acid, ⁇ -caprolactone modified polyester diol, polypropylene glycol, polyethylene glycol, polycarbonate diol, hydroxyl-terminated hydrogenated polyisoprene, hydroxyl-terminated polybutadiene, hydroxyl-terminated polyisobutylene, etc.
- organic isocyanates tolylene diisocyanate, isophorone diisocyanate, diphe Urethane resins obtained from methane diisocyanate, hexamethylene diisocyanate, xylylene diisocyanate, etc.
- a polyacrylacrylate resin from the viewpoint of low viscosity, low curing shrinkage, and flexibility, it is preferable to use a polyacrylacrylate resin, and it is more preferable to use a polyacrylacryl
- urethane acrylate resins obtained by reacting the above-mentioned modified polyol and urethane resin obtained from organic isocyanate with a hydroxyl group-containing (meth) acrylate are used. It is preferable to use it.
- these preferable monomers may be copolymerized with the other monomers, and in this case, it is preferable that these preferable monomers are contained in a weight ratio of 40% or more.
- the component (A) is preferably a (meth) acrylic polymer in terms of adhesion to a difficult-to-adhere substrate, heat resistance, and weather resistance.
- the molecular weight distribution of component (A) is not particularly limited, but preferably less than 1.8. More preferably, it is 1.7 or less, more preferably 1.6 or less, particularly preferably 1.5 or less, particularly preferably 1.4 or less, and most preferably 1.3 or less.
- a polystyrene gel column is usually used with chloroform or tetrahydrofuran as a mobile phase, and the molecular weight value is obtained in terms of polystyrene.
- the lower limit of the number average molecular weight of the component (A) is preferably 500, more preferably 3,000, and the upper limit is preferably 100,000, more preferably 40,000. If the molecular weight is less than 500, the original characteristics of the vinyl polymer tend to be hardly expressed, and if it exceeds 100,000, handling tends to be difficult.
- the component (C) has the general formula (3) —OC (O) C (R c ) ⁇ CH 2 (3) (Wherein R c represents a hydrogen atom or an organic group having 1 to 20 carbon atoms) Is a vinyl polymer having, on average, one or less groups ((meth) acryloyl group) represented by It is preferable from the viewpoint of rubber elasticity after curing that it has one (meth) acryloyl group and the substituent is present at the molecular end.
- R c is the same as the above R a is illustrated.
- the (meth) acryloyl group is preferably 0.5 or more, and more preferably 0.7 or more. When the amount is less than these ranges, there are many unreacted portions remaining and it is difficult to obtain a cured product for the purpose.
- the vinyl monomer constituting the main chain of the component (C) is not particularly limited, and various types can be used. As a specific example, the same vinyl monomer that constitutes the main chain of the component (A) can be used, and the vinyl monomer that constitutes the main chain of the component (A) can also be used and preferred vinyl monomers and the like. The same.
- the component (C) is preferably a (meth) acrylic polymer in terms of adhesion to a hardly-adhesive substrate, heat resistance and weather resistance.
- the molecular weight distribution of component (C) is not particularly limited, but is preferably less than 1.8. More preferably, it is 1.7 or less, more preferably 1.6 or less, particularly preferably 1.5 or less, particularly preferably 1.4 or less, and most preferably 1.3 or less.
- the lower limit of the number average molecular weight of the component (C) is preferably 500, more preferably 2,000, and the upper limit is preferably 100,000, more preferably 40,000. If the molecular weight is less than 500, the original characteristics of the vinyl polymer tend to be hardly expressed, and if it exceeds 100,000, handling tends to be difficult.
- (C) component has the objective to reduce the viscosity of a composition, it is preferable that the viscosity in 23 degreeC is 100 Pa.s or less.
- the amount of component (C) used is not particularly limited, but it is preferably 5 to 200 parts, more preferably 10 to 100 parts, per 100 parts (parts by weight) of component (A). .
- the amount is less than 5 parts, the effect of reducing the viscosity of the composition is small, and when it exceeds 200 parts, the curability tends to be low.
- the vinyl polymer is generally produced by anionic polymerization or radical polymerization, and radical polymerization is preferred because of the versatility of the monomer or ease of control.
- radical polymerizations it is preferably produced by living radical polymerization or radical polymerization using a chain transfer agent, and the former is particularly preferable.
- the radical polymerization method used for the production of the component (A) and the component (C) uses an azo compound, a peroxide, or the like as a polymerization initiator, and a monomer having a specific functional group and a vinyl monomer are simply co-polymerized. It can be classified into “general radical polymerization method” for polymerization and “controlled radical polymerization method” in which a specific functional group can be introduced at a controlled position such as a terminal.
- the “general radical polymerization method” is a simple method. However, in this method, a monomer having a specific functional group is introduced into the polymer only in a probabilistic manner, so an attempt is made to obtain a polymer having a high functionalization rate. In such a case, it is necessary to use this monomer in a considerably large amount, and conversely, in the case of using a small amount, there is a problem that the proportion of the polymer in which this specific functional group is not introduced becomes large. Moreover, since it is free radical polymerization, there is a problem that only a polymer having a wide molecular weight distribution and a high viscosity can be obtained.
- the “controlled radical polymerization method” further includes a “chain transfer agent method” in which a vinyl polymer having a functional group at a terminal is obtained by polymerization using a chain transfer agent having a specific functional group, It can be classified as “living radical polymerization method” in which a polymer having a molecular weight almost as designed can be obtained by growing the terminal without causing a termination reaction or the like.
- chain transfer agent method a polymer having a high functionalization rate can be obtained, but a chain transfer agent having a considerably large amount of a specific functional group with respect to the initiator is required. There is an economic problem. Further, like the above-mentioned “general radical polymerization method”, there is also a problem that only a polymer having a wide molecular weight distribution and high viscosity can be obtained because of free radical polymerization.
- the “living radical polymerization method” is a radical polymerization that is difficult to control because the polymerization rate is high and a termination reaction due to coupling between radicals is likely to occur. It is difficult to obtain a polymer having a narrow molecular weight distribution (Mw / Mn is about 1.1 to 1.5), and the molecular weight can be freely controlled by the charging ratio of the monomer and the initiator.
- the “living radical polymerization method” can obtain a polymer having a narrow molecular weight distribution and a low viscosity, and a monomer having a specific functional group can be introduced at almost any position of the polymer.
- the production method of the vinyl polymer having the specific functional group is more preferable.
- living polymerization refers to polymerization in which the terminal always has activity and the molecular chain grows, but in general, the terminal is inactivated and the terminal is activated. Pseudo-living polymerization in which is grown while in equilibrium.
- the definition in the present invention is also the latter.
- the “living radical polymerization method” has been actively researched by various groups in recent years.
- Examples thereof include those using a cobalt porphyrin complex as shown in Journal of the American Chemical Society (J. Am. Chem. Soc.), 1994, 116, 7943, “Atom transfer radical polymerization” using radical scavengers such as nitroxide compounds as shown in Macromolecules, 1994, 27, 7228, organic halides as initiators and transition metal complexes as catalysts. ("Atom Transfer Radical Polymerization: ATRP)".
- the “atom transfer radical polymerization method” for polymerizing vinyl monomers using an organic halide or a sulfonyl halide compound as an initiator and a transition metal complex as a catalyst is the above-mentioned “living radical polymerization method”.
- it has a halogen, which is relatively advantageous for functional group conversion reaction, at the end, and has a high degree of freedom in designing initiators and catalysts. Therefore, production of vinyl polymers having specific functional groups The method is more preferable.
- Examples of the atom transfer radical polymerization method include, for example, Matyjazewski et al., Journal of the American Chemical Society (J. Am. Chem. Soc.) 1995, 117, 5614, Macromolecules. 1995, 28, 7901, Science 1996, 272, 866, WO96 / 30421 pamphlet, WO97 / 18247 pamphlet or Sawamoto et al., Macromolecules 1995, 28, And the method described on page 1721.
- the radical polymerization using a chain transfer agent is not particularly limited, but the following two methods are exemplified as a method for obtaining a vinyl polymer having a terminal structure suitable for the present invention.
- JP-A-4-132706 discloses a method for obtaining a halogen-terminated polymer using a halogenated hydrocarbon as a chain transfer agent, JP-A-61-271306, JP-A-2594402, This is a method for obtaining a hydroxyl-terminated polymer by using a hydroxyl group-containing mercaptan or a hydroxyl group-containing polysulfide as a chain transfer agent as disclosed in JP-A-54-47782.
- Such compounds are not particularly limited, but are cyclic such as 2,2,6,6-substituted-1-piperidinyloxy radical and 2,2,5,5-substituted-1-pyrrolidinyloxy radical. Nitroxy free radicals from hydroxyamines are preferred.
- an alkyl group having 4 or less carbon atoms such as a methyl group or an ethyl group is suitable.
- nitroxy free radical compound examples include, but are not limited to, 2,2,6,6-tetramethyl-1-piperidinyloxy radical (TEMPO), 2,2,6,6-tetraethyl- 1-piperidinyloxy radical, 2,2,6,6-tetramethyl-4-oxo-1-piperidinyloxy radical, 2,2,5,5-tetramethyl-1-pyrrolidinyloxy radical, Examples thereof include 1,1,3,3-tetramethyl-2-isoindolinyloxy radical and N, N-di-t-butylamineoxy radical.
- TEMPO 2,2,6,6-tetramethyl-1-piperidinyloxy radical
- 2,2,6,6-tetraethyl- 1-piperidinyloxy radical 2,2,6,6-tetramethyl-4-oxo-1-piperidinyloxy radical
- 2,2,5,5-tetramethyl-1-pyrrolidinyloxy radical examples thereof include 1,1,3,3-tetramethyl-2-isoindoliny
- a stable free radical such as a galvinoxyl free radical may be used.
- the radical capping agent is used in combination with a radical generator. It is considered that the reaction product of the radical capping agent and the radical generator serves as a polymerization initiator and the polymerization of the addition polymerizable monomer proceeds.
- radical generator various compounds can be used, but a peroxide capable of generating a radical under the polymerization temperature condition is preferable.
- the peroxide is not particularly limited, but diacyl peroxides such as benzoyl peroxide and lauroyl peroxide, dialkyl peroxides such as dicumyl peroxide and di-t-butyl peroxide, diisopropyl peroxydicarbonate, Examples thereof include peroxycarbonates such as bis (4-t-butylcyclohexyl) peroxydicarbonate, and alkyl peresters such as t-butylperoxyoctate and t-butylperoxybenzoate. Benzoyl peroxide is particularly preferable.
- radical generators such as radical-generating azo compounds such as azobisisobutyronitrile may be used instead of peroxide.
- the following alkoxyamine compound may be used as an initiator. I do not care.
- a polymer having a functional group at the terminal can be obtained by using an alkoxyamine compound having a functional group such as a hydroxyl group as described above.
- a polymer having a functional group at the terminal can be obtained.
- polymerization conditions such as the monomer, solvent, polymerization temperature and the like used in the polymerization using a radical scavenger such as the nitroxide compound, but they may be the same as those used for the atom transfer radical polymerization described below.
- an organic halide particularly an organic halide having a highly reactive carbon-halogen bond (for example, a carbonyl compound having a halogen at the ⁇ -position or a compound having a halogen at the benzyl-position), or a halogen Sulfonyl compounds and the like are used as initiators.
- an organic halide or a sulfonyl halide compound having a functional group other than the functional group for initiating polymerization can also be used.
- a vinyl polymer having a structure represented by the general formula (1) at the end of one main chain and the functional group at the other main chain end is produced.
- Examples of the functional group include an alkenyl group, a crosslinkable silyl group, a hydroxyl group, an epoxy group, an amino group, and an amide group.
- the organic halide having an alkenyl group is not particularly limited.
- the general formula (4) R 6 R 7 C (X) —R 8 —R 9 —C (R 5 ) ⁇ CH 2 (4) (Wherein R 5 is a hydrogen atom or a methyl group, R 6 and R 7 are a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, or the like.
- R 8 is -C (O) O- (ester group), -C (O)-(keto group), or o-, m-, p-phenylene group
- R 9 is directly connected
- X is a chlorine atom, a bromine atom or an iodine atom) What is shown by is illustrated.
- substituents R 6 and R 7 include a hydrogen atom, a methyl group, an ethyl group, an n-propyl group, an isopropyl group, a butyl group, a pentyl group, and a hexyl group.
- R 6 and R 7 may be linked at the other end to form a cyclic skeleton.
- Examples of the divalent organic group having 1 to 20 carbon atoms that may contain one or more ether bonds of R 9 include, for example, those having 1 to 20 carbon atoms that may contain one or more ether bonds. Examples include an alkylene group.
- X is a chlorine atom, bromine atom or iodine atom, and n is an integer of 0 to 20
- m CH CH 2, H 3 CC (H) (X ) C (O) O (CH 2) n O (CH 2)
- m CH CH 2, (H 3 C) 2 C ( X) C (O) O (CH 2) n O (CH 2)
- m CH CH 2, CH 3 CH 2 C (H) (X) C (O) O (CH 2 ) n O (CH 2 ) m CH ⁇ CH 2
- the organic halide having an alkenyl group is further represented by the general formula (5): H 2 C ⁇ C (R 5 ) —R 9 —C (R 6 ) (X) —R 10 —R 7 (5) (Wherein R 5 , R 6 , R 7 , R 9 , X are the same as above, R 10 is a direct bond, —C (O) O— (ester group), —C (O) — (keto group) Or o-, m-, p-phenylene group) And the like.
- R 9 is a direct bond or a divalent organic group having 1 to 20 carbon atoms (which may contain one or more ether bonds), and in the case of a direct bond, a halogen atom is bonded.
- a vinyl group is bonded to carbon, which is an allyl halide.
- R 10 is preferably a C (O) O group, a C (O) group or a phenylene group in order to activate the carbon-halogen bond.
- sulfonyl halide compound having the alkenyl group examples include o-, m-, p-CH 2 ⁇ CH— (CH 2 ) n —C 6 H 4 —SO 2 X, o-, m-, p-CH 2 ⁇ CH— (CH 2 ) n —O—C 6 H 4 —SO 2 X (In the above formula, X is a chlorine atom, bromine atom or iodine atom, and n is an integer of 0 to 20) Etc.
- the organic halide having a crosslinkable silyl group is not particularly limited.
- the general formula (6) R 6 R 7 C (X) —R 8 —R 9 —C (H) (R 5 ) CH 2 — [Si (R 11 ) 2-b (Y) b O] m —Si (R 12 ) 3- a (Y) a (6)
- R 5 , R 6 , R 7 , R 8 , R 9 and X are the same as defined above, and R 11 and R 12 are all alkyl groups having 1 to 20 carbon atoms, aryl groups, aralkyl groups, or (R ′) 3 SiO— (R ′ is a monovalent hydrocarbon group having 1 to 20 carbon atoms, and three R ′ may be the same or different).
- An organosiloxy group when two or more R 11 or R 12 are present, they may be the same or different; Y represents a hydroxyl group or a hydrolyzable group; and Y is two or more When present, they may be the same or different, a is 0, 1, 2 or 3, b is 0, 1 or 2, m is an integer from 0 to 19, provided that a + mb ⁇ 1 Satisfied to be)
- a is 0, 1, 2 or 3
- b is 0, 1 or 2
- m is an integer from 0 to 19, provided that a + mb ⁇ 1 Satisfied to be
- the organic halide having a crosslinkable silyl group is further represented by the general formula (7): (R 12 ) 3-a (Y) a Si— [OSi (R 11 ) 2-b (Y) b ] m —CH 2 —C (H) (R 5 ) —R 9 —C (R 6 ) ( X) -R 10 -R 7 (7) (Wherein R 5 , R 6 , R 7 , R 9 , R 10 , R 11 , R 12 , a, b, X, Y are the same as above, m is an integer of 0 to 19) What is shown by is illustrated.
- the organic halide or sulfonyl halide compound having a hydroxyl group is not particularly limited, and examples thereof include the following. HO— (CH 2 ) n —OC (O) C (H) (R) (X) (Wherein X is a chlorine atom, bromine atom or iodine atom, R is a hydrogen atom or an alkyl group, aryl group or aralkyl group having 1 to 20 carbon atoms, n is an integer of 1 to 20)
- X is a chlorine atom, bromine atom or iodine atom
- R is a hydrogen atom or an alkyl group, aryl group or aralkyl group having 1 to 20 carbon atoms
- n is an integer of 1 to 20
- There is no limitation in particular in the organic halide or sulfonyl halide compound which has the said amino group The following are illustrated.
- X is a chlorine atom, bromine atom or iodine atom
- R is a hydrogen atom or an alkyl group, aryl group or aralkyl group having 1 to 20 carbon atoms
- n is an integer of 1 to 20
- an organic halide or sulfonyl halide compound having two or more starting points is used as an initiator. It is preferable to use as. For example,
- the transition metal complex used as the polymerization catalyst is not particularly limited, but preferably a metal complex having a group 7 element, group 8, group 9, group 10 or group 11 element as a central metal, such as copper, It is a complex of nickel, ruthenium and iron. Further preferred are a complex of zero-valent copper, monovalent copper, divalent ruthenium, divalent iron or divalent nickel. Of these, a copper complex is preferable.
- the monovalent copper compound examples include cuprous chloride, cuprous bromide, cuprous iodide, cuprous cyanide, cuprous oxide, cuprous perchlorate and the like. Can be given.
- a tristriphenylphosphine complex of divalent ruthenium chloride (RuCl 2 (PPh 3 ) 3 ) is also suitable as a catalyst.
- aluminum alkoxides can be added as an activator.
- a divalent iron bistriphenylphosphine complex FeCl 2 (PPh 3 ) 2
- a divalent nickel bistriphenylphosphine complex NiCl 2 (PPh 3 ) 2
- a divalent nickel bistributylphosphine complex NiBr 2 (PBu 3 ) 2
- the polymerization can be carried out without solvent or in various solvents.
- Solvent types include hydrocarbon solvents such as benzene and toluene, ether solvents such as diethyl ether and tetrahydrofuran, halogenated hydrocarbon solvents such as methylene chloride and chloroform, and ketones such as acetone, methyl ethyl ketone, and methyl isobutyl ketone.
- hydrocarbon solvents such as benzene and toluene
- ether solvents such as diethyl ether and tetrahydrofuran
- halogenated hydrocarbon solvents such as methylene chloride and chloroform
- ketones such as acetone, methyl ethyl ketone, and methyl isobutyl ketone.
- Solvents include alcohol solvents such as methanol, ethanol, propanol, isopropanol, n-butyl alcohol, tert-butyl alcohol, nitrile solvents such as acetonitrile, propionitrile, benzonitrile, ester solvents such as ethyl acetate, butyl acetate, Examples thereof include carbonate solvents such as ethylene carbonate and propylene carbonate. These may be used alone or in combination of two or more.
- the polymerization can be carried out at room temperature to 200 ° C, preferably 50 to 150 ° C.
- ⁇ Functional group introduction method> There are no particular limitations on the method for producing the component (A) and the component (C).
- a vinyl polymer having a reactive functional group is produced by the aforementioned method, and the reactive functional group is converted to a (meth) acryloyl group. It can manufacture by converting into the substituent which has.
- the method for introducing the (meth) acryloyl group at the terminal of the vinyl polymer is not particularly limited, and examples thereof include the following methods.
- the general formula (9) As the vinyl polymer having a halogen group at the terminal, the general formula (9): -CR 13 R 14 X (9) (In the formula, R 13 and R 14 are groups bonded to the ethylenically unsaturated group of the vinyl monomer, and X represents a chlorine atom, a bromine atom or an iodine atom) Those having a terminal group represented by are preferred.
- the introduction method 1 is a method by a reaction between a vinyl polymer having a halogen group at the terminal and a compound represented by the general formula (8).
- a vinyl polymer having a halogen group at the terminal is prepared by using the above-described organic halide or sulfonyl halide compound as an initiator and catalyzing a transition metal complex. Is produced by a method of polymerizing a vinyl monomer or a method of polymerizing a vinyl monomer using a halogen compound as a chain transfer agent, but the former is preferred.
- Examples of the organic group having 1 to 20 carbon atoms for R d in the general formula (8) are the same as those described above, and specific examples thereof are also the same as those described above.
- M + in the general formula (8) is a counter cation of an oxyanion, and examples thereof include alkali metal ions and quaternary ammonium ions.
- alkali metal ion examples include lithium ion, sodium ion, and potassium ion.
- examples of the quaternary ammonium ion include tetramethylammonium ion, tetraethylammonium ion, tetrabenzylammonium ion, trimethyldodecylammonium ion, and tetrabutyl. Examples thereof include ammonium ion and dimethylpiperidinium ion. Of these, alkali metal ions are preferable, and sodium ions and potassium ions are more preferable.
- the amount of the compound represented by the general formula (8) to be used is preferably 1 to 5 equivalents, more preferably 1.0 to 1.2 equivalents with respect to the terminal group represented by the general formula (9).
- the solvent for carrying out the reaction is not particularly limited, but is preferably a polar solvent because it is a nucleophilic substitution reaction.
- a polar solvent for example, tetrahydrofuran, dioxane, diethyl ether, acetone, dimethyl sulfoxide, dimethylformamide, dimethylacetamide, hexamethylphosphoric trimethyl. Amides, acetonitrile and the like are preferably used.
- the reaction temperature is not particularly limited, but is preferably 0 to 150 ° C, more preferably 10 to 100 ° C.
- the introduction method 2 is a method by a reaction between a vinyl polymer having a hydroxyl group at the terminal and a compound represented by the general formula (10).
- Examples of the organic group having 1 to 20 carbon atoms for R d in the general formula (10) are the same as those described above, and specific examples thereof are also the same as those described above.
- the vinyl polymer having a hydroxyl group at the terminal is a method of polymerizing a vinyl monomer using the above-mentioned organic halide or sulfonyl halide compound as an initiator and a transition metal complex as a catalyst, or a compound having a hydroxyl group as a chain transfer agent. Although it is produced by a method of polymerizing a vinyl monomer, the former is preferred.
- R 15 is preferably a hydrogen atom or a methyl group. Further, when R 16 is an ester group, it is a (meth) acrylate compound, and when R 16 is a phenylene group, it is a styrene compound.
- the second monomer When synthesizing a vinyl polymer by living radical polymerization, the second monomer has a low polymerizable alkenyl group and hydroxyl group as the second monomer after the end of the polymerization reaction or after completion of the reaction of the predetermined monomer.
- a method of reacting a compound A method of reacting a compound.
- the compound represented by the general formula (13) is not particularly limited, but alkenyl alcohols such as 10-undecenol, 5-hexenol and allyl alcohol are preferable because they are easily available.
- (C) A vinyl polymer having at least one carbon-halogen bond represented by the general formula (9) obtained by atom transfer radical polymerization by a method as disclosed in JP-A-4-132706. A method of introducing a hydroxyl group at a terminal by hydrolyzing or reacting a halogen atom with a hydroxyl group-containing compound.
- a vinyl polymer having at least one carbon-halogen bond represented by the general formula (9) obtained by atom transfer radical polymerization is added to the general formula (14): M + C ⁇ (R 19 ) (R 20 ) —R 18 —OH (14) (Wherein, R 18 and M + are as defined above, R 19, R 20 are both carbanion C - with an electron withdrawing group or one of the electron-withdrawing group stabilizing, the other is a hydrogen atom, a carbon number of 1 to 10 Represents an alkyl group or a phenyl group of A method of replacing halogen by reacting a stabilized carbanion having a hydroxyl group represented by
- Examples of the electron withdrawing group include —CO 2 R (ester group), —C (O) R (keto group), —CON (R 2 ) (amide group), —COSR (thioester group), —CN (nitrile group) ), —NO 2 (nitro group) and the like, —CO 2 R, —C (O) R, —CN are particularly preferable.
- the substituent R is an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms or an aralkyl group having 7 to 20 carbon atoms, preferably an alkyl group having 1 to 10 carbon atoms or a phenyl group.
- a vinyl polymer having at least one carbon-halogen bond represented by the general formula (9) obtained by atom transfer radical polymerization is allowed to react with a metal simple substance or an organometallic compound such as zinc to enolate.
- a vinyl polymer having at least one halogen atom represented by the general formula (9), preferably a halogen atom at the terminal of the polymer, is represented by the general formula (15): HO—R 18 —O ⁇ M + (15) (Wherein R 18 and M + are the same as above)
- a method in which the halogen atom is substituted with a hydroxyl group-containing substituent by reacting the hydroxyl group-containing compound represented by formula (1).
- the amount of the compound represented by the general formula (4) is preferably 1 to 10 equivalents, more preferably 1 to 5 equivalents with respect to the terminal hydroxyl group of the vinyl polymer.
- the solvent for carrying out the reaction is not particularly limited, but is preferably a polar solvent because it is a nucleophilic substitution reaction.
- a polar solvent for example, tetrahydrofuran, dioxane, diethyl ether, acetone, dimethyl sulfoxide, dimethylformamide, dimethylacetamide, hexamethylphosphoric trimethyl. Amides, acetonitrile and the like are preferably used.
- the reaction temperature is not particularly limited, but is preferably 0 to 150 ° C, more preferably 10 to 100 ° C.
- Examples of the organic group having 1 to 20 carbon atoms for R d in the general formula (11) are the same as those described above, and specific examples thereof are also the same as those described above.
- Examples of the divalent organic group having 2 to 20 carbon atoms represented by R ′ in the general formula (5) include, for example, an alkylene group having 2 to 20 carbon atoms (such as an ethylene group, a propylene group, and a butylene group), and 6 to 20 carbon atoms. And alkylene groups having 7 to 20 carbon atoms.
- the compound represented by the general formula (5) is not particularly limited, but particularly preferable compounds include 2-hydroxypropyl (meth) acrylate and 2-hydroxyethyl (meth) acrylate.
- the vinyl polymer having a hydroxyl group at the terminal is as described above.
- diisocyanate compound there is no particular limitation on the diisocyanate compound, and any conventionally known one can be used. Specific examples include, for example, toluylene diisocyanate, 4,4′-diphenylmethane diisocyanate, hexamethylene diisocyanate, xylylene diisocyanate, metaxylylene diisocyanate, 1,5-naphthalene diisocyanate, hydrogenated diphenylmethane diisocyanate, hydrogenated toluylene diisocyanate, hydrogen. Examples thereof include xylylene diisocyanate and isophorone diisocyanate. These may be used alone or in combination of two or more. Moreover, you may use block isocyanate. From the viewpoint of obtaining superior weather resistance, it is preferable to use a diisocyanate compound having no aromatic ring, such as hexamethylene diisocyanate and hydrogenated diphenylmethane diisocyanate.
- the amount of the diisocyanate compound used is preferably 1 to 10 equivalents, more preferably 1 to 5 equivalents, relative to the terminal hydroxyl group of the vinyl polymer.
- the reaction solvent is not particularly limited, but an aprotic solvent is preferred.
- the reaction temperature is not particularly limited, but is preferably 0 to 250 ° C, more preferably 20 to 200 ° C.
- the amount of the compound represented by the general formula (5) to be used is preferably 1 to 10 equivalents, more preferably 1 to 5 equivalents, relative to the residual isocyanate group.
- the component (B) has at least one aliphatic branched structure and alicyclic aliphatic structure in the molecule, and the general formula (2): —OC (O) C (R b ) ⁇ CH 2 (2) (Wherein R b represents a hydrogen atom or an organic group having 1 to 20 carbon atoms)
- R b represents a hydrogen atom or an organic group having 1 to 20 carbon atoms
- R b same as the R a can be exemplified.
- the number of aliphatic branched structures is preferably 6 or less, the number of alicyclic aliphatic structures is preferably 5 or less, and the number of (meth) acryloyl groups is preferably 2 or less.
- the aliphatic branched structure is not particularly limited, but i-propyl group, i-butyl group, t-butyl group, isoheptyl group, 2-ethylhexyl group, i-nonyl group, i-decyl group, An i-undecyl group, an i-dodecyl group, and the like can be mentioned, and a t-butyl group is preferable from the viewpoints of the viscosity of the adhesive composition, adhesion to a substrate, and strength of the adhesive layer.
- Examples of the alicyclic aliphatic structure include a cycloalkyl ring, a bicycloalkyl ring, a tricycloalkyl ring, a cycloalkenyl ring, a bicycloalkenyl ring, a tricycloalkenyl ring, and an adamantyl ring.
- the group represented by the general formula (2) can be directly bonded to an alicyclic aliphatic group, or can be bonded via an alkylene group or an alkyloxylene group.
- Preferred components (B) include 4-isopropylcyclohexyl (meth) acrylate, 4-isopentyl (meth) acrylate, 4- (2-ethylhexyl)-(meth) acrylate, 4-isononyl (meth) acrylate, 4- Isodecyl (meth) acrylate, 4-isoundecyl (meth) acrylate, 4-isododecyl (meth) acrylate, 4-t-butylcyclohexyl (meth) acrylate, 2,4 di (t-butyl)-(meth) acrylate, 2, Examples include 4,6 tri (t-butyl)-(meth) acrylate.
- the component (B) may be used alone or in combination of two or more.
- Component (B) is added in an amount of preferably 1 to 500 parts, more preferably 2 to 300 parts, and more preferably 3 to 200 parts with respect to 100 parts of component (A) or the total of components (A) and (C). Is particularly preferred.
- dilution monomer in addition to the component (B), another dilution monomer different from the component (B) can be used in combination.
- examples of other dilution monomers include dicyclopentenyloxyethyl methacrylate, isobornyl acrylate, dicyclopentenyloxyethyl methacrylate, acryloylmorpholine, 2-hydroxyethyl methacrylate, (2-hydroxyethyl) methacrylate acid phosphate, dimethylacrylamide, and the like. Can be mentioned.
- the lower limit of the content of the component (B) in all the dilution monomers may be 10% by weight or more. Preferably, it is 20% by weight or more. Although an upper limit is not specifically limited, It is preferable that it is 90 weight% or less, and it is more preferable that it is 80 weight% or less. If it is less than 10% by weight, the adhesion to a hardly-adhesive substrate is insufficient, and if it exceeds 80% by weight, the cured product tends to be hard and peeling from the substrate tends to occur.
- a photoradical polymerization initiator is especially preferable.
- radical photopolymerization initiators are commercially available, and typical examples include Irgacure 651 (2,2-dimethoxy-1,2-diphenylethane-1-one), Irgacure 184 (1-hydroxy-cyclohexylphenyl).
- These initiators may be used alone or in combination of two or more.
- Component (D) is preferably added in an amount of 0.01 to 20 parts, more preferably 0.02 to 10 parts, based on 100 parts of component (A) or (A) and (C). .
