Water-based dip-coating paint for mine chain and preparation method of water-based dip-coating paint

Abstract

The invention relates to the technical field of paint, and provides water-based dip-coating paint for a mine chain and a preparation method of the water-based dip-coating paint. The water-based dip-coating paint for the mine chain is prepared from the following components in parts by weight: 10 to 15 parts of epoxy ester resin, 0.5 to 1 part of neutralizer, 1 to 2 parts of diluent, 0.1 to 0.5 part of drier, 1 to 1.5 parts of dispersant, 0.3 to 1.3 parts of wetting agent, 0.2 to 0.6 part of defoaming agent, 2 to 8 parts of tinting pigment, 5 to 10 parts of antirust pigment, 10 to 20 parts of filler, 1 to 2 parts of rheological additive, 25 to 40 parts of emulsion, 2 to 5 parts of cosolvent, 0.2 to 1 part of flash rust inhibitor, 0.2 to 1 part of flatting agent, 1 to 3 parts of thickening agent and 16 to 20 parts of water. And the anti-rust pigment is zinc phosphate, aluminum zinc phosphate, ion exchange type anti-rust pigment and composite anti-rust pigment. According to the technical scheme, the problems of non-uniform paint hanging and poor corrosion resistance of a paint film in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, and in particular to a water-based dipping paint for mining chains and a preparation method thereof. Background Art

[0002] As an important component of mechanical transmission and material transportation, chains are widely used in various industrial fields.

[0003] The production of mining chains is a complex and meticulous process involving multiple key steps and techniques. Mining chains are typically made from high-strength alloy steels such as 23MnNiMoCr54, 30CrMnTi, and 25MnV. These materials offer high strength, hardness, and excellent wear and impact resistance, making them suitable for the harsh mining environment. To further enhance the chain's corrosion resistance and service life, surface treatments such as galvanizing, painting, and electroplating are often applied.

[0004] Mining chains have complex structures with numerous gaps and corners. The numerous gaps between rail segments and the complex external structure make spray coating difficult to fully cover. Therefore, dip coating is often used. Dip coating ensures that these areas are fully covered while minimizing paint waste. During the dip coating process, excess paint naturally drips back into the dip tank, eliminating waste. This not only reduces production costs but also improves paint utilization efficiency. Dip coating creates a uniform coating, delivering high-quality films even on large and complex shapes. By controlling parameters such as dipping time, paint viscosity, and removal speed, a uniform and consistent coating can be ensured.

[0005] Water-based dip coatings use water instead of organic solvents as a dispersion medium, offering advantages such as low flammability, low odor, easy application, and wide application. This not only meets environmental requirements but also reduces environmental pollution. However, current water-based dip coatings are prone to uneven coating at edges, low film thickness, poor wear resistance, and insufficient film flexibility at chain links, leading to coating cracking and paint dripping on the bottom of vertical chain surfaces. Therefore, a water-based dip coating with uniform coating, excellent mechanical properties, and corrosion resistance is urgently needed. Summary of the Invention

[0006] The present invention provides a water-based dipping paint for mining chains and a preparation method thereof, which solves the problems of uneven paint application and poor corrosion resistance of the paint film in the related art.

[0007] The technical solutions of the present invention are as follows: The present invention provides a water-based dip coating for mining chains and a preparation method thereof, which is characterized by comprising the following components in parts by weight: 10-15 parts of epoxy ester resin, 0.5-1 part of neutralizing agent, 1-2 parts of diluent, 0.1-0.5 part of drier, 1-1.5 parts of dispersant, 0.3-1.3 parts of wetting agent, 0.2-0.6 parts of defoamer, 2-8 parts of coloring pigment, 5-10 parts of anti-rust pigment, 10-20 parts of filler, 1-2 parts of rheological additive, 25-40 parts of emulsion, 2-5 parts of cosolvent, 0.2-1 part of anti-flash rust inhibitor, 0.2-1 part of leveling agent, 1-3 parts of thickener, 16-20 parts of water; The anti-rust pigment is zinc phosphate, aluminum zinc phosphate, ion exchange type anti-rust pigment and composite type anti-rust pigment. As a further technical solution, the epoxy ester resin is a water-based acrylic acid modified epoxy resin with a solid content of ≥70% and a viscosity of ≤20000 mPa.s; The neutralizing agent is dimethylethanolamine; The diluent is any one of ethylene glycol butyl ether, propylene glycol methyl ether and dipropylene glycol methyl ether.

