JP6304294B2 - Epoxy resin composition, prepreg using this epoxy resin composition, resin film with support, metal foil-clad laminate and multilayer printed wiring board - Google Patents
Epoxy resin composition, prepreg using this epoxy resin composition, resin film with support, metal foil-clad laminate and multilayer printed wiring board Download PDFInfo
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- 239000003822 epoxy resin Substances 0.000 title claims description 97
- 229920000647 polyepoxide Polymers 0.000 title claims description 97
- 239000000203 mixture Substances 0.000 title claims description 64
- 229920005989 resin Polymers 0.000 title claims description 48
- 239000011347 resin Substances 0.000 title claims description 48
- 229910052751 metal Inorganic materials 0.000 title claims description 16
- 239000002184 metal Substances 0.000 title claims description 16
- 229910052698 phosphorus Inorganic materials 0.000 claims description 100
- 239000011574 phosphorus Substances 0.000 claims description 95
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 81
- 239000003795 chemical substances by application Substances 0.000 claims description 73
- 239000000126 substance Substances 0.000 claims description 57
- 229920003986 novolac Polymers 0.000 claims description 19
- 239000005011 phenolic resin Substances 0.000 claims description 17
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 claims description 14
- 229930003836 cresol Natural products 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 11
- 239000011888 foil Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 3
- 239000011342 resin composition Substances 0.000 claims description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 63
- 238000004519 manufacturing process Methods 0.000 description 34
- 239000002966 varnish Substances 0.000 description 26
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 18
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 18
- 238000000034 method Methods 0.000 description 17
- -1 bromine is added Chemical class 0.000 description 15
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 15
- 239000000945 filler Substances 0.000 description 13
- 125000000962 organic group Chemical group 0.000 description 13
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 10
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 239000002904 solvent Substances 0.000 description 9
- 125000000217 alkyl group Chemical group 0.000 description 8
- APOXBWCRUPJDAC-UHFFFAOYSA-N bis(2,6-dimethylphenyl) hydrogen phosphate Chemical compound CC1=CC=CC(C)=C1OP(O)(=O)OC1=C(C)C=CC=C1C APOXBWCRUPJDAC-UHFFFAOYSA-N 0.000 description 8
- 125000004432 carbon atom Chemical group C* 0.000 description 8
- 239000002002 slurry Substances 0.000 description 8
- ZCUJYXPAKHMBAZ-UHFFFAOYSA-N 2-phenyl-1h-imidazole Chemical compound C1=CNC(C=2C=CC=CC=2)=N1 ZCUJYXPAKHMBAZ-UHFFFAOYSA-N 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 7
- 125000004437 phosphorous atom Chemical group 0.000 description 7
- 230000009257 reactivity Effects 0.000 description 6
- 239000011889 copper foil Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 5
- 125000003118 aryl group Chemical group 0.000 description 4
- 125000003700 epoxy group Chemical group 0.000 description 4
- 150000002366 halogen compounds Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- ZRSNZINYAWTAHE-UHFFFAOYSA-N p-methoxybenzaldehyde Chemical compound COC1=CC=C(C=O)C=C1 ZRSNZINYAWTAHE-UHFFFAOYSA-N 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 3
- 229910052794 bromium Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000009477 glass transition Effects 0.000 description 3
- 239000011256 inorganic filler Substances 0.000 description 3
- 229910003475 inorganic filler Inorganic materials 0.000 description 3
- 230000008961 swelling Effects 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- KJCVRFUGPWSIIH-UHFFFAOYSA-N 1-naphthol Chemical compound C1=CC=C2C(O)=CC=CC2=C1 KJCVRFUGPWSIIH-UHFFFAOYSA-N 0.000 description 2
- JWAZRIHNYRIHIV-UHFFFAOYSA-N 2-naphthol Chemical compound C1=CC=CC2=CC(O)=CC=C21 JWAZRIHNYRIHIV-UHFFFAOYSA-N 0.000 description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- NBBJYMSMWIIQGU-UHFFFAOYSA-N Propionic aldehyde Chemical compound CCC=O NBBJYMSMWIIQGU-UHFFFAOYSA-N 0.000 description 2
- 239000006087 Silane Coupling Agent Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 description 2
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001721 carbon Chemical group 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 150000002989 phenols Chemical class 0.000 description 2
- 230000002250 progressing effect Effects 0.000 description 2
- SMQUZDBALVYZAC-UHFFFAOYSA-N salicylaldehyde Chemical compound OC1=CC=CC=C1C=O SMQUZDBALVYZAC-UHFFFAOYSA-N 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- BLBVJHVRECUXKP-UHFFFAOYSA-N 2,3-dimethoxy-1,4-dimethylbenzene Chemical group COC1=C(C)C=CC(C)=C1OC BLBVJHVRECUXKP-UHFFFAOYSA-N 0.000 description 1
- BSYJHYLAMMJNRC-UHFFFAOYSA-N 2,4,4-trimethylpentan-2-ol Chemical compound CC(C)(C)CC(C)(C)O BSYJHYLAMMJNRC-UHFFFAOYSA-N 0.000 description 1
- KMRIWYPVRWEWRG-UHFFFAOYSA-N 2-(6-oxobenzo[c][2,1]benzoxaphosphinin-6-yl)benzene-1,4-diol Chemical compound OC1=CC=C(O)C(P2(=O)C3=CC=CC=C3C3=CC=CC=C3O2)=C1 KMRIWYPVRWEWRG-UHFFFAOYSA-N 0.000 description 1
- DWGLLTZGGCSKDQ-UHFFFAOYSA-N 5-(6-oxobenzo[c][2,1]benzoxaphosphinin-6-yl)naphthalene-1,6-diol Chemical compound O1C2=CC=CC=C2C2=CC=CC=C2P1(=O)C1=C2C=CC=C(O)C2=CC=C1O DWGLLTZGGCSKDQ-UHFFFAOYSA-N 0.000 description 1
- 229930185605 Bisphenol Natural products 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- 230000001588 bifunctional effect Effects 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N butyric aldehyde Natural products CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- NXPPAOGUKPJVDI-UHFFFAOYSA-N naphthalene-1,2-diol Chemical compound C1=CC=CC2=C(O)C(O)=CC=C21 NXPPAOGUKPJVDI-UHFFFAOYSA-N 0.000 description 1
- 150000004780 naphthols Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 150000003018 phosphorus compounds Chemical class 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 1
- 229960001755 resorcinol Drugs 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 description 1
- 125000002256 xylenyl group Chemical class C1(C(C=CC=C1)C)(C)* 0.000 description 1
- 125000006839 xylylene group Chemical group 0.000 description 1
Description
本発明は、プリント配線板用エポキシ樹脂組成物に関し、前記エポキシ樹脂組成物を用いたプリプレグ、支持体付き樹脂フィルム、金属箔張り積層板及び多層プリント配線板に関する。 The present invention relates to an epoxy resin composition for a printed wiring board, and relates to a prepreg using the epoxy resin composition, a resin film with a support, a metal foil-clad laminate, and a multilayer printed wiring board.
パーソナルコンピュータや携帯電話等の情報端末機器の普及に伴って、これらに搭載されるプリント配線板の小型化、高密度化が進んでいる。その実装形態は、ピン挿入型から表面実装型へ、更にはプラスチック基板を使用したＢＧＡ（ボールグリッドアレイ）に代表されるエリアアレイ型へと進んでいる。ＢＧＡのようにベアチップが直接実装される基板では、チップと基板との接続は、熱超音波圧着によるワイヤボンディングで行なわれるのが一般的である。熱超音波圧着では、ベアチップを実装する基板は、１５０℃以上の高温にさらされる。このため、電気絶縁性樹脂には、熱超音波圧着の温度条件に耐え得る耐熱性が必要となる。 With the spread of information terminal devices such as personal computers and mobile phones, miniaturization and high density of printed wiring boards mounted on them are progressing. The mounting form is progressing from a pin insertion type to a surface mounting type, and further to an area array type represented by BGA (ball grid array) using a plastic substrate. In a substrate on which a bare chip is directly mounted, such as a BGA, the connection between the chip and the substrate is generally performed by wire bonding by thermosonic bonding. In thermosonic bonding, the substrate on which the bare chip is mounted is exposed to a high temperature of 150 ° C. or higher. For this reason, the electrically insulating resin is required to have heat resistance that can withstand the temperature condition of thermosonic bonding.
更に、一度実装したチップを基板から外す、いわゆるリペア性も要求される場合がある。チップを基板から外す際には、チップ実装時と同程度の熱がかけられる。また、基板にチップが再度実装される際に、更に熱処理が加えられることになる。この繰り返し加熱によって、従来の絶縁性樹脂系では、プリプレグの繊維基材と樹脂との間で剥離を起こすことがある。リペア性が要求される基板では、繰り返し高温に曝されることに対する耐性（耐熱衝撃性）が要求される。 Furthermore, there is a case where so-called repairability is required in which a chip once mounted is removed from the substrate. When the chip is removed from the substrate, the same amount of heat as that during chip mounting is applied. Further, when the chip is mounted again on the substrate, further heat treatment is applied. This repeated heating may cause peeling between the prepreg fiber substrate and the resin in the conventional insulating resin system. A substrate that requires repairability is required to have resistance (thermal shock resistance) against repeated exposure to high temperatures.
