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:
Nov. 02, 2010
Filed:
Oct. 09, 2008
John Robert Zuppo, Iii, Canfield, OH (US);
Adel Farhan Halasa, Bath, OH (US);
Wen-liang Hsu, Cuyahoga Falls, OH (US);
Leh-yeh Hsu, Legal Representative, Cuyahoga Falls, OH (US);
John Robert Zuppo, III, Canfield, OH (US);
Adel Farhan Halasa, Bath, OH (US);
Wen-Liang Hsu, Cuyahoga Falls, OH (US);
Leh-Yeh Hsu, legal representative, Cuyahoga Falls, OH (US);
The Goodyear Tire & Rubber Company, Akron, OH (US);
Abstract
The present invention is directed to a catalyst system for synthesizing rubbery polymers, such as styrene-butadiene rubber, that can be utilized in tire tread rubbers. The catalyst system, in one embodiment, includes an organolithium compound and a potassium alkyl borohydride or potassium alkyl aluminum hydride defined by: (R)A(H)K, wherein A is boron or aluminum, H is hydrogen, K is potassium, and R, which is the same or different, is either H, a C-Calkyl, a C-Ccycloalkyl, phenyl, or phenyl substituted C-Calkyl, or a C-Ccycloalkyl, with the proviso that at least one R is a C-Calkyl, and further wherein any two R's may optionally be part of a carbocyclic ring. The rubbery polymers can have low to medium vinyl microstructure content, i.e., from about 10% to about 40%, and are useful in tire tread rubber compounds which can exhibit improved wear and tear characteristics.