Environment-friendly water-based high-temperature resistant paint, preparation method and application thereof

Abstract

The application provides an environment-friendly water-based high-temperature-resistant paint and a preparation method and application thereof, and the environment-friendly water-based high-temperature-resistant paint comprises the following components in parts by weight: water-based organic silicon resin, 65-68 parts; color paste, 25-30 parts; anti-settling agent A, 2-3 parts; anti-flash rust agent, 0.5-1 part; epoxy phosphate, 0.6-1 part; wetting agent, 0.1-0.3 part; defoaming agent A, 0.1-0.3 part; thickening agent, 1-2 parts; the color paste comprises the following components in parts by weight: dispersant, 1-2 parts; rheological auxiliary agent, 1-2 parts; anti-settling agent B, 0.1-2 parts; defoaming agent B, 0.1-0.5 part; glass powder, 18-22 parts; mica powder, 5-10 parts; copper-chromium black, 15-18 parts; zinc phosphate, 8-10 parts; and the balance is water. The application provides a water-based system high-temperature-resistant and anticorrosive coating which is low in VOC, energy-saving, environment-friendly and safe in construction, and the environment-friendly water-based high-temperature-resistant paint not only has high adhesion, but also has excellent high-temperature resistance, sudden cooling resistance, smoke resistance and the like.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and in particular to an environmentally friendly water-based high-temperature resistant paint, its preparation method, and its application. Background Technology

[0002] High-temperature resistant paint is a special type of functional coating. Its coating maintains its performance and stability in high-temperature environments, extending the service life of equipment. It is widely used in aerospace, new energy vehicles, petroleum metallurgy, electrical equipment and other fields.

[0003] Policies implemented in the high-temperature resistant industry restrict the expansion of outdated production capacity, raise requirements for improving product quality and technology, and encourage technological upgrades to promote green development. Therefore, traditional solvent-based high-temperature resistant paints will gradually be replaced by environmentally friendly high-temperature resistant paints.

[0004] With the development of aerospace technology, industrial upgrading, and the popularization of new energy vehicles, the demand for high-temperature resistant paints is constantly increasing. More importantly, the international standards for traditional solvent-based high-temperature resistant coatings have created technical barriers, limiting the development of enterprises. Therefore, developing environmentally friendly high-temperature resistant paints to break through the technical barriers of international high-temperature resistant standards is of great significance. Summary of the Invention

[0005] The purpose of this invention is to provide an environmentally friendly water-based high-temperature resistant paint, its preparation method, and its application, which can at least solve one of the above-mentioned problems.

[0006] According to one aspect of the present invention, an environmentally friendly water-based high-temperature resistant paint is provided, comprising the following components in parts by weight:

[0007] Water-based silicone resin, 65-68 parts;

[0008] Color paste, 25-30 parts;

[0009] Anti-settling agent A, 2-3 parts;

[0010] Anti-flash rust agent, 0.5-1 part;

[0011] Epoxyphosphate, 0.6-1 part;

[0012] Wetting agent, 0.1-0.3 parts;

[0013] Defoamer A, 0.1-0.3 parts;

[0014] Thickener, 1-2 parts;

[0015] The color paste comprises the following components by weight:

[0016] Dispersant, 1-2 parts;

[0017] Rheology modifier, 1-2 parts;

[0018] Anti-settling agent B, 0.1-2 parts;

[0019] Defoamer B, 0.1-0.5 parts;

[0020] Glass powder, 18-22 parts;

[0021] Mica powder, 5-10 parts;

[0022] Copper chrome black, 15-18 parts;

[0023] Zinc phosphate, 8-10 parts;

[0024] The remainder is water.

[0025] In some embodiments, the water-based silicone resin is 67 parts, the color paste is 26-29 parts, the anti-settling agent A is 2.7 parts, the flash rust inhibitor is 0.6-1 parts, the epoxy phosphate ester is 0.6-1 parts, the wetting agent is 0.2 parts, the defoamer A is 0.1 parts, and the thickener is 1.3 parts.

[0026] In some embodiments, the color paste is 27.5 parts, the flash rust inhibitor is 0.6 parts, and the epoxy phosphate ester is 0.6 parts.

