Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Reexamination Certificate
2005-07-05
2005-07-05
Acquah, Samuel A. (Department: 1711)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
C528S355000, C528S357000, C528S359000, C525S461000, C525S471000, C526S062000, C526S065000, C524S755000, C524S765000, C524S770000, C524S783000, C524S784000, C524S786000
Reexamination Certificate
active
06913826
ABSTRACT:
In polymerizing biodegradable polymer material, a compressed gas is used as a reaction solvent for a solution-polymerization, in order to prepare biodegradable polyester homopolymer and copolymer with a high molecular weight in a fine powder form with a particle size of 0.01˜1000 μm.
REFERENCES:
David D. Hile and M.V. Pishko, “Ring-opening precipitation polymerization of poly (D,L-lactide-co-glycolide) in supercritical carbon dioxide”, Macromol. Rapid Commun., vol. 20, No. 10, pp. 511-514 (1999).
David D. Hile, Michael V. Pishko, “Emulsion Copolymerization of D,L-Lactide and Glycolide in Supercritical Carbon Dioxide”, J. Polym., Sci.: Polym. Chem. 39, pp. 562-570 (2001).
Kim Soo Hyun
Kim Young Ha
Lee Youn-Woo
Lim Jong Sung
Pack Ji Won
Acquah Samuel A.
Korea Institute of Science and Technology
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