CN114292684B - High-temperature-resistant lubricating grease, and preparation method and application thereof - Google Patents
High-temperature-resistant lubricating grease, and preparation method and application thereof Download PDFInfo
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Abstract
The invention provides high-temperature-resistant lubricating grease, a preparation method and application thereof, wherein the high-temperature-resistant lubricating grease comprises the following components in percentage by mass: 46.0% -53.0% of composite calcium-based grease; 40.0% -46.0% of composite titanium-based grease; 1.5% -2.3% of polyisobutylene bis-succinimide; 0.5% -1.2% of an oiliness agent; 0.1% -1.0% of antioxidant; 2.65% -4.6% of an antiwear agent; the composite calcium-based grease, the composite titanium-based grease and the polyisobutylene bis-succinimide in the high-temperature resistant lubricating grease have a synergistic effect, so that the high-temperature resistant lubricating grease has excellent high-temperature resistance and wear resistance, and in addition, the preparation method of the high-temperature resistant 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 high-temperature-resistant 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 grease on the market has poor high temperature resistance, so that the lubricating grease is easy to coke and carbonize, and therefore, the lubricating grease with excellent high temperature resistance is urgently needed to be developed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the high-temperature-resistant lubricating grease, the preparation method and the application thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention aims to provide high-temperature-resistant lubricating grease which comprises the following components in percentage by mass:
46.0-53.0% of composite calcium-based grease
40.0-46.0% of composite titanium-based grease
Polyisobutylene bis-succinimide 1.5% -2.3%
0.5-1.2% of oiliness agent
0.1 to 1.0 percent of antioxidant
2.65% -4.6% of an antiwear agent.
As known to those skilled in the art, the sum of the mass percentages of the components in the high-temperature resistant grease should be 100%.
The composite calcium-based grease, the composite titanium-based grease and the polyisobutylene bis-succinimide in the high-temperature-resistant lubricating grease provided by the invention have a synergistic effect, so that the high-temperature-resistant lubricating grease has excellent high-temperature resistance, and is not carbonized or coked in a high-temperature working environment.
The mass percentage of the composite calcium-based grease in the high-temperature resistant lubricating grease is 46.0-53.0%, such as 46.5%, 47.0%, 48.0%, 50.0%, 51.2% or 52.8%, and the like, and the mass percentage is preferably 49.0-51.0%.
The mass percentage of the composite titanium-based grease in the high-temperature resistant lubricating grease is 40.0-46.0%, such as 41.5%, 42.5%, 43.8%, 44.2% or 45.6%, and the like, and the mass percentage is preferably 42.0-44.0%.
The composite calcium-based grease and the composite titanium-based grease are base grease of the high-temperature-resistant lubricating grease, and play an important role in the high-temperature resistance of the high-temperature-resistant lubricating grease.
As a preferable technical scheme, the composite calcium-based grease is mainly prepared from fatty acid, calcium hydroxide and base oil, and the base oil can be animal and vegetable fat.
The composite calcium-based grease is divided into four grades of 1, 2, 3 and 4 according to different penetration degrees. The composite calcium-based grease can be any one or a combination of at least two grades, and typical but non-limiting composite calcium-based grease combinations such as the composite calcium-based grease No. 1 and the composite calcium-based grease No. 4, the composite calcium-based grease No. 2 and the composite calcium-based grease No. 3, the composite calcium-based grease No. 1, the composite calcium-based grease No. 3 and the composite calcium-based grease No. 4.
As a preferable technical scheme, the compound titanium base grease is mainly prepared from terephthalic acid, stearic acid, an organic titanium compound and base oil, and the base oil can be animal and vegetable fat.
The composite titanium-based grease generally comprises No. 2 and No. 3 according to the penetration degree of the cone. The titanium complex grease of the invention can be No. 2 and/or No. 3.
The titanium complex base may be obtained commercially.
