CN115651734A - Wear-resistant silicon oil composite lithium-based lubricating grease and preparation process thereof - Google Patents
Wear-resistant silicon oil composite lithium-based lubricating grease and preparation process thereof Download PDFInfo
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- 239000004519 grease Substances 0.000 title claims abstract description 73
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 60
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 32
- 239000002131 composite material Substances 0.000 title claims abstract description 28
- 239000003921 oil Substances 0.000 title claims abstract description 27
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title abstract description 17
- 229910052710 silicon Inorganic materials 0.000 title abstract description 17
- 239000010703 silicon Substances 0.000 title abstract description 17
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 229920002545 silicone oil Polymers 0.000 claims abstract description 52
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 48
- 239000000194 fatty acid Substances 0.000 claims abstract description 48
- 229930195729 fatty acid Natural products 0.000 claims abstract description 48
- 239000010696 ester oil Substances 0.000 claims abstract description 47
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 45
- 239000002253 acid Substances 0.000 claims abstract description 41
- 239000002199 base oil Substances 0.000 claims abstract description 41
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims abstract description 34
- PQVSTLUFSYVLTO-UHFFFAOYSA-N ethyl n-ethoxycarbonylcarbamate Chemical compound CCOC(=O)NC(=O)OCC PQVSTLUFSYVLTO-UHFFFAOYSA-N 0.000 claims abstract description 31
- GLXDVVHUTZTUQK-UHFFFAOYSA-M lithium hydroxide monohydrate Substances [Li+].O.[OH-] GLXDVVHUTZTUQK-UHFFFAOYSA-M 0.000 claims abstract description 31
- 229940040692 lithium hydroxide monohydrate Drugs 0.000 claims abstract description 31
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 21
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 21
- 239000013556 antirust agent Substances 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 16
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 78
- 238000006243 chemical reaction Methods 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 23
- 238000002156 mixing Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 16
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000000227 grinding Methods 0.000 claims description 13
- JNXDCMUUZNIWPQ-UHFFFAOYSA-N trioctyl benzene-1,2,4-tricarboxylate Chemical compound CCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCC)C(C(=O)OCCCCCCCC)=C1 JNXDCMUUZNIWPQ-UHFFFAOYSA-N 0.000 claims description 10
- 230000018044 dehydration Effects 0.000 claims description 9
- 238000006297 dehydration reaction Methods 0.000 claims description 9
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 claims description 8
- -1 dipentaerythritol ester Chemical class 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 235000021355 Stearic acid Nutrition 0.000 claims description 4
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 4
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 4
- 239000008117 stearic acid Substances 0.000 claims description 4
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
- 229940008099 dimethicone Drugs 0.000 claims 1
- 239000004205 dimethyl polysiloxane Substances 0.000 claims 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 4
- 230000008719 thickening Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 239000004014 plasticizer Substances 0.000 description 5
- 239000000344 soap Substances 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 239000005060 rubber Substances 0.000 description 4
- HVCOBJNICQPDBP-UHFFFAOYSA-N 3-[3-[3,5-dihydroxy-6-methyl-4-(3,4,5-trihydroxy-6-methyloxan-2-yl)oxyoxan-2-yl]oxydecanoyloxy]decanoic acid;hydrate Chemical compound O.OC1C(OC(CC(=O)OC(CCCCCCC)CC(O)=O)CCCCCCC)OC(C)C(O)C1OC1C(O)C(O)C(O)C(C)O1 HVCOBJNICQPDBP-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229930186217 Glycolipid Natural products 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000002537 cosmetic Substances 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000003599 detergent Substances 0.000 description 3
