WO2020045150A1 - リン含有エポキシ樹脂、エポキシ樹脂組成物、プリプレグ、積層板、回路基板用材料および硬化物 - Google Patents
リン含有エポキシ樹脂、エポキシ樹脂組成物、プリプレグ、積層板、回路基板用材料および硬化物 Download PDFInfo
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/02—Polycondensates containing more than one epoxy group per molecule
- C08G59/04—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof
- C08G59/06—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols
- C08G59/063—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols with epihalohydrins
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- 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
- C08G59/14—Polycondensates modified by chemical after-treatment
- C08G59/1433—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds
- C08G59/1488—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds containing phosphorus
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- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/02—Polycondensates containing more than one epoxy group per molecule
- C08G59/04—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof
- C08G59/06—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols
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- 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
- C08G59/32—Epoxy compounds containing three or more epoxy groups
- C08G59/3254—Epoxy compounds containing three or more epoxy groups containing atoms other than carbon, hydrogen, oxygen or nitrogen
- C08G59/3272—Epoxy compounds containing three or more epoxy groups containing atoms other than carbon, hydrogen, oxygen or nitrogen containing phosphorus
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- 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
- C08G59/4021—Ureas; Thioureas; Guanidines; Dicyandiamides
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- 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
- C08G59/50—Amines
- C08G59/5046—Amines heterocyclic
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- 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
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- 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
- C08J5/241—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs using inorganic fibres
- C08J5/244—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs using inorganic fibres using glass fibres
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- 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
- C08J5/249—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs characterised by the additives used in the prepolymer mixture
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
- C08L63/04—Epoxynovolacs
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- 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
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- 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
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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
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
- C08J2363/04—Epoxynovolacs
Definitions
- the present invention is a copper-clad laminate used for an electronic circuit board, a film material, an epoxy resin composition for producing a resin-coated copper foil and the like, a sealing material used for an electronic component, a molding material, a casting material, an adhesive,
- the present invention relates to a flame-retardant phosphorus-containing epoxy resin such as an electrically insulating coating material, a flame-retardant epoxy resin composition using the epoxy resin, and a cured product thereof.
- Halogen-free flame retardancy is achieved by using an organic phosphorus compound instead of flame retardation by a halogen-containing compound typified by a conventional brominated epoxy resin.
- Patent Document 1 discloses a thermosetting resin obtained by reacting 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) with epoxy resins at a predetermined molar ratio. ing.
- DOPO 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide
- Patent Document 2 discloses an organophosphorus compound having active hydrogen obtained by reacting a quinone compound with an organophosphorus compound having one active hydrogen bonded to a phosphorus atom represented by DOPO.
- a phosphorus-containing epoxy resin composition obtained by reacting with an epoxy resin containing a type epoxy resin is disclosed.
- Patent Document 3 describes an example in which a phosphorus-containing epoxy resin is used in combination with a trifunctional epoxy resin capable of obtaining a higher Tg than a conventional novolak-type epoxy resin, and the cured product has a Tg of about 180 ° C. ing.
- Patent Document 4 discloses a highly heat-resistant phosphorus-containing epoxy resin obtained by reacting a phosphorus-containing oligomer obtained by reacting a phosphorus compound with hydroxybenzaldehyde with a polyfunctional epoxy resin, and having a cured product having a Tg of 185 ° C. Some embodiments are disclosed. Numerous technologies have been disclosed as substrates having a heat resistance standard equivalent to FR-5, and these substrates are being widely used.
- Patent Document 5 discloses a composition having excellent tracking resistance while exhibiting flame retardancy and heat resistance by reacting a reactive phosphate ester with a polyfunctional epoxy resin. However, there is no particular mention of the grounds for excellent tracking resistance, and the heat resistance was also equivalent to FR-4 to FR-5 at a Tg of 155 ° C.
- Patent Document 6 discloses an epoxy resin composition excellent in heat resistance at a flame-retardant V-0 level in a halogen-free phosphorus flame-retardant system excellent in tracking resistance. However, also in this case, the heat resistance was equivalent to FR-4 to FR-5, and the Tg was insufficient for heat resistance of 200 ° C. or higher.
- Patent Document 7 discloses a halogen-free flame-retardant epoxy resin composition for prepreg having excellent heat resistance.
- This resin composition contains a polyfunctional epoxy resin having 2.8 or more functional groups therein, and aluminum hydroxide or magnesium hydroxide which is excellent in thermal decomposability is 20 parts by mass or more and 180 parts by mass with respect to the resin solid content.
- the use of less than the above provides a cured product having excellent flame retardancy, rigidity at heat, and heat resistance.
- the good flame retardancy here is an actual measurement result for an extremely thin film of 0.2 mm, and sufficient flame retardancy can be obtained even with a laminated plate having a general thickness of 0.8 to 1.6 mm. It cannot be said that it can be done. Therefore, in order to obtain sufficient flame retardancy with such a general thick plate substrate, it is necessary to increase the phosphorus content, in which case the tracking resistance is impaired.
- An object of the present invention is to provide an epoxy resin composition which exhibits excellent flame retardancy and tracking resistance while maintaining heat resistance of 200 ° C. or higher as a non-halogen epoxy resin cured product.
- a novolak-type epoxy resin which is a raw material of a phosphorus-containing epoxy resin
- the ratio of a polymer component having seven or more nuclei to a trinuclear one and the average number of functional groups associated therewith Has a high effect of improving heat resistance, flame retardancy, and tracking resistance.
- the present invention relates to an epoxy resin composition containing a phosphorus-containing epoxy resin and a curing agent and having a phosphorus content in a range of 1.0 to 1.8% by mass, wherein the phosphorus-containing epoxy resin is a gel permeation chromatograph.
- the ratio (L / H) of the content (area%, L) of trinuclear to the content (area%, H) of seven or more nuclei in the lithography (GPC) measurement is in the range of 0.6 to 4.0.
- a novolak-type epoxy resin having an average functional group number (Mn / E) obtained by dividing the number average molecular weight (Mn) by the epoxy equivalent value (E) in the range of 3.8 to 4.8;
- An epoxy resin composition characterized by being a product obtained from (1) and / or a phosphorus compound represented by the general formula (2).
- the measurement conditions of GPC are Tosoh Column Co., Ltd. (TSKgelG4000H XL, TSKgelG3000H XL, TSKgelG2000H XL) used in the under 40 ° C. those with in series, using tetrahydrofuran (THF) as an eluent 1mL
- THF tetrahydrofuran
- RI differential refractometer
- R 1 and R 2 are a hydrocarbon group having 1 to 20 carbon atoms which may have a hetero atom, and may be different or the same, May be branched or cyclic, and R 1 and R 2 may combine to form a cyclic structure site.
- n1 and n2 are each independently 0 or 1.
- A is a trivalent aromatic hydrocarbon group having 6 to 20 carbon atoms.
- the novolak epoxy resin is preferably a phenol novolak epoxy resin, and the curing agent preferably contains one or more selected from dicyandiamide, phenol resin and oxazine resin.
- the present invention is also a cured product obtained by curing the epoxy resin composition, and is a material for a prepreg, a laminated board, or a circuit board, using the epoxy resin composition.
- the present invention also relates to a method for producing a phosphorus-containing epoxy resin obtained from a novolak epoxy resin and the phosphorus compound represented by the general formula (1) and / or the general formula (2).
- the present invention is an epoxy resin composition using a phosphorus-containing epoxy resin obtained by essentially reacting a specific phosphorus compound and a novolak-type epoxy resin having a specific molecular weight distribution and a specific average functional group number,
- Tg which cannot be obtained with a conventional phosphorus-containing epoxy resin, achieves both heat resistance of 200 ° C. or higher and flame retardancy, and furthermore, tracking resistance. It became possible to provide the hardened
- the epoxy resin composition of the present invention contains a phosphorus-containing epoxy resin and a curing agent as essential components, and has a phosphorus content of 1.0 to 1.8% by mass.
- the phosphorus content of the epoxy resin composition in the present specification refers to a ratio in an organic component obtained by removing a solvent and an inorganic filler from the epoxy resin composition.
- the flame retardancy may be insufficient
- a preferred range is a phosphorus content of 1.5 to 1.8% by mass.
- the phosphorus-containing epoxy resin includes a novolak-type epoxy resin having a specific molecular weight distribution and a specific average number of functional groups, a phosphorus compound represented by the general formula (1) and / or a phosphorus compound represented by the general formula (2). Obtained by reaction with a compound.
- the molar ratio of the phosphorus compound of the general formula (1) to the phosphorus compound of the general formula (2) is preferably from 99: 1 to 75:25, more preferably from 95: 5 to 85:15.
- the phosphorus-containing epoxy resin composition is preferable in terms of handling such as viscosity which affects the impregnating property of the glass cloth.
- the raw material molar ratio for example, when the phosphorus compound of the general formula (2) is DOPO and the phosphorus compound of the general formula (1) is a reactant of DOPO and naphthoquinone (NQ), NQ / DOPO
- NQ / DOPO When (molar ratio) is 0.50, the molar ratio of the phosphorus compound of general formula (1) to the phosphorus compound of general formula (2) is equivalent to 50:50, and NQ / DOPO (molar ratio) is 0.99. Is equivalent to 99: 1.
- R 1 and R 2 each represent a hydrocarbon group having 1 to 20 carbon atoms which may have a hetero atom, and each may be different or the same. It may be chain-like, branched-chain, or cyclic. Further, R 1 and R 2 may combine to form a cyclic structure. Particularly, an aromatic ring group such as a benzene ring is preferable.
- R 1 and R 2 are aromatic ring groups
- substituents include an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, and 6 to 10 carbon atoms. May have an aryl group of 7 to 11 carbon atoms, an aryloxy group of 6 to 10 carbon atoms or an aralkyloxy group of 7 to 11 carbon atoms.
- the hetero atom include an oxygen atom and the like, which can be included between carbons constituting a hydrocarbon chain or a hydrocarbon ring.
- n1 and n2 are each independently 0 or 1.
- A is a trivalent aromatic hydrocarbon group having 6 to 20 carbon atoms.
- the aromatic hydrocarbon group includes, as a substituent, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an aryl group having 6 to 10 carbon atoms, an aryloxy group having 6 to 10 carbon atoms, It may have an aralkyl group of 7 to 12 or an aralkyloxy group of 7 to 12 carbon atoms.
