Lubricant composition
AssigneesTotal Marketing Services, Dow Global Technologies LLC
InventorsNicolas Champagne, Nadjet Khelidj
Life of this patent
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Abstract
Disclosed is a lubricant composition including: at least one base oil; at least one polyalkylene glycol with at least 50% by weight of butylene oxide units and having a kinematic viscosity, measured at 100° C. according to standard ASTM D445 (2015), which is greater than or equal to 50 mm2/s, a kinematic viscosity, measured at 40° C. according to standard ASTM D445 (2015), which is greater than or equal to 1000 mm2/s and a Viscosity Index, measured according to standard ASTM D2270 (2012), which is greater than or equal to 180. Also disclosed is the use of such a composition for transmission or gear lubrication.
Claims12
Method for reducing traction coefficient comprising lubricating at least one mechanical part of a transmission member of motor vehicles or industrial gears with at least one lubricant composition comprising:
- at least one base oil;
- at least one polyalkylene glycol (PAG) comprising at least 50% by weight of butylene oxide units and having a kinematic viscosity measured at 100° C. according to ASTM D445 (2015) greater than or equal to 50 mm2/s, a kinematic viscosity measured at 40° C. according to ASTM D445 (2015) greater than or equal to 1000 mm2/s, and a viscosity index measured according to ASTM D2270 (2012) greater than or equal to 180,
- wherein the PAG is obtained by reaction with butylene oxides of one or more polyols comprising 2 to 12 carbon atoms, and
- wherein the PAG comprises an O/C ratio (oxygen atom/carbon atom) weight/weight between 0.29 and 0.38.
Dependencies are inferred from the claim text.