Antioxidant combinations of molybdenum complexes and organic sulfur compounds for lubricating oils
First Claim
1. A lubricating oil additive comprising a combination of(a) an oil soluble sulfur containing molybdenum complex prepared by (1) reacting an acidic molybdenum compound and a basic nitrogen compound selected from the group consisting of a succinimide, carboxylic acid amide, Mannich base, phosphonamide, thiophosphonamide, phosphoramide, dispersant viscosity index improvers, or mixtures thereof to form a molybdenum complex wherein from 0.01 to 2 atoms of molybdenum are present per basic nitrogen atom, and (2) reacting said complex with a sulfur containing compound in an amount to provide 0.1 to 4 atoms of sulfur per atom of molybdenum, and(b) an oil soluble organic sulfur compound or mixtures thereof wherein the organic sulfur compound of component (b) is present in an amount of from 0.02 to 10 parts by weight per part by weight of the sulfur containing molybdenum complex.
1 Assignment
0 Petitions
Accused Products
Abstract
An antioxidant additive combination for lubricating oils is prepared by combining (a) a sulfur containing molybdenum compound prepared by reacting an acidic molybdenum compound, a basic nitrogen compound, and a sulfur compound, with (b) an organic sulfur compound.
75 Citations
16 Claims
-
1. A lubricating oil additive comprising a combination of
(a) an oil soluble sulfur containing molybdenum complex prepared by (1) reacting an acidic molybdenum compound and a basic nitrogen compound selected from the group consisting of a succinimide, carboxylic acid amide, Mannich base, phosphonamide, thiophosphonamide, phosphoramide, dispersant viscosity index improvers, or mixtures thereof to form a molybdenum complex wherein from 0.01 to 2 atoms of molybdenum are present per basic nitrogen atom, and (2) reacting said complex with a sulfur containing compound in an amount to provide 0.1 to 4 atoms of sulfur per atom of molybdenum, and (b) an oil soluble organic sulfur compound or mixtures thereof wherein the organic sulfur compound of component (b) is present in an amount of from 0.02 to 10 parts by weight per part by weight of the sulfur containing molybdenum complex.
Specification