WO2017195902A1 - 樹脂組成物、プリプレグ、樹脂付き金属箔、積層板、プリント配線板及び樹脂組成物の製造方法 - Google Patents
樹脂組成物、プリプレグ、樹脂付き金属箔、積層板、プリント配線板及び樹脂組成物の製造方法 Download PDFInfo
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- 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
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- 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
- C08J2300/00—Characterised by the use of unspecified polymers
- C08J2300/24—Thermosetting resins
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- 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
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
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- 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
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C08J2333/08—Homopolymers or copolymers of acrylic acid esters
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- 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
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C08J2333/10—Homopolymers or copolymers of methacrylic acid esters
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- 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
- C08J2400/00—Characterised by the use of unspecified polymers
- C08J2400/24—Thermosetting resins
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- 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
- C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/56—Non-aqueous solutions or dispersions
Definitions
- the present invention relates to a resin composition, a prepreg, a metal foil with a resin, a laminate, a printed wiring board, and a method for producing a resin composition.
- Densification of printed wiring boards can be achieved more suitably by reducing the thickness of the glass cloth serving as a base material, for example, by making the thickness to 30 ⁇ m or less. Therefore, a prepreg having such a glass cloth is used. However, it has been developed and marketed recently. As a result, the density of printed wiring boards is increasing, but with this, sufficient heat resistance, insulation reliability, and adhesion between wiring layers and insulating layers should be secured. Has become difficult.
- the wiring board material used for such a high-performance printed wiring board is required to have heat resistance, electrical insulation, long-term reliability, adhesiveness, and the like.
- flexible wiring board materials listed as one of these high-function printed wiring boards are required to have properties such as flexibility and low elasticity.
- wiring board materials that satisfy these requirements include resin compositions in which thermosetting resins are blended with acrylic rubber polymers such as acrylonitrile butadiene resins and carboxy-containing acrylonitrile butadiene resins, and terminal-modified polyethersulfones.
- a resin composition in which a thermosetting resin is blended with a thermoplastic resin such as the above has been proposed (see, for example, Patent Documents 1 to 3).
- Acrylic polymer is a polymer that has a particularly good balance of low elasticity, elongation, flexibility (flexibility), electrical insulation, etc., and it is required that these excellent characteristics be fully exhibited in the resulting wiring board. It has been.
- a resin composition formed by mixing an acrylic polymer having a functional group and a thermosetting resin has a structure in a state where they are connected to each other and regularly dispersed, and a sea phase whose main component is an acrylic polymer, A phase separation structure with an island phase whose main component is a thermosetting resin (for example, epoxy resin) can be formed.
- a resin composition is desired to have both excellent characteristics of both the acrylic polymer and the thermosetting resin, but none of them has both excellent characteristics sufficiently.
- the characteristics of the acrylic polymer having a functional group include low elasticity, high elongation, and easy introduction of functional groups.
- the characteristics of the thermosetting resin are high insulation reliability, high heat resistance, and high glass transition temperature. (Tg) etc. are mentioned. However, it has been difficult to control and develop each feature according to the usage environment and application.
- An object of the present invention is a resin composition, prepreg, metal foil with resin, laminated board, printed wiring board, and resin composition, which are excellent in low elasticity, high elongation, insulation reliability, heat resistance and adhesion to metal foil. It is to provide a manufacturing method.
- the present invention relates to the following [1] to [15].
- a resin composition containing (A) an acrylic polymer and (B) a thermosetting resin, wherein (A) a first phase containing an acrylic polymer and (B) a second phase containing a thermosetting resin And a phase separation structure, and an average domain size of the second phase is 20 ⁇ m or less.
- the (A) acrylic polymer is an acrylic polymer containing a structural unit derived from a (meth) acrylic acid ester represented by the following general formula (A1).
- R 2 represents an alkyl group, a cycloalkyl group, a cycloalkylalkyl group, an aryl group or an aralkyl group.
- R 1 represents a hydrogen atom or a methyl group.
- thermosetting resin is an epoxy resin, cyanate resin, bismaleimide, addition polymer of bismaleimide and diamine, phenol resin, resol resin, isocyanate resin, triallyl isocyanurate, triallylcia
- phase separation structure according to any one of [1] to [6], wherein the phase separation structure is a sea-island structure, a sea phase is composed of the first phase, and an island phase is composed of the second phase.
- Resin composition [8] The resin composition according to any one of [1] to [7] above, wherein the solubility parameter (SP value) of (B) thermosetting resin is 9.0 to 15.0.
- the absolute value of the difference between the solubility parameter (SP value) of (A) acrylic polymer and the solubility parameter (SP value) of (B) thermosetting resin is 0.1 to 5.0, [1] The resin composition according to any one of [8].
- a method for producing a resin composition comprising (A) an acrylic polymer and (B) a thermosetting resin, comprising the following steps 1 to 4.
- Step 1 Step of determining storage elastic modulus of cured product of desired resin composition
- Step 2 (A) Acrylic polymer solubility parameter (SP value) and (B) Thermosetting resin solubility parameter (SP value) Step of specifying the absolute value X based on the correlation between the absolute value X of the difference between the storage modulus and the storage elastic modulus of the cured product
- Step 3 The absolute value X specified in Step 2 (A) acrylic polymer and (B) Step of selecting thermosetting resin
- Step 4 Step of mixing (A) acrylic polymer and (B) thermosetting resin selected in step 3 [15]
- A) Acrylic polymer and (B) thermosetting resin A method for producing a resin composition comprising the following steps 1 to 4.
- Step 1 Step of determining the heat resistance of a cured product of a desired resin composition
- Step 2 (A) A solubility parameter (SP value) of an acrylic polymer and (B) a solubility parameter (SP value) of a thermosetting resin Step of specifying the absolute value X based on the correlation between the absolute value X of the difference and the heat resistance of the cured product
- Step 3 The (A) acrylic polymer and the (B) thermosetting that have the absolute value X specified in Step 2 Step of selecting a functional resin
- Step 4 A step of mixing (A) an acrylic polymer and (B) a thermosetting resin selected in Step 3
- a method can be provided.
- phase-separation structure of a resin composition is a continuous spherical structure. It is a model figure showing the case where the phase-separation structure of a resin composition is a sea-island structure. It is a model figure showing the case where the phase-separation structure of a resin composition is a composite dispersed phase structure. It is a model figure showing the case where the phase-separation structure of a resin composition is a bicontinuous phase structure. It is an electron micrograph showing the cross-sectional structure as an example of the hardened
- D sea-island structure obtained by the compounding system except (D) component from Example 6.
- the resin composition which concerns on embodiment of this invention is a resin composition containing (A) acrylic polymer and (B) thermosetting resin, Comprising: (A) The 1st phase containing acrylic polymer, (B ) A resin composition which forms a phase separation structure with a second phase containing a thermosetting resin and has an average domain size of the second phase of 20 ⁇ m or less.
- the first phase is a phase containing (A) an acrylic polymer
- the second phase is a phase containing (B) a thermosetting resin
- the average domain size of the two phases is 20 ⁇ m or less.
- the first phase is a phase containing (A) an acrylic polymer as a main component of a resin component
- the second phase is a phase containing (B) a thermosetting resin as a main component of a resin component.
- the main component of the resin component means a resin having the highest content among the resin components, and is estimated based on the content relative to the total amount of the resin composition.
- phase structure of the cured resin is determined by a competitive reaction between the phase separation rate and the curing reaction rate. For example, by reducing the difference between (A) the solubility parameter of the acrylic polymer (hereinafter also referred to as “SP value”) and (B) the SP value of the thermosetting resin, the phase separation rate is reduced.
- SP value the solubility parameter of the acrylic polymer
- B the SP value of the thermosetting resin
- SP value of (A) acrylic polymer and (B) thermosetting resin can be calculated
- ⁇ i represents an SP value
- ⁇ Ei represents a total molar cohesive energy
- ⁇ Vi represents a total molar molecular capacity
- the SP value is calculated by the above method as follows.
- Number of members: CH 3 2 C O 1
- Total molar cohesive energy ( ⁇ Ei): (1125 ⁇ 2) + (4150 ⁇ 1) 6400
- Total molar molecular capacity ( ⁇ Vi): (33.5 ⁇ 2) + (10.8 ⁇ 1) 77.8
- solubility parameter (SP value) is calculated.
- a phenol resin, an amine compound, etc. may be used together as a hardening
- curing agents are not a main component and there are few quantities, the influence with respect to SP value of (B) thermosetting resin is small. Therefore, as a method for calculating the SP value when using the epoxy resin and the curing agent in combination, the SP value calculated only from the epoxy resin is used without considering the curing agent. This treatment is the same for thermosetting resins other than epoxy resins. In addition, since a phenol resin etc.
- the SP value is a value close
- the SP value of the acrylic polymer is preferably from 9.0 to 12.0, more preferably from 9.2 to 11.8, even more preferably from 9.4 to 11.6, from the viewpoint of low hygroscopicity. From the viewpoint of properties, 9.5 to 11.0 is particularly preferable.
- the SP value of the thermosetting resin is preferably 9.0 to 15.0, more preferably 10.5 to 14.5, and still more preferably 12.0 to 14.3.
- the absolute value of the difference between the SP value of the (A) acrylic polymer and the SP value of the (B) thermosetting resin is preferably 0.1 to 5.0, more preferably 0.11 to 4.9, 0 12 to 4.8 is more preferable, and 0.13 to 4.7 is particularly preferable.
- the absolute value of the SP value difference within the above range, the average domain size of the second phase can be controlled to a relatively small range of 20 ⁇ m or less.
- the resin composition of this invention adjusts the physical property of the hardened
- the absolute value of the difference between the SP value of (A) the acrylic polymer and the (B) SP value of the thermosetting resin is 3.0 to 5.0
- the absolute value of the difference in the SP value is 0.1 to 3.0
- (A) the acrylic polymer has a low strength while maintaining the characteristics such as (B) the high strength of the thermosetting resin.
- the characteristics such as elasticity, flexibility, and high elongation tend to be remarkably exhibited.
- the absolute value of the SP value difference is 0.45 or less
- the average domain size of the second phase is about 0.001 to 1.0 ⁇ m and tends to form nano-sized domains.
- the (A) acrylic polymer is usually a polymer having a (meth) acrylic acid ester as a monomer.
- An acrylic polymer may be used individually by 1 type, and may use 2 or more types together.
- an acrylic polymer is an acrylic polymer containing the structural unit derived from the (meth) acrylic acid ester represented by the following general formula (A1).
- (meth) acrylic acid indicates both “acrylic acid” and “methacrylic acid”, and the same applies to other similar terms.
- R 2 represents an alkyl group, a cycloalkyl group, a cycloalkylalkyl group, an aryl group or an aralkyl group.
- R 1 represents a hydrogen atom or a methyl group.
- the alkyl group represented by R 2 preferably has 1 to 20 carbon atoms, more preferably 1 to 15 carbon atoms, and still more preferably 2 to 10 carbon atoms.
- Examples of the alkyl group include a methyl group, an ethyl group, a propyl group, a butyl group, and a 2-ethylhexyl group. These alkyl groups may have a substituent.
- Examples of the substituent for the alkyl group include an alicyclic hydrocarbon group, a hydroxyl group, a halogen, an oxygen-containing hydrocarbon group, and a nitrogen-containing cyclic group.
- the carbon number of the cycloalkyl group represented by R 2 is preferably 6 to 13, and more preferably 7 to 10.
- Examples of the cycloalkyl group include a cyclohexyl group, a norbornyl group, a tricyclodecanyl group, an isobornyl group, an adamantyl group, and the like. Among these, a norbornyl group, a tricyclodecanyl group, and an isobornyl group are preferable.
- the carbon number of the cycloalkylalkyl group represented by R 2 is preferably 6 to 13, more preferably 7 to 10.
- Examples of the cycloalkylalkyl group include a norbornylmethyl group and a tricyclodecylethyl group.
- the number of carbon atoms of the aryl group represented by R 2 is preferably 6 to 13, and more preferably 6 to 10.
- Examples of the aryl group include a phenyl group and a nonylphenyl group.
- the number of carbon atoms in the aralkyl group represented by R 2 is preferably 7 to 15, and more preferably 7 to 11.
- Examples of the aralkyl group include a benzyl group and a 4-methylbenzyl group.
- (Meth) acrylic acid esters include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, hexyl (meth) acrylate, (meth) acrylic acid 2 -Ethylhexyl, isobutyl (meth) acrylate, ethylene glycol methyl ether (meth) acrylate, cyclohexyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, (meth) Isobornyl acrylate, tricyclo [5.2.1,0 (2,6)] dec-8yl (meth) acrylate, isodecyl (meth) acrylate, octadecyl (meth) acrylate, lauryl (meth) acrylate, Allyl (meth) acrylate, norbornylmethyl (
- the acrylic polymer is preferably an acrylic polymer provided with a crosslinkable functional group.
