CN112795420A - Ultrahigh-viscosity high-temperature lubricating grease and preparation method thereof - Google Patents
Ultrahigh-viscosity high-temperature lubricating grease and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/04—Elements
- C10M2201/041—Carbon; Graphite; Carbon black
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/10—Compounds containing silicon
- C10M2201/105—Silica
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/102—Aliphatic fractions
- C10M2203/1025—Aliphatic fractions used as base material
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/0206—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers used as base material
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/022—Ethene
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/024—Propene
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- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/026—Butene
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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/127—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids polycarboxylic
- C10M2207/1276—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids polycarboxylic used as thickening agent
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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/128—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof
- C10M2207/1285—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof used as thickening agents
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- C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
- C10M2213/06—Perfluoro polymers
- C10M2213/062—Polytetrafluoroethylene [PTFE]
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- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
- C10M2215/064—Di- and triaryl amines
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- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/22—Heterocyclic nitrogen compounds
- C10M2215/223—Five-membered rings containing nitrogen and carbon only
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- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
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- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
- C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
- C10M2219/066—Thiocarbamic type compounds
- C10M2219/068—Thiocarbamate metal salts
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Abstract
The invention discloses an ultrahigh-viscosity high-temperature lubricating grease and a preparation method thereof, belonging to the field of lubricating grease for complex working conditions, and the technical scheme of the lubricating grease is characterized by comprising the following components: base oil, thickening agent, anti-corrosion additive, antioxidant additive, and viscosity improver; the method for preparing the ultrahigh-viscosity high-temperature lubricating grease comprises the following steps: s1: adding the thickening agent into 1/3 base oil according to the proportion, mixing, stirring and slowly heating; s2: adding 1/3 base oil again, stirring and heating to raise temperature; s3: finally, 1/3 base oil is poured in, and after mixing, the base ester is obtained after homogenizing by a homogenizer or grinding by a grinder; s4: the antioxidant additive, the anti-corrosion additive, the extreme pressure anti-wear agent and the viscosity improver are sequentially added into the obtained base grease, and the mixture is homogenized by a homogenizer or ground by a grinder after being mixed, filtered and packaged to obtain the ultrahigh-viscosity high-temperature lubricating grease.
Description
Technical Field
The invention relates to the field of lubricating grease for complex working conditions, in particular to ultrahigh-viscosity high-temperature lubricating grease and a preparation method thereof.
Background
With the development of times, industrial 4.0 intelligent manufacturing concepts are provided, and China marks the top of industrial technology in China, such as military industry, ship navigation, aerospace and the like. In modern industrial production, some large-scale equipment is influenced by factors such as environmental dust, impact load and vibration, centrifugal force, high temperature and humidity and the like in the operation process, and the condition of lubrication failure is easy to generate. The ultrahigh-viscosity high-temperature lubricating grease is injected into the bearing cavity, and firstly plays a role in sealing and isolating environmental pollution. More importantly, grease enters the surface of a friction pair, and the high-viscosity base oil and the special extreme pressure antiwear agent form a thick and firm oil film and a solid lubricating film on the surface of a bearing, so that the long-acting operation of equipment under the conditions of bearing heavy load, impact load, centrifugal force and vibration is ensured.
Chinese patent No. CN108865340B discloses a lithium complex grease and a preparation method thereof, which comprises 70-90 parts of base oil, 4.5-30.7 parts of stearic acid, 0.8-9.4 parts of dibasic acid and 0.3-4.8 parts of LiOH aqueous solution, and the lithium complex grease is prepared by saponification, saponification dehydration, high temperature refining, cooling, homogenization and other stages. The existing lubricating grease is almost prepared by reacting a lithium hydroxide aqueous solution or oil-soluble lithium hydroxide with two or more inorganic acids or organic acids to generate a thickening agent and then thickening high-viscosity base oil, and the existing preparation method has the disadvantages of long temperature rise dehydration time, high energy consumption, easy uneven dispersion of the thickening agent and influence on the physical and chemical properties of the lubricating grease under the condition of high-viscosity base oil; the traditional antiwear additive has the defect of large limitation of temperature, and can also influence the physical and chemical properties of the lubricating grease.
