CN116855304A - Composite barium-based lubricating grease composition and preparation method and application thereof - Google Patents
Composite barium-based lubricating grease composition and preparation method and application thereof Download PDFInfo
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- CN116855304A CN116855304A CN202310719526.4A CN202310719526A CN116855304A CN 116855304 A CN116855304 A CN 116855304A CN 202310719526 A CN202310719526 A CN 202310719526A CN 116855304 A CN116855304 A CN 116855304A
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- barium
- grease composition
- temperature
- lubricating grease
- oil
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- 239000004519 grease Substances 0.000 title claims abstract description 46
- 239000000203 mixture Substances 0.000 title claims abstract description 37
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 29
- 229910052788 barium Inorganic materials 0.000 title claims abstract description 28
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 239000002131 composite material Substances 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000002199 base oil Substances 0.000 claims abstract description 26
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 19
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 16
- 239000002562 thickening agent Substances 0.000 claims abstract description 13
- 239000003921 oil Substances 0.000 claims abstract description 7
- 239000002253 acid Substances 0.000 claims description 29
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 claims description 20
- 229910001863 barium hydroxide Inorganic materials 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 239000003513 alkali Substances 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 8
- 239000002480 mineral oil Substances 0.000 claims description 8
- 235000010446 mineral oil Nutrition 0.000 claims description 8
- 238000007127 saponification reaction Methods 0.000 claims description 8
- 238000007872 degassing Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- ZQKXQUJXLSSJCH-UHFFFAOYSA-N melamine cyanurate Chemical group NC1=NC(N)=NC(N)=N1.O=C1NC(=O)NC(=O)N1 ZQKXQUJXLSSJCH-UHFFFAOYSA-N 0.000 claims description 5
- 229920002367 Polyisobutene Polymers 0.000 claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 4
- 229920013639 polyalphaolefin Polymers 0.000 claims description 4
- 150000004982 aromatic amines Chemical class 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000005461 lubrication Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 235000021355 Stearic acid Nutrition 0.000 description 6
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 6
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 6
- 239000008117 stearic acid Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000003541 multi-stage reaction Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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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
- C10M169/06—Mixtures of thickeners and additives
-
- 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
- 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
- C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
-
- 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
- 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
-
- 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
- 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
-
- 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
- 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
-
- 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
- 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
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
- C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
-
- 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
- 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
-
- 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
- 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
-
- 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
- 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
-
- 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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/22—Heterocyclic nitrogen compounds
- C10M2215/221—Six-membered rings containing nitrogen and carbon only
- C10M2215/222—Triazines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/02—Pour-point; Viscosity index
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/08—Resistance to extreme temperature
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/10—Semi-solids; greasy
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The invention belongs to the technical field of lubricating grease, and particularly relates to a composite barium-based lubricating grease composition, and a preparation method and application thereof. The barium-based lubricating grease composition comprises the following components in percentage by weight: (1) 30-40% of thickener; (2) 1.0-3.0% of antioxidant; (3) 13-15% of tackifier; (4) 0.5% -1.5% of antiwear agent; (5) the balance of base oil. The composite barium-based lubricating grease composition can effectively prevent gear abrasion and oil separation leakage during gear operation on the premise of ensuring the general performance, thereby better meeting the lubrication condition of a motor gear box, and the use temperature range of the lubricating grease is-20-150 ℃.
Description
Technical Field
The invention belongs to the technical field of lubricating grease, and particularly relates to a composite barium-based lubricating grease composition, and a preparation method and application thereof.
Background
The motor gear box is a gear reduction mechanism which meshes the power of a motor from a small gear with a small number of teeth on an input shaft to a large gear with a large number of teeth on an output shaft. During gear transmission, the meshed tooth surfaces have relative sliding, so friction and abrasion are required to occur, power consumption is increased, transmission efficiency is reduced, and lubrication of gears is needed to be considered particularly for high-speed transmission. The lubricant is filled between the gear tooth meshing surfaces, so that the direct contact of metals can be avoided, friction loss is reduced, and heat dissipation and rust resistance can be realized. Therefore, the gear transmission is properly lubricated, the working condition of the gear can be greatly improved, and the normal running and the expected service life of the gear can be maintained.
