Title:
RESIN COMPOSITION CONTAINING MODIFIED POLYVINYL ALCOHOL POLYMER, METHOD FOR PRODUCING SAID RESIN COMPOSITION, DISPERSION STABILIZER FOR SUSPENSION POLYMERIZATION, AND METHOD FOR PRODUCING VINYL RESIN
Document Type and Number:
WIPO Patent Application WO/2022/259658
Kind Code:
A1
Abstract:
Provided is a resin composition that contains a modified polyvinyl alcohol polymer useful as a dispersion stabilizer suitable for obtaining resin particles having minute and highly uniform particle sizes, few coarsened particles, and a high bulk specific gravity when suspension-polymerization of a vinyl compound such as vinyl chloride is carried out. The resin composition contains, in a main chain, a modified polyvinyl alcohol polymer having the structural unit shown in general formula (I) and a homopolymer of polyvinyl alcohol. The mass percentage of the homopolymer of polyvinyl alcohol in a total of 100 mass% of the modified polyvinyl alcohol polymer and the homopolymer of polyvinyl alcohol is 0 to 5 mass%. (In the formula, X and Y represent a lower alkyl group having 1 to 12 carbon atoms, a hydrogen atom, or a metal atom, and may be the same or different. Z represents the number of repeating units and is an integer from 0 to 3.)
Inventors:
MATSUMOTO MASANORI (JP)
WATANABE SATOSHI (JP)
WATANABE SATOSHI (JP)
Application Number:
PCT/JP2022/009813
Publication Date:
December 15, 2022
Filing Date:
March 07, 2022
Export Citation:
Assignee:
DENKA COMPANY LTD (JP)
International Classes:
C08F8/00; C08F2/20; C08F218/04; C08F222/12; C08L29/04
Domestic Patent References:
| WO2019181915A1 | 2019-09-26 | |||
| WO2015019613A1 | 2015-02-12 |
Foreign References:
| JPS5138753B1 | 1976-10-23 | |||
| JPS59204999A | 1984-11-20 | |||
| JPS62119202A | 1987-05-30 | |||
| US5112905A | 1992-05-12 | |||
| JP2008116854A | 2008-05-22 | |||
| JP2019105008A | 2019-06-27 |
Attorney, Agent or Firm:
AXIS PATENT INTERNATIONAL (JP)
Download PDF: