摘要:
The invention relates to compounds of the metal dihydrocarbyl-dithiophosphyl-dithiophosphate type, their manufacture and use. These compounds can be represented by the general formula: ##STR1## wherein R is a monovalent substantially hydrocarbon-containing radical of 1 to 30 carbon atoms, X and Y are each a hydrogen atom or a monovalent substantially hydrocarbon-containing radical of 1 to 30 carbon atoms, M is a metal selected from zinc, cadmium, lead and antimony or an oxygen--and/or sulfur--containing molybdenum complex, and n is the valence of said metal M. The compounds according to the invention can be used as additives for lubricants wherein they act as a very efficient wear preventive.
摘要:
Compositions of olefin polysulfides having an increased solubility in mineral oils and in synthetic oils, particularly of the hydrogenated polyalphaolefin (P.A.O.) type, are disclosed.They are prepared more particularly by reacting a sulfur monochloride with a monoolefin (e.g. isobutene) so as to form an addition product, called an adduct, which is then reacted with an alkali metal or ammonium polysulfide, obtained, for example, by reacting a mercaptan with an alkali hydroxide or ammonia in the presence of elemental sulfur. These compositions of olefin polysulfides can be used as extreme-pressure additives in gear-oils or in metal-working oils.
摘要:
A method for the preparation of olefin polysulfides that can be used in particular as extreme pressure additives for lubricants is described. This method comprises: (1) reacting sulfur monochloride or dichloride with at least one mono-olefin containing 2 to 5 carbon atoms (in general isobutene) resulting in the formation of an adduct; (2) bringing into contact said adduct, conjointly with a hydrocarbyl halide, with a sulfur compound (for example, alkaline sulfides, hydrosulfides or polysulfides) and, in most cases, elemental sulfur, in an aqueous or aqueous-alcoholic medium; (3) heating the mixture and, after it has settled into two phases, separating the organic phase containing the olefin polysulfide; and if necessary (4) treating the product obtained with a base.The olefin polysulfides obtained contain a high proportion of sulfur, have a satisfactory viscosity and are sufficiently soluble in mineral oils as well as synthetic oils to be used as extreme pressure additives in the formulation of gear oils. Some of these products are also advantageous in the formulation of oils intended to be used in metal work.