WO2023013712A1 - 硬化性組成物、プリプレグ、金属箔張積層板、及びプリント配線板 - Google Patents
硬化性組成物、プリプレグ、金属箔張積層板、及びプリント配線板 Download PDFInfo
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- WO2023013712A1 WO2023013712A1 PCT/JP2022/029872 JP2022029872W WO2023013712A1 WO 2023013712 A1 WO2023013712 A1 WO 2023013712A1 JP 2022029872 W JP2022029872 W JP 2022029872W WO 2023013712 A1 WO2023013712 A1 WO 2023013712A1
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- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 description 1
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 150000003752 zinc compounds Chemical class 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- BNEMLSQAJOPTGK-UHFFFAOYSA-N zinc;dioxido(oxo)tin Chemical compound [Zn+2].[O-][Sn]([O-])=O BNEMLSQAJOPTGK-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/092—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising epoxy resins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- 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
-
- 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
- C08G59/226—Mixtures of di-epoxy compounds
-
- 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
- C08G59/30—Di-epoxy compounds containing atoms other than carbon, hydrogen, oxygen and nitrogen
- C08G59/306—Di-epoxy compounds containing atoms other than carbon, hydrogen, oxygen and nitrogen containing silicon
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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
- C08G59/40—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 curing agents used
- C08G59/4007—Curing agents not provided for by the groups C08G59/42 - C08G59/66
- C08G59/4014—Nitrogen containing compounds
- C08G59/4028—Isocyanates; Thioisocyanates
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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
- C08G59/40—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 curing agents used
- C08G59/4007—Curing agents not provided for by the groups C08G59/42 - C08G59/66
- C08G59/4014—Nitrogen containing compounds
- C08G59/4042—Imines; Imides
-
- 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
- C08G59/40—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 curing agents used
- C08G59/62—Alcohols or phenols
- C08G59/621—Phenols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
- C08L61/14—Modified phenol-aldehyde condensates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/08—PCBs, i.e. printed circuit boards
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
Definitions
- the present invention relates to a curable composition, a prepreg, a metal foil-clad laminate, and a printed wiring board.
- thermosetting composition containing a specific maleimide compound, a silicone compound having an epoxy group in the molecular structure, and a compound having a phenolic hydroxyl group is excellent in heat resistance and low thermal expansion, It is disclosed that it is suitably used for metal foil-clad laminates and multilayer printed wiring boards.
- Patent Document 2 polymaleimide, a diglycidylpolysiloxane represented by the following formula (I), and an addition polymer of a diallyl bisphenol represented by the following formula (II), and the following formula (III)
- a manufacturing method is disclosed in which a resin for encapsulating a semiconductor is obtained by reacting an allylated phenol resin represented by the formula in a predetermined ratio and under predetermined conditions.
- the resin for semiconductor encapsulation obtained by the above production method has good compatibility with polymaleimide and the addition polymer described above, and furthermore, the composition using the resin for semiconductor encapsulation has good compatibility.
- component b in the following formula (III) is an important component that reacts with maleimide groups in a resin formation reaction with polymaleimide and improves the compatibility between polymaleimide and polysiloxane. ing.
- R 1 represents an alkylene group or a phenylene group
- each R 2 independently represents an alkyl group or a phenyl group
- n represents an integer of 1-100.
- R4 represents an ether bond, a methylene group, a propylidene group, or a direct bond (single bond).
- Patent Document 3 discloses a thermosetting composition containing an alkenylphenol (A), an epoxy-modified silicone (B), and an epoxy compound (C) other than the epoxy-modified silicone (B), which has excellent compatibility.
- the resin composition described in Patent Document 1 has a problem that the metal foil peel strength (for example, copper foil peel strength) when forming a metal foil-clad laminate is not sufficient, although it has heat resistance. have.
- the metal foil peel strength for example, copper foil peel strength
- Patent Document 3 Although the resin composition described in Patent Document 3 is excellent in metal foil peel strength, there is room for improvement in terms of low thermal expansion.
- the present invention has been made in view of the above problems, and provides a curable composition that simultaneously achieves low thermal expansion, heat resistance (high glass transition temperature), and high peel strength (copper foil adhesion), a prepreg,
- An object of the present invention is to provide a metal foil-clad laminate and a printed wiring board.
- the present invention is as follows. [1] At least a structural unit derived from an alkenylphenol (A), a structural unit derived from an epoxy-modified silicone (B), and a structural unit derived from an epoxy compound (C) other than the epoxy-modified silicone (B) A thermosetting compound (D) containing, an epoxy resin (E), and a cyanate ester compound (F), wherein the epoxy resin (E) is different from the epoxy-modified silicone (B), and , which may be the same as or different from the epoxy compound (C), and the functional group equivalent ratio between the cyanate ester compound (F) and the epoxy resin (E) (of the cyanate ester compound (F) A curable composition in which the equivalent weight of cyanate groups/the equivalent weight of epoxy groups of the epoxy resin (E)) is from 0.25 to 0.85.
- thermosetting compound (D) contains at least the alkenylphenol (A), the epoxy-modified silicone (B), and the epoxy compound (C) other than the epoxy-modified silicone (B).
- each R 1 independently represents a single bond, an alkylene group, an aryl group, or an aralkylene group; each R 2 independently represents an alkyl group having 1 to 10 carbon atoms or a phenyl group; and n is an integer from 0 to 100).
- each R a independently represents an alkyl group having 1 to 10 carbon atoms or a hydrogen atom.
- thermosetting compound (D) has a weight average molecular weight of 3.0 ⁇ 10 3 to 5.0 ⁇ 10 4 .
- epoxy resin (E) according to any one of [1] to [7], wherein the epoxy resin (E) contains at least one selected from the group consisting of naphthalene cresol novolak type epoxy resins and naphthylene ether type epoxy resins. Curable composition.
- the cyanate ester compound (F) contains a compound represented by the following formula (5) excluding the compound represented by the following formula (4) and/or the compound represented by the following formula (4) , the curable composition according to any one of [1] to [8].
- each R 6 independently represents a hydrogen atom or a methyl group, and n 2 represents an integer of 1 or more.
- R ya each independently represents an alkenyl group having 2 to 8 carbon atoms or a hydrogen atom
- R yb each independently represents an alkyl group having 1 to 10 carbon atoms, or represents a hydrogen atom
- each R yc independently represents an aromatic ring having 4 to 12 carbon atoms
- R yc may form a condensed structure with a benzene ring
- R yc may be present
- a 1a each independently represents an alkylene group having 1 to 6 carbon atoms, an aralkylene group having 7 to 16 carbon atoms, an arylene group having 6 to 10 carbon atoms, a fluorenylidene group, and a sulfonyl group.
- one benzene ring may have two or more R ya and/or R yb groups, and n is 1 represents an integer from ⁇ 20).
- thermosetting compound (D) The content of the thermosetting compound (D) is based on a total of 100 parts by mass of the thermosetting compound (D), the epoxy resin (E), and the cyanate ester compound (F) and 25 to 50 parts by mass, the curable composition according to any one of [1] to [9].
- the total content of the epoxy resin (E) and the cyanate ester compound (F) is such that the thermosetting compound (D), the epoxy resin (E), and the cyanate ester compound (The curable composition according to any one of [1] to [10], which is 50 to 75 parts by mass with respect to 100 parts by mass in total with F).
- thermosetting compound (D) The content of the thermosetting compound (D) is 25 parts with respect to a total of 100 parts by mass of the thermosetting compound (D), the epoxy resin (E), and the cyanate ester compound (F). to 50 parts by mass, and the total content of the epoxy resin (E) and the cyanate ester compound (F) is equal to the thermosetting compound (D), the epoxy resin (E), and the cyanide
- thermosetting compound (D), the epoxy resin (E), and the cyanate ester compound (F) is 50 per 100 parts by mass of the resin solid content in the resin composition. 99 parts by mass, the curable composition according to any one of [1] to [12].
- the maleimide compound is bis(4-maleimidophenyl)methane, 2,2-bis(4-(4-maleimidophenoxy)-phenyl)propane, bis(3-ethyl-5-methyl-4-maleimidophenyl )
- the curable composition according to [14] which contains at least one selected from the group consisting of methane, a maleimide compound represented by the following formula (3), and a maleimide compound represented by the following formula (3′) thing.
- each R 5 independently represents a hydrogen atom or a methyl group, and n 1 represents an integer of 1 to 100.
- each R 13 independently represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or a phenyl group, and n 4 represents an integer of 1 to 10.).
- the content of the maleimide compound is 5 to 45 with respect to a total of 100 parts by mass of the thermosetting compound (D), the epoxy resin (E), and the cyanate ester compound (F).
- the content of the inorganic filler is 50 to 50 parts by mass with respect to a total of 100 parts by mass of the thermosetting compound (D), the epoxy resin (E), and the cyanate ester compound (F).
- the curable composition according to [17] which is 350 parts by mass.
- the inorganic filler is at least one selected from the group consisting of silica, aluminum hydroxide, alumina, boehmite, boron nitride, aluminum nitride, titanium oxide, barium titanate, magnesium oxide, and magnesium hydroxide.
- a prepreg comprising a substrate and the curable composition according to any one of [1] to [19] impregnated or applied to the substrate.
- a metal foil-clad laminate comprising a laminate formed using the prepreg described in [20] and a metal foil disposed on one side or both sides of the laminate.
- a curable composition, a prepreg, a metal foil-clad laminate, and a printed wiring board that can simultaneously achieve low thermal expansion, heat resistance (high glass transition temperature), and high peel strength (copper foil adhesion).
- this embodiment the form for carrying out the present invention (hereinafter referred to as "this embodiment") will be described in detail.
- the following embodiments are examples for explaining the present invention, and are not intended to limit the present invention to the following contents.
- the present invention can be appropriately modified and implemented within the scope of the gist thereof.
- (Meth)acrylate in this specification means both “acrylate” and its corresponding “methacrylate”.
- the term "resin solid content” or “resin solid content in the resin composition” refers to inorganic fillers, silane coupling agents, wetting and dispersing agents, etc. in the resin composition.
- Additives, and components excluding solvents, "100 parts by mass of resin solid content” refers to additives such as inorganic fillers, silane coupling agents and wetting and dispersing agents in the resin composition, and excluding solvents 100 parts by mass of the components.
- the curable composition of the present embodiment comprises at least a structural unit derived from alkenylphenol (A), a structural unit derived from epoxy-modified silicone (B), and an epoxy compound (C) other than the epoxy-modified silicone (B). ), an epoxy resin (E), and a cyanate ester compound (F), wherein the epoxy resin (E) is the epoxy-modified silicone Different from (B) and may be the same as or different from the epoxy compound (C), the functional group equivalent ratio between the cyanate ester compound (F) and the epoxy resin (E) (( The cyanate group equivalent weight of the cyanate ester compound (F)/epoxy group equivalent weight of the epoxy resin (E)) is from 0.25 to 0.85.
- thermosetting compound (D) contains a structural unit derived from the epoxy-modified silicone (B) and a structural unit derived from an epoxy compound (C) other than the epoxy-modified silicone (B). Then, the thermosetting compound (D) is incompatible with the epoxy resin (E) and the cyanate ester compound (F) during heat curing, forming a so-called reaction-induced phase separation structure. At this time, if the thermosetting compound (D) further contains a structural unit derived from alkenylphenol (A), it will also contain a highly reactive alkenyl group. state can be controlled.
- the phase separation interface increases, that is, finer phase separation can be formed.
- a so-called shared A continuous structure can be suitably formed.
- the cured product obtained by using such a curable composition can have low thermal expansion while maintaining heat resistance (high glass transition temperature) and high peel strength (copper foil adhesion). It is considered to be.
- the functional group equivalent ratio between the cyanate ester compound (F) described later and the epoxy resin (E) described later (the equivalent of the cyanate group of the cyanate ester compound (F)/epoxy resin
- the equivalent weight of the epoxy group of (E) is from 0.25 to 0.85.
- the functional group equivalent ratio is preferably 0.30 to 0.80, more preferably 0.40 to 0.70, because better low thermal expansion, heat resistance, and peel strength can be obtained. more preferred.
- the functional group equivalent ratio is less than 0.25, it becomes difficult to obtain excellent heat resistance and peel strength.
- the functional group equivalent ratio exceeds 0.85, it becomes difficult to obtain low thermal expansion.
- the functional group equivalent ratio is less than 0.25, the number of unreacted epoxy residues increases, resulting in poor curing and a continuous phase (island) between the epoxy resin (E) and the cyanate ester compound (F). part) cannot be suitably formed, and as a result, it is presumed that heat resistance and peel strength (copper foil adhesion) are lowered.
- the functional group equivalent ratio exceeds 0.85, the phase separation interface becomes insufficient, so that the continuous phase (sea portion) of the thermosetting compound (D) cannot be suitably formed, resulting in low elasticity of the cured product. It is presumed that the reduction becomes insufficient and low thermal expansion cannot be achieved.
- the functional group equivalent ratio is the equivalent of the cyanate group in the cyanate ester compound (F) contained in the curable composition and the equivalent of the epoxy group in the epoxy resin (E) contained in the curable composition. and is calculated by the following formula (1).
- the number of functional groups i.e., equivalent weight of cyanate group and equivalent weight of epoxy group
- the functional group equivalent ratio is a value obtained by dividing the equivalent weight of all cyanate groups by the equivalent weight of all epoxy groups.
- the number of functional groups is a value obtained by dividing the number of parts by mass of a component by the functional group equivalent of that component.
- the curable composition of the present embodiment contains at least a structural unit derived from alkenylphenol (A), a structural unit derived from epoxy-modified silicone (B), and an epoxy compound (C) other than epoxy-modified silicone (B). and a thermosetting compound (D) containing a structural unit derived from.
- the thermosetting compound (D) may further contain structural units derived from a phenol compound (G) other than the alkenylphenol (A), if necessary.
- each structural unit is also referred to as structural unit A, B, C, and G, respectively.
- the term "structural unit derived from alkenylphenol (A)” means that the thermosetting compound (D) contains a structural unit derived from polymerization of alkenylphenol (A). In addition to, it includes structural units formed by reactions that can give similar structural units. In the present specification, "a structural unit derived from” shall be similarly interpreted.
- the reaction-induced phase separation structure described above can be more preferably controlled. is possible, the curable composition can exhibit low thermal expansion, heat resistance, and high peel strength at the same time.
- a thermosetting compound (D) can be used individually by 1 type or in combination of 2 or more types as appropriate. Alkenylphenol (A), epoxy-modified silicone (B), epoxy compound (C), and phenol compound (G) will be described later.
- the content of the structural unit A is preferably 5 to 50% by mass, more preferably 10 to 45% by mass, and 10 to 40% by mass with respect to the total mass of the thermosetting compound (D). is more preferable.
- the curable composition has more excellent compatibility in the varnish, and liquid phase separation is less likely to occur (hereinafter referred to as "varnish phase (Also referred to as "solubility").
- the cured product obtained by curing the curable composition of the present embodiment tends to be excellent in low thermal expansion, heat resistance, and peel strength.
- the content of the structural unit B is preferably 20 to 60% by mass, more preferably 25 to 55% by mass, and 30 to 50% by mass with respect to the total mass of the thermosetting compound (D). is more preferable.
- the curable composition has more excellent varnish compatibility, so that the obtained cured product tends to be excellent in low thermal expansion, heat resistance, and peel strength. It is in.
- Structural unit B is an epoxy-modified silicone having an epoxy equivalent of 50 to 350 g/mol (hereinafter also referred to as “low equivalent epoxy-modified silicone B1”) and an epoxy-modified silicone having an epoxy equivalent of 400 to 4000 g/mol (hereinafter referred to as (Also referred to as “high equivalent weight epoxy-modified silicone B2”).
- Low equivalent weight epoxy-modified silicone B1 and high equivalent weight epoxy-modified silicone B2 are respectively epoxy-modified silicone having an epoxy equivalent weight of 140 to 250 g/mol (hereinafter also referred to as “low equivalent weight epoxy-modified silicone B1′”), and 450 to More preferably, it is an epoxy-modified silicone having an epoxy equivalent of 3000 g/mol (hereinafter also referred to as “high-equivalent epoxy-modified silicone B2′”).
- structural unit B1 The content of the structural unit derived from the low-equivalent epoxy-modified silicone B1 (hereinafter also referred to as "structural unit B1") is 5 to 25% by mass with respect to the total mass of the thermosetting compound (D). It is preferably 7.5 to 20% by mass, and even more preferably 10 to 17% by mass.
- structural unit B2 The content of the structural unit derived from the high-equivalent epoxy-modified silicone B2 (hereinafter also referred to as "structural unit B2") is 15 to 55% by mass with respect to the total mass of the thermosetting compound (D). It is preferably from 20 to 52.5% by mass, and even more preferably from 25 to 50% by mass.
- the mass ratio of the content of the structural unit B2 to the content of the structural unit B1 is preferably 1.5 to 4, more preferably 1.7 to 3.5, and 1.9 to 3.1. is more preferable.
- the curable composition has more excellent varnish compatibility, so that the resulting cured product tends to be more excellent in low thermal expansion, heat resistance, and peel strength.
- the content of the structural unit C is preferably 5 to 40% by mass, preferably 10 to 30% by mass, and 15 to 20% by mass with respect to the total mass of the thermosetting compound (D). It is even more preferable to have When the content of the structural unit C is within the above range, the curable composition has more excellent varnish compatibility, so that the obtained cured product tends to be excellent in low thermal expansion, heat resistance, and peel strength. , and tends to exhibit excellent chemical resistance and insulation reliability.
- the content of the structural unit C is preferably 5 to 95% by mass, more preferably 10 to 90% by mass, relative to the total mass of the structural unit B and the structural unit C, and 15 to 60% by mass. % by mass is more preferred, and 20 to 50% by mass is particularly preferred.
- the content of the structural unit B is preferably 5 to 95% by mass, more preferably 10 to 90% by mass, and 40 to 85% by mass with respect to the total mass of the structural unit B and the structural unit C. is more preferable, and 50 to 80% by mass is particularly preferable.
- the content of the structural unit G is preferably 5 to 30% by mass, preferably 10 to 27.5% by mass, and 10 to 25% by mass relative to the total mass of the thermosetting compound (D). % is more preferred.
- the curable composition has more excellent varnish compatibility, so that the resulting cured product tends to be excellent in low thermal expansion, heat resistance, and peel strength. It is in.
- the alkenyl group equivalent of the thermosetting compound (D) is preferably 300-1500 g/mol, more preferably 350-1200 g/mol, and even more preferably 400-1000 g/mol.