- ⁇ (E) component Although there is no limitation in particular as a filler of (E) component, For example, wood powder, pulp, cotton chip, asbestos, glass fiber, carbon fiber, mica, walnut shell powder, rice husk powder, graphite, diatomaceous earth, white clay, dolomite Reinforcing fillers such as silicic anhydride, hydrous silicic acid, carbon black; heavy calcium carbonate, colloidal calcium carbonate, magnesium carbonate, diatomaceous earth, calcined clay, clay, talc, titanium oxide, alumina, bentonite, organic bentonite Fillers such as ferric oxide, iron powder, aluminum fine powder, flint powder, zinc oxide, activated zinc white, zinc dust, zinc carbonate and shirasu balloon; asbestos, glass fiber and glass filament, carbon fiber, Kevlar fiber And fibrous fillers such as polyethylene fiber.
- a filler of (E) component For example, wood powder, pulp, cotton chip, asbestos, glass fiber, carbon fiber, mica, walnut shell powder
- fillers silicic anhydride, carbon black, calcium carbonate, titanium oxide, talc and the like are preferable.
- a filler selected mainly from titanium oxide, calcium carbonate, talc, ferric oxide, zinc oxide, shirasu balloon, etc. may be added. it can.
- fillers may be used alone or in combination of two or more.
- the amount of component (E) added is preferably 1 to 1000 parts, more preferably 2 to 800 parts, more preferably 5 to 600 parts per 100 parts of component (A) or (A) and component (C). Part is particularly preferred.
- composition Various additives may be added as optional components to the composition of the present invention in order to adjust physical properties.
- the additive include an anti-aging agent, a plasticizer, a solvent, and an adhesion improver.
- antioxidants conventionally known antioxidants, light stabilizers, and the like can be used.
- the anti-aging agent can also be used for polymerization control during polymerization, and can control physical properties.
- Various types of antioxidants are known, and are described in, for example, “Antioxidant Handbook” published by Taiseisha, “Degradation and Stabilization of Polymer Materials” (235-242) published by CM Chemical. Although various things are mention
- thioethers such as MARK PEP-36 and MARK AO-23 (all manufactured by Adeka Gas Chemical Co., Ltd.), Irgafos 38, Irgafos 168, Irgafos P-EPQ (all manufactured by Nippon Ciba Specialty Chemicals), etc.
- examples thereof include phosphorus-based antioxidants. Of these, hindered phenol compounds as shown below are preferred.
- hindered phenol compound examples include the following. 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butyl-4-ethylphenol, mono (or di or tri) ( ⁇ methylbenzyl) phenol, 2,2′-methylenebis (4ethyl-6-tert-butylphenol), 2,2'-methylenebis (4methyl-6-tert-butylphenol), 4,4'-butylidenebis (3-methyl-6-tert-butylphenol), 4,4 ' -Thiobis (3-methyl-6-tert-butylphenol), 2,5-di-tert-butylhydroquinone, 2,5-di-tert-amylhydroquinone, triethylene glycol-bis- [3- (3-t- Butyl-5-methyl-4hydroxyphenyl) propionate], 1,6-hexanediol-bis [3- 3,5-di-t-butyl-4-hydroxyphenyl)
- monoacrylate phenolic antioxidants having both acrylate groups and phenol groups, nitroxide compounds and the like can be mentioned.
- monoacrylate phenolic antioxidants include 2-t-butyl-6- (3-t-butyl-2-hydroxy-5-methylbenzyl) -4-methylphenyl acrylate (trade name: Sumilizer GM), 2, Examples include 4-di-t-amyl-6- [1- (3,5-di-t-amyl-2-hydroxyphenyl) ethyl] phenyl acrylate (trade name: Sumilizer GS).
- Nitroxide compounds include, but are not limited to, cyclic hydroxyamines such as 2,2,6,6-substituted-1-piperidinyloxy radicals and 2,2,5,5-substituted-1-pyrrolidinyloxy radicals.
- the nitroxy free radicals from are illustrated.
- an alkyl group having 4 or less carbon atoms such as a methyl group or an ethyl group is suitable.
- nitroxy free radical compounds include, but are not limited to, 2,2,6,6-tetramethyl-1-piperidinyloxy radical (TEMPO), 2,2,6,6-tetraethyl-1- Piperidinyloxy radical, 2,2,6,6-tetramethyl-4-oxo-1-piperidinyloxy radical, 2,2,5,5-tetramethyl-1-pyrrolidinyloxy radical, 1, Examples include 1,3,3-tetramethyl-2-isoindolinyloxy radical and N, N-di-t-butylamineoxy radical.
- a stable free radical such as a galvinoxyl free radical may be used.
- Antioxidants may be used in combination with light stabilizers, and are particularly preferred because they can further exert their effects and in particular improve the heat resistance.
- Tinuvin C353, Tinuvin B75 (all of which are manufactured by Nippon Ciba Specialty Chemicals) or the like in which an antioxidant and a light stabilizer are mixed in advance may be used.
- Antiaging agents may be used alone or in combination of two or more.
- the addition amount of the anti-aging agent is preferably 0.01 to 10 parts, more preferably 0.02 to 5 parts, per 100 parts of the component (A) or the sum of the components (A) and (C).
- plasticizer examples include phthalic acid esters such as dibutyl phthalate, diheptyl phthalate, di (2-ethylhexyl) phthalate, and butyl benzyl phthalate depending on the purpose of adjusting physical properties and properties; dioctyl adipate, dioctyl sebacate Non-aromatic dibasic acid esters; polyalkylene glycol esters such as diethylene glycol dibenzoate and triethylene glycol dibenzoate; phosphate esters such as tricresyl phosphate and tributyl phosphate; chlorinated paraffins; alkyl diphenyl; partial water Hydrocarbon oils such as added terphenyl can be used alone or in admixture of two or more, but this is not always necessary. These plasticizers can also be blended at the time of polymer production.
- phthalic acid esters such as dibutyl phthalate, diheptyl phthalate, di (2-ethyl
- the solvent may be optionally used for the purpose of reducing the viscosity of the formulation and improving workability.
- the solvent those having a boiling point of 50 to 180 ° C. are usually preferred because of excellent workability during coating and drying before and after curing.
- alcohol solvents such as methanol, ethanol, isopropanol, n-butanol, isobutanol; methyl acetate, ethyl acetate, butyl acetate, ethylene glycol monoethyl ether, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether, etc.
- Ester solvents such as acetone, methyl ethyl ketone, and methyl isobutyl ketone; aromatic solvents such as toluene and xylene; and cyclic ether solvents such as dioxane. These solvents may be used alone or in combination of two or more.
- adhesion improver examples include alkyl alkoxysilanes such as methyltrimethoxysilane, dimethyldimethoxysilane, trimethylmethoxysilane, and n-propyltrimethoxysilane; dimethyldiisopropenoxysilane, methyltriisopropeno Alkyl isopropenoxy silane such as xy silane, ⁇ -glycidoxy propyl methyl diisopropenoxy silane, ⁇ -glycidoxy propyl methyl dimethoxy silane, ⁇ -glycidoxy propyl trimethoxy silane, vinyl trimethoxy silane, vinyl dimethyl Methoxysilane, ⁇ -aminopropyltrimethoxysilane, N- ( ⁇ -aminoethyl) - ⁇ -aminopropyltrimethoxysilane, N- ( ⁇ -aminoethyl) - ⁇ -aminopropyltrimethoxysi
- the addition amount of the adhesion improver is preferably 0.01 to 20 parts, preferably 0.1 to 20 parts per 100 parts of component (A) or (A) and component (C). 10 parts is more preferred.
- the method of hardening with an active energy ray is preferable.
- the active energy rays mentioned here refer to, for example, visible light, ultraviolet rays, infrared rays, X-rays, ⁇ rays, ⁇ rays, ⁇ rays, electron beams, and the like. From the viewpoint of obtaining a particularly good cured product, a curing method using ultraviolet rays or electron beams is more preferable.
- the composition contains a radical photopolymerization initiator (D) as necessary.
- polymerization inhibitors such as hydroquinone, hydroquinone monomethyl ether, benzoquinone, para-tertiary butyl catechol and the like can be added as necessary.
- a near-infrared light absorptive cationic dye as a near-infrared photoinitiator.
- near-infrared light absorbing cationic dye near-infrared light which is excited by light energy in the region of 650 to 1500 nm, for example, disclosed in JP-A-3-111402, JP-A-5-194619, etc. It is preferable to use an absorbing cationic dye-borate anion complex or the like, and it is more preferable to use a boron sensitizer together.
- the source of active energy rays there is no particular limitation on the source of active energy rays, but depending on the nature of the photopolymerization initiator, for example, high-pressure mercury lamp, low-pressure mercury lamp, electron beam irradiation device, halogen lamp, light-emitting diode, semiconductor laser, etc. Irradiation.
- composition of the present invention is suitable when a difficult-to-adhere substrate that has been difficult to give strong adhesion with conventional adhesives is used as an adherend.
- the difficult-to-adhere substrate mentioned here include thermoplastic resins, glass, magnesium alloys, aluminum alloys, and the like.
- thermoplastic resins those called engineering plastics or super engineering plastics are often poor in adherence, so that the composition of the present invention can be used preferably.
- engineering plastics or super engineering plastics include polycarbonate (PC), polycycloolefin (COP), polyamide 6 (PA6), polyamide 66 (PA66), polyacetal (POM), modified polyphenylene ether (m-PPE), and polybutylene.
- PBT Terephthalate
- GF-PET GF reinforced polyethylene terephthalate
- UHMW-PE ultra high molecular weight polyethylene
- PSF polysulfone
- PES polyethersulfone
- PES polyphenylene sulfide
- PAR amorphous polyarylate
- PAI polyamideimide
- PEI polyetherimide
- PEEK polyetheretherketone
- LCP liquid crystal polymer
- T I polybenzimidazole
- TPX polymethylbenzene
- PCT polycyclohexanedimethylene terephthalate
- PA46 polyamide 6T
- PA6T polyamide 9T
- PA9T polyamide 11,12 (PA11) 12
- MXD6 syndiotactic polystyrene
- SPS syndiotactic polystyrene
- composition of the present invention can be preferably used.
- Examples of the glass include soda lime glass, crystal glass, quartz glass, and borosilicate glass.
- magnesium alloys examples include AZ alloys containing aluminum and zinc as trace components, and LA alloys containing lithium and aluminum as trace components.
- Examples of the aluminum alloy include duralumin.