The mass percentage of the polyisobutylene bis-succinimide in the high-temperature resistant lubricating grease is 1.5% -2.3%, such as 1.6%, 1.8%, 2.0% or 2.1%, and preferably 1.8% -2.2%; the polyisobutylene bis-succinimide has a dispersing function and a compounding function in the high-temperature-resistant lubricating grease, has a synergistic effect with basic grease (composite calcium grease and composite titanium grease), and can resist carbonization and coking.
The mass percentage of the oiliness agent in the high-temperature resistant lubricating grease is 0.5-1.2%, such as 0.6%, 0.7%, 0.9%, 1.0% or 1.1%, and preferably 0.9-1.1%.
The mass percentage of the antioxidant in the high-temperature resistant lubricating grease is 0.1-1.0%, such as 0.2%, 0.3%, 0.5%, 0.7% or 0.9%, and preferably 0.8-1.0%;
the weight percentage of the antiwear agent in the high-temperature resistant lubricating grease is 2.65-4.6%, such as 3.0%, 3.3%, 3.5%, 3.8%, 4.2% or 4.4%, and the like, and the content of the antiwear agent is preferably 3.5-4.0%.
As a preferred technical scheme, the high-temperature resistant lubricating grease comprises the following components in percentage by mass:
49.0-51.0% of composite calcium-based grease
42.0-44.0% of composite titanium-based grease
Polyisobutylene bis-succinimide 1.8% -2.2%
0.9-1.1% of oiliness agent
0.8 to 1.0 percent of antioxidant
3.5% -4.0% of an antiwear agent.
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.
In the production and use processes of the lubricating grease, impurities or conditions such as heating, metal, oxygen and the like are encountered, so that an oxidation monomer is easily generated, oil sludge, insoluble polar colloid, paint film and deposit are generated through a free radical reaction, and an antioxidant can break a reaction chain of an oxidation chain locking reaction, so that the further progress of the oxidation reaction is stopped. Commonly used antioxidants include amines such as diphenylamine or phenylenediamine derivatives, which are preferably selected from 2, 6-di-tert-butyl-p-cresol.
The antiwear agent or the antiwear agent combination in the lubricating grease is helpful to improve the abrasion resistance and extreme pressure property of the lubricating grease, the common antiwear agent comprises sulfur compounds, chlorine and fluoride, phosphorus compounds, molybdenum and sulfide, certain metal compounds and others (including tungsten carbonyl, borate or boric acid ester) and the like, and as a preferred technical scheme, the antiwear agent comprises the following components in percentage by mass in the high-temperature resistant lubricating grease:
0.1-0.8 percent of lanthanum oxide
2.5 to 3.3 percent of molybdenum disulfide
0.05-0.5% of copper borate.
The antiwear agent combination can exert the optimal antiwear performance in the high-temperature resistant lubricating grease.
The mass percentage of the lanthanum oxide (CAS:1312-81-8) in the high-temperature resistant lubricating grease is 0.1-0.8%, such as 0.2%, 0.5%, 0.6% or 0.7%, and preferably 0.4-0.6%. The lanthanum oxide is high-temperature resistant, can be compounded with the composite titanium base grease in the high-temperature resistant lubricating grease, and has the lubricating protection performance of a friction pair.
The mass percentage of the molybdenum disulfide in the high-temperature resistant lubricating grease is 2.5-3.3%, such as 2.6%, 2.7%, 2.8%, 2.9%, 3.0% or 3.2%, and preferably 2.8-3.1%. The molybdenum disulfide has anti-wear and anti-load properties in the high temperature resistant grease.
The mass percentage of the copper borate in the high-temperature resistant 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 preferably 0.08-0.12%. The copper borate has anti-wear properties in the high temperature resistant grease.
As a preferable technical scheme, the antiwear agent comprises the following components in percentage by mass in the high-temperature resistant lubricating grease:
0.4 to 0.6 percent of lanthanum oxide
2.8 to 3.1 percent of molybdenum disulfide
0.08% -0.12% of copper borate.