- a continuous phase of the thermosetting compound (D) can be suitably formed. Therefore, the cured product obtained by curing the curable composition of the present embodiment has an elastic modulus As a result, the low thermal expansion properties of substrates and the like obtained using the cured product tend to be further reduced.
- the alkenyl group equivalent is 1500 g/mol or less, the reaction-induced phase separation structure can be controlled more appropriately, so that the resulting cured product has low thermal expansion, heat resistance, and excellent peel strength. There is a tendency to further improve chemical resistance and insulation reliability.
- the weight-average molecular weight (Mw) of the thermosetting compound (D) is preferably 3.0 ⁇ 10 3 to 5.0 ⁇ 10 4 , more preferably 3.0 ⁇ 10 3 to 2, in terms of polystyrene in the GPC method. 0 ⁇ 10 4 is more preferred.
- the weight average molecular weight is 3.0 ⁇ 10 3 or more, the coefficient of thermal expansion of the prepreg tends to decrease.
- the weight-average molecular weight is 5.0 ⁇ 10 4 or less, it tends to be possible to suppress the increase in the viscosity of the curable composition, the increase in the molecular weight, the gelation of the varnish, and the increase in the prepreg viscosity. Cured products tend to be superior in low thermal expansion, heat resistance, and peel strength. Specifically, it is measured by the method described in Examples described later.
- the content of the thermosetting compound (D) is such that the cured product obtained by curing the curable composition of the present embodiment tends to have excellent low thermal expansion, heat resistance, and peel strength. It is preferably 25 to 50 parts by mass, preferably 30 to 45 parts by mass, with respect to a total of 100 parts by mass of the curable compound (D), the epoxy resin (E) described later, and the cyanate ester compound (F) described later. It is more preferable to have
- thermosetting compound (D1) Since the thermosetting compound (D) can exhibit sufficient varnish compatibility even when mixed with a thermosetting resin having poor varnish compatibility with silicone compounds, at least alkenylphenol (A) and epoxy A polymer (D1) obtained by polymerizing a modified silicone (B) and an epoxy compound (C) other than the epoxy-modified silicone (B) is preferred.
- the polymer (D1) is composed of at least alkenylphenol (A), epoxy-modified silicone (B), epoxy compound (C) other than epoxy-modified silicone (B), and phenol compound (G). It is preferable that the polymer is obtained by Each component that can be used for synthesizing the polymer (D1) is described below.
- Alkenylphenol (A) is not particularly limited as long as it is a compound having a structure in which one or more alkenyl groups are directly bonded to a phenolic aromatic ring.
- the thermosetting compound (D) or the polymer (D1) contains a structural unit derived from the alkenylphenol (A), so that the reaction-induced phase separation structure can be suitably controlled, so it is obtained
- the cured product can exhibit excellent low thermal expansion, heat resistance and peel strength.
- the alkenyl group includes, for example, alkenyl groups having 2 to 30 carbon atoms such as vinyl group, allyl group, propenyl group, butenyl group and hexenyl group.
- the alkenyl group is preferably an allyl group and/or a propenyl group, more preferably an allyl group, from the viewpoint of more effectively and reliably exhibiting the effects of the present embodiment.
- the number of alkenyl groups directly bonded to one phenolic aromatic ring is not particularly limited, and is, for example, 1-4.
- the number of alkenyl groups directly bonded to one phenolic aromatic ring is preferably 1 to 2, more preferably 1, from the viewpoint of more effectively and reliably exhibiting the effects of the present embodiment.
- the bonding position of the alkenyl group to the phenolic aromatic ring is not particularly limited.
- a phenolic aromatic ring is one in which one or more hydroxyl groups are directly bonded to an aromatic ring, and includes phenol rings and naphthol rings.
- the number of hydroxyl groups directly bonded to one phenolic aromatic ring is, for example, 1 to 2, preferably 1.
- the phenolic aromatic ring may have substituents other than alkenyl groups.
- substituents include linear alkyl groups having 1 to 10 carbon atoms, branched alkyl groups having 3 to 10 carbon atoms, cyclic alkyl groups having 3 to 10 carbon atoms, linear alkyl groups having 1 to 10 carbon atoms, A chain alkoxy group, a branched alkoxy group having 3 to 10 carbon atoms, a cyclic alkoxy group having 3 to 10 carbon atoms, and a halogen atom.
- the number of said substituents directly bonded to one phenolic aromatic ring is, for example, 1-2.
- the bonding position of the substituent to the phenolic aromatic ring is not particularly limited.
- Alkenylphenol (A) may have one or more structures in which one or more alkenyl groups are directly bonded to a phenolic aromatic ring. From the viewpoint of more effectively and reliably exhibiting the effects of the present embodiment, alkenylphenol (A) preferably has one or two structures in which one or more alkenyl groups are directly bonded to a phenolic aromatic ring, It is preferable to have two.
- the alkenylphenol (A) may be, for example, a compound represented by the following formula (1A) or the following formula (1B).
- Rxa each independently represents an alkenyl group having 2 to 8 carbon atoms
- Rxb each independently represents an alkyl group having 1 to 10 carbon atoms or a hydrogen atom
- Rxc is Each independently represents an aromatic ring having 4 to 12 carbon atoms
- Rxc may form a fused structure with a benzene ring
- Rxc may or may not exist
- A represents an alkylene group having 1 to 6 carbon atoms, an aralkylene group having 7 to 16 carbon atoms, an arylene group having 6 to 10 carbon atoms, a fluorenylidene group, a sulfonyl group, an oxygen atom, a sulfur atom, or a direct bond (single bond).
- Rxc does not exist, one benzene ring may have two or more Rxa and/or Rxb groups.
- Rxd each independently represents an alkenyl group having 2 to 8 carbon atoms
- Rxe each independently represents an alkyl group having 1 to 10 carbon atoms or a hydrogen atom
- Rxf is represents an aromatic ring having 4 to 12 carbon atoms
- Rxf may form a condensed structure with a benzene ring
- Rxf may or may not exist, and when Rxf does not exist,
- One benzene ring may have two or more Rxd and/or Rxe groups.
- alkenyl groups having 2 to 8 carbon atoms represented by Rxa and Rxd in formulas (1A) and (1B) include vinyl groups, allyl groups, propenyl groups, butenyl groups, and hexenyl groups.
- Rxa and Rxd are preferably allyl and/or propenyl groups, more preferably allyl groups.
- alkyl groups having 1 to 10 carbon atoms represented by Rxb and Rxe in formulas (1A) and (1B) include methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, and the like.
- Branched alkyl groups such as linear alkyl groups, isopropyl groups, isobutyl groups and tert-butyl groups can be mentioned.
- Examples of the alkylene group having 1 to 6 carbon atoms represented by A in the formula (1A) include a methylene group, an ethylene group, a trimethylene group and a propylene group.
- the aralkylene group having 7 to 16 carbon atoms represented by A includes, for example, the formula: -CH 2 -Ar-CH 2 -, -CH 2 -CH 2 -Ar-CH 2 -CH 2 -, or the formula: - A group represented by CH 2 —Ar—CH 2 —CH 2 — (wherein Ar represents a phenylene group, a naphthylene group, or a biphenylene group) can be mentioned.
- the arylene group having 6 to 10 carbon atoms represented by A includes, for example, a phenylene ring.
- Rxf is preferably a benzene ring (compound containing a dihydroxynaphthalene skeleton) from the viewpoint of more effectively and reliably exhibiting the effects of the present embodiment.
- Alkenylphenol (A) is an alkenylbisphenol in which one alkenyl group is bonded to each of two phenolic aromatic rings of a bisphenol from the viewpoint of further improving varnish compatibility and more preferably controlling the reaction-induced phase separation structure.
- alkenyl bisphenol is diallyl bisphenol in which two phenolic aromatic rings of the bisphenol are respectively bound to one allyl group, and/or two phenolic aromatic rings of the bisphenol are respectively bound to one propenyl group. preferably dipropenyl bisphenol.
- diallyl bisphenol examples include o, o'-diallyl bisphenol A (DABPA (trade name), Daiwa Kasei Kogyo Co., Ltd.), o, o'-diallyl bisphenol F, o, o'-diallyl bisphenol S, o, o'-diallyl bisphenol fluorene.
- dipropenyl bisphenol examples include o,o'-dipropenyl bisphenol A (PBA01 (trade name), Gunei Chemical Industry Co., Ltd.), o,o'-dipropenyl bisphenol F, o,o'-dipropenyl Bisphenol S and o,o'-dipropenyl bisphenol fluorene.
- the average number of phenol groups per molecule of alkenylphenol (A) is preferably 1 or more and less than 3, and 1.5 or more and 2.5 or less, from the viewpoint of more effectively and reliably exhibiting the effects of the present embodiment. It is more preferable to have The average number of phenol groups is calculated by the following formula.
- A represents the number of phenol groups in alkenylphenol having i phenol groups in the molecule
- Xi represents the ratio of alkenylphenol having i phenol groups in the molecule to all alkenylphenols
- X 1 + X 2 + . . . X n 1.
- Epoxy-modified silicone (B) is not particularly limited as long as it is a silicone compound or resin modified with an epoxy group-containing group.
- the thermosetting compound (D) or the polymer (D1) contains a structural unit derived from the epoxy-modified silicone (B), so that the resulting cured product exhibits excellent low thermal expansion and chemical resistance.
- the silicone compound or resin is not particularly limited as long as it is a compound having a polysiloxane skeleton in which siloxane bonds are repeatedly formed.
- the polysiloxane skeleton may be a linear skeleton, a cyclic skeleton, or a network skeleton.
- the polysiloxane skeleton is preferably a linear skeleton from the viewpoint of more effectively and reliably exhibiting the effects of the present embodiment.
- epoxy group-containing groups examples include groups represented by the following formula (a1).
- each R 0 is independently a single bond, an alkylene group (for example, an alkylene group having 1 to 5 carbon atoms such as a methylene group, an ethylene group and a propylene group), an arylene group, or an aralkylene group.
- X represent a monovalent group represented by the following formula (a2) or a monovalent group represented by the following formula (a3).
- Epoxy-modified silicone (B) preferably contains an epoxy-modified silicone having an epoxy equivalent of 140 to 250 g/mol, more preferably an epoxy-modified silicone having an epoxy equivalent of 145 to 245 g/mol. More preferably it contains an epoxy-modified silicone with an epoxy equivalent weight of ⁇ 240 g/mol.
- the curable composition has even more excellent varnish compatibility, and the obtained cured product has a low thermal expansion. It tends to be superior in durability, heat resistance, and peel strength, and tends to be able to further improve chemical resistance.
- Epoxy-modified silicone (B) provides a curable composition with even better varnish compatibility, and the resulting cured product has even better low thermal expansion, heat resistance, peel strength, and chemical resistance. From the viewpoint of further improvement, it is preferable to contain two or more epoxy-modified silicones.
- the two or more types of epoxy-modified silicones preferably have different epoxy equivalents, such as an epoxy-modified silicone having an epoxy equivalent of 50 to 350 g/mol (low equivalent epoxy-modified silicone B1) and an epoxy equivalent of 400 to 4000 g/mol.
- an epoxy-modified silicone (high-equivalent epoxy-modified silicone B2) having an epoxy equivalent of 140 to 250 g/mol (low-equivalent epoxy-modified silicone B1') and 450 It is further preferable to contain an epoxy-modified silicone having an epoxy equivalent weight of ⁇ 3000 g/mol (high-equivalent epoxy-modified silicone B2').
- the average epoxy equivalent of the epoxy-modified silicone (B) is preferably 140 to 3000 g/mol, more preferably 250 to 2000 g/mol. is more preferred, and 300 to 1000 g/mol is even more preferred.
- the average epoxy equivalent is calculated by the following formula.
- Ei represents the epoxy equivalent weight of one of the two or more epoxy-modified silicones
- Wi represents the proportion of the epoxy-modified silicone in the epoxy-modified silicone (B)
- W 1 +W 2 + . . . W n 1.
- the curable composition of the epoxy-modified silicone (B) has even better varnish compatibility, and the resulting cured product has even better low thermal expansion, heat resistance, and peel strength, and further chemical resistance. From the viewpoint of further improvement, it is preferable to contain an epoxy-modified silicone represented by the following formula (1).
- each R 1 independently represents a single bond, an alkylene group, an arylene group, or an aralkylene group
- each R 2 independently represents an alkyl group having 1 to 10 carbon atoms or a phenyl group.
- n represents an integer from 0 to 100.
- the alkylene group represented by R 1 may be linear, branched or cyclic.
- the number of carbon atoms in the alkylene group is preferably 1-12, more preferably 1-4.
- Alkylene groups include, for example, a methylene group, an ethylene group, or a propylene group. Among these, R 1 is preferably a propylene group.
- the arylene group represented by R 1 may have a substituent.
- the number of carbon atoms in the arylene group is preferably 6-40, more preferably 6-20.
- Arylene groups include, for example, phenylene groups, cyclohexylphenylene groups, hydroxyphenylene groups, cyanophenylene groups, nitrophenylene groups, naphthylene groups, biphenylene groups, anthrylene groups, pyrenylene groups, and fluorenylene groups. These groups may contain an ether bond, a ketone bond, or an ester bond.
- the aralkylene group represented by R 1 preferably has 7 to 30 carbon atoms, more preferably 7 to 13 carbon atoms.
- Examples of the aralkylene group include groups represented by the following formula (XI).
- the group represented by R 1 may further have a substituent.
- substituents include linear alkyl groups having 1 to 10 carbon atoms, A branched alkyl group, a cyclic alkyl group having 3 to 10 carbon atoms, a linear alkoxy group having 1 to 10 carbon atoms, a branched alkoxy group having 3 to 10 carbon atoms, and a cyclic alkoxy group having 3 to 10 carbon atoms mentioned.
- each R 2 independently represents an alkyl group having 1 to 10 carbon atoms or a phenyl group.
- the above alkyl group and phenyl group may have a substituent.
- the alkyl group having 1 to 10 carbon atoms may be linear, branched or cyclic.
- Alkyl groups include, for example, methyl, ethyl, propyl, butyl, pentyl, hexyl, isopropyl, isobutyl, and cyclohexyl groups.
- R 2 is preferably a methyl group or a phenyl group.
- n represents an integer of 0 or more, for example, an integer of 0 to 100.
- the curable composition has even better varnish compatibility, and the resulting cured product has even better low thermal expansion, heat resistance, and peel strength, and can further improve chemical resistance.
- the upper limit of n is preferably 50 or less, more preferably 30 or less, and even more preferably 20 or less.
- Epoxy-modified silicone (B) provides a curable composition with even better varnish compatibility, and the resulting cured product has even better low thermal expansion, heat resistance, peel strength, and chemical resistance. From the viewpoint of further improvement, it is preferable to contain two or more types of epoxy-modified silicones represented by formula (1). In this case, two or more types of epoxy-modified silicones preferably have different values of n. It is more preferable to contain a certain epoxy-modified silicone.
- the average number of epoxy groups per molecule of the epoxy-modified silicone (B) is preferably 1 or more and less than 3, and 1.5 or more and 2.5 or less, from the viewpoint of more effectively and reliably exhibiting the effects of the present embodiment. is more preferable.
- the average number of epoxy groups is calculated by the following formula.
- Bi represents the number of epoxy groups in the epoxy-modified silicone having i epoxy groups in the molecule
- Yi represents the ratio of the epoxy-modified silicone having i epoxy groups in the molecule to the total epoxy-modified silicone.
- Y 1 +Y 2 + . . . Y n 1.
- the content of the epoxy-modified silicone (B) is such that the curable composition has better varnish compatibility, and the resulting cured product has better low thermal expansion, heat resistance and peel strength, and chemical resistance. From the viewpoint of further expressing the properties and insulation reliability, it is preferably 5 to 95% by mass, and 10 to 90% by mass, based on the total 100% by mass of the epoxy-modified silicone (B) and the epoxy compound (C). more preferably 40 to 85% by mass, even more preferably 50 to 80% by mass.
- epoxy-modified silicone (B) As the epoxy-modified silicone (B), a commercially available product or a product manufactured by a known method may be used. Examples of commercially available products include “X-22-163" and “KF-105" manufactured by Shin-Etsu Chemical Co., Ltd.
- the epoxy compound (C) is an epoxy compound other than the epoxy-modified silicone (B), more specifically an epoxy compound that does not have a polysiloxane skeleton.
- the thermosetting compound (D) or the polymer (D1) contains a structural unit derived from the epoxy compound (C), so that the obtained cured product has low thermal expansion, heat resistance, peel strength, chemical resistance, and excellent insulation reliability.
- the epoxy compound (C) is not particularly limited as long as it is an epoxy compound other than the epoxy-modified silicone (B).
- Epoxy compound (C) the curable composition has a further excellent varnish compatibility, the obtained cured product has excellent low thermal expansion, heat resistance and peel strength, chemical resistance and insulation reliability From the viewpoint of being able to further express the properties, it is preferable to contain a bifunctional epoxy compound having two epoxy groups in one molecule.
- Bifunctional epoxy compounds include, for example, bisphenol type epoxy resins (e.g., bisphenol A type epoxy resin, bisphenol E type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, and bisphenol fluorene type epoxy resin), and phenols.
- bisphenol type epoxy resins e.g., bisphenol A type epoxy resin, bisphenol E type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, and bisphenol fluorene type epoxy resin
- phenols e.g., bisphenol A type epoxy resin, bisphenol E type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, and bisphenol fluorene type epoxy resin
- Novolac-type epoxy resins e.g., phenol novolac-type epoxy resins, bisphenol A novolak-type epoxy resins, cresol novolak-type epoxy resins
- trisphenolmethane-type epoxy resins aralkyl-type epoxy resins, biphenyl-type epoxy resins containing a biphenyl skeleton, naphthalene skeleton-containing naphthalene-type epoxy resin, dihydroanthracene-containing anthracene-type epoxy resin, glycidyl ester-type epoxy resin, polyol-type epoxy resin, isocyanurate ring-containing epoxy resin, dicyclopentadiene-type epoxy resin, fluorene-containing skeleton Fluorene-type epoxy resins, epoxy resins composed of bisphenol A-type structural units and hydrocarbon-based structural units; and halogen compounds thereof. These epoxy compounds are used individually by 1 type or in combination of 2 or more types.
- aralkyl-type epoxy resins examples include compounds represented by the following formula (b1).
- Ar 3 each independently represents a benzene ring or naphthalene ring
- Ar 4 represents a benzene ring, naphthalene ring, or biphenyl ring
- R 3a each independently represents a hydrogen atom. or represents a methyl group
- the benzene ring or naphthalene ring in Ar 3 may further have one or more substituents, and the substituents are, for example, a glycidyloxy group such as an alkyl group having 1 to 5 carbon atoms or a phenyl group.
