Modified oxazolidone-urethane polymers

摘要

An isocyanate-reactive prepolymer contg. at least one terminal epoxide gp. with an associated sec. OH gp. and modified by a grapted polymeric segment (I). (I) is derived from an ethylenically unsatd. monomer. A thermoset compsn. (II) comprising a polymer backbone contg. oxazolidone linkages (III) and side chains contg. urethane linkages, and modified by a polymeric segment (IV) grafted to the polymer backbone. (II) is free of isocyanate linkages. The linkages (III) are separated by ester linkages. (IV) is derived from an ethylenically unsatd. monomer.