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. 16, 2016
Filed:
Nov. 25, 2011
Ayumi Naka, Hiratsuka, JP;
Takashi Shirokawa, Hiratsuka, JP;
Makoto Ashiura, Hiratsuka, JP;
Yoshihiro Kameda, Hiratsuka, JP;
Masaki Satou, Hiratsuka, JP;
Keisuke Maejima, Hiratsuka, JP;
Ayumi Naka, Hiratsuka, JP;
Takashi Shirokawa, Hiratsuka, JP;
Makoto Ashiura, Hiratsuka, JP;
Yoshihiro Kameda, Hiratsuka, JP;
Masaki Satou, Hiratsuka, JP;
Keisuke Maejima, Hiratsuka, JP;
Abstract
A rubber composition comprises a diene rubber including not less than 25% by weight of a modified conjugated diene polymer rubber and, per 100 parts by weight of the diene rubber, from 25 to 65 parts by weight of a filler, the filler comprising not less than 50% by weight of silica. The silica has a DBP absorption number of 190 to 250 ml/100 g, an NSA of 194 to 225 m/g, and a CTAB of 185 to 215 m/g. A ratio of the NSA to the CTAB is from 0.9 to 1.4. The modified conjugated diene polymer rubber has a terminal modified group including a functional group that interacts with the silica. In the modified conjugated diene polymer rubber, aromatic vinyl unit content is from 38% to 48% by weight, vinyl unit content is from 20% to 35%, and weight-average molecular weight is from 600,000 to 1,000,000.