Amines of alkoxydiphenyl esthers as antioxidants and lubricating oils and greases containing same
AssigneeUop LLC
InventorJohn T. Roberts
Life of this patent
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Abstract
N-Monosubstituted 2'- or 4'-amino-4-alkoxy-diphenyl ethers, where the N-substituent is an arylmethyl group, are effective antioxidants in a wide variety of petroleum products and petroleum related products. Within the class of arylmethyl groups, heteroaryl groups are especially desirable, as exemplified by pyridinylmethyl and thienylmethyl.
Claims20
A method of inhibiting oxidation in lubricating oils and greases comprising adding thereto an oxidation inhibiting amount of a material with the structure ##STR2## where --NHCH.sub.2 A is at the 2'- or 4'-position, A is a monovalent radical whose parent is selected from the group consisting of unsubstituted and ring-substituted aromatic and heteroaromatic rings, and X is an alkyl group containing up to about 18 carbon atoms.
A composition comprising a major amount of a lubricating oil or grease and a minor amount from about 0.05% to about 5% by weight of a material with the structure, ##STR3## where --NHCH.sub.2 A is at the 2'- or 4'-position, A is a monovalent radical whose parent is selected from the group consisting of unsubstituted and ring-substituted aromatic and heteroaromatic rings, and X is an alkyl group containing up to about 18 carbon atoms.
Dependencies are inferred from the claim text.