Biodegradable high-molecular polymers, production and use thereo

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

1994-07-05

1996-12-17

Mullis, Jeffrey

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

528499, C08G 6308

Patent

active

055854605

ABSTRACT:
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.

REFERENCES:
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patent: 4728721 (1988-03-01), Yamamoto et al.
patent: 4810775 (1989-03-01), Bendix et al.
patent: 4853224 (1989-08-01), Wong
patent: 5041529 (1991-08-01), Shinoda et al.
patent: 5182258 (1993-01-01), Chiou

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