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US 10,808,197 B2Granted
Alkylated alkoxydiarylamine antioxidants
AssigneeLANXESS Solutions US Inc.
InventorRobert G. Rowland
Life of this patent
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Abstract
Alkylated diaryl amines further substituted by an alkoxy group on one or more aryl carbon atoms exhibit excellent antioxidant activity in lubricant compositions.
Claims22
A lubricating oil composition comprising
- a) a lubricating oil, and
- b) one or more alkylated alkoxydiarylamine of formula III:
- wherein x is 0, 1 or 2 and y is 1, 2 or 3;
- R′ is C1-12 alkyl or C1-12 alkyl substituted by one or more hydroxyl or alkoxy;
- each R is independently C4-24 alkyl, C7-18 aralkyl, or C4-24 alkyl substituted by one or more hydroxyl and/or interrupted by one or more oxygen atom;
- wherein the total number of carbon atoms of the combined groups R is 12 or higher, and wherein at least one carbon atom adjacent to the amine nitrogen is unsubstituted.
3 more elements
Dependencies are inferred from the claim text.