Constant velocity universal joint lubricating grease composition containing organic ammonium phosphate and organic molybdenum

Abstract

The invention relates to the technical field of lubricating oil, in particular to a constant velocity universal joint lubricating grease composition containing organic ammonium phosphate and organic molybdenum. The lubricating grease composition comprises the following components: a, at least one base oil; b. At least one thickening agent; c. At least one organic ammonium phosphate salt; d. At least one organic molybdenum; and e. At least one organic zinc phosphate. The lubricating grease formed by the invention provides excellent NVH (Noise Vibration and Harshness) performance and transmission efficiency for the three-pin universal joint. And the purpose of reducing carbon emission is achieved. And meanwhile, the purposes of reducing automobile driving noise and prolonging the service life are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of lubricating oils, and in particular to a constant velocity joint lubricating grease composition comprising an organic amine phosphate and organic molybdenum. Background Art

[0002] Constant velocity joint: a constant velocity drive shaft for new energy cars and motor vehicles. Its types include tripod joints, ball-type fixed joints, ball-type movable joints, etc. Among them, tripod-type CV joints are mostly used on the inside (internal CV joints). The movement of the components in the CV joint is complex, combining rolling and sliding. When the joint is subjected to torque, the components are loaded together, which not only causes wear on the contact surfaces of the components, but also causes rolling contact fatigue and significant friction between the surfaces.

[0003] The constant velocity joint also has a sealing boot of elastomeric material, usually in the shape of a bellows, which is attached to the outside of the CV joint at one end and to the interconnecting or output shaft of the CV joint at the other end. The sealing boot keeps grease in the joint and keeps out dirt and moisture.

[0004] Not only must the grease reduce wear and friction and prevent premature rolling contact fatigue in the CV joint, it must also be compatible with the elastomeric material the boot is made of. Otherwise, the boot material will degrade, leading to premature boot failure, which in turn will cause the grease to escape and ultimately cause the CV joint to fail.

[0005] The synergistic effect of friction reduction and anti-wear produced by organic molybdenum and ZDTP (zinc dithiophosphate) is a well-known scientific phenomenon. This synergistic effect has been widely used in the formulation of lubricating products. However, in the existing formulations, either the ACFG performance is good but the sheath compatibility is poor, or the ACFG performance is poor but the sheath compatibility is good. It is not possible to solve the above problems at the same time. Summary of the invention

[0006] In view of the shortcomings of the prior art described above, the object of the present invention is to provide an excellent low-energy consumption, noise-reducing constant velocity joint lubricating grease composition having an organic phosphate amine salt and organic molybdenum, which is mainly used for constant velocity joints (CV joints) in the transmission systems of new energy vehicles and traditional fuel vehicles, especially three-pin universal joints and / or ball joints.

[0007] The technical solution of the present invention is:

[0008] The present invention provides a lubricating grease composition for a constant velocity universal joint, the lubricating grease composition comprising the following components:

[0009] a. at least one base oil;

[0010] b. at least one thickener;

[0011] c. at least one organophosphate amine salt;

[0012] d. at least one organic molybdenum;

[0013] e. At least one organozinc phosphate.

[0014] The present invention also provides a method for preparing a lubricating grease composition for a constant velocity joint, the preparation method comprising: mixing at least one base oil, at least one thickener, at least one organic phosphate amine salt, at least one organic molybdenum, and at least one organic zinc phosphate.

[0015] The present invention also provides the use of the lubricating grease composition for constant velocity joints as described above in the present invention and / or the lubricating grease composition for constant velocity joints prepared by the preparation method described above in the present invention.

[0016] The present invention also provides a constant velocity universal joint (CV joint), comprising the lubricating grease composition for a constant velocity universal joint as described above in the present invention and / or the lubricating grease composition for a constant velocity universal joint prepared by the preparation method described above in the present invention.

[0017] By adopting the above technical solution, the beneficial effects of the present invention are:

[0018] The present invention finds that the organic phosphate amine salt produces a synergistic effect with organic molybdenum and organic zinc phosphate, which greatly improves the extreme pressure performance of lubricating grease. At the same time, it provides excellent friction reduction and anti-wear performance, as well as good compatibility with sealing materials. The performance of the organic phosphate amine salt is better than that of ordinary organic phosphate esters, organic thiophosphate esters and organic sulfur extreme pressure additives.

[0019] The lubricating grease formed by the present invention provides excellent NVH performance and transmission efficiency for the three-pin universal joint. It serves the purpose of reducing carbon emissions. It also serves the purpose of reducing automobile driving noise and increasing service life. Research work shows that in the HT1 life test, efficiency test and ACFG performance test, the S1TG lubricating grease is superior to the current commercial standard three-pin universal joint lubricating grease of GKN. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Shown are the LTFS test data graphs of Examples A1 to A3 and Comparative Examples B1 to B5 of the present invention.

