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. 11, 2016
Filed:
Sep. 21, 2015
Sumitomo Rubber Industries, Ltd., Kobe-shi, Hyogo, JP;
Shuichiro Ono, Kobe, JP;
Sumitomo Rubber Industries, Ltd., Kobe-shi, JP;
Abstract
An object of the present invention is to provide a rubber composition which can further improve abrasion resistance without deterioration in energy efficiency, and a pneumatic tire using the rubber composition. The rubber composition comprises a polymer mixture obtained by modifying a polymer composed of at least one of a conjugated diene compound and an aromatic vinyl compound with a compound having at least one of an ester group and a carboxyl group; at least one of tetraamines; and silica, the polymer mixture having a weight-average molecular weight of 1.0×10to 1.0×10, and the tetraamines being a compound represented by the following formula (I): wherein each of R, R, R, R, R, R, Rand Rindependently represents a hydrogen atom or an alkyl group, and ALK represents a tetravalent aliphatic hydrocarbon group.