Title:
ポリビニルアルコール組成物及びその用途、並びにビニル系樹脂の製造方法
Document Type and Number:
Japanese Patent JP7333777
Kind Code:
B2
Abstract:
A composition (D) containing (A) a modified poly(vinyl alcohol) and (B) an unsaturated monocarboxylic acid or a salt thereof, the composition (D) being characterized in that the modified poly(vinyl alcohol) (A) has a viscosity average polymerization degree of 100 to 600 inclusive and a saponification degree of 33 to 60 mol% inclusive and contains an acryloyl group or a methacryloyl group in an amount of 0.01 to 1.50 mol% inclusive in side chains thereof, the unsaturated monocarboxylic acid or a salt thereof (B) is at least one component selected from the group consisting of acrylic acid, methacrylic acid, sodium acrylate and sodium methacrylate, and the (modified poly(vinyl alcohol) (A))/(unsaturated monocarboxylic acid or a salt thereof (B)) mass ratio in the composition (D) is 82/18 to 99.9/0.1. Thus, a composition is provided, which contains a modified poly(vinyl alcohol) and can exhibit excellent performance as a dispersion stabilizer for the suspension polymerization of a vinyl compound even after a lapse of a long time after the production of the composition.
Inventors:
Tadahito Fukuhara
Application Number:
JP2020513433A
Publication Date:
August 25, 2023
Filing Date:
April 10, 2019
Export Citation:
Assignee:
KURARAY CO.,LTD.
International Classes:
C08F2/20; C08F2/38; C08F14/06; C08F290/12; C08L29/04; C09K23/52
Domestic Patent References:
| JP2007321099A | ||||
| JP2017105997A | ||||
| JP2001288214A |
Foreign References:
| WO2007119735A1 |
Attorney, Agent or Firm:
Setouchi International Patent Office