Patent ID: 6534193
Filing Date: 2003-03-18
Classification: C08L,H01L,Y10T

Abstract:
A liquid epoxy resin composition comprising(A) a liquid epoxy resin, (C) a microencapsulated catalyst containing an imidazole compound or an organophosphorus compound of both, having an average particle size of 0.5 to 15 &mgr;m, and having a catalyst dissolution from the microcapsules into o-cresol, as measured at 30Â° C. over a period of 15 minutes, which corresponds to at least 70% by weight of the total amount of catalyst in the microcapsules, (D) an inorganic filler, and (E) 0.1 to 20 parts by weight of an indene polymer per 100 parts by weight of the liquid epoxy resin (A), the indene polymer being a copolymer of indene and styrene or a ternary copolymer of indene, cumarone, and styrene or both, having a number average molecular weight of 200 to 2,000, the indene polymer (E) being previously melt mixed with a part of all of the liquid epoxy resin (A) prior to compounding with the remaining components.