POWDERING OF ACRYLATE POLYMER

PURPOSE:To obtain an inexpensive powdery resin having improved water absorption free from decomposition, by putting a predried powdery acrylate polymer in a dryer, preparing the titled polymer from a solution comprising an acrylate polymer without requiring grinding process. CONSTITUTION:An acrylate...

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Bibliographic Details
Main Authors ARAKI HIDEKAZU, TAKAGI SHIYUUJI, NANBA HIROYUKI
Format Patent
LanguageEnglish
Published 22.07.1982
Subjects
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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Summary:PURPOSE:To obtain an inexpensive powdery resin having improved water absorption free from decomposition, by putting a predried powdery acrylate polymer in a dryer, preparing the titled polymer from a solution comprising an acrylate polymer without requiring grinding process. CONSTITUTION:An acrylate polymer, preferably a polymer obtained by reversed phase emulsion polymerization, etc. from a monomer having a partial neutralization degree of 50-90mol% is blended with powdery acrylate polymer which is predried in a dryer in such a way that a ratio of the polymer to water in the system becomes >=3/2, and the blend is dried in a dryer at drying temperature <=150 deg.C preferably in an inert gas atmosphere with stirring. No pretreatment is required at all, nor processes such as cutting, grinding, classification, etc. are needed. When the ratio of the polymer before the start of drying to water is<3/2, powdery polymer is not obtained and the polymer becomes granular or bulky.
Bibliography:Application Number: JP19810002469