WO2004035558A1 - 脂環式ジエポキシ化合物の製造方法、硬化性エポキシ樹脂組成物、電子部品封止用エポキシ樹脂組成物、電気絶縁油用安定剤、および電気絶縁用注型エポキシ樹脂組成物 - Google Patents
脂環式ジエポキシ化合物の製造方法、硬化性エポキシ樹脂組成物、電子部品封止用エポキシ樹脂組成物、電気絶縁油用安定剤、および電気絶縁用注型エポキシ樹脂組成物 Download PDFInfo
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- WO2004035558A1 WO2004035558A1 PCT/JP2003/011287 JP0311287W WO2004035558A1 WO 2004035558 A1 WO2004035558 A1 WO 2004035558A1 JP 0311287 W JP0311287 W JP 0311287W WO 2004035558 A1 WO2004035558 A1 WO 2004035558A1
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- epoxy resin
- resin composition
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- alicyclic diepoxy
- curing
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D301/00—Preparation of oxiranes
- C07D301/02—Synthesis of the oxirane ring
- C07D301/03—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds
- C07D301/19—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with organic hydroperoxides
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D303/00—Compounds containing three-membered rings having one oxygen atom as the only ring hetero atom
- C07D303/02—Compounds containing oxirane rings
- C07D303/04—Compounds containing oxirane rings containing only hydrogen and carbon atoms in addition to the ring oxygen atoms
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D301/00—Preparation of oxiranes
- C07D301/02—Synthesis of the oxirane ring
- C07D301/03—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds
- C07D301/14—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with organic peracids, or salts, anhydrides or esters thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/02—Polycondensates containing more than one epoxy group per molecule
- C08G59/027—Polycondensates containing more than one epoxy group per molecule obtained by epoxidation of unsaturated precursor, e.g. polymer or monomer
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
- C08G59/22—Di-epoxy compounds
- C08G59/24—Di-epoxy compounds carbocyclic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/40—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes epoxy resins
Definitions
- the present invention relates to a method for producing an alicyclic diepoxy compound, which is obtained by reacting an unsaturated group-containing compound having a bicyclohexyl 3,3′-one skeleton with an organic percarboxylic acid.
- the present invention also relates to a curable resin composition containing the diepoxy compound as an essential component and a cured product thereof. This resin composition is useful in various fields including applications such as coatings, inks, adhesives, sealants, and sealing materials.
- the present invention also relates to an epoxy resin composition for encapsulating electronic components such as semiconductors, which comprises the alicyclic diepoxy compound as an essential component and has excellent moisture resistance and high fluidity.
- the present invention also relates to a stabilizer for electric insulating oil and an electric insulating oil. More specifically, the present invention relates to a stabilizer for electric insulating oil and an electric insulating oil comprising the alicyclic diepoxy compound and having improved stability over a long period of time. Further, the present invention relates to an epoxy resin composition containing the alicyclic diepoxy compound, a castable epoxy resin composition for electric insulation having a low viscosity and good workability comprising an inorganic filler and the like as essential components, and a cured product thereof. It is. Background art
- epoxy resins various types of polyfunctional epoxy compounds having two or more alicyclic skeletons in a molecule
- epoxy resins are commercially available.
- 3,4-epoxycyclohexylmethyl-3 ', 4'-epoxycyclohexanecarboxylate for example, Celloxide 2021 manufactured by Daicel Chemical Industries and Union Carbide ERL422
- 1,2,8,9-diepoxylimonene for example, Celloxide 3000 manufactured by Daicel Chemical Industries
- JP-A-4-136263 and JP-A-4-170411 are commercially available.
- 3,4-epoxycyclohexylmethyl-3 ', 4'-epoxycyclohexanecarboxylate for example, Celloxide 2021 manufactured by Daicel Chemical Industries and Union Carbide
- 1,2,8,9-diepoxylimonene for example, Celloxide 3000 manufactured by Daicel Chemical Industries
- JP-A-4-136263 and JP-A-4-170411 for example
- GT300 series manufactured by Daicel Chemical Industries
- epoxidized butanetetra-poturopyronic acid tetrakis-3-cyclohexenylmethyl ester and its ⁇ -force prolactone addition are also commercially available as curable epoxy compounds having a plurality of alicyclic epoxy groups.
- a cured product can be obtained by reacting these polyfunctional epoxy compounds with various curing agents and curing catalysts.
- This epoxy resin cured product can have the heat resistance, transparency, and good dielectric properties that are characteristic of a resin using a compound having an alicyclic skeleton. It is useful as an intermediate in the manufacture of adhesives, inks, sealant components or other compounds useful in a variety of end uses, including pharmaceuticals and medical supplies.
- Celloxide 3000 has a methyl group on the carbon atom constituting the epoxy group, and therefore has low reactivity due to its steric hindrance.
- Celloxide 2021, Celloxide 2081, and ERL 4299 have an ester group in the molecule and are hydrolyzable.When used under high temperature and high humidity conditions or when used under conditions where strong acids are generated, etc. The physical properties of the cured product sometimes deteriorated.
- dicyclohexyl_3,3 is a typical alicyclic diepoxy compound represented by the following general formula (I).
- '—Diepoxides are disclosed.
- hydrogen peroxide (however, hydrogen peroxide refers to t-butylhydroxide) and a catalytic amount of molybdenum (V) chloride are used as epoxidizing agents for the synthesis. .
- epoxy resin cured products generally have excellent performance in terms of mechanical properties, water resistance, corrosion resistance, adhesion, chemical resistance, heat resistance, and electrical properties. It is used in a wide range of fields such as laminates, IC encapsulants, and molding materials.
- a general-purpose aromatic epoxy resin which is a darisidyl ether type epoxy resin represented by a bisphenol type epoxy resin, a phenol nopolak type epoxy resin, etc., comprises a curing agent and, in some cases, a curing accelerator.
- fillers such as talc, titanium, and silica are also added, and cured under various curing conditions to be used as a cured product.
- a cured product composed of a general-purpose aromatic epoxy resin which is the glycidyl ether type epoxy resin
- a general-purpose aromatic epoxy resin which is the glycidyl ether type epoxy resin
- the viscosity of the glycidyl ether type epoxy resin as described above is measured at 25 using an E-type rotational viscometer (for example, manufactured by Tokyo Keiki Co., Ltd.)
- the viscosity of the bisphenol A type is 4000 to 20000 mPa * s
- Glycidyl ether type epoxy resin is generally low in fluidity, such as bisphenol F type of 1500 to 4500 mPas, so it dissolves in solvents represented by toluene, xylene, methyl ethyl ketone, ethyl acetate, etc. It is often used and has problems in workability and environmental safety.
- Epoxy resins having a sufficiently low viscosity without using a diluent are known to have a cyclohexoxide skeleton (alicyclic skeleton).
- Epoxy having an alicyclic skeleton A variety of compounds are currently available on the market, characterized by having the same reactivity as the daricidyl ether type epoxy compound.
- monofunctional epoxy compounds having an alicyclic skeleton in the molecule include monoepoxidized 4-vinylcyclohexene, and bifunctional epoxy compounds include 4-vinylcyclohexene diepoxide perimonene diepoxide.
- These compounds having an alicyclic skeleton are derived from the fact that no halide is used in the production process: they are halogen-free and have excellent electrical properties. In addition, heat resistance and transparency, which are characteristics of a resin using a compound having an alicyclic skeleton, can be imparted.
- These epoxy compounds having an alicyclic skeleton or resin compositions containing the same are used for various end uses including coatings, adhesives, inks, sealant components, stabilizers for various thermoplastic resins or pharmaceuticals and medical supplies. It is also known to be useful as an intermediate for producing another useful compound.
- Epoxy compounds having these alicyclic skeletons have sufficient performance for use in the above applications, but have slightly lower reactivity, and the physical properties and reactivity of the cured product may decrease. Thus, highly reactive alicyclic epoxy compounds are desired. Furthermore, the above-mentioned monoepoxidized 4-vinylcyclohexene and limonene diepoxide volatilize at room temperature, and thus have a problem in the working environment.
- an alicyclic diepoxy compound similar to the alicyclic diepoxy compound represented by the general formula (I) according to the present invention an alicyclic diepoxy compound having two alicyclic structures linked by a methylene group or the like. (Eg, Japanese Patent Application Laid-Open No. 58-172,872, Japanese Patent Publication No. 50-106366).
- curable resin composition in which an oxetane compound, a cationic polymerization initiator, and an alicyclic epoxide compound are blended or modified has been proposed (for example, Japanese Patent Application Laid-Open No. 2002-53659).
- any of these curable resin compositions containing an alicyclic diepoxy compound has not yet achieved satisfactory performance.
- the present inventor has proposed an alicyclic diepoxy compound represented by the following general formula (I), The present inventors have found that a curable epoxy resin composition containing an ON or photothione polymerization initiator or an acid anhydride and a cured product obtained by curing the same have excellent properties.
- electronic components such as diodes, transistors, and integrated circuits are sealed with a thermosetting resin.
- 0-cresol novolak type epoxy or biphenyl is excellent in heat resistance and moisture resistance.
- the most common type is a system composed of epoxy resin of the noble type and phenol resin of the nopolak type.
- the surface mounting method differs from the insertion mounting method in that the entire package sealed with sealing resin is heated to a high temperature of 210 to 270 during soldering during the mounting process. For this reason, cracks occur in the resin portion, cracks and peeling occur around the chip, and the reliability is reduced, and a problem occurs that the resin cannot be used as a product.
- interfacial peeling is considered to be caused by volume shrinkage that occurs when a curable resin such as an epoxy resin is cured, or thermal stress inside the package, which is caused by the difference in linear expansion coefficient between the metal and the epoxy resin molding material. I have.
- resins for sealing electronic components Various polyfunctional epoxy compounds having an alicyclic skeleton in a molecule are known as resins for sealing electronic components.
- 1,2,8,9-diepoxylimonene has a lower reactivity of the epoxy group as compared with the one without the methyl group because the carbon constituting the epoxy group has a methyl group.
- 3,4-epoxycyclohexylmethyl 3 ', 4'-epoxycyclohexanecarboxylate and bis (3,4-epoxycyclohexylmethyl) adipate and its lactone adduct, epoxidized butanetetra-potassium tetraxyl-3 —Cyclohexenylmethyl ester and its ⁇ -force prolactone adduct may have hydrolysis due to the presence of ester groups in the molecule.
- the physical properties of the cured product may be reduced due to use or hydrolysis under high temperature and high humidity.
- an alicyclic epoxy compound similar to the alicyclic epoxy compound (a) represented by the above formula (I) is an alicyclic epoxy compound having two alicyclic structures linked by a methylene group or the like.
