CN109943402B - Synthetic low-carbon type ultrahigh-temperature lubricating grease and preparation method thereof - Google Patents
Synthetic low-carbon type ultrahigh-temperature lubricating grease and preparation method thereof Download PDFInfo
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Abstract
A synthetic low-carbon type ultrahigh-temperature lubricating grease and a preparation method thereof comprise trimellitate, polyisobutylene, polyurea and functional additives; wherein the polyurea includes MDI, tallow amine and cyclohexylamine; the functional additives comprise a high-temperature antioxidant, a copper corrosion resistant additive, a ferrous metal antirust preservative, a flame-retardant lubricant, a flame-retardant smoke suppressor and an ultrahigh-temperature solid lubricant. Firstly, preparing synthetic polyurea grease in a grease preparing kettle; then, heating the materials in the kettle to 120-130 ℃ until the water in the kettle is completely driven out; the temperature of the contents was raised to 170. + -. 3 ℃ and maintained at this temperature for about 10 minutes. And starting a cooling system, and when the temperature of the materials in the kettle is reduced to 150 ℃, sequentially metering and adding the functional additives to obtain the synthetic low-carbon type ultrahigh-temperature lubricating grease. The product of the invention has the advantages of comprehensive and excellent performance, strong bearing capacity, good wear resistance and friction reduction, good adhesion, strong high temperature resistance and ultrahigh temperature resistance, low carbon deposition tendency, long service life and high cost performance.
Description
Technical Field
The invention relates to synthetic low-carbon type ultrahigh-temperature lubricating grease and a preparation method thereof, belonging to the technical field of chemical material reaction and combination.
Background
At present, in the industries of metallurgy, steel, petrifaction, chemical industry and the like, a plurality of devices are in high-temperature or ultrahigh-temperature working environments. Like the front track bearing of a steel plant, the front track bearing is directly exposed to the radiation and baking of high-temperature molten iron (molten steel) above 1000 ℃, and the working environment is extremely severe.
It is known that lithium molybdenum disulfide base grease, composite calcium sulfonate grease added with molybdenum disulfide, and the like are commonly used for bearings in these working environments. These greases have significant disadvantages: 1. the dropping point of the molybdenum disulfide lithium base grease is low, the use temperature is low, and grease loss is easy to cause during work; 2. the bearing contains high-viscosity mineral oil, and is easy to coke at high temperature, so that accidents such as shaft clamping or bearing locking are caused; 3. a large amount of coke smoke is easily generated and even ignited in the using process; 4. the maximum service temperature of the molybdenum disulfide is 350 ℃, and the service condition of ultrahigh temperature cannot be met; 5. molybdenum disulfide is oxidized at high temperatures and can be corrosive to metals.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the synthetic low-carbon type ultrahigh-temperature lubricating grease and the preparation method thereof, and the synthetic low-carbon type ultrahigh-temperature lubricating grease has the advantages of strong bearing capacity, good wear resistance and friction reduction, good adhesion, and strong high temperature resistance (250 ℃) and ultrahigh temperature performance (2200 ℃); because trimellitate base oil, polyurea and ashless functional additives (except magnesium hydroxide and zirconium oxide) with extremely low carbon deposition tendency are used in the formula, the carbon deposition tendency of the product is extremely low, the service life is long, and the cost performance is high.
The technical scheme for solving the technical problems is as follows: the synthetic low-carbon type ultrahigh-temperature lubricating grease comprises the following components in parts by weight:
100 parts of synthetic urea-based grease: the adhesive comprises 74-85 parts of trimellitate, 10-15 parts of polyisobutylene and 5-11 parts of polyurea;
12.9-38.9 parts of functional additive: 0.5-3 parts of high-temperature antioxidant, 0.1-0.3 part of copper corrosion resistant additive, 0.1-0.8 part of ferrous metal antirust preservative, 2-8 parts of flame-retardant lubricant, 5-12 parts of flame-retardant smoke suppressor and 5-15 parts of ultrahigh-temperature solid lubricant;
in the polyurea, 2-4.4 parts of MDI, 2-4.4 parts of tallow amine and 1-2.2 parts of cyclohexylamine are used.
