Title:
POWDER OF SAPONIFIED ETHYLENE-VINYL ACETATE COPOLYMER AND ITS USE
Document Type and Number:
Japanese Patent JP3154785
Kind Code:
B2
Abstract:
PURPOSE: To prepare the subject powder which gives an aq. dispersion having an excellent stability in standing and a low viscosity even at a high concn. by specifically treating a specific saponified ethylene-vinyl acetate copolymer.
CONSTITUTION: The objective powder is prepd. by dissolving a saponified ethylene-vinyl acetate copolymer having an ethylene content of 20-60mol% and a degree of saponification of at least 90mol% in a mixture of water and a 1-4C alcohol under heating to give a soln. contg. 1-20wt.% the copolymer, cooling the soln. to precipitate the copolymer, adding an aliph. ketone (e.g. acetone) to the soln. contg. the precipitate under stirring to give a stable dispersion, and drying the dispersion to increase the content of the precipitate to 50wt.% or higher.
Inventors:
Miyake, Shinji
Fujita, Junko
Fujita, Junko
Application Number:
JP4238192A
Publication Date:
April 09, 2001
Filing Date:
January 30, 1992
Export Citation:
Assignee:
NIPPON SYNTHETIC CHEM IND CO LTD:THE
International Classes:
C08F8/12; C08J3/05; C08J3/12; C08J3/14; C08L23/04; C08L23/08; C08L23/26; C08L29/04; C09D123/26; C09D129/04; (IPC1-7): C08J3/14; C08L23/08; C08L29/04