Claims
- 1. An epoxy resin composition comprising
- (A) a novolak resin prepared by condensing formalin and a phenol compound represented by the general formula (I): ##STR3## wherein R.sup.1 is an alkyl radical having 4 to 12 carbon atoms and n is an integer of from 1 to 5; and
- (B) an epoxy resin prepared by glycidylating a novolak resin (A) with an epihalohydrin.
- 2. The epoxy resin composition according to claim 1 wherein said novolak resin (A) is a novolak resin prepared by condensing said formalin and said phenol compound at a formalin/phenol compound molar ratio of from 0.2 to 1.05.
- 3. The epoxy resin composition according to claim 1 wherein said novolak resin (A) is a novolak resin prepared by condensing said formalin and said phenol compound in the presence of p-toluenesulfonic acid as a catalyst.
- 4. The epoxy resin composition according to claim 1 wherein said novolak resin (A) has a number average molecular weight of from 400 to 1,800.
- 5. The epoxy resin composition according to claim 1 wherein said novolak resin (A) used in the preparation of the epoxy resin (B) by glycidylation with the epihalohydrin has a number average molecular weight of from 400 to 1,600.
- 6. The epoxy resin composition according to claim 1 wherein said epoxy resin (B) has an epoxy equivalent of up to 800 g/eq.
- 7. The epoxy resin composition according to claim 1 wherein said epoxy resin composition contains the novolak resin (A) and the epoxy resin (B) at a ratio R represented by the formula (1): ##EQU2## of from 0.9 to 1.05.
Parent Case Info
This application is a continuation of application Ser. No. 08/231,304, filed Apr. 22, 1994 which is now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (6)
Number |
Date |
Country |
2238727 |
Feb 1975 |
FRX |
2299359 |
Aug 1976 |
FRX |
52-45630 |
Apr 1977 |
JPX |
60-88079 |
May 1985 |
JPX |
6314820 |
Jan 1991 |
JPX |
2265374 |
Sep 1993 |
GBX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
231304 |
Apr 1994 |
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