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Patent Searching and Data


Title:
SILK FIBROIN AND ITS PREPARATION
Document Type and Number:
Japanese Patent JPS57191315
Kind Code:
A
Abstract:

PURPOSE: Silk fibroin that is made by bonding N,N-dialkylaminoethyl methacrylate to silk fibroin or regenerated one, thus being used in paints, cosmetics and food products, because of its high pigment adsorption, moisture retention and smell retention.

CONSTITUTION: N,N-dialkylaminoethyl methacrylate of the formula (R1, R2 are alkyl) or a copolymer containing the same as the major component is made to react with a suspension of silk fibroin, preferably of fine particles of 0.1W100 microns particle sizes, or regenerated silk fibroin containing more than 50wt% hot water-insoluble fibroin (β-type) with an average molecular weight of more than 50,000 and a crystallinity of more than 10%, by 0.5W100wt% in the presence of a radical polymerization catalyst such as ammonium persulfate by 0.1W 10wt% based on the above methacrylate at 30W100°C under stirring.


Inventors:
Otoi, Kiyoshi
Application Number:
JP1981000076865
Publication Date:
November 25, 1982
Filing Date:
May 20, 1981
Export Citation:
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Assignee:
KANEBO KENSHI KK
International Classes:
D06M14/06; D01B7/00; D01B7/04; D06M101/00; D06M101/02; D06M101/10; D06M101/12; (IPC1-7): D01B7/00; D01B7/04