Super-wear-resistant anti-scratch water-based metallic paint and preparation method thereof

Abstract

The invention provides super-wear-resistant and scratch-resistant water-based metallic paint. The super-wear-resistant and scratch-resistant water-based metallic paint is prepared from a component A and a component B, wherein the component A is prepared from the following components in percentage by mass: 35 to 40 percent of hydroxyl acrylic emulsion, 5 to 10 percent of silica sol, 5 to 8 percent of modified quartz powder, 5 to 8 percent of water-based aluminum paste, 20 to 25 percent of auxiliaries and the balance of water; and the component B is a water-based isocyanate curing agent. The water-based metallic paint provided by the invention is prepared from the hydroxyl acrylic emulsion as matrix resin and the isocyanate cross-linking agent, and has the characteristics of high hardness, good wear resistance and good stain resistance. In addition, the quartz powder is also modified. On one hand, the compatibility of the modified quartz powder and the hydroxyl acrylic emulsion is remarkably enhanced, a more stable, compact and three-dimensional net-shaped structure is constructed, and the mechanical performance of the product is effectively improved; on the other hand, the modified quartz powder has a unique nanoscale cage-shaped structure, so that the wear resistance of the paint film can be greatly improved.

Description

Technical Field

[0001] The invention relates to the field of architectural coatings, and mainly relates to a super wear-resistant and scratch-resistant water-based metallic paint and a preparation method thereof. Background Art

[0002] With the continuous development of construction projects, architectural decoration elements have become more diversified, and more and more decorative materials have entered the sight of designers. Therefore, the category of coatings has been greatly developed. Among the popular architectural coatings, there is a category of products that are famous for their high-end metallic texture, which is metallic paint. Metallic paint refers to a kind of normal temperature or high temperature curing paint with fine metal powder added to the paint base. Its effect gives people a pleasant, light and novel feeling. The application fields of metallic paint in construction projects mainly include interior and exterior wall decoration, integrated board decoration, etc. The categories mainly include solvent-based metallic paint and water-based metallic paint. Solvent-based metallic paint mainly includes fluorocarbon metallic paint, polyurethane metallic paint, acrylic metallic paint, etc. Water-based metallic paint mainly includes water-based fluorocarbon metallic paint, water-based acrylic metallic paint, etc. Solvent-based metallic paint is made of oily resin and has relatively good strength and comprehensive physical properties. However, due to its high VOC emissions during construction, it causes serious air pollution and harms human health. It is often only used on some factory prefabricated panels such as aluminum veneer, and is rarely used on building walls. Therefore, water-based or solvent-free is an important direction for the future development of metallic paint. However, at present, water-based metallic paint products often find it difficult to achieve the high fullness, high hardness, high wear resistance and scratch resistance of solvent-based products. When used on walls or prefabricated panels, the paint film is often easily scratched due to poor stain and scratch resistance, and the functionality is not prominent enough.

[0003] In summary, it is necessary to develop a new technical solution to solve the defects and shortcomings in the existing technology. Summary of the invention

[0004] In view of the shortcomings of existing water-based metallic paints for walls or prefabricated panels, which have poor hardness and scratch resistance, the present invention provides a super wear-resistant and scratch-resistant water-based metallic paint and a preparation method thereof. The product has the characteristics of high hardness, smooth surface, good stain resistance, scratch resistance, super wear resistance, etc., making the building walls and prefabricated panels durable.

[0005] One object of the present invention is to provide a super wear-resistant and scratch-resistant water-based metallic paint, wherein the super wear-resistant and scratch-resistant water-based metallic paint comprises the following components in mass fraction:

[0006] Component A:

[0007]

[0008] Component B:

[0009] Water-based isocyanate curing agent;

[0010] in,

[0011] The modified quartz powder is obtained by grafting pentaerythritol triacrylate with quartz powder and then copolymerizing with acrylic-cage-shaped polysilsesquioxane and hydroxy acrylate.

