Title:
アクリル酸及びメタクリル酸とアルキルポリアルキレングリコールからなるエステルの水溶性ポリマーの使用法
Document Type and Number:
Japanese Patent JP4167006
Kind Code:
B2
Abstract:
Water soluble polymer comprising esters of acrylic acid, methacrylic acid and alkylpolyalkyene glycols, is prepared by esterification followed by radical polymerization of the resulting mixture in an aqueous medium, whereby the organic solvent is azeotropically distilled off during the polymerization and recycled to the mixture or is replaced by the addition of fresh water. A water soluble polymer (I) comprising esters of acrylic acid, methacrylic acid and alkylpolyalkyene glycols, is prepared by esterification of a mixture of acrylic acid (A), methacrylic acid (B) and an alkylpolyalkylene glycol (C) having a mol.wt. (Mw) of 350-4000 in a molar ratio of (A) to (C) of 0.1-4:1, a molar ratio of (B to (C) of 1-5:1 and molar ratio of the sum of (A) and (B) to (C) of 2-6:1, in the presence of an organic solvent that forms an azeotrope with water to at least 85 wt.% (w.r.t. (C)), followed by radical polymerization of the resulting mixture in an aqueous medium, whereby the organic solvent is azeotropically distilled off from the reaction mixture during the polymerization and the distilled water is recycled to the mixture or is replaced by the addition of fresh water.
Inventors:
Matthias, Chronor
Karl-Heinz, Buchner
Gregor, Broto
Karl-Heinz, Buchner
Gregor, Broto
Application Number:
JP2002140930A
Publication Date:
October 15, 2008
Filing Date:
May 16, 2002
Export Citation:
Assignee:
BASF SE
International Classes:
C04B7/52; C08F299/02; C04B24/26; C04B24/32; C08F2/10; C08F6/10; C08F8/14; C08F290/06; C08G65/332; C08L71/02; C04B103/52
Domestic Patent References:
| JP2003096147A | ||||
| JP2001031458A | ||||
| JP2000351753A | ||||
| JP2000159881A | ||||
| JP2000154247A | ||||
| JP2003515634A | ||||
| JP2004502792A |
Attorney, Agent or Firm:
Satoshi Eto