エポキシ樹脂に臭素等のハロゲン元素を含むハロゲン化合物を添加することによって、難燃性を確保することができるが、燃焼によって一酸化炭素やシアン化水素が発生する場合がある。また、臭素等のハロゲン化合物が添加されたエポキシ樹脂では、加熱の際に臭素が分解し、耐熱性の低下や信頼性の低下が起こり得る。そのため、エポキシ樹脂にハロゲン化合物を添加せずに、難燃性を確保できる成形物の開発が望まれていた。
ハロゲン化合物を添加せずに、難燃性を確保する方法としては、窒素、珪素、水酸化アルミニウム等のフィラーを配合する方法が挙げられる。その中でもリン化合物を配合する方法が広く用いられている。例えば、リン酸エステル系の化合物であるトリフェニルホスフェート（ＴＰＰ）やトリクレジルホスフェート（ＴＣＰ）が用いられる（例えば、特許文献１参照）。しかし、これらのリン化合物は、エポキシ樹脂中に添加されても、エポキシ樹脂と反応することがないため、得られた成形物の、吸湿後の耐熱性や耐薬品性等が低下するという問題が生じた。
By adding a halogen compound containing a halogen element such as bromine to the epoxy resin, flame retardancy can be ensured, but carbon monoxide and hydrogen cyanide may be generated by combustion. In addition, in an epoxy resin to which a halogen compound such as bromine is added, bromine is decomposed during heating, and heat resistance and reliability may be reduced. Therefore, it has been desired to develop a molded product that can ensure flame retardancy without adding a halogen compound to the epoxy resin.
Examples of a method for ensuring flame retardancy without adding a halogen compound include a method of blending a filler such as nitrogen, silicon, or aluminum hydroxide. Among them, a method of blending a phosphorus compound is widely used. For example, triphenyl phosphate (TPP) and tricresyl phosphate (TCP), which are phosphate compounds, are used (for example, see Patent Document 1). However, since these phosphorus compounds do not react with the epoxy resin even when added to the epoxy resin, there is a problem that the heat resistance, chemical resistance, etc. after moisture absorption of the obtained molded product is lowered. occured.
これに対して、エポキシ樹脂とリン化合物を反応させてリン含有エポキシ樹脂を合成するという方法が提案された（例えば、特許文献２等参照）。しかし、硬化剤として（ジシアンジアミド（ＤＩＣＹ）を用いるために、ジメチルホルムアミド（ＤＭＦ）やジメチルアセトアミド（ＤＭＡｃ）等のように、環境に高負荷の溶媒を使用せざるを得ないという問題があった。また、昨今に要求されている低吸湿性、耐熱衝撃性等に十分に対応できているとは言えなかった。 On the other hand, a method of synthesizing a phosphorus-containing epoxy resin by reacting an epoxy resin and a phosphorus compound has been proposed (see, for example, Patent Document 2). However, since a dicyandiamide (DICY) is used as a curing agent, there is a problem that a high load solvent must be used in the environment such as dimethylformamide (DMF) and dimethylacetamide (DMAc). Moreover, it could not be said that it was able to sufficiently cope with low moisture absorption, thermal shock resistance, and the like that are required recently.
更に、例えば、１０−（２，５−ジヒドロキシフェニル）−１０Ｈ−９−オキサ−１０−ホスファフェナンスレン−１０−オキサイド（三光株式会社製、商品名：ＨＣＡ−ＨＱ）、１０−（２，５−ジヒドロキシナフチル）−１０Ｈ−９−オキサ−１０−ホスファフェナンスレン−１０−オキサイド（三光株式会社製、商品名：ＨＣＡ−ＮＱ）等のリン化合物や、その誘導体を硬化剤として用いる方法も挙げられる。
しかし、これらの硬化剤は、溶媒への溶解性が低いため、プレ反応を必要とし、製造工程が煩雑になる等、取り扱い性が低下する問題があった。
Further, for example, 10- (2,5-dihydroxyphenyl) -10H-9-oxa-10-phosphaphenanthrene-10-oxide (manufactured by Sanko Co., Ltd., trade name: HCA-HQ), 10- (2 , 5-dihydroxynaphthyl) -10H-9-oxa-10-phosphaphenanthrene-10-oxide (manufactured by Sanko Co., Ltd., trade name: HCA-NQ) and the like, and derivatives thereof are used as curing agents. A method is also mentioned.
However, since these curing agents have low solubility in a solvent, there is a problem that handling properties are lowered, for example, a pre-reaction is required and a manufacturing process becomes complicated.
本発明は、以上の問題点を解決するためになされたものであり、取り扱い性に優れ、反応性が高く、難燃性に優れ、更に高耐熱性を付与されたエポキシ樹脂組成物を提供するものである。 The present invention has been made in order to solve the above problems, and provides an epoxy resin composition having excellent handling properties, high reactivity, excellent flame retardancy, and high heat resistance. Is.
本発明は次のものに関する。
［１］（Ａ）リン含有硬化剤と、（Ｂ）エポキシ樹脂とを含有し、該（Ａ）リン含有硬化剤は、下記化学式（１）で示されるリン化合物であり、化学式（１）におけるＲで示される有機基が、フェノール性水酸基を２個以上有し、該有機基の分子量が１９０以上であるエポキシ樹脂組成物。
The present invention relates to the following.
[1] It contains (A) a phosphorus-containing curing agent and (B) an epoxy resin, and the (A) phosphorus-containing curing agent is a phosphorus compound represented by the following chemical formula (1), An epoxy resin composition in which the organic group represented by R has two or more phenolic hydroxyl groups, and the molecular weight of the organic group is 190 or more.
［２］化学式（１）におけるＲで示される有機基が、下記の構造単位を有する上記［１］のエポキシ樹脂組成物。 [2] The epoxy resin composition according to the above [1], wherein the organic group represented by R in the chemical formula (1) has the following structural unit.
（上記構造単位において＊１はそれぞれ炭素原子に結合する。）
(In the above structural unit, each * 1 is bonded to a carbon atom.)
［３］化学式（１）におけるＲで示される有機基が、下記化学式（３）及び（４）から選択される構造の１種又は２種以上を有し、フェノール性水酸基を２個以上有する、上記［１］又は［２］のエポキシ樹脂組成物。
（式（３）、（４）における＊は、化学式（１）のリン原子に直接結合する部位であることを示す。
[3] The organic group represented by R in the chemical formula (1) has one or more of the structures selected from the following chemical formulas (3) and (4), and has two or more phenolic hydroxyl groups. The epoxy resin composition according to the above [1] or [2].
(* In the formulas (3) and (4) indicates a site directly bonded to the phosphorus atom in the chemical formula (1).
（式（３）におけるＲ１は、水素原子又は炭素数１〜３のアルキル基であり、Ｒ２は、炭素数１〜４のアルキル基である。ｎは芳香環におけるＯＲ２基の数であり、１〜３のいずれかである。また、ＲＡは、フェノール性水酸基を２個以上有する有機基である。）
(R 1 in Formula (3) is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and R 2 is an alkyl group having 1 to 4 carbon atoms. N is the number of OR 2 groups in the aromatic ring. Yes, and any one of 1 to 3. In addition, RA is an organic group having two or more phenolic hydroxyl groups.)
（式（４）におけるＲ１は、水素原子又は炭素数１〜３のアルキル基であり、Ｒ２は、炭素数１〜４のアルキル基である。ｎは芳香環におけるＯＲ２基の数であり、１〜３のいずれかである。また、ＲＢは、フェノール性水酸基を２個以上有する有機基である。）
(R 1 in Formula (4) is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and R 2 is an alkyl group having 1 to 4 carbon atoms. N is the number of OR 2 groups in the aromatic ring. There are either 1-3. also, R B is an organic group having two or more phenolic hydroxyl groups.)
［４］上記［１］〜［３］のエポキシ樹脂組成物を基材に含浸させてなるプリプレグ。
［５］上記［１］〜［３］のエポキシ樹脂組成物を支持体に積層してなる支持体付き樹脂フィルム。
［６］上記［４］のプリプレグの一方もしくは両方の面、又は［５］の支持体付き樹脂フィルムの一方もしくは両方の面に金属箔を配してなる金属箔張り積層板。
［７］上記［４］のプリプレグよりなる層、［５］の支持体付き樹脂フィルムの樹脂フィルムよりなる層、及び［６］の金属箔張り積層板よりなる層を１層又は２層以上含む多層プリント配線板。
[4] A prepreg obtained by impregnating a base material with the epoxy resin composition of [1] to [3].
[5] A resin film with a support formed by laminating the epoxy resin composition of the above [1] to [3] on a support.
[6] A metal foil-clad laminate in which metal foil is disposed on one or both surfaces of the prepreg of [4] above or one or both surfaces of the resin film with a support of [5].
