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. 23, 2001
Filed:
Aug. 13, 1998
Applicant:
Inventors:
Dieter Brück, Köln, DE;
Udo Wolf, Kempen, DE;
Assignee:
Bayer AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08C 1/902 ; C08F 8/04 ; G01N 2/165 ;
U.S. Cl.
CPC ...
C08C 1/902 ; C08F 8/04 ; G01N 2/165 ;
Abstract
The present invention relates to a process for the preparation of partially hydrogenated acrylonitrile-butadiene rubber in a pressurised reactor by hydrogenation of acrylonitrile-butadiene rubber by means of homogeneous or heterogeneous catalysis, in which the reactor contents are rendered inert before commencement of the hydrogenation, the Raman spectra of the reactor contents are recorded at short time intervals and the actual degree of hydrogenation of the product is determined from the intensities of the Raman emission lines and, on attainment of the required degree of hydrogenation, the reaction is arrested by suitable means.