Patent ID: 8153260
Filing Date: 2012-04-10
Classification: B32B,C08G,H05K,Y10T

Abstract:
1. A laminated composite material, comprising: (A) a layer formed from an epoxy resin curing composition; and (B) a layer of a polyimide, wherein the epoxy resin curing composition comprises: 10% to 80% by weight, based on the overall weight of the composition, of an epoxy resin; 5% to 90% by weight, based on the overall weight of the composition, of a curing agent; and 10% to 15% by weight, based on the overall weight of the composition, of spherical silica; and wherein the curing agent is composed of an imidazole compound and a polyamide compound having a repeat unit comprising a phenolic hydroxyl group containing structure represented by the following general formula (I) or (II): wherein ring A represents a phenylene group or a naphthylene group, each of which may be substituted with a halogen atom, a hydroxyl group or an alkyl group having 1 to 4 carbon atoms, and R represents a phenylene group or a naphthylene group, each of which may be substituted with a halogen atom, a hydroxyl group or an alkyl group having 1 to 4 carbon atoms; wherein ring B represents an arylene group having 6 to 18 carbon atoms or an alkylidenediarylene group having 13 to 25 carbon atoms, each of which may be substituted with a halogen atom, a hydroxyl group or an alkyl group having 1 to 4 carbon atoms; wherein the imidazole compound is provided in an amount ranging from 0.1% to 10% by weight, based on the total weight of the curing agent; wherein the epoxy resin is selected from the group consisting of: a 1,6-naphthalene epoxy resin represented by the following formula: a 4,4′-biphenyl enoxy resin represented by the following formula: an alicyclic dicyclopentadiene epoxy resin represented by the following formula: wherein the spherical silica has an average particle size of 0.1 to 2.0 μm; and wherein the epoxy resin and the curing agent are provided in amounts such that the molar ratio of epoxy groups in the epoxy resin to co-reactive functional groups in the curing agent ranges from 0.9/1.0 to 1.0/0.9.