- Formula epoxy compounds are known (for example, Japanese Patent Application Laid-Open No. 2002-27591, Japanese Patent Application Laid-Open No. 58-172, 1987, Japanese Patent Application No. 50-106) No. 36). However, the epoxidation rate of this epoxy compound is rather low.
- Japanese Patent Application Laid-Open No. 2001-184814 discloses an epoxy resin composition for semiconductor encapsulation using a biphenyl-type epoxy resin, which is excellent in terms of water absorption.
- a biphenyl-type epoxy resin which is excellent in terms of water absorption.
- fluidity and hardening torque that is, moldability. Therefore, there is a demand for the development of an epoxy compound having another alicyclic skeleton having no ester group in the molecule and having excellent fluidity.
- the present inventor has expressed the following general formula (I): It has been found that the epoxy resin composition containing the alicyclic epoxy compound (a) and the curing agent has excellent properties as a resin composition for sealing electronic components.
- Japanese Patent Application Laid-Open Nos. 3-171510 and 7-226332 disclose a technique.
- An insulating oil for capacitors is disclosed.
- most of the epoxy compounds used are alicyclic diepoxy compounds and aromatic diepoxy compounds having an ester bond or an ether bond in the molecule. The substance may decompose thermally and lose its antioxidant function.
- capacitors generally have insulating oil sealed in a hermetically sealed structure, so they can be deformed by the gas generated by decomposition or the like, and the breakdown voltage decreases, resulting in a decrease in electrostatic capacity and make them unusable.
- the epoxy resin composition casting product in which the metal electrode is embedded is installed, and the conductor is supported by the metal electrode part. I have.
- Such an epoxy resin composition casting is generally manufactured using an epoxy resin composition comprising a polyfunctional epoxy resin, an acid anhydride, a filler and the like.
- bisphenol-type epoxy resin is used as the epoxy resin
- phthalic anhydride is used as the acid anhydride
- inorganic powder such as alumina and silica is used as the inorganic filler.
- an insulating resin is prepared by mixing bisphenol A type epoxy and crystalline epoxy with two or more acid anhydrides as epoxy resins. Is illustrated.
- the present invention (1) provides a process for producing an alicyclic diepoxy compound which has improved safety, is economical, is environmentally friendly, has low viscosity and does not contain an ester group in the molecule, and is easy to handle. With the goal.
- the present invention (2) provides a curable resin composition containing the same alicyclic diepoxy compound, thermal cation or photoionic polymerization initiator or acid anhydride as an essential component, and curing this composition.
- the purpose is to provide a cured product with excellent performance in terms of transparency, heat resistance, workability, work safety, etc., in addition to curing reactivity compared to the case where a conventional epoxy compound (resin) is used.
- the present invention (3) solves the above-mentioned problems of the resin for electronic component sealing by blending an alicyclic diepoxy compound represented by the following general formula (I), No deformation or disconnection of lead wires when sealing electronic circuit components such as conductor devices, and high flow It is an object of the present invention to provide an epoxy resin composition for sealing electronic components, which is excellent in heat resistance, filling property, and excellent in moisture resistance.
- Still another object of the present invention (4) is to provide a stabilizer for electric insulating oil and a stabilized electric insulating oil which have excellent oxidation stability over a longer period than conventional products.
- the present invention (5) provides a specific composition of an epoxy resin composition containing an alicyclic diepoxy compound represented by the following general formula (I), an acid anhydride, a curing accelerator, and an inorganic filler.
- an epoxy resin composition for electrical insulation is intended to give a cured product having excellent heat resistance, electrical properties and mechanical properties without impairing the casting workability. Things.
- a cast epoxy resin composition for electrical insulation having both excellent electrical and mechanical properties can be obtained, particularly by using fused alumina as the inorganic filler. It has been found that withstand voltage characteristics can be improved by 30 to 50% as compared with the case where fused alumina is used.
- the present inventors have conducted intensive studies to achieve the above-mentioned object. As a result, an economical, high-yield, high-purity diepoxy compound can be obtained by using an organic percarboxylic acid.
- the resin composition has low viscosity, excellent workability, and excellent curability, and the cured product obtained has excellent heat resistance and electrical properties.
- the present inventors have found that the present invention is effective as a stabilizer for use, and have completed the present invention (1) to (5).
- a first aspect of the present invention is to provide an alicyclic diolefin represented by the following general formula (II): General formula (I) characterized in that the compound is epoxidized with an organic percarboxylic acid
- R 'to R 18 in the formula may each be the same or different. They are water atom, a halogen atom or an oxygen atom or a substituted hydrocarbon group include a halogen atom, or a substituted It is an alkoxy group which may have a group.
- a second aspect of the present invention provides the method for producing the alicyclic diepoxy compound according to the first aspect of the present invention, wherein the organic percarboxylic acid is substantially free of water obtained by oxidation of a corresponding aldehyde with oxygen.
- a third aspect of the present invention provides the method for producing the alicyclic diepoxy compound according to the first or second aspect, wherein the water content in the organic percarboxylic acid is 0.8% by weight or less.
- a fourth aspect of the present invention provides the method for producing an alicyclic epoxy compound according to the first aspect of the present invention, wherein the organic percarboxylic acid is peracetic acid.
- a fifth aspect of the present invention provides the method for producing an alicyclic diepoxy compound according to the fourth aspect, wherein the peracetic acid is an ethyl acetate solution.
- the peracetic acid is an ethyl acetate solution.
- ⁇ to 18 may be the same or different. These are a hydrogen atom, a halogen atom, a hydrocarbon group which may contain an oxygen atom or a halogen atom, or a substituent. It is an alkoxy group which may be present.
- a curable epoxy resin composition characterized by comprising a resin (D).
- a seventh aspect of the present invention provides the curable epoxy resin composition according to the sixth aspect, wherein the alicyclic diepoxy compound represented by the general formula (I) is bicyclohexyl-3,3′diepoxide.
- An eighth aspect of the present invention provides the curable epoxy resin composition according to the sixth or seventh aspect, wherein the photothion polymerization initiator is a sulfonium salt-based photothion polymerization initiator.
- a ninth aspect of the present invention provides the curable epoxy resin composition according to the sixth or seventh aspect, wherein the acid anhydride is methylhexahydrophthalic anhydride.
- a tenth aspect of the present invention provides a cured product obtained by curing the curable epoxy resin composition according to any of the sixth to ninth aspects.
- R 'R' 8 in the formula may each be the same or different. They are water It is a hydrogen atom, a halogen atom, an oxygen atom, a hydrocarbon group which may contain a halogen atom, or an alkoxy group which may have a substituent. )
- the present invention provides an epoxy resin composition for sealing electronic parts, comprising:
- a twelfth aspect of the present invention provides the epoxy resin composition for electronic component sealing according to the eleventh aspect of the present invention, wherein the alicyclic diepoxy compound (a) is bicyclohexyl-3,3 ′ diepoxide.
- a thirteenth aspect of the present invention is the electronic component according to the above invention 11 or 12, wherein the curing agent (b) is at least one selected from an amine curing agent, an acid anhydride curing agent, and a phenolic resin. It is an epoxy resin composition for sealing.
- a fourteenth aspect of the present invention is the epoxy resin composition for electronic component sealing according to the eleventh aspect of the present invention, wherein the other epoxy resin (e) is a cresol novolac epoxy resin.
- a fifteenth aspect of the present invention provides a cured product obtained by curing the epoxy resin composition for sealing electronic components according to any one of the above inventions 11 to 14.
- R 'to R 18 in the formula may each be the same or different. They are water atom, a halogen atom, an oxygen atom or a substituted hydrocarbon group include a halogen atom, or a substituent Is an alkoxy group which may have
- a stabilizer for an electrical insulating oil comprising an alicyclic diepoxy compound represented by the formula:
- a seventeenth aspect of the present invention provides the electrical insulating oil stabilizer according to the sixteenth aspect of the present invention, wherein R ′ to R ′ 8 in the alicyclic diepoxy compound represented by the general formula (I) are all hydrogen atoms. You.
- a eighteenth aspect of the present invention is the present invention, wherein the alicyclic epoxy compound represented by the general formula (I) is obtained by epoxidizing a corresponding diolefin compound with an organic percarboxylic acid substantially free of water. 16.
- a nineteenth aspect of the present invention provides the electric insulating oil stabilizer according to the eighteenth aspect, wherein the water content in the organic percarboxylic acid is 0.8% by weight or less.
- a twenty-first aspect of the present invention provides the electric insulating oil stabilizer according to the eighteenth or nineteenth aspect of the present invention, wherein the organic percarboxylic acid is a solution in an organic solvent.
- a twenty-first aspect of the present invention provides the electrical insulating oil stabilizer according to any one of the above-described present inventions 16 to 20, which is a stabilizer for an insulating oil for a capacitor.
- the stabilizer for electric insulating oil according to any one of the present invention 16 to 21 is mixed with 0.05 to 15 parts by weight based on 100 parts by weight of the insulating oil component.
- an electric insulating oil characterized by the following.
- thermosetting resin composition for electrical insulation containing a thermosetting resin and an inorganic filler, wherein the thermosetting resin has the following (A) to (C) Component (A) Epoxy resin composition
- IT to R 18 may be the same or different. These are a hydrogen atom, a halogen atom, a hydrocarbon group which may contain an oxygen atom or a halogen atom, or a substituent. Is an alkoxy group which may have
- the proportion of component (B) is in the range of 0.6 to 1.0 equivalent per equivalent of component (A), and the total amount of component (C) is (A) and (B). 0.5 to 10 parts by weight with respect to 100 parts by weight, wherein the component (D) comprises 30 to 80% by weight based on the total amount of the components (A) to (D).
- a resin composition is provided.
- the twenty-fourth aspect of the present invention is the casting mold for electrical insulation according to the twenty-third aspect, wherein the alicyclic diepoxy compound (a-1) represented by the general formula (I) is bicyclohexyl-3,3′-diepoxide.
- a oxy resin composition is provided.
- the twenty-fifth invention provides the cast epoxy resin composition for electrical insulation according to the twenty-third invention, wherein the acid anhydride is methylhexahydrophthalic anhydride or methylnorbornenedicarboxylic anhydride.
- the twenty-sixth invention provides the cast epoxy resin composition for an electrical insulation according to the twenty-third invention, wherein the curing accelerator is ethylene glycol or diazabicycloundecene.
- the 27th invention provides the cast epoxy resin composition for electrical insulation according to the 23rd invention, wherein the inorganic filler is spherical fused silica or fused alumina.
- the epoxy compound (a-2) is selected from 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate, a bisphenol-type epoxy resin and a nopolakphenol-type epoxy resin.