- the hardly-adhesive base material is often used for optical members described below from the viewpoints of heat resistance, lightness, transparency, and the like. Therefore, the adhesive composition of the present invention can be suitably used for bonding optical members.
- the adhesion of the optical member is, for example, bonding of the optical members, fixing adhesion of the optical member to another substrate, or the like.
- the optical member include a pickup lens used in a recording / reproducing apparatus for an optical disk such as a DVD or a BD and its peripheral material, a peripheral material for a recording / reproducing laser; a digital camera, a digital video camera, a projector, an image sensor, a mobile phone.
- Imaging device CCD, CMOS used in PHS, etc., flexible printed circuit board (FPC) around the lens, imaging device peripheral material; optical communication system (optical switch, optical connector, optical fiber, optical waveguide, light receiving) Various components used in devices, laser light sources, etc .; Light emitting diode (LED) chips; Backlights used in flat panel displays (FPD) and their peripheral materials, LEDs, FPCs; Peripheral materials for solid lasers and semiconductor lasers ( Lens, reflector, prism, light Filter, shutter, light receiving elements, wave plates, etc. polarizing plate) may be mentioned such. Peripheral materials here refer to materials that come into contact with lenses, lasers, elements, etc. and their housings.
- the above-mentioned difficult-to-adhere base material is often used not only for optical members but also for other members. It is possible to use.
- members of a recording / reproducing apparatus for an optical disk that can use the adhesive composition of the present invention as an adhesive include a pickup optical system and its peripheral materials, specifically a pickup objective lens, a collimator lens, and a cylindrical lens.
- actuator peripheral materials specifically magnets, coils, yokes, resin parts for driving, housings, etc .
- laser light sources Peripheral materials, specifically lenses, reflectors, prisms, optical filters, shutters, light receiving elements, wave plates, polarizing plates, etc .
- hard disk drive (HDD) peripheral materials specifically spindle motor members (magnets, coils) , Bearings, shafts, connectors, etc.), for magnetic head actuators Such as wood; also, like housing in general for these components and the like.
- number average molecular weight and “molecular weight distribution (ratio of weight average molecular weight to number average molecular weight)” were calculated by a standard polystyrene conversion method using gel permeation chromatography (GPC). However, a GPC column packed with polystyrene cross-linked gel (shodex GPC K-804 and K-802.5; manufactured by Showa Denko KK) and chloroform as a GPC solvent were used.
- average number of terminal (meth) acryloyl groups is “number of (meth) acryloyl groups introduced per molecule of polymer”, and the number average molecular weight determined by 1 H-NMR analysis and GPC. Calculated. However, 1 H-NMR was measured at 23 ° C. using ASX-400 manufactured by Bruker and using deuterated chloroform as a solvent.
- Table 1 shows the amount of each raw material used.
- Acrylic acid ester (premixed acrylic acid ester) was deoxygenated.
- the inside of the stainless steel reaction vessel equipped with a stirrer was deoxygenated, and cuprous bromide and a part of the total acrylic ester (described as the initial charge monomer in Table 1) were charged and stirred with heating.
- Acetonitrile (described as “Acetonitrile for polymerization” in Table 1), diethyl 2,5-dibromoadipate (DBAE) or ethyl 2-bromobutyrate as an initiator were added and mixed, and the temperature of the mixture was adjusted to about 80 ° C.
- DBAE diethyl 2,5-dibromoadipate
- ethyl 2-bromobutyrate ethyl 2-bromobutyrate
- Pentamethyldiethylenetriamine (hereinafter abbreviated as triamine) was added to initiate the polymerization reaction.
- the remaining acrylic ester (described as an additional monomer in Table 1) was added sequentially to proceed the polymerization reaction.
- triamine was appropriately added to adjust the polymerization rate.
- the total amount of triamine used during the polymerization is shown in Table 1 as a triamine for polymerization. As the polymerization proceeds, the internal temperature rises due to the heat of polymerization.
- Example 1 3A part of the polymer [P1] obtained in Production Example 1 as the component (A), 22.6 parts of the component [P2] as the component (C), t-butylcyclohexyl methacrylate as the component (B) (trade name TBCHMA) Manufactured by Nippon Oil & Fats Co., Ltd.
- spherical silica having an average particle size of 1.3 to 2.0 ⁇ m (trade name; SOC5, manufactured by Admatech) as a component (E)
- spherical silica having an average particle size of 6 ⁇ m (trade name: FB301, manufactured by Denki Kagaku Kogyo) 180 parts were added and kneaded with the mixer for 16 hours to obtain a curable composition for adhesives.
- the formulation of the adhesive composition is shown in Table 2. After measuring the viscosity of the obtained adhesive composition at 23 ° C., it was poured into a cylindrical mold and UV-cured with an integrated light amount of 6000 mJ / cm 2 . Using this cured product, DuroD hardness and cure shrinkage were measured. Further, a shear sample of polycarbonate and each substrate was prepared by UV curing under irradiation conditions of 6000 mJ / cm 2 and the strength was measured. The results are shown in Tables 2 and 3.
