Title:
A manufacturing method of dispersion stabilizer for suspension polymerization, and vinyl system resin
Document Type and Number:
Japanese Patent JP6225391
Kind Code:
B2
Abstract:
A dispersion stabilizer for suspension polymerization of vinyl compounds comprising a vinyl alcohol polymer (A) which has a saponification degree of 30 mol% or more and less than 60 mol% and a viscosity-average polymerization degree (P) of more than 200 and less than 600, and has a terminal alkyl group having 6 to 18 carbon atoms, and in which a content of monomer units having an oxyalkylene group is 0.3 mol% or less and the relationship between the viscosity-average polymerization degree (P) and a modification rate (S)(mol%) of the alkyl group satisfies Formula (1). Thus, there can be provided a dispersion stabilizer for suspension polymerization with which, during suspension polymerization of vinyl compounds including vinyl chloride, even when it is used in a small amount, the absorbency of a plasticizer is high, resulting in easy processing and formation of coarse particles is little and the remaining monomer components can be easily removed.
Inventors:
Tadahito Fukuhara
Yosuke Kumaki
Yosuke Kumaki
Application Number:
JP2014525836A
Publication Date:
November 08, 2017
Filing Date:
July 17, 2013
Export Citation:
Assignee:
KURARAY CO.,LTD.
International Classes:
C08F2/20; C08F8/12; C08F14/06; C08F16/06
Domestic Patent References:
| JP54025990A | ||||
| JP51018779A | ||||
| JP2003176306A |
Foreign References:
| WO2007069422A1 |
Other References:
大木道則ら編著,化学辞典,日本,東京化学同人,1994年,第1版第2刷,pp.70右欄
Attorney, Agent or Firm:
Shigeki Nakatsugu
Shunichiro Ito
Shunichiro Ito