Patent ID: 6211326
Filing Date: 2001-04-03
Classification: C08G,C09D,H01B

Abstract:
A process for preparing hydroxyl- and carboxyl-containing polyesterimide resins comprising as monomeric components(A) one or more imide-forming compounds comprising(i) at least one group selected from the group consisting of primary amino groups, isocyanate groups, and mixtures thereof, and(ii) at least one further functional group selected from the group consisting of primary amino groups, isocyanate groups, hydroxyl groups, carboxyl groups, carboxylic anhydride groups, and mixtures thereof;(B) one or more members selected from the group consisting of polycarboxylic acids, anhydrides of polycarboxylic acids, esters of polycarboxylic acids, and mixtures thereof; and(C) polyols;the process comprising:(I) reacting component (A) with part of component (B) to form a polyimide,(II) reacting the polyimide with component (C) to form a polyesterimide, and(III) reacting the polyesterimide with the remaining part of component (B) to form a hydroxyl- and carboxyl-containing polyesterimide.