Namely, as a preferred technical scheme, the high-temperature resistant lubricating grease comprises the following components in percentage by mass:
46.0-53.0% of composite calcium-based grease
40.0-46.0% of composite titanium-based grease
Polyisobutylene bis-succinimide 1.5% -2.3%
0.5-1.2% of oiliness agent
0.1 to 1.0 percent of antioxidant
0.1 to 0.8 percent of lanthanum oxide
2.5 to 3.3 percent of molybdenum disulfide
0.05-0.5% of copper borate.
Further preferably, the high-temperature resistant lubricating grease comprises the following components in percentage by mass:
49.0-51.0% of composite calcium-based grease
42.0 to 44.0 percent of composite titanium-based grease
Polyisobutylene bis-succinimide 1.8% -2.2%
0.9-1.1% of benzotriazole fatty acid amine salt
0.8-1.0 percent of 2,6 di-tert-butyl-p-cresol
0.4 to 0.6 percent of lanthanum oxide
2.8 to 3.1 percent of molybdenum disulfide
0.08-0.12% of copper borate.
The second object of the present invention is to provide a method for preparing the high temperature grease, which comprises the following steps:
(1) heating polyisobutylene dibutyldiimide, an antioxidant and an oiliness agent to prepare mother liquor;
(2) uniformly mixing the composite calcium-based grease, the composite titanium-based grease, the mother solution and the antiwear agent;
(3) and (3) grinding the mixed material obtained in the step (2) to obtain the high-temperature-resistant lubricating grease.
As a preferred technical scheme, the heating temperature in the step (1) is 60-65 ℃, such as 62 ℃, 63 ℃ or 64 ℃ and the like.
As a preferred technical scheme, the step (2) sequentially adds the composite calcium-based grease, the composite titanium-based grease, the mother liquor, the lanthanum oxide, the molybdenum disulfide and the copper borate into a reaction kettle and uniformly mixes the materials.
The grinding in step (3) is also carried out in order to de-bubble the product obtained in step (2) and densify the grease texture obtained, and other methods for achieving this can be used.
As a preferable technical scheme, the grinding in the step (3) is carried out on a three-roll grinding calender.
As a preferable technical scheme, the grinding times in the step (3) are 3-6 times, such as 4 times or 5 times.
The preparation method of the high-temperature-resistant lubricating grease provided by the invention is simple and convenient to popularize and use.
The invention also aims to provide the application of the high-temperature-resistant lubricating grease, which is used for lubricating mechanical equipment.
The lubricating grease can lubricate various mechanical equipment, such as cranes, excavators, port equipment, stamping and forging machines, injection molding machines, forklifts, wind driven generators, shipping ships and the like.
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 high-temperature-resistant lubricating grease provided by the invention has a synergistic effect among the composite calcium-based grease, the composite titanium-based grease and the polyisobutylene bis-succinimide, so that the high-temperature-resistant lubricating grease has excellent high-temperature resistance (the dropping point of the high-temperature-resistant lubricating grease can reach 400 ℃ at most), and the high-temperature working environment is not carbonized and coked;
2. the high-temperature resistant lubricating grease provided by the invention has excellent wear resistance (the highest PD value of a four-ball machine is 600 (kgf));
3. the lanthanum oxide and the composite titanium-based grease in the high-temperature resistant grease have a compounding function, so that the high-temperature resistant grease has excellent friction pair lubrication protection performance (the PD value of a four-ball machine can reach up to 600(kgf), and the Ttimken OK value can reach up to 300N);
4. 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 high-temperature-resistant lubricating grease comprises the following components in percentage by mass:
46.0 percent of composite calcium-based grease
46.0 percent of composite titanium-based grease
Polyisobutylene bis-succinimide 2.3%
1.2 percent of oiliness agent
1.0 percent of antioxidant
0.8 percent of lanthanum oxide
2.65 percent of molybdenum disulfide
0.05 percent of copper borate.
