WO2024041389A1

WO2024041389A1 - Aqueous high-thermal-conductivity anticorrosive paint and production method therefor

Info

Publication number: WO2024041389A1
Application number: PCT/CN2023/112108
Authority: WO
Inventors: 易盼; 杨臻; 徐金; 莫娟; 王卫东; 房正刚; 樊宝珍; 马裕超; 冯国巍; 韩伟豪; 王宪; 李想; 李毅刚; 高洁; 张辰毓
Original assignee: 中国电力科学研究院有限公司
Priority date: 2022-08-24
Filing date: 2023-08-10
Publication date: 2024-02-29
Also published as: CN115093786A; CN115093786B

Abstract

The embodiments of the present application relate to an aqueous high-thermal-conductivity anticorrosive paint, which comprises a component A and a component B, wherein the component A comprises a film-forming substance, deionized water, a dispersing agent, a defoaming agent, a multi-effect cosolvent, a composite thickener and a high-thermal-conductivity additive; and the component B comprises at least one aqueous curing agent and a cosolvent B, the high-thermal-conductivity additive being a carbon-based thermally conductive material. Further disclosed in the present application is a production method for the high-thermal-conductivity anticorrosive paint, which is used for producing the aqueous high-thermal-conductivity anticorrosive paint. In the present application, a high-thermal-conductivity additive is added to a water-soluble film-forming substance, so as to improve the thermal conductivity of an anticorrosive paint; a plurality of cosolvents are added to the water-soluble film-forming substance, such that a good film-forming effect that the high-thermal-conductivity additive is uniformly distributed in a paint film is realized, thereby achieving good thermal conductivity.

Description

A kind of water-based high thermal conductivity anti-corrosion paint and its production method

Cross-references to related applications

This application is based on a Chinese patent application with application number 202211016990.9, application date is August 24, 2022, and the application name is "A water-based high thermal conductive anticorrosive paint and its production method", and claims the priority of this Chinese patent application, The entire content of the Chinese patent application is hereby incorporated into this application by reference.

Technical field

This application belongs to the field of coatings, and specifically relates to a water-based high thermal conductivity anti-corrosion paint and its production method.

Background technique

As we all know, transformers are important equipment for power transmission and transformation in power systems. They have the characteristics of wide service range and complex and diverse environments. In order to improve the environmental adaptability and service reliability of transformers, organic coatings are usually used for protective treatment. As far as the coating protection system is concerned, solvent-based acrylic anti-corrosion coating or polyurethane anti-corrosion coating is often used, and its color is adjusted to sea gray. It is worth noting that during the coating process of transformers and other power transmission and transformation equipment coatings, a large amount of organic solvents are added to provide a suitable environment for the film-forming substances, pigments, fillers and other components to be fully mixed and dispersed, making the coating easy to process and construct to form a film. After construction, organic solvents will evaporate from the coating film into the atmospheric environment, and their volatile organic compounds (VOCs) emissions are about 300-500g/L. These pollutants seriously pollute the atmospheric environment and pose a threat to the regional ecological environment.

Different from ordinary engineering machinery and equipment, during the operation of power transmission and transformation equipment such as transformers, the windings, cores, etc. will cause losses, which will cause the temperature of the transformer to rise. Especially during hot summer and peak power consumption periods, the hot spot temperature of the transformer may exceed 85°C. , has a serious impact on the aging rate of the insulating paper and other related components inside the transformer, posing a threat to the safe operation and service life of the transformer. Although the existing water-based anti-corrosion coatings have solved the environmental protection problem to a certain extent, the problems of small thermal conductivity and poor film-forming performance have not yet been solved in equipment such as transformers that work in continuous high-temperature environments. Long-term continuous operation at high temperatures will cause This causes the paint film to age, crack, and fall off; therefore, existing water-based anticorrosive coatings have problems with low thermal conductivity and poor film-forming performance. In order to solve the problems of low heat dissipation efficiency and poor film-forming properties of water-based coatings in power transmission and transformation equipment such as transformers, it is necessary to develop new high thermal conductivity, environmentally friendly and anti-corrosion coating technologies.

Contents of the invention

The purpose of this application is to solve the problem of low thermal conductivity of existing water-based anti-corrosion coatings.

The purpose of this application is achieved by adopting the following technical solutions:

A water-based high thermal conductivity anti-corrosion paint, which includes component A and component B; wherein the component A includes film-forming substances, deionized water, dispersants, defoaming agents, multi-effect co-solvents, composite thickeners and High thermal conductivity additive; the B component includes at least one water-based curing agent and cosolvent B; the high thermal conductivity additive The addition is carbon-based thermal conductive material.

Preferably, the A component also includes mineral pigments and/or colorants.

Preferably, the carbon-based thermally conductive material includes one or a combination of carbon nanotubes, carbon nanohorns, graphene, and ultrafine graphite powder.

Preferably, the film-forming material is water-based polyurethane resin.

Preferably, the mineral pigment includes: one or more of titanium dioxide, lemon yellow powder, iron red powder and iron blue powder.

Preferably, the multi-effect co-solvent includes: film-forming aid, drying control agent, adhesion promoter and leveling agent.

Preferably, the film-forming aid includes dipropylene glycol butyl ether or alcohol ester dodecano film-forming aid.

Preferably, the drying control agent includes diethylene glycol monobutyl ether or propylene glycol.

Preferably, the adhesion promoter includes one or more of silicone twin structure surfactant, polyether modified silicone oil, polyether siloxane copolymer or hydrophobic short carbon chain-ethoxy compound.

Preferably, the leveling agent includes one or more of non-silicon copolymer, polyacrylate, polyether-modified silicone solution or ionic polyacrylate solution.

Preferably, the composite thickener includes: nonionic polyurethane polymer and/or alkali-swellable acrylic associative thickener.

Preferably, the water-based curing agent includes polyurethane water-based curing agent.

Preferably, the co-solvent B includes PGDA propylene glycol diacetate.

Preferably, the dispersant includes: organically modified polyacrylate containing pigment affinity groups or block copolymer containing pigment affinity groups.

Preferably, the defoaming agent includes: polyethersiloxane copolymer emulsion.