[0027] In some embodiments, the color paste comprises the following components in parts by weight:

[0028] Water, 43.8 parts;

[0029] Dispersant, 2 parts;

[0030] Rheology modifier, 1.5 parts;

[0031] Anti-settling agent B, 0.2 parts;

[0032] Defoamer B, 0.2 parts;

[0033] Glass powder, 20 parts;

[0034] Mica powder, 8 parts;

[0035] Copper chrome black, 16 parts;

[0036] Zinc phosphate, 8.3 parts.

[0037] In some embodiments, the glass powder is glass powder that begins to melt at 350°C.

[0038] In some implementations, the water is deionized water.

[0039] According to another aspect of the present invention, a method for preparing an environmentally friendly water-based high-temperature resistant paint is also provided, characterized by comprising at least the following steps:

[0040] S1. Preparation of color paste:

[0041] First, add water, dispersant, rheology modifier, anti-settling agent B and defoamer to the mixing equipment in sequence and stir for 5 minutes. Then add glass powder, mica powder, copper chromate black and zinc phosphate and stir for another 45 minutes. Set aside for later use.

[0042] S2. Preparation of environmentally friendly water-based high-temperature resistant paint:

[0043] Add water-based silicone resin, color paste prepared in step S1, anti-settling agent A, anti-flash rust agent, epoxy phosphate ester, wetting agent, defoamer A and thickener in sequence to a mixing device, disperse and stir evenly, adjust the viscosity to 80Ku, and then filter through a 200-mesh filter to obtain an environmentally friendly water-based high-temperature resistant paint.

[0044] In some embodiments, in step S1, the speed of the stirring device is first controlled at 1000 r / min, and then water, dispersant, rheology modifier, anti-settling agent B and defoamer B are added to the stirring device in sequence. After stirring for 5 minutes, the speed of the stirring device is controlled at 1500 r / min, and then glass powder, mica powder, copper chromate black and zinc phosphate are added, and then stirred for another 45 minutes.

[0045] In some embodiments, in step S2, the rotation speed of the stirring device is controlled at 1500 r / min, and the stirring time is 30 min.

[0046] According to another aspect of the present invention, an application of an environmentally friendly water-based high-temperature resistant paint is also provided, characterized in that the environmentally friendly water-based high-temperature resistant paint prepared by the above-described preparation method is suitable for surface treatment of mechanical equipment, and the specific application method includes the following steps:

[0047] A. Before spraying, the surface of the equipment should be degreased and derusted;

[0048] B. Apply environmentally friendly water-based high-temperature resistant paint to the equipment surface by spraying, with the paint film thickness controlled at 35-50μm;

[0049] C. Bake at 200-280℃ for 15-60 minutes to cure.

[0050] The beneficial effects of this invention are:

[0051] This invention provides a low-VOC, energy-saving, environmentally friendly, and safe water-based high-temperature and anti-corrosion coating. This environmentally friendly water-based high-temperature resistant paint reacts low-melting-point glass powder with silicone resin at 350°C to form a refractory substance that isolates oxygen, thereby forming a high-density, high-temperature resistant, yellowing-resistant, and acid-alkali resistant glassy coating within the resin paint. The main function of epoxy phosphate ester is to improve the adhesion of the coating to metal surfaces, enhance the water resistance, salt spray resistance, and flexibility of the coating film, and improve gloss and hardness. The role of mica powder in water-based silicone resin paint mainly includes barrier function, improving the physical and mechanical properties of the paint film, enhancing the wear resistance of the paint film, providing insulation, flame retardancy, UV and infrared resistance, and sound insulation and vibration damping. Copper chromate black plays a crucial role in water-based silicone resin paint, mainly due to its excellent heat resistance, light resistance, chemical resistance, and excellent hiding power. Zinc phosphate in the color paste mainly acts as an anti-rust pigment, providing excellent anti-rust performance and water resistance. Tests have shown that it not only has strong adhesion, but also excellent resistance to high temperatures, sudden cooling, and smoke. Detailed Implementation

[0052] The present invention will now be described in further detail.