- At least one of the invention's twenty-third invention provides a cast epoxy resin composition for electrical insulation.
- a cured product obtained by curing the cast epoxy resin composition for electrical insulation according to any of the twenty-third to twenty-eighth aspects.
- FIG. 1 shows an NMR chart of the alicyclic diepoxy compound obtained in Example 1.
- the alicyclic diepoxy compound represented by the general formula (I) according to the present invention (1) is obtained by converting an unsaturated compound represented by the general formula (II) having a bicyclohexyl-3,3′-gene skeleton into an organic compound. It is produced by oxidation with a carboxylic acid.
- R i to R 18 may be the same or different. These are a hydrogen atom, a halogen atom, a hydrocarbon group which may contain an oxygen atom or a halogen atom, or an alkoxy group which may have a substituent.
- the unsaturated compound having a bicyclohexyl-3,3′-one skeleton is generally synthesized by a dehydration reaction of a compound having a hydroxyl group.
- the production method is described in New Experimental Chemistry Course 14 “Maruzen Co., Ltd., Publishing, Synthesis and Reaction of Organic Compounds (I)”, P114-127, JP-A-581-172387, JP-A-2000-169399. And can be synthesized from a compound having a cyclohexanol structure.
- the alicyclic epoxy compound can be produced by reacting an unsaturated compound having a bicyclohexyl-3,3′-gene skeleton with an organic percarboxylic acid.
- the epoxidizing agent is an organic percarboxylic acid (organic percarboxylic acid refers to formic acid, peracetic acid, perbenzoic acid, perisobutyric acid, trifluoroperacetic acid and the like). ) Can be used.
- organic percarboxylic acids peracetic acid is a preferred epoxidizing agent because it has the reactivity necessary for producing the alicyclic epoxy compound of the present invention and has high stability.
- an organic percarboxylic acid which is substantially free of water specifically, a water content of 0.8% by weight or less, preferably 0.6% by weight or less provides a high epoxidation rate. Is preferred in that a compound having the same is obtained.
- the organic percarboxylic acid substantially free of water referred to in the present invention (1) is produced by air oxidation of aldehydes, for example, acetoaldehyde. It is produced by the method described in No. 418,465 or JP-A-54-306.
- an organic percarboxylic acid is synthesized from hydrogen peroxide, and a large amount of the organic percarboxylic acid is continuously synthesized in a larger amount than when organic percarboxylic acid is produced by extracting with a solvent. And can be obtained at substantially lower cost.
- epoxidizing agent there is no strict limit on the amount of epoxidizing agent, and the optimum amount in each case is determined by the variable factors such as the reactivity of the individual epoxidizing agent or alicyclic olefin compound used, and the desired epoxidation ratio.
- the epoxidation reaction is carried out by adjusting the use or nonuse of a solvent and the reaction temperature according to the equipment and physical properties of the raw materials.
- a solvent it can be used for the purpose of lowering the viscosity of the raw material, stabilizing by diluting the epoxidizing agent, and in the case of peracetic acid, esters, aromatic compounds, ethers and the like can be used.
- Particularly preferred solvents are ethyl acetate, hexane, cyclohexane, toluene, benzene and the like, and among them, ethyl acetate is particularly preferred.
- the reaction temperature is determined by the reactivity between the epoxidizing agent used and the unsaturated group-containing compound.
- the reaction temperature when using the preferred epoxidizing agent peracetic acid is 20 to 7 0 is preferred. If it is less than 20, the reaction is slow, and if it exceeds 70, peracetic acid is undesirably exothermic and decomposes.
- the charged molar ratio of the epoxidizing agent to the unsaturated bond can be changed depending on the purpose such as how much the unsaturated bond is to be retained.
- the epoxidizing agent is preferably added in an amount of 1.0 to 3.0 mol, more preferably 1.05 to 1.5 mol, per 1 mol of the unsaturated group. It is usually disadvantageous to exceed 3.0 moles due to economic and side reaction problems. According to the production method of the present invention (1), it is not necessary to use an expensive epoxidizing agent or catalyst.
- the crude liquid obtained by the reaction may be agitated for 1 to 5 hours to be matured.
- Isolation of the epoxy compound from the obtained crude liquid is carried out by an appropriate method, for example, a method in which the solvent is distilled with a poor solvent, a method in which the epoxidized product is poured into hot water with stirring, and the solvent is distilled off, It can be performed by a solvent method or the like.
- the alicyclic epoxy compound represented by the general formula (I) produced by the production method of the present invention (1) can be used for various coatings by homopolymerization, copolymerization or reaction with another compound. It can produce intermediates for inks, adhesives, sealants, molded articles, or other applications using them.
- Examples of end uses using the alicyclic diepoxy compound represented by the general formula (I) include acid removers, furniture coatings, decorative coatings, beverage cans and other can coatings, adhesives, automotive undercoats, Sealers: Finish paints, inks for text or image information, sealants for electronic components, photoresists suitable for developing printing plates or printed circuit boards, cast printing rolls, unsaturated polyesters and styrene.
- end uses including moldings, solvents, flame retardants, pharmaceuticals and medical supplies made with molding or sheet forming compounds reinforced with glass, carbon, graphite or other fibers. There are intermediates for producing other useful compounds.
- the alicyclic diepoxy compound represented by the general formula (I) may have heat resistance, transparency, and good dielectric characteristics, which are characteristics of a resin using a compound having an alicyclic skeleton. In monkey. Next, the present invention (2) will be described in detail.
- the present invention (2) relates to a curable epoxy resin composition containing a diepoxy compound having an alicyclic skeleton without an ester bond as an essential component, and a cured product thereof.
- IT to R 18 may be the same or different. These are a hydrogen atom, a halogen atom, an oxygen atom, or a hydrocarbon group which may contain a halogen atom, or a substituent. Which may have an alkoxy group)
- the alicyclic diepoxy compound (A) represented by the formula (I) is known.
- the production method of the present invention (1) Japanese Patent Application No. 2002-260490, and Russian literature (Ne ftekh imiya, 1972, 1) It can be produced by the method described in 2, 353).
- those produced by epoxidation of the corresponding diolefin compound using an organic percarboxylic acid having a low water content have a high content of the diepoxy compound.
- Specific examples of the alicyclic diepoxy compound (A) represented by the general formula (I) include bicyclohexyl_3,3′-diepoxide in which Ri to R 18 are all hydrogen atoms.
- the curable epoxy resin composition of the present invention (2) contains, as an essential component, a curing agent (B) in addition to the alicyclic diepoxy compound (A) represented by the general formula (I), and further comprises another epoxy. It may contain the resin (D), a curing accelerator, and other fillers and additives.
- the curable epoxy resin composition of the present invention (2) comprises, as an essential curing agent (B), a photo-induced thione polymerization initiator (b) 1) Or it contains a thermal cationic polymerization initiator (b 2) or an acid anhydride (C), so it can be cured and polymerized by light or heat.
- Photoinitiated thione polymerization initiator sulfodium salt-based UVACURE 1590, UVACURE 1591 (all manufactured by Daicel UCB), DAI CAT 11 (manufactured by Daicel Chemical), CD-I011 (manufactured by Sartoma), SI-60 L, SI-80L, SI-100L (above, manufactured by Sanshin Chemical Co., Ltd.), etc .; sodium salt-based DAI CAT 12 (manufactured by Daicel Chemical), CD-1012 (manufactured by SATOMA); And diazonium salt SP-150 and SP-170 (manufactured by Asahi Denka Kogyo KK).
- the photoinitiated thione polymerization initiators the above-mentioned SI-60L
- thermal cationic polymerization initiator (b2) a silanol-based cation catalyst such as triphenylsilanol or an aluminum chelate-based catalyst such as aluminum tris (acetylacetone) can be used.
- the cationic polymerization initiator is used in an amount of 100 parts by weight based on a total amount of 100 parts by weight of the alicyclic diepoxy compound represented by the general formula (I) and another epoxy resin added as needed. It is appropriate to add about 0.01 to 20 parts by weight, preferably about 0.1 to 5 parts by weight, more preferably about 0.1 to 3 parts by weight. If the amount is less than 0.01 part by weight, the thermosetting property is remarkably reduced, and if the amount is more than 20 parts by weight, the effect of increasing the amount is not recognized, which is uneconomical, and the physical properties of the cured product are deteriorated. No.
- an acid anhydride (C) can be used as a curing agent.
- the acid anhydrides include phthalic anhydride, maleic anhydride, trimellitic anhydride, tetrahydrofluoric anhydride, methyltetrahydrofluoric anhydride, methylnorporene dicarboxylic anhydride, and methylhexahydrofuran anhydride.
- Acid hexahydrophthalic anhydride, methylhymic anhydride, pyromellitic dianhydride, benzophenonetetracarboxylic dianhydride, 3,3 ', 4,4'-biphenyltetracarboxylic dianhydride object, Bis (3,4-dicarboxyphenyl) ether dianhydride, bis (3,4-dicarboxyphenyl) methane dianhydride, 2,2_bis (3,4-dicarboxyphenyl) propane dianhydride, etc. Having one or two aliphatic or aromatic rings in the molecule and one or two acid anhydride groups, and having 4 to 25 carbon atoms, and preferably 8 to 20 carbon atoms. A degree of acid anhydride is preferred.
- the content of the compound having a carboxyl group (COOH group) is 0.5% by weight or less (that is, 0 to 0.5% by weight), particularly 0.4% by weight or less (in short, , 0-0.4% by weight). If the content of carboxylic acid group is more than 0.5% by weight, crystallization may occur, which is not preferable.
- the content of the carboxyl group (COOH group) is 0.3% by weight or less based on the acid anhydride curing agent (that is, 0 to 0.3% by weight), and particularly 0.25% by weight or less ( That is, 0 to 0.25% by weight) is preferable for the same reason.
- the compounding amount of the acid anhydride is based on 1 mol of the total amount of epoxy groups in the alicyclic diepoxy compound represented by the general formula (I) and other epoxy resins to be added as necessary. It is desirable that the ratio of the acid anhydride groups is in the range of 0.3 to 0.7 mol. If the amount is less than 0.3 mol, the curability is insufficient. If the amount exceeds 0.7 mol, unreacted acid anhydride remains, which may lower the glass transition temperature. More preferably, it is in the range of 0.4 to 0.6 mol.
- an amidine compound such as 1,8-diazabicyclo (5,4,0) indene (DBU) or a curing accelerator such as triphenylphosphine, tetraphenylphosphonium, or tetraphenylporate is used as a curing accelerator.
- a curing accelerator such as triphenylphosphine, tetraphenylphosphonium, or tetraphenylporate
- organic phosphorus compounds, imidazole compounds such as 2-methylimidazole and the like can be used, but are not limited thereto.