As a preferable scheme for synthesizing the low-carbon type ultrahigh-temperature lubricating grease, the trimellitate is SDPZ-2 and/or SDPZ-3; the polyisobutylene is PIB 2400; the MDI is WANNATE MDI-100; the tallow amine is straight-run non-hydrogenated tallow amine.
As a preferable scheme for synthesizing the low-carbon type ultrahigh-temperature lubricating grease, the high-temperature antioxidant is diisooctyl diphenylamine T516Z; the copper corrosion resistant additive is T706; the ferrous metal antirust preservative is alkenyl succinic acid T746; the flame retardant lubricant is MCA; the flame-retardant smoke suppressor is nano-scale magnesium hydroxide; the ultrahigh-temperature solid lubricant is nano-grade zirconia.
The embodiment of the invention also provides a preparation method of the synthetic low-carbon type ultrahigh-temperature lubricating grease, which is characterized by comprising the following steps of:
1) according to the production capacity, accurately metering 60-90% of trimellitate and all polyisobutylene in a fat-making kettle, stirring and heating to 70-75 ℃;
2) adding tallow amine and cyclohexylamine into a grease making kettle in a metering manner, and stirring until the tallow amine is completely dissolved;
3) adding the residual trimellitate into an MDI (diphenyl-methane-diisocyanate) melting kettle in a metering manner, and stirring and heating to 70-75 ℃; metering MDI, and stirring until the MDI is completely melted and transparent;
4) under the condition of stirring of the grease making kettle, slowly pumping the MDI solution into the grease making kettle, and heating the MDI solution under stirring to enable the materials in the grease making kettle to react for 30 +/-2 minutes at a constant temperature of 85-95 ℃;
5) adding weighed purified water into a fat preparation kettle, and continuously stirring at constant temperature for reaction for 15 +/-1 minutes;
6) heating the materials in the fat making kettle to 120-130 ℃ under stirring, and keeping the temperature for 10-30 minutes;
7) heating the materials in the fat making kettle to 170 +/-3 ℃, stopping heating, and starting a cooling cycle;
8) when the temperature in the fat making kettle is reduced to 150 ℃, stopping stirring and stopping cooling circulation; adding all the functional additives in sequence at one time; stirring is continued for 20 minutes to obtain the synthetic low-carbon type ultrahigh-temperature lubricating grease.
The preferable scheme of the preparation method of the synthetic low-carbon type ultrahigh-temperature lubricating grease is that the trimellitate accounts for 74-85 parts, and the polyisobutylene accounts for 10-15 parts.
As a preferable scheme of the preparation method for synthesizing the low-carbon type ultrahigh-temperature lubricating grease, the trimellitate is SDPZ-2 and/or SDPZ-3; the polyisobutylene is PIB 2400.
As a preferable scheme of the preparation method of the synthetic low-carbon type ultrahigh-temperature lubricating grease, 2-4.4 parts of MDI, 2-4.4 parts of tallow amine and 1-2.2 parts of cyclohexylamine are adopted.
As a preferable scheme of the preparation method of the synthetic low-carbon type ultrahigh-temperature lubricating grease, the MDI is WANNATE MDI-100; the tallow amine is straight-run non-hydrogenated tallow amine.
As a preferable scheme of the preparation method of the synthetic low-carbon type ultrahigh-temperature lubricating grease, 12.9-38.9 parts of functional additive: 0.5-3 parts of high-temperature antioxidant, 0.1-0.3 part of copper corrosion resistant additive, 0.1-0.8 part of ferrous metal antirust preservative, 2-8 parts of flame-retardant lubricant, 5-12 parts of flame-retardant smoke suppressor and 5-15 parts of ultrahigh-temperature solid lubricant.
As a preferred scheme for synthesizing the low-carbon type ultrahigh-temperature lubricating grease, the high-temperature antioxidant is diisooctyl diphenylamine T516Z; the copper corrosion resistant additive is T706; the ferrous metal antirust preservative is alkenyl succinic acid T746; the flame retardant lubricant is MCA; the flame-retardant smoke suppressor is nano-scale magnesium hydroxide; the ultrahigh-temperature solid lubricant is nano-grade zirconia.
