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:
Feb. 22, 2000
Filed:
Nov. 10, 1998
Uchu Mukai, Kodaira, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
The present invention provides a rubber composition in which the coexistence of low heat build-up, heat resistance and high hardness can be achieved without damaging failure characteristics. According to the present invention, a rubber composition comprising a 100 parts by weight of matrix rubber and a 2-75 parts by weight of a polyethylene composition which contains 0-80% by weight of polyethylene and 20% by weight or more of a composite comprising a polyethylene component and a rubber component previously bonded via a coupling agent to the polyethylene component, said rubber component is crosslinked with the matrix rubber. At least at one of the kneading stages before the final stage, the compound is kneaded so that the maximum temperature of the compound of the kneading of that stage is higher than the melting point of the polyethylene component mixed, preferably, by 10.degree. C. or more.