C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/314
C08G 63/06 (2006.01) A61K 9/16 (2006.01) A61L 17/00 (2006.01)
Patent
CA 1236641
Abstract of the Disclosure A copolymer of lactic acid and glycolic acid which has a weight-average molecular weight of not less than about 5000 and a dispersity of about 1.5 to 2 is advantageously used as a biode- gradable polymer for medical preparation. According to the invent- ion there is provided a method for producing a copolymer of lactic acid and glycolic acid, the copolymer having a weight-average molecular weight of not less than about 5,000 and a dispersity of about 1.5 to 2, which comprises subjecting lactic acid and glycolic acid or a low molecular polymer or copolymer thereof to a poly- condensation reaction under heating and reduced pressure in the absence of a catalyst.
486283
Miyagawa Tsutomu
Ogawa Yasuaki
Tanaka Motoaki
Watanabe Toshio
Fetherstonhaugh & Co.
Takeda Chemical Industries Ltd.
Wako Pure Chemical Industries Ltd.
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