Title:
PRODUCTION OF POLYVINYL ALCOHOLIC SPHERICAL FINE PARTICLE
Document Type and Number:
Japanese Patent JP3173741
Kind Code:
B2
Abstract:
PURPOSE: To obtain a spherical polyvinyl alcoholic resin excellent in particle size distribution of ≤50μm average particle diameter by simultaneously carrying out the saponifying and fine powdering.
CONSTITUTION: A solution of a vinyl acetate-based polymer containing a saponification catalyst in an alcohol is spray-dried to carry out the saponifying and fine powdering. Thereby, the objective fine powder containing ≥50wt.% fine particles having ≤50μm average particle diameter is obtained.
Inventors:
Yoshihiko Miyamoto
Tomita Munetoshi
Tomita Munetoshi
Application Number:
JP13154292A
Publication Date:
June 04, 2001
Filing Date:
April 24, 1992
Export Citation:
Assignee:
Nippon Synthetic Chemical Industry Co., Ltd.
International Classes:
C08F8/12; C08J3/12; (IPC1-7): C08J3/12
Domestic Patent References:
| JP4874546A |
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