[0021] Figure 2 Shown are the LTFS test data graphs of Example A1 of the present invention and Comparative Examples B1 and B2.

[0022] Figure 3 Shown is the ACFG test data chart of comparative examples B1 and B2 of the present invention.

[0023] Figure 4 The friction coefficient diagrams of Examples A1 to A3 and Comparative Examples B1 to B5 of the present invention are shown.

[0024] Figure 5 Shown is the ACFG test data diagram of Example A1 of the present invention and Comparative Example B1.

[0025] Figure 6 The extreme pressure load diagrams of Examples A1 to A3 of the present invention and Comparative Examples B1 to B5 are shown. DETAILED DESCRIPTION

[0026] Hereinafter, embodiments of the lubricating grease composition for constant velocity joints and its application provided by the present invention will be described in detail.

[0027] The "range" disclosed in the present application is defined in the form of a lower limit and an upper limit, and a given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of the particular range. The range defined in this way can be inclusive or exclusive of the end values, and can be arbitrarily combined, that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 60 to 120 and 80 to 110 is listed for a particular parameter, it is understood that a range of 60 to 110 and 80 to 120 is also expected. In addition, if the minimum range values ​​1 and 2 are listed, and if the maximum range values ​​3, 4 and 5 are listed, the following ranges can all be expected: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4 and 2 to 5. In the present application, unless otherwise specified, the numerical range "a to b" represents an abbreviation of any real number combination between a and b, where a and b are both real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" are listed in this document, and "0-5" is just an abbreviation of these numerical combinations. In addition, when a parameter is expressed as an integer ≥ 2, it is equivalent to disclosing that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0028] In this application, "at least one" means one or more. For example, one, two, three, four, five, etc.

[0029] The synergistic effect of organic molybdenum and ZDTP (zinc dithiophosphate) in reducing friction and anti-wear is a well-known scientific phenomenon. This synergistic effect has been widely used in the formulation of lubricating products.

[0030] Organophosphorus, such as organophosphates and thiophosphates, are used in the formulation of lubricating greases to improve the extreme pressure and anti-wear properties of lubricating greases. The present invention has found that organophosphate amine salts produce a synergistic effect with organomolybdenum and organozinc phosphate, which greatly improves the extreme pressure properties of lubricating greases. At the same time, it provides excellent friction reduction and anti-wear properties, as well as good compatibility with sealing materials. The performance of organophosphate amine salts is better than that of ordinary organophosphate esters, organothiophosphate esters and organosulfur extreme pressure additives.

[0031] The present invention provides excellent NVH performance and transmission efficiency for three-pin universal joints by increasing and improving the lubricating oil components to form a lubricating grease, which can meet the requirements of new energy vehicles and reduce carbon emissions. At the same time, it can reduce the driving noise of the car and increase the service life. After assembly, it can have the same life as the car. Improve the energy density of the lubricating grease, high temperature, high load (requirements of new energy vehicles), and high speed. Research work has shown that in the HT1 life test, efficiency test and ACFG performance test, S1TG lubricating grease is better than GKN's current commercial standard three-pin universal joint lubricating grease. On this basis, this application is completed.

[0032] [Lubricating grease composition for constant velocity joints]

[0033] The present invention provides a lubricating grease composition for a constant velocity joint with enhanced friction reduction, anti-wear and extreme pressure resistance through the synergistic effect of an organic phosphate amine salt, organic molybdenum and organic zinc phosphate. The lubricating grease composition comprises the following components:

[0034] a. at least one base oil;

[0035] b. at least one thickener;

[0036] c. at least one organophosphate amine salt;

[0037] d. at least one organic molybdenum;

[0038] e. At least one organozinc phosphate.

[0039] Herein, at least one means one or more, for example, it can be one, two, three, four, etc.

[0040] In the lubricating grease composition for constant velocity joints provided by the present invention, the lubricating grease composition comprises 60 wt % to 95 wt % of at least one base oil, and the wt % refers to the total amount of the lubricating grease composition. It can be 65 wt % to 90 wt %, 70 wt % to 90 wt %, 78.5 wt % to 87.5 wt %, 78.5 wt % to 82.5 wt %, 82.5 wt % to 87.5 wt %, 85 wt % to 86 wt %, etc. In each case, it refers to the total amount of the lubricating grease composition according to the present invention.

[0041] The at least one base oil is selected from one or more of poly-α-olefins, metal poly-α-olefins, naphthenic oils, paraffinic oils, polyether polyols, synthetic organic esters. As the at least one base oil according to the present invention, any other kind of base oil may be used, in particular a blend of mineral oils, a blend of synthetic oils or a blend of a mixture of mineral oils and synthetic oils. The kinematic viscosity of the at least one base oil at 40° C. should preferably be between 32 and 250 mm 2 / sec and the kinematic viscosity at 100 ° C is between 5 and 25 mm 2 / sec. The mineral oil is preferably selected from at least one naphthenic oil and / or at least one paraffinic oil. The synthetic oil that can be used in the present invention is selected from at least one paraffinic oil and / or at least one naphthenic oil.

