Claims
- 1. An antiwear additive combination for use in a lubricant composition comprising:(a) an oil soluble or oil dispersible phosphorus-free organo-molybdenum compound selected from the group consisting of (I) molybdenum dithiocarbamate of the formula: wherein R1, R2, R3 and R4 each independently represent a hydrogen atom, a C1 to C20 alkyl group, a C6 to C20 cycloalkyl, aryl, alkylaryl or aralkyl group or a C3-C20 hydrocarbyl group containing an ester, ether, alcohol or carboxyl group and X1, X2, Y1, and Y2 each independently represent a sulfur or oxygen atom;(II) molybdenum carboxylate containing a C1 to C50 carboxylate group; (III) molybdenum xanthate of the formula: Mo2(ROCS2)4 wherein R is a C1 to C30 hydrocarbyl group, and mixtuires thereof, and(b) an ashless, sulfur-containing organo phosphorus compound selected from: (i) a phosphorothiolothionate of the formula wherein R5, R6 and R7 are each independently an unsubstituted branched or straight-chain hydrocarbyl group, or a substituted branched or straight chain hydrocarbyl group wherein the substitutents are selected from the group consisting of sulfur, oxygen or nitrogen containing functional group;(ii) a phosphorothionate of the formula: wherein R8, R9, and R10 are as defined for R5, R6, and R7 above; and(iii) a mixture of (i) and (ii); and (c) optionally, a zinc thiophosphate compound of the formula: wherein R11, R12, R13, and R14 are each independently a hydrogen atom, a C1 to C20 alkyl group, a C6 to C26 cycloalkyl, aryl, alkyl aryl or aralkyl group, or a C3 to C20 hydrocarbyl group containing an ester, ether, alcohol or carboxyl group.
- 2. The antiwear additive combination of claim 1 wherein R5 and R6 of the phosphorothiolothionate and R8 and R9 of the phosphorothionate are each a C1 to C30 alkyl group or a C6 to C30 cyclo alkyl, aryl, aralkyl and alkylaryl group and R7 of the phosphorothiolothionate and R10 of the phosphorothionate are each selected from the group consisting of C1 to C30 alkyl group, C6 to C30 cycloalkyl, aryl, aralkyl and alkylaryl group and C1 to C30 hydrocarbyl group containing one or more carboxylic acid, ester, ether, alcohol, amine, thioester, thioether, thio acid, thio alcohol group or an ammonium ion.
- 3. An additive concentrate comprising a carrier fluid, compatible with base oil, in which fluid the additive combination of claim 1 or 2 is dispersed and/or dissolved.
- 4. A lubricant composition comprising a base oil of viscosity of from 3 to 26 mm2/s at 100° C., and an anti wear additive combination according to claim 1 or 2.
- 5. The lubricant composition according to claim 4 wherein the amount of organo-molybdenum compound contained in the lubricant composition is such that the amount of molybdenum contained in the lubricant composition is from 0.001 to 0.5 wt %, based on the total weight of the lubricant composition and wherein the amount of ashless organo-phosphorus compound contained in the lubricant composition is such that the amount of phosphorus contained in the lubricant composition is form 0.001 to 0.3 wt %, based on the total weight of the lubricant composition.
- 6. The lubricant composition according to claim 4 wherein the ratio of organo-molybdenum compound to the ashless organo-phosphorus compound in the lubricant composition is such that the weight ratio of molybdenum to phosphorus in the lubricant composition is from 1:50 to 100:1.
- 7. The lubricant composition according to claim 4 wherein the amount of zinc thiophosphate compound and ashless organo-phosphorus compound contained in the lubricant composition is such that the amount of phosphorus contained in the lubricant composition is from 0.001 to 0.3 wt %, based on the total weight of the lubricant composition and wherein the ratio of organo-molybdenum compound to the ashless organo-phosphorus and zinc thiophosphate compounds in the lubricant composition is such that the weight ratio of molybdenum to phosphorus in the lubricant composition is from 1:50 to 100:1.
- 8. The lubricant composition according to claim 4 wherein the weight ratio of phosphorus derived from the ashless organo-phosphorus compound to phosphorus derived from the zinc thiophosphate compound is from 10:1 to 1:20.
