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. 22, 2020
Filed:
Dec. 25, 2015
Zeon Corporation, Tokyo, JP;
Akito Nakai, Tokyo, JP;
Shinsuke Sugawara, Tokyo, JP;
ZEON CORPORATION, Tokyo, JP;
Abstract
Method of production of highly saturated nitrile rubber, including: polymerization step of polymerizing monomer mixture containing at least α,β-ethylenically unsaturated nitrile monomer and diene monomer in medium to obtain dispersion or solution of nitrile rubber; coagulation step causing the nitrile rubber dispersion or solution to coagulate at 10-60° C. to obtain solid form nitrile rubber; hydrogenation reaction step causing solid form nitrile rubber to disperse or dissolve in medium to obtain the nitrile rubber dispersion or solution and performing hydrogenation reaction of the obtained nitrile rubber dispersion or solution to obtain dispersion or solution of highly saturated nitrile rubber, wherein the hydrogenation reaction, the content of compound having a mercapto group having 9-12 carbon atoms is 50 wt ppm or less and content of compound having a mercapto group having 13-16 carbon atoms is 1-120 wt ppm with respect to 100 wt % of the nitrile rubber content in the nitrile rubber dispersion or solution.