[0053] The environmentally friendly water-based high-temperature resistant paint of the present invention comprises the following components in parts by weight:

[0054] Water-based silicone resin, 65-68 parts;

[0055] Color paste, 25-30 parts;

[0056] Anti-settling agent A, 2-3 parts;

[0057] Anti-flash rust agent, 0.5-1 part;

[0058] Epoxyphosphate, 0.6-1 part;

[0059] Wetting agent, 0.1-0.3 parts;

[0060] Defoamer A, 0.1-0.3 parts;

[0061] Thickener, 1-2 parts;

[0062] The color paste comprises the following components by weight:

[0063] Dispersant, 1-2 parts;

[0064] Rheology modifier, 1-2 parts;

[0065] Anti-settling agent B, 0.1-2 parts;

[0066] Defoamer B, 0.1-0.5 parts;

[0067] Glass powder, 18-22 parts;

[0068] Mica powder, 5-10 parts;

[0069] Copper chrome black, 15-18 parts;

[0070] Zinc phosphate, 8-10 parts;

[0071] The remainder is water.

[0072] Preferably, the water-based silicone resin comprises 67 parts, the color paste comprises 26-29 parts, the anti-settling agent A comprises 2.7 parts, the anti-flash rust agent comprises 0.6-1 parts, the epoxy phosphate ester comprises 0.6-1 parts, the wetting agent comprises 0.2 parts, the defoamer A comprises 0.1 parts, and the thickener comprises 1.3 parts.

[0073] Further preferred, the color paste is 27-28 parts, the flash rust inhibitor is 0.6 parts, and the epoxy phosphate ester is 0.6 parts.

[0074] Preferably, the glass powder is glass powder that begins to melt at 350°C.

[0075] Deionized water is preferred.

[0076] Preferably, the waterborne silicone resin used is FNMT3003 waterborne silicone resin manufactured by Zhangjiagang Nuotu Chemical Technology Co., Ltd.; anti-settling agent A and anti-settling agent B are the same, both using BENTONE LT waterborne rheology modifier from Haimingside, which is a rheology modifier made of modified montmorillonite clay; the flash rust inhibitor is Tech-8387 flash rust inhibitor produced by Shanghai Taige Polymer Technology Co., Ltd.; the wetting agent is Twin 4100 wetting agent for Digo substrates; defoamer A is BYK024 defoamer from BYK; the thickener is DeuRheo WT-105A waterborne coating thickener from Haimingside; the dispersant is BYK190 dispersant from BYK; and the rheology modifier is BYK420 rheology modifier from BYK.

[0077] This invention provides a low-VOC, energy-saving, environmentally friendly, and safe water-based high-temperature and anti-corrosion coating. This environmentally friendly water-based high-temperature resistant paint reacts low-melting-point glass powder with silicone resin at 350°C to form a refractory substance that isolates oxygen, thereby forming a high-density, high-temperature resistant, yellowing-resistant, and acid-alkali resistant glassy coating within the resin paint. The main function of epoxy phosphate ester is to improve the adhesion of the coating to metal surfaces, enhance the water resistance, salt spray resistance, and flexibility of the coating film, and improve gloss and hardness. The role of mica powder in water-based silicone resin paint mainly includes barrier function, improving the physical and mechanical properties of the paint film, enhancing the wear resistance of the paint film, providing insulation, flame retardancy, UV and infrared resistance, and sound insulation and vibration damping. Copper chromate black plays a crucial role in water-based silicone resin paint, mainly due to its excellent heat resistance, light resistance, chemical resistance, and excellent hiding power. Zinc phosphate in the color paste mainly acts as an anti-rust pigment, providing excellent anti-rust performance and water resistance. Tests have shown that it not only has strong adhesion, but also excellent resistance to high temperatures, sudden cooling, and smoke.

[0078] This invention also discloses a method for preparing the above-mentioned environmentally friendly water-based high-temperature resistant paint, which includes at least the following steps:

[0079] S1. Preparation of color paste:

[0080] First, add water, dispersant, rheology modifier, anti-settling agent B and defoamer B to the mixing equipment in sequence and stir for 5 minutes. Then add glass powder, mica powder, copper chromate black and zinc phosphate and stir for another 45 minutes. Set aside for later use.