[0042] If poly-α-olefin is present in the base oil, the poly-α-olefin is preferably 1-dodecene oligomer, 1-decene oligomer, 1-octene or a mixture thereof, and even more preferably a copolymer comprising 1-octene, poly-1-decene oligomer, poly-1-dodecene oligomer or a mixture thereof, wherein the poly-1-decene oligomer and the poly-1-dodecene oligomer may be dimers, trimers, tetramers, pentamers or higher polymers. Preferably, a PAO (poly-α-olefin) having a kinematic viscosity (ASTM D445) at 100° C. in the range of 2 to 150 centistokes is selected.

[0043] Metal poly-α-olefins, metallocene PAOs, have viscosities in the same range as the above-mentioned PAO viscosity ranges.

[0044] The naphthenic oil selected for at least one base oil preferably has a kinematic viscosity at 40° C. between 3 and 370 mm 2 / second, more preferably in the range of 20 to 150 mm 2 / sec. Density (measured according to ASTM D1250) at 15.6°C is 0.9 to 1.0 g / cm 3 .

[0045] The paraffinic base oil present in at least one base oil is preferably a chain saturated alkane, a branched saturated alkane and a cyclic saturated alkane selected from polyolefins, hydroisomerized Fischer-Tropsch waxes and Fischer-Tropsch oligomerized olefins, preferably an isoparaffin, a cycloparaffin containing a monocyclic and / or polycyclic structure. Preferably, the paraffinic base oil has a carbonyl content of 9 mm at 40°C. 2 / second to 170mm 2 The kinematic viscosity is in the range of 50 mm / s at 40°C. 2 / sec to 130mm 2 / Kinematic viscosity in seconds.

[0046] The viscosity range of polyether polyols is equivalent to the above-mentioned PAO viscosity range.

[0047] The organic synthetic ester is preferably a dicarboxylic acid derivative having a subunit based on a fatty alcohol. Preferably, the fatty alcohol has a primary carbon chain, a linear carbon chain or a branched carbon chain of 2 to 20 carbon atoms. Preferably, the organic synthetic ester is selected from sebacic acid-bis(2-ethylhexyl) ("dioctyl sebacate" (DOS)), adipic acid-bis-(2-ethylhexyl) ("dioctyl adipate" (DOA)), dioctyl phthalate (DOP) and / or azelaic acid-bis(2-ethylhexyl) ("dioctyl azelate (DOZ)). The kinematic viscosity (ASTM D445) at 100° C. is selected to be 2 to 50 centistokes.

[0048] Further, at least one base oil may include at least one paraffinic base oil in an amount of 30% to 85% by weight, more preferably 30% to 75% by weight, 35% to 75% by weight, even more preferably 37% to 72% by weight, in each case relative to the total amount of the base oil. In addition, at least one base oil may include at least one naphthenic oil in an amount of 15% to 80% by weight, more preferably 15% to 75% by weight, even more preferably 15% to 70% by weight, in each case relative to the total amount of the base oil. The term base oil used in the present invention is understood to be a base oil composition consisting of various components, in particular, the base oil is one or more of poly-α-olefins, metal poly-α-olefins, naphthenic oils, paraffinic base oils, polyether polyols, and synthetic organic esters. Preferably, the at least one base oil comprises an amount of 30% to 85% by weight, further preferably 35% to 75% by weight, even more preferably 37% to 72% by weight, of at least one paraffinic oil, and an amount of 15% to 70% by weight, further preferably 15% to 65% by weight, even more preferably 15% to 62% by weight, of at least one naphthenic oil, in each case relative to the total amount of the base oil.

[0049] In the lubricating grease composition for constant velocity joints provided by the present invention, the lubricating grease composition comprises 2 wt % to 30 wt % of at least one thickener, wherein the wt % refers to the total amount of the lubricating grease composition. It may be 5 wt % to 25 wt %, 7 wt % to 20 wt %, 7 wt % to 16 wt %, 8 wt % to 10 wt %, etc. In each case, it refers to the total amount of the lubricating grease composition according to the present invention.

[0050] The at least one thickener is selected from one or more of at least one urea thickener, at least one lithium soap, at least one lithium complex soap, at least one sodium-based grease, a complex sodium-based grease, at least one calcium soap, and a complex calcium-based soap.

