Title:
DISPERSANT FOR SUSPENSION POLYMERIZATION AND METHOD FOR PRODUCING VINYL-BASED POLYMER
Document Type and Number:
WIPO Patent Application WO/2022/097572
Kind Code:
A1
Abstract:
Provided are: a dispersant for suspension polymerization which, even when used in a small amount, can give polymer particles that have a small average particle diameter and a low coarse-particle content and that satisfactorily absorb plasticizers; and a method for producing a vinyl-based polymer. The dispersant for suspension polymerization includes a vinyl-alcohol-based polymer having a structure represented by formula (1) and satisfying relationship (2). In formula (1), R is a hydrocarbon group having 4 or more carbon atoms. In relationship (2), [X] is the content (mol%) of the structure represented by formula (1) with respect to all the structural units of the vinyl-alcohol-based polymer and [Ra,1] is the HSP distance ((J/cm3)1/2) between the structure represented by formula (1) and vinyl chloride. Relationship (2): 0.4≤[X]×102/[Ra,1]2≤3.0
Inventors:
FUJIMORI MISUZU (JP)
KATO MASAKI (JP)
TANIDA TATSUYA (JP)
KATO MASAKI (JP)
TANIDA TATSUYA (JP)
Application Number:
PCT/JP2021/039941
Publication Date:
May 12, 2022
Filing Date:
October 29, 2021
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
C08F2/20; C08F8/12; C08F14/00; C08F16/06
Domestic Patent References:
| WO2018096937A1 | 2018-05-31 | |||
| WO2019156006A1 | 2019-08-15 | |||
| WO2015119144A1 | 2015-08-13 | |||
| WO2018083968A1 | 2018-05-11 |
Foreign References:
| CN105218713A | 2016-01-06 | |||
| JP2004250695A | 2004-09-09 |
Attorney, Agent or Firm:
AMANO Kazunori (JP)
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