[0008] As a further technical solution, the drying agent is a high-efficiency composite drying agent containing carboxylates of metals such as cobalt, manganese, lead, zinc, and calcium and a compounded high-efficiency accelerator, including CQ88A; The dispersant is a highly efficient low molecular weight polymer dispersant with sulfonic acid and carboxylic acid groups and low molecular weight sulfonyl fluoride vinyl ether, including D72; The wetting agent is an acetylenic diol nonionic surfactant, including 104E; The defoaming agent is a foam suppressing defoaming agent prepared by mixing organically modified polydimethylsiloxane and hydrophobic particles, including AFCONA-2507.

[0009] As a further technical solution, the coloring pigment is a black pigment and / or a yellow pigment; The black pigment includes one or more of carbon black, aniline black, and iron black; The yellow pigment includes one or more of Pigment Yellow 183 and Iron Oxide Yellow; The filler is one or more of mica powder, talc powder, and barium sulfate; The rheological additives are attapulgite, fumed silica and polyamide wax; The emulsion is a commonly used water-based acrylic emulsion, including Wantipro 0616; The cosolvent is one or more of ethylene glycol butyl ether, propylene glycol methyl ether, and alcohol ester 12.

[0010] As a further technical solution, the anti-flash rust inhibitor includes ED-615F; The leveling agent is a polyurethane leveling agent, and the model of the polyurethane leveling agent includes ACRYSOL RM-2020; The thickener is a polyurethane thickener, and the polyurethane thickener model includes SN-612.

[0011] As a further technical solution, the anti-rust pigment is specifically composed of the following components in percentage by mass: 5% to 10% zinc phosphate, 3% to 5% aluminum zinc phosphate, 1% to 5% ion exchange anti-rust pigment, and the rest is composite anti-rust pigment; The mass ratio of the mica powder, talc powder and precipitated barium sulfate is 1:1:1-3; The mass ratio of the attapulgite, fumed silica and polyamide wax is 1:1:0.2-0.3.

[0012] As a further technical solution, the following components are also included in parts by weight: 3 to 6 parts of corrosion-resistant additive; The corrosion-resistant additive is graphene oxide-coated zeolite and / or graphene oxide-coated carbon fiber.

[0013] As a further technical solution, the preparation method of the graphene oxide-coated zeolite is as follows: placing the zeolite in a 0.5-0.6 mol / L NaOH solution, stirring at 70-80° C., washing with water, and drying to obtain a pretreated zeolite; placing the pretreated zeolite in an ethanol-water solution of a silane coupling agent, stirring at 70-80° C., filtering, washing, and drying to obtain a secondary treated zeolite; dispersing the graphene oxide in water, ultrasonicating, placing the secondary treated zeolite, stirring at 70-80° C., and filtering and drying to obtain the graphene oxide-coated zeolite; The preparation method of the graphene oxide-coated carbon fiber comprises: dispersing the carbon fiber in water containing a cationic surfactant, ultrasonically stirring, washing, and drying to obtain pretreated carbon fiber; dispersing the pretreated carbon fiber in water, and dropwise adding a 4-5 mg / mL graphene oxide aqueous solution to obtain the graphene oxide-coated carbon fiber.

[0014] In the present invention, graphene oxide-coated zeolite and / or graphene oxide-coated carbon fiber are used as corrosion-resistant additives. Zeolite as a nanofiller can fill the gaps in the resin film, making the paint film denser. The carbon fiber itself has good corrosion resistance, but the zeolite and carbon fiber have poor dispersibility in the resin and unsatisfactory bonding performance with the resin matrix. The surface of graphene oxide has rich oxygen-containing groups and good compatibility with the resin. Coating the surface of zeolite and carbon fiber with graphene oxide can effectively improve the dispersibility of zeolite and carbon fiber in the resin, reduce the defects of the paint film, and improve the isolation effect of the paint film, thereby significantly improving the corrosion resistance of the paint film.

[0015] As a further technical solution, the mass volume ratio of the zeolite and the NaOH solution is 10g:100~200mL; The ethanol-water solution comprises ethanol and water, and the volume ratio of the silane coupling agent, ethanol and water is 1:3:5-6; The mass volume ratio of the pretreated zeolite and the ethanol-water solution containing the silane coupling agent is 8 g:150-200 mL; The volume ratio of the graphene oxide, the secondary treated zeolite and water is 0.2-0.3 g:1 g:150 mL; The mass volume ratio of the carbon fiber, cationic surfactant and water is 10g:0.5g:80-100mL; The mass volume ratio of the pretreated carbon fiber, the graphene oxide aqueous solution and water is 2g:5mL:50~60mL.