- examples of the phosphorus compound represented by the above general formula (2) used as a raw material include dimethyl phosphine oxide, diethyl phosphine oxide, dibutyl phosphine oxide, diphenyl phosphine oxide, dibenzyl phosphine oxide, cyclooctylene phosphine oxide, tolyl Phosphine oxide, bis (methoxyphenyl) phosphine oxide, etc., phenyl phenylphosphinate, ethyl phenylphosphinate, tolylphosphinyl tolyl, benzyl benzylphosphinate, etc., DOPO, 8-methyl-9,10-dihydro-9-oxa -10-phosphaphenanthrene-10-oxide, 8-benzyl-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, 8-phenyl-9,10 Dihydro-9-ox
- the phosphorus compound represented by the general formula (1) used as a raw material 10- (2,5-dihydroxyphenyl) -10H-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) -HQ), 10- [2- (dihydroxynaphthyl)]-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO-NQ), diphenylphosphinylhydroquinone, diphenylphosphenyl- Examples thereof include 1,4-dioxynaphthalene, 1,4-cyclooctylenephosphinyl-1,4-phenyldiol, and 1,5-cyclooctylenephosphinyl-1,4-phenyldiol. These phosphorus compounds may be used alone or in combination of two or more, and are not limited thereto.
- the novolak type epoxy resin is generally a polyfunctional novolak type epoxy resin obtained by reacting a novolak type phenol resin, which is a condensation reaction product of phenols and aldehydes, with an epihalohydrin such as epichlorohydrin. It is represented by (3).
- phenols used include phenol, cresol, ethylphenol, butylphenol, styrenated phenol, cumylphenol, naphthol, catechol, resorcinol, naphthalene diol, bisphenol A, and aldehydes such as formalin, formaldehyde, and hydroxybenzaldehyde. , Salicylaldehyde and the like.
- an aralkyl-type phenol resin using xylylene dimethanol, xylylene dichloride, bischloromethyl naphthalene, bischloromethyl biphenyl or the like instead of aldehydes is also included in the novolak phenol resin.
- Z is an aromatic ring group selected from a benzene ring, a naphthalene ring, a biphenyl ring, and a bisphenyl structure, and these aromatic ring groups are an alkyl group having 1 to 6 carbon atoms; Having an alkoxy group having 1 to 6 carbon atoms, an aryl group having 6 to 10 carbon atoms, an aryloxy group having 6 to 10 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or an aralkyloxy group having 7 to 12 carbon atoms.
- X is a divalent aliphatic cyclic hydrocarbon group or a crosslinking group represented by the following formula (3a) or (3b).
- n is a number from 1 to 10.
- m is an integer of 1 to 3.
- R 3 , R 4 , R 5 and R 6 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 6 carbon atoms.
- B is an aromatic ring group selected from a benzene ring, a naphthalene ring and a biphenyl ring, and these aromatic ring groups are an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, It may have an aryl group of 10, an aryloxy group of 6 to 10 carbon atoms, an aralkyl group of 7 to 12 carbon atoms, or an aralkyloxy group of 7 to 12 carbon atoms.
- the divalent aliphatic cyclic hydrocarbon group preferably has 5 to 15 carbon atoms, more preferably 5 to 10 carbon atoms.
- the divalent aliphatic cyclic hydrocarbon group means an unsaturated cyclic aliphatic group such as dicyclopentadiene, tetrahydroindene, 4-vinylcyclohexene, 5-vinylnorbon-2-ene, ⁇ -pinene, ⁇ -pinene, limonene and the like.
- a divalent aliphatic cyclic hydrocarbon group derived from an aromatic hydrocarbon compound derived from an aromatic hydrocarbon compound.
- novolak-type epoxy resins include phenol novolak-type epoxy resins (for example, Epototo YDPN-638 (manufactured by Nittetsu Chemical & Materials Co., Ltd.), jER152, jER154 (all manufactured by Mitsubishi Chemical Corporation), and Epicron.
- phenol novolak-type epoxy resins for example, Epototo YDPN-638 (manufactured by Nittetsu Chemical & Materials Co., Ltd.), jER152, jER154 (all manufactured by Mitsubishi Chemical Corporation), and Epicron.
- N-740, N-770, N-775 (all manufactured by DIC Corporation) and the like, cresol novolak type epoxy resin (for example, Epototo YDCN-700 series (Nippon Steel Chemical & Materials Co., Ltd.), Epicron N-660) , N-665, N-670, N-673, N-695 (all made by DIC Corporation), EOCN-1020, EOCN-102S, EOCN-104S (all made by Nippon Kayaku Co., Ltd.), alkyl, etc.
- cresol novolak type epoxy resin for example, Epototo YDCN-700 series (Nippon Steel Chemical & Materials Co., Ltd.), Epicron N-660) , N-665, N-670, N-673, N-695 (all made by DIC Corporation), EOCN-1020, EOCN-102S, EOCN-104S (all made by Nippon Kayaku Co., Ltd.), alkyl, etc.
- Novolak type epoxy resin for example, Epotote ZX- 071T, ZX-1270, ZX-1342 (all manufactured by Nittetsu Chemical & Materials Co., Ltd.), aromatic modified phenol novolak type epoxy resin (eg, Epotote ZX-1247, GK-5855, TX-1210, YDAN- 1000 (all, manufactured by Nippon Steel Chemical & Materials Co., Ltd.), bisphenol novolak type epoxy resin, naphthol novolak type epoxy resin (eg, Epototo ZX-1142L (manufactured by Nippon Steel Chemical & Materials Co., Ltd.)), ⁇ -naphthol Aralkyl-type epoxy resins (eg, ESN-155, ESN-185V, ESN-175 (all manufactured by Nippon Steel & Materials Co., Ltd.)), naphthalene diol aralkyl-type epoxy resins (eg, ESN-35 of ESN-300 series)
- a novolak-type phenol resin obtained by reacting phenols and aldehydes in the presence of an acid catalyst is used as a starting material.
- Raw materials may be, for example, known methods obtained by production methods as described in JP-A-2002-194041, JP-A-2007-126683, and JP-A-2013-107980, and are not particularly limited. .
- the starting materials thus obtained are subjected to various techniques such as distillation to remove low molecular weight mainly of binuclear substances or to reduce the content to 10 area% or less, and then to condense with aldehydes again in the presence of an acid catalyst. By doing so, an adjustment is made to increase the ratio of seven or more nuclei while reducing two nuclei.
- the novolak-type epoxy resin is epoxidized by reflecting the molecular weight distribution of the novolak-type phenolic resin, so that the obtained novolak-type epoxy resin can also be obtained by adjusting the content of each core in the same manner.
- the “content” of each core of the novolak epoxy resin is “area%” measured by GPC, and may be expressed as content or area%.
- the content of seven or more nuclei and the content of three nuclei may be simply expressed as “H” and “L”, respectively.
- trinuclear is a case where n is 2
- heptanuclear or more is a case where n is 6 or more.
- the molar ratio of phenols to aldehydes is adjusted by adjusting the molar ratio of phenols to 1 mol of aldehydes.
- the molar ratio of phenols is large, a large amount of binuclear and then trinuclear is generated, and as the molar ratio of phenols is reduced, a large amount of high molecular weight polynuclear is generated. Conversely, binuclear and trinuclear bodies decrease.
- a carbonized layer (char) is formed by scintillation generated by contaminants on the surface of the circuit, and this conductive layer leads to dielectric breakdown.
- Char formation here is a required item that conflicts with the halogen-free flame-retardant mechanism by the organic phosphorus compound. That is, for the purpose of flame retardation, it is desired to use a large amount of a phosphorus compound to form a large amount of char, but on the other hand, it is necessary to suppress the amount of the phosphorus compound that promotes the formation of the char in order to increase tracking resistance. Therefore, in order to satisfy both, another system for promoting flame retardancy was indispensable.
- the dinuclear body of the novolak type epoxy resin is a bifunctional substance, so its involvement in the crosslinked structure in the cured product is weak. There is concern. Therefore, as one of the systems for promoting the flame retardancy, it is effective for the flame retardancy to remove the low molecular weight mainly of the binuclear body and to condense again.
- a novolak type epoxy resin in which the ratio (L / H) of the content (L / H) of the trinuclear substance to the content (H) of the heptanuclear substance or more is in the range of 0.6 to 4.0 is a phosphorus-containing epoxy resin
- the flame retardant effect can be sufficiently obtained from the resin itself even if the amount of the phosphorus compound used is reduced.
- the elastic modulus of the cured product of the phosphorus-containing epoxy resin composition in a high temperature range can be suppressed low, and the flame retardancy is further improved.
- a combustion test is performed by a decrease in the storage elastic modulus stabilized at 220 ° C. or more.
- the burning part of the piece foams and fire extinguishing is promoted.
- the value of the elastic modulus is preferably adjusted to 150 MPa or less, more preferably 50 MPa or less.
- the novolak type epoxy resin which is a raw material of the phosphorus-containing epoxy resin used in the present invention
- a method for removing or reducing binuclear substances from the novolak type phenol resin, which is a raw material thereof, by utilizing a difference in solubility of various solvents There are known methods, such as a method of dissolving in an aqueous alkali solution and removing the solution, and a method of removing by thin film distillation, and any of these separation methods may be used.
- the molecular weight distribution of the novolak-type phenol resin from which binuclear substances have been removed or reduced by the above method is adjusted again by condensation with aldehydes.
- a method of dissolving in an organic solvent such as toluene or isobutyl ketone and then performing a reaction with an aldehyde using an acid catalyst or a similar reaction in a molten state without a solvent may be used.
- Acid catalysts include inorganic acids such as hydrochloric acid, sulfuric acid and boric acid, and organic acids such as oxalic acid, acetic acid, benzenesulfonic acid, p-toluenesulfonic acid, xylenesulfonic acid, p-phenolsulfonic acid, methanesulfonic acid and ethanesulfonic acid. May be used alone or as a mixture. In addition, generally known aldehydes can be used.
- Examples include formaldehyde, paraformaldehyde, chloroacetaldehyde, dichloroacetaldehyde, bromoacetaldehyde, trioxane, acetaldehyde, glyoxal, acrolein, methacrolein, and the like.
- formaldehyde and paraformaldehyde are preferred.
- one or a mixture of two or more aldehydes may be used.
- the amount of aldehyde used in the recondensation should be 0.06 to 0.30 times the mole number obtained by dividing the charged amount of the novolak phenol resin by the actual average molecular weight of the novolak phenol resin.
- the reaction is preferably performed at a ratio of 0.08 to 0.15 times, more preferably 0.10 to 0.12 times, so that a nucleus most suitable as a novolak type epoxy resin can be adjusted.
- the “real average molecular weight” is the integrated averaged molecular weight obtained by multiplying the area% of each nucleus obtained from GPC measurement by each theoretical molecular weight.
- the ratio is less than 0.06 times, the average number of functional groups of the phosphorus-containing epoxy resin is insufficient, so that heat resistance of 200 ° C. or more cannot be obtained. On the other hand, if it is more than 0.30 times, the average number of functional groups becomes excessively high, and sufficient flame retardancy cannot be obtained due to the high elasticity of the cured product.
- Epoxidation of the novolak-type phenol resin thus obtained can be performed by a known method.