- Such an acrylic polymer can be obtained as a copolymer of (meth) acrylic acid ester and a copolymerizable monomer having a crosslinkable functional group (hereinafter also simply referred to as “crosslinkable copolymerizable monomer”).
- the crosslinkable copolymer monomer include monomers having a crosslinkable functional group such as a carboxy group, a hydroxyl group, an amino group, a vinyl group, a glycidyl group, and an epoxy group.
- a crosslinkable copolymer monomer having an epoxy group is preferable from the viewpoint of low hygroscopicity and heat resistance. These monomers are preferably compounds having a double bond.
- crosslinkable copolymer monomers include monomers having a carboxy group such as acrylic acid and methacrylic acid; monomers having an epoxy group such as glycidyl acrylate and glycidyl methacrylate; hydroxyethyl acrylate, hydroxypropyl acrylate, and methacrylic acid.
- Monomers having a hydroxyl group such as hydroxyethyl, hydroxypropyl methacrylate; monomers having an amino group such as dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate, acrylamide, methacrylamide, dimethylacrylamide, dimethylmethacrylamide; cyano such as acrylonitrile And monomers having a group.
- a monomer having a carboxy group a monomer having an epoxy group, a monomer having a hydroxyl group, and a monomer having an amino group are preferable.
- an epoxy group is preferably used. More preferred are monomers having glycidyl acrylate and glycidyl methacrylate.
- a polymerizable monomer such as a substituted maleimide can be used together with a (meth) acrylic acid ester to obtain an (A) acrylic polymer.
- the amount of (meth) acrylic acid ester used is the same as that of (meth) acrylic acid ester and crosslinkable copolymer. It is preferably 70 to 99.5 parts by mass, more preferably 80 to 98 parts by mass, and still more preferably 90 to 97 parts by mass with respect to 100 parts by mass as a total with the polymerization monomer.
- the amount of the crosslinkable copolymer monomer used is preferably 0.5 to 30 parts by mass and more preferably 2 to 25 parts by mass with respect to 100 parts by mass of the total amount of the (meth) acrylic acid ester and the crosslinkable copolymer monomer. Preferably, 3 to 20 parts by mass is more preferable.
- a crosslinked structure is suitably formed between the (A) 1st phase containing an acrylic polymer and the (B) 2nd phase containing a thermosetting resin, heat resistance, metal foil The adhesive strength, insulation reliability, etc. tend to be further improved.
- the total content of the (meth) acrylic acid ester and the crosslinkable copolymer monomer is preferably 80% by mass or more, more preferably 90% by mass or more, and 95% by mass or more. More preferably, it may be 100% by mass.
- the epoxy equivalent is preferably 2,000 to 18,000 g / eq, more preferably 2,000 to 8,000 g / eq.
- the epoxy equivalent is 2,000 g / eq or more, a decrease in the glass transition temperature of the cured product is suppressed and the heat resistance of the substrate is sufficiently maintained, and when it is 18,000 g / eq or less, the storage elastic modulus is large. The dimensional stability of the substrate tends to be maintained without becoming too much.
- the epoxy equivalent of an acrylic polymer can be adjusted by appropriately adjusting the copolymerization ratio when copolymerizing glycidyl (meth) acrylate and another monomer copolymerizable therewith.
- acrylic polymers having an epoxy group examples include “HTR-860” (manufactured by Nagase ChemteX Corporation, trade name, epoxy equivalent 2,900 g / eq), “KH-CT-865” ( Hitachi Chemical Co., Ltd., trade name, epoxy equivalent 3,300 g / eq) and the like are available.
- the weight average molecular weight of the acrylic polymer is preferably 100,000 to 1,500,000, more preferably 300,000 to 1,500,000, from the viewpoint of improving low elasticity and elongation. More preferably, ⁇ 1,100,000.
- the weight average molecular weight of the (A) acrylic polymer is 100,000 or more, the phase-separated structure tends to be easily formed without the (A) acrylic polymer and the (B) thermosetting resin being completely compatible. If it is 1,500,000 or less, it tends to be dissolved in a solvent and tends to be excellent in handleability and dispersibility.
- (A) acrylic polymer may combine 2 or more types from which a weight average molecular weight differs.
- the SP value of the acrylic polymer (A) is calculated by dividing the SP value of each acrylic polymer by the blending amount.
- the weight average molecular weight is a value measured by gel permeation chromatography (GPC) analysis and means a standard polystyrene equivalent value.
- GPC analysis can be performed using tetrahydrofuran (THF) as a solution.
- the content of the (A) acrylic polymer in the resin composition of the present invention is preferably 10 to 50 parts by mass with respect to 100 parts by mass of the total solid content of the resin composition.
- the content of (A) acrylic polymer is 10 parts by mass or more, low elasticity and flexibility, which are excellent characteristics of (A) acrylic polymer, tend to be sufficiently obtained, and it is 50 parts by mass or less. And sufficient adhesive strength with metal foil is obtained.
- the content of the (A) acrylic polymer is more preferably 20 to 50 parts by weight, and more preferably 30 to 50 parts by weight with respect to 100 parts by weight of the total solid content of the resin composition. Is more preferable.
- the content of the (A) acrylic polymer is more preferably 10 to 40 parts by mass with respect to 100 parts by mass of the total solid content of the resin composition. More preferably, it is 30 parts by mass.
- the “solid content” in the present invention is a non-volatile content excluding a volatile component such as an organic solvent, and indicates a component that remains without volatilization when the resin composition is dried. Also includes liquid, syrupy and waxy.
- the acrylic polymer preferably has an alkali metal ion concentration of 500 ppm or less on a mass basis from the viewpoint of obtaining sufficient characteristics in an accelerated test of insulation reliability such as a pressure cooker bias test (PCBT). More preferably, it is 200 ppm or less, and further preferably 100 ppm or less.
- PCBT pressure cooker bias test
- the acrylic polymer is generally obtained by radical polymerization using a radical polymerization initiator.
- Radical polymerization initiators include persulfates such as azobisisobutyronitrile (AIBN), tert-butyl perbenzoate, benzoyl peroxide, lauroyl peroxide, potassium persulfate, cumene hydroperoxide, t-butyl hydroperoxide , Dicumyl peroxide, t-butyl peroxide, 2,2'-azobis-2,4-dimethylvaleronitrile, t-butyl perisobutyrate, t-butyl perpivalate, hydrogen peroxide / ferrous salt Examples thereof include sulfate / sodium acid sulfite, cumene hydroperoxide / ferrous salt, benzoyl peroxide / dimethylaniline, and the like. These may be used individually by 1 type and may combine 2 or more types.
- the (A) acrylic polymer may be powdery or liquid at room temperature (25 ° C.), but is excellent in solubility in a solvent and dispersibility of the (A) acrylic polymer in the resin composition. From this viewpoint, it is preferably liquid. From the viewpoint of enhancing the dispersibility of the (A) acrylic polymer in the resin composition, the (A) acrylic polymer is preferably used in a state where the above-described compound is dispersed in a solvent.
- thermosetting resin (B) Although it does not specifically limit as a thermosetting resin, An epoxy resin, cyanate resin, bismaleimides, the addition polymerization product of bismaleimides and diamine, phenol resin, resole resin, isocyanate resin, triallyl isocyanurate resin , Triallyl cyanurate resin, vinyl group-containing polyolefin compound and the like. Among these, epoxy resins (hereinafter also referred to as “(B-1) epoxy resins”) and cyanate resins are preferable from the viewpoint of excellent balance of performance such as heat resistance, insulation, and high glass transition temperature.
- a thermosetting resin may be used individually by 1 type, and may use 2 or more types together.
- the epoxy resin is preferably an epoxy resin having two or more epoxy groups in one molecule.
- the epoxy resin known ones can be used. For example, bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, biphenyl type epoxy resin, phenol novolac type epoxy resin, Cresol novolak type epoxy resin, bisphenol A novolak type epoxy resin, phosphorus containing epoxy resin, naphthalene skeleton containing epoxy resin, aralkylene skeleton containing epoxy resin, phenol biphenyl aralkyl type epoxy resin, phenol salicylaldehyde novolak type epoxy resin, lower alkyl group substituted phenol Salicylaldehyde novolac type epoxy resin, epoxy resin containing dicyclopentadiene skeleton, polyfunctional glycidylamine type epoxy resin, polyfunctional alicyclic epoxy Fat, tetrabromobisphenol A type epoxy resins. These may be used individually by 1 type and may use 2 or
- the epoxy resin may be a commercially available product, such as “N770” (trade name, manufactured by DIC Corporation), which is a phenol novolac type epoxy resin, and a tetrabromobisphenol A type epoxy resin.
- “EPICLON 153” (trade name, manufactured by DIC Corporation), “NC-3000-H” (trade name, manufactured by Nippon Kayaku Co., Ltd.) which is a biphenyl aralkyl type epoxy resin, and “bisphenol A type epoxy resin” “Epicoat 1001” (trade name, manufactured by Mitsubishi Chemical Corporation), “ZX-1548” (trade name, manufactured by Tohto Kasei Co., Ltd.) which is a phosphorus-containing epoxy resin, “EPICLON N-660” which is a cresol novolac type epoxy resin ( DIC Corporation, trade name) and the like.
- the weight average molecular weight of the epoxy resin is preferably 200 to 1,000, and more preferably 300 to 900.
- the weight average molecular weight of the component (B-1) is 200 or more, a phase separation structure tends to be formed favorably, and when it is 1,000 or less, the second domain has a relatively small average domain size. There is a tendency that a separation structure is easily formed, and low elasticity and flexibility tend to be easily exhibited.
- the epoxy equivalent of the epoxy resin is preferably 150 to 500 g / eq, more preferably 150 to 450 g / eq, and more preferably 150 to 300 g / eq from the viewpoint of compatibility.
- the SP value of the epoxy resin is preferably 9.0 to 15.0, more preferably 9.0 to 14.0 from the viewpoint of low hygroscopicity, and 9.5 to 1 from the viewpoint of heat resistance. 14.0 is more preferable.
- the SP value of the component (B-1) is 15.0 or less, it tends to be difficult to separate the components at the time of solution, and when it is 9.0 or more, the heat resistance tends to be improved.
- the SP value at this time is a value obtained only from the epoxy resin (B-1) regardless of the type of the curing agent as described above.
- cyanate resin used as a thermosetting resin a well-known thing can be used, and a novolak type cyanate resin, bisphenol A type cyanate resin, bisphenol E type cyanate resin, bisphenol F type cyanate resin, tetramethyl Examples thereof include bisphenol F type cyanate resin and dicyclopentadiene type cyanate resin. These may be used individually by 1 type and may use 2 or more types together. Among these, it is preferable that 1 or more types of bisphenol A type cyanate resin are included from a compatible viewpoint with the (A) acrylic polymer at the time of making into a solution.
- a catalyst When a cyanate resin is used as the thermosetting resin, a catalyst, a promoter or the like may be used in combination.
- the catalyst include 2-phenyl-4-methylimidazole, 2-phenyl-4 -methyl-5-hydroxymethylimidazole, 2-phenyl-4,5-dihydroxymethylimidazole, 2,4-diamino-6- (2 ′ Imidazole curing agents such as -undecylimidazolyl) -ethyl-s-triazine, 2,4-diamino-6- [2'-ethyl-4-methylimidazolyl- (1 ')]-ethyl-s-triazine; cobalt , Zinc, copper, iron, nickel, manganese, tin, and other metal salts or metal complexes.
- the catalyst include phenolic compounds such as alkylphenols, bisphenol compounds, and phenol novolacs.
- thermosetting resin may use a hardening
- a well-known thing can be used as a hardening
- the curing agent may be a phenol novolak resin, a cresol novolac resin, a bisphenol A novolak resin, a phenol resin such as a biphenyl novolac type phenol resin; dicyandiamide, Examples include amine-based curing agents such as diaminodiphenylmethane and diaminodiphenylsulfone; acid anhydride curing agents such as pyromellitic anhydride, trimellitic anhydride, and benzophenonetetracarboxylic acid; and mixtures thereof.
- the resin composition of the present invention includes (B-1) an epoxy resin as the (B) thermosetting resin, and (B-2) a phenol resin as a curing agent from the viewpoint of securing adhesion strength with
- B-2 A commercially available phenol resin may be used.
- examples of the commercially available products include “KA-1165” (trade name, manufactured by DIC Corporation), which is a cresol novolac type phenol resin, and a biphenyl novolac type phenol resin.
- “MEH-7851” (trade name, manufactured by Meiwa Kasei Co., Ltd.) and the like.