[7] One or more layers including a layer formed of the prepreg of [4], a layer formed of a resin film of a resin film with a support of [5], and a layer formed of a metal foil-clad laminate of [6] are included. Multilayer printed wiring board.
本発明によれば、上記化学式（１）で示されるリン含有硬化剤を用いることによって、取り扱い性に優れ、反応性が高く、難燃性に優れ、更に高耐熱性を有するエポキシ樹脂組成物、プリプレグ、支持体付き樹脂フィルム、金属箔張り積層板、多層プリント配線板を得られる。 According to the present invention, by using the phosphorus-containing curing agent represented by the chemical formula (1), an epoxy resin composition having excellent handleability, high reactivity, excellent flame retardancy, and high heat resistance, A prepreg, a resin film with a support, a metal foil-clad laminate, and a multilayer printed wiring board can be obtained.
［エポキシ樹脂組成物］
本発明に係るエポキシ樹脂組成物は、下記化学式（１）で示される（Ａ）リン含有硬化剤と、（Ｂ）エポキシ樹脂を含有し、（Ａ）リン含有硬化剤は、下記化学式（１）で示されるリン化合物であり、化学式（１）におけるＲで示される有機基が、フェノール性水酸基を２個以上有し、該有機基の分子量が１９０以上であることが好ましい。
[Epoxy resin composition]
The epoxy resin composition according to the present invention contains (A) a phosphorus-containing curing agent represented by the following chemical formula (1) and (B) an epoxy resin, and (A) the phosphorus-containing curing agent is represented by the following chemical formula (1). It is preferable that the organic group represented by R in the chemical formula (1) has two or more phenolic hydroxyl groups, and the molecular weight of the organic group is 190 or more.
分子量が１９０以上であると、溶媒に対するリン含有硬化剤の溶解性が向上し、取り扱い性が向上する。このエポキシ樹脂組成物から得られるプリプレグ、支持体付き樹脂フィルム、金属箔張積層板などの成形品は、難燃性に優れるとともに、更に耐熱性、電気特性、耐水性等の特性も非常に良好である。 When the molecular weight is 190 or more, the solubility of the phosphorus-containing curing agent in the solvent is improved, and the handleability is improved. Molded products such as prepregs, resin films with supports, and metal foil-clad laminates obtained from this epoxy resin composition are excellent in flame retardancy, and also have excellent properties such as heat resistance, electrical properties, and water resistance. It is.
＜リン含有硬化剤＞
（リン含有硬化剤の構造）
（Ａ）リン含有硬化剤は、化学式（１）で示されるリン化合物であり、化学式（１）におけるＲで示される有機基が、下記の構造単位を有することが好ましい。
<Phosphorus-containing curing agent>
(Structure of phosphorus-containing curing agent)
(A) The phosphorus-containing curing agent is a phosphorus compound represented by the chemical formula (1), and the organic group represented by R in the chemical formula (1) preferably has the following structural unit.
（上記構造単位において＊１はそれぞれ炭素原子に結合する。）
(In the above structural unit, each * 1 is bonded to a carbon atom.)
また、（Ａ）リン含有硬化剤は、化学式（１）で示されるリン化合物であり、化学式（１）におけるＲで示される有機基が、下記化学式（３）及び（４）から選択される構造の１種又は２種以上を有し、フェノール性水酸基を２個以上有することが好ましい。
式（３）、（４）における＊は、化学式（１）のリン原子に直接結合する部位であることを示す。
Moreover, (A) phosphorus containing hardening | curing agent is a phosphorus compound shown by Chemical formula (1), The organic group shown by R in Chemical formula (1) is selected from following Chemical formula (3) and (4) It is preferable that it has 1 type or 2 types or more, and has 2 or more phenolic hydroxyl groups.
* In the formulas (3) and (4) indicates a site directly bonded to the phosphorus atom of the chemical formula (1).
（式（３）におけるＲ１は、水素原子又は炭素数１〜３のアルキル基であり、Ｒ２は、炭素数１〜４のアルキル基である。ｎは芳香環におけるＯＲ２基の数であり、１〜３のいずれかである。また、ＲＡは、フェノール性水酸基を２個以上有する有機基である。）
(R 1 in Formula (3) is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and R 2 is an alkyl group having 1 to 4 carbon atoms. N is the number of OR 2 groups in the aromatic ring. Yes, and any one of 1 to 3. In addition, RA is an organic group having two or more phenolic hydroxyl groups.)
（式（４）におけるＲ１は、水素原子又は炭素数１〜３のアルキル基であり、Ｒ２は、炭素数１〜４のアルキル基である。ｎは芳香環におけるＯＲ２基の数であり、１〜３のいずれかである。また、ＲＢは、フェノール性水酸基を２個以上有する有機基である。）
(R 1 in Formula (4) is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and R 2 is an alkyl group having 1 to 4 carbon atoms. N is the number of OR 2 groups in the aromatic ring. There are either 1-3. also, R B is an organic group having two or more phenolic hydroxyl groups.)
上記構造単位を有するリン含有硬化剤として更に、化学式（１）におけるＲで示される有機基が、下記化学式（５）、（６）、及び（７）から選択される構造の１種又は２種以上を有し、フェノール性水酸基を２個以上有することが好ましい。
式（５）〜（７）における＊は、化学式（１）のリン原子に直接結合する部位であることを示す。
As the phosphorus-containing curing agent having the structural unit, the organic group represented by R in the chemical formula (1) is one or two kinds of structures selected from the following chemical formulas (5), (6), and (7) It is preferable to have two or more phenolic hydroxyl groups.
* In the formulas (5) to (7) indicates a site directly bonded to the phosphorus atom of the chemical formula (1).
（リン含有硬化剤１）
（Ａ）リン含有硬化剤は、下記化学式（８）で表される構造単位Ａと化学式（９）で表される構造単位Ｂとを有する樹脂とすることができる。
(Phosphorus-containing curing agent 1)
(A) A phosphorus containing hardening | curing agent can be made into resin which has the structural unit A represented by following Chemical formula (8), and the structural unit B represented by Chemical formula (9).
すなわち、この樹脂は、構造単位Ａが複数個連続してなるユニットを有していてもよく、構造単位Ｂが複数個連続してなるユニットを有していてもよく、構造単位Ａと構造単位Ｂとが交互に連結してなるユニットを有していてもよく、前記三者ユニットが混在した構造を有していてもよい。
上述した構造単位を有するフェノール樹脂をリン含有硬化剤として用いた場合に、該リン含有硬化剤を含むエポキシ樹脂組成物は、取り扱い性に優れ、高い反応性が得られる。また、難燃性に優れ、高耐熱性を有する。
That is, this resin may have a unit in which a plurality of structural units A are continuous, or may have a unit in which a plurality of structural units B are continuous. It may have a unit formed by alternately connecting B and may have a structure in which the three party units are mixed.
When the phenol resin having the structural unit described above is used as a phosphorus-containing curing agent, the epoxy resin composition containing the phosphorus-containing curing agent is excellent in handleability and high reactivity is obtained. Moreover, it is excellent in flame retardancy and has high heat resistance.
（リン含有硬化剤２）
（Ａ）リン含有硬化剤は、下記化学式（１０）で表される構造単位Ｃと化学式（１１）で表される構造単位Ｄとを有する樹脂とすることができる。
(Phosphorus-containing curing agent 2)
(A) The phosphorus-containing curing agent can be a resin having a structural unit C represented by the following chemical formula (10) and a structural unit D represented by the chemical formula (11).
すなわち、この樹脂は、構造単位Ｃが複数個連続してなるユニットを有していてもよく、構造単位Ｄが複数個連続してなるユニットを有していてもよく、構造単位Ｃと構造単位Ｄとが交互に連結してなるユニットを有していてもよく、前記三者ユニットが混在した構造を有していてもよい。
上述した構造単位を有するフェノール樹脂をリン含有硬化剤として用いた場合に、該リン含有硬化剤を含むエポキシ樹脂組成物は、取り扱い性に優れ、高い反応性が得られる。また、難燃性に優れ、高耐熱性を有する。
That is, this resin may have a unit in which a plurality of structural units C are continuous, or may have a unit in which a plurality of structural units D are continuous. It may have a unit formed by alternately connecting D and may have a structure in which the three party units are mixed.
When the phenol resin having the structural unit described above is used as a phosphorus-containing curing agent, the epoxy resin composition containing the phosphorus-containing curing agent is excellent in handleability and high reactivity is obtained. Moreover, it is excellent in flame retardancy and has high heat resistance.
（リン含有硬化剤３）
（Ａ）リン含有硬化剤は、下記化学式（１２）で表される構造単位Ｅと化学式（１３）で表される構造単位Ｆとを有する樹脂とすることができる。
(Phosphorus-containing curing agent 3)
(A) The phosphorus-containing curing agent can be a resin having a structural unit E represented by the following chemical formula (12) and a structural unit F represented by the chemical formula (13).
