US 11,492,566 B2 · Ether-based lubricant compositions, methods and uses

Abstract

The present invention provides a lubricant composition comprising a base oil of lubricating viscosity, wherein the base oil comprises an ether base stock of formula (A), where: Ra and Rb are aliphatic hydrocarbyl groups and may be the same or different; the lubricant composition further comprising at least one aminic anti-oxidant and at least one phenolic anti-oxidant. In some embodiments, the ether base stock has the formula (1), where: R1 R2, R3, R4, R5 and R6 are as defined herein. The lubricant composition may be used for lubricating a surface in an internal combustion engine as well as for improving the fuel economy performance and/or piston cleanliness performance of an engine and/or a vehicle, such as an automotive vehicle associated with an internal combustion engine.

Claims21

Dependent claims

A lubricant composition comprising a base oil, wherein the base oil comprises greater than 50% by weight of an ether base stock of formula (2):

where:
R1, R2, R4, and R6 are C1-15 alkyl;
R3 and R5 are H or C1-15 alkyl;
and
n is 1;
the lubricant composition further comprising at least one aminic anti-oxidant and at least one phenolic anti-oxidant;
wherein the at least one phenolic anti-oxidant is selected from alkylated mono-phenols, alkylated hydroquinones, hydroxylated thiodiphenyl ethers, alkylidenebisphenols, acylaminophenols, and sulphurised alkyl phenols and alkali and alkaline earth metal salts thereof;
and
wherein the at least one aminic anti-oxidant is selected from alkylated and non-alkylated aromatic amines, alkylated diphenylamines, N-alkylated phenylenediamines, phenyl-α-naphthylamine, and alkylated phenyl-α-naphthylamines.

6 more elements

Dependencies are inferred from the claim text.

Ether-based lubricant compositions, methods and uses

Life of this patent

Ether-based lubricant compositions, methods and uses

Life of this patent

Abstract

Claims21