- the epihalohydrin is used at a molar ratio of 3 to 5 times the molar number of the hydroxyl group of the novolak type phenol resin, and at 60 to 70 ° C. for 2 hours under a reduced pressure of 100 to 200 torr (13.3 to 26.7 kPa).
- the reaction can be performed while dropping an aqueous solution of caustic soda.
- the novolak-type epoxy resin obtained by these methods has a ratio (L / H) of area% (L) of trinuclear to area% (H) of 7 or more nuclei in a measurement using GPC of from 0.6 to 0.6.
- the average number of functional groups (Mn / E) obtained by dividing the number average molecular weight (Mn) by the epoxy equivalent (E) is in the range of 3.8 to 4.8.
- (L / H) exceeds 4.0, the number of trinuclear compounds increases, the average number of functional groups becomes less than 3.8, and the heat resistance of the cured product using the phosphorus-containing epoxy resin decreases, and the Tg of 200 ° C. or higher is used. Can not get.
- the reaction for obtaining the phosphorus-containing epoxy resin from the phosphorus compound represented by the general formula (1) and / or the general formula (2) and the novolak-type epoxy resin is performed by a known method. For example, as described in Patent Document 2, after synthesizing the general formulas (1) and (2), a novolak-type epoxy resin or the like is added to homogenize the mixture, and then triphenylphosphine or the like is added as a catalyst. The reaction may be carried out at 150 ° C.
- a catalyst may be used to reduce the time or the reaction temperature.
- the catalyst used is not particularly limited, and those usually used for the synthesis of epoxy resins can be used.
- tertiary amines such as benzyldimethylamine
- quaternary ammonium salts such as tetramethylammonium chloride
- phosphines such as triphenylphosphine and tris (2,6-dimethoxyphenyl) phosphine
- ethyltriphenylphosphonium bromide ethyltriphenylphosphonium bromide.
- catalysts such as phosphonium salts, imidazoles such as 2-methylimidazole and 2-ethyl-4-methylimidazole can be used, and these catalysts may be used alone or in combination of two or more. Not something. Further, it may be divided and used several times.
- the amount of the catalyst here is not particularly limited, but is preferably 5% by mass or less, more preferably 1% by mass or less, based on the phosphorus-containing epoxy resin (total amount of the raw material novolak-type epoxy resin and the phosphorus compound). 5 mass% or less is more preferable. If the amount of the catalyst is large, the self-polymerization reaction of the epoxy group proceeds in some cases, and the viscosity of the resin increases, which is not preferable. When a pre-reacted epoxy resin in which the reaction is stopped halfway is used, the reaction rate can be easily adjusted to 60 to 90% by setting the amount of the catalyst to 0.1% by mass or less.
- Modifiers include bisphenol A, bisphenol F, bisphenol AD, tetrabutyl bisphenol A, hydroquinone, methylhydroquinone, dimethylhydroquinone, dibutylhydroquinone, resorcin, methylresorcin, biphenol, tetramethylbiphenol, 4,4 '-(9-fluorenylidene) Diphenol, dihydroxynaphthalene, dihydroxydiphenyl ether, dihydroxystilbene, phenol novolak resin, cresol novolak resin, bisphenol A novolak resin, dicyclopentadiene phenol resin, phenol aralkyl resin, naphthol novolak resin, terpene phenol resin, heavy oil modified phenol resin
- an inert solvent may be used for the reaction.
- various hydrocarbons such as hexane, heptane, octane, decane, dimethylbutane, pentene, cyclohexane, methylcyclohexane, benzene, toluene, xylene and ethylbenzene, and isopropyl alcohol, isobutyl alcohol, isoamyl alcohol, methoxypropanol, etc.
- ethers such as ethyl ether, isopropyl ether, butyl ether, diisoamyl ether, methyl phenyl ether, ethyl phenyl ether, amyl phenyl ether, ethyl benzyl ether, dioxane, methyl furan, tetrahydrofuran and the like, methyl cellosolve, methyl cellosolve acetate , Ethyl cellosolve, cellosolve acetate, ethylene glycol isopropyl ether, diethylene glycol Lumpur dimethyl ether, methyl ethyl carbitol, propylene glycol monomethyl ether, dimethylformamide, and the like can be used dimethyl sulfoxide, may be used by mixing 2 or more kinds is not limited thereto.
- the epoxy resin composition of the present invention can be cured by a conventionally known curing agent.
- the curing agent include those commonly used such as a phenolic resin-based curing agent, an acid anhydride-based curing agent, an amine-based curing agent, and other curing agents. Two or more types may be used.
- a dicyandiamide curing agent is preferred as the curing agent for the curable epoxy resin composition of the present invention from the viewpoint of imparting heat resistance.
- a phenol curing agent is preferable in terms of imparting water absorption and long-term thermal stability.
- the amount of the curing agent used in the epoxy resin composition is in the range of 0.2 to 1.5 mol of the active hydrogen group of the curing agent per 1 mol of the epoxy group of the entire epoxy resin.
- the amount of the active hydrogen group is less than 0.2 mol or more than 1.5 mol per 1 mol of the epoxy group, curing may be incomplete and good cured physical properties may not be obtained. It is preferably from 0.3 to 1.5 mol, more preferably from 0.5 to 1.5 mol, even more preferably from 0.8 to 1.2 mol.
- an active hydrogen group of a curing agent when dicyandiamide is used, 0.4 to 0.7 mol, preferably 0.4 to 0.6 mol, of an active hydrogen group of a curing agent is blended with respect to 1 mol of an epoxy group, and a phenolic resin curing agent is added.
- an amine-based curing agent when used, an active hydrogen group is blended in an approximately equimolar amount with respect to an epoxy group.
- an acid anhydride-based curing agent an acid anhydride group is added in an amount of 0.1 mol per 1 mol of an epoxy group. 5 to 1.2 mol, preferably 0.6 to 1.0 mol.
- the active hydrogen group referred to in the present invention is a functional group having an active hydrogen reactive with an epoxy group (including a functional group having a latent active hydrogen which generates an active hydrogen by hydrolysis or a functional group having an equivalent curing action). ), And specific examples include an acid anhydride group, a carboxyl group, an amino group, and a phenolic hydroxyl group. With respect to active hydrogen groups, one mole of a carboxyl group or a phenolic hydroxyl group is calculated as one mole, and two moles of an amino group (NH 2 ) are calculated. When the active hydrogen group is not clear, the active hydrogen equivalent can be determined by measurement.
- the active hydrogen equivalent of the used curing agent is measured. Can be requested.
- a monoepoxy resin such as phenylglycidyl ether
- a curing agent having an unknown active hydrogen equivalent for example, by reacting a monoepoxy resin such as phenylglycidyl ether with a known epoxy equivalent with a curing agent having an unknown active hydrogen equivalent, and measuring the amount of consumed monoepoxy resin, the active hydrogen equivalent of the used curing agent is measured. Can be requested.
- phenolic curing agent examples include bisphenol A, bisphenol F, bisphenol C, bisphenol K, bisphenol Z, bisphenol S, tetramethylbisphenol A, tetramethylbisphenol F, tetramethylbisphenol S, tetramethylbisphenol Z, Bisphenols such as dihydroxydiphenyl sulfide, bisphenol TMC, 4,4 ′-(9-fluorenylidene) diphenol, 4,4′-thiobis (3-methyl-6-t-butylphenol), catechol, resorcinol, methylresorcinol, Dihydroquinone such as hydroquinone, monomethylhydroquinone, dimethylhydroquinone, trimethylhydroquinone, mono-t-butylhydroquinone and di-t-butylhydroquinone Benzenes, hydroxynaphthalenes such as dihydroxynaphthalene, dihydroxymethylnaphthalene, dihydroxymethylnaphthalene and trihydroxy
- Examples include compounds containing a triazine ring and a hydroxyphenyl group. From the viewpoint of availability, phenol novolak resins, dicyclopentadiene-type phenol resins, trishydroxyphenylmethane-type novolak resins, aromatic-modified phenol novolak resins, and the like are preferable.
- phenols include phenol, cresol, xylenol, butylphenol, amylphenol, nonylphenol, butylmethylphenol, trimethylphenol, phenylphenol, etc.
- naphthols include 1-naphthol, 2-naphthol; and the above-mentioned biphenols and bisphenols.
- Aldehydes include formaldehyde, acetaldehyde, propylaldehyde, butyraldehyde, valeraldehyde, caproaldehyde, benzaldehyde, chloraldehyde, bromaldehyde, glyoxal, malonaldehyde, succinaldehyde, glutaraldehyde, adipaldehyde, pimeraldehyde, sebacaldehyde , Acrolein, crotonaldehyde, salicylaldehyde, phthalaldehyde, hydroxybenzaldehyde and the like.
- biphenyl-based condensing agent examples include bis (methylol) biphenyl, bis (methoxymethyl) biphenyl, bis (ethoxymethyl) biphenyl, bis (chloromethyl) biphenyl, and the like.
- dianhydride curing agent examples include methyltetrahydrophthalic anhydride, hexahydrophthalic anhydride, pyromellitic anhydride, phthalic anhydride, trimellitic anhydride, methylnadic acid, and the like.
- amine-based curing agent examples include diethylenetriamine, triethylenetetramine, metaxylenediamine, isophoronediamine, diaminodiphenylmethane, diaminodiphenylsulfone, diaminodiphenylether, benzyldimethylamine, 2,4,6-tris (dimethylaminomethyl A) amine compounds such as phenol, dicyandiamide, and polyamideamine which is a condensate of an acid such as dimer acid and a polyamine.
- curing agents include phosphine compounds such as triphenylphosphine, phosphonium salts such as tetraphenylphosphonium bromide, 2-methylimidazole, 2-phenylimidazole, 2-ethyl-4-methylimidazole, Imidazoles such as undecylimidazole and 1-cyanoethyl-2-methylimidazole, imidazole salts which are salts of imidazoles with trimellitic acid, isocyanuric acid or boric acid, benzyldimethylamine, 2,4,6-tris Amines such as (dimethylaminomethyl) phenol; quaternary ammonium salts such as trimethylammonium chloride; diazabicyclo compounds; salts of diazabicyclo compounds with phenols and phenol novolak resins; Complex compounds such as boron and amine or ether compound, and an aromatic phosphonium or iodonium salts, hydrazides or the
- an oxazine resin that generates a phenolic hydroxyl group upon curing can be used as a curing agent.
- the oxazine resin include bisphenol F-type benzoxazine compounds (for example, YBZ-2013 (manufactured by Nittetsu Chemical & Materials Co., Ltd.), Fa-type (manufactured by Shikoku Chemicals Co., Ltd.), and BF-BXZ ( Konishi Chemical Co., Ltd.), LMB 6493 (Huntsman), bisphenol A type benzoxazine compound (eg, XU3560CH (Huntsman)), bisphenol S type benzoxazine compound (eg, BS-BXZ (Konishi Chemical) Phenol phthalein type benzoxazine compound (eg, LMB6490 (manufactured by Huntsman)), phenol novolak type benzoxazine compound (eg, YBZ
- the epoxy resin composition of the present invention may optionally use an epoxy resin other than the above-mentioned phosphorus-containing epoxy resin.
