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:
May. 05, 2015
Filed:
Aug. 31, 2010
Michael Klimpel, Langenfeld, DE;
Sven Brandau, Strasbourg, FR;
Uwe Westeppe, La Wantzenau, FR;
Christopher Barner-kowollik, Stutensee-Blankenloch, DE;
Andreas Kaiser, Strasbourg, FR;
Michael Klimpel, Langenfeld, DE;
Sven Brandau, Strasbourg, FR;
Uwe Westeppe, La Wantzenau, FR;
Christopher Barner-Kowollik, Stutensee-Blankenloch, DE;
Andreas Kaiser, Strasbourg, FR;
LANXESS Deutschland GmbH, Cologne, DE;
Abstract
A new process is provided for preparing nitrile rubbers by free-radical polymerization in an organic solvent and in the presence of specific modifier substances. This polymerization may be followed by hydrogenation to give likewise new hydrogenated nitrile rubbers, the hydrogenation advantageously taking place likewise in organic solvent. The optionally hydrogenated nitrile rubbers obtained are notable for having fragments of the employed modifier substances in the main polymer chain and/or as end groups. They can be prepared with a wide diversity of molecular weights and polydispersity indices, especially with very low polydispersity indices.