Preferably, the A component includes the following raw materials in parts by mass: 50 to 56 parts of water-based polyurethane resin; 0.48 to 0.52 parts of dispersant; 0.08 to 0.12 parts of defoaming agent; 1 to 6 parts of high thermal conductivity additives; multi-effect additives. Solvent 5.32～6.48; composite thickener 0.56～0.74 parts; mineral pigment and/or color paste 0～19.357 parts; deionized water 15～25 parts.

Preferably, the multi-effect cosolvent includes the following parts by mass of raw materials: 2.2 to 2.7 parts of film-forming aid; 2.2 to 2.7 parts of drying control agent; 0.46 to 0.54 parts of adhesion promoter; and 0.46 to 0.54 parts of leveling agent.

Based on the same inventive concept, this application also provides a production method of water-based high thermal conductivity anti-corrosion paint, which is used to produce the water-based high thermal conductivity anti-corrosion paint, which includes the preparation of component A and the preparation of component B; the preparation of component A The method includes: preparing a film-forming material and stirring evenly; adding a high thermal conductivity additive in proportion to the film-forming material and stirring to obtain a uniformly mixed dispersion, introducing the dispersion into a grinder and grinding it to a set fineness or less, and then Add the multi-effect co-solvent and the composite thickener under stirring and stir evenly; the preparation of component B includes: adding the co-solvent B to the water-based curing agent and stir evenly.

Compared with the existing technology, the beneficial effects of this application are:

1. A water-based high thermal conductivity anti-corrosion paint, which includes component A and component B; wherein component A includes film-forming substances, deionized water, dispersant, defoaming agent, multi-effect co-solvent, and composite thickening agent and high thermal conductivity additives; the B component includes at least one water-based curing agent and co-solvent B; the high thermal conductivity additive is a carbon-based thermal conductive material; in this application, by adding high thermal conductivity to water-soluble film-forming substances Add to It not only eliminates the environmental pollution caused by volatile organic compounds, but also improves the thermal conductivity of anti-corrosion paint; by adding a variety of co-solvents to the film-forming substances, it achieves good film formation with high thermal conductivity additives evenly distributed in the paint film. effect, thereby achieving excellent thermal conductivity.

Description of drawings

Figure 1 is a graph showing the relationship between the added amount of highly thermally conductive anti-corrosion substances and the thermal conductivity of the coating in this application;

Figure 2 is a comparison chart of the morphology after the salt spray test without adding a high thermal conductive substance coating and adding 2% high thermal conductive anti-corrosion substance water-based coating;

Figure 3 shows the temperature change curve of a transformer coated with traditional solvent-based coating under self-cooling conditions;

Figure 4 shows the temperature change curve of a transformer coated with traditional solvent coating under air cooling conditions;

Figure 5 is a temperature change curve of a transformer coated with the water-based high thermal conductivity anti-corrosion paint of this application under self-cooling conditions;

Figure 6 is a temperature change curve of a transformer coated with the water-based high thermal conductivity anti-corrosion paint of this application under air-cooling conditions.

Detailed ways

In order to further describe the technical solution of the present application in detail, a detailed description will be made below with reference to the accompanying drawings and examples.

Example 1

This application provides a water-based high thermal conductivity anti-corrosion paint, which includes component A and component B; wherein the component A includes film-forming substances, deionized water, dispersants, defoaming agents, multi-effect co-solvents, and composite additives. Thickener and high thermal conductivity additive; the B component includes at least one water-based curing agent and co-solvent B; the high thermal conductivity additive is a carbon-based thermal conductive material.

The film-forming substance is water-based polyurethane resin.

The multi-effect co-solvent includes: film-forming aids, drying control agents, adhesion promoters and leveling agents; in order to achieve uniform dispersion of high thermal conductivity additives in the paint film to improve thermal conductivity efficiency and film-forming quality, the After experimental optimization, the multi-effect co-solvent was finalized into a multi-effect solvent coordination system including six co-solvents. For the convenience of description, the six co-solvents are identified in order: co-solvent No. 1 (film-forming aid), co-solvent No. Solvent No. 2 (drying control agent), Co-solvent No. 3 (adhesion promoter), Co-solvent No. 4 (adhesion promoter), Co-solvent No. 5 (leveling agent), Co-solvent No. 6 (leveling agent) .

The composite thickener uses two thickeners to form a composite thickening system, including thickener No. 1 and thickener No. 2.

The carbon-based thermally conductive material includes one or a combination of carbon nanotubes, carbon nanohorns, graphene, and ultrafine graphite powder.

The water-based curing agent includes polyurethane water-based curing agent.

The A component also includes mineral pigments and/or color pastes. The color paste, as the name suggests, is a pigment concentrate, which is developed through rigorous processing technology using different pigments through pigment surface treatment, surface wrapping and other technologies. The function of the mineral pigment is to modulate the basic color tone of the anti-corrosion paint, and at the same time, the chemical properties of the mineral pigment are stable to ensure good color stability of the anti-corrosion paint; the function of the color paste is It is used to finely adjust the color of anti-corrosion paint to make the color more full and delicate. Mineral pigments may include: one or more of titanium dioxide, lemon yellow powder, iron red powder, and iron blue powder; color paste may include one or more of medium yellow paste, white paste, phthalocyanine blue paste, and phthalocyanine green paste. You can also choose mineral pigments and color pastes of different colors according to your needs.

The co-solvent B includes PGDA propylene glycol diacetate.

The dispersant includes: organically modified polyacrylate containing pigment affinity groups or high molecular weight block copolymer containing pigment affinity groups. The dispersant deflocculates the pigment through steric stabilization, thereby promoting uniform dispersion of high thermal conductivity additives and higher thermal conductivity efficiency.

The defoaming agent includes: polyethersiloxane copolymer emulsion.

