METHOD FOR PRODUCING STABLE WATER-IN-OIL TYPE EMULSION OF POLYVINYLAMINE

PROBLEM TO BE SOLVED: To provide a method for producing a stable water-in-oil type emulsion of polyvinylamine, which is obtained by hydrolyzing a water-in-oil type emulsion of an N-vinyl carboxylic acid amide polymer with an acid or a base.SOLUTION: In the method for hydrolyzing an in-oil dispersion...

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Hauptverfasser:	WAKATSUKI SHOGO, TAKEO KAZUYO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for producing a stable water-in-oil type emulsion of polyvinylamine, which is obtained by hydrolyzing a water-in-oil type emulsion of an N-vinyl carboxylic acid amide polymer with an acid or a base.SOLUTION: In the method for hydrolyzing an in-oil dispersion liquid of an aqueous solution of an N-vinyl carboxylic acid amide polymer in the presence of an acid or a base, hydrolysis is performed in the coexistence with a polyoxyalkylene alkyl ether. It is desirable to add the polyoxyalkylene alkyl ether after the polymerization of N-vinyl carboxylic acid amide before the hydrolysis step, and it is desirable that the HLB is in the range of 8.0-14.0.