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:
Oct. 09, 2007
Filed:
Mar. 05, 2007
Adel Farhan Halasa, Bath, OH (US);
Steven Kristofer Henning, Downingtown, PA (US);
Scott K. Armstrong, Akron, OH (US);
Jacob Gerhan, Avon Lake, OH (US);
Adel Farhan Halasa, Bath, OH (US);
Steven Kristofer Henning, Downingtown, PA (US);
Scott K. Armstrong, Akron, OH (US);
Jacob Gerhan, Avon Lake, OH (US);
The Goodyear Tire & Rubber Company, Akron, OH (US);
Abstract
The present invention is directed to rubbery polymers, such as polybutadiene rubber or styrene-butadiene rubber, that contain tin coupling agents and provide desirable dispersion of carbon black in rubber compounds, such as for use in tire treads. The tin coupling agents are defined by the general formulas (I) (XSn)O or (II) (XSn)O—(CH)—O(XSn), wherein X is a halogen and n is 1 to 20. A method of rubbery polymer synthesis, in one embodiment, involves mixing anionically polymerizable conjugated diene monomers with optional vinyl aromatic and an anionic-polymerization initiator, i.e., an organolithium compound, to form a mixture of living polymers. A tin coupling agent is added to the mixture of living polymers effecting polymerization conditions to form the tin coupled rubbery polymer. Such tin coupled rubbery polymers can be utilized in tire tread rubbers where the rubbery polymers may provide desirable wear properties without substantially sacrificing other performance characteristics.