The A component includes the following raw materials in parts by mass: 50 to 56 parts of water-based polyurethane resin; 0.48 to 0.52 parts of dispersant; 0.08 to 0.12 parts of defoaming agent; 0 to 14 parts of titanium dioxide; 0 to 0.55 parts of lemon yellow powder; iron 0 to 0.1 parts of red powder; 0 to 0.05 parts of iron blue powder; 1 to 6 parts of high thermal conductivity additives; 2.2 to 2.7 parts of cosolvent No. 1; 2.2 to 2.7 parts of cosolvent No. 2; 0.18 to 0.22 parts of cosolvent No. 3; Co-solvent No. 4 0.28-0.32 parts; Co-solvent No. 5 0.28-0.32 parts; Co-solvent No. 6 0.18-0.22 parts; Thickener No. 1 0.28-0.37 parts; Thickener No. 2 0.28-0.37 parts; medium yellow pulp 0 to 0.6 parts; 0 to 4 parts of white pulp; 0 to 0.035 parts of phthalocyanine blue pulp; 0 to 0.022 parts of phthalocyanine green pulp; 15 to 25 parts of deionized water.

The B component includes the following raw materials in parts by mass: 70 to 80 parts of polyurethane water-based curing agent; 20 to 30 parts of cosolvent B.

In a specific implementation ratio, the component A includes the following raw materials in parts by mass: 53 parts by mass of water-based polyurethane resin; 0.5 part by dispersant; 0.1 part by defoaming agent; 13.5 parts by titanium dioxide; 0.51 parts by lemon yellow powder; 0.06 part by iron red powder; 0.03 parts of iron blue powder; 2 parts of high thermal conductivity additives; 2.5 parts of co-solvent No. 1; 2.5 parts of co-solvent No. 2; 0.2 parts of co-solvent No. 3; 0.3 parts of co-solvent No. 4; 0.3 parts of co-solvent No. 5; co-solvent 0.2 parts of No. 6; 0.3 parts of Thickener No. 1; 0.3 parts of Thickener No. 2; 0.19 parts of medium yellow pulp; 0.82 parts of white pulp; 0.02 parts of phthalocyanine blue pulp, 0.02 parts of phthalocyanine green pulp; 22.65 parts of deionized water .

The B component includes the following parts by mass of raw materials: 75 parts of polyurethane water-based curing agent; 25 parts of co-solvent B.

The main component of the dispersant is organically modified polyacrylate containing pigment affinity groups or block copolymer containing pigment affinity groups.

The main component of the defoaming agent is polyethersiloxane copolymer emulsion.

The main component of the co-solvent No. 1 is DPNB dipropylene glycol butyl ether.

The main component of the co-solvent No. 2 is DBG diethylene glycol monobutyl ether.

The main component of the co-solvent No. 3 is an organic silicon twin structure surfactant.

The main component of the co-solvent No. 4 is polyether siloxane copolymer.

The main component of the cosolvent No. 5 is a non-silicon copolymer, and the non-silicon copolymer is an acrylic copolymer.

The main component of the co-solvent No. 6 is polyether modified silicone solution.

The main component of the thickener No. 1 is non-ionic polyurethane polymer.

The main component of the thickener No. 2 is an alkali-swollen acrylic associative thickener.

The main component of the B component co-solvent is PGDA propylene glycol diacetate.

Co-solvent No. 1 is used as a film-forming aid. Its function is to assist in the film formation of the paint film. On the other hand, it promotes the uniform dispersion of high thermal conductivity additives.

Cosolvent No. 2 is used as a drying control agent. Its function is to reduce the drying speed of the paint film and facilitate the uniform distribution of high thermal conductivity additives. During the spraying or brushing process, the high thermal conductivity additives are unevenly distributed due to the physical effects of external forces and control the paint. The film drying speed facilitates the redistribution of highly thermally conductive additives to obtain a paint film with uniform thermal conductivity.

Co-solvent No. 3 and Co-solvent No. 4 are used as adhesion promoters. Their function is to wet the base material to improve the adhesion between the paint film and the base surface, and to avoid the enrichment of high thermal conductivity additives that will lead to a decrease in the adhesion of the paint film and the addition of high thermal conductivity additives. Material utilization rate decreases.

Co-solvent No. 5 and Co-solvent No. 6 are used as leveling agents. Their function is to assist the leveling of the paint film surface, improve construction convenience and paint film flatness, and at the same time improve the uniformity of distribution of high thermal conductivity additives to avoid uneven paint surfaces. Thermal conductivity is uneven.

Interaction: Co-solvent No. 2 solvent reduces the drying speed of the paint film and increases the time for paint film leveling and distribution and diffusion of high thermal conductivity additives. Co-solvent No. 3 and Co-solvent No. 4 reduce the surface tension of the substrate to avoid the enrichment of highly thermally conductive additives. Co-solvent No. 1 further promotes the even dispersion of high thermal conductive additives within the paint film on the basis of dispersants. Co-solvent No. 5 , co-solvent No. 6 solvent can level the paint film while improving the uniformity of distribution of high thermal conductivity additives to avoid uneven paint surfaces and uneven thermal conductivity. Six kinds of co-solvents together form a multi-effect co-solvent in the composite system, which makes the paint film formation smoother and more complete, and the high thermal conductivity additives are more evenly distributed to ensure uniform high thermal conductivity.

Co-solvent No. 3 and Co-solvent No. 4 have the same function. You can also use only one of them, but the effect is better and the operation is easier when used together. Cosolvent No. 5 and Cosolvent No. 6 have the same function. You can also use only one of them, but the leveling effect is better when used together. The high thermal conductivity additives are evenly distributed and do not float and are exposed. The construction film quality is good and the thermal conductivity of the paint film is high. High and beautiful in appearance, it is also easier to operate.

Co-solvent No. 1 can be selected: alcohol ester twelve film-forming additives. Optional co-solvent No. 2: propylene glycol. Optional co-solvent No. 3: polyether modified silicone oil. Co-solvent No. 4 can be selected: hydrophobic short carbon chain-ethoxy compound. Cosolvent No. 5 optional: polyacrylate. Optional co-solvent No. 6: ionic polyacrylate solution.

This application also provides a preparation method of the water-based high thermal conductivity anti-corrosion topcoat coating, which includes the following steps:

1) Weigh separately by mass parts: water-based polyurethane resin, dispersant, defoaming agent, titanium dioxide, lemon yellow powder, iron red powder, iron blue powder, high thermal conductivity additive, cosolvent No. 1, cosolvent No. 2, cosolvent No. 3, co-solvent No. 4, co-solvent No. 5, co-solvent No. 6, thickener No. 1, thickener No. 2, medium yellow pulp, white pulp, phthalocyanine blue pulp, phthalocyanine green pulp, deionized water.

2) Let stand and add water-based polyurethane resin, dispersant, defoaming agent, and deionized water, and disperse at 400 to 600 rpm for 10 to 15 minutes; then, while stirring, add titanium dioxide, lemon yellow powder, iron red powder, After the addition of iron blue powder and graphene, continue to disperse for 20 to 30 minutes; introduce the dispersion into a grinder and grind until the fineness drops below 20 μm; take the dispersion out of the grinder and into the disperser, and add cosolvent 1 while stirring No., cosolvent No. 2, cosolvent No. 3, cosolvent No. 4, cosolvent No. 5, cosolvent No. 6, thickener No. 1, thickener No. 2, adjust the slurry When the desired viscosity is reached, continue dispersing for 20 to 30 minutes; add medium yellow slurry, white slurry, phthalocyanine green slurry and phthalocyanine blue slurry under stirring to make the topcoat reach sea gray to obtain component A of the water-based high thermal conductivity anticorrosive topcoat.

3) Add cosolvent B to the polyurethane water-based curing agent and mix evenly at a certain rotation speed to obtain component B.

4) When using the paint, mix component A and component B in a certain proportion and then apply.

The water-based high thermal conductivity anti-corrosion topcoat of this application is composed of optimized raw materials, and the content of each raw material is optimized to select an appropriate proportion of water-based polyurethane resin, dispersant, defoaming agent, titanium dioxide, lemon yellow powder, iron red powder, iron blue powder, high Thermal conductive additives, cosolvent No. 1, cosolvent No. 2, cosolvent No. 3, cosolvent No. 4, cosolvent No. 5, cosolvent No. 6, thickener No. 1, thickener No. 2, medium yellow paste, White pulp, phthalocyanine blue pulp, phthalocyanine green pulp, and deionized water not only give full play to their respective advantages, but also complement and promote each other. The multi-effect co-solvent of the composite system is composed of co-solvent No. 1, co-solvent No. 2, co-solvent No. 3, co-solvent No. 4, co-solvent No. 5 and co-solvent No. 6 to ensure that the high thermal conductivity additives are distributed inside the paint film. Uniform, significantly improving the thermal conductivity efficiency of high thermal conductivity additives, avoiding the problem of low thermal conductivity of the paint film due to uneven distribution of high thermal conductivity additives, making the prepared water-based high thermal conductivity anti-corrosion topcoat coating have excellent thermal conductivity, Anti-corrosion and environmental protection properties.

The water-based high thermal conductivity anti-corrosion topcoat paint of this application is added with an appropriate proportion of high thermal conductivity additives. This substance is a mixture of carbon nanotubes, carbon nanohorns, graphene, and ultra-fine graphite powder, which improves the anti-corrosion and thermal conductivity of the top paint. performance, while also reducing application costs compared to adding pure graphene and other carbon nanomaterials. The high thermal conductivity additives of the present application are evenly dispersed and cooperate with other components to play a good synergistic effect, so that the water-based high thermal conductivity anti-corrosion topcoat of the present application not only obtains good thermal conductivity but also has excellent anti-corrosion effect to a certain extent. .

test case

The environmental performance of the water-based polyurethane topcoat with 2% high thermal conductivity substances was tested and found that its VOCs (Volatile Organic Compounds) content was 179g/L. Compared with traditional solvent-based topcoats (304g/L), the VOCs content was 179g/L. Emissions were reduced by 41.1%.

The transient plate heat source method was used to test the thermal conductivity of coatings with different proportions of high thermal conductivity substances. The results are shown in Figure 1. It can be seen that the thermal conductivity of the topcoat without adding high thermal conductive substances is only 0.1638W/(m·K). With the addition of 1% high thermal conductivity anti-corrosion substances to the water-based polyurethane coating, its thermal conductivity increased significantly; when the addition amount of high thermal conductivity anti-corrosion substances continued to increase, the thermal conductivity of the coating decreased slightly. Overall, the addition amount was At 2%, the thermal conductivity of the coating is the most excellent, reaching 1.222W/(m·K).

As shown in Figure 2, salt spray tests were subsequently carried out on the modified topcoat with the best thermal conductivity (adding 2% high thermal conductivity substance) and the ordinary water-based topcoat; among them, a, b, c, d are the ones adding 2% high thermal conductivity Corrosion morphology pictures of different stages of material coating; e, f, g, h are corrosion morphology pictures of different stages of coating samples without adding high thermal conductivity substance; a and e are 0 days; b and f are 3 days; c and g are 6 days; d and h are 10 days. The coating thickness is 100μm. The results showed that after 3 days of salt spray test, slight rust spots appeared on the surface of the ordinary topcoat. As the salt spray time extended (6 days), the surface corrosion degree intensified and the number of rust spots increased. After 10 days of salt spray time, the surface of the sample was corroded. The points are connected into sheets, indicating that the base metal has been severely corroded. In contrast, after 10 days of salt spray testing, no obvious rust spots were found on the surface of the topcoat with 2% high thermal conductivity substances added, indicating that the water-based environmentally friendly high thermal conductivity anti-corrosion coating has more excellent protective properties. able.

Compared with the existing technology, the beneficial effect of this application is to solve the problems of serious pollution of transformer anti-corrosion topcoat (traditional solvent-based topcoat) and poor thermal conductivity (traditional solvent-based topcoat, water-based paint). The water-based high thermal conductivity anti-corrosion topcoat uses water as the solvent during the preparation process, which significantly reduces VOCs emissions and improves its environmental performance. The added high thermal conductivity substances optimize the heat transfer mechanism of the topcoat. Compared with ordinary water-based topcoats (0.1638W/(m·K)), the thermal conductivity of water-based high thermal conductivity anti-corrosion topcoats has increased to 1.222W/(m·K). K). Through the salt spray test, it was found that slight rust spots appeared on the surface of the ordinary topcoat after 3 days of salt spray test. As the salt spray time prolongs, the surface corrosion degree intensifies and the number of rust spots increases. In contrast, after 10 days of salt spray testing, no obvious rust spots were found on the surface of the topcoat with 2% high thermal conductivity substances added, indicating that the water-based environmentally friendly high thermal conductivity anti-corrosion coating has more excellent protective properties.

A product body with a capacity of 200kVA/10kV was selected as the test heat source, and transformer temperature rise simulation experiments were carried out in self-cooling and air-cooling environments. One of the transformers is coated with the high thermal conductivity environmentally friendly paint of this application; the other is coated with traditional solvent-based paint.

As shown in Figure 3, the temperature change curve of a transformer coated with a traditional solvent-based coating under self-cooling conditions; B, C, and D represent the test environment temperature; E and F represent the temperature of the oil top layer. The transformer can be seen from the figure. The temperature rise value is 34.8℃.

As shown in Figure 4, the temperature change curve of a transformer coated with traditional solvent coating under air-cooling conditions; B, C, and D represent the test environment temperature; E and F represent the temperature of the oil top layer. From the figure, you can see the transformer The temperature rise value is 25.8℃.

As shown in Figure 5, the temperature change curve of the transformer coated with the water-based high thermal conductivity anti-corrosion paint of this application under self-cooling conditions; B, C, D represent the test environment temperature; E and F represent the temperature of the oil top layer, as can be seen from the figure The temperature rise of the transformer is 32.7℃.

As shown in Figure 6, the temperature change curve of a transformer coated with the water-based high thermal conductivity anti-corrosion paint of this application under air-cooling conditions; B, C, and D represent the test environment temperature; E and F represent the temperature of the oil top layer, as can be seen from the figure The temperature rise of the transformer is 24.1℃.

After comparative analysis, it can be found that in a self-cooling environment, the temperature rise values of transformers coated with traditional solvent-based coatings and modified high thermal conductivity coatings are 34.8°C and 32.7°C respectively, indicating that after using modified high thermal conductivity anti-corrosion coatings, the temperature rise value of the transformer decreased by 2.1℃. In an air-cooled environment, the temperature rise of the transformer coated with traditional solvent-based coatings and modified high thermal conductivity coatings were 25.8°C and 24.1°C respectively, indicating that the temperature rise of the transformer was reduced by 1.7°C after the use of modified high thermal conductivity anti-corrosion coatings. This seems to be a small value. In fact, according to the "6-degree rule", every 6K increase in the transformer hot spot temperature will cause the insulation aging rate of the oil-impregnated paper to double. It can be seen that the application of high thermal conductivity environmentally friendly coatings will significantly extend the Service life of transformer insulation paper.

Example 2

A formula implementation ratio, the A component includes the following raw materials in parts by mass: 52.5 parts of water-based polyurethane resin; 0.49 parts of dispersant; 0.09 parts of defoaming agent; 13.5 parts of titanium dioxide; 0.2 parts of lemon yellow powder; 0.05 parts of iron red powder; 0.02 parts of iron blue powder; 1.5 parts of high thermal conductivity additives; 2.3 parts of cosolvent No. 1; 2.3 parts of cosolvent No. 2; 0.19 parts of cosolvent No. 3; 0.29 parts of cosolvent No. 4; 0.29 parts of cosolvent No. 5; cosolvent 0.19 parts of No. 6; 0.29 parts of Thickener No. 1; 0.29 parts of Thickener No. 2; 0.16 parts of medium yellow pulp; 0.3 parts of white pulp; 0.031 parts of phthalocyanine blue pulp, 0.019 parts of phthalocyanine green pulp; 25 parts of deionized water.

The main component of the co-solvent No. 4 is polyether siloxane copolymer.

The main component of the co-solvent No. 5 is non-silicon copolymer.

The main component of the thickener No. 1 is non-ionic polyurethane polymer.

The high thermal conductivity additive is a carbon-based thermal conductive material. The carbon-based thermally conductive material includes one or a combination of carbon nanotubes, carbon nanohorns, graphene, and ultrafine graphite powder.

This application also provides a preparation method of the water-based environmentally friendly high thermal conductivity anti-corrosion coating, which includes the following steps:

2) Let stand and add 525g of water-based polyurethane resin, 4.9g of dispersant, 0.9g of defoaming agent, and 250g of deionized water, and disperse at 400 to 600 rpm for 10 to 15 minutes; then, while stirring, add 135g of titanium dioxide in proportion. , lemon yellow powder 2g, iron red powder 0.5g, iron blue powder 0.2g, high thermal conductivity additive 15g, after the addition is completed, continue to disperse for 20 to 30 minutes; introduce the dispersion into a grinder and grind until the fineness drops below 20 μm; disperse The liquid is exported from the grinder and introduced into the disperser. Under stirring, add 23g of cosolvent No. 1, 23g of cosolvent No. 2, 1.9g of cosolvent No. 3, 2.9g of cosolvent No. 4, 2.9g of cosolvent No. 5, and 1.9 cosolvent No. 6. g. 2.9g of thickener No. 1 and 2.9g of thickener No. 2. Adjust the slurry to the appropriate viscosity and continue dispersing for 20 to 30 minutes; add 1.6g of medium yellow slurry, 3g of white slurry, and phthalocyanine blue while stirring. Add 0.31g of slurry and 0.19g of phthalocyanine green slurry to make the topcoat reach sea gray, and obtain component A of the water-based high thermal conductivity anticorrosive topcoat.

3) Add 25g of cosolvent B to 75g of polyurethane water-based curing agent, and mix evenly at a certain rotation speed to obtain component B.

Except for the formula ratio, the remaining technical contents are the same as those in Embodiment 1, so they will not be described again.

The thermal conductivity of the water-based high thermal conductivity anti-corrosion paint in this embodiment is 1.04W/(m·K). Compared with ordinary water-based top paint (0.1638 W/(m·K)), the thermal conductivity of the water-based high thermal conductivity anti-corrosion top paint is With an increase of 0.8762W/(m·K), the thermal conductivity is significantly improved.

Example 3

A formula implementation ratio, the A component includes the following parts by mass of raw materials: 53 parts by mass of water-based polyurethane resin; 0.5 part by dispersant; 0.1 part by defoaming agent; 13.6 parts by titanium dioxide; 0.3 part by lemon yellow powder; 0.08 part by iron red powder; 0.032 parts of iron blue powder; 2 parts of high thermal conductivity additives; 2.4 parts of co-solvent No. 1; 2.4 parts of co-solvent No. 2; 0.2 parts of co-solvent No. 3; 0.3 parts of co-solvent No. 4; 0.3 parts of co-solvent No. 5; co-solvent 0.2 parts of No. 6; 0.3 parts of Thickener No. 1; 0.3 parts of Thickener No. 2; 0.2 parts of medium yellow pulp; 0.32 parts of white pulp; 0.025 parts of phthalocyanine blue pulp, 0.02 parts of phthalocyanine green pulp; 23.423 parts of deionized water .

The thermal conductivity of the water-based high thermal conductivity anti-corrosion paint in this embodiment is 1.222W/(m·K). Compared with the ordinary water-based top paint (0.1638 W/(m·K)), the thermal conductivity of the water-based high thermal conductivity anti-corrosion top paint is Increased by 1.0582W/(m·K), the thermal conductivity performance is significantly improved.

Example 4

A formula implementation ratio, the A component includes the following parts by mass of raw materials: 53.5 parts of water-based polyurethane resin; 0.51 parts of dispersant; 0.11 parts of defoaming agent; 13.7 parts of titanium dioxide; 04 parts of lemon yellow powder; 0.09 parts of iron red powder; 0.035 parts of iron blue powder; 2.5 parts of high thermal conductivity additives; 2.5 parts of co-solvent No. 1; 2.5 parts of co-solvent No. 2; 0.21 parts of co-solvent No. 3; 0.31 parts of co-solvent No. 4; 0.31 parts of co-solvent No. 5; co-solvent 0.21 parts of No. 6; 0.31 parts of Thickener No. 1; 0.31 parts of Thickener No. 2; 0.3 parts of medium yellow pulp; 0.35 parts of white pulp; 0.028 parts of phthalocyanine blue pulp, 0.021 parts of phthalocyanine green pulp; 21.796 parts of deionized water .

The thermal conductivity of the water-based high thermal conductivity anti-corrosion paint in this embodiment is 1.189W/(m·K). Compared with the ordinary water-based top paint (0.1638 W/(m·K)), the thermal conductivity of the water-based high thermal conductivity anti-corrosion top paint is Increased by 1.0252W/(m·K), the thermal conductivity is significantly improved.

Example 5

A formula implementation ratio, the A component includes the following raw materials in parts by mass: 54 parts by mass of water-based polyurethane resin; 0.515 parts by dispersant; 0.12 parts by defoaming agent; 13.8 parts by titanium dioxide; 0.45 parts by lemon yellow powder; 0.03 part by iron red powder; 0.04 parts of iron blue powder; 3 parts of high thermal conductivity additives; 2.6 parts of cosolvent No. 1; 2.6 parts of cosolvent No. 2; 0.215 parts of cosolvent No. 3; 0.315 parts of cosolvent No. 4; 0.315 parts of cosolvent No. 5; cosolvent 0.215 parts of No. 6; 0.32 parts of Thickener No. 1; 0.32 parts of Thickener No. 2; 0.4 parts of medium yellow pulp; 0.38 parts of white pulp; 0.03 parts of phthalocyanine blue pulp, 0.021 parts of phthalocyanine green pulp; 20.314 parts of deionized water .

The thermal conductivity of the water-based highly thermally conductive anticorrosive paint in this embodiment is 1.149W/(m·K), which is the same as that of ordinary Compared with the water-based topcoat (0.1638W/(m·K)), the thermal conductivity of the water-based high thermal conductivity anti-corrosion topcoat is increased by 0.9852W/(m·K), and the thermal conductivity is significantly improved.

Example 6

A formula implementation ratio, the A component includes the following raw materials in parts by mass: 54.5 parts of water-based polyurethane resin; 0.518 parts of dispersant; 0.115 parts of defoaming agent; 13.9 parts of titanium dioxide; 0.5 parts of lemon yellow powder; 0.04 parts of iron red powder; 0.045 parts of iron blue powder; 4 parts of high thermal conductivity additives; 2.65 parts of cosolvent No. 1; 2.65 parts of cosolvent No. 2; 0.218 parts of cosolvent No. 3; 0.318 parts of cosolvent No. 4; 0.318 parts of cosolvent No. 5; cosolvent 0.218 parts of No. 6; 0.33 parts of Thickener No. 1; 0.33 parts of Thickener No. 2; 0.45 parts of medium yellow pulp; 0.39 parts of white pulp; 0.032 parts of phthalocyanine blue pulp, 0.02 parts of phthalocyanine green pulp; 18.458 parts of deionized water .

The thermal conductivity of the water-based high thermal conductivity anti-corrosion paint in this embodiment is 1.129W/(m·K). Compared with ordinary water-based top paint (0.1638 W/(m·K)), the thermal conductivity of the water-based high thermal conductivity anti-corrosion top paint is With an increase of 0.9652W/(m·K), the thermal conductivity is significantly improved.

Example 7

A formula implementation ratio, the A component includes the following parts by mass of raw materials: 54.8 parts of water-based polyurethane resin; 0.519 parts of dispersant; 0.118 parts of defoaming agent; 13.95 parts of titanium dioxide; 0.51 parts of lemon yellow powder; 0.09 parts of iron red powder; 0.048 parts of iron blue powder; 4.5 parts of high thermal conductivity additives; 2.68 parts of cosolvent No. 1; 2.68 parts of cosolvent No. 2; 0.185 parts of cosolvent No. 3; 0.285 parts of cosolvent No. 4; 0.285 parts of cosolvent No. 5; cosolvent 0.185 parts of No. 6; 0.34 parts of Thickener No. 1; 0.34 parts of Thickener No. 2; 0.5 parts of medium yellow pulp; 0.28 parts of white pulp; 0.033 parts of phthalocyanine blue pulp, 0.021 parts of phthalocyanine green pulp; 17.651 parts of deionized water .

The thermal conductivity of the water-based high thermal conductivity anti-corrosion paint in this embodiment is 1.131W/(m·K). Compared with ordinary water-based top paint (0.1638 W/(m·K)), the thermal conductivity of the water-based high thermal conductivity anti-corrosion top paint is With an increase of 0.9672W/(m·K), the thermal conductivity is significantly improved.

Example 8

A formula implementation ratio, the A component includes the following raw materials in parts by mass: 51 parts by mass of water-based polyurethane resin; 0.485 parts by dispersant; 0.085 parts by defoaming agent; 13.2 parts by titanium dioxide; 0.54 parts by lemon yellow powder; 0.03 part by iron red powder; 0.049 parts of iron blue powder; 5 parts of high thermal conductivity additives; 2.25 parts of cosolvent No. 1; 2.25 parts of cosolvent No. 2; 0.205 parts of cosolvent No. 3; 0.305 parts of cosolvent No. 4; 0.305 parts of cosolvent No. 5; cosolvent 0.219 parts of No. 6; 0.36 parts of Thickener No. 1; 0.36 parts of Thickener No. 2; 0.55 parts of medium yellow pulp; 0.31 parts of white pulp; 0.034 parts of phthalocyanine blue pulp, 0.022 parts of phthalocyanine green pulp; 22.441 parts of deionized water .

The thermal conductivity of the water-based high thermal conductivity anti-corrosion paint in this embodiment is 1.117W/(m·K). Compared with the ordinary water-based top paint (0.1638 W/(m·K)), the thermal conductivity of the water-based high thermal conductivity anti-corrosion top paint is With an increase of 0.9532W/(m·K), the thermal conductivity is significantly improved.

Example 9

A formula implementation ratio, the A component includes the following raw materials in parts by mass: 50 parts by mass of water-based polyurethane resin; 0.485 parts by dispersant; 0.85 parts by defoaming agent; 13.2 parts by titanium dioxide; 0.54 parts by lemon yellow powder; 0.03 part by iron red powder; 0.049 parts of iron blue powder; 6 parts of high thermal conductivity additives; 2.25 parts of co-solvent No. 1; 2.25 parts of co-solvent No. 2; 0.205 parts of co-solvent No. 3; 0.3 parts of co-solvent No. 4; 0.3 parts of co-solvent No. 5; co-solvent 0.218 parts of No. 6; 0.37 parts of Thickener No. 1; 0.37 parts of Thickener No. 2; 0.6 parts of medium yellow pulp; 4 parts of white pulp; 0.035 parts of phthalocyanine blue pulp, 0.022 parts of phthalocyanine green pulp; 17.926 parts of deionized water .

The thermal conductivity of the water-based high thermal conductivity anti-corrosion paint in this embodiment is 1.05W/(m·K). Compared with ordinary water-based top paint (0.1638 W/(m·K)), the thermal conductivity of the water-based high thermal conductivity anti-corrosion top paint is Increased by 0.8862W/(m·K), the thermal conductivity is significantly improved.

Example 10

A formula implementation ratio, the A component includes the following parts by mass of raw materials: 55 parts by mass of water-based polyurethane resin; 0.52 parts by dispersant; 0.12 parts by defoaming agent; 14 parts by titanium dioxide; 0.55 parts by lemon yellow powder; 0.1 part by iron red powder; 0.05 part of iron blue powder; 1 part of high thermal conductivity additive; 2.7 parts of cosolvent No. 1; 2.7 parts of cosolvent No. 2; 0.22 part of cosolvent No. 3; 0.32 part of cosolvent No. 4; 0.32 part of cosolvent No. 5; cosolvent 0.22 parts of No. 6; 0.37 parts of Thickener No. 1; 0.37 parts of Thickener No. 2; 0.6 parts of medium yellow pulp; 4 parts of white pulp; 0.035 parts of phthalocyanine blue pulp, 0.022 parts of phthalocyanine green pulp; 16.783 parts of deionized water .

The thermal conductivity of the water-based high thermal conductivity anti-corrosion paint in this embodiment is 0.844W/(m·K). Compared with the ordinary water-based top paint (0.1638 W/(m·K)), the thermal conductivity of the water-based high thermal conductivity anti-corrosion top paint is With an increase of 0.6802W/(m·K), the thermal conductivity is significantly improved.

Example 11

A formula implementation ratio, the A component includes the following parts by mass of raw materials: 55 parts by mass of water-based polyurethane resin; 0.52 parts by dispersant; 0.12 parts by defoaming agent; 14 parts by titanium dioxide; 0.55 parts by lemon yellow powder; 0.1 part by iron red powder; 0.05 parts of iron blue powder; 3 parts of high thermal conductivity additives; 2.7 parts of cosolvent No. 1; 2.7 parts of cosolvent No. 2; 0.22 parts of cosolvent No. 3; 0.32 parts of cosolvent No. 4; 0.32 parts of cosolvent No. 5; cosolvent 0.22 parts of No. 6; 0.37 parts of Thickener No. 1; 0.37 parts of Thickener No. 2; 0.6 parts of medium yellow pulp; 3.783 parts of white pulp; 0.035 parts of phthalocyanine blue pulp, 0.022 parts of phthalocyanine green pulp; 15 parts of deionized water .

The thermal conductivity of the water-based high thermal conductivity anti-corrosion paint in this embodiment is 1.149W/(m·K). Compared with the ordinary water-based top paint (0.1638 W/(m·K)), the thermal conductivity of the water-based high thermal conductivity anti-corrosion top paint is With an increase of 0.9852W/(m·K), the thermal conductivity is significantly improved.

