Process for the production of thiuram polysulfides
CA 1285946 C · Owner: Zengel, Hans-Georg · Inventors: Eisenhuth, Ludwig; Bergfeld, Manfred; Zengel, Hans-Georg
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the production of thiuram polysulfides substituted by aliphatic, araliphatic and/or cycloaliphatic hydrocarbon radicals in which correspondingly substituted secondary amines having a pKa-value of >8 are reacted with carbon disulfide and sulfur in a solvent at 0 to 150°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 distinguished over known processes for the production of thiuram polysulfides in particular by the substantially quantitative …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted July 9, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.