Title:
ENLARGEMENT OF PARTICLE OF CONJUGATED DIENE COPOLYMER RUBBER LATEX
Document Type and Number:
Japanese Patent JPH1160611
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To reduce the proportion of synthetic rubber latex particles having unenlarged particle diameters while controlling the increase in the viscosity of synthetic rubber latex after particle diameter enlargement by adding a specified acid-modified copolymer latex to a conjugated diene copolymer rubber latex. SOLUTION: An acid-modified copolymer latex is obtained by polymerizing 100 pts.wt. monomer mixture comprising 5-40 wt.%, preferably 10-30 wt.%, monomer containing acid groups, such as (meth)acrylic acid, 10-95 wt.%, preferably 30-75 wt.% conjugated diene monomer such as 1,3-butadiene, and 0-85 wt.%, preferably 0-60 wt.% monomer copolymerizable therewith and other than an acrylic ester in the presence of 0.1-10 pts.wt. emulsifier, 0.001-5 pts.wt. polymerization initiator, and 0.01-5 pts.wt. molecular weight modifier. The acid- modified copolymer latex in an amount of 0.01-10 pts.wt. (on a solid content basis) is added to a conjugated diene copolymer rubber latex in an amount of 100 pts.wt. (on a solid content basis).
Inventors:
HAGIWARA KATSUO
SUNAYAMA KATSUMI
SUNAYAMA KATSUMI
Application Number:
JP23646197A
Publication Date:
March 02, 1999
Filing Date:
August 19, 1997
Export Citation:
Assignee:
NIPPON ZEON CO
International Classes:
C08L9/00; C08C1/065; C08L13/02; (IPC1-7): C08C1/065; C08L9/00; C08L13/02
Attorney, Agent or Firm:
Katsuhiro Yoshida (1 person outside)
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