- the epoxy resin that can be used in combination include, for example, polyglycidyl ether compounds, polyglycidylamine compounds, polyglycidyl ester compounds, alicyclic epoxy compounds, and other modified epoxy resins, but are not limited thereto. May be used alone or in combination of two or more.
- the content is preferably 50% by mass or less, more preferably 30% by mass or less of the total epoxy resin. If too much epoxy resin is used, there is a possibility that the effect of achieving both heat resistance and flame retardancy cannot be obtained.
- epoxy resins that can be used in combination include bisphenol A type epoxy resin, bisphenol F type epoxy resin, tetramethyl bisphenol F type epoxy resin, hydroquinone type epoxy resin, biphenyl type epoxy resin, bisphenol fluorene type epoxy resin, and bisphenol S.
- the epoxy resin composition of the present invention can use a known reaction retarder to adjust curability.
- a known reaction retarder for example, boric acid, borate esters, phosphoric acid, alkyl phosphate esters, p-toluenesulfonic acid and the like can be used.
- borate ester include tributyl borate, trimethoxyboroxine, ethyl borate, an epoxy-phenol-borate ester blend (eg, Cureduct L-07N (manufactured by Shikoku Chemical Industry Co., Ltd.)) and the like.
- the alkyl phosphate include trimethyl phosphate and tributyl phosphate.
- the reaction retarder may be used alone or in combination of two or more.
- the reaction retarder is used alone because it is easy to adjust the amount of use, and the effect is best when a small amount of boric acid is used.
- it can be dissolved in an alcoholic solvent such as methanol, butanol or 2-propanol and used at a concentration of 5 to 20% by mass.
- boric acid is preferably used in an amount of 0.1 to 0.5 mol, more preferably 0.15 to 0.35 mol, per mol of the curing agent, for obtaining a retarding effect and heat resistance. .
- the amount is preferably 0.1 to 5 parts by mass, more preferably 0.1 to 1 part by mass, based on the phosphorus-containing epoxy resin, for obtaining heat resistance.
- the amount of boric acid is increased to 5 parts by mass or more, it is necessary to increase the amount of a reaction accelerator such as imidazole in adjusting the curability, which is not preferable because the insulation reliability of the cured product is significantly impaired. .
- the epoxy resin composition may optionally use a curing accelerator.
- a curing accelerator for example, imidazoles such as 2-methylimidazole, 2-ethylimidazole, 2-ethyl-4-methylimidazole, 2- (dimethylaminomethyl) phenol, 1,8-diaza-bicyclo (5,4,0) undecene Tertiary amines such as -7; phosphines such as triphenylphosphine, tricyclohexylphosphine and triphenylphosphine triphenylborane; and metal compounds such as tin octylate.
- the curing accelerator is used as needed in an amount of 0.02 to 5.0 parts by mass with respect to 100 parts by mass of the epoxy resin in the epoxy resin composition. By using a curing accelerator, the curing temperature can be lowered and the curing time can be shortened.
- the epoxy resin composition may also use an organic solvent or a reactive diluent for adjusting viscosity.
- organic solvent examples include amides such as N, N-dimethylformamide and N, N-dimethylacetamide, and ethers such as ethylene glycol monomethyl ether, dimethoxydiethylene glycol, ethylene glycol diethyl ether, diethylene glycol diethyl ether, and triethylene glycol dimethyl ether.
- amides such as N, N-dimethylformamide and N, N-dimethylacetamide
- ethers such as ethylene glycol monomethyl ether, dimethoxydiethylene glycol, ethylene glycol diethyl ether, diethylene glycol diethyl ether, and triethylene glycol dimethyl ether.
- ketones such as acetone, methyl ethyl ketone methyl isobutyl ketone and cyclohexanone, methanol, ethanol, 1-methoxy-2-propanol, 2-ethyl-1-hexanol, benzyl alcohol, ethylene glycol, propylene glycol, butyl diglycol, Alcohols such as pine oil, butyl acetate, methoxybutyl acetate, methyl cellosolve acetate, cellosolve Acetates such as tate, ethyl diglycol acetate, propylene glycol monomethyl ether acetate, carbitol acetate, and benzyl alcohol acetate; benzoic esters such as methyl benzoate and ethyl benzoate; and methyl cellosolve, cellosolve, and butyl cellosolve Examples include cellosolves, carbitols such as methyl carbitol, carbitol, and buty
- Examples of the reactive diluent include monofunctional glycidyl ethers such as allyl glycidyl ether, butyl glycidyl ether, 2-ethylhexyl glycidyl ether, phenyl glycidyl ether, and tolyl glycidyl ether, and resorcinol diglycidyl ether and neopentyl glycol diglycidyl ether.
- monofunctional glycidyl ethers such as allyl glycidyl ether, butyl glycidyl ether, 2-ethylhexyl glycidyl ether, phenyl glycidyl ether, and tolyl glycidyl ether
- resorcinol diglycidyl ether and neopentyl glycol diglycidyl ether such as allyl glycidyl ether, butyl
- Glycidyl ethers such as 1,4-butanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, cyclohexanedimethanol diglycidyl ether, propylene glycol diglycidyl ether, glycerol polyglycidyl ether, and trimethylolpropane Polyglycidyl ether, trimethylolethane polyglycidyl ether, pentaerythritol polyglycidyl ether Polyfunctional glycidyl ethers and the like ether, or glycidyl esters such as neodecanoic acid glycidyl ester, phenyl diglycidyl amine, although glycidyl amines such as tolyl diglycidyl amines, but not limited thereto.
- organic solvents or reactive diluents are preferably used alone or as a mixture of two or more kinds at a non-volatile content of 90% by mass or less, and the appropriate kind and amount used are appropriately selected depending on the application.
- a polar solvent having a boiling point of 160 ° C. or lower such as methyl ethyl ketone, acetone, and 1-methoxy-2-propanol.
- the epoxy resin composition may use an inorganic filler as needed. Specifically, fused silica, crystalline silica, alumina, silicon nitride, aluminum hydroxide, magnesium hydroxide, talc, calcined talc, mica, clay, kaolin, boehmite, calcium carbonate, calcium silicate, calcium hydroxide, magnesium carbonate, Inorganic fillers such as barium carbonate, barium sulfate, titanium oxide, boron nitride, carbon, glass powder, and silica balloon may be mentioned, but pigments and the like may be blended.
- inorganic fillers such as barium carbonate, barium sulfate, titanium oxide, boron nitride, carbon, glass powder, and silica balloon may be mentioned, but pigments and the like may be blended.
- the purpose of using the inorganic filler is generally to improve impact resistance, but it also contributes to dimensional stability as a measure against warpage of the substrate due to thermal expansion.
- metal hydroxides such as aluminum hydroxide, boehmite, and magnesium hydroxide may be used for the purpose of supplementing the anti-tracking property in addition to acting as a flame retardant aid.
- the phosphorus content of the composition is reduced, it is effective in securing flame retardancy, but the use of a large amount greatly reduces the moldability of the substrate.
- the compounding amount is not more than 10% by mass, the effect of impact resistance is small, but if the compounding amount exceeds 150% by mass, on the other hand, the adhesiveness required for laminated board use is reduced, and other forming properties such as drill workability are required. Processing characteristics may be reduced.
- fibrous fillers such as glass fiber, carbon fiber, alumina fiber, silica-alumina fiber, silicon carbide fiber, polyester fiber, cellulose fiber, and aramid fiber, and organic fillers such as fine particle rubber and thermoplastic elastomer are also required. They can be used together to such an extent that the characteristics of the present invention are not impaired.
- the epoxy resin composition may contain another thermosetting resin or a thermoplastic resin as long as the properties are not impaired.
- phenolic resin acrylic resin, petroleum resin, indene resin, coumarone indene resin, phenoxy resin, polyurethane resin, polyester resin, polyamide resin, polyimide resin, polyamideimide resin, polyetherimide resin, polyphenylene ether resin, modified polyphenylene ether
- examples include, but are not limited to, resins, polyether sulfone resins, polysulfone resins, polyether ether ketone resins, polyphenylene sulfide resins, polyvinyl formal resins, and the like.
- the epoxy resin composition may be used in combination with various known flame retardants for the purpose of improving the flame retardancy of the obtained cured product.
- flame retardant examples include a phosphorus-based flame retardant, a nitrogen-based flame retardant, a silicone-based flame retardant, an inorganic flame retardant, and an organic metal salt-based flame retardant, and a phosphorus-based flame retardant is particularly preferred. These flame retardants may be used alone or in combination of two or more.
- the phosphorus-based flame retardant either an inorganic phosphorus-based compound or an organic phosphorus-based compound can be used.
- the inorganic phosphorus-based compound include inorganic phosphorus-containing phosphorus compounds such as red phosphorus, ammonium phosphate such as monoammonium phosphate, diammonium phosphate, triammonium phosphate, and ammonium polyphosphate, and phosphate amide.
- the organic phosphorus compound examples include aliphatic phosphate esters, phosphate ester compounds, for example, condensed phosphate esters such as PX-200 (manufactured by Daihachi Chemical Industry Co., Ltd.), phosphonic acid compounds, phosphinic acid compounds, General-purpose organic phosphorus compounds such as organic nitrogen-containing phosphorus compounds such as phosphine oxide compounds, phosphorane compounds, and phosphazenes; metal salts of phosphinic acid; and cyclic organic phosphorus compounds such as DOPO, DOPO-HQ, and DOPO-NQ; Examples thereof include a phosphorus-containing epoxy resin and a phosphorus-containing curing agent, which are derivatives obtained by reacting them with a compound such as an epoxy resin or a phenol resin. When a phosphorus-based flame retardant is used, a flame retardant auxiliary such as magnesium hydroxide may be used in combination.
- a flame retardant auxiliary such as magnesium hydroxide may be
- a cured product can be obtained by curing the epoxy resin composition of the present invention.
- a laminated sheet can be obtained by forming a resin sheet, a copper foil with a resin, a prepreg, etc., laminating and heating and curing.
- a fibrous filler is preferred as a filler in terms of dimensional stability, bending strength and the like. More preferably, a glass fiber substrate in which glass fibers are woven in a mesh shape is used.
- the epoxy resin composition may further contain various additives such as a silane coupling agent, an antioxidant, a release agent, an antifoaming agent, an emulsifier, a thixotropic agent, and a leveling agent, if necessary. These additives are preferably in the range of 0.01 to 20% by mass based on the epoxy resin composition.
- a prepreg used for a printed wiring board or the like By impregnating the fibrous base material with the epoxy resin composition, a prepreg used for a printed wiring board or the like can be prepared.
