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. 27, 1985
Filed:
Apr. 22, 1982
Hiroyoshi Takao, Chiba, JP;
Keisaku Yamamoto, Ichihara, JP;
Akio Imai, Ichihara, JP;
Nobuyuki Yoshida, Ichihara, JP;
Hiroshi Furukawa, Kobe, JP;
Yuichi Saito, Nishinomiya, JP;
Akio Okumura, Kobe, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Sumitomo Rubber Industries, Limited, Kobe, JP;
Abstract
A diene rubber composition comprising 25 to 90 parts by weight of at least one high molecular weight diene rubber (A) having an intrinsic viscosity [.eta.] of at least 2.0 and a glass transition point of not lower than -50.degree. C. and 75 to 10 parts by weight of at least one low molecular weight diene rubber (B) having an intrinsic viscosity [.eta.] of 0.01 to 2.0, said composition having an average intrinsic viscosity of at least 1.8. Since this composition has an excellent wet grip and rolling resistance property and moreover has excellent processability, it is employed as tire tread rubber.