[0012] Furthermore, the hydroxy acrylic emulsion is a hydroxy acrylic primary dispersion. Hydroxyl acrylic emulsion is an important variety of water-based acrylic resin, which can be formulated with isocyanate crosslinking agent into environmentally friendly water-based acrylic polyurethane coating. The hydroxy acrylic emulsion coating has a short drying time and a long service life, has strong adhesion and hardness on the surface of objects, high gloss, excellent impact resistance and tensile properties, etc., and has a low VOC content and almost no pollution to the environment. In the film-forming process of water-based acrylic polyurethane coating, the hydroxy acrylic emulsion and isocyanate crosslinking agent that are not in the same phase are mixed evenly through mechanical stirring and the emulsification effect of the hydroxy acrylic emulsion on the isocyanate crosslinking agent. After the two components are mixed, the particles are combined, and as the water begins to evaporate, a cross-linked network structure is formed. Archsol 8573 produced by Wanhua Group is preferred, which has a hydroxyl value of 4.0-4.8% and a minimum film-forming temperature of 10°C.

[0013] Furthermore, silica sol has high permeability, and after drying, the sol easily forms a network structure, and the coating is hard, has strong adhesion, is resistant to water and weather, and has good stain resistance. After silica sol is physically blended with hydroxyl acrylic emulsion, the polymer in the hydroxyl acrylic emulsion is evenly distributed in the gaps of the "Si-O-Si" inorganic coating, which enhances the performance of the coating. The preferred S300 of Pei Teng Company has a particle size of 10nm and a pH value of 9-11. It is a modified silica water-dispersed sol.

[0014] Furthermore, the water-based aluminum paste is a SiO2-coated aluminum paste; preferably, the OKH series aluminum paste produced by OKA Corporation.

[0015] Furthermore, the auxiliary agent is selected from one or more of an anti-settling agent, a dispersant, a substrate wetting agent, a film-forming agent, a defoaming agent, a thickener, a bactericide, a silane coupling agent, a leveling agent, a mildewproof agent, a hardening and wear-resistant auxiliary agent, a pH adjuster or an aligning agent.

[0016] Furthermore, the dispersant is a polyacrylic acid sodium salt dispersant, and preferably a dispersant of model D32 produced by Puwei Company. The dispersant has high dispersing efficiency, improves sufficient charge repulsion and steric hindrance between ions, and can completely solve the problems of stratification and agglomeration.

[0017] Furthermore, the film-forming aid is dodecanol ester, preferably a film-forming aid of model TEXANOL produced by Eastman Chemical Company. The film-forming aid is 2,2,4-trimethyl-1,3-pentanediol-isobutyric acid monoester, which has high film-forming efficiency and high boiling point, and does not belong to the category of VOC.

[0018] Furthermore, the defoamer is a mineral oil defoamer; preferably, the A10 defoamer produced by BASF has good compatibility with the present formulation, is not prone to shrinkage, and has high defoaming efficiency.

[0019] Furthermore, the thickener is a polyurethane thickener, preferably a thickener of model RM-8W produced by Dow Chemical Company. The thickener has good compatibility with the formula and provides medium and low shear viscosity.

[0020] Furthermore, the bactericide is a CMI / MI type bactericide, preferably a bactericide of model MBS5050 produced by Thor. The bactericide in this formula can effectively prevent the product from being attacked by microorganisms during production and storage, thereby preventing the product from smelling.

[0021] Furthermore, the mildew-proofing agent is selected from one or more of IPBC mildew-proofing agents or ZPT mildew-proofing agents.

[0022] Furthermore, the pH regulator is a multifunctional amine auxiliary agent; preferably, the auxiliary agent model AMP-95 produced by Dow Chemical Company.

[0023] Furthermore, the silane coupling agent is γ-(2,3-epoxypropoxy)propyltrimethoxysilane; preferably A-187 from Momentive, which can be used to improve the adhesion of organic resins to inorganic surfaces, and can significantly improve the wet abrasion resistance, wear resistance and high temperature resistance of inorganic coatings; its use in the present invention can greatly improve the bonding strength between the components in the coating film.

[0024] Furthermore, the substrate wetting agent is preferably Evonik's tego4100 substrate wetting agent, the main component of which is a siloxane-based twin structure surfactant, which has substrate wetting properties, anti-cratering properties and a certain degree of defoaming properties.