- the (B-2) phenolic resin can be used in any proportion depending on the combination with the (B-1) epoxy resin, and the compounding ratio can usually be determined so that the glass transition temperature becomes high. it can.
- the content of (B-2) phenolic resin is preferably 0.5 to 1.5 equivalents relative to (B-1) epoxy resin, and preferably 0.6 to 1.3 equivalents. More preferably, it is 0.7 to 1.2 equivalents. It exists in the tendency for it to be excellent in adhesiveness with an outer layer copper, glass transition temperature, and insulation as it is in the said range.
- the content of the thermosetting resin (B) in the resin composition of the present invention is preferably 15 to 80 parts by mass, more preferably 30 to 75 parts by mass with respect to 100 parts by mass of the total solid content of the resin composition. 35 to 70 parts by mass is more preferable.
- the content of the (B) thermosetting resin also includes (B-2) the content of a curing agent such as a phenol resin.
- the mass ratio of (A) acrylic polymer to (B) thermosetting resin ((A) acrylic polymer: (B) thermosetting resin) is 10:90 to 90. : 10 is preferable, 20:80 to 80:20 is more preferable, 30:70 to 70:30 is more preferable, and 40:60 to 60:40 is particularly preferable.
- the mass ratio ((A) acrylic polymer: (B) thermosetting resin) is within the above range, the phase separation in which the characteristics of both (A) acrylic polymer and (B) thermosetting resin are sufficiently expressed. The structure tends to be obtained.
- the resin composition of this invention may contain the (C) hardening accelerator according to the kind of (B) thermosetting resin.
- the thermosetting resin is (B-1) an epoxy resin
- the (C) curing accelerator is not particularly limited, but amines or imidazoles are preferred. Examples of amines include dicyandiamide, diaminodiphenylethane, guanylurea and the like.
- Examples of imidazoles include 2-phenylimidazole, 1-cyanoethyl-2-methylimidazole, 1-cyanoethyl-2-undecylimidazole, 1-cyanoethyl-2-phenylimidazole, 1-cyanoethyl-2-phenylimidazolium trimellitate. , Benzimidazole and the like.
- the content of the (C) curing accelerator in the resin composition of the present invention is preferably 0.01 to 10 parts by mass, and 0.05 to 2 parts by mass with respect to 100 parts by mass of the total solid content of the resin composition. Is more preferable, and 0.07 to 0.5 parts by mass is even more preferable.
- the (B) thermosetting resin is (B-1) an epoxy resin
- the content of the (C) curing accelerator can be determined according to the total amount of oxirane rings in the resin composition.
- the resin composition of the present invention may contain (D) a filler.
- a filler (D) Although it does not specifically limit as a filler, From a viewpoint of ensuring the reduction of a thermal expansion coefficient and a flame retardance, an inorganic filler is preferable.
- inorganic fillers include silica, alumina, titanium oxide, aluminum hydroxide, magnesium hydroxide, calcium carbonate, magnesium carbonate, calcium silicate, calcium oxide, magnesium oxide, aluminum nitride, aluminum borate whisker, boron nitride, and silicon carbide. Can be mentioned. These may be used individually by 1 type and may use 2 or more types together. Among these, silica is preferable because of its low dielectric constant and low linear expansion coefficient. Examples of silica include synthetic silica synthesized by a wet method or a dry method, crushed silica, fused silica, and the like.
- the average particle size of the filler is preferably from 0.1 to 4.0 ⁇ m, more preferably from 0.2 to 3.5 ⁇ m, still more preferably from 0.3 to 3.2 ⁇ m.
- the (D) filler tends to disperse, the viscosity of the varnish decreases, and the handling becomes easy because the handling becomes easy.
- (D) sedimentation of the filler tends to hardly occur during varnishing.
- the average particle diameter in the present invention is a particle diameter at a point corresponding to a volume of 50% when a cumulative frequency distribution curve based on the particle diameter is obtained with the total volume of the particles being 100%, and laser diffraction scattering. It can be measured by a particle size distribution measuring apparatus using a method.
- the filler may be (D-1) a filler subjected to a coupling treatment (hereinafter, also referred to as “component (D-1)”).
- a silane coupling agent is preferable.
- an aminosilane coupling agent, an epoxysilane coupling agent, a phenylsilane coupling agent, and an alkylsilane coupling cup are used. Examples thereof include a ring agent, an alkenyl silane coupling agent, and an alkynyl silane coupling agent. These may be used individually by 1 type and may use 2 or more types together.
- both (D-1) component and (D-2) filler not subjected to coupling treatment (hereinafter referred to as “(D-2) component”) It is more preferable that both are included.
- the average particle diameter of the component (D-1) is preferably from 0.1 to 1.5 ⁇ m, more preferably from 0.2 to 1.2 ⁇ m, still more preferably from 0.3 to 1.0 ⁇ m.
- the average particle size of the component (D-2) is preferably 1.0 to 3.5 ⁇ m, more preferably 1.2 to 3.2 ⁇ m, and further preferably 1.4 to 3.0 ⁇ m.
- the filler tends to disperse and tends not to agglomerate, and when it is 3.5 ⁇ m or less, the filler is precipitated during varnishing. It tends not to occur.
- the mass ratio [(D-1) :( D-2)] is preferably 10:90 to 90:10, and 20:80 to 80:20 is more preferable, and 30:70 to 70:30 is more preferable.
- the blending ratio is within the above range, the characteristics of both (A) acrylic polymer and (B) thermosetting resin tend to be sufficiently expressed.
- the (D) filler is present in any phase without being unevenly distributed in one phase of the first phase or the second phase from the viewpoint of enhancing dispersibility and expressing the filler addition effect uniformly. It is preferable.
- a phase separation structure in which (D) filler is present in either the first phase or the second phase is obtained.
- cured material containing the filler obtained from FIG. 13 (a) and (b) from the resin composition of this invention is shown. Note that FIG. 13B is an enlarged view of region A in FIG.
- (D) filler 3 is present in the sea phase ((A) acrylic polymer) 1, and (D) is present in the island phase ((B) thermosetting resin) 2. It can be seen that the phase separation structure in which the filler 4 is present and the (D) filler is present in either the first phase or the second phase is obtained.
- the content of the (D) filler in the resin composition of the present invention is preferably 5 to 40 parts by weight, more preferably 10 to 35 parts by weight, more preferably 15 to 15 parts by weight based on 100 parts by weight of the total solid content of the resin composition. 30 parts by mass is more preferable.
- the filler content is 5 parts by mass or more, the coefficient of linear expansion tends to be low, and sufficient heat resistance tends to be obtained.
- crosslinking agents such as isocyanate resins and melamine resins
- flame retardants such as phosphorus compounds
- rubber elastomers conductive particles, coupling agents, flow regulators, antioxidants Agents, pigments, leveling agents, antifoaming agents, ion trapping agents and the like.
- the resin composition of the present invention may be a varnish-like resin composition (hereinafter also simply referred to as “varnish”) dissolved and / or dispersed in an organic solvent.
- Organic solvents used in the varnish include ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone; aromatic hydrocarbon solvents such as toluene and xylene; methoxyethyl acetate, ethoxyethyl acetate, butoxyethyl acetate, ethyl acetate Ester solvents such as N-methylpyrrolidone, formamide, N-methylformamide, N, N-dimethylacetamide and the like amide solvents; methanol, ethanol, ethylene glycol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol, Triethylene glycol monomethyl ether, triethylene glycol monoethyl
- the resin composition of the present invention forms a phase separation structure of (A) a first phase containing an acrylic polymer and (B) a second phase containing a thermosetting resin.
- the phase separation structure in the present invention is a sea-island structure, a continuous spherical structure, a composite dispersed phase structure, or a co-continuous phase structure.
- Regarding these phase-separated structures for example, “Polymer Alloy”, page 325 (1993), Tokyo Chemical Dojin, and for continuous spherical structures, see, for example, Keizo Yamanaka and Takashi Inue, POLYMER, Vol. 30, pp. 662 (1989).
- 1 to 4 show model diagrams representing a continuous spherical structure, a sea-island structure, a composite dispersed phase structure, and a co-continuous phase structure, respectively.
- the resin composition of the present invention can form any structure of a continuous spherical structure, a sea-island structure, a composite dispersed phase structure, or a co-continuous phase structure. Among these, it is preferable to form a sea-island structure from the viewpoint of enhancing stress relaxation properties.
- the sea-island structure is formed from the resin composition of the present invention, (A) the acrylic polymer forms the sea phase, and (B) the thermosetting resin forms the island phase.
- the resin composition of the present invention is a resin composition that forms the phase separation structure in which the average domain size of the second phase containing the thermosetting resin (B) is 20 ⁇ m or less.
- the average domain size of the second phase is 20 ⁇ m or less.
- the (A) acrylic polymer and the (B) thermosetting resin have an apparently close-compatible structure, and the entangled (A) acrylic polymer network (B) Since the thermosetting resin is dispersed in nano-size, (A) the acrylic polymer can exhibit more remarkable properties such as low elasticity, flexibility, and high elongation, and the phase separation structure is complicated. As a result, the adhesive strength with the metal foil tends to increase. Further, when the average domain size of the second phase is 10 to 20 ⁇ m, (B) the thermosetting resin can exhibit the characteristics such as high elasticity and high strength, and (A) the low elasticity of the acrylic polymer.
- the average domain size of the second phase can be adjusted according to the desired characteristics, but balances the characteristics derived from (A) the acrylic polymer and (B) the characteristics derived from the thermosetting resin. From the viewpoint of well expressing, the average domain size of the second phase may be 0.001 to 20 ⁇ m, 0.1 to 15 ⁇ m, or 1 to 10 ⁇ m.
- the average domain size of the second phase is the cross-sectional structure of the cured product obtained from the resin composition of the present invention using a scanning electron microscope. It can be measured by observing with (SEM), measuring the maximum width of each of the 100 domains of the second phase, and calculating the average value.
- SEM scanning electron microscope
- the phase separation structure is a co-continuous structure, arbitrary 100 points are specified in the second phase domain, and the vertical domain size and the horizontal domain size on the SEM photograph are measured at each point. The value obtained by calculating the average value of the smaller domain sizes is defined as the average domain size. More specifically, the average domain size of the second phase can be measured by the method described in Examples.
- Whether the resin composition of the present invention forms a phase-separated structure can also be confirmed by a method of measuring the loss coefficient tan ⁇ for the cured product obtained from the resin composition of the present invention. Specifically, dynamic viscoelasticity measurement is performed on the cured product obtained from the resin composition of the present invention, and in the obtained loss coefficient tan ⁇ curve, (A) a peak derived from an acrylic polymer, and (B) heat When two peaks derived from the curable resin appear, it can be determined that a phase separation structure is formed. 10 to 12 show loss coefficient tan ⁇ curves of the resin compositions obtained in Examples 2, 7 and 12. FIG. 10 to 12, a peak around 30 to 70 ° C.
- tan ⁇ curve is a peak derived from (A) an acrylic polymer, and a peak around 150 to 200 ° C. is a peak derived from (B) a thermosetting resin. It can be seen that the presence of these peaks forms a phase separation structure in the resin composition. Since domains having an average domain size exceeding 20 ⁇ m can be confirmed by SEM observation, if the phase separation structure is not confirmed by the SEM observation and two peaks are confirmed by the loss factor tan ⁇ curve as described above, the average domain It can be determined that a second phase having a size of 20 ⁇ m or less is formed. The tan ⁇ curve can be measured in more detail by the method described in the examples.
- Such a fine phase separation structure can be obtained by controlling the catalyst species of the resin composition, the curing conditions such as the reaction temperature, or the compatibility between the components of the resin composition.
- the curing conditions such as the reaction temperature, or the compatibility between the components of the resin composition.
- the compatibility with (A) acrylic polymer is lowered, or in the case of the same composition system, the curing temperature is increased.
- it can be achieved by slowing the curing rate by selecting the catalyst type.
- FIGS. 7, 8 and 9 show electron micrographs showing the cross-sectional structure of an example of the resin composition having the sea-island structure thus obtained (corresponding to Examples 2, 7 and 12, respectively).
- the resin composition has a sea-island structure consisting of (A) a sea phase containing an acrylic polymer and (B-1) an island phase containing an epoxy resin by controlling the SP value of each component.
- the average domain size of the island phase is controlled to 20 ⁇ m or less.
- the resin composition of the present invention does not contain (D) filler, a sea-island structure or continuous spherical structure is formed, but when (D) filler is contained, a fine co-continuous phase structure or composite dispersed phase structure is formed. Can be done.
- the storage elastic modulus of the cured product obtained from the resin composition of the present invention is preferably 2.0 ⁇ 10 9 Pa or less, more preferably 1.9 ⁇ 10 9 Pa or less, from the viewpoint of expressing a stress relaxation effect. More preferably, it is 8 ⁇ 10 9 Pa or less.
