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:
Mar. 15, 2016
Filed:
Apr. 18, 2013
Bridgestone Corporation, Chuo-ku, Tokyo, JP;
Junko Matsushita, Tachikawa, JP;
Shojiro Kaita, Oizumi-machi, JP;
BRIDGESTONE CORPORATION, Tokyo, JP;
Abstract
A method for producing a polymer containing silica that does not involve long kneading time, and a polymer composition having an intended low heat generation property. A polymerization catalyst composition is produced by mixing and aging a second element and a third element, and then adding a first element to the mixture to react the first element with the mixture. The first element contains a compound that contains a rare earth metal element, the second element contains a compound represented by the following formula (X), and the third element contains silica. YRRR(X) (In the formula, Y is a metal; Rand Rare hydrogen atoms or hydrocarbon groups; and Ris a hydrocarbon group, and R, R, and Rare the same as or different from each other, a, b, and c are 0 or 1.).