Title:
低分子量ジエン重合体の脱溶媒方法
Document Type and Number:
Japanese Patent JP2004503625
Kind Code:
A
Abstract:
A butadiene-type polymer suitable for use as a processing aid in a rubber composition is formed by polymerizing butadiene or other conjugated diene monomers in a solvent, such as hexane, to form a polymer of relatively low molecular weight (around 30-40,000 g/mole). The polymer is coupled with a coupling agent, such as tin tetrachloride, to increase its molecular weight to a level at which conventional desolventizing processes may be used to remove the solvent from the mix. After desolventizing, the polymer is decoupled, by heating, to return the polymer to its original molecular weight.
Inventors:
Lynch, Thomas
Application Number:
JP2002510558A
Publication Date:
February 05, 2004
Filing Date:
June 04, 2001
Export Citation:
Assignee:
Bridgestone Corporation
International Classes:
C08F4/44; C08C19/00; C08C19/08; C08C19/26; C08C19/44; C08F4/54; C08F36/04; (IPC1-7): C08C19/00; C08F4/44; C08F4/54
Domestic Patent References:
| JPH11164912A | 1999-06-22 | |||
| JPH01259016A | 1989-10-16 | |||
| JPH10139804A | 1998-05-26 | |||
| JPH11209439A | 1999-08-03 | |||
| JPH01229016A | 1989-09-12 | |||
| JPH07309914A | 1995-11-28 |
Attorney, Agent or Firm:
Heikichi Odashima