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. 26, 2024
Filed:
Jul. 23, 2019
Applicant:
Sumitomo Rubber Industries, Ltd., Hyogo, JP;
Inventors:
Assignee:
Sumitomo Rubber Industries, Ltd., Hyogo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K 5/3445 (2006.01); B60C 1/00 (2006.01); C08K 3/04 (2006.01); C08K 3/36 (2006.01);
U.S. Cl.
CPC ...
C08K 5/3445 (2013.01); B60C 1/0016 (2013.01); C08K 3/04 (2013.01); C08K 3/36 (2013.01);
Abstract
The present invention provides rubber compositions and tires which provide improved overall performance in terms of wet grip performance and dry grip performance. Included is a rubber composition having a hardness that reversibly changes with water, satisfying the relationships (1) and (2) below, and having a stress at break of 8.0 MPa or more,Hardness when dry−Hardness when water-wet≥1 (1)wherein each hardness represents the JIS-A hardness at 25° C. of the rubber composition,0.90≤Volume when water-wet/Volume when dry≤1.01 (2)wherein each volume represents the volume at 25° C. of the rubber composition.