METHOD FOR PRODUCING VINYLPYRROLIDONE-BASED POLYMER POWDER

PROBLEM TO BE SOLVED: To provide a method for producing a sufficiently dried vinylpyrrolidone-based polymer powder. SOLUTION: The method for producing a vinylpyrrolidone-based polymer powder comprises the steps of: drying a vinylpyrrolidone-based polymer solution with a heating surface adhesion-type...

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Bibliographic Details
Main Authors OKAMURA KAZUHIRO, UKAMURA SHUKICHI
Format Patent
LanguageEnglish
Published 29.10.2009
Subjects
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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Summary:PROBLEM TO BE SOLVED: To provide a method for producing a sufficiently dried vinylpyrrolidone-based polymer powder. SOLUTION: The method for producing a vinylpyrrolidone-based polymer powder comprises the steps of: drying a vinylpyrrolidone-based polymer solution with a heating surface adhesion-type dryer to obtain a dried vinylpyrrolidone-based polymer; coarsely crushing the dried vinylpyrrolidone-based polymer under a temperature of 40 to 100°C and transporting the crushed polymer to a grinder under the same temperature; and grinding the crushed dried vinylpyrrolidone-based polymer. COPYRIGHT: (C)2010,JPO&INPIT
Bibliography:Application Number: JP20080097978