- 9. The lubricant composition according to claim 5 wherein the ratio of organomolybdenum compound to the ashless organo-phosphorus compound in the lubricant composition is such that the weight ratio of molybdenum to phosphorus in the lubricant composition is form 1:50 to 100:1.
- 10. The lubricant composition according to claim 5 wherein the amount of zinc thiophosphate compound and ashless organo-phosphorus compound contained in the lubricant composition is such that the amount of phosphorus contained in the lubricant composition is from 0.001 to 0.3 wt %, based on the total weight of the lubricant composition and wherein the ratio of organo-molybdenum compound to the ashless organo-phosphorus and zinc thiophosphate compounds in the lubricant composition is such that the weight ratio of molybdenum to phosphorus in the lubricant composition is from 1:50 to 100:1.
- 11. A lubricant composition according to claim 8 wherein the amount of zinc thiophosphate compound and ashless organo-phosphorus compound contained in the lubricant composition is such that the amount of phosphorus contained in the lubricant composition is from 0.001 to 0.3 wt %, based on the total weight of the lubricant composition and wherein the ratio of organo-molybdenum compound to the ashless organo-phosphorus and zinc thiophosphate compounds in the lubricant composition is such that the weight ratio of molybdenum to phosphorus in the lubricant composition is from 1:50 to 100:1.
- 12. A method for improving the antiwear performance of a lubricating oil composition by adding to the lubricating oil composition an antiwear additive mixture comprising:(a) an oil soluble or oil dispersible phosphorus-free organo-molybdenum compound selected from the group consisting of (I) molybdenum dithiocarbamate of the formula: wherein R1, R2, R3 and R4 each independently represent a hydrogen atom, a C1 to C20 alkyl group, a C6 to C20 cycloalkyl, aryl, alkylaryl or aralkyl group or a C3-C20 hydrocarbyl group containing an ester, ether, alcohol or carboxyl group and X1, X2, Y1 and Y2 each independently represent a sulfur or oxygen atom;(II) molybdenum carboxylate containing a C1 to C50 carboxylate group; (III) molybdenum xanthate of the formula: Mo2(ROCS2)4 wherein R is a C1 to C30 hydrocarbyl group, and mixtures thereof, and(b) an ashless, sulfur-containing organo phosphorus compound selected from: (i) a phosphorothiolothionate of the formula wherein R5 and R6 are each a C1 to C30 alkyl group, or a C6 to C30 cycloalkyl, aryl, aralkyl or alkylaryl group, and R7 is a C1 to C30 alkyl group, a C6 to C30 cycloalkyl, aryl, aralkyl or alkyl aryl group or a C1 to C30 hydrocarbyl group containing one or more carboxylic acid, ester, alcohol, ether, thioester, thio ether, thio acid, thio alcohol or amine groups or an ammonium ion;(ii) a phosphorothionate of the formula: wherein R8 and R9 are as defined for R5 and R6 above and R10 is as defined for R7 above; and(iii) a mixture of (i) and (ii), and (c) optionally, a zinc thiophosphate compound of the formula: wherein R1, R12, R13, and R14 are each independently a hydrogen atom, a C1 to C20 alkyl group, a C6 to C26 cycloalkyl, aryl, alkyl aryl or aralkyl group, or a C3 to C20 hydrocarbyl group containing an ester, ether, alcohol or carboxyl group.
- 13. The method according to claim 12 wherein the amount of zinc thiophosphate compound and ashless organo-phosphorus compound added to the lubricant composition is such that the amount of phosphorus contained in the lubricant composition is form 0.001 to 0.3 wt %, based on the total weight of the lubricant composition and/or wherein the ratio of organomolybdenum compound to the ashless organo-phosphorus and zinc thiophosphate compounds added to the lubricant composition is such that the weight ratio of molybdenum to phosphorus in the lubricant composition is from 1:50 to 100:1.
- 14. The method of claim 12 wherein the weight ratio of phosphorus derived from the ashless organo-phosphoric compound to phosphorus derived from the zinc thiophosphate compound is fiom 10:1 to 1:20.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9401971 |
Sep 1994 |
GB |
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Parent Case Info
This application is a continuation-in-part of U.S. Ser. No. 08/605,222 filed Mar. 10, 1996, now abandoned.
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Dec 1986 |
EP |
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Entry |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
08/605222 |
Mar 1996 |
US |
Child |
08/990052 |
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US |