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:
Apr. 05, 2011
Filed:
May. 19, 2008
Ryuji Nakagawa, Kodaira, JP;
Junko Matsushita, Tachikawa, JP;
Yoichi Ozawa, Kodaira, JP;
Shojiro Kaita, Tokyo, JP;
Olivier Tardif, Wako, JP;
Ryuji Nakagawa, Kodaira, JP;
Junko Matsushita, Tachikawa, JP;
Yoichi Ozawa, Kodaira, JP;
Shojiro Kaita, Tokyo, JP;
Olivier Tardif, Wako, JP;
Bridgestone Corporation, Tokyo, JP;
Riken, Saitama, JP;
Abstract
This invention provides a polybutadiene capable of improving wear resistance and resistance to crack growth in a rubber composition and a tire, wherein values of e, f and g derived from the following determinant (I): (wherein a is a mountain peak value around 1130 cmin a transmittance spectrum through Fourier transform infrared spectroscopy (FT-IR), and b is a valley peak value around 967 cm, and c is a valley peak value around 911 cm, and d is a valley peak value around 736 cm) satisfy relationships of equation (II): (Calculated value of cis-1,4 bond)=e/(e+f+g)×100≧99 and equation (III): (Calculated value of vinyl bond)=g/(e+f+g)×100≦0.