CN114350430A - Lubricating grease, preparation method and application thereof - Google Patents
Lubricating grease, preparation method and application thereof Download PDFInfo
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Abstract
The invention provides lubricating grease, a preparation method and application thereof, wherein the lubricating grease comprises the following components in percentage by mass: 42.5% -49.3% of urea-based grease; 41.1% -48.0% of lithium-based grease; 0.5% -1.1% of a dispersant; 0.3% -1.0% of an oiliness agent; 5.55% -7.50% of an antiwear agent. The lithium grease and the urea grease in the lubricating grease have a synergistic effect, so that the lubricating grease has excellent lubricating protection performance, and in addition, the preparation method of the lubricating grease is simple and is convenient to popularize and use.
Description
Technical Field
The invention belongs to the technical field of lubricating grease, and relates to lubricating grease, a preparation method and application thereof.
Background
With the rapid development of industrial process, grease is used in large quantities due to its good friction-reducing and wear-resisting effects, and becomes an indispensable lubricant for industrial equipment.
The lubricating grease is prepared by blending mineral oil (or synthetic lubricating oil) and a thickening agent, is a thick grease-like semisolid, is used for a mechanical friction part, plays a role in lubricating, reducing mechanical friction and preventing mechanical abrasion, and simultaneously plays a role in protecting metal corrosion and sealing and dust prevention; also on the metal surface, and plays a role in filling the gap and preventing the metal from rusting or corroding.
At present, the lubricating performance of the lubricating grease on the market is still to be improved, so that the lubricating grease with better lubricating performance is urgently needed to be developed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide lubricating grease, a preparation method and application thereof, wherein lithium grease and urea grease in the lubricating grease have a synergistic effect, and the lubricating protection performance of the lubricating grease can be obviously improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention aims to provide lubricating grease which comprises the following components in percentage by mass:
42.5-49.3% of urea-based grease
41.1-48.0% of lithium-based grease
0.5 to 1.1 percent of dispersant
0.3 to 1.0 percent of oiliness agent
5.55% -7.50% of an antiwear agent.
As is well known to those skilled in the art, the sum of the mass percentages of the components of the grease should be 100%.
The urea grease is grease which takes an organic compound containing two or more urea groups as a thickening agent. The urea-based grease avoids the catalytic action of metal ions on base oil, has good high-temperature performance and extremely long bearing life, and has excellent lubricating performance and water resistance. The urea-based grease has model number products such as 7017-1, 7029, 7039D, 7201, 7412, 7417 and the like. The urethane of the present invention may be any one type of urethane or a combination of at least two types of urethane, typically but not limited to a combination of urea 7017-1 and 7029, 7039D, 7201 and 7412, 7017-1, 7029 and 7417, and the like.
The lithium grease, i.e., lithium grease, is made from a natural lithium fatty acid soap (stearic acid or 12-hydroxystearic acid), a thickened medium viscosity mineral or synthetic lubricating oil. The lithium-based grease is preferably universal lithium-based grease and is divided into three grades of No. 1, No. 2 and No. 3 according to the penetration degree of the lithium-based grease. The lithium-based grease of the present invention may be of any one brand or a combination of at least two brands, typically but not limited to combinations such as No. 1 and No. 2, No. 2 and No. 3, No. 1, No. 2 and No. 3, and the like.
The urea grease and the lithium grease in the lubricating grease provided by the invention are mutually synergistic, and have excellent lubricating protection performance.
In the lubricating grease, the mass percentage of the urea-based grease is 42.5-49.3%, such as 43.0%, 44.5%, 46.2%, 47.8%, 48.1% or 49.0%, and preferably 45.0-47.5%;
the mass percentage of the lithium-based grease is 41.1-48.0%, such as 41.5%, 42.6%, 43.8%, 45.2%, 46.7% or 47.6%, and the like, preferably 44.0-46.7%;
the mass percentage of the dispersant is 0.5-1.1%, such as 0.6%, 0.7%, 0.8%, 0.9% or 1.0%, and preferably 0.8-1.0%;
the mass percentage of the oiliness agent is 0.3% -1.0%, such as 0.4%, 0.5%, 0.6%, 0.7%, 0.8% or 0.9%, and the like, preferably 0.5% -0.9%;
the antiwear agent accounts for 5.55-7.50% by mass, such as 5.60%, 5.80%, 6.00%, 6.23%, 6.52%, 6.85%, 7.00%, 7.35% or 7.46%, and preferably 5.80-6.50%.