- the fibrous base material woven or non-woven fabrics of inorganic fibers such as glass and organic fibers such as polyester resin, polyamine resin, polyacryl resin, polyimide resin, and aromatic polyamide resin can be used. Not something.
- the method for producing the prepreg from the epoxy resin composition is not particularly limited.For example, the epoxy resin composition is immersed and impregnated in a resin varnish prepared by adjusting the viscosity with a solvent, and then dried by heating. It is obtained by semi-curing (B-stage) the components, and for example, can be dried by heating at 100 to 200 ° C. for 1 to 40 minutes.
- the amount of the resin in the prepreg is preferably 30 to 80% by mass.
- a method of curing a laminate generally used when manufacturing a printed wiring board can be used, but the method is not limited thereto.
- a metal foil is arranged on one or both sides to form a laminate, and the laminate is heated and pressed to laminate. Integrate.
- the metal foil a single, alloy, or composite metal foil of copper, aluminum, brass, nickel, or the like can be used. Then, the prepreg is cured by heating and pressurizing the produced laminate, and a laminate can be obtained.
- the heating temperature is 160 to 220 ° C.
- the pressure is 50 to 500 N / cm 2
- the heating and pressing time is 40 to 240 minutes, so that the desired cured product can be obtained. If the heating temperature is low, the curing reaction does not proceed sufficiently, and if the heating temperature is high, decomposition of the epoxy resin composition may start. In addition, if the pressure is low, bubbles may remain inside the obtained laminate and the electrical characteristics may decrease. If the pressure is high, the resin flows before curing, and a cured product having a desired thickness is obtained. May not be possible. Further, if the heating and pressurizing time is short, the curing reaction may not proceed sufficiently, and if it is long, the epoxy resin composition in the prepreg may be thermally decomposed, which is not preferable.
- the epoxy resin composition can be cured by the same method as a known epoxy resin composition to obtain a cured epoxy resin.
- a method for obtaining a cured product a method similar to a known epoxy resin composition can be used, and casting, injection, potting, dipping, drip coating, transfer molding, compression molding, and the like, and a resin sheet, A method of forming a laminate by laminating in the form of a copper foil with resin, a prepreg or the like, and curing by heating and pressurizing is suitably used.
- the curing temperature at that time is usually in the range of 100 to 300 ° C., and the curing time is usually about 1 to 5 hours.
- a specific phosphorus compound reacts with a novolak type epoxy resin having a specific molecular weight distribution and a specific average number of functional groups.
- the phosphorus-containing epoxy resin obtained by the above shows higher heat resistance and flame retardancy as compared with the conventionally known phosphorus-containing epoxy resin, furthermore it is possible to improve the tracking resistance, and the physical properties of the cured product are improved.
- An epoxy resin composition that can be improved can be provided.
- ⁇ Epoxy equivalent The measurement was carried out in accordance with JIS K7236. Specifically, using an automatic potentiometric titrator (COM-1600ST, manufactured by Hiranuma Sangyo Co., Ltd.), using chloroform as a solvent, adding a brominated tetraethylammonium acetic acid solution, and adding 0.1 mol / L perchloric acid-acetic acid The solution was titrated.
- COM-1600ST automatic potentiometric titrator
- Phosphorus content 3 mL of sulfuric acid is added to 150 mg of a sample, and heated for 30 minutes. After returning to room temperature, 3.5 mL of nitric acid and 0.5 mL of perchloric acid were added, and the mixture was thermally decomposed until the contents became clear or yellow. This solution was diluted with water in a 100 mL volumetric flask. 10 mL of this sample solution was placed in a 50 mL volumetric flask, 1 drop of a phenolphthalein indicator was added, 2 mol / L aqueous ammonia was added until the color became slightly red, 2 mL of a 50% sulfuric acid solution was further added, and water was added.
- Tg Glass transition temperature
- the main body manufactured by Tosoh Corporation, HLC-8220GPC
- column temperature was 40 ° C.
- THF was used as an eluent at a flow rate of 1 mL / min
- an RI (differential refractometer) detector was used as a detector.
- a measurement sample 50 g of a sample obtained by dissolving 0.05 g of a sample in 10 mL of THF and filtering through a microfilter was used.
- GPC-8020 model II version 6.00 manufactured by Tosoh Corporation was used.
- Mn is standard monodisperse polystyrene (manufactured by Tosoh Corporation, A-500, A-1000, A-2500, A-5000, F-1, F- 2, F-4, F-10, F-20, F-40).
- ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ Tracking resistance Measured according to JIS C # 2134. Specifically, a tracking resistance tester (HAT-112-3, manufactured by Yamayo Test Instruments Co., Ltd.) was used. A measurement sample (a laminated plate having a thickness of 1.6 mm) was cut into a size of 20 mm ⁇ 20 mm, and adjusted before testing at 23 ⁇ 2 ° C. and 50 ⁇ 5% humidity for 48 hours, and then at 23 ⁇ 2 ° C. and 50% humidity. Under the test environment of ⁇ 5%, the test is performed by stacking two samples so that the sample thickness is 3 mm or more. Confirmation of 100 drops of 0.1% ammonium chloride aqueous solution was performed on five test pieces, and the maximum voltage value that all of the test pieces passed was used as the test result.
- Synthesis Example 1 1000 parts of phenol was added to a four-necked glass separable flask equipped with a stirrer, a temperature controller, a reflux condenser, a full contractor, a decompressor, and the like. Oxalic acid dihydrate was added and dissolved by stirring, and 142 parts of 37.5% formalin was added dropwise over 30 minutes. Thereafter, the reaction was performed for 3 hours while maintaining the reaction temperature at 92 ° C. After completion of the reaction, the temperature was raised to 110 ° C. and dehydration was performed. Then, about 90% of the remaining phenol was recovered under the conditions of 150 ° C. and 60 mmHg, and then recovered under the conditions of 5 mmHg.
- N1 phenol novolak resin
- the obtained N1 has a softening point of 65 ° C., 10.8 area% of binuclear body, 52.9 area% of trinuclear body, 21.8 area% of tetranuclear body, 8.5 area% of pentanuclear body, and hexanuclear body. 6.0 area%, the actual average molecular weight was 355.
- Synthesis Example 2 Using the N0 obtained in Synthesis Example 1, a part of the binuclear body was further distilled off using a thin-film evaporator at 300 ° C. and 5 mmHg to obtain a phenol novolak resin (N2).
- the obtained N2 has a softening point of 66 ° C., 5.9 area% of binuclear, 58.4 area% of trinuclear, 22.9 area% of tetranuclear, 8.3 area% of pentanuclear, and hexanuclear. 4.6 area%, the actual average molecular weight was 356.
- Synthesis Example 3 1000 parts of N1 obtained in Synthesis Example 1 was placed in a four-necked glass separable flask equipped with a stirrer, a temperature controller, a reflux condenser, a total condenser, a nitrogen gas introducing device, a pressure reducing device, and a dropping device. Then, 0.38 part of oxalic acid dihydrate was charged, the mixture was stirred while introducing nitrogen gas, and the temperature was raised by heating. Dropping of 13.5 parts of 37.5% formalin was started at 80 ° C., and the dropping was completed in 30 minutes. Thereafter, the reaction was carried out for 3 hours while maintaining the reaction temperature at 92 ° C., and then the temperature was raised to 110 ° C.
- N3 phenol novolak resin
- the obtained N3 had a softening point of 63 ° C., 9.4 area% of binuclear bodies, 48.1 area% of trinuclear bodies, 9.0 area% or more of 7 nuclei, and Mn552.
- FIG. 1 shows a GPC measurement chart of E1.
- the horizontal axis shows the elution time (minutes), and the vertical axis shows the detection intensity (mV).
- the peak indicated by A is a trinuclear body, and the peak group indicated by B is a nucleus of seven or more nuclei.
- Synthesis Example 4 A phenol novolak resin (N4) was obtained in the same manner as in Synthesis Example 3 except that 1,000 parts of N1, 0.63 parts of oxalic acid dihydrate, and 22.5 parts of 37.5% formalin were charged. The obtained N4 had a softening point of 69 ° C., and was 8.0 area% of binuclear bodies, 43.7 area% of trinuclear bodies, 14.2 area% of 7 or more nuclei, and Mn574. Thereafter, N4 was epoxidized in the same manner as in Synthesis Example 3, to obtain a phenol novolak type epoxy resin (E2).
- E2 phenol novolak type epoxy resin
- Synthesis Example 5 A phenol novolak resin (N5) was obtained in the same manner as in Synthesis Example 3 except that 1,000 parts of N1, 8.9 parts of oxalic acid dihydrate and 67.6 parts of 37.5% formalin were charged. The obtained N5 had a softening point of 78 ° C., a binuclear body of 7.2 area%, a trinuclear body of 31.2 area%, a hepatic body of 30.9 or more, and an Mn of 690. Thereafter, N5 was epoxidized in the same manner as in Synthesis Example 3 to obtain a phenol novolak type epoxy resin (E3).
- E3 phenol novolak type epoxy resin
- Synthesis Example 6 A phenol novolak resin (N6) was obtained in the same manner as in Synthesis Example 3 except that 1,000 parts of N2, 0.63 part of oxalic acid dihydrate, and 22.5 parts of 37.5% formalin were charged. The obtained N6 had a softening point of 70 ° C., 5.1 area% of binuclear bodies, 45.8 area% of trinuclear bodies, 14.4 area% or more of 7 nuclei, and Mn 589. Thereafter, N6 was epoxidized in the same manner as in Synthesis Example 3 to obtain a phenol novolak type epoxy resin (E4).
- E4 phenol novolak type epoxy resin
- Synthesis Example 7 LV-70S (Phenol novolak resin manufactured by Gunei Chemical Co., Ltd., softening point 65 ° C., 1.0 area% of dinuclear bodies, 74.7 area% of trinuclear bodies, 18.1 area% of tetranuclear bodies, pentanuclear bodies 6.2 area%, actual number average molecular weight 337) of 1000 parts, oxalic acid dihydrate of 0.66 parts, and 37.5% formalin of 23.7 parts were prepared in the same manner as in Synthesis Example 3 except that they were charged. A phenol novolak resin (N7) was obtained.
- N7 had a softening point of 67 ° C., 1.1 area% of binuclear bodies, 57.3 area% of trinuclear bodies, and it was difficult to separate hexanuclear bodies and hepatic bodies. It was 22.0 area% and Mn580. Thereafter, N7 was epoxidized in the same manner as in Synthesis Example 3 to obtain a phenol novolak type epoxy resin (E5).
- Synthesis Example 8 A phenol novolak resin (N8) was obtained in the same manner as in Synthesis Example 3 except that 1,000 parts of N1, 0.32 parts of oxalic acid dihydrate, and 11.3 parts of 37.5% formalin were charged. The obtained N8 had a softening point of 62 ° C., 9.6 area% of binuclear bodies, 48.4 area% of trinuclear bodies, 7.7 area% or more of 7 nuclei, and Mn 545. Thereafter, epoxidation of N8 was performed in the same manner as in Synthesis Example 3 to obtain a phenol novolak type epoxy resin (E6).
