Polyesterpolyol derivative and a poly(urethane)ureamide obtained therefrom

摘要

A polymer comprising a poly(urethane)ureamide is prepared by a reaction of a polyisocyanate and a polyesterpolyol derivative of the formula [I] [I] wherein A is an n-valaent radical obtained by removal of terminal hydrogen atoms from an n-valaent polyester-polyol having a molecular weight of 400 to 10,000 and containing group in the main chain, n is an integer of 2 in the main chain forms an amido group connected with a carbonyl group of an aminobenzoic acid and/or a carbonyl group of a polybasic acid component of the polyesterpolyol and, -CO- group of in the main chain forms an ester group or amido group. The polymer has higher heat resistance and greater mechanical strength as compared to corresponding polyester-urethanes.