NANOSIZED PARTICLES OF MOLYBDENUM SULFIDE AND DERIVATIVES,METHOD FOR ITS PREPARATION AND USES THEREOF AS LUBRICANT ADDITIVE
First Claim
1. A lubricant composition comprising:
- A) a lubricant, and B) at least one molybdenum-containing compound in the form of surface-capped nanosized particles of the general formula
(Z)n(X—
R)m wherein;
Z is selected from the group consisting of MoS3, MoS2O, Na2MoS4, Na2MoS3O, (NH4)2MoS4, (NH4)2MoS3O, and hydrates thereof in the form of particles having dimensions in the range of from about 1 to about 100 nm;
(X—
R) is a surface-capping reagent selected from the group consisting of alkyl amines, dialkyl amines, trialkyl amines, carboxylic acids, dicarboxylic acids, carboxylic acid amides, dicarboxylic acid diamides, alicyclic imides, ammonium or alkali metal dialkyldithiocarbamates, divalent metal bis-dialkyldithiocarbamates, trivalent metal tris-dialkyldithiocarbamates, tetraalkyl thiuram disulfides, and derivatives thereof;
n is the number of molecules of Z in the particles;
m is an integer representing the amount of surface-capping, reagents relative to a single particle; and
the ratio of m to n is in the range of from about 1;
1 to about 10;
1.
10 Assignments
0 Petitions
Accused Products
Abstract
A lubricant composition is disclosed that comprises: (a) a lubricant and (b) at least one molybdenum-containing compound in the form of surface-capped nanosized particles of the general formula: (Z)n(X—R)m wherein Z is an inorganic moiety comprising molybdenum and sulfur in the form of particles having dimensions in the range of from about 1 to about 100 nm; (X—R) is a surface-capping reagent wherein R is a C4 to C20 straight or branched-chain alkyl or alkylated cycloalkyl radical or radicals and X is a functional group capable of specific sorption and/or chemical interaction with molybdenum/sulfur moiety; n is the number of molecules of Z in the particles; m is an integer representing the amount of surface-capping reagents relative to a single particle; and the ratio of m to n is in the range of from about 1:1 to about 10:1.
64 Citations
30 Claims
-
1. A lubricant composition comprising:
-
A) a lubricant, and B) at least one molybdenum-containing compound in the form of surface-capped nanosized particles of the general formula
(Z)n(X—
R)mwherein;
Z is selected from the group consisting of MoS3, MoS2O, Na2MoS4, Na2MoS3O, (NH4)2MoS4, (NH4)2MoS3O, and hydrates thereof in the form of particles having dimensions in the range of from about 1 to about 100 nm;
(X—
R) is a surface-capping reagent selected from the group consisting of alkyl amines, dialkyl amines, trialkyl amines, carboxylic acids, dicarboxylic acids, carboxylic acid amides, dicarboxylic acid diamides, alicyclic imides, ammonium or alkali metal dialkyldithiocarbamates, divalent metal bis-dialkyldithiocarbamates, trivalent metal tris-dialkyldithiocarbamates, tetraalkyl thiuram disulfides, and derivatives thereof;
n is the number of molecules of Z in the particles;
m is an integer representing the amount of surface-capping, reagents relative to a single particle; and
the ratio of m to n is in the range of from about 1;
1 to about 10;
1. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
2-3. -3. (Canceled)
-
13. A process for preparing a molybdenum-containing compound in the form of surface-capped nanosized particles of the general formula
(Z)n(X—- R)m
wherein;
Z is selected from the group consisting of MoS3, MoS2O, Na2MoS4, Na2MoS3O, (NH4)2MoS4, (NH4)2MoS3O and hydrates thereof in the form of particles having dimensions in the range of from about 1 to about 100 nm;
(X—
R) is a surface-capping reagent selected from the group consisting of alkyl amines, dialkyl amines, trialkyl amines, carboxylic acids, dicarboxylic acids, carboxylic acid amides, dicarboxylic acid diamides, alicyclic imides, ammonium or alkali metal dialkyldithiocarbamates, divalent metal bis-dialkyldithiocarbamates, trivalent metal tris-dialkyldithiocarbamates, tetraalkyl thiuram disulfides, and derivatives thereof;
n is the number of molecules of Z in the particles;
m is an integer representing the amount of surface-capping reagents relative to a single particle; and
the ratio of m to n is in the range of from about 1;
1 to about 10;
1;
wherein the process comprises the steps of A) creating a reversed microemulsion comprising a hydrocarbon-soluble surfactant solution in an organic solvent or solvent mixture and an aqueous solution of a water-soluble inorganic molybdenum (VI) compound;
B) if necessary to create a molybdenum/sulfur moiety, converting the water-soluble inorganic molybdenum (VI) compound into a thio-derivative by reaction with hydrogen sulfide;
C) adding a surfactant that chemically interacts with and/or adsorbs on the molybdenum/sulfur moiety;
D) removing water and the organic solvent(s) from the microemulsion and extracting the molybdenum/sulfur moiety-containing products thereof in the form of surface-capped nanosized particles with a suitable organic solvent; and
E) removing said suitable organic solvent. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
R1R2R3Nwherein R1, R2, and R3 are independently selected from the group consisting of hydrogen, straight or branched-chain C1-C28 alkyl, C6-C34 alkylaryl, and aryl. -
25. The process of claim 23 wherein the carboxylic acids, and carboxylic acid amides are of the formula
-
26. The process of claim 23 wherein the alicyclic imides are of the formula
-
27. The process of claim 23 wherein the alkali metal dialkyldithiocarbamates are of the formula
-
28. The process of claim 23 wherein the divalent metal bis-dialkyldithiocarbamates are of the formula
-
29. The process of claim 23 wherein the trivalent metal tris-dialkyldithiocarbamates are of the formula
-
30. The process of claim 23 wherein the thiuram disulfides are of the formula
- R)m
-
14. (Canceled)
Specification