- E6 phenol novolak type epoxy resin
- Synthesis Example 9 A phenol novolak resin (N9) was obtained in the same manner as in Synthesis Example 3 except that 1,000 parts of N1, 2.52 parts of oxalic acid dihydrate, and 90.1 parts of 37.4% formalin were charged. The obtained N9 had a softening point of 84 ° C., 5.7 area% of binuclear bodies, 24.1 area% of trinuclear bodies, 41.5 area% of 7 or more nuclei, and Mn 748. Thereafter, N9 was epoxidized in the same manner as in Synthesis Example 3 to obtain a phenol novolak type epoxy resin (E7).
- E7 phenol novolak type epoxy resin
- E1 Phenol novolak type epoxy resin obtained in Synthesis Example 3 (epoxy equivalent: 171; Mn 650; trinuclear 40.6 area%; heptanuclear or more 20.9 area%)
- E2 Phenol novolak type epoxy resin obtained in Synthesis Example 4 (epoxy equivalent: 172, Mn682, trinuclear 36.4 area%, heptanuclear or more 26.7 area%)
- E3 Phenol novolak type epoxy resin obtained in Synthesis Example 5 (epoxy equivalent: 173, Mn824, 3 cores: 26.1 area%, 7 cores or more: 42.2 area%)
- E4 Phenol novolak type epoxy resin obtained in Synthesis Example 6 (epoxy equivalent: 174, Mn693, 3 nuclei 38.8 area%, 7 nuclei or more 26.0 area%)
- E5 Phenol novolak type epoxy resin obtained in Synthesis Example 7 (epoxy equivalent: 173, Mn669, trinucle
- B1 Dicyandiamide (manufactured by Nippon Carbide Co., Ltd., dicyandiamide, active hydrogen equivalent: 21)
- B2 Compound containing triazine ring and hydroxyphenyl group (PS-6313, active hydrogen equivalent 148, manufactured by Gunei Chemical Industry Co., Ltd.)
- B3 Aralkyl-type polyhydric phenol resin (NX-1723, active hydrogen equivalent 152, manufactured by Nippon Steel Chemical & Materials Co., Ltd.)
- B4 Trisphenylmethane-type polyhydric phenol resin (MEH-7500H, manufactured by Meiwa Kasei Kogyo Co., Ltd., active hydrogen equivalent: 100)
- B5 Phenol novolak resin (Restop PSM-6358, manufactured by Gun Ei Chemical Co., Ltd., softening point 118 ° C, active hydrogen equivalent 106)
- B6 Benzoxazine resin (YBZ-2213, manufactured by Nittet
- C1 2-ethyl-4-methylimidazole (curing accelerator, manufactured by Shikoku Chemicals Co., Ltd., Cureazole 2E4MZ)
- FR1 cyclophosphazene (non-halogen flame retardant, Rabitol FP-100, manufactured by Fushimi Pharmaceutical Co., Ltd., phosphorus content 13%)
- FR2 magnesium hydroxide (non-halogen flame retardant, filler, manufactured by Kyowa Chemical Industry Co., Ltd., Kisuma 5, average particle size: about 0.8 to 1.0 ⁇ m)
- Example 1 100 parts of HCA (manufactured by Sanko Co., DOPO) and 185 parts of toluene were charged into a four-necked glass separable flask equipped with a stirrer, a temperature controller, a reflux condenser, a total condenser, and a nitrogen gas introducing device. At 80 ° C. Thereafter, 62.2 parts of 1,4-naphthoquinone (NQ) was dividedly charged while paying attention to temperature rise due to heat of reaction. At this time, the molar ratio of NQ to DOPO (NQ / DOPO) was 0.85. After this reaction, 627 parts of the epoxy resin E1 were charged, stirred while introducing nitrogen gas, and heated to 130 ° C.
- DOPO 1,4-naphthoquinone
- Examples 2 to 8 It was blended in the blending amounts (parts) shown in Table 1 and the same operation as in Example 1 was performed to obtain a phosphorus-containing epoxy resin.
- Table 1 shows the physical property values of the phosphorus-containing epoxy resin.
- reaction rate represents the consumption rate of the raw material phosphorus compound calculated from the measured epoxy equivalent
- L / H is the content (area%, The ratio of the content (area%, L) of the trinuclear to H) is shown
- Mn / E represents the average number of functional groups.
- Example 9 100 parts of the phosphorus-containing epoxy resin (PE1), 3.7 parts of the curing agent (B1), and 0.5 part of a 10% methanol solution of boric acid were blended.
- the epoxy resin is charged in the form of a varnish dissolved in methyl ethyl ketone, and the curing agent is dissolved in a mixed solvent of methoxypropanol and N, N-dimethylformamide and compounded. It was adjusted to be. Thereafter, the varnish was adjusted using a methoxypropanol solution of a curing accelerator (2E4MZ) so that the gel time of the varnish was 150 to 350 seconds at 171 ° C. to obtain a phosphorus-containing epoxy resin composition varnish. .
- a methoxypropanol solution of a curing accelerator (2E4MZ) so that the gel time of the varnish was 150 to 350 seconds at 171 ° C.
- Examples 10 to 16 It was blended in the blending amounts (parts) shown in Table 3 and the same operation as in Example 9 was performed to obtain a laminate. The same test as in Example 9 was performed, and the results are shown in Table 3.
- Comparative Examples 1 to 6 It was blended in the blending amounts (parts) shown in Table 4 and the same operation as in Example 9 was performed to obtain a laminate. The same test as in Example 9 was performed, and the results are shown in Table 4.
- Examples 17 to 28 and Comparative Examples 7 to 9 After blending with the blending amount (parts) in Table 5 and performing the same operation as in Example 9 to obtain a phosphorus-containing epoxy resin composition varnish, FR1 or FR2 was subjected to 5000 rpm shear stirring using a homodisper. Then, the mixture was dividedly charged and uniformly dispersed for about 10 minutes. The same operation as in Example 9 was performed except that the curing temperature condition was changed to 210 ° C. ⁇ 80 minutes to obtain a laminated plate test piece. The same test as in Example 9 was performed, and the results are shown in Table 5.
- the example using the phosphorus-containing epoxy resin of the present invention has higher Tg of 200 ° C. or higher, The flame retardancy was also superior in tracking resistance while maintaining V-0, and in the comparative example, Tg, flame retardancy, tracking resistance, and adhesion were deteriorated.
