WO2012029249A1 - 電気、電子部品材料用組成物およびその硬化物 - Google Patents
電気、電子部品材料用組成物およびその硬化物 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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- C08F120/00—Homopolymers 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 a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F120/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F120/10—Esters
- C08F120/12—Esters of monohydric alcohols or phenols
- C08F120/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F120/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1808—C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/04—Polymers provided for in subclasses C08C or C08F
- C08F290/046—Polymers of unsaturated carboxylic acids or derivatives thereof
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F293/00—Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule
- C08F293/005—Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule using free radical "living" or "controlled" polymerisation, e.g. using a complexing agent
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/14—Esterification
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/26—Removing halogen atoms or halogen-containing groups from the molecule
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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
- C08L33/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2438/00—Living radical polymerisation
- C08F2438/01—Atom Transfer Radical Polymerization [ATRP] or reverse ATRP
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2800/00—Copolymer characterised by the proportions of the comonomers expressed
- C08F2800/20—Copolymer characterised by the proportions of the comonomers expressed as weight or mass percentages
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2810/00—Chemical modification of a polymer
- C08F2810/30—Chemical modification of a polymer leading to the formation or introduction of aliphatic or alicyclic unsaturated groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2810/00—Chemical modification of a polymer
- C08F2810/40—Chemical modification of a polymer taking place solely at one end or both ends of the polymer backbone, i.e. not in the side or lateral chains
Definitions
- the present invention relates to a composition for electrical and electronic component materials and electrical and electronic component materials. More specifically, it contains a vinyl polymer having a (meth) acryloyl group, a vinyl monomer having a (meth) acryloyl group, and an initiator, and the composition has a low viscosity and a fast curing property.
- the present invention relates to a composition for electrical and electronic component materials that is excellent in electrical insulation and electrode discoloration resistance under high temperature and high humidity conditions, and an electrical and electronic component material obtained by curing the composition.
- curable resins are used in a wide range of applications.
- Curable resins such as epoxy resins, imide resins, amideimide resins, unsaturated polyester resins, and phenol resins are used for applications such as adhesives for electronic components and compounds for radiating electronic components.
- the cured products of these resins are hard and have problems such as adverse effects such as cutting of bonding wires due to differences in linear expansion coefficient.
- a silicon-containing group having a hydroxyl group or a hydrolyzable group bonded to a silicon atom and capable of cross-linking by forming a siloxane bond (hereinafter referred to as a silicon-containing group)
- silicone polymers, polyether polymers, hydrocarbon polymers, vinyl polymers, and the like are known.
- heating is not necessarily required for curing, but there are common features such as a slow curing rate and insufficient deep curability. There is a problem.
- Silicone-based, polyether-based and hydrocarbon-based ones have been proposed as those free from these problems.
- Silicone systems have problems with electrical properties such as low molecular weight silicone compounds present in cured products causing electrical contact failures (see Patent Document 1), and polyether systems and unsaturated hydrocarbon systems have poor heat resistance
- the resin itself has a high viscosity, which causes a problem in handling.
- the present inventors have reported a polymer having a main chain as a vinyl polymer obtained by living radical polymerization and having a (meth) acryloyl group at its terminal (Patent Documents 2 to 4).
- the combined cured product is excellent in heat resistance, oil resistance and the like, but has problems in electrical insulation and electrode discoloration, and may not be used for electrical member sealing and adhesive applications.
- An object of the present invention is to provide a low-viscosity, fast-curing electrical and electronic component material composition, and a cured product excellent in electrical insulation and electrode discoloration resistance in addition to heat resistance.
- the present inventors considered using a hydrophobic compound containing a long-chain aliphatic hydrocarbon group, a cyclic aliphatic hydrocarbon group, or the like in order to improve electrical insulation and resistance to electrode discoloration. It was. It is known that when moisture in the air comes into contact with an electrode metal (copper, silver, tin, lead, nickel, gold, solder, etc.), ion migration occurs and the electrode metal changes color and short-circuits. That is, it was considered to make the cured product low hygroscopic by using a hydrophobic compound.
- a method of using a hydrophobic compound first, a method in which a vinyl monomer having a hydrophobic hydrocarbon group is copolymerized with the vinyl polymer itself can be considered. It is difficult to devolatilize a vinyl monomer having a hydrocarbon group, or the resulting vinyl monomer has a high viscosity. There are concerns that there is no such problem. On the other hand, the method of mixing a vinyl monomer having a hydrophobic hydrocarbon group with the curable composition is easy to handle because the curable composition tends to have a low viscosity, and the substituent structure of the vinyl monomer.
- the present invention relates to the following composition for electric and electronic component materials and a cured product thereof.
- (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) a vinyl polymer having at least one (meth) acryloyl group per molecule per molecule, (B) General formula (2): R b- (OC (O) C (R a ) CH 2 ) n (2) (In the formula, R a is a hydrogen atom or an organic group having 1 to 20 carbon atoms, R b is an organic group having 6 to 20 carbon atoms, and n is an integer of 2 to 6).
- a composition for electrical and electronic component materials containing It is related with the composition for electronic component materials characterized by containing (B) component 25weight% or more and 45weight% or less with respect to a total of 100 weight% of (A) component and (B) component.
- (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) a vinyl polymer having at least one (meth) acryloyl group per molecule per molecule, (B) General formula (2): R b- (OC (O) C (R a ) CH 2 ) n (2) (In the formula, R a is a hydrogen atom or an organic group having 1 to 20 carbon atoms, R b is an organic group having 6 to 20 carbon atoms, and n is an integer of 2 to 6).
- a composition for electrical and electronic component materials containing The total of component (B) and component (D) is 25% by weight or more and 65% by weight or less with respect to 100% by weight of component (A), component (B) and component (D), and component (B) Relates to a composition for electrical and electronic component materials containing 5% by weight or more.
- the total of component (B) and component (D) is 30% by weight or more and 55% by weight or less with respect to 100% by weight of component (A), component (B) and component (D), and component (B) Is preferably contained in an amount of 15% by weight or more.
- the amount of the component (C) is preferably 0.001 to 10 parts by weight with respect to 100 parts by weight as a total of the components (A), (B), and (D).
- the main chain of the component (A) is produced by polymerizing an acrylate monomer.
- the main chain of the component (A) is preferably produced by a living radical polymerization method, more preferably produced by an atom transfer radical polymerization method.
- the main chain of the component (A) is produced by polymerization of a vinyl monomer using a chain transfer agent.
- the number average molecular weight of a component is 3000 or more.
- the component (A) vinyl polymer preferably has a ratio of the weight average molecular weight to the number average molecular weight measured by gel permeation chromatography of less than 1.8.
- the component (B) is preferably a vinyl monomer having two (meth) acryloyl groups in one molecule.
- the component is preferably a photoradical initiator.
- the present invention relates to an electrical / electronic component material composition in which the electrical / electronic component material composition is in contact with an electrode metal.
- the present invention relates to electrical and electronic component materials obtained by curing the composition for electrical and electronic component materials described above.
- the present invention relates to a cured product obtained by curing the composition for electrical and electronic component materials described above with active energy rays or heat.
- component (A) When the component (A) is produced, unreacted or side reactions may occur, so the average value of the (meth) acryloyl group introduced into the vinyl polymer may be out of the setting.
- this mixture when the average value of the (meth) acryloyl group introduced at the terminal of the vinyl polymer is 0.8 or more, this mixture is referred to as component (A).
- the average value of the (meth) acryloyl group introduced into the vinyl polymer is preferably 0.8 or more and 2.3 or less, more preferably 1.5 or more and 2.5 or less, and still more preferably 1.8 or more and 2.2 or less.
- the number is less than 0.8, the unreacted components of the cured product increase, and the heat resistance and mechanical properties may decrease.
- the number is more than 3.0, the number of cross-linking points of the cured product is increased, so that the elongation of the cured product is lowered and cracks are likely to occur.
- one or more (meth) acryloyl groups introduced into the vinyl polymer are present at the molecular terminals, but the positions of other (meth) acryloyl groups are not particularly limited. From the viewpoint that the distance between cross-linking points can be increased and the stretched physical properties of the cured product are improved, a form near the other molecular end is preferred, and a form located at the other molecular end is particularly preferred. That is, the number of (meth) acryloyl groups introduced into the vinyl polymer is at least one at the molecular end per molecule, and preferably two at both molecular ends.
- R a 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.
- the organic group is a group shown below.
- hydrocarbon group having 1 to 20 carbon atoms examples 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. And the like.
- Examples of the alkyl group having 1 to 20 carbon atoms include methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, octyl group and decyl group.
- Examples of the aryl group having 6 to 20 carbon atoms include a phenyl group and a naphthyl group.
