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:
Jun. 29, 1999
Filed:
May. 23, 1996
Applicant:
Inventors:
Tadashi Shibata, Tokyo, JP;
Ryota Fujio, Tokyo, JP;
Assignee:
Bridgestone Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
524575 ; 524496 ; 524571 ; 526173 ; 526174 ; 526175 ; 526181 ; 526204 ; 526209 ; 526335 ; 526340 ; 525250 ; 525271 ;
Abstract
A rubber composition having good breaking properties, high tan.delta., good wear resistance and a method for preparing a copolymer used in the rubber composition. The copolymer is a butadiene-styrene copolymer prepared in the presence of an organopotassium compound, an oxolanyl alkane and an organolithium initiator compound. The copolymer may be modified. A vulcanite of the rubber composition including 20 parts or more of the copolymer of the present invention has good properties.