Title:
【発明の名称】星形ポリジメチルシロキサンブロック共重合体およびその製法
Document Type and Number:
Japanese Patent JPH08504865
Kind Code:
A
Abstract:
A star block copolymer comprised of vinyl aromatic hydrocarbon and/or conjugated diene polymer arms and polydimethylsiloxane arms radiating outwardly from a polyalkenyl aromatic coupling agent core is produced by first anionically polymerizing a vinyl aromatic hydrocarbon and/or a conjugated diene to produce living polymer arms, reacting the living polymer arms with a polyalkenyl aromatic coupling agent to couple the arms thereto, polymerizing this coupled product with hexa-methylcyclotrisiloxane in the presence of a polar promoter and then terminating the polymerization.
Inventors:
Hokusmeier, Ronald The James
Application Number:
JP51483594A
Publication Date:
May 28, 1996
Filing Date:
December 22, 1993
Export Citation:
Assignee:
Ciel International Research Mart Shats Pay BV
International Classes:
C08G77/42; C08G77/442; C08F8/00; (IPC1-7): C08G77/442; C08F8/00
Attorney, Agent or Firm:
Yoshio Kawaguchi (2 outside)