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US 12,049,599 B2Granted
Alkylated alkoxydiarylamine antioxidants
AssigneeLANXESS Corporation
InventorRobert G. Rowland
Life of this patent
Estimating the term…
Abstract
Alkylated diaryl amines further substituted by an alkoxy group on one or more aryl carbon atoms exhibit excellent antioxidant activity in lubricant compositions.
Claims14
An 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 the alkoxy group R′O is on the phenyl ring at the 2- or 3-position relative to the nitrogen atom.
2 more elements
Dependencies are inferred from the claim text.