Gear transmission is continuously developed in the directions of high speed, heavy load, high temperature and microminiaturization, and gear failure caused by improper lubrication occurs, so that under new environmental conditions, development of high-performance, universal and long-service-life gear grease is increasingly important.
Disclosure of Invention
The invention aims at providing a composite barium-based lubricating grease composition and a preparation method and application thereof aiming at the working condition characteristics of wear resistance, leakage resistance and long service life of a motor gear box during operation, and the lubricating grease has excellent adhesion, leakage resistance and extreme pressure wear resistance and is particularly suitable for the motor gear box.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a composite barium-based lubricating grease composition comprises the following components in percentage by weight:
(1) 30-40% of a thickening agent;
(2) 1.0 to 3.0 percent of antioxidant;
(3) 13-15% of tackifier;
(4) 0.5% -1.5% of antiwear agent;
(5) And the balance of base oil.
Preferably, the thickening agent is prepared by reacting dodecadiacid, dodecahydroxystearic acid and barium hydroxide; further preferably, the molar ratio of the dodecadiacid to the dodecahydroxystearic acid is 2:2.5-3.5.
In a preferred embodiment, the molar ratio of the sum of the dodecadibasic acid and the dodecahydroxystearic acid to the barium hydroxide is stoichiometric, i.e., neither acid nor base is excessive. It should be understood by those skilled in the art that the amounts of the dodecadiacid, the dodecahydroxystearic acid and the barium hydroxide can be reversely deduced according to the amounts of the thickener prepared from the dodecadiacid, the dodecahydroxystearic acid and the barium hydroxide, which are well known to those skilled in the art and are not described herein.
Preferably, the antioxidant is an oil-soluble aromatic amine antioxidant. In a preferred embodiment, the antioxidant is GA-034 manufactured by Tianjin An Long New Material Co., ltd.
Preferably, the tackifier is a composition of ethylene-propylene copolymer and polyisobutylene in a mass ratio of 1:4-14; in a preferred embodiment, the ethylene-propylene copolymer is OCP-A manufactured by Henry, inc., and the polyisobutylene is JINEX 6240 manufactured by Jinlian lubricating oil additives, inc.
Preferably, the antiwear agent is melamine cyanurate.
Preferably, the base oil has a kinematic viscosity at 40 ℃ in the range of 160-260mm 2 S; further preferred, the base oil is a mixture of mineral oil A, mineral oil B and poly alpha olefin synthetic oil in a weight ratio of 3-5:4-6:1, wherein the mineral oil A is 500SN, the mineral oil B is 150BS, and the poly alpha olefin synthetic oil is PAO40.
The invention also provides a preparation method of the composite barium-based lubricating grease composition, which comprises the following steps:
(1) Mixing 60-75% of all base oil, dodecandioic acid and dodecahydroxystearic acid in a reaction kettle, heating to 85-90 ℃, adding 60-70% of all barium hydroxide alkali solution dissolved in water, and carrying out saponification reaction for 80-90min at 95-100 ℃;
(2) After the saponification reaction in the step (1) is completed, dropwise adding the residual alkali liquor of barium hydroxide dissolved in water into a reaction kettle, wherein the alkali dropwise time is 90-100min;
(3) After the alkali dripping in the step (2) is completed, heating to 130-140 ℃, and keeping the temperature for 30-40min;
(4) After the constant temperature in the step (3) is finished, heating to 158-163 ℃ and keeping the temperature for 5-10min;
(5) After the constant temperature of the step (4) is finished, pouring the mixture into a kettle for cooling, adding an antioxidant when the temperature is reduced to 140-150 ℃, and keeping the temperature for 30-40 minutes;
(6) After finishing the constant temperature in the step (5), continuing to cool, and adding the rest base oil and tackifier when the temperature is lowered to below 100 ℃;
(7) And adding an antiwear agent when the temperature is reduced to below 60 ℃, homogenizing, filtering and degassing to obtain the finished grease.