- These curing accelerators may be used alone or as a mixture.
- the amount of the alicyclic diepoxy compound represented by the above general formula (I) The amount is preferably in the range of 0.4 to 20 parts by weight per 100 parts by weight of the total amount of the other epoxy resin and the polymerization initiator to be added as necessary.
- the compounding amount is less than 0.4 part by weight, sufficient curability may not be obtained during heat molding, while if it exceeds 20 parts by weight, curing is too fast and poor filling due to a decrease in fluidity during molding. This is not preferable because it may cause
- novolak epoxy resins such as phenol nopolak epoxy resin, brominated phenol nopolak epoxy resin, orthocresol nopolak epoxy resin, bisphenol A nopolak epoxy resin, bisphenol AD novolak epoxy resin, etc.
- Epoxy resin having tricyclodecenoxide group cycloaliphatic epoxy resin such as epoxidized dicyclopentene phenolic resin, aromatic epoxy resin such as epoxidized naphthalene phenolic resin, dimer monoacid Daricidyl ester type epoxy resins such as sidyl ester and tridaricidyl ester, tetraglycidylaminodiphenylmethane, triglycidyl p-aminophenol, triglycidyl-p-aminophenol, tetraglycidylme
- Glycidylamine-type epoxy resins such as taxylylenediamine and tetraglycidylbisaminomethylcyclohexane; hetero
- the amount of the other epoxy resin added as required is 1 to 100 parts by weight, preferably 100 to 100 parts by weight, based on 100 parts by weight of the alicyclic diepoxy compound represented by the general formula (I). 100 to 800 parts by weight, more preferably 100 to 500 parts by weight. When the amount is less than 1 part by weight, it is meaningless to add another epoxy resin added as needed. Conversely, when the amount is more than 100 parts by weight, the cured product is represented by the general formula (I). The excellent properties of the alicyclic diepoxy compound used are not obtained.
- thermoplastic resin such as polyethylene, polypropylene, polystyrene, polyethylene terephthalate, polycaprolactone, polycarbonate, or polyarylate may be used. it can.
- the curable epoxy resin composition of the present invention (2) includes polybutadiene and polybutadiene. Synthetic rubbers such as polystyrene copolymers and elastomers can also be used.
- a polyamide resin such as 6,6-nylon or a nitrogen-containing compound such as a polyimide resin can be used.
- the curable epoxy resin composition of the present invention (2) may also contain a phenol resin.
- a phenol resin for example, nopolak phenol resin, dicyclopentene copolymer type novolac phenol resin, naphthalene copolymerized novolak phenol resin, biphenyl unpolymerized nopolak phenol resin, xylene copolymerized nopolak phenol resin, cresol novolak phenol resin, dicyclopentyl resin Gen-copolymerized cresol nopolak phenol resin, naphthylene-copolymerized cresol nopolak phenol resin, biphenyl copolymerized cresol nopolak phenol resin, naphthalene copolymerized cresol nopolak phenol resin, resole phenol resin And dicyclopentene copolymerized resole resins, naphthylene copolymerized resole resins, biphenyl copolymerized resole resins, and xylene cop
- the amount of the phenolic resin such as polyethylene added as needed is 1 to 100 parts by weight, preferably 100 to 100 parts by weight, based on 100 parts by weight of the alicyclic diepoxy compound represented by the general formula (I). 100 to 800 parts by weight, more preferably 100 to 500 parts by weight. When the amount is less than 1 part by weight, it is meaningless to add polyethylene or the like. Conversely, when the amount is more than 100 parts by weight, the cured product is excellent in the alicyclic diepoxy compound represented by the general formula (I) No characteristics.
- the curable epoxy resin composition of the present invention (2) it is possible to use a filler if necessary.
- a filler Either an organic filler or an inorganic filler can be used as the filler, but an inorganic filler is preferable in consideration of a coefficient of thermal expansion.
- the organic filler examples include a thermoplastic resin containing a nitrogen atom such as an acrylic resin, a thermoplastic resin such as a polystyrene resin, a polyethylene resin, an epoxy resin, and a silicone resin, and a thermoplastic elastomer.
- examples of inorganic fillers include alumina, talc, glass powder, ceramic powder, crystalline silica, fused silica, and the like. The content of the filler does not adversely affect the effect of the present invention (2). As long as it is not particularly limited.
- additives usable in the present invention (2) include nitrogen atom-containing thermosetting resins, low-stress agents such as organic synthetic rubbers, carnauba wax, higher fatty acids, waxes such as synthetic waxes, carbon black and the like. Coloring agents, halogen trapping agents, leveling agents, curing accelerators and the like.
- a mixer such as a blender
- melt-knead using a hot roll, kneader, etc. cool, and pulverize.
- a molding method such as transfer molding, compression molding, injection molding, or the like.
- the curable epoxy resin composition of the present invention (2) has a temperature of 30 to 240, preferably
- 40 t preferably 90 to 200: more preferably 120 to 200: curing time 30 to 180 minutes, preferably 45 to 150 minutes, more preferably Is preferably 60 to 120 minutes) to prevent insufficient curing.
- the curable epoxy resin composition can be cured by irradiating light such as ultraviolet rays or active energy rays such as electron beams.
- a high-pressure mercury lamp, an ultra-high-pressure mercury lamp, a power-bon arc lamp, a xenon lamp, a metal halide lamp, or the like is used as a light source when performing ultraviolet irradiation.
- Irradiation time is light Depending on the type of source, the distance between the light source and the coating surface, and other conditions, it is at most tens of seconds, usually several seconds. After UV irradiation, heating can be performed as necessary to complete the curing.
- electron beam irradiation it is preferable to use an electron beam having an energy in the range of 50 to 1, OO OKeV and to set the irradiation amount to 2 to 5 Mrad.
- an irradiation source with a lamp output of about 80 to 30 OWZ cm is used.
- the curable composition Since the alicyclic diepoxy compound represented by the general formula (I), which is an essential resin component in the curable epoxy resin composition of the present invention (2), has a low viscosity, the curable composition also has a low viscosity. And has excellent workability. In addition, since it does not evaporate in the temperature range below 100, there is no effect on the working environment.
- the alicyclic diepoxy compound represented by the general formula (I), which is an essential resin component in the curable epoxy resin composition of the present invention (2) may be homopolymerized, copolymerized, or used as another resin. Reaction with the compounds can produce various coatings, inks, adhesives, sealants, molded or molded articles, or intermediates for other uses using these.
- Examples of end uses in which the alicyclic diepoxy compound represented by the general formula (I), which is an essential resin component in the curable epoxy resin composition of the present invention (2), can be used include: Develop acid removers, furniture coatings, decorative coatings, automotive priming, sealers, finish coats, beverage can and other can coatings, inks for textual or graphic information, sealants for electronic components, printing plates or printed circuit boards Photoresists, cast printing rolls, moldings made of unsaturated polyester and styrene based molding compositions or sheet forming compositions reinforced with glass, carbon, graphite or other fibers, There are solvents and flame retardants.
- the present invention (3) will be described in detail.
- the alicyclic diepoxy compound (a) represented by the above general formula (I), which is an essential resin component in the epoxy resin composition for electronic component sealing of the present invention (3), is a compound represented by the general formula (2) of the present invention (2).
- the other epoxy resin (e) optionally added to the alicyclic diepoxy compound (a) used in the present invention (3) may be any one as long as it has at least two epoxy groups in its molecule. There is no particular limitation on the molecular structure, molecular weight, and the like, and an epoxy resin that is usually used for semiconductor encapsulation can be used as it is. Specifically, the same ones as other epoxy resins added as needed in the present invention (2) are exemplified. Another epoxy resin may be used alone or in combination of two or more.
- the content of the other epoxy resin (e) added as needed is from 10 to 9 parts by weight in the total amount of 100 parts by weight with the alicyclic diepoxy compound (a) represented by the above general formula (I). 0 parts by weight, preferably 15 to 35, and more preferably 20 to 80.
- the content of the other epoxy resin (e) added as needed is less than 10 parts by weight, it is disadvantageous in cost, and if it exceeds 90 parts by weight, the effect of the alicyclic diepoxy compound (a) is small. .
- the curing agent (b), which is another essential component used in the present invention (3), can be cured by reacting with an epoxy resin such as an amine curing agent, an acid anhydride curing agent, and a phenolic resin. It is not particularly limited as long as it is one.
- amine-based curing agents include aromatic diamines such as metaphenylenediamine, diaminodiphenylmethane, and diaminodiphenylsulfone
- acid anhydride-based curing agents include maleic anhydride and anhydrous anhydride.
- Phenolic resin curing agents such as nopolak-type phenolic resin, cresol-type nopolak resin, para-xylylene-modified phenolic resin, para-xylylene aralkyl resin such as meta-xylylene-modified phenolic resin, terpene-modified phenol Resin, dicyclopentene-modified phenolic resin, triphenol propane and the like can be exemplified, but not limited thereto.
- a phenol resin-based curing agent is preferable in consideration of physical properties such as water absorption, and among them, a phenol aralkyl resin is particularly preferable.
- the mixing ratio of the alicyclic diepoxy compound (a) represented by the above formula (I) and the other epoxy resin (e) and the curing agent (b) added as required depends on the epoxy group and the functionality in the curing agent.
- the equivalent ratio of the groups (epoxy groups / functional groups) is in the range of 0.5 to 2, preferably 0.6 to 1. 2 It is not preferable to cure the composition at an equivalent ratio of less than 0.5 or more than 2 because the moisture resistance, moldability and electrical properties of the cured product deteriorate.
- the curing accelerator (c) is not particularly limited as long as it is a compound capable of promoting the curing reaction between the epoxy resin and the curing agent.
- amidine compounds such as 1,8-diazabicyclo (5,4,0) indene-7 (sometimes expressed as DBU), triphenylphosphine (sometimes expressed as TPP), tetraphenylphosphonium ⁇
- examples include, but are not limited to, organic phosphorus compounds such as tetraphenylporate and imidazole compounds such as 2-methylimidazole.
- the mixing amount is 100 parts by weight of the total amount of the alicyclic diepoxy resin (a) represented by the general formula (I), the other epoxy resin (e) and the curing agent (b) which are added as required. It is preferably in the range of 0.4 to 20 parts by weight. If the compounding amount is less than 0.4 parts by weight, sufficient curability may not be obtained during heat molding, while if it exceeds 20 parts by weight, curing is too fast and poor filling due to a decrease in fluidity during molding. This is not preferable because it may cause
- an inorganic filler (d) generally used for a sealing material can be used.
