POLY(ESTER-URETHANE), PRODUCTION METHOD THEREFOR, CYCLIC (ESTER-URETHANE)OLIGOMER, AND PRODUCTION METHOD THEREFOR

摘要

PPROBLEM TO BE SOLVED: To provide a biodegradable and chemically recyclable poly(ester-urethane) and to provide a method for producing the poly(ester-urethane) by a low environmental load process. PSOLUTION: What is provided is: a poly(ester-urethane) comprising repeating units each represented by formula (1) (wherein x is an integer of 2 to 10; y is 2 or 3; and z is an integer of 2 to 6); a method for producing the poly(ester-urethane) comprising polymerizing a diurethanediol with a dialkyl dicarboxylate in the presence of a hydrolase in an organic solvent; a cyclic (ester-urethane) oligomer represented by formula (4) (wherein m is an integer of 1 to 8); a method for producing a poly(ester-urethane) comprising polymerizing the oligomer; and a method for producing the oligomer comprising depolymerizing the poly(ester-urethane). PCOPYRIGHT: (C)2006,JPO&NCIPI