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:
Apr. 25, 2017
Filed:
Oct. 20, 2016
Sumitomo Rubber Industries, Ltd., Kobe-shi, Hyogo, JP;
Wakana Ito, Kobe, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-shi, JP;
Abstract
A vulcanized rubber composition assuring a well-balanced improvement of abrasion resistance, fuel efficiency and breaking resistance and a tire using a tread made of the vulcanized rubber composition are provided. The vulcanized rubber composition comprises a phase (SBR phase) comprising a styrene butadiene rubber being incompatible with a butadiene rubber and silica, and a phase (BR phase) comprising a butadiene rubber and silica, wherein the SBR phase and the BR phase are incompatible with each other, an abundance ratio α of silica in the SBR phase after vulcanization satisfies 0.3≦α≦0.7 (Relation 1), and a proportion β of the styrene butadiene rubber being incompatible with the butadiene rubber satisfies 0.4≦β≦0.8 (Relation 2), and the tire has a tread composed of the vulcanized rubber composition.