Title:
MODIFIED VINYL ALCOHOL POLYMER, DISPERSION STABILIZER FOR SUSPENSION POLYMERIZATION, AND METHOD FOR POLYMERIZING VINYL COMPOUND
Document Type and Number:
WIPO Patent Application WO/2021/206128
Kind Code:
A1
Abstract:
Provided is a dispersion stabilizer for suspension polymerization, the dispersion stabilizer making it possible to obtain, through suspension polymerization of a vinyl compound such as vinyl chloride, resin particles having uniform particle diameters and few large particles, and also having a high porosity and a large plasticizer absorption. A modified vinyl alcohol polymer has a hydrodynamic radius (Rh) (unit: nm) that satisfies equation (1) where x is the viscosity average polymerization degree. (1): 0.186x0.542 × 1.30 ≥ Rh ≥ 0.186x0.542 × 1.06
Inventors:
WATANABE WATARU (JP)
Application Number:
PCT/JP2021/014828
Publication Date:
October 14, 2021
Filing Date:
April 07, 2021
Export Citation:
Assignee:
DENKA COMPANY LTD (JP)
International Classes:
C08F8/12; C08F2/20; C08F290/06
Domestic Patent References:
| WO2019156006A1 | 2019-08-15 | |||
| WO2013125678A1 | 2013-08-29 | |||
| WO2010113569A1 | 2010-10-07 | |||
| WO2013115239A1 | 2013-08-08 |
Foreign References:
| JP2001040019A | 2001-02-13 | |||
| JP2001233904A | 2001-08-28 |
Attorney, Agent or Firm:
AXIS PATENT INTERNATIONAL (JP)
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