[0016] As a further technical solution, a method for preparing a water-based dip coating for a mining chain is provided, which is used to prepare a water-based dip coating for a mining chain according to any one of claims 1 to 9, and is characterized in that it comprises the following steps: The epoxy ester resin is mixed with a neutralizer, a diluent and a drying agent, and then water, a dispersant, a wetting agent, a defoaming agent, a coloring pigment, an anti-rust filler, a filler and a rheological additive are added. After stirring, the remaining components of the water-based dip paint are added at 300-600 rpm to control the final viscosity to 70-80 ku to obtain a water-based dip paint for mining chains.

[0017] The working principle and beneficial effects of the present invention are: 1. In the present invention, zinc phosphate and aluminum zinc phosphate can react chemically with the rust on the metal surface to form a stable complex, providing basic rust prevention performance. The use of ion exchange anti-rust pigments further enhances the corrosion resistance and salt spray resistance.

[0018] 2. In the present invention, attapulgite, fumed silica and polyamide wax are used in conjunction with a leveling agent to provide the coating with higher rheological properties. Attapulgite has high thixotropy, which can prevent the paint film from sagging and the paint from splashing during coating, which is conducive to building a thick layer of paint, improving hiding power, and solving the problem of less paint hanging on the edges; attapulgite and fumed silica work synergistically to achieve thickening, thixotropy, anti-settling and suspension effects in the water-based paint system, effectively improving the anti-settling effect; polyamide wax forms a strong network structure in the coating, enhances the surface performance and smooth feel, and improves the anti-stick and wear resistance of the paint film. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0020] In the following embodiments and comparative examples, the epoxy ester resin used is model WA-6069, manufactured by Shandong Keyao Chemical Co., Ltd.; the ion exchange anti-rust pigment is model ECO 301, manufactured by Shanghai Yuansu Chemical Technology Co., Ltd.; the composite anti-rust pigment is model HJ606, manufactured by Henan Taihe Huijin Powder Technology Co., Ltd.; the silane coupling agent used is KH550; the zeolite is model FS, manufactured by Lingshou County Baixin New Material Technology Co., Ltd., the carbon fiber is model 3232, manufactured by Jiangxi Shuobang New Material Technology Co., Ltd.; the graphene oxide is model MPGO-4210, manufactured by Mo Rui Technology.

[0021] Example 1 A method for preparing a water-based dip coating for a mining chain comprises the following steps: S1. First, add 10 parts of epoxy ester resin to the mixing tank and start stirring. While stirring, add 0.5 parts of dimethylethanolamine, 1 part of ethylene glycol butyl ether and 0.3 parts of CQ88A in sequence. After adding, stir at high speed (speed above 700 rpm) for at least 10 minutes. After fully mixing with the resin, add 10 parts of deionized water in batches of at least three times. After diluting the resin, add 1.5 parts of D72, 0.1 parts of 104E, 0.2 parts of AFCONA-2507 and 3 parts of carbon black. 5 parts of anti-rust pigment (composed of the following components in percentage by mass: 5% zinc phosphate, 3% aluminum zinc phosphate, 1% ion exchange anti-rust pigment, and the rest are composite anti-rust pigments), 5 parts of mica powder, 5 parts of talc powder, 5 parts of precipitated barium sulfate, and 1.5 parts of rheological additive (wherein the mass ratio of attapulgite, fumed silica, and polyamide wax is 1:1:0.2) are mixed until the materials are evenly dispersed without obvious large lumps of powder. Stir at high speed for at least 15 minutes and grind. Adjust the viscosity of the vehicle with 3.3 parts of water; S2, grinding process: vehicle temperature ≤ 50 ℃, adjust the top water volume with 2.7 parts of water, fineness ≤ 35μm; S3. Color adjustment and dilution process: under medium speed stirring of 300-600 rpm, add 40 parts of Wantipro 0616, 4 parts of ethylene glycol butyl ether, 0.5 parts of TEGO Twin 4100, 0.2 parts of AFCONA-2508, 1 part of ED-615F, 1 part of SN-612, 0.5 parts of ACRYSOL RM-2020, etc. in sequence. Before thickening, it is necessary to dilute it in advance for use. The final viscosity is controlled at 70ku and the temperature is 24℃. The color is observed on the temperature spray plate. The dry film thickness is 25μm. The gloss is tested according to the dry film thickness of 20μm on the tinplate spray plate (if the spray plate is not required, the plate should be brushed). Drying method: air drying, and the visual color is similar.

[0022] Example 2 A method for preparing a water-based dip coating for a mining chain comprises the following steps: S1. First, add 13.5 parts of epoxy ester resin into the mixing tank and start stirring. While stirring, add 0.65 parts of dimethylethanolamine, 1 ethylene glycol butyl ether and 0.4 parts of CQ88A in sequence. After adding, stir at high speed (speed above 700 rpm) for at least 10 minutes. After fully mixing with the resin, add 12 parts of deionized water in batches of at least three times. After diluting the resin, add 1.2 parts of D72, 0.2 parts of 104E, 0.2 parts of AFCONA-2507 and 3 parts of Pigment Yellow 183. 7.5 parts of anti-rust pigment (composed of the following components in percentage by mass: 8% zinc phosphate, 4% aluminum zinc phosphate, 3% ion exchange anti-rust pigment, and the rest are composite anti-rust pigments), 2 parts of mica powder, 2 parts of talc powder, 6 parts of precipitated barium sulfate, and 1.5 parts of rheological additive (wherein the mass ratio of attapulgite, fumed silica, and polyamide wax is 1:1:0.2). Mix until the materials are evenly dispersed without obvious large lumps of powder. Stir at high speed for at least 15 minutes and grind. Adjust the viscosity of the vehicle with 2.8 parts of water; S2, grinding process: machine temperature ≤ 50 ℃, use 2.2 parts of water to adjust the top water volume, fineness ≤ 35μm; S3. Color adjustment and dilution process: under medium speed stirring of 300-600 rpm, add 40 parts of Wantipro 0616, 4 parts of ethylene glycol butyl ether, 0.5 parts of TEGO Twin 4100, 0.2 parts of AFCONA-2508, 1 part of ED-615F, 2 parts of SN-612, 0.5 parts of ACRYSOL RM-2020, etc. in sequence. Before thickening, it is necessary to dilute it in advance for use. The final viscosity is controlled at 80ku and the temperature is 25℃. The color is observed on the temperature spray plate. The dry film thickness is 30μm. The gloss is tested according to the dry film thickness of 23μm on the tinplate spray plate (if the spray plate is not required, the plate should be brushed). Drying method: air drying, and the visual color is similar.

[0023] Example 3 A method for preparing a water-based dip coating for a mining chain comprises the following steps: S1. First add 15 parts of epoxy ester resin into the mixing tank and start stirring. In the stirring state, add 0.75 parts of dimethylethanolamine, 1 part of ethylene glycol butyl ether and 0.5 parts of CQ88A in sequence. After adding, stir at high speed (speed above 700 rpm) for at least 10 minutes. After fully mixing with the resin, add 12 parts of deionized water in batches of at least three times. After diluting the resin, add 1 part of D72, 0.3 parts of 104E, 0.2 parts of AFCONA-2507, 1.5 parts of pigment yellow 183 and 1.5 parts of oxygen Mix ferric yellow iron, 7.5 parts of anti-rust pigment (composed of the following components in percentage by mass: 10% zinc phosphate, 5% aluminum zinc phosphate, 5% ion exchange anti-rust pigment, and the rest are composite anti-rust pigments), 5 parts of mica powder, 5 parts of talc powder, 5 parts of precipitated barium sulfate, and 1.5 parts of rheological additive (wherein the mass ratio of attapulgite, fumed silica, and polyamide wax is 1:1:0.2) until the materials are evenly dispersed without obvious large lumps of powder. Stir at high speed for at least 15 minutes and grind. Adjust the viscosity of the vehicle with 6.3 parts of water. S2, grinding process: machine temperature ≤ 50 ℃, use 1.7 parts of water to adjust the top water volume, fineness ≤ 35μm; S3. Color Mixing and Thinning Process: While stirring at a medium speed of 300-600 rpm, add 30 parts of Wantipro 0616, 4 parts of ethylene glycol butyl ether, 0.5 parts of TEGO Twin 4100, 0.2 parts of AFCONA-2508, 1 part of ED-615F, 3 parts of SN-612, 0.5 parts of ACRYSOL RM-2020, 2 parts of thickener, and 0.5 parts of ACRYSOL™ RM-2020. Before thickening, thin the paint in advance. Control the final viscosity to 75 ku and the temperature to 26°C. Spray the paint on a plate to see the color. The dry film thickness is 35 μm. The gloss is based on a dry film thickness of 26 μm for spraying on tinplate (if spraying is not required, brush the plate). Drying method: Air-dry. Visually check the color.

