Patent ID: 7683153

Claim:
A modified epoxy resin composition comprising: a modified epoxy resin having been prepared by heating an epoxy resin with an epoxy reactive modifier at a temperature of about 120 degrees C. for 1 hour, the epoxy reactive modifier having been prepared by heating two moles of ethyleneurea with a methyl ester of a dibasic acid and a basic catalyst to about 150-170 degrees C., the composition further comprising an amine curing catalyst and a blocking agent which is an isophthaloylbis(ethyleneurea) which is the same or different from the epoxy reactive modifier, the function of which, when mixed with the curing catalyst, is to inhibit curing of the epoxy resin composition at 20 degrees C. and to accelerate curing at a cure temperature at or about 80 degrees C.