- Examples of the aralkyl group having 7 to 20 carbon atoms 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 can be mentioned, and preferably —H, —CH 3 .
- (A) There is no limitation in particular as a vinyl-type monomer which comprises the principal chain of a component, A various thing 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, isooctyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, nonyl (meth) acrylate,
- aromatic vinyl monomers and (meth) acrylic monomers are preferred from the viewpoint of physical properties of the product. More preferred are acrylic acid ester monomers and methacrylic acid ester monomers, and further preferred are butyl acrylate, ethyl acrylate, and 2-methoxyethyl acrylate.
- the vinyl monomer constituting the main chain is particularly preferably butyl acrylate.
- the vinyl monomer constituting the main chain is particularly preferably butyl acrylate or 2-methoxyethyl acrylate.
- these preferable monomers may be copolymerized with the other monomers, and in this case, it is preferable that 40% by weight or more of these preferable monomers are contained.
- (meth) acrylic acid represents acrylic acid and / or methacrylic acid.
- the molecular weight distribution of the component (A) is not particularly limited, but is preferably less than 1.8. More preferably, it is 1.5 or less, More preferably, it is 1.3 or less.
- GPC gel permeation chromatography
- chloroform or tetrahydrofuran is used as a mobile phase
- a polystyrene gel column is used, and the molecular weight value is obtained in terms of polystyrene.
- the number average molecular weight of the vinyl polymer (A) in the present invention is not particularly limited, but is preferably 3,000 to 100,000, more preferably 5,000 to 80,000, as measured by GPC, 50,000 to 50,000 are more preferable. If the molecular weight is too low, the original characteristics of the vinyl polymer (A) tend to be difficult to be expressed. On the other hand, if the molecular weight is too high, handling tends to be difficult.
- the vinyl polymer (A) used in the present invention can be obtained by various polymerization methods, and is not particularly limited, but is preferably a radical polymerization method from the viewpoints of versatility and ease of control of the monomer, and radical polymerization. Among these, controlled radical polymerization is more preferable.
- This controlled radical polymerization method can be classified into a “chain transfer agent method” and a “living radical polymerization method”. Living radical polymerization, in which the molecular weight and molecular weight distribution of the resulting vinyl polymer (A) can be easily controlled, is more preferred, and atom transfer radical polymerization is particularly preferred because of the availability of raw materials and the ease of introduction of functional groups at the polymer terminals.
- radical polymerization controlled radical polymerization, chain transfer agent method, living radical polymerization method, and atom transfer radical polymerization are known polymerization methods.
- JP-A-2005-232419 Reference can be made to the description of the 2006-291073 publication.
- the atom transfer radical polymerization which is one of the preferred methods for synthesizing the vinyl polymer (A) in the present invention, will be briefly 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 sulfonyl halide.
- a compound or the like is preferably used as an initiator. Specific examples include compounds described in paragraphs [0040] to [0064] of JP-A-2005-232419.
- an organic halide having two or more starting points or a sulfonyl halide compound is preferably used as an initiator.
- an organic halide having two or more starting points or a sulfonyl halide compound is preferably used as an initiator.
- transition metal complex used as a polymerization catalyst is a metal complex which uses a periodic table group 7, 8, 9, 10, or 11 element as a central metal, More preferably, it is 0.
- the monovalent copper compound used to form the copper complex include cuprous chloride, cuprous bromide, cuprous iodide, cuprous cyanide, and oxidized oxide. Cuprous, cuprous perchlorate, and the like.
- the polymerization reaction can be carried out without solvent, but can also be carried out in various solvents.
- the type of the solvent is not particularly limited, and examples thereof include a solvent described in paragraph [0067] of JP-A-2005-232419. These may be used alone or in combination of two or more.
- Polymerization can also be performed in an emulsion system or a system using supercritical fluid CO 2 as a medium.
- the polymerization temperature is not limited, but can be carried out in the range of 0 to 200 ° C, and preferably in the range of room temperature to 150 ° C.
- a known method can be used for introducing the polymerizable carbon-carbon double bond. Examples thereof include the methods described in paragraphs [0080] to [0091] of JP-A No. 2004-203932. Among these methods, from the viewpoint of easier control, it is preferable that the method is produced by replacing the terminal halogen group of the vinyl polymer with a compound having a polymerizable carbon-carbon double bond. .
- the (meth) acrylic polymer having a terminal halogen group is a method of polymerizing a vinyl monomer using the above-described organic halide or sulfonyl halide compound as an initiator and a transition metal complex as a catalyst, or a halogen compound. Although it is produced by a method of polymerizing a vinyl monomer as a chain transfer agent, the former is preferred.
- the compound having a polymerizable carbon-carbon double bond is not particularly limited, but a compound represented by the following general formula (4) can be used.
- M + -OC (O) C (R) CH 2 (4)
- R in the above formula (4) 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 can be mentioned, and —H and —CH 3 are preferred.
- M + in the above formula (4) is a counter cation of an oxyanion
- examples of M + include alkali metal ions, specifically lithium ions, sodium ions, potassium ions, and quaternary ammonium ions.
- examples of the quaternary ammonium ion include tetramethylammonium ion, tetraethylammonium ion, tetrabenzylammonium ion, trimethyldodecylammonium ion, tetrabutylammonium ion, dimethylpiperidinium ion, and the like, preferably sodium ion and potassium ion.
- the amount of the oxyanion of the general formula (4) used is preferably 1 to 5 equivalents, more preferably 1.0 to 1.2 equivalents relative to the halogen group.
- the solvent for carrying out this reaction is not particularly limited but is preferably a polar solvent because it is a nucleophilic substitution reaction.
- a polar solvent because it is a nucleophilic substitution reaction.
- tetrahydrofuran, dioxane, diethyl ether, acetone, dimethyl sulfoxide, dimethylformamide, dimethylacetamide, hexamethylphosphoric Triamide, acetonitrile, etc. are used.
- the temperature at which the reaction is carried out is not limited, but is generally from 0 to 150 ° C., preferably from room temperature to 100 ° C. in order to retain the polymerizable terminal group.
- N in the general formula (2) is preferably 3 or less, more preferably 2 in terms of excellent mechanical properties (elongation, strength) of the cured product.
- R a may be used as well R a in formula (1) described above.
- R b is preferably an organic group having 6 to 20 carbon atoms, more preferably an organic group having 8 to 18 carbon atoms, and still more preferably an organic group having 12 to 15 carbon atoms.
- (B) component becomes volatile and there exists a tendency for the weight change at the time of high temperature to become large.
- the component (B) tends to have high viscosity and the effect of reducing the viscosity of the composition tends to be low.
- R b is preferably a chain aliphatic structure, preferably having 8 or more carbon atoms, more preferably 12 or more carbon atoms, from the viewpoint of good mechanical properties (elongation, strength) of the cured product and excellent water absorption resistance and moisture absorption resistance. preferable.
- component (B) having a chain aliphatic structure examples include triethylene glycol di (meth) acrylate, dipropylene glycol di (meth) acrylate, and 3-methyl-1,5-pentanediol di (meth) acrylate.
- a vinyl monomer having no ether structure is preferable from the viewpoint of good heat resistance and insulation.
- Examples of vinyl monomers having no ether structure include 3-methyl-1,5-pentanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, and 1,7-heptanediol di (Meth) acrylate, 1,8-octanediol di (meth) acrylate, 2-methyl-1,8-octanediol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate, 1,10-decane Examples thereof include diol di (meth) acrylate.
- R b is preferably a cyclic structure, more preferably an alicyclic aliphatic structure, and even more preferably a polycyclic aliphatic structure in that the cured product has excellent water absorption resistance and moisture absorption resistance.
- component (B) having an alicyclic aliphatic structure examples include cyclohexanedimethanol di (meth) acrylate, dimethylol-tricyclodecanedi (meth) acrylate, 1,3-adamantanedimethanol di (meth) ) Acrylate and the like.
- the component (B) having a particularly good balance of water absorption resistance, moisture absorption resistance, low volatility, and low viscosity effect includes 1,9-nonanediol diacrylate, 1,10-decandiol diacrylate, dimethylol-tricyclode Candiacrylate.
- the vinyl monomer having 3 to 6 (meth) acryloyl groups is not particularly limited, but is trimethylolpropane tri (meth) acrylate and pentaerythritol in terms of low viscosity, high reactivity and good availability. Tetra (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, and dipentaerythritol hexa (meth) acrylate are preferred.
- Two or more types of components may be used in combination.
- the addition amount of the component (B) is 25% by weight or more and 45% by weight or less with respect to the total of 100% by weight of the component (A) and the component (B), but 30% by weight or more and 40% by weight or less. More preferred. When the addition amount of the component (B) is less than 25% by weight, the effects of resistance to electrode discoloration and viscosity reduction are reduced. On the other hand, when the addition amount of the component (B) is more than 45% by weight, the mechanical properties (elongation and strength) of the cured product are lowered.
