Title:
【発明の名称】スチレン系樹脂組成物の製造方法
Document Type and Number:
Japanese Patent JP2762139
Kind Code:
B2
Abstract:
The present invention relates to a process for producing a rubber-modified styrene-based resin which comprises supplying a styrene-based monomer solution containing 5 to 20% by weight of a rubber component comprising a styrene-butadiene-based block copolymer having a styrene content of 20 to 50% by weight to a first polymerization zone where it is subjected to initial polymerization until the conversion reaches 10 to 30%, and then supplying the initial polymerization solution to a second polymerization zone where phase inversion is caused while at the same time increasing the conversion to 30 to 70% to thereby polymerize the monomer while controlling the rubber particle diameter to a range of 0.2 to 1.5 mu m and a ratio of area average rubber particle diameter/number average rubber particle diameter (Ds/Dn) to less more than 2.5. The process for production of rubber-modified styrene-based resin according to the present invention is easy in removal of polymerization heat, is decreased in power for agitation, for example, and does not need a high strength apparatus. Moreover, the rubber-modified styrene-based resin obtained by the process of the present invention has a high impact strength, and excellent gloss and stiffness; that is, it is excellent in a physical property balance.
More Like This:
Inventors:
ASHIDA TAKASUKE
SATO YOSHINORI
SATO YOSHINORI
Application Number:
JP30129289A
Publication Date:
June 04, 1998
Filing Date:
November 20, 1989
Export Citation:
Assignee:
IDEMITSU SEKYU KAGAKU KK
International Classes:
C08F2/00; C08F2/38; C08F279/00; C08F279/02; C08F287/00; (IPC1-7): C08F279/02; C08F2/00; C08F2/38
Domestic Patent References:
| JP57141414A | ||||
| JP63113009A | ||||
| JP4217492B1 | ||||
| JP4917432B1 |
Attorney, Agent or Firm:
Toro Kubota