[0081] S2. Preparation of environmentally friendly water-based high-temperature resistant paint:

[0082] Add water-based silicone resin, color paste prepared in step S1, anti-settling agent A, anti-flash rust agent, epoxy phosphate ester, wetting agent, defoamer A and thickener in sequence to a mixing device, disperse and stir evenly, adjust the viscosity to 80Ku, and then filter through a 200-mesh filter to obtain an environmentally friendly water-based high-temperature resistant paint.

[0083] In some embodiments, in step S1, the speed of the stirring device is first controlled at 1000 r / min, and then water, dispersant, rheology modifier, anti-settling agent B and defoamer B are added to the stirring device in sequence. After stirring for 5 minutes, the speed of the stirring device is controlled at 1500 r / min, and then glass powder, mica powder, copper chromate black and zinc phosphate are added, and then stirred for another 45 minutes.

[0084] In some embodiments, in step S2, the rotation speed of the stirring device is controlled at 1500 r / min, and the stirring time is 30 min.

[0085] This invention also discloses an application of the environmentally friendly water-based high-temperature resistant paint prepared by the above-described method. This environmentally friendly water-based high-temperature resistant paint is suitable for surface treatment of mechanical equipment. The specific application method includes the following steps:

[0086] A. Before spraying, the surface of the equipment should be degreased and derusted;

[0087] B. Apply environmentally friendly water-based high-temperature resistant paint to the equipment surface by spraying, with the paint film thickness controlled at 35-50μm;

[0088] C. Bake at 200-280℃ for 15-60 minutes to cure.

[0089] The present invention is further illustrated below by way of embodiments, but the invention is not limited to the scope of the embodiments described herein. Experimental methods in the following embodiments that do not specify specific conditions were performed according to conventional methods and conditions, or as selected according to the product instructions.

[0090] Example 1

[0091] This embodiment provides an environmentally friendly water-based high-temperature resistant paint. The specific components and proportions of this environmentally friendly water-based high-temperature resistant paint are shown in Table 1 below:

[0092] Table 1: Formulation table of environmentally friendly water-based high-temperature resistant paint in Example 1

[0093] Waterborne silicone resin 67 Pigment 27.5 Anti-settling agent A 2.7 Anti-flash rust agent 0.6 Epoxyphosphate 0.6 wetting agent 0.2 Defoamer A 0.1 Thickener 1.3

[0094] The specific components and proportions of the color paste in the aforementioned environmentally friendly water-based high-temperature resistant paint are shown in Table 2 below:

[0095] Table 2: Proportioning Table of Colorant in Example 1

[0096] dispersant 2 rheology modifiers 1.5 Anti-settling agent B 0.2 Defoamer B 0.2 glass powder 20 mica powder 8 Copper Chromium Black 16 Zinc phosphate 8.3 water 43.8

[0097] Based on the proportions in Table 1-2 above, the above-mentioned environmentally friendly water-based high-temperature resistant paint is prepared by the following method, specifically including the following steps:

[0098] S1. Preparation of color paste:

[0099] First, control the speed of the mixing equipment to 1000 r / mm i nThen, add 43.8 parts of water, 2 parts of dispersant, 1.5 parts of rheology modifier, 0.2 parts of anti-settling agent B, and 0.2 parts of defoamer B to the mixing equipment in sequence. After mixing for 5 minutes, control the speed of the mixing equipment at 1500 r / min. Then add 20 parts of glass powder, 8 parts of mica powder, 16 parts of copper chromium black, and 8.3 parts of zinc phosphate. Stir for another 45 minutes and set aside. Check for precipitation and any abnormalities.