[0051] The urea thickener may be selected from diurea compounds and polyurea compounds. For example, the diurea compound is selected from the group obtained by the reaction of a monoamine with a diisocyanate compound such as phenylene diisocyanate, diphenyl diisocyanate, phenylene diisocyanate, diphenylmethane diisocyanate, octadecane diisocyanate, decane diisocyanate and hexane diisocyanate, examples of such monoamines being octylamine, dodecylamine, hexadecylamine, octadecylamine, oleylamine, aniline, p-toluidine and cyclohexylamine; the polyurea compound is selected from the group obtained by the reaction of a diamine with a diisocyanate compound such as the above diisocyanate, and the diamine includes ethylenediamine, propylenediamine, butanediamine, hexamethylenediamine, octyldiamine, phenylenediamine, toluenediamine and xylenediamine; or the urea thickener is selected from the group obtained by the reaction of an arylamine such as p-toluidine or aniline, cyclohexylamine or a mixture thereof with a diisocyanate. The aryl group of the diurea compound, if present, preferably consists of 6 or 7 carbon atoms. However, it is also possible to use mixtures of all the abovementioned thickeners, such as lithium soap thickeners and urea thickeners.

[0052] Lithium soap is the reaction product of at least one fatty acid with lithium hydroxide. Alternatively, the thickener may be a simple lithium formed from stearic acid, 12-hydroxystearic acid, hydrogenated castor oil or from other similar fatty acids or mixtures thereof or methyl esters of these acids. Alternatively, lithium complex soaps may be used, for example, from mixtures of long chain fatty acids with complexing agents such as borates of one or more dicarboxylic acids. The use of lithium complex soaps allows the lubricating grease composition according to the invention to be operated at temperatures up to about 180°C, whereas with simple lithium soaps, the lubricating grease composition would only be operable at temperatures up to about 120°C.

[0053] The sodium grease is the reaction product of at least one fatty acid with sodium hydroxide. Alternatively, the thickener may be a simple sodium formed from stearic acid, 12-hydroxystearic acid, hydrogenated castor oil or from other similar fatty acids or mixtures thereof or methyl esters of these acids. Alternatively, a complex sodium grease may be used, for example, formed from a mixture of long chain fatty acids with a complexing agent such as a borate of one or more dicarboxylic acids. The use of a complex sodium grease allows the lubricating grease composition according to the invention to be operated at temperatures up to about 180°C, whereas with a simple sodium grease the lubricating grease composition would only be operable at temperatures up to about 120°C.

[0054] Calcium soap is the reaction product of at least one fatty acid with sodium hydroxide. Alternatively, the thickener may be a simple calcium formed from stearic acid, 12-hydroxystearic acid, hydrogenated castor oil or from other similar fatty acids or mixtures thereof or methyl esters of these acids. Alternatively, complex calcium-based soaps may be used, for example, from mixtures of long-chain fatty acids with complexing agents such as borates of one or more dicarboxylic acids. The use of complex calcium-based soaps allows the lubricating grease composition according to the invention to be operated at temperatures up to about 180°C, whereas with simple calcium soaps, the lubricating grease composition would only be operable at temperatures up to about 120°C.

[0055] Mixtures of all of the above thickeners such as lithium soaps and urea thickeners may also be used.

[0056] The present invention finds that the organic phosphate amine salt produces a synergistic effect with organic molybdenum and organic zinc phosphate, which greatly improves the extreme pressure performance of lubricating grease. At the same time, it provides excellent friction reduction and anti-wear performance, as well as good compatibility with sealing materials. The performance of the organic phosphate amine salt is better than that of ordinary organic phosphate esters, organic thiophosphate esters and organic sulfur extreme pressure additives.

[0057] In the lubricating grease composition for constant velocity joints provided by the present invention, the total amount of the at least one organic molybdenum, the at least one organic phosphate amine salt and the at least one organic zinc phosphate is 0.50 wt % to 15.0 wt % of the total amount of the lubricating grease composition, and can be 0.50 wt % to 3.5 wt %, 3.50 wt % to 15.0 wt %, 3.50 wt % to 5.0 wt %, 5.0 wt % to 10.0 wt %, 10.0 wt % to 15.0 wt %, etc.

[0058] In the lubricating grease composition for constant velocity joints provided by the present invention, the lubricating grease composition comprises 0.10 wt % to 6.0 wt % of at least one or more organic molybdenums, wherein the wt % refers to the total amount of the lubricating grease composition, which may be 0.10 wt % to 2.5 wt %, 2.5 wt % to 6.0 wt %, 0.10 wt % to 1.0 wt %, 1.0 wt % to 2.5 wt %, 2.5 wt % to 4.0 wt %, 4.0 wt % to 5.0 wt % or 5.0 wt % to 6.0 wt %, etc.