すなわち、この樹脂は、構造単位Ｅが複数個連続してなるユニットを有していてもよく、構造単位Ｆが複数個連続してなるユニットを有していてもよく、構造単位Ｅと構造単位Ｆとが交互に連結してなるユニットを有していてもよく、前記三者ユニットが混在した構造を有していてもよい。
上述した構造単位を有するフェノール樹脂をリン含有硬化剤として用いた場合に、該リン含有硬化剤を含むエポキシ樹脂組成物は、取り扱い性に優れ、高い反応性が得られる。また、難燃性に優れ、高耐熱性を有する。
That is, this resin may have a unit in which a plurality of structural units E are continuous, or may have a unit in which a plurality of structural units F are continuous. It may have a unit formed by alternately connecting with F, and may have a structure in which the three party units are mixed.
When the phenol resin having the structural unit described above is used as a phosphorus-containing curing agent, the epoxy resin composition containing the phosphorus-containing curing agent is excellent in handleability and high reactivity is obtained. Moreover, it is excellent in flame retardancy and has high heat resistance.
（リン含有硬化剤の製造方法）
化学式（１）で表される（Ａ）リン含有硬化剤は、化学式（１４）で表されるリン化合物に、フェノール性水酸基を有する化合物を反応して得られる。また、場合により、ｐ−アニスアルデヒドを添加してもよい。
(Method for producing phosphorus-containing curing agent)
The (A) phosphorus-containing curing agent represented by the chemical formula (1) is obtained by reacting a phosphorus compound represented by the chemical formula (14) with a compound having a phenolic hydroxyl group. In some cases, p-anisaldehyde may be added.
化学式（１４）中のＸは、Ｈ原子又はハロゲン原子である。
X in the chemical formula (14) is an H atom or a halogen atom.
リン含有硬化剤の製造にかかり使用可能なフェノール性水酸基を有する化合物としては、１分子中に２個以上のフェノール性水酸基を有する化合物が好ましく、フェノール、クレゾール、キシレノール、レゾルシン、カテコール、ビスフェノールＡ、ビスフェノールＦなどのフェノール類又はα−ナフトール、β−ナフトール、ジヒドロキシナフタレン等のナフトール類とホルムアルデヒド、アセトアルデヒド、プロピオンアルデヒド、ベンズアルデヒド、サリチルアルデヒド等のアルデヒド類とを酸性触媒下で縮合又は共縮合させて得られる樹脂（ノボラック類）、ポリパラビニルフェノール樹脂、フェノール類とジメトキシパラキシレンから合成されるキシリレン基を有するフェノール・アラルキル樹脂などがあり、単独又は２種類以上併用してもよい。 As a compound having a phenolic hydroxyl group that can be used in the production of a phosphorus-containing curing agent, a compound having two or more phenolic hydroxyl groups in one molecule is preferable, and phenol, cresol, xylenol, resorcin, catechol, bisphenol A, Obtained by condensing or co-condensing phenols such as bisphenol F or naphthols such as α-naphthol, β-naphthol, dihydroxynaphthalene and the like and aldehydes such as formaldehyde, acetaldehyde, propionaldehyde, benzaldehyde, salicylaldehyde in the presence of an acidic catalyst. Resins (novolaks), polyparavinylphenol resins, phenol / aralkyl resins having a xylylene group synthesized from phenols and dimethoxyparaxylene, alone or in combination of two or more May be used.
＜エポキシ樹脂＞
本発明のエポキシ樹脂組成物に用いる（Ｂ）エポキシ樹脂としては、分子内に平均１．８個以上のエポキシ基を有するものが好ましい。中でも、分子内に平均して１．８〜２．５個（約２個）のエポキシ基を有するエポキシ樹脂（２官能のエポキシ樹脂）を用いた場合、樹脂の可塑化効果が大きい。この分子内に平均して１．８〜２．５個（約２個）のエポキシ基を有するエポキシ樹脂として、ビスフェノールＡ型エポキシ樹脂を用いた場合、接着力等の良好な硬化物となり、ビスフェノールＦ型エポキシ樹脂を用いた場合、難燃性が得られ易くなり、ビフェニル型エポキシ樹脂を用いた場合、吸水率が低く、高Ｔｇ（ガラス転移温度）の硬化物となる。また、ナフタレン型エポキシ樹脂を用いることにより、Ｔｇが高い硬化物が得られる。
<Epoxy resin>
The (B) epoxy resin used in the epoxy resin composition of the present invention preferably has an average of 1.8 or more epoxy groups in the molecule. Among them, when an epoxy resin having an average of 1.8 to 2.5 (about 2) epoxy groups in the molecule (bifunctional epoxy resin) is used, the plasticizing effect of the resin is large. When an bisphenol A type epoxy resin is used as an epoxy resin having an average of 1.8 to 2.5 (about 2) epoxy groups in the molecule, it becomes a cured product with good adhesive strength and the like, and bisphenol When the F type epoxy resin is used, flame retardancy is easily obtained, and when the biphenyl type epoxy resin is used, the water absorption is low and a cured product having a high Tg (glass transition temperature) is obtained. Moreover, the hardened | cured material with high Tg is obtained by using a naphthalene type epoxy resin.
（Ｂ）エポキシ樹脂として、分子内に平均して２．５〜３．９個（約３個）のエポキシ基を有するエポキシ樹脂（３官能のエポキシ樹脂）を用いた場合には、Ｔｇが更に高い硬化物が得られる。 (B) When an epoxy resin having an average of 2.5 to 3.9 (about 3) epoxy groups in the molecule (trifunctional epoxy resin) is used as the epoxy resin, Tg is further increased. A high cured product is obtained.
また、（Ｂ）エポキシ樹脂としてフェノールノボラック型エポキシ樹脂を用いた場合には、高いＴｇであり、かつ難燃性が得られ易い硬化物となる。 Further, when a phenol novolac type epoxy resin is used as the (B) epoxy resin, the cured product has a high Tg and is easy to obtain flame retardancy.
＜リン含有量＞
難燃性の観点からは、エポキシ樹脂組成物中のリン含有量が、樹脂組成物固形分全体の０．８〜５．０質量％であることが好ましく、１．０〜２．５質量％であることがより好ましい。リン含有量が、樹脂組成物固形分全体の０．８質量％未満の場合は、安定した難燃性が得られ難く、５．０質量％を超える場合は、硬化物の特性が悪化する。
ここで、リン含有量とは、エポキシ樹脂組成物中のリン原子の含有量であり、例えば、分子量６２０の物質にリン原子が１個あり、この物質を５０質量％含む配合であれば、２．５質量％のリン含有量になる（リン原子の原子量が約３１であるから、３１／６２０×０．５＝０．０２５）。
<Phosphorus content>
From the viewpoint of flame retardancy, the phosphorus content in the epoxy resin composition is preferably 0.8 to 5.0 mass% of the entire solid content of the resin composition, and preferably 1.0 to 2.5 mass%. It is more preferable that When the phosphorus content is less than 0.8% by mass of the total solid content of the resin composition, it is difficult to obtain stable flame retardancy, and when it exceeds 5.0% by mass, the properties of the cured product are deteriorated.
Here, the phosphorus content is the content of phosphorus atoms in the epoxy resin composition. For example, if a substance having a molecular weight of 620 has one phosphorus atom and contains 50% by mass of this substance, the content is 2 This results in a phosphorus content of 0.5 mass% (since the atomic weight of phosphorus atoms is about 31, 31/620 × 0.5 = 0.025).
＜その他の添加剤＞
本発明のエポキシ樹脂組成物中に、添加剤として無機充填剤やシランカップリング剤を添加してもよい。無機充填剤を添加することによって、低熱膨張率化や難燃性向上に優れる材料を得ることができる。また、シランカップリング剤を添加することによって、無機充填剤の分散性を向上させ、耐薬品性やピール強度に優れる材料を得ることができる。
<Other additives>
You may add an inorganic filler and a silane coupling agent as an additive in the epoxy resin composition of this invention. By adding an inorganic filler, it is possible to obtain a material excellent in lowering the thermal expansion coefficient and improving the flame retardancy. Further, by adding a silane coupling agent, the dispersibility of the inorganic filler can be improved, and a material excellent in chemical resistance and peel strength can be obtained.
その他、紫外線等で蛍光を発する化学物質、または樹脂を添加してもよい。このことにより、エポキシ樹脂組成物を用いて製造した多層プリント配線板の回路形成後の検査の際に、銅箔パターンをシルエット状に浮き立たせ、これによりパターン形状を認識し、外観検査が行いやすくなる。 In addition, a chemical substance that emits fluorescence by ultraviolet rays or the like, or a resin may be added. As a result, the copper foil pattern is raised in a silhouette when the multilayer printed wiring board manufactured using the epoxy resin composition is inspected after forming the circuit, thereby recognizing the pattern shape and facilitating the appearance inspection. Become.
