Patent ID: 6905768
Filing Date: 2005-06-14
Classification: C08G,C08K,C08L,H01L,Y10T

Abstract:
1. An epoxy resin composition comprising, as essential components, (A) an epoxy resin, (B) a phenolic hydroxyl group-containing compound, (C) a crosslinked phenoxyphosphazene compound, and (D) an inorganic filler, the crosslinked phenoxyphosphazene compound being a crosslinked phenoxyphosphazene compound in which at least one phosphazene compound selected from the group consisting of a cyclic phenoxyphosphazene represented by the formula (1) (wherein m is an integer of 3 to 25 and Ph is a phenyl group) and a linear phenoxyphosphazene represented by the formula (2) (wherein X (wherein Z is —C(CH 3 ) 2 —, —SO 2 —, —S— or —O— and a is 0 or 1); (a) each of the crosslinking groups is interposed between the two oxygen atoms left after the elimination of phenyl groups from the phosphazene compound; (b) the amount of the phenyl groups in the crosslinked compound is 50 to 99.9% based on the total amount of the phenyl groups in said phosphazene compound represented by the formula (1) and/or said phosphazene compound represented by the formula (2); and (c) the crosslinked phenoxyphosphazene compound has no free hydroxyl group in the molecule, the amount of component (C) being in the range of 0.01 to 30 wt. % based on the total amount of components (A), (B) and (C), and the amount of component (D) being in the range of 60 to 98 wt. % based on the total amount of components (A), (B), (C) and (D).