- Curing shrinkage was calculated by the following formula. (Specific gravity of cured product ⁇ liquid specific gravity of adhesive before curing) / specific gravity of cured product * 100
- Examples 2 to 7, Comparative Examples 1 to 5 In the same manner as in Example 1, adhesive compositions having the formulations shown in Tables 2 and 3 were prepared, and the above physical properties were measured. The results are shown in Tables 4 and 5.
- the vinyl polymer (A) component and / or the adhesive using the component (C) and the component (B) shown in the claims are monomers other than the component (B). Compared to the case where is used, better substrate adhesion and cure shrinkage are shown.
- the adhesive composition for difficult-to-adhere base materials of the present invention can be obtained by adding a vinyl monomer having a specific alicyclic aliphatic structure and an initiator to a vinyl polymer, and a filler as necessary. Adhesiveness with respect to a substrate that has been difficult to bond is improved, and is suitable for use as an adhesive for optical members.
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Abstract
Description
(A)一般式(1):
-OC(O)C(Ra)=CH2 (1)
(式中、Raは水素原子又は炭素数1~20の有機基を表わす)
で表わされる基を1個より多く有する反応性オリゴマー、および
(B)脂肪族分岐構造および脂環式脂肪族構造を分子内にそれぞれ少なくとも1つ有し、かつ
一般式(2):
-OC(O)C(Rb)=CH2 (2)
(式中、Rbは水素原子又は炭素数1~20の有機基を表わす)
で表わされる基を分子末端に1個以上有する化合物
を必須成分として含有してなることを特徴とする難接着基材用接着剤組成物に関する。
-OC(O)C(Rc)=CH2 (3)
(式中、Rcは水素原子又は炭素数1~20の有機基を表わす)
で表わされる基を平均して1分子あたり分子末端に1個以下有するビニル系重合体を含有することが好ましい。
(A)成分は、一般式(1):
-OC(O)C(Ra)=CH2 (1)
(式中、Raは水素原子または炭素数1~20の有機基を表わす)
で表わされる基((メタ)アクリロイル系基)を1個より多く有する反応性オリゴマーである。硬化性、プロセス性の観点から光ラジカル硬化性オリゴマーであることが好ましく、(メタ)アクリロイル系基は、架橋させるという観点から2個以上有することが好ましい。ここで、2個以上とは、すべての(A)成分が(メタ)アクリロイル系基を2個以上有する必要はなく、平均して好ましくは1.2個以上、より好ましくは1.5以上、さらに好ましくは1.7以上有していれば良い。また、(メタ)アクリロイル系基は、好ましくは10個以下、より好ましくは6個以下、さらに好ましくは5個以下である。
(C)成分は、一般式(3)
-OC(O)C(Rc)=CH2 (3)
(式中、Rcは水素原子又は炭素数1~20の有機基を表わす)
で表わされる基((メタ)アクリロイル系基)を平均して1分子あたり1個以下、分子末端に有するビニル系重合体である。(メタ)アクリロイル系基を1個有し、該置換基が分子末端に存在することが、硬化後のゴム弾性の点から好ましい。Rcについては、前記Raと同じものが例示される。
(A)成分および(C)成分の製法については特に限定はない。
(式中、R1、R2は水素原子、炭素数1~20のアルキル基、炭素数6~20のアリール基または炭素数7~20のアラルキル基、Xは塩素原子、臭素原子またはヨウ素原子)
R3-C6H4-SO2X
(式中、R3は水素原子、炭素数1~20のアルキル基、炭素数6~20のアリール基または炭素数7~20のアラルキル基、Xは塩素原子、臭素原子またはヨウ素原子)
などがあげられる。
R6R7C(X)-R8-R9-C(R5)=CH2 (4)
(式中、R5は水素原子またはメチル基、R6、R7は水素原子、炭素数1~20のアルキル基、炭素数6~20のアリール基、炭素数7~20のアラルキル基または他端において相互に連結したもの、R8は-C(O)O-(エステル基)、-C(O)-(ケト基)、またはo-,m-,p-フェニレン基、R9は直接結合または1個以上のエーテル結合を含有していてもよい炭素数1~20の2価の有機基、Xは塩素原子、臭素原子またはヨウ素原子)
で示されるものが例示される。
XCH2C(O)O(CH2)nCH=CH2、
H3CC(H)(X)C(O)O(CH2)nCH=CH2、
(H3C)2C(X)C(O)O(CH2)nCH=CH2、
CH3CH2C(H)(X)C(O)O(CH2)nCH=CH2
XCH2C(O)O(CH2)nO(CH2)mCH=CH2、
H3CC(H)(X)C(O)O(CH2)nO(CH2)mCH=CH2、
(H3C)2C(X)C(O)O(CH2)nO(CH2)mCH=CH2、
CH3CH2C(H)(X)C(O)O(CH2)nO(CH2)mCH=CH2
o,m,p-XCH2-C6H4-(CH2)n-CH=CH2、
o,m,p-CH3C(H)(X)-C6H4-(CH2)n-CH=CH2、
o,m,p-CH3CH2C(H)(X)-C6H4-(CH2)n-CH=CH2
(以上の式中、Xは塩素原子、臭素原子またはヨウ素原子、nは0~20の整数)
o,m,p-XCH2-C6H4-(CH2)n-O-(CH2)m-CH=CH2、
o,m,p-CH3C(H)(X)-C6H4-(CH2)n-O-(CH2)m-CH=CH2、
o,m,p-CH3CH2C(H)(X)-C6H4-(CH2)n-O-(CH2)mCH=CH2
(以上の式中、Xは塩素原子、臭素原子またはヨウ素原子、nは1~20の整数、mは0~20の整数)
o,m,p-XCH2-C6H4-O-(CH2)n-CH=CH2、
o,m,p-CH3C(H)(X)-C6H4-O-(CH2)n-CH=CH2、
o,m,p-CH3CH2C(H)(X)-C6H4-O-(CH2)n-CH=CH2
(以上の式中、Xは塩素原子、臭素原子またはヨウ素原子、nは0~20の整数)
o,m,p-XCH2-C6H4-O-(CH2)n-O-(CH2)m-CH=CH2、
o,m,p-CH3C(H)(X)-C6H4-O-(CH2)n-O-(CH2)m-CH=CH2、
o,m,p-CH3CH2C(H)(X)-C6H4-O-(CH2)n-O-(CH2)m-CH=CH2
(以上の式中、Xは塩素原子、臭素原子またはヨウ素原子、nは1~20の整数、mは0~20の整数)
などが挙げられる。
H2C=C(R5)-R9-C(R6)(X)-R10-R7 (5)
(式中、R5、R6、R7、R9、Xは前記に同じ、R10は、直接結合、-C(O)O-(エステル基)、-C(O)-(ケト基)またはo-,m-,p-フェニレン基を表わす)
で示される化合物などがあげられる。
CH2=CHCH2X、CH2=C(CH3)CH2X、
CH2=CHC(H)(X)CH3、CH2=C(CH3)C(H)(X)CH3、
CH2=CHC(X)(CH3)2、CH2=CHC(H)(X)C2H5、
CH2=CHC(H)(X)CH(CH3)2、
CH2=CHC(H)(X)C6H5、CH2=CHC(H)(X)CH2C6H5、
CH2=CHCH2C(H)(X)-CO2R、
CH2=CH(CH2)2C(H)(X)-CO2R、
CH2=CH(CH2)3C(H)(X)-CO2R、
CH2=CH(CH2)8C(H)(X)-CO2R、
CH2=CHCH2C(H)(X)-C6H5、
CH2=CH(CH2)2C(H)(X)-C6H5、
CH2=CH(CH2)3C(H)(X)-C6H5
(以上の式中、Xは塩素原子、臭素原子またはヨウ素原子、Rは炭素数1~20のアルキル基、アリール基、アラルキル基)
などが挙げられる。
o-,m-,p-CH2=CH-(CH2)n-C6H4-SO2X、
o-,m-,p-CH2=CH-(CH2)n-O-C6H4-SO2X
(以上の式中、Xは塩素原子、臭素原子またはヨウ素原子、nは0~20の整数)
などが挙げられる。
R6R7C(X)-R8-R9-C(H)(R5)CH2-[Si(R11)2-b(Y)bO]m-Si(R12)3-a(Y)a (6)
(式中、R5、R6、R7、R8、R9、Xは前記に同じ、R11、R12は、いずれも炭素数1~20のアルキル基、アリール基、アラルキル基、または(R’)3SiO-(R’は炭素数1~20の1価の炭化水素基であって、3個のR’は同一であってもよく、異なっていてもよい)で示されるトリオルガノシロキシ基を示し、R11またはR12が2個以上存在するとき、それらは同一であってもよく、異なっていてもよい、Yは水酸基または加水分解性基を示し、Yが2個以上存在するときそれらは同一であってもよく、異なっていてもよい、aは0、1、2または3、bは0、1または2、mは0~19の整数、ただし、a+mb≧1であることを満足する)
に示すものが例示される。
XCH2C(O)O(CH2)nSi(OCH3)3、
CH3C(H)(X)C(O)O(CH2)nSi(OCH3)3、
(CH3)2C(X)C(O)O(CH2)nSi(OCH3)3、
XCH2C(O)O(CH2)nSi(CH3)(OCH3)2、
CH3C(H)(X)C(O)O(CH2)nSi(CH3)(OCH3)2、
(CH3)2C(X)C(O)O(CH2)nSi(CH3)(OCH3)2
(以上の式中、Xは塩素原子、臭素原子またはヨウ素原子、nは0~20の整数)
XCH2C(O)O(CH2)nO(CH2)mSi(OCH3)3、
H3CC(H)(X)C(O)O(CH2)nO(CH2)mSi(OCH3)3、
(H3C)2C(X)C(O)O(CH2)nO(CH2)mSi(OCH3)3、
CH3CH2C(H)(X)C(O)O(CH2)nO(CH2)mSi(OCH3)3、
XCH2C(O)O(CH2)nO(CH2)mSi(CH3)(OCH3)2、
H3CC(H)(X)C(O)O(CH2)nO(CH2)m-Si(CH3)(OCH3)2、
(H3C)2C(X)C(O)O(CH2)nO(CH2)m-Si(CH3)(OCH3)2、
CH3CH2C(H)(X)C(O)O(CH2)nO(CH2)m-Si(CH3)(OCH3)2
(以上の式中、Xは塩素原子、臭素原子またはヨウ素原子、nは1~20の整数、mは0~20の整数)
o,m,p-XCH2-C6H4-(CH2)2Si(OCH3)3、
o,m,p-CH3C(H)(X)-C6H4-(CH2)2Si(OCH3)3、
o,m,p-CH3CH2C(H)(X)-C6H4-(CH2)2Si(OCH3)3、
o,m,p-XCH2-C6H4-(CH2)3Si(OCH3)3、
o,m,p-CH3C(H)(X)-C6H4-(CH2)3Si(OCH3)3、
o,m,p-CH3CH2C(H)(X)-C6H4-(CH2)3Si(OCH3)3、
o,m,p-XCH2-C6H4-(CH2)2-O-(CH2)3Si(OCH3)3、
o,m,p-CH3C(H)(X)-C6H4-(CH2)2-O-(CH2)3Si(OCH3)3、
o,m,p-CH3CH2C(H)(X)-C6H4-(CH2)2-O-(CH2)3Si(OCH3)3、
o,m,p-XCH2-C6H4-O-(CH2)3Si(OCH3)3、