- AMTWCFIAVKBGOD-UHFFFAOYSA-N dioxosilane;methoxy-dimethyl-trimethylsilyloxysilane Chemical compound O=[Si]=O.CO[Si](C)(C)O[Si](C)(C)C AMTWCFIAVKBGOD-UHFFFAOYSA-N 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 125000004185 ester group Chemical group 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000005445 natural material Substances 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 150000003904 phospholipids Chemical class 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 229940083037 simethicone Drugs 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- ZVLDJSZFKQJMKD-UHFFFAOYSA-N [Li].[Si] Chemical compound [Li].[Si] ZVLDJSZFKQJMKD-UHFFFAOYSA-N 0.000 description 2
- JZZIHCLFHIXETF-UHFFFAOYSA-N dimethylsilicon Chemical compound C[Si]C JZZIHCLFHIXETF-UHFFFAOYSA-N 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- TXBCBTDQIULDIA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol Chemical compound OCC(CO)(CO)COCC(CO)(CO)CO TXBCBTDQIULDIA-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000000845 anti-microbial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
Abstract
The application provides an abrasion-resistant silicon oil composite lithium-based lubricating grease and a preparation process thereof, and relates to the technical field of lubricating grease. The anti-wear silicon oil composite lithium-based lubricating grease comprises the following raw materials in percentage by weight: 60-75% of dimethyl silicone oil, 10-14% of fatty acid, 3-5% of dibasic acid, 3-5% of lithium hydroxide monohydrate, 8-20% of ester oil, 0.5-1% of antioxidant and 0.5-1% of antirust agent; the fatty acid, the dibasic acid and the lithium hydroxide monohydrate can react to generate the composite lithium-based lubricating grease which has excellent thickening capacity; the base oil is compounded by the dimethyl silicone oil and the ester oil, so that the extreme pressure wear resistance can be effectively improved. The combination of the two has the capability of resisting abrasion for a long time, so that the abrasion of the part can be effectively reduced, and the service life of the part is prolonged. The preparation process of the wear-resistant silicon oil composite lithium-based lubricating grease is simple in process flow, and the prepared lubricating grease is high in service performance and good in quality.
Description
Technical Field
The application relates to the technical field of lubricating grease, in particular to wear-resistant silicon oil composite lithium-based lubricating grease and a preparation process thereof.
Background
The lubricating grease is mainly used for a friction part of a machine and plays a role in lubrication and sealing. Also used on metal surface to fill gap and prevent rust. The lubricating grease is divided into soap base and non-soap base according to different thickeners, so that the lubricating grease can be applied to different working conditions according to different structural characteristics, and the lubricating grease with different structures has different performance attributes. Compared with mineral oil and synthetic oil, the silicone oil has more excellent performance in low temperature, has lower volatilization amount under high temperature condition, has higher high temperature volatilization resistance, is more excellent in high temperature oil separation, and is superior to the mineral oil and the synthetic oil in rubber compatibility, but although the silicone oil has certain sealing and protecting performance, the lubricating performance of the silicone oil is relatively poor, so that certain lubricating and wear-resisting requirements are difficult to meet, and the application range is limited.
Disclosure of Invention
The application aims to provide the wear-resistant silicon oil composite lithium-based lubricating grease which is good in lubricating performance and high in wear resistance, and can effectively reduce the wear of parts and prolong the service life of the parts.
The application also aims to provide a preparation process of the anti-wear silicone oil composite lithium-based lubricating grease, the process flow is simple, and the prepared lubricating grease is high in service performance and good in quality.
The technical problem to be solved by the application is solved by adopting the following technical scheme.
On one hand, the embodiment of the application provides an antiwear lithium-silicone oil complex grease which comprises the following raw materials in percentage by weight: 60-75% of dimethyl silicone oil, 10-14% of fatty acid, 3-5% of dibasic acid, 3-5% of lithium hydroxide monohydrate, 8-20% of ester oil, 0.5-1% of antioxidant and 0.5-1% of antirust agent.