Disclosure of Invention
The invention aims to provide the ultrahigh-viscosity high-temperature lubricating grease and the preparation method thereof, and the ultrahigh-viscosity high-temperature lubricating grease has the advantage of improving the physical and chemical properties of the lubricating grease.
The technical purpose of the invention is realized by the following technical scheme:
the ultrahigh-viscosity high-temperature lubricating grease comprises the following components in parts by weight: base oil: 60-80 parts; a thickening agent: the using amount is 15-20 parts; anticorrosive additive: 0.5-1 part; antioxidant additive: 0.05-1 part; extreme pressure antiwear agent: 8-10 parts; viscosity-improving agent: 2-4 parts; the preparation method of the ultrahigh-viscosity high-temperature lubricating grease comprises the following steps: s1: adding the thickening agent into 1/3 base oil according to the proportion, mixing, stirring and slowly heating, heating to a specified temperature and then preserving heat for a period of time; s2: adding 1/3 base oil again, stirring and heating to a specified temperature, then preserving heat for a period of time, and stopping heating after the heat preservation time; s3: finally, 1/3 base oil is poured, the mixture is quenched, and then the mixture is homogenized by a homogenizer or ground by a grinder to obtain base ester; s4: and (3) sequentially adding a thickening agent, an antioxidant additive, an anti-corrosion additive, an extreme pressure anti-wear agent and a viscosity modifier into the obtained base grease, mixing, homogenizing by a homogenizer or grinding by a grinder, filtering and packaging to obtain the ultrahigh-viscosity high-temperature lubricating grease.
Further, the base oil is one of mineral oil and polyolefin synthetic base oil or a mixture of the mineral oil and the polyolefin synthetic base oil.
Further, the thickening agent is fatty acid lithium soap or fatty acid calcium soap or a mixture of the fatty acid lithium soap and the fatty acid calcium soap.
Further, the antioxidant additive is an amine compound, a phenol compound or a mixture of the two compounds.
Further, the anti-corrosion additive is sulfonate, benzotriazole or a derivative thereof.
Further, the extreme pressure antiwear agent is a mixture of a plurality of dialkyl dithioformate, sulfur-containing synthetic ester, polymer, nano silicon dioxide and multilayer graphene mixture.
Further, the viscosity improver is polyisobutylene, an ethylene-propylene copolymer or a mixture of the polyisobutylene and the ethylene-propylene copolymer.
Further, in step S1, the temperature is raised to 170-180 ℃.
Further, in step S2, the temperature is raised to 200-210 ℃.
Further, in step S3, after the components are mixed with stirring, two times of grinding are performed.
In conclusion, the invention has the following beneficial effects:
1. the lubricating grease is prepared by adopting a method of adding oil and heating for many times, so that the dispersibility of the base oil is improved, the reaction time is saved, the later-stage dispersion of a thickening agent is facilitated, and the physical and chemical properties of the lubricating grease are further improved;
2. and a newly configured extreme pressure antiwear agent is added, and the extreme pressure antiwear agent can still play an excellent function of repairing the surface defects of the lubricating and friction pair under the harsh conditions of vacuum, radiation, wide temperature and the like, so that the physical and chemical properties of the lubricating grease are further improved.
