CN114106914B - Engine protective coating liquid and preparation method thereof - Google Patents
Engine protective coating liquid and preparation method thereof Download PDFInfo
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- CN114106914B CN114106914B CN202111351175.3A CN202111351175A CN114106914B CN 114106914 B CN114106914 B CN 114106914B CN 202111351175 A CN202111351175 A CN 202111351175A CN 114106914 B CN114106914 B CN 114106914B
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- 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
- C10M169/04—Mixtures of base-materials and additives
- C10M169/048—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution, non-macromolecular and macromolecular compounds
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- 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
- C10M169/04—Mixtures of base-materials and additives
- C10M169/047—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution and macromolecular compounds
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/04—Elements
- C10M2201/041—Carbon; Graphite; Carbon black
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- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
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- C10M2201/05—Metals; Alloys
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/061—Carbides; Hydrides; Nitrides
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- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/065—Sulfides; Selenides; Tellurides
- C10M2201/066—Molybdenum sulfide
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- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/026—Butene
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- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/102—Polyesters
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- C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
- C10M2213/06—Perfluoro polymers
- C10M2213/0613—Perfluoro polymers used as thickening agents
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- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2215/042—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Alkoxylated derivatives thereof
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- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/044—Polyamides
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/02—Pour-point; Viscosity index
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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/04—Detergent property or dispersant property
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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
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- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
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Abstract
The invention discloses an engine protective coating liquid and a preparation method thereof, wherein the engine protective coating liquid comprises the following components: base oil, polytetrafluoroethylene, polyamide-imide, a benzocyclobutene-based adhesive, polyisobutylene and a dispersing agent. The engine protective coating liquid has good repairing performance, can effectively form a transfer film on the surface of metal, thus playing a role in filling up surface abrasion, improving the working condition of an engine, and the film layer also has lubricating performance, thus being beneficial to reducing surface friction and prolonging the service life of the engine; the polyamide-imide can be synergistic with polytetrafluoroethylene, so that the adhesion between the film and the metal surface can be enhanced, the film is prevented from falling off, the duration of the repair effect and the protection time limit of the film are prolonged, and the corrosion resistance of the film can be improved.
Description
Technical Field
The invention relates to the technical field of vehicle maintenance, in particular to an engine protective coating liquid and a preparation method thereof.
Background
An Engine is a machine that can convert other forms of energy into mechanical energy, is the "heart" of an automobile, and is the source of automobile power. The engine mainly comprises parts such as a cylinder body, a cylinder sleeve, a cylinder cover, a cylinder gasket and the like. When the engine works, high-speed friction and high temperature are often accompanied, so that the metal surface is damaged, and the problems of oil consumption increase, insufficient power and environmental protection index gliding can be caused after the engine runs for a period of time. Therefore, it is desirable to repair metal surfaces with repair products to reduce wear, reduce friction, and extend the life of the engine.
Disclosure of Invention
The invention mainly aims to provide an engine protective coating liquid and a preparation method thereof, and aims to provide the engine protective coating liquid which can effectively form a transfer film on the surface of a metal, and has strong bonding force between a film layer and the surface of the metal and good repairing effect.
In order to achieve the purpose, the invention provides an engine protective coating liquid which comprises the following components: base oil, polytetrafluoroethylene, polyamide-imide, a benzocyclobutene-based adhesive, polyisobutylene and a dispersing agent.
Optionally, the composition comprises the following components in parts by weight: 20-70 parts of base oil, 4-15 parts of polytetrafluoroethylene, 1-5 parts of polyamide-imide, 3-5 parts of a benzocyclobutene polyester adhesive, 8-20 parts of polyisobutylene and 10-30 parts of a dispersing agent.
Optionally, the composition comprises the following components in parts by weight: 50-65 parts of base oil, 8-12 parts of polytetrafluoroethylene, 2-3 parts of polyamide-imide, 3-5 parts of a benzocyclobutene polyester adhesive, 10-15 parts of polyisobutylene and 12-25 parts of a dispersing agent.
Optionally, the composition comprises the following components in parts by weight: 60 parts of base oil, 10 parts of polytetrafluoroethylene, 2.5 parts of polyamide-imide, 5 parts of a styrene-butadiene adhesive, 12 parts of polyisobutylene and 20 parts of a dispersing agent.
Optionally, the base oil is a 100N lubricant base oil or a 150N lubricant base oil; and/or the presence of a gas in the atmosphere,
the particle size of the polytetrafluoroethylene is 0.2-0.4 mu m; and/or the presence of a gas in the atmosphere,
the dispersing agent is a perfluorinated surfactant FC-400.
Optionally, the material also comprises boron nitride, nano molybdenum disulfide, nano graphite and nano nickel powder.
Optionally, 0.8-2 parts of boron nitride, 0.8-2 parts of nano molybdenum disulfide, 0.2-1 part of nano graphite and 0.2-1 part of nano nickel powder are correspondingly added into every 10 parts of polytetrafluoroethylene; and/or the presence of a gas in the atmosphere,
the particle sizes of the nano molybdenum disulfide, the nano graphite and the nano nickel powder are all 5-50 nm.
Optionally, triethanolamine is also included.
In addition, the present invention also provides a preparation method of the engine protective coating liquid as described above, comprising the steps of:
s10, adding polytetrafluoroethylene into a dispersing agent, and dispersing for 25-45 min under the conditions that the temperature is not higher than 50 ℃ and the rpm is 1000-2000 rpm;
s20, sequentially adding base oil and polyisobutylene, dispersing for 30-50 min at the temperature of not higher than 50 ℃ and at 200-600 rpm, and filtering;
s30, adding polyamide-imide and a benzocyclobutene polyester adhesive, dispersing for 30-50 min at the temperature of not higher than 50 ℃ and at the speed of 200-600 rpm, and filtering to obtain the engine protective coating liquid.
Optionally, step S10 includes:
s101, adding boron nitride, nano molybdenum disulfide, nano graphite and nano nickel powder into polytetrafluoroethylene, and performing ultrasonic dispersion to form a dispersion solution;
s102, adding the dispersion solution into a dispersing agent, and dispersing for 25-45 min under the conditions of not higher than 50 ℃ and 1000-2000 rpm.
According to the technical scheme provided by the invention, the base oil, the polytetrafluoroethylene, the polyamide-imide, the benzene butylene polyester adhesive, the polyisobutylene and the dispersing agent are combined, so that the formed engine protective coating liquid has good repairing performance, a transfer film can be effectively formed on the metal surface, the effect of filling surface abrasion is achieved, the working condition of an engine can be improved, and the film layer also has lubricating performance, so that the surface friction is reduced, and the service life of the engine is prolonged; the polyamide-imide can be cooperated with polytetrafluoroethylene to increase the synergy, so that the adhesion between the film and the metal surface can be enhanced, the film can be prevented from falling off, the duration of the repair effect and the protection time limit of the film can be prolonged, and the corrosion resistance of the film can be improved; the phenylbutenyl polyester adhesive can further enhance the adhesion between the film layer and the metal surface; the dispersing agent is beneficial to improving the dispersibility and stability of each component of the coating liquid and ensuring the performance stability and the service life of the coating liquid; the polyisobutene is beneficial to improving the viscosity index of the product and improving the quality of the oil product.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a preparation method of the engine protective coating liquid provided by the invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were carried out according to 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. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention. 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 invention.
An Engine is a machine capable of converting other forms of energy into mechanical energy, and is the "heart" of an automobile, which is the source of automobile power. The engine mainly comprises parts such as a cylinder body, a cylinder sleeve, a cylinder cover, a cylinder gasket and the like. When the engine works, high-speed friction and high temperature are always accompanied, so that the metal surface is damaged, and the problems of oil consumption increase, insufficient power and environmental protection index gliding can be caused after the engine runs for a period of time. Therefore, it is desirable to repair metal surfaces with repair products to reduce wear, reduce friction, and extend engine life.
The invention provides an engine protective coating liquid, which comprises the following components: base oil, polytetrafluoroethylene, polyamide-imide, a benzocyclobutene-based adhesive, polyisobutylene and a dispersing agent.
According to the technical scheme provided by the invention, the base oil, the polytetrafluoroethylene, the polyamide-imide, the benzene butylene polyester adhesive, the polyisobutylene and the dispersing agent are combined, so that the formed engine protection coating liquid has good repairing performance, a transfer film can be effectively formed on the metal surface, the effect of filling surface abrasion is achieved, the working condition of an engine can be improved, the film layer also has lubricating performance, the surface friction is favorably reduced, and the service life of the engine is prolonged. In addition, the thickness of the coating is usually between 15 and 20 micrometers, so that not only can some deep grinding marks be repaired, but also the effects of repairing, lubricating and resisting corrosion can be well played, and in addition, the normal operation of engine parts cannot be influenced because the thickness of the film layer is in a micron order.
The polytetrafluoroethylene can fill the gaps at the sunken positions of the wear surfaces, has the characteristics of high temperature resistance, corrosion resistance, friction resistance and the like, has stable chemical properties and high lubricity, and can be combined with the metal surface by a coating formed on the metal surface by coating liquid taking the polytetrafluoroethylene as a raw material. However, the associativity is still limited, if polytetrafluoroethylene is taken as a raw material, a formed film layer is easy to fall off and peel, so that the repairing effect is limited, or the duration of the repairing effect is short.
The phenylbutenyl polyester adhesive can further enhance the adhesion between the film layer and the metal surface; the dispersing agent is beneficial to improving the dispersibility and stability of each component of the coating liquid and ensuring the performance stability and the service life of the coating liquid; the polyisobutylene is beneficial to improving the viscosity index of a product, improving the stability of the coating liquid and prolonging the storage time of the coating liquid.
After a large number of experiments, the inventor finds that the components have better performance when combined in the following weight portions. Specifically, the engine protective coating liquid of the embodiment comprises the following components in parts by weight: 20-70 parts of base oil, 4-15 parts of polytetrafluoroethylene, 1-5 parts of polyamide-imide, 3-5 parts of a benzocyclobutene polyester adhesive, 8-20 parts of polyisobutylene and 10-30 parts of a dispersing agent. Further, the engine protective coating liquid comprises the following components in parts by weight: the paint comprises the following components in parts by weight: 50-65 parts of base oil, 8-12 parts of polytetrafluoroethylene, 2-3 parts of polyamide-imide, 3-5 parts of a benzocyclobutene-based adhesive, 10-15 parts of polyisobutylene and 12-25 parts of a dispersing agent. Further, the engine protection coating liquid comprises the following components in parts by weight: 60 parts of base oil, 10 parts of polytetrafluoroethylene, 2.5 parts of polyamide-imide, 5 parts of a benzene butylene polyester adhesive, 12 parts of polyisobutylene and 20 parts of a dispersing agent. As a preferred embodiment, when the engine protective coating liquid consists of 60 parts of base oil, 10 parts of polytetrafluoroethylene, 2.5 parts of polyamide-imide, 5 parts of a benzene butylene polyester adhesive, 12 parts of polyisobutylene and 20 parts of a dispersing agent, the engine protective coating liquid can form a coating which is tightly combined with a metal surface, has a good repairing effect, and has good lubricating effect, corrosion resistance and long service life.
Specifically, in the engine protection coating liquid, the base oil is 100N lubricating oil base oil or 150N lubricating oil base oil, is cheap and common, has good compatibility with other components, and contributes to exerting the characteristics of the other components to the maximum extent; the particle size of the polytetrafluoroethylene is 0.2-0.4 mu m, the polytetrafluoroethylene with the particle size distributed in the particle size range can be rapidly formed into a film, and the strength of the formed film is higher; the dispersing agent is a perfluorinated surfactant FC-400, the perfluorinated surfactant FC-400 has high surface activity, high heat-resistant stability and low surface tension, and when the perfluorinated surfactant FC-400 is used as the dispersing agent, the dispersibility and stability of each component of the coating liquid can be well improved, and particularly the stability of a fluorine-containing component, namely polytetrafluoroethylene, is greatly improved.
Further, in a preferred embodiment, the engine protection coating liquid further includes boron nitride, nano molybdenum disulfide, nano graphite, and nano nickel powder. By adding the nano particles, the nano particles have better surface energy and can be adsorbed on the surface of metal to form an adsorption film, so that the wear resistance of the inner wall of the engine is improved; in addition, the particle size of the nano particles is in the nanometer level, so that the nano particles can be deposited in the scratches and the grinding marks when being adsorbed on the surface of the metal, thereby filling the scratches and the grinding marks and playing a repairing role. Specifically, the nano particles comprise a mixture of nano graphite, nano nickel powder and nano molybdenum disulfide. The nano graphite is combined with the metal surface to form a protective film, so that the lubricating and protecting effects are achieved; the nano molybdenum disulfide can be adsorbed on the worn surface to form a protective film, so that the effects of repairing, protecting, lubricating and resisting wear are achieved, meanwhile, the nano molybdenum disulfide has a stronger adhesion effect, the adhesion effect between a film layer formed by coating liquid and metal can be enhanced, and the effective period of the film layer is prolonged; the nano nickel not only can play a role in repairing effect, but also can play a role in improving the abrasion resistance and extreme pressure resistance of the lubricating oil. In addition, the nanometer molybdenum disulfide and the boron nitride can play a synergistic effect, and the high-temperature stability of the coating liquid can be effectively improved, so that the coating liquid is more suitable for the running environment of an engine.
Furthermore, 0.8-2 parts of boron nitride, 0.8-2 parts of nano molybdenum disulfide, 0.2-1 part of nano graphite and 0.2-1 part of nano nickel powder are correspondingly added into every 10 parts of polytetrafluoroethylene. In addition, the particle sizes of the nano molybdenum disulfide, the nano graphite and the nano nickel powder are all 5-50 nm. The nano particles in the particle size range can better fill grinding marks and have better lubrication effect, so that the wear resistance of the surface of the part is improved.
In addition, in some embodiments, the engine protection coating fluid further comprises triethanolamine. The triethanolamine has a good stabilizing effect on a suspension system, and the stability of the nanoparticles in a mixed system is improved by adding the triethanolamine, so that the nanoparticles can be uniformly dispersed in the cleaning agent, and agglomeration is avoided. The addition amount of triethanolamine is based on the total parts of nanoparticles, and specifically, the ratio of the total parts of nanoparticles to triethanolamine is 1: 2-8.
Based on the embodiment, the invention further provides a preparation method of the engine protective coating liquid. Referring to fig. 1, the preparation method of the engine protective coating liquid includes the following steps:
s10, adding polytetrafluoroethylene into a dispersing agent, and dispersing for 25-45 min under the conditions that the temperature is not higher than 50 ℃ and the rpm is 1000-2000 rpm;
S20, sequentially adding base oil and polyisobutylene, dispersing for 30-50 min under the conditions of not higher than 50 ℃ and 200-600 rpm, and filtering;
s30, adding polyamide-imide and a benzocyclobutene polyester adhesive, dispersing for 30-50 min at a temperature of not higher than 50 ℃ and at a speed of 200-600 rpm, and filtering to obtain the engine protective coating liquid.
Further, when the engine protection coating liquid further includes boron nitride, nano molybdenum disulfide, nano graphite, and nano nickel powder, step S10 includes:
s101, adding boron nitride, nano molybdenum disulfide, nano graphite and nano nickel powder into polytetrafluoroethylene, and performing ultrasonic dispersion to form a dispersion solution;
s102, adding the dispersion solution into a dispersing agent, and dispersing for 25-45 min under the conditions of not higher than 50 ℃ and 1000-2000 rpm.
Further, when the engine protective coating liquid further includes triethanolamine, the triethanolamine is added in the above step S30.
The technical solutions of the present invention are further described in detail with reference to the following specific examples, which should be understood as merely illustrative and not limitative.
Example 1
The engine protective coating liquid comprises the following components: 60 parts of base oil, 10 parts of polytetrafluoroethylene, 2.5 parts of polyamide-imide, 5 parts of a benzene butylene polyester adhesive, 12 parts of polyisobutylene and 20 parts of a dispersing agent. Wherein the base oil is 100N lubricating oil base oil; the particle size of the polytetrafluoroethylene is 0.2-0.4 mu m; the dispersing agent is perfluoro surfactant FC-400.
The preparation method comprises the following steps:
s10, adding polytetrafluoroethylene into the dispersing agent, and dispersing for 30min under the conditions of temperature not higher than 50 ℃ and 1200 rpm;
s20, sequentially adding base oil and polyisobutylene, dispersing for 45min at the temperature of not higher than 50 ℃ and at 400rpm, and filtering;
s30, adding polyamide-imide and a polybutylene terephthalate adhesive, dispersing for 45min at the temperature of not higher than 50 ℃ and at the speed of 400rpm, and filtering to obtain the engine protective coating liquid.
Example 2
Except for the formula of the engine protective coating liquid, the formula is changed into 20 parts of base oil, 4 parts of polytetrafluoroethylene, 1 part of polyamide-imide, 3 parts of benzene butylene polyester adhesive, 8 parts of polyisobutylene and 10 parts of dispersing agent. Wherein the base oil is 100N lubricating oil base oil; the particle size of the polytetrafluoroethylene is 0.2-0.4 mu m; the dispersant was the same as in example 1 except that it was a perfluoro surfactant FC-400 ".
Example 3
Except for the formula of the engine protective coating liquid, the formula is changed into 70 parts of base oil, 15 parts of polytetrafluoroethylene, 5 parts of polyamide-imide, 4 parts of benzene butylene polyester adhesive, 20 parts of polyisobutylene and 30 parts of dispersing agent. Wherein the base oil is 100N lubricating oil base oil; the particle size of the polytetrafluoroethylene is 0.2-0.4 mu m; the dispersant was the same as in example 1 except that it was a perfluoro surfactant FC-400 ".
Example 4
The formula of the coating liquid except the engine protection coating liquid is changed into 50 parts of base oil, 8 parts of polytetrafluoroethylene, 2 parts of polyamide-imide, 3 parts of a benzene butylene polyester adhesive, 15 parts of polyisobutylene and 12 parts of a dispersing agent. Wherein the base oil is 150N lubricating oil base oil; the particle size of the polytetrafluoroethylene is 0.2-0.4 mu m; the dispersant was the same as in example 1 except that it was a perfluoro surfactant FC-400 ".
Example 5
Except for the formula of the engine protective coating liquid, the formula is changed into 65 parts of base oil, 12 parts of polytetrafluoroethylene, 3 parts of polyamide-imide, 5 parts of benzene butylene polyester adhesive, 10 parts of polyisobutylene and 25 parts of dispersing agent. Wherein the base oil is 150N lubricating oil base oil; the particle size of the polytetrafluoroethylene is 0.2-0.4 mu m; the dispersant was the same as in example 1 except that it was a perfluoro surfactant FC-400 ".
Example 6
The formula of the engine protective coating liquid comprises 60 parts of base oil, 10 parts of polytetrafluoroethylene, 2.5 parts of polyamide-imide, 5 parts of benzene butylene polyester adhesive, 12 parts of polyisobutylene, 20 parts of dispersant, 0.8 part of boron nitride, 0.8 part of nano molybdenum disulfide, 1 part of nano graphite and 1 part of nano nickel powder. Wherein the base oil is 100N lubricating oil base oil; the particle size of the polytetrafluoroethylene is 0.2-0.4 mu m; the dispersing agent is perfluoro surfactant FC-400; the particle sizes of the nano molybdenum disulfide, the nano graphite and the nano nickel powder are all 5-50 nm.
The preparation method comprises the following steps:
s101, adding boron nitride, nano molybdenum disulfide, nano graphite and nano nickel powder into polytetrafluoroethylene, and dispersing by ultrasonic waves to form a dispersion solution;
s102, adding the dispersion solution into a dispersing agent, and dispersing for 30min under the conditions of not higher than 50 ℃ and 1200 rpm;
s20, sequentially adding base oil and polyisobutylene, dispersing for 45min at the temperature of not higher than 50 ℃ and at 400rpm, and filtering;
s30, adding polyamide-imide and a polybutylene terephthalate adhesive, dispersing for 45min at the temperature of not higher than 50 ℃ and at the speed of 400rpm, and filtering to obtain the engine protective coating liquid.
Example 7
The formula of the coating liquid except the engine protection is changed into 60 parts of base oil, 10 parts of polytetrafluoroethylene, 2.5 parts of polyamide-imide, 5 parts of benzene butylene polyester adhesive, 12 parts of polyisobutylene, 20 parts of dispersant, 2 parts of boron nitride, 2 parts of nano molybdenum disulfide, 0.2 part of nano graphite and 0.2 part of nano nickel powder. Wherein the base oil is 100N lubricating oil base oil; the particle size of the polytetrafluoroethylene is 0.2-0.4 mu m; the dispersing agent is perfluoro surfactant FC-400; the particle sizes of the nano molybdenum disulfide, the nano graphite and the nano nickel powder are all 5-50 nm, and the rest are the same as those in the embodiment 6.
Example 8
The formula of the solution except the engine protective coating is changed into 60 parts of base oil, 10 parts of polytetrafluoroethylene, 2.5 parts of polyamide-imide, 5 parts of a phenylbutene polyester adhesive, 12 parts of polyisobutylene, 20 parts of a dispersing agent, 1 part of boron nitride, 1.6 parts of nano molybdenum disulfide, 0.5 part of nano graphite and 0.3 part of nano nickel powder. Wherein the base oil is 100N lubricating oil base oil; the particle size of the polytetrafluoroethylene is 0.2-0.4 mu m; the dispersing agent is a perfluorinated surfactant FC-400; the particle sizes of the nano molybdenum disulfide, the nano graphite and the nano nickel powder are 5-50 nm, and the rest are the same as those in the embodiment 6.
Example 9
The formula of the engine protective coating liquid comprises 60 parts of base oil, 10 parts of polytetrafluoroethylene, 2.5 parts of polyamide-imide, 5 parts of benzocyclobutene polyester adhesive, 12 parts of polyisobutylene, 20 parts of dispersant, 0.8 part of boron nitride, 0.8 part of nano molybdenum disulfide, 1 part of nano graphite, 1 part of nano nickel powder and 14 parts of triethanolamine. Wherein the base oil is 100N lubricating oil base oil; the particle size of the polytetrafluoroethylene is 0.2-0.4 mu m; the dispersing agent is perfluoro surfactant FC-400; the particle sizes of the nano molybdenum disulfide, the nano graphite and the nano nickel powder are all 5-50 nm.
The preparation method comprises the following steps:
s101, adding boron nitride, nano molybdenum disulfide, nano graphite and nano nickel powder into polytetrafluoroethylene, and performing ultrasonic dispersion to form a dispersion solution;
s102, adding the dispersion solution into a dispersing agent, and dispersing for 30min under the conditions of temperature not higher than 50 ℃ and 1200 rpm;
s20, sequentially adding base oil and polyisobutylene, dispersing for 45min at the temperature of not higher than 50 ℃ and at 400rpm, and filtering;
s30, adding polyamide-imide, triethanolamine and a polybutylene terephthalate adhesive, dispersing for 45min at the temperature of not higher than 50 ℃ and at the speed of 400rpm, and filtering to obtain the engine protective coating liquid.
Example 10
The formulation of the engine protective coating liquid of this example was the same as that of example 1.
The preparation method comprises the following steps:
s10, adding polytetrafluoroethylene into the dispersing agent, and dispersing for 25min under the conditions of not higher than 50 ℃ and 1000 rpm;
s20, sequentially adding the base oil and the polyisobutene, dispersing for 30min at the temperature of not higher than 50 ℃ and at 200rpm, and filtering;
s30, adding polyamide-imide and a polyester adhesive of benzene butylene, dispersing for 30min at the temperature of not higher than 50 ℃ and at the speed of 200rpm, and filtering to obtain the engine protective coating liquid.
Example 11
The formulation of the engine protective coating liquid of this example was the same as that of example 1.
The preparation method comprises the following steps:
s10, adding polytetrafluoroethylene into the dispersing agent, and dispersing for 45min under the conditions of not higher than 50 ℃ and 2000 rpm;
s20, sequentially adding base oil and polyisobutene, dispersing for 50min at the temperature of not higher than 50 ℃ and at 600rpm, and filtering;
s30, adding polyamide-imide and a polyester adhesive of benzene butylene, dispersing for 50min at the temperature of not higher than 50 ℃ and at the speed of 600rpm, and filtering to obtain the engine protective coating liquid.
Comparative example 1
The procedure was as in example 1 except that the polyamide-imide was used in the absence of the component (D).
Comparative example 2
The procedure of example 1 was repeated except that the dispersant was replaced with polyisopropylene diimide as compared with example 1.
Performance testing
The engine protective coating liquids provided in the above examples and comparative examples were added to a commercially available lubricating oil at an amount of 15% by weight of the lubricating oil and tested as follows:
1. according to the standard GB/T12583, the sintering load, the grinding spot diameter and the friction coefficient are measured, and the results are recorded in the table 1;
2. the lubricating oil is added into 13 vehicles which have traveled 5000 kilometers and have the same model, the oil consumption reduction value is detected after the vehicles travel 2000 kilometers, and the result is recorded into table 1.
TABLE 1 measurement of Properties
As can be seen from table 1, compared with comparative examples 1 and 2, the lubricating oil added with the engine protective coating liquid of each example has smaller wear-scar diameter, friction coefficient and oil consumption, and larger sintering load, that is, the engine protective coating liquid of the present invention helps to reduce wear, has better repairing effect, reduces friction coefficient, and has better wear resistance; in addition, under the same mileage, the oil consumption of the embodiment is smaller, which shows that the repairing effect maintenance of the engine protection coating liquid is better.
The above is only a preferred embodiment of the present invention, and it is not intended to limit the scope of the invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall be included in the scope of the present invention.
Claims (6)
1. The engine protective coating liquid is characterized by comprising the following components in parts by weight: 20-70 parts of base oil, 4-15 parts of polytetrafluoroethylene, 1-5 parts of polyamide-imide, 3-5 parts of a benzocyclobutene polyester adhesive, 8-20 parts of polyisobutylene and 10-30 parts of a dispersing agent, wherein the particle size of the polytetrafluoroethylene is 0.2-0.4 mu m, and the dispersing agent is a perfluorinated surfactant FC-400;
The polytetrafluoroethylene also comprises boron nitride, nano molybdenum disulfide, nano graphite, nano nickel powder and triethanolamine, wherein 0.8-2 parts of boron nitride, 0.8-2 parts of nano molybdenum disulfide, 0.2-1 part of nano graphite and 0.2-1 part of nano nickel powder are correspondingly added into every 10 parts of polytetrafluoroethylene.
2. The engine protective coating fluid of claim 1, comprising the following components in parts by weight: 50-65 parts of base oil, 8-12 parts of polytetrafluoroethylene, 2-3 parts of polyamide-imide, 3-5 parts of a benzocyclobutene-based adhesive, 10-15 parts of polyisobutylene and 12-25 parts of a dispersing agent.
3. The engine protective coating fluid of claim 2, comprising the following components in parts by weight: 60 parts of base oil, 10 parts of polytetrafluoroethylene, 2.5 parts of polyamide-imide, 5 parts of a benzene butylene polyester adhesive, 12 parts of polyisobutylene and 20 parts of a dispersing agent.
4. The engine protection coating fluid of claim 1, wherein the base oil is a 100N lube base oil or a 150N lube base oil.
5. The engine protective coating liquid according to claim 1, wherein the particle sizes of the nano molybdenum disulfide, the nano graphite and the nano nickel powder are all 5 to 50 nm.
6. A method for preparing the engine protective coating liquid according to any one of claims 1 to 5, characterized by comprising the steps of:
s101, adding boron nitride, nano molybdenum disulfide, nano graphite and nano nickel powder into polytetrafluoroethylene, and dispersing by ultrasonic waves to form a dispersion solution;
s102, adding the dispersion solution into a dispersing agent, and dispersing for 25-45 min under the conditions of not higher than 50 ℃ and 1000-2000 rpm;
s20, sequentially adding base oil and polyisobutylene, dispersing for 30-50 min under the conditions of not higher than 50 ℃ and 200-600 rpm, and filtering;
s30, adding polyamide-imide and a benzocyclobutene polyester adhesive, dispersing for 30-50 min at the temperature of not higher than 50 ℃ and at the speed of 200-600 rpm, and filtering to obtain the engine protective coating liquid.
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| CN102816518A (en) * | 2012-09-06 | 2012-12-12 | 山东滨州渤海活塞股份有限公司 | Carbon-carbon composite nano-base wear-resistant coating material |
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| CN105567383A (en) * | 2016-01-07 | 2016-05-11 | 巩俭 | Protective coating liquid of engine |
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