The oiliness agent is benzotriazole fatty acid amine salt;
the antioxidant is 2, 6-di-tert-butyl-p-cresol;
a preparation method of high-temperature-resistant lubricating grease comprises the following steps:
(1) heating and uniformly mixing the diisobutylene bissuccinimide, the benzotriazole fatty acid amine salt and the 2, 6-di-tert-butyl-p-cresol to prepare a mother solution, wherein the heating temperature is 60 ℃;
(2) sequentially adding the composite calcium-based grease, the composite titanium-based grease, the mother solution, lanthanum oxide, molybdenum disulfide and copper borate into a reaction kettle, and uniformly stirring and mixing to obtain a mixed material;
(3) and grinding the mixed material in a three-roller grinding calender for 6 times, sampling, and testing to be qualified to obtain the high-temperature-resistant lubricating grease.
Example 2
The high-temperature-resistant lubricating grease comprises the following components in percentage by mass:
53.0 percent of composite calcium-based grease
40.0 percent of composite titanium-based grease
Polyisobutylene bis-succinimide 1.5%
0.5 percent of oiliness agent
1.0 percent of antioxidant
0.8 percent of lanthanum oxide
2.7 percent of molybdenum disulfide
0.5% of copper borate;
the oiliness agent is benzotriazole fatty acid amine salt;
the antioxidant is 2, 6-di-tert-butyl-p-cresol.
A preparation method of high-temperature-resistant lubricating grease comprises the following steps:
(1) heating and uniformly mixing the diisobutylene bissuccinimide, the benzotriazole fatty acid amine salt and the 2, 6-di-tert-butyl-p-cresol to prepare a mother solution, wherein the heating temperature is 65 ℃;
(2) sequentially adding the composite calcium-based grease, the composite titanium-based grease, the mother solution, lanthanum oxide, molybdenum disulfide and copper borate into a reaction kettle, and uniformly stirring and mixing to obtain a mixed material;
(3) and grinding the mixed material in a three-roller grinding calender for 3 times, sampling, and testing to be qualified to obtain the high-temperature-resistant lubricating grease.
Example 3
The high-temperature-resistant lubricating grease comprises the following components in percentage by mass:
53.0 percent of composite calcium-based grease
Composite titanium grease 40.3
Polyisobutylene bis-succinimide 2.3%
1.2 percent of oiliness agent
0.1 percent of antioxidant
0.1 percent of lanthanum oxide
2.5 percent of molybdenum disulfide
0.5% of copper borate;
the oiliness agent is benzotriazole fatty acid amine salt;
the antioxidant is 2, 6-di-tert-butyl-p-cresol.
A preparation method of high-temperature-resistant lubricating grease comprises the following steps:
(1) heating and uniformly mixing the diisobutylene bissuccinimide, the benzotriazole fatty acid amine salt and the 2, 6-di-tert-butyl-p-cresol to prepare a mother solution, wherein the heating temperature is 63 ℃;
(2) sequentially adding the composite calcium-based grease, the composite titanium-based grease, the mother solution, lanthanum oxide, molybdenum disulfide and copper borate into a reaction kettle, and uniformly stirring and mixing to obtain a mixed material;
(3) and grinding the mixed material in a three-roller grinding calender for 4 times, sampling, and testing to be qualified to obtain the high-temperature-resistant lubricating grease.
Example 4
The high-temperature-resistant lubricating grease comprises the following components in percentage by mass:
46.92 percent of composite calcium-based grease
46.0 percent of composite titanium-based grease
Polyisobutylene bis-succinimide 2.3%
0.5 percent of oiliness agent
Antioxidant 1.0%
0.2 percent of lanthanum oxide
Molybdenum disulfide 3.0%
0.08 percent of copper borate;
the oiliness agent is benzotriazole fatty acid amine salt;
the antioxidant is 2, 6-di-tert-butyl-p-cresol.
A preparation method of high-temperature-resistant lubricating grease comprises the following steps:
(1) heating and uniformly mixing the diisobutylene bissuccinimide, the benzotriazole fatty acid amine salt and the 2, 6-di-tert-butyl-p-cresol to prepare a mother solution, wherein the heating temperature is 62 ℃;
(2) sequentially adding the composite calcium-based grease, the composite titanium-based grease, the mother solution, lanthanum oxide, molybdenum disulfide and copper borate into a reaction kettle, and uniformly stirring and mixing to obtain a mixed material;
(3) and grinding the mixed material in a three-roller grinding calender for 4 times, sampling, and testing to be qualified to obtain the high-temperature-resistant lubricating grease.