[0024] Example 4 A method for preparing a water-based dip coating for a mining chain comprises the following steps: S1. First, add 15 parts of epoxy ester resin into the mixing tank and start stirring. In the stirring state, add 0.75 parts of dimethylethanolamine, 1 part of ethylene glycol butyl ether and 0.5 parts of CQ88A in sequence. After adding, stir at high speed (speed above 700 rpm) for at least 10 minutes. After fully mixing with the resin, add 12 parts of deionized water in batches of at least three times. After diluting the resin, add 1 part of D72, 0.3 parts of 104E, 0.2 parts of AFCONA-2507, 1.5 parts of aniline black and 1.5 parts of iron. Black, 10 parts of anti-rust pigment (composed of the following components in percentage by weight: 10% zinc phosphate, 5% aluminum zinc phosphate, 5% ion exchange anti-rust pigment, and the rest are composite anti-rust pigments), 5 parts of mica powder, 5 parts of talc powder, 7.5 parts of precipitated barium sulfate, 2 parts of rheological additive (wherein the mass ratio of attapulgite, fumed silica, and polyamide wax is 1:1:0.2) and so on until the materials are evenly dispersed without obvious large lumps of powder, stir at high speed for at least 15 minutes, grind, and adjust the viscosity of the vehicle with 5.8 parts of water; S2, grinding process: machine temperature ≤ 50 ℃, use 2.2 parts of water to adjust the top water volume, fineness ≤ 35μm; S3. Color Mixing and Dilution Process: While stirring at a medium speed of 300-600 rpm, add 25 parts of Wantipro 0616, 4 parts of ethylene glycol butyl ether, 0.5 parts of TEGO Twin 4100, 0.2 parts of AFCONA-2508, 1 part of ED-615F, 3 parts of thickener, and 0.5 parts of ACRYSOL RM-2020 in sequence. Before thickening, thin the mixture in advance. Control the final viscosity to 75 ku and the temperature to 26°C. Spray the plate at the desired temperature to see the color. The dry film thickness is 35 μm. The gloss is tested based on a dry film thickness of 26 μm for spraying on tinplate (if spraying is not required, brush the plate). Drying method: Air dry. Visually check the color.

[0025] Example 5 A method for preparing a water-based dip coating for a mining chain comprises the following steps: S1. First, add 15 parts of epoxy ester resin into the mixing tank and start stirring. In the stirring state, add 1 part of dimethylethanolamine, 1.5 parts of ethylene glycol butyl ether and 0.1 part of CQ88A in sequence. After adding, stir at high speed (speed above 700 rpm) for at least 10 minutes. After fully mixing with the resin, add 12 parts of deionized water in batches of at least three times. After diluting the resin, add 1 part of D72, 0.3 parts of 104E, 0.1 parts of AFCONA-2507, 1 part of pigment yellow 183 and 1 part of oxygen. Mix ferric yellow iron, 5 parts of anti-rust pigment (composed of the following components in percentage by mass: 10% zinc phosphate, 5% aluminum zinc phosphate, 5% ion exchange anti-rust pigment, and the rest are composite anti-rust pigments), 5 parts of mica powder, 5 parts of talc powder, 10 parts of precipitated barium sulfate, and 1 part of rheological additive (wherein the mass ratio of attapulgite, fumed silica, and polyamide wax is 1:1:0.2) until the materials are evenly dispersed without obvious large lumps of powder. Stir at high speed for at least 15 minutes and grind. Add 6.3 parts of water to adjust the viscosity of the vehicle. S2, grinding process: machine temperature ≤ 50 ℃, use 1.7 parts of water to adjust the top water volume, fineness ≤ 35μm; S3. Color adjustment and dilution process: under medium speed stirring of 300-600 rpm, add 30 parts of Wantipro 0616, 2 parts of ethylene glycol butyl ether, 0.2 parts of TEGO Twin 4100, 0.1 parts of AFCONA-2508, 0.2 parts of ED-615F, 3 parts of SN-612, 0.2 parts of ACRYSOL RM-2020, etc. in sequence. Before thickening, it is necessary to dilute it in advance for use. The final viscosity is controlled at 75ku and the temperature is 26℃. The color is observed on the temperature spray plate. The dry film thickness is 35μm. The gloss is tested according to the dry film thickness of 26μm on the tinplate spray plate (if the spray plate is not required, the plate should be brushed). Drying method: air drying, and the visual color is similar.