On the other hand, the embodiment of the application provides a preparation process of an anti-wear lithium-silicon-oil complex grease, which comprises the following steps:
taking dimethyl silicone oil and ester oil, stirring and mixing to obtain base oil for later use; adding water into lithium hydroxide monohydrate to prepare a lithium hydroxide solution for later use;
adding 50% of base oil into fatty acid, heating to 83-88 ℃ to melt the fatty acid, adding 50% of lithium hydroxide solution, and reacting and dehydrating at 98-103 ℃; heating to 125-135 ℃ after the reaction is finished, adding dibasic acid, stirring to dissolve, adding the rest 50% of lithium hydroxide solution, reacting and dehydrating, keeping the temperature at 130-145 ℃ for 2-3h after the reaction is finished, adding 30% of base oil, heating to 205-210 ℃, adding the rest 20% of base oil, cooling to 130-145 ℃, adding an antioxidant and an antirust agent, stirring, mixing, cooling to room temperature, and grinding to obtain the finished product.
Compared with the prior art, the embodiment of the application has at least the following advantages or beneficial effects:
aiming at the first aspect, the embodiment of the present application provides an antiwear lithium-silicone-oil complex grease, which comprises the following raw materials, by weight: 60-75% of dimethyl silicone oil, 10-14% of fatty acid, 3-5% of dibasic acid, 3-5% of lithium hydroxide monohydrate, 8-20% of ester oil, 0.5-1% of antioxidant and 0.5-1% of antirust agent.
In the raw material components of the wear-resistant silicon oil composite lithium-based lubricating grease, the dimethyl silicon oil is a hydrophobic organic silicon material, is applied to various fields of medicines, daily chemical products, foods, buildings and the like, is tasteless, has high transparency, has heat resistance and cold resistance, has excellent physical properties, and can be applied to the aspects of moisture-proof insulation, damping, shock absorption, defoaming and the like. Fatty acid is a kind of compound composed of three elements of carbon, hydrogen and oxygen, is the main component of neutral fat, phospholipid and glycolipid, and is mainly used for manufacturing daily cosmetics, detergents, industrial fatty acid salts, coatings, paints, rubbers, soaps and the like. The ester oil is a natural substance containing ester groups in a molecular structure, has high viscosity index, good low-temperature performance, excellent lubricating performance and load bearing capacity, and can be used in a wide temperature range.
Wherein, the fatty acid, the dibasic acid and the lithium hydroxide monohydrate can react to generate the composite lithium-based lubricating grease which has excellent thickening capability on various types of base oil and good sensitivity on other additives and can form a more stable and high-quality lubricating grease structure; the base oil is compounded by the dimethyl silicone oil and the ester oil, so that the extreme pressure wear resistance can be effectively improved. The silicon oil composite lithium-based lubricating grease obtained by combining the silicon oil composite lithium-based lubricating grease and the lithium-based lubricating grease can comprehensively improve the lubricating performance of the product lubricating grease, has long-time wear resistance, can effectively reduce the wear of parts, and prolongs the service life of the parts.
Aiming at the second aspect, the embodiment of the application provides a preparation process of the anti-wear silicon oil composite lithium-based lubricating grease, which comprises the steps of taking dimethyl silicon oil and ester oil, stirring and mixing to obtain base oil for later use; adding water into lithium hydroxide monohydrate to prepare a lithium hydroxide solution for later use; adding 50% of base oil into fatty acid, heating to 83-88 ℃ to melt the fatty acid, adding 50% of lithium hydroxide solution, and reacting and dehydrating at 98-103 ℃; heating to 125-135 ℃ after the reaction is finished, adding dibasic acid, stirring to dissolve, adding the rest 50% of lithium hydroxide solution, performing reaction dehydration, keeping the temperature at 130-145 ℃ for 2-3h after the reaction is finished, adding 30% of base oil, heating to 205-210 ℃, adding the rest 20% of base oil, cooling to 130-145 ℃, adding an antioxidant and an antirust agent, stirring, mixing, cooling to room temperature, and grinding to obtain the finished product. The process is simple, and the prepared finished lubricating grease has good wear resistance and excellent quality.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to specific examples.