As a preferable technical scheme, the lubricating grease comprises the following components in percentage by mass:
45.0-47.5% of urea-based grease
44.0-46.7% of lithium-based grease
0.8 to 1.0 percent of dispersant
0.5-0.9% of oiliness agent
5.8% -6.5% of an antiwear agent.
The dispersant can promote the base grease in the lubricating grease to be uniformly dispersed, and as a preferable technical scheme, the dispersant is selected from polyisobutenyl butene bissuccinimide, and the polyisobutenyl bissuccinimide not only has a dispersing function, but also can resist carbonization and coking in the lubricating grease.
The oiliness agent is a chemical which plays a role of enhancing the lubricity of the lubricating oil and preventing wear and scuffing under boundary lubrication conditions, and is generally animal and vegetable oil or a compound having a polar group at the terminal of a hydrocarbon chain, and these compounds have a strong affinity for metals, and function to adsorb on the friction surface through the polar group to form a molecular orientation adsorption film, preventing the metals from contacting with each other, thereby reducing friction and wear, i.e., the oiliness agent has an anti-wear effect in the high temperature resistant grease. The oiliness agent is generally: (1) higher fatty acids such as palmitic acid and oleic acid; (2) higher alcohols such as lauryl alcohol and cetyl alcohol; (3) fatty acid esters such as fats and oils and butyl stearate; (4) alkylamines, such as cetylamine and oleamide; (5) acid phosphates such as lauryl acid phosphate and oleyl acid phosphate; (6) organic sulfur compounds, such as sulfurized sperm oil and sulfurized oleic acid. Preferably, the oiliness agent in the high temperature resistant grease is selected from benzotriazole fatty acid amine salt.
The antiwear agent or the antiwear agent combination in the lubricating grease is helpful for improving the abrasion resistance and extreme pressure property of the lubricating grease, the commonly used antiwear agent comprises sulfur compounds, chlorine and fluoride, phosphorus compounds, molybdenum and sulfide, certain metal compounds and others (including tungsten carbonyl, borate or borate ester) and the like, and as a preferred technical scheme, the antiwear agent comprises lanthanum oxide, and further preferably, the lanthanum oxide accounts for 1.0-1.8% by mass of the lubricating grease, such as 1.2%, 1.3%, 1.5% or 1.7% by mass.
The lubricating grease added with a certain amount of lanthanum oxide not only plays a role of an antiwear agent, but also has a synergistic effect with basic grease (lithium grease and urea grease), and has excellent lubricating protection performance of a reinforced friction pair by mutual cooperation.
As a preferable technical scheme, the antiwear agent also comprises molybdenum disulfide and copper borate.
Preferably, the antiwear agent comprises the following components in percentage by mass in the lubricating grease:
1.0-1.8 percent of lanthanum oxide
4.5 to 5.2 percent of molybdenum disulfide
0.05-0.5% of copper borate.
The antiwear agent combination can exert the optimal antiwear and load resistance in the lubricating grease.
The mass percentage of the molybdenum disulfide in the lubricating grease is 4.5-5.2%, such as 4.6%, 4.7%, 4.8%, 4.9%, 5.0% or 5.1%, and the like, and preferably 4.9-5.1%. The molybdenum disulfide has anti-wear and anti-load properties in the grease.
The mass percentage of the copper borate (CAS: 39290-85-2) in the lubricating grease is 0.05-0.5%, such as 0.06%, 0.08%, 0.09%, 0.1%, 0.2%, 0.3% or 0.4%, and the like, and preferably 0.08-0.12%. The copper borate has anti-wear properties in grease.
As a preferable technical scheme, the antiwear agent comprises the following components in percentage by mass in the lubricating grease:
1.3 to 1.7 percent of lanthanum oxide
4.9 to 5.1 percent of molybdenum disulfide
0.08-0.12% of copper metaborate.
As the most preferred technical scheme, the lubricating grease comprises the following components in percentage by mass:
45.0 percent of urea-based grease
46.7 percent of lithium-based grease
1.0 percent of dispersant
0.7 percent of oiliness agent
1.5 percent of lanthanum oxide
5.0 percent of molybdenum disulfide
0.1 percent of copper borate.
The invention also aims to provide a preparation method of the lubricating grease, which comprises the following steps:
step 1, heating a dispersing agent and an oiliness agent to prepare a mother solution;
step 2, uniformly mixing the urea-based grease, the lithium-based grease, the mother liquor and the antiwear agent;
and 3, grinding the mixed material obtained in the step 2 to obtain the lubricating grease.
As a preferable technical scheme, the heating temperature in the step 1 is 50-60 ℃, such as 52 ℃, 53 ℃, 55 ℃, 56 ℃ or 58 ℃ and the like.
Preferably, step 2 sequentially adds lithium-based grease, urea-based grease, lanthanum oxide, molybdenum disulfide, mother liquor and copper borate into the reaction kettle and uniformly mixes.
Preferably, the grinding in step 3 is carried out in a three-roll grinding calender, and the grinding mechanism of the three-roll grinding calender is degassing and the compactness of the lubricating grease is better.
Preferably, the number of grinding passes in step 3 is 3-6, such as 4 or 5, etc.
The preparation method of the high-temperature-resistant lubricating grease provided by the invention is simple and convenient to popularize and use.
It is a further object of the present invention to provide a use of the grease as described above in a mechanical device.
The recitation of numerical ranges herein includes not only the above-recited numerical values, but also any numerical values between non-recited numerical ranges, and is not intended to be exhaustive or to limit the invention to the precise numerical values encompassed within the range for brevity and clarity.
Compared with the prior art, the invention has the beneficial effects that:
1. the lithium grease and the urea grease in the lubricating grease provided by the invention have a synergistic effect, so that the lubricating grease has excellent lubricating protection performance;
2. lanthanum oxide, lithium-based grease and urea-based grease in the lubricating grease provided by the invention have a synergistic effect, so that the lubricating grease has excellent lubricating protection performance of a reinforced friction pair;
3. the lubricating grease provided by the invention can prevent coking and carbonization;
4. the lubricating grease provided by the invention has excellent wear resistance and load resistance;
5. the high-temperature-resistant lubricating grease provided by the invention is simple in preparation method and can be widely applied to lubrication of mechanical equipment.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments.
Example 1
The lubricating grease comprises the following components in percentage by mass:
43.0 percent of urea-based grease
48.0 percent of lithium-based grease
0.5 percent of dispersant
1.0 percent of oiliness agent
1.8 percent of lanthanum oxide
5.2 percent of molybdenum disulfide
0.5% of copper borate;
the dispersant is polyisobutylene bis-succinimide;
the oiliness agent is benzotriazole fatty acid amine salt.
The preparation method of the lubricating grease comprises the following steps:
step 1, heating a dispersing agent and an oiliness agent to prepare a mother solution, wherein the heating temperature is 50 ℃;
step 2, adding lithium-based grease, urea-based grease, lanthanum oxide, molybdenum disulfide, mother liquor and copper borate into a reaction kettle, and uniformly stirring and mixing;
and 3, grinding the mixed material obtained in the step 2 in a three-roll grinding calender for 6 times to obtain the lubricating grease.
Example 2
The lubricating grease comprises the following components in percentage by mass:
49.3 percent of urea-based grease
43.75 percent of lithium-based grease
1.1 percent of dispersant
0.3 percent of oiliness agent
1.0 percent of lanthanum oxide
4.5 percent of molybdenum disulfide
0.05% of copper borate;
the dispersant is polyisobutylene bis-succinimide;
the oiliness agent is benzotriazole fatty acid amine salt.
The preparation method of the lubricating grease comprises the following steps:
step 1, heating a dispersing agent and an oiliness agent to prepare a mother solution, wherein the heating temperature is 60 ℃;
step 2, adding lithium-based grease, urea-based grease, lanthanum oxide, molybdenum disulfide, mother liquor and copper metaborate into a reaction kettle, and uniformly stirring and mixing;
and 3, grinding the mixed material obtained in the step 2 in a three-roll grinding calender for 4 times to obtain the lubricating grease.
Example 3
The lubricating grease comprises the following components in percentage by mass:
42.5 percent of urea-based grease
48.0 percent of lithium-based grease
1.0 percent of dispersant
1.0 percent of oiliness agent
1.8 percent of lanthanum oxide
5.2 percent of molybdenum disulfide
0.5% of copper borate;
the dispersant is polyisobutylene bis-succinimide;
the oiliness agent is benzotriazole fatty acid amine salt.