- specific examples include fused silica powder, fused spherical silica powder, crystalline silica powder, secondary agglomerated silica powder, alumina, aluminum hydroxide, and glass fiber, with fused spherical silica being particularly preferred.
- the shape of the spherical silica is preferably infinitely spherical in order to improve the fluidity, and the particle size distribution is preferably wide.
- the amount of the inorganic filler (d) is as follows: the alicyclic diepoxy compound (a) represented by the general formula (I), the other epoxy resin (e) added as needed, and the curing agent (b). ) Is preferably in the range of 200 to 240 parts by weight per 100 parts by weight of If the amount is less than 200 parts by weight, the reinforcing effect of the inorganic filler may not be sufficiently exerted. It is not preferable because deformation or disconnection may occur.
- the epoxy resin composition for electronic component sealing of the present invention (3) includes, in addition to the components (a) to (e), Further, if necessary, a flame retardant such as a brominated epoxy resin, antimony oxide, or a phosphorus compound; an inorganic ion exchanger such as bismuth oxide hydrate; a coupling agent such as aglycidoxypropyltrimethoxysilane; Coloring agents such as carbon black and red iron, silicone oil, low stress materials such as silicone rubber, natural wax, synthetic wax, higher fatty acids and release agents such as metal salts or paraffins, antioxidants, phosphoric acid or polyuri Various additives such as sodium salt or potassium salt of an acid may be appropriately compounded.
- a flame retardant such as a brominated epoxy resin, antimony oxide, or a phosphorus compound
- an inorganic ion exchanger such as bismuth oxide hydrate
- a coupling agent such as aglycidoxypropyltrimethoxysilane
- Coloring agents such
- the alicyclic diepoxy compound (a) represented by the general formula (I) and other epoxy resin added as necessary) After thoroughly mixing the curing agent, curing accelerator, layered compound, other inorganic fillers, and other additives with a mixer, etc., then melt-kneading them using a hot roll, kneader, etc., and then cooling , Smash.
- a molding method such as transfer molding, compression molding, or injection molding.
- the epoxy resin composition for encapsulating electronic components of the present invention (3) has a temperature of 65 to 200 t :, preferably 75 to: 190, more preferably 80 to: With L80, the curing time can be 30 to 600 minutes, preferably 45 to 540 minutes, more preferably 60 to 480 minutes.
- the curing temperature and the curing time are lower than the lower limit of the above range, the curing becomes insufficient.
- the curing temperature and the curing time are higher than the upper limit of the above range, the resin component may be decomposed.
- the curing conditions depend on various conditions, but when the curing temperature is high, the curing time is short, and when the curing temperature is low, the curing time is long, and can be appropriately adjusted.
- the present invention (4) will be described in detail.
- the epoxy compound used in the present invention (4) is an alicyclic diepoxy compound represented by the general formula (I), and the alicyclic diepoxy compound represented by the general formula (I) used in the present invention (2) or (3). It is the same as the compound. Among them, preferred is an alicyclic diepoxy compound in which R ′ to R 18 in the general formula (I) are hydrogen atoms, which are industrially produced.
- the amount of the alicyclic diepoxy compound represented by the general formula (I) used in the present invention (4) is in the range of 0.05 to 15 parts by weight based on 100 parts by weight of the insulating oil component. And 0.5 to 10 parts by weight, more preferably 0.5 to 5 parts by weight. If the amount is less than 0.05 parts by weight, there is no effect of trapping impurities in the insulating oil component or the effect of dispersing the discharge energy, and it becomes meaningless to add. Conversely, if the amount exceeds 10 parts by weight, the electrical properties of the insulating oil will be reduced.
- polyoxyalkylene glycol and its modified product neopentylpolyol ester, dibasic acid ester, polyester, fluorinated oil, etc. can be applied, and these can be used as one kind or as a mixture of one or more kinds. .
- polyoxyalkylene glycol examples include polyoxypropylene glycol, polyoxyethylene glycol, and polyoxyethylene polyoxypropylene glycol. 0 to 300 is preferable.
- the oxyethylene group and the oxypropylene group in the polyoxyethylenepolyoxypropylene glycol may be in random or block form.
- modified polyoxyalkylene glycol examples include polyoxyalkylene glycol monoalkyl ether, polyoxyalkylene glycol dialkyl ether, polyoxyalkylene glycol diester, polyoxyalkylene glycol diester, and alkylene oxide adduct of alkylene diamine.
- Specific examples thereof include ethers of the above polyoxyalkylene glycol and a linear or branched alkyl group having 1 to 18 carbon atoms, and esters of aliphatic carboxylic acids having 2 to 18 carbon atoms.
- polyoxyalkylene glycol glycerol triether, polyoxy Alkylene glycol haegent products (especially chlorinated products) can also be mentioned as modified products of the above polyoxyalkylene glycol.
- Neopentyl polyol esters include esters of neopentyl polyol with an aliphatic carboxylic acid having 2 to 18 carbon atoms, preferably 2 to 9 carbon atoms, or tricarboxylic acid and trimethylolpropane of the same aliphatic carbonic acid, and Penri Erythri! Ester with diphenyl, erythritol, and pentaerythritol is preferred.
- dibasic acid ester are esters of a divalent carboxylic acid having 4 to 12 carbon atoms and a primary or secondary alcohol having 4 to 18 carbon atoms, specifically, butyl phthalate, Hexyl phthalate and the like can be mentioned.
- polyester compounds described in JP-A-3-12891, JP-A-3-28992, etc., for example, dihydric alcohols having 5 to 12 carbon atoms and / or Polyester consisting of a polyhydric alcohol such as a trihydric or higher polyhydric alcohol having 15 or less carbon atoms and a monohydric fatty acid having 2 to 18 carbon atoms and / or a polybasic acid having 4 to 14 carbon atoms.
- a polyhydric alcohol such as a trihydric or higher polyhydric alcohol having 15 or less carbon atoms and a monohydric fatty acid having 2 to 18 carbon atoms and / or a polybasic acid having 4 to 14 carbon atoms.
- fluorinated oil examples include perfluoroether described in JP-A-3-77898.
- the stabilizer for the electric insulating oil of the present invention in addition to the alicyclic diepoxy compound represented by the above general formula (I), the stabilizer for the electric insulating oil may optionally be used within the scope of the present invention (4).
- An extreme pressure agent for example, an antioxidant such as tricresyl phosphate or ⁇ -naphthylbenzylamine, phenothiazine, or ⁇ can be used within the usual range of addition.
- the cast epoxy resin composition for electrical insulation of the present invention (5) (hereinafter referred to as “cast epoxy resin composition”) comprises an epoxy resin composition (A component) containing a specific epoxy compound, and an acid anhydride. It is obtained by using a thermosetting resin composed of (B component) and a curing accelerator (C component), and an inorganic filler (D component).
- the epoxy resin composition (A component) containing the above specific epoxy compound comprises an alicyclic diepoxy compound (a-1) represented by the general formula (I) and another epoxy compound (a-2). .
- the alicyclic diepoxy compound (a_l) is the same as that represented by the general formula (I) used in the present invention (2) to (4), and among them, R ′ to R ′ Those in which 8 is a hydrogen atom, that is, bicyclohexyl-3,3′-diepoxide are preferably used.
- the mixing ratio of the alicyclic diepoxy compound (a-1) represented by the general formula (I) and the other epoxy compound (a-2) is such that (a-1) is an epoxy resin composition (component A) It is preferably 8 to 75% by weight, and (a-2) is 95 to 20%, preferably 92 to 25% by weight so as to be 5 to 80% by weight (hereinafter abbreviated as "%") of the whole. % And must be set respectively.
- (a-2) include the same ones as other epoxy resins added as necessary in the present invention (2) to (3).
- the epoxy resin composition (component A) is constituted by using two types of epoxy compounds as described above, and by using an acid anhydride, a curing accelerator and an inorganic filler together with the epoxy resin composition.
- a cast epoxy resin composition for electrical insulation can be obtained which gives a cured product having excellent electrical and mechanical properties without impairing the intended castability.
- the acid anhydride (component B) used together with the epoxy resin composition (component A) acts as a curing agent for the epoxy resin composition (component A), and is not particularly limited and is conventionally known. That is, the acid-free group exemplified in the present invention (2). Water is used.
- acid anhydrides are used alone or in combination of two or more.
- methylhexahydride phthalic anhydride, tetrahydrofluoric anhydride, methylnorpolonenedicarboxylic anhydride, etc. are used because they have excellent heat resistance and further improve electrical properties and mechanical strength. Is preferred.
- the mixing ratio of the above-mentioned acid anhydride (component B) is the same as that of the epoxy compound (a-2) other than the alicyclic epoxy compound (a-1) and (a-1) represented by the general formula (I). It is necessary to set the epoxy resin composition (A component) in the range of 0.6 to 1.0 equivalent with respect to 1 equivalent. Particularly preferably, it is 0.7 to 0.9 equivalent. That is, when the compounding ratio of the acid anhydride exceeds 1.0 equivalent, the electrical properties are lowered, and when it is less than 0.6 equivalent, the heat resistance is lowered.
- the equivalent (acid anhydride equivalent) of the above-mentioned acid anhydride (component B) is set as follows.
- one equivalent of one acid anhydride group in the acid anhydride per one epoxy group in the component A is defined as one equivalent.
- the above mixing ratio of 0.6 to 1.0 equivalent refers to the epoxy resin composition (A component) containing the two types of epoxy compounds (a-1) and (a-2). The meaning is that the number of acid anhydride groups in the acid anhydride is 0.6 to 1.0 per one epoxy group.
- Examples of the curing accelerator (component C) used together with the component A and the component B include tertiary amines such as benzyldimethylamine, trisdimethylaminomethylphenol, and triethylenediamine, and tetrabutylammonium. Bromide or other quaternary amine bromide, diazabicycloundecene (DBU) or DBU organic acid salt, triphenylphosphine, phosphate, borate, Lewis acid, titanium or aluminum alkoxide diacetyl Organometallic compounds such as acetone and acetoacetate, imidazoles and the like can be mentioned. These may be used alone or in combination of two or more. In particular, it is preferable to use the above tertiary amines and quaternary amine bromide salts from the viewpoint that the heat resistance of the obtained cured product is excellent.
- tertiary amines and quaternary amine bromide salts from the viewpoint that the heat
- SA-102 diazabicycloundecene-based curing accelerator
- SA-506 diazabicycloundecene-based hardening accelerator
- U-CAT 503 phosphonium salt-based hardening accelerator
- the compounding amount of the curing accelerator (component C) is in the range of 0.5 to 10 parts by weight based on 100 parts by weight of the total of the epoxy resin composition (component A) composed of the two epoxy compounds. It is preferable to set to. In other words, if the amount of the component C is less than 0.5% by weight, the curing reaction becomes slow, causing a problem in workability.If the amount exceeds 10 parts by weight, the reaction time becomes remarkably fast, resulting in a decrease in fluidity. Also, there is a possibility that the volume resistivity may be reduced electrically.