The invention has the beneficial effects that: the lubricating grease has excellent comprehensive performance and high cost performance: the lubricating grease has the advantages of strong bearing capacity, good antifriction and abrasion resistance, good adhesion, strong high temperature resistance, excellent capability of resisting over 1000 ℃ of ultrahigh temperature, extremely low carbon deposition tendency, less smoke in the using process, difficult ignition and long service life, and is particularly suitable for lubricating heavy-load bearings working in high-temperature and/or ultrahigh-temperature environments.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying tables. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to table 1, the compositions and proportions of the raw materials for synthesizing the low-carbon type ultra-high temperature grease provided in examples 1 to 7 of the present invention are shown.
Table 1 composition and ratio of raw materials for synthesizing low-carbon type ultra-high temperature grease
Wherein the amount of purified water of each example is determined according to the amount of MDI 100, 1 part of MDI 100 corresponds to 0.0887 parts of purified water, and the amount of purified water of the examples is rounded to an approximate number.
Example 1:
the embodiment 1 of the invention provides a synthetic low-carbon type ultrahigh-temperature lubricating grease which comprises the following components in parts by weight:
100kg of synthetic urea-based grease: 85kg of trimellitate, 10kg of polyisobutylene and 5kg of polyurea;
12.9kg of functional additive: 0.5kg of high-temperature antioxidant, 0.3kg of copper corrosion resisting additive, 0.1kg of ferrous metal antirust preservative, 2kg of flame-retardant lubricant, 5kg of flame-retardant smoke suppressor and 5kg of ultrahigh-temperature solid lubricant;
5kg of polyurea had 2kg of MDI, 2kg of tallow amine and 1kg of cyclohexylamine.
The preparation method of the synthetic low-carbon type ultrahigh-temperature lubricating grease in the embodiment 1 comprises the following steps:
1) accurately metering 51-76.5 kg of trimellitate and 10kg of polyisobutylene in a fat-making kettle according to the production quantity, stirring and heating to 70-75 ℃;
2) 2kg of tallow amine and 1kg of cyclohexylamine are metered into a grease making kettle and stirred until the tallow amine is completely dissolved;
3) adding the residual trimellitate into an MDI (diphenyl-methane-diisocyanate) melting kettle in a metering manner, and stirring and heating to 70-75 ℃; 2kg of MDI are metered in and stirred until the MDI is completely melted and transparent;
4) under the condition of stirring of the grease making kettle, slowly pumping the MDI solution into the grease making kettle, and heating the MDI solution under stirring to enable the materials in the grease making kettle to react for 30 +/-2 minutes at a constant temperature of 85-95 ℃;
5) adding 0.18Kg of weighed purified water into a fat making kettle, and continuously stirring at constant temperature for reaction for 15 +/-1 minutes;
6) heating the materials in the fat making kettle to 120-130 ℃ under stirring, and keeping the temperature at 120-130 ℃ for 10-30 minutes;
7) heating the materials in the fat making kettle to 170 +/-3 ℃, stopping heating, and starting a cooling cycle;
8) when the temperature in the fat making kettle is reduced to 150 ℃, stopping stirring and stopping cooling circulation; adding 12.9kg of functional additives into the mixture in turn at one time; stirring is continued for 20 minutes to obtain the synthetic low-carbon type ultrahigh-temperature lubricating grease.
Example 2:
the embodiment 2 of the invention provides a synthetic low-carbon type ultrahigh-temperature lubricating grease which comprises the following components in parts by weight:
100kg of synthetic urea-based grease: 84kg of trimellitate, 10kg of polyisobutylene and 6kg of polyurea;
20.4kg of functional additive: 0.8kg of high-temperature antioxidant, 0.3kg of copper corrosion resisting additive, 0.3kg of ferrous metal antirust preservative, 3kg of flame-retardant lubricant, 8kg of flame-retardant smoke suppressor and 8kg of ultrahigh-temperature solid lubricant;
6kg of polyurea had 2.4kg of MDI, 2.4kg of tallow amine and 1.2kg of cyclohexylamine.
