Enzymatic depolymerization process of polylactic acid, and...

Details Enzymatic depolymerization process of polylactic acid, and... Enzymatic depolymerization process of polylactic acid, and...

2008-07-08

2008-07-08

Lilling, Herbert J (Department: 1657)

Chemistry: molecular biology and microbiology

Micro-organism, tissue cell culture or enzyme using process...

Preparing oxygen-containing organic compound

C435S123000, C435S124000, C435S125000, C435S126000, C435S195000, C435S196000, C435S198000

Reexamination Certificate

active

10523688

ABSTRACT:
A depolymerizing process of polylactic acid, wherein the polylactic acid is depolymerized in the presence of a hydrolase in an organic solvent or a supercritical fluid, thereby producing a re-polymerizable oligomer. A producing process of polylactic acid, wherein the re-polymerizable oligomer obtained by the above-mentioned depolymerization process is polymerized in the presence of a hydrolase or a polymerization catalyst.

REFERENCES:
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Mauduit et al Abstract “Hydrolytic degradation of films prepared from blends of high and low molecular weight poly(DL-lactic acid)s” Journal of Biomed Materials Res vol. 30 Iss 2 pp. 201-207 1998.
Sakai et al Abstract “Isolation of a Thermophilic Poly-L-Lactide Degrading Bacterium from Compost and its Enzymatic Charatererization” Jour Biosci & Bioeng vol. 92 No. 3 p. 298-300 (2001).
Williams., “Enzymic hydrolysis of polylactic acid,” MEP ltd., vol. 10, No. 1, pp. 5-7, 1981.
Matsumura et al., “Novel Ring-Opening Polymerization of Lactide by Lipase,” Macromol. Symp. 130, pp. 285-304, 1998.

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