Patent ID: 6469109
Filing Date: 2002-10-22
Classification: C07C,C07D,C08G,H01L,H01P,H05K,Y10T

Abstract:
An epoxy resin composition comprising as the essential components:(A) an epoxy resin; (B) an aryl ester compound composed of a polyhydric phenol in which at least one OH group has been esterified with an organic acid having an acetyl group or an aromatic ring free acyl group and having 1 to 20 carbon atoms, said polyhydric phenol being a condensation product of a phenolic compound represented by the general formula (4): â€ƒwherein each P represents independently a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms, an aryl group having 6 to 20 carbon atoms or an aralkyl group having 7 to 20 carbon atoms and i represents an integer of 0 to 2, and Q represents a hydrogen atom or a hydroxyl group, with a carbonyl compound represented by the general formula (2): â€ƒwherein each of X and Xâ€² represents independently a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms, an aryl group having 6 to 20 carbon atoms or an aralkyl group having 7 to 20 carbon atoms, provided that X and Xâ€² may form a ring together with the carbon atom to which X and Xâ€² are attached, said condensation being conducted in the presence of an acid catalyst; and (C) a cure accelerator, wherein in the aryl ester compound (B) the esterfication percentage is at least 30 equivalent % relative to the total OH groups.