The preparation method of the synthetic low-carbon type ultrahigh-temperature lubricating grease in the embodiment 2 comprises the following steps:
1) accurately metering 50.4-75.6 kg of trimellitate and 10kg of polyisobutylene in a fat preparation kettle according to the production amount, stirring and heating to 70-75 ℃;
2) 2.4kg of tallow amine and 1.2kg of cyclohexylamine are metered into a grease making kettle and stirred until the tallow amine is completely dissolved;
3) adding the residual trimellitate into an MDI (diphenyl-methane-diisocyanate) melting kettle in a metering manner, and stirring and heating to 70-75 ℃; 2.4kg of MDI are metered in and stirred until the MDI is completely melted and transparent;
4) under the condition of stirring of the grease making kettle, slowly pumping the MDI solution into the grease making kettle, and heating the MDI solution under stirring to enable the materials in the grease making kettle to react for 30 +/-2 minutes at a constant temperature of 85-95 ℃;
5) adding 0.22 weight percent of purified water into the fat making kettle, and continuously stirring at constant temperature for reaction for 15 +/-1 minutes;
6) heating the materials in the fat making kettle to 120-130 ℃ under stirring, and keeping the temperature at 120-130 ℃ for 10-30 minutes;
7) heating the materials in the fat making kettle to 170 +/-3 ℃, stopping heating, and starting a cooling cycle;
8) when the temperature in the fat making kettle is reduced to 150 ℃, stopping stirring and stopping cooling circulation; sequentially adding 20.4kg of functional additives in one step; stirring is continued for 20 minutes to obtain the synthetic low-carbon type ultrahigh-temperature lubricating grease.
Example 3:
the embodiment 3 of the invention provides a synthetic low-carbon type ultrahigh-temperature lubricating grease which comprises the following components in parts by weight:
100kg of synthetic urea-based grease: trimellitate was 81g, polyisobutylene 11.5kg, polyurea 7.5 kg;
26.7kg of functional additive: 1kg of high-temperature antioxidant, 0.3kg of copper corrosion resisting additive, 0.4kg of ferrous metal antirust preservative, 5kg of flame-retardant lubricant, 10kg of flame-retardant smoke suppressor and 10kg of ultrahigh-temperature solid lubricant;
7.5kg of polyurea had 3kg of MDI, 3kg of tallow amine and 1.5kg of cyclohexylamine.
The preparation method of the synthetic low-carbon type ultrahigh-temperature lubricating grease in the embodiment 3 comprises the following steps:
1) according to the production capacity, accurately metering 48.6-72.9 kg of trimellitate and 11.5kg of polyisobutylene in a fat-making kettle, stirring and heating to 70-75 ℃;
2) 3kg of tallow amine and 1.5kg of cyclohexylamine are metered into a grease making kettle and stirred until the tallow amine is completely dissolved;
3) adding the residual trimellitate into an MDI (diphenyl-methane-diisocyanate) melting kettle in a metering manner, and stirring and heating to 70-75 ℃; 3kg of MDI was metered in and stirred until the MDI was completely melted and transparent;
4) under the condition of stirring of the grease making kettle, slowly pumping the MDI solution into the grease making kettle, and heating the MDI solution under stirring to enable the materials in the grease making kettle to react for 30 +/-2 minutes at a constant temperature of 85-95 ℃;
5) adding 0.27Kg of weighed purified water into a fat making kettle, and continuously stirring at constant temperature for reaction for 15 +/-1 minutes;
6) heating the materials in the fat making kettle to 120-130 ℃ under stirring, and keeping the temperature at 120-130 ℃ for 10-30 minutes;
7) heating the materials in the fat making kettle to 170 +/-3 ℃, stopping heating, and starting a cooling cycle;
8) when the temperature in the fat making kettle is reduced to 150 ℃, stopping stirring and stopping cooling circulation; adding 26.7kg of functional additives into the mixture in turn at one time; stirring is continued for 20 minutes to obtain the synthetic low-carbon type ultrahigh-temperature lubricating grease.