o,m,p-CH3C(H)(X)-C6H4-O-(CH2)3Si(OCH3)3、
o,m,p-CH3CH2C(H)(X)-C6H4-O-(CH2)3-Si(OCH3)3、
o,m,p-XCH2-C6H4-O-(CH2)2-O-(CH2)3-Si(OCH3)3、
o,m,p-CH3C(H)(X)-C6H4-O-(CH2)2-O-(CH2)3Si(OCH3)3、
o,m,p-CH3CH2C(H)(X)-C6H4-O-(CH2)2-O-(CH2)3Si(OCH3)3
(以上の式中、Xは塩素原子、臭素原子またはヨウ素原子)
などが挙げられる。
(R12)3-a(Y)aSi-[OSi(R11)2-b(Y)b]m-CH2-C(H)(R5)-R9-C(R6)(X)-R10-R7(7)
(式中、R5、R6、R7、R9、R10、R11、R12、a、b、X、Yは前記に同じ、mは0~19の整数)
で示されるものが例示される。
(CH3O)3SiCH2CH2C(H)(X)C6H5、
(CH3O)2(CH3)SiCH2CH2C(H)(X)C6H5、
(CH3O)3Si(CH2)2C(H)(X)-CO2R、
(CH3O)2(CH3)Si(CH2)2C(H)(X)-CO2R、
(CH3O)3Si(CH2)3C(H)(X)-CO2R、
(CH3O)2(CH3)Si(CH2)3C(H)(X)-CO2R、
(CH3O)3Si(CH2)4C(H)(X)-CO2R、
(CH3O)2(CH3)Si(CH2)4C(H)(X)-CO2R、
(CH3O)3Si(CH2)9C(H)(X)-CO2R、
(CH3O)2(CH3)Si(CH2)9C(H)(X)-CO2R、
(CH3O)3Si(CH2)3C(H)(X)-C6H5、
(CH3O)2(CH3)Si(CH2)3C(H)(X)-C6H5、
(CH3O)3Si(CH2)4C(H)(X)-C6H5、
(CH3O)2(CH3)Si(CH2)4C(H)(X)-C6H5
(以上の式中、Xは塩素原子、臭素原子またはヨウ素原子、Rは炭素数1~20のアルキル基、アリール基、アラルキル基)
などが挙げられる。
HO-(CH2)n-OC(O)C(H)(R)(X)
(式中、Xは塩素原子、臭素原子またはヨウ素原子、Rは水素原子または炭素数1~20のアルキル基、アリール基、アラルキル基、nは1~20の整数)
前記アミノ基を有する有機ハロゲン化物またはハロゲン化スルホニル化合物には特に限定はなく、下記のようなものが例示される。
H2N-(CH2)n-OC(O)C(H)(R)(X)
(式中、Xは塩素原子、臭素原子またはヨウ素原子、Rは水素原子または炭素数1~20のアルキル基、アリール基、アラルキル基、nは1~20の整数)
前記エポキシ基を有する有機ハロゲン化物またはハロゲン化スルホニル化合物には特に限定はなく、下記のようなものが例示される。
(A)成分、(C)成分の製造方法には特に限定はないが、例えば前述の方法により反応性官能基を有するビニル系重合体を製造し、反応性官能基を(メタ)アクリロイル系基を有する置換基に変換することにより製造することができる。
末端にハロゲン基を有するビニル系重合体と、一般式(8):
M+-OC(O)C(Rd)=CH2 (8)
(式中、Rdは水素原子または炭素数1~20の有機基を表わす、M+はアルカリ金属イオンまたは4級アンモニウムイオンを表わす)
で示される化合物との反応による方法。
-CR13R14X (9)
(式中、R13、R14はビニル系モノマーのエチレン性不飽和基に結合した基、Xは塩素原子、臭素原子またはヨウ素原子を表わす)
で示される末端基を有するものが好ましい。
末端に水酸基を有するビニル系重合体と、一般式(10):
X1C(O)C(Rd)=CH2 (10)
(式中、Rdは水素原子または炭素数1~20の有機基を表わす、X1は塩素原子、臭素原子または水酸基を表わす)
で示される化合物との反応による方法。
末端に水酸基を有するビニル系重合体に、ジイソシアネート化合物を反応させ、残存イソシアネート基と一般式(11):
HO-R’-OC(O)C(Rd)=CH2 (11)
(式中、Rdは水素原子または炭素数1~20の有機基を表わす、R’は炭素数2~20の2価の有機基を表わす)
で示される化合物との反応による方法。
導入方法1は、末端にハロゲン基を有するビニル系重合体と、一般式(8)で示される化合物との反応による方法である。
導入方法2は、末端に水酸基を有するビニル系重合体と、一般式(10)で示される化合物との反応による方法である。
H2C=C(R15)-R16-R17-OH (12)
(式中、R15は水素原子または炭素数1~20の有機基、R16は-C(O)O-(エステル基)またはo-、m-もしくはp-フェニレン基、R17は直接結合または1個以上のエーテル結合を含有していてもよい炭素数1~20の2価の有機基を表わす)
で示される一分子中に重合性のアルケニル基および水酸基を併せもつ化合物などを第2のモノマーとして反応させる方法。
H2C=C(R15)-R18-OH (13)
(式中、R13は前記と同じ、R18は1個以上のエーテル結合を有していてもよい炭素数1~20の2価の有機基を表わす)
に示される化合物などがあげられる。
M+C-(R19)(R20)-R18-OH (14)
(式中、R18およびM+は前記と同じ、R19、R20はともにカルバニオンC-を安定化する電子吸引基または一方が前記電子吸引基で、他方が水素原子、炭素数1~10のアルキル基またはフェニル基を表わす)
で示される水酸基を有する安定化カルバニオンなどを反応させてハロゲンを置換する方法。
HO-R18-O-M+ (15)
(式中、R18およびM+は前記と同じ)
で表わされる水酸基含有化合物などや、
一般式(16):
HO-R18-C(O)O-M+(16)
(式中、R18およびM+は前記と同じ)
で示される水酸基含有化合物などを反応させて、前記ハロゲン原子を水酸基含有置換基に置換する方法。
導入方法3は、末端に水酸基を有するビニル系重合体に、ジイソシアネート化合物を反応させ、残存イソシアネート基と一般式(11):
HO-R’-OC(O)C(Rd)=CH2 (11)
(式中、Rdは水素原子または炭素数1~20の有機基を表わす、R’は炭素数2~20の2価の有機基を表わす)
で示される化合物との反応による方法である。
(B)成分は、脂肪族分岐構造および脂環式脂肪族構造を分子内にそれぞれ少なくとも1つ有し、かつ一般式(2):
-OC(O)C(Rb)=CH2 (2)
(式中、Rbは水素原子又は炭素数1~20の有機基を表わす)
で表される基を分子末端に1個以上有する化合物であって、希釈モノマーとして機能する成分である。Rbについては、前記Raと同じものが例示される。脂肪族分岐構造は6個以下が、脂環式脂肪族構造は5個以下が、(メタ)アクリロイル系基は2個以下が好ましい。
(D)成分の重合開始剤についてとくに制限はないが、光ラジカル重合開始剤がとくに好ましい。例えば、ベンゾフェノン、アセトフェノン、プロピオフェノン、キサントール、フルオレイン、ベンズアルデヒド、アントラキノン、カンファーキノン、トリフェニルアミン、カルバゾール、3-メチルアセトフェノン、4-メチルアセトフェノン、3-ペンチルアセトフェノン、4-メトキシアセトフェノン、3-ブロモアセトフェノン、4-アリルアセトフェノン、p-ジアセチルベンゼン、3-メトキシベンゾフェノン、4-クロロ-4-ベンジルベンゾフェノン、3-クロロキサントン、3,9-ジクロロキサントン、3-クロロ-8-ノニルキサントン、2,4-ジエチルチオキサントン、イソプロピルチオキサントン、ベンゾイル、ベンゾインメチルエーテル、ビス(4-ジメチルアミノフェニル)ケトン、ベンジルメトキシケタール、2-クロロチオキサントン、2,4,6-トリメチルベンゾイルフェニルフォスフィンオキサイドなどが挙げられる。また、光ラジカル重合開始剤は商業的にも入手可能で、代表的なものとしてはIrgacure651(2,2-ジメトキシ-1,2-ジフェニルエタン-1-オン)、Irgacure184(1-ヒドロキシ-シクロヘキシルフェニルケトン)、Darocur1173(2-ヒドロキシ-2-メチル-1-フェニルプロパン-1-オン)、Irgacure2959(1-[4-(2-ヒドロキシエトキシ)-フェニル]-2-ヒドロキシ-2-メチル-1-プロパン-1-オン)、Irgacure127(2-ヒドロキシ-1-{4-[4-(2-ヒドロキシ-2-メチルプロピオニル)ベンジル]フェニル}-2-メチルプロパン-1-オン)、Darocur MBF(フェニルグリオキシリックアシッドメチルエステル)、Irgacure907(2-メチル-1-[4-(メチルチオ)フェニル]-2-モルフォリノプロパン-1-オン)、Irgacure369(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)ブタン-1-オン)、Irgacure379(2-ジメチルアミノ-2-(4-メチルベンジル)-1-(4-モルフォリン-4-イルフェニル)ブタン-1-オン)、Irgacure819(ビス(2,4,6-トリメチルベンゾイル)フェニルフォスフィンオキサイド)、Darocur TPO(2,4,6-トリメチルベンゾイルフェニルフォスフィンオキサイド)(以上、チバスペシャリティケミカルズ製)、KAYACURE BMS([4-(チルフェニルチオ)フェニル]フェニルメタノン)、KAYACURE 2-EAQ(エチルアントラキノン)(以上日本化薬製)、BIPE(ベンゾインイソプロピルエーテル)、BIBE(ベンゾインイソブチルエーテル)、NBCA(10-ブチル-2-クロロアクリドン)(以上黒金化成製)、ESACURE KIP150シリーズ(オリゴ{2-ヒドロキシ-2-メチル-1-[4-(1-メチルビニル)フェニル]プロパノン}およびその混合物)(Lamberti製)などが挙げられる。
(E)成分の充填材としてとくに限定はないが、例えば、木粉、パルプ、木綿チップ、アスベスト、ガラス繊維、炭素繊維、マイカ、クルミ殻粉、もみ殻粉、グラファイト、ケイソウ土、白土、ドロマイト、無水ケイ酸、含水ケイ酸、カーボンブラックのような補強性充填材;重質炭酸カルシウム、膠質炭酸カルシウム、炭酸マグネシウム、ケイソウ土、焼成クレー、クレー、タルク、酸化チタン、アルミナ、ベントナイト、有機ベントナイト、酸化第二鉄、べんがら、アルミニウム微粉末、フリント粉末、酸化亜鉛、活性亜鉛華、亜鉛末、炭酸亜鉛およびシラスバルーンなどのような充填材;石綿、ガラス繊維およびガラスフィラメント、炭素繊維、ケブラー繊維、ポリエチレンファイバーなどのような繊維状充填材などがあげられる。これら充填材のうちでは無水ケイ酸、カーボンブラック、炭酸カルシウム、酸化チタン、タルクなどが好ましい。また、低強度で伸びが大である硬化物を得たい場合には、主に酸化チタン、炭酸カルシウム、タルク、酸化第二鉄、酸化亜鉛およびシラスバルーンなどから選ばれる充填材を添加することができる。
本発明の組成物には、物性を調整するために各種添加剤を任意成分として添加してもよい。添加剤の例としては、老化防止剤、可塑剤、溶剤、接着性改良剤などがあげられる。
組成物の硬化方法についてはとくに限定は無いが、活性エネルギー線により硬化させる方法が好ましい。ここで言う活性エネルギー線とは、例えば可視光、紫外線、赤外線、X線、α線、β線、γ線、電子線等を指す。とくに良好な硬化物を得る観点から、紫外線や電子線を用いた硬化方法がより好ましい。
本発明の組成物は従来の接着剤では強い接着性を与えることが困難であった難接着基材を被着体として用いる場合に適している。ここで言う難接着基材としては、例えば熱可塑性樹脂、ガラス、マグネシウム合金、アルミニウム合金などがあげられる。
近年、以下に述べる光学部材には、耐熱性、軽量性や透明性などの観点から前記難接着基材が用いられる場合が多い。したがって、本発明の接着剤組成物が光学部材の接着に好適に用いることが可能である。光学部材の接着とは、例えば光学部材同士の接合、光学部材の他基材への固定接着などのことである。光学部材としては例えば、DVDやBDなどの光学ディスク用記録再生装置に使用されるピックアップレンズおよびその周辺材料、記録再生用レーザーの周辺材料;デジタルカメラ、デジタルビデオカメラ、プロジェクタ、イメージセンサ、携帯電話およびPHSなどに使用される撮像素子(CCD、CMOS)部のレンズ、レンズ周辺のフレキシブルプリント基板(FPC)、撮像素子周辺材料;光通信システム(光スイッチ、光コネクタ、光ファイバ、光導波路、受光素子、レーザー光源など)に使用される各種部材;発光ダイオード(LED)チップ;フラットパネルディスプレイ(FPD)に使用されるバックライトおよびその周辺材料、LED、FPC;固体レーザーや半導体レーザーの周辺材料(レンズ、反射鏡、プリズム、光学フィルタ、シャッター、受光素子、波長板、偏光板など)などがあげられる。ここでいう周辺材料とは、レンズ、レーザー、素子などに接する材料およびそれらの筐体のことを指す。
