Polymerization process and product

Details Polymerization process and product Polymerization process and product

C - Chemistry, Metallurgy

08

G

402/314

C08G 63/08 (2006.01) A61K 47/34 (2006.01) C08G 63/06 (2006.01) C08G 63/82 (2006.01)

Patent

CA 1185048

-1- Abstract of the Disclosure Lactic-glycolic copolymers having weight average molecular weights of about 6000 to about 35000 are prepared by condensation of lactic acid and glycolic acid in the presence of readily removable strong acid ion-exchange resins. The invention provides a polymerization process which permits the substantially total removal from the copolymer of polymerization catalysts, so that the copolymers so produced can be utilized as drug delivery systems, thereby permitting the complete biodegradation of the system with no residual toxic foreign substances remaining in animal tissues.

360018

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