Example 5
The high-temperature-resistant lubricating grease comprises the following components in percentage by mass:
50.72 percent of composite calcium-based grease
42.0 percent of composite titanium-based grease
Polyisobutylene bis-succinimide 1.8%
Benzotriazole fatty acid amine salt 1.1%
2,6 di-tert-butyl-p-cresol 0.8%
0.6 percent of lanthanum oxide
2.8 percent of molybdenum disulfide
0.08 percent of copper borate.
A preparation method of high-temperature-resistant lubricating grease comprises the following steps:
(1) heating and uniformly mixing polyisobutylene bis-succinimide, benzotriazole fatty acid amine salt and 2, 6-di-tert-butyl-p-cresol to prepare mother liquor, wherein the heating temperature is 63 ℃;
(2) sequentially adding the composite calcium-based grease, the composite titanium-based grease, the mother solution, lanthanum oxide, molybdenum disulfide and copper borate into a reaction kettle, and uniformly stirring and mixing to obtain a mixed material;
(3) and grinding the mixed material in a three-roller grinding calender for 4 times, sampling, and testing to be qualified to obtain the high-temperature-resistant lubricating grease.
Example 6
The high-temperature-resistant lubricating grease comprises the following components in percentage by mass:
49.18 percent of compound calcium-based grease
43.0 percent of composite titanium-based grease
2.2 percent of polyisobutylene bis (succinimide)
0.9 percent of benzotriazole fatty acid amine salt
2,6 di-tert-butyl-p-cresol 1.0%
0.4 percent of lanthanum oxide
Molybdenum disulfide 3.1%
0.12 percent of copper borate.
A preparation method of high-temperature-resistant lubricating grease comprises the following steps:
(1) heating and mixing polyisobutylene dibutylimide, benzotriazole fatty acid amine salt and 2, 6-di-tert-butyl-p-cresol uniformly to prepare mother liquor, wherein the heating temperature is 65 ℃;
(2) sequentially adding the composite calcium-based grease, the composite titanium-based grease, the mother solution, lanthanum oxide, molybdenum disulfide and copper borate into a reaction kettle, and uniformly stirring and mixing to obtain a mixed material;
(3) and grinding the mixed material in a three-roller grinding calender for 6 times, sampling, and testing to be qualified to obtain the high-temperature-resistant lubricating grease.
Example 7
49.0 percent of composite calcium-based grease
44.0 percent of composite titanium-based grease
Polyisobutylene bis-succinimide 2.0%
1.0 percent of benzotriazole fatty acid amine salt
2, 6-di-tert-butyl-p-cresol 1.0%
0.5 percent of lanthanum oxide
2.38 percent of molybdenum disulfide
0.12 percent of copper borate.
A preparation method of high-temperature-resistant lubricating grease comprises the following steps:
(1) heating and uniformly mixing the diisobutylene bissuccinimide, the benzotriazole fatty acid amine salt and the 2, 6-di-tert-butyl-p-cresol to prepare a mother solution, wherein the heating temperature is 60 ℃;
(2) sequentially adding the composite calcium-based grease, the composite titanium-based grease, the mother solution, lanthanum oxide, molybdenum disulfide and copper borate into a reaction kettle, and uniformly stirring and mixing to obtain a mixed material;
(3) and grinding the mixed material in a three-roller grinding calender for 5 times, sampling, and testing to be qualified to obtain the high-temperature-resistant lubricating grease.
Example 8
51.0 percent of composite calcium-based grease
42.0 percent of composite titanium-based grease
Polyisobutylene bis-succinimide 1.9%
0.9 percent of benzotriazole fatty acid amine salt
2,6 di-tert-butyl-p-cresol 0.9%
0.5 percent of lanthanum oxide
2.72 percent of molybdenum disulfide
0.08 percent of copper borate.
