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US 12,305,142 B1Granted
Industrial lubricant
AssigneeAfton Chemical Corporation
InventorPaul Norris
Life of this patent
Estimating the term…
Abstract
A lubricating composition for a transmission, gearbox, or clutches including a mixture of compounds providing phosphorus and nitrogen to the fluids effective to achieve good wear, extreme pressure, friction, and copper corrosion.
Claims20
A lubricating composition comprising:
- (i) a base oil of lubricating viscosity;
- (ii) an amount of phosphorus provided from three phosphorus compounds including
- (iia) a first phosphorus compound including an ashless, dialkyl dithiophosphate of Formula I, or a salt thereof:
- wherein R1 and R2 are, independently, a C3 to C8 linear or branched alkyl group, and R3 is hydrogen or a methyl group, and wherein the first phosphorus compound provides about 5 to about 75 ppm of phosphorus to the lubricating composition;
- (iib) a second phosphorus compound including an amino alkyl phosphonate of Formula II or cyclic derivatives thereof:
- wherein R4 and R5 are, independently, a C1 to C4 linear or branched alkyl group, and R6 and R7 are, independently a C1 to C4 hydroxyalkyl group, wherein the second phosphorus compound provides about 10 to about 65 ppm of phosphorus to the lubricating composition;
- and
- (iic) a third phosphorus compound including a hydrocarbyl phosphonate monoester of Formula III:
- wherein R8 is a C12 to C30 hydrocarbyl group and R9 is a methyl group, an ethyl group, a propyl group, or an isopropyl group, wherein the third phosphorus compound provides about 5 to about 40 ppm of phosphorus to the lubricating composition;
- and
- wherein the first, the second, and the third phosphorus compounds provide a total of about 30 ppm to about 200 ppm phosphorus to the lubricating composition;
- (iii) an amount of nitrogen provided by a nitrogen-containing polyisobutylene succinimide with a number average molecular weight of the polyisobutylene substituent of about 500 to about 2500 g/mol when determined by gel permeation chromatography using polystyrene as a standard and providing about 30 ppm to about 105 ppm weight percent of nitrogen to the lubricating composition.
9 more elements
A method of lubricating a transmission, gearbox, and/or clutch, the method comprising:
- lubricating a transmission, a gearbox, and/or a clutch component with a lubricating composition;
- and
- wherein the lubricating composition includes
- (i) a base oil of lubricating viscosity;
- (ii) an amount of phosphorus provided from three phosphorus compounds including
- (iia) a first phosphorus compound including an ashless, dialkyl dithiophosphate of Formula I, or a salt thereof:
- wherein R1 and R2 are, independently, a C3 to C8 linear or branched alkyl group, and R3 is hydrogen or a methyl group, wherein the first phosphorus compound provides about 5 to about 75 ppm of phosphorus to the lubricating composition;
- (iib) a second phosphorus compound including an amino alkyl phosphonate of Formula II or cyclic derivatives thereof:
- wherein R4 and R5 are, independently, a C1 to C4 linear or branched alkyl group, and R6 and R7 are, independently a C1 to C4 hydroxyalkyl group, wherein the second phosphorus compound provides about 10 to about 65 ppm of phosphorus to the lubricating composition;
- and
- (iic) a third phosphorus compound including a hydrocarbyl phosphonate monoester of Formula III:
- wherein R8 is a C12 to C30 hydrocarbyl group and R9 is a methyl group, an ethyl group, a propyl group, or an isopropyl group, wherein the third phosphorus compound provides about 5 to about 40 ppm of phosphorus to the lubricating composition;
- and
- wherein the first, the second, and the third phosphorus compounds provide a total of about 30 ppm to about 200 ppm phosphorus to the lubricating composition;
- (iii) an amount of nitrogen provided by a nitrogen-containing polyisobutylene succinimide with a number average molecular weight of the polyisobutylene substituent of about 500 to about 2,500 g/mol when determined by gel permeation chromatography using polystyrene as a standard and providing about 30 ppm to about 105 ppm weight percent of nitrogen to the lubricating composition.
12 more elements
Dependencies are inferred from the claim text.