The preparation method of the lubricating grease comprises the following steps:
step 1, heating a dispersing agent and an oiliness agent to prepare a mother solution, wherein the heating temperature is 55 ℃;
step 2, adding lithium-based grease, urea-based grease, lanthanum oxide, molybdenum disulfide, mother liquor and copper borate into a reaction kettle, and uniformly stirring and mixing;
and 3, grinding the mixed material obtained in the step 2 in a three-roll grinding calender for 5 times to obtain the lubricating grease.
Example 4
The lubricating grease comprises the following components in percentage by mass:
49.3 percent of urea-based grease
41.1 percent of lithium-based grease
1.1 percent of dispersant
1.0 percent of oiliness agent
1.8 percent of lanthanum oxide
5.2 percent of molybdenum disulfide
0.5% of copper borate;
the dispersant is polyisobutylene bis-succinimide;
the oiliness agent is benzotriazole fatty acid amine salt.
The preparation method of the lubricating grease comprises the following steps:
step 1, heating a dispersing agent and an oiliness agent to prepare a mother solution, wherein the heating temperature is 58 ℃;
step 2, adding lithium-based grease, urea-based grease, lanthanum oxide, molybdenum disulfide, mother liquor and copper borate into a reaction kettle, and uniformly stirring and mixing;
and 3, grinding the mixed material obtained in the step 2 in a three-roll grinding calender for 5 times to obtain the lubricating grease.
Example 5
The lubricating grease comprises the following components in percentage by mass:
45.82 percent of urea-based grease
46.0 percent of lithium-based grease
0.8 percent of dispersant
0.9 percent of oiliness agent
1.3 percent of lanthanum oxide
5.1 percent of molybdenum disulfide
0.08 percent of copper borate;
the dispersant is polyisobutylene bis-succinimide;
the oiliness agent is benzotriazole fatty acid amine salt.
The preparation method of the lubricating grease comprises the following steps:
step 1, heating a dispersing agent and an oiliness agent to prepare a mother solution, wherein the heating temperature is 60 ℃;
step 2, adding lithium-based grease, urea-based grease, lanthanum oxide, molybdenum disulfide, mother liquor and copper borate into a reaction kettle, and uniformly stirring and mixing;
and 3, grinding the mixed material obtained in the step 2 in a three-roll grinding calender for 4 times to obtain the lubricating grease.
Example 6
The lubricating grease comprises the following components in percentage by mass:
47.5 percent of urea-based grease
44.28 percent of lithium-based grease
1.0 percent of dispersant
0.5 percent of oiliness agent
Lanthanum oxide 1.7%
4.9 percent of molybdenum disulfide
0.12% of copper borate;
the dispersant is polyisobutylene bis-succinimide;
the oiliness agent is benzotriazole fatty acid amine salt.
The preparation method of the lubricating grease comprises the following steps:
step 1, heating a dispersing agent and an oiliness agent to prepare a mother solution, wherein the heating temperature is 50 ℃;
step 2, adding lithium-based grease, urea-based grease, lanthanum oxide, molybdenum disulfide, mother liquor and copper borate into a reaction kettle, and uniformly stirring and mixing;
and 3, grinding the mixed material obtained in the step 2 in a three-roll grinding calender for 6 times to obtain the lubricating grease.
Example 7
The lubricating grease comprises the following components in percentage by mass:
45.5 percent of urea-based grease
46.1 percent of lithium-based grease
0.9 percent of dispersant
0.8 percent of oiliness agent
1.5 percent of lanthanum oxide
5.1 percent of molybdenum disulfide
0.10% of copper borate;
the dispersant is polyisobutylene bis-succinimide;
the oiliness agent is benzotriazole fatty acid amine salt.
The preparation method of the lubricating grease comprises the following steps:
step 1, heating a dispersing agent and an oiliness agent to prepare a mother solution, wherein the heating temperature is 50 ℃;
step 2, adding lithium-based grease, urea-based grease, lanthanum oxide, molybdenum disulfide, mother liquor and copper borate into a reaction kettle, and uniformly stirring and mixing;
and 3, grinding the mixed material obtained in the step 2 in a three-roll grinding calender for 5 times to obtain the lubricating grease.
