Title:
PRODUCTION OF CARBOXYL-MODIFIED BUTADIENE-BASED COPOLYMER LATEX
Document Type and Number:
Japanese Patent JP3297110
Kind Code:
B2
Abstract:
PURPOSE: To produce a copolymer latex without remarkable generation of gels under an excellent emulsion polymerization stability by polymerizing raw materials composed of butadiene, an ethylenebased unsaturated carboxylic acid and copolymerizable monomers according to a specified two-stage polymerization method.
CONSTITUTION: In production of the copolymer latex composed of (A) 10 to 80 pts.wt. butadiene, (B) 0.3 to 10 pts.wt. ethylene-based unsaturated carboxylic acid, (C) 10 to 89.7 pts.wt. other monomers copolymerizable therewith, 50 to 90wt.% of the whole monomers is initially polymerized at 40 to 60°C. The remainder monomers corresponding to 10 to 50wt.% of the whole monomers are then added thereto at a point of time of ≥60wt.% conversion and polymerized at 60 to 110°C. Acrylic acid, maleic acid, etc., is used as the component (B) and methyl methacrylate, styrene, etc., can be used as the component (C). In addition, the solid matter content of the objective copolymer latex is preferably 45 to 55wt.%.
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Inventors:
Tsunehisa Shinohara
Toshihide Kaneko
swan
Toshihide Kaneko
swan
Application Number:
JP35243892A
Publication Date:
July 02, 2002
Filing Date:
December 11, 1992
Export Citation:
Assignee:
ASAHI KASEI KABUSHIKI KAISHA
International Classes:
C08F36/00; C08L13/02; C08L21/02; (IPC1-7): C08F36/00; C08L13/02
Domestic Patent References:
| JP6452898A | ||||
| JP5279406A |
Attorney, Agent or Firm:
Takeshi Shimizu (1 person outside)