- the present invention has made it possible to provide a cured product that achieves both heat resistance of 200 ° C. or higher and flame retardancy, which cannot be obtained with a conventional phosphorus-containing epoxy resin, and has good tracking resistance. Therefore, the epoxy resin composition of the present invention can be used as an electronic circuit board material such as a copper-clad laminate, a film material, a copper foil with a resin, and an electronic material such as a sealing material, a molding material, a casting material, an adhesive, and an electrically insulating coating material. It can be widely used as a component material.
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Abstract
Description
本発明のエポキシ樹脂組成物は、リン含有エポキシ樹脂及および硬化剤を必須成分とし、リン含有率が1.0~1.8質量%の範囲である。本明細書におけるエポキシ樹脂組成物としてのリン含有率とは、エポキシ樹脂組成物から溶剤と無機充填剤を除いた有機成分中における比率を指す。リン含有率が1.0質量%未満の場合、難燃性が不十分となる恐れがあり、リン含有率が1.8質量%を超えるとTg=200℃以上の耐熱性を確保できない恐れがある。好ましい範囲はリン含有率が1.5~1.8質量%である。
なお、原料モル比に換算すると、例えば、一般式(2)のリン化合物がDOPOであり、一般式(1)のリン化合物がDOPOとナフトキノン(NQ)との反応物である場合、NQ/DOPO(モル比)0.50であるとき、一般式(1)のリン化合物と一般式(2)のリン化合物のモル比は、50:50に相当し、NQ/DOPO(モル比)0.99であるとき、99:1に相当する。
一般式(1)または一般式(2)において、R1およびR2はヘテロ原子を有してもよい炭素数1~20の炭化水素基を示し、それぞれは異なっていても同一でも良く、直鎖状、分岐鎖状、環状であってもよい。また、R1とR2が結合して環状構造を形成してもよい。特に、ベンゼン環等の芳香族環基が好ましい。R1およびR2が芳香族環基の場合、置換基として、炭素数1~8のアルキル基、炭素数1~8のアルコキシ基、炭素数5~8のシクロアルキル基、炭素数6~10のアリール基、炭素数7~11のアラルキル基、炭素数6~10のアリールオキシ基または炭素数7~11のアラルキルオキシ基を有してもよい。ヘテロ原子としては、酸素原子等が例示され、これは炭化水素鎖または炭化水素環を構成する炭素間に含まれることができる。
n1およびn2はそれぞれ独立に、0または1である。
Aは3価の炭素数6~20の芳香族炭化水素基である。好ましくはベンゼン環基やナフタレン環基である。芳香族炭化水素基は、置換基として、炭素数1~6のアルキル基、炭素数1~6のアルコキシ基、炭素数6~10のアリール基、炭素数6~10のアリールオキシ基、炭素数7~12のアラルキル基、または炭素数7~12のアラルキルオキシ基を有してもよい。
使用されるフェノール類としてはフェノール、クレゾール、エチルフェノール、ブチルフェノール、スチレン化フェノール、クミルフェノール、ナフトール、カテコール、レゾルシノール、ナフタレンジオール、ビスフェノールAなどが挙げられ、アルデヒド類としてはホルマリン、ホルムアルデヒド、ヒドロキシベンズアルデヒド、サリチルアルデヒドなどが挙げられる。また、アルデヒド類の代わりにキシリレンジメタノール、キシリレンジクロライド、ビスクロロメチルナフタレン、ビスクロロメチルビフェニルなどを使用したアラルキル型フェノール樹脂も本発明ではノボラック型フェノール樹脂に含む。
これら得られた出発原料は、蒸留等の各種手法によって2核体を中心とする低分子量を除去または含有率を10面積%以下まで低減した後、さらに酸触媒存在下で再度アルデヒド類と縮合を行うことによって2核体を減らしながら、かつ7核体以上の比率を増やす調整を行う。ノボラック型エポキシ樹脂はこのノボラック型フェノール樹脂の分子量分布を反映してエポキシ化されるため、得られたノボラック型エポキシ樹脂においても各核体の含有率は同様に調整されたものが得られる。
なお、本明細書において、ノボラック型エポキシ樹脂の各核体の「含有率」はGPC測定による「面積%」のことであり、含有率または面積%と表現する場合がある。また、7核体以上の含有率と3核体の含有率を、それぞれ単に「H」、「L」と表現する場合がある。ここで、上記一般式(3)で表されるノボラック型エポキシ樹脂において、3核体とはnが2の場合であり、7核体以上とはnが6以上の場合である。
ここで(L/H)が4.0を超えると3核体が多くなり、平均官能基数が3.8未満となり、リン含有エポキシ樹脂を使用した硬化物の耐熱性が下がり200℃以上のTgを得ることができない。一方(L/H)が0.6未満の場合は7核体以上が多くなり、2核体も少なくなるため、硬化物が硬脆くなり、難燃性が大きく損なわれる。
アルデヒド類としては、ホルムアルデヒド、アセトアルデヒド、プロピルアルデヒド、ブチルアルデヒド、バレルアルデヒド、カプロンアルデヒド、ベンズアルデヒド、クロルアルデヒド、ブロムアルデヒド、グリオキザール、マロンアルデヒド、スクシンアルデヒド、グルタルアルデヒド、アジピンアルデヒド、ピメリンアルデヒド、セバシンアルデヒド、アクロレイン、クロトンアルデヒド、サリチルアルデヒド、フタルアルデヒド、ヒドロキシベンズアルデヒドなどが挙げられる。
ビフェニル系縮合剤としてビス(メチロール)ビフェニル、ビス(メトキシメチル)ビフェニル、ビス(エトキシメチル)ビフェニル、ビス(クロロメチル)ビフェニルなどが挙げられる。
ホウ酸エステルとしては、トリブチルボレ-ト、トリメトキシボロキシン、ホウ酸エチル、エポキシ-フェノール-ホウ酸エステル配合物(例えば、キュアダクトL-07N(四国化成工業株式会社製)など)などが挙げられ、アルキルリン酸エステルとしては、リン酸トリメチル、リン酸トリブチルなどが挙げられる。
反応遅延剤は単独でも複数を混合して使用してもよいが、使用量の調整のしやすさから単独が好ましく、とりわけホウ酸が少量の使用でその効果が最も良好である。使用の際はメタノールやブタノール、2-プロパノールなどのアルコール系溶剤に溶解して5~20質量%の濃度で使用することができる。特に硬化剤がジシアンジアミドの場合は、硬化剤1モルに対してホウ酸0.1~0.5モルが好ましく、0.15~0.35モルが、遅延効果と耐熱性を得る上でより好ましい。また硬化剤がフェノール系硬化剤の場合は、リン含有エポキシ樹脂に対して0.1~5質量部が好ましく、0.1~1質量部が耐熱性を得る上でより好ましい。特に、ホウ酸使用量が5質量部以上に増えると、硬化性を調整する上でイミダゾールなどの反応促進剤の量を増やす必要があり、硬化物での絶縁信頼性を著しく損なうために好ましくない。
撹拌機、温度調節装置、還流冷却器、全縮器、減圧装置などを備えた4つ口のガラス製セパラブルフラスコに、フェノールを1000部加えて80℃まで昇温した後、2.8部のシュウ酸2水和物を添加して撹拌溶解し、142部の37.5%ホルマリンを30分間かけて滴下した。その後、反応温度を92℃に維持して3時間反応を行った。反応終了後、110℃まで温度を上げて脱水した後、残存するフェノールを150℃、60mmHgの回収条件で約90%回収した後、5mmHgの回収条件で回収した後、さらに160℃、80mmHgの条件下で水10部を90分間かけて滴下して残存するフェノールを除去した後、溶融しているフェノールノボラック樹脂中に窒素ガスを60分間バブリングして、フェノールノボラック樹脂(N0)を得た。
得られたN0を280℃、5mmHgの薄膜蒸留器を使用して2核体の一部をさらに留出除去してフェノールノボラック樹脂(N1)を得た。得られたN1は軟化点65℃で、2核体10.8面積%、3核体52.9面積%、4核体21.8面積%、5核体8.5面積%、6核体6.0面積%、実平均分子量は355であった。
合成例1で得たN0を使用して300℃、5mmHgの薄膜蒸留器を使用して2核体の一部をさらに強く留出除去してフェノールノボラック樹脂(N2)を得た。得られたN2は軟化点66℃で、2核体5.9面積%、3核体58.4面積%、4核体22.9面積%、5核体8.3面積%、6核体4.6面積%、実平均分子量は356であった。
撹拌機、温度調節装置、還流冷却器、全縮器、窒素ガス導入装置、減圧装置および滴下装置を備えた4つ口のガラス製セパラブルフラスコに、合成例1で得られたN1を1000部、シュウ酸二水和物0.38部を仕込み、窒素ガスを導入しながら撹拌を行い、加熱を行って昇温した。37.5%ホルマリン13.5部を80℃で滴下を開始し30分で滴下を終了した。その後、反応温度を92℃に保ち3時間反応を行い次いで110℃まで昇温して反応生成水を系外に除去した。最後に160℃下で2時間の加温を行い、フェノールノボラック樹脂(N3)を得た。得られたN3は軟化点63℃で、2核体9.4面積%、3核体48.1面積%、7核体以上9.0面積%、Mn552であった。
N1を1000部、シュウ酸二水和物を0.63部、37.5%ホルマリンを22.5部の仕込み以外は、合成例3と同様にしてフェノールノボラック樹脂(N4)を得た。得られたN4は軟化点69℃で、2核体8.0面積%、3核体43.7面積%、7核体以上14.2面積%、Mn574であった。その後、合成例3と同様に、N4のエポキシ化を行って、フェノールノボラック型エポキシ樹脂(E2)を得た。
N1を1000部、シュウ酸二水和物を1.89部、37.5%ホルマリンを67.6部の仕込み以外は、合成例3と同様にしてフェノールノボラック樹脂(N5)を得た。得られたN5は軟化点78℃で、2核体7.2面積%、3核体31.2面積%、7核体以上30.9面積%、Mn690であった。その後、合成例3と同様に、N5のエポキシ化を行って、フェノールノボラック型エポキシ樹脂(E3)を得た。
N2を1000部、シュウ酸二水和物を0.63部、37.5%ホルマリンを22.5部の仕込み以外は、合成例3と同様にしてフェノールノボラック樹脂(N6)を得た。得られたN6は軟化点70℃で、2核体5.1面積%、3核体45.8面積%、7核体以上14.4面積%、Mn589であった。その後、合成例3と同様に、N6のエポキシ化を行って、フェノールノボラック型エポキシ樹脂(E4)を得た。
LV-70S(群栄化学工業株式会社製フェノールノボラック樹脂、軟化点65℃、2核体1.0面積%、3核体74.7面積%、4核体18.1面積%、5核体6.2面積%、実測数平均分子量337)を1000部、シュウ酸二水和物を0.66部、37.5%ホルマリンを23.7部の仕込み以外は、合成例3と同様にしてフェノールノボラック樹脂(N7)を得た。得られたN7は軟化点67℃で、2核体1.1面積%、3核体57.3面積%、6核体と7核体の分離は困難であり6核体以上の含有率が22.0面積%、Mn580であった。その後、合成例3と同様に、N7のエポキシ化を行って、フェノールノボラック型エポキシ樹脂(E5)を得た。
N1を1000部、シュウ酸二水和物を0.32部、37.5%ホルマリンを11.3部の仕込み以外は、合成例3と同様にしてフェノールノボラック樹脂(N8)を得た。得られたN8は軟化点62℃で、2核体9.6面積%、3核体48.4面積%、7核体以上7.7面積%、Mn545であった。その後、合成例3と同様に、N8のエポキシ化を行って、フェノールノボラック型エポキシ樹脂(E6)を得た。
N1を1000部、シュウ酸二水和物を2.52部、37.4%ホルマリンを90.1部の仕込み以外は、合成例3と同様にしてフェノールノボラック樹脂(N9)を得た。得られたN9は軟化点84℃で2核体5.7面積%、3核体24.1面積%、7核体以上41.5面積%、Mn748であった。その後、合成例3と同様に、N9のエポキシ化を行って、フェノールノボラック型エポキシ樹脂(E7)を得た。
YDPN-638(フェノールノボラック型エポキシ樹脂、日鉄ケミカル&マテリアル株式会社製、エポキシ当量178)とYDF-170(ビスフェノールF型液状エポキシ樹脂、日鉄ケミカル&マテリアル株式会社製、エポキシ当量168)を1/1(質量比)で溶融混同して、フェノールノボラック型エポキシ樹脂(E11)を得た。
E1:合成例3で得られたフェノールノボラック型エポキシ樹脂(エポキシ当量171、Mn650、3核体40.6面積%、7核体以上20.9面積%)
E2:合成例4で得られたフェノールノボラック型エポキシ樹脂(エポキシ当量172、Mn682、3核体36.4面積%、7核体以上26.7面積%)
E3:合成例5で得られたフェノールノボラック型エポキシ樹脂(エポキシ当量173、Mn824、3核体26.1面積%、7核体以上42.2面積%)
E4:合成例6で得られたフェノールノボラック型エポキシ樹脂(エポキシ当量174、Mn693、3核体38.8面積%、7核体以上26.0面積%)
E5:合成例7で得られたフェノールノボラック型エポキシ樹脂(エポキシ当量173、Mn669、3核体48.9面積%、7核体以上14.6面積%)
