Title:
懸濁重合用分散安定剤
Document Type and Number:
Japanese Patent JP4238286
Kind Code:
B2
Abstract:
The present invention provides a dispersion stabilizer having an excellent polymerization stability. When used for suspension polymerization of vinyl compounds even in small amounts, the dispersion stabilizer according to the present invention attains the effects that: with respect to vinyl polymer particles to be obtained, the plasticizer absorptivity is high, leading to easy processing; residual monomer components such as a vinyl compound can be removed easily; the number of coarse particles is small; the obtained particles are as uniform as possible in particle size so that formation of fish-eyes can be prevented. The present invention provides a dispersion stabilizer for suspension polymerization including a polyvinyl alcohol polymer (A) having a saponification degree of 60 mol% or more and a polymerization degree of 200 or more, and a polyvinyl alcohol polymer (C) obtained by esterifying a polyvinyl alcohol polymer (B) having a saponification degree of less than 60 mol% with a carboxylic acid compound.
Inventors:
Masami Kato
Masato Nakamae
Masato Nakamae
Application Number:
JP2008530670A
Publication Date:
March 18, 2009
Filing Date:
April 07, 2008
Export Citation:
Assignee:
KURARAY CO.,LTD.
International Classes:
C08F2/20; C08F8/14; C08L29/04
Domestic Patent References:
| JP2002037807A | ||||
| JP7173219A | ||||
| JP2000239317A | ||||
| JP2007063369A |
Attorney, Agent or Firm:
Koichi Kamata
Koji Amano
Koji Amano