Patent ID: 6524709
Filing Date: 2003-02-25
Classification: C08G,H01L,H05K,Y10T

Abstract:
A phosphorus containing epoxy resin composition comprising: a phosphorus containing epoxy resin which is the reaction product of an epoxy based resin and a phosphorus containing organic compound; wherein said epoxy based resin comprises a novolac type epoxy resin, said novolac type epoxy resin is present in a quantity of 20 wt % or more of the total weight of epoxy based resin and phosphorus containing organic compound; wherein said phosphorus containing organic compound comprises an active hydrogen atom, said phosphorus containing organic compound comprises the reaction product of a quinone compound and an organic phosphorus compound (b) having one active hydrogen atom bonded to the phosphorus atom, said reaction product formed with a molar ratio of said quinone compound to (b) is greater than 0 and less than 1.