Lubricating oil additive composition
First Claim
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1. An additive composition for use in crankcase lubricating oils comprising:
- (1) an oil-soluble antioxidant selected from aromatic or alkyl sulfides and polysulfides, sulfurized olefins, sulfurized carboxylic acid esters, and sulfurized esterolefins, and(2) an oil-soluble hydroxy amine of the formula;
##STR9## wherein A is a C2 -C10 alkylene, and R is C1 -C30 alkyl.
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Abstract
A lubricating oil additive composition which imparts improved oxidation properties to crankcase lubricants comprises an antioxidant selected from aromatic or alkyl sulfides and polysulfides, sulfurized olefins, sulfurized carboxylic acid esters and sulfurized ester-olefins, and a hydroxy amine of the formula: ##STR1## wherein A and A'"'"' are C2 -C10 alkylene, R is C1 -C30 alkyl, Y is H, C1 -C6 alkyl of --A--OH, y is 0, 1 or 2, and x is 1 or 2. Lubricating oil compositions containing this additive composition are also disclosed.
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Citations
11 Claims
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1. An additive composition for use in crankcase lubricating oils comprising:
- (1) an oil-soluble antioxidant selected from aromatic or alkyl sulfides and polysulfides, sulfurized olefins, sulfurized carboxylic acid esters, and sulfurized esterolefins, and
(2) an oil-soluble hydroxy amine of the formula;
##STR9## wherein A is a C2 -C10 alkylene, and R is C1 -C30 alkyl. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10)
- (1) an oil-soluble antioxidant selected from aromatic or alkyl sulfides and polysulfides, sulfurized olefins, sulfurized carboxylic acid esters, and sulfurized esterolefins, and
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9. The composition of clam 8 wherein R is C18 alkyl.
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11. A method for inhibiting the oxidation of a lubricating oil which comprises adding to said lubricating oil from 0.25 to 10 percent weight of (1) an oil-soluble antioxidant selected from aromatic or alkyl sulfides and polysulfides, sulfurized olefins, sulfurized carboxylic acid esters and sulfurized ester-olefins, and from 0.001 to 5% weight of (2) an oil-soluble hydroxy amine of the formula ##STR10## wherein A is a C2 -C10 alkylene, and R is C1 -C30 alkyl.
Specification