Preparation process of dl-lactic acid-glycolic acid-copolymer

Details Preparation process of dl-lactic acid-glycolic acid-copolymer Preparation process of dl-lactic acid-glycolic acid-copolymer

C - Chemistry, Metallurgy

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C08G 63/08 (2006.01) A61K 9/20 (2006.01) A61K 9/22 (2006.01) C08G 63/82 (2006.01)

Patent

CA 1306830

ABSTRACT A process for copolymerizing lactide and glycolide by using a specific amount of stannous octoate as a catalyst in the presence of a polymerization regulator at temperature of 200-230°C to prepare dl- lactic acid-glycolic acid-copolymers which contain 50-60 mol % of a dl-lactic acid unit and 40-50 mol % of a glycolic acid unit and have inherent viscosity of 0.4-0.6 in chloroform.

571615

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