Lubricant composition and a method to lubricate a mechanical device
AssigneeDow Brasil Sudeste Industrial Ltda.
InventorsYuri Alencar Marques, Abel de Oliveira
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Abstract
A lubricant composition comprising a polyoxypropylene polymer, the polyoxypropylene polymer having been prepared by polymerizing propylene oxide with an initiator containing a labile hydrogen in the presence of a double metal cyanide (DMC) catalyst, the polyoxypropylene polymer having a number average molecular weight ranging from 5,000 g/mol to 20,000 g/mol, a kinematic viscosity at 40° C. ranging from 1,200 to 20,000 cSt, a viscosity index equal to or greater than 230, and a degree of unsaturation equal to or less than 0.05 meq/g is provided. Further provided is a method for lubricating a mechanical device.
Claims11
A lubricant composition comprising a polyoxypropylene polymer, the polyoxypropylene polymer having been prepared by polymerizing propylene oxide with an initiator containing a labile hydrogen in the presence of a double metal cyanide (DMC) catalyst, the polyoxypropylene polymer having a number average molecular weight ranging from 5,000 g/mol to 20,000 g/mol, a kinematic viscosity at 40° C. ranging from 1,200 to 20,000 cSt, a viscosity index equal to or greater than 230, and a degree of unsaturation equal to or less than 0.05 meq/g.
Dependencies are inferred from the claim text.