The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 2001
Filed:
Jun. 12, 1998
Applicant:
Inventor:
Thomas J. Lynch, Akron, OH (US);
Assignee:
Bridgestone Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 2/02 ;
U.S. Cl.
CPC ...
C07C 2/02 ;
Abstract
The instant invention provides a process for substantially reducing the polymer cement viscosity or reducing the molecular weight distribution of the a conjugated diene polymer synthesized by using a charge of catalytically effective amounts of a rare earth catalyst and an organo magnesium component by adding an organo zinc component to the charge in an amount and under conditions sufficient to reduce the polymer cement viscosity. The invention also contemplates a catalyst compostion for substantially reducing the polymer cement viscosity of a polymer product as well the resultant polymer product.