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:
May. 04, 2010
Filed:
Oct. 30, 2003
Masayuki Ohashi, Kodaira, JP;
Tadashi Shibata, Kodaira, JP;
Masayuki Ohashi, Kodaira, JP;
Tadashi Shibata, Kodaira, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
There is provided a rubber composition for a tread obtained by compounding (a) 5-40 parts by mass of a softening agent including an oil in which an extraction quantity with dimethylsulfoxide (DMSO) by IP346 process is controlled to less than 3% by mass and (b) 5-40 parts by mass of a liquid polymer having a viscosity average molecular weight of 45,000-100,000 based on 100 parts by mass of a rubber component, and considerably improving the fracture properties and wear resistance and controlling the lowering of the modulus of elasticity as compared with the case of compounding the conventional high aromatic oil.