[0026] Example 6 A method for preparing a water-based dip coating for a mining chain comprises the following steps: S1. First add 15 parts of epoxy ester resin into the mixing tank and start stirring. In the stirring state, add 1 part of dimethylethanolamine, 2 parts of ethylene glycol butyl ether and 0.1 parts of CQ88A in sequence. After adding, stir at high speed (speed above 700 rpm) for at least 10 minutes. After fully mixing with the resin, add 12 parts of deionized water in batches of at least three times. After diluting the resin, add 1 part of D72, 0.3 parts of 104E, 0.3 parts of AFCONA-2507, 4 parts of Pigment Yellow 183 and 4 parts of Oxide Iron oxide yellow, 5 parts of anti-rust pigment (composed of the following components in percentage by weight: 10% zinc phosphate, 5% aluminum zinc phosphate, 5% ion exchange anti-rust pigment, and the rest are composite anti-rust pigments), 5 parts of mica powder, 5 parts of talc powder, 10 parts of precipitated barium sulfate, and 1 part of rheological additive (wherein the mass ratio of attapulgite, fumed silica, and polyamide wax is 1:1:0.3). Mix until the materials are evenly dispersed without obvious large lumps, stir at high speed for at least 15 minutes, grind, and adjust the viscosity of the vehicle with 6.3 parts of water; S2, grinding process: machine temperature ≤ 50 ℃, use 1.7 parts of water to adjust the top water volume, fineness ≤ 35μm; S3. Color adjustment and dilution process: under medium speed stirring of 300-600 rpm, add 30 parts of Wantipro 0616, 5 parts of ethylene glycol butyl ether, 1 part of TEGO Twin 4100, 0.3 parts of AFCONA-2508, 1 part of ED-615F, 3 parts of SN-612, 1 part of ACRYSOLRM-2020, etc. in sequence. Before thickening, it is necessary to dilute it in advance for use. The final viscosity is controlled at 75ku and the temperature is 26℃. The color is observed on the temperature spray plate. The dry film thickness is 35μm. The gloss is tested according to the dry film thickness of 26μm on the tinplate spray plate (if the spray plate is not required, the plate should be brushed). Drying method: air drying, and the visual color is similar.

[0027] Example 7 The only difference between this embodiment and embodiment 4 is that 3 parts of graphene oxide-coated zeolite are added; The preparation method of the graphene oxide-coated zeolite is as follows: 10 g of zeolite is placed in 100 mL of 0.5 mol / L NaOH solution, stirred at 70° C., and then washed with water and dried to obtain a pretreated zeolite; 8 g of the pretreated zeolite is placed in 150 mL of KH550 ethanol-water solution (the volume ratio of KH550, ethanol and water is 1:3:5), stirred at 70° C., filtered, washed, and dried to obtain a secondary-treated zeolite; 0.2 g of graphene oxide is dispersed in 150 mL of water, ultrasonicated, 1 g of the secondary-treated zeolite is placed in the water, stirred at 70° C., and filtered and dried to obtain a graphene oxide-coated zeolite.

[0028] Example 8 The only difference between this embodiment and embodiment 4 is that 3 parts of graphene oxide-coated zeolite are added; The preparation method of the graphene oxide coated zeolite is as follows: 10 g of zeolite is put into 200 mL of 0.6 mol / L NaOH solution, stirred at 80°C, washed with water and dried to obtain pretreated zeolite; 8 g of the pretreated zeolite is put into 200 mL of KH550 ethanol-water solution (the volume ratio of KH550, ethanol and water is 1:3:6) and stirred at 80°C, then filtered, washed and dried to obtain twice treated zeolite; 0.3 g of graphene oxide is dispersed in 150 mL of water, ultrasonically treated, put into 1 g of the twice treated zeolite, stirred at 80°C, filtered and dried to obtain graphene oxide coated zeolite.

[0029] Example 9 The difference between this example and Example 4 is that 3 parts of graphene oxide coated carbon fiber prepared in Example 9 is additionally added. The preparation method of the graphene oxide coated carbon fiber is as follows: 10 g of carbon fiber powder is dispersed in 80 mL of water containing 0.5 g of cationic surfactant, ultrasonically stirred, washed and dried to obtain pretreated carbon fiber powder; 2 g of the pretreated carbon fiber powder is dispersed in 50 mL of water, 5 mL of 4 mg / mL graphene oxide aqueous solution is added dropwise to obtain graphene oxide coated carbon fiber.

[0030] Example 10 The difference between this example and Example 4 is that 3 parts of graphene oxide coated carbon fiber prepared in Example 9 is additionally added. The preparation method of the graphene oxide coated carbon fiber is as follows: 10 g of carbon fiber powder is dispersed in 80 mL of water containing 0.5 g of cationic surfactant, ultrasonically stirred, washed and dried to obtain pretreated carbon fiber powder; 2 g of the pretreated carbon fiber powder is dispersed in 50 mL of water, 5 mL of 4 mg / mL graphene oxide aqueous solution is added dropwise to obtain graphene oxide coated carbon fiber.

[0031] Example 11 The difference between this example and Example 4 is that 1.5 parts of graphene oxide coated zeolite prepared in Example 7 and 1.5 parts of graphene oxide coated carbon fiber prepared in Example 9 are additionally added.

[0032] Example 12 The difference between this example and Example 4 is that 2 parts of graphene oxide coated zeolite prepared in Example 7 and 4 parts of graphene oxide coated carbon fiber prepared in Example 9 are additionally added.