Drawings
Fig. 1 is a schematic view of the steps of a method for preparing an ultra-high viscosity high temperature grease.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Example 1: the ultrahigh-viscosity high-temperature lubricating grease comprises the following components in parts by weight: base oil: 60 parts of a group II mineral oil; a thickening agent: 15 parts of lithium dodecahydroxystearate soap; antioxidant additives: 0.5 part of diisooctyl diphenylamine and 0.5 part of 2, 6-di-tert-butyl-p-cresol; anticorrosive additive: 0.5 part of benzotriazole derivative; extreme pressure antiwear agent: 4 parts of barium dialkyldithiocarbamate and 2.5 parts of thioamido ester; viscosity-improving agent: 1 part of polyisobutylene and 1 part of an ethylene-propylene copolymer.
The preparation method of the ultrahigh-viscosity high-temperature grease comprises the following steps as shown in figure 1:
s1: 25 parts of group II mineral oil and 15 parts of lithium dodecahydroxystearate soap are mixed and the temperature is raised to 180 ℃.
S2: 25 parts of group II mineral oil are added and the temperature is raised to 210 ℃.
S3: 25 parts of group II mineral oil are added and the mixture is ground twice to give the base ester.
S4: adding 0.5 part of diisooctyl diphenylamine, 0.5 part of 2, 6-di-tert-butyl-p-cresol, 0.5 part of benzotriazole derivative, 4 parts of barium dialkyl dithiocarbamate, 2.5 parts of amino sulfurized ester, 1 part of polyisobutylene and 1 part of ethylene-propylene copolymer, stirring, grinding twice, filtering and packaging to obtain the finished product of the lubricating grease.
Example 2: the ultrahigh-viscosity high-temperature lubricating grease comprises the following components in parts by weight: base oil: 75 parts of a group II mineral oil and polyalphaolefin blended base oil; a thickening agent: 11 parts of lithium dodecahydroxystearate soap, 1 part of calcium dodecahydroxystearate soap and 2 parts of lithium sebacate soap; antioxidant additives: 0.5 part of diisooctyl diphenylamine, 0.5 part of 2, 6-di-tert-butyl-p-cresol and an anti-corrosion additive: 0.5 part of benzotriazole derivative; extreme pressure antiwear agent: 4 parts of barium dialkyldithiocarbamate and 2.5 parts of thioamido ester; viscosity-improving agent: 1 part of polyisobutylene and 1 part of an ethylene-propylene copolymer.
The preparation method of the ultrahigh-viscosity high-temperature grease comprises the following steps as shown in figure 1:
s1: mixing 25 parts of group II mineral oil and poly-alpha-olefin blended base oil, 11 parts of lithium dodecahydroxystearate soap, 1 part of calcium dodecahydroxystearate soap and 2 parts of lithium sebacate soap, and heating to 180 ℃.
S2: adding 25 parts of II-type mineral oil and poly-alpha-olefin blended base oil, and heating to 210 ℃.
S3: adding 25 parts of group II mineral oil and polyalphaolefin blended base oil, and grinding the mixture twice to obtain the base ester.
S4: adding 0.5 part of diisooctyl diphenylamine, 0.5 part of 2, 6-di-tert-butyl-p-cresol, 0.5 part of benzotriazole derivative, 4 parts of barium dialkyl dithiocarbamate, 2.5 parts of amino sulfurized ester, 1 part of polyisobutene and 1 part of ethylene-propylene copolymer, stirring, grinding twice, filtering and packaging to obtain the finished product of the lubricating grease.
Example 3: the ultrahigh-viscosity high-temperature lubricating grease comprises the following components in parts by weight: base oil: 75 parts of a group II mineral oil and polyalphaolefin blended base oil; a thickening agent: 11 parts of lithium dodecahydroxystearate soap and 1 part of calcium dodecahydroxystearate; 2 parts of lithium sebacate soap; antioxidant additives: 0.5 part of diisooctyl diphenylamine and 0.5 part of 2, 6-di-tert-butyl-p-cresol; anticorrosive additive: 0.5 part of benzotriazole derivative; extreme pressure antiwear agent: 3 parts of barium dialkyl dithiocarbamate, 2.5 parts of amino sulfenyl ester and 1 part of nano silicon dioxide; viscosity-improving agent: 1 part of polyisobutylene and 1 part of an ethylene-propylene copolymer.