- the storage elastic modulus can be set, for example, within the above range by adjusting the content of the (D) filler, and from this viewpoint, the content of the (D) filler is within the above range. Is preferred.
- cured material can be measured by the method as described in an Example.
- the resin composition of the present invention can be produced, for example, by a production method having the following steps 1 to 4.
- Step 1 Step of determining physical properties of a cured product of a desired resin composition
- Step 2 Difference between (A) solubility parameter (SP value) of acrylic polymer and (B) solubility parameter (SP value) of thermosetting resin Step of specifying the absolute value X based on the correlation between the absolute value X of the cured product and the physical properties of the cured product
- Step 3 The (A) acrylic polymer and the (B) thermosetting resin that have the absolute value X specified in Step 2
- Step 4 Step of mixing (A) acrylic polymer and (B) thermosetting resin selected in Step 3
- the physical properties of the cured product in step 1 are, for example, storage elastic modulus, thermal expansion characteristics, flexibility, high elongation, heat resistance, mechanical strength, adhesion to metal foil, insulation reliability, etc. It is preferable to determine in step 1 the value of elastic modulus (low elasticity), which is a typical characteristic of acrylic polymer, or the value of heat resistance, which is a typical characteristic of (B) thermosetting resin.
- the absolute value X is specified based on the correlation with the rate, heat resistance, and the like.
- the correlation between the absolute value X and the physical property of the cured product can be determined by acquiring the absolute value X and the physical property of the cured product in advance for a plurality of compositions.
- step 3 (A) an acrylic polymer and (B) a thermosetting resin having the absolute value X specified in step 2 are selected. Since the SP value of (A) acrylic polymer and (B) thermosetting resin can be calculated from the above-mentioned Fedors method or the like, (A) acrylic polymer and (B) thermosetting resin so as to obtain the absolute value X to be obtained. What is necessary is just to determine the structure.
- step 4 (A) the acrylic polymer selected in step 3 and (B) the thermosetting resin are mixed. As a mixing method, a conventionally known stirrer or the like can be applied.
- the prepreg of the present invention is obtained by impregnating a base material with the resin composition of the present invention and drying.
- the prepreg can be produced, for example, by impregnating a substrate with the varnish-shaped resin composition of the present invention and drying it.
- a fiber substrate such as a woven fabric or a nonwoven fabric is usually used.
- the material of the fiber substrate examples include inorganic fibers such as glass, alumina, asbestos, boron, silica alumina glass, silica glass, tyrano, silicon carbide, silicon nitride, zirconia; aramid, polyether ether ketone, polyether imide, Organic fibers such as polyethersulfone, carbon, and cellulose; and mixed papers thereof.
- the thickness of the substrate is preferably 10 to 100 ⁇ m, more preferably 20 to 50 ⁇ m.
- the production conditions of the prepreg are not particularly limited, but it is preferable that 80% by mass or more of the organic solvent used for the varnish is volatilized in the obtained prepreg.
- the drying temperature is, for example, 80 to 180 ° C., and the drying time is appropriately set in consideration of the varnish gelation time.
- the amount of impregnation of the varnish is preferably such that the solid content of the resin composition of the present invention in the obtained prepreg is 30 to 80% by mass.
- the metal foil with resin of the present invention is formed by laminating the resin composition of the present invention and a metal foil.
- the metal foil with resin can be produced, for example, by applying the resin composition of the present invention to a metal foil and drying it. Drying conditions can be produced, for example, by drying at 80 to 180 ° C.
- the laminated board of this invention is a laminated board formed by laminating
- positioned metal foil may be called a "metal tension laminated board.”
- the metal-clad laminate is laminated, for example, so that the adhesive surfaces on both sides of the laminate obtained by laminating a plurality of the prepregs of the present invention and the metal foil are aligned, and usually 130 to 250 ° C., preferably 150, under vacuum press conditions. It can be produced by hot pressing at a temperature of 230 ° C. and a pressure of 0.5-10 MPa, preferably 1-5 MPa.
- the metal-clad laminate with resin of the present invention can be produced by stacking two sheets so that the resin surfaces face each other and pressing with a vacuum press.
- a vacuum press for heating and pressing, for example, a multistage press, a multistage vacuum press, continuous molding, an autoclave molding machine, or the like can be used.
- metal foil used for the metal-clad laminate for example, copper foil and aluminum foil are generally used.
- the thickness of the metal foil is, for example, 1 to 200 ⁇ m that is generally used for laminated sheets.
- nickel, nickel-phosphorus, nickel-tin alloy, nickel-iron alloy, lead, lead-tin alloy, etc. are used as intermediate layers, and 0.5 to 15 ⁇ m copper layer and 10 to 300 ⁇ m on both sides.
- a three-layer composite foil provided with a copper layer, a two-layer composite foil obtained by combining aluminum and copper foil, or the like can be used.
- the printed wiring board of the present invention is obtained by subjecting the laminated board of the present invention to circuit processing.
- the printed wiring board of the present invention can be produced, for example, by applying a circuit (wiring) process to the metal foil of the laminate (metal-clad laminate) of the present invention in which the metal foil is provided on one side or both sides.
- a semiconductor package can be manufactured by mounting a semiconductor on the printed wiring board of the present invention.
- the semiconductor package can be manufactured by mounting a semiconductor chip, a memory, or the like at a predetermined position of the printed wiring board of the present invention.
- Production Example 2 (Synthesis of acrylic polymers B to G) A solution of acrylic polymers B to G was obtained in the same manner as in Production Example 1 except that the monomer composition ratio in Production Example 1 was changed to the “monomer composition ratio” in Tables 2 to 4. The SP values of the acrylic polymers B to G are shown in Tables 2 to 4.
- Example 1 Among the components shown in Table 2, the components other than the component (C) are blended in the amounts shown in Table 2 (the values in the table are parts by mass of the solid content, and in the case of a solution or dispersion, the solid content equivalent amount) And 2-phenylimidazole as a component (C) was added in the amount shown in Table 2 to obtain a varnish having a nonvolatile content (solid content concentration) of 40% by mass. .
- the copper foil YGP-18 (trade name, manufactured by Nihon Electrolytic Co., Ltd.) with a thickness of 18 ⁇ m is stacked on both sides of the four prepregs so that the adhesive surface is aligned with the prepreg, and a 4MPa vacuum press at 200 ° C for 60 minutes.
- a double-sided copper-clad laminate was produced under the conditions.
- Two copper foils with resin were stacked so that the resin surfaces face each other, and a double-sided copper-clad laminate was produced at 200 ° C. for 60 minutes under a 4 MPa vacuum press condition.
- Tackiness of prepreg (presence / absence of adhesion) Evaluation of the tackiness of the prepreg is made by processing the prepared prepreg into 250 mm x 250 mm size, stacking 10 sheets, and putting them in a hermetically sealed bag into a constant temperature and humidity environment at a temperature of 25 ° C and a humidity of 70%. The presence or absence of adhesion between the prepregs was observed. After 48 hours, when the prepreg placed at the bottom and the prepreg in contact with it were peeled off and each maintained the surface before being put in, it was judged that there was no adhesion, and it was judged that there was no problem with tackiness . The results are shown in Tables 2-6.
- Storage elastic modulus at 25 ° C. Evaluation of storage elastic modulus was performed by measuring a dynamic viscoelasticity of a laminate obtained by etching a double-sided copper-clad laminate prepared from a resin-coated copper foil into a width of 5 mm and a length of 30 mm. The storage elastic modulus was calculated using an apparatus (manufactured by UBM). When the storage elastic modulus at 25 ° C. was 2.0 ⁇ 10 9 Pa or less, it was judged that the stress relaxation effect could be exhibited. Further, in order to calculate the loss coefficient tan ⁇ , the loss elastic modulus was calculated in the same manner as the storage elastic modulus. The results are shown in Tables 2-6. The loss coefficient tan ⁇ is the ratio of the loss elastic modulus (Pa) to the storage elastic modulus (Pa) (that is, loss coefficient tan ⁇ loss elastic modulus / storage elastic modulus).
- Tensile elongation rate The tensile elongation rate was evaluated by cutting a laminated plate obtained by etching a double-sided copper-clad laminate produced from a resin-coated copper foil into a width of 10 mm and a length of 100 mm to obtain an autograph (Shimadzu Corporation). Tensile elongation was calculated using If the tensile elongation at 25 ° C. was 2.4% or more, it was judged that the stress relaxation effect could be exhibited. The results are shown in Tables 2-6.
- the heat resistance was evaluated by cutting a double-sided copper-clad laminate produced from a prepreg into a 50 mm square to obtain a test piece.
- the test piece was floated in a solder bath at 260 ° C., and the time elapsed from that point until the point at which swelling of the test piece was visually observed was measured. The elapsed time was measured up to 300 seconds, and it was judged that the heat resistance was sufficient for 250 seconds or more.
- Tables 2-6 The results are shown in Tables 2-6.
- Phase structure observation test Phase structure observation was performed by smoothing the cross section of the resin insulation layer of a double-sided copper-clad laminate prepared from a resin-coated copper foil with a microtome, then lightly etching with a persulfate solution, and SEM observation The maximum width was measured for 100 island phase domains having a fine phase separation structure, and the average value was calculated. The results are shown in Tables 2-6.
- Examples 1 to 37 of the present invention are excellent in all of low elasticity, flexibility, strength, heat resistance, adhesion to metal foil, insulation reliability, and SP value. By controlling, characteristics such as low elasticity and high strength can be controlled and expressed according to the use environment and use application. On the other hand, Comparative Examples 1 to 10 are not excellent in all of low elasticity, flexibility, strength, heat resistance, adhesion to metal foil, and insulation reliability.
- the acrylic polymer was constant (acrylic polymer G, SP value 12.30), and the epoxy resin was EPICLON153 (SP value 14.15), NC-3000H (SP value 10.99), N770 ( SP value 10.55) and HP 7200 (SP value 9.69), respectively.
- the acrylic polymer was acrylic polymer C (SP value 9.83) and acrylic polymer D (SP value 10.05), respectively, and epoxy resin was FX-305 (SP value 15.1). It is what. According to this result, it turns out that it is inferior to varnish property and tack property.
- FIG. 7 is an SEM photograph showing a cross-sectional structure of a cured product obtained from the resin composition of Example 2, and it was confirmed that a sea-island structure was formed.
- FIG. 10 is a curve of the loss factor tan ⁇ of the resin composition of Example 2, and two peaks were observed. The peak on the low temperature side is a peak derived from the acrylic polymer, and the peak on the high temperature side is a peak derived from (B) the thermosetting resin. Thereby, it turns out that the sea-island structure is formed in the resin composition of Example 2.
- FIGS. 11 and 12 are curves of the loss coefficient tan ⁇ of the resin compositions in Examples 7 and 12, and two peaks are observed, indicating that a phase separation structure is formed.
- FIG. 11 and 12 are curves of the loss coefficient tan ⁇ of the resin compositions in Examples 7 and 12, and two peaks are observed, indicating that a phase separation structure is formed.
- Example 9 is a cross-sectional SEM photograph of the cured product obtained in Example 12. Although it is difficult to confirm the sea-island structure, two peaks are confirmed in the curve of the loss factor tan ⁇ , so that a phase separation structure is formed. Can be judged. Similarly to Example 12 described above, in Examples 8 and 13, it was difficult to observe the second phase domain by SEM observation, but two peaks were confirmed in the curve of the loss factor tan ⁇ . Since it can be judged that a structure is formed and the domain is not confirmed by SEM observation, it is understood that the island phase domain is formed with a nano size of less than 1 ⁇ m that is difficult to observe with SEM.