Example 4:
the embodiment 4 of the invention provides a synthetic low-carbon type ultrahigh-temperature lubricating grease which comprises the following components in parts by weight:
100kg of synthetic urea-based grease: 80g of trimellitate, 12kg of polyisobutylene and 8kg of polyurea;
29.2kg of functional additive: 1.5kg of high-temperature antioxidant, 0.2kg of copper corrosion resisting additive, 0.5kg of ferrous metal antirust preservative, 6kg of flame-retardant lubricant, 10kg of flame-retardant smoke suppressor and 11kg of ultrahigh-temperature solid lubricant;
8kg of polyurea had 3.2kg of MDI, 3.2kg of tallow amine and 1.6kg of cyclohexylamine.
The preparation method of the synthetic low-carbon type ultrahigh-temperature lubricating grease in the embodiment 4 comprises the following steps:
1) according to the production capacity, accurately metering 48-72 kg of trimellitate and 12kg of polyisobutylene in a fat preparation kettle, stirring and heating to 70-75 ℃;
2) 3.2kg of tallow amine and 1.6kg of cyclohexylamine are metered into a grease making kettle and stirred until the tallow amine is completely dissolved;
3) adding the residual trimellitate into an MDI (diphenyl-methane-diisocyanate) melting kettle in a metering manner, and stirring and heating to 70-75 ℃; 3.2kg of MDI are metered in and stirred until the MDI is completely melted and transparent;
4) under the condition of stirring of the grease making kettle, slowly pumping the MDI solution into the grease making kettle, and heating the MDI solution under stirring to enable the materials in the grease making kettle to react for 30 +/-2 minutes at a constant temperature of 85-95 ℃;
5) adding 0.29Kg of weighed purified water into a fat making kettle, and continuously stirring at constant temperature for reaction for 15 +/-1 minutes;
6) heating the materials in the fat making kettle to 120-130 ℃ under stirring, and keeping the temperature at 120-130 ℃ for 10-30 minutes;
7) heating the materials in the fat making kettle to 170 +/-3 ℃, stopping heating, and starting a cooling cycle;
8) when the temperature in the fat making kettle is reduced to 150 ℃, stopping stirring and stopping cooling circulation; adding 29.2kg of functional additives into the mixture in turn at one time; stirring is continued for 20 minutes to obtain the synthetic low-carbon type ultrahigh-temperature lubricating grease.
Example 5:
the embodiment 5 of the invention provides a synthetic low-carbon type ultrahigh-temperature lubricating grease which comprises the following components in parts by weight:
100kg of synthetic urea-based grease: 78g of trimellitate, 13kg of polyisobutene and 9kg of polyurea;
31.8kg of functional additive: 2kg of high-temperature antioxidant, 0.2kg of copper corrosion resisting additive, 0.6kg of ferrous metal antirust preservative, 6kg of flame-retardant lubricant, 11kg of flame-retardant smoke suppressor and 12kg of ultrahigh-temperature solid lubricant;
9kg of polyurea had 3.6kg of MDI, 3.6kg of tallow amine and 1.8kg of cyclohexylamine.