- the benzene ring, naphthalene ring or biphenyl ring in Ar 4 may further have one or more substituents, and the substituents are, for example, a glycidyloxy group such as an alkyl group having 1 to 5 carbon atoms or a phenyl group. It may be a substituent other than
- biphenyl-type epoxy resins examples include compounds represented by the following formula (b2) (compound b2).
- each R a independently represents an alkyl group having 1 to 10 carbon atoms or a hydrogen atom.
- the alkyl group having 1 to 10 carbon atoms may be linear, branched or cyclic.
- Alkyl groups include, for example, methyl, ethyl, propyl, butyl, pentyl, hexyl, isopropyl, isobutyl, and cyclohexyl groups.
- the biphenyl-type epoxy resin may be in the form of a mixture of compounds b2 having different numbers of R a as alkyl groups. Specifically, it is preferably a mixture of biphenyl-type epoxy resins having different numbers of R a as alkyl groups. More preferred is a mixture of compounds b2 wherein the number is four.
- Examples of commercially available products of the compound represented by the above formula (b2) include "YL-6121H (trade name)” manufactured by Mitsubishi Chemical Corporation.
- naphthalene-type epoxy resins examples include compounds represented by the following formula (b3).
- each R 3b is independently a hydrogen atom, an alkyl group having 1 to 5 carbon atoms (eg, methyl group or ethyl group), an aralkyl group, a benzyl group, a naphthyl group, at least one glycidyloxy or a naphthylmethyl group containing at least one glycidyloxy group, n is an integer greater than or equal to 0 (eg, 0 to 2).
- dicyclopentadiene-type epoxy resins examples include compounds represented by the following formula (b4).
- each R 3c independently represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms (eg, methyl group or ethyl group).
- dicyclopentadiene type epoxy resin A commercially available product or a product manufactured by a known method may be used as the dicyclopentadiene type epoxy resin.
- Commercial products of dicyclopentadiene type epoxy resin include "EPICRON HP-7200L”, “EPICRON HP-7200”, “EPICRON HP-7200H” and "EPICRON HP-7000HH” manufactured by Dainippon Ink and Chemicals. mentioned.
- epoxy resins composed of bisphenol A-type structural units and hydrocarbon-based structural units include compounds represented by the following formula (b5).
- R 1x and R 2x each independently represent a hydrogen atom or a methyl group
- R 3x to R 6x each independently represent a hydrogen atom, a methyl group, a chlorine atom, or a bromine atom
- X is an ethyleneoxyethyl group, di(ethyleneoxy)ethyl group, tri(ethyleneoxy)ethyl group, propyleneoxypropyl group, di(propyleneoxy)propyl group, tri(propyleneoxy)propyl group, or carbon It represents an alkylene group of numbers 2 to 15 (eg, methylene group or ethylene group).
- the epoxy compound (C) provides the curable composition with more excellent varnish compatibility, and the resulting cured product has superior low thermal expansion, heat resistance, and peel strength, and chemical resistance.
- the average number of epoxy groups per molecule of the epoxy compound (C) is preferably 1 or more and less than 3, and 1.5 or more and 2.5 or less, from the viewpoint of more effectively and reliably exhibiting the effects of the present embodiment. It is more preferable to have The average number of epoxy groups is calculated by the following formula.
- Ci represents the number of epoxy groups in an epoxy compound having i epoxy groups in the molecule
- Zi represents the ratio of the epoxy compounds having i epoxy groups in the molecule to the total epoxy compounds
- Z 1 + Z 2 + . . . Z n 1.
- the content of the epoxy compound (C) is such that the curable composition has further excellent varnish compatibility, and the resulting cured product has excellent low thermal expansion, heat resistance, and peel strength, and chemical resistance. , and from the viewpoint of further expressing insulation reliability, it is preferably 5 to 95% by mass, and 10 to 90% by mass, relative to the total 100% by mass of the epoxy-modified silicone (B) and the epoxy compound (C). more preferably 15 to 60% by mass, even more preferably 20 to 50% by mass.
- thermosetting compound (D) or the polymer (D1) makes the curable composition more excellent in varnish compatibility, and makes the obtained cured product more excellent in heat resistance and peel strength, It preferably contains a structural unit derived from a phenol compound (G) other than alkenylphenol (A).
- phenol compound (G) examples include bisphenol-type phenol resins (e.g., bisphenol A-type resin, bisphenol E-type resin, bisphenol F-type resin, bisphenol S-type resin, etc.), phenolic novolac resins (e.g., phenol novolak resin, naphthol novolak resin, etc.).
- bisphenol-type phenol resins e.g., bisphenol A-type resin, bisphenol E-type resin, bisphenol F-type resin, bisphenol S-type resin, etc.
- phenolic novolac resins e.g., phenol novolak resin, naphthol novolak resin, etc.
- phenol compounds (G) are used singly or in combination of two or more.
- the phenolic compound (G) is a curable composition having even more excellent varnish compatibility, and the resulting cured product has excellent low thermal expansion, heat resistance, and peel strength.
- a bifunctional phenol compound having two phenolic hydroxyl groups in one molecule is preferred.
- bifunctional phenol compounds include bisphenol, biscresol, bisphenols having a fluorene skeleton (e.g., bisphenol having a fluorene skeleton, biscresol having a fluorene skeleton, etc.), biphenols (e.g., p,p'-biphenol, etc.), dihydroxy diphenyl ether (e.g., 4,4'-dihydroxydiphenyl ether, etc.), dihydroxydiphenyl ketone (e.g., 4,4'-dihydroxydiphenyl ketone, etc.), dihydroxydiphenyl sulfide (e.g., 4,4'-dihydroxydiphenyl sulfide, etc.), dihydroxyarene (eg, hydroquinone, etc.).
- bisphenol biscresol
- bisphenols having a fluorene skeleton e.g., bisphenol having a fluorene skeleton, biscresol having a fluorene
- bifunctional phenol compounds are used singly or in combination of two or more.
- the bifunctional phenol compound is at least one selected from the group consisting of bisphenol, biscresol, and bisphenols having a fluorene skeleton, from the viewpoint of excellent low thermal expansion, heat resistance, and peel strength. is preferred, and bisphenols having a fluorene skeleton are more preferred. From the same viewpoint as above, bis-cresol fluorene is preferable as the bisphenols having a fluorene skeleton.
- thermosetting compound (D) or polymer (D1) is not particularly limited, but examples include alkenylphenol (A) and epoxy-modified silicone ( It can be obtained by a step of reacting B), an epoxy compound (C), and optionally a phenol compound (G) in the presence of a polymerization catalyst, which will be described later.
- the reaction may be performed in the presence of an organic solvent. More specifically, in the above step, the addition reaction between the epoxy group of the epoxy-modified silicone (B) and the epoxy compound (C) and the hydroxyl group of the alkenylphenol (A), and the hydroxyl group of the resulting addition reaction product.
- the addition reaction of the epoxy-modified silicone (B) and the epoxy group of the epoxy compound (C) proceeds to obtain the thermosetting compound (D) or the polymer (D1).
- the amount of the alkenylphenol (A) is such that the curable composition has even better varnish compatibility, and the obtained cured product, From the viewpoint of better low thermal expansion, heat resistance, and peel strength, alkenylphenol (A), epoxy-modified silicone (B), epoxy compound (C), and phenolic compound (G) total 100 parts by mass, It is preferably 1 to 50 parts by mass, more preferably 3 to 40 parts by mass, even more preferably 5 to 30 parts by mass.
- the blending amount of the epoxy-modified silicone (B) is such that the curable composition has further excellent varnish compatibility, and the obtained cured product has excellent low thermal expansion, heat resistance, and peel strength, and has low thermal expansion.
- the amount of the epoxy compound (C) is such that the curable composition has better varnish compatibility, and the resulting cured product has better low thermal expansion, heat resistance, and peel strength, and chemical resistance. , and from the viewpoint of further expressing insulation reliability, 5 to 50 mass parts per 100 mass parts in total of alkenylphenol (A), epoxy-modified silicone (B), epoxy compound (C), and phenolic compound (G) parts, more preferably 10 to 30 parts by mass, even more preferably 15 to 25 parts by mass.
- the amount of the phenol compound (G) is, from the viewpoint that the curable composition has even better varnish compatibility and the resulting cured product has better low thermal expansion, heat resistance, and peel strength, alkenyl It is preferably 5 to 30 parts by mass, preferably 10 to 30 parts by mass, with respect to a total of 100 parts by mass of phenol (A), epoxy-modified silicone (B), epoxy compound (C), and phenolic compound (G). more preferably 15 to 25 parts by mass.
- thermosetting compound (D) or the polymer (D1) does not contain the phenolic compound (G), each of the alkenylphenol (A), the epoxy-modified silicone (B), and the epoxy compound (C)
- the compounding amount indicates the compounding amount for a total of 100 parts by mass of alkenylphenol (A), epoxy-modified silicone (B), and epoxy compound (C).
- polymerization catalysts examples include imidazole catalysts and phosphorus catalysts. These catalysts are used individually by 1 type or in combination of 2 or more types. Among these, imidazole catalysts are preferred.
- imidazole catalysts examples include 2-methylimidazole, 2-ethyl-4-methylimidazole, 2-phenylimidazole, 1-cyanoethyl-2-phenylimidazole, 1-cyanoethyl-2-phenylimidazole, 1-cyanoethyl-2- Ethyl-4-methylimidazole, 2-phenyl-4,5-dihydroxymethylimidazole, 2-phenyl-4-methyl-5-hydroxymethylimidazole, 2,3-dihydro-1H-pyrrolo[1,2-a]benzo
- imidazoles such as imidazole (TBZ (trade name), Shikoku Kasei Kogyo Co., Ltd.) and 2,4,5-triphenylimidazole (TPIZ (trade name), Tokyo Chemical Industry Co., Ltd.).
- 2,3-dihydro-1H-pyrrolo[1,2-a]benzimidazole and/or 2,4,5-triphenylimidazole are preferred from the viewpoint of
- the amount of polymerization catalyst (preferably imidazole catalyst) used is, for example, 0 per 100 parts by mass of alkenylphenol (A), epoxy-modified silicone (B), epoxy compound (C), and phenolic compound (G). .1 to 10 parts by mass. From the viewpoint of increasing the weight average molecular weight of the thermosetting compound (D) or the polymer (D1), the amount of the polymerization catalyst used is preferably 0.5 parts by mass or more, and 4.0 parts by mass or less. is more preferable.
- a polar solvent or a non-polar solvent can be used as the organic solvent.
- polar solvents include ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone; cellosolve solvents such as propylene glycol monomethyl ether and propylene glycol monomethyl ether acetate; ethyl lactate, methyl acetate, ethyl acetate, butyl acetate, isoamyl acetate, ester solvents such as ethyl lactate, methyl methoxypropionate and methyl hydroxyisobutyrate; and amides such as dimethylacetamide and dimethylformamide.
- nonpolar solvents include aromatic hydrocarbons such as toluene and xylene. These solvents are used singly or in combination of two or more.
- the amount of the organic solvent used is not particularly limited, but for example, alkenylphenol (A), epoxy-modified silicone (B), epoxy compound (C), and phenolic compound (G) per 100 parts by mass in total , 50 to 150 parts by mass.
- the reaction temperature is not particularly limited, and may be, for example, 100-170°C.
- the reaction time is also not particularly limited, and may be, for example, 3 to 8 hours.
- thermosetting compound (D) or polymer (D1) may be separated and purified from the reaction mixture by a conventional method.
- the curable composition of this embodiment contains an epoxy resin (E).
- the epoxy resin (E) is different from the epoxy-modified silicone (B), but may be the same as or different from the epoxy compound (C).
- the thermosetting compound (D) by using the epoxy resin (E) with the cyanate ester compound (F) at a specific functional group equivalent ratio, the varnish compatibility is further improved, and the cured product has a low thermal expansion. properties, heat resistance, and high peel strength can be exhibited at the same time, and chemical resistance and insulation reliability can be further improved.
- Epoxy resin (E) can be used individually by 1 type or in combination of 2 or more types as appropriate.
- epoxy resin (E) typically, a bifunctional epoxy compound having two epoxy groups in one molecule or a polyfunctional epoxy compound having three or more epoxy groups in one molecule can be used.
- Epoxy compound (E) the curable composition has a further excellent varnish compatibility, the obtained cured product has excellent low thermal expansion, heat resistance and peel strength, chemical resistance and insulation reliability It is preferable to contain a bifunctional epoxy compound and/or a polyfunctional epoxy compound from the viewpoint of being able to further express the properties.
- the epoxy compound (E) is not particularly limited, but a compound represented by the following formula (3a) can be used.
- Ar 3 each independently represents a benzene ring or naphthalene ring
- Ar 4 represents a benzene ring, naphthalene ring, or biphenyl ring
- R 3a each independently represents a hydrogen atom. or represents a methyl group
- k represents an integer of 1 to 50
- the benzene ring or naphthalene ring in Ar 3 may further have one or more substituents, and the substituent may be a glycidyloxy group (not shown), or other substituents such as It may be an alkyl group having 1 to 5 carbon atoms, a phenyl group, etc.
- the benzene ring, naphthalene ring, or biphenyl ring in Ar 4 may further have one or more substituents, which may be a glycidyloxy group, other substituents such as carbon It may be an alkyl group of number 1 to 5, a phenyl group, or the like.
- examples of bifunctional epoxy compounds include compounds represented by the following formula (b1).
- Ar 3 each independently represents a benzene ring or naphthalene ring
- Ar 4 represents a benzene ring, naphthalene ring, or biphenyl ring
- R 3a each independently represents a hydrogen atom. or represents a methyl group
- the benzene ring or naphthalene ring in Ar 3 may further have one or more substituents, and the substituents are, for example, a glycidyloxy group such as an alkyl group having 1 to 5 carbon atoms or a phenyl group.
- the benzene ring, naphthalene ring or biphenyl ring in Ar 4 may further have one or more substituents, and the substituents are, for example, a glycidyloxy group such as an alkyl group having 1 to 5 carbon atoms or a phenyl group. It may be a substituent other than
- the compound represented by formula (3a) is preferably a phenolic novolac type epoxy resin in which Ar 4 in formula (3a) is at least substituted with a glycidyloxy group.
- the phenolic novolac epoxy resin is not particularly limited, but examples thereof include a compound represented by the following formula (3-1) (a naphthalene skeleton-containing polyfunctional epoxy resin having a naphthalene skeleton) and a naphthalene cresol novolac epoxy resin. mentioned.
- each Ar 31 independently represents a benzene ring or a naphthalene ring
- each Ar 41 independently represents a benzene ring, a naphthalene ring or a biphenyl ring
- each R 31a Each ring independently represents a hydrogen atom or a methyl group
- kz represents an integer of 1 to 50
- each ring represents a substituent other than a glycidyloxy group (e.g., an alkyl group having 1 to 5 carbon atoms, an alkyl group having 1 to 5 carbon atoms, or a phenyl group)
- at least one of Ar 31 and Ar 41 represents a naphthalene ring.
- Compounds represented by formula (3-1) include compounds represented by formula (3-2).
- R represents a methyl group
- kz has the same meaning as kz in formula (3-1) above.
- the naphthalene cresol novolak type epoxy resin is not particularly limited, but for example, a cresol/naphthol novolak type epoxy resin represented by the following formula (NE) is preferable.
- the compound represented by the following formula (NE) is a random copolymer of a cresol novolak epoxy structural unit and a naphthol novolak epoxy structural unit, and both cresol epoxy and naphthol epoxy can be terminals.
- n and n in formula (NE) each represent an integer of 1 or more.
- naphthalene cresol novolac type epoxy resin a commercially available product or a product manufactured by a known method may be used.
- commercially available products include "NC-7000", “NC-7300” and “NC-7300L” manufactured by Nippon Kayaku Co., Ltd., and "HP-9540” and “HP-9500” manufactured by DIC Corporation. and "HP-9540" is particularly preferred.
- the compound represented by formula (3a) may be a compound (hereinafter also referred to as "aralkyl epoxy resin") that does not correspond to the phenolic novolac epoxy resins described above.
- Aralkyl-type epoxy resins include compounds in which Ar 3 is a naphthalene ring and Ar 4 is a benzene ring in the formula (3a) (also referred to as a "naphthol aralkyl- type epoxy resin”); It is preferably a compound in which it is a benzene ring and Ar 4 is a biphenyl ring (also referred to as a "biphenylaralkyl-type epoxy resin”), and more preferably a biphenylaralkyl-type epoxy resin.
- naphthol aralkyl type epoxy resin a commercially available product or a product manufactured by a known method may be used.
- Examples of commercially available products include “HP-5000” and “HP-9900” manufactured by DIC Corporation, and “ESN-375” and “ESN-475" manufactured by Nippon Steel Chemical & Materials Co., Ltd.
- the biphenyl aralkyl type epoxy resin is preferably a compound represented by formula (3b).
- ka represents an integer of 1 or more, preferably 1 to 20, more preferably 1 to 6.
- bifunctional epoxy compounds include, for example, compounds in which ka is 1 in formula (3b).
- biphenyl aralkyl type epoxy resin a commercially available product or a product manufactured by a known method may be used.
- commercially available products include “NC-3000”, “NC-3000L”, and “NC-3000FH” manufactured by Nippon Kayaku Co., Ltd.
- the epoxy compound (E) it is preferable to use a naphthalene-type epoxy resin (excluding those corresponding to the compound represented by formula (3a)).
- a naphthalene-type epoxy resin it has better varnish compatibility, and the resulting cured product has better low thermal expansion, heat resistance, and peel strength, and can further exhibit chemical resistance and insulation reliability. From the point of view, it is preferably a naphthylene ether type epoxy resin.
- the naphthylene ether type epoxy resin has the following formula (3-3) from the viewpoint that the resulting cured product has excellent low thermal expansion, heat resistance, and peel strength, and can further improve chemical resistance and insulation reliability.
- a bifunctional epoxy compound represented by the following formula (3-4), or a polyfunctional epoxy compound represented by the following formula (3-4), or a mixture thereof is preferable.
- each R 13 is independently a hydrogen atom, an alkyl group having 1 to 3 carbon atoms (eg, methyl group or ethyl group), or an alkenyl group having 2 to 3 carbon atoms (eg, vinyl group, allyl group or propenyl group).