The embodiment of the application provides an abrasion-resistant silicon oil composite lithium-based lubricating grease which comprises the following raw materials in percentage by weight: 60-75% of dimethyl silicone oil, 10-14% of fatty acid, 3-5% of dibasic acid, 3-5% of lithium hydroxide monohydrate, 8-20% of ester oil, 0.5-1% of antioxidant and 0.5-1% of antirust agent.
In the present embodiment, the simethicone is a hydrophobic silicone material, and is applicable to various fields such as medicines, daily chemical products, foods, and buildings, and has the advantages of no smell, high transparency, heat resistance, cold resistance, and excellent physical properties, and can be applied to moisture-proof insulation, damping, shock absorption, defoaming, etc. Fatty acid is a kind of compound composed of three elements of carbon, hydrogen and oxygen, is the main component of neutral fat, phospholipid and glycolipid, and is mainly used for manufacturing daily cosmetics, detergents, industrial fatty acid salts, coatings, paints, rubbers, soaps and the like. The ester oil is a natural substance containing ester groups in a molecular structure, has high viscosity index, good low-temperature performance, excellent lubricating performance and load bearing capacity, and can be used in a wide temperature range.
Wherein, the fatty acid, the dibasic acid and the lithium hydroxide monohydrate can react to generate the composite lithium-based lubricating grease which has excellent thickening capability on various types of base oil and good sensitivity on other additives and can form a more stable and high-quality lubricating grease structure; the base oil is compounded by the dimethyl silicone oil and the ester oil, so that the extreme pressure wear resistance can be effectively improved. The silicon oil composite lithium-based lubricating grease obtained by combining the silicon oil composite lithium-based lubricating grease and the lithium-based lubricating grease can comprehensively improve the lubricating performance of the product lubricating grease, has long-time wear resistance, can effectively reduce the wear of parts, and prolongs the service life of the parts.
Further, in some embodiments of the present application, the composition comprises the following raw materials by weight percent: 68% of dimethyl silicone oil, 10% of fatty acid, 3% of dibasic acid, 3% of lithium hydroxide monohydrate, 15% of ester oil, 0.5% of antioxidant and 0.5% of antirust agent.
In this embodiment, through further restriction to each raw materials quantity ratio, make the prescription more reasonable, reaction cooperation that can be better between the raw materials can promote the lubricated wear resistance of product lubricating grease comprehensively, promote the product quality.
Further, in some embodiments of the present application, the ester oil is any one of trioctyl trimellitate, dipentaerythritol ester, and trimethylolpropane complex ester.
In this embodiment, trioctyl trimellitate is often used as a plasticizer, has heat resistance and durability, combines the advantages of polyester plasticizers and monomer plasticizers, and has better compatibility, processability, and low temperature performance than polyester plasticizers, and excellent electrical properties. The dipentaerythritol ester is an important fine chemical intermediate, is mainly used in high-grade paint industry, and the dipentaerythritol higher fat is used in high-grade aviation lubricating oil, and has excellent performances of strong adhesion, friction resistance, aging resistance and the like. The trimethylolpropane composite ester has excellent thermal stability and oxidation stability, has the characteristics of high viscosity index, low pour point, easy intersolubility and the like, can keep strong fluidity at low temperature, and can play a role in lubrication and sealing in a high-temperature environment. The ester oil is selected to be matched with the dimethyl silicone oil to be used as the base oil, so that the service performance of the product lubricating grease can be effectively improved.
Further, in some embodiments of the present application, the fatty acid is any one of dodecahydroxystearic acid and stearic acid.
In this example, dodecahydroxystearic acid is a flaky or needle-shaped crystal, insoluble in water, and soluble in ethanol, ether and chloroform. Stearic acid is a fatty acid widely existing in nature, has wide application range and is used as a lubricant and a stabilizer in the plastic industry.
Further, in some embodiments of the present application, the dibasic acid is any one of sebacic acid and azelaic acid.
In this example, sebacic acid has low toxicity and high temperature resistance, is slightly soluble in water, is poorly soluble in benzene, petroleum ether, carbon tetrachloride, and is readily soluble in ethanol and diethyl ether. Azelaic acid is commonly used as a plasticizer while having antimicrobial properties.