＜エポキシ樹脂組成物の製造方法＞
本発明に係るエポキシ樹脂組成物を得る際、溶媒を用いてもよいし、無溶媒で行ってもよい。また、これらのエポキシ樹脂組成物を得る際、硬化促進剤、その他特性付与剤を必要に応じて添加してもよい。
溶媒を用いたエポキシ樹脂組成物の製造方法の一例を説明する。メチルエチルケトン等の溶媒に、（Ａ）リン含有硬化剤、（Ｂ）エポキシ樹脂、その他の硬化剤成分、リン化合物等を配合し、系が均一になるように撹拌する。この後、例えば、水酸化アルミニウムを上記溶媒によりスラリー状にしたものをフィラーとして加え、更に撹拌する。これにより、エポキシ樹脂組成物のワニスを作製することができる。
<Method for producing epoxy resin composition>
When obtaining the epoxy resin composition which concerns on this invention, you may use a solvent and may carry out without a solvent. Moreover, when obtaining these epoxy resin compositions, you may add a hardening accelerator and another characteristic provision agent as needed.
An example of a method for producing an epoxy resin composition using a solvent will be described. In a solvent such as methyl ethyl ketone, (A) a phosphorus-containing curing agent, (B) an epoxy resin, other curing agent components, a phosphorus compound, and the like are blended and stirred so that the system is uniform. Thereafter, for example, a slurry of aluminum hydroxide in the above solvent is added as a filler and further stirred. Thereby, the varnish of an epoxy resin composition can be produced.
［プリプレグ、支持体付き樹脂フィルム、金属箔張り積層板、多層プリント配線板］
本発明に係るエポキシ樹脂組成物のワニスを、コンマコータ、転写コータ、カーテンコータ、ダイコータ等を使用して銅箔、アルミ箔等の支持体に塗布し、連続、又は非連続的に加熱乾燥してＢステージ化（半硬化）し、絶縁層を形成して支持体付き樹脂フィルムを得る。前記支持体付き樹脂フィルムの金属箔厚、絶縁層樹脂厚は任意であるが、金属箔としては、８〜８０μｍ、絶縁層樹脂厚としては２０〜２００μｍが一般的である。
[Prepreg, resin film with support, metal foil-clad laminate, multilayer printed wiring board]
The varnish of the epoxy resin composition according to the present invention is applied to a support such as copper foil or aluminum foil using a comma coater, transfer coater, curtain coater, die coater, etc., and dried continuously or discontinuously. B-stage (semi-curing) is performed to form an insulating layer to obtain a resin film with a support. Although the metal foil thickness of the resin film with a support and the insulating layer resin thickness are arbitrary, the metal foil is generally 8 to 80 μm and the insulating layer resin thickness is generally 20 to 200 μm.
また、本発明に係るエポキシ樹脂組成物のワニスを、ガラスクロスやガラス不織布に塗布・含浸させ、連続又は非連続的に加熱乾燥してＢステージ化し、プリプレグを得る。このプリプレグの一方又は両方の面に金属箔（例えば、銅箔）を配し、積層し、加熱成形することによって、金属箔張り積層板が得られる。 Moreover, the varnish of the epoxy resin composition according to the present invention is applied to and impregnated into a glass cloth or a glass nonwoven fabric, and is continuously or discontinuously heated and dried to form a B stage to obtain a prepreg. A metal foil-clad laminate is obtained by placing a metal foil (for example, copper foil) on one or both sides of this prepreg, laminating, and heat forming.
金属箔張り積層板、または回路パターン形成済みの内層用基板の両面又は片面に、上記支持体付き樹脂フィルムの樹脂面をプリプレグを介して対向させて積層し、加熱成形する。更に外層に回路形成を施して多層プリント配線板が得られる。 The metal foil-clad laminate or the inner layer substrate on which the circuit pattern is formed is laminated on both sides or one side of the resin film with the support so as to face each other with a prepreg interposed therebetween, followed by heat molding. Furthermore, a multilayer printed wiring board is obtained by forming a circuit on the outer layer.
以下、実施例により本発明を具体的に説明するが、本発明はこれに限定されるものではない。
［評価方法］
＜難燃性＞
両面銅張り積層板の試験片を作製し、両面銅張り積層板の銅箔をエッチングにより取り除き、ＵＬ−９４規格に基づく垂直燃焼試験（Ｖ法）に準じて、難燃性を評価した。Ｖ−０であれば難燃性が良好とし、Ｖ−１であれば難燃性が不良とした。
EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto.
[Evaluation method]
<Flame retardance>
A test piece of a double-sided copper-clad laminate was prepared, the copper foil of the double-sided copper-clad laminate was removed by etching, and flame retardancy was evaluated according to a vertical combustion test (Method V) based on the UL-94 standard. If V-0, the flame retardancy was good, and if V-1, the flame retardance was bad.
＜はんだ耐熱性＞
両面銅張り積層板を５０ｍｍ角の試験片を作製し、この試験片を２８８℃に温めたはんだ耐熱試験機に浮かべ、膨れ等の異常が確認されるまでの時間を測定した。評価は、「○分ＯＫ」は、○分まで膨れ等の異常がないことを示し、「○分ＮＧ」は、○分で膨れ等の異常が発生したことを示す。
<Solder heat resistance>
A test piece of 50 mm square was prepared from the double-sided copper-clad laminate, and the test piece was floated on a solder heat tester heated to 288 ° C., and the time until abnormality such as swelling was confirmed was measured. In the evaluation, “◯ minute OK” indicates that there is no abnormality such as swelling up to ○ minute, and “○ minute NG” indicates that abnormality such as swelling occurs in ○ minute.
＜ガラス転移点（Ｔｇ）＞
ガラス転移点（Ｔｇ）は、ＴＭＡ（熱機械分析装置）（マックサイエンス株式会社製ＴＭＡ−４０００）を用いて昇温速度５℃／ｍｉｎの条件で測定を行った。昇温、降温を２回繰り返し、２回目の昇温の熱膨張曲線の屈曲点の温度をＴｇと定義した。
<Glass transition point (Tg)>
The glass transition point (Tg) was measured using a TMA (thermomechanical analyzer) (TMA-4000 manufactured by Mac Science Co., Ltd.) at a temperature rising rate of 5 ° C./min. The temperature increase and decrease were repeated twice, and the temperature at the inflection point of the thermal expansion curve of the second temperature increase was defined as Tg.
［製造例１〜５］
＜製造例１＞
エポキシ樹脂として、クレゾールノボラック型エポキシ樹脂（ＤＩＣ株式会社製、商品名：エピクロン Ｎ−６７３−７０Ｍ）を１４３ｇ（樹脂固形分：７０質量％（１００ｇ））、硬化剤として、クレゾールノボラック型フェノール樹脂（ＤＩＣ株式会社製、商品名：フェノライト ＫＡ−１１６３）を３５ｇ、２−フェニルイミダゾールを０．２ｇ、リン含有硬化剤として、下記化学式（１）と（１５）とで示されるリン含有フェノール樹脂（ダウケミカルカンパニー製、商品名：ＸＺ−９２７４１）を３０ｇ、リン化合物として、１，３−フェニレン−ビス−（ジ−２，６−キシレニルホスフェート）（大八化学工業株式会社製、商品名：ＰＸ２００）を５ｇ、メチルエチルケトン（ＭＥＫ）を１００ｇ配合し、樹脂が均一になるまで約１時間撹拌した。この後、フィラーとして水酸化アルミニウム（住友化学株式会社製、商品名：ＣＬ−３０３）４０ｇをメチルエチルケトンのスラリーとして加え、更に１時間撹拌した。これにより、リン含有量を１．６質量％としたエポキシ樹脂組成物ワニスが得られた。
[Production Examples 1 to 5]
<Production Example 1>
143 g (resin solid content: 70% by mass (100 g)) of a cresol novolac type epoxy resin (manufactured by DIC Corporation, trade name: Epicron N-673-70M) as an epoxy resin, and a cresol novolac type phenol resin (as a curing agent) DIC Corporation, trade name: Phenolite KA-1163) 35g, 2-phenylimidazole 0.2g, phosphorus-containing curing agent, phosphorus-containing phenol resin represented by the following chemical formulas (1) and (15) ( 30 g of Dow Chemical Company, trade name: XZ-92741), 1,3-phenylene-bis- (di-2,6-xylenyl phosphate) (trade name, manufactured by Daihachi Chemical Industry Co., Ltd.) as the phosphorus compound : PX200) 5g, methyl ethyl ketone (MEK) 100g, and until the resin is uniform And the mixture was stirred time. Thereafter, 40 g of aluminum hydroxide (trade name: CL-303, manufactured by Sumitomo Chemical Co., Ltd.) was added as a filler as a slurry of methyl ethyl ketone, and the mixture was further stirred for 1 hour. Thereby, the epoxy resin composition varnish which made phosphorus content 1.6 mass% was obtained.
（式（１５）における＊は、化学式（１）のリン原子に直接結合する部位であることを示す。）
(* In the formula (15) indicates a site directly bonded to the phosphorus atom in the chemical formula (1).)
＜製造例２＞
１，３−フェニレン−ビス−（ジ−２，６−キシレニルホスフェート）（大八化学工業株式会社製、商品名：ＰＸ２００）を使用せず、フィラーを添加しないこと以外は、製造例１と同様の手順でエポキシ樹脂組成物ワニスを作製した。
<Production Example 2>
Production Example 1 except that 1,3-phenylene-bis- (di-2,6-xylenyl phosphate) (manufactured by Daihachi Chemical Industry Co., Ltd., trade name: PX200) is not used and no filler is added. An epoxy resin composition varnish was prepared in the same procedure as described above.
