Soundproof textured metallic paint and preparation method thereof

Abstract

The application relates to the field of paint, in particular to a soundproof texture metal paint and a preparation method thereof. The soundproof texture metal paint comprises a base paint, a protective glue solution and a continuous phase; the base paint comprises piezoelectric ceramic particles and phase change microcapsules in a weight ratio of (2-5):1; the particle size of the piezoelectric ceramic particles is 50-200 meshes, and the phase change temperature of the phase change microcapsules is 30-45 DEG C. By simultaneously adding the piezoelectric ceramic particles and the phase change microcapsules in the base paint, and by limiting the weight ratio, the particle size and the phase change temperature of the piezoelectric ceramic particles and the phase change microcapsules, a complete sound wave energy dissipation chain is constructed, and efficient and stable wide-band soundproofing and noise reduction are realized.

Description

Technical Field

[0001] This application relates to the field of coatings, and in particular to a sound-insulating textured metallic paint and its preparation method. Background Technology

[0002] Aluminum panel curtain walls have long been used for the exterior walls of high-end buildings due to their strong metallic texture and excellent decorative effect. However, aluminum panel curtain walls have drawbacks such as high cost, long construction period, and thermal bridging effect. Water-based metallic paint is one of the alternatives. Although it is convenient to apply and has a lower cost, existing water-based flat metallic paints have extremely high requirements for the flatness of the substrate. When applied to large areas, uneven coloring and mottling are very likely to occur, and it is usually only suitable for linear or small-area decoration.

[0003] To expand the application range of water-based metallic paints, the industry has proposed replacing flat metallic paints with textured metallic paints to reduce the requirements for substrate smoothness and achieve a large-area aluminum panel effect. However, while textured metallic paints solve decorative problems, they still face an unresolved issue: insufficient sound insulation and noise reduction performance.

[0004] Existing sound-insulating coatings primarily achieve sound insulation through two technical approaches: one is to add high-density fillers (such as barite powder, barium sulfate, and iron sand), relying on the law of mass to increase the coating's surface density and thus block sound waves; the other is to add porous, lightweight materials (such as hollow glass microspheres, expanded perlite, and polyurethane foam particles), relying on the viscous effect of the porous structure to absorb sound energy. However, the former leads to a significant increase in coating weight, placing high demands on the wall's load-bearing capacity and reducing workability; the latter often sacrifices the coating's density and mechanical strength, and has limited dissipation effect on low-frequency vibrations. More importantly, both of these solutions are "passive blocking" or "single-mechanism" sound absorption methods, making it difficult to balance noise reduction effectiveness with workability when dealing with complex environmental noise, especially low-frequency structural vibrations caused by wind and rain impacts on building exterior walls.

[0005] How to improve the ability of metallic paint to dissipate sound wave vibrations without significantly increasing the coating weight, affecting the large-area construction effect and the metallic texture appearance, and enabling the coating to have both decorative and sound insulation and noise reduction functions, is an unsolved technical problem in this field. Summary of the Invention

[0006] In order to improve the ability of metallic paint to dissipate sound wave vibrations without significantly increasing the coating weight, affecting the large-area construction effect and the metallic texture appearance, and to enable the coating to have both decorative and sound insulation and noise reduction functions, this application provides a sound-insulating textured metallic paint and its preparation method.

[0007] In the first aspect, this application provides a sound-insulating textured metallic paint, which adopts the following technical solution: A sound-insulating metallic paint includes a base paint, a protective adhesive solution, and a continuous phase; The base paint contains piezoelectric ceramic particles and phase change microcapsules in a weight ratio of (2-5):1; The piezoelectric ceramic particles have a particle size of 50-200 mesh, and the phase transition temperature of the phase change microcapsules is 30-45℃.

[0008] By adopting the above technical solution, the weight ratio, particle size and phase transition temperature of piezoelectric ceramic particles and phase change microcapsules are limited, so that the two are synergistically distributed in the coating film.

