Patent ID: 7893189

Claim:
A poly(ether-ester) comprising the transesterification product of (1) monocarboxylic or polycarboxylic acid esters with one or more bound polyether chains which are the ring opening reaction products of: a) one or more monocarboxylic or polycarboxylic acid esters containing one or more hydroxyl groups and having the general formula wherein: R represents a monovalent aryl, alkyl, aralkyl, alkenyl or alkynyl radical, R′ represents an at least divalent aryl, alkyl, aralkyl, alkenyl or alkynyl radical, wherein: m=1 and n=1, m≧2 and n=1, or n≧2 and m=1; with b) alkylene oxides; and, optionally, in the presence of c) one or more diols and/or polyols, and, optionally, d) one or more dicarboxylic acid esters; and (2) a component selected from the group consisting of: (a) one or more diols and/or polyols; (b) diols, and dicarboxylic acids or dicarboxylic acid derivatives; (c) diols, or polyols and monocarboxylic acid esters, or monocarboxylic acids containing one or more hydroxyl groups; and (d) monocarboxylic or polycarboxylic acid esters, which may contain a free hydroxyl group; wherein (a), (b) and (c) yield an OH-functional poly(ether-ester) and (d) yields a poly(ether-ester) having ester terminal groups.