[0025] Another object of the present invention is to provide a method for preparing the above-mentioned super wear-resistant and scratch-resistant water-based metallic paint, comprising the following steps:

[0026] S1, mixing quartz powder with chloroacetic acid, heating and ultrasonic reaction, washing and drying to obtain carboxylated quartz powder;

[0027] S2, blending the carboxylated quartz powder with activators EDC·HCl and DMAP, then adding pentaerythritol triacrylate, ultrasonically reacting, purifying, washing, and drying to obtain an intermediate product;

[0028] S3, blending the intermediate product, acrylic-cage polysilsesquioxane, hydroxy acrylate and initiator, heating for reaction, purifying, washing and drying to obtain modified quartz powder;

[0029] S4. Blend part of the water and part of the additives, stir to form a colloid; add the modified quartz powder, stir and grind; add hydroxy acrylic emulsion and silica sol, stir and mix; add water-based aluminum silver paste, stir and mix; add the remaining components and the remaining water, stir and mix to obtain component A; when using, mix the component A and component B to obtain a super wear-resistant and scratch-resistant water-based metallic paint.

[0030] Furthermore, in step S1, the heating temperature is 80-100°C.

[0031] Furthermore, in step S1, the mass ratio of the quartz powder to chloroacetic acid is (30-60):1.

[0032] Furthermore, in step S2, the mass ratio of the carboxylated quartz powder, EDC·HCl, DMAP and pentaerythritol triacrylate is (0.5-1.5):(5-15):(3-5):(0.5-1.5).

[0033] Furthermore, in step S3, the mass ratio of the intermediate product, acrylic-cage polysilsesquioxane, hydroxy acrylate and initiator is (1-5):(1-3):(5-10):(0.1-0.5).

[0034] Furthermore, in step S3, the heating temperature is 60-80°C.

[0035] The present invention has the following beneficial effects:

[0036] (1) The water-based metallic paint provided by the present invention adopts hydroxy acrylic emulsion as the base resin and is formulated with an isocyanate crosslinking agent, and has the characteristics of high hardness, good wear resistance and good stain resistance. In addition, the present invention also modifies quartz powder. First, the quartz powder is carboxylated and reacted with pentaerythritol triacrylate to introduce an intermediate product with an unsaturated double bond and a branched structure, which not only provides active sites for subsequent reactions, but also helps to form a crosslinked structure; then, the intermediate product is copolymerized with acrylic-cage polysilsesquioxane and hydroxy acrylate to form a copolymer with a highly crosslinked structure and containing a large number of active groups such as hydroxyl groups. The modified quartz powder has the following advantages: on the one hand, it significantly enhances the compatibility of the modified quartz powder with hydroxyl acrylic emulsion, and uses active groups such as hydroxyl groups to produce cross-linking, thereby constructing a more stable, dense and three-dimensional network structure, effectively improving the mechanical properties of the product; on the other hand, the introduction of acrylic-cage polysilsesquioxane gives the modified quartz powder a unique nano-scale cage structure, which tightly wraps the quartz powder molecules and other components, and after curing, can greatly improve the wear resistance of the paint film.

[0037] (2) The present invention uses a hydroxyl polyol resin containing a hydrophilic group and a water-dispersible polyisocyanate curing agent to prepare a water-based two-component polyurethane coating (water-based 2K PU), and uses water instead of an organic solvent as a diluent for the entire system, thereby significantly reducing VOC emissions while ensuring good appearance and excellent performance.

[0038] (3) The present invention uses SiO2 nanoparticles in silica sol to blend with waterborne polyurethane to form a composite coating. The incorporation of hard SiO2 nanoparticles and the formation of the resulting network structure make the coating exhibit good wear resistance, and its water resistance is also greatly improved. In addition, the Si-O-Si network structure leads to improved barrier and insulation properties of the coating, significantly enhancing its UV resistance and electrochemical corrosion resistance. Dispersants, wetting agents, wax emulsions, anti-scratch additives, quartz powder, hardening and wear-resistant additives, stabilized colloidal silica, metal powder, etc. are added to prepare a silicon-modified waterborne polyurethane metal paint main agent, and isocyanate curing agent is used for chemical cross-linking to form a high-density and high-hardness metal effect coating film, improve mechanical properties and wear resistance, prevent metal paint from scratching, bumping and other problems during use, and are healthy and environmentally friendly. It can be used for the decoration of indoor aluminum veneers and thermal insulation integrated panels or exterior wall surfaces of buildings, and is easy to maintain.

