Base stock lubricant blends
AssigneeExxonMobil Research and Engineering Company
InventorsJames T. Carey, Angela S. Galiano-Roth, Thomas G. Dietz
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Abstract
A method of improving air release is disclosed. The method comprises obtaining a lubricant comprising two base stocks. The first base stock comprises a viscosity greater than 100 cSt, Kv100° C. The second base stock comprises a viscosity less than 10 cSt, Kv100° C. In addition, a lubricant formulation and method of blending a lubricant formulation is also disclosed. The lubricant formulation comprises at least two base stocks. At least 5 percent and no more than 90 percent of a first base stock comprising oil with a viscosity greater than 300 cSt, Kv100° C. At least 5 percent and no more than 90 percent of a second base stock comprising oil with a viscosity less than 10 cSt, Kv100° C.
Claims16
A lubricating oil formulation prepared from a blend of components comprised of:
- at least 47.10 wt % metallocene catalyzed PAO having a viscosity of greater than or equal to 150 cSt, Kv 100° C., based on total weight of the blend components of the formulation;
- not greater than 40.00 wt % PAO having viscosity of less than 10 cSt, Kv 100° C., based on total weight of the blend components of the formulation;
- and
- at least one cohase stock selected from the group consisting of alkylated naphthalene, alkylated benzene, alkylated diphenyloxide, alkylated diphenylsulfide, alkylated diphenylmethane, mono-basic esters, di-basic esters, and tri-basic esters,
- wherein the lubricating oil formulation has a viscosity greater than 3.5 cSt, Kv 100° C., and a viscosity index greater than 120, and
- wherein the lubricating oil formulation exhibits an air release time to 0.2% air of 17 minutes or less, according to ASTM D3427.
A lubricating oil formulation prepared from a blend of components comprised of:
- at least 47.10 wt % metallocene catalyzed PAO having a viscosity of greater than or equal to 150 cSt, Kv 100° C., based on total weight of the blend components of the formulation;
- at least 5 percent and not more than 30 percent PAO having a viscosity of less than 6 cSt, KV 100° C., based on total weight of the blend components of the formulation;
- and
- at least one cobase stock selected from the group consisting of alkylated naphthalene, alkylated benzene, alkylated diphenyloxide, alkylated diphenylsulfide, alkylated diphenylmethane, mono-basic esters, di-basic esters, and tri-basic esters,
- wherein the lubricating oil formulation has a viscosity greater than 3.5 cSt, Kv 100° C., and a viscosity index greater than 120.
A method of preparing a lubricating oil composition having reduced air entrainment, comprising blending together at least the following components:
- at least 47.10 svt % metallocene catalyzed PAO having a viscosity of greater than or equal to 150 cSt, Kv 100° C., based on total weight of the blend components of the formulation;
- not greater than 40.00 wt % PAO having a viscosity of less than 10 cSt, Kv 100° C., based on total weight of the blend components of the formulation;
- and
- at least one cobase stock selected from the group consisting of alkylated naphthalene, alkylated benzene, alkylated diphenyloxide, alkylated diphenyisulfide, alkylated diphenylmethane, mono-basic esters, di-basic esters, and tri-basic esters,
- wherein the lubrication oil composition exhibits an air release time to 0.2% air of 17 minutes or less, according to ASTM D3427.
A method of preparing a lubricating oil composition having reduced air entrainment, comprising blending together at least the following components:
- at least 47.10 wt % metallocene catalyzed PAO haying a viscosity of greater than or equal to 150 cSt, Kv 100° C., based on total weight of the blend components of the formulation;
- at least 5 percent and not more than 30 percent PAO having viscosity of less than 6 cSt, Kv 100° C., based on total weight of the blend components of the formulation;
- and
- at least one cobase stock selected from the group consisting of alkylated naphthalene. alkylated benzene, alkylated diphenyloxide, alkylated diphenylsulfide, alkylated diphenylmethane, mono-basic esters, di-basic esters, and tri-basic esters,
- wherein the lubrication oil composition exhibits an air release time to 0.2% air of 17 minutes or less, according to ASTM D3427.
Dependencies are inferred from the claim text.