[0009] Piezoelectric ceramic particles with a particle size range of 50-200 mesh can effectively respond to the low-frequency vibrations commonly found on building exterior walls, and their particle size matches that of the aggregates in the formulation, ensuring that the particles form a skeletal support structure in the coating film and are fully stressed. If the particle size is too small, the particles are completely encapsulated by the emulsion, limiting their deformation; if the particle size is too large, the number of particles per unit volume is insufficient.

[0010] When sound waves act on the coating, the piezoelectric ceramic particles, acting as a high-modulus framework, experience strain mismatch with the surrounding organic matrix, leading to stress concentration and microslip in the interface region, increasing the scattering and dissipation paths of sound wave energy. Phase change microcapsules are distributed within the gaps between the piezoelectric ceramic particles and aggregates, with their phase change temperature selected between 30-45℃, coinciding with the summer sun exposure temperature range of exterior walls, ensuring the coating remains in a highly damped state within this operating temperature range.

[0011] The weight ratio is limited to (2-5):1. If the proportion of piezoelectric ceramics is too high, the excessive concentration of high-modulus fillers will damage the continuity and flexibility of the coating, reducing the overall damping performance. If the proportion is too low, the skeleton support will be insufficient, the strain concentration effect will be weakened, and it will be difficult to form an effective energy dissipation network. Only within the above ratio range can the piezoelectric ceramics and phase change microcapsules achieve synergy in terms of quantity and spatial distribution, thus realizing broadband sound insulation and noise reduction.

[0012] Furthermore, the piezoelectric ceramic particles are one or more of lead zirconate titanate, barium titanate, and potassium sodium niobate, and the surface of the piezoelectric ceramic particles is modified by a silane coupling agent or a titanate coupling agent.

[0013] By adopting the above technical solutions, the selection of piezoelectric ceramic materials directly affects the vibration-thermal conversion efficiency. Lead zirconate titanate (PZT) has a piezoelectric constant as high as 300-600 pC / N, exhibiting the best heat generation efficiency; barium titanate and potassium sodium niobate provide lead-free and environmentally friendly alternatives. However, inorganic piezoelectric ceramic particles are naturally incompatible with organic emulsion systems. Direct addition leads to agglomeration and sedimentation, and the weak interfacial bonding prevents the effective transfer of film deformation caused by acoustic waves to the interior of the piezoelectric ceramic. Surface coupling agent modification solves this problem: one end of the silane coupling agent or titanate coupling agent condenses with the hydroxyl groups on the piezoelectric ceramic surface to form a covalent bond, while the other end entangles or reacts with the emulsion polymer chains, forming an "inorganic-organic" bridge. The modified particles have reduced surface energy, achieving single-particle dispersion in the base paint and maximizing the interfacial area per unit mass; simultaneously, the strong interfacial bonding allows macroscopic film deformation to be effectively transferred to the surface of the piezoelectric ceramic particles, enhancing the interfacial strain concentration effect.

[0014] Furthermore, the core material of the phase change microcapsule is paraffin or fatty acid ester, and the shell material is melamine-formaldehyde resin, urea-formaldehyde resin, or polymethyl methacrylate.

[0015] By adopting the above technical solutions, the selection of the core and shell materials of the phase change microcapsules determines their heat absorption efficiency, cycle stability, and processing tolerance. Paraffin wax has a high latent heat of phase change of 200-250 J / g and is inexpensive, while fatty acid esters are biodegradable, both of which meet the sound insulation requirements of architectural coatings. However, the core material must be effectively sealed after melting; otherwise, leakage will lead to deterioration of the coating performance. Melamine-formaldehyde resin, urea-formaldehyde resin, and polymethyl methacrylate (PMMA) are characterized by their density, heat resistance, and solvent resistance, and can withstand the shear forces during high-speed dispersion and spraying of coatings, with the microcapsule breakage rate controlled below 5%. In particular, PMMA shell material has excellent weather resistance and is suitable for long-term use on outdoor exterior walls. The shell material thickness is controlled at 0.5-2 μm, which ensures the structural integrity of the microcapsules during coating processing and construction, while also allowing the core material to effectively respond to changes in ambient temperature.

