BIODEGRADABLE POLYMERS

USPTO Patent Application US 2018/0071438 A1
Application Date: Mar. 15th, 2018

ABSTRACT

Provided herein is a composition comprising a poly(alpha-hydroxycarboxylic acid) substantially free of acidic impurities wherein the poly(alpha-hydroxycarboxylic acid) is selected from poly(D,L-lactic-co-glycolic acid), poly(L-lactic acid), poly(D-lactic acid) and poly(D,L-lactic acid)....
Assignee(s):
Application Number:
15/812,030
International Classification:
A61L 31/10 (20060101); A61K 31/435 (20060101); C09D 5/03 (20060101); B05D 3/12 (20060101); C08G 63/06 (20060101); A61L 31/14 (20060101); C09D 167/04 (20060101); C08L 67/04 (20060101); C08J 7/04 (20060101); C08G 63/90 (20060101); C08G 63/08 (20060101); A61L 31/16 (20060101)
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CLAIMS

What is claimed is:

1. A method for the preparation of a composition comprising poly(D,L-lactic-co-glycolic acid) substantially free of acidic impurities, said method comprising: contacting poly(D,L-lactic-co-glycolic acid) containing acidic impurties with a solid base;forming a salt of the acidic impurity; andseparating the poly(D,L-lactic-co-glycolic acid) from the salt of the acidic impurity.

DESCRIPTION

CROSS REFERENCE

This application is a Divisional of U.S. patent application Ser. No. 15/341,160, filed on Nov. 2, 2016, which is a Continuation of U.S. patent application Ser. No. 12/729,603, filed on Mar. 23, 2010, the disclosures of which is incorporated herein by reference, which claims the benefit of U.S. Provisional Application...
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