- each R 14 is independently a hydrogen atom, an alkyl group having 1 to 3 carbon atoms (eg, methyl group or ethyl group), or an alkenyl group having 2 to 3 carbon atoms (eg, vinyl group, allyl group or propenyl group).
- a commercially available product or a product manufactured by a known method may be used as the naphthylene ether type epoxy resin.
- Commercially available naphthylene ether type epoxy resins include, for example, DIC Corporation products "HP-6000", “EXA-7300”, “EXA-7310", “EXA-7311”, “EXA-7311L”, “ EXA7311-G3", “EXA7311-G4", "EXA-7311G4S", "EXA-7311G5" and the like, and "HP-6000" is particularly preferred.
- naphthalene-type epoxy resins other than those described above include, but are not limited to, compounds represented by the following formula (b3).
- each R 3b is independently a hydrogen atom, an alkyl group having 1 to 5 carbon atoms (eg, methyl group or ethyl group), an aralkyl group, a benzyl group, a naphthyl group, at least one glycidyloxy or a naphthylmethyl group containing at least one glycidyloxy group, n is an integer greater than or equal to 0 (eg, 0 to 2).
- dicyclopentadiene type epoxy resins (excluding those corresponding to the epoxy compound (C) described above) can be used.
- the dicyclopentadiene type epoxy resin is not particularly limited, but includes, for example, compounds represented by formula (3-5).
- each R 3c independently represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and k2 represents an integer of 0-10.
- the compound represented by the above formula (3-5) is not particularly limited, but may be, for example, a compound represented by the following formula (b4).
- each R 3c independently represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms (eg, methyl group or ethyl group).
- dicyclopentadiene type epoxy resin a commercially available product or a product manufactured by a known method may be used.
- Commercial products of dicyclopentadiene type epoxy resin include "EPICRON HP-7200L”, “EPICRON HP-7200”, “EPICRON HP-7200H” and "EPICRON HP-7000HH” manufactured by Dainippon Ink and Chemicals. mentioned.
- the epoxy compound (E) has even better varnish compatibility, and the resulting cured product has even better low thermal expansion, heat resistance, and peel strength, chemical resistance, and insulation.
- it preferably contains at least one selected from the group consisting of epoxy compounds represented by formula (3a), naphthalene-type epoxy resins, and dicyclopentadiene-type epoxy resins. It is more preferable to contain at least one selected from the group consisting of epoxy compounds represented by (3a) and naphthalene-type epoxy resins.
- the epoxy compound represented by Formula (3a) preferably contains a naphthalene cresol novolac type epoxy resin, and the naphthalene type epoxy resin preferably contains a naphthylene ether type epoxy resin.
- the epoxy compound (E) may contain other epoxy resins that do not correspond to the epoxy compounds described above.
- Other epoxy resins include, but are not particularly limited to, bisphenol-type epoxy resin, trisphenolmethane-type epoxy resin, anthracene-type epoxy resin, glycidyl ester-type epoxy resin, polyol-type epoxy resin, isocyanurate ring-containing epoxy resin, and fluorene-type epoxy resin. Examples thereof include resins and epoxy resins composed of bisphenol A structural units and hydrocarbon structural units. As other epoxy resins, among the above, it has better varnish compatibility, and the resulting cured product has better low thermal expansion, heat resistance, and peel strength, chemical resistance, and insulation reliability.
- a bisphenol type epoxy resin can be included from the viewpoint of further development, and examples of bisphenol type epoxy resins include diallyl bisphenol type epoxy resins (e.g., diallyl bisphenol A type epoxy resin, diallyl bisphenol E type epoxy resin, diallyl bisphenol F type epoxy resin, diallyl bisphenol S type epoxy resin, etc.) can be used.
- diallyl bisphenol type epoxy resins e.g., diallyl bisphenol A type epoxy resin, diallyl bisphenol E type epoxy resin, diallyl bisphenol F type epoxy resin, diallyl bisphenol S type epoxy resin, etc.
- epoxy compound (E) one of the epoxy compounds described above may be used alone, or two or more may be used in combination.
- the average number of epoxy groups per molecule of the epoxy compound (E) is preferably 1 or more and less than 3, and 1.5 or more and 2.5 or less, from the viewpoint of more effectively and reliably exhibiting the effects of the present embodiment. It is more preferable to have The average number of epoxy groups is calculated by the following formula.
- Ci represents the number of epoxy groups of an epoxy compound having i epoxy groups in the molecule
- Zi represents the ratio of the epoxy compounds having i epoxy groups in the molecule to the total epoxy compounds
- Z 1 +Z 2 + . . . Z n 1.
- the total content of the epoxy resin (E) and the cyanate ester compound (F) described later is the thermosetting compound ( It is preferably 50 to 75 parts by mass, more preferably 55 to 70 parts by mass with respect to 100 parts by mass of D), epoxy resin (E) and cyanate ester compound (F) described later.
- the total content of the thermosetting compound (D), the epoxy resin (E) described later, and the cyanate ester compound (F) described later in the curable composition of the present embodiment is such that the obtained cured product has low thermal expansion. , Since heat resistance and peel strength tend to be more excellent, it is preferably 50 to 99 parts by mass, and 60 to 95 parts by mass with respect to 100 parts by mass of the resin solid content in the resin composition. is more preferable, and 70 to 90 parts by mass is even more preferable.
- the curable composition of this embodiment contains a cyanate ester compound (F).
- a cyanate ester compound (F) By using the cyanate ester compound (F) with the epoxy resin (E) at a specific functional group equivalent ratio together with the thermosetting compound (D), the cured product has low thermal expansion, heat resistance, and high peel strength. It can be expressed at the same time, and the chemical resistance can be further improved.
- the cyanate ester compound (F) can be used singly or in an appropriate combination of two or more.
- the cyanate ester compound (F) is not particularly limited as long as it is a compound having two or more cyanate groups (cyanate ester groups) in one molecule.
- the cyanate ester compound (F) is a naphthol aralkyl-type cyanate ester compound from the viewpoint that the resulting cured product has excellent low thermal expansion, heat resistance, and peel strength, and can further improve chemical resistance. and/or a novolak-type cyanate ester compound, more preferably a naphthol aralkyl-type cyanate ester compound.
- the naphthol aralkyl-type cyanate ester compound is a compound represented by the formula (4) from the viewpoint that the obtained cured product has further excellent low thermal expansion, heat resistance, and peel strength, and can further improve chemical resistance. It is further preferred to contain As the novolac-type cyanate ester compound, it is more preferable to include the compound represented by Formula (5), excluding the compound represented by Formula (4).
- each R6 independently represents a hydrogen atom or a methyl group
- n2 represents an integer of 1 or more.
- n2 is preferably an integer of 1-20, more preferably an integer of 1-10, and even more preferably an integer of 1-6.
- each R ya is independently an alkenyl group having 2 to 8 carbon atoms or a hydrogen atom
- each R yb is independently an alkyl group having 1 to 10 carbon atoms or hydrogen represents an atom
- each R yc independently represents an aromatic ring having 4 to 12 carbon atoms
- R yc may form a condensed structure with a benzene ring
- R yc may be present , which may be absent
- a 1a each independently represents an alkylene group having 1 to 6 carbon atoms, an aralkylene group having 7 to 16 carbon atoms, an arylene group having 6 to 10 carbon atoms, a fluorenylidene group, a sulfonyl group , an oxygen atom, a sulfur atom, or a single bond (direct bond), and when R yc does not exist, one benzene ring may have two or more R ya and/or R yb groups.
- n represents an integer of 1-20
- alkenyl groups having 2 to 8 carbon atoms represented by Rya in formula (5) include vinyl groups, allyl groups, propenyl groups, butenyl groups, and hexenyl groups.
- the alkyl group having 1 to 10 carbon atoms represented by Ryb includes, for example, linear alkyl groups such as methyl group, ethyl group, propyl group, butyl group, pentyl group and hexyl group; branched alkyl groups such as radicals, isobutyl groups and tert-butyl groups.
- examples of the C 1-6 alkylene group represented by A 1a include a methylene group, an ethylene group, a trimethylene group and a propylene group.
- the aralkylene group having 7 to 16 carbon atoms represented by A 1a includes, for example, the formulas: -CH 2 -Ar-CH 2 -, -CH 2 -CH 2 -Ar-CH 2 —CH 2 —, or a group represented by the formula: —CH 2 —Ar—CH 2 —CH 2 — (wherein Ar represents a phenylene group, a naphthylene group, or a biphenylene group).
- the arylene group having 6 to 10 carbon atoms represented by A 1a includes, for example, a phenylene ring.
- n represents an integer of 1-20, preferably an integer of 1-15, more preferably an integer of 1-10.
- the compound represented by formula (5) is preferably a phenol novolak-type cyanate ester compound, and the phenol novolac-type cyanate ester compound is preferably a compound represented by formula (c1).
- each Rx independently represents a hydrogen atom or a methyl group
- each R independently represents an alkenyl group having 2 to 8 carbon atoms, an alkyl group having 1 to 10 carbon atoms, or hydrogen represents an atom
- n represents an integer of 1-10.
- cyanate ester compounds (F) may be produced according to known methods. Specific production methods include, for example, the method described in JP-A-2017-195334 (particularly paragraphs 0052 to 0057).
- the curable composition of the present embodiment may further contain a maleimide compound from the viewpoint of further improving the low thermal expansion property, heat resistance, and peel strength of the obtained cured product and further improving the chemical resistance.
- a maleimide compound from the viewpoint of further improving the low thermal expansion property, heat resistance, and peel strength of the obtained cured product and further improving the chemical resistance.
- the maleimide compounds can be used singly or in combination of two or more.
- the maleimide compound is not particularly limited as long as it is a compound having one or more maleimide groups in one molecule. -hydroxyphenylmaleimide, etc.), polymaleimide compounds having two or more maleimide groups in one molecule (e.g., bis(4-maleimidophenyl)methane, 2,2-bis(4-(4-maleimidophenoxy)-phenyl) propane, bis(3-ethyl-5-methyl-4-maleimidophenyl)methane, bis(3,5-dimethyl-4-maleimidophenyl)methane, bis(3,5-diethyl-4-maleimidophenyl)methane), m-phenylene bismaleimide, 4-methyl-1,3-phenylene bismaleimide, 1,6'-bismaleimide-(2,2,4-trimethyl)hexane, a maleimide compound represented by the following formula (3), Maleimide compounds represented by the formula (3′), prepolymers of these maleimi
- each R 5 independently represents a hydrogen atom or a methyl group, and n 1 represents an integer of 1-100.
- n 1 is 1 or more, preferably 1-100, more preferably 1-10.
- each R 13 independently represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or a phenyl group, and n 4 represents an integer of 1-10.
- the maleimide compound is bis(4-maleimidophenyl)methane, 2,2-bis(4-(4- maleimidophenoxy)-phenyl)propane, bis(3-ethyl-5-methyl-4-maleimidophenyl)methane, a maleimide compound represented by formula (3), and a maleimide compound represented by formula (3′) It preferably contains at least one selected from the group.
- maleimide compound a commercially available product or a product manufactured by a known method may be used.
- Commercially available maleimide compounds include "BMI-70", “BMI-80” and “BMI-1000P” manufactured by K.I. -4000”, “BMI-5100”, “BMI-7000”, “BMI-2300”, Nippon Kayaku Co., Ltd. product “MIR-3000-70MT” (R 13 in formula (3′) are all hydrogen atoms and n4 is a mixture of 1 to 10).
- the content of the maleimide compound is the thermosetting compound (D), the epoxy resin (E), and the cyanate ester compound (F), since the resulting cured product has excellent low thermal expansion, heat resistance, and peel strength. It is preferably 5 to 45 parts by mass, more preferably 20 to 45 parts by mass, with respect to the total 100 parts by mass.
- the curable composition of the present embodiment may further contain a phenol compound as long as it does not inhibit the effects of the curable composition of the present embodiment.
- the phenol compound may be the same as or different from the alkenylphenol (A) and the phenol compound (G) other than the alkenylphenol (A).
- a phenol compound can be used individually by 1 type or in combination of 2 or more types as appropriate.
- the phenol compound is not particularly limited as long as it is a compound having two or more phenolic hydroxyl groups in one molecule.
- examples include phenols and bisphenols (e.g., bisphenol A, bisphenol E, bisphenol F, bisphenol S, etc.), diallyl bisphenols (e.g., diallyl bisphenol A, diallyl bisphenol E, diallyl bisphenol F, diallyl bisphenol S, etc.), phenolic novolak resins (e.g., phenol novolak resin, naphthol novolak resins, cresol novolak resins, etc.), naphthalene-type phenol resins, dihydroanthracene-type phenol resins, dicyclopentadiene-type phenol resins, biphenyl-type phenol resins, and aralkyl-type phenol resins. These phenol compounds are used singly or in combination of two or more.
- the phenol compound preferably contains an aralkyl-type phenol
- aralkyl-type phenolic resin examples include compounds represented by formula (c2).
- Ar 1 each independently represents a benzene ring or naphthalene ring
- Ar 2 represents a benzene ring, naphthalene ring, or biphenyl ring
- R 2a each independently represents hydrogen.
- m represents an integer of 1 to 50
- each ring may have a substituent other than a hydroxyl group (eg, an alkyl group having 1 to 5 carbon atoms, a phenyl group, etc.).
- Ar 1 is a naphthalene ring and Ar 2 is A compound having a benzene ring (hereinafter also referred to as a “naphthol aralkyl-type phenolic resin"), and a compound in which Ar 1 is a benzene ring and Ar 2 is a biphenyl ring in the formula (c2) (hereinafter referred to as a "biphenyl aralkyl-type Also referred to as "phenolic resin").
- the naphthol aralkyl-type phenol resin is preferably a compound represented by formula (2b).
- each R 2a independently represents a hydrogen atom or a methyl group (preferably a hydrogen atom), and m represents an integer of 1 to 10 (preferably an integer of 1 to 6).
- the biphenylaralkyl-type phenolic resin is preferably a compound represented by formula (2c).
- R 2b each independently represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or a phenyl group (preferably a hydrogen atom), and m1 is an integer of 1 to 20 (preferably integer from 1 to 6).
- a commercially available product or a product synthesized by a known method may be used as the aralkyl-type phenol resin.
- Commercially available aralkyl-type phenolic resins include "KAYAHARD GPH-65”, “KAYAHARD GPH-78", “KAYAHARD GPH-103” (biphenylaralkyl-type phenolic resin) manufactured by Nippon Kayaku Co., Ltd., Nippon Steel Chemical & Materials "SN-495" (naphthol aralkyl type phenolic resin) manufactured by Co., Ltd. can be mentioned.
- the content of the phenol compound is the thermosetting compound (D), the epoxy resin (E), and the cyanate ester compound (F), from the viewpoint of the obtained cured product having excellent low thermal expansion, heat resistance, and peel strength. It is preferably 1 to 40 parts by mass with respect to a total of 100 parts by mass.
- the curable composition of the present embodiment may further contain an alkenyl-substituted nadimide compound as long as the effects of the curable composition of the present embodiment are not impaired.
- the alkenyl-substituted nadimide compounds can be used singly or in combination of two or more.
- the alkenyl-substituted nadimide compound is not particularly limited as long as it is a compound having one or more alkenyl-substituted nadimide groups in one molecule, and examples thereof include compounds represented by the following formula (2d).
- each R 1 independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms (e.g., methyl group or ethyl group), and R 2 represents alkylene having 1 to 6 carbon atoms. group, a phenylene group, a biphenylene group, a naphthylene group, or a group represented by the following formula (6) or (7).
- R3 denotes a methylene group, an isopropylidene group, CO, O, S or SO2 .
- each R 4 independently represents an alkylene group having 1 to 4 carbon atoms or a cycloalkylene group having 5 to 8 carbon atoms.
- alkenyl-substituted nadimide compound represented by formula (2d) a commercially available product or a product manufactured according to a known method may be used.
- Commercially available products include “BANI-M” and “BANI-X” manufactured by Maruzen Petrochemical Co., Ltd.
- the content of the alkenyl-substituted nadimide compound is the thermosetting compound (D), the epoxy resin (E) and the cyanate ester compound ( It is preferably 1 to 40 parts by mass with respect to 100 parts by mass of F).
- the curable composition of the present embodiment may further contain other resins as long as the effects of the curable composition of the present embodiment are not impaired.
- Other resins include, for example, oxetane resins, benzoxazine compounds, and compounds having polymerizable unsaturated groups. These resins or compounds can be used singly or in combination of two or more.
- oxetane resins include oxetane, 2-methyloxetane, 2,2-dimethyloxetane, 3-methyloxetane, alkyloxetane such as 3,3-dimethyloxetane, 3-methyl-3-methoxymethyloxetane, 3,3- '-di(trifluoromethyl)perfluoxetane, 2-chloromethyloxetane, 3,3-bis(chloromethyl)oxetane, biphenyl type oxetane, products of Toagosei Co., Ltd. "OXT-101", “OXT-121" etc.
- benzoxazine compound refers to a compound having two or more dihydrobenzoxazine rings in one molecule.
- benzoxazine compounds include "Bisphenol F-type benzoxazine BF-BXZ” and "Bisphenol S-type benzoxazine BS-BXZ” manufactured by Konishi Chemical Co., Ltd., and the like.
- Examples of compounds having a polymerizable unsaturated group include vinyl compounds such as ethylene, propylene, styrene, divinylbenzene, divinylbiphenyl; methyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl ( Monovalent meth)acrylate, polypropylene glycol di(meth)acrylate, trimethylolpropane di(meth)acrylate, trimethylolpropane tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol hexa(meth)acrylate, etc. or polyhydric alcohol (meth)acrylates; epoxy (meth)acrylates such as bisphenol A type epoxy (meth)acrylate and bisphenol F type epoxy (meth)acrylate; benzocyclobutene resin and the like.
- vinyl compounds such as ethylene, propylene, styrene, divinylbenzene
- the curable composition of the present embodiment preferably further contains an inorganic filler from the viewpoint of further improving the low thermal expansion properties of the obtained cured product.
- inorganic fillers include silica, silicon compounds (e.g., white carbon), metal oxides (e.g., alumina, titanium white, titanium oxide, barium titanate, zinc oxide, magnesium oxide, zirconium oxide, etc.), metals Nitrides (e.g., boron nitride, agglomerated boron nitride, silicon nitride, aluminum nitride, etc.), metal sulfates (e.g., barium sulfate, etc.), metal hydroxides (e.g., aluminum hydroxide, aluminum hydroxide heat-treated products (e.g., , aluminum hydroxide heat-treated to partially reduce the water of crystallization), boehmite, magnesium hydroxide, etc.), zinc compounds (e.g., zinc borate, zinc stannate, etc.), clay, kaolin, talc, calcination Clay, calcined kaolin, calcined talc, mica, E-
- the inorganic filler is silica, aluminum hydroxide, alumina, boehmite, boron nitride, aluminum nitride, titanium oxide, barium titanate, magnesium oxide, from the viewpoint of further improving the low thermal expansion of the resulting cured product. , and magnesium hydroxide, and more preferably silica.