Example 12

A formula implementation ratio, the A component includes the following raw materials in parts by mass: 50 parts by mass of water-based polyurethane resin; 0.48 parts by dispersant; 0.08 part by defoaming agent; 13 parts by titanium dioxide; 0 part by lemon yellow powder; 0 part by iron red powder; 0 parts of iron blue powder; 6 parts of high thermal conductivity additives; 2.2 parts of cosolvent No. 1; 2.2 parts of cosolvent No. 2; 0.18 parts of cosolvent No. 3; 0.28 parts of cosolvent No. 4; 0.28 parts of cosolvent No. 5; cosolvent 0.18 parts of No. 6; 0.28 parts of Thickener No. 1; 0.28 parts of Thickener No. 2; 0.15 parts of medium yellow pulp; 0.25 parts of white pulp; 0.02 parts of phthalocyanine blue pulp, 0.018 parts of phthalocyanine green pulp; 24.122 parts of deionized water .

Example 13

A formula implementation ratio, the A component includes the following raw materials in parts by mass: 53 parts by mass of water-based polyurethane resin; 0.5 part by dispersant; 0.1 part by defoaming agent; 13.5 parts by titanium dioxide; 0 part by lemon yellow powder; 0 part by iron red powder; 0 parts of iron blue powder; 4 parts of high thermal conductivity additives; 2.5 parts of cosolvent No. 1; 2.5 parts of cosolvent No. 2; 0.2 parts of cosolvent No. 3; 0.3 parts of cosolvent No. 4; 0.3 parts of cosolvent No. 5; cosolvent 0.2 parts of No. 6; 0.3 parts of Thickener No. 1; 0.3 parts of Thickener No. 2; 0 parts of medium yellow pulp; 0 parts of white pulp; 0 parts of phthalocyanine blue pulp, 0 parts of phthalocyanine green pulp; 22.3 parts of deionized water .

The above are only examples of the present application and are not used to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the pending application. within the scope of the claims.

Claims

A water-based high thermal conductivity anti-corrosion paint, the anti-corrosion paint includes component A and component B; wherein the component A includes film-forming substances, deionized water, dispersants, defoaming agents, multi-effect co-solvents, composite additives Thickener and high thermal conductivity additive; the B component includes at least one water-based curing agent and co-solvent B; the high thermal conductivity additive is a carbon-based thermal conductive material.
A water-based high thermal conductivity anti-corrosion paint as claimed in claim 1, wherein the component A further includes mineral pigments and/or color pastes.
A water-based highly thermally conductive anticorrosive paint as claimed in claim 1, wherein the carbon-based thermally conductive material includes one or a combination of one or more of carbon nanotubes, carbon nanohorns, graphene, and ultrafine graphite powder.
A water-based highly thermally conductive anti-corrosion paint as claimed in claim 1, wherein the film-forming substance is a water-based polyurethane resin.
A water-based high thermal conductive anti-corrosion paint as claimed in claim 2, wherein the mineral pigment includes: one or more of titanium dioxide, lemon yellow powder, iron red powder and iron blue powder.
A water-based high thermal conductivity anti-corrosion paint as claimed in claim 1, wherein the multi-effect co-solvent includes: film-forming aids, drying control agents, adhesion promoters and leveling agents.
A water-based highly thermally conductive anti-corrosion paint as claimed in claim 6, wherein the film-forming aid includes dipropylene glycol butyl ether or alcohol ester dodecyl film-forming aid.
A water-based highly thermally conductive anticorrosive paint as claimed in claim 7, wherein the drying control agent includes diethylene glycol monobutyl ether or propylene glycol.
A water-based high thermal conductivity anti-corrosion paint as claimed in claim 7, wherein the adhesion promoter includes silicone twin structure surfactant, polyether modified silicone oil, polyether siloxane copolymer or hydrophobic short carbon chain - One or more ethoxy compounds.
A water-based high thermal conductivity anti-corrosion paint as claimed in claim 7, wherein the leveling agent includes one of non-silicon copolymer, polyacrylate, polyether modified siloxane solution or ionic polyacrylate solution. Kind or variety.
A water-based highly thermally conductive anti-corrosion paint as claimed in claim 2, wherein the composite thickener includes: non-ionic polyurethane polymer and/or alkali-swollen acrylic associative thickener.
A water-based highly thermally conductive anti-corrosion paint as claimed in claim 1, wherein the water-based curing agent includes a polyurethane water-based curing agent.
A water-based highly thermally conductive anticorrosive paint as claimed in claim 1, wherein the co-solvent B includes propylene glycol diacetate.
A water-based highly thermally conductive anticorrosive paint as claimed in claim 4, wherein the dispersant includes: an organically modified polyacrylate containing a pigment affinity group or a block copolymer containing a pigment affinity group.
A water-based highly thermally conductive anticorrosive paint as claimed in claim 4, wherein the defoaming agent includes: polyethersiloxane copolymer emulsion.
A water-based high thermal conductivity anti-corrosion paint as claimed in claim 2, wherein the A component includes the following parts by mass of raw materials: 50-56 parts of water-based polyurethane resin; 0.48-0.52 parts of dispersant; 0.08-0.12 parts of defoaming agent parts; 1 to 6 parts of high thermal conductivity additives; 5.32 to 6.48 parts of multi-effect cosolvent; complex 0.56 to 0.74 parts of combined thickener; 0 to 19.357 parts of mineral pigments and/or color pastes; 15 to 25 parts of deionized water.
A water-based high thermal conductivity anti-corrosion paint as claimed in claim 16, wherein the multi-effect co-solvent includes the following parts by mass of raw materials: 2.2 to 2.7 parts of film-forming aid; 2.2 to 2.7 parts of drying control agent; adhesion promotion 0.46~0.54 parts of leveling agent; 0.46~0.54 parts of leveling agent.
A production method of water-based high thermal conductivity anti-corrosion paint, used to produce the water-based high thermal conductivity anti-corrosion paint as described in any one of claims 1-17, the method includes the preparation of component A and the preparation of component B;

The preparation of the A component includes: preparing a film-forming material and stirring evenly; adding a high thermal conductivity additive in proportion to the film-forming material and stirring to obtain a uniformly mixed dispersion, and introducing the dispersion into a grinder and grinding it to a desired temperature. Below the specified fineness, then add multi-effect co-solvent and composite thickener under stirring and stir evenly;

The preparation of component B includes: adding the cosolvent B to the water-based curing agent and stirring evenly.