CN108610954B

CN108610954B - Production method of insulating self-spraying paint for power equipment

Info

Publication number: CN108610954B
Application number: CN201710067607.5A
Authority: CN
Inventors: 阙燕娣
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-02-08
Filing date: 2017-02-08
Publication date: 2020-11-03
Anticipated expiration: 2037-02-08
Also published as: CN108610954A

Abstract

The invention discloses a production method of insulating self-spraying paint for power equipment, which comprises the following steps: 1) drying; 2) kneading and mixing; 3) grinding and dispersing; 4) diluting and dispersing; 5) adding 2-6 parts by weight of cross-linking agent, 0.2-1.5 parts by weight of coupling agent and 0.1-1.0 part by weight of catalyst into the semi-finished paint obtained in the step 4), and uniformly stirring and mixing to obtain insulating paint with the viscosity of 25-50s coated in 4 cups; 6) subpackaging the insulating paint obtained in the step 5) to a self-sprinkling irrigation not provided with a liquid guiding pipe, and injecting 170 portions of propellant and 190 portions of propellant by weight under high pressure to obtain the finished insulating self-spraying paint. The insulating self-spraying paint produced by the production method has the characteristics of no blockage, no blockage and flexible and quick construction mode.

Description

Production method of insulating self-spraying paint for power equipment

Technical Field

The invention belongs to the technical field of coatings, and particularly relates to a production method of insulating paint for power equipment.

Background

The pollution flashover of power generation and transmission system equipment is a problem which puzzles the safe operation of power facilities for a long time, particularly the salt density reaches 0.25mg/cm when salt fog, industrial pollution, port and wharf dust and the like are mixed alternately at offshore places²From heavy fouling area d to very heavy fouling area e (IEC 60815). The external insulation of the power transformation equipment bears the complex pollution environment for a long time, so that the equipment has partial discharge, particularly the sleeve discharge is more violent, and arc light is partially discharged in time and night.

Almost every power grid, power plant and power consumer have some places to cause repeated flashover due to air pollution, thereby causing large-area power outage and production accidents, and causing huge economic loss and social influence. The dirty discharge mechanism of the system equipment insulator is as follows: the running insulator is influenced by various pollutants in the natural environment, and a layer of pollutants is gradually deposited on the surface of the insulator. When the insulator is in a dry state, the resistance of the pollution layer is large, the insulator with the pollutants on the surface keeps a high insulation level, and the discharge voltage is close to that in a clean and dry state. However, when the insulator is exposed to humid weather such as moisture, fog, dew, rain, ice melting, snow melting and the like, the dirt on the surface of the insulator absorbs moisture, so that electrolyte in the dirt layer is dissolved and ionized, the conductance of the dirt layer is increased, and the surface leakage current of the insulator is increased. In such a case, the insulator surface voltage is unevenly distributed, the local field strength is excessively high, and a local small arc (discharge sound) occurs across the area. Along with the increase of the wetting degree, the amplitude of leakage current is increased, the length of a local arc is increased (discharge sound is increased), when the length of the arc reaches or exceeds a critical state, the arc penetrates through two poles, and flashover occurs on the surface of the insulator;

in recent years, the silicon rubber insulating coating is widely applied to the power industry and the electronic industry, particularly has excellent insulating, high-voltage resistant, hydrophobic and aging resistant characteristics, plays an important role in the aspect of pollution flashover prevention of power transmission and transformation equipment, and becomes a preferred coating for protecting the power transmission and transformation equipment. The existing construction method of the silicon rubber insulating coating mainly adopts an air spraying process, but the air spraying process needs special technicians, and the general units for producing the silicon rubber insulating coating need to be equipped with construction teams to carry out the construction operation of the coating, so that not only is great labor cost increased for enterprises producing the coating, but also the use side of the coating cannot be used by self, and the comprehensive cost is high under the conditions of long road span and small spraying amount, and the acceptance of users is difficult, thereby causing the increase of the difficulty of business operation; meanwhile, the silicon rubber insulating paint generally needs to be filled with a large amount of filler to meet the standard requirements of the power industry, so that the viscosity of the silicon rubber insulating paint is high, and the silicon rubber insulating self-spraying paint is easy to block a nozzle and cannot be normally used due to the self characteristic, namely the characteristic of easy curing when meeting water vapor.