The preparation method of the synthetic low-carbon type ultrahigh-temperature lubricating grease in the embodiment 5 comprises the following steps:
1) according to the production capacity, accurately metering 46.8-70.2 kg of trimellitate and 13kg of polyisobutylene in a fat-making kettle, stirring and heating to 70-75 ℃;
2) 3.6kg of tallow amine and 1.8kg of cyclohexylamine are metered into a grease making kettle and stirred until the tallow amine is completely dissolved;
3) adding the residual trimellitate into an MDI (diphenyl-methane-diisocyanate) melting kettle in a metering manner, and stirring and heating to 70-75 ℃; 3.6kg of MDI are metered in and stirred until the MDI is completely melted and transparent;
4) under the condition of stirring of the grease making kettle, slowly pumping the MDI solution into the grease making kettle, and heating the MDI solution under stirring to enable the materials in the grease making kettle to react for 30 +/-2 minutes at a constant temperature of 85-95 ℃;
5) adding 0.32Kg of weighed purified water into a fat making kettle, and continuously stirring at constant temperature for reaction for 15 +/-1 minutes;
6) heating the materials in the fat making kettle to 120-130 ℃ under stirring, and keeping the temperature at 120-130 ℃ for 10-30 minutes;
7) heating the materials in the fat making kettle to 170 +/-3 ℃, stopping heating, and starting a cooling cycle;
8) when the temperature in the fat making kettle is reduced to 150 ℃, stopping stirring and stopping cooling circulation; adding 31.8kg of functional additives into the mixture in sequence at one time; stirring is continued for 20 minutes to obtain the synthetic low-carbon type ultrahigh-temperature lubricating grease.
Example 6:
the embodiment 6 of the invention provides a synthetic low-carbon type ultrahigh-temperature lubricating grease which comprises the following components in parts by weight:
100kg of synthetic urea-based grease: 76g of trimellitate, 14kg of polyisobutene and 10kg of polyurea;
35.3kg of functional additive: 2.5kg of high-temperature antioxidant, 0.1kg of copper corrosion resisting additive, 0.7kg of ferrous metal antirust preservative, 7kg of flame-retardant lubricant, 11kg of flame-retardant smoke suppressor and 14kg of ultrahigh-temperature solid lubricant;
in 10kg of polyurea, 4kg of MDI, 4kg of tallow amine and 2kg of cyclohexylamine were used.
The preparation method of the synthetic low-carbon type ultrahigh-temperature lubricating grease in the embodiment 6 comprises the following steps:
1) accurately metering 45.6-68.4 kg of trimellitate and 14kg of polyisobutylene in a fat preparation kettle according to the production amount, stirring and heating to 70-75 ℃;
2) 4kg of tallow amine and 2kg of cyclohexylamine are metered into a grease making kettle and stirred until the tallow amine is completely dissolved;
3) adding the residual trimellitate into an MDI (diphenyl-methane-diisocyanate) melting kettle in a metering manner, and stirring and heating to 70-75 ℃; 4kg of MDI are metered in and stirred until the MDI is completely melted and transparent;
4) under the condition of stirring of the grease making kettle, slowly pumping the MDI solution into the grease making kettle, and heating the MDI solution under stirring to enable the materials in the grease making kettle to react for 30 +/-2 minutes at a constant temperature of 85-95 ℃;
5) adding 0.36Kg of weighed purified water into a fat making kettle, and continuously stirring at constant temperature for reaction for 15 +/-1 minutes;
6) heating the materials in the fat making kettle to 120-130 ℃ under stirring, and keeping the temperature at 120-130 ℃ for 10-30 minutes;
7) heating the materials in the fat making kettle to 170 +/-3 ℃, stopping heating, and starting a cooling cycle;
8) when the temperature in the fat making kettle is reduced to 150 ℃, stopping stirring and stopping cooling circulation; adding 35.3kg of functional additives into the mixture in turn at one time; stirring is continued for 20 minutes to obtain the synthetic low-carbon type ultrahigh-temperature lubricating grease.
Example 7:
embodiment 7 of the invention provides a synthetic low-carbon type ultrahigh-temperature lubricating grease which comprises the following components in parts by weight:
100kg of synthetic urea-based grease: trimellitate is 74g, polyisobutylene is 15kg, and polyurea is 11 kg;
38.9kg of functional additive: 3kg of high-temperature antioxidant, 0.1kg of copper corrosion resisting additive, 0.8kg of ferrous metal antirust preservative, 8kg of flame-retardant lubricant, 12kg of flame-retardant smoke suppressor and 15kg of ultrahigh-temperature solid lubricant;
11kg of polyurea had 4.4kg of MDI, 4.4kg of tallow amine and 2kg of cyclohexylamine.