[0016] Furthermore, the base paint comprises the following raw materials in parts by weight: 200-250 parts water, 1-5 parts bactericide, 3-8 parts dispersant, 1-5 parts defoamer, 5-10 parts cellulose, 250-300 parts emulsion, 0.5-2 parts multifunctional additive, 10-20 parts film-forming aid, 2-6 parts ethylene glycol, 3-8 parts protective colloid, 2-5 parts thickener, 250-350 parts aggregate, and 20-40 parts metal powder; The piezoelectric ceramic particles constitute 20-60% of the total weight of the aggregate.

[0017] By employing the above technical solution, water, cellulose, and emulsion constitute the continuous phase of the base paint. Cellulose provides thickening and suspending capabilities, preventing the sedimentation of denser piezoelectric ceramic particles. Dispersants and multifunctional additives ensure uniform dispersion of functional fillers. Film-forming aids and ethylene glycol regulate the minimum film-forming temperature, adapting to different seasonal application conditions. Protective colloids and thickeners provide thixotropic and shear-thinning properties for subsequent granulation processes. Piezoelectric ceramic particles, as functional aggregates, account for 20-60% of the total aggregate weight, providing both skeletal support and enhancing interfacial energy dissipation.

[0018] Furthermore, the protective colloid solution comprises the following raw materials in parts by weight: 900-1000 parts water, 2-5 parts bactericide, 20-30 parts protective colloid, 1-3 parts cellulose, 0.5-2 parts xanthan gum, and 0.5-2 parts multifunctional additive.

[0019] By adopting the above technical solution, the protective colloid solution, as the granulation medium for multicolor coatings, needs to provide suitable ionic strength and rheological properties to ensure stable dispersion, non-sticking, and non-aggregation of the base paint droplets. The protective colloid forms a "locked-in structure" gel in water. When stirred and sheared, the gel is broken down, allowing the base paint to drip in smoothly. After stirring stops, the gel recovers, locking the base paint particles in place. This is the core principle of multicolor coating granulation. The compounding of xanthan gum and cellulose is crucial: xanthan gum has pseudoplasticity and forms a dual thickening system with cellulose, providing high viscosity under low shear to prevent the sedimentation of high-density piezoelectric ceramic particles; simultaneously, it does not affect flowability under high shear, ensuring smooth application.

[0020] Furthermore, the continuous phase comprises the following raw materials in parts by weight: 40-60 parts water, 2-5 parts bactericide, 5-15 parts film-forming aid, 20-40 parts ethylene glycol, 1-4 parts multifunctional aid, 800-950 parts emulsion, and 3-8 parts thickener.

[0021] By adopting the above technical solution, the continuous phase, as the outer phase of the multicolor coating, is responsible for binding the base paint particles together to form a complete film, while also providing the coating with weather resistance, water resistance, and flexibility. A high emulsion content ensures the continuous phase has a high solids content, resulting in a dense film that completely encapsulates the base paint particles, which is the main guarantee of the coating's weather resistance. The ethylene glycol content is higher than conventional levels, lowering the freezing point to suit winter construction and providing plasticizing effects to increase coating flexibility, allowing the coating to adapt to the thermal expansion and contraction of the building substrate without cracking. Film-forming aids work synergistically with ethylene glycol to ensure continuous film formation of the emulsion during construction in different seasons. Thickeners adjust the viscosity of the continuous phase, ensuring a moderate overall viscosity after mixing with the base paint particles, preventing sagging during spraying. More importantly, the high emulsion content of the continuous phase itself is an elastic matrix with viscoelastic damping properties, forming a two-stage sound insulation mechanism combining macroscopic damping and microscopic energy dissipation with the composite fillers inside the base paint particles.

[0022] Furthermore, the aggregate comprises 80-120 mesh snow white and 150-200 mesh snow white in a weight ratio of (2.5-3.5):1.

[0023] By adopting the above technical solution, the aggregate gradation directly determines the texture, density, and sound wave propagation path of the coating. 80-120 mesh coarse aggregate forms the main body of the textured surface, creating micron-level protrusions after spraying, diffusely reflecting light and solving the industry problem of uneven coloring during large-area application of traditional flat metallic paints. 150-200 mesh fine aggregate fills the gaps between the coarse aggregate, making the coating denser and increasing the number of sound wave reflection interfaces within the coating. A coarse-to-fine ratio of 2.5-3.5:1 is close to the theoretical value for closest packing, resulting in the lowest porosity and optimal mechanical properties of the coating. More importantly, the piezoelectric ceramic particles (50-200 mesh) precisely cover the range of coarse and fine aggregates, forming a continuous gradation. The coarse aggregate provides a large reflective surface, while the fine aggregate, after filling, forms micro-channels that extend the sound wave propagation path. The piezoelectric ceramic particles are distributed among the various aggregate levels, increasing the coating's energy dissipation capacity.

[0024] Furthermore, the weight ratio of the base paint, protective adhesive solution, and continuous phase is (10-12):(5-6):(3-4).

[0025] By employing the above technical solutions, the base paint has the highest proportion (10-12 parts), ensuring that the base paint particles dominate in the dry film, with clear boundaries between particles and a significant textured finish. The protective colloid solution has a moderate proportion (5-6 parts), providing sufficient gelation environment to lock in the particle morphology while preventing excessive residue in the dry film—excessive residue during drying can migrate to the surface and affect gloss. The continuous phase has the lowest proportion (3-4 parts), just enough to cover the gaps between particles and bind them together without accumulating on the particle surface to form a smooth layer, thus maintaining the textured finish. At this proportion, each base paint particle acts as an independent vibration unit, with the internal piezoelectric ceramics and phase change microcapsules working together efficiently in the micro-region; the interfaces between particles further increase the sound wave reflection path; and the continuous phase, as an elastic matrix, provides macroscopic damping. The three phases form a triple sound insulation mechanism of "particle skeleton scattering, particle interface reflection, and continuous phase damping."

[0026] Secondly, this application provides a method for preparing a sound-insulating textured metallic paint, employing the following technical solution: A method for preparing a sound-insulating textured metallic paint includes the following steps: S1. Preparation of base paint: Disperse and mix the raw materials to obtain base paint; S2. Preparation of protective adhesive solution: Disperse and mix the raw materials to obtain a protective adhesive solution; S3. Preparation of continuous phase: Disperse and mix the raw materials to obtain a continuous phase; S4. Finished product mixing: Mix the base paint, protective colloid solution and continuous phase according to the weight ratio. First, adjust the color of the base paint, then add it to the protective colloid solution. Disperse the base paint into particles through dispersion. Finally, add the continuous phase and mix evenly to obtain the final product.

[0027] In summary, this application has the following beneficial effects: This application constructs a multi-layered energy dissipation network by simultaneously adding piezoelectric ceramic particles and phase change microcapsules to a base paint, and by limiting the weight ratio of the two, the particle size of the piezoelectric ceramic, and the phase change temperature of the phase change microcapsules. This achieves efficient and stable broadband sound insulation and noise reduction. The weighted sound insulation reaches 30.1-31.5 dB, and the damping loss factor reaches 0.145-0.163, demonstrating excellent sound insulation performance and achieving efficient and stable broadband sound insulation and noise reduction. Detailed Implementation

[0028] The present application will be further described in detail below with reference to the embodiments.