[0033] Comparative Example 1 The difference between this comparative example and Example 3 is that no composite anti-rust pigment is added.

[0034] Comparative Example 2 The difference between this comparative example and Example 3 is that no ion exchange type anti-rust pigment is added.

[0035] Comparative Example 3 The only difference between this comparative example and Example 3 is that zinc phosphate and aluminum zinc phosphate are not added.

[0036] The paint films prepared in Examples 1 to 12 and Comparative Examples 1 to 3 were tested for their performance: The viscosity of the original paint and the dipping viscosity are measured according to the international standard "ISO 2431-2016 Paints and varnishes - Determination of flow time using a flow cup"; Impact resistance is measured according to the national standard "GB / T 1732-2020 Determination of impact resistance of paint films"; The bending test is measured according to the national standard "GB / T 1731-2020 Determination of flexibility of paint film and putty film"; Hardness is measured according to the national standard "GB / T 6739-2006 Paints and varnishes - Determination of film hardness by pencil method"; The cross-cut test is measured according to the national standard "GB / T 9286-1998 Cross-cut test for paint and varnish films"; Acid resistance is measured according to the national standard "GB / T 9274-1988 Paints and varnishes - Determination of resistance to liquid media"; Alkali resistance is measured according to the national standard "GB / T 9265-2009 Determination of Alkali Resistance of Architectural Paint Coatings"; Water resistance is measured according to the national standard "GB / T 1733-1993 Determination of water resistance of paint films"; Salt resistance is measured according to the national standard "GB / T 9274-1988 Paints and varnishes - Determination of resistance to liquid media"; Neutral salt spray resistance is measured in accordance with the national standard "GB / T 1771-2007 Paints and varnishes - Determination of neutral salt spray resistance".

[0037] The results are shown in Tables 1 and 2 below.

[0038] Table 1 Paint film performance test results

[0039] Table 2 Paint film performance test results

[0040] By comparing the data of Example 4 and Examples 7 to 12, it was found that in Examples 7 to 10, by adding graphene oxide-coated zeolite or graphene oxide-coated carbon fiber during the preparation of the water-based dip coating, the acid resistance, alkali resistance, water resistance, salt water resistance and neutral salt spray resistance of the paint film obtained were better than those in Example 4. Therefore, the corrosion resistance of the paint film can be improved by introducing graphene oxide-coated zeolite or graphene oxide-coated carbon fiber. The paint films obtained in Examples 11 to 12 had better acid resistance, alkali resistance, water resistance, salt water resistance and neutral salt spray resistance than those in Examples 7 to 10, indicating that the combination of graphene oxide-coated zeolite and graphene oxide-coated carbon fiber further improves the corrosion resistance of the paint film.

[0041] By comparing the data of Example 4 and Comparative Examples 1 to 3, it was found that in Example 4, zinc phosphate, aluminum zinc phosphate, ion exchange type anti-rust pigment and composite anti-rust pigment were used in combination, and the acid resistance, alkali resistance, water resistance, salt water resistance and neutral salt spray resistance of the paint film obtained were better than those of Comparative Examples 1 to 3. Therefore, zinc phosphate, aluminum zinc phosphate, ion exchange type anti-rust pigment and composite anti-rust pigment were used as anti-rust pigments to improve the corrosion resistance of the obtained paint film.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A water-based dip coating for mining chains, characterized in that: The invention comprises the following components in parts by weight: 10-15 parts of epoxy ester resin, 0.5-1 parts of neutralizing agent, 1-2 parts of diluent, 0.1-0.5 parts of drying agent, 1-1.5 parts of dispersant, 0.3-1.3 parts of wetting agent, 0.2-0.6 parts of defoaming agent, 2-8 parts of coloring pigment, 5-10 parts of anti-rust pigment, 10-20 parts of filler, 1-2 parts of rheological additive, 25-40 parts of emulsion, 2-5 parts of cosolvent, 0.2-1 parts of anti-flash rust inhibitor, 0.2-1 parts of leveling agent, 1-3 parts of thickener, and 16-20 parts of water; The anti-rust pigment is zinc phosphate, aluminum zinc phosphate, ion exchange type anti-rust pigment and composite type anti-rust pigment.

2. The aqueous dip coating for mining chains according to claim 1, characterized in that: The epoxy ester resin is a water-based acrylic acid modified epoxy resin with a solid content of ≥70% and a viscosity of ≤20000 mPa.s; The neutralizing agent is dimethylethanolamine; The diluent is any one of ethylene glycol butyl ether, propylene glycol methyl ether and dipropylene glycol methyl ether.

