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AssigneeAsahi Denka Kogyo Kabushiki Kaisha
InventorsMasashi Umemura, Masanori Konishi, Aritoshi Fukushima, Junichi Hisano, Toshiaki Okamoto
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A lubricant composition comprises as essential ingredients a sulfur compound and an oil-soluble molybdenum compound, obtained by reacting one or more of hexavalent molybdenum compounds selected from the group consisting of molybdenum polyoxide, molybdic acid and the alkali salt thereof or a compound prepared by reaction of the compounds and a reducing agent, with an amino compound represented by the general formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 which may be identical with or different from each other individually represent hydrogen atoms or hydrocarbon groups of 1 to 30 carbon atom. The lubricant additives comprising the novel molybdenum-amine complex and the sulfur-containing compound in combination are excellent in the anti-oxidation, anti-wear and friction-reducing effect and, particularly, excellent in view of the metal corrosion.
A lubricant composition comprising a blend of a sulfur-containing compound and an oil-soluble molybdenum compound wherein the ratio of sulfur atoms to molybdenum atoms is higher than 0.5, said oil-soluble molybdenum compound having been obtained by reacting (1) at least one hexavalent molybdenum compound selected from the group consisting of molybdenum trioxide, molybdic acid and alkali salts of molybdic acid, with (2) a secondary amino compound having the formula ##STR7## wherein R.sub.2 and R.sub.3, which are the same or different, are hydrocarbon groups having 1 to 30 carbon atoms.
A lubricant composition comprising a blend of a sulfur-containing compound and an oil-soluble molybdenum compound wherein the ratio of sulfur atoms to molybdenum atoms is higher than 0.5, said oil-soluble molybdenum compound having been obtained by reducing at least one hexavalent molybdenum compound selected from the group consisting of molybdenum trioxide, molybdic acid and alkali salts of molybdic acid, with a reducing agent capable of reducing the molybdenum valency to five or four, whereby to obtain a first reaction product and then reacting said first reaction product with an amino compound having the formula ##STR8## wherein R.sub.1, R.sub.2 and R.sub.3, which are the same or different, are hydrogen or hydrocarbon groups having 1 to 30 carbon atoms, with the proviso that at least one of R.sub.1, R.sub.2 and R.sub.3 is a hydrocarbon group.
Dependencies are inferred from the claim text.