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Abstract
Description
例えば、官能基を有するアクリルポリマーと、熱硬化性樹脂を混合してなる樹脂組成物は、あたかも互いに連結しあって規則正しく分散した状態の構造であり、主成分がアクリルポリマーである海相と、主成分が熱硬化性樹脂(例えば、エポキシ樹脂)である島相との相分離構造を形成し得る。このような樹脂組成物は、アクリルポリマーと熱硬化性樹脂の双方の優れた特徴を兼ね備えることが望まれているが、十分に双方の優れた特徴を兼ね備えるものはなかった。
官能基を有するアクリルポリマーの特徴は、低弾性、高伸び率、官能基を導入し易いこと等が挙げられ、熱硬化性樹脂の特徴は、高い絶縁信頼性、高い耐熱性、高ガラス転移温度(Tg)等が挙げられる。しかしながら、使用環境及び用途に応じて、各々の特徴を制御及び発現させることは難しかった。
[1](A)アクリルポリマーと(B)熱硬化性樹脂とを含む樹脂組成物であって、(A)アクリルポリマーを含む第1相と、(B)熱硬化性樹脂を含む第2相との相分離構造を形成し、前記第2相の平均ドメインサイズが20μm以下である、樹脂組成物。
[2](A)アクリルポリマーが、下記一般式(A1)で表される(メタ)アクリル酸エステル由来の構成単位を含むアクリルポリマーである、上記[1]に記載の樹脂組成物。
(式(A1)中、R2はアルキル基、シクロアルキル基、シクロアルキルアルキル基、アリール基又はアラルキル基を示す。R1は水素原子又はメチル基を示す。)
[3](A)アクリルポリマーの溶解度パラメータ(SP値)が、9.0~12.0である、上記[1]又は[2]に記載の樹脂組成物。
[4](A)アクリルポリマーの重量平均分子量が、100,000~1,500,000である、上記[1]~[3]のいずれかに記載の樹脂組成物。
[5](A)アクリルポリマーの含有量が、樹脂組成物の固形分総量100質量部に対して、10~50質量部である、上記[1]~[4]のいずれかに記載の樹脂組成物。
[6](B)熱硬化性樹脂が、エポキシ樹脂、シアネート樹脂、ビスマレイミド類、ビスマレイミド類とジアミンとの付加重合物、フェノール樹脂、レゾール樹脂、イソシアネート樹脂、トリアリルイソシアヌレート、トリアリルシアヌレート及びビニル基含有ポリオレフィン化合物からなる群から選ばれる1種以上である、上記[1]~[5]のいずれかに記載の樹脂組成物。
[7]前記相分離構造が海島構造であり、海相が前記第1相から構成され、島相が前記第2相から構成される、上記[1]~[6]のいずれかに記載の樹脂組成物。
[8](B)熱硬化性樹脂の溶解度パラメータ(SP値)が9.0~15.0である、上記[1]~[7]のいずれかに記載の樹脂組成物。
[9](A)アクリルポリマーの溶解度パラメータ(SP値)と、(B)熱硬化性樹脂の溶解度パラメータ(SP値)との差の絶対値が、0.1~5.0である、上記[1]~[8]のいずれかに記載の樹脂組成物。
[10]上記[1]~[9]のいずれかに記載の樹脂組成物を基材に含浸及び乾燥してなる、プリプレグ。
[11]上記[1]~[9]のいずれかに記載の樹脂組成物と金属箔とを積層してなる、樹脂付き金属箔。
[12]上記[10]に記載のプリプレグ又は[11]に記載の樹脂付き金属箔を積層し加熱加圧してなる、積層板。
[13]上記[12]に記載の積層板を回路加工してなる、プリント配線板。
[14](A)アクリルポリマーと(B)熱硬化性樹脂とを含む樹脂組成物の製造方法であって、下記工程1~4を有する、樹脂組成物の製造方法。
工程1:所望する樹脂組成物の硬化物の貯蔵弾性率を決定する工程
工程2:(A)アクリルポリマーの溶解度パラメータ(SP値)と(B)熱硬化性樹脂の溶解度パラメータ(SP値)との差の絶対値Xと前記硬化物の貯蔵弾性率との相関関係に基づき、絶対値Xを特定する工程
工程3:工程2で特定した絶対値Xとなる(A)アクリルポリマー及び(B)熱硬化性樹脂を選択する工程
工程4:工程3で選択した(A)アクリルポリマー及び(B)熱硬化性樹脂を混合する工程
[15](A)アクリルポリマーと(B)熱硬化性樹脂とを含む樹脂組成物の製造方法であって、下記工程1~4を有する、樹脂組成物の製造方法。
工程1:所望する樹脂組成物の硬化物の耐熱性を決定する工程
工程2:(A)アクリルポリマーの溶解度パラメータ(SP値)と(B)熱硬化性樹脂の溶解度パラメータ(SP値)との差の絶対値Xと前記硬化物の耐熱性との相関関係に基づき、絶対値Xを特定する工程
工程3:工程2で特定した絶対値Xとなる(A)アクリルポリマー及び(B)熱硬化性樹脂を選択する工程
工程4:工程3で選択した(A)アクリルポリマー及び(B)熱硬化性樹脂を混合する工程
本発明の実施の形態に係る樹脂組成物は、(A)アクリルポリマーと(B)熱硬化性樹脂とを含む樹脂組成物であって、(A)アクリルポリマーを含む第1相と、(B)熱硬化性樹脂を含む第2相との相分離構造を形成し、前記第2相の平均ドメインサイズが20μm以下である、樹脂組成物である。
本発明の樹脂組成物が形成する相分離構造において、第1相は、(A)アクリルポリマーを含む相であり、第2相は、(B)熱硬化性樹脂を含む相であり、前記第2相の平均ドメインサイズは20μm以下である。
第2相の平均ドメインサイズを前記範囲内に調整することにより、(A)アクリルポリマーが有する低弾性、柔軟性、高伸び性等の特徴を顕著に発現したり、(B)熱硬化性樹脂が有する高弾性、高強度等の特徴を顕著に発現したり、双方の特徴を必要に応じて発現することができる。
第1相は、(A)アクリルポリマーを樹脂成分の主成分として含む相であり、第2相は、(B)熱硬化性樹脂を樹脂成分の主成分として含む相である。ここで、樹脂成分の主成分とは、樹脂成分のうち、最も高い含有量を有する樹脂を意味し、樹脂組成物の全量に対する含有量に基づき推定される。
一般的に、樹脂硬化物の相構造は相分離速度と硬化反応速度との競争反応で決定される。例えば、(A)アクリルポリマーの溶解度パラメーター(以下、「SP値」ともいう)と、(B)熱硬化性樹脂のSP値との差を小さくすることで、相分離速度が遅くなり、第2相の平均ドメインサイズを20μm以下という比較的小さい範囲にコントロールすることが可能となる。
構造式: CH3-C(=O)-CH3
員数: CH3 2個
C=O 1個
であり、表1より、
合計モル凝集エネルギー(ΔEi):(1125×2)+(4150×1)=6400
合計モル分子容量(ΔVi):(33.5×2)+(10.8×1)=77.8
となり、これを式(1)に適用して、
と溶解度パラメータ(SP値)が算出される。
なお、例えば、(B)熱硬化性樹脂としてエポキシ樹脂を使用する場合、硬化剤として、フェノール樹脂、アミン化合物等を併用することがある。その際、これらの硬化剤は、主成分ではなく、量も少ないため、(B)熱硬化性樹脂のSP値に対する影響は小さい。そのため、エポキシ樹脂と硬化剤を併用する場合のSP値の算出方法としては、硬化剤を考慮せず、エポキシ樹脂のみから算出したSP値を使用する。この扱いは、エポキシ樹脂以外の熱硬化性樹脂の場合も同様である。なお、フェノール樹脂等はエポキシ樹脂の硬化剤の中でも比較的多量に用いられるため、そのSP値が、エポキシ樹脂のSP値と近い値であることが、(B)熱硬化性樹脂のSP値を定める上で、硬化剤の影響を少なくすることができるため好ましい。実施例等に記載されているSP値は、このようにして算出した値である。
(B)熱硬化性樹脂のSP値は、9.0~15.0が好ましく、10.5~14.5がより好ましく、12.0~14.3がさらに好ましい。
(A)アクリルポリマーのSP値と、(B)熱硬化性樹脂のSP値との差の絶対値は、0.1~5.0が好ましく、0.11~4.9がより好ましく、0.12~4.8がさらに好ましく、0.13~4.7が特に好ましい。SP値の差の絶対値を、前記範囲内とすることにより、第2相の平均ドメインサイズを20μm以下という比較的小さい範囲にコントロールすることができる。
また、本発明の樹脂組成物は、(A)アクリルポリマーのSP値と、(B)熱硬化性樹脂のSP値との差の絶対値を調整することにより、得られる硬化物の物性を調整することができる。例えば、(A)アクリルポリマーのSP値と(B)熱硬化性樹脂のSP値と差の絶対値が、3.0~5.0である場合、(A)アクリルポリマーの有する柔軟性、高伸び性等の特徴を維持しつつ、(B)熱硬化性樹脂が有する高弾性、高強度等の特徴を顕著に発現する傾向にある。また、前記SP値の差の絶対値が、0.1~3.0である場合、(B)熱硬化性樹脂の有する高強度等の特徴を維持しつつ、(A)アクリルポリマーの有する低弾性、柔軟性、高伸び性等の特徴を顕著に発現する傾向にある。
なお、前記SP値の差の絶対値が、0.45以下になると、第2相の平均ドメインサイズは0.001~1.0μm程度となり、ナノサイズのドメインを形成する傾向にある。
(A)アクリルポリマーは、通常、(メタ)アクリル酸エステルをモノマーとする重合体である。
(A)アクリルポリマーは1種を単独で用いてもよいし、2種以上を併用してもよい。
なお、本発明において、「(メタ)アクリル酸」とは、「アクリル酸」と「メタクリル酸」の双方を示し、他の類似用語も同様である。
R2で示されるシクロアルキル基の炭素数は、6~13が好ましく、7~10がより好ましい。シクロアルキル基としては、シクロヘキシル基、ノルボルニル基、トリシクロデカニル基、イソボルニル基、アダマンチル基等が挙げられ、これらの中でも、ノルボルニル基、トリシクロデカニル基、イソボルニル基が好ましい。
R2で示されるシクロアルキルアルキル基の炭素数は、6~13が好ましく、7~10がより好ましい。シクロアルキルアルキル基としては、ノルボルニルメチル基、トリシクロデシルエチル基等が挙げられる。
R2で示されるアリール基の炭素数は、6~13が好ましく、6~10がより好ましい。アリール基としては、フェニル基、ノニルフェニル基等が挙げられる。
R2で示されるアラルキル基の炭素数は、7~15が好ましく、7~11がより好ましい。アラルキル基としては、ベンジル基、4-メチルベンジル基等が挙げられる。
また、一般式(A1)に示されるもの以外の(メタ)アクリル酸エステル、アクリル酸N-ビニルピロリドン、メタクリル酸N-ビニルピロリドン、N-アクリロイルモルホリン、N-メタクリロイルモルホリン、芳香族ビニル化合物、N-置換マレイミド類等の重合性モノマーを(メタ)アクリル酸エステルと共に用いて(A)アクリルポリマーを得ることもできる。
架橋性共重合体モノマーの使用量は、(メタ)アクリル酸エステルと架橋性共重合モノマーとの総量100質量部に対して、0.5~30質量部が好ましく、2~25質量部がより好ましく、3~20質量部がさらに好ましい。このような範囲とすることにより、(A)アクリルポリマーを含む第1相と(B)熱硬化性樹脂を含む第2相との間で、架橋構造が好適に形成され、耐熱性、金属箔との接着強度、絶縁信頼性等がより向上する傾向にある。
(A)アクリルポリマーの全原料モノマー中、(メタ)アクリル酸エステルと架橋性共重合モノマーとの合計含有量は、80質量%以上が好ましく、90質量%以上がより好ましく、95質量%以上がさらに好ましく、100質量%であってもよい。
(A)アクリルポリマーのエポキシ当量は、(メタ)アクリル酸グリシジルとこれと共重合可能な他のモノマーとを共重合する際、共重合比を適宜調整することで調節可能である。
エポキシ基を有する(A)アクリルポリマーの市販品としては、例えば、「HTR-860」(ナガセケムテックス株式会社製、商品名、エポキシ当量2,900g/eq)、「KH-CT-865」(日立化成株式会社製、商品名、エポキシ当量3,300g/eq)等が入手可能である。
なお、(A)アクリルポリマーは、重量平均分子量の異なる2種以上を組み合わせてもよい。この場合の(A)アクリルポリマーのSP値は、それぞれのアクリルポリマーのSP値をそれぞれの配合量により按分して算出することになる。
上記の重量平均分子量は、ゲル浸透クロマトグラフィー(GPC)分析によって測定される値であって、標準ポリスチレン換算値のことを意味する。GPC分析は、テトラヒドロフラン(THF)を溶解液として用いて行うことができる。
また、低弾性及び柔軟性の観点からは、(A)アクリルポリマーの含有量は、樹脂組成物の固形分総量100質量部に対して、20~50質量部がより好ましく、30~50質量部がさらに好ましい。
また、優れた金属箔との接着強度を得る観点からは、(A)アクリルポリマーの含有量は、樹脂組成物の固形分総量100質量部に対して、10~40質量部がより好ましく、10~30質量部がさらに好ましい。
ここで、本発明における「固形分」とは、有機溶剤等の揮発性成分を除いた不揮発分のことであり、樹脂組成物を乾燥させた際に揮発せずに残る成分を示し、室温で液状、水飴状及びワックス状のものも含む。