The preparation method of the ultrahigh-viscosity high-temperature grease comprises the following steps as shown in figure 1:
s1: mixing 25 parts of group II mineral oil and poly-alpha-olefin blended base oil, 11 parts of lithium dodecahydroxystearate soap, 1 part of calcium dodecahydroxystearate and 2 parts of lithium sebacate soap, and heating to 180 ℃.
S2: adding 25 parts of II-type mineral oil and poly-alpha-olefin blended base oil, and heating to 210 ℃.
S3: adding 25 parts of group II mineral oil and polyalphaolefin blended base oil, and grinding the mixture twice to obtain the base ester.
S4: adding 0.5 part of diisooctyl diphenylamine, 0.5 part of 2, 6-di-tert-butyl-p-cresol, 0.5 part of benzotriazole derivative, 3 parts of barium dialkyl dithiocarbamate, 2.5 parts of amino sulfurized ester, 1 part of nano silicon dioxide, 1 part of polyisobutylene and 1 part of ethylene-propylene copolymer, stirring, grinding twice, filtering and packaging to obtain the finished product of the lubricating grease.
Example 4: the ultrahigh-viscosity high-temperature lubricating grease comprises the following components in parts by weight: base oil: 80 parts of a group II mineral oil and polyalphaolefin blended base oil; a thickening agent: 11 parts of lithium dodecahydroxystearate soap, 1 part of calcium dodecahydroxystearate and 2 parts of lithium sebacate soap; antioxidant additives: 0.5 part of diisooctyl diphenylamine and 0.5 part of 2, 6-di-tert-butyl-p-cresol; anticorrosive additive: 0.5 part of benzotriazole derivative; extreme pressure antiwear agent: 2 parts of barium dialkyl dithiocarbamate, 1.5 parts of amino thionated ester, 1 part of nano silicon dioxide and 1 part of multilayer graphene; viscosity-improving agent: 1 part of polytetrafluoroethylene, 1 part of polyisobutylene and 1 part of ethylene-propylene copolymer.
The preparation method of the ultrahigh-viscosity high-temperature grease comprises the following steps as shown in figure 1:
s1: mixing 25 parts of group II mineral oil and poly-alpha-olefin blended base oil, 11 parts of lithium dodecahydroxystearate soap, 1 part of calcium dodecahydroxystearate and 2 parts of lithium sebacate soap, and heating to 180 ℃.
S2: adding 25 parts of II-type mineral oil and poly-alpha-olefin blended base oil, and heating to 210 ℃.
S3: adding 25 parts of group II mineral oil and poly-alpha-olefin split base oil, and grinding the mixture twice to obtain the base ester.
S4: adding 0.5 part of diisooctyl diphenylamine, 0.5 part of 2, 6-di-tert-butyl-p-cresol, 0.5 part of benzotriazole derivative, 2 parts of barium dialkyl dithiocarbamate, 1.5 parts of amino sulfurized ester, 1 part of nano silicon dioxide, 1 part of multilayer graphene, 1 part of polytetrafluoroethylene, 1 part of polyisobutylene and 1 part of ethylene-propylene copolymer, stirring, grinding twice, filtering and packaging to obtain the finished product of the lubricating grease.
Experimental example:
the results of the physicochemical tests conducted on the ultrahigh-viscosity high-temperature greases of examples 1 to 4 and the greases YEH to 328 purchased on the market as comparative examples are shown in Table 1.
Preparation of the experiment: the grease of examples 1-4 and YEH-328 were used in equal amounts by the experimenter.
The test method comprises the following steps: the dropping point test adopts GB/T3498; the working cone penetration adopts GB/T269; the corrosion adopts GB/T7326B method; the corrosion resistance adopts GB/T5018; the water leaching loss adopts SH/T0109; the extreme pressure property adopts SH/T0202.