The preparation method of the synthetic low-carbon type ultrahigh-temperature lubricating grease in the embodiment 6 comprises the following steps:
1) according to the production capacity, accurately metering 44.4-66.6 kg of trimellitate and 15kg of polyisobutylene in a fat-making kettle, stirring and heating to 70-75 ℃;
2) 4.4kg of tallow amine and 2kg of cyclohexylamine are metered into a grease making kettle and stirred until the tallow amine is completely dissolved;
3) adding the residual trimellitate into an MDI (diphenyl-methane-diisocyanate) melting kettle in a metering manner, and stirring and heating to 70-75 ℃; 4.4kg of MDI are metered in and stirred until the MDI is completely melted and transparent;
4) under the condition of stirring of the grease making kettle, slowly pumping the MDI solution into the grease making kettle, and heating the MDI solution under stirring to enable the materials in the grease making kettle to react for 30 +/-2 minutes at a constant temperature of 85-95 ℃;
5) adding 0.39Kg of weighed purified water into a fat making kettle, and continuously stirring at constant temperature for reaction for 15 +/-1 minutes;
6) heating the materials in the fat making kettle to 120-130 ℃ under stirring, and keeping the temperature at 120-130 ℃ for 10-30 minutes;
7) heating the materials in the fat making kettle to 170 +/-3 ℃, stopping heating, and starting a cooling cycle;
8) when the temperature in the fat making kettle is reduced to 150 ℃, stopping stirring and stopping cooling circulation; adding 38.9kg of functional additives in turn at one time; stirring is continued for 20 minutes to obtain the synthetic low-carbon type ultrahigh-temperature lubricating grease.
See table 2 for performance data for the most preferred embodiment 3 of the present invention.
Table 2 performance data for synthetic low-carbon ultra-high temperature greases of best example 3
The lubricating grease produced by the technical scheme of the invention has the advantages of excellent comprehensive performance, high cost performance, strong bearing capacity, good antifriction and wear resistance, good adhesion, strong high temperature resistance and excellent capability of resisting ultrahigh temperature of more than 1000 ℃, and because the trimellitate base oil, polyurea and ashless functional additives (except magnesium hydroxide and zirconium oxide) with extremely low carbon deposition tendency are used in the formula, the carbon deposition tendency of the product is extremely low, the smoke is less in the using process, the fire is not easy to occur, the use safety is high, the service life is long, and the lubricating grease is particularly suitable for lubricating heavy-load bearings working in high-temperature and/ultrahigh-temperature environments.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. The synthetic low-carbon type ultrahigh-temperature lubricating grease is characterized by comprising the following components in parts by weight:
100 parts of synthetic urea-based grease: the adhesive comprises 74-85 parts of trimellitate, 10-15 parts of polyisobutylene and 5-11 parts of polyurea;
12.9-38.9 parts of functional additive: 0.5-3 parts of high-temperature antioxidant, 0.1-0.3 part of copper corrosion resistant additive, 0.1-0.8 part of ferrous metal antirust preservative, 2-8 parts of flame-retardant lubricant, 5-12 parts of flame-retardant smoke suppressor and 5-15 parts of ultrahigh-temperature solid lubricant;
in the polyurea, 2-4.4 parts of MDI, 2-4.4 parts of tallow amine and 1-2.2 parts of cyclohexylamine are added;
the high-temperature antioxidant is diisooctyl diphenylamine T516Z; the copper corrosion resistant additive is T706; the ferrous metal antirust preservative is alkenyl succinic acid T746; the flame retardant lubricant is MCA; the flame-retardant smoke suppressor is nano-scale magnesium hydroxide; the ultrahigh-temperature solid lubricant is nano-grade zirconia.
2. The synthetic low-carbon ultrahigh-temperature grease as claimed in claim 1, wherein the trimellitate is SDPZ-2 and/or SDPZ-3; the polyisobutylene is PIB 2400; the MDI is WANNATE MDI-100; the tallow amine is straight-run non-hydrogenated tallow amine.
