MODIFIED POLYESTER COMPOSITION AND PREPARATION PROCESS AND USE THEREOF

摘要

In preparing bioabsorbable polyesters containing glycolic acid unit and/or lactic acid unit by the polymerization of glycolide and/or lactide, compositions comprising polyester-silicone copolymers obtained by conducting polymerization in the presence of silicones and the effect of merely mixing the above bioabsorbable polyesters with certain kind of silicones upon the modification, thereby attaining flexibility in particular, of the bioabsorbable polyesters, are disclosed. For example, lactide, glycolide and a silicone of formula and M.W, 41,300 were polymerised together. Test tubes coated internally with the polymer maintained the flowability of blood some 2-4 times more than uncoated tubes.