[0039] (4) Compared with ordinary water-based single-component metallic paint, the present invention can effectively prevent the problem of paint film peeling and extend the service life. In addition, the modified water-based hydroxypropyl emulsion is used as the main component, which is easier to achieve anti-fouling and self-cleaning properties, and is convenient for cleaning with cleaning utensils. In addition, the present invention can dry itself at room temperature, and compared with solvent-based coatings such as PVDF aluminum veneer fluorocarbon metallic paint or polyester aluminum veneer metallic paint, it can reduce energy consumption and reduce VOC emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 The hardness comparison between the ultra-wear-resistant and scratch-resistant water-based metallic paint of Example 1 of the present invention and the common water-based metallic paint available on the market is shown;

[0041] in,

[0042] Figure 1 (a) shows the hardness of the ultra-wear-resistant and scratch-resistant water-based metallic paint of Example 1 tested with a 2H pencil, with essentially no scratches or breaks;

[0043] Figure 1 (b) shows the hardness test of ordinary commercial water-based metallic paint using a 2H pencil, which shows scratches that cannot be erased.

[0044] Figure 2 The stain resistance test of the ultra-wear-resistant and scratch-resistant water-based metal paint film of Example 1 and the commercially available ordinary water-based metal paint film is shown;

[0045] in,

[0046] Figure 2 (a) shows the ultra-wear-resistant and scratch-resistant water-based metal paint film of Example 1 being painted with a water-based pen;

[0047] Figure 2 (b) shows that the ultra-wear-resistant and scratch-resistant water-based metal paint film of Example 1 was scribbled with a water-based pen and then wiped with a dry cloth;

[0048] Figure 2 (c) shows the graffiti of a commercially available ordinary water-based metallic paint film using a water-based pen;

[0049] Figure 2 (d) shows a commercially available ordinary water-based metallic paint film that was scribbled on with a water-based pen and then wiped with a dry cloth. DETAILED DESCRIPTION

[0050] In order to more clearly illustrate the technical solution of the present invention, the following examples are listed. Unless otherwise stated, the raw materials, reactions and post-treatment methods shown in the examples are common raw materials on the market and technical methods well known to those skilled in the art.

[0051] The words "preferred", "preferably", "more preferably", etc. in the present invention refer to embodiments of the present invention that can provide certain beneficial effects in certain circumstances. However, other embodiments may also be preferred under the same circumstances or other circumstances. In addition, the description of one or more preferred embodiments does not imply that other embodiments are not applicable, nor is it intended to exclude other embodiments from the scope of the present invention.

[0052] It should be understood that, except in any operating examples, or where otherwise indicated, all numbers indicating, for example, the amounts of ingredients used in the specification and claims should be understood to be modified in all cases by the term "about". Therefore, unless indicated to the contrary, the numerical parameters set forth in the following specification and the appended claims are approximate values ​​that vary depending on the desired properties to be obtained by the present invention.

[0053] The present invention uses the following materials:

[0054] The hydroxylated acrylic emulsion, with the brand name Archsol 8573, was purchased from Wanhua Group and is a hydroxylated acrylic primary dispersion having a hydroxyl value of 4.0-4.8% and a minimum film-forming temperature of 10°C.

[0055] Silica sol, brand S300, purchased from Pei Teng Company, is a modified silicon oxide water-dispersed sol with a particle size of 10 nm and a pH value of 9-11.

[0056] The quartz powder is of the brand Silver Bond, purchased from Sibelco of Belgium, and has a Mohs hardness of 7.

[0057] The water-based aluminum paste is OKH series aluminum paste purchased from OK Company. It is a SiO2-coated aluminum paste with an Al content of 54% and a SiO2 content of 8%.