Example 8
The lubricating grease comprises the following components in percentage by mass:
47.5 percent of urea-based grease
44.0 percent of lithium-based grease
1.0 percent of dispersant
0.9 percent of oiliness agent
Lanthanum oxide 1.7%
4.78 percent of molybdenum disulfide
0.12% of copper borate;
the dispersant is polyisobutylene bis-succinimide;
the oiliness agent is benzotriazole fatty acid amine salt.
The preparation method of the lubricating grease comprises the following steps:
step 1, heating a dispersing agent and an oiliness agent to prepare a mother solution, wherein the heating temperature is 55 ℃;
step 2, adding lithium-based grease, urea-based grease, lanthanum oxide, molybdenum disulfide, mother liquor and copper borate into a reaction kettle, and uniformly stirring and mixing;
and 3, grinding the mixed material obtained in the step 2 in a three-roll grinding calender for 4 times to obtain the lubricating grease.
Example 9
The lubricating grease comprises the following components in percentage by mass:
45.0 percent of urea-based grease
46.7 percent of lithium-based grease
1.0 percent of dispersant
0.7 percent of oiliness agent
1.5 percent of lanthanum oxide
5.0 percent of molybdenum disulfide
0.1% of copper borate;
the dispersant is polyisobutylene bis-succinimide;
the oiliness agent is benzotriazole fatty acid amine salt.
The preparation method of the lubricating grease comprises the following steps:
step 1, heating a dispersing agent and an oiliness agent to prepare a mother solution, wherein the heating temperature is 55 ℃;
step 2, adding lithium-based grease, urea-based grease, lanthanum oxide, molybdenum disulfide, mother liquor and copper borate into a reaction kettle, and uniformly stirring and mixing;
and 3, grinding the mixed material obtained in the step 2 in a three-roll grinding calender for 5 times to obtain the lubricating grease.
Comparative example 1
The components and the mass percentage of each component of the lubricating grease are the same as those in example 9, and the only difference is that the lithium base grease is replaced by the composite calcium base grease,
the preparation of the grease was the same as that of example 9.
Comparative example 2
The components and the mass percentages of the components of the lubricating grease are the same as those in example 9, and the only difference is that the urea grease is replaced by the sodium grease.
The preparation of the grease was the same as that of example 9.
Comparative example 3
The lubricating grease comprises the following components in percentage by mass:
52.0 percent of urea-based grease
39.7 percent of lithium-based grease
1.0 percent of dispersant
0.7 percent of oiliness agent
1.5 percent of lanthanum oxide
5.0 percent of molybdenum disulfide
0.1% of copper borate;
the dispersant is polyisobutylene bis-succinimide;
the oiliness agent is benzotriazole fatty acid amine salt.
The preparation of the grease was the same as that of example 9.
Comparative example 4
The lubricating grease comprises the following components in percentage by mass:
41.7 percent of urea-based grease
50.0 percent of lithium-based grease
1.0 percent of dispersant
0.7 percent of oiliness agent
1.5 percent of lanthanum oxide
5.0 percent of molybdenum disulfide
0.1% of copper borate;
the dispersant is polyisobutylene bis-succinimide;
the oiliness agent is benzotriazole fatty acid amine salt.
The preparation of the grease was the same as that of example 9.
Comparative example 5
The components and the mass percentage of each component of the lubricating grease are the same as those in example 9, and the only difference is that lanthanum oxide is replaced by cerium oxide or graphite.
The preparation of the grease was the same as that of example 9.
Comparative example 6
The lubricating grease comprises the following components in percentage by mass:
45.0 percent of urea-based grease
46.2 percent of lithium-based grease
1.0 percent of dispersant
0.7 percent of oiliness agent
2.0 percent of lanthanum oxide
5.0 percent of molybdenum disulfide
0.1% of copper borate;
the dispersant is polyisobutylene bis-succinimide;
the oiliness agent is benzotriazole fatty acid amine salt.
The preparation method of the lubricating grease comprises the following steps:
step 1, heating a dispersing agent and an oiliness agent to prepare a mother solution, wherein the heating temperature is 55 ℃;
step 2, adding lithium-based grease, urea-based grease, lanthanum oxide, molybdenum disulfide, mother liquor and copper borate into a reaction kettle, and uniformly stirring and mixing;
and 3, grinding the mixed material obtained in the step 2 for 5 times to obtain the lubricating grease.
