Title:
【発明の名称】耐衝撃性ポリスチレン系樹脂及びその製造方法
Document Type and Number:
Japanese Patent JP3345921
Kind Code:
B2
Abstract:
An impact-resistant styrenic polymer resin composition comprising a toughening agent of a very fine particle form dispersed in a styrenic polymer resin. The toughening agent comprises (I) a styrene (St)/butadiene di-block copolymer having MW of 30,000-1,000,000, MW distribution of 1.00-1.20, total bound St content of 30-70%,and block St content of at least 60% based on the total bound St content; and (II) a St/butadiene copolymer rubber, polybutadiene or a mixture thereof, which has MW of 1,000-1,000,000, MW distribution of 1.00-1.60, total bound St content of 0-15%, and cis-1,4 bond content of 10-80%;and the toughening agent has a JIS A hardness not larger than 75. The impact-resistant styrene polymer resin composition is prepared by subjecting a mixture of the toughening agent and the styrenic monomer or its mixture, to bulk polymerization or bulk-suspension polymerization.
Inventors:
Hidenori Ohnishi
Hiroaki Matsuda
Hiroaki Matsuda
Application Number:
JP28502192A
Publication Date:
November 18, 2002
Filing Date:
September 30, 1992
Export Citation:
Assignee:
Nippon Zeon Co., Ltd.
International Classes:
C08F291/02; C08F279/00; C08F279/02; C08F287/00; C08F291/00; C08F297/02; (IPC1-7): C08F291/02; C08F287/00
Domestic Patent References:
| JP234611A | ||||
| JP3140314A | ||||
| JP5148331A |
Attorney, Agent or Firm:
Yukio Uchida