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. 13, 2019
Filed:
Feb. 19, 2015
Ube Industries, Ltd., Ube-shi, Yamaguchi, JP;
Sumitomo Rubber Industries, Ltd., Kobe-shi, Hyogo, JP;
Mitsuharu Ambe, Ichihara, JP;
Yuuto Kanou, Ichihara, JP;
Takeshi Shoda, Ichihara, JP;
Takahiro Mabuchi, Kobe, JP;
Toshifumi Haba, Kobe, JP;
UBE INDUSTRIES, LTD., Ube-shi, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-shi, JP;
Abstract
The present invention provides a rubber composition for a tire having improved workability and abrasion resistance. A rubber composition for a tire according to the present invention comprises: a polybutadiene which has: (A) a Mooney viscosity (ML) being 43 or more; (B) a ratio (Tcp/ML) of 5 wt % toluene solution viscosity (Tcp) to Mooney viscosity (ML) being 0.9 to 2.3; (C) a stress relaxation time (T80) being 10.0 to 40.0 seconds, which is a time until a torque is attenuated by 80% when the torque at the end of MLmeasurement is 100%; and (D) a molecular weight distribution (Mw/Mn) being 2.50 to 4.00; another rubber (ii); and a rubber reinforcing material (iii).