Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1995-12-01
1998-03-24
Wilson, Donald R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
525481, 528 98, 528104, 528117, C08L 6108, C08L 6304, C08G 5956
Patent
active
057313709
ABSTRACT:
A epoxy resin composition comprising (A) an epoxy resin bearing at least one monovalent hydrocarbon group on a benzene ring, (B) a phenolic resin, (C) an inorganic filler, and (D) 2-phenyl-4,5-dihydroxymethylimidazole as a curing accelerator has a low melt viscosity, a long gel time and a high curing rate, and provides cured products having improved properties. Semiconductor devices encapsulated with cured products of the inventive composition are reliable.
REFERENCES:
patent: 4859722 (1989-08-01), Shiobara et al.
patent: 4942190 (1990-07-01), Murayama et al.
patent: 5001174 (1991-03-01), Yanagisawa et al.
patent: 5248710 (1993-09-01), Shiobara et al.
patent: 5346743 (1994-09-01), Uchida et al.
Arai Kazuhiro
Dobashi Kazuo
Ikeda Tadaharu
Shiobara Toshio
Shin-Etsu Chemical Co. , Ltd.
Wilson Donald R.
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