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. 02, 2019
Filed:
Feb. 05, 2016
Bridgestone Corporation, Tokyo, JP;
Takayuki Maruyama, Tokyo, JP;
Kazuya Murata, Tokyo, JP;
Seiichi Kato, Tokyo, JP;
Tomokatsu Ikuta, Saitama, JP;
BRIDGESTONE CORPORATION, Tokyo, JP;
Abstract
As a rubber composition excellent in fatigue resistance and a method for producing the same, this disclosure provides a rubber composition containing a zinc oxide, wherein: a total volume of aggregates of the zinc oxide with a diameter of 20 μm or more is 0.008 or less in the rubber composition by volume fraction; and a method for producing the rubber composition, comprising: preparing a wet masterbatch by using a carbon black with a surface average acidic functional group amount (μeq/m) of 0.15 or more and less than 3.00, preferably 0.40 or more and less than 1.50; and compounding a zinc oxide with the wet masterbatch.