The invention also provides an application of the composite barium-based lubricating grease composition or the composite barium-based lubricating grease composition prepared by the preparation method in a motor gear box.
The invention has the advantages that:
1) The composite barium-based lubricating grease composition provided by the invention has the unique composite metal soap-based high-temperature thickener type, so that the lubricating grease has outstanding high-temperature resistance, extreme pressure resistance and wear resistance, and can well meet the high-temperature and extreme pressure performance requirements of a gear box;
2) The composite barium-based lubricating grease composition provided by the invention has the advantages that a uniform soap fiber structure is obtained by a reasonable formula and proper process conditions, the oil separation of lubricating grease is effectively reduced, and the leakage resistance is excellent;
3) The composite barium-based lubricating grease composition provided by the invention has the advantages that the balanced additive system ensures that the prepared lubricating grease has excellent oxidation resistance and adhesiveness;
in conclusion, the composite barium-based lubricating grease composition provided by the invention can effectively prevent gear abrasion and oil separation leakage during gear operation on the premise of ensuring the general performance, so that the lubricating condition of a motor gear box is better met, and the use temperature range of the lubricating grease is-20-150 ℃.
Detailed Description
The present invention is described in further detail below with reference to specific examples, but is not intended to limit the scope of the present invention.
The experimental methods used in the following examples are conventional methods unless otherwise specified. The experimental materials and related equipment used in the examples below, unless otherwise specified, are all commercially available.
Example 1
The present example provides a barium-based grease composition comprising: (1) a thickener 35%; (2) antioxidant 2.0%; (3) a tackifier 14%; (4) 1.0% of antiwear agent; (5) the balance of base oil.
The thickener is prepared from barium hydroxide, dodecandioic acid and dodecahydroxy stearic acid according to a stoichiometric ratio, wherein the molar ratio of the dodecandioic acid to the dodecahydroxy stearic acid is 2:3, a step of;
the antioxidant is GA-034;
the tackifier is OCP-A (1%), JINEX 6240 (13%);
the antiwear agent is melamine cyanurate;
the base oil is 500SN (Mobil), 150BS and PAO40 (Mobil) in a weight ratio of 4:5:1.
The preparation method comprises the following steps: adding 70% of the total amount of the base oil into a reaction kettle, adding the dodecahydroxystearic acid and the dodecandioic acid, and heating to 88 ℃ to enable the monobasic acid to be completely dissolved in the base oil; then, dissolving two-thirds of barium hydroxide with water, adding the dissolved alkali liquor into a reaction kettle, starting saponification reaction for 85 minutes at a reaction temperature of 98 ℃; continuously dissolving the rest one third of barium hydroxide with water, and beginning to drip alkali into the reaction kettle for 95 minutes; finishing alkali dripping, heating to 135 ℃, and carrying out constant-temperature composite reaction for 35 minutes; after the constant temperature is finished, the reaction kettle is heated to 160 ℃ and kept at the constant temperature for 8 minutes; then pouring the mixture into a kettle, cooling to 145 ℃, adding an antioxidant, and keeping the temperature for 35 minutes. Continuously cooling to below 100 ℃, regulating the consistency of the lubricating grease by using the residual base oil, and adding a tackifier; and adding an antiwear agent when the temperature is reduced to below 60 ℃, homogenizing, filtering and degassing to obtain the finished grease.
Example 2
The present example provides a barium-based grease composition comprising: (1) a thickener 30%; (2) 1.0% of an antioxidant; (3) a tackifier 13%; (4) 0.5% of antiwear agent; (5) the balance of base oil.
The thickener is prepared from barium hydroxide, dodecandioic acid and dodecahydroxy stearic acid according to a stoichiometric ratio, wherein the molar ratio of the dodecandioic acid to the dodecahydroxy stearic acid is 2:3, a step of;
the antioxidant is GA-034;
the tackifier is OCP-A (1%), JINEX 6240 (12%);
the antiwear agent is melamine cyanurate;
the base oil is 500SN (Mobil), 150BS and PAO40 (Mobil) in a weight ratio of 4:5:1.
