Invention Grant
- Patent Title: Alpha-olefin block copolymer particles and process for the production thereof
- Patent Title (中): α-烯烃嵌段共聚物颗粒及其制备方法
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Application No.: US866369Application Date: 1986-05-23
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Publication No.: US4820775APublication Date: 1989-04-11
- Inventor: Akinobu Shiga , Masahiro Kakugo , Hajime Sadatoshi , Hiroyuki Kora , Toshio Sasaki , Junpei Kojima , Kazuki Wakamatsu , Syozo Kawamata
- Applicant: Akinobu Shiga , Masahiro Kakugo , Hajime Sadatoshi , Hiroyuki Kora , Toshio Sasaki , Junpei Kojima , Kazuki Wakamatsu , Syozo Kawamata
- Applicant Address: JPX Osaka
- Assignee: Sumitomo Chemical Company Limited
- Current Assignee: Sumitomo Chemical Company Limited
- Current Assignee Address: JPX Osaka
- Priority: JPX60-110977 19850523
- Main IPC: C08F297/00
- IPC: C08F297/00 ; C08F4/16 ; C08F4/52 ; C08F297/08
Abstract:
A process for the production of .alpha.-olefin block copolymer particles having excellent impact resistance at low temperature and excellent molding and processing characteristics, is disclosed. The process includes a two step gas phase polymerization procedure under specific conditions in the presence of a specific catalyst system.
Public/Granted literature
- US5774472A Semiconductor memory device capable of realizing stable test mode operation Public/Granted day:1998-06-30
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