[0059] The at least one organic molybdenum is selected from one or more of dithiophosphate molybdenum, dithiocarbamate molybdenum, phosphorus-free and sulfur-free organic molybdenum, etc. Organic molybdenum can play the role of friction reduction, anti-wear and anti-oxidation. It can be selected as a combination of dithiophosphate molybdenum and dithiocarbamate molybdenum. Further optionally, the amount of dithiophosphate molybdenum and dithiocarbamate molybdenum is 1:1. For example, dithiophosphate molybdenum can be dialkyl dithiophosphate molybdenum; dithiocarbamate molybdenum can be dialkyl dithiocarbamate molybdenum.

[0060] In the lubricating grease composition for constant velocity joints provided by the present invention, the lubricating grease composition comprises 0.10 wt % to 3.0 wt % of at least one organic phosphate amine salt, wherein the wt % refers to the total amount of the lubricating grease composition, and may be 0.10 wt % to 1.0 wt %, 1.0 wt % to 3.0 wt %, 1.0 wt % to 2.0 wt %, 2.0 wt % to 3.0 wt %, etc.

[0061] The at least one organic phosphoric acid amine salt is selected from one or more of organic phosphorus alkylamine salts and organic phosphorus diimide salts.

[0062] Furthermore, the alkylamine carbon chain in the at least one organic phosphorus alkylamine salt is a C4 to C24 alkyl group, for example, C12, C18, etc.

[0063] Furthermore, the organic phosphorus diimide: acyl groups of different alkyl chains. The diimide in the at least one organic phosphorus diimide salt is one or more of polyisobutylene succinimide and alkyl diamide; wherein the alkyl carbon chain of the alkyl diamide is an alkyl group of C4 to C24. For example, it can be C4, C8, C12, etc.

[0064] Furthermore, the organic phosphoric acid amine salt may also be an organic phosphoric acid amine salt product to which an alkylamine and a diamide are simultaneously linked.

[0065] In the lubricating grease composition for constant velocity joints provided by the present invention, the lubricating grease composition comprises 0.10 wt % to 3.0 wt % of at least one organic zinc phosphate, wherein the wt % refers to the total amount of the lubricating grease composition, and may be 0.10 wt % to 1.0 wt %, 1.0 wt % to 3.0 wt %, 1.0 wt % to 2.0 wt %, 2.0 wt % to 3.0 wt %, etc.

[0066] The at least one organic zinc phosphate is selected from one or more of primary zinc dithiophosphate, secondary zinc dithiophosphate, and tertiary zinc dithiophosphate. The organic zinc phosphate may be, for example, zinc dialkyl dithiophosphate.

[0067] In this application, the organic zinc phosphate is an anti-wear additive and also an antioxidant.

[0068] In the lubricating grease composition for constant velocity joints provided by the present invention, the lubricating grease composition further comprises 0.1 wt% to 2.0 wt% of at least one antioxidant, wherein the wt% refers to the total amount of the lubricating grease composition. The at least one antioxidant is used to prevent oxidation-related degradation of the lubricating grease composition and prolong the life of the lubricating grease composition, thereby prolonging the life of the universal joint. It can be selected from 0.1 wt% to 1.0 wt%, 1.0 wt% to 2.0 wt%, 0.1 wt% to 0.5 wt%, 0.5 wt% to 1.0 wt%, 1.0 wt% to 1.5 wt%, 1.5 wt% to 2.0 wt%, etc. In each case, it refers to the total amount of the lubricating grease composition according to the present invention.

[0069] Furthermore, the antioxidant is, for example, a phenolic antioxidant and / or an amine-containing phenolic antioxidant, for example, octyl / butyl diphenylamine.

[0070] In a preferred embodiment of the present invention, the lubricating grease composition comprises, by weight percentage, 60 wt % to 95 wt % of at least one base oil, 2 wt % to 30 wt % of at least one thickener, 0.10 wt % to 3.0 wt % of at least one organic phosphoric acid amine salt, 0.10 wt % to 5.0 wt % of organic molybdenum, 0.10 wt % to 3.0 wt % of at least one organic zinc phosphate, and 0.10 wt % to 2.0 wt % of at least one antioxidant, wherein the weight % in each case refers to the total amount of the lubricating grease composition.

[0071] [Preparation method of lubricating grease composition for constant velocity joints]

[0072] The present invention also provides a method for preparing the lubricating grease composition for constant velocity joints of the present invention: the preparation method comprises: mixing at least one base oil, at least one thickener, at least one organic phosphate amine salt, at least one organic molybdenum, and at least one organic zinc phosphate.

[0073] The amount of each component and its specific selection are as described in the first aspect of the present invention, "lubricating grease composition for constant velocity joints".

[0074]

use

[0075] The present invention also provides the use of the lubricating grease composition for constant velocity joints of the present invention and / or the lubricating grease composition for constant velocity joints prepared by the preparation method of the present invention in constant velocity joints.