Comparative example 7
The lubricating grease comprises the following components in percentage by mass:
45.0 percent of urea-based grease
47.7 percent of lithium-based grease
1.0 percent of dispersant
0.7 percent of oiliness agent
0.5 percent of lanthanum oxide
5.0 percent of molybdenum disulfide
0.1% of copper borate;
the dispersant is polyisobutylene bis-succinimide;
the oiliness agent is benzotriazole fatty acid amine salt.
The preparation method of the lubricating grease comprises the following steps:
step 1, heating a dispersing agent and an oiliness agent to prepare a mother solution, wherein the heating temperature is 55 ℃;
step 2, adding lithium-based grease, urea-based grease, lanthanum oxide, molybdenum disulfide, mother liquor and copper borate into a reaction kettle, and uniformly stirring and mixing;
and 3, grinding the mixed material obtained in the step 2 for 5 times to obtain the lubricating grease.
The above examples and comparative examples were tested for performance, the test types and test methods were as follows:
1. working cone penetration: GB/T269-1991;
2. dropping point: GB/T4929-1985;
3. PD value: GB/T12583-98;
4. etching (T2 copper sheet, 100 ℃, 24 h): GB/T7326-1987.
The test results are shown in table 1 below:
TABLE 1 test results
As can be seen from the above table, the lithium grease and the urea grease have a synergistic effect, so that the grease has excellent lubrication protection performance, excellent abrasion resistance and load resistance, and the PD value (kgf) of the grease can reach 650 at most;
lanthanum oxide in the lubricating grease has a synergistic effect with lithium-based grease and urea-based grease, so that the lubricating grease has excellent lubricating protection performance for enhancing a friction pair;
the grease can prevent coking and carbonization, and the dropping point of the grease can reach 320 ℃ at most.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The lubricating grease is characterized by comprising the following components in percentage by mass:
42.5-49.3% of urea-based grease
41.1-48.0% of lithium-based grease
0.5 to 1.1 percent of dispersant
0.3 to 1.0 percent of oiliness agent
5.55% -7.50% of an antiwear agent.
2. The lubricating grease of claim 1, which comprises the following components in percentage by mass:
45.0-47.5% of urea-based grease
44.0-46.7% of lithium-based grease
0.8 to 1.0 percent of dispersant
0.5-0.9% of oiliness agent
5.8% -6.5% of an antiwear agent.
3. The grease of claim 1, wherein the dispersant is selected from the group consisting of polyisobutylene bis-succinimide;
the oiliness agent is selected from benzotriazole fatty acid amine salt.
4. The grease of claim 1 wherein the antiwear agent comprises lanthanum oxide;
the mass percentage of the lanthanum oxide in the lubricating grease is 1.0-1.8%.
5. The grease of claim 1, wherein the antiwear agent further comprises molybdenum disulfide and copper borate;
the antiwear agent comprises the following components in percentage by mass in the lubricating grease:
1.0-1.8 percent of lanthanum oxide
4.5 to 5.2 percent of molybdenum disulfide
0.05-0.5% of copper borate.
6. The lubricating grease of claim 1, wherein the antiwear agent comprises, in mass percent in the lubricating grease:
1.3 to 1.7 percent of lanthanum oxide
4.9 to 5.1 percent of molybdenum disulfide
0.08% -0.12% of copper borate.
7. The lubricating grease of claim 1, which comprises the following components in percentage by mass:
45.0 percent of urea-based grease
46.7 percent of lithium-based grease
1.0 percent of dispersant
0.7 percent of oiliness agent
1.5 percent of lanthanum oxide
5.0 percent of molybdenum disulfide
0.1 percent of copper borate.
8. A method of preparing a grease according to any one of claims 1-7, characterized in that the method comprises the steps of:
step 1, heating a dispersing agent and an oiliness agent to prepare a mother solution;
step 2, uniformly mixing the urea-based grease, the lithium-based grease, the mother liquor and the antiwear agent;
and 3, grinding the mixed material obtained in the step 2 to obtain the lubricating grease.
9. The method for preparing the lubricating grease of claim 8, wherein the heating temperature in step 1 is 50 ℃ to 60 ℃;
step 2, sequentially adding lithium-based grease, urea-based grease, lanthanum oxide, molybdenum disulfide, mother liquor and copper borate into a reaction kettle, and uniformly mixing;
3, grinding is carried out in a three-roller grinding calender;
and 3, grinding for 3-6 times.
10. Use of a grease according to any one of claims 1-7 for lubricating mechanical equipment.
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