E6:合成例8で得られたフェノールノボラック型エポキシ樹脂(エポキシ当量171、Mn623、3核体41.9面積%、7核体以上19.9面積%)
E7:合成例9で得られたフェノールノボラック型エポキシ樹脂(エポキシ当量175、Mn858、3核体20.7面積%、7核体以上48.5面積%)
E8:フェノールノボラック型エポキシ樹脂(日鉄ケミカル&マテリアル株式会社製、YDPN-6300、エポキシ当量175、Mn653、3核体35.2面積%、7核体以上21.8面積%)
E9:フェノールノボラック型エポキシ樹脂(日鉄ケミカル&マテリアル株式会社製、YDPN-638、エポキシ当量178、Mn662、3核体14.7面積%、7核体以上38.6面積%)
E10:フェノールノボラック型エポキシ樹脂(DIC株式会社製、N775、エポキシ当量187、Mn1308、3核体6.7面積%、7核体以上71.6面積%)
E11:合成例10で得られたフェノールノボラック型エポキシ樹脂(エポキシ当量173、Mn468、3核体12.1面積%、7核体以上19.3面積%)
E12:3官能エポキシ樹脂(三井化学株式会社製、VG-3101、エポキシ当量219)
B1:ジシアンジアミド(日本カーバイド株式会社製、ジシアンジアミド、活性水素当量21)
B2:トリアジン環およびヒドロキシフェニル基含有化合物(群栄化学工業株式会社製、PS-6313、活性水素当量148)
B3:アラルキル型多価フェノール樹脂(日鉄ケミカル&マテリアル株式会社製、NX-1723、活性水素当量152)
B4:トリスフェニルメタン型多価フェノール樹脂(明和化成工業株式会社製、MEH-7500H、活性水素当量100)
B5:フェノールノボラック樹脂(群栄化学工業株式会社製、レヂトップPSM-6358、軟化点118℃、活性水素当量106)
B6:ベンゾオキサジン樹脂(日鉄ケミカル&マテリアル株式会社製、YBZ-2213、軟化点75℃、活性水素当量217)
B7:ベンゾオキサジン樹脂(ハンツマン社製、LMB6490、軟化点98℃、活性水素当量276)
B8:ベンゾオキサジン樹脂(四国化成工業株式会社製、F-a型、軟化点61℃、活性水素当量212)
C1:2-エチル-4-メチルイミダゾール(硬化促進剤、四国化成工業株式会社製、キュアゾール2E4MZ)
FR1:シクロホスファゼン(非ハロゲン難燃剤、株式会社伏見製薬所製、ラビトルFP-100、リン含有率13%)
FR2:水酸化マグネシウム(非ハロゲン難燃剤、充填剤、協和化学工業株式会社製、キスマ5、平均粒子径:約0.8~1.0μm)
撹拌機、温度調節装置、還流冷却器、全縮器、窒素ガス導入装置を備えた4つ口のガラス製セパラブルフラスコに、HCA(三光株式会社製、DOPO)100部とトルエン185部を仕込み、80℃で加温溶解した。その後、1,4-ナフトキノン(NQ)62.2部を反応熱による昇温に注意しながら分割投入した。このときNQとDOPOのモル比(NQ/DOPO)は0.85であった。この反応後、エポキシ樹脂E1を627部仕込み、窒素ガスを導入しながら撹拌を行い、130℃まで加熱を行って溶解した。トリフェニルホスフィン(TPP)を0.08部添加して150℃で4時間反応した後、メトキシプロパノールを42部投入して140℃でさらに2時間反応を行って、リン含有エポキシ樹脂(PE1)を得た。
表1の配合量(部)で配合し、実施例1と同様の操作を行い、リン含有エポキシ樹脂を得た。リン含有エポキシ樹脂の物性値を表1に示した。なお、「反応率」は、実測エポキシ当量から計算で求めた原料リン化合物の消費率を表し、「L/H」は使用したフェノールノボラック型エポキシ樹脂の7核体以上の含有率(面積%、H)に対する3核体の含有率(面積%、L)の比を表し、「Mn/E」は平均官能基数を表す。
表2の配合量(部)で配合し、実施例1と同様の操作を行い、リン含有エポキシ樹脂を得た。リン含有エポキシ樹脂の物性値を表2に示した。
リン含有エポキシ樹脂(PE1)を100部、硬化剤(B1)を3.7部、10%ホウ酸メタノール溶液を0.5部配合した。配合の際にエポキシ樹脂はメチルエチルケトンで溶解したワニスの状態で仕込み、硬化剤はメトキシプロパノールとN,N-ジメチルホルムアミドの混合溶媒に溶解して配合し、メチルエチルケトン、メトキシプロパノールにて不揮発分を50%となるように調整した。その後、このワニスでのゲルタイムが171℃下で150~350秒になるように、硬化促進剤(2E4MZ)のメトキシプロパノール溶液を使用して調整を行って、リン含有エポキシ樹脂組成物ワニスを得た。
表3の配合量(部)で配合し、実施例9と同様の操作を行い、積層板を得た。実施例9と同様の試験を行い、その結果を表3に示す。
表4の配合量(部)で配合し、実施例9と同様の操作を行い、積層板を得た。実施例9と同様の試験を行い、その結果を表4に示す。
表5の配合量(部)で配合し、実施例9と同様の操作を行い、リン含有エポキシ樹脂組成物ワニスを得た後、ホモディスパーを使用して、FR1やFR2を5000rpmのせん断撹拌をしながら分割投入し、約10分間の均一分散を行った。硬化温度条件を210℃×80分に変更した以外は実施例9と同様の操作を行い、積層板試験片を得た。実施例9と同様の試験を行い、その結果を表5に示す。
Claims (8)
- リン含有エポキシ樹脂と硬化剤を含み、リン含有率が1.0~1.8質量%の範囲であるエポキシ樹脂組成物であって、リン含有エポキシ樹脂は、ゲルパーミネーションクロマトグラフィー測定による7核体以上の含有率(面積%、H)に対する3核体の含有率(面積%、L)の比(L/H)が0.6~4.0の範囲であり、かつ標準ポリスチレン換算値による数平均分子量(Mn)をエポキシ当量(E)で除した平均官能基数(Mn/E)が3.8~4.8の範囲であるノボラック型エポキシ樹脂と、下記一般式(1)および/または一般式(2)で表されるリン化合物とから得られた生成物であることを特徴とするエポキシ樹脂組成物。
式中、R1およびR2はヘテロ原子を有してもよい炭素数1~20の炭化水素基であり、それぞれ異なっていても同一でも良く、直鎖状、分岐鎖状、環状であってもよく、R1とR2が結合し、環状構造部位となっていてもよい。n1およびn2はそれぞれ独立に0または1である。Aは3価の炭素数6~20の芳香族炭化水素基である。 - ノボラック型エポキシ樹脂がフェノールノボラック型エポキシ樹脂である請求項1に記載のエポキシ樹脂組成物。
- 硬化剤がジシアンジアミド、フェノール樹脂およびオキサジン樹脂から選択される一種または二種以上を含む請求項1に記載のエポキシ樹脂組成物。
- 請求項1~3のいずれか1項に記載のエポキシ樹脂組成物を基材に含浸してなるプリプレグ。
- 請求項1~3のいずれか1項に記載のエポキシ樹脂組成物を硬化してなる積層板。
- 請求項1~3のいずれか1項に記載のエポキシ樹脂組成物を使用して得られる回路基板用材料。
- 請求項1~3のいずれか1項に記載のエポキシ樹脂組成物を硬化してなる硬化物。
- ノボラック型エポキシ樹脂と、下記一般式(1)および/または一般式(2)で表されるリン化合物とから得られるリン含有エポキシ樹脂の製造方法であって、ノボラック型エポキシ樹脂が、ゲルパーミネーションクロマトグラフィー測定による7核体以上の含有率(面積%、H)に対する3核体の含有率(面積%、L)の比(L/H)が0.6~4.0の範囲であり、かつ標準ポリスチレン換算値による数平均分子量(Mn)をエポキシ当量(E)で除した平均官能基数(Mn/E)が3.8~4.8の範囲であることを特徴とするリン含有エポキシ樹脂の製造方法。
式中、R1およびR2はヘテロ原子を有してもよい炭素数1~20の炭化水素基であり、それぞれ異なっていても同一でも良く、直鎖状、分岐鎖状、環状であってもよく、R1とR2が結合し、環状構造部位となっていてもよい。n1およびn2はそれぞれ独立に0または1である。Aは3価の炭素数6~20の芳香族炭化水素基である。
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| US17/271,216 US11421071B2 (en) | 2018-08-27 | 2019-08-20 | Phosphorus-containing epoxy resin, epoxy resin composition, prepreg, laminated plate, material for circuit board and cured product |
| KR1020217003041A KR102776036B1 (ko) | 2018-08-27 | 2019-08-20 | 인 함유 에폭시 수지, 에폭시 수지 조성물, 프리프레그, 적층판, 회로기판용 재료 및 경화물 |
| EP19855018.8A EP3845578B1 (en) | 2018-08-27 | 2019-08-20 | Phosphorous-containing epoxy resin, epoxy resin composition, prepreg, laminated plate, material for circuit board and cured product |
| JP2020539365A JP7405751B2 (ja) | 2018-08-27 | 2019-08-20 | リン含有エポキシ樹脂、エポキシ樹脂組成物、プリプレグ、積層板、回路基板用材料および硬化物 |
| CN201980055011.0A CN112585189B (zh) | 2018-08-27 | 2019-08-20 | 环氧树脂组合物、预浸体、层叠板、电路基板用材料、硬化物及含磷环氧树脂的制造方法 |
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| JP2021088656A (ja) * | 2019-12-04 | 2021-06-10 | 日鉄ケミカル&マテリアル株式会社 | エポキシ樹脂組成物、それを使用した積層板及びプリント回路基板 |
| CN113185706A (zh) * | 2021-06-01 | 2021-07-30 | 韩光军 | 一种阻燃添加剂、含该添加剂的阻燃abs塑料及制备方法 |
| JP2022155158A (ja) * | 2021-03-30 | 2022-10-13 | Ube株式会社 | アミン変性フェノールノボラック樹脂 |
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| WO2019065470A1 (ja) * | 2017-09-29 | 2019-04-04 | 日鉄ケミカル&マテリアル株式会社 | 硬化性エポキシ樹脂組成物、及びそれを用いた繊維強化複合材料 |
| JP7314143B2 (ja) * | 2018-08-03 | 2023-07-25 | Eneos株式会社 | 硬化樹脂用組成物、該組成物の硬化物、該組成物および該硬化物の製造方法、ならびに半導体装置 |
| JP7505661B2 (ja) * | 2022-06-10 | 2024-06-25 | 株式会社レゾナック | 成形用樹脂組成物及び電子部品装置 |
| CN116875151A (zh) * | 2023-08-10 | 2023-10-13 | 江苏云湖新材料科技有限公司 | 一种电池包壳体用无卤阻燃环氧防火涂料及其制备方法 |
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| JP7387413B2 (ja) | 2019-12-04 | 2023-11-28 | 日鉄ケミカル&マテリアル株式会社 | エポキシ樹脂組成物、それを使用した積層板及びプリント回路基板 |
| JP2022155158A (ja) * | 2021-03-30 | 2022-10-13 | Ube株式会社 | アミン変性フェノールノボラック樹脂 |
| JP7707609B2 (ja) | 2021-03-30 | 2025-07-15 | Ube株式会社 | アミン変性フェノールノボラック樹脂 |
| CN113185706A (zh) * | 2021-06-01 | 2021-07-30 | 韩光军 | 一种阻燃添加剂、含该添加剂的阻燃abs塑料及制备方法 |
| CN113185706B (zh) * | 2021-06-01 | 2022-12-20 | 深圳市嘉凯勒实业有限公司 | 一种阻燃添加剂、含该添加剂的阻燃abs塑料及制备方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112585189A (zh) | 2021-03-30 |
| JPWO2020045150A1 (ja) | 2021-08-26 |
| US20210253783A1 (en) | 2021-08-19 |
| CN112585189B (zh) | 2023-08-01 |
| KR102776036B1 (ko) | 2025-03-07 |
| EP3845578B1 (en) | 2023-06-07 |
| EP3845578A1 (en) | 2021-07-07 |
| KR20210047861A (ko) | 2021-04-30 |
| TW202009248A (zh) | 2020-03-01 |
| JP7405751B2 (ja) | 2023-12-26 |
| EP3845578A4 (en) | 2022-07-06 |
| US11421071B2 (en) | 2022-08-23 |
| TWI823991B (zh) | 2023-12-01 |
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