The preparation method comprises the following steps: adding 60% of the total amount of the base oil into a reaction kettle, adding the dodecahydroxystearic acid and the dodecandioic acid, and heating to 85 ℃ to enable the monobasic acid to be completely dissolved in the base oil; then, dissolving two-thirds of barium hydroxide with water, adding the dissolved alkali liquor into a reaction kettle, starting saponification reaction for 80 minutes at a reaction temperature of 95 ℃; continuously dissolving the rest one third of barium hydroxide with water, and beginning to drip alkali into the reaction kettle for 90 minutes; finishing alkali dripping, heating to 130 ℃, and carrying out constant-temperature composite reaction for 30 minutes; after the constant temperature is finished, the reaction kettle is heated to 158 ℃ and kept at the constant temperature for 5 minutes; then pouring the mixture into a kettle, cooling to 140 ℃, adding an antioxidant, and keeping the temperature for 30 minutes. Continuously cooling to below 100 ℃, regulating the consistency of the lubricating grease by using the residual base oil, and adding a tackifier; and adding an antiwear agent when the temperature is reduced to below 60 ℃, homogenizing, filtering and degassing to obtain the finished grease.
Example 3
The present example provides a barium-based grease composition comprising: (1) a thickener 40%; (2) 3.0% of an antioxidant; (3) a tackifier 15%; (4) 1.5% of antiwear agent; (5) the balance of base oil.
The thickener is prepared from barium hydroxide, dodecandioic acid and dodecahydroxy stearic acid according to a stoichiometric ratio, wherein the molar ratio of the dodecandioic acid to the dodecahydroxy stearic acid is 2:3, a step of;
the antioxidant is GA-034;
the tackifier is OCP-A (2%), JINEX 6240 (13%);
the antiwear agent is melamine cyanurate;
the base oil is 500SN (Mobil), 150BS and PAO40 (Mobil) in a weight ratio of 4:5:1.
The preparation method comprises the following steps: adding 75% of the total amount of the base oil into a reaction kettle, adding the dodecahydroxystearic acid and the dodecandioic acid, and heating to 90 ℃ to enable the monobasic acid to be completely dissolved in the base oil; then, dissolving two-thirds of barium hydroxide with water, adding the dissolved alkali liquor into a reaction kettle, starting saponification reaction for 90 minutes at a reaction temperature of 100 ℃; continuously dissolving the rest one third of barium hydroxide with water, and beginning to drip alkali into the reaction kettle for 100 minutes; finishing alkali dripping, heating to 140 ℃, and carrying out constant-temperature composite reaction for 40 minutes; after the constant temperature is finished, the reaction kettle is heated to 163 ℃ and kept at the constant temperature for 10 minutes; then pouring the mixture into a kettle, cooling to 150 ℃, adding an antioxidant, and keeping the temperature for 40 minutes. Continuously cooling to below 100 ℃, regulating the consistency of the lubricating grease by using the residual base oil, and adding a tackifier; and adding an antiwear agent when the temperature is reduced to below 60 ℃, homogenizing, filtering and degassing to obtain the finished grease.
Comparative example 1
The only difference compared to example 1 is that the barium hydroxide added in the one-step saponification is one half of the total amount of barium hydroxide.
Comparative example 2
The only difference compared to example 1 is that the tackifier added was only ethylene-propylene copolymer OCP-A (14%).
Comparative example 3
The only difference compared to example 1 is that the tackifier added is only polyisobutene JINEX 6240 (14%).
Test examples
The greases obtained in the examples and comparative examples were subjected to performance tests (the test results are shown in table 1).
Table 1 results of grease performance tests
While the invention has been described in detail in the foregoing general description, embodiments and experiments, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (9)
1. The composite barium-based lubricating grease composition is characterized by comprising the following components in percentage by weight:
(1) 30-40% of a thickening agent;
(2) 1.0 to 3.0 percent of antioxidant;
(3) 13-15% of tackifier;
(4) 0.5% -1.5% of antiwear agent;
(5) And the balance of base oil.