Further, in some embodiments of the present application, the kinematic viscosity of the dimethyl silicone oil at 25 ℃ is 130 to 380mm 2 S; the kinematic viscosity of the ester oil at 40 ℃ is 80-250 mm 2 /s。
In this embodiment, by controlling the kinematic viscosity of the simethicone and the ester oil, it is ensured that the base oil obtained by compounding the simethicone and the ester oil can maintain a good kinematic viscosity performance, so as to ensure that the product grease has excellent mechanical stability and improve the product performance and quality.
Further, in some embodiments of the present application, by weightThe composite material comprises the following raw materials in percentage: 68% of dimethyl silicone oil, 10% of fatty acid, 3% of dibasic acid, 3% of lithium hydroxide monohydrate, 15% of ester oil, 0.5% of antioxidant and 0.5% of antirust agent; wherein the fatty acid is dodecahydroxystearic acid, the dibasic acid is sebacic acid, and the ester oil is trioctyl trimellitate; the trioctyl trimellitate has a kinematic viscosity at 40 ℃ of 88mm 2 The kinematic viscosity of the dimethyl silicone oil at 25 ℃ is 138mm 2 /s。
In the embodiment, the component is better in wear resistance, better in quality, excellent in mechanical stability, stable and easy to use than the obtained product lubricating grease.
The embodiment of the application also provides a preparation process of the anti-wear silicone oil composite lithium-based lubricating grease, which comprises the following steps:
taking dimethyl silicone oil and ester oil, stirring and mixing to obtain base oil for later use; adding water into lithium hydroxide monohydrate to prepare a lithium hydroxide solution for later use;
adding 50% of base oil into fatty acid, heating to 83-88 ℃ to melt the fatty acid, adding 50% of lithium hydroxide solution, and reacting and dehydrating at 98-103 ℃; heating to 125-135 ℃ after the reaction is finished, adding dibasic acid, stirring to dissolve, adding the rest 50% of lithium hydroxide solution, performing reaction dehydration, keeping the temperature at 130-145 ℃ for 2-3h after the reaction is finished, adding 30% of base oil, heating to 205-210 ℃, adding the rest 20% of base oil, cooling to 130-145 ℃, adding an antioxidant and an antirust agent, stirring, mixing, cooling to room temperature, and grinding to obtain the finished product. The process is simple, and the prepared finished lubricating grease has good wear resistance and excellent quality.
Further, in some embodiments of the present application, the weight ratio of lithium hydroxide monohydrate to water in the lithium hydroxide solution is 1: (5-6.5).
Further, in some embodiments of the present application, the grinding is performed in a three-roll mill with a grease discharge rate of 1.1-1.7kg/min.
The features and properties of the present application are described in further detail below with reference to examples.
Example 1
The embodiment provides an antiwear lithium-silicon oil complex grease, which comprises the following raw materials in percentage by weight: 68% of dimethyl silicone oil, 10% of fatty acid, 3% of dibasic acid, 3% of lithium hydroxide monohydrate, 15% of ester oil, 0.5% of antioxidant and 0.5% of antirust agent. Wherein the ester oil is trioctyl trimellitate; the fatty acid is dodecahydroxystearic acid; the dibasic acid is sebacic acid; the kinematic viscosity of the dimethyl silicone oil at 25 ℃ is 138mm 2 S; the kinematic viscosity of the ester oil at 40 ℃ is 88mm 2 /s；
The preparation process comprises the following steps:
taking dimethyl silicone oil and ester oil, stirring and mixing to obtain base oil for later use; adding water into lithium hydroxide monohydrate to prepare a lithium hydroxide solution (the weight ratio of the lithium hydroxide monohydrate to the water is 1:6) for later use;
taking 50% base oil, adding fatty acid, heating to 85 ℃ to melt the fatty acid, adding 50% lithium hydroxide solution, and carrying out reaction dehydration at 100 ℃; heating to 130 ℃ after the reaction is finished, adding dibasic acid, stirring to dissolve, adding the rest 50% of lithium hydroxide solution, performing reaction dehydration, keeping the temperature at 140 ℃ for 3 hours after the reaction is finished, adding 30% of base oil, heating to 210 ℃, adding the rest 20% of base oil, cooling to 130 ℃, adding an antioxidant and an antirust agent, stirring, mixing, cooling to room temperature, grinding in a three-roller machine, wherein the grease discharging speed of the three-roller machine is 1.5kg/min, and thus obtaining the finished product.