Disclosure of Invention

In view of the above, the present invention aims to provide a method for producing an insulating self-spraying paint for electrical equipment, wherein the insulating self-spraying paint produced by the method has the characteristics of no blockage, no blockage and flexible and quick construction mode.

In order to achieve the purpose, the invention provides the following technical scheme:

a method for producing an insulating self-painting paint for electrical equipment, comprising the steps of:

1) and respectively placing the nano white carbon black, the electric erosion resistant filler aluminum hydroxide, the decabromodiphenylethane, the magnesium stearate and the pigment in a blast oven with the temperature of 120-240 ℃ for baking for 3-4 hours to remove water, and cooling for later use.

2) Adding 80-120 parts by weight of hydroxyl-terminated polymethylphenylsiloxane, 2-8 parts by weight of polymethylphenylsiloxane, 8-15 parts by weight of nano white carbon black subjected to baking and moisture removal in the step 1), 5-15 parts by weight of aluminum hydroxide serving as an anti-electric erosion filler, 5-15 parts by weight of decabromodiphenylethane, 2-6 parts by weight of magnesium stearate and 2-5 parts by weight of pigment into a vacuum kneader in sequence for mixing, heating to 100 ℃ and 160 ℃ for mixing for 1.5-3 hours, removing low molecules in vacuum for 2-3 hours, and cooling to obtain a mixed rubber material;

3) transferring the mixed rubber material obtained in the step 2) to a three-roll machine for three-roll grinding until the fineness is below 30 mu m to obtain a grinding material;

4) adding 150-170 parts by weight of solvent into the grinding material obtained in the step 3) for dilution until the grinding material is uniformly dispersed to obtain a semi-finished coating;

5) adding 2-6 parts by weight of a cross-linking agent, 0.2-1.5 parts by weight of a coupling agent and 0.1-1.0 part by weight of a catalyst into the semi-finished paint obtained in the step 4), and uniformly stirring and mixing to obtain insulating paint;

6) subpackaging the insulating paint obtained in the step 5) into a self-spraying tank, and injecting 190 parts by weight of propellant 170-containing paint under high pressure to obtain a finished insulating self-spraying paint;

wherein the self-spraying tank is not provided with a liquid guiding pipe;

wherein the coating-4 cup viscosity of the insulating paint obtained in the step 5) is 25-50 s;

preferably, wherein the specific surface of the nano white carbon black is 150-380g/m²。

Preferably, wherein the particle size of the aluminum hydroxide is 0.5-30 μm, and the particle size of the decabromodiphenylethane is 40-60 μm.

Preferably, the kinematic viscosity of the hydroxyl-terminated polymethylphenylsiloxane is 4800-12000mpa.s, and the kinematic viscosity of the polymethylphenylsiloxane is 100-500 mpa.s.

Preferably, the cross-linking agent is one or more of ethyl orthosilicate, polyethyl silicate, methyl tributyroximosilane, tetrabutoximosilane, vinyl butyrate ketoximosilane and methyl triacetoxysilane.

Preferably, wherein the catalyst is one or more of dibutyltin dilaurate, dioctyltin dilaurate, tributyl titanate, tetrabutyl titanate, and tetraisobutyl titanate.

Preferably, the coupling agent is one or more of aminopropyltrimethoxysilane, vinyltrimethoxysilane, epoxypropyltrimethoxysilane and acryloxypropyltrimethoxysilane.

Preferably wherein the propellant is R-134 aT.

Preferably, the insulating paint also comprises 3-6 parts by weight of nano montmorillonite.