[0100] S2. Preparation of environmentally friendly water-based high-temperature resistant paint:

[0101] Add 67 parts of water-based silicone resin, 27.5 parts of the color paste prepared in step S1, 2.7 parts of anti-settling agent A, 0.6 parts of anti-flash rust agent, 0.6 parts of epoxy phosphate ester, 0.2 parts of wetting agent, 0.1 parts of defoamer A, and 1.3 parts of thickener to a mixing device in sequence, disperse and stir evenly, and adjust the viscosity to 80K. u Then, after filtering through a 200-mesh filter, an environmentally friendly water-based high-temperature resistant paint is obtained.

[0102] Example 2

[0103] This embodiment provides another environmentally friendly water-based high-temperature resistant paint. The specific components and proportions of this environmentally friendly water-based high-temperature resistant paint are shown in Table 3 below:

[0104] Table 3: Formulation table of environmentally friendly water-based high-temperature resistant paint in Example 2

[0105] Waterborne silicone resin 67 Pigment 28 Anti-settling agent A 2.2 Anti-flash rust agent 0.6 Epoxyphosphate 0.6 wetting agent 0.2 Defoamer A 0.1 Thickener 1.3

[0106] The specific components and proportions of the color paste in the aforementioned environmentally friendly water-based high-temperature resistant paint are shown in Table 4 below:

[0107] Table 4: Proportioning Table of Colorant in Example 2

[0108] dispersant 2 rheology modifiers 1.5 Anti-settling agent B 0.2 Defoamer B 0.2 glass powder 21 mica powder 7.3 Copper Chromium Black 15 Zinc phosphate 9 water 43.8

[0109] Based on the proportioning table in Table 3-4 above, the above-mentioned environmentally friendly water-based high-temperature resistant paint is prepared by the following method, specifically including the following steps:

[0110] S1. Preparation of color paste:

[0111] First, control the stirring speed of the equipment at 1000 r / min. Then, add 43.8 parts of water, 2 parts of dispersant, 1.5 parts of rheology modifier, 0.2 parts of anti-settling agent B, and 0.2 parts of defoamer B to the equipment in sequence. Stir for 5 minutes. Then, control the stirring speed of the equipment at 1500 r / min. Next, add 21 parts of glass powder, 7.3 parts of mica powder, 15 parts of copper chromate black, and 9 parts of zinc phosphate. Stir for another 45 minutes and set aside. Check for precipitation and any abnormalities.

[0112] S2. Preparation of environmentally friendly water-based high-temperature resistant paint:

[0113] Add 67 parts of water-based silicone resin, 28 parts of color paste prepared in step S1, 2.2 parts of anti-settling agent A, 0.6 parts of anti-flash rust agent, 0.6 parts of epoxy phosphate ester, 0.2 parts of wetting agent, 0.1 parts of defoamer A, and 1.3 parts of thickener to a mixing device in sequence, disperse and stir evenly, adjust the viscosity to 80Ku, and then filter through a 200-mesh filter to obtain an environmentally friendly water-based high-temperature resistant paint.

[0114] Example 3

[0115] The environmentally friendly water-based high-temperature resistant paints prepared in Examples 1 and 2 above were applied to a test metal plate (test plate) according to the application method described above. The performance of the environmentally friendly water-based high-temperature resistant paints prepared in Examples 1 and 2 above was tested using known national standard methods. Specifically, the test items included curing conditions, state in the container, anti-decarburization performance, cross-cut test, heat resistance, salt spray resistance, rapid cooling resistance, and coating peeling performance. The specific test standards and test methods are shown in Table 5 below:

[0116] Table 5: Test Items and Their Test Standards or Test Methods

[0117]

[0118] Based on the test standards and methods in Table 5, the performance test results of the environmentally friendly water-based high-temperature resistant paints in Examples 1 and 2 are shown in Table 6 below:

[0119] Table 6: Performance Test Table of Environmentally Friendly Waterborne High-Temperature Resistant Paints in Examples 1 and 2

[0120]

[0121] According to the above data, the environmentally friendly water-based high-temperature resistant paint of the present invention not only has the advantages of good anti-decarburization performance and good adhesion, but also has excellent heat resistance, salt spray resistance and rapid cooling resistance.