[0076] The constant velocity universal joint is a constant velocity universal joint specially used for new energy vehicles and traditional fuel vehicles.

[0077] Alternatively, the constant velocity universal joint is a tripod universal joint or a ball universal joint.

[0078]

Constant velocity joint

[0079] The present invention also provides a constant velocity universal joint, comprising the lubricating grease composition for a constant velocity universal joint as described above in the present invention and / or the lubricating grease composition for a constant velocity universal joint prepared by the preparation method described above in the present invention.

[0080] The beneficial effects of the present invention are further illustrated below in conjunction with embodiments.

[0081] In order to make the invention purpose, technical scheme and beneficial technical effect of the present invention clearer, the present invention is further described in detail below in conjunction with examples. However, it should be understood that the examples of the present invention are only for explaining the present invention, not for limiting the present invention, and the examples of the present invention are not limited to the examples given in the specification. The specific experimental conditions or operating conditions not specified in the examples are made under conventional conditions, or are made under the conditions recommended by the material supplier.

[0082] In addition, it should be understood that one or more method steps mentioned in the present invention do not exclude the existence of other method steps before or after the combination step or the insertion of other method steps between these explicitly mentioned steps, unless otherwise specified; it should also be understood that the combination connection relationship between one or more devices / apparatuses mentioned in the present invention does not exclude the existence of other devices / apparatuses before or after the combination device / apparatus or the insertion of other devices / apparatuses between these explicitly mentioned two devices / apparatuses, unless otherwise specified. Moreover, unless otherwise specified, the numbering of each method step is only a convenient tool for identifying each method step, and is not intended to limit the order of arrangement of each method step or the scope of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the present invention without substantially changing the technical content.

[0083] In the following examples, unless otherwise specified, various raw materials of the present invention can be purchased from the market or prepared according to conventional methods in the art.

[0084] Example A1

[0085] A lubricating grease composition was prepared by mixing 85.5 wt % of base oil, 9 wt % of thickener, 2.5 wt % of organic molybdenum, 1.0 wt % of organic zinc phosphate, 1.0 wt % of organic phosphate amine salt, and 1.0 wt % of antioxidant.

[0086] Example A2

[0087] A lubricating grease composition was prepared by mixing 78.5 wt % of base oil, 16 wt % of thickener, 2.5 wt % of organic molybdenum, 1.0 wt % of organic zinc phosphate, 1.0 wt % of organic phosphate amine salt, and 1.0 wt % of antioxidant.

[0088] Example A3

[0089] A lubricating grease composition was prepared by mixing 87.5 wt % of base oil, 7 wt % of thickener, 2.5 wt % of organic molybdenum, 1.0 wt % of organic zinc phosphate, 1.0 wt % of organic phosphate amine salt, and 1.0 wt % of antioxidant.

[0090] Comparative Example B1

[0091] A lubricating grease composition was prepared by mixing 87 wt % of a base oil, 7.5 wt % of a thickener, 4.0 wt % of organic molybdenum, 1.0 wt % of organic zinc phosphate, and 0.5 wt % of an antioxidant.

[0092] Comparative Example B2

[0093] A lubricating grease composition was prepared by mixing 88.5 wt % of a base oil, 7 wt % of a thickener, 3.0 wt % of organic molybdenum, 1.0 wt % of organic zinc phosphate, and 0.5 wt % of an antioxidant.

[0094] Comparative Example B3

[0095] A lubricating grease composition was prepared by mixing 87.5 wt % of a base oil, 8 wt % of a thickener, 2.5 wt % of organic molybdenum, 1.0 wt % of organic zinc phosphate, and 1.0 wt % of an antioxidant.

[0096] Comparative Example B4

[0097] A lubricating grease composition was prepared by mixing 86.5 wt % of base oil, 8 wt % of thickener, 2.5 wt % of organic molybdenum, 1.0 wt % of organic zinc phosphate, 1.0 wt % of organic phosphate (trioctyl phosphate), and 1.0 wt % of antioxidant.

[0098] Comparative Example B5

[0099] A lubricating grease composition was prepared by mixing 86.5 wt% of base oil, 8 wt% of thickener, 2.5 wt% of organic molybdenum, 1.0 wt% of organic zinc phosphate, 1.0 wt% of organic sulfur (isobutylene sulfide), and 1.0 wt% of antioxidant.

[0100] In the above embodiments and comparative examples,

[0101] The base grease (thickener + base oil) is provided by the lubricant manufacturer. The base oil used is a combination of naphthenic oil and paraffin oil (the mass ratio of naphthenic oil to paraffin oil is 7:3). The naphthenic oil model is LT130, Sinopec Lubricant Co., Ltd.; the paraffin oil model is 500SN, Liaoning Haihua Technology Co., Ltd. Polyurea thickener (Liaoning Haihua Technology Co., Ltd.), complex calcium-based soap thickener (Sinopec Lubricant Co., Ltd.), lithium-based soap thickener (Sinopec Lubricant Co., Ltd.)