- the component (D) of the present invention is General formula (3): R c —OC (O) C (R a ) ⁇ CH 2 (3) (Wherein, R a is a hydrogen atom or an organic group having 1 to 20 carbon atoms, and R c is an organic group having 6 to 20 carbon atoms) and is a vinyl monomer having a (meth) acryloyl group.
- the total of (B) component and (D) component is 25 wt% or more and 65 wt% or less with respect to the total of 100 wt% of (A) component, (B) component and (D) component, and (B ) Component is contained in the range of 5% by weight or more.
- R a may be used as well R a in formula (1) described above.
- R c is preferably an organic group having 6 to 20 carbon atoms, more preferably an organic group having 8 to 18 carbon atoms, and still more preferably an organic group having 12 to 15 carbon atoms.
- (D) component becomes volatile and there exists a tendency for the weight change at the time of high temperature to become large.
- the (D) component tends to have a high viscosity, and the effect of reducing the viscosity of the composition tends to be low.
- R c is preferably a chain aliphatic structure, preferably having 8 or more carbon atoms, more preferably 12 or more carbon atoms in terms of good mechanical properties (elongation, strength) of the cured product and excellent water absorption resistance and moisture absorption resistance. preferable.
- Specific examples of the component (D) having a chain aliphatic structure include n-hexyl (meth) acrylate, n-heptyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, 2-ethylhexyl.
- a vinyl monomer having no ether structure is preferable from the viewpoint of good heat resistance and insulation.
- vinyl monomers having no ether structure include n-hexyl (meth) acrylate, n-heptyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, and 2-ethylhexyl (meth).
- n-nonyl (meth) acrylate isononyl (meth) acrylate
- n-decyl (meth) acrylate isodecyl (meth) acrylate
- n-dodecyl (meth) acrylate tridecyl (meth) acrylate
- stearyl (meth) acrylate examples include isostearyl (meth) acrylate.
- R c is preferably a cyclic structure, more preferably an alicyclic aliphatic structure, and even more preferably a polycyclic aliphatic structure in that the cured product has excellent water absorption resistance and moisture absorption resistance.
- component (D) having an alicyclic aliphatic structure examples include cyclohexyl (meth) acrylate, isobornyl (meth) acrylate, 3,3,5-trimethylcyclohexane (meth) acrylate, and dicyclopentenyl (meth) acrylate.
- component (D) having a polycyclic aliphatic structure examples include dicyclopentenyl (meth) acrylate, dicyclopentenyloxyethyl (meth) acrylate, dicyclopentanyl (meth) acrylate, and dicyclopentanyloxy. Examples thereof include ethyl (meth) acrylate, 1-adamantyl (meth) acrylate, tricyclopentanyl (meth) acrylate, and tricyclopentenyl (meth) acrylate.
- component (D) having a cyclic structure other than the alicyclic aliphatic structure examples include phenyl (meth) acrylate, phenoxyethyl (meth) acrylate, toluyl (meth) acrylate, benzyl (meth) acrylate, and nonylphenoxypolyethylene.
- examples include glycol (meth) acrylate and O-phenylphenol (meth) acrylate.
- component (D) having a good balance of water absorption resistance, moisture absorption resistance, low volatility and low viscosity effect, isononyl acrylate, isodecyl acrylate, n-dodecyl acrylate, isostearyl acrylate, isobornyl acrylate, dicyclo
- pentanyl acrylate is pentanyl acrylate.
- a component may use 2 or more types together.
- the component (D) can be used in combination with the component (B) in that the mechanical properties (elongation, strength) of the cured product are improved and the effects of electrical insulation, electrode discoloration resistance, and low viscosity can be obtained. preferable.
- the component (B) and the component (D) As the addition amount when the component (B) and the component (D) are used in combination, the component (B) and the component (D) with respect to a total of 100% by weight of the component (A), the component (B) and the component (D).
- the total of the components is 25% by weight or more and 65% by weight or less, and the component (B) is 5% by weight or more, but the sum of the components (B) and (D) is 30% by weight or more and 55% by weight or less,
- (B) component is 5 weight% or more
- the sum total of (B) component and (D) component is 35 weight% or more and 45 weight% or less
- (B) component is 5 weight% or more. Is more preferable.
- the addition amount of the component (B) and the component (D) is less than 25% by weight, the effect of electrode discoloration resistance and viscosity reduction is reduced.
- the addition amount of the component (B) and the component (D) is more than 65% by weight, the mechanical properties (elongation, strength) of the cured product are reduced, the tack is increased, and the heat resistance is decreased.
- the amount of the component (B) when the component (B) and the component (D) are used in combination is 5% by weight or more, preferably 10% by weight or more, and more preferably 15% by weight or more.
- the amount of component (B) added is less than 5% by weight, the effect of resistance to electrode discoloration is reduced.
- the amount of the component (B) is preferably 45% by weight or less, more preferably 40% by weight or less, and even more preferably 35% by weight or less. preferable.
- the addition amount of the component (B) is more than 45% by weight, the mechanical properties (elongation and strength) of the cured product are lowered.
- ⁇ (C) component Examples of the component (C) of the present invention include a photopolymerization initiator, a thermal polymerization initiator, a redox initiator, and the like.
- the photopolymerization initiator, thermal polymerization initiator, and redox initiator may be used alone or as a mixture of two or more, but when used as a mixture, the amount of each initiator used Is preferably within the respective ranges described below.
- a photo radical initiator and a photo anion initiator are preferable, and a photo radical initiator is particularly preferable.
- photo-radical initiators having good ultraviolet curability include ⁇ -hydroxy ketone compounds (for example, benzoin, benzoin methyl ether, benzoin butyl ether, 1-hydroxy-cyclohexyl-phenyl-ketone, etc.), phenyl ketone derivatives (for example, , Acetophenone, propiophenone, benzophenone, 3-methylacetophenone, 4-methylacetophenone, 3-pentylacetophenone, 2,2-diethoxyacetophenone, 4-methoxyacetophenone, 3-bromoacetophenone, 4-allylacetophenone, 3-methoxy Benzophenone, 4-methylbenzophenone, 4-chlorobenzophenone, 4,4'-dimethoxybenzophenone, 4-chloro-4'-benzylbenzophenone, bis (4-dimethylaminophen Nenyl) ketone etc.) are preferred.
- ⁇ -hydroxy ketone compounds for example, benzoin, benzoin methyl
- Examples of the photo radical initiator capable of suppressing oxygen inhibition on the surface of the cured product include, for example, 2-hydroxy-1- [4- [4- (2-hydroxy-) having two or more photodegradable groups in the molecule.
- 2-Methyl-propionyl) -benzyl] phenyl] -2-methyl-propan-1-one (trade name IRGACURE127, manufactured by Ciba Japan), 1- [4- (4-Benzoxylphenylsulfanyl) phenyl]- 2-Methyl-2- (4-methylphenylsulfonyl) propan-1-one (trade name ESURE1001M), methylbenzoylformate (trade name SPEDCURE MBF manufactured by LAMBSON) O-ethoxyimino-1-phenylpropan-1-one (Product name: SPEEDCURE PDO, manufactured by LAMBSON), oligo [2-hydroxy-2-methyl [4- (1-Methylvinyl) phenyl] propanone (
- 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, bis (2,6-dimethyl), which are characterized by improved deep curability
- acylphosphine oxide photo radical initiators such as benzoyl) -2,4,4-trimethyl-pentylphosphine oxide and 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide.
- 1-hydroxy-cyclohexyl-phenyl-ketone and 2-hydroxy-2-methyl-1-phenyl-propane-1 are preferable in view of the balance between the active energy ray curability and the storage stability of the curable composition of the present invention.
- a near infrared light absorbing cationic dye or the like may be used as the near infrared photopolymerization initiator.
- Near-infrared light absorbing cationic dyes are excited by light energy in the region of 650 to 1500 nm, for example, near-infrared light 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.
- photopolymerization initiators may be used alone or in combination of two or more, or may be used in combination with other compounds.
- a combination with other compounds for improving curability specifically, a combination with an amine such as diethanolmethylamine, dimethylethanolamine, triethanolamine, and further an iodonium salt such as diphenyliodonium chloride.
- an amine such as diethanolmethylamine, dimethylethanolamine, triethanolamine, and further an iodonium salt such as diphenyliodonium chloride.
- examples thereof include combinations thereof, pigments such as methylene blue, and those combined with amines.
- polymerization inhibitors such as hydroquinone, hydroquinone monomethyl ether, benzoquinone, and para tertiary butyl catechol, can also be added as needed.