[0122] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. An environmentally friendly water-based high-temperature resistant paint, characterized in that, Includes the following components by weight: Water-based silicone resin, 65-68 parts; Color paste, 25-30 parts; Anti-settling agent A, 2-3 parts; Anti-flash rust agent, 0.5-1 part; Epoxyphosphate, 0.6-1 part; Wetting agent, 0.1-0.3 parts; Defoamer A, 0.1-0.3 parts; Thickener, 1-2 parts; The color paste comprises the following components in parts by weight: Dispersant, 1-2 parts; Rheology modifier, 1-2 parts; Anti-settling agent B, 0.1-2 parts; Defoamer B, 0.1-0.5 parts; Glass powder, 18-22 parts; Mica powder, 5-10 parts; Copper chrome black, 15-18 parts; Zinc phosphate, 8-10 parts; The remainder is water; The glass powder is glass powder that begins to melt at 350℃.

2. The environmentally friendly water-based high-temperature resistant paint according to claim 1, characterized in that, The water-based silicone resin comprises 67 parts, the color paste comprises 26-29 parts, the anti-settling agent A comprises 2.7 parts, the anti-flash rust agent comprises 0.6-1 parts, the epoxy phosphate ester comprises 0.6-1 parts, the wetting agent comprises 0.2 parts, the defoamer A comprises 0.1 parts, and the thickener comprises 1.3 parts.

3. The environmentally friendly water-based high-temperature resistant paint according to claim 2, characterized in that, The color paste is 27.5 parts, the anti-flash rust agent is 0.6 parts, and the epoxy phosphate ester is 0.6 parts.

4. The environmentally friendly water-based high-temperature resistant paint according to claim 1, characterized in that, The color paste comprises the following components in parts by weight: Water, 43.8 parts; Dispersant, 2 parts; Rheology modifier, 1.5 parts; Anti-settling agent B, 0.2 parts; Defoamer B, 0.2 parts; Glass powder, 20 parts; Mica powder, 8 parts; Copper chrome black, 16 parts; Zinc phosphate, 8.3 parts.

5. The environmentally friendly water-based high-temperature resistant paint according to claim 1, characterized in that, The water is deionized water.

6. A method for preparing an environmentally friendly water-based high-temperature resistant paint as described in any one of claims 1-5, characterized in that, At least the following steps are included: S1. Preparation of color paste: First, add water, dispersant, rheology modifier, anti-settling agent B and defoamer B to the mixing equipment in sequence and stir for 5 minutes. Then add glass powder, mica powder, copper chromate black and zinc phosphate and stir for another 45 minutes. Set aside for later use. S2. Preparation of environmentally friendly water-based high-temperature resistant paint: Add water-based silicone resin, color paste prepared in step S1, anti-settling agent A, anti-flash rust agent, epoxy phosphate ester, wetting agent, defoamer A and thickener in sequence to a mixing device, disperse and stir evenly, adjust the viscosity to 80Ku, and then filter through a 200-mesh filter to obtain an environmentally friendly water-based high-temperature resistant paint.

7. The preparation method of the environmentally friendly water-based high-temperature resistant paint according to claim 6, characterized in that, In step S1, the speed of the stirring equipment is first controlled at 1000 r / min, and then water, dispersant, rheology modifier, anti-settling agent B and defoamer B are added to the stirring equipment in sequence. After stirring for 5 minutes, the speed of the stirring equipment is controlled at 1500 r / min, and then glass powder, mica powder, copper chromate black and zinc phosphate are added, and then stirred for 45 minutes.

8. The preparation method of the environmentally friendly water-based high-temperature resistant paint according to claim 6, characterized in that, In step S2, the speed of the stirring device is controlled at 1500 r / min, and the stirring time is 30 min.

9. The application of an environmentally friendly water-based high-temperature resistant paint, characterized in that, The environmentally friendly water-based high-temperature resistant paint prepared by the method described in any one of claims 6-8 is suitable for surface treatment of mechanical equipment. The specific application method includes the following steps: A. Before spraying, the surface of the equipment should be degreased and derusted; B. Apply environmentally friendly water-based high-temperature resistant paint to the equipment surface by spraying, with the paint film thickness controlled at 35-50μm; C. Bake at 200-280℃ for 15-60 minutes to cure.

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