- silica examples include natural silica, fused silica, synthetic silica, aerosil, and hollow silica. These silicas are used singly or in combination of two or more. Among these, fused silica is preferable because it can be suitably dispersed in the curable composition.
- the content of the inorganic filler is the thermosetting compound (D), the epoxy resin (E), and the cyanate ester compound. It is preferably 50 to 350 parts by mass, more preferably 100 to 300 parts by mass, based on 100 parts by mass in total with (F).
- the curable composition of this embodiment may further contain a silane coupling agent.
- the curable composition contains a silane coupling agent, the dispersibility of the inorganic filler is further improved, and the adhesive strength between each component contained in the curable composition and the substrate described later is further improved. There is a tendency.
- the silane coupling agent is not particularly limited, and includes silane coupling agents that are generally used for surface treatment of inorganic substances.
- silane coupling agents that are generally used for surface treatment of inorganic substances.
- aminosilane compounds eg, ⁇ -aminopropyltriethoxysilane, N- ⁇ -(aminoethyl)- ⁇ -aminopropyltrimethoxysilane, etc.
- epoxysilane compounds eg, ⁇ -glycidoxypropyltrimethoxysilane, silane, etc.
- acrylsilane compounds eg, ⁇ -acryloxypropyltrimethoxysilane, etc.
- cationic silane compounds eg, N- ⁇ -(N-vinylbenzylaminoethyl)- ⁇ -aminopropyltrimethoxysilane, hydrochloride, etc.
- styrylsilane-based compounds e.g, phenyls
- a silane coupling agent is used individually by 1 type or in combination of 2 or more types.
- the silane coupling agent is preferably an epoxysilane compound.
- epoxysilane compounds include Shin-Etsu Chemical Co., Ltd. products "KBM-403", “KBM-303", “KBM-402”, and "KBE-403".
- the content of the silane coupling agent is not particularly limited, but is 0.1 with respect to 100 parts by mass in total of the thermosetting compound (D), the epoxy resin (E), and the cyanate ester compound (F). It may be up to 10 parts by mass.
- the curable composition of this embodiment may further contain a wetting and dispersing agent.
- the curable composition tends to further improve the dispersibility of the inorganic filler by containing a wetting and dispersing agent.
- any known dispersing agent used to disperse the filler may be used. 161, BYK-W996, W9010, W903 and the like.
- the content of the wetting and dispersing agent is not particularly limited, but is 0.5 parts by mass with respect to a total of 100 parts by mass of the thermosetting compound (D), the epoxy resin (E), and the cyanate ester compound (F). parts or more and 5.0 parts by mass or less.
- the curable composition of this embodiment may further contain a solvent.
- a solvent By containing a solvent, the curable composition tends to have a lower viscosity during preparation of the curable composition, further improve handling properties, and further improve the impregnation of the substrate.
- the solvent is not particularly limited as long as it can dissolve part or all of each component in the curable composition.
- examples thereof include ketones (acetone, methyl ethyl ketone, etc.), aromatic hydrocarbons (eg, toluene, xylene, etc.), amides (eg, dimethylformaldehyde, etc.), propylene glycol monomethyl ether and acetate thereof. These solvents are used singly or in combination of two or more.
- the method for producing the curable composition of the present embodiment is not particularly limited, and includes, for example, a method of collectively or sequentially blending each component described above with a solvent and stirring the mixture. At this time, in order to uniformly dissolve or disperse each component, known treatments such as stirring, mixing, and kneading are used.
- the curable composition of the present embodiment can be suitably used as a cured product, resin sheet, prepreg, laminate, metal foil-clad laminate, and printed wiring board. These will be described below.
- a cured product is obtained by curing the curable composition of the present embodiment.
- the method for producing the cured product is not particularly limited.
- the curable composition of the present embodiment is melted or dissolved in a solvent, poured into a mold, and cured under normal conditions using heat or light. can be obtained by
- the curing temperature is preferably in the range of 120 to 300° C. from the viewpoint of efficient curing and prevention of deterioration of the resulting cured product.
- the resin sheet of this embodiment has a support and a resin layer disposed on one side or both sides of the support, and the resin layer contains the curable composition of this embodiment.
- the resin sheet may be formed, for example, by coating the curable composition of the present embodiment on one side or both sides of a support.
- a resin sheet can be produced, for example, by directly applying the curable composition of the present embodiment onto a support such as a metal foil or a film and drying it.
- the support for example, known ones used for various printed wiring board materials can be used, and resin films or metal foils are preferable.
- resin films and metal foils include resin films such as polyimide film, polyamide film, polyester film, polyethylene terephthalate (PET) film, polybutylene terephthalate (PBT) film, polypropylene (PP) film, polyethylene (PE) film, and metal foils such as aluminum foil, copper foil and gold foil.
- the support is preferably an electrolytic copper foil or a PET film.
- a resin sheet can be obtained, for example, by applying the curable composition of the present embodiment to a support and then semi-curing it (to B-stage).
- a method for producing a resin sheet is generally preferably a method for producing a composite of a B-stage resin and a support. Specifically, for example, after the curable composition is applied to a support such as a copper foil, it is semi-cured by a method of heating for 1 to 60 minutes in a dryer at 100 to 200 ° C. to produce a resin sheet. and methods to do so.
- the amount of the curable composition adhered to the support is preferably in the range of 1.0 to 300 ⁇ m in terms of resin thickness of the resin sheet.
- a resin sheet can be used as a build-up material for a printed wiring board.
- the prepreg of this embodiment includes a substrate and the curable composition of this embodiment impregnated or applied to the substrate.
- the method for forming the prepreg may be a known method. Specifically, after impregnating or applying the curable composition of the present embodiment to a substrate, the substrate is dried by heating at 100 to 200°C. It can be obtained by semi-curing (to B stage).
- the prepreg of the present embodiment also includes the form of a cured product obtained by thermally curing a semi-cured prepreg under conditions of a heating temperature of 180 to 230° C. and a heating time of 60 to 180 minutes.
- the content of the curable composition in the prepreg is preferably 30 to 90% by volume, more preferably 35 to 85% by volume, and still more preferably 40% by volume in terms of the solid content of the prepreg with respect to the total amount of the prepreg. ⁇ 80% by volume.
- the solid content of the prepreg as used herein refers to a component obtained by removing the solvent from the prepreg.
- the filler is included in the solid content of the prepreg.
- the base material examples include known base materials used as materials for various printed wiring boards.
- glass substrates inorganic substrates other than glass (for example, inorganic substrates composed of inorganic fibers other than glass such as quartz), organic substrates (for example, wholly aromatic polyamide, polyester, polyparaphenylene benzoxazole , an organic base material composed of organic fibers such as polyimide), and the like.
- organic substrates for example, wholly aromatic polyamide, polyester, polyparaphenylene benzoxazole , an organic base material composed of organic fibers such as polyimide
- a glass substrate is preferable from the viewpoint of being more excellent in dimensional stability under heating.
- Fibers constituting the glass substrate include, for example, E glass, D glass, S glass, T glass, Q glass, L glass, NE glass, HME glass, and the like.
- the fibers that make up the glass substrate are made of E glass, D glass, S glass, T glass, Q glass, L glass, NE glass, and HME glass, from the viewpoint of being more excellent in strength and low water absorption.
- One or more fibers selected from the group are preferred.
- Examples of the form of the base material include woven fabric, nonwoven fabric, roving, chopped strand mat, surfacing mat, and the like.
- the weaving method of the woven fabric is not particularly limited, but for example, plain weave, Nanako weave, twill weave, etc. are known, and it is possible to appropriately select and use from these known ones depending on the intended use and performance. .
- glass woven fabrics surface-treated with a silane coupling agent or the like are preferably used.
- the thickness and weight of the base material are preferably about 0.01 to 0.1 mm.
- the metal foil-clad laminate includes a laminate formed using the prepreg of the present embodiment, and metal foil disposed on one side or both sides of the laminate. Also, the laminate may be formed using the resin sheet of the present embodiment. That is, the laminate may be formed of one resin sheet or prepreg, or may be formed of a plurality of resin sheets and/or prepregs.
- the metal foil may be any metal foil used for various printed wiring board materials, and examples include metal foils such as copper and aluminum. Copper foils include rolled copper foils, electrolytic copper foils, and the like.
- the thickness of the conductor layer is, for example, 1 to 70 ⁇ m, preferably 1.5 to 35 ⁇ m.
- the molding method and molding conditions for the metal foil-clad laminate are not particularly limited, and general techniques and conditions for printed wiring board laminates and multilayer boards can be applied.
- a multistage press machine, a multistage vacuum press machine, a continuous molding machine, an autoclave molding machine, or the like can be used when molding a laminate (laminate described above) or a metal foil-clad laminate.
- the temperature is 100 to 300° C.
- the pressure is 2 to 100 kgf/cm 2
- the heating time is 0.05 to 5. Time ranges are common.
- post-curing can be performed at a temperature of 150-300°C.
- the temperature is preferably 200 to 250° C.
- the pressure is 10 to 40 kgf/cm 2
- the heating time is 80 to 130 minutes, from the viewpoint of sufficiently accelerating the curing of the prepreg. More preferably, the pressure is 25 to 35 kgf/cm 2 and the heating time is 90 to 120 minutes.
- the printed wiring board of this embodiment has an insulating layer and a conductor layer formed on one side or both sides of the insulating layer, and the insulating layer contains a cured product of the curable composition of this embodiment.
- the insulating layer is preferably formed from the resin sheet and/or prepreg of the present embodiment.
- a printed wiring board can be formed, for example, by etching a metal foil of a metal foil-clad laminate into a predetermined wiring pattern to form a conductor layer.
- a printed wiring board can be manufactured, for example, by the following method. First, a metal foil clad laminate is prepared. An inner layer board having a conductor layer (inner layer circuit) is produced by etching the metal foil of the metal foil clad laminate into a predetermined wiring pattern. Next, on the surface of the conductor layer (inner layer circuit) of the inner layer substrate, a predetermined number of prepregs and a metal foil for the outer layer circuit are laminated in this order, and integrally molded (lamination molding) by heating and pressing. get a body The laminate molding method and molding conditions are the same as the laminate molding method and molding conditions for the laminate and the metal foil-clad laminate described above.
- the laminate is perforated for through holes and via holes, and the wall surfaces of the holes thus formed are plated with a metal film for conducting the conductor layer (inner layer circuit) and the metal foil for the outer layer circuit.
- the metal foil for the outer layer circuit is etched into a predetermined wiring pattern to form an outer layer substrate having a conductor layer (outer layer circuit). A printed wiring board is thus manufactured.
- a printed wiring board may be produced by forming a conductor layer that becomes a circuit on the insulating layer. At this time, an electroless plating technique can be used to form the conductor layer.
- the weight average molecular weight Mw of the obtained polymer (D1) was measured as follows. 20 ⁇ L of a solution containing 0.5 g of a solution (solid content: 50% by mass) containing the polymer (D1), which is the thermosetting compound (D), dissolved in 2 g of tetrahydrofuran (THF) was subjected to high-performance liquid chromatography (Shimadzu Corporation). Factory, pump: LC-20AD) and analyzed.
- the columns were Shodex (registered trademark) GPC KF-804 (trade name, length 30 cm x inner diameter 8 mm) manufactured by Showa Denko K.K., Shodex (registered trademark) GPC KF-803 (trade name, length 30 cm x inner diameter 8 mm).
- Solution 1 was poured into a mixture of 1205.9 g of water over 30 minutes while maintaining the liquid temperature at -2 to -0.5°C under stirring. After pouring solution 1, the mixture was stirred at the same temperature for 30 minutes. I ordered over. After pouring solution 2, the mixture was stirred at the same temperature for 30 minutes to complete the reaction. After that, the reaction liquid was allowed to stand to separate the organic phase and the aqueous phase.
- the resulting organic phase was washed 5 times with 1300 g of water.
- the electric conductivity of the wastewater after the fifth washing was 5 ⁇ S/cm, and it was confirmed that the ionic compounds that could be removed by washing with water were sufficiently removed.
- the organic phase after washing with water is concentrated under reduced pressure, and finally concentrated to dryness at 90° C. for 1 hour to obtain the desired 1-naphthol aralkyl cyanate ester compound (SN495V-CN, cyanate group (functional group) equivalent: 261 g/eq.) (orange viscous) 331 g were obtained.
- the infrared absorption spectrum of the obtained SN495V-CN showed absorption at 2250 cm -1 (cyanate ester group) and no absorption of hydroxy group.
- Example 1 (Production of polymer (D1)) In a three-necked flask equipped with a thermometer and a Dimroth, 5.0 parts by mass of diallyl bisphenol A (DABPA (trade name), Daiwa Kasei Kogyo Co., Ltd.), biscresol fluorene (BCF (trade name), Osaka Gas Chemical Co., Ltd.) ) 5.4 parts by mass, epoxy-modified silicone b1 (X-22-163 (trade name), Shin-Etsu Chemical Co., Ltd., functional group equivalent 200 g / mol) 3.7 parts by mass, epoxy-modified silicone b2 (KF-105 (trade name), Shin-Etsu Chemical Co., Ltd., functional group equivalent 490 g / mol) 11.0 parts by weight, biphenyl type epoxy resin c1 (YL-6121H (trade name), Mitsubishi Chemical Corporation) 4.9 parts by weight , 30 parts by mass of propylene glycol monomethyl ether acetate (DOB PA (
- diallyl bisphenol A corresponds to "alkenylphenol A”
- epoxy-modified silicone b1 and epoxy-modified silicone b2 correspond to “epoxy-modified silicone B”
- biphenyl type epoxy resin c1 corresponds to "epoxy compound C”. Equivalent to.
- the polymer (D1) contains a structural unit derived from alkenylphenol A (structural unit A), a structural unit derived from epoxy-modified silicone B (structural unit B), and a structural unit derived from epoxy compound C (structural unit C) was included.
- the content of the structural unit B with respect to the polymer (D1) was 48.8% by mass.
- the content of structural unit C with respect to the total amount of structural unit B and structural unit C was 25% by mass.
- the weight average molecular weight (Mw) of the polymer (D1) was 12,000 in terms of polystyrene in the GPC method as a result of measurement by the method described above.
- Example 2 In the production of the prepreg, 12 parts by mass of a phenol novolac type cyanate ester compound (PT-30 (trade name)) was used instead of 14 parts by mass, and a naphthalene cresol novolac type epoxy resin (HP-9540 (trade name)) was used. ) was used instead of 36 parts by mass, in the same manner as in Example 1 to obtain a prepreg having a solid content (including filler) of 58.2% by volume. rice field. In addition, in the varnish (curable composition), the functional group equivalent ratio between the cyanate ester compound (F) and the epoxy resin (E) was 0.61. Using the obtained prepreg, in the same manner as in Example 1, a metal foil-clad laminate (double-sided copper-clad laminate) having an insulating layer derived from the laminate and having a thickness of 0.2 mm was produced.
- PT-30 phenol novolac type cyanate ester compound
- HP-9540 trade name
- Example 3 In the production of the prepreg, 10 parts by mass of a phenol novolak type cyanate ester compound (PT-30 (trade name)) was used instead of 14 parts by mass, and a naphthalene cresol novolac type epoxy resin (HP-9540 (trade name)) was used. ) was used instead of 36 parts by mass of 40 parts by mass, in the same manner as in Example 1 to obtain a prepreg having a solid content (including filler) of 58.2% by volume of the curable composition. rice field. In addition, in the varnish (curable composition), the functional group equivalent ratio between the cyanate ester compound (F) and the epoxy resin (E) was 0.48. Using the obtained prepreg, in the same manner as in Example 1, a metal foil-clad laminate (double-sided copper-clad laminate) having an insulating layer derived from the laminate and having a thickness of 0.2 mm was produced.
- PT-30 phenol novolak type cyanate ester compound
- HP-9540 trade name
- Example 4 In the production of the prepreg, the 1-naphthol aralkyl cyanate ester compound (cyanate group (functional group ) Equivalent: 261 g/eq., SN495V-CN) 20 parts by mass, and 30 parts by mass of naphthalene cresol novolac type epoxy resin (HP-9540 (trade name)) instead of 36 parts by mass , in the same manner as in Example 1 to obtain a varnish (curable composition).
- the functional group equivalent ratio between the cyanate ester compound (F) and the epoxy resin (E) was 0.62.
- the obtained varnish is impregnated and coated on S glass fiber (T2116 (trade name), Nittobo Co., Ltd., thickness 100 ⁇ m), dried by heating at 155 ° C. for 5 minutes, and the solid content of the curable composition (filling A prepreg with a content of 58.2% by volume (including the material) was obtained.
- S glass fiber T2116 (trade name), Nittobo Co., Ltd., thickness 100 ⁇ m
- the solid content of the curable composition filling A prepreg with a content of 58.2% by volume (including the material) was obtained.
- a metal foil-clad laminate double-sided copper-clad laminate having an insulating layer derived from the laminate and having a thickness of 0.2 mm was produced.
- Example 5 In the production of the prepreg, 18 parts by mass of the 1-naphthol aralkyl cyanate ester compound (SN495V-CN) obtained in Synthesis Example 1 was used in place of 14 parts by mass of the phenol novolak cyanate compound (PT-30 (trade name)). Parts by mass were used, and 32 parts by mass of naphthalene cresol novolac type epoxy resin (HP-9540 (trade name)) was used instead of 36 parts by mass. A varnish (curable composition) was obtained in the same manner. The functional group equivalent ratio between the cyanate ester compound (F) and the epoxy resin (E) was 0.53.
- the obtained varnish is impregnated and coated on S glass fiber (T2116 (trade name), Nittobo Co., Ltd., thickness 100 ⁇ m), dried by heating at 155 ° C. for 5 minutes, and the solid content of the curable composition (filling A prepreg with a content of 58.2% by volume (including the material) was obtained.
- S glass fiber T2116 (trade name), Nittobo Co., Ltd., thickness 100 ⁇ m
- the solid content of the curable composition filling A prepreg with a content of 58.2% by volume (including the material) was obtained.
- a metal foil-clad laminate double-sided copper-clad laminate having an insulating layer derived from the laminate and having a thickness of 0.2 mm was produced.
