Title:
VINYL ALCOHOL POLYMER, METHOD FOR PRODUCING VINYL ALCOHOL POLYMER, DISPERSANT FOR SUSPENSION POLYMERIZATION, DISPERSION ASSISTANT FOR SUSPENSION POLYMERIZATION, AND METHOD FOR PRODUCING VINYL POLYMER
Document Type and Number:
WIPO Patent Application WO/2022/071345
Kind Code:
A1
Abstract:
The present invention provides: a novel vinyl alcohol polymer; a method for producing this vinyl alcohol polymer; a dispersant for suspension polymerization, said dispersant enabling the achievement of polymer particles which have a small average particle diameter, while containing fewer coarse particles, and which exhibit good plasticizer absorption; a dispersion assistant for suspension polymerization; and a method for producing a vinyl polymer. The present invention provides a vinyl alcohol polymer which comprises a carbonyl group, a formyl group and an alkenyl group in a same molecule or in different molecules. The present invention also provides a method for producing a vinyl alcohol polymer, said method comprising: a step for polymerizing a vinyl ester in the presence of an aliphatic unsaturated aldehyde; and a step for saponifying the thus-obtained vinyl ester polymer.
Inventors:
FUKUYAMA MISUZU (JP)
KATO MASAKI (JP)
KATO MASAKI (JP)
Application Number:
PCT/JP2021/035708
Publication Date:
April 07, 2022
Filing Date:
September 28, 2021
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
C08F16/06; C08F2/20; C08F2/38; C08F290/04
Domestic Patent References:
| WO2013187455A1 | 2013-12-19 | |||
| WO2015182567A1 | 2015-12-03 | |||
| WO2015182567A1 | 2015-12-03 |
Foreign References:
| JPS6189208A | 1986-05-07 |
Attorney, Agent or Firm:
AMANO Kazunori (JP)
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