2. The composite barium-based lubricating grease composition according to claim 1, wherein the thickener is prepared by reacting a dodecandioic acid, a dodecahydroxystearic acid and barium hydroxide; preferably, the molar ratio of the dodecadiacid to the dodecahydroxystearic acid is 2:2.5-3.5.
3. The complex barium-based grease composition according to claim 1 or 2, wherein the antioxidant is an oil-soluble aromatic amine antioxidant.
4. A complex barium-based grease composition according to any one of claims 1-3, wherein the tackifier is a composition of ethylene-propylene copolymer and polyisobutylene in a mass ratio of 1:4-14.
5. The complex barium-based grease composition of any one of claims 1-4, wherein the antiwear agent is melamine cyanurate.
6. A complex barium-based grease composition according to any one of claims 1-5, wherein the base oil has a kinematic viscosity at 40 ℃ in the range of 160-260mm 2 /s。
7. The complex barium-based grease composition of claim 6, wherein the base oil is a mixture of mineral oil a, mineral oil B, and poly-alpha-olefin synthetic oil in a weight ratio of 3-5:4-6:1, wherein mineral oil a is 500SN, mineral oil B is 150BS, and poly-alpha-olefin synthetic oil is PAO40.
8. A method for preparing a complex barium-based grease composition according to any one of claims 1 to 7, comprising the steps of:
(1) Mixing 60-75% of all base oil, dodecandioic acid and dodecahydroxystearic acid in a reaction kettle, heating to 85-90 ℃, adding 60-70% of all barium hydroxide alkali solution dissolved in water, and carrying out saponification reaction for 80-90min at 95-100 ℃;
(2) After the saponification reaction in the step (1) is completed, dropwise adding the residual alkali liquor of barium hydroxide dissolved in water into a reaction kettle, wherein the alkali dropwise time is 90-100min;
(3) After the alkali dripping in the step (2) is completed, heating to 130-140 ℃, and keeping the temperature for 30-40min;
(4) After the constant temperature in the step (3) is finished, heating to 158-163 ℃ and keeping the temperature for 5-10min;
(5) After the constant temperature of the step (4) is finished, pouring the mixture into a kettle for cooling, adding an antioxidant when the temperature is reduced to 140-150 ℃, and keeping the temperature for 30-40 minutes;
(6) After finishing the constant temperature in the step (5), continuing to cool, and adding the rest base oil and tackifier when the temperature is lowered to below 100 ℃;
(7) And adding an antiwear agent when the temperature is reduced to below 60 ℃, homogenizing, filtering and degassing to obtain the finished grease.
9. Use of the complex barium-based grease composition according to any one of claims 1 to 7 or the complex barium-based grease composition prepared by the preparation method according to claim 8 in motor gearboxes.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111718778A (en) * | 2020-06-23 | 2020-09-29 | 长沙众城石油化工有限责任公司 | Composite calcium-based lubricating grease and preparation method thereof |
| CN113604266A (en) * | 2021-07-26 | 2021-11-05 | 新协同（宁波）油脂有限公司 | Special lubricating grease for speed reducer and preparation method thereof |
| CN115305129A (en) * | 2022-08-12 | 2022-11-08 | 中国石油化工股份有限公司 | Barium-based lubricating grease composition and preparation method and application thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111718778A (en) * | 2020-06-23 | 2020-09-29 | 长沙众城石油化工有限责任公司 | Composite calcium-based lubricating grease and preparation method thereof |
| CN113604266A (en) * | 2021-07-26 | 2021-11-05 | 新协同（宁波）油脂有限公司 | Special lubricating grease for speed reducer and preparation method thereof |
| CN115305129A (en) * | 2022-08-12 | 2022-11-08 | 中国石油化工股份有限公司 | Barium-based lubricating grease composition and preparation method and application thereof |
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