[0058] The anti-settling agent is a 2% concentration anti-settling slurry made of bentonite of Hemmings brand DE.

[0059] The dispersant brand is D32, purchased from Puwei Company, and is a polyacrylate ammonium salt dispersant.

[0060] The substrate wetting agent is Tego4100, purchased from Evonik, and its main component is a siloxane-based twin structure surfactant.

[0061] The film-forming aid is 2,2,4-trimethyl-1,3-pentanediol-isobutyric acid monoester, with the brand name TEXANOL, purchased from Eastman Chemical Company.

[0062] The defoamer brand is A10, purchased from BASF, and is a mineral oil defoamer.

[0063] The thickener is RM-8W, purchased from Dow Chemical Company, and is a polyurethane thickener.

[0064] The fungicide brand is MBS5050, purchased from Thor, and is a CMI / MI fungicide.

[0065] The silane coupling agent is A-187, purchased from Momentive, and is γ-(2,3-epoxypropoxy)propyltrimethoxysilane.

[0066] The leveling agent is BYK-333, purchased from BYK.

[0067] The brand of the mildew preventer is ZOE-2X, purchased from Oshada Company, with an effective content of 37%, and is a ZPT type mildew preventer.

[0068] The hardening and wear-resistant additive is XF-80G, purchased from Guangzhou Jingbang Company, and its main component is modified polysiloxane polymer.

[0069] The pH regulator is AMP-95, purchased from Dow Chemical Company, and is a multifunctional amine additive.

[0070] The directional alignment agent is EVA wax additive with model BYK-8421, which is purchased from BYK.

[0071] The antifreeze agent was ethylene glycol, purchased from Guangzhou Chenfeng Chemical Co., Ltd.

[0072] Acrylic-cage polysilsesquioxane was purchased from Forsman Technology (Beijing) Co., Ltd.

[0073] The water-based isocyanate curing agent is HDI.

[0074] Example 1

[0075] A super wear-resistant and scratch-resistant water-based metallic paint, the super wear-resistant and scratch-resistant water-based metallic paint comprises the following components in mass fraction:

[0076] Component A:

[0077]

[0078]

[0079] Component B:

[0080] Water-based isocyanate curing agent;

[0081] in,

[0082] The modified quartz powder is obtained by grafting pentaerythritol triacrylate with quartz powder and then copolymerizing with acrylic-cage-shaped polysilsesquioxane and hydroxy acrylate.

[0083] The method for preparing the above-mentioned super wear-resistant and scratch-resistant water-based metallic paint comprises the following steps:

[0084] S1. Add quartz powder into water, ultrasonicate for 20 min, then add chloroacetic acid (quartz powder: water: chloroacetic acid = 1:20:1, m / m / m), ultrasonicate for 30 min at 90° C., wash and dry to obtain carboxylated quartz powder;

[0085] S2. Using N,N-dimethylformamide as solvent, the carboxylated quartz powder and activators EDC·HCl and DMAP are blended, and then pentaerythritol triacrylate is added (carboxylated quartz powder: EDC·HCl: DMAP: pentaerythritol triacrylate = 1:10:4:1, m / m / m / m), ultrasonically reacted for 24 hours, centrifuged, washed, and dried to obtain an intermediate product;

[0086] S3, blending the intermediate product, acrylic-cage polysilsesquioxane, hydroxy acrylate and ammonium persulfate (intermediate product: acrylic-cage polysilsesquioxane: hydroxy acrylate: ammonium persulfate = 3:1:5:0.2, m / m / m / m), reacting at 80° C. for 12 h, centrifuging, washing and drying to obtain modified quartz powder;

[0087] S4. Add water according to the above mass fraction into a dispersion tank, and then add dispersant, substrate wetting agent, defoamer, film-forming aid, bentonite slurry anti-settling agent and pH adjuster, and stir at 400rpm to form a colloid; add the modified quartz powder, and grind at 2500rpm for 25min to a fineness of less than 60μm; add hydroxyl acrylic emulsion and silica sol, and mix evenly at 1000rpm; add water-based aluminum silver paste, and stir at 400rpm for 15min until the silver powder is uniform and free of particles; add the remaining components and the remaining water, and mix evenly at 1000rpm to obtain component A; when using, mix component A and component B to obtain an ultra-wear-resistant and scratch-resistant water-based metallic paint.