- the azo initiator is not limited, but 2,2'-azobis (4-methoxy-2,4-dimethylvaleronitrile) (VAZO33), 2,2'-azobis (2-amidinopropane) Dihydrochloride (VAZO50), 2,2'-azobis (2,4-dimethylvaleronitrile) (VAZO52), 2,2'-azobis (isobutyronitrile) (VAZO64), 2,2'-azobis-2 Methylbutyronitrile (VAZO67), 1,1-azobis (1-cyclohexanecarbonitrile) (VAZO88) (all available from DuPont Chemical), 2,2'-azobis (2-cyclopropylpropionitrile), and 2,2'-azobis (methylisobutyrate) (V-601) (VAZO33), 2,2'-azobis (2-amidinopropane) Dihydrochloride (VAZO50), 2,2'-azobis (2,4-dimethylvaleronitrile)
- Peroxide initiators include, but are not limited to, benzoyl peroxide, acetyl peroxide, lauroyl peroxide, decanoyl peroxide, dicetyl peroxydicarbonate, di (4-t-butylcyclohexyl) peroxy Dicarbonate (Perkadox 16S) (available from Akzo Nobel), di (2-ethylhexyl) peroxydicarbonate, t-butyl peroxypivalate (Lupersol 11) (available from Elf Atochem), t-butyl peroxy-2- Examples include ethyl hexanoate (Trigonox 21-C50) (available from Akzo Nobel) and dicumyl peroxide.
- persulfate initiator examples include, but are not limited to, potassium persulfate, sodium persulfate, and ammonium persulfate.
- a preferable thermal polymerization initiator is selected from the group consisting of an azo initiator and a peroxide initiator. More preferred are 2,2'-azobis (methylisobutylate), t-butyl peroxypivalate, di (4-t-butylcyclohexyl) peroxydicarbonate, and mixtures thereof.
- a thermal polymerization initiator may be used independently or may use 2 or more types together.
- the thermal polymerization initiator is present in a catalytically effective amount, and the amount added is not particularly limited, but the components (A) and (B) of the present invention are not particularly limited.
- the amount is preferably 0.01 to 5 parts by weight, more preferably 0.025 to 2 parts by weight with respect to 100 parts by weight as the total.
- Redox (redox) initiators can be used in a wide temperature range.
- the following initiator species can be advantageously used at room temperature.
- Suitable redox initiators include, but are not limited to, combinations of the above persulfate initiators and reducing agents (sodium metabisulfite, sodium bisulfite, etc.); organic peroxides and tertiary amines. Combinations such as a combination of benzoyl peroxide and dimethylaniline, a combination of cumene hydroperoxide and anilines; a combination of organic peroxide and transition metal, such as a combination of cumene hydroperoxide and cobalt naphthate, and the like.
- Preferred redox initiators are a combination of organic peroxide and tertiary amine, a combination of organic peroxide and transition metal, and more preferably a combination of cumene hydroperoxide and anilines, cumene hydroperoxide. And cobalt naphthate.
- a redox initiator may be used independently or may use 2 or more types together.
- the redox initiator is present in a catalytically effective amount, and the amount added is not particularly limited, but the components (A) and (B) of the present invention are not particularly limited.
- the amount is preferably 0.01 to 5 parts by weight, more preferably 0.025 to 2 parts by weight with respect to 100 parts by weight as the total.
- the curable composition of the present invention contains a vinyl polymer as the component (A), a vinyl monomer as the component (B), an initiator as the component (C), and if necessary, a vinyl monomer as the component (D).
- various additives such as polymerizable monomers and / or oligomers, curing modifiers, metal soaps, fillers, fine hollow particles, plasticizers, Adhesion imparting agent, solvent, flame retardant, antioxidant, light stabilizer, ultraviolet absorber, physical property modifier, radical inhibitor, metal deactivator, ozone degradation inhibitor, phosphorus peroxide decomposer, lubricant
- a pigment, a foaming agent, a photocurable resin, and the like may be appropriately blended as necessary.
- radical polymerizable group examples include (meth) acryloyl group such as (meth) acryl group, styrene group, acrylonitrile group, vinyl ester group, N-vinylpyrrolidone group, acrylamide group, conjugated diene group, vinyl ketone group, chloride A vinyl group etc. are mentioned. Among these, those having a (meth) acryloyl group similar to the vinyl polymer used in the present invention are preferable.
- the monomer examples include (meth) acrylate monomers, cyclic acrylates, styrene monomers, acrylonitrile, vinyl ester monomers, N-vinyl pyrrolidone, acrylamide monomers, conjugated diene monomers, vinyl ketone monomers, vinyl halides. -A vinylidene halide monomer, a polyfunctional monomer, etc. are mentioned.
- (Meth) acrylate monomers include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, (meth ) Isobutyl acrylate, tert-butyl (meth) acrylate, n-pentyl (meth) acrylate, 2-methoxyethyl (meth) acrylate, 3-methoxybutyl (meth) acrylate, 2- (meth) acrylic acid 2- Hydroxyethyl, 2-hydroxypropyl (meth) acrylate, glycidyl (meth) acrylate, 2-aminoethyl (meth) acrylate, N- (meth) acryloylmorpholine, tetrahydrofuranyl (meth) acrylate, ⁇ - (methacryloyloxy) Propy
- styrene monomer examples include styrene and ⁇ -methylstyrene.
- vinyl ester monomers examples include vinyl acetate, vinyl propionate, and vinyl butyrate.
- Acrylamide monomers include acrylamide, N, N-dimethylacrylamide and the like.
- conjugated diene monomer examples include butadiene and isoprene.
- vinyl ketone monomers examples include methyl vinyl ketone.
- vinyl halide / vinylidene halide monomer examples include vinyl chloride, vinyl bromide, vinyl iodide, vinylidene chloride, and vinylidene bromide.
- polyfunctional monomer examples include neopentyl glycol polypropoxydi (meth) acrylate, trimethylolpropane polyethoxy (meth) triacrylate, bisphenol F polyethoxydi (meth) acrylate, bisphenol A polyethoxydi (meth) acrylate, and the like.
- the oligomer examples include epoxy acrylate resins such as bisphenol A type epoxy acrylate resin, phenol novolak type epoxy acrylate resin, cresol novolak type epoxy acrylate resin, and COOH group-modified epoxy acrylate type resin; polyol (polytetramethylene glycol, ethylene glycol Adipic acid polyester diol, ⁇ -caprolactone modified polyester diol, polypropylene glycol, polyethylene glycol, polycarbonate diol, hydroxyl-terminated hydrogenated polyisoprene, hydroxyl-terminated polybutadiene, hydroxyl-terminated polyisobutylene, etc.) and organic isocyanate (tolylene diisocyanate, isophorone diisocyanate, Diphenylmethane diisocyanate, hexamethylene di Urethane resins obtained from socyanate, xylylene diisocyanate, etc.) with hydroxyl group-containing (meth) acrylate ⁇ hydroxye
- monomers and / or oligomers having a (meth) acryloyl group are preferred.
- the number average molecular weight of the monomer and / or oligomer having a (meth) acryloyl group is preferably 5000 or less.
- the molecular weight is 1000 or less because of good compatibility.
- the amount of the polymerizable monomer and / or oligomer used is a total of 100 components (A), (B) and (D) from the viewpoint of improving surface curability, imparting toughness, and workability by reducing viscosity.
- the amount is preferably 1 to 200 parts, more preferably 5 to 100 parts, relative to parts by weight (hereinafter also simply referred to as parts).
- radical reactive oligomers having a hydrophobic main chain can be added.
- di (meth) acrylate having a butadiene skeleton (trade name; BAC-45, manufactured by Osaka Organic Chemical Industry), urethane acrylate having a bis A skeleton, epoxy acrylate having a bis A skeleton, polyester acrylate having a bis A skeleton, Each hydrogenated product etc. are mentioned.
- the curable composition of the present invention can be used in combination with a curing reaction other than the curing reaction by polymerization of the vinyl groups of the components (A), (B) and (D).
- a curing reaction other than the curing reaction by polymerization of the vinyl groups of the components (A), (B) and (D).
- the curing reaction for example, when the (A) component, the (B) component, and the (D) component of the present invention are cured using a radical photopolymerization initiator as the (C) component, Any shadows that are not present are poorly cured. In such a case, the shadow can be cured by using a curing reaction in combination.
- the molecular terminal functional group of the vinyl polymer having a (meth) acryloyl group at the molecular end of the component (A) of the present invention is an epoxy group, an alkenyl group, or a hydrolyzable silyl group.
- Certain vinyl polymers can be used. The method for introducing these functional groups is shown below.
