Polyesterpolyol derivative and a poly(urethane)ureamide obtained therefrom

Abstract

A polymer comprising a poly(urethane)ureamide is prepared by a reaction of a polyisocyanate and a polyesterpolyol derivative of the formula [I] ##STR1## 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 ##STR2## group in the main chain, n is an integer of 2.ltoreq.n.ltoreq.4, x is an average value and a number of 0.ltoreq.x.ltoreq.(n-1), --NH-- group of ##STR3## 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 ##STR4## 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.

Dependencies are inferred from the claim text.