3. The aqueous dip coating for mining chains according to claim 1, characterized in that: The drier is a composite drier containing a metal carboxylate and an accelerator; the model of the composite drier includes CQ88A; The dispersant is a low molecular weight polymer dispersant; The low molecular weight polymer dispersant includes D72; The wetting agent is an acetylenic diol nonionic surfactant and / or a silicone surfactant; The defoaming agent may be of one or both of AFCONA-2507 and AFCONA-2508.

4. The aqueous dip coating for mining chains according to claim 1, characterized in that: The coloring pigment is a black pigment and / or a yellow pigment; The black pigment includes one or more of carbon black, aniline black, and iron black; The yellow pigment includes one or more of Pigment Yellow 183 and Iron Oxide Yellow; The filler is one or more of mica powder, talc powder, and barium sulfate; The rheological additives are attapulgite, fumed silica and polyamide wax; The emulsion is a water-based acrylic emulsion; The cosolvent is one or more of ethylene glycol butyl ether, propylene glycol methyl ether, and alcohol ester 12.

5. The aqueous dip coating for mining chains according to claim 1, characterized in that: The anti-flash rust inhibitor models include ED-615F; The leveling agent is a polyurethane leveling agent, and the model of the polyurethane leveling agent includes ACRYSOL RM-2020; The thickener is a polyurethane thickener, and the polyurethane thickener model includes SN-612.

6. The aqueous dip coating for mining chains according to claim 4, characterized in that: The anti-rust pigment is specifically composed of the following components in percentage by mass: 5% to 10% zinc phosphate, 3% to 5% aluminum zinc phosphate, 1% to 5% ion exchange anti-rust pigment, and the rest is composite anti-rust pigment; The mass ratio of the mica powder, talc powder and precipitated barium sulfate is 1:1:1-3; The mass ratio of the attapulgite, fumed silica and polyamide wax is 1:1:0.2-0.

3.

7. The aqueous dip coating for mining chains according to claim 1, characterized in that: It also includes the following components in parts by weight: 3 to 6 parts of corrosion-resistant additives; The corrosion-resistant additive is graphene oxide-coated zeolite and / or graphene oxide-coated carbon fiber; When the corrosion-resistant additives are graphene oxide-coated zeolite and graphene oxide-coated carbon fiber, the mass ratio of the graphene oxide-coated zeolite to the graphene oxide-coated carbon fiber is 1:1~2.

8. The aqueous dip coating for a mining chain according to claim 7, characterized in that: The preparation method of the graphene oxide-coated zeolite is as follows: placing the zeolite in a 0.5-0.6 mol / L NaOH solution, stirring at 70-80° C., and then washing and drying to obtain a pretreated zeolite; The pretreated zeolite is placed in an ethanol-water solution containing a silane coupling agent, stirred at 70-80°C, filtered, washed, and dried to obtain a secondary treated zeolite; graphene oxide is dispersed in water, ultrasonicated, and the secondary treated zeolite is placed in the water, stirred at 70-80°C, filtered, and dried to obtain a graphene oxide-coated zeolite; The preparation method of the graphene oxide-coated carbon fiber comprises: dispersing the carbon fiber in water containing a cationic surfactant, stirring with ultrasound, washing, and drying to obtain pretreated carbon fiber; The pretreated carbon fibers were dispersed in water, and a 4-5 mg / mL graphene oxide aqueous solution was added dropwise to obtain graphene oxide-coated carbon fibers.

9. The aqueous dip coating for mining chains according to claim 8, characterized in that: The mass volume ratio of the zeolite and NaOH solution is 10g:100~200mL; The ethanol-water solution comprises ethanol and water, and the volume ratio of the silane coupling agent, ethanol and water is 1:3:5-6; The mass volume ratio of the pretreated zeolite and the ethanol-water solution containing the silane coupling agent is 8 g:150-200 mL; The volume ratio of the graphene oxide, the secondary treated zeolite and water is 0.2-0.3 g:1 g:150 mL; The mass volume ratio of the carbon fiber, cationic surfactant and water is 10g:0.5g:80-100mL; The mass volume ratio of the pretreated carbon fiber, the graphene oxide aqueous solution and water is 2g:5mL:50~60mL.

10. A method for preparing a water-based dip coating for a mining chain, for preparing the water-based dip coating for a mining chain according to any one of claims 1 to 9, characterized in that: The following steps are involved: The epoxy ester resin is mixed with a neutralizer, a diluent and a drying agent, and then water, a dispersant, a wetting agent, a defoaming agent, a coloring pigment, an anti-rust filler, a filler and a rheological additive are added. After stirring, the remaining components of the water-based dip paint are added at 300-600 rpm to control the final viscosity to 70-80 ku to obtain a water-based dip paint for mining chains.

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