＜製造例３＞
フィラーとして、ＣＬ３０３の代わりに水酸化アルミニウム（昭和電工株式会社製、商品名：ＨＰ−３６０）を添加したこと以外は製造例１と同様の手順でエポキシ樹脂組成物ワニスを作製した。
<Production Example 3>
An epoxy resin composition varnish was prepared in the same procedure as in Production Example 1 except that aluminum hydroxide (manufactured by Showa Denko KK, trade name: HP-360) was added as a filler instead of CL303.
＜製造例４＞
フィラーとして、ＣＬ３０３の代わりにベーマイト（河合石灰工業株式会社製、商品名：ＢＭＴ）を添加したこと以外は製造例１と同様の手順でエポキシ樹脂組成物ワニスを作製した。
<Production Example 4>
An epoxy resin composition varnish was prepared in the same procedure as in Production Example 1 except that boehmite (trade name: BMT, manufactured by Kawai Lime Industry Co., Ltd.) was added as a filler instead of CL303.
＜製造例５＞
フィラーとして、ＣＬ３０３の代わりに破砕シリカ（福島窯業株式会社製、商品名：Ｆ０５−３０）を添加したこと以外は製造例１と同様の手順でエポキシ樹脂組成物ワニスを作製した。
<Production Example 5>
An epoxy resin composition varnish was prepared in the same procedure as in Production Example 1 except that crushed silica (manufactured by Fukushima Ceramics Co., Ltd., trade name: F05-30) was added as a filler instead of CL303.
［製造例６〜８］
製造例６〜８では、リン含有硬化剤を合成し、合成したリン含有硬化剤を用いてエポキシ樹脂組成物ワニスを作製した。なお、リン含有硬化剤の１８０℃における溶融粘度及び軟化点は、以下の条件にて測定した。
１８０℃における溶融粘度：測定温度１８０℃において、ＡＳＴＭ Ｄ４２８７に準拠して、ＩＣＩ／コーンプレート粘度計を用いて測定される粘度
軟化点：ＪＩＳ Ｋ７２３４に準拠して、Ｂ＆Ｒ法により測定される温度
[Production Examples 6 to 8]
In Production Examples 6 to 8, a phosphorus-containing curing agent was synthesized, and an epoxy resin composition varnish was produced using the synthesized phosphorus-containing curing agent. The melt viscosity and softening point at 180 ° C. of the phosphorus-containing curing agent were measured under the following conditions.
Melt viscosity at 180 ° C .: Viscosity measured using an ICI / cone plate viscometer in accordance with ASTM D4287 at a measurement temperature of 180 ° C. Softening point: Temperature measured by the B & R method in accordance with JIS K7234
＜製造例６＞
（リン含有硬化剤の合成）
温度計、冷却管、分留管、窒素ガス導入管、撹拌機を取り付けたフラスコにフェノールノボラック樹脂１９２．４ｇ（１．８５モル）と、ｐ−アニスアルデヒド６８．０ｇ（０．５０モル）と、９，１０−ジヒドロ−９−オキサ−１０−ホスファフェナントレン−１０−オキサイド（以下 ＨＣＡと略）１０８．０ｇ（０．５０モル）とを仕込み、１８０℃まで昇温し、１８０℃で８時間反応させた。
次いで、加熱減圧下で水を除去し、下記化学式（８）で表される構造単位Ａと化学式（９）で表される構造単位Ｂとを有するフェノール樹脂（リン含有硬化剤Ｘという）３５５ｇを得た。リン含有硬化剤Ｘの軟化点を上述の方法で測定したところ、１２５℃であった。また、１８０℃における溶融粘度は、１３ｄＰａ・ｓであった。また、水酸基当量は、１９０ｇ／ｅｑ、リン含有量４．２質量％であった。
<Production Example 6>
(Synthesis of phosphorus-containing curing agent)
In a flask equipped with a thermometer, a condenser tube, a fractionating tube, a nitrogen gas inlet tube, and a stirrer, 192.4 g (1.85 mol) of phenol novolac resin and 68.0 g (0.50 mol) of p-anisaldehyde were obtained. , 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (hereinafter abbreviated as HCA) 108.0 g (0.50 mol), and the temperature was raised to 180 ° C. Reacted for hours.
Subsequently, water is removed under heating and reduced pressure, and 355 g of a phenol resin (referred to as phosphorus-containing curing agent X) having a structural unit A represented by the following chemical formula (8) and a structural unit B represented by the chemical formula (9) is added. Obtained. It was 125 degreeC when the softening point of the phosphorus containing hardening | curing agent X was measured by the above-mentioned method. The melt viscosity at 180 ° C. was 13 dPa · s. The hydroxyl group equivalent was 190 g / eq, and the phosphorus content was 4.2% by mass.
（エポキシ樹脂組成物ワニスの作製）
続いて、リン含有硬化剤Ｘをリン含有硬化剤として用いて、エポキシ樹脂組成物ワニスを作製した。
エポキシ樹脂として、クレゾールノボラック型エポキシ樹脂（ＤＩＣ株式会社、商品名：Ｎ−６７３−７０Ｍ）を１００ｇ、硬化剤として、クレゾールノボラック型フェノール樹脂（ＤＩＣ株式会社製、商品名：フェライト ＫＡ−１１６３）を２０ｇ、２−フェニルイミダゾールを０．２ｇ、リン含有硬化剤として、リン含有硬化剤Ｘを６０ｇ、リン化合物として、１，３−フェニレン−ビス−（ジ−２，６−キシレニルホスフェート）（大八化学工業株式会社製、商品名：ＰＸ２００）を２０ｇ、メチルエチルケトン（ＭＥＫ）を８０ｇ配合し、樹脂が均一になるまで約１時間撹拌した。この後、フィラーとして、水酸化アルミニウム（住友化学株式会社製、商品名：ＣＬ３０３）３０ｇをメチルエチルケトンのスラリーとして加え、更に１時間撹拌した。これにより、リン含有量を１．４質量％としたエポキシ樹脂組成物ワニスが得られた。
(Preparation of epoxy resin composition varnish)
Subsequently, an epoxy resin composition varnish was prepared using the phosphorus-containing curing agent X as a phosphorus-containing curing agent.
As an epoxy resin, 100 g of a cresol novolac type epoxy resin (DIC Corporation, trade name: N-673-70M), and as a curing agent, a cresol novolac type phenol resin (manufactured by DIC Corporation, trade name: Ferrite KA-1163) 20 g, 0.2 g of 2-phenylimidazole, as a phosphorus-containing curing agent, 60 g of a phosphorus-containing curing agent X, and 1,3-phenylene-bis- (di-2,6-xylenyl phosphate) as a phosphorus compound ( 20 g of Daihachi Chemical Industry Co., Ltd., trade name: PX200) and 80 g of methyl ethyl ketone (MEK) were blended and stirred for about 1 hour until the resin became uniform. Thereafter, 30 g of aluminum hydroxide (manufactured by Sumitomo Chemical Co., Ltd., trade name: CL303) was added as a filler as a slurry of methyl ethyl ketone, and the mixture was further stirred for 1 hour. Thereby, the epoxy resin composition varnish which made phosphorus content 1.4 mass% was obtained.
＜製造例７＞
（リン含有硬化剤の合成）
製造例６において使用したフェノールノボラック樹脂の代わりに、ビスフェノールＡノボラック樹脂３３０．４ｇ（２．８０モル）を使用した以外は、製造例６と同様にして反応を行った。下記化学式（１０）で表される構造単位Ｃと化学式（１１）で表される構造単位Ｄとを有するフェノール樹脂（リン含有硬化剤Ｙという）４９０ｇを得た。リン含有硬化剤Ｙの軟化点は、１３９℃（Ｂ＆Ｒ法）であった。また、リン含有硬化剤Ｙの溶融粘度は、６５ｄＰａ・ｓであった。また、水酸基当量は、２３２ｇ／ｅｑ、リン含有量３．１質量％であった。
<Production Example 7>
(Synthesis of phosphorus-containing curing agent)
The reaction was conducted in the same manner as in Production Example 6 except that 330.4 g (2.80 mol) of bisphenol A novolak resin was used instead of the phenol novolak resin used in Production Example 6. 490 g of a phenol resin (referred to as phosphorus-containing curing agent Y) having a structural unit C represented by the following chemical formula (10) and a structural unit D represented by the chemical formula (11) was obtained. The softening point of the phosphorus-containing curing agent Y was 139 ° C. (B & R method). The melt viscosity of the phosphorus-containing curing agent Y was 65 dPa · s. The hydroxyl group equivalent was 232 g / eq, and the phosphorus content was 3.1% by mass.