- Example 6 In the production of the prepreg, 15 parts by mass of the 1-naphthol aralkyl cyanate ester compound (SN495V-CN) obtained in Synthesis Example 1 was used in place of 14 parts by mass of the phenol novolak cyanate compound (PT-30 (trade name)). Parts by mass were used, and 35 parts by mass of naphthalene cresol novolac type epoxy resin (HP-9540 (trade name)) was used instead of 36 parts by mass. A varnish (curable composition) was obtained in the same manner. The functional group equivalent ratio between the cyanate ester compound (F) and the epoxy resin (E) was 0.40.
- the obtained varnish is impregnated and coated on S glass fiber (T2116 (trade name), Nittobo Co., Ltd., thickness 100 ⁇ m), dried by heating at 155 ° C. for 5 minutes, and the solid content of the curable composition (filling A prepreg with a content of 58.2% by volume (including the material) was obtained.
- S glass fiber T2116 (trade name), Nittobo Co., Ltd., thickness 100 ⁇ m
- the solid content of the curable composition filling A prepreg with a content of 58.2% by volume (including the material) was obtained.
- a metal foil-clad laminate double-sided copper-clad laminate having an insulating layer derived from the laminate and having a thickness of 0.2 mm was produced.
- Example 7 In the production of the prepreg, 12 parts of the 1-naphthol aralkyl cyanate ester compound (SN495V-CN) obtained in Synthesis Example 1 was used in place of 14 parts by mass of the phenol novolac cyanate ester compound (PT-30 (trade name)). Parts by mass were used, and 38 parts by mass of naphthalene cresol novolac type epoxy resin (HP-9540 (trade name)) was used instead of 36 parts by mass. A varnish (curable composition) was obtained in the same manner. The functional group equivalent ratio between the cyanate ester compound (F) and the epoxy resin (E) was 0.30.
- the obtained varnish is impregnated and coated on S glass fiber (T2116 (trade name), Nittobo Co., Ltd., thickness 100 ⁇ m), dried by heating at 155 ° C. for 5 minutes, and the solid content of the curable composition (filling A prepreg with a content of 58.2% by volume (including the material) was obtained.
- S glass fiber T2116 (trade name), Nittobo Co., Ltd., thickness 100 ⁇ m
- the solid content of the curable composition filling A prepreg with a content of 58.2% by volume (including the material) was obtained.
- a metal foil-clad laminate double-sided copper-clad laminate having an insulating layer derived from the laminate and having a thickness of 0.2 mm was produced.
- Example 8 (Manufacturing of prepregs and metal foil-clad laminates) 16 parts by mass of the 1-naphthol aralkyl-type cyanate ester compound (SN495V-CN) obtained in Synthesis Example 1 was added to 30 parts by mass (in terms of solid content) of the solution containing the polymer (D1) obtained in Example 1.
- naphthalene cresol novolac type epoxy resin HP-9540 (trade name)) 32.5 parts by mass, novolac type maleimide compound (BMI-2300 (trade name)) 16 parts by mass, maleimide compound (BMI-80 (trade name) )) 5.5 parts by mass, slurry silica (SC-2050MB (trade name)) 200 parts by mass, epoxysilane coupling agent (KBM-403 (trade name)) 5 parts by mass, and a wetting and dispersing agent (DISPERBYK- 161 (trade name)) to obtain a varnish (curable composition).
- the functional group equivalent ratio between the cyanate ester compound (F) and the epoxy resin (E) was 0.46.
- the obtained varnish is impregnated and coated on S glass fiber (T2116 (trade name), Nittobo Co., Ltd., thickness 100 ⁇ m), dried by heating at 155 ° C. for 5 minutes, and the solid content of the curable composition (filling A prepreg with a content of 58.2% by volume (including the material) was obtained.
- S glass fiber T2116 (trade name), Nittobo Co., Ltd., thickness 100 ⁇ m
- the solid content of the curable composition filling A prepreg with a content of 58.2% by volume (including the material) was obtained.
- a metal foil-clad laminate double-sided copper-clad laminate having an insulating layer derived from the laminate and having a thickness of 0.2 mm was produced.
- Example 9 Manufacturing of prepregs and metal foil-clad laminates 15 parts by mass of the 1-naphtholaralkyl-type cyanate ester compound (SN495V-CN) obtained in Synthesis Example 1 was added to 30 parts by mass (in terms of solid content) of the solution containing the polymer (D1) obtained in Example 1.
- naphthalene cresol novolac type epoxy resin HP-9540 (trade name) 25 parts by mass
- novolac type maleimide compound BMI-2300 (trade name)) 22.5 parts by mass
- maleimide compound BMI-80 (trade name) )
- slurry silica SC-2050MB (trade name)) 140 parts by mass
- epoxysilane coupling agent KBM-403 (trade name)) 5 parts by mass
- DISPERBYK- 161 trade name
- the functional group equivalent ratio between the cyanate ester compound (F) and the epoxy resin (E) was 0.56.
- the obtained varnish is impregnated and coated on S glass fiber (T2116 (trade name), Nittobo Co., Ltd., thickness 100 ⁇ m), dried by heating at 165 ° C. for 5 minutes, and the solid content of the curable composition (filling A prepreg with a content of 58.2% by volume (including the material) was obtained.
- S glass fiber T2116 (trade name), Nittobo Co., Ltd., thickness 100 ⁇ m
- the solid content of the curable composition filling A prepreg with a content of 58.2% by volume (including the material) was obtained.
- a metal foil-clad laminate double-sided copper-clad laminate having an insulating layer derived from the laminate and having a thickness of 0.2 mm was produced.
- Example 10 Manufacturing of prepregs and metal foil-clad laminates 22 parts by mass of the 1-naphtholaralkyl-type cyanate ester compound (SN495V-CN) obtained in Synthesis Example 1 was added to 30 parts by mass (in terms of solid content) of the solution containing the polymer (D1) obtained in Example 1.
- naphthalene cresol novolac type epoxy resin (HP-9540 (trade name)) 38 parts by mass, novolac type maleimide compound (BMI-2300 (trade name)) 7.5 parts by mass, maleimide compound (BMI-80 (trade name) )) 2.5 parts by mass, slurry silica (SC-2050MB (trade name)) 140 parts by mass, epoxysilane coupling agent (KBM-403 (trade name)) 5 parts by mass, and a wetting and dispersing agent (DISPERBYK- 161 (trade name)) to obtain a varnish (curable composition).
- the functional group equivalent ratio between the cyanate ester compound (F) and the epoxy resin (E) was 0.54.
- the obtained varnish is impregnated and coated on S glass fiber (T2116 (trade name), Nittobo Co., Ltd., thickness 100 ⁇ m), dried by heating at 165 ° C. for 5 minutes, and the solid content of the curable composition (filling A prepreg with a content of 58.2% by volume (including the material) was obtained.
- S glass fiber T2116 (trade name), Nittobo Co., Ltd., thickness 100 ⁇ m
- the solid content of the curable composition filling A prepreg with a content of 58.2% by volume (including the material) was obtained.
- a metal foil-clad laminate double-sided copper-clad laminate having an insulating layer derived from the laminate and having a thickness of 0.2 mm was produced.
- Example 11 Manufacturing of prepregs and metal foil-clad laminates 18 parts by mass of the 1-naphtholaralkyl-type cyanate ester compound (SN495V-CN) obtained in Synthesis Example 1 was added to 30 parts by mass (in terms of solid content) of the solution containing the polymer (D1) obtained in Example 1.
- Naphthylene ether type epoxy resin (epoxy group (functional group) equivalent weight: 250 g / eq, HP-6000 (trade name), DIC Corporation) 32 parts by mass, and a novolac type maleimide compound (BMI-2300 (trade name) ), 5 parts by mass of a maleimide compound (BMI-80 (trade name)), 140 parts by mass of slurry silica (SC-2050MB (trade name)), and an epoxysilane coupling agent (KBM-403 (trade name) )))) and 1 part by mass of a wetting and dispersing agent (DISPERBYK-161 (trade name)) were mixed to obtain a varnish (curable composition).
- a novolac type maleimide compound (BMI-2300 (trade name) ), 5 parts by mass of a maleimide compound (BMI-80 (trade name)), 140 parts by mass of slurry silica (SC-2050MB (trade name)), and an epoxysilane coupling agent (KBM-403
- the functional group equivalent ratio between the cyanate ester compound (F) and the epoxy resin (E) was 0.54.
- the obtained varnish is impregnated and coated on S glass fiber (T2116 (trade name), Nittobo Co., Ltd., thickness 100 ⁇ m), dried by heating at 155 ° C. for 5 minutes, and the solid content of the curable composition (filling A prepreg with a content of 58.2% by volume (including the material) was obtained.
- a metal foil-clad laminate double-sided copper-clad laminate having an insulating layer derived from the laminate and having a thickness of 0.2 mm was produced.
- the obtained varnish is impregnated and coated on S glass fiber (T2116 (trade name), Nittobo Co., Ltd., thickness 100 ⁇ m), dried by heating at 165 ° C. for 5 minutes, and the solid content of the curable composition (filling A prepreg with a content of 58.2% by volume (including the material) was obtained.
- S glass fiber T2116 (trade name), Nittobo Co., Ltd., thickness 100 ⁇ m
- the solid content of the curable composition filling A prepreg with a content of 58.2% by volume (including the material) was obtained.
- a metal foil-clad laminate double-sided copper-clad laminate having an insulating layer derived from the laminate and having a thickness of 0.2 mm was produced.
- CTE Coefficient of thermal expansion
- the linear thermal expansion coefficient was measured for the insulating layer derived from the laminate in the metal foil-clad laminate. Specifically, after cutting the obtained metal foil clad laminate into a size of 6 mm ⁇ 10 mm ⁇ 0.22 mm with a dicing saw, the copper foil on both sides is removed by etching, and then heated in a constant temperature bath at 220 ° C. for 2 hours. to remove the stresses due to molding. After that, using a thermal expansion measuring device (L75H type horizontal dilatometer manufactured by Linseis), the temperature was raised from 40 ° C. to 320 ° C. at 10 ° C. per minute, and the coefficient of linear thermal expansion (CTE) at 60 ° C. to 260 ° C. (ppm/°C) was measured.
