PRODUCTION METHOD OF VINYLLACTAM POLYMER

PROBLEM TO BE SOLVED: To provide a production method of a vinyllactam polymer, which is low in contents of a residual monomer and a free lactam, and without causing problems such as a discoloring in storage. SOLUTION: The vinyllactam polymer is produced by polymerizing a monomer component, composed...

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Bibliographic Details
Main Authors KURIYAMA TOSHIAKI, KITADA AKIRA, FUJISE KEIICHI, FUKU TAISEI, INUI YASUKO
Format Patent
LanguageEnglish
Published 13.02.2003
Edition7
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:PROBLEM TO BE SOLVED: To provide a production method of a vinyllactam polymer, which is low in contents of a residual monomer and a free lactam, and without causing problems such as a discoloring in storage. SOLUTION: The vinyllactam polymer is produced by polymerizing a monomer component, composed essentially of a vinyllactam monomer, wherein a water-soluble azo initiator is used and a pH of a reaction solution is maintained to be 5-10 until a rate of polymerization of the vinyllactam monomer is above 98%.
Bibliography:Application Number: JP20010233186