Biodegradable high-molecular polymers, production and use...

Details Biodegradable high-molecular polymers, production and use... Biodegradable high-molecular polymers, production and use...

C - Chemistry, Metallurgy

08

G

167/163, 402/186

C08G 63/90 (2006.01) A61K 9/16 (2006.01) A61K 9/50 (2006.01) A61K 47/34 (2006.01)

Patent

CA 2040141

The invention provides a method of purifying biodegradable aliphatic polyesters which comprises dissolving, in a readily water-soluble organic solvent, a biodegradable aliphatic polyester which contains low- molecular substances and adding water to the resulting solution to thereby remove said low-molecular substances, biodegradable aliphatic polyesters obtained by said method and containing low-molecular substances with a molecular weight of 1,000 or less in an amount of not higher than 3%, and drug-containing compositions which comprise any of said biodegradable polyesters.

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