- Examples of the inorganic filler which is the component (D) used as an essential component together with the components A to C include silica, alumina, talc, calcium sand, calcium carbonate, barium sulfate, and the like. These may be used alone or in combination of two or more. Above all, it is preferable to use spherical fused silica powder among silicas and fused alumina among aluminas from the viewpoint of excellent t an ⁇ ⁇ withstand voltage characteristics. In other words, among the silicas, the use of spherical fused silica powder suppresses interfacial polarization and eliminates the concentration of electrical stress, thereby further improving the dielectric loss tangent (tan ⁇ ) and withstand voltage characteristics.
- fused alumina is obtained using a Bayer process alumina or bauxite as a main raw material, and is melted in an electric furnace and subjected to a series of steps such as precipitation, calcination, pulverization, deironing, washing with water, and drying.
- alumina as in the case of using fused silica, both electrical and mechanical properties are excellent.
- withstand voltage characteristics are significantly improved compared to the case of using fused alumina.
- Fruit is obtained.
- the blending amount of the inorganic filler (D) should be in the range of 30 to 80% by weight based on the total of the components ( ⁇ ) to (D) of the cast epoxy resin composition for electric insulation of the present invention (5).
- Set to And are mandatory. That is, when the blending amount of the inorganic filler (D) is less than 30% of the entire composition, the melt viscosity of the cast epoxy resin composition for electric insulation of the present invention is remarkably reduced, and the content of the inorganic filler (D) is reduced. Settling occurs. Also, the mechanical strength decreases. Conversely, if it exceeds 80%, the viscosity becomes too high, and the mixing property and the fluidity are reduced, so that the workability may be reduced.
- the cast epoxy resin composition for electrical insulation of the present invention (5) may further contain, as necessary, a diluent, a plasticizer, and a filler other than the inorganic filler as the components A to C and the component (D).
- a diluent such as a pigment, a release agent, and a flame retardant can be appropriately compounded.
- each of the above-mentioned raw materials is blended at a predetermined ratio.
- a known blender such as a drive blender, a ribbon blender, and a Henschel mixer can be used for the blending, and the blending is usually performed at room temperature.
- the compound of each of the above-mentioned components is prepared as a cast resin composition for electrical insulation by stirring and mixing while eliminating air bubbles under vacuum heating. Stirring * The temperature at the time of mixing is usually set at 40 to 100.
- the temperature set during preparation is less than 40 ⁇ , the viscosity will be too high to make uniform stirring and mixing work difficult.On the other hand, if the temperature during preparation exceeds 100, the curing reaction will occur, and It is not preferable because a cast resin composition for electrical insulation cannot be obtained.
- a single- or multi-screw extruder equipped with a decompression device or a general-purpose kneader can be used.
- the prepared epoxy resin composition for electrical insulation is poured into a predetermined mold, and is heated and cured under predetermined conditions to be molded into a cured product of the present invention (5) having a desired shape. You.
- the cast epoxy resin composition for electrical insulation of the present invention (5) may have a temperature of 100 to 200: preferably 100 to L; : At I 80, the curing time can be 30 to 600 minutes, preferably 45 to 540 minutes, more preferably 60 to 480 minutes. When the curing temperature and the curing time are lower than the lower limit of the above range, the curing becomes insufficient. On the other hand, when the curing temperature and the curing time are higher than the upper limit of the above range, the resin component may be decomposed.
- the curing conditions depend on various conditions, but when the curing temperature is high, the curing time is short, and when the curing temperature is low, the curing time is long, and can be appropriately adjusted.
- a cycloaliphatic olefin compound represented by the above general formula (II), bicyclohexyl-3,3′-gen (406 g) and ethyl acetate (121 7 g) were charged into a reactor, and nitrogen was blown into the gas phase. While controlling the temperature in the reaction system to 37.5, 457 g of a 30 wt% peracetic acid solution in ethyl acetate (water content: 0.41 wt%) was added dropwise over about 3 hours. After the addition of the peracetic acid solution, the reaction was aged at 40 for 1 hour to complete the reaction. Further, the crude liquid at the end of the reaction was washed with water at 30 and the low boiling compounds were removed at 70 "CZ 20 mmHg to obtain 415 g of an epoxy compound. The yield at this time was 85%.
- the oxysilane oxygen concentration of the obtained epoxy compound was 14.7% by weight (theoretical value: 16.5% by weight).
- FIG. 1 shows an NMR chart of the obtained alicyclic epoxy compound.
- Example 2 A cycloaliphatic olefin compound represented by the general formula (II), bicyclohexyl-3,3′-gen (243 g) and ethyl acetate (730 g) were charged, and nitrogen was blown into the gas phase. While controlling the temperature in the system at 37.5, 274 g of a 30% by weight peracetic acid solution in ethyl acetate (water content: 0.41% by weight) was added dropwise over about 3 hours. After the completion of the dropwise addition of the peracetic acid solution, the mixture was aged at 40 for 1 hour to complete the reaction. Further, at 30, the crude liquid at the end of the reaction was washed with water, and at 70, low boiling compounds were removed at 20 mmHg to obtain 270 g of an epoxy compound. At this time, the yield was 93%.
- the oxysilane oxygen concentration of the obtained epoxy compound was 15.3% by weight.
- a cycloaliphatic olefin compound represented by the general formula (II) 25 g of bicyclohexyl-3,3-gen and 20 g of ethyl acetate was charged, and nitrogen was blown into the gas phase, and the reaction was continued. While controlling the temperature in the system to 60, 36 g of 30% by weight aqueous hydrogen peroxide was dropped over about 1 hour. After the completion of the dropwise addition of the hydrogen peroxide solution, the mixture was aged at 60 for 12 hours to complete the reaction.
- a cycloaliphatic olefin compound represented by the general formula (II), 25 g of bicyclohexyl-3,3′-diene, 135 g of benzene, and 0.07 g of molybdenum pentachloride as a catalyst were charged. While maintaining the temperature inside the reaction system at 80 while blowing into the reactor, 30% by weight t-butyl hydroperoxide over about 1 hour. 120 g of a benzene solution of side was added dropwise. After the completion of the dropwise addition of the benzene solution of t-butyl hydroperoxide, the mixture was aged for 3 hours with 8 O: to terminate the reaction. Further, the crude liquid at the end of the reaction was washed with water at 30 and low boiling compounds were removed at 70: / 20 mmHg to obtain 25.3 g of an epoxy compound. At this time, the yield was 84.6%.
- the oxysilane oxygen concentration of the obtained epoxy compound was 12.6% by weight.
- the alicyclic compound represented by the general formula (I) can be obtained inexpensively and in good yield from the alicyclic olefin compound represented by the general formula (II).
- Formula diepoxy compounds can be produced in high purity.
- component (A) 100 parts by weight of the alicyclic diepoxy compound obtained in Example 1 was used.
- component (B) “San Aid SI _60 L” (manufactured by Sanshin Chemical Co., Ltd.) (sulfonium salt-based photocationic polymerization initiator) 0
- the viscosity of the composition containing 6 parts by weight was measured using a Tokyo Keiki E-type rotational viscometer at 25 and found to be 5 OmPa ⁇ s.
- the above resin composition is heated at a rate of 10 per minute from 40 to 250 at a rate of 10 per minute using a TG / DTA apparatus in an air atmosphere of 200 m / min.
- the temperature at which the material decomposed and showed a weight loss was measured.
- the weight loss at 100 was less than 0.5% and the temperature at which the 5% weight loss compared to the original weight was 21.08.
- the above resin composition was heated at a rate of 10 / min from 40 to 250 in an air atmosphere of 20 Omin / min using a TGZDTA apparatus at a rate of 10 / min.
- the temperature at which the material decomposed degraded was measured.
- the weight loss at 100 was less than 0.5%, and the temperature which showed a 5% weight loss compared to the original weight was 233.4 :.
- the above resin composition was heated at a rate of 10 / min from 40 ° C to 280 in an air atmosphere of 20 Omin / min using a TGZDTA apparatus at a rate of 10 / min.
- the temperature at which the cured product showed weight loss due to decomposition was measured.
- the weight loss at 100 was less than 0.5% and the temperature at which 5% weight loss compared to the original weight was 2
- the viscosity of a composition obtained by mixing 0.6 parts by weight of San-Aid S I—60 L manufactured by Sanshin Chemical Co., Ltd. with 00 parts by weight was measured at 75 using a ⁇ -type rotary viscometer manufactured by Tokyo Keiki Co., Ltd. and found to be 80 OmPa.
- the above resin composition was heated at a rate of 10 / min from 40 to 2801 in an air atmosphere of 200 ml / min using a TG / DTA apparatus and heated to volatilize the resin composition or cure the resin.
- the temperature at which the material decomposed and showed a weight loss was measured.
- the weight loss at 10 o: is less than 0.5% and the temperature at which 5% weight loss compared to the original weight is 2
- Viscosity (mPa * s.45 ° C) 90
- the viscosity of the resin composition in Example 3 was low, and it was found that workability was extremely excellent.
- the viscosity of the resin composition of Comparative Example 5 is low, the weight loss when heated is large, and the thermal decomposition temperature is as low as 96.2, which is not sufficient in terms of heat resistance.
- the resin compositions of Comparative Examples 6 and 7 have high thermal decomposition temperatures and seem to have excellent heat resistance, even when heated at 75, the viscosity is too high and sufficient in terms of moldability. It turns out that it is not.
- the component (A) 100 parts by weight of the alicyclic diepoxy compound obtained in Example 1 was mixed with 0.3 part by weight of San-Aid SI-60L (manufactured by Sanshin Chemical) as the component (B) to obtain a resin.
- the composition was used.
- the reactivity was measured using a scanning vibrating needle type curing tester S VNC (scanning VNC) manufactured by RAPRA.
- Daicel Chemical's Celloxide 2021 P (indicated as CEL 2021P in the table) SI-100 L (Shinodi Chemical's sulfonium salt-based cationic polymerization initiator) 0.3 weight per 100 weight parts Parts were blended to obtain a resin composition.
- SI-100 L Sudicel Chemical's Celloxide 2021 P (indicated as CEL 2021P in the table)
- SI-100 L Sudicel Chemical's sulfonium salt-based cationic polymerization initiator
- 0.3 weight per 100 weight parts Parts were blended to obtain a resin composition.