[0029] Example of raw material and intermediate preparation raw material It should be noted that: in the following examples, unless otherwise specified, the conditions shall be in accordance with conventional conditions or the manufacturer's recommended conditions; and the raw materials used in the following examples, unless otherwise specified, shall be from commercially available sources. Phase change microcapsules: Phase change microcapsules, Croda Industrial Chemicals, shell material: acrylic polymer; core material: bio-based phase change wax; phase change temperature (melting point): 32℃; crystallization temperature: 26℃; particle size (d90): 40μm; latent heat (melting): 175J / g; latent heat (crystallization): -175J / g; Phase change microcapsules II, Langfang Camft New Material Co., Ltd., shell material: melamine-formaldehyde resin or urea-formaldehyde resin; core material: paraffin-based phase change material; particle size: 40μm; phase change temperature: 40℃; core material content: 75wt% Phase change microcapsules III, Langfang Camft New Material Co., Ltd., shell material: melamine-formaldehyde resin or urea-formaldehyde resin; core material: paraffin-based phase change material; particle size: 40μm; phase change temperature: 20℃; Phase change microcapsules 4: Langfang Camft New Materials Co., Ltd., melamine-formaldehyde resin or urea-formaldehyde resin; core material: paraffin-based phase change material; particle size: 40μm; phase change temperature: 50℃; Bactericide: DMB bactericide; Dispersant: 123k potassium salt dispersant; Defoamer: AP7010 defoamer; Cellulose: HHBR-250 cellulose; Emulsion: AP4765 emulsion; Film-forming aid: Badifu film-forming aid; Multifunctional additive: KNE905 multifunctional additive; Protective adhesive: M4 protective adhesive; Thickener: SCT275 thickener; Metallic powder: Kuncai metallic powder; Piezoelectric ceramic particles: lead zirconate titanate (PZT), barium titanate (BaTiO3), potassium sodium niobate (KNN); when using, prepare a 2% ethanol / water solution with silane coupling agent (KH-550), adjust the pH to 5, add the piezoelectric ceramic particles, the solid-liquid ratio is 1.3 (g / mL), stir at 70℃ for 3 hours, filter, wash and dry.

[0030] Example Examples 1-3 A sound-insulating metallic paint, the preparation method of which is as follows: S1. Preparation of base paint: According to the proportions in Table 1, add 70 wt% of the total bactericide, dispersant, 60 wt% of the defoamer, and cellulose to water in sequence, and disperse at 1000 rpm for 8 minutes; then add ethylene glycol, film-forming aid, and multifunctional additive, and disperse at 1800 rpm for 12 minutes; then add the emulsion and stir evenly; subsequently add the pre-dispersed protective colloid aqueous solution and disperse at 1200 rpm for 8 minutes; finally, add the remaining defoamer, remaining bactericide, thickener, aggregate, metal powder, piezoelectric ceramic particles, and phase change microcapsules in sequence, and mix evenly at 1000 rpm to obtain the base paint, which is stored separately; S2. Preparation of protective adhesive solution: According to the proportions in Table 2, add 70 wt% of the total amount of bactericide, protective gum, cellulose, xanthan gum, and multifunctional additive to water, disperse at 1800 rpm for 50 minutes until there are no lumps, then add the remaining bactericide and water in sequence, stir evenly at 400 rpm to obtain a protective gum solution, and store it separately. S3. Preparation of the continuous phase: According to the proportions in Table 3, add bactericide, film-forming aid, ethylene glycol, and multifunctional additive to water, stir at 1800 rpm for 8 minutes, then add emulsion and mix well. Finally, slowly add the premixed thickener aqueous solution and stir at 1000 rpm for 8 minutes to obtain a continuous phase, which is stored separately. S4. Finished Product Mixing: Mix the base paint, protective colloid solution, and continuous phase in a weight ratio of 11:5:4. First, adjust the color of the base paint, then add it to the protective colloid solution and disperse it at 500 rpm for 3 minutes to disperse the base paint into particles. Finally, add the continuous phase and mix it evenly at 400 rpm to obtain the final product.

[0031] Table 1. Raw material ratio for examples 1-3 (kg) Among them, the piezoelectric ceramic particles are lead zirconate titanate treated with silane coupling agent, with a particle size of 50-200 mesh; the phase change microcapsules are phase change microcapsules one in the raw materials, with a phase change temperature of 32℃; the aggregates include 80-120 mesh snow white and 150-200 mesh snow white in a weight ratio of 3:1.

[0032] Table 2. Raw material ratio of protective colloid solution in Examples 1-3 (kg) Table 3. Continuous Phase Raw Material Proportions for Examples 1-3 (kg) Example 4 Unlike Example 2, in Example 4 the phase change microcapsules are phase change microcapsules II from the raw materials, and the phase change temperature is 40°C.

[0033] Example 5 Unlike Example 2, the amount of phase change microcapsules used in Example 5 was 60 kg.

[0034] Example 6 Unlike Example 2, the amount of phase change microcapsules used in Example 6 was 24 kg.

[0035] Example 7 Unlike Example 2, the aggregate in Example 7 is 80-120 mesh snow white.

[0036] Example 8 Unlike Example 2, the aggregate in Example 8 is 150-200 mesh snow white.