Example 2
The embodiment provides an antiwear lithium-silicone-oil composite lubricating grease which comprises the following raw materials in percentage by weight: 65% of dimethyl silicone oil, 12% of fatty acid, 3% of dibasic acid, 3% of lithium hydroxide monohydrate, 16% of ester oil, 0.5% of antioxidant and 0.5% of antirust agent. Wherein the ester oil is trioctyl trimellitate; the fatty acid is dodecahydroxystearic acid; the dibasic acid is sebacic acid; the kinematic viscosity of the dimethyl silicone oil at 25 ℃ is 138mm 2 S; the kinematic viscosity of the ester oil at 40 ℃ is 88mm 2 /s；
The preparation process comprises the following steps:
taking dimethyl silicone oil and ester oil, stirring and mixing to obtain base oil for later use; adding water into lithium hydroxide monohydrate to prepare a lithium hydroxide solution (the weight ratio of the lithium hydroxide monohydrate to the water is 1:5) for later use;
taking 50% base oil, adding fatty acid, heating to 85 ℃ to melt the fatty acid, adding 50% lithium hydroxide solution, and carrying out reaction dehydration at 100 ℃; heating to 125 ℃ after the reaction is finished, adding dibasic acid, stirring to dissolve, adding the rest 50% of lithium hydroxide solution, carrying out reaction dehydration, keeping the temperature at 140 ℃ for 2-3h after the reaction is finished, adding 30% of base oil, heating to 210 ℃, adding the rest 20% of base oil, cooling to 140 ℃, adding an antioxidant and an antirust agent, stirring, mixing, cooling to room temperature, grinding in a three-roller machine, and obtaining the finished product, wherein the grease discharging speed of the three-roller machine is 1.7kg/min.
Example 3
The embodiment provides an antiwear lithium-silicon oil complex grease, which comprises the following raw materials in percentage by weight: 60% of dimethyl silicone oil, 14% of fatty acid, 5% of dibasic acid, 3% of lithium hydroxide monohydrate, 16% of ester oil, 1% of antioxidant and 1% of antirust agent. Wherein the ester oil is dipentaerythritol ester; the fatty acid is stearic acid; the dibasic acid is azelaic acid; the kinematic viscosity of the dimethyl silicone oil at 25 ℃ is 138mm 2 S; the kinematic viscosity of the ester oil at 40 ℃ is 116mm 2 /s；
The preparation process comprises the following steps:
taking dimethyl silicone oil and ester oil, and stirring and mixing to obtain base oil for later use; adding water into lithium hydroxide monohydrate to prepare a lithium hydroxide solution (the weight ratio of the lithium hydroxide monohydrate to the water is 1:6) for later use;
adding 50% of base oil into fatty acid, heating to 83-88 ℃ to melt the fatty acid, adding 50% of lithium hydroxide solution, and reacting and dehydrating at 98-103 ℃; heating to 125-135 ℃ after the reaction is finished, adding dibasic acid, stirring for dissolving, adding the rest 50% of lithium hydroxide solution, performing reaction dehydration, keeping the temperature at 130-145 ℃ for 2-3h after the reaction is finished, adding 30% of base oil, heating to 205-210 ℃, adding the rest 20% of base oil, cooling to 130-145 ℃, adding an antioxidant and an antirust agent, stirring, mixing, cooling to room temperature, grinding in a three-roller machine, and obtaining the finished product, wherein the grease discharging speed of the three-roller machine is 1.1-1.7kg/min.
Comparative example
Compared with the example 1, the difference is that no ester oil is added, and part of the ester oil is supplemented by the dimethyl silicone oil, which is as follows:
the anti-wear silicon oil composite lithium-based lubricating grease comprises the following raw materials in percentage by weight: 83 percent of dimethyl silicone oil, 10 percent of fatty acid, 3 percent of dibasic acid, 3 percent of lithium hydroxide monohydrate, 0.5 percent of antioxidant and 0.5 percent of antirust agent. Wherein the ester oil is trioctyl trimellitate; the fatty acid is dodecahydroxystearic acid; the dibasic acid is sebacic acid; the kinematic viscosity of the dimethyl silicone oil at 25 ℃ is 138mm 2 S; the kinematic viscosity of the ester oil at 40 ℃ is 88mm 2 /s；
The preparation process comprises the following steps:
taking dimethyl silicone oil as base oil for later use; adding water into lithium hydroxide monohydrate to prepare a lithium hydroxide solution (the weight ratio of the lithium hydroxide monohydrate to the water is 1:6) for later use;
taking 50% base oil, adding fatty acid, heating to 85 ℃ to melt the fatty acid, adding 50% lithium hydroxide solution, and reacting and dehydrating at 100 ℃; heating to 130 ℃ after the reaction is finished, adding dibasic acid, stirring for dissolving, adding the rest 50% of lithium hydroxide solution, carrying out reaction dehydration, keeping the temperature at 140 ℃ for 3 hours after the reaction is finished, adding 30% of base oil, heating to 210 ℃, adding the rest 20% of base oil, cooling to 130 ℃, adding an antioxidant and an antirust agent, stirring, mixing, cooling to room temperature, grinding in a three-roller machine, and obtaining the finished product, wherein the grease discharging speed of the three-roller machine is 1.5 kg/min.
Test examples
The grease products provided in examples 1 to 3 and comparative examples of the present application were measured and evaluated for penetration, wide temperature and low point, steel mesh oil separation, evaporation capacity and long wear performance according to the corresponding test standards, and the test results are shown in table 1:
TABLE 1
Through detection, the product lubricating grease provided by the embodiments 1-3 and the comparative example has a large phase difference except for long-grinding test data, and other detection data are equivalent, and meanwhile, in the examples 1-3, ester oil is added for mixing in the early stage and reacts, and the long-grinding data is compared with the detection data obtained by mixing reaction without adding the ester oil in the comparative example, and the long-grinding data are superior to the comparative example.
In summary, in the embodiment of the present invention, the anti-wear silicone oil composite lithium-based lubricating grease and the preparation process thereof are provided, wherein the dimethyl silicone oil is a hydrophobic silicone material, and the lubricating grease is applied to various fields such as medicines, daily chemical products, foods, buildings, etc., and has the advantages of no smell, high transparency, heat resistance, cold resistance, excellent physical properties, and can be applied to moisture-proof insulation, damping, shock absorption, defoaming, etc. Fatty acid is a compound composed of three elements of carbon, hydrogen and oxygen, is the main component of neutral fat, phospholipid and glycolipid, and is mainly used for manufacturing daily cosmetics, detergents, industrial fatty acid salts, coatings, paints, rubber, soap and the like. The ester oil is a natural substance containing ester groups in a molecular structure, has high viscosity index, good low-temperature performance, excellent lubricating performance and load bearing capacity, and can be used in a wide temperature range. Wherein, the fatty acid, the dibasic acid and the lithium hydroxide monohydrate can react to generate the composite lithium-based lubricating grease which has excellent thickening capability on various types of base oil and good sensitivity on other additives and can form a more stable and high-quality lubricating grease structure; the base oil is compounded by the dimethyl silicone oil and the ester oil, so that the extreme pressure wear resistance can be effectively improved. The silicon oil composite lithium-based lubricating grease obtained by combining the silicon oil composite lithium-based lubricating grease and the lithium-based lubricating grease can comprehensively improve the lubricating performance of the product lubricating grease, has long-time wear resistance, can effectively reduce the wear of parts, and prolongs the service life of the parts. The preparation method is simple in process, and the prepared finished lubricating grease is good in wear resistance and excellent in quality.