TABLE 1
From the above-mentioned test structure of the related physical and chemical properties, it can be seen that the greases of examples 1-4 are superior to the existing greases in performance, of which example 4 has the best physical and chemical properties.
The dropping point of examples 1 to 4 is much higher than that of the comparative grease, and the higher the dropping point of the grease, the higher the use temperature of the grease.
Examples 1-4 working penetration and extended working penetration were much greater than those of comparative greases, with greater working penetration indicating greases were more viscous. When mechanical lubrication is performed, the condition of lubricating grease loss is not easy to occur.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. An ultrahigh-viscosity high-temperature lubricating grease is characterized in that: the paint comprises the following components in parts by weight: base oil: 60-80 parts; a thickening agent: the using amount is 15-20 parts; anticorrosive additive: 0.5-1 part; antioxidant additive: 0.05-1 part; extreme pressure antiwear agent: 8-10 parts; viscosity-improving agent: 2-4 parts; the preparation method of the ultrahigh-viscosity high-temperature lubricating grease comprises the following steps:
s1: adding the thickening agent into 1/3 base oil according to the proportion, mixing, stirring and slowly heating, heating to a specified temperature and then preserving heat for a period of time;
s2: adding 1/3 base oil again, stirring and heating to a specified temperature, then preserving heat for a period of time, and stopping heating after the heat preservation time;
s3: finally, 1/3 base oil is poured, the mixture is quenched, and then the mixture is homogenized by a homogenizer or ground by a grinder to obtain base ester;
s4: and (3) sequentially adding a thickening agent, an antioxidant additive, an anti-corrosion additive, an extreme pressure anti-wear agent and a viscosity modifier into the obtained base grease, mixing, homogenizing by a homogenizer or grinding by a grinder, filtering and packaging to obtain the ultrahigh-viscosity high-temperature lubricating grease.
2. The ultrahigh-viscosity high-temperature grease of claim 1, which is characterized in that: the base oil is one of mineral oil and polyolefin synthetic base oil or a mixture of the mineral oil and the polyolefin synthetic base oil.
3. The ultra-high viscosity high temperature grease of claim 1, wherein: the thickening agent is fatty acid lithium soap or fatty acid calcium soap or a mixture of the fatty acid lithium soap and the fatty acid calcium soap.
4. The ultra-high viscosity high temperature grease of claim 1, wherein: the antioxidant additive is an amine compound, a phenol compound or a mixture of the two compounds.
5. The ultra-high viscosity high temperature grease of claim 1, wherein: the anti-corrosion additive is sulfonate, benzotriazole or derivatives thereof.
6. The ultra-high viscosity high temperature grease of claim 1, wherein: the extreme pressure antiwear agent is a mixture of a plurality of dialkyl dithiocarbamate, sulfur-containing synthetic ester, polymer, nano silicon dioxide and multilayer graphene mixture.
7. The ultra-high viscosity high temperature grease of claim 1, wherein: the viscosity improver is polyisobutylene, ethylene-propylene copolymer or a mixture of the polyisobutylene and the ethylene-propylene copolymer.
8. The method for preparing the ultrahigh-viscosity high-temperature grease of claim 1, wherein the method comprises the following steps: in step S1, the temperature is raised to 170-180 ℃.
9. The method for preparing the ultrahigh-viscosity high-temperature grease of claim 1, wherein the method comprises the following steps: in step S2, the temperature is raised to a temperature in the range of 200 to 210 ℃.
10. The method for preparing the ultrahigh-viscosity high-temperature grease of claim 1, wherein the method comprises the following steps: in step S3, after the components are mixed with stirring, two times of grinding are performed.
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| CN115521819A (en) * | 2022-10-08 | 2022-12-27 | 无锡飞天润滑油科技股份有限公司 | High-temperature lubricating grease for pipeline and preparation method thereof |
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