US 2019/0203137 A1 · LOW TRACTION/ENERGY EFFICIENT LIQUID CRYSTAL BASE STOCKS

Abstract

A method for improving wear control, while maintaining or improving energy efficiency, in an engine or other mechanical component lubricated with a lubricating oil, by using as the lubricating oil a formulated oil. The formulated oil includes at least one lubricating oil base stock having one or more liquid crystals represented by the formula: R1-(A)m-Y—(B)n—R2 wherein R1 and R2 are the same or different and are a substituted or unsubstituted, hydrocarbon, alkoxy or alkylthio group having from 2 to 24 carbon atoms; A and B are the same or different and are a cycloaliphatic group or aromatic group, provided at least one of A and B is an aromatic group; Y is a covalent bond, —CH2-CH2-, —CH═CH—, —OCOO—, —CO—, —CSO—, —CSS—, —CS—, —O—, —S—, —SO—, —SO2-, —CH2O—, —OCH2O—, —NO—, —ONO2, or —C≡N; and m and n are independently 0, 1, 2 or 3. The lubricating oil base stock has a kinematic viscosity of 2 cSt to 200 cSt at 40° C., and 1 cSt to 25 cSt at 100° C. Also, this disclosure relates to low traction/energy efficient liquid crystal base stocks containing liquid crystals.

Claims28

Dependent claims

A lubricating oil base stock comprising one or more liquid crystals, wherein the one or more liquid crystals are represented by the formula:

R1-(A)m-Y—(B)n—R2
wherein R1 and R2 are the same or different and are a substituted or unsubstituted, hydrocarbon, alkoxy, or alkylthio group having from about 2 to about 24 carbon atoms;
A and B are the same or different and are a cycloaliphatic group or aromatic group, provided at least one of A and B is an aromatic group;
Y is a covalent bond, —CH2-CH2-, —CH═CH—, —OCOO—, —CO—, —CSO—, —CSS—, —CS—, —O—, —S—, —SO—, —SO2-, —CH2O—, —OCH2O—, —NO—, —ONO2, or —C≡N;
and m and n are independently 0, 1, 2 or 3;
and wherein the lubricating oil base stock has a kinematic viscosity of about 2 cSt to about 200 cSt at 40° C., as determined according to ASTM D445, and a kinematic viscosity of about 1 cSt to about 25 cSt at 100° C., as determined according to ASTM D445.

3 more elements

wherein the at least one lubricating oil base stock comprises one or more liquid crystals, wherein the one or more liquid crystals are represented by the formula:
R1-(A)m-Y—(B)n—R2
wherein R1 and R2 are the same or different and are a substituted or unsubstituted, hydrocarbon, alkoxy, or alkylthio group having from about 2 to about 24 carbon atoms;
A and B are the same or different and are a cycloaliphatic group or aromatic group, provided at least one of A and B is an aromatic group;
Y is a covalent bond, —CH2-CH2-, —CH═CH—, —OCOO—, —CO—, —CSO—, —CSS—, —CS—, —O—, —S—, —SO—, —SO2-, —CH2O—, —OCH2O—, —NO—, —ONO2, or —C≡N;
and m and n are independently 0, 1, 2 or 3;
and wherein the lubricating oil base stock has a kinematic viscosity of about 2 cSt to about 200 cSt at 40° C., as determined according to ASTM D445, and a kinematic viscosity of about 1 cSt to about 25 cSt at 100° C., as determined according to ASTM D445;
and
wherein wear control is improved and energy efficiency is maintained or improved as compared to wear control and energy efficiency achieved using a lubricating oil containing a lubricating oil base stock other than the lubricating oil base stock comprising one or more liquid crystals.

6 more elements

Dependencies are inferred from the claim text.

Low traction/energy efficient liquid crystal base stocks

Life of this patent

Low traction/energy efficient liquid crystal base stocks

Life of this patent

Abstract

Claims28