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:
Jun. 04, 1991
Filed:
May. 09, 1985
Manfred Bergfeld, Erlenbach, DE;
Ludwig Eisenhuth, Obernburg, DE;
Hans-Georg Zengel, Kleinwallstadt, DE;
Akzo N.V., , NL;
Abstract
A process for the production of thiuram polysulfides substituted by aliphatic, araliphatic and/or cycloaliphatic hydrocarbon radicals is disclosed. In this process, correspondingly substituted secondary amines having a pKa value of .gtoreq.8 are reacted with carbon disulfide and sulfur in a solvent at 0.degree. to 150.degree. C. in the presence of a metal-containing catalyst and oxygen or an oxygen-containing gas. By virtue of its high purity, the thiuram polysulfide obtainable in this way may be directly used for its intended purpose, for example as a vulcanization accelerator or sulfur donor. This process is particularly desirable for the substantially quantitative yields and selectivities and also for its high economy arising from the reaction being carried out in a single stage without expensive auxiliaries and from the elimination of an additional purification step.