Title:
PROCESS FOR PRODUCTION OF PELLICLE AND COATED FILM CONTAINING POLYVINYL ALCOHOL AND HAVING REDUCED WATERRSOLUBILITY
Document Type and Number:
Japanese Patent JPS5277159
Kind Code:
A
Abstract:
Improvement for the production of films and coatings containing polyvinyl alcohol and reduced water solubility, characterized in that the polyvinyl alcohol, with an asterification index of at most 200 mg koh/g, is post-acrylated in aqueous phase with alkaline or alkaline earth hydroxide at high temperature, alkaline or alkaline earth ions precipitating in the form of an inert charge remaining in the polyvinyl alcohol, for which substances containing the corresponding anions are added, in the form of compounds that are hardly soluble in water, and the suspension of polyvinyl alcohol thus obtained it is applied in the form of films or coatings, optionally drying at elevated temperature and under reduced pressure. (Machine-translation by Google Translate, not legally binding)
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Inventors:
HERUMAN SHINTORERU
UORUFUGANGU TSUIMERUMAN
UORUFUGANGU TSUIMERUMAN
Application Number:
JP15149676A
Publication Date:
June 29, 1977
Filing Date:
December 18, 1976
Export Citation:
Assignee:
HOECHST AG
International Classes:
C08F8/00; C08F8/12; C08L29/00; C08L29/02; C09D129/04; (IPC1-7): C08F8/12; C08L29/04; C09D3/74; C09D5/00; C09J3/14