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:
Oct. 05, 2021
Filed:
Nov. 02, 2018
Zeon Corporation, Tokyo, JP;
Akito Nakai, Tokyo, JP;
ZEON CORPORATION, Tokyo, JP;
Abstract
A method produces a hydrogenated nitrile rubber having an iodine value of 120 or less, the method having a first coagulation step of adding a halogen atom-free metal salt as a coagulant to a nitrile rubber latex to form a nitrile rubber coagulum; a solution preparation step of dissolving the nitrile rubber coagulum in an organic solvent to prepare a nitrile rubber solution; a hydrogenation step of subjecting the nitrile rubber solution to a hydrogenation reaction to afford a hydrogenated nitrile rubber solution; and a second coagulation step of adding a divalent metal salt as a coagulant to the hydrogenated nitrile rubber solution to form a hydrogenated nitrile rubber coagulum.