3. The preparation method of the synthetic low-carbon type ultrahigh-temperature lubricating grease is characterized by comprising the following steps of:
1) according to the production capacity, accurately metering 60-90% of trimellitate and all polyisobutylene in a fat-making kettle, stirring and heating to 70-75 ℃;
2) adding tallow amine and cyclohexylamine into a grease making kettle in a metering manner, and stirring until the tallow amine is completely dissolved;
3) adding the residual trimellitate into an MDI (diphenyl-methane-diisocyanate) melting kettle in a metering manner, and stirring and heating to 70-75 ℃; metering MDI, and stirring until the MDI is completely melted and transparent;
4) under the condition of stirring of the grease making kettle, slowly pumping the MDI solution into the grease making kettle, and heating the MDI solution under stirring to enable the materials in the grease making kettle to react for 30 +/-2 minutes at a constant temperature of 85-95 ℃;
5) adding weighed purified water into a fat preparation kettle, and continuously stirring at constant temperature for reaction for 15 +/-1 minutes;
6) heating the materials in the fat making kettle to 120-130 ℃ under stirring, and keeping the temperature for 10-30 minutes;
7) heating the materials in the fat making kettle to 170 +/-3 ℃, stopping heating, and starting a cooling cycle;
8) when the temperature in the fat making kettle is reduced to 150 ℃, stopping stirring and stopping cooling circulation; adding all the functional additives in sequence at one time; stirring is continued for 20 minutes to obtain the synthetic low-carbon type ultrahigh-temperature lubricating grease.
4. The method for preparing the synthetic low-carbon ultrahigh-temperature lubricating grease as claimed in claim 3, wherein the trimellitate accounts for 74-85 parts, and the polyisobutylene accounts for 10-15 parts.
5. The method for preparing the synthetic low-carbon ultrahigh-temperature grease of claim 4, wherein the trimellitate is SDPZ-2 and/or SDPZ-3; the polyisobutylene is PIB 2400.
6. The method for preparing the synthetic low-carbon ultrahigh-temperature lubricating grease according to claim 3, wherein 2-4.4 parts of MDI, 2-4.4 parts of tallow amine and 1-2.2 parts of cyclohexylamine are used.
7. The method for preparing the synthetic low-carbon ultrahigh-temperature lubricating grease according to claim 6, wherein the MDI is WANNATE MDI-100; the tallow amine is straight-run non-hydrogenated tallow amine.
8. The preparation method of the synthetic low-carbon ultrahigh-temperature lubricating grease as claimed in claim 3, characterized in that the functional additive is 12.9-38.9 parts: 0.5-3 parts of high-temperature antioxidant, 0.1-0.3 part of copper corrosion resistant additive, 0.1-0.8 part of ferrous metal antirust preservative, 2-8 parts of flame-retardant lubricant, 5-12 parts of flame-retardant smoke suppressor and 5-15 parts of ultrahigh-temperature solid lubricant.
9. The method for preparing the synthetic low-carbon type ultrahigh-temperature lubricating grease according to claim 8, wherein the high-temperature antioxidant is diisooctyldiphenylamine T516Z; the copper corrosion resistant additive is T706; the ferrous metal antirust preservative is alkenyl succinic acid T746; the flame retardant lubricant is MCA; the flame-retardant smoke suppressor is nano-scale magnesium hydroxide; the ultrahigh-temperature solid lubricant is nano-grade zirconia.
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| CN111073731A (en) * | 2019-11-07 | 2020-04-28 | 江苏澳润新材料有限公司 | Flame-retardant composite calcium sulfonate-based lubricating grease and preparation method thereof |
| CN110951521A (en) * | 2019-11-14 | 2020-04-03 | 北京市军鹰星润滑油加工厂 | Lubricating grease special for corrugating machine bearing and preparation method thereof |
| CN111205911B (en) * | 2020-01-15 | 2021-04-09 | 山东奇士登润滑科技有限公司 | Long-life synthetic high-temperature chain oil and preparation method thereof |
| CN111253997A (en) * | 2020-03-10 | 2020-06-09 | 广州联博科技发展有限公司 | Composite thickening type polyurea lubricating grease composition and preparation method thereof |
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