Silicon-containing copolyester and method of producing same.

摘要

A silicon-containing copolyester in the form of a block copolymer consists of 1 SIMILAR 99% by weight of a siloxane segment expressed by the following general formula (A) and 99 SIMILAR 1% by weight of a polyester segment expressed by the following general formula (B), wherein the polymerization degree of the siloxane segment is 1 SIMILAR 2000 and the polymerization degree of the polyester segment is 1 SIMILAR 1000: <CHEM> (in which m represents a value of 1 SIMILAR 2000) <CHEM> (in which R1 represents one or more kinds of radicals selected from aromatic bivalent radicals having 6 SIMILAR 12 carbon atoms or aliphatic bivalent radicals having 4 SIMILAR 20 carbon atoms, R2 represents one or more kinds of radicals selected from aromatic bivalent radicals having 6 SIMILAR 20 carbon atoms or aliphatic bivalent radicals having 2 SIMILAR 20 carbon atoms, and n represents a value of 1 SIMILAR 1000).