- alkenyl group As a method for introducing an alkenyl group capable of hydrosilylation reaction into the obtained vinyl polymer, a known method can be used. Examples thereof include the methods described in paragraphs [0042] to [0086] of JP-A-2004-059783. Further preferred examples are also described in the same paragraph.
- Hydrolyzable silyl group As a method for introducing the hydrolyzable silyl group into the obtained vinyl polymer, a known method can be used. Examples thereof include the methods described in paragraphs [0076] to [0138] of JP-A-2000-191912. Further preferred examples are also described in the same paragraph.
- the following can be used as a polymerization initiator or a polymerization catalyst when using a vinyl polymer whose terminal functional group is an epoxy group, an alkenyl group, or a hydrolyzable silyl group.
- a hydrosilyl group-containing compound for example, those described in JP-A-2004-059783 [0087] to [0091].
- a hydrosilylation catalyst in combination, and examples include those described in the publication [0092].
- a curing catalyst is suitable, for example, those described in paragraphs [0147] to [0150] of JP-A-2000-191912.
- antioxidants may be used in the curable composition of the present invention as necessary.
- antioxidants include amine-based antioxidants, hindered phenol-based antioxidants, phosphorus-based antioxidants, and sulfur-based antioxidants.
- a hindered phenol-based antioxidant is preferable in that there is little discoloration of the cured product.
- 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butyl-4-ethylphenol, mono (or di or tri) ( ⁇ methylbenzyl) phenol 2 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-tert-butyl-5-methyl-4hydroxyphenyl) propionate], 1,6-hexanediol-bi
- These hindered phenolic antioxidants may be used alone or in combination of two or more. Tetrakis- [methylene-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] methane in which the molecular weight of the hindered phenol antioxidant is 600 or more from the viewpoint of further improving the heat resistance Tris- [N- (3,5-di-t-butyl-4-hydroxybenzyl)] isocyanurate, 1,3,5-trimethyl-2,4,6-tris (3,5-di-t- Butyl-4-hydroxybenzyl) benzene, 3,9-bis ⁇ 2- [3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy] -1,1-dimethylethyl ⁇ -2, More preferred is 4,8,10-tetraoxaspiro [5,5] undecane.
- the molecular weight can be measured using GC-MS or LC-MS.
- the amount of hindered phenol-based antioxidant used is preferably 0.1 to 5 parts by weight with respect to 100 parts by weight as a total of the vinyl polymers (A) and (B). If it is less than 0.1 parts by weight, the effect of improving the heat resistance is small, and if it exceeds 5 parts by weight, there is no significant difference in the effect, which is economically disadvantageous.
- the curable composition of the present invention can be prepared as a one-pack type in which all ingredients are pre-blended and sealed, and the A liquid from which only the initiator, the curing catalyst, and the crosslinking agent are removed, and the initiator, the curing catalyst, and the crosslinking. It can also be prepared as a two-component type in which the B liquid in which the agent is mixed with a filler, a plasticizer, a solvent and the like is mixed immediately before molding.
- the cured product of the present invention is obtained by curing the curable composition.
- the method for curing the curable composition is not particularly limited.
- the curing temperature varies depending on the type of the thermal polymerization initiator used, the component (A), the component (B), the component (D) and other additive components. Usually, 50 ° C to 250 ° C is preferable, and 70 ° C to 200 ° C is more preferable.
- Curing can be performed by irradiating light or an electron beam with an active energy ray source.
- an active energy ray source there is no limitation in particular as an active energy ray source.
- a high pressure mercury lamp, a low pressure mercury lamp, an electron beam irradiation apparatus, a halogen lamp, a light emitting diode, a semiconductor laser, a metal halide etc. are mentioned, for example.
- the curing temperature is preferably 100 ° C. or less, more preferably 80 ° C., and even more preferably 50 ° C. or less. When it hardens
- the curing temperature is preferably ⁇ 50 ° C. to 250 ° C., more preferably 0 ° C. to 180 ° C.
- the molding method when the curable composition of the present invention is used as a molded body is not particularly limited, and various commonly used molding methods can be used. For example, cast molding, compression molding, transfer molding, injection molding, extrusion molding, rotational molding, hollow molding, thermoforming, and the like can be given. In particular, roll molding, calender molding, extrusion molding, liquid injection molding, and injection molding are preferred because they can be automated and continuous, and are excellent in productivity.
- the curable composition and the cured product of the present invention are suitable for electric / electronic component materials in contact with the electrode metal, but are not particularly limited.
- Electrical insulating materials such as insulating coating materials for electric wires and cables, sealing materials, and adhesives , Adhesives, conformal coatings, electrical and electronic potting agents, heat dissipation materials, waterproofing materials, anti-vibration / damping / isolation materials, films, marine deck caulking, casting materials, or molding materials.
- high-voltage thick film resistors such as optical fiber for optical communication, transformer high-voltage circuit, printed circuit board, high-voltage transformer with variable resistance, electrical insulation component, semi-conductive component, conductive component, solar cell or TV flyback Potting materials such as transformers, heavy electrical components, weak electrical components, solar cell backside sealing, sealing materials for circuits and boards of electrical and electronic equipment, decorations for lighting fixtures, waterproof packings, anti-vibration rubbers, insect protection Anti-vibration / sound absorption and air sealant for packing, drip-proof cover for electric water heater, heater , Electrode packing, safety valve diaphragm, hose for sake can, waterproof packing, solenoid valve
- cathode ray tube wedges for acoustic devices such as diaphragm valves and air pipes.
- necks electrical insulation parts
- adhesives for semi-conductive parts or conductive parts adhesives for semi-conductive parts or conductive parts
- wire covering repair materials insulation joints for wire joint parts, rolls for office automation equipment, ink wipers, vibration absorbers, gels Can also be used.
- 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.
- the number of (meth) acryloyl groups introduced per molecule of polymer was calculated from the number average molecular weight determined by 1 H-NMR analysis and GPC. (However, 1 H-NMR was measured at 23 ° C. using ASX-400 manufactured by Bruker and using deuterated chloroform as a solvent.)
- viscosity The viscosity of the obtained polymer and the blended part was measured at a measurement temperature of 23 ° C. using an E-type viscometer manufactured by Toki Sangyo in accordance with JIS K 7117-2 conical plate system.
- the insulation value was a super insulation meter of model SM-8213 manufactured by HIOKI, and the measured value after 100 seconds at DC 100 V was defined as the insulation value.
- the comb-shaped substrate After the energized high temperature and high humidity test, the comb-shaped substrate was visually observed.
- the comb-shaped substrate has an anode, a cathode, and an electrode to which no charge is applied. Those having no discoloration difference between these electrode metals are indicated by ⁇ , and those having a discoloration difference between the electrode metals are indicated by ⁇ .
- a comb-shaped substrate was installed in the thermo-hygrostat, and the conducting wire was extended to the outside of the thermo-hygrostat and was always energized. After a predetermined time, the comb-shaped substrate was kept at high temperature and high humidity, and the insulation value was measured at the end of the wire extended outside the thermostatic chamber.
- the energized high temperature and high humidity test conditions were DC 50 V, 85 ° C., 85% RH, and 500 hours.
- UV curing A model LH6, H valve manufactured by Fusion UV Systems Japan Co., Ltd. was used. UV curing conditions were 1500mW / cm 2, 3000mJ / cm 2.
- the filtrate was concentrated to obtain “Polymer II” having acryloyl groups at both ends.
- the number average molecular weight of “Polymer I” was 12,000, the molecular weight distribution was 1.2, and the average number of acryloyl groups introduced per polymer molecule was 1.8.
- 80 parts of the monomer mixture was sequentially added to proceed the polymerization reaction.
- triamine was appropriately added to adjust the polymerization rate, and the polymerization was allowed to proceed while adjusting the internal temperature to about 80 ° C. to about 90 ° C.
- an oxygen-nitrogen mixed gas was introduced into the gas phase part of the reaction vessel, and the mixture was heated and stirred while maintaining the internal temperature at about 80 ° C to about 90 ° C. Volatiles were removed under reduced pressure and concentrated. This was diluted with butyl acetate, filtered and added with a filter aid.
- the filtrate was concentrated to obtain “Polymer II” having acryloyl groups at both ends.
- the “polymer II” had a number average molecular weight of 13,500, a molecular weight distribution of 1.3, and an average number of acryloyl groups introduced per molecule of the polymer of 1.6.
- component (C) As the component (C), DAROCUR 1173 (manufactured by Ciba Japan) and IRGACURE 819 (manufactured by Ciba Japan) were heated and dissolved in advance.
- the blending amounts (“parts by weight”) are shown in Tables 1 to 3.
- (B) component light acrylate DCP-A is dimethylol-tricyclodecane diacrylate
- V # 260 is 1,9-nonanediol diacrylate
- component ISTA is isostearyl acrylate
- IBXA is isopropanol.
