Patent ID: 6472502
Filing Date: 2002-10-29
Classification: A61K,A61L,A61Q,C08G

Abstract:
A flexible, transparent copolylactide comprising polymerized units of racemic lactide and a comonomer of &egr;-caprolactone, said copolylactide having a glass transition temperature of33Â° to 37Â° C. and a polydispersity Pn of 1.4 to 1.7, obtained by polymerizing racemic lactide with said &egr;-caprolactone comonomer at a temperature not exceeding 168Â° C., at a molar ratio of lactide to comonomer of 84:16, 85:15 or 86:14, in the presence of tin(II) di(ethylhexanoate) as an initiator, at a molar ratio of initiator to lactide/comonomer of 1:30,000 to 1:50,000, and in the presence of an n-alkanol cocatalyst, at a molar ratio of cocatalyst to lactide/comonomer of 1:200 to 1:600.