The embodiments described above are some, but not all embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Claims (10)
1. The anti-wear lithium-silicon-oil composite lubricating grease is characterized by comprising the following raw materials in percentage by weight: 60-75% of dimethyl silicone oil, 10-14% of fatty acid, 3-5% of dibasic acid, 3-5% of lithium hydroxide monohydrate, 8-20% of ester oil, 0.5-1% of antioxidant and 0.5-1% of antirust agent.
2. The anti-galling lithium-silicone-oil complex grease of claim 1, which comprises the following raw materials in percentage by weight: 68% of dimethyl silicone oil, 10% of fatty acid, 3% of dibasic acid, 3% of lithium hydroxide monohydrate, 15% of ester oil, 0.5% of antioxidant and 0.5% of antirust agent.
3. The anti-galling lithium silicone oil complex grease as defined in claim 1, wherein said ester oil is any one of trioctyl trimellitate, dipentaerythritol ester, and trimethylolpropane complex ester.
4. The anti-galling lithium silicone oil complex grease according to claim 1, wherein the fatty acid is any one of dodecahydroxystearic acid and stearic acid.
5. The anti-galling lithium-silicone oil complex grease of claim 1, wherein the dibasic acid is any one of sebacic acid and azelaic acid.
6. The anti-galling lithium complex silicone oil grease of claim 1 wherein the dimethicone has a kinematic viscosity at 25 ℃ of 130 to 380mm 2 S; the kinematic viscosity of the ester oil at 40 ℃ is 80-250 mm 2 /s。
7. The anti-galling lithium-silicone-oil complex grease of claim 1, which comprises the following raw materials in percentage by weight: 68% of dimethyl silicone oil, 10% of fatty acid, 3% of dibasic acid, 3% of lithium hydroxide monohydrate, 15% of ester oil, 0.5% of antioxidant and 0.5% of antirust agent; wherein the fatty acid is dodecahydroxystearic acid, the dibasic acid is sebacic acid, and the ester oil is trioctyl trimellitate; the trioctyl trimellitate has a kinematic viscosity of 88mm at 40 DEG C 2 The kinematic viscosity of the dimethyl silicone oil at 25 ℃ is 138mm 2 /s。
8. A process for preparing the anti-galling lithium complex silicone oil grease according to any one of claims 1 to 7, comprising the steps of:
taking dimethyl silicone oil and ester oil, and stirring and mixing to obtain base oil for later use; adding water into lithium hydroxide monohydrate to prepare a lithium hydroxide solution for later use;
adding 50% of base oil into fatty acid, heating to 83-88 ℃ to melt the fatty acid, adding 50% of lithium hydroxide solution, and reacting and dehydrating at 98-103 ℃; heating to 125-135 ℃ after the reaction is finished, adding dibasic acid, stirring to dissolve, adding the rest 50% of lithium hydroxide solution, performing reaction dehydration, keeping the temperature at 130-145 ℃ for 2-3h after the reaction is finished, adding 30% of base oil, heating to 205-210 ℃, adding the rest 20% of base oil, cooling to 130-145 ℃, adding an antioxidant and an antirust agent, stirring, mixing, cooling to room temperature, and grinding to obtain the finished product.
9. The process for preparing the anti-galling lithium complex silicone oil grease as claimed in claim 8, wherein the weight ratio of lithium hydroxide monohydrate to water in the lithium hydroxide solution is 1: (5-6.5).
10. The process for preparing the anti-galling lithium-silicone-oil complex grease as claimed in claim 8, wherein the grinding is carried out in a three-roll machine, and the grease discharging speed of the three-roll machine is 1.1 to 1.7kg/min.
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