A preparation method of high-temperature-resistant lubricating grease comprises the following steps:
(1) heating and uniformly mixing polyisobutylene bis-succinimide, benzotriazole fatty acid amine salt and 2, 6-di-tert-butyl-p-cresol to prepare mother liquor, wherein the heating temperature is 64 ℃;
(2) sequentially adding the composite calcium-based grease, the composite titanium-based grease, the mother solution, lanthanum oxide, molybdenum disulfide and copper borate into a reaction kettle, and uniformly stirring and mixing to obtain a mixed material;
(3) and grinding the mixed material in a three-roller grinding calender for 4 times, sampling, and testing to be qualified to obtain the high-temperature-resistant 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 5, and the only difference is that the composite calcium-based grease is replaced by the calcium-based grease.
The preparation method of the grease was the same as that of the high temperature resistant grease in example 5.
Comparative example 2
The components and the mass percentage of each component of the lubricating grease are the same as those in example 5, and the only difference is that the compound calcium-based grease is replaced by the urea-based grease.
The preparation method of the grease was the same as that of the high temperature resistant grease in example 5.
Comparative example 3
The components and the mass percentage of each component of the lubricating grease are the same as those in example 5, and the only difference is that the composite titanium base grease is replaced by the lithium base grease.
The preparation method of the grease was the same as that of the high temperature resistant grease in example 5.
Comparative example 4
A grease whose components and percentages by mass of the components were the same as in example 5, with the only difference that polyisobutylene bis-succinimide was replaced by a succinate ester.
The preparation method of the grease was the same as that of the high temperature resistant grease in example 5.
Comparative example 5
The lubricating grease comprises the following components in percentage by mass:
45 percent of composite calcium-based grease
48 percent of composite titanium-based grease
Polyisobutylene bis-succinimide 1.0%
1.2 percent of benzotriazole fatty acid amine salt
2,6 di-tert-butyl-p-cresol 1.0%
0.8 percent of lanthanum oxide
2.5 percent of molybdenum disulfide
0.5 percent of copper borate.
The preparation method of the grease was the same as that of the high temperature resistant grease in example 5.
Comparative example 6
The lubricating grease comprises the following components in percentage by mass:
55 percent of composite calcium-based grease
38 percent of composite titanium-based grease
Polyisobutylene bis-succinimide 3.0%
1.0 percent of oiliness agent
0.1 percent of antioxidant
0.1 percent of lanthanum oxide
2.5 percent of molybdenum disulfide
0.3% of copper borate;
the oiliness agent is benzotriazole fatty acid amine salt;
the antioxidant is 2, 6-di-tert-butyl-p-cresol.
The preparation method of the grease was the same as that of the high temperature resistant grease in example 5.
Comparative example 7
The components and the mass percentage of each component of the lubricating grease are the same as those in example 5, and the only difference is that one of lanthanum oxide, molybdenum disulfide and copper borate is replaced by graphite.
The preparation method of the grease was the same as that of the high temperature resistant grease in example 5.
Comparative example 8
The lubricating grease comprises the following components in percentage by mass:
46.0 percent of composite calcium-based grease
45.0 percent of composite titanium-based grease
Polyisobutylene bis-succinimide 1.6%
1.0 percent of oiliness agent
1.0 percent of antioxidant
1.0 percent of lanthanum oxide
3.8 percent of molybdenum disulfide
0.6% of copper borate;
the oiliness agent is benzotriazole fatty acid amine salt;
the antioxidant is 2, 6-di-tert-butyl-p-cresol.
The preparation method of the grease was the same as that of the high temperature resistant grease in example 5.
Comparative example 9
The lubricating grease comprises the following components in percentage by mass:
48.9 percent of composite calcium-based grease
45.0 percent of composite titanium-based grease
Polyisobutylene bissuccinimide 2.0%
1.0 percent of oiliness agent
1.0 percent of antioxidant
0.08 percent of lanthanum oxide
2.0 percent of molybdenum disulfide
0.02% of copper borate;
the oiliness agent is benzotriazole fatty acid amine salt;
the antioxidant is 2, 6-di-tert-butyl-p-cresol.