- CTE coefficient of linear thermal expansion
- the curable composition of the present invention can simultaneously achieve low thermal expansion, heat resistance (high glass transition temperature), and high peel strength (copper foil adhesion). Therefore, the curable composition of the present invention can be used, for example, for cured products, prepregs, film-like underfill materials, resin sheets, laminates, build-up materials, metal foil-clad laminates, printed wiring boards, and fiber-reinforced composite materials. It can be suitably used as a raw material or in the manufacture of semiconductor devices.
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Abstract
Description
[1]少なくとも、アルケニルフェノール(A)に由来する構成単位と、エポキシ変性シリコーン(B)に由来する構成単位と、前記エポキシ変性シリコーン(B)以外のエポキシ化合物(C)に由来する構成単位と、を含む熱硬化性化合物(D)と、エポキシ樹脂(E)と、シアン酸エステル化合物(F)と、を含み、前記エポキシ樹脂(E)は、前記エポキシ変性シリコーン(B)と異なり、かつ、前記エポキシ化合物(C)と同一であっても異なっていてもよく、前記シアン酸エステル化合物(F)と、前記エポキシ樹脂(E)との官能基当量比(シアン酸エステル化合物(F)のシアネート基の当量/エポキシ樹脂(E)のエポキシ基の当量)が、0.25~0.85である、硬化性組成物。
前記熱硬化性化合物(D)の含有量が、前記熱硬化性化合物(D)と、前記エポキシ樹脂(E)と、前記シアン酸エステル化合物(F)との合計100質量部に対して、25~50質量部であり、前記エポキシ樹脂(E)と前記シアン酸エステル化合物(F)との合計の含有量が、前記熱硬化性化合物(D)と、前記エポキシ樹脂(E)と、前記シアン酸エステル化合物(F)との合計100質量部に対して、50~75質量部である、[1]~[9]のいずれかに記載の硬化性組成物。
前記熱硬化性化合物(D)と、前記エポキシ樹脂(E)と、前記シアン酸エステル化合物(F)との合計の含有量が、樹脂組成物中の樹脂固形分100質量部に対して、50~99質量部である、[1]~[12]のいずれかに記載の硬化性組成物。
本実施形態の硬化性組成物は、少なくとも、アルケニルフェノール(A)に由来する構成単位と、エポキシ変性シリコーン(B)に由来する構成単位と、前記エポキシ変性シリコーン(B)以外のエポキシ化合物(C)に由来する構成単位と、を含む熱硬化性化合物(D)と、エポキシ樹脂(E)と、シアン酸エステル化合物(F)と、を含み、前記エポキシ樹脂(E)は、前記エポキシ変性シリコーン(B)と異なり、かつ、前記エポキシ化合物(C)と同一であっても異なっていてもよく、前記シアン酸エステル化合物(F)と、前記エポキシ樹脂(E)との官能基当量比((シアン酸エステル化合物(F)のシアネート基の当量/エポキシ樹脂(E)のエポキシ基の当量)が、0.25~0.85である。
本実施形態の硬化性組成物において、後述のシアン酸エステル化合物(F)と、後述のエポキシ樹脂(E)との官能基当量比(シアン酸エステル化合物(F)のシアネート基の当量/エポキシ樹脂(E)のエポキシ基の当量)は、0.25~0.85である。官能基当量比が、前記範囲にあると、優れた低熱膨張性、優れた耐熱性、及び高いピール強度を同時に達せられる。官能基当量比は、より優れた、低熱膨張性、耐熱性、及びピール強度が得られることから、0.30~0.80であることが好ましく、0.40~0.70であることがより好ましい。また、官能基当量比が0.25未満であると、優れた、耐熱性、及びピール強度が得られ難くなる。一方、官能基当量比が0.85を超えると、低熱膨張性が得られ難くなる。
本実施形態の硬化性組成物は、少なくとも、アルケニルフェノール(A)に由来する構成単位と、エポキシ変性シリコーン(B)に由来する構成単位と、エポキシ変性シリコーン(B)以外のエポキシ化合物(C)に由来する構成単位と、を含む熱硬化性化合物(D)を含む。また、熱硬化性化合物(D)は、必要に応じて、アルケニルフェノール(A)以外のフェノール化合物(G)に由来する構成単位を更に含んでいてもよい。以下、各構成単位をそれぞれ構成単位A、B、C、及びGとも称する。なお、本明細書において、「アルケニルフェノール(A)に由来する構成単位」とは、熱硬化性化合物(D)中に、アルケニルフェノール(A)を重合させたことに由来する構成単位を含むことに加えて、同様の構成単位を与えうる反応等で形成した構成単位を含むこととする。本明細書において、「・・・に由来する構成単位」については、同様に解釈するものとする。熱硬化性化合物(D)を、特定の官能基当量比にてシアン酸エステル化合物(F)とエポキシ樹脂(E)と共に用いることにより、上述した反応誘起型相分離構造をより好適に制御することが可能となるため、硬化性組成物は、低熱膨張性、耐熱性、及び高いピール強度を同時に発現できる。熱硬化性化合物(D)は、1種単独で又は2種以上を適宜組み合わせて使用することができる。なお、アルケニルフェノール(A)、エポキシ変性シリコーン(B)、エポキシ化合物(C)、及びフェノール化合物(G)については、後述する。
熱硬化性化合物(D)は、シリコーン系化合物とのワニス相溶性に乏しい熱硬化性樹脂と混合した場合においても十分なワニス相溶性を発揮し得るため、少なくとも、アルケニルフェノール(A)と、エポキシ変性シリコーン(B)と、前記エポキシ変性シリコーン(B)以外のエポキシ化合物(C)と、を重合して得られる重合体(D1)であることが、好ましい。また、重合体(D1)は、少なくとも、アルケニルフェノール(A)と、エポキシ変性シリコーン(B)と、前記エポキシ変性シリコーン(B)以外のエポキシ化合物(C)と、フェノール化合物(G)とを重合して得られる重合体であることが、好ましい。
以下、重合体(D1)の合成に用いることができる各成分について説明する。
アルケニルフェノール(A)は、1つ以上のアルケニル基がフェノール性芳香環に直接結合した構造を有する化合物であれば特に限定されない。熱硬化性化合物(D)又は重合体(D1)は、アルケニルフェノール(A)由来の構成単位を含有することにより、反応誘起型相分離構造を好適に制御することが可能となるため、得られる硬化物は、優れた、低熱膨張性、耐熱性、及びピール強度を発現できる。
エポキシ変性シリコーン(B)は、エポキシ基含有基により変性されたシリコーン化合物または樹脂であれば特に限定されない。熱硬化性化合物(D)又は重合体(D1)は、エポキシ変性シリコーン(B)由来の構成単位を含有することにより、得られる硬化物は、優れた低熱膨張性及び耐薬品性を発現できる。
エポキシ化合物(C)は、エポキシ変性シリコーン(B)以外のエポキシ化合物であり、より具体的には、ポリシロキサン骨格を有しないエポキシ化合物である。熱硬化性化合物(D)又は重合体(D1)は、エポキシ化合物(C)由来の構成単位を含有することにより、得られる硬化物は、低熱膨張性、耐熱性、ピール強度、耐薬品性、及び絶縁信頼性に優れる。
ここで、Ar3におけるベンゼン環又はナフタレン環は、さらに一又は複数の置換基を有してもよく、当該置換基は、例えば、炭素数1~5のアルキル基やフェニル基等のグリシジルオキシ基以外の置換基であってもよく、
Ar4におけるベンゼン環、ナフタレン環又はビフェニル環は、さらに一又は複数の置換基を有してもよく、当該置換基は、例えば、炭素数1~5のアルキル基やフェニル基等のグリシジルオキシ基以外の置換基であってもよい。
熱硬化性化合物(D)又は重合体(D1)は、硬化性組成物が、より一層優れたワニス相溶性を有し、得られる硬化物の、耐熱性、及びピール強度がより優れる観点から、アルケニルフェノール(A)以外のフェノール化合物(G)由来の構成単位を含有することが好ましい。
熱硬化性化合物(D)又は重合体(D1)は、特に限定されないが、例えば、アルケニルフェノール(A)と、エポキシ変性シリコーン(B)と、エポキシ化合物(C)と、必要に応じてフェノール化合物(G)とを、後述の重合触媒の存在下にて反応させる工程により得られる。当該反応は、有機溶媒の存在下で行ってもよい。より具体的には、上記工程において、エポキシ変性シリコーン(B)及びエポキシ化合物(C)が有するエポキシ基とアルケニルフェノール(A)が有する水酸基との付加反応と、得られた付加反応物が有する水酸基とエポキシ変性シリコーン(B)及びエポキシ化合物(C)が有するエポキシ基との付加反応などが進行することで、熱硬化性化合物(D)又は重合体(D1)を得ることができる。
本実施形態の硬化性組成物は、エポキシ樹脂(E)を含む。エポキシ樹脂(E)は、エポキシ変性シリコーン(B)と異なるが、エポキシ化合物(C)とは同一であっても異なっていてもよい。熱硬化性化合物(D)と共に、特定の官能基当量比においてエポキシ樹脂(E)をシアン酸エステル化合物(F)と用いることにより、一層優れたワニス相溶性を有し、硬化物は、低熱膨張性、耐熱性、及び高ピール強度を同時に発現でき、耐薬品性及び絶縁信頼性を一層向上させることができる。エポキシ樹脂(E)は、1種単独で又は2種以上を適宜組み合わせて使用することができる。
ここで、Ar3におけるベンゼン環又はナフタレン環は、さらに一又は複数の置換基を有してもよく、当該置換基は、図示しないグリシジルオキシ基であってもよく、その他の置換基、例えば、炭素数1~5のアルキル基、フェニル基等であってもよく、
Ar4におけるベンゼン環、ナフタレン環、又はビフェニル環は、さらに一又は複数の置換基を有してもよく、当該置換基は、グリシジルオキシ基であってもよく、その他の置換基、例えば、炭素数1~5のアルキル基、フェニル基等であってもよい。
ここで、Ar3におけるベンゼン環又はナフタレン環は、さらに一又は複数の置換基を有してもよく、当該置換基は、例えば、炭素数1~5のアルキル基やフェニル基等のグリシジルオキシ基以外の置換基であってもよく、
Ar4におけるベンゼン環、ナフタレン環又はビフェニル環は、さらに一又は複数の置換基を有してもよく、当該置換基は、例えば、炭素数1~5のアルキル基やフェニル基等のグリシジルオキシ基以外の置換基であってもよい。
アラルキル型エポキシ樹脂としては、式(3a)においてAr3がナフタレン環であり、Ar4がベンゼン環である化合物(「ナフトールアラルキル型エポキシ樹脂」ともいう。)、及び式(3a)においてAr3がベンゼン環であり、Ar4がビフェニル環である化合物(「ビフェニルアラルキル型エポキシ樹脂」ともいう。)であることが好ましく、ビフェニルアラルキル型エポキシ樹脂であることがより好ましい。
ジシクロペンタジエン型エポキシ樹脂としては、特に制限されないが、例えば、式(3-5)で表される化合物が挙げられる。
他のエポキシ樹脂としては、特に限定されないが、ビスフェノール型エポキシ樹脂、トリスフェノールメタン型エポキシ樹脂、アントラセン型エポキシ樹脂、グリシジルエステル型エポキシ樹脂、ポリオール型エポキシ樹脂、イソシアヌレート環含有エポキシ樹脂、フルオレン型エポキシ樹脂、及びビスフェノールA型構造単位と炭化水素系構造単位からなるエポキシ樹脂等が挙げられる。
他のエポキシ樹脂としては、上記した中でも、一層優れたワニス相溶性を有し、得られる硬化物の、低熱膨張性、耐熱性、及びピール強度がより優れ、耐薬品性、及び絶縁信頼性を一層発現できる観点から、ビスフェノール型エポキシ樹脂を含むことができ、ビスフェノール型エポキシ樹脂としては、例えば、ジアリルビスフェノール型エポキシ樹脂(例えば、ジアリルビスフェノールA型エポキシ樹脂、ジアリルビスフェノールE型エポキシ樹脂、ジアリルビスフェノールF型エポキシ樹脂、ジアリルビスフェノールS型エポキシ樹脂等)等を用いることができる。
本実施形態の硬化性組成物は、シアン酸エステル化合物(F)を含む。熱硬化性化合物(D)と共に、特定の官能基当量比においてシアン酸エステル化合物(F)をエポキシ樹脂(E)とともに用いることにより、硬化物は、低熱膨張性、耐熱性、及び高ピール強度を同時に発現でき、耐薬品性を一層向上させることができる。シアン酸エステル化合物(F)は、1種単独で又は2種以上を適宜組み合わせて使用することができる。
本実施形態の硬化性組成物は、得られる硬化物の、低熱膨張性、耐熱性、及びピール強度がより一層優れ、耐薬品性をより一層向上できる観点から、マレイミド化合物を更に含有することが好ましい。マレイミド化合物は、1種単独で又は2種以上を適宜組み合わせて使用することができる。
本実施形態の硬化性組成物は、本実施形態の硬化性組成物における効果を阻害しない限り、フェノール化合物を更に含んでよい。フェノール化合物は、アルケニルフェノール(A)及びアルケニルフェノール(A)以外のフェノール化合物(G)と、それぞれ同一であっても異なっていてもよい。フェノール化合物は、1種単独で又は2種以上を適宜組み合わせて使用することができる。
アラルキル型フェノール樹脂としては、例えば、式(c2)で表される化合物が挙げられる。
本実施形態の硬化性組成物は、本実施形態の硬化性組成物における効果を阻害しない限り、アルケニル置換ナジイミド化合物を更に含んでよい。アルケニル置換ナジイミド化合物は、1種単独で又は2種以上を適宜組み合わせて使用することができる。
本実施形態の硬化性組成物は、本実施形態の硬化性組成物における効果を阻害しない限り、その他の樹脂を更に含んでもよい。その他の樹脂としては、例えば、オキセタン樹脂、ベンゾオキサジン化合物、及び重合可能な不飽和基を有する化合物等が挙げられる。これらの樹脂又は化合物は、1種単独で又は2種以上を適宜組み合わせて使用することができる。
本実施形態の硬化性組成物は、得られる硬化物の低熱膨張性を一層向上できる観点から、無機充填材を更に含有することが好ましい。
本実施形態の硬化性組成物は、シランカップリング剤を更に含有してもよい。硬化性組成物が、シランカップリング剤を含有することにより、無機充填材の分散性が一層向上し、硬化性組成物に含まれる各成分と、後述する基材との接着強度が一層向上する傾向にある。
本実施形態の硬化性組成物は、湿潤分散剤を更に含有してもよい。硬化性組成物は、湿潤分散剤を含有することにより、無機充填材の分散性が一層向上する傾向にある。
本実施形態の硬化性組成物は、溶剤を更に含有してもよい。硬化性組成物は、溶剤を含むことにより、硬化性組成物の調製時における粘度が下がり、ハンドリング性(取り扱い性)が一層向上し、基材への含浸性が一層向上する傾向にある。
本実施形態の硬化性組成物の製造方法としては、特に限定されるものではなく、例えば、上述した各成分を一括的に又は逐次的に溶剤に配合し、撹拌する方法が挙げられる。この際、各成分を均一に溶解又は分散せるために、撹拌、混合、混練処理等の公知の処理が用いられる。
本実施形態の硬化性組成物は、硬化物、樹脂シート、プリプレグ、積層板、金属箔張積層板、プリント配線板として、好適に用いることができる。以下、これらについて説明する。
硬化物は、本実施形態の硬化性組成物を硬化させて得られる。硬化物の製造方法としては、特に限定されず、例えば、本実施形態の硬化性組成物を溶融又は溶媒に溶解させた後、型内に流し込み、熱や光などを用いて通常の条件で硬化させることにより得ることができる。熱硬化の場合、硬化温度は、硬化が効率的に進み、かつ得られる硬化物の劣化を防止する観点から、120~300℃の範囲内が好ましい。
本実施形態の樹脂シートは、支持体と、支持体の片面又は両面に配された樹脂層と、を有し、樹脂層が、本実施形態の硬化性組成物を含む。樹脂シートは、例えば、本実施形態の硬化性組成物を支持体の片面又は両面に塗布することにより形成されたものであってもよい。樹脂シートは、例えば、金属箔やフィルム等の支持体に、直接、本実施形態の硬化性組成物を塗布及び乾燥して製造できる。
本実施形態のプリプレグは、基材と、基材に含浸又は塗布された、本実施形態の硬化性組成物とを含む。プリプレグの形成方法は、公知の方法であってもよく、具体的には、本実施形態の硬化性組成物を基材に含浸又は塗布させた後、100~200℃の条件にて加熱乾燥させることにより半硬化(Bステージ化)させることにより得られる。
金属箔張積層板は、本実施形態のプリプレグを用いて形成された積層体と、積層体の片面又は両面に配された金属箔と、を含む。また、積層体は、本実施形態の樹脂シートを用いて形成されてもよい。すなわち、該積層体は、1つの樹脂シート又はプリプレグで形成されていてよく、複数の樹脂シート及び/又はプリプレグで形成されていてよい。
本実施形態のプリント配線板は、絶縁層と、絶縁層の片面又は両面に形成された導体層と、を有し、絶縁層が、本実施形態の硬化性組成物の硬化物を含む。絶縁層は、本実施形態の樹脂シート及び/又はプリプレグより形成されることが好ましい。プリント配線板は、例えば、金属箔張積層板の金属箔を所定の配線パターンにエッチングして導体層とすることにより形成できる。
得られた重合体(D1)の重量平均分子量Mwを、次のようにして測定した。熱硬化性化合物(D)である重合体(D1)を含む溶液(固形分50質量%)0.5gを2gのテトラヒドロフラン(THF)に溶解させた溶液20μLを高速液体クロマトグラフィー((株)島津製作所、ポンプ:LC-20AD)に注入して分析した。カラムは、昭和電工(株)製Shodex(登録商標) GPC KF-804(商品名、長さ30cm×内径8mm)、Shodex(登録商標) GPC KF-803(商品名、長さ30cm×内径8mm)、Shodex(登録商標) GPC KF-802(商品名、長さ30cm×内径8mm)、Shodex(登録商標) GPC KF-801(商品名、長さ30cm×内径8mm)、の計4本使用し、移動相としてTHF(溶媒)を用いて、流速を1mL/minとし、検出器はRID-10A(示差屈折率検出器、(株)島津製作所)を用いた。重量平均分子量Mwは、GPC法により標準ポリスチレンを標準物質として求めた。
上記式(2b)におけるR2aがすべて水素原子であり、mが1~10の整数であるα-ナフトールアラルキル型フェノール樹脂(SN495V、OH基当量:236g/eq.、新日鐵化学(株)製)300g(OH基換算1.28mol)及びトリエチルアミン194.6g(1.92mol)(ヒドロキシ基1molに対して1.5mol)をジクロロメタン1800gに溶解させ、これを溶液1とした。塩化シアン125.9g(2.05mol)(ヒドロキシ基1molに対して1.6mol)、ジクロロメタン293.8g、36%塩酸194.5g(1.92mol)(ヒドロキシ基1molに対して1.5mol)、水1205.9gの混合物を、撹拌下、液温-2~-0.5℃に保ちながら、溶液1を30分かけて注下した。溶液1注下終了後、同温度にて30分撹拌した後、トリエチルアミン65g(0.64mol)(ヒドロキシ基1molに対して0.5mol)をジクロロメタン65gに溶解させた溶液(溶液2)を10分かけて注下した。溶液2注下終了後、同温度にて30分撹拌して反応を完結させた。その後、反応液を静置して有機相と水相を分離した。得られた有機相を水1300gで5回洗浄した。水洗5回目の廃水の電気伝導度は5μS/cmであり、水による洗浄により除けるイオン性化合物は十分に除去できていることを確認した。水洗後の有機相を減圧下で濃縮し、最終的に90℃で1時間濃縮乾固させて目的とする1-ナフトールアラルキル型シアン酸エステル化合物(SN495V-CN、シアネート基(官能基)当量:261g/eq.)(橙色粘性物)331gを得た。得られたSN495V-CNの赤外吸収スペクトルは2250cm-1(シアン酸エステル基)の吸収を示し、且つ、ヒドロキシ基の吸収は示さなかった。
(重合体(D1)の製造)
温度計、ジムロートを取り付けた三口フラスコに、ジアリルビスフェノールA(DABPA(商品名)、大和化成工業(株))5.0質量部、ビスクレゾールフルオレン(BCF(商品名)、大阪ガス化学(株))5.4質量部、エポキシ変性シリコーンb1(X-22-163(商品名)、信越化学工業(株)、官能基当量200g/mol)3.7質量部、エポキシ変性シリコーンb2(KF-105(商品名)、信越化学工業(株)、官能基当量490g/mol)11.0質量部、ビフェニル型エポキシ樹脂c1(YL-6121H(商品名)、三菱ケミカル(株))4.9質量部、溶媒としてプロピレングリコールモノメチルエーテルアセテート(DOWANOL PMA(商品名)、ダウ・ケミカル日本(株))30質量部を加え、オイルバスにて120℃まで加熱撹拌した。原料が溶媒に溶解したことを確認し、イミダゾール触媒(TBZ(商品名)、四国化成工業(株))0.3質量部を加え140℃まで昇温したのち、5時間撹拌し、冷却後、熱硬化性化合物(D)である重合体(D1)を含む溶液(固形分50質量%)を得た。
重合体(D1)に対する構成単位Bの含有量は、48.8質量%であった。
構成単位B及び構成単位Cの総量に対する構成単位Cの含有量は、25質量%であった。
重合体(D1)の重量平均分子量(Mw)は、前記の方法で測定した結果、GPC法におけるポリスチレン換算で12,000であった。
得られた重合体(D1)を含む溶液30質量部(固形分換算)に、フェノールノボラック型シアン酸エステル化合物(シアネート基(官能基)当量:127g/eq、Primaset PT-30(商品名)、ロンザジャパン(株)製)14質量部と、ナフタレンクレゾールノボラック型エポキシ樹脂(エポキシ基(官能基)当量:244g/eq、HP-9540(商品名)、DIC(株))36質量部と、ノボラック型マレイミド化合物(マレイミド基(官能基)当量:275g/eq、BMI-2300(商品名)、大和化成工業(株))15質量部と、マレイミド化合物(マレイミド基(官能基)当量:285g/eq、BMI-80(商品名)、ケイ・アイ化成(株))5質量部と、スラリーシリカ(SC-2050MB(商品名)、アドマテックス(株))140質量部と、エポキシシランカップリング剤(KBM-403(商品名)、東レ・ダウコーティング(株))5質量部と、湿潤分散剤(DISPERBYK-161(商品名)、ビックケミー・ジャパン(株))1質量部とを混合して、ワニス(硬化性組成物)を得た。シアン酸エステル化合物(F)と、エポキシ樹脂(E)との官能基当量比は、0.75であった。
得られたワニスをSガラス繊維(T2116(商品名)、(株)日東紡、厚さ100μm)に含浸塗工し、165℃で5分間加熱乾燥して、硬化性組成物の固形分(充填材を含む)の含有量58.2体積%であるプリプレグを得た。
得られたプリプレグをそれぞれ2枚重ね合わせ、積層体とし、この積層体の両面に12μm厚の電解銅箔(3EC-VLP(商品名)、三井金属鉱業(株)製)を配置し、圧力30kgf/cm2、230℃、及び100分間の真空プレスを行い積層成形することで、積層体由来の絶縁層の厚さが0.2mmの金属箔張積層板(両面銅張積層板)を作製した。
プリプレグの製造において、フェノールノボラック型シアン酸エステル化合物(PT-30(商品名))を14質量部の代わりに12質量部用いて、かつ、ナフタレンクレゾールノボラック型エポキシ樹脂(HP-9540(商品名))を36質量部の代わりに38質量部用いた以外は、実施例1と同様にして、硬化性組成物の固形分(充填材を含む)の含有量58.2体積%であるプリプレグを得た。なお、ワニス(硬化性組成物)において、シアン酸エステル化合物(F)と、エポキシ樹脂(E)との官能基当量比は、0.61であった。
得られたプリプレグを用いて、実施例1と同様にして、積層体由来の絶縁層の厚さが0.2mmの金属箔張積層板(両面銅張積層板)を作製した。
プリプレグの製造において、フェノールノボラック型シアン酸エステル化合物(PT-30(商品名))を14質量部の代わりに10質量部用いて、かつ、ナフタレンクレゾールノボラック型エポキシ樹脂(HP-9540(商品名))を36質量部の代わりに40質量部用いた以外は、実施例1と同様にして、硬化性組成物の固形分(充填材を含む)の含有量58.2体積%であるプリプレグを得た。なお、ワニス(硬化性組成物)において、シアン酸エステル化合物(F)と、エポキシ樹脂(E)との官能基当量比は、0.48であった。
得られたプリプレグを用いて、実施例1と同様にして、積層体由来の絶縁層の厚さが0.2mmの金属箔張積層板(両面銅張積層板)を作製した。
プリプレグの製造において、フェノールノボラック型シアン酸エステル化合物(PT-30(商品名))14質量部の代わりに、合成例1により得られた1-ナフトールアラルキル型シアン酸エステル化合物(シアネート基(官能基)当量:261g/eq.、SN495V-CN)20質量部を用いて、かつ、ナフタレンクレゾールノボラック型エポキシ樹脂(HP-9540(商品名))を36質量部の代わりに30質量部用いた以外は、実施例1と同様にして、ワニス(硬化性組成物)を得た。シアン酸エステル化合物(F)と、エポキシ樹脂(E)との官能基当量比は、0.62であった。
得られたワニスをSガラス繊維(T2116(商品名)、(株)日東紡、厚さ100μm)に含浸塗工し、155℃で5分間加熱乾燥して、硬化性組成物の固形分(充填材を含む)の含有量58.2体積%であるプリプレグを得た。
得られたプリプレグを用いて、実施例1と同様にして、積層体由来の絶縁層の厚さが0.2mmの金属箔張積層板(両面銅張積層板)を作製した。
プリプレグの製造において、フェノールノボラック型シアン酸エステル化合物(PT-30(商品名))14質量部の代わりに、合成例1により得られた1-ナフトールアラルキル型シアン酸エステル化合物(SN495V-CN)18質量部を用いて、かつ、ナフタレンクレゾールノボラック型エポキシ樹脂(HP-9540(商品名))を36質量部の代わりに32質量部用いた以外は、実施例1と同様にして、実施例1と同様にして、ワニス(硬化性組成物)を得た。シアン酸エステル化合物(F)と、エポキシ樹脂(E)との官能基当量比は、0.53であった。
得られたワニスをSガラス繊維(T2116(商品名)、(株)日東紡、厚さ100μm)に含浸塗工し、155℃で5分間加熱乾燥して、硬化性組成物の固形分(充填材を含む)の含有量58.2体積%であるプリプレグを得た。
得られたプリプレグを用いて、実施例1と同様にして、積層体由来の絶縁層の厚さが0.2mmの金属箔張積層板(両面銅張積層板)を作製した。
プリプレグの製造において、フェノールノボラック型シアン酸エステル化合物(PT-30(商品名))14質量部の代わりに、合成例1により得られた1-ナフトールアラルキル型シアン酸エステル化合物(SN495V-CN)15質量部を用いて、かつ、ナフタレンクレゾールノボラック型エポキシ樹脂(HP-9540(商品名))を36質量部の代わりに35質量部用いた以外は、実施例1と同様にして、実施例1と同様にして、ワニス(硬化性組成物)を得た。シアン酸エステル化合物(F)と、エポキシ樹脂(E)との官能基当量比は、0.40であった。
得られたワニスをSガラス繊維(T2116(商品名)、(株)日東紡、厚さ100μm)に含浸塗工し、155℃で5分間加熱乾燥して、硬化性組成物の固形分(充填材を含む)の含有量58.2体積%であるプリプレグを得た。
得られたプリプレグを用いて、実施例1と同様にして、積層体由来の絶縁層の厚さが0.2mmの金属箔張積層板(両面銅張積層板)を作製した。
プリプレグの製造において、フェノールノボラック型シアン酸エステル化合物(PT-30(商品名))14質量部の代わりに、合成例1により得られた1-ナフトールアラルキル型シアン酸エステル化合物(SN495V-CN)12質量部を用いて、かつ、ナフタレンクレゾールノボラック型エポキシ樹脂(HP-9540(商品名))を36質量部の代わりに38質量部用いた以外は、実施例1と同様にして、実施例1と同様にして、ワニス(硬化性組成物)を得た。シアン酸エステル化合物(F)と、エポキシ樹脂(E)との官能基当量比は、0.30であった。
得られたワニスをSガラス繊維(T2116(商品名)、(株)日東紡、厚さ100μm)に含浸塗工し、155℃で5分間加熱乾燥して、硬化性組成物の固形分(充填材を含む)の含有量58.2体積%であるプリプレグを得た。
得られたプリプレグを用いて、実施例1と同様にして、積層体由来の絶縁層の厚さが0.2mmの金属箔張積層板(両面銅張積層板)を作製した。
(プリプレグ及び金属箔張積層板の製造)
実施例1で得られた重合体(D1)を含む溶液30質量部(固形分換算)に、合成例1により得られた1-ナフトールアラルキル型シアン酸エステル化合物(SN495V-CN)16質量部と、ナフタレンクレゾールノボラック型エポキシ樹脂(HP-9540(商品名))32.5質量部と、ノボラック型マレイミド化合物(BMI-2300(商品名))16質量部と、マレイミド化合物(BMI-80(商品名))5.5質量部と、スラリーシリカ(SC-2050MB(商品名))200質量部と、エポキシシランカップリング剤(KBM-403(商品名))5質量部と、湿潤分散剤(DISPERBYK-161(商品名))1質量部とを混合して、ワニス(硬化性組成物)を得た。シアン酸エステル化合物(F)と、エポキシ樹脂(E)との官能基当量比は、0.46であった。
得られたワニスをSガラス繊維(T2116(商品名)、(株)日東紡、厚さ100μm)に含浸塗工し、155℃で5分間加熱乾燥して、硬化性組成物の固形分(充填材を含む)の含有量58.2体積%であるプリプレグを得た。
得られたプリプレグを用いて、実施例1と同様にして、積層体由来の絶縁層の厚さが0.2mmの金属箔張積層板(両面銅張積層板)を作製した。
(プリプレグ及び金属箔張積層板の製造)
実施例1で得られた重合体(D1)を含む溶液30質量部(固形分換算)に、合成例1により得られた1-ナフトールアラルキル型シアン酸エステル化合物(SN495V-CN)15質量部と、ナフタレンクレゾールノボラック型エポキシ樹脂(HP-9540(商品名))25質量部と、ノボラック型マレイミド化合物(BMI-2300(商品名))22.5質量部と、マレイミド化合物(BMI-80(商品名))7.5質量部と、スラリーシリカ(SC-2050MB(商品名))140質量部と、エポキシシランカップリング剤(KBM-403(商品名))5質量部と、湿潤分散剤(DISPERBYK-161(商品名))1質量部とを混合して、ワニス(硬化性組成物)を得た。シアン酸エステル化合物(F)と、エポキシ樹脂(E)との官能基当量比は、0.56であった。
得られたワニスをSガラス繊維(T2116(商品名)、(株)日東紡、厚さ100μm)に含浸塗工し、165℃で5分間加熱乾燥して、硬化性組成物の固形分(充填材を含む)の含有量58.2体積%であるプリプレグを得た。
得られたプリプレグを用いて、実施例1と同様にして、積層体由来の絶縁層の厚さが0.2mmの金属箔張積層板(両面銅張積層板)を作製した。
(プリプレグ及び金属箔張積層板の製造)
実施例1で得られた重合体(D1)を含む溶液30質量部(固形分換算)に、合成例1により得られた1-ナフトールアラルキル型シアン酸エステル化合物(SN495V-CN)22質量部と、ナフタレンクレゾールノボラック型エポキシ樹脂(HP-9540(商品名))38質量部と、ノボラック型マレイミド化合物(BMI-2300(商品名))7.5質量部と、マレイミド化合物(BMI-80(商品名))2.5質量部と、スラリーシリカ(SC-2050MB(商品名))140質量部と、エポキシシランカップリング剤(KBM-403(商品名))5質量部と、湿潤分散剤(DISPERBYK-161(商品名))1質量部とを混合して、ワニス(硬化性組成物)を得た。シアン酸エステル化合物(F)と、エポキシ樹脂(E)との官能基当量比は、0.54であった。
得られたワニスをSガラス繊維(T2116(商品名)、(株)日東紡、厚さ100μm)に含浸塗工し、165℃で5分間加熱乾燥して、硬化性組成物の固形分(充填材を含む)の含有量58.2体積%であるプリプレグを得た。
得られたプリプレグを用いて、実施例1と同様にして、積層体由来の絶縁層の厚さが0.2mmの金属箔張積層板(両面銅張積層板)を作製した。
(プリプレグ及び金属箔張積層板の製造)
実施例1で得られた重合体(D1)を含む溶液30質量部(固形分換算)に、合成例1により得られた1-ナフトールアラルキル型シアン酸エステル化合物(SN495V-CN)18質量部と、ナフチレンエーテル型エポキシ樹脂(エポキシ基(官能基)当量:250g/eq、HP-6000(商品名)、DIC(株))32質量部と、ノボラック型マレイミド化合物(BMI-2300(商品名))15質量部と、マレイミド化合物(BMI-80(商品名))5質量部と、スラリーシリカ(SC-2050MB(商品名))140質量部と、エポキシシランカップリング剤(KBM-403(商品名))5質量部と、湿潤分散剤(DISPERBYK-161(商品名))1質量部とを混合して、ワニス(硬化性組成物)を得た。シアン酸エステル化合物(F)と、エポキシ樹脂(E)との官能基当量比は、0.54であった。
得られたワニスをSガラス繊維(T2116(商品名)、(株)日東紡、厚さ100μm)に含浸塗工し、155℃で5分間加熱乾燥して、硬化性組成物の固形分(充填材を含む)の含有量58.2体積%であるプリプレグを得た。
得られたプリプレグを用いて、実施例1と同様にして、積層体由来の絶縁層の厚さが0.2mmの金属箔張積層板(両面銅張積層板)を作製した。
プリプレグの製造において、フェノールノボラック型シアン酸エステル化合物(PT-30(商品名))を14質量部の代わりに18質量部用いて、かつ、ナフタレンクレゾールノボラック型エポキシ樹脂(HP-9540(商品名))を36質量部の代わりに32質量部用いた以外は、実施例1と同様にして、硬化性組成物の固形分(充填材を含む)の含有量58.2体積%であるプリプレグを得た。なお、ワニス(硬化性組成物)において、シアン酸エステル化合物(F)と、エポキシ樹脂(E)との官能基当量比は、1.08であった。
得られたプリプレグを用いて、実施例1と同様にして、積層体由来の絶縁層の厚さが0.2mmの金属箔張積層板(両面銅張積層板)を作製した。
プリプレグの製造において、フェノールノボラック型シアン酸エステル化合物(PT-30(商品名))を14質量部の代わりに5質量部用いて、かつ、ナフタレンクレゾールノボラック型エポキシ樹脂(HP-9540(商品名))を36質量部の代わりに45質量部用いた以外は、実施例1と同様にして、硬化性組成物の固形分(充填材を含む)の含有量58.2体積%であるプリプレグを得た。なお、ワニス(硬化性組成物)において、シアン酸エステル化合物(F)と、エポキシ樹脂(E)との官能基当量比は、0.21であった。
得られたプリプレグを用いて、実施例1と同様にして、積層体由来の絶縁層の厚さが0.2mmの金属箔張積層板(両面銅張積層板)を作製した。
プリプレグの製造において、合成例1により得られた1-ナフトールアラルキル型シアン酸エステル化合物(SN495V-CN)を20質量部の代わりに28質量部用いて、かつ、ナフタレンクレゾールノボラック型エポキシ樹脂(HP-9540(商品名))を30質量部の代わりに22質量部用いた以外は、実施例4と同様にして、硬化性組成物の固形分(充填材を含む)の含有量58.2体積%であるプリプレグを得た。なお、ワニス(硬化性組成物)において、シアン酸エステル化合物(F)と、エポキシ樹脂(E)との官能基当量比は、1.19であった。
得られたプリプレグを用いて、実施例4と同様にして、積層体由来の絶縁層の厚さが0.2mmの金属箔張積層板(両面銅張積層板)を作製した。
プリプレグの製造において、合成例1により得られた1-ナフトールアラルキル型シアン酸エステル化合物(SN495V-CN)を20質量部の代わりに10質量部用いて、かつ、ナフタレンクレゾールノボラック型エポキシ樹脂(HP-9540(商品名))を30質量部の代わりに40質量部用いた以外は、実施例4と同様にして、硬化性組成物の固形分(充填材を含む)の含有量58.2体積%であるプリプレグを得た。なお、ワニス(硬化性組成物)において、シアン酸エステル化合物(F)と、エポキシ樹脂(E)との官能基当量比は、0.23であった。
得られたプリプレグを用いて、実施例4と同様にして、積層体由来の絶縁層の厚さが0.2mmの金属箔張積層板(両面銅張積層板)を作製した。
(プリプレグ及び金属箔張積層板の製造)
実施例1で得られた重合体(D1)を含む溶液30質量部(固形分換算)に、合成例1により得られた1-ナフトールアラルキル型シアン酸エステル化合物(SN495V-CN)26質量部と、ナフチレンエーテル型エポキシ樹脂(HP-6000(商品名))27質量部と、ノボラック型マレイミド化合物(BMI-2300(商品名))17質量部と、スラリーシリカ(SC-2050MB(商品名))140質量部と、エポキシシランカップリング剤(KBM-403(商品名))5質量部と、湿潤分散剤(DISPERBYK-161(商品名))1質量部とを混合して、ワニス(硬化性組成物)を得た。シアン酸エステル化合物(F)と、エポキシ樹脂(E)との官能基当量比は、0.92であった。
得られたワニスをSガラス繊維(T2116(商品名)、(株)日東紡、厚さ100μm)に含浸塗工し、165℃で5分間加熱乾燥して、硬化性組成物の固形分(充填材を含む)の含有量58.2体積%であるプリプレグを得た。
得られたプリプレグを用いて、実施例1と同様にして、積層体由来の絶縁層の厚さが0.2mmの金属箔張積層板(両面銅張積層板)を作製した。
実施例及び比較例で得られた金属箔張積層板を用いて、次の方法により、熱膨張係数、耐熱性、及び銅箔ピール強度を評価した。結果を表1及び2に示す。
金属箔張積層板における積層体由来の絶縁層について、線熱膨張係数を測定した。具体的には、得られた金属箔張積層板をダイシングソーで6mm×10mm×0.22mmのサイズに切断後、両面の銅箔をエッチングにより除去した後に、220℃の恒温槽で2時間加熱して、成形による応力を除去した。その後、熱膨張測定装置(リンザイス社製L75H型水平方式ディラトメーター)を用いて40℃から320℃まで毎分10℃で昇温して、60℃から260℃における線熱膨張係数(CTE)(ppm/℃)を測定した。
得られた金属箔張積層板をダイシングソーで5mm×100mm×0.22mmのサイズに切断後、表面の銅箔をエッチングにより除去し、3個の測定用サンプルを得た。これらの測定用サンプルを用いて、JIS C6481に準拠して、動的粘弾性分析装置(TAインスツルメント製)でDMA法により、測定開始温度20℃、終了温度500℃、及び昇温速度10℃/分の条件で、窒素雰囲気下にて質量を測定し、質量減少率が5%となった温度を測定した。3個のサンプルにおける測定値より平均値を求めて、その平均値をガラス転移温度(Tg、℃)とした。
得られた金属箔張積層板(10mm×150mm×0.22mm)を用い、JIS C6481に準じて、金属箔ピール強度(銅箔密着性、kgf/cm)を測定した。
Claims (22)
- 少なくとも、アルケニルフェノール(A)に由来する構成単位と、エポキシ変性シリコーン(B)に由来する構成単位と、前記エポキシ変性シリコーン(B)以外のエポキシ化合物(C)に由来する構成単位と、を含む熱硬化性化合物(D)と、
エポキシ樹脂(E)と、
シアン酸エステル化合物(F)と、を含み、
前記エポキシ樹脂(E)は、前記エポキシ変性シリコーン(B)と異なり、かつ、前記エポキシ化合物(C)と同一であっても異なっていてもよく、
前記シアン酸エステル化合物(F)と、前記エポキシ樹脂(E)との官能基当量比(シアン酸エステル化合物(F)のシアネート基の当量/エポキシ樹脂(E)のエポキシ基の当量)が、0.25~0.85である、
硬化性組成物。 - 前記熱硬化性化合物(D)が、少なくとも、前記アルケニルフェノール(A)と、前記エポキシ変性シリコーン(B)と、前記エポキシ変性シリコーン(B)以外の前記エポキシ化合物(C)と、を重合して得られる重合体(D1)である、請求項1に記載の硬化性組成物。
- 前記アルケニルフェノール(A)が、ジアリルビスフェノール及び/又はジプロペニルビスフェノールを含む、請求項1又は2に記載の硬化性組成物。
- 前記エポキシ変性シリコーン(B)が、140~250g/molのエポキシ当量を有するエポキシ変性シリコーンを含む、請求項1又は2に記載の硬化性組成物。
- 前記熱硬化性化合物(D)の重量平均分子量が、3.0×103~5.0×104である、請求項1又は2に記載の硬化性組成物。
- 前記エポキシ樹脂(E)が、ナフタレンクレゾールノボラック型エポキシ樹脂及びナフチレンエーテル型エポキシ樹脂からなる群より選択される少なくとも1種を含む、請求項1又は2に記載の硬化性組成物。
- 前記シアン酸エステル化合物(F)が、下記式(4)で表される化合物及び/又は下記式(4)で表される化合物を除く下記式(5)で表される化合物を含む、請求項1又は2に記載の硬化性組成物。
- 前記熱硬化性化合物(D)の含有量が、前記熱硬化性化合物(D)と、前記エポキシ樹脂(E)と、前記シアン酸エステル化合物(F)との合計100質量部に対して、25~50質量部である、請求項1又は2に記載の硬化性組成物。
- 前記エポキシ樹脂(E)と前記シアン酸エステル化合物(F)との合計の含有量が、前記熱硬化性化合物(D)と、前記エポキシ樹脂(E)と、前記シアン酸エステル化合物(F)との合計100質量部に対して、50~75質量部である、請求項1又は2に記載の硬化性組成物。
- 前記熱硬化性化合物(D)の含有量が、前記熱硬化性化合物(D)と、前記エポキシ樹脂(E)と、前記シアン酸エステル化合物(F)との合計100質量部に対して、25~50質量部であり、
前記エポキシ樹脂(E)と前記シアン酸エステル化合物(F)との合計の含有量が、前記熱硬化性化合物(D)と、前記エポキシ樹脂(E)と、前記シアン酸エステル化合物(F)との合計100質量部に対して、50~75質量部である、請求項1又は2に記載の硬化性組成物。 - 前記熱硬化性化合物(D)と、前記エポキシ樹脂(E)と、前記シアン酸エステル化合物(F)との合計の含有量が、樹脂組成物中の樹脂固形分100質量部に対して、50~99質量部である、請求項1又は2に記載の硬化性組成物。
- マレイミド化合物を更に含む、請求項1又は2に記載の硬化性組成物。
- 前記マレイミド化合物の含有量が、前記熱硬化性化合物(D)と、前記エポキシ樹脂(E)と、前記シアン酸エステル化合物(F)との合計100質量部に対して、5~45質量部である、請求項14に記載の硬化性組成物。
- 無機充填材を更に含む、請求項1又は2に記載の硬化性組成物。
- 前記無機充填材の含有量が、前記熱硬化性化合物(D)と、前記エポキシ樹脂(E)と、前記シアン酸エステル化合物(F)との合計100質量部に対して、50~350質量部である、請求項17に記載の硬化性組成物。
- 前記無機充填材が、シリカ、水酸化アルミニウム、アルミナ、ベーマイト、窒化ホウ素、窒化アルミニウム、酸化チタン、チタン酸バリウム、酸化マグネシウム、及び水酸化マグネシウムからなる群より選択される少なくとも1種である、請求項17に記載の硬化性組成物。
- 基材と、
前記基材に含浸又は塗布された、請求項1又は2に記載の硬化性組成物と、
を含む、プリプレグ。 - 請求項20に記載のプリプレグを用いて形成された積層体と、
前記積層体の片面又は両面に配された金属箔と、を含む、
金属箔張積層板。 - 絶縁層と、
前記絶縁層の片面又は両面に形成された導体層と、を有し、
前記絶縁層が、請求項1又は2に記載の硬化性組成物の硬化物を含む、
プリント配線板。
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JP2018193505A (ja) * | 2017-05-19 | 2018-12-06 | 信越化学工業株式会社 | シリコーン変性エポキシ樹脂組成物及び半導体装置 |
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JPH06136093A (ja) * | 1992-09-08 | 1994-05-17 | Fujitsu Ltd | エポキシ樹脂組成物 |
JP2000256642A (ja) * | 1999-03-10 | 2000-09-19 | Mitsubishi Electric Corp | 導電性接着剤およびそれを用いてなる半導体装置 |
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