[0088] Example 2

[0089] A super wear-resistant and scratch-resistant water-based metallic paint, the super wear-resistant and scratch-resistant water-based metallic paint comprises the following components in mass fraction:

[0090] Component A:

[0091]

[0092]

[0093] Component B:

[0094] Water-based isocyanate curing agent;

[0095] in,

[0096] The modified quartz powder is obtained by grafting pentaerythritol triacrylate with quartz powder and then copolymerizing with acrylic-cage-shaped polysilsesquioxane and hydroxy acrylate.

[0097] The preparation method of the above-mentioned super wear-resistant and scratch-resistant water-based metallic paint is the same as that of Example 1.

[0098] Example 3

[0099] A super wear-resistant and scratch-resistant water-based metallic paint, the super wear-resistant and scratch-resistant water-based metallic paint comprises the following components in mass fraction:

[0100] Component A:

[0101]

[0102]

[0103] Component B:

[0104] Water-based isocyanate curing agent;

[0105] in,

[0106] The modified quartz powder is obtained by grafting pentaerythritol triacrylate with quartz powder and then copolymerizing with acrylic-cage-shaped polysilsesquioxane and hydroxy acrylate.

[0107] The preparation method of the above-mentioned super wear-resistant and scratch-resistant water-based metallic paint is the same as that of Example 1.

[0108] Comparative Example 1

[0109] A super wear-resistant and scratch-resistant water-based metallic paint. The difference between this comparative example and Example 1 is that step S3 is not performed, and in step S4, the modified quartz powder is replaced by the intermediate product in mass, and the remaining ingredients and preparation method are the same as those in Example 1.

[0110] Comparative Example 2

[0111] A super wear-resistant and scratch-resistant water-based metallic paint. The difference between this comparative example and Example 1 is that step S1-2 is not performed, and in step S3, the intermediate product is replaced with quartz powder in equal mass, and the remaining ingredients and preparation method are the same as those in Example 1.

[0112] Test Case

[0113] According to the range of NCO / OH=1.3-1.5, the products of Examples 1-3 and Comparative Examples 1-2 were mixed in a ratio of Component A: Component B = 6:1 to prepare paint films, and their performance was compared with that of commercially available ordinary water-based metallic paints and commercially available latex paints.

[0114] Test method:

[0115] (1) Hardness: Refer to GB / T 22374-2018.

[0116] (2) Abrasion resistance test: GB / T 22374-2018.

[0117] (3) Stain resistance test: Use a water-based pen to stain the paint film surface, then wipe it with a dry cloth to compare the stain resistance performance.

[0118] The test results are as follows Figure 1-2 And as shown in Table 1.

[0119] Figure 1 The hardness comparison between the ultra-wear-resistant and scratch-resistant water-based metallic paint of Example 1 of the present invention and the common water-based metallic paint available on the market is shown;

[0120] in,

[0121] Figure 1 (a) shows the hardness of the ultra-wear-resistant and scratch-resistant water-based metallic paint of Example 1 tested with a 2H pencil, with essentially no scratches or breaks;

[0122] Figure 1 (b) shows the hardness test of ordinary commercial water-based metallic paint using a 2H pencil, which shows scratches that cannot be erased.

[0123] Figure 2 The stain resistance test of the ultra-wear-resistant and scratch-resistant water-based metal paint film of Example 1 and the commercially available ordinary water-based metal paint film is shown;

[0124] in,

[0125] Figure 2 (a) shows the ultra-wear-resistant and scratch-resistant water-based metal paint film of Example 1 being painted with a water-based pen;

[0126] Figure 2 (b) shows that the ultra-wear-resistant and scratch-resistant water-based metal paint film of Example 1 was scribbled with a water-based pen and then wiped with a dry cloth;

[0127] Figure 2 (c) shows the graffiti of a commercially available ordinary water-based metallic paint film using a water-based pen;

[0128] Figure 2 (d) shows a commercially available ordinary water-based metallic paint film that was scribbled on with a water-based pen and then wiped with a dry cloth.