- SVNC scanning VNC
- the temperature was raised in about 3 minutes up to the measurement temperature of 80, and the measurement was started when the temperature reached 80.
- the resonance frequency at the beginning of the measurement was about 66 Hz, but the point at which the resonance frequency changed to about 10 OHz with the curing of the resin composition was recorded.
- the result was 50 minutes and 49 seconds.
- Example 4 The composition of each component and the results obtained in Example 4 and Comparative Example 8 are shown in Table 2 below.
- Example 4 the reactivity of the resin composition in Example 4 is more than twice as high as that in Comparative Example 8.
- ком ⁇ онент (II) 0.6 parts by weight of San-Aid SI-60L (manufactured by Sanshin Chemical Co., Ltd.) was distributed as the component (II) with respect to 100 parts by weight of the alicyclic diepoxy compound obtained in Example 1. By combining the two, a resin composition was obtained. The viscosity of the composition was measured at 25 using an E-type rotational viscometer manufactured by Tokyo Keiki Co., Ltd. and found to be 50 mPa ⁇ s.
- Approximately 10 g of the resin composition is poured into an aluminum container having a diameter of 54 mm and a depth of 15 mm, and is subjected to primary curing (at a curing temperature of 35 and a curing time of 5 hours), followed by secondary curing (at a curing temperature of 150: Curing time: 1 hour) to obtain a colorless and transparent cured resin.
- the coefficient of linear expansion of the cured resin was measured according to JIS K 7197, and the point at which the displacement of the coefficient of linear expansion was observed was extrapolated to the glass transition temperature.
- the glass transition temperature of two samples cut from the same casting was measured in the range of 40 to 400, but no change in linear expansion was observed. The glass transition temperature was very high and could be confirmed. I could not do it.
- component (I) 100 parts by weight of the alicyclic diepoxy compound obtained in Example 1 was used.
- component (C) methylhexahydrophthalic anhydride (Nippon Rika Chemical Co., Ltd., ⁇ -700) was used as component.
- One part by weight, 1 part by weight of ethylene glycol as an initiator, and 0.5 part by weight of DBU (1,8-diazabicyclo (5,4,0) indene) as a curing accelerator were blended to prepare a resin composition.
- the viscosity of the composition was measured at 25 °: using a ⁇ -type rotational viscometer manufactured by Tokyo Keiki Co., Ltd. and found to be 6 OmPa ⁇ s.
- the coefficient of linear expansion of the cured resin was measured according to JISK 7197, and the point at which the change in coefficient of linear expansion was observed was extrapolated to the glass transition temperature.
- the glass transition temperature was measured in the range of 40 to 400 ° C for two samples cut from the same casting. Of course, it was 120.4.
- the temperature of the cured resin is increased by using a TGZDTA device at a rate of 10 per minute from 40 to 400 in an air atmosphere of 200 ml / min. It was measured.
- the temperature that showed a 3% weight loss compared to the original weight was 197.9, and the temperature that showed a 5% weight loss was 231.7.
- the viscosity of the composition was measured at 25 using an E-type rotary viscometer manufactured by Tokyo Keiki Co., Ltd. and found to be 60 mPa's.
- Approximately 10 g of the resin composition is poured into an aluminum container having a diameter of 54 mm and a depth of 15 mm, and is subjected to primary curing (curing temperature: 11 O :, curing time: 2 hours), and then to secondary curing ( Curing temperature 18 Ot, curing time 1 hour) to obtain a colorless and transparent cured resin.
- the coefficient of linear expansion of the cured resin was measured according to JIS K 7197, and the point at which the change in coefficient of linear expansion was observed was extrapolated to the glass transition temperature.
- the glass transition temperature of two samples cut from the same casting was measured between 40 and 400 and found to be 121.0.
- the temperature of the cured resin is increased from 40 to 40 at a rate of 10 per minute in an air atmosphere of 200 ml / min using a TGZDTA device, and the temperature at which the cured resin decomposes and loses weight by heating is measured. did.
- the temperature that showed a 3% weight loss compared to the original weight was 223.0 ° C, and the temperature that showed a 5% weight loss was 253.9.
- component (A) 100 parts by weight of the alicyclic diepoxy compound obtained in Example 1
- component (C) RIKACID MH-700 manufactured by Shin Nippon Rika 139.
- ethylene glycol as an initiator and 0.5 part by weight of DBU (1,8-diazapicyclo (5,4,0) indene) were blended to obtain a resin composition.
- the viscosity of the composition was measured at 25 using an E-type rotational viscometer manufactured by Tokyo Keiki Co., Ltd. and found to be 6 OmPa ⁇ s.
- About 10 g of the resin composition is poured into an aluminum container having a diameter of 54 mm and a depth of 15 mm, and is subjected to primary curing (curing temperature of 120, curing time of 1 hour), followed by secondary curing (curing temperature of 180) The curing time was 2 hours) to obtain a colorless and transparent cured resin.
- the coefficient of linear expansion of the cured resin was measured according to JIS K 7197, and the point at which the change in coefficient of linear expansion was observed was extrapolated to the glass transition temperature.
- the glass transition temperature of the two samples cut from the same casting in the range from 40 ⁇ to 400 was 205.4.
- the temperature of the cured resin was increased from 40 to 400 at a rate of 10 per minute in an air atmosphere of 200 ml / min using a TGZDTA device, and the temperature at which the cured resin was decomposed by heating and showed a decrease in weight was measured. .
- the temperature that showed a 3% weight loss compared to the original weight was 233.6, and the temperature that showed a 5% weight loss was 270.8.
- the coefficient of linear expansion of the cured resin was measured according to JISK 7197, and the point at which the change in coefficient of linear expansion was observed was extrapolated to the glass transition temperature.
- the glass transition temperature was measured in the range of 40 to 400 for two samples cut from the same casting. It was 15.9.8.
- the temperature of the cured resin is increased from 40 ° C to 400 at a rate of 10 / min in a 200 ml / min air atmosphere using a TGZDTA device, and the cured resin is decomposed and weighed by heating. The temperature indicating the decrease was measured.
- the temperature that showed a 3% weight loss compared to the original weight was 21.7. 5 and the temperature that showed a 5% weight loss was 25.7.
- Approximately 10 g of the resin composition is poured into an aluminum container having a diameter of 54 mm and a depth of 15 mm and subjected to primary curing (curing temperature of 120, curing time of 1 hour), followed by secondary curing (curing temperature) At 180, the curing time was 2 hours) to obtain a cured colorless and transparent resin.
- the coefficient of linear expansion of the cured resin was measured according to JIS K 197, and the point at which the change in coefficient of linear expansion was observed was extrapolated to the glass transition temperature.
- the glass transition temperature of two samples cut from the same casting was measured in the range of 40 to 400 and found to be 221.5.
- the temperature of the cured resin is increased from 40 to 400 at a rate of 10 / min in a 200 ml / min air atmosphere using a TGZDTA device.
- the cured resin is decomposed by heating and loses weight. was measured.
- the temperature that showed a 3% weight loss compared to the original weight was 294.9, and the temperature that showed a 5% weight loss was 304.8 ⁇ .
- Table 3 shows the composition of each component and the results obtained in Examples 5 to 8 and Comparative Examples 9 to 10.
- the glass transition point of the cured product in Example 5 is so high that it cannot be measured, and is superior to that of Comparative Example 9 performed under similar conditions. Further, the viscosities of the compositions in Examples 5 to 8 were all lower than those in Comparative Examples 9 and 10, confirming that the compositions were easy to handle. Since the alicyclic diepoxy compound represented by the formula (I), which is an essential resin component (A) in the curable epoxy resin composition of the present invention (2), has no ester group in the molecule, it can be used as a cationic catalyst. It exhibits high reactivity with the composition, and has the effect of lowering the curing temperature conventionally required for curing the composition or shortening the curing time.
- the formula (I) which is an essential resin component (A) in the curable epoxy resin composition of the present invention (2)
- the curable epoxy resin composition of the present invention (2) comprising an alicyclic diepoxy compound which is easy to handle with low viscosity as an essential component has high reactivity to various curing agents, low viscosity and excellent workability. It is also excellent in that it has little effect on the working environment.
- the cured product obtained by curing this curable epoxy resin composition is very different in terms of transparency, heat resistance, etc. from the cured product obtained by curing using a conventional epoxy resin. Shows good performance. In addition, the cured product exhibits useful properties in various fields, including applications such as coatings, inks, adhesives, sealants, and encapsulants.
- Examples and Comparative Examples for Invention (3) Here, each component was blended and kneaded to prepare a molding material, and the spiral flow, curing torque, and water absorption were measured to evaluate its properties.
- the measuring method and conditions for each characteristic were as follows.
- the molding material immediately after preparation was measured using a mold for spiral flow measurement according to EMM I-I-166, at a mold temperature of 175 ° C, an injection pressure of 70 kgf / cm 2 , and a curing time of 2 minutes.
- Spiral flow (cm) is a parameter of fluidity. A larger value means better fluidity.
- the torque after heating at 175 ° C for 45 seconds was measured using Curastome Ichiichi (Orientec Co., Ltd., JSR Curastome Ichiichi PS model).
- the torque value (kg f ⁇ cm) by the curast meter is a parameter of the curability, and the larger the value, the higher the curability.
- a transfer molding machine at a mold temperature of 175, an injection pressure of 75 kgZc m, and a curing time of 2 minutes, a disk with a diameter of 50 mm and a thickness of 3 mm is molded and post-cured at 1 75 ° C for 8 hours. After that, it was immersed in distilled water at 23 ° C for 24 hours, the change in weight was measured, and the water absorption (% by weight) was determined.
- each component was mixed, kneaded at 95 ° C. for 8 minutes using a hot roll, cooled, and pulverized to obtain a resin composition.
- the evaluation results were as shown in Table 4.
- the compounding composition is as follows: (a) as the component, 5 parts by weight of the alicyclic diepoxy compound obtained in Example 1, and as necessary, (e) a resin mainly composed of a biphenyl type epoxy resin as the component [ Nippon Kayaku Co., Ltd. Cresol novolac epoxy resin EOCN-1020, Epoxy equivalent 185, Melting point 105 ° C] 95 parts by weight, (b) As a component, a phenol resin [Phenol resin manufactured by Sumitomo Belite Co., Ltd.
- a molding material was prepared in the same manner as in Example 9 using each composition shown in Table 4. The evaluation results are summarized in Table 4.
- Molding materials were prepared in the same manner as in Example 9 using the respective formulations shown in Table 4 (continued), and each was evaluated. The evaluation results are summarized in Table 4 (continued).
- EOCN-1020 Creso-novolak-type epoxy resin manufactured by Nippon Kayaku Co., Ltd.