（エポキシ樹脂組成物ワニスの作製）
続いて、リン含有硬化剤Ｙをリン含有硬化剤として用いて、エポキシ樹脂組成物ワニスを作製した。
エポキシ樹脂として、クレゾールノボラック型エポキシ樹脂（ＤＩＣ株式会社、商品名：Ｎ−６７３−７０Ｍ）を１００ｇ、硬化剤として、クレゾールノボラック型フェノール樹脂（ＤＩＣ株式会社製、商品名：フェライト ＫＡ−１１６３）を２５ｇ、２−フェニルイミダゾールを０．２ｇ、リン含有硬化剤として、リン含有硬化剤Ｙを６０ｇ、リン化合物として、１，３−フェニレン−ビス−（ジ−２，６−キシレニルホスフェート）（大八化学工業株式会社製、商品名：ＰＸ２００）を２０ｇ、メチルエチルケトン（ＭＥＫ）を８０ｇ配合し、樹脂が均一になるまで約１時間撹拌した。この後、フィラーとして、水酸化アルミニウム（住友化学株式会社製、商品名：ＣＬ３０３）３０ｇをメチルエチルケトンのスラリーとして加え、更に１時間撹拌した。これにより、リン含有量を１．３質量％としたエポキシ樹脂組成物ワニスが得られた。
(Preparation of epoxy resin composition varnish)
Subsequently, an epoxy resin composition varnish was prepared using the phosphorus-containing curing agent Y as a phosphorus-containing curing agent.
As an epoxy resin, 100 g of a cresol novolac type epoxy resin (DIC Corporation, trade name: N-673-70M), and as a curing agent, a cresol novolac type phenol resin (manufactured by DIC Corporation, trade name: Ferrite KA-1163) 25 g, 0.2 g of 2-phenylimidazole, as a phosphorus-containing curing agent, 60 g of phosphorus-containing curing agent Y, and 1,3-phenylene-bis- (di-2,6-xylenyl phosphate) (as a phosphorus compound) 20 g of Daihachi Chemical Industry Co., Ltd., trade name: PX200) and 80 g of methyl ethyl ketone (MEK) were blended and stirred for about 1 hour until the resin became uniform. Thereafter, 30 g of aluminum hydroxide (manufactured by Sumitomo Chemical Co., Ltd., trade name: CL303) was added as a filler as a slurry of methyl ethyl ketone, and the mixture was further stirred for 1 hour. Thereby, the epoxy resin composition varnish which made phosphorus content 1.3 mass% was obtained.
＜製造例８＞
（リン含有硬化剤の合成）
製造例６において使用したフェノールノボラック樹脂の代わりに、フェノールアラルキル樹脂３９２．９ｇ（２．３５モル）を使用した以外は、製造例６と同様にして反応を行った。下記化学式（１２）で表される構造単位Ｅと化学式（１３）で表される構造単位Ｆとを有するフェノール樹脂（リン含有硬化剤Ｚという）５５０ｇを得た。リン含有硬化剤Ｚの軟化点は、１０２℃（Ｂ＆Ｒ法）であった。また、リン含有硬化剤Ｚの溶融粘度は、２．５ｄＰａ・ｓであった。また、水酸基当量は、２３２ｇ／ｅｑ、リン含有量２．７質量％であった。
<Production Example 8>
(Synthesis of phosphorus-containing curing agent)
The reaction was conducted in the same manner as in Production Example 6 except that 392.9 g (2.35 mol) of phenol aralkyl resin was used instead of the phenol novolak resin used in Production Example 6. 550 g of a phenol resin (referred to as phosphorus-containing curing agent Z) having a structural unit E represented by the following chemical formula (12) and a structural unit F represented by the chemical formula (13) was obtained. The softening point of the phosphorus-containing curing agent Z was 102 ° C. (B & R method). The melt viscosity of the phosphorus-containing curing agent Z was 2.5 dPa · s. The hydroxyl group equivalent was 232 g / eq, and the phosphorus content was 2.7% by mass.
（エポキシ樹脂組成物ワニスの作製）
続いて、リン含有硬化剤Ｚをリン含有硬化剤として用いて、エポキシ樹脂組成物ワニスを作製した。
エポキシ樹脂として、クレゾールノボラック型エポキシ樹脂（ＤＩＣ株式会社、商品名：Ｎ−６７３−７０Ｍ）を１００ｇ、硬化剤として、クレゾールノボラック型フェノール樹脂（ＤＩＣ株式会社製、商品名：フェライト ＫＡ−１１６３）を２５ｇ、２−フェニルイミダゾールを０．２ｇ、リン含有硬化剤として、リン含有硬化剤Ｚを６０ｇ、リン化合物として、１，３−フェニレン−ビス−（ジ−２，６−キシレニルホスフェート）（大八化学工業株式会社製、商品名：ＰＸ２００）を２０ｇ、メチルエチルケトン（ＭＥＫ）を８０ｇ配合し、樹脂が均一になるまで約１時間撹拌した。この後、フィラーとして、水酸化アルミニウム（住友化学株式会社製、商品名：ＣＬ３０３）３０ｇをメチルエチルケトンのスラリーとして加え、更に１時間撹拌した。これにより、リン含有量を１．３質量％としたエポキシ樹脂組成物ワニスが得られた。
(Preparation of epoxy resin composition varnish)
Subsequently, an epoxy resin composition varnish was prepared using the phosphorus-containing curing agent Z as a phosphorus-containing curing agent.
As an epoxy resin, 100 g of a cresol novolac type epoxy resin (DIC Corporation, trade name: N-673-70M), and as a curing agent, a cresol novolac type phenol resin (manufactured by DIC Corporation, trade name: Ferrite KA-1163) 25 g, 0.2 g of 2-phenylimidazole, as a phosphorus-containing curing agent, 60 g of a phosphorus-containing curing agent Z, and 1,3-phenylene-bis- (di-2,6-xylenyl phosphate) (as a phosphorus compound) 20 g of Daihachi Chemical Industry Co., Ltd., trade name: PX200) and 80 g of methyl ethyl ketone (MEK) were blended and stirred for about 1 hour until the resin became uniform. Thereafter, 30 g of aluminum hydroxide (manufactured by Sumitomo Chemical Co., Ltd., trade name: CL303) was added as a filler as a slurry of methyl ethyl ketone, and the mixture was further stirred for 1 hour. Thereby, the epoxy resin composition varnish which made phosphorus content 1.3 mass% was obtained.
［比較製造例１〜３］
（比較製造例１）
エポキシ樹脂として、クレゾールノボラック型エポキシ樹脂（ＤＩＣ株式会社製、商品名：エピクロン Ｎ−６７３−７０Ｍ）を１４３ｇ（樹脂固形分：７０質量％（１００ｇ））、硬化剤として、クレゾールノボラック型フェノール樹脂（ＤＩＣ株式会社製、商品名：フェノライト ＫＡ−１１６３）を３５ｇ、２−フェニルイミダゾールを０．２ｇ、リン化合物として、１，３−フェニレン−ビス−（ジ−２，６−キシレニルホスフェート）（大八化学工業株式会社製、商品名：ＰＸ２００）を４０ｇ、メチルエチルケトンを１００ｇ配合し、樹脂が均一になるまで約１時間撹拌した。この後、フィラーとして、水酸化アルミニウム（住友化学株式会社製、商品名：ＣＬ−３０３）４０ｇをメチルエチルケトンのスラリーとして加え、更に１時間撹拌した。これにより、リン含有量を１．４質量％としたエポキシ樹脂組成物ワニスが得られた。
[Comparative Production Examples 1 to 3]
(Comparative Production Example 1)
143 g (resin solid content: 70% by mass (100 g)) of a cresol novolac type epoxy resin (manufactured by DIC Corporation, trade name: Epicron N-673-70M) as an epoxy resin, and a cresol novolac type phenol resin (as a curing agent) DIC Corporation, trade name: Phenolite KA-1163) 35g, 2-phenylimidazole 0.2g, phosphorus compound, 1,3-phenylene-bis- (di-2,6-xylenyl phosphate) 40 g of Daihachi Chemical Industry Co., Ltd., trade name: PX200) and 100 g of methyl ethyl ketone were blended and stirred for about 1 hour until the resin became uniform. Thereafter, 40 g of aluminum hydroxide (manufactured by Sumitomo Chemical Co., Ltd., trade name: CL-303) was added as a filler as a slurry of methyl ethyl ketone, and the mixture was further stirred for 1 hour. Thereby, the epoxy resin composition varnish which made phosphorus content 1.4 mass% was obtained.