[0037] Example 9 Unlike Example 2, in Example 9 the aggregates include 80-120 mesh snow white and 150-200 mesh snow white in a weight ratio of 1:3.

[0038] Comparative Example Comparative Example 1 Unlike Example 1, in Comparative Example 1, piezoelectric ceramic particles and phase change microcapsules were replaced with an equal amount of aggregate.

[0039] Comparative Example 2 Unlike Example 1, in Comparative Example 2, the phase change microcapsules were replaced with an equal amount of aggregate.

[0040] Comparative Example 3 Unlike Example 1, in Comparative Example 3, piezoelectric ceramic particles were replaced with an equal amount of aggregate.

[0041] Comparative Example 4 Unlike Example 1, the amount of phase change microcapsules used in Comparative Example 4 was 23 kg.

[0042] Comparative Example 5 Unlike Example 1, the amount of phase change microcapsules used in Comparative Example 5 was 140 kg.

[0043] Comparative Example 6 Unlike Example 1, the piezoelectric ceramic particles in Comparative Example 6 have a particle size of 10-30 mesh.

[0044] Comparative Example 7 Unlike Example 1, in Comparative Example 7, the phase change microcapsules were phase change microcapsules three from the raw materials, and the phase change temperature was 20°C.

[0045] Comparative Example 8 Unlike Example 1, in Comparative Example 8, the phase change microcapsules were phase change microcapsules four from the raw materials, and the phase change temperature was 50°C.

[0046] Performance testing The metallic paints obtained in the examples and comparative examples were applied to the substrate in two coats, with the dry film thickness controlled at 1.5 mm. The following performance tests were then conducted, and the results are shown in Table 4: Weighted sound insulation (Rw): Refer to GB / T45305.2-2025 "Laboratory measurement of sound insulation of acoustic building components - Part 2: Measurement of airborne sound insulation", the substrate is 10mm thick cement fiberboard (1m×1m), the dry film thickness of the coating is 1.5mm, the test frequency range is 100-2000Hz, and the weighted sound insulation Rw (dB) is calculated.

[0047] Damping loss factor (η): Refer to GB / T18258-2000 "Test Method for Damping Performance of Damping Materials", adopt the free decay method (cantilever beam resonance method), test temperature 25℃, frequency 500Hz, and calculate the loss factor η (dimensionless).

[0048] Adhesion: Refer to GB / T9286-2021 "Paints and Varnishes Cross-cut Test", cross-cut method (1mm interval), rating 0-5.

[0049] Table 4 Performance Test Results It can be seen that: Comparative Example 1, without the addition of piezoelectric ceramics and phase change microcapsules, achieved a sound insulation level of only 21.3 dB and a loss factor of 0.051, which is within the range of conventional water-based metallic paints and cannot meet the sound insulation requirements of buildings. Comparative Example 2, with piezoelectric ceramics alone, achieved a sound insulation level of 24.8 dB and a loss factor of 0.083. Comparative Example 3, with phase change microcapsules alone, achieved a sound insulation level of 22.9 dB and a loss factor of 0.058. Both are significantly lower than Example 1, indicating that neither material alone can effectively dissipate sound energy.

[0050] Comparative Example 4 had a sound insulation of 26.5 dB and a loss factor of 0.091; Comparative Example 5 had a sound insulation of 26.2 dB and a loss factor of 0.088. Both were significantly lower than Examples 1-6, indicating that the synergistic effect was lost when the ratio of piezoelectric ceramic particles to phase change microcapsules deviated from the range of (2-5):1.

[0051] Comparative Example 6 had a sound insulation level of only 23.8 dB and a loss factor of 0.066, which was far lower than that of Examples 1-6. The reason is that the number of large-diameter particles per unit volume is insufficient, and they damage the density of the coating, resulting in a serious deterioration of the sound insulation performance.

[0052] Comparative Example 7 achieved a sound insulation level of 24.5 dB with a loss factor of 0.072; Comparative Example 8 achieved a sound insulation level of 25.1 dB with a loss factor of 0.078. Both were significantly lower than those of Examples 1-4, demonstrating that a phase change temperature of 30-45°C provides better sound insulation. This may be because this temperature range matches the actual operating temperature of the exterior wall.

