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:
Aug. 24, 2021
Filed:
Mar. 19, 2019
The Yokohama Rubber Co., Ltd., Tokyo, JP;
Ryosuke Takagi, Kanagawa, JP;
THE YOKOHAMA RUBBER CO., LTD., Tokyo, JP;
Abstract
A pneumatic tire includes 100 parts by mass of a rubber component including from 25-30 parts by mass of a diene rubber having a glass transition temperature of from −20° C. to −40° C., having a tertiary amine having an epoxy group as a modifying group, and a vinyl content from 35-45 mass %, 20-35 parts by mass of a diene rubber obtained by reacting a polyorganosiloxane to an active terminal of a diene-based polymer chain having the active terminal formed by making a polymer block A continuous with a polymer block B, the polymer block A including 80-95 mass % of isoprene and 5-20 mass % of an aromatic vinyl, having an active terminal, and having a weight average molecular weight from 500-15,000, the polymer block B including 1,3-butadiene and an aromatic vinyl and an active terminal, the vinyl content lower by from 5-25 mass % than that of the first conjugated diene polymer.