各原料の使用量を表1に示す。
アクリル酸エステル(予め混合されたアクリル酸エステル)を脱酸素した。攪拌機付ステンレス製反応容器の内部を脱酸素し、臭化第一銅、全アクリル酸エステルの一部(表1では初期仕込みモノマーとして記載)を仕込み、加熱攪拌した。アセトニトリル(表1では重合用アセトニトリルと記載)、開始剤としてジエチル2,5-ジブロモアジペート(DBAE)または2-ブロモブチル酸エチルを添加、混合し、混合液の温度を約80℃に調節した段階でペンタメチルジエチレントリアミン(以下、トリアミンと略す)を添加し、重合反応を開始した。残りのアクリル酸エステル(表1では追加モノマーとして記載)を逐次添加し、重合反応を進めた。重合途中、適宜トリアミンを追加し、重合速度を調整した。重合時に使用したトリアミンの総量を重合用トリアミンとして表1に示す。重合が進行すると重合熱により内温が上昇するので内温を約80℃~約90℃に調整しながら重合を進行させた。
モノマー転化率(重合反応率)が約95%以上の時点で反応容器気相部に酸素‐窒素混合ガスを導入した。内温を約80℃~約90℃に保ちながらしながら反応液を数時間加熱攪拌して反応液中の重合触媒と酸素を接触させた。アセトニトリル及び未反応のモノマーを減圧脱揮して除去し、重合体を含有する濃縮物を得た。濃縮物は著しく着色していた。
酢酸ブチルを重合体の希釈溶媒として使用した。重合体100kgに対して100~150kg程度の酢酸ブチルで(2)の濃縮物を希釈し、ろ過助剤(ラジオライトR900、昭和化学工業製)および/または吸着剤(キョーワード700SEN、キョーワード500SH)を添加した。反応容器気相部に酸素-窒素混合ガスを導入した後、約80℃で数時間加熱攪拌した。不溶な触媒成分をろ過除去した。ろ液は重合触媒残渣によって着色および若干の濁りを有していた。
ろ液を攪拌機付ステンレス製反応容器に仕込み、吸着剤(キョーワード700SEN、キョーワード500SH)を添加した。気相部に酸素-窒素混合ガスを導入して約100℃で数時間加熱攪拌した後、吸着剤等の不溶成分をろ過除去した。ろ液はほとんど無色透明な清澄液であった。ろ液を濃縮し、ほぼ無色透明の重合体を得た。
重合体100kgをN,N-ジメチルアセトアミド(DMAC)約100kgに溶解し、アクリル酸カリウム(製造例1においては、末端Br基に対して約2モル当量、製造例2においては、末端Br基に対して約1モル当量)、熱安定剤(H-TEMPO:4-ヒドロキシ-2,2,6,6-テトラメチルピペリジン-n-オキシル)、吸着剤(キョーワード700SEN)、を添加し、約70℃で数時間加熱攪拌した。DMACを減圧留去し、重合体濃縮物を重合体100kgに対して約100kgのトルエンで希釈し、ろ過助剤を添加して固形分をろ別し、ろ液を濃縮し、末端にアクリロイル基を有する重合体[P1]および[P2]を得た。得られた重合体の1分子あたりに導入されたアクリロイル基数、数平均分子量、分子量分布を併せて表1に示す。
(A)成分として製造例1で得られた重合体[P1]34.0部、(C)成分として[P2]22.6部、(B)成分としてt-ブチルシクロへキシルメタクリレート(商品名TBCHMA;日本油脂製)22.6部、その他のアクリルモノマーとしイソボロニルアクリレート(商品名;IBXA、共栄社化学製)11.3部、2-ヒドロキシエチルメタクリレート(商品名HO-250;共栄社化学製)3.8部、接着性付与成分として(2-ヒドロキシエチル)メタクリレートアシッドホスフェート(商品名;JPA514、城北化学製)1.0部、(D)成分として2-ヒロドキシ-1-{4-[4-(2-ヒドロキシ-2-メチル-プロピオニル)-ベンジル]フェニル}-2-メチル-プロパン-1-オン(商品名IRGACURE127;チバ・ジャパン製)3.8部、ビス(2,4,6-トリメチルベンゾイル)-フェニルフォスフィンオキサイド(商品名;IRGACURE819、チバ・ジャパン製)0.5部、チキソ性付与成分として、微粒子シリカ(商品名;ASEROSIL#200、日本アエロジル製)0.25部、ジメチルアクリルアミド(商品名DMAA;興人製)を加え、0.25を加え、2Lのプラネタリーミキサー(井上製作所製)で2時間混練した。その後、(E)成分として平均粒径1.3~2.0μmの球状シリカ(商品名;SOC5、アドマテック製)60部、平均粒径6μmの球状シリカ(商品名;FB301、電気化学工業製)180部を加え、16時間同ミキサーで混練して、接着剤用硬化性組成物を得た。接着剤組成物の処方を表2に示す。得られた接着剤組成物の粘度23℃を測定した後、円筒型の型枠に流し込んで、積算光量6000mJ/cm2でUV硬化させた。この硬化物を用いてDuroD硬度および硬化収縮を測定した。さらに、ポリカーボネートと各基材のせん断サンプルを照射条件6000mJ/cm2でUV硬化させて作成し、強度を測定した。結果を表2および3に示す。
23℃条件で、BH型粘度、No.7ローターを用いて2rpm、20rpmの粘度を測定した。
JIS K 6254に準拠して、接着剤硬化物の硬度を測定した。
硬化収縮は、以下の式で算出した。
(硬化物比重-硬化前の接着剤の液比重)/硬化物比重*100
JIS K 6850に準拠して測定した。
実施例1と同様の方法で、表2および3に示す処方の接着剤組成物を作成し、上記の物性を測定した。結果を表4および5に示す。
Claims (14)
- (A)一般式(1):
-OC(O)C(Ra)=CH2 (1)
(式中、Raは水素原子又は炭素数1~20の有機基を表わす)
で表わされる基を1個より多く有する反応性オリゴマー、および
(B)脂肪族分岐構造および脂環式脂肪族構造を分子内にそれぞれ少なくとも1つ有し、かつ
一般式(2):
-OC(O)C(Rb)=CH2 (2)
(式中、Rbは水素原子又は炭素数1~20の有機基を表わす)
で表される基を分子末端に1個以上有する化合物
を必須成分として含有してなることを特徴とする難接着基材用接着剤組成物。 - (B)成分の脂肪族分岐構造がt-ブチル基であることを特徴とする請求項1に記載の難接着基材用接着剤組成物。
- (A)成分の反応性オリゴマーが、一般式(1)で表わされる基を1分子あたり2個以上有し、かつ、該置換基を分子末端に1個以上有するビニル系重合体であることを特徴とする請求項1または2に記載の難接着基材用接着剤組成物。
- さらに、(C)一般式(3):
-OC(O)C(Rc)=CH2 (3)
(式中、Rcは水素原子又は炭素数1~20の有機基を表わす)
で表わされる基を平均して1分子あたり分子末端に1個以下有するビニル系重合体を含有することを特徴とする請求項1~3のいずれかに記載の難接着基材用接着剤組成物。 - さらに、(D)重合開始剤を含有することを特徴とする、請求項1~4のいずれかに記載の難接着基材用接着剤組成物。
- (D)成分が光ラジカル重合開始剤であることを特徴とする、請求項5記載の難接着基材用接着剤組成物。
- (A)成分および/または(C)成分の分子量分布が1.8未満である、請求項1~6のいずれかに記載の難接着基材用接着剤組成物。
- (A)成分および/または(C)成分が(メタ)アクリル系重合体である請求項1~7のいずれかに記載の難接着基材用接着剤組成物。
- さらに、(E)充填材を含有することを特徴とする、請求項1~8のいずれかに記載の難接着基材用接着剤組成物。
- 請求項1~9のいずれかに記載の難接着基材用接着剤組成物を主成分として用いた接着剤。
- ポリフェニレンスルフィド、ポリシクロオレフィン、液晶ポリマーまたはマグネシウム合金を被着体として用いることを特徴とする、請求項10に記載の接着剤。
- 光学部材の接着に用いることを特徴とする、請求項10または11に記載の接着剤。
- 光ディスク装置の製造に用いられることを特徴とする、請求項10~12のいずれかに記載の接着剤。
- 請求項10~13のいずれかに記載の接着剤を用いて製造される光ディスク装置。
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WO2012073688A1 (ja) * | 2010-11-30 | 2012-06-07 | 株式会社スリーボンド | 光硬化性組成物 |
JP2012116931A (ja) * | 2010-11-30 | 2012-06-21 | Three Bond Co Ltd | 光硬化性組成物 |
CN103228689A (zh) * | 2010-11-30 | 2013-07-31 | 三键有限公司 | 光固化性组合物 |
US9469709B2 (en) | 2010-11-30 | 2016-10-18 | Three Bond Fine Chemical Co., Ltd. | Photocurable composition |
WO2012096330A1 (ja) * | 2011-01-12 | 2012-07-19 | 協立化学産業株式会社 | 多官能アクリレート化合物を含む活性エネルギー線硬化性樹脂組成物 |
JP2012144641A (ja) * | 2011-01-12 | 2012-08-02 | Kyoritsu Kagaku Sangyo Kk | 多官能アクリレート化合物を含む活性エネルギー線硬化性樹脂組成物 |
CN103314023A (zh) * | 2011-01-12 | 2013-09-18 | 协立化学产业株式会社 | 含有多官能丙烯酸酯化合物的活性能量射线固化性树脂组合物 |
JP2012233168A (ja) * | 2011-04-22 | 2012-11-29 | Nippon Synthetic Chem Ind Co Ltd:The | アクリル系樹脂組成物、およびそれを用いた用途 |
JP2016191070A (ja) * | 2011-04-22 | 2016-11-10 | 日本合成化学工業株式会社 | アクリル系樹脂組成物、およびそれを用いた用途 |
JP2016040373A (ja) * | 2011-09-19 | 2016-03-24 | ヘンケル アイピー アンド ホールディング ゲゼルシャフト ミット ベシュレンクテル ハフツング | 高官能化樹脂ブレンド |
US20140371398A1 (en) * | 2011-12-05 | 2014-12-18 | Three Bond Fine Chemical Co., Ltd. | Two-pack type curable resin composition |
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JP2013142102A (ja) * | 2012-01-10 | 2013-07-22 | Kaneka Corp | 光学材料用活性エネルギー線硬化性組成物、硬化物、および製造方法 |
JP2013209487A (ja) * | 2012-03-30 | 2013-10-10 | Emulsion Technology Co Ltd | 光硬化型粘着剤組成物およびこれを用いた粘着シート |
JP2015071719A (ja) * | 2013-10-04 | 2015-04-16 | 株式会社カネカ | ラジカル硬化性組成物およびその硬化物 |
JP2015108044A (ja) * | 2013-12-03 | 2015-06-11 | 電気化学工業株式会社 | 仮固定用接着剤組成物、それを用いた構造体及び部材の仮固定方法 |
US20180230256A1 (en) * | 2014-09-29 | 2018-08-16 | Three Bond Co., Ltd. | Curable resin composition |
US10774166B2 (en) * | 2014-09-29 | 2020-09-15 | Three Bond Co., Ltd. | Curable resin composition |
JP7430889B2 (ja) | 2017-12-28 | 2024-02-14 | Kjケミカルズ株式会社 | t-ブチルシクロヘキシル(メタ)アクリレートを含有する接着剤組成物 |
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JPWO2009148182A1 (ja) | 2011-11-04 |
CN102057001A (zh) | 2011-05-11 |
JP5676256B2 (ja) | 2015-02-25 |
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