申请人:Takasago International Corporation
公开号:EP0640637A1
公开(公告)日:1995-03-01
A biodegradable optically active copolymer has the general formula (I):
wherein R¹, R², R³ and R⁴ each represent a hydrogen atom or a methyl group; m and n are each a natural number of which the sum is from 10 to 5,000; and C* is an asymmetric carbon atom. The copolymer (I) is produced by ring-opening copolymerization of optically active β-butyrolactone with a cyclic carbonate in the present of e.g. a tin-, aluminum- or zinc-based, preferably a distannoxane catalyst. The copolymer (I) has excellent biodegradability (enzyme degradability) and hydrolyzability.
一种可生物降解的光学活性共聚物具有通式 (I):
其中 R¹、R²、R³ 和 R⁴ 分别代表氢原子或甲基;m 和 n 分别为自然数,其总和为 10 至 5000;C* 为不对称碳原子。共聚物(I)是通过光学活性β-丁内酯与环状碳酸酯在锡基、铝基或锌基催化剂,最好是二烷氧基催化剂的作用下开环共聚而制得的。共聚物(I)具有优异的生物降解性(酶降解性)和水解性。