[0102] Organic sulfur uses isobutylene sulfide (Jinzhou Kangtai Chemical Co., Ltd.)

[0103] The organic molybdenum used was molybdenum dialkyl dithiophosphate (Pacific Union (Beijing) Petrochemical Co., Ltd.) and molybdenum dialkyl dithiocarbamate (Pacific Union (Beijing) Petrochemical Co., Ltd.), and the mass ratio of molybdenum dialkyl dithiophosphate to molybdenum dialkyl dithiocarbamate was 1:1.

[0104] Organic phosphate (trioctyl phosphate) (Hefei Tianjian Chemical Co., Ltd.)

[0105] Organic zinc phosphate uses zinc dialkyl dithiophosphate (Jinzhou Kangtai Chemical Co., Ltd.)

[0106] Octylated and butylated diphenylamine (L57 from Vanderbilt (Beijing) Trading Co., Ltd.) was used as the antioxidant.

[0107] Organic phosphate amine salt (QT301 of Chaohua Technology (Foshan) Co., Ltd.)

[0108] Table 1 Composition and performance test of each embodiment and comparative example

[0109]

[0110]

[0111] B1: currently used grease; B2: currently used grease; A: formulation of the present invention; B: comparative formulation; O: represents standard performance; -: represents performance degradation; +: represents performance improvement; ND: not tested

[0112] In Table 1:

[0113] Table 2

[0114]

[0115]

[0116]

[0117] The relationship between LTFS test data and ACFG test data in the SGI tripod section:

[0118] like Figure 1 It can be seen that Example A1 has the best effect. Examples A2 and A3 did not reach a low friction coefficient after running-in. The final friction coefficients of Examples A1-A3 were all lower than those of Comparative Examples B1 and B2. As shown in Table 1, the extreme pressure performance of the present application is good (through the synergistic effect of the organic ammonium phosphate salt with organic molybdenum and organic zinc phosphate).

[0119] like Figure 1 and 2 , Example B1 needs a certain amount of time to run in, and the effect is not optimal. However, the ACFG data meets the requirements (such as Figure 3 ).

[0120] like Figure 1 and 2 , Comparative Example B2 requires a longer period of running-in. ACFG data does not meet the requirements (such as Figure 3 ).

[0121] like Figure 1 , the friction coefficient of comparative example B5 is not good. As shown in Table 1, the extreme pressure performance of B5 is similar to that of B1 and B2.

[0122] like Figure 1 , the friction coefficient of comparative example B3 is good. However, as shown in Table 1, the extreme pressure performance of comparative example B3 is not good.

[0123] like Figure 1 , Comparative Example B4 is worse than B1 and B2. As shown in Table 1, the extreme pressure performance of organic phosphate ester is not as good as that of organic ammonium phosphate.

[0124] In addition, if Figure 4 , compared with the friction coefficient at 55 minutes:

[0125] Embodiment A1 is the best.

[0126] Comparative Examples B1 and B2 are at the same level.

[0127] Comparative Examples B3 and B4 have good friction coefficients, but their extreme pressure performance is not as good as that of the patented samples.

[0128] Comparative Example B5 is higher than the expected value. Only adding organic sulfur produces an increase in the friction coefficient, which is a negative effect.

[0129] Laboratory extreme pressure test data and AAR tripod high torque life test data

[0130] Among them, the organophosphate amine salt improves the extreme pressure performance. It has better performance than the commonly used organophosphate esters and organosulfur.

[0131] Organic molybdenum and organic phosphate amine salts produce a synergistic effect (Sample A). The pressure in the universal joint is very high, and improving the extreme pressure performance helps to increase the life of the universal joint, such as Figure 6 , the life of Example A1 is better than that of Comparative Example B1.

[0132] Table 3

[0133]

[0134] Table 4 Sheath compatibility test

[0135]

[0136]

[0137] It can be seen from the sheath compatibility test data in Table 4 that the smaller the change in tensile strength, the longer the sheath life.

[0138] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0139] The above is only a preferred embodiment of the present invention, and is not any formal or substantial limitation of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the method of the present invention, and these improvements and supplements should also be regarded as the protection scope of the present invention. Any technician familiar with this profession, without departing from the spirit and scope of the present invention, can make some changes, modifications and evolutions of the technical content disclosed above, which are equivalent embodiments of the present invention; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A lubricating grease composition for a constant velocity joint, characterized in that: The components include: a. at least one base oil; b. at least one thickener; c. at least one organophosphate amine salt; d. at least one organic molybdenum; e. At least one organozinc phosphate.