（比較製造例２）
エポキシ樹脂として、リン含有エポキシ樹脂（東都化成株式会社製、商品名：ＦＸ−２９８）を１００ｇ、硬化剤として、クレゾールノボラック型フェノール樹脂（ＤＩＣ株式会社製、商品名：フェノライト ＫＡ−１１６３）を３５ｇ、２−フェニルイミダゾールを０．２ｇ、リン化合物として、１，３−フェニレン−ビス−（ジ−２，６−キシレニルホスフェート）（大八化学工業株式会社製、商品名：ＰＸ２００）を５ｇ、メチルエチルケトンを１００ｇ配合し、樹脂が均一になるまで約１時間撹拌した。この後、フィラーとして、水酸化アルミニウム（住友化学株式会社製、商品名：ＣＬ−３０３）４０ｇをメチルエチルケトンのスラリーとして加え、更に１時間撹拌した。これにより、リン含有量を１．５質量％としたエポキシ樹脂組成物ワニスが得られた。
(Comparative Production Example 2)
As an epoxy resin, 100 g of a phosphorus-containing epoxy resin (manufactured by Toto Kasei Co., Ltd., trade name: FX-298) and as a curing agent, a cresol novolac type phenol resin (manufactured by DIC Corporation, trade name: Phenolite KA-1163) 35 g, 0.2 g of 2-phenylimidazole, and phosphorus compound, 1,3-phenylene-bis- (di-2,6-xylenyl phosphate) (manufactured by Daihachi Chemical Industry Co., Ltd., trade name: PX200) 5 g and 100 g of methyl ethyl ketone were blended and stirred for about 1 hour until the resin became uniform. Thereafter, 40 g of aluminum hydroxide (manufactured by Sumitomo Chemical Co., Ltd., trade name: CL-303) was added as a filler as a slurry of methyl ethyl ketone, and the mixture was further stirred for 1 hour. Thereby, the epoxy resin composition varnish which made phosphorus content 1.5 mass% was obtained.
（比較製造例３）
エポキシ樹脂として、リン含有エポキシ樹脂（東都化成株式会社製、商品名：ＦＸ−２９８）を１００ｇ、硬化剤として、クレゾールノボラック型フェノール樹脂（ＤＩＣ株式会社製、商品名：フェノライト ＫＡ−１１６３）を２０ｇ、及びジシアンジアミド（ＤＩＣＹ）を５ｇ、２−フェニルイミダゾールを０．２ｇ、リン化合物として、１，３−フェニレン−ビス−（ジ−２，６−キシレニルホスフェート）（大八化学工業株式会社製、商品名：ＰＸ２００）を５ｇ、メチルエチルケトンを７０ｇ、ジメチルホルムアミド（ＤＭＦ）を３０ｇ配合し、樹脂が均一になるまで約１時間撹拌した。この後、フィラーとして、水酸化アルミニウム（住友化学株式会社製、商品名：ＣＬ−３０３）４０ｇをメチルエチルケトンのスラリーとして加え、更に１時間撹拌した。これにより、リン含有量を１．５質量％としたエポキシ樹脂組成物ワニスが得られた。
(Comparative Production Example 3)
As an epoxy resin, 100 g of a phosphorus-containing epoxy resin (manufactured by Toto Kasei Co., Ltd., trade name: FX-298) and as a curing agent, a cresol novolac type phenol resin (manufactured by DIC Corporation, trade name: Phenolite KA-1163) 20 g, 5 g of dicyandiamide (DICY), 0.2 g of 2-phenylimidazole, and phosphorus compound, 1,3-phenylene-bis- (di-2,6-xylenyl phosphate) (Dahachi Chemical Industry Co., Ltd.) (Product name: PX200) 5 g, methyl ethyl ketone 70 g, and dimethylformamide (DMF) 30 g were mixed and stirred for about 1 hour until the resin became uniform. Thereafter, 40 g of aluminum hydroxide (manufactured by Sumitomo Chemical Co., Ltd., trade name: CL-303) was added as a filler as a slurry of methyl ethyl ketone, followed by further stirring for 1 hour. Thereby, the epoxy resin composition varnish which made phosphorus content 1.5 mass% was obtained.
表１に製造例１〜５、比較製造例１〜３のエポキシ樹脂組成物ワニスの配合表を示す。表２に製造例６〜８のエポキシ樹脂ワニスの配合表を示す。 Table 1 shows a recipe for the epoxy resin composition varnishes of Production Examples 1 to 5 and Comparative Production Examples 1 to 3. Table 2 shows a recipe for the epoxy resin varnishes of Production Examples 6-8.
［プリプレグ及び銅張り積層板の作製］
＜実施例１〜５＞
製造例１〜５で作製したエポキシ樹脂組成物ワニスを厚さ：０．２ｍｍのガラス布（旭シュエーベル株式会社製、商品名：７６２９）に含浸後、１２０℃、２０分間加熱、乾燥しプリプレグを得た。
プリプレグの両側に、厚さ：１８μｍの電解銅箔：Ｆ２−ＷＳ−１８（古河電気工業株式会社製、商品名）を接着面がプリプレグと合わさるように重ね、１８０℃、３０分間、４ＭＰａの真空プレス条件で両面銅張り積層板を作製した。
＜実施例６〜８＞
製造例６〜８で作製したエポキシ樹脂組成物ワニスを用いて、上述と同様の方法によりプリプレグを得た。また、両面銅張り積層板を作製した。
＜比較例１〜３＞
比較製造例１〜３で作製したエポキシ樹脂組成物ワニスを用いて、上述と同様の方法によりプリプレグを得た。また、両面銅張り積層板を作製した。
[Preparation of prepreg and copper-clad laminate]
<Examples 1-5>
After impregnating the epoxy resin composition varnish produced in Production Examples 1 to 5 into a glass cloth having a thickness of 0.2 mm (trade name: 7629, manufactured by Asahi Sebel Co., Ltd.), heating and drying at 120 ° C. for 20 minutes to dry the prepreg Obtained.
On both sides of the prepreg, an electrolytic copper foil having a thickness of 18 μm: F2-WS-18 (made by Furukawa Electric Co., Ltd., trade name) is stacked so that the adhesive surface is aligned with the prepreg, and a vacuum of 4 MPa at 180 ° C. for 30 minutes. A double-sided copper-clad laminate was produced under the pressing conditions.
<Examples 6 to 8>
Using the epoxy resin composition varnishes produced in Production Examples 6 to 8, prepregs were obtained by the same method as described above. Moreover, the double-sided copper clad laminated board was produced.
<Comparative Examples 1-3>
Using the epoxy resin composition varnish produced in Comparative Production Examples 1 to 3, a prepreg was obtained by the same method as described above. Moreover, the double-sided copper clad laminated board was produced.
［結果］
上記方法にて得られた結果を表３に示した。
[result]
The results obtained by the above method are shown in Table 3.
上記化学式（１）で示されるリン含有硬化剤を用いた実施例１〜８の積層板は、難燃性を有し、耐熱性が高く、また、Ｔｇが高いことが判った。また、従来の潜在性硬化剤であるジシアンジアミド（ＤＩＣＹ）を用いた比較例３と比較して、実施例１〜８の積層板は、十分な反応性を示す。また、はんだ耐熱性に優れ、Ｔｇも高く耐熱性に優れることが判った。
実施例１〜８では、従来の硬化剤であるジシアンジアミド（ＤＩＣＹ）を用いた場合と比べて、ジシアンジアミド（ＤＩＣＹ）を溶解させるために、沸点が高く吸湿性のあるジメチルホルムアミド（ＤＭＦ）を用いなくても、リン含有硬化剤を汎用溶媒であるメチルエチルケトン（ＭＥＫ）に溶解させることができる。一方、上記化学式（１）で示されるリン含有硬化剤を用いない比較例１〜３は、はんだ耐熱性に劣り、Ｔｇが低く耐熱性に劣る。
It turned out that the laminated board of Examples 1-8 using the phosphorus containing hardening | curing agent shown by the said Chemical formula (1) has a flame retardance, high heat resistance, and high Tg. Moreover, the laminated board of Examples 1-8 shows sufficient reactivity compared with the comparative example 3 using the dicyandiamide (DICY) which is a conventional latent hardening | curing agent. Moreover, it was found that the solder was excellent in heat resistance, Tg was high, and heat resistance was excellent.
In Examples 1 to 8, as compared with the case where dicyandiamide (DICY), which is a conventional curing agent, was used, dimethylformamide (DMF) having a high boiling point and high hygroscopicity was not used to dissolve dicyandiamide (DICY). However, the phosphorus-containing curing agent can be dissolved in methyl ethyl ketone (MEK), which is a general-purpose solvent. On the other hand, Comparative Examples 1 to 3 that do not use the phosphorus-containing curing agent represented by the chemical formula (1) are inferior in solder heat resistance, and have low Tg and inferior heat resistance.
Claims (6)
該（Ａ）リン含有硬化剤は、下記化学式（８）で表される構造単位Ａと化学式（９）で表される構造単位Ｂとを有する樹脂、下記化学式（１０）で表される構造単位Ｃと化学式（１１）で表される構造単位Ｄとを有する樹脂、及び下記化学式（１２）で表される構造単位Ｅと化学式（１３）で表される構造単位Ｆとを有する樹脂から選ばれるものであり、
エポキシ樹脂組成物中のリン含有量が、樹脂組成物固形分全体の０．８〜１．４質量％である、エポキシ樹脂組成物。
The (A) phosphorus-containing curing agent is a resin having a structural unit A represented by the following chemical formula (8) and a structural unit B represented by the chemical formula (9), a structural unit represented by the following chemical formula (10) C and a resin having a structural unit D represented by the chemical formula (11) and a resin having a structural unit E represented by the following chemical formula (12) and a structural unit F represented by the chemical formula (13). Is,
The epoxy resin composition whose phosphorus content in an epoxy resin composition is 0.8-1.4 mass % of the resin composition whole solid content.
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