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Title:
METHOD FOR PRODUCING VINYLPYRROLIDONE-BASED POLYMER
Document Type and Number:
Japanese Patent JP3315105
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To obtain a vinylpyrrolidone-based polymer capable of controlling inhibition of an N-vinylpyrrolidone polymerization reaction by a by-product of N-vinylpyrrolidone subjected to nucleus methylation and γ-butyrolactone, having a fixed molecular weight, a slight remaining monomer, for example, capable of exhibiting excellent performances in the case of forming a water absorbing resin by crosslinking.
SOLUTION: In this method for producing a vinylpyrrolidone-based polymer by polymerizing an N-vinylpyrrolidone-containing polymerizable monomer component, N-vinylpyrrolidone having ≤500 ppm γ-butyrolactone content is used as the N-vinylpyrrolidone and/or N-vinylpyrrolidone obtained without using acetylene as a raw material is used as the N-vinylpyrrolidone.


Inventors:
Taisei Tomihisa
Nobuyuki Harada
Akio Naka
Toshiaki Kuriyama
Yoshiharu Shimazaki
Hideyuki Nishibayashi
Application Number:
JP2000034191A
Publication Date:
August 19, 2002
Filing Date:
February 10, 2000
Export Citation:
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Assignee:
Nippon Shokubai Co., Ltd.
International Classes:
C08F26/10; C08F226/10; (IPC1-7): C08F26/10
Domestic Patent References:
JP8239354A
JP9249644A
JP10101745A
Attorney, Agent or Firm:
Takehiko Matsumoto