2. The lubricating grease composition for constant velocity joints according to claim 1, characterized in that: The total amount of the at least one organic molybdenum, the at least one organic phosphate amine salt and the at least one organic zinc phosphate is 0.50 wt % to 15.0 wt % of the total amount of the lubricating grease composition.

3. The lubricating grease composition for constant velocity joints according to claim 1 or 2, characterized in that: Also includes any one or more of the following features: A1) the lubricating grease composition comprises 0.10 wt % to 6.0 wt % of at least one organic molybdenum, wherein the wt % refers to the total amount of the lubricating grease composition; A2) the lubricating grease composition comprises 0.10 wt % to 3.0 wt % of at least one organic phosphoric acid amine salt, wherein the wt % refers to the total amount of the lubricating grease composition; A3) the lubricating grease composition comprises 0.10 wt % to 3.0 wt % of at least one organic zinc phosphate, wherein the wt % refers to the total amount of the lubricating grease composition; A4) the at least one organic molybdenum is selected from one or more of dithiophosphate molybdenum, dithiocarbamate molybdenum, phosphorus-free and sulfur-free organic molybdenum; A5) the at least one organic phosphoric acid amine salt is selected from one or more of organic phosphorus alkylamine salts and organic phosphorus diimide salts; A6) The at least one organic zinc phosphate is selected from one or more of primary zinc dithiophosphate, secondary zinc dithiophosphate and tertiary zinc dithiophosphate.

4. The lubricating grease composition for constant velocity joints according to claim 3, characterized in that: Also includes any one or more of the following features: A51) the alkylamine carbon chain of the at least one organophosphorus alkylamine salt is a C4 to C24 alkyl group; A52) The imide in the at least one organic phosphorus imide salt is one or more of polyisobutylene succinimide and alkyl diamide; wherein the alkyl carbon chain of the alkyl diamide is a C4 to C24 alkyl group.

5. The lubricating grease composition for constant velocity joints according to claim 1, characterized in that: Also includes any one or more of the following features: C1) the lubricating grease composition comprises 2 wt % to 30 wt % of at least one thickener, wherein the wt % refers to the total amount of the lubricating grease composition; C2) the lubricating grease composition comprises 60 wt % to 95 wt % of at least one base oil, wherein the wt % refers to the total amount of the lubricating grease composition; C3) the at least one thickener is selected from one or more of at least one urea thickener, at least one lithium soap, at least one lithium complex soap, at least one sodium-based grease, one complex sodium-based grease, at least one calcium soap, and one complex calcium-based soap; C4) the at least one base oil is selected from one or more of poly-α-olefins, metal poly-α-olefins, naphthenic oils, paraffinic oils, polyether polyols, and synthetic organic esters; C5) The lubricating grease composition further comprises 0.1 wt % to 2.0 wt % of at least one antioxidant, wherein the wt % refers to the total amount of the lubricating grease composition.

6. The lubricating grease composition for constant velocity joints according to claim 5, characterized in that: Also includes any one or more of the following features: C41) the at least one base oil comprises 30 wt.% to 85 wt.% of at least one paraffinic oil, the wt.% being relative to the total amount of the base oil; C42) the at least one base oil contains 15 wt % to 80 wt % of at least one naphthenic oil, the wt % being relative to the total amount of the base oil; C51) The antioxidant is selected from phenolic antioxidants and / or amine-containing phenolic antioxidants.

7. The lubricating grease composition for constant velocity joints according to claim 1, characterized in that: The lubricating grease composition comprises, by weight percentage, 60 wt % to 95 wt % of at least one base oil, 2 wt % to 30 wt % of at least one thickener, 0.10 wt % to 3.0 wt % of at least one organic phosphate amine salt, 0.10 wt % to 5.0 wt % of organic molybdenum, 0.10 wt % to 3.0 wt % of at least one organic zinc phosphate, and 0.10 wt % to 2.0 wt % of at least one antioxidant.

8. A method for preparing a lubricating grease composition for a constant velocity joint according to any one of claims 1 to 7, characterized in that: The preparation method comprises: mixing at least one base oil, at least one thickener, at least one organic phosphate amine salt, at least one organic molybdenum, and at least one organic zinc phosphate.

9. Use of the lubricating grease composition for constant velocity joints according to any one of claims 1 to 7 and / or the lubricating grease composition for constant velocity joints prepared by the preparation method according to claim 8 in constant velocity joints.

10. The use according to claim 9, characterized in that The constant velocity universal joint is a constant velocity universal joint specially used for new energy vehicles and traditional fuel vehicles; or, the constant velocity universal joint is a three-pin universal joint or a ball universal joint.

11. A constant velocity universal joint, characterized in that: The invention comprises the lubricating grease composition for constant velocity joints according to any one of claims 1 to 7 and / or the lubricating grease composition for constant velocity joints prepared by the preparation method according to claim 8.

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