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:
Jan. 16, 2018
Filed:
Nov. 04, 2016
Sumitomo Rubber Industries, Ltd., Kobe-shi, Hyogo, JP;
Hiroki Nakajima, Kobe, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-shi, Hyogo, JP;
Abstract
An object of the present invention is to provide a rubber composition for tire which can improve initial grip performance and stable grip performance during running at a high level while maintaining sufficient abrasion resistance, and a pneumatic tire having a tread composed of this rubber composition for tire. The rubber composition for tire comprises 70 to 200 parts by mass of a filler and 60 to 250 parts by mass of a softener compounding 15 to 60 parts by mass of a predetermined tackifying resin with a softening point of not less than 110° C. based on 100 parts by mass of a diene rubber component comprising not less than 20% by mass of a SBRa having a glass transition temperature of −35 to 15° C., a styrene content of 35 to 48% by mass and a vinyl unit quantity in the butadiene component of 35 to 55%.