The preparation method of the grease was the same as that of the high temperature resistant grease in example 5.
The above examples and comparative examples were tested for performance, the test types and test methods were as follows:
1. cone penetration: GB/T269-1991;
2. dropping point: GB/T4929-1985;
3. PD value: GB/T12583-98;
4. timken OK value: GB/T11144-2007;
5. 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 high-temperature resistant lubricating grease composite calcium-based grease, the composite titanium-based grease and the polyisobutylene bis-succinimide have a synergistic effect, so that the high-temperature resistant lubricating grease has excellent high-temperature resistance (the dropping point of the high-temperature resistant lubricating grease can reach 400 ℃ at most), and the high-temperature working environment is not carbonized and coked;
the high-temperature resistant lubricating grease has excellent wear resistance (the PD value of a four-ball machine is up to 600 (kgf));
lanthanum oxide and composite titanium-based grease in the high-temperature resistant lubricating grease have a compounding function, so that the high-temperature resistant lubricating grease has excellent friction pair lubrication protection performance (the maximum PD value of a four-ball machine can reach 600(kgf), and the maximum Temken OK value can reach 300N).
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 (7)
1. The high-temperature-resistant lubricating grease is characterized by comprising the following components in percentage by mass:
46.0-53.0% of composite calcium-based grease
40.0-46.0% of composite titanium-based grease
Polyisobutylene bis-succinimide 1.5% -2.3%
0.5-1.2% of oiliness agent
0.1 to 1.0 percent of antioxidant
2.65% -4.6% of an antiwear agent;
wherein:
the compound calcium-based grease is mainly prepared from fatty acid, calcium hydroxide and base oil;
the composite titanium-based grease is mainly prepared from terephthalic acid, stearic acid, an organic titanium compound and base oil;
the antiwear agent comprises the following components in percentage by mass in the high-temperature resistant lubricating grease:
0.1-0.8 percent of lanthanum oxide
2.5 to 3.3 percent of molybdenum disulfide
0.05-0.5% of copper borate.
2. The high-temperature-resistant lubricating grease as claimed in claim 1, characterized by comprising the following components in percentage by mass:
49.0-51.0% of composite calcium-based grease
42.0 to 44.0 percent of composite titanium-based grease
Polyisobutylene bis-succinimide 1.8% -2.2%
0.9-1.1% of oiliness agent
0.8 to 1.0 percent of antioxidant
3.5% -4.0% of an antiwear agent.
3. The high temperature resistant grease of claim 1 wherein the oiliness agent is selected from the group consisting of benzotriazole fatty acid amine salts;
the antioxidant is selected from 2,6 di-tert-butyl-p-cresol.
4. The high-temperature-resistant lubricating grease of claim 1, wherein the antiwear agent comprises the following components in percentage by mass:
0.4 to 0.6 percent of lanthanum oxide
2.8 to 3.1 percent of molybdenum disulfide
0.08% -0.12% of copper borate.
5. A preparation method of high-temperature-resistant lubricating grease, which is applied to the high-temperature-resistant lubricating grease of any one of claims 1 to 4, and is characterized by comprising the following steps:
(1) heating polyisobutylene dibutyldiimide, an antioxidant and an oiliness agent to prepare mother liquor;
(2) uniformly mixing the composite calcium-based grease, the composite titanium-based grease, the mother solution and the antiwear agent;
(3) and (3) grinding the mixed material obtained in the step (2) to obtain the high-temperature-resistant lubricating grease.
6. The preparation method of the high-temperature-resistant lubricating grease as claimed in claim 5, wherein the heating temperature in the step (1) is 60-65 ℃;
sequentially adding the composite calcium-based grease, the composite titanium-based grease, the mother solution, lanthanum oxide, molybdenum disulfide and copper borate into a reaction kettle, and uniformly mixing;
the grinding in the step (3) is carried out on a three-roller grinding calender;
the grinding times in the step (3) are 3-6 times.
7. Use of a high temperature resistant grease according to any one of claims 1-4 for lubricating mechanical equipment.
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