Polyepoxide resins incorporating epoxy terminated urethanes as tougheners

摘要

This invention relates to improved one part polyepoxide resins which are tough and have enhanced flexible and elastic properties. The polyepoxide resins comprise a polyepoxide resin based on a polyglycidyl ether of a phenol, an oxazolidone toughener and a latent amine curative. The improvement in the polyepoxide resin formulation comprises incorporating an oxazolidone toughener represented by the formula: wherein R is the residue of an aliphatic glycol or aliphatic ether glycol having from 2 to 20 carbon atoms.