- Boryl acrylate, FA-513A is dicyclopentanyl acrylate
- antioxidant Nauvard 445 is 4,4'-bis ( ⁇ , ⁇ '-dimethylbenzyl) diphenylamine
- IRGANOX 1010 is tetrakis- [methylene-3- (3 5-di-tert-butyl-4-hydroxyphenyl) propionate] methane.
- Examples 1 to 5 containing 25% by weight or more and 45% by weight or less of the component (B) with respect to 100% by weight of the total of the component (A) and the component (B) are between the electrode metals after the high temperature and high humidity test.
- the discoloration of was not seen.
- the component (B) was less than 25% by weight, discoloration between the electrode metals after the high temperature and high humidity test was observed.
- (B) component was included more than 45 weight%, it was hard hardened
- a hard cured product has a tendency that the edge of the coating film is peeled off from the substrate.
- the insulation value of O.D. R. indicates an overrange.
- the total of component (B) and component (D) is 25% by weight or more and 65% by weight or less with respect to the total of 100% by weight of component (A), component (B) and component (D), and (B)
- the component was 5% by weight or more
- the elongation was higher than when only the component (B) was used.
- discoloration between electrode metals was observed after the high temperature and high humidity test.
- Table 3 shows the results of conducting a current test on the comb-shaped substrates of Comparative Example 1 and Example 3 of Table 1 at 85 ° C. and 10% RH or less in the same manner.
- Reference Examples 1 and 2 there is no discoloration between the electrode metals, and it is considered that the electrode is discolored when the humidity is high. It is considered that by using the component (B) and the component (D) of the present invention, the moisture absorption resistance of the coating film is improved and the electrode discoloration is improved.
- the curable composition of the present invention is capable of low viscosity and fast curing, and the cured product has good heat resistance, weather resistance, oil resistance, compression set, mechanical properties and the like derived from a vinyl polymer, and is also resistant to resistance. Since moisture absorption is improved, electrical / electronic component materials, electrical insulation materials, sealing materials, adhesives, adhesives, potting agents, heat dissipation materials, waterproofing materials, anti-vibration / vibration / isolation requirements Suitable for applications such as vibration material, film, marine deck caulking, casting material, coating material, molding material.
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Abstract
Description
-OC(O)C(Ra)=CH2 (1)
(式中、Raは水素原子又は炭素数1~20の有機基を示す)で表わされる(メタ)アクリロイル系基を、分子末端に1分子あたり少なくとも1個以上有するビニル系重合体、
(B)一般式(2):
Rb-(OC(O)C(Ra)=CH2)n (2)
(式中、Raは水素原子又は炭素数1~20の有機基、Rbは炭素数6~20の有機基、nは2~6の整数を示す)で表わされる(メタ)アクリロイル系基を有するビニル系単量体、及び、
(C)開始剤、
を含有する電気、電子部品材料用組成物であって、
(A)成分と(B)成分の合計100重量%に対して、(B)成分を25重量%以上、45重量%以下含有することを特徴とする電子部品材料用組成物に関する。
-OC(O)C(Ra)=CH2 (1)
(式中、Raは水素原子又は炭素数1~20の有機基を示す)で表わされる(メタ)アクリロイル系基を、分子末端に1分子あたり少なくとも1個以上有するビニル系重合体、
(B)一般式(2):
Rb-(OC(O)C(Ra)=CH2)n (2)
(式中、Raは水素原子又は炭素数1~20の有機基、Rbは炭素数6~20の有機基、nは2~6の整数を示す)で表わされる(メタ)アクリロイル系基を有するビニル系単量体、
(D)一般式(3):
RC-OC(O)C(Ra)=CH2 (3)
(式中、Raは水素原子又は炭素数1~20の有機基、RCは炭素数6~20の有機基を示す)で表わされる(メタ)アクリロイル系基を有するビニル系単量体、及び
(C)開始剤、
を含有する電気、電子部品材料用組成物であって、
(A)成分と(B)成分と(D)成分の合計100重量%に対して、(B)成分と(D)成分の合計が25重量%以上、65重量%以下、かつ(B)成分が5重量%以上含有する電気、電子部品材料用組成物に関する。
<<(A)成分>>
本発明の(A)成分とは、
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(メタ)アクリロイル系基を、分子末端に1分子あたり少なくとも1個以上有するビニル系重合体である。
炭素数6~20のアリール基としては、例えばフェニル基、ナフチル基等が挙げられる。
炭素数7~20のアラルキル基としては、例えばベンジル基、フェニルエチル基等が挙げられる。
本発明で使用するビニル系重合体(A)は、種々の重合法により得ることができ、特に限定されないが、モノマーの汎用性、制御の容易性等の点からラジカル重合法が好ましく、ラジカル重合の中でも制御ラジカル重合がより好ましい。この制御ラジカル重合法は「連鎖移動剤法」と「リビングラジカル重合法」とに分類することができる。得られるビニル系重合体(A)の分子量、分子量分布の制御が容易であるリビングラジカル重合がさらに好ましく、原料の入手性、重合体末端への官能基導入の容易さから原子移動ラジカル重合が特に好ましい。上記ラジカル重合、制御ラジカル重合、連鎖移動剤法、リビングラジカル重合法、原子移動ラジカル重合は公知の重合法ではあるが、これら各重合法については、たとえば、特開2005-232419公報や、特開2006-291073公報などの記載を参照できる。
重合性の炭素-炭素二重結合導入は、公知の方法を利用することができる。例えば、特開2004-203932公報段落[0080]~[0091]記載の方法が挙げられる。これらの方法の中でも制御がより容易である点から、ビニル系重合体の末端ハロゲン基を、重合性の炭素-炭素二重結合を有する化合物で置換することにより製造されたものであることが好ましい。
M+-OC(O)C(R)=CH2(4)
上記式(4)中のRの具体例としては、例えば、-H、-CH3、-CH2CH3、-(CH2)nCH3(nは2~19の整数を表す)、-C6H5、-CH2OH、-CN、等が挙げられ、好ましくは-H、-CH3である。
<<(B)成分>>
本発明の(B)成分は、
一般式(2):
Rb-(OC(O)C(Ra)=CH2)n (2)
