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, 2013
Filed:
Jun. 04, 2009
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 relates to an aromatic vinyl compound-conjugated diene compound copolymer capable of giving excellent wear resistance and resistance to wet skid to a tire, and more particularly to an aromatic vinyl compound-conjugated diene compound copolymer obtained by an addition polymerization of an aromatic vinyl compound and a conjugated diene compound in the presence of a polymerization catalyst composition comprising at least one specified metallocene complex selected from the group consisting of a metallocene complex represented by the following general formula (I): (wherein M is a lanthanoid element, scandium or yttrium, and Cpis independently a non-substituted or substituted indenyl, and Rto Rare independently an alkyl group having a carbon number of 1-3 or a hydrogen atom, and L is a neutral Lewis base, and w is an integer of 0-3) and so on, wherein a content of cis-1,4 bond in a conjugated diene compound portion is not less than 80%.