[0129] Table 1 Performance test results

[0130]

[0131] From the above test results, it can be seen that the metal paint of Examples 1-3 added modified quartz powder, and its hardness, wear resistance and stain resistance are excellent. However, in Comparative Examples 1-2, the modified quartz powder is replaced with the intermediate product, or a physical mixture of quartz powder and acrylic-cage polysilsesquioxane and hydroxy acrylate copolymer is used, and its performance is not as good as that of the present invention. In addition, the various properties of the present invention are better than those of ordinary water-based metal paints and commercial latex paints on the market, and have good application prospects.

[0132] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0133] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A super wear-resistant and scratch-resistant water-based metallic paint, characterized in that: The super wear-resistant and scratch-resistant water-based metallic paint comprises the following components by mass fraction: Component A: Component B: Water-based isocyanate curing agent; in, The modified quartz powder is obtained by grafting pentaerythritol triacrylate with quartz powder and then copolymerizing with acrylic-cage-shaped polysilsesquioxane and hydroxy acrylate.

2. The super wear-resistant and scratch-resistant water-based metallic paint according to claim 1, characterized in that: The hydroxylated acrylic emulsion is a hydroxylated acrylic primary dispersion.

3. The ultra-wear-resistant and scratch-resistant water-based metallic paint according to claim 1, characterized in that: The aqueous aluminum-silver paste is a SiO2-coated aluminum-silver paste.

4. The ultra-wear-resistant and scratch-resistant water-based metallic paint according to claim 1, characterized in that: The auxiliary agent is selected from one or more of an anti-settling agent, a dispersant, a substrate wetting agent, a film-forming agent, a defoamer, a thickener, a bactericide, a silane coupling agent, a leveling agent, a mildew-proof agent, a hardening and wear-resistant auxiliary agent, a pH regulator or an aligning agent.

5. The method for preparing the ultra-wear-resistant and scratch-resistant water-based metallic paint according to any one of claims 1 to 4, characterized in that: The steps include: S1, mixing quartz powder with chloroacetic acid, heating and ultrasonic reaction, washing and drying to obtain carboxylated quartz powder; S2, blending the carboxylated quartz powder with activators EDC·HCl and DMAP, then adding pentaerythritol triacrylate, ultrasonically reacting, purifying, washing, and drying to obtain an intermediate product; S3, blending the intermediate product, acrylic-cage polysilsesquioxane, hydroxy acrylate and initiator, heating for reaction, purifying, washing and drying to obtain modified quartz powder; S4, blending part of the water and part of the additive, stirring to form a colloid; adding the modified quartz powder, stirring and grinding; Add hydroxy acrylic emulsion and silica sol, stir and mix; add water-based aluminum silver paste, stir and mix; add other components and remaining water, stir and mix to obtain component A; when using, mix the component A and component B to obtain super wear-resistant and scratch-resistant water-based metallic paint.

6. The method for preparing the super wear-resistant and scratch-resistant water-based metallic paint according to claim 5, characterized in that: In step S1, the heating temperature is 80-100°C.

7. The method for preparing the super wear-resistant and scratch-resistant water-based metallic paint according to claim 5, characterized in that: In step S1, the mass ratio of the quartz powder to chloroacetic acid is (30-60):

1.

8. The method for preparing the super wear-resistant and scratch-resistant water-based metallic paint according to claim 5, characterized in that: In step S2, the mass ratio of the carboxylated quartz powder, EDC·HCl, DMAP and pentaerythritol triacrylate is (0.5-1.5):(5-15):(3-5):(0.5-1.5).

9. The method for preparing the super wear-resistant and scratch-resistant water-based metallic paint according to claim 5, characterized in that: In step S3, the mass ratio of the intermediate product, acrylic-cage polysilsesquioxane, hydroxy acrylate and initiator is (1-5):(1-3):(5-10):(0.1-0.5).

10. The method for preparing the super wear-resistant and scratch-resistant water-based metallic paint according to claim 5, characterized in that: In step S3, the heating temperature is 60-80°C.

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