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:
Jun. 01, 1982
Filed:
Mar. 13, 1981
Bridgestone Tire Co., Ltd., Tokyo, JP;
Abstract
A method of preparing a nitrile rubber composition having modulus and excellent physical properties and abrasion resistance is disclosed. This composition is prepared by kneading at 120.degree.-160.degree. C. (a) a nitrile rubber, (b) an .alpha.,.beta.-ethylenically unsaturated carboxylic acid, (c) a divalent metal compound, (d) a secondary aryl amine, cooling the kneaded mass below 100.degree. C., adding to the kneaded mass (e) an organic peroxide, and heating and curing the resulting mixture at 110.degree.-180.degree. C. The addition of the secondary aryl amine considerably improves the physical properties of the composition. These compositions have not a tendency of scorching and are superior in the workability as compared with conventional carboxylated nitrile rubber compositions produced by emulsion polymerization.