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:
Nov. 17, 2009
Filed:
Jan. 30, 2004
Kazutake Watanabe, Syunan, JP;
Osamu Yatabe, Syunan, JP;
Takeshi Karato, Chiyoda-ku, JP;
Yoshihiro Chino, Chiyoda-ku, JP;
Takahiko Fukahori, Chiyoda-ku, JP;
Kazutake Watanabe, Syunan, JP;
Osamu Yatabe, Syunan, JP;
Takeshi Karato, Chiyoda-ku, JP;
Yoshihiro Chino, Chiyoda-ku, JP;
Takahiko Fukahori, Chiyoda-ku, JP;
Tokuyama Corporation, Yamaguchi, JP;
Zeon Corporation, Tokyo, JP;
Abstract
The present invention is to provide a diene rubber composition and a cross-linked diene rubber thereof excellent in tensile strength, wear resistance and processability, keeping compatibility of both good fuel efficiency and high gripping property, and a production method thereof. What is characterized in the composition is that the composition is comprised of 100 parts by weight of a diene rubber having a molecular weight distribution expressed in terms of the ratio of the weight-average molecular weight to the number-average molecular weight of 1.1 to 30, 20 to 200 parts by weight of silica and a cationic polymer, and that a toluene-insoluble rubber content per gram of the silica within the range from 0.2 to 1 g, and diene cross-linked rubber thereof. What is characterized in the production method is that the method comprises steps of allowing rubber latex stabilized by an anionic emulsifying agent to react with an aqueous suspension of silica containing a cationic polymer and effecting co-coagulation of rubber in the rubber latex with the silica in the aqueous suspension within a specific pH range.