(式中、Raは水素原子又は炭素数1~20の有機基、Rbは炭素数6~20の有機基、nは2~6の整数示す)で表わされる(メタ)アクリロイル系基を有するビニル系単量体であり、(A)成分と(B)成分の混合物中に25重量%以上、45重量%以下含まれる。一般式(2)のnは、硬化物の機械物性(伸び、強度)が優れる点で、3以下が好ましく、より好ましくは2である。
Raは、前述した一般式(1)のRaを同様に使用できる。
CH2=CHC(O)O-(CH2)n-OC(O)CH=CH2
(nは6~20の整数)
CH2=C(CH3)C(O)O-(CH2)n-OC(O)C(CH3)=CH2
(nは6~20の整数)
CH2=CHC(O)O-(CH2CH2O)n-OC(O)CH=CH2
(nは3~10の整数)
CH2=C(CH3)C(O)O-(CH2CH2O)n-OC(O)C(CH3)=CH2
(nは3~10の整数)
鎖状脂肪族構造を有する(B)成分としては、耐熱性および絶縁性が良い点で、エーテル構造を有さないビニル系単量体が好ましい。エーテル構造を有さないビニル系単量体としては、3―メチル―1,5―ペンタンジオールジ(メタ)アクリレート、1,6―ヘキサンジオールジ(メタ)アクリレート、1,7―へプタンジオールジ(メタ)アクリレート、1,8―オクタンジオールジ(メタ)アクリレート、2―メチル―1,8―オクタンジオールジ(メタ)アクリレート、1,9―ノナンジオールジ(メタ)アクリレート、1,10―デカンジオールジ(メタ)アクリレートなどが挙げられる。
(B)成分は、2種類以上を併用しても良い。
本発明の(D)成分は、
一般式(3):
Rc-OC(O)C(Ra)=CH2 (3)
(式中、Raは水素原子又は炭素数1~20の有機基、Rcは炭素数6~20の有機基を示す)で表わされる(メタ)アクリロイル系基を有するビニル系単量体であり、(A)成分と(B)成分と(D)成分の合計100重量%に対して、(B)成分と(D)成分の合計が25重量%以上、65重量%以下、かつ(B)成分が5重量%以上の範囲で含まれる。Raは、前述した一般式(1)のRaを同様に使用できる。
CH2=CHC(O)O-(CH2)n-CH3
(nは5~19の整数)
CH2=C(CH3)C(O)O-(CH2)n-CH3
(nは5~19の整数)
CH2=CHC(O)O-(CH2CH2O)n-CH3
(nは3~9の整数)
CH2=C(CH3)C(O)O-(CH2CH2O)n-CH3
(nは3~9の整数)
CH2=CHC(O)O-(CH2CH2O)n-CH2CH3
(nは2~9の整数)
CH2=C(CH3)C(O)O-(CH2CH2O)n-CH2CH3
(nは2~9の整数)
(D)成分としては、硬化物の機械物性(伸び、強度)が良くなり、しかも電気絶縁性、耐電極変色、低粘度化の効果が得られる点で、(B)成分と併用することが好ましい。
<<(C)成分>>
本発明の(C)成分の例としては、光重合開始剤、熱重合開始剤、レッドクス開始剤等が挙げられる。
熱重合開始剤は、単独で用いても、2種以上を併用してもよい。
レドックス系開始剤は、単独で用いても、2種以上を併用してもよい。
本発明の硬化性組成物は(A)成分のビニル系重合体、(B)成分のビニル系単量体、(C)成分の開始剤を含有し、必要により(D)成分のビニル系単量体を含有してなるが、物性を調整するために、さらに各種の添加剤、例えば、重合性のモノマー及び/またはオリゴマー、硬化調整剤、金属石鹸、充填材、微小中空粒子、可塑剤、接着性付与剤、溶剤、難燃剤、酸化防止剤、光安定剤、紫外線吸収剤、物性調整剤、ラジカル禁止剤、金属不活性化剤、オゾン劣化防止剤、リン系過酸化物分解剤、滑剤、顔料、発泡剤、光硬化性樹脂等を、必要に応じて適宜配合してもよい。これらの各種添加剤は、単独で用いてもよく、2種類以上を併用してもよい。
本発明の硬化性組成物は、本発明の効果を損なわない範囲で(B)成分、(D)成分以外の、モノマー及び/またはオリゴマーを添加することができる。ラジカル重合性の基を有する、モノマー及び/又はオリゴマーが、硬化性の点から好ましい。
ビニル系重合体へのエポキシ基導入は、公知の方法を利用することができる。例えば、特開2000-154212公報段落[0039]~[0056]記載の方法が挙げられる。好ましい例も同段落中に記載されている。
得られたビニル系重合体へのヒドロシリル化反応可能なアルケニル基の導入方法としては、公知の方法を利用することができる。例えば、特開2004-059783公報段落[0042]~[0086]記載の方法が挙げられる。さらに、好ましい例も同段落中に記載されている。
得られたビニル系重合体への加水分解性シリル基の導入方法としては、公知の方法を利用することができる。例えば、特開2000-191912公報段落[0076]~[0138]記載の方法が挙げられる。さらに、好ましい例も同段落中に記載されている。
本発明の硬化性組成物には、各種酸化防止剤を必要に応じて用いてもよい。これらの酸化防止剤としては、アミン系酸化防止剤、ヒンダードフェノール系酸化防止剤、リン系酸化防止剤、イオウ系酸化防止剤等が挙げられる。
具体的には、2,6-ジ-tert-ブチル-4-メチルフェノール、2,6-ジ-tert-ブチル-4-エチルフェノール、モノ(またはジあるいはトリ)(αメチルベンジル)フェノール、2,2'-メチレンビス(4エチル-6-tert-ブチルフェノール)、2,2'-メチレンビス(4メチル-6-tert-ブチルフェノール)、4,4'-ブチリデンビス(3-メチル-6-tert-ブチルフェノール)、4,4'-チオビス(3-メチル-6-tert-ブチルフェノール)、2,5-ジ-tert-ブチルハイドロキノン、2,5-ジ-tert-アミルハイドロキノン、トリエチレングリコール-ビス-[3-(3-t-ブチル-5-メチル-4ヒドロキシフェニル)プロピオネート]、1,6-ヘキサンジオール-ビス[3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート]、2,4-ビス-(n-オクチルチオ)-6-(4-ヒドロキシ-3,5-ジ-t-ブチルアニリノ)-1,3,5-トリアジン、ペンタエリスリチル-テトラキス[3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート]、2,2-チオ-ジエチレンビス[3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート]、オクタデシル-3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート、N,N'-ヘキサメチレンビス(3,5-ジ-t-ブチル-4-ヒドロキシ-ヒドロシンナマミド)、3,5-ジ-t-ブチル-4-ヒドロキシ-ベンジルフォスフォネート-ジエチルエステル、1,3,5-トリメチル-2,4,6-トリス(3,5-ジ-t-ブチル-4-ヒドロキシベンジル)ベンゼン、ビス(3,5-ジ-t-ブチル-4-ヒドロキシベンジルホスホン酸エチル)カルシウム、トリス-(3,5-ジ-t-ブチル-4-ヒドロキシベンジル)イソシアヌレート、2,4-2,4-ビス[(オクチルチオ)メチル]o-クレゾール、N,N'-ビス[3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオニル]ヒドラジン、トリス(2,4-ジ-t-ブチルフェニル)フォスファイト、2-(5-メチル-2-ヒドロキシフェニル)ベンゾトリアゾール、2-[2-ヒドロキシ-3,5-ビス(α,α-ジメチルベンジル)フェニル]-2H-ベンゾトリアゾール、2-(3,5-ジ-t-ブチル-2-ヒドロキシフェニル)ベンゾトリアゾール、2-(3-t-ブチル-5-メチル-2-ヒドロキシフェニル)-5-クロロベンゾトリアゾール、2-(3,5-ジ-t-ブチル-2-ヒドロキシフェニル)-5-クロロベンゾトリアゾール、2-(3,5-ジ-t-アミル-2-ヒドロキシフェニル)ベンゾトリアゾール、2-(2'-ヒドロキシ-5'-t-オクチルフェニル)-ベンゾトリアゾール、メチル-3-[3-t-ブチル-5-(2H-ベンゾトリアゾール-2-イル)-4-ヒドロキシフェニル]プロピオネート-ポリエチレングリコール(分子量約300)との縮合物、ヒドロキシフェニルベンゾトリアゾール誘導体、2-(3,5-ジ-t-ブチル-4-ヒドロキシベンジル)-2-n-ブチルマロン酸ビス(1,2,2,6,6-ペンタメチル-4-ピペリジル)、2,4-ジ-t-ブチルフェニル-3,5-ジ-t-ブチル-4-ヒドロキシベンゾエート等が挙げられる。
本発明の硬化性組成物は、全ての配合成分を予め配合密封した1液型として調製でき、また、開始剤や硬化触媒や架橋剤だけを抜いたA液と、開始剤や硬化触媒や架橋剤を充填材、可塑剤、溶剤等と混合したB液を成形直前に混合する2液型としても調製できる。
本発明の硬化物は、上記硬化性組成物を硬化させて得られるものである。
当該硬化性組成物を硬化させる方法としては、特に限定されない。
その他の開始剤としてレドックス系開始剤を用いる場合、硬化温度は、-50℃~250℃が好ましく、0℃~180℃がより好ましい。
本発明の硬化性組成物を成形体として用いる場合の成形方法としては、特に限定されず、一般に使用されている各種の成形方法を用いることができる。例えば、注型成形、圧縮成形、トランフファー成形、射出成形、押し出し成形、回転成形、中空成形、熱成形等が挙げられる。特に自動化、連続化が可能で、生産性に優れるという点から、ロール成形、カレンダー成形、押出し成形、液状射出成形、射出成形によるものが好ましい。
本発明の硬化性組成物および硬化物は、電極金属に接する電気・電子部品材料に好適であるが、特に限定されず、電線・ケーブル用絶縁被覆材等の電気絶縁材、シール材、接着剤、粘着剤、コンフォーマルコーティング剤、電気電子用ポッティング剤、放熱材、防水材、防振・制振・免振材、フィルム、マリンデッキコーキング、注型材料、または、成形材料に用いられる。
(ただし、1H-NMRはBruker社製ASX-400を使用し、溶媒として重クロロホルムを用いて23℃にて測定した。)
得られたポリマーおよび配合部の粘度は、JIS K 7117-2円すい-平板システムに準拠し、東機産業製E型粘度計を使用し、測定温度23℃で測定した。
