Polysulfided olefin compositions, their preparation and use as a

Details Polysulfided olefin compositions, their preparation and use as a Polysulfided olefin compositions, their preparation and use as a

1986-10-17

1989-01-03

Dixon, Jr., William R.

Compositions

Electrolytes for electrical devices

252 488, 568 18, 568 21, C10M13500, C07C14900

Patent

active

047955767

ABSTRACT:
The disclosed polysulfided olefin compositions can be used in particular as extreme-pressure additives for lubricants. They are prepared by a process comprising the steps of:
(1) reacting sulfur monochloride and/or dichloride with at least one monoolefin having 2 to 5 carbon atoms (generally isobutene) to form an "adduct"; (2) contacting said "adduct" jointly with an unsaturated monohalogenated hydrocarbon compound, in a proportion corresponding to a number of halogen gram-atoms from about 1 to 70% of the number of halogen gram-atoms of the assembly "monohalogenated hydrocarbon compound+adduct", with a sulfur compound (e.g. alkaline sulfide, hydrogenosulfide or polysulfide) and, mostly, element sulfur, in a proportion of 0 to 7 gram-atoms per mole of sulfur compound, within an aqueous or hydroalcoholic medium; (3) heating the mixture and, after settling in 2 phases, separating the organic phase containing the polysulfided olefin, and (4) optionally treating the obtained product with a base.
The obtained polysulfided olefins, depending on their sulfur content, may be used as extreme-pressure additives in oil compositions for gears or for metal working.

REFERENCES:
patent: 4645610 (1987-02-01), Born et al.

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