Metal Working Fluid
OwnerDidier Busattoinventor
Life of this patent
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Abstract
The present invention relates to a metal working fluid comprising abase oil having a viscosity index of more than 110 according to ASTM D 2270 and a pour point of less than −40° C. according to ASTM D 97. Preferably the base oil is a Fischer-Tropsch derived oil. Preferably, the base oil has a kinematic viscosity at 100° C. of between 2 and 3 mm2/s, according to ASTM D 445. Further, the base oil preferably has a flash point of more than 170° C., preferably more than 175° C., most preferably more than 180° C., according to ASTM D 92.
Claims14
Metal working fluid comprising at least 80 wt % of a Fischer-Tropsch derived a base oil, the base oil having a viscosity index of more than 110 according to ASTM D 2270 and a pour point of less than −40° C. according to ASTM D 97, wherein the base-oil has a Noack Volatility at 150° C. of less than 2.
Metal working fluid according to one or more of the preceding claims, wherein the base oil has a kinematic viscosity at 100° C. of between 1-4 mm2/s.
Metal working fluid according to one or more of the preceding claims, wherein the base oil has a flash point of more than 170° C., according to ASTM D 92.
Metal working fluid according to one or more of the preceding claims, wherein the base oil has a Delta Distillation value (95 wt %-5 wt %) of less than 130° C., preferably less than 100° C., even more preferably less than 95° C., the distillation values being determined according to ASTM D 2888.
Metal working fluid according to one or more of the preceding claims, wherein the base oil has a Delta Distillation value (95 wt-5 wt %) of less than 100° C., the distillation values being determined according to ASTM D 2888.
Metal working fluid according to one or more of the preceding claims, wherein the base oil is obtained by
- (a) hydrocracking/hydroisomerisating a Fischer-Tropsch product,
- (b) separating the product of step (a) into at least one or more fuel fractions and the base oil fraction.
Metal working fluid according to one or more of the preceding claims, wherein the metal working fluid comprises one or more additives.
Use of the metal working fluid according to one or more of the preceding claims as a metal working fluid, in particular for high speed machining.
Dependencies are inferred from the claim text.