[0053] In Comparative Example 7, the core material was already liquid under a 25°C test environment, resulting in a decrease in the shell material modulus and a weakening of the particle skeleton support. In Comparative Example 8, the core material was solid at room temperature, but the phase transition temperature was too high, causing the shell material to soften excessively under high summer temperatures, leading to a decrease in coating stiffness. The 30-45°C phase transition temperatures of Examples 1-4 enabled the coating to maintain appropriate stiffness at room temperature and enter a high-damping state under summer operating temperatures.

[0054] Example 7 showed a sound insulation level of 28.5 dB for coarse aggregate only, and Example 8 showed a sound insulation level of 28.1 dB for fine aggregate only, both lower than Example 2. This indicates that aggregate gradation also contributes to sound insulation performance, and the combination of coarse and fine aggregates can optimize the sound wave propagation path and coating density.

[0055] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A sound-insulating textured metallic paint, characterized in that, It is composed of separately stored base paint, protective colloid solution and continuous phase mixture; The base paint contains piezoelectric ceramic particles and phase change microcapsules in a weight ratio of (2-5):1; The particle size of the piezoelectric ceramic particles is 50-200 mesh, and the phase transition temperature of the phase change microcapsules is 30-45℃. The piezoelectric ceramic particles are one or more of lead zirconate titanate, barium titanate, and potassium sodium niobate, and the surface of the piezoelectric ceramic particles is modified by a silane coupling agent or a titanate coupling agent.

2. The sound-insulating textured metallic paint according to claim 1, characterized in that, The core material of the phase change microcapsules is paraffin or fatty acid ester, and the shell material is melamine-formaldehyde resin, urea-formaldehyde resin or polymethyl methacrylate.

3. The sound-insulating textured metallic paint according to claim 1, characterized in that, The base paint comprises the following raw materials in parts by weight: 200-250 parts water, 1-5 parts bactericide, 3-8 parts dispersant, 1-5 parts defoamer, 5-10 parts cellulose, 250-300 parts emulsion, 0.5-2 parts multifunctional additive, 10-20 parts film-forming aid, 2-6 parts ethylene glycol, 3-8 parts protective colloid, 2-5 parts thickener, 250-350 parts aggregate, and 20-40 parts metal powder; The piezoelectric ceramic particles constitute 20-60% of the total weight of the aggregate.

4. The sound-insulating textured metallic paint according to claim 1, characterized in that, The protective colloid solution comprises the following raw materials in parts by weight: 900-1000 parts water, 2-5 parts bactericide, 20-30 parts protective colloid, 1-3 parts cellulose, 0.5-2 parts xanthan gum, and 0.5-2 parts multifunctional additive.

5. The sound-insulating textured metallic paint according to claim 1, characterized in that, The continuous phase comprises the following raw materials in parts by weight: 40-60 parts water, 2-5 parts bactericide, 5-15 parts film-forming aid, 20-40 parts ethylene glycol, 1-4 parts multifunctional aid, 800-950 parts emulsion, and 3-8 parts thickener.

6. The sound-insulating textured metallic paint according to claim 3, characterized in that, The aggregates include 80-120 mesh snow white and 150-200 mesh snow white in a weight ratio of (2.5-3.5):

1.

7. The sound-insulating textured metallic paint according to claim 1, characterized in that, The weight ratio of the base paint, protective adhesive solution, and continuous phase is (10-12):(5-6):(3-4).

8. A method for preparing a sound-insulating textured metallic paint as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Preparation of base paint: Disperse and mix the raw materials to obtain base paint; S2. Preparation of protective adhesive solution: Disperse and mix the raw materials to obtain a protective adhesive solution; S3. Preparation of continuous phase: Disperse and mix the raw materials to obtain a continuous phase; S4. Finished product mixing: Mix the base paint, protective colloid solution and continuous phase according to the weight ratio. First, adjust the color of the base paint, then add it to the protective colloid solution. Disperse the base paint into particles through dispersion. Finally, add the continuous phase and mix evenly to obtain the final product.

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