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:
Jul. 10, 2007
Filed:
Jun. 02, 2003
Masao Nakamura, Chiyoda-ku, JP;
Masaaki Komatsu, Chiyoda-ku, JP;
Kouji Shouya, Chiyoda-ku, JP;
Kiyonori Umetsu, Chiyoda-ku, JP;
Takeshi Karato, Chiyoda-ku, JP;
Takahiko Fukahori, Chiyoda-ku, JP;
Masao Nakamura, Chiyoda-ku, JP;
Masaaki Komatsu, Chiyoda-ku, JP;
Kouji Shouya, Chiyoda-ku, JP;
Kiyonori Umetsu, Chiyoda-ku, JP;
Takeshi Karato, Chiyoda-ku, JP;
Takahiko Fukahori, Chiyoda-ku, JP;
Zeon Corporation, Tokyo, JP;
Abstract
A conjugated diene rubber obtained by a process wherein active conjugated diene polymer chains each having an active metal at a polymer chain terminal, which have been obtained by polymerizing a conjugated diene monomer alone, or a conjugated diene monomer and an aromatic vinyl monomer with the aid of an organic active metal in an inert solvent, are allowed to react with a specific polyorganosiloxane capable of reacting with the active metal bonded to the polymer chain terminal. The conjugated diene rubber contains at least 5% by weight of a structure comprising at least three conjugated diene polymer chains bonded through a polyorganosiloxane. The conjugated diene rubber gives, when silica is incorporated therein, a rubber composition having good processability and giving a crosslinked rubber having reduced heat build-up, good wet grip performance and good abrasion resistance.