Environment-friendly high-performance automotive water-based damping coating and preparation method thereof

Abstract

According to the technical scheme, the environment-friendly high-performance water-based damping coating for the vehicle comprises polymer emulsion, auxiliaries and filler, the polymer emulsion comprises acrylate emulsion and butyl latex, and the auxiliaries comprise a defoaming agent, a wetting dispersant, a humectant, a bactericide, a plasticizer, water-based black slurry and a thickening agent. The filler comprises epoxy powder, an epoxy curing agent, heavy calcium carbonate, sericite, flake graphite, starch, bentonite, expandable microspheres and diatomite. The butyl latex and the epoxy powder are adopted for synergistic modification, so that the damping performance of the coating in a whole temperature range can be further improved without sacrificing the damping performance at a specific temperature, the problems that a common water-based damping coating in the market is narrow in damping temperature range, and the high-temperature damping performance and the low-temperature damping performance are difficult to obtain at the same time are solved, and the damping performance of the coating can be effectively improved; the enterprise standard is met, and the water resistance and the adhesive force are further improved.

Description

Technical Field

[0001] The invention relates to the technical field of damping materials, in particular to an environmentally friendly high-performance automotive water-based damping coating and a preparation method thereof. Background Art

[0002] Damping materials are widely used in the automotive industry, mostly in car bodies, chassis, doors, ceilings and other parts. They improve the NVH performance of vehicles by suppressing the vibration of metal sheets and blocking noise transmission. Water-based damping coatings are sprayable damping materials made of water-based acrylic resin as the main material, combined with solid fillers and a variety of additives. In recent years, with the rapid development of China's automobile industry and the promotion of environmental protection policies, the market demand for automotive water-based damping coatings has continued to grow. The market size of traditional asphalt damping panels will gradually decrease due to VOC emissions, while water-based damping coatings are favored by car companies for their environmental protection, low pollution, high weather resistance and excellent vibration and noise reduction performance. It has good damping effect, is safe and environmentally friendly, has low density, is conducive to lightweight design, and is an ideal material to replace traditional asphalt damping panels.

[0003] At present, water-based damping coatings have the problem of narrow damping temperature range, and poor damping effects at low and high temperatures. Although the damping temperature range can be widened by compounding acrylic emulsions with different damping effects, there is still the problem of difficulty in taking into account both high and low temperature damping performance. Specifically, in order to improve the high temperature damping performance, the proportion of emulsions with good high temperature damping effects is increased, and the low temperature damping performance will be significantly reduced; conversely, if the proportion of emulsions with good low temperature damping effects is increased, the high temperature damping effect cannot meet the needs of car companies. In addition, the insufficient cross-linking structure formed by water-based damping coatings during high temperature baking will also make it difficult for the coating strength and adhesion to meet long-term use requirements. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide an environmentally friendly, high-performance automotive water-based damping coating and a preparation method thereof.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] An environmentally friendly high-performance automotive water-based damping coating comprises a polymer emulsion, an additive and a filler. The polymer emulsion comprises an acrylate emulsion and a butyl latex. The additive comprises a defoamer, a wetting dispersant, a humectant, a bactericide, a plasticizer, a water-based black slurry and a thickener. The filler comprises an epoxy powder, an epoxy curing agent, heavy calcium carbonate, sericite, flake graphite, starch, bentonite, expandable microspheres and diatomaceous earth.

[0007] Preferably, the acrylate emulsion in the polymer emulsion includes acrylate emulsion A, acrylate emulsion B, and acrylate emulsion C. The glass transition temperature of acrylate emulsion A is -15°C, and the damping temperature range is 5 - 15°C. The glass transition temperature of acrylate emulsion B is 0°C, and the damping temperature range is 20 - 30°C. The glass transition temperature of acrylate emulsion C is 15°C, and the damping temperature range is 40 - 55°C. The butyl latex in the polymer emulsion is aqueous butyl latex.

[0008] Preferably, the polymer emulsion accounts for 25 - 45%, the auxiliary agent accounts for 1 - 10%, and the filler accounts for 50 - 75%.

[0009] Preferably, the component ratio of the polymer emulsion is 40 - 80 parts of acrylate emulsion A, 90 - 150 parts of acrylate emulsion B, 40 - 80 parts of acrylate emulsion C, and 20 - 40 parts of aqueous butyl latex.

[0010] Preferably, the component ratio of the auxiliary agent is 1 - 5 parts of defoamer, 2 - 10 parts of wetting and dispersing agent, 2 - 10 parts of humectant, 0.5 - 2 parts of bactericide, 1 - 5 parts of plasticizer, 0.5 - 2 parts of aqueous black paste, and 0 - 8 parts of thickener.

[0011] Preferably, the component ratio in the filler is 10 - 50 parts of epoxy powder, 1 - 10 parts of epoxy curing agent, 200 - 500 parts of heavy calcium carbonate, 10 - 50 parts of sericite, 10 - 50 parts of flake graphite, 10 - 40 parts of starch, 0.5 - 5 parts of bentonite, 0.5 - 5 parts of expandable microspheres, and 10 - 50 parts of diatomite.

[0012] In addition, the present application also provides a preparation method for preparing the above-mentioned environmentally friendly high-performance waterborne damping coating for vehicles, including the following steps:

[0013] Step 1: Add all the acrylate emulsions and butyl latex into the batching tank in sequence, and uniformly stir at room temperature to obtain liquid mixture I;

[0014] Step 2: Add the defoamer, wetting and dispersing agent, humectant, bactericide, plasticizer, and aqueous black paste into liquid mixture I in accordance with the ratio in sequence. While adding the materials, disperse them with a dispersion disc. After adding all the auxiliary agents, continue to disperse at the same rotation speed to obtain liquid mixture II;

[0015] Step 3: Add the epoxy powder, epoxy curing agent, heavy calcium carbonate, sericite, flake graphite, starch, bentonite, expandable microspheres, and diatomite into liquid mixture II in accordance with the ratio in sequence. While adding the materials, disperse them with a dispersion disc. After adding all the fillers, continue to disperse at the same rotation speed to obtain a solid-liquid mixture;

[0016] Step 4: Add the thickener to the solid-liquid mixture, disperse it with a dispersion disk while adding the material, and stir at the same rotation speed for 30 min after the addition of the thickener is completed. Adjust the viscosity of the solid-liquid mixture within the range of 75-100 Pa·s, and discharge to obtain the waterborne damping coating.

[0017] Preferably, the butyl latex is an aqueous butyl latex obtained by dissolving butyl rubber in a solvent, followed by emulsification, distillation, and concentration.

[0018] Preferably, in Step 1, use a dispersion disk to uniformly stir at a rotation speed of 400 r / min for 20 min to obtain Liquid Mixture I; in Step 2, use a dispersion disk to continue dispersing at a rotation speed of 600 r / min for 20 min after the addition of the additives is completed to obtain Liquid Mixture II; in Step 3, use a dispersion disk to continue dispersing at a rotation speed of 800 r / min for 30 min after the addition of the filler is completed to obtain the solid-liquid mixture; in Step 4, use a dispersion disk to continue stirring at a rotation speed of 800 r / min for 30 min after the addition of the thickener is completed to obtain the waterborne damping coating.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] The present invention uses aqueous butyl latex and epoxy powder for synergistic modification, which can improve the low-temperature damping performance and high-temperature damping performance of the coating simultaneously, and can further enhance the water resistance and adhesion of the coating. It is suitable for long-term use under complex working conditions. In addition, the synergistic modification of aqueous butyl latex and epoxy powder can further improve the damping performance of the coating in the full temperature range without sacrificing the damping performance at a specific temperature, solving the problems of narrow damping temperature range and difficulty in obtaining both high and low temperature damping performances existing in common waterborne damping coatings on the market, effectively enhancing the damping performance of the coating, meeting the enterprise standards, and further enhancing the water resistance and adhesion, and improving the comprehensive use effect of the coating. Detailed Embodiments

[0021] It is easy to understand that according to the technical solution of the present invention, without changing the essence of the present invention, those of ordinary skill in the art can propose various interchangeable structural forms and implementation methods. Therefore, the following detailed embodiments are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction on the technical solution of the present invention.

[0022] As an environment-friendly and high-performance water-based damping coating for vehicles of the present invention, it includes a polymer emulsion accounting for 25-45%, an auxiliary agent accounting for 1-10%, and a filler accounting for 50-75%. The polymer emulsion includes acrylate emulsion A, acrylate emulsion B, acrylate emulsion C, and butyl latex. The glass transition temperature of acrylate emulsion A is -15°C, and the damping temperature range is 5-15°C. The glass transition temperature of acrylate emulsion B is 0°C, and the damping temperature range is 20-30°C. The glass transition temperature of acrylate emulsion C is 15°C, and the damping temperature range is 40-55°C. The butyl latex is a water-based butyl latex, which is obtained by dissolving butyl rubber in a solvent, emulsifying, distilling, and concentrating. It uses water as a dispersion medium and can achieve stable blending with acrylate emulsion, avoiding the phase separation problem caused by solvent incompatibility of ordinary rubber, thereby improving the damping performance of the coating. The auxiliary agent includes an antifoaming agent, a wetting and dispersing agent, a moisturizing agent, a bactericide, a plasticizer, a water-based black paste, and a thickener. The filler includes epoxy powder, epoxy curing agent, heavy calcium carbonate, sericite, flake graphite, starch, bentonite, expandable microspheres, and diatomite.

[0023] Example 1 (specific components are as follows):

[0024] 50 parts of acrylate emulsion A, 110 parts of acrylate emulsion B, 50 parts of acrylate emulsion C, 30 parts of water-based butyl latex, 1.5 parts of antifoaming agent, 8 parts of wetting and dispersing agent, 8 parts of moisturizing agent, 1 part of bactericide, 4 parts of plasticizer, 0.5 part of water-based black paste, 3 parts of thickener, 25 parts of epoxy powder, 5 parts of epoxy curing agent, 300 parts of heavy calcium carbonate, 30 parts of sericite, 30 parts of flake graphite, 30 parts of starch, 3 parts of bentonite, 1.5 parts of expandable microspheres, 40 parts of diatomite.

[0025] Example 2 (specific components are as follows):

[0026] 50 parts of acrylate emulsion A, 110 parts of acrylate emulsion B, 50 parts of acrylate emulsion C, 30 parts of water-based butyl latex, 1.5 parts of antifoaming agent, 8 parts of wetting and dispersing agent, 8 parts of moisturizing agent, 1 part of bactericide, 4 parts of plasticizer, 0.5 part of water-based black paste, 3 parts of thickener, 330 parts of heavy calcium carbonate, 30 parts of sericite, 30 parts of flake graphite, 30 parts of starch, 3 parts of bentonite, 1.5 parts of expandable microspheres, 40 parts of diatomite.

[0027] Example 3 (specific components are as follows):

[0028] 60 parts of acrylate emulsion A, 120 parts of acrylate emulsion B, 60 parts of acrylate emulsion C, 1.5 parts of defoamer, 8 parts of wetting and dispersing agent, 8 parts of humectant, 1 part of bactericide, 4 parts of plasticizer, 0.5 part of aqueous black paste, 3 parts of thickener, 25 parts of epoxy powder, 5 parts of epoxy curing agent, 300 parts of heavy calcium carbonate, 30 parts of sericite, 30 parts of flake graphite, 30 parts of starch, 3 parts of bentonite, 1.5 parts of expandable microspheres, 40 parts of diatomite.

[0029] Example 4 (specific components are as follows):

[0030] 45 parts of acrylate emulsion A, 90 parts of acrylate emulsion B, 45 parts of acrylate emulsion C, 60 parts of aqueous butyl latex, 1.5 parts of defoamer, 8 parts of wetting and dispersing agent, 8 parts of humectant, 1 part of bactericide, 4 parts of plasticizer, 0.5 part of aqueous black paste, 3 parts of thickener, 330 parts of heavy calcium carbonate, 30 parts of sericite, 30 parts of flake graphite, 30 parts of starch, 3 parts of bentonite, 1.5 parts of expandable microspheres, 40 parts of diatomite.

[0031] Example 5 (specific components are as follows):

[0032] 60 parts of acrylate emulsion A, 120 parts of acrylate emulsion B, 60 parts of acrylate emulsion C, 1.5 parts of defoamer, 8 parts of wetting and dispersing agent, 8 parts of humectant, 1 part of bactericide, 4 parts of plasticizer, 0.5 part of aqueous black paste, 3 parts of thickener, 50 parts of epoxy powder, 10 parts of epoxy curing agent, 270 parts of heavy calcium carbonