CN110804389A - Room temperature vulcanized silicone rubber coating resistant to strong ultraviolet radiation and preparation method thereof - Google Patents
Room temperature vulcanized silicone rubber coating resistant to strong ultraviolet radiation and preparation method thereof Download PDFInfo
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/004—Reflecting paints; Signal paints
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
75-85 parts of hydroxyl-terminated polydimethylsiloxane, 15-35 parts of hydroxyl-terminated polydimethylsiloxane, 20-30 parts of fumed silica, 20-40 parts of aluminum hydroxide micropowder, 3-10 parts of nano titanium dioxide, 3-6 parts of benzophenone, 3-5 parts of nano zinc oxide, 2-5 parts of iron oxide red, 4-8 parts of methyl silicone oil, 4-6 parts of methyl tributyl ketoxime silane, 4-6 parts of vinyl tributyl ketoxime silane, 2-4 parts of a composite coupling agent, 1 part of dibutyltin dilaurate, 50-70 parts of tetrachloroethane, 30-50 parts of dichloromethane and the like. The invention can reflect and absorb ultraviolet rays, has extremely strong ultraviolet radiation resistance, can be applied to insulators made of glass, ceramics, hard polymers and the like in high-altitude areas, can greatly improve the pollution-resistant lightning voltage of the insulators, and ensures the operation safety of a power system.
Description
Technical Field
The invention belongs to the technical field of chemical materials, and particularly relates to a long-acting anti-pollution flashover coating for insulators such as glass, ceramics and polymers in the power industry.
Background
The anti-pollution flashover of the external insulation equipment of the power system is an important technology related to the safe operation of the equipment of the power system. The outer insulating surface of the power transmission and transformation equipment can not avoid various pollutants such as smoke dust, dust and the like falling into the atmosphere, and in areas with more serious atmospheric pollution, the pollution accumulation of the insulator is more serious, so that pollution flashover discharge is more easily caused. The room temperature vulcanized silicone rubber coating is an anti-pollution flashover coating commonly used on power equipment, and is usually coated on glass, ceramic and polymer insulators without hydrophobicity and hydrophobic migration, so that the pollution flashover and wet lightning voltage of the insulators are improved, and the normal operation of a circuit is guaranteed.
With the large-scale construction of western power grids and extra-high voltage engineering, a large number of insulators are needed, the insulator has the climatic characteristics of high altitude, thin air and strong wind weather in northwest regions, the composite insulator made of the silicon rubber material is not resistant to bird pecking, the umbrella skirt is easy to fatigue fracture along with strong wind waving, and the glass, ceramic and polymer insulators have excellent hydrophobicity and hydrophobic mobility while keeping the original electrical and mechanical properties after being coated with the silicon rubber coating, so that the operation safety of lines is greatly improved. However, the traditional silicone rubber coating has poor weather resistance, short service life, easy aging and cracking, frequent recoating, large workload and high labor cost. Therefore, the problem to be solved urgently is to improve the strong ultraviolet ray resistance of the room temperature vulcanized silicone rubber.
Disclosure of Invention
The invention aims to provide a room temperature vulcanized silicone rubber coating resistant to strong ultraviolet radiation, which can reflect and absorb ultraviolet rays, has a strong function of resisting the strong ultraviolet radiation, is applied to the surfaces of glass, ceramic and polymer insulators in high-altitude areas, can improve the pollution flashover voltage of the insulators, reduces the maintenance cost and ensures the safe operation of a power system.
The invention also aims to provide a preparation method of the room temperature vulcanized silicone rubber coating resistant to the strong ultraviolet radiation.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an ambient temperature vulcanized silicone rubber coating resistant to strong ultraviolet radiation comprises the following components: hydroxyl-terminated polydimethylsiloxane I, hydroxyl-terminated polydimethylsiloxane II, fumed silica, aluminum hydroxide micro powder, nano titanium dioxide, benzophenone, nano zinc oxide, iron oxide red, methyl silicone oil, methyl tributyl ketoxime silane, vinyl tributyl ketoxime silane, a composite coupling agent, dibutyltin dilaurate, tetrachloroethane, dichloromethane, 1, 2-trichloroethane and cyclohexane.
The invention comprises the following components in parts by weight: 75-85 parts of hydroxyl-terminated polydimethylsiloxane, 15-35 parts of hydroxyl-terminated polydimethylsiloxane, 20-30 parts of fumed silica, 20-40 parts of aluminum hydroxide micro powder, 3-10 parts of nano titanium dioxide, 3-6 parts of benzophenone, 3-5 parts of nano zinc oxide, 2-5 parts of iron oxide red, 4-8 parts of methyl silicone oil, 4-6 parts of methyl tributyl ketoxime silane, 4-6 parts of vinyl tributoxy ketoxime silane, 2-4 parts of a composite coupling agent, 1-3 parts of dibutyltin dilaurate, 50-70 parts of tetrachloroethane, 30-50 parts of dichloromethane, 60-80 parts of 1, 2-trichloroethane and 5-10 parts of cyclohexane.
The components of the invention have the following preferred parts by weight: 75-80 parts of first hydroxyl-terminated polydimethylsiloxane, 20-25 parts of second hydroxyl-terminated polydimethylsiloxane, 22-25 parts of fumed silica, 25-30 parts of aluminum hydroxide micro powder, 4-6 parts of nano titanium dioxide, 4-5 parts of benzophenone, 3-5 parts of nano zinc oxide, 3-4 parts of iron oxide red, 5-6 parts of methyl silicone oil, 5-6 parts of methyl tributyl ketoxime silane, 4-5 parts of vinyl tributoxy ketoxime silane, 2-3 parts of a composite coupling agent, 1 part of dibutyltin dilaurate, 60-70 parts of tetrachloroethane, 30-40 parts of dichloromethane, 70-80 parts of 1, 1 and 2-trichloroethane and 8-10 parts of cyclohexane.
The rotational viscosity of the hydroxyl-terminated polydimethylsiloxane I is 1.8-2.5 ten thousand mm2/s。
The rotational viscosity of the hydroxyl-terminated polydimethylsiloxane II is 4-6 km2/s。
The surface of the fumed silica is treated by polydimethylsiloxane, and the specific surface area is 150-200 m2/g。
The particle size of the aluminum hydroxide micro powder is 1.3-2.5 microns, and the particle size distribution D50 is 1.7 microns.
The particle size of the nano titanium dioxide is 40-120 nm.
The nano zinc oxide has a particle size of 120-300 nm.
The composite coupling agent is a compound of N- (β -aminoethyl) -gamma-aminopropyltrimethoxysilane and gamma- (2.3-epoxypropoxy) propyltrimethoxysilane in a ratio of 1: 1-1: 2.
The preparation method of the room temperature vulcanized silicone rubber coating resistant to the strong ultraviolet radiation is characterized by comprising the following steps: mixing the hydroxyl-terminated polydimethylsiloxane I, the hydroxyl-terminated polydimethylsiloxane II, the fumed silica, the aluminum hydroxide micropowder, the nano titanium dioxide, the benzophenone, the nano zinc oxide and the iron oxide red for 1-2 hours at 120 ℃, vacuumizing for 1 hour, and grinding in a three-roll grinder until the slurry is fine and bright;
or mixing for 1 hour at 110 ℃, then mixing for 1 hour at 140 ℃, vacuumizing simultaneously during mixing at 140 ℃, and grinding in a three-roll grinder after mixing until the slurry is fine and bright;
then adding tetrachloroethane, dichloromethane, 1, 2-trichloroethane and cyclohexane solvent in sequence, dispersing for 30 +/-5 minutes by using a dispersion machine at the rotating speed of 1250 +/-200 r/m, then adding methyl silicone oil, methyl tributyrinoxime silane and vinyl tributyrinoxime silane, and dispersing for 15 +/-5 minutes; and finally, adding the composite coupling agent and dibutyltin dilaurate, emulsifying for 2-5 minutes, stopping emulsifying after the temperature reaches 40-50 ℃, filtering by a 200-mesh screen and canning.
The nano titanium dioxide has the functions of reflecting and absorbing ultraviolet rays and is used as an ultraviolet shielding layer in the coating. The benzene ring structure in benzophenone has a radiation protection function, and the n-type bond can transfer absorbed energy between molecules or within molecules, so that the bond breakage is avoided. And the hydroxyl-terminated polydimethylsiloxane I and the hydroxyl-terminated polydimethylsiloxane II are used as basic glue of the coating, are formed by crosslinking and provide hydrophobicity and hydrophobic migration. The fumed silica is a reinforcing agent, the aluminum hydroxide micropowder is a flame retardant, the iron oxide red is a heat stabilizer and a coloring agent, and the nano zinc oxide and the methyl silicone oil are auxiliaries. Methyl tributyrinoxime silane and vinyl tributyrinoxime silane are used as curing agents, dibutyltin dilaurate is used as a catalyst, and tetrachloroethane, dichloromethane, 1, 2-trichloroethane and cyclohexane are used as solvents of the coating.
The nanometer titanium dioxide has the functions of reflecting and absorbing ultraviolet rays, and the benzene ring structure in the benzophenone has the radiation protection function, so that the nanometer titanium dioxide has the extremely strong ultraviolet radiation resistance function.
The tetrachloroethane, the dichloromethane, the 1, 2-trichloroethane and the cyclohexane in the invention can keep high dispersion degree of the coating through synergistic action, are not easy to generate precipitation and gelation phenomena, and are stable to store. The coating has the characteristics of good leveling property, high glossiness, high self-cleaning property and capability of forming a micro-protrusion structure on the surface of the coating due to the difference of volatilization speeds of different solvents during construction and spraying.
The invention has the beneficial effects that: the invention has the functions of reflecting and absorbing ultraviolet rays, has extremely strong ultraviolet radiation resistance and radiation protection function, can greatly improve pollution flashover voltage and has continuous and long-acting pollution flashover resistance effect when being applied to insulators made of glass, ceramics, hard polymers and the like in high-altitude areas, reduces the operation and maintenance cost and ensures the safety of an electric power system.
Detailed Description
Example 1
The invention provides a strong ultraviolet radiation resistant room temperature vulcanized silicone rubber coating which comprises, by mass, 80g of hydroxyl-terminated polydimethylsiloxane I (type RF 20000), 20g of hydroxyl-terminated polydimethylsiloxane II (type RF 5000), 20g of fumed silica TS-72025 g, 30g of aluminum hydroxide micro powder (particle size 1.6-2.3 mu m), 10g of nano titanium dioxide (particle size 40-120 nm), 5g of benzophenone, 3g of nano zinc oxide (particle size 120-300 nm), 5g of iron oxide red, 6g of methyl silicone oil, 6g of methyl tributyrinoxime silane, 4g of vinyl tributyrinoxime silane, 4g of a composite coupling agent, 1g of dibutyltin dilaurate, 70g of tetrachloroethane, 50g of dichloromethane, 60g of 1, 2-trichloroethane and 8g of cyclohexane, wherein the composite coupling agent is a compound of N- (β -aminoethyl) -gamma-aminopropyltrimethoxysilane and gamma- (2.3-glycidoxy) propyltrimethoxysilane, wherein the weight ratio of the composite coupling agent is 1: 1.
The following components RF20000, RF5000, TS-720, aluminum hydroxide micropowder, nano titanium dioxide, benzophenone, nano zinc oxide and iron oxide red are mixed for 2 hours at 120 ℃, vacuumized for 1 hour and then ground in a three-roll grinder until the slurry is fine and bright. Then adding tetrachloroethane, dichloromethane, 1, 2-trichloroethane and cyclohexane solvent in sequence, dispersing for 30 minutes at the rotating speed of 1250r/m, then adding methyl silicone oil, methyl tributyl ketoxime silane and vinyl tributyroxime silane, and dispersing for 15 minutes. And finally, adding the composite coupling agent and dibutyltin dilaurate, emulsifying for 5 minutes, stopping emulsifying after the temperature reaches 40-50 ℃, filtering by a 200-mesh screen and canning.
An ultraviolet radiation test is carried out by adopting an UV-B ultraviolet lamp tube as a light source, the distance between the surface of a sample and the plane of the light source is 50mm, the test cycle time system is 4h of ultraviolet light (50 +/-5) DEG C exposure, 4h of non-radiation (50 +/-5) DEG C condensation exposure, and the total test time is 3000 h. Sampling and carrying out performance detection, wherein the tensile strength is 4.2MPa, the tear strength is 9.1kN/mm, the shear strength is 3.2MPa, the hydrophobicity is HC1 grade, the hydrophobic mobility is 28h, the adhesion is 1 grade, and the power frequency breakdown strength is 19.2 kV/mm.
Example 2
The invention provides a strong ultraviolet radiation resistant room temperature vulcanized silicone rubber coating which comprises the following components and mass thereof, wherein the components comprise 60g of hydroxyl-terminated polydimethylsiloxane I (model RF 20000), 60g of hydroxyl-terminated polydimethylsiloxane II (model RF 500040 g, fumed silica TS-72040 g, 35g of aluminum hydroxide micro powder (particle size is 1.6-2.3 mu m), 10g of nano titanium dioxide (particle size is 40-120 nm), 8g of benzophenone, 5g of nano zinc oxide (particle size is 120-300 nm), 5g of iron oxide red, 6g of methyl silicone oil, 6g of methyl tributyrinoxime silane, 4g of vinyl tributyrinoxime silane, 4g of composite coupling agent, 1g of dibutyltin dilaurate, 70g of tetrachloroethane, 50g of dichloromethane, 60g of 1, 2-trichloroethane and 8g of cyclohexane, and the composite coupling agent is a compound of N- (β -aminoethyl) -gamma-aminopropyltrimethoxysilane and gamma- (2.3-glycidyloxy) propyltrimethoxysilane, wherein the weight ratio of the composite coupling agent is 1: 2.
The following components RF20000, RF5000, TS-720, aluminum hydroxide micropowder, nano titanium dioxide, benzophenone, nano zinc oxide and iron oxide red are mixed for 1 hour at 120 ℃, vacuumized for 1 hour and then ground in a three-roll grinder until the slurry is fine and bright. Then adding tetrachloroethane, dichloromethane, 1, 2-trichloroethane and cyclohexane solvent in sequence, dispersing for 30 minutes at the rotating speed of 1250r/m, then adding methyl silicone oil, methyl tributyl ketoxime silane and vinyl tributyroxime silane, and dispersing for 15 minutes. And finally, adding the composite coupling agent and dibutyltin dilaurate, emulsifying for 5 minutes, stopping emulsifying after the temperature reaches 40-50 ℃, filtering by a 200-mesh screen and canning.
An ultraviolet radiation test is carried out by adopting an UV-B ultraviolet lamp tube as a light source, the distance between the surface of a sample and the plane of the light source is 50mm, the test cycle time system is 4h of ultraviolet light (50 +/-5) DEG C exposure, 4h of non-radiation (50 +/-5) DEG C condensation exposure, and the total test time is 3000 h. Sampling and carrying out performance detection, wherein the tensile strength is 4.8MPa, the tear strength is 8.4kN/mm, the shear strength is 3.6MPa, the hydrophobicity is HC1 grade, the hydrophobic mobility is 22h, the adhesion is 1 grade, and the power frequency breakdown strength is 20.4 kV/mm.
Example 3
The invention provides a strong ultraviolet radiation resistant room temperature vulcanized silicone rubber coating which comprises the following components and mass thereof, wherein 85g of hydroxyl-terminated polydimethylsiloxane I (model RF 20000), 85g of hydroxyl-terminated polydimethylsiloxane II (model RF 500015 g, TS-72035 g of fumed silica, 30g of aluminum hydroxide micro powder (particle size of 1.6-2.3 mu m), 10g of nano titanium dioxide (particle size of 40-120 nm), 6g of benzophenone, 5g of nano zinc oxide (particle size of 120-300 nm), 5g of iron oxide red, 6g of methyl silicone oil, 6g of methyl tributyrinoxime silane, 4g of vinyl tributyrinoxime silane, 4g of composite coupling agent, 1g of dibutyltin dilaurate, 70g of tetrachloroethane, 50g of dichloromethane, 60g of 1, 2-trichloroethane and 8g of cyclohexane, and the composite coupling agent is a compound of N- (β -aminoethyl) -gamma-aminopropyltrimethoxysilane and gamma- (2.3-glycidoxy) propyltrimethoxysilane, wherein the weight ratio of the composite coupling agent is 1: 1.
The following components RF20000, RF5000, TS-720, aluminum hydroxide micropowder, nano titanium dioxide, benzophenone, nano zinc oxide and iron oxide red are mixed for 1 hour at 110 ℃, then mixed for 1 hour at 140 ℃, vacuumized simultaneously when mixed for 140 ℃, and ground in a three-roll grinder after mixed until the slurry is fine and bright. Then adding tetrachloroethane, dichloromethane, 1, 2-trichloroethane and cyclohexane solvent in sequence, dispersing for 30 minutes at the rotating speed of 1250r/m, then adding methyl silicone oil, methyl tributyl ketoxime silane and vinyl tributyroxime silane, and dispersing for 15 minutes. And finally, adding the composite coupling agent and dibutyltin dilaurate, emulsifying for 5 minutes, stopping emulsifying after the temperature reaches 40-50 ℃, filtering by a 200-mesh screen and canning.
An ultraviolet radiation test is carried out by adopting an UV-B ultraviolet lamp tube as a light source, the distance between the surface of a sample and the plane of the light source is 50mm, the test cycle time system is 4h of ultraviolet light (50 +/-5) DEG C exposure, 4h of non-radiation (50 +/-5) DEG C condensation exposure, and the total test time is 3000 h. Sampling and carrying out performance detection, wherein the tensile strength is 5.2MPa, the tear strength is 10.5kN/mm, the shear strength is 3.8MPa, the hydrophobicity is HC1 grade, the hydrophobic mobility is 26h, the adhesion is 1 grade, and the power frequency breakdown strength is 20.1 kV/mm.
Test results show that the room temperature vulcanized silicone rubber coating prepared by the invention meets the use requirements and simultaneously improves the strong ultraviolet resistance, and is suitable for spraying glass, ceramics, polymer insulators and other electrical equipment needing pollution flashover voltage improvement in high-altitude areas.
The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the above embodiments describe the present invention in detail, those skilled in the art should understand that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and any modifications and equivalents may fall within the scope of the claims.
Claims (10)
1. The room temperature vulcanized silicone rubber coating resistant to strong ultraviolet radiation is characterized by comprising the following components in parts by weight: 75-85 parts of hydroxyl-terminated polydimethylsiloxane, 15-35 parts of hydroxyl-terminated polydimethylsiloxane, 20-30 parts of fumed silica, 20-40 parts of aluminum hydroxide micro powder, 3-10 parts of nano titanium dioxide, 3-6 parts of benzophenone, 3-5 parts of nano zinc oxide, 2-5 parts of iron oxide red, 4-8 parts of methyl silicone oil, 4-6 parts of methyl tributyl ketoxime silane, 4-6 parts of vinyl tributoxy ketoxime silane, 2-4 parts of a composite coupling agent, 1-3 parts of dibutyltin dilaurate, 50-70 parts of tetrachloroethane, 30-50 parts of dichloromethane, 60-80 parts of 1, 2-trichloroethane and 5-10 parts of cyclohexane.
2. An intense ultraviolet radiation resistant room temperature vulcanizing silicone rubber coating as claimed in claim 1, wherein: the weight parts of the components are as follows: 75-80 parts of first hydroxyl-terminated polydimethylsiloxane, 20-25 parts of second hydroxyl-terminated polydimethylsiloxane, 22-25 parts of fumed silica, 25-30 parts of aluminum hydroxide micro powder, 4-6 parts of nano titanium dioxide, 4-5 parts of benzophenone, 3-5 parts of nano zinc oxide, 3-4 parts of iron oxide red, 5-6 parts of methyl silicone oil, 5-6 parts of methyl tributyl ketoxime silane, 4-5 parts of vinyl tributoxy ketoxime silane, 2-3 parts of a composite coupling agent, 1 part of dibutyltin dilaurate, 60-70 parts of tetrachloroethane, 30-40 parts of dichloromethane, 70-80 parts of 1, 1 and 2-trichloroethane and 8-10 parts of cyclohexane.
3. The room temperature vulcanizing silicone rubber coating resistant to strong ultraviolet radiation of claim 1, wherein the rotational viscosity of the hydroxyl-terminated polydimethylsiloxane one is 1.8 to 2.5 ten thousand mm2/s。
4. The room temperature vulcanized silicone rubber coating resistant to intense ultraviolet radiation as claimed in claim 1, wherein the rotational viscosity of said hydroxyl-terminated polydimethylsiloxane bis (4-6 km/m)2/s。
5. The room temperature vulcanized silicone rubber coating resistant to strong ultraviolet radiation of claim 1, wherein the surface of fumed silica is treated by polydimethylsiloxane, and the specific surface area is 150-200 m2/g。
6. The room temperature vulcanized silicone rubber coating resistant to intense ultraviolet radiation of claim 1, wherein the particle size of the aluminum hydroxide micropowder is 1.3-2.5 microns, and the particle size distribution D50 is 1.7 microns.
7. The room temperature vulcanized silicone rubber coating resistant to intense ultraviolet radiation of claim 1, wherein the particle size of the nano titanium dioxide is 40-120 nm.
8. The room temperature vulcanized silicone rubber coating resistant to intense ultraviolet radiation of claim 1, wherein the nano zinc oxide has a particle size of 120-300 nm.
9. The room temperature vulcanized silicone rubber coating resistant to strong ultraviolet radiation of claim 1, wherein the composite coupling agent is a compound of N- (β -aminoethyl) -gamma-aminopropyltrimethoxysilane and gamma- (2.3-glycidoxy) propyltrimethoxysilane in a ratio of 1: 1-1: 2.
10. A method for preparing an intense ultraviolet radiation resistant room temperature vulcanizing silicone rubber coating material as claimed in claim 1, characterized in that: mixing the hydroxyl-terminated polydimethylsiloxane I, the hydroxyl-terminated polydimethylsiloxane II, the fumed silica, the aluminum hydroxide micropowder, the nano titanium dioxide, the benzophenone, the nano zinc oxide and the iron oxide red for 1-2 hours at 120 ℃, vacuumizing for 1 hour, and grinding in a three-roll grinder until the slurry is fine and bright; or the hydroxyl-terminated polydimethylsiloxane I, the hydroxyl-terminated polydimethylsiloxane II, the fumed silica, the aluminum hydroxide micro powder, the nano titanium dioxide, the benzophenone, the nano zinc oxide and the iron oxide red are mixed for 1 hour at 110 ℃, then mixed for 1 hour at 140 ℃, vacuumized simultaneously when mixed for 140 ℃, and ground in a three-roll grinder after mixing is finished until the slurry is fine and bright;
then adding tetrachloroethane, dichloromethane, 1, 2-trichloroethane and cyclohexane solvent in sequence, dispersing for 30 +/-5 minutes by using a dispersion machine at the rotating speed of 1250 +/-200 r/m, then adding methyl silicone oil, methyl tributyrinoxime silane and vinyl tributyrinoxime silane, and dispersing for 15 +/-5 minutes; and finally, adding the composite coupling agent and dibutyltin dilaurate, emulsifying for 2-5 minutes, stopping emulsifying after the temperature reaches 40-50 ℃, filtering by a 200-mesh screen and canning.
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| CN115058191A (en) * | 2022-07-08 | 2022-09-16 | 广东电网有限责任公司 | Anti-aging coating and preparation method thereof |
| CN115340819A (en) * | 2022-09-02 | 2022-11-15 | 华北电力科学研究院有限责任公司 | Anti-pollution flashover coating for external insulation of power equipment and preparation method thereof |
| CN116515387A (en) * | 2022-10-12 | 2023-08-01 | 中国航发北京航空材料研究院 | Low-internal-stress high-weather-resistance wave-absorbing coating and preparation method thereof |
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| CN116515387A (en) * | 2022-10-12 | 2023-08-01 | 中国航发北京航空材料研究院 | Low-internal-stress high-weather-resistance wave-absorbing coating and preparation method thereof |
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