The invention provides poly(α-hydroxy-carboxylic acid)/poly(oxyalkylene) polymers selected from multiblock polymers of the following repeating unit I
wherein R is an alkylene group, R₁ is hydrogen or methyl groups, m is a positive integer, and a and b are zero or positive integers, the case where a and b are simultaneously zero being excluded, and chain extended multiblock polymers which polymers are bioabsorbable and biodegradable, these polymeric materials being derived from reacting diols in the form of polyether glycols with α-hydroxy-carboxylic acids. The invention also provides methods for the preparation of such polymeric materials and bioabsorbable surgical articles made therefrom.
本发明提供的聚(α-羟基-
羧酸)/聚(氧亚烷基)聚合物选自以下重复单元 I 的多嵌段聚合物
其中 R 为亚烷基,R₁ 为氢或甲基,m 为正整数,a 和 b 为零或正整数,不包括 a 和 b 同时为零的情况;以及链延伸多嵌段聚合物,这些聚合物具有
生物可吸收性和
生物可降解性,这些聚合物材料由聚醚二醇形式的二醇与α-羟基
羧酸反应而得。本发明还提供了制备这种聚合材料和由其制成的
生物可吸收外科用品的方法。