通電高温高湿試験後、櫛型基板を目視で観察した。櫛型基板には陽極、陰極、電荷をかけない電極があり、これら電極金属間の変色差がないものを○、電極金属間の変色差があるものを×とした。
JIS K 6251に準じて、硬化物を2mm厚さ、3号ダンベルのサイズに切り出し、引張り速度200mm/分、23℃×55%RH条件下で測定した。引張り試験には、島津製オートグラフ、AG-2000Aを使用した。
JIS K 3197の8.5.4項の電圧印加耐湿性試験に準じて、櫛型基板を用いて試験した。櫛型基板の導体は銅、基材はガラスエポキシ(FR4)、導体幅は0.318mm、導体間隔は0.318mm、重ね代は15.75mmとした。櫛型基板に50μm厚さの塗膜を作製した後、導線をハンダ付けした。導線は高温高湿条件で使用できる被覆導線(フッソ樹脂被覆電線、1.2mmΦ、定格600V)を使用した。
恒温恒湿機内に櫛型基板を設置し、導線を恒温恒湿機外へ延ばして常時通電した。所定時間後、櫛型基板は高温高湿のままで、恒温恒湿機外へ延ばした導線末端で絶縁値を測定した。通電高温高湿試験条件はDC50V、85℃85%RH、500時間とした。
フュージョンUVシステムズ・ジャパン株式会社製、型式 LH6、Hバルブを使用した。紫外線硬化条件は1500mW/cm2、3000mJ/cm2とした。
アクリル酸n-ブチル100部を脱酸素した。反応容器の内部を脱酸素し、臭化第一銅0.17部、アクリル酸n-ブチルのうち20部、アセトニトリル4.4部、2,5-ジブロモアジピン酸ジエチル3.5部を添加して70℃で混合し、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)0.010部を添加し、重合反応を開始した。モノマー混合物80部を逐次添加し、重合反応を進めた。重合途中、適宜トリアミンを追加して重合速度を調整し、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、内温を約80℃~約90℃に保ちながら加熱攪拌した。揮発分を減圧除去して濃縮した。これを酢酸ブチルで希釈し、ろ過助剤を加えてろ過した。ろ液に対して吸着剤(協和化学工業製キョーワード700SEN、キョーワード500SH)を添加して加熱撹拌後、濾過してろ液を濃縮した。これをN,N-ジメチルアセトアミドに溶解させ、アクリル酸カリウム(末端Br基に対して約2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℃で加熱攪拌した。揮発分を減圧留去してから酢酸ブチルで希釈し、ろ過助剤を添加してろ過した。ろ液を濃縮し、両末端にアクリロイル基を有する「重合体II」を得た。
「重合体I」の数平均分子量は12,000、分子量分布は1.2、重合体1分子当たりに導入された平均のアクリロイル基数は1.8であった。
アクリル酸n-ブチル2部およびアクリル酸2-エチルヘキシル98部からなるモノマー混合物を脱酸素した。反応容器の内部を脱酸素し、臭化第一銅0.29部、モノマー混合物のうち20部、アセトニトリル8.9部、2,5-ジブロモアジピン酸ジエチル2.5部を添加して80℃で混合し、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)0.014部を添加し、重合反応を開始した。モノマー混合物80部を逐次添加し、重合反応を進めた。重合途中、適宜トリアミンを追加して重合速度を調整し、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、内温を約80℃~約90℃に保ちながら加熱攪拌した。揮発分を減圧除去して濃縮した。これを酢酸ブチルで希釈し、ろ過助剤を加えてろ過した。ろ液に対して吸着剤(協和化学工業製キョーワード700SEN、キョーワード500SH)を添加して加熱撹拌後、濾過してろ液を濃縮した。これをN,N-ジメチルアセトアミドに溶解させ、アクリル酸カリウム(末端Br基に対して約2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℃で加熱攪拌した。揮発分を減圧留去してから酢酸ブチルで希釈し、ろ過助剤を添加してろ過した。ろ液を濃縮し、両末端にアクリロイル基を有する「重合体II」を得た。
「重合体II」の数平均分子量は13500、分子量分布は1.3、重合体1分子当たりに導入された
平均のアクリロイル基数は1.6であった。
配合方法を説明する。製造例1または2で得た(A)成分の「重合体I」または「重合体II」
に酸化防止剤を添加し、120℃で2時間加熱混合して、酸化防止剤を「重合体I」または「重合体II」に溶かした。50℃以下に冷却してから、(B)成分、(D)成分、(C)成分、その他成分を
添加し、攪拌脱泡装置((株)シンキー製、ARE-250)で均一にした。なお(C)成分は、DAROCUR1173(チバ・ジャパン製)と、IRGACURE819(チバ・ジャパン製)を予め加熱溶解したものを使用した。配合量(「重量部」)を表1~3に示す。なお表中、(B)成分のライトアクリレートDCP-Aはジメチロール-トリシクロデカンジアクリレート、V#260は1,9-ノナンジオールジアクリレート、(D)成分のISTAはイソステアリルアクリレート、IBXAはイソボルニルアクリレート、FA-513Aはジシクロペンタニルアクリレート、酸化防止剤のナウガード445は4,4'-ビス(α,α'―ジメチルベンジル)ジフェニルアミン、IRGANOX1010はテトラキス-[メチレン-3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート]メタンを示す。
Claims (15)
- (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の有機基を示す)で表わされる(メタ)アクリロイル系基を、分子末端に1分子あたり少なくとも1個以上有するビニル系重合体、
(B)一般式(2):
Rb-(OC(O)C(Ra)=CH2)n (2)
(式中、Raは水素原子又は炭素数1~20の有機基、Rbは炭素数6~20の有機基、nは2~6の整数を示す)で表わされる(メタ)アクリロイル系基を有するビニル系単量体、及び、
(C)開始剤、
を含有する電気、電子部品材料用組成物であって、
(A)成分と(B)成分の合計100重量%に対して、(B)成分を25重量%以上、45重量%以下含有することを特徴とする電子部品材料用組成物。 - (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の有機基を示す)で表わされる(メタ)アクリロイル系基を、分子末端に1分子あたり少なくとも1個以上有するビニル系重合体、
(B)一般式(2):
Rb-(OC(O)C(Ra)=CH2)n (2)
(式中、Raは水素原子又は炭素数1~20の有機基、Rbは炭素数6~20の有機基、nは2~6の整数を示す)で表わされる(メタ)アクリロイル系基を有するビニル系単量体、
(D)一般式(3):
RC-OC(O)C(Ra)=CH2 (3)
(式中、Raは水素原子又は炭素数1~20の有機基、RCは炭素数6~20の有機基を示す)で表わされる(メタ)アクリロイル系基を有するビニル系単量体、及び
(C)開始剤、
を含有する電気、電子部品材料用組成物であって、
(A)成分と(B)成分と(D)成分の合計100重量%に対して、(B)成分と(D)成分の合計が25重量%以上、65重量%以下、かつ(B)成分が5重量%以上含有する電気、電子部品材料用組成物。 - (A)成分と(B)成分と(D)成分の合計100重量%に対して、(B)成分と(D)成分の合計が30重量%以上、55重量%以下、かつ(B)成分が15重量%以上含有する請求項2に記載の電気、電子部品材料用組成物。
- (C)成分の量が、(A)成分、(B)成分、(D)成分の合計100重量部に対して、0.001~10重量部であることを特徴とする請求項1~3に記載の電気、電子部品材料用組成物。
- (A)成分の主鎖が、アクリル酸エステル系単量体を重合して製造される請求項1~4のいずれかに記載の電気、電子部品材料用組成物。
- (A)成分の主鎖が、リビングラジカル重合法により製造される請求項1~5のいずれかに記載の電気、電子部品材料用組成物。
- (A)成分の主鎖が、原子移動ラジカル重合法により製造される請求項6記載の電気、電子部品材料用組成物。
- (A)成分の主鎖が、連鎖移動剤を用いたビニル系単量体の重合により製造される請求項1~5のいずれかに記載の電気、電子部品材料用組成物。
- (A)成分の数平均分子量が、3000以上である請求項1~8のいずれかに記載の電気、電子部品材料用組成物。
- (A)成分のビニル系重合体が、ゲルパーミエーションクロマトグラフィーで測定した重量平均分子量と数平均分子量の比の値が1.8未満である請求項1~9のいずれかに記載の電気、電子部品材料用組成物。
- (B)成分が、(メタ)アクリロイル系基を一分子中に2個有するビニル系単量体である請求項1~10のいずれかに記載の電気、電子部品材料用組成物。
- (C)成分が光ラジカル開始剤である請求項1~11のいずれかに記載の電気、電子部品材料用組成物。
- 請求項1~12のいずれかに記載の電気、電子部品材料用組成物が電極金属に接する電気、電子部品材料用組成物。
- 請求項1~13のいずれかに記載の電気、電子部品材料用組成物を硬化して得られる電気、電子部品材料。
- 請求項1~13のいずれかに記載の電気、電子部品材料用組成物を、活性エネルギー線または熱により硬化して得られる硬化物。
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US20130165593A1 (en) | 2013-06-27 |
CN103080163A (zh) | 2013-05-01 |
EP2612873B1 (en) | 2017-07-26 |
JP5883387B2 (ja) | 2016-03-15 |
US9133330B2 (en) | 2015-09-15 |
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