Title:
ビニル系樹脂の製造方法
Document Type and Number:
Japanese Patent JP4238287
Kind Code:
B1
Abstract:
The present invention provides a method for producing a vinyl resin in which, in suspension polymerization of a vinyl compound using a polymerization tank equipped with a reflux condenser, uniform vinyl polymer particles are obtained and an excellent defoaming property is achieved against dry foam that occurs at middle to later stages of the polymerization. The present invention provides a method for producing a vinyl resin including the step of in suspension polymerization of a vinyl compound using a polymerization tank equipped with a reflux condenser in the presence of a dispersion stabilizer for suspension polymerization, adding, at the time when the polymerization conversion is 10% or more, 0.001 to 5 parts by weight of a vinyl alcohol polymer (A) that has, in its side chain, an unsaturated double bond, an aromatic group optionally having a carboxyl group, a saturated aliphatic group having a carboxyl group, or a saturated aliphatic group having at least 11 carbon atoms, with respect to 100 parts by weight of the vinyl compound.
Inventors:
Masami Kato
Masato Nakamae
Masato Nakamae
Application Number:
JP2008540378A
Publication Date:
March 18, 2009
Filing Date:
June 10, 2008
Export Citation:
Assignee:
KURARAY CO.,LTD.
International Classes:
C08F2/18
Domestic Patent References:
| JP2007063369A | ||||
| JP7173219A | ||||
| JP57119902A |
Foreign References:
| WO2007119735A1 |
Attorney, Agent or Firm:
Koichi Kamata
Koji Amano
Koji Amano