Copolymers based on aliphatic polycarbonates and lactams

摘要

Anionic copolymers of lactams and aliphatic polycarbonates having urethane and carboxylic acid ester groups, preferably having recurring structural units of the formula: -NH-CO-O-Y-O-CO-(CR2)n- wherein R represents hydrogen or C1-C4-alkyl; n represents an integer of from 2 to 13; Y represents the residue of an alcohol of the following formula: HO-X-OH, wherein X represents an open-chain, cyclic or mixed open-chain-cyclic alkylene radical having from 2 to 12 carbon atoms which is optionally substituted by C1-C4-alkyl and optionally interrupted by from 1 to 3 oxygen atoms, or a polyethylene glycol having a molecular weight up to 10,000 or an alkoxylation product of bifunctional phenols.