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:
Dec. 01, 2009
Filed:
Aug. 19, 2004
Shinji Tokunaga, Syunan, JP;
Tsunetoshi Sugimura, Syunan, JP;
Kazutaka Watanabe, Syunan, JP;
Osamu Yatabe, Syunan, JP;
Takeshi Karato, Tokyo, JP;
Takahiko Fukahori, Tokyo, JP;
Yoshihiro Chino, Tokyo, JP;
Shinji Tokunaga, Syunan, JP;
Tsunetoshi Sugimura, Syunan, JP;
Kazutaka Watanabe, Syunan, JP;
Osamu Yatabe, Syunan, JP;
Takeshi Karato, Tokyo, JP;
Takahiko Fukahori, Tokyo, JP;
Yoshihiro Chino, Tokyo, JP;
Tokuyama Corporation, Syunan-shi, JP;
Zeon Corporation, Tokyo, JP;
Abstract
Disclosed are silica-filled rubber granules comprised of a cocoagulation product of rubber and silica, which are extremely less powdery and excellent in handling and kneading, as well as an industrially advantageous process for producing same. The silica-filled rubber granules of the present invention are dried granules of a cocoagulation product of rubber and silica particles, which are characterized in that an average particle diameter (D50) in terms of the sieve analysis is 300˜3000 μm and the weight ratio of the granules within the range of D50±(D50×0.5) is at least 50% by weight. The silica-filled rubber granules are produced by supplying a cake of a cocoagulation product of silica and rubber having a water content of 40˜80% by weight to a drier provided with an indirect-heating type container having stirring wing blades, and then drying the cake while stirring it with the stirring wing blade.