CN112795422B - Lubricating grease and preparation method thereof - Google Patents

Lubricating grease and preparation method thereof Download PDF

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Publication number
CN112795422B
CN112795422B CN201911033567.8A CN201911033567A CN112795422B CN 112795422 B CN112795422 B CN 112795422B CN 201911033567 A CN201911033567 A CN 201911033567A CN 112795422 B CN112795422 B CN 112795422B
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China
Prior art keywords
grease
base oil
lanolin
weight
effect
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CN112795422A (en
Inventor
何懿峰
白文娟
魏克成
陈靖
李华
李朝宇
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Sinopec Research Institute of Petroleum Processing
China Petroleum and Chemical Corp
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Sinopec Research Institute of Petroleum Processing
China Petroleum and Chemical Corp
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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
    • 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
    • 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
    • C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
    • 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/18—Natural waxes, e.g. ceresin, ozocerite, bees wax, carnauba; Degras
    • 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
    • C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
    • C10M2207/122—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms monocarboxylic
    • C10M2207/1225—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms monocarboxylic 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
    • C10M2207/127—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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
    • C10M2207/2825—Esters of (cyclo)aliphatic oolycarboxylic acids 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
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/10—Amides of carbonic or haloformic acids
    • C10M2215/102—Ureas; Semicarbazides; Allophanates
    • C10M2215/1026—Ureas; Semicarbazides; Allophanates used as thickening 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
    • C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
    • C10M2227/06—Organic compounds derived from inorganic acids or metal salts
    • C10M2227/065—Organic compounds derived from inorganic acids or metal salts derived from Ti or Zr
    • 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
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/04—Siloxanes with specific structure
    • C10M2229/041—Siloxanes with specific structure containing aliphatic substituents
    • C10M2229/0415—Siloxanes with specific structure containing aliphatic substituents used as base material

Abstract

Disclosed are a lubricating grease and a preparation method thereof. The lubricating grease comprises base oil, a thickening agent and a multi-effect antirust agent, wherein the multi-effect antirust agent comprises a reaction product of lanolin and metal alkoxide shown in the following formula (I), wherein in the formula (I), M is zirconium, titanium or hafnium; r 1 、R 2 、R 3 And R 4 May be the same or different and are each independently selected from C 1 ‑C 8 Alkyl radical, C 3 ‑C 8 Cycloalkyl and C 6 ‑C 10 And (4) an aryl group. The method comprises the steps of providing base oil, a thickening agent and a multi-effect antirust agent, and combining the base oil, the thickening agent and the multi-effect antirust agent to obtain the lubricating grease. Compared with the prior art, the lubricating grease contains a multi-effect antirust agent, can better solve the problem of competitive adsorption of antirust and extreme pressure antiwear agents, meets the protection and lubrication requirements under severe working conditions, and has excellent antirust property and extreme pressure antiwear property; meanwhile, the paint also has the performances of excellent adhesion, water resistance, colloid stability, corrosion resistance, salt mist resistance and the like. M (OR) 1 )(OR 2 )(OR 3 )(OR 4 ) Formula (I).

Description

Lubricating grease and preparation method thereof
Technical Field
The invention relates to lubricating grease, in particular to lubricating grease with excellent anti-rust and anti-wear functions and a preparation method thereof.
Background
The antirust agent for the lubricating grease usually comprises barium petroleum sulfonate, sodium petroleum sulfonate, zinc naphthenate, barium dinonylnaphthalene sulfonate, benzotriazole, alkenyl succinic acid and the like, and is characterized by having stronger polarity, being capable of being firmly adsorbed on the surface of metal and preventing water from contacting with the metal to play a role in rust prevention. Common extreme pressure antiwear agents for lubricating grease comprise nitrogen-containing sulfur phosphate derivatives, tricresyl phosphate, phenyl thiophosphate, sulfurized isobutylene, aminothio ester, dibutyl dithiocarbamic acid molybdenum oxysulfide and the like, and the action principle is that polar groups are adsorbed to the surface of metal to form a physical adsorption film or a chemical adsorption film, and then a chemical reaction is carried out to play an extreme pressure antiwear role. However, when both rust preventive agent and extreme pressure anti-wear agent are contained in the system, a problem of competitive adsorption occurs, and in severe cases, both rust preventive property and extreme pressure anti-wear property of the grease are impaired, and therefore, it is a problem to develop a grease having excellent rust preventive property and extreme pressure anti-wear property.
The lubricating grease with excellent rust resistance and lubricating property is required to be developed in the field, so that the problem of competitive adsorption of rust resistance and extreme pressure antiwear agents can be well solved, and the protection and lubrication requirements under severe working conditions are met.
Disclosure of Invention
The invention aims to provide lubricating grease with excellent antirust property and lubricating property, which is characterized by containing a multi-effect antirust agent, can better solve the problem of competitive adsorption of antirust and extreme pressure antiwear agents, and meets the protection and lubrication requirements under severe working conditions.
The application provides a lubricating grease comprising
Base oil
Thickening agent
A multi-effect rust inhibitor comprising the reaction product of lanolin and an organometallic compound having the following formula I,
M(OR 1 )(OR 2 )(OR 3 )(OR 4 ) Formula I
In the formula I, M is zirconium or titanium or hafnium,
R 1 、R 2 、R 3 and R 4 May be the same or different and are each independently selected from C 1 -C 8 Alkyl radical, C 3 -C 8 Cycloalkyl and C 6 -C 10 An aryl group; preferably R 1 、R 2 、R 3 And R 4 Are the same group.
In one embodiment of the grease of the present application, wherein the amount of said base oil is from 50 to 95 wt.%, preferably from 60 to 90 wt.%, most preferably from 70 to 90 wt.%, based on the weight of said grease; the amount of thickener is from 5 to 60 wt.%, preferably from 6 to 40 wt.%, most preferably from 8 to 30 wt.%, based on the weight of the grease; the amount of the multi-effect rust inhibitor is 0.5-30 wt%, preferably 1-20 wt%, more preferably 2-10 wt% based on the weight of the grease.
In one embodiment of the grease of the present application, the weight ratio of lanolin to metal alkoxide is 100:1-500, preferably 100:10-80.
In one embodiment of the grease of the present application, the base oil is selected from one or more of a mineral base oil, a synthetic base oil, a vegetable base oil.
In one embodiment of the grease of the present application, the thickener is selected from one or more of soap-based thickeners and non-soap-based thickeners.
The present application also provides a method of preparing a grease comprising the steps of:
providing a base oil and a thickener, or providing a base oil comprising a thickener;
providing a multi-effect rust inhibitor comprising the reaction product of lanolin and an organometallic compound having the following formula I,
M(OR 1 )(OR 2 )(OR 3 )(OR 4 ) Is of the formula(I)
In the formula (I), M is zirconium, titanium or hafnium;
R 1 、R 2 、R 3 and R 4 May be the same or different and are each independently selected from C 1 -C 8 Alkyl radical, C 3 -C 8 Cycloalkyl and C 6 -C 10 An aryl group; preferably R 1 、R 2 、R 3 And R 4 Are the same group;
combining a base oil, a thickener, and the multi-effect rust inhibitor, or combining the base oil containing the thickener with the multi-effect rust inhibitor, to obtain the grease.
In one embodiment of the method of preparing a grease of the present application, providing a multi-effect rust inhibitor comprises the steps of:
-reacting lanolin with said organometallic compound at a temperature of 60-100 ℃ to obtain a primary product;
-refining the primary product at a temperature of 140-230 ℃ to obtain the multi-effect rust inhibitor;
in one embodiment of the method of preparing a grease herein, the method further comprises the step of adding water to the primary product for further reaction.
Compared with the prior art, the lubricating grease contains a multi-effect antirust agent, can better solve the problem of competitive adsorption of antirust and extreme pressure antiwear agents, meets the protection and lubrication requirements under severe working conditions, and has excellent antirust property and extreme pressure antiwear property; meanwhile, the paint also has the performances of excellent adhesion, water resistance, colloid stability, corrosion resistance, salt mist resistance and the like. The product has simple preparation process and stable product quality.
Detailed Description
The technical solution of the present invention is further explained below according to specific embodiments. The scope of protection of the invention is not limited to the following examples, which are set forth for illustrative purposes only and are not intended to limit the invention in any way.
The present application provides a grease comprising
Base oil
Thickening agent
A multi-effect rust inhibitor comprising the reaction product of lanolin and a metal alkoxide having the following formula (I),
M(OR 1 )(OR 2 )(OR 3 )(OR 4 ) Formula (I)
In the formula (I), M is zirconium, titanium or hafnium;
R 1 、R 2 、R 3 and R 4 May be the same or different and are each independently selected from C 1 -C 8 Alkyl radical, C 3 -C 8 Cycloalkyl and C 6 -C 10 An aryl group; preferably R 1 、R 2 、R 3 And R 4 Are the same group.
The components of the grease are described separately below.
Base oil
The base oil is a dispersion medium in the grease dispersion system, and has a great influence on the performance of the grease. Base oils may generally include three types of mineral base oils, synthetic base oils, and vegetable base oils.
The mineral base oil is extracted from crude oil, and comprises the chemical components of a mixture of high-boiling-point and high-molecular-weight hydrocarbons and non-hydrocarbons, wherein the chemical components of the mixture generally comprise alkanes (straight chains, branched chains and multi-branched chains), cycloalkanes (monocyclic, bicyclic and polycyclic), aromatics (monocyclic and polycyclic), naphthenic aromatics and non-hydrocarbon compounds such as oxygen-containing, nitrogen-containing and sulfur-containing organic compounds and colloids and asphaltenes.
Synthetic base oils refer to base oils synthesized by chemical methods, and there are many kinds of synthetic base oils, and they are commonly: synthetic hydrocarbons such as Polyalphaolefins (PAOs), synthetic esters, polyethers, silicone oils, fluorine-containing oils, phosphate esters, and the like.
Vegetable base oils, which are derived from plant extracts and are becoming increasingly popular, have characteristics that mineral base oils and most synthetic base oils are not comparable to, namely biodegradability and rapid environmental pollution reduction, but vegetable base oils are expensive.
The base oils used in the present application may be mineral base oils, synthetic base oils, and vegetable base oils and mixtures thereof.The base oil has a kinematic viscosity of 1-100m at 100 deg.C 2 S, preferably 2 to 100mm 2 And(s) in the presence of a catalyst. In one embodiment, the amount of base oil is from 50 to 95 wt.%, preferably from 60 to 90 wt.%, most preferably from 70 to 90 wt.%, based on the weight of the grease.
2. Thickening agent
The thickening agent is an important component of the lubricating grease, and is dispersed in the base oil and forms a structural framework of the lubricating grease, so that the base oil is adsorbed and fixed in the structural framework. The water resistance and heat resistance of the grease are mainly determined by the thickener. There are two main classes of thickeners used in the preparation of greases: soap-based thickeners (i.e., fatty acid metal salts) and non-soap-based thickeners (hydrocarbon-based thickeners, organic thickeners, and inorganic thickeners).
The soap-based thickener is fatty acid metal salt, and can be divided into single soap-based thickeners, such as calcium soap thickener, sodium soap thickener, lithium soap thickener, aluminum soap thickener, etc.; mixed soap-based thickeners such as lithium calcium soap thickeners, calcium sodium soap thickeners, and the like; complex soap-based thickeners such as complex calcium-based thickeners, complex aluminum soap thickeners, complex lithium soap thickeners, and the like.
Non-soap based thickeners can be divided into hydrocarbon based thickeners, organic thickeners and inorganic thickeners. Common hydrocarbon-based thickeners include paraffin wax, ozokerite, petrolatum, and the like. Common organic thickeners include organic dyes, urea-based compounds, and the like. Common inorganic thickeners include bentonite, flocculated silica gel, and the like.
These thickeners may be prepared according to methods known in the art or purchased commercially.
In one embodiment, the thickener is present in an amount of from 5 to 60 wt.%, preferably from 6 to 40 wt.%, most preferably from 8 to 30 wt.%, based on the weight of the grease.
3. Additives and fillers
In addition to the base oil and thickener described above, greases also contain certain amounts of additives and fillers.
(1) Multi-effect antirust agent
The grease of the present application comprises a multi-effect rust inhibitor comprising the reaction product of lanolin and a metal alkoxide having the following formula (I),
M(OR 1 )(OR 2 )(OR 3 )(OR 4 ) Formula (I)
In the formula (I), M is zirconium, titanium or hafnium;
R 1 、R 2 、R 3 and R 4 May be the same or different and are each independently selected from C 1 -C 8 Alkyl radical, C 3 -C 8 Cycloalkyl and C 6 -C 10 An aryl group; preferably R 1 、R 2 、R 3 And R 4 Are the same group.
In the present application, M is preferably zirconium, i.e. the metal alkoxide is a zirconium alkoxide. Preferably, R 1 、R 2 、R 3 And R 4 Each independently selected from C 1 -C 8 Alkyl groups such as methyl, ethyl, n-propyl, isopropyl, n-butyl, t-butyl, n-pentyl, n-hexyl, n-octyl, and the like.
In one embodiment, the metal alkoxide is selected from zirconium methoxide, zirconium ethoxide, zirconium n-propoxide, zirconium isopropoxide, zirconium n-butoxide, zirconium t-butoxide, tetramethyl titanate, tetraethyl titanate, tetra-n-propyl titanate, tetra-isopropyl titanate, tetra-n-butyl titanate, tetra-t-butyl titanate, and combinations thereof.
Lanolin is a secreted fatty oil with CAS number 8006-54-0, mainly composed of esters of sterols, fatty alcohols and triterpene alcohols with about equal amounts of fatty acids, about 95%, and containing 4% free alcohol with small amounts of free fatty acids and hydrocarbons, which adheres to wool. The softening point is 38-44 ℃, the saponification value is 92-106 mgKOH/g, and the iodine value is about 18-36 mg I 2 /g。
The multi-effect rust inhibitors of the present application comprise the reaction product of lanolin and a metal alkoxide. In one embodiment, the multi-effect rust inhibitor of the present application is obtained by:
(1) Reacting lanolin with a metal alkoxide of formula (I) at a temperature of 60-100 ℃ to obtain a primary product;
(2) Refining the primary product at the temperature of 140-230 ℃ to obtain the multi-effect antirust agent.
The reaction of lanolin and the metal alkoxide of formula (I) may be carried out at a temperature of 60-100 ℃. Also, since alcohols are formed during the reaction, in one embodiment, the reaction may be performed under vacuum to facilitate removal of the formed alcohols. The relative degree of vacuum of the reaction can be selected according to the alcohol species to be removed.
In one embodiment, after the above reaction period, a certain amount of water may be added to step (1) and the reaction may be continued for a further period of time. The addition of water may promote the hydrolysis of the metal alkoxide and thus the reaction of lanolin with the metal alkoxide. The amount of water added may be 0 to 100% by weight, preferably 1 to 60% by weight, based on the weight of the metal alkoxide.
The product obtained in the step (1) can be further refined at the temperature of 140-230 ℃ to obtain the multi-effect antirust agent. One of the purposes of refining is to remove unreacted and volatile substances in the system to avoid introducing these substances into the final oil to affect the properties of the oil.
The process for the in situ preparation of the multi-effect rust inhibitor component is described below.
The multi-effect antirust agent has excellent antirust performance, extreme pressure abrasion resistance and oxidation resistance, and can be used for various antirust lubricating greases and lubricating oils.
Lanolin contains a plurality of esters which can be reacted with an alkoxide of formula (I) to introduce titanium, zirconium and/or hafnium into the lanolin system. The multi-effect antirust agent is a reaction product of lanolin and alkoxide shown in a formula (I), and has good antirust performance of the lanolin; meanwhile, because transition metal elements with special performance of titanium, zirconium and/or hafnium are introduced into the system, an oxide film of titanium, zirconium and/or hafnium with good abrasion resistance can be formed in the oil product added with the multi-effect antirust agent in the using process, so that the multi-effect antirust agent also has good extreme pressure abrasion resistance.
In one embodiment, the amount of the multi-effect rust inhibitor is from 0.5 to 30 wt.%, preferably from 1 to 20 wt.%, more preferably from 2 to 10 wt.%, based on the weight of the grease.
(2) Other additives
In addition to the multi-effect rust inhibitors of the present application, the greases of the present application may optionally also contain one or more other additives selected from one or more of antioxidants, extreme pressure anti-wear agents, rust inhibitors, texturing agents, and peptizers. The antioxidant may be, for example, an amine-based antioxidant such as diphenylamine, p-diisooctyldiphenylamine, etc.; phenolic antioxidants, such as 2, 6-di-t-butyl-p-cresol (BHT), and the like. Extreme pressure anti-wear agents include sulfides such as sulfurized olefins, and the like; chlorides such as chlorinated paraffin and the like; lead salts such as lead naphthenate and the like; other types of extreme pressure antiwear agents, such as molybdenum disulfide, and the like. The rust inhibitor can be sulfonate, such as barium petroleum sulfonate, and the like, and benzotriazole, and the like. The texturing agent may be, for example, polyisobutylene. The peptizing agent can be, for example, triethanolamine, and the like. The total amount of these other additives may be from 0.1 to 20 wt.%, for example from 1 to 10 wt.%, based on the total weight of the grease.
The present application also provides in a second aspect a method of preparing a grease comprising the steps of:
-providing a base oil and a thickener, or providing a base oil comprising a thickener;
providing a multi-effect rust inhibitor of the present application
-combining a base oil, a thickener and the multi-effect rust inhibitor, or combining the base oil comprising a thickener and the multi-effect rust inhibitor, resulting in the grease.
In preparing the greases of the present application, the base oil component, the thickener component, as well as the multi-effect rust inhibitor component of the present application and optional other additives may be provided separately and then combined to form the greases of the present application. Combining these components may include mixing, stirring, homogenizing, filtering, degassing, etc., and may be selected by one skilled in the art according to particular requirements.
In another embodiment, the viscosifying agent may be formed in situ in the base oil, resulting in a base oil comprising the viscosifying agent. For example, a base oil containing a thickener can be obtained by adding a raw material for preparing the thickener to a part of the base oil and forming the thickener in situ in the base oil using the base oil as a medium. The remaining base oil, the base oil containing the thickener, and the multi-effect rust inhibitor component of the present application and optionally other additives, etc. are then combined to form the grease of the present application. Combining these components may include mixing, stirring, homogenizing, filtering, degassing, etc., and may be selected by one skilled in the art according to particular requirements.
In this aspect, the provision of the multi-effect rust inhibitor can be found in the corresponding description of the first aspect, and will not be described herein.
The present application is further described below in terms of specific examples. In the following examples, all the starting materials are commercially available chemical reagents unless otherwise specified, and are not particularly limited.
Base oil 150BS, kinematic viscosity at 100 ℃ 31mm 2 (s) from petroleum cramaeychemical company, china;
base oil 500SN, kinematic viscosity at 100 ℃ of 11mm 2 (iv)/s, available from petrochemical Yanshan petrochemical, china;
base oil polyalphaolefin PAO10 having a kinematic viscosity at 100 ℃ of 10mm 2 (ii)/s, available from exxonmobil oil company;
lanolin is available from carbofuran technologies.
Preparation example 1: preparation of multi-effect antirust agent
The raw material components are as follows:
lanolin (softening point 38 ℃, saponification number 92mgKOH/g, iodine number 18mg I) 2 /g) 50kg; 12kg of zirconium tetra-n-butoxide (content 76%); 1.5kg of distilled water
Putting 50kg of lanolin into a 150L reaction kettle with heating, stirring, filtering and cooling functions, heating and stirring, heating to 60 ℃, adding 12kg of n-butyl alcohol zirconium, stirring for 30min, adding 1.5kg of distilled water, continuing to react for 2h, heating to 200 ℃, refining at a constant temperature for 5min, filtering while hot, and cooling the obtained filtrate to room temperature to obtain a finished product of the multi-effect antirust agent A (additive A).
Preparation example 2: preparation of multi-effect antirust agent
The raw material components are as follows:
lanolin (softening point 42 ℃, saponification value 104mgKOH/g, iodine value 28mg I) 2 /g) 50kg; 24kg of n-butyl zirconium (with the content of 76%); 4kg of distilled water
Putting 50kg of lanolin into a 150L reaction kettle which is heated, stirred, filtered, cooled and vacuumized, heating and stirring, heating to 90 ℃, adding 24kg of n-butyl alcohol zirconium, reacting for 15min, adding 4kg of distilled water, continuing to react for 4h, and vacuumizing and depressurizing the container to remove the generated n-butyl alcohol. And then heating to 160 ℃, refining at constant temperature for 30min, filtering while hot, and cooling the obtained filtrate to room temperature to obtain a finished product of the multi-effect antirust agent B (additive B).
Preparation example 3: preparing the multi-effect antirust agent.
The raw material components are as follows:
lanolin (softening point 39 ℃, saponification value 98mgKOH/g, iodine value 32 mgI) 2 /g)100kg
Zirconium tert-Butanol (99% content) 34kg
6kg of distilled water
Putting 100kg of lanolin into a 200L reaction kettle with functions of heating, stirring, filtering and cooling, heating and stirring, heating to 80 ℃, adding 34kg of zirconium tert-butoxide, reacting for 20min, adding 6kg of distilled water, continuing to react for 1h, heating to 220 ℃, refining at constant temperature for 5min, filtering while hot, and cooling the obtained filtrate to room temperature to obtain the lanolin fatty acid ester
A multi-effect rust inhibitor C (additive C).
Preparation example 4
The procedure of production example 3 was repeated except that 24kg of zirconium ethoxide (99%) was used in place of 34kg of zirconium t-butoxide used in production example 3 while adding 7kg of distilled water, to finally obtain rust preventive D.
Preparation example 5
The procedure of production example 3 was repeated except that 62kg of zirconium n-propoxide (23%) was used in place of 34kg of zirconium t-butoxide used in production example 3 while distilled water was added in an amount of 17kg, to finally obtain rust preventive E.
Preparation example 6
The procedure of production example 3 was repeated except that 12.8kg of tetraisopropyl titanate was used in place of 34kg of zirconium t-butoxide used in production example 3 while distilled water was added instead of 4kg, to finally obtain rust inhibitor F.
Preparation example 7
The procedure of production example 3 was repeated except for using 6.4kg of tetraisopropyl titanate (98%) and 11.1kg of zirconium n-butoxide (76%) in place of 34kg of zirconium t-butoxide used in production example 3, to finally obtain rust inhibitor G.
Test example
To evaluate the performance thereof, the most commonly used lithium-based base grease at present was prepared as follows, and the obtained multi-effect rust inhibitor was added thereto in a certain ratio.
50kg of a base oil 500SN oil (viscosity 11mm at 100 ℃) is added into a reaction kettle with a volume of 200L and with heating, stirring, circulating and cooling functions 2 And/s) and 10kg of 12-hydroxystearic acid, stirring, heating to 80 ℃ to obtain a uniform system, slowly adding 1.43kg of lithium hydroxide monohydrate and 5kg of water, heating to 105 ℃, draining, saponifying for 2 hours, heating to 210 ℃, adding 20kg of 500SN oil, stirring, cooling, homogenizing, filtering, degassing, and discharging from a kettle to obtain a lithium-based basic grease, wherein the lithium-based basic grease comprises the following components: 87.3 percent of base oil and 12.7 percent of thickening agent.
For comparison with the multi-effect rust inhibitor of the present application, commercially available lanolin calcium rust inhibitor (available from CRODA, crobar RP 5) and lanolin magnesium rust inhibitor (available from shandong lyon new material technology ltd) were purchased for comparison.
The preparation method of the lubricating grease comprises the following steps:
taking a certain amount of the lithium base grease, heating to 80 ℃, respectively adding 1% of additive, stirring for 10min, and grinding for 2 times by using a three-roll mill to obtain the lubricating grease.
The grease obtained was tested for parameters such as dropping point, working cone penetration, etc. according to the test methods listed in table 1 below. The test results are listed in table 1 below.
Table 1 grease testing parameters and results
Figure BDA0002250818680000091
Figure BDA0002250818680000101
Note: the pressure drop was too great and the test was not completed.
PB represents maximum seizure-free load, PD represents sintering load
Table 1 grease test parameters and results
Figure BDA0002250818680000102
As can be seen from Table 1, when the same amount of the multi-effect rust inhibitor of the present invention was added to lithium grease along with commercially available calcium lanolin rust inhibitor and magnesium lanolin rust inhibitor, the multi-effect rust inhibitor of the present invention did not damage the gel structure of the grease, and even slightly improved the structure.
The copper sheet corrosion results show that the lubricating grease using the multi-effect rust inhibitor of the invention, the commercially available lanolin calcium rust inhibitor and lanolin magnesium rust inhibitor all reach the 1b grade, but the results of dynamic saline rust inhibition tests show that the lubricating grease using the multi-effect rust inhibitor of the invention has an effect obviously superior to the lubricating grease using the prior lanolin calcium rust inhibitor and lanolin magnesium rust inhibitor: the grease using the prior art calcium lanolin rust inhibitor and magnesium lanolin rust inhibitor can reach grade 2-3, while the grease using the multi-effect rust inhibitor of the present invention can reach grade 0.
Meanwhile, as the PB and PD results show, the lubricating grease using the multi-effect antirust agent also has a remarkable extreme pressure anti-wear effect: the PB value is improved by 2-3 times, and the PD value is improved by more than 50%, compared with the lubricating grease using the lanolin calcium antirust agent and the lanolin magnesium antirust agent in the prior art.
In addition, as shown by the oxidation stability test result, the multi-effect antirust agent also shows remarkable antioxidation, but the grease using the prior lanolin calcium antirust agent and the grease using the lanolin magnesium antirust agent and the grease without the antirust agent can not complete the oxidation stability test.
Example 1: preparation of lubricating greases
The raw material components are as follows: 12-hydroxystearic acid (10 kg); lithium hydroxide monohydrate (1.4 kg); base oil 500SN (100 kg), additive A (4 kg).
(a) Adding 70kg of 500SN oil and 10kg of 12-hydroxystearic acid into a reaction kettle with the capacity of 200L and the functions of heating, stirring, circulating and cooling, stirring, heating to 80 ℃ to become a uniform system, slowly adding 1.4kg of lithium hydroxide monohydrate and 5kg of water into the uniform system, heating to 105 ℃ and saponifying for 2 hours to obtain a product serving as a thickening agent;
(b) Heating the product obtained in the step (a) to 210 ℃, keeping the temperature for 10min, adding 30kg of 500SN oil, stirring and cooling, adding 4kg of additive A at 100 ℃, stirring for 10min, then homogenizing, filtering, degassing, discharging from the kettle to obtain lubricating grease, and the test result is shown in Table 2. According to the material feeding amount, the composition of the lubricating grease can be calculated as follows: 87.6 weight percent of base oil and 8.9 weight percent of thickening agent; additive a 3.5 wt%. The physical and chemical properties of the grease were analyzed and the results are shown in table 2.
Example 2: preparation of lubricating greases
The raw material components are as follows: 12-hydroxystearic acid (10 kg); azelaic acid (2 kg); lithium hydroxide monohydrate (2.3 kg); poly-alpha-olefin PAO10 (90 kg), diisodecyl sebacate (30 kg); additive A (2 kg).
(a) Adding 90kg of PAO10 oil, 10kg of 12-hydroxystearic acid and 2kg of azelaic acid into a reaction kettle with the volume of 200L and the functions of heating, stirring, circulating and cooling, stirring, heating to 80 ℃ to become a uniform system, slowly adding 1.4kg of lithium hydroxide monohydrate and 5kg of water, heating to 100 ℃ and saponifying for 2 hours to obtain a product serving as a thickening agent;
(b) Heating the product obtained in the step (a) to 210 ℃, keeping the temperature for 5min, adding 30kg of diisodecyl sebacate quenching oil, stirring and cooling, adding 2kg of additive A at 100 ℃, stirring for 5min, homogenizing, filtering, degassing, discharging from a kettle to obtain lubricating grease, wherein the inspection result is shown in table 2. According to the material feeding amount, the composition of the lubricating grease can be calculated as follows: 89.3 wt% of base oil and 9.2 wt% of thickening agent; additive a 1.5 wt%. The physical and chemical properties of the grease were analyzed and the results are shown in table 2.
Example 3: preparation of lubricating greases
The raw material components are as follows: 12-hydroxystearic acid (5 kg); acetic acid (7 kg); calcium hydroxide (5.2 kg); methyl silicone oil (201-100, kinematic viscosity at 25 ℃ of 100 mm) 2 (s) from Wasin Industrial trade, inc., ding Zhong Hua in Beijing (70 kg); 150BS (30 kg); additive B (3 kg).
(a) Preparation of a thickening agent: 70kg of methyl silicone oil and 5kg of 12-hydroxystearic acid are added into a reaction kettle I with the capacity of 150L and with heating, stirring, circulating and cooling functions, stirred and heated to 95 ℃ to form a uniform system.
Slowly adding 5.2kg of calcium hydroxide into 8kg of water in another container II, uniformly stirring, adding 7kg of acetic acid, and reacting for 30min for later use.
And (3) slowly adding the materials in the container II into the reaction kettle I, heating to 100 ℃ after reacting for 1h, draining, saponifying for 1h, heating to 200 ℃, keeping the temperature for 5min, adding 30kg of 150BS oil, stirring, cooling, adding 3kg of additive B at 80 ℃, stirring for 5min, homogenizing, filtering, degassing, discharging from the kettle to obtain lubricating grease, wherein the inspection result is shown in Table 2. According to the material feeding amount, the composition of the lubricating grease can be calculated as follows: 84.9 weight percent of base oil and 12.6 weight percent of thickening agent; additive B2.5% by weight. The physical and chemical properties of the grease were analyzed and the results are shown in table 2.
Example 4: preparation of lubricating greases
The raw material components are as follows: diphenylmethane diisocyanate (MDI, 8.33 kg); n-octylamine (8.6 kg); 500SN (100 kg); additive B (7 kg).
70kg of 500SN base oil and 8.33kg of MDI are added into a normal pressure reaction kettle with the capacity of 200L and with the functions of heating, stirring, circulating and cooling, the mixture is heated to 100 ℃ and becomes a homogeneous system, the stirring is carried out for 10 minutes, 8.6kg of n-octylamine is added, the stirring is carried out for 30 minutes, then the temperature is increased to 180 ℃ and is kept for 10 minutes, 30kg of 500SN oil is added, the stirring is carried out for cooling, 7kg of additive B is added at 80 ℃ and is stirred for 10 minutes, the homogenization, the filtration and the degassing are carried out, the lubricating grease is obtained after the mixture is taken out of the kettle, and the inspection result is shown in Table 1. According to the calculated material feeding amount, the lubricating grease comprises the following components: 80.7 weight percent of base oil and 13.7 weight percent of thickening agent; additive B5.6 wt%. The physical and chemical properties of the grease were analyzed and the results are shown in table 2.
Example 5: preparation of lubricating greases
A grease was prepared as in example 1, except that additive A was replaced with additive D. The physical and chemical properties of the grease were analyzed and the results are shown in table 2.
Example 6: preparation of lubricating greases
A grease was prepared as in example 2, except that additive A was replaced with additive E. The physical and chemical properties of the grease were analyzed, and the results are shown in table 2.
Example 7: preparation of lubricating greases
A grease was prepared as in example 3, except that additive B was replaced with additive F. The physical and chemical properties of the grease were analyzed and the results are shown in table 2.
Example 8: preparation of lubricating greases
A grease was prepared as in example 4, except that additive B was replaced with additive G. The physical and chemical properties of the grease were analyzed and the results are shown in table 2.
Comparative example 1
The raw material components are as follows: 12-hydroxystearic acid (10 kg); lithium hydroxide monohydrate (1.4 kg); 500SN (100 kg).
(a) Adding 70kg of 500SN oil and 10kg of 12-hydroxystearic acid into a reaction kettle with the capacity of 200L and with heating, stirring, circulating and cooling functions, stirring, heating to 80 ℃ to form a uniform system, slowly adding 1.4kg of lithium hydroxide monohydrate and 5kg of water into the uniform system, heating to 105 ℃ and saponifying for 2 hours to obtain a product serving as a thickening agent;
(b) Heating the product obtained in the step (a) to 210 ℃, keeping the temperature for 10min, adding 30kg of 500SN quenching oil, stirring, cooling, homogenizing, filtering, degassing, discharging from the kettle to obtain lubricating grease, and the inspection result is shown in Table 2. According to the material feeding amount, the composition of the lubricating grease can be calculated as follows: 90.7 wt% of base oil and 9.3 wt% of thickening agent; the test results are shown in Table 2.
Comparative example 2: preparation of lubricating greases
Grease was prepared according to the method of example 1 except that additive A was replaced by 1% T202 (from Wuxi south Petroleum additives Co., ltd.), 1.5% T323 (from Jinzhou Contai lubricating oil additives Co., ltd.), 0.5% T704 (from Hongze Zhongpeng Petroleum additives Co., ltd.), 0.5% T706 (from Nanjing Kyokungke Fine chemical Co., ltd.). The physical and chemical properties of the grease were analyzed and the results are shown in table 2.
Table 2 performance data for each grease sample
Figure BDA0002250818680000141
PB represents maximum seizure-free load, PD represents sintering load
Table 2 performance data for each grease sample
Figure BDA0002250818680000151
It will be understood by those skilled in the art that working penetration is a measure of the consistency and hardness of a grease, and that a greater working penetration indicates a softer grease, and vice versa indicates a harder grease; the smaller the difference between the working cone penetration and the working cone penetration is, the better the mechanical stability of the lubricating grease is; the smaller the water leaching loss, the better the water resistance of the lubricating grease; the higher the salt spray test grade is, the lower the water spray resistance value is, and the better the rust resistance and the corrosion resistance of the lubricating grease are; the smaller the oil separation value of the steel mesh is, the better the colloid stability of the lubricating grease is; the bigger the PB and PD values are, the better the extreme pressure abrasion resistance of the lubricating grease is, and the lubricating performance is excellent.
The above results show that the lubricating grease of the invention has excellent rust resistance and extreme pressure wear resistance compared with the prior art. Meanwhile, the paint also has the performances of excellent adhesiveness, water resistance (shown as water spray loss), colloid stability (steel mesh oil separation), corrosion resistance (shown as corrosion resistance), salt spray resistance (shown as a salt spray test) and the like:
as shown in Table 2, examples 1-4 containing the multi-effect rust inhibitor of the present application all passed the corrosion protection, while comparative examples without the multi-effect rust inhibitor of the present application failed the corrosion protection.
The water shower loss was significantly lower for examples 1-4 containing the multi-effect rust inhibitor of the present application, indicating that examples 1-4 had better water resistance than the comparative examples without the multi-effect rust inhibitor of the present application.
The steel meshes of examples 1-4 containing the multi-effect rust inhibitor of the present application all had significantly lower oil separation, and compared with the comparative example not containing the multi-effect rust inhibitor of the present application, it is shown that examples 1-4 have better colloid stability.
Examples 1-4, which contained the multi-effect rust inhibitor of the present application, had significantly higher PB and PD values than the comparative example, which did not contain the multi-effect rust inhibitor of the present application. For example, the PB value of the comparative example is only 10 and the PD value is only 160, while the PB values of examples 1-4 are 6-12 times that of the comparative example and the PD values of examples are 1.2-2.5 times that of the comparative example, all of which are significantly improved. This indicates that examples 1-4 have better extreme pressure antiwear properties.
The salt spray test registrations of examples 1-4 containing the multi-effect rust inhibitor of the present application were all class a, while the comparative example without the multi-effect rust inhibitor of the present application was only class E, indicating that examples 1-4 have better salt spray resistance.
It should be noted by those skilled in the art that the described embodiments of the present invention are merely exemplary and that various other substitutions, alterations, and modifications may be made within the scope of the present invention. Accordingly, the present invention is not limited to the above-described embodiments, but is only limited by the claims.

Claims (14)

1. A grease comprising
A base oil which is a mixture of a base oil,
a thickening agent, and a water-soluble polymer,
a multi-effect rust inhibitor comprising the reaction product of lanolin and a metal alkoxide having the following formula (I),
M(OR 1 )(OR 2 )(OR 3 )(OR 4 ) Formula (I)
In the formula (I), M is zirconium, titanium or hafnium;
R 1 、R 2 、R 3 and R 4 May be the same or different and are each independently selected from C 1 -C 8 Alkyl radical, C 3 -C 8 Cycloalkyl radicalsAnd C 6 -C 10 An aryl group;
the lanolin contains sterol, fatty alcohol and triterpene alcohol as main components, which are 95% esters of fatty acid, 4% free alcohol, and small amount of free fatty acid and hydrocarbon.
2. The grease of claim 1, wherein R 1 、R 2 、R 3 And R 4 Are the same group.
3. The grease of claim 1, wherein the amount of base oil is 50-95 wt.%, based on the weight of the grease;
the amount of the thickening agent is 5-60 wt% based on the weight of the lubricating grease;
the amount of the multi-effect antirust agent is 0.5-30 wt% based on the weight of the lubricating grease;
wherein the sum of the weight percentages of the components in the grease is 100 weight percent.
4. The grease of claim 3, wherein the amount of base oil is 60-90 wt.%, based on the weight of the grease;
the amount of the thickening agent is 6-40 wt% based on the weight of the lubricating grease;
the amount of the multi-effect antirust agent is 1-20 wt% based on the weight of the lubricating grease;
wherein the sum of the weight percentages of the components in the grease is 100 weight percent.
5. The grease of claim 4, wherein the amount of base oil is 70-90 wt.%, based on the weight of the grease;
the amount of the thickening agent is 8-30 wt% based on the weight of the lubricating grease;
the amount of the multi-effect antirust agent is 2-10 wt% based on the weight of the lubricating grease;
wherein the sum of the weight percentages of the components in the grease is 100 weight percent.
6. The grease of claim 1, wherein the metal alkoxide is selected from zirconium methoxide, zirconium ethoxide, zirconium n-propoxide, zirconium isopropoxide, zirconium n-butoxide, zirconium t-butoxide, tetramethyl titanate, tetraethyl titanate, tetra-n-propyl titanate, tetra-isopropyl titanate, tetra-n-butyl titanate, tetra-t-butyl titanate, and combinations thereof.
7. The grease of claim 1, wherein the weight ratio of lanolin to metal alkoxide is 100:1-500.
8. The grease of claim 1, wherein the weight ratio of lanolin to metal alkoxide is 100:10-80.
9. A method of preparing a grease comprising the steps of:
providing a base oil and a thickener, or providing a base oil comprising a thickener;
providing a multi-effect rust inhibitor comprising the reaction product of lanolin and a metal alkoxide having the following formula (I),
M(OR 1 )(OR 2 )(OR 3 )(OR 4 ) Formula (I)
In the formula (I), M is zirconium, titanium or hafnium;
R 1 、R 2 、R 3 and R 4 May be the same or different and are each independently selected from C 1 -C 8 Alkyl radical, C 3 -C 8 Cycloalkyl and C 6 -C 10 An aryl group;
the main components of the lanolin are sterol, fatty alcohol and ester formed by triterpene alcohol and equivalent fatty acid, the ester accounts for about 95 percent, the lanolin also contains free alcohol 4 percent, and a small amount of free fatty acid and hydrocarbon substances;
combining the base oil, the thickener, and the multi-effect rust inhibitor, or combining the base oil containing the thickener with the multi-effect rust inhibitor, to obtain the grease.
10. The method of claim 9, wherein R 1 、R 2 、R 3 And R 4 Are the same group.
11. The method of claim 10, wherein providing the multi-effect rust inhibitor comprises the steps of:
-reacting lanolin with said metal alkoxide at a temperature of 60-100 ℃ to obtain a primary product;
-refining the primary product at a temperature of 140-230 ℃ to obtain the multi-effect rust inhibitor.
12. The method of claim 11, further comprising the step of adding water to said primary product for further reaction.
13. The method of claim 11, wherein the weight ratio of lanolin to metal alkoxide is 100:1-500.
14. The method of claim 13, wherein the weight ratio of lanolin to metal alkoxide is 100:10-80.
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