Phenolic resin, method for producing the resin and epoxy resin c

Details Phenolic resin, method for producing the resin and epoxy resin c Phenolic resin, method for producing the resin and epoxy resin c

1993-02-16

1994-09-06

Bleutge, John C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525529, 528 87, 528 97, 528101, 528104, 528205, C08F28300

Patent

active

053448995

ABSTRACT:
A phenolic resin is represented by the formula (1) ##STR1## wherein R.sup.1 denotes a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, m denotes an integer of from 0 to 10 and n denotes 0, 1 or 2. A method for producing the phenolic resin involves reacting in the presence of an acid catalyst 3a,4,7,7a-tetrahydroindene and a phenol represented by the formula (2) ##STR2## wherein R.sup.1 denotes a hydrogen atom or an alkyl group having 1 to 4 carbon atoms and n denotes 0, 1 or 2. An epoxy resin composition for encapsulation contains: (a) a curable epoxy resin, (b) the above phenolic resin, (c) a curing promotor, and (d) an inorganic filler.

REFERENCES:
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patent: 4390680 (1983-06-01), Nelson
patent: 4394497 (1983-07-01), Nelson et al.
patent: 4440914 (1984-04-01), Helfand et al.
patent: 4707526 (1987-11-01), Sasaki et al.
patent: 4927905 (1990-05-01), Bogan
patent: 5137940 (1992-08-01), Tomiyoshi et al.

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