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:
Sep. 09, 2025
Filed:
May. 11, 2021
Applicant:
Nok Corporation, Tokyo, JP;
Inventors:
Assignee:
NOK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L 9/02 (2006.01); C08K 3/014 (2018.01); C08K 3/22 (2006.01); C08K 3/30 (2006.01); C08K 5/01 (2006.01); C08K 5/09 (2006.01);
U.S. Cl.
CPC ...
C08L 9/02 (2013.01); C08K 3/014 (2018.01); C08K 3/22 (2013.01); C08K 3/30 (2013.01); C08K 5/01 (2013.01); C08K 5/09 (2013.01); C08K 2003/2296 (2013.01);
Abstract
An NBR composition that includes, based on 100 parts by weight of NBR, 0.2 to 0.7 parts by weight, preferably 0.2 to 0.5 parts by weight, of stearic acid, and paraffin wax, which has the melting start temperature of 65° C., in an amount equal to 2 to 6 times the amount of said stearic acid, and preferably further zinc oxide and a UV resistant antioxidant. The NBR composition has improved ozone resistance using stearic acid and paraffin wax, which are generally compounded in NBR compositions, while neither affecting the material physical properties or product appearance, nor increasing the compounding amount of an ozone resistant antioxidant.