Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1996-09-25
1998-12-29
Zitomer, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528354, 528357, 528403, 528408, 528409, C08G 6900
Patent
active
058543848
ABSTRACT:
A process for preparing poly-.alpha.-amino acid particles comprising polymerizing an .alpha.-amino acid-N-carboxy anhydride using a polymerization initiator in an organic solvent in which both the solubility of the .alpha.-amino acid-N-carboxy anhydride and the solubility of the produced poly-.alpha.-amino acid are 0.1 g/100 ml or less at 25.degree. C. Polyamino acid particles having a high molecular weight and a small bulk specific gravity can be manufactured very easily without requiring specific procedures. The polyamino acid particles can be used as a coating material for papers, resins, rubbers, and fibers; particles for cosmetics; particles for diagnostic drugs; fillers for chromatography; and an encapsulating material for drugs, fertilizers, and perfumes.
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JP 4041526 -Feb. 12, 1992 -Derwent Abstract.
JP 3095223 -Apr. 19, 1991 -Derwent Abstract.
JP 93013168 -Feb. 19, 1993 -Derwent Abstract.
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Hattori Masayuki
Hayashi Toshio
Kuroda Kyoko
Makino Kenya
Yamakawa Yoshitaka
SR Corporation
Zitomer Fred
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