The invention has the beneficial effects that:

according to the production method of the insulating self-spraying paint for the power equipment, provided by the invention, through reasonable formula design, not only are various performance indexes of the insulating paint meet the related technical requirements of the insulating paint for the power industry, but also the paint-4 cup viscosity of the paint is within the range of 25-50s, and the paint with the viscosity can be conveniently sprayed out of a self-spraying tank without blocking a nozzle; the self-spraying tank without the liquid guiding pipe is adopted, so that the problem of blockage caused by gel solidification of the insulating paint in the liquid guiding pipe is solved; the invention ensures that the insulating self-spray paint can be normally used, and simultaneously avoids the problem that the insulating paint is easy to solidify gel when meeting water vapor to block the liquid guiding pipe, thereby realizing the use of the insulating self-spray paint on electric equipment, greatly reducing the cost expenditure of production and construction units, and simultaneously ensuring the safe operation of modern electric power industry because the flexible construction mode is greatly convenient for end use customers.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments.

When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or upper and lower limit of the preferred value, it is to be understood that any range where any pair of upper limit or preferred value and any lower limit or preferred value of the range is combined is specifically disclosed, regardless of whether the range is specifically disclosed. Unless otherwise indicated, numerical range values set forth herein are intended to include the endpoints of the range, and all integers and fractions within the range.

All percentages, parts, ratios, etc. herein are by weight unless otherwise indicated.

The materials, methods, and examples herein are illustrative and, unless otherwise specified, are not to be construed as limiting.

The invention is detailed as follows:

6) subpackaging the insulating paint obtained in the step 5) into a self-spraying tank, and injecting 190 parts by weight of propellant 170-containing materials under high pressure to obtain the finished insulating self-spraying paint.

Wherein, the self-blowing tank includes a jar body, control flap and nozzle, the upper end of the jar body sets up control flap, control flap's upper end is provided with the nozzle button, just the nozzle with control flap's valve rod intercommunication, the valve rod lower extreme does not set up the drainage pipe.

according to the production method for insulating self-spray paint for power equipment, the adopted hydroxyl-terminated polymethylphenylsiloxane, polymethylphenylsilicone oil, nano-silica, aluminum hydroxide, decabromodiphenylethane, magnesium stearate, pigment, nano-montmorillonite, cross-linking agent, coupling agent and catalyst are all commercially available or prepared by a conventional technical method in the field, wherein the pigment is titanium dioxide, iron red, phthalocyanine blue or phthalocyanine green.

Example 1:

1) and respectively placing the nano white carbon black, the electric erosion resistant filler aluminum hydroxide, the decabromodiphenylethane, the magnesium stearate and the pigment in a blast oven at 120 ℃ for baking for 4 hours to remove water, and cooling for later use.

2) Adding 15 parts by weight of nano white carbon black, 12 parts by weight of anti-electric erosion filler aluminum hydroxide, 10 parts by weight of decabromodiphenylethane, 6 parts by weight of magnesium stearate and 5 parts by weight of pigment which are baked and dehydrated in the step 1) into a vacuum kneader in sequence for mixing, heating to 100 ℃, mixing for 3 hours, removing low molecules in vacuum for 3 hours, and cooling to obtain a mixed rubber material;

3) transferring the mixed rubber material obtained in the step 2) to a three-roll machine for three-roll grinding until the fineness is 30 mu m, so as to obtain a grinding material;

4) adding 170 parts by weight of solvent into the grinding material obtained in the step 3) for dilution until the grinding material is uniformly dispersed, so as to obtain a semi-finished paint product;

5) adding 5 parts by weight of cross-linking agent, 0.5 part by weight of coupling agent and 0.5 part by weight of catalyst into the semi-finished paint obtained in the step 4), and stirring and mixing uniformly to obtain insulating paint with the viscosity of 27s coated in 4 cups;

6) subpackaging the insulating paint obtained in the step 5) into a self-sprinkling irrigation without a liquid guiding pipe, and pouring 175 parts by weight of R-134aT propellant into the self-sprinkling irrigation under high pressure to obtain a finished insulating self-spraying paint.

In this embodiment, the specific surface area of the nano white carbon black is 200g/m²(ii) a The aluminum hydroxide is prepared by mixing aluminum hydroxide with the particle size of 0.6 mu m and aluminum hydroxide with the particle size of 25 mu m according to the mass ratio of 1:2, and the decabromodiphenylethane is prepared by mixing decabromodiphenylethane with the particle size of 30 mu m and decabromodiphenylethane with the particle size of 60 mu m according to the mass ratio of 1: 3; the pigment is titanium dioxide; the hydroxyl-terminated polymethylphenyl siloxane is prepared by mixing hydroxyl-terminated polymethylphenyl siloxane with kinematic viscosity of 4800mpa.s with hydroxyl-terminated polymethylphenyl siloxane with kinematic viscosity of 12000mpa.s according to the mass ratio of 3: 1; the kinematic viscosity of the polymethylphenyl silicone oil is 100 mpa.s; the cross-linking agent is methyl tributyl ketoxime silane; the catalyst is dioctyltin dilaurate, and the coupling agent is aminopropyl trimethoxy silane.

Example 2:

1) and respectively placing the nano white carbon black, the electric erosion resistant filler aluminum hydroxide, the decabromodiphenylethane, the magnesium stearate and the pigment in a blast oven at 150 ℃ for baking for 3.8 hours to remove water, and cooling for later use.

2) Sequentially adding 100 parts by weight of hydroxyl-terminated polymethylphenylsiloxane, 4 parts by weight of polymethylphenylsiloxane, 12 parts by weight of nano white carbon black, 8 parts by weight of aluminum hydroxide serving as an anti-electric erosion filler, 12 parts by weight of decabromodiphenylethane, 3.5 parts by weight of magnesium stearate and 3 parts by weight of pigment which are baked and dehydrated in the step 1) into a vacuum kneader for mixing, heating to 120 ℃, mixing for 3 hours, removing low molecules in vacuum for 3 hours, and cooling to obtain a mixed rubber material;

4) adding 160 parts by weight of solvent into the grinding material obtained in the step 3) for dilution until the grinding material is uniformly dispersed, so as to obtain a semi-finished paint product;

5) adding 3.2 parts by weight of cross-linking agent, 0.8 part by weight of coupling agent and 0.5 part by weight of catalyst into the semi-finished paint obtained in the step 4), and stirring and mixing uniformly to obtain 4 cups of insulating paint with the viscosity of 34 s;

6) subpackaging the insulating paint obtained in the step 5) into a self-sprinkling irrigation without a liquid guiding pipe, and pouring 180 parts by weight of R-134aT propellant aT high pressure to obtain a finished insulating self-spraying paint.

In this embodiment, the specific surface area of the nano white carbon black is 300g/m²(ii) a The particle size of the aluminum hydroxide is 0.8 mu m, and the decabromodiphenyl ethane is formed by mixing decabromodiphenyl ethane with the particle size of 30 mu m and decabromodiphenyl ethane with the particle size of 60 mu m according to the mass ratio of 1: 3; the pigment is iron oxide red, the kinematic viscosity of the hydroxyl-terminated polymethylphenyl siloxane is 7500mpa.s, and the kinematic viscosity of the polymethylphenyl silicone oil is 300 mpa.s; the cross-linking agent is ethyl orthosilicate; the catalyst is dibutyltin dilaurate; the coupling agent is prepared by mixing aminopropyl trimethoxy silane and vinyl trimethoxy silane according to the mass ratio of 1: 1.

Example 3:

1) and respectively placing the nano white carbon black, the electric erosion resistant filler aluminum hydroxide, the decabromodiphenylethane, the magnesium stearate and the pigment in a blowing oven at 180 ℃ for baking for 3.5 hours to remove water, and cooling for later use.

2) Adding 115 parts by weight of hydroxyl-terminated polymethylphenylsiloxane, 3 parts by weight of polymethylphenylsiloxane, 8 parts by weight of nano white carbon black, 10 parts by weight of aluminum hydroxide serving as an anti-electric erosion filler, 5 parts by weight of decabromodiphenylethane, 6 parts by weight of magnesium stearate and 2 parts by weight of pigment which are baked and dehydrated in the step 1) into a vacuum kneader in sequence for mixing, heating to 120 ℃, mixing for 2.5 hours, removing low molecules in vacuum for 2 hours, and cooling to obtain a mixed rubber material;

3) transferring the mixed rubber material obtained in the step 2) to a three-roll machine for three-roll grinding until the fineness is 25 mu m, so as to obtain a grinding material;

4) adding 150 parts by weight of solvent into the grinding material obtained in the step 3) for dilution until the grinding material is uniformly dispersed, so as to obtain a semi-finished paint product;

5) adding 2 parts by weight of cross-linking agent, 1 part by weight of coupling agent and 0.5 part by weight of catalyst into the semi-finished paint obtained in the step 4), and uniformly stirring and mixing to obtain insulating paint with the viscosity of 48s in a coating-4 cup;

6) subpackaging the insulating paint obtained in the step 5) into a self-sprinkling irrigation machine without a liquid guiding pipe, and pouring 184.5 parts by weight of R-134aT propellant into the self-sprinkling irrigation machine aT high pressure to obtain a finished product of the insulating self-spraying paint.

In this embodiment, the specific surface area of the nano white carbon black is 380g/m²(ii) a The aluminum hydroxide is prepared by mixing 0.6 mu m aluminum hydroxide and 25 mu m aluminum hydroxide according to the mass ratio of 1: 2; the particle size of the decabromodiphenylethane is 60 mu m; the pigment is phthalocyanine blue; the hydroxyl-terminated polymethylphenyl siloxane is prepared by mixing the hydroxyl-terminated polymethylphenyl siloxane with the kinematic viscosity of 5400mpa.s and the hydroxyl-terminated polymethylphenyl siloxane with the kinematic viscosity of 10000mpa.s according to the mass ratio of 2: 1; the kinematic viscosity of the polymethylphenyl silicone oil is 350 mpa.s; the cross-linking agent is prepared by mixing ethyl orthosilicate, polyethyl silicate, methyl tributyl ketoxime silane and tetrabutoxime silane according to the mass ratio of 1:1:1: 1; the catalyst is prepared by mixing tributyl titanate and tetraisobutyl titanate according to the mass ratio of 1: 1; the coupling agent is acryloxypropyltrimethoxysilane;

example 4:

1) and respectively placing the nano white carbon black, the electric erosion resistant filler aluminum hydroxide, decabromodiphenylethane, magnesium stearate, nano montmorillonite and the pigment in a blast oven at 200 ℃ for 3 hours to remove water, and cooling for later use.

2) Adding 107 parts by weight of hydroxyl-terminated polymethylphenylsiloxane, 2 parts by weight of polymethylphenylsiloxane, 10 parts by weight of nano white carbon black, 5 parts by weight of aluminum hydroxide serving as an anti-electric erosion filler, 15 parts by weight of decabromodiphenylethane, 2 parts by weight of magnesium stearate, 2 parts by weight of pigment and 3 parts by weight of nano montmorillonite which are baked and dehydrated in the step 1) into a vacuum kneader in sequence for mixing, heating to 140 ℃ for mixing for 2.5 hours, removing low molecules in vacuum for 2 hours, and cooling to obtain a mixed rubber material;

3) transferring the mixed rubber material obtained in the step 2) to a three-roll machine for three-roll grinding until the fineness is below 25 mu m to obtain a grinding material;

4) adding 165 parts by weight of solvent into the grinding material obtained in the step 3) for dilution until the grinding material is uniformly dispersed, so as to obtain a semi-finished paint product;

5) adding 4 parts by weight of cross-linking agent, 1 part by weight of coupling agent and 1 part by weight of catalyst into the semi-finished paint obtained in the step 4), and uniformly stirring and mixing to obtain insulating paint with the paint-4 cup viscosity of 40 s;

6) subpackaging the insulating paint obtained in the step 5) into a self-sprinkling irrigation without a liquid guiding pipe, and pouring 170 parts by weight of R-134aT propellant into the self-sprinkling irrigation under high pressure to obtain a finished insulating self-spraying paint.

In this embodiment, the specific surface area of the nano white carbon black is 380g/m²(ii) a The particle size of the aluminum hydroxide is 20 micrometers, and the particle size of the decabromodiphenylethane is 50 micrometers; the pigment is phthalocyanine green; the kinematic viscosity of the hydroxyl-terminated polymethylphenyl siloxane is 8000mpa.s, and the kinematic viscosity of the polymethylphenyl silicone oil is 300 mpa.s; the cross-linking agent is methyl tributyl ketoxime silane; the catalyst is dibutyltin dilaurate; the coupling agent is aminopropyl trimethoxy silane.

Example 5:

1) and respectively placing the nano white carbon black, the electric erosion resistant filler aluminum hydroxide, decabromodiphenylethane, magnesium stearate, nano montmorillonite and the pigment in a blast oven at 240 ℃ for baking for 3 hours to remove water, and cooling for later use.

2) Adding 100 parts by weight of hydroxyl-terminated polymethylphenylsiloxane, 4 parts by weight of polymethylphenylsiloxane, 8 parts by weight of nano white carbon black, 10 parts by weight of aluminum hydroxide serving as an anti-electric erosion filler, 5 parts by weight of decabromodiphenylethane, 4 parts by weight of magnesium stearate, 5 parts by weight of pigment and 6 parts by weight of nano montmorillonite which are baked and dehydrated in the step 1) into a vacuum kneader in sequence for mixing, heating to 160 ℃, mixing for 1.5 hours, removing low molecules for 2 hours in vacuum, and cooling to obtain a mixed rubber material;

5) adding 2.7 parts by weight of cross-linking agent, 1.5 parts by weight of coupling agent and 0.8 part by weight of catalyst into the semi-finished paint obtained in the step 4), and stirring and mixing uniformly to obtain 4 cups of insulating paint with the viscosity of 32 s;

In this embodiment, the specific surface area of the nano white carbon black is 300g/m²(ii) a The particle size of the aluminum hydroxide is 30 mu m, and the particle size of the decabromodiphenylethane is 60 mu m; the pigment is titanium dioxide; the kinematic viscosity of the hydroxyl-terminated polymethylphenyl siloxane is 9600mpa.s, and the kinematic viscosity of the polymethylphenyl silicone oil is 300 mpa.s; the cross-linking agent is composed of tetraethoxysilane, polyethyl silicate and methyl triacetonesilane which are mixed according to the mass ratio of 1:1: 1; the catalyst is dibutyltin dilaurate; the coupling agent is epoxy propyl trimethoxy silane;

and (3) performance testing:

the performance of the insulating paints prepared in examples 1 to 5 of the present invention was tested according to the industry standard of DL/T-2004, and the results are shown in Table 1

Item

Standard requirements

Example 1

Example 2

Example 3

Example 4

Example 5

Tensile strength

≥3.0Mpa

3.5Mpa

3.3Mpa

3.0Mpa

3.7Mpa

3.43Mpa

Elongation at break

≥300％

340％

310％

300％

350％

339％

Tear strength

≥12KN/m

14.8KN/m

13.1KN/m

12.2KN/m

15.2KN/m

14.5KN/m

Dielectric strength

≥18KV/cm

24.6KV/cm

22.6KV/cm

21.9KV/cm

23.8KV/cm

23.1KV/cm

Flame retardant properties

Not less than FV-1 grade

FV-0 grade

Heat conductivity

——

0.26W/(m.K)

0.22W/(m.K)

0.21W/(m.K)

0.27W/(m.K)

Viscosity of the oil

——

27s

34s

48s

40s

32s

Storage Properties

1 year

As shown in table 2, the use amount of the reinforcing filler nano white carbon black is reduced, the mechanical strength (tensile strength, elongation at break and tear strength) of the insulating paint is directly influenced, the addition of the nano montmorillonite has a synergistic effect with the nano white carbon black, and when the occupied amount of the reinforcing filler is small, the mechanical strength of the insulating paint can still meet the requirement, so that technical support is provided for providing the insulating paint with low filler content, and the viscosity of the insulating paint is ensured to meet the requirement; and the addition of the magnesium stearate ensures that the flame retardant property of the insulating paint still meets the requirement under the condition of small occupied amount of the flame retardant filler, so that the magnesium stearate and other fillers have a synergistic effect, and the flame retardant property and viscosity requirements of the insulating paint are ensured.

2. Clogging of insulated paint in self-blowing cans

In order to test the blocking of the insulating varnish prepared in examples 1 to 5 when used in a self-priming can, two sets of comparative groups, comparative group 1 and comparative group 2, were introduced, and the production method of comparative group 1 was the same as that of example 1 except that a self-priming can with a drain tube was used; comparative group 2 was produced in the same manner as in example 1 except that the amount of the solvent was adjusted so that the coat-4 cup viscosity of the enamel was 55 s; comparative group 3 was produced in the same manner as in example 1 except that the amount of the solvent was adjusted so that the coat-4 cup viscosity of the enamel was 65 s; comparative group 4 was produced in the same manner as in example 1 except that the amount of the solvent was adjusted so that the coat-4 cup viscosity of the enamel was 75 s; comparative example 5 was produced in the same manner as in example 1 except that the amount of the solvent was adjusted so that the coat-4 cup viscosity of the enamel was 85 s;

table 2: blocking of insulating paint in a self-blowing can

Item

1 day

5 days

15 days

30 days

3 months old

6 months old

1 year

Comparative group 1

Non-blocking

Blocking up

——

Comparative group 2

Non-blocking

Blocking up

——

Comparative group 3

Non-blocking

Blocking up

——

Comparative group 4

Non-blocking

Blocking up

——

Comparative group 5

Non-blocking

Blocking up

——

Example 1

Non-blocking

Example 2

Non-blocking

Example 3

Non-blocking

Example 4

Non-blocking

Example 5

Non-blocking

As shown in table 2, whether the insulating paint in the self-spraying tank is blocked or not is determined, and the viscosity of the insulating paint is in a great relationship, and the higher the viscosity of the insulating paint is, the more easily the insulating paint is blocked; meanwhile, whether the self-spraying tank is provided with the liquid guiding pipe or not is also a main reason for causing blockage of self-spraying paint, and the insulation self-spraying paint can not be blocked in the storage time of at least more than 1 year only when the viscosity in the self-spraying paint meets the requirement and the liquid guiding pipe is not installed on the self-spraying tank.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims

1. A production method of insulating self-painting paint for electric power equipment, characterized in that: the method comprises the following steps:

wherein the self-spraying tank is not provided with a liquid guiding pipe;

wherein the viscosity of the insulating paint obtained in the step 5) in a coating-4 cup is 25-50 s.

2. The production method of insulating self-painting for electric power equipment according to claim 1, characterized in that: the specific surface of the nano white carbon black is 150-380g/m²。

3. The production method of insulating self-painting for electric power equipment according to claim 1, characterized in that: the particle size of the aluminum hydroxide is 0.5-30 μm, and the particle size of the decabromodiphenylethane is 40-60 μm.

4. The production method of insulating self-painting for electric power equipment according to claim 1, characterized in that: the kinematic viscosity of the hydroxyl-terminated polymethylphenylsiloxane is 4800-12000mpa.s, and the kinematic viscosity of the polymethylphenylsiloxane is 100-500 mpa.s.

5. The production method of insulating self-painting for electric power equipment according to claim 1, characterized in that: the cross-linking agent is one or more of ethyl orthosilicate, ethyl polysilicate, methyl tributyroximo silane, tetrabutoximo silane, vinyl tributyroxim silane and methyl triacetoxy silane.

6. The production method of insulating self-painting for electric power equipment according to claim 1, characterized in that: the catalyst is one or more of dibutyltin dilaurate, dioctyltin dilaurate, tributyl titanate, tetrabutyl titanate and tetraisobutyl titanate.

7. The production method of insulating self-painting for electric power equipment according to claim 1, characterized in that: the coupling agent is one or more of aminopropyltrimethoxysilane, vinyl trimethoxysilane, epoxypropyl trimethoxysilane and acryloxypropyl trimethoxysilane.

8. The production method of insulating self-painting for electric power equipment according to claim 1, characterized in that: the propellant is R-134 aT.

9. The production method of insulating self-painting for electric power equipment according to claim 1, characterized in that: the insulating paint also comprises 3-6 parts by weight of nano montmorillonite.