- PR-53195 Phenol resin manufactured by Sumitomo Beil-Cryte
- the cured products in Examples 10 to 13 obtained using the epoxy resin composition for electronic component sealing of the present invention (3) are the same as the cured products in Comparative Examples 11 to 12. It shows a low water absorption value as compared with that, which indicates that the epoxy resin composition for sealing electronic parts is extremely excellent.
- the epoxy resin composition for electronic component sealing of the present invention (3) using the alicyclic diepoxy compound (a) represented by the general formula (I) It can be seen that the fluidity, that is, the moldability is excellent.
- Sample 1 (oil 1 based on the formulation in Table 5): polypropylene glycol diacetate (kinematic viscosity at MW of 3000, 100 is 9.8 cSt)
- compositions shown in Table 7 were placed in an autoclave made of S US-316 and heated in air at 150 at 10 days. After the heating test, the kinematic viscosity (unit: cSt) and the acid value (mgKOH / g) were evaluated.
- the oxidation stability was measured according to JIS C2101-93.
- Example 14 1 Epoxy 3 acetic acid 3
- Example 15 2
- Example 1 Epoxy 3 hexanoic acid 3
- Example 1 Epoxy organic acid Organic acid addition Amount of oil added (wt%) 16
- Epoxy of Example 2 3
- Hexanoic acid 5 Comparative example 13
- Epoxidized soybean oil 3 Acetic acid 3
- Comparative example 14 Epoxidized soybean oil 3 Hexanoic acid 3 Comparative example 15 2 Phenyldaricidyl 3 Hexanoic acid 3
- Comparative Example 15 used phenyldaricidyl ether.
- Celloxide 2021 in Comparative Example 17 is 3,4-epoxycyclohexylmethyl (3,4-epoxycyclohexanecarboxylate) manufactured by Daicel Chemical Industries, Ltd.
- Example 15 1 .06 0.32 0 .1 0 0 .02
- Example 16 1 .22 0 .50 0 .2 1 0 .05
- Celloxide 2021 in Comparative Example 21 is 3,4-epoxycyclohexylmethyl (3,4-epoxycyclohexanecarboxylate) manufactured by Daicel Chemical Industries, Ltd.
- the stabilizer for insulating oil of the present invention (4) that is, the alicyclic diepoxy compound represented by the general formula (I) and the electric insulating oil to which it was added, were added. In this case, the acid value is low and the properties of insulating oil are improved.
- the alicyclic diepoxy compound obtained in Example 1 was used as the alicyclic diepoxy compound (a-1), and the following epoxy resins 2 to 4 were used as the epoxy compound (a-2).
- Epoxy resin 2 CEL-2021 P (3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate, manufactured by Daicel Chemical Industries)
- Epoxy resin 3 YD-128 (manufactured by Toto Kasei, bisphenol A type epoxy resin, epoxy equivalent 190, viscosity 1360 OmPa ⁇ sZ25 :)
- Epoxy resin 4 HBE-100 (manufactured by Shin Nippon Rika, hydrogenated bisphenol A diglycidyl ether type epoxy resin, epoxy equivalent 210, viscosity 221 OmPa ⁇ sZ25) [Acid anhydride 1] Methylhexahydrofuranic anhydride (Product name RIKACID MH-700: manufactured by Shin Nippon Rika Co., Ltd.)
- Tables 8 to 9 The components shown in Tables 8 to 9 below were blended in the proportions shown in the same table, and at a temperature of about 25 under reduced pressure (3 to 5 rr), a product made by THINKY, Awatori Rentaro AR-100 To obtain an insulating cast epoxy resin composition. Then, the above-mentioned insulating cast epoxy resin composition was molded and cured by a casting method to produce a molded article having a predetermined shape. In Tables 8 to 9, the amounts of the components are all parts by weight. Table 8
- a sample having a thickness of lmmx 6 Omm in diameter was prepared, in which the main electrode and its surrounding guard electrode were formed on one side and the counter electrode was formed on the other side using conductive paint. Then, the sample was placed in a thermostat at 100.
- the capacitance and conductance (measurement frequency: 50 Hz) were measured by the transformer bridge method, and the dielectric loss tangent (t an ⁇ ) and dielectric constant ( ⁇ ) was calculated by the following equation.
- Dielectric constant ( ⁇ ) Cx / Co Cx: capacitance value when the bridge is balanced (pF)
- Samples with a width of 1 Omm, a length of 100 mm and a thickness of 4 mm were prepared, a load was applied to the center by a pressure wedge with both ends supported at a distance of 64 mm, and the maximum load when bending and breaking was determined.
- the alicyclic diepoxy compound represented by the above general formula (I) can be produced at high purity at low cost and with good yield.
- the cured product obtained by curing the curable epoxy resin composition comprising the alicyclic epoxy compound and the curing agent and the like is compared with the cured product obtained by curing using a conventional epoxy resin. It shows very good performance in terms of transparency and heat resistance, and its cured product is used for coatings, inks, adhesives, sealants, and sealants.
- the curable epoxy resin composition is also useful as a cast epoxy resin composition for electrical insulation and an epoxy resin composition for sealing electronic components.
- the alicyclic diepoxy compound is also useful as a stabilizer for electric insulating oil.
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Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP12007091.7A EP2546275B1 (en) | 2002-09-05 | 2003-09-04 | Curable epoxy resin compositions, epoxy resin compositions for the encapsulation of electronic parts, stabilizers for electrical insulating oils, and casting epoxy resin compositions for electrical insulation. |
US10/526,672 US20060009547A1 (en) | 2002-09-05 | 2003-09-04 | Process for preparation of alicyclic diepoxy compound, curable epoxy resin compositions, epoxy resin compositions for the encapsulation of electronic components, stabilizers for electrical insulating oils, and casting epoxy resin compositions for electrical insulation |
EP03808875A EP1541567A4 (en) | 2002-09-05 | 2003-09-04 | PROCESS FOR THE PREPARATION OF DIEPOXY ALICYCLIC COMPOUNDS, CURABLE EPOXY RESIN COMPOSITIONS, EPOXY RESIN COMPOSITIONS FOR ENCAPSULATION OF ELECTRONIC COMPONENTS, STABILIZERS FOR ELECTRICALLY INSULATING OILS, AND EPOXY RESIN COMPOSITIONS FOR ELECTRO ISOLATION |
US12/314,222 US7781543B2 (en) | 2002-09-05 | 2008-12-05 | Curable alicyclic diepoxy resin composition |
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JP2002260490A JP2004099467A (ja) | 2002-09-05 | 2002-09-05 | 脂環式エポキシ化合物の製造方法 |
JP2002-260490 | 2002-09-05 | ||
JP2002362684 | 2002-12-13 | ||
JP2002-362684 | 2002-12-13 | ||
JP2002375662A JP2004204082A (ja) | 2002-12-25 | 2002-12-25 | 電子部品封止用エポキシ樹脂組成物およびその硬化物 |
JP2002-375662 | 2002-12-25 | ||
JP2003139484A JP4322047B2 (ja) | 2003-05-16 | 2003-05-16 | 電気絶縁用注型エポキシ樹脂組成物及び硬化物 |
JP2003-139484 | 2003-05-16 | ||
JP2003171176A JP4428943B2 (ja) | 2003-06-16 | 2003-06-16 | 電気絶縁油用安定剤および電気絶縁油 |
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WO2006038605A1 (ja) * | 2004-10-04 | 2006-04-13 | Toagosei Co., Ltd. | シクロヘキシル基または長鎖アルキル基を有するシクロヘキセンオキサイド化合物とその用途 |
WO2006054461A1 (ja) * | 2004-11-18 | 2006-05-26 | Konica Minolta Medical & Graphic, Inc. | 活性光線硬化組成物、インク活性光線硬化型インク及び画像形成方法 |
WO2008004504A1 (fr) * | 2006-07-06 | 2008-01-10 | Daicel Chemical Industries, Ltd. | Composé diépoxy alicyclique, composition de résine époxyde et produit durci |
JP2008214448A (ja) * | 2007-03-02 | 2008-09-18 | Daicel Chem Ind Ltd | 繊維強化複合材料用エポキシ樹脂組成物及び繊維強化複合材料 |
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WO2014083844A1 (ja) * | 2012-11-28 | 2014-06-05 | 日本化薬株式会社 | 樹脂組成物及びその硬化物(2) |
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JP4426324B2 (ja) * | 2004-01-21 | 2010-03-03 | ダイセル化学工業株式会社 | 非エステル型エポキシ樹脂および樹脂組成物 |
JP5037348B2 (ja) * | 2005-09-02 | 2012-09-26 | 新日鐵化学株式会社 | エポキシ樹脂組成物 |
AU2006316667B2 (en) * | 2005-11-22 | 2012-08-02 | Huntsman Advanced Materials Licensing (Switzerland) Gmbh | Weather-resistant epoxy resin system |
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JPWO2006054461A1 (ja) * | 2004-11-18 | 2008-05-29 | コニカミノルタエムジー株式会社 | 活性光線硬化組成物、インク活性光線硬化型インク及び画像形成方法 |
US7989523B2 (en) | 2006-06-07 | 2011-08-02 | Daicel Chemical Industries, Ltd. | Alicyclic diepoxy compound, epoxy resin composition comprising the same, and cured article therefrom |
JP2008031424A (ja) * | 2006-07-06 | 2008-02-14 | Daicel Chem Ind Ltd | 脂環式ジエポキシ化合物、エポキシ樹脂組成物及び硬化物 |
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CN103788059A (zh) * | 2008-10-06 | 2014-05-14 | 日本化药株式会社 | 二烯化合物、环氧树脂、可固化树脂组合物及固化物 |
WO2014083844A1 (ja) * | 2012-11-28 | 2014-06-05 | 日本化薬株式会社 | 樹脂組成物及びその硬化物(2) |
JP2016115779A (ja) * | 2014-12-13 | 2016-06-23 | 株式会社ダイセル | ナノインプリント用光硬化性組成物 |
Also Published As
Publication number | Publication date |
---|---|
TWI312800B (en) | 2009-08-01 |
US20060009547A1 (en) | 2006-01-12 |
US7781543B2 (en) | 2010-08-24 |
KR101005948B1 (ko) | 2011-01-05 |
KR20050042173A (ko) | 2005-05-04 |
US20090131547A1 (en) | 2009-05-21 |
EP2546275A3 (en) | 2013-05-22 |
EP2546275B1 (en) | 2023-09-20 |
EP1541567A4 (en) | 2010-11-17 |
EP1541567A1 (en) | 2005-06-15 |
EP2546275A2 (en) | 2013-01-16 |
TW200404871A (en) | 2004-04-01 |
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