(B)熱硬化性樹脂としては、特に限定されないが、エポキシ樹脂、シアネート樹脂、ビスマレイミド類、ビスマレイミド類とジアミンとの付加重合物、フェノール樹脂、レゾール樹脂、イソシアネート樹脂、トリアリルイソシアヌレート樹脂、トリアリルシアヌレート樹脂、ビニル基含有ポリオレフィン化合物等が挙げられる。これらの中でも、耐熱性、絶縁性、高ガラス転移温度等の性能のバランスに優れる観点から、エポキシ樹脂(以下、「(B-1)エポキシ樹脂」ともいう)、シアネート樹脂が好ましい。(B)熱硬化性樹脂は1種を単独で用いてもよいし、2種以上を併用してもよい。
(B-1)エポキシ樹脂としては、公知のものを用いることができ、例えば、ビスフェノールA型エポキシ樹脂、ビスフェノールF型エポキシ樹脂、ビスフェノールS型エポキシ樹脂、ビフェニル型エポキシ樹脂、フェノールノボラック型エポキシ樹脂、クレゾールノボラック型エポキシ樹脂、ビスフェノールAノボラック型エポキシ樹脂、リン含有エポキシ樹脂、ナフタレン骨格含有エポキシ樹脂、アラルキレン骨格含有エポキシ樹脂、フェノールビフェニルアラルキル型エポキシ樹脂、フェノールサリチルアルデヒドノボラック型エポキシ樹脂、低級アルキル基置換フェノールサリチルアルデヒドノボラック型エポキシ樹脂、ジシクロペンタジエン骨格含有エポキシ樹脂、多官能グリシジルアミン型エポキシ樹脂、多官能脂環式エポキシ樹脂、テトラブロモビスフェノールA型エポキシ樹脂等が挙げられる。これらは1種を単独で用いてもよいし、2種以上を併用してもよい。これらの中でも、溶液化する際の(A)アクリルポリマーとの相溶性の観点から、(B-1)エポキシ樹脂は、ビスフェノールA型エポキシ樹脂を1種以上含むことが好ましい。
(B-1)エポキシ樹脂のエポキシ当量は、相溶性の観点から、150~500g/eqが好ましく、150~450g/eqがより好ましく、150~300g/eqがより好ましい。
(B)熱硬化性樹脂として、(B-1)エポキシ樹脂を用いる場合、硬化剤としては、フェノールノボラック樹脂、クレゾールノボラック樹脂、ビスフェノールAノボラック樹脂、ビフェニルノボラック型フェノール樹脂等のフェノール樹脂;ジシアンジアミド、ジアミノジフェニルメタン、ジアミノジフェニルスルフォン等のアミン系硬化剤;無水ピロメリット酸、無水トリメリット酸、ベンゾフェノンテトラカルボン酸等の酸無水物硬化剤;これらの混合物などが挙げられる。
本発明の樹脂組成物では、(B)熱硬化性樹脂として(B-1)エポキシ樹脂を含むと共に、金属箔との密着強度確保の観点から、硬化剤として、(B-2)フェノール樹脂を含むことが好ましい。
なお、上記(B)熱硬化性樹脂の含有量には、(B-2)フェノール樹脂等の硬化剤の含有量も含まれる。
また、本発明の樹脂組成物中における、(A)アクリルポリマーと(B)熱硬化性樹脂との質量比((A)アクリルポリマー:(B)熱硬化性樹脂)は、10:90~90:10が好ましく、20:80~80:20がより好ましく、30:70~70:30がさらに好ましく、40:60~60:40が特に好ましい。質量比((A)アクリルポリマー:(B)熱硬化性樹脂)が前記範囲内であると、(A)アクリルポリマー及び(B)熱硬化性樹脂の双方の特徴が十分に発現される相分離構造が得られる傾向にある。
本発明の樹脂組成物は、(B)熱硬化性樹脂の種類に応じて、(C)硬化促進剤を含んでいてもよい。
(B)熱硬化性樹脂が(B-1)エポキシ樹脂である場合、(C)硬化促進剤としては、特に限定されないが、アミン類又はイミダゾール類が好ましい。アミン類としては、ジシアンジアミド、ジアミノジフェニルエタン、グアニル尿素等が挙げられる。イミダゾール類としては、2-フェニルイミダゾール、1-シアノエチル-2-メチルイミダゾール、1-シアノエチル-2-ウンデシルイミダゾール、1-シアノエチル-2-フェニルイミダゾール、1-シアノエチル-2-フェニルイミダゾリウムトリメリテイト、ベンゾイミダゾール等が挙げられる。
本発明の樹脂組成物中における(C)硬化促進剤の含有量は、樹脂組成物の固形分総量100質量部に対して、0.01~10質量部が好ましく、0.05~2質量部がより好ましく、0.07~0.5質量部がさらに好ましい。なお、(B)熱硬化性樹脂が(B-1)エポキシ樹脂である場合、(C)硬化促進剤の含有量は、樹脂組成物中のオキシラン環の総量に応じて決定することができる。
本発明の樹脂組成物は、(D)フィラーを含んでいてもよい。(D)フィラーとしては、特に限定されないが、熱膨張率の低減及び難燃性を確保する観点から、無機フィラーが好ましい。無機フィラーとしては、シリカ、アルミナ、酸化チタン、水酸化アルミニウム、水酸化マグネシウム、炭酸カルシウム、炭酸マグネシウム、ケイ酸カルシウム、酸化カルシウム、酸化マグネシウム、窒化アルミニウム、ほう酸アルミウイスカ、窒化ホウ素、炭化ケイ素等が挙げられる。これらは1種を単独で用いてもよいし、2種以上を併用してもよい。これらの中でも、誘電率が低いこと、線膨張率が低いこと等からシリカが好ましい。シリカとしては、湿式法又は乾式法で合成された合成シリカ、破砕シリカ、溶融シリカ等が挙げられる。
ここで、本発明における平均粒径とは、粒子の全体積を100%として粒子径による累積度数分布曲線を求めたとき、体積50%に相当する点の粒子径のことであり、レーザ回折散乱法を用いた粒度分布測定装置等で測定することができる。
(D-1)成分の平均粒径は、0.1~1.5μmが好ましく、0.2~1.2μmがより好ましく、0.3~1.0μmがさらに好ましい。(D-1)成分の平均粒径が0.1μm以上であると、ワニス化した際にフィラーが分散し易くなり凝集が発生し難い傾向にあり、1.5μm以下であると、ワニス化の際に(D)フィラーの沈降が発生し難い傾向にある。
(D-2)成分の平均粒径は、1.0~3.5μmが好ましく、1.2~3.2μmがより好ましく、1.4~3.0μmがさらに好ましい。(D-2)成分の平均粒径が1.0μm以上であると、フィラーが分散し易くなり凝集が発生し難い傾向にあり、3.5μm以下であるとワニス化の際にフィラーの沈降が発生し難い傾向にある。
(D-1)成分及び(D-2)成分を併用する場合、その質量比[(D-1):(D-2)]は、10:90~90:10が好ましく、20:80~80:20がより好ましく、30:70~70:30がさらに好ましい。配合比が上記範囲内であると、(A)アクリルポリマー及び(B)熱硬化性樹脂の双方の特徴を十分に発現される傾向にある。
図13(a)及び(b)に、本発明の樹脂組成物から得られたフィラーを含有する硬化物の断面SEM写真を示す。なお、図13(b)は、図13(a)の領域Aを拡大したものである。図13(a)及び(b)から、海相((A)アクリルポリマー)1中には(D)フィラー3が存在し、島相((B)熱硬化性樹脂)2中には(D)フィラー4が存在しており、第1相又は第2相のいずれにも(D)フィラーが存在する相分離構造が得られていることが分かる。
本発明の樹脂組成物には、必要に応じて、イソシアネート樹脂、メラミン樹脂等の架橋剤;リン系化合物等の難燃剤;ゴム系エラストマー、導電性粒子、カップリング剤、流動調整剤、酸化防止剤、顔料、レベリング剤、消泡剤、イオントラップ剤などを含んでいてもよい。これらのその他の成分は、公知のものを使用できる。
ワニス中の固形分濃度は、10~70質量%が好ましく、20~60質量%がより好ましく、30~50質量%がさらに好ましい。
本発明の樹脂組成物は、(A)アクリルポリマーを含む第1相と、(B)熱硬化性樹脂を含む第2相との相分離構造を形成するものである。
本発明における相分離構造とは、海島構造、連続球状構造、複合分散相構造又は共連続相構造である。これらの相分離構造については、例えば、「ポリマーアロイ」第325頁(1993)東京化学同人に、連続球状構造については、例えば、Keizo Yamanaka and Takashi Iniue,POLYMER,Vol.30,pp.662(1989)に詳しく述べられている。
図1~図4に、それぞれ連続球状構造、海島構造、複合分散相構造、共連続相構造を表すモデル図を示す。
本願発明の樹脂組成物から海島構造が形成される場合、(A)アクリルポリマーが海相、(B)熱硬化性樹脂が島相を形成する。(A)アクリルポリマーが島相ではなくて海相を形成する理由については、分子量が大きくて絡み合いが多い(A)アクリルポリマー中で(B)熱硬化性樹脂の相分離が起こる際、(A)アクリルポリマーが島相となるためには、その絡み合い、架橋網目等を切断しなくてはならず、島相になり難いためであると考えられる。
図5に、実施例6の樹脂組成物において(D)フィラーを除いた配合系で得られた、海島構造を有する樹脂組成物の断面構造を表す電子顕微鏡写真を示す。
図6に、実施例6で得られる複合分散相構造を有する樹脂組成物の断面構造を表す電子顕微鏡写真を示す。
第2相の平均ドメインサイズを上記範囲に調整することにより、(A)アクリルポリマーが有する低弾性、柔軟性、高伸び性等の特徴を顕著に発現させたり、(B)熱硬化性樹脂が有する高弾性、高強度等の特徴を顕著に発現させたり、双方の特徴を必要に応じて発現させることができる。
例えば、第2相の平均ドメインサイズが10μm以下であると、(A)アクリルポリマーと(B)熱硬化性樹脂とが、見かけ上相溶に近い構造となり、絡み合った(A)アクリルポリマーの網目に(B)熱硬化性樹脂がナノサイズで分散しているため、(A)アクリルポリマーの低弾性、柔軟性、高伸び性等の特性をより顕著に発現でき、更に、相分離構造が複雑になることで金属箔との接着強度も高くなる傾向にある。
また、第2相の平均ドメインサイズが10~20μmであると、(B)熱硬化性樹脂の高弾性、高強度等の特性をより顕著に発現できると共に、(A)アクリルポリマーが有する低弾性を発現でき、金属箔との接着面積が十分に得られ、金属箔との接着強度が優れる傾向にある。
上記のように、第2相の平均ドメインサイズは、所望する特性に応じて調整することができるが、(A)アクリルポリマーに由来する特性と(B)熱硬化性樹脂に由来する特性をバランス良く発現させる観点からは、第2相の平均ドメインサイズは、0.001~20μmであってもよく、0.1~15μmであってもよく、1~10μmであってもよい。
図10~12には、実施例2、7及び12で得られた樹脂組成物の損失係数tanδ曲線を示す。図10~12において、30~70℃付近のピークは、(A)アクリルポリマーに由来するピークであり、150~200℃付近のピークは、(B)熱硬化性樹脂に由来するピークである。これらのピークの存在により、樹脂組成物が相分離構造を形成していることが分かる。
平均ドメインサイズが20μmを超えるドメインはSEM観察で確認できることから、前記SEM観察で相分離構造が確認されず、かつ損失係数tanδ曲線で上記のように2つのピークが確認される場合は、平均ドメインサイズが20μm以下の第2相が形成されていると判断することができる。
なお、tanδ曲線は、より詳細には、実施例に記載の方法により測定することができる。
本発明の樹脂組成物が(D)フィラーを含有しない場合、海島構造又は連続球状構造が形成されるが、(D)フィラーを含有する場合、微細な共連続相構造又は複合分散相構造が形成され得る。
本発明の樹脂組成物から得られる硬化物の貯蔵弾性率は、応力緩和効果を発現させる観点から、2.0×109Pa以下が好ましく、1.9×109Pa以下がより好ましく、1.8×109Pa以下がさらに好ましい。貯蔵弾性率は、例えば、(D)フィラーの含有量を調整することにより上記範囲内とすることができ、このような観点からも、(D)フィラーの含有量は、前記範囲内であることが好ましい。また、硬化物の貯蔵弾性率は実施例に記載の方法により測定することができる。
本発明の樹脂組成物は、例えば、下記工程1~4を有する製造方法によって製造することができる。
工程1:所望する樹脂組成物の硬化物の物性を決定する工程
工程2:(A)アクリルポリマーの溶解度パラメータ(SP値)と(B)熱硬化性樹脂の溶解度パラメータ(SP値)との差の絶対値Xと前記硬化物の物性との相関関係に基づき、絶対値Xを特定する工程
工程3:工程2で特定した絶対値Xとなる(A)アクリルポリマー及び(B)熱硬化性樹脂を選択する工程
工程4:工程3で選択した(A)アクリルポリマー及び(B)熱硬化性樹脂を混合する工程
工程2においては、(A)アクリルポリマーの溶解度パラメータ(SP値)と(B)熱硬化性樹脂の溶解度パラメータ(SP値)との差の絶対値Xと前記硬化物の物性(例えば、貯蔵弾性率、耐熱性等)との相関関係に基づき、絶対値Xを特定する。ここで、絶対値Xは、小さい程、相分離速度が遅くなり、(A)アクリルポリマーと(B)熱硬化性樹脂との相溶性が高い硬化物となり、結果として、(A)アクリルポリマーの特徴である低弾性が得られる傾向にある。一方、絶対値Xは、大きいほど、相分離速度が速くなり、(A)アクリルポリマーと(B)熱硬化性樹脂との相分離が顕著な硬化物となり、結果として、(B)熱硬化性樹脂の特徴である、耐熱性、機械強度に優れる硬化物が得られる傾向にある。
なお、絶対値Xと硬化物の物性との相関関係は、事前に複数の組成において絶対値Xと硬化物の物性を取得することで決定することができる。
工程3では、工程2で特定した絶対値Xとなる(A)アクリルポリマー及び(B)熱硬化性樹脂を選択する。(A)アクリルポリマー及び(B)熱硬化性樹脂のSP値は、前記したFedors法等から計算できるため、求める絶対値Xとなるように、(A)アクリルポリマー及び(B)熱硬化性樹脂の構造を決定すればよい。
工程4では、工程3で選択した(A)アクリルポリマー及び(B)熱硬化性樹脂を混合する。混合する方法は、従来公知の攪拌機等を適用することができる。
本発明のプリプレグは、本発明の樹脂組成物を基材に含浸し、乾燥してなるものである。プリプレグは、例えば、ワニス状の本発明の樹脂組成物を基材に含浸させ、乾燥させて製造することができる。
基材としては、通常、織布、不織布等の繊維基材が用いられる。繊維基材の材質としては、例えば、ガラス、アルミナ、アスベスト、ボロン、シリカアルミナガラス、シリカガラス、チラノ、炭化ケイ素、窒化ケイ素、ジルコニア等の無機繊維;アラミド、ポリエーテルエーテルケトン、ポリエーテルイミド、ポリエーテルサルフォン、カーボン、セルロース等の有機繊維;これらの混抄系などが挙げられる。
基材の厚さは、10~100μmが好ましく、20~50μmがより好ましい。厚さ50μm以下の基材を用いることで、任意に折り曲げ可能なプリント配線板を得ることができ、製造プロセス上での温度、吸湿等に伴う寸法変化を小さくすることができる。
本発明の樹脂付き金属箔は、本発明の樹脂組成物と金属箔とを積層してなるものである。樹脂付き金属箔は、例えば、本発明の樹脂組成物を金属箔に塗工し、乾燥させることで樹脂付き金属箔を製造することができる。乾燥条件は、例えば、80~180℃で乾燥させて製造することができる。
本発明の積層板は、本発明のプリプレグ又は本発明の樹脂付き金属箔を積層し加熱加圧してなる積層板である。なお、金属箔を配置した積層板を「金属張積層板」と称することがある。
金属張積層板は、例えば、本発明のプリプレグを複数枚積層した積層体の両側の接着面と金属箔とを合わせるように重ね、真空プレス条件にて、通常、130~250℃、好ましくは150~230℃で、圧力0.5~10MPa、好ましくは1~5MPaで加熱加圧成形することによって製造することができる。他の金属張積層板の製造方法としては、本発明の樹脂付き金属箔の樹脂面同士が向き合うように2枚重ね、真空プレスにてプレスすることによって製造することができる。加熱加圧は、例えば、多段プレス、多段真空プレス、連続成形、オートクレーブ成形機等を使用することができる。
本発明のプリント配線板は、本発明の積層板を回路加工してなるものである。本発明のプリント配線板は、例えば、片面又は両面に金属箔が設けられた本発明の積層板(金属張積層板)の金属箔に回路(配線)加工を施すことによって製造することができる。
さらに、本発明のプリント配線板に半導体を搭載することにより半導体パッケージを製造することもできる。半導体パッケージは、本発明のプリント配線板の所定の位置に、半導体チップ、メモリ等を搭載して製造することができる。
製造例1
(アクリルポリマーAの合成)
攪拌機及びコンデンサを備えたオートクレーブ中に、モノマーとして、メタクリル酸2-エチルヘキシル(2-EHMA)35.0質量部、メタクリル酸n-ブチル(n-BMA)60.0質量部、メタクリル酸グリシジル(GMA)5.0質量部を仕込み、懸濁剤及びイオン交換水を加えて攪拌し、窒素雰囲気下において65℃で2時間、次いで105℃で2時間重合させ、樹脂粒子を得た。この樹脂粒子を水洗、脱水及び乾燥し、メチルエチルケトンに加熱残分が30質量%となるように溶解させ、アクリルポリマーAの溶液を得た。アクリルポリマーAのSP値は9.45であった。
(アクリルポリマーB~Gの合成)
製造例1において、モノマー組成比を、表2~4中の「モノマー組成比」となるように変更した以外は、製造例1と同様にして、アクリルポリマーB~Gの溶液を得た。アクリルポリマーB~GのSP値を、表2~4に示す。
実施例1
表2に示す各成分のうち、(C)成分以外の各成分を、表2に示す配合量(表中の数値は固形分の質量部であり、溶液又は分散液の場合は固形分換算量である。)で配合し、メチルイソブチルケトンに溶解後、(C)成分として2-フェニルイミダゾールを表2に示す配合量で配合し、不揮発分(固形分濃度)40質量%のワニスを得た。
実施例1において、配合組成を表2~6に示す通りに変更した以外は、実施例1と同様にしてワニスを得た。
各例で作製したワニスを、厚さ0.028mmのガラスクロス1037(旭シュエーベル株式会社製、商品名)に含浸後、140℃にて10分間加熱して乾燥させ、プリプレグを得た。
各例で作製したワニスを、厚さ18μmの電解銅箔YGP-18(日本電解株式会社製、商品名)に塗工機により塗工し、140℃にて約6分間熱風乾燥させ、樹脂組成物層の厚さが50μmの樹脂付き銅箔を作製した。
4枚重ねたプリプレグの両側に厚さ18μmの電解銅箔YGP-18(日本電解株式会社製、商品名)を接着面がプリプレグと合わさるように重ね、200℃にて60分間、4MPaの真空プレス条件で両面銅張積層板を作製した。また、樹脂付き銅箔は樹脂面同士が向き合うように2枚重ね、200℃にて60分間、4MPaの真空プレス条件で両面銅張積層板を作製した。
(1)ワニス性(成分の相溶性)
ワニス性(成分の相溶性)の評価は、作製したワニスを透明な容器に受け、24時間後の外観を目視により観察し、ワニス中の成分の分離と、沈降物について観察した。
ワニスの色相が均一であれば分離なしと判断し、色相にムラが確認された場合は分離ありと判断した。
また、容器に沈降物の堆積が目視で確認できない場合は、沈降物なしと判断し、堆積が目視で確認された場合は沈降物ありと判断した。結果を表2~6に示す。表2~6において、成分の分離及び沈降物がいずれもなかったものを「なし」と表記した。
ワニス性(粘度)の評価は、作製したワニスをカップに入れ、ウォーターバスを用いてワニス温度を30℃に調整し、その後、BL型粘度計(東機産業株式会社製)を用いて粘度を算出した。30℃の粘度が800mPa・s以下であれば、プリプレグの製造に問題なしと判断した。結果を表2~6に示す。
プリプレグのタック性の評価は、作製したプリプレグを250mm×250mmサイズに加工して10枚重ね、密封封入可能な袋に入れたものを、温度25℃、湿度70%の恒温恒湿環境に投入し、プリプレグ同士の密着発生有無を観察した。48時間経過後に、一番下に配置したプリプレグとそれと接するプリプレグが剥がれ、各々が投入前の表面を維持している場合は、密着発生「なし」と判断し、タック性が問題ないと判断した。結果を表2~6に示す。
プリプレグの外観(凝集物の有無)の評価は、20倍の拡大鏡を用いて凝集物の発生について観察した。凝集物が観察されなかったものは「なし」と表記した。結果を表2~6に示す。
貯蔵弾性率の評価は、樹脂付き銅箔から作製した両面銅張積層板を全面エッチングした積層板を、幅5mm×長さ30mmに切断し、動的粘弾性測定装置(株式会社UBM製)を用いて貯蔵弾性率を算出した。25℃の貯蔵弾性率が2.0×109Pa以下であれば応力緩和効果を発現可能と判断した。また、損失係数tanδを算出するために、貯蔵弾性率と同様に、損失弾性率を算出した。結果を表2~6に示す。
なお、損失係数tanδとは貯蔵弾性率(Pa)に対する損失弾性率(Pa)の比(すなわち、損失係数tanδ=損失弾性率/貯蔵弾性率)である。
引張り強度の評価は、樹脂付き銅箔から作製した両面銅張積層板を全面エッチングした積層板を、幅10mm×長さ100mmに切断し、オートグラフ(株式会社島津製作所製)を用いて引張り強度を算出した。25℃の引張り強度が10×109Pa以上であれば強度が十分であると判断した。結果を表2~6に示す。
引張り伸び率の評価は、樹脂付き銅箔から作製した両面銅張積層板を全面エッチングした積層板を、幅10mm×長さ100mmに切断し、オートグラフ(株式会社島津製作所製)を用いて引張り伸び率を算出した。25℃の引張り伸び率が2.4%以上であれば応力緩和効果を発現可能と判断した。結果を表2~6に示す。
耐熱性の評価は、プリプレグから作製した両面銅張積層板を50mm四方の正方形に切り出して試験片を得た。その試験片を260℃のはんだ浴中に浮かべて、その時点から試験片の膨れが目視で認められる時点までに経過した時間を測定した。経過時間の測定は300秒までとし、250秒以上は耐熱性が十分であると判断した。結果を表2~6に示す。
基板に対する金属箔接着性の評価は、プリプレグから作製した両面銅張積層板の銅箔を部分的にエッチングして、3mm幅の銅箔ラインを形成した。次に、銅箔ラインを、接着面に対して90°方向に50mm/分の速度で引き剥がした際の荷重を測定し、銅箔引き剥がし強さとした。銅箔引き剥がし強さが0.5kN/m以上であれば金属箔との接着性は十分であると判断した。結果を表2~6に示す。
相構造観察は、樹脂付き銅箔から作製した両面銅張積層板の樹脂絶縁層の断面をミクロトームにて平滑化した後、過硫酸塩溶液で軽くエッチングし、SEM観察を行い、微細相分離構造の島相のドメインを100個について、最大幅をそれぞれ測定し、その平均値を算出した。結果を表2~6に示す。
電気絶縁信頼性は、プリプレグから作製した両面銅張積層板をスルーホール穴壁間隔が350μmとなるよう加工したテストパターンを用いて、各試料について400穴の絶縁抵抗を経時的に測定した。測定条件は、85℃/85%RH雰囲気中、100V印加して行い、導通破壊が発生するまでの時間を測定した。測定時間は2000時間までとし、2000時間以上は電気絶縁信頼性が十分であると判断した。結果を表2~6に示す。
[(A)成分]
・KH-CT-865:一般式(A1)で表される化合物として、エステル部分に炭素数5~10のシクロアルキル基を有するメタクリル酸エステルを含有し、かつ構造中にニトリル基を含まないアクリルポリマー(日立化成株式会社製、商品名、重量平均分子量Mw=45×104~65×104、エポキシ当量:3,300g/eq)
・HTR-860:構造中にニトリル基を含まないアクリルポリマー(ナガセケムテックス株式会社製、商品名、重量平均分子量Mw=80×104、エポキシ当量:2,900g/eq)
・HAN5-M90S:構造中にニトリル基を含むアクリルポリマー(根上工業株式会社製、商品名、重量平均分子量Mw=90×104)
[(B)成分]
・NC-3000-H:ビフェニルアラルキル型エポキシ樹脂(日本化薬株式会社製、商品名、エポキシ当量290g/mol)
・EPICLON 153:テトラブロモビスフェノールA型エポキシ樹脂(DIC株式会社製、商品名、エポキシ当量400g/mol)
・N770:フェノールノボラック型エポキシ樹脂(DIC株式会社製、商品名)
・HP-7200:ジシクロペンタジエン型エポキシ樹脂(DIC株式会社製、商品名)
・FX-305:リン含有エポキシ樹脂(新日鉄住金化学株式会社製、商品名)
・KA-1165:クレゾールノボラック樹脂(DIC株式会社製、商品名、SP値:12.76、フェノール水酸基当量119g/mol)
・LA-7054:アミノトリアジンノボラック型フェノール樹脂(DIC株式会社製、商品名)
・4005P:ビスフェノールF型エポキシ樹脂(三菱化学株式会社製、商品名)
[(D)成分]
・F05-12:破砕シリカ(福島窯業株式会社製、商品名、平均粒子径2.5μm)
・F05-30:破砕シリカ(福島窯業株式会社製、商品名、平均粒子径4.2μm)
・HK-001:水酸化アルミニウム(河合石灰株式会社製、商品名、平均粒子径4.0μm)
・SC-2050KC:シランカップリング処理をした溶融球状シリカ(株式会社アドマテック製、商品名、平均粒子径0.5μm)
[カップリング剤]
・A-187:γ-グリシドキシプロピルトリメトキシシラン(モメンティブ・パフォーマンス・マテリアルズ株式会社製、商品名)
比較例1~4は、アクリルポリマーを一定(アクリルポリマーF、SP値12.10)として、エポキシ樹脂を、EPICLON153(SP値14.15)、NC-3000H(SP値10.99)、N770(SP値10.55)、HP7200(SP値9.69)に、それぞれ変更したものである。その結果、島相の平均ドメインサイズが20μmを超え、引張り伸び率及び電気絶縁信頼性に劣ることが分かる。
比較例5~8も、アクリルポリマーを一定(アクリルポリマーG、SP値12.30)として、エポキシ樹脂を、EPICLON153(SP値14.15)、NC-3000H(SP値10.99)、N770(SP値10.55)、HP7200(SP値9.69)に、それぞれ変更したものである。その結果、島相の平均ドメインサイズが20μmを超え、タック性、外観、耐熱性、島相ドメインサイズ及び電気絶縁信頼性に劣ることが分かる。
比較例9~10は、アクリルポリマーを、それぞれ、アクリルポリマーC(SP値9.83)、アクリルポリマーD(SP値10.05)として、エポキシ樹脂を、FX-305(SP値15.1)としたものである。この結果によると、ワニス性及びタック性に劣ることが分かる。
図10は、実施例2の樹脂組成物の損失係数tanδの曲線であり、2つのピークが観察された。低温側のピークはアクリルポリマーに由来するピークであり、高温側のピークは(B)熱硬化性樹脂に由来するピークである。これにより、実施例2の樹脂組成物は海島構造が形成されていることが分かる。
図11及び図12は、実施例7及び12における樹脂組成物の損失係数tanδの曲線であり、それぞれ2つのピークが観察されることから、相分離構造が形成されていることが分かる。
図9は実施例12で得られた硬化物の断面SEM写真であり、海島構造の確認は困難であるが、損失係数tanδの曲線において2つのピークが確認されることから相分離構造が形成されていると判断できる。
上述した実施例12と同様、実施例8及び13においても、SEM観察では第2相のドメインの観察は困難であったが、損失係数tanδの曲線において2つのピークが確認されることから相分離構造が形成されていると判断でき、SEM観察によりドメインが確認されなかったことから、島相ドメインは、SEMで観察することが困難な1μm未満のナノサイズで形成されていることが分かる。
1 海相
2 島相
3 海相に存在するフィラー
4 島相に存在するフィラー
Claims (15)
- (A)アクリルポリマーと(B)熱硬化性樹脂とを含む樹脂組成物であって、(A)アクリルポリマーを含む第1相と、(B)熱硬化性樹脂を含む第2相との相分離構造を形成し、前記第2相の平均ドメインサイズが20μm以下である、樹脂組成物。
- (A)アクリルポリマーの溶解度パラメータ(SP値)が、9.0~12.0である、請求項1又は2に記載の樹脂組成物。
- (A)アクリルポリマーの重量平均分子量が、100,000~1,500,000である、請求項1~3のいずれか1項に記載の樹脂組成物。
- (A)アクリルポリマーの含有量が、樹脂組成物の固形分総量100質量部に対して、10~50質量部である、請求項1~4のいずれか1項に記載の樹脂組成物。
- (B)熱硬化性樹脂が、エポキシ樹脂、シアネート樹脂、ビスマレイミド類、ビスマレイミド類とジアミンとの付加重合物、フェノール樹脂、レゾール樹脂、イソシアネート樹脂、トリアリルイソシアヌレート、トリアリルシアヌレート及びビニル基含有ポリオレフィン化合物からなる群から選ばれる1種以上である、請求項1~5のいずれか1項に記載の樹脂組成物。
- 前記相分離構造が海島構造であり、海相が前記第1相から構成され、島相が前記第2相から構成される、請求項1~6のいずれか1項に記載の樹脂組成物。
- (B)熱硬化性樹脂の溶解度パラメータ(SP値)が9.0~15.0である、請求項1~7のいずれか1項に記載の樹脂組成物。
- (A)アクリルポリマーの溶解度パラメータ(SP値)と、(B)熱硬化性樹脂の溶解度パラメータ(SP値)との差の絶対値が、0.1~5.0である、請求項1~8のいずれか1項に記載の樹脂組成物。
- 請求項1~9のいずれか1項に記載の樹脂組成物を基材に含浸及び乾燥してなる、プリプレグ。
- 請求項1~9のいずれか1項に記載の樹脂組成物と金属箔とを積層してなる、樹脂付き金属箔。
- 請求項10に記載のプリプレグ又は請求項11に記載の樹脂付き金属箔を積層し加熱加圧してなる、積層板。
- 請求項12に記載の積層板を回路加工してなる、プリント配線板。
- (A)アクリルポリマーと(B)熱硬化性樹脂とを含む樹脂組成物の製造方法であって、下記工程1~4を有する、樹脂組成物の製造方法。
工程1:所望する樹脂組成物の硬化物の貯蔵弾性率を決定する工程
工程2:(A)アクリルポリマーの溶解度パラメータ(SP値)と(B)熱硬化性樹脂の溶解度パラメータ(SP値)との差の絶対値Xと前記硬化物の貯蔵弾性率との相関関係に基づき、絶対値Xを特定する工程
工程3:工程2で特定した絶対値Xとなる(A)アクリルポリマー及び(B)熱硬化性樹脂を選択する工程
工程4:工程3で選択した(A)アクリルポリマー及び(B)熱硬化性樹脂を混合する工程 - (A)アクリルポリマーと(B)熱硬化性樹脂とを含む樹脂組成物の製造方法であって、下記工程1~4を有する、樹脂組成物の製造方法。
工程1:所望する樹脂組成物の硬化物の耐熱性を決定する工程
工程2:(A)アクリルポリマーの溶解度パラメータ(SP値)と(B)熱硬化性樹脂の溶解度パラメータ(SP値)との差の絶対値Xと前記硬化物の耐熱性との相関関係に基づき、絶対値Xを特定する工程
工程3:工程2で特定した絶対値Xとなる(A)アクリルポリマー及び(B)熱硬化性樹脂を選択する工程
工程4:工程3で選択した(A)アクリルポリマー及び(B)熱硬化性樹脂を混合する工程
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| US16/300,692 US20190161586A1 (en) | 2016-05-13 | 2017-05-15 | Resin composition, prepreg, metal foil with resin, laminate, printed wiring board, and method for producing resin composition |
| EP17796260.2A EP3456779B1 (en) | 2016-05-13 | 2017-05-15 | Prepreg, metal foil with resin, laminate and printed wiring board |
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| CN201780028107.9A CN109153837B (zh) | 2016-05-13 | 2017-05-15 | 树脂组合物、预浸渍体、带树脂的金属箔、层叠板、印刷配线板以及树脂组合物的制造方法 |
| JP2018517101A JP6969545B2 (ja) | 2016-05-13 | 2017-05-15 | 樹脂組成物、プリプレグ、樹脂付き金属箔、積層板、プリント配線板及び樹脂組成物の製造方法 |
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- 2017-05-15 IL IL262895A patent/IL262895B2/en unknown
- 2017-05-15 WO PCT/JP2017/018157 patent/WO2017195902A1/ja not_active Ceased
- 2017-05-15 TW TW106115991A patent/TWI812589B/zh active
- 2017-05-15 KR KR1020187031995A patent/KR102317288B1/ko active Active
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| JPWO2020157805A1 (ja) * | 2019-01-28 | 2021-11-25 | 昭和電工マテリアルズ株式会社 | 接着剤組成物、フィルム状接着剤、接着シート、及び半導体装置の製造方法 |
| JP7327416B2 (ja) | 2019-01-28 | 2023-08-16 | 株式会社レゾナック | 接着剤組成物、フィルム状接着剤、接着シート、及び半導体装置の製造方法 |
| WO2020157805A1 (ja) * | 2019-01-28 | 2020-08-06 | 日立化成株式会社 | 接着剤組成物、フィルム状接着剤、接着シート、及び半導体装置の製造方法 |
| KR20220123259A (ko) | 2020-02-05 | 2022-09-06 | 소켄 케미칼 앤드 엔지니어링 캄파니, 리미티드 | 에폭시 수지 조성물 및 수지 경화물 |
| JPWO2022054874A1 (ja) * | 2020-09-11 | 2022-03-17 | ||
| WO2022054874A1 (ja) * | 2020-09-11 | 2022-03-17 | 富士フイルム株式会社 | 硬化性樹脂組成物、熱伝導材料、熱伝導シート、熱伝導層付きデバイス |
| JP2023010635A (ja) * | 2021-07-09 | 2023-01-20 | 三洋化成工業株式会社 | エポキシ樹脂用粘度調整剤、エポキシ樹脂組成物、硬化性組成物、プリプレグ及び繊維強化複合材料 |
| JP7826867B2 (ja) | 2021-07-09 | 2026-03-10 | 三洋化成工業株式会社 | エポキシ樹脂用粘度調整剤、エポキシ樹脂組成物、硬化性組成物、プリプレグ及び繊維強化複合材料 |
| KR20240095198A (ko) | 2021-11-01 | 2024-06-25 | 가부시끼가이샤 레조낙 | 수지 조성물, 프리프레그, 적층판, 금속 접착 적층판, 프린트 배선판 및 반도체 패키지 |
| WO2024004526A1 (ja) * | 2022-06-30 | 2024-01-04 | パナソニックIpマネジメント株式会社 | 窒化ホウ素材料およびその応用製品 |
| JP2024024907A (ja) * | 2022-08-10 | 2024-02-26 | デンカ株式会社 | 硬化性組成物、硬化物および接合体 |
| WO2024241821A1 (ja) | 2023-05-22 | 2024-11-28 | 株式会社レゾナック | 樹脂組成物、プリプレグ、積層板、プリント配線板及び半導体パッケージ |
| KR20250171372A (ko) | 2023-05-22 | 2025-12-08 | 가부시끼가이샤 레조낙 | 수지 조성물, 프리프레그, 적층판, 프린트 배선판 및 반도체 패키지 |
| EP4717734A1 (en) | 2023-05-22 | 2026-04-01 | Resonac Corporation | Resin composition, prepreg, laminated plate, printed wiring board, and semiconductor package |
| WO2025028469A1 (ja) * | 2023-08-02 | 2025-02-06 | 株式会社レゾナック | 樹脂組成物、プリプレグ、積層板、金属張り積層板、プリント配線板及び半導体パッケージ |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2022003144A (ja) | 2022-01-11 |
| US20210079172A1 (en) | 2021-03-18 |
| US20190161586A1 (en) | 2019-05-30 |
| EP3456779A4 (en) | 2020-01-15 |
| TW201817797A (zh) | 2018-05-16 |
| IL262895A (en) | 2018-12-31 |
| CN109153837A (zh) | 2019-01-04 |
| US11691389B2 (en) | 2023-07-04 |
| JPWO2017195902A1 (ja) | 2019-03-14 |
| JP7287432B2 (ja) | 2023-06-06 |
| EP3456779B1 (en) | 2023-03-01 |
| JP6969545B2 (ja) | 2021-11-24 |
| CN109153837B (zh) | 2022-08-05 |
| TWI812589B (zh) | 2023-08-21 |
| KR20190008526A (ko) | 2019-01-24 |
| IL262895B1 (en) | 2023-07-01 |
| IL262895B2 (en) | 2023-11-01 |
| TW202216888A (zh) | 2022-05-01 |
| EP3456779A1 (en) | 2019-03-20 |
| KR102317288B1 (ko) | 2021-10-25 |
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