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US 2020/0339905 A1Published application
Hydraulic composition for extreme cold
AssigneeTotal Marketing Services
InventorsNicolas CHAMPAGNE, Eric RAPIN
Life of this patent
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Abstract
The invention relates to the field of lubricants and provides a lubricating composition comprising at least one base oil, the kinematic viscosity of which measured at 40° C. does not exceed 10 mm2/s and the pour point of which does not exceed −50° C., and at least one thickener, said lubricating composition having a pour point not exceeding −55° C.
Claims14
Lubricant composition comprising:
- at least one base oil having kinematic viscosity measured at 40° C. less than or equal to 10 mm2/s and having a pour point lower than or equal to −50° C.;
- and
- at least one thickener selected from among:
- polyalkylene glycols (PAGs) comprising at least 50 weight % of butylene oxide repeat units and having kinematic viscosity measured at 100° C. according to standard ASTM D445 (2015) greater than or equal to 50 mm2/s, kinematic viscosity measured at 40° C. according to standard ASTM D445 (2015) greater than or equal to 500 mm2/s, and a viscosity index measured according to standard ASTM D2270 (2012) higher than or equal to 160;
- linear or branched, alkoxylated polyethylene glycols;
- and
- mixtures thereof;
- said lubricant composition having a pour point lower than or equal to −55° C.
5 more elements
Dependencies are inferred from the claim text.