Thiuram polysulfide production

Details Thiuram polysulfide production Thiuram polysulfide production

1985-05-09

1991-06-04

Lee, Mary C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Esters having the thiocarboxylate group, -cx-, wherein the...

C07C33300

Patent

active

050216031

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.

REFERENCES:
patent: 1681717 (1928-08-01), Whitby
patent: 1780545 (1930-11-01), Whitby
patent: 2414014 (1947-01-01), Cable et al.
patent: 3116329 (1963-12-01), Hayes
patent: 4144272 (1979-03-01), Bergomi et al.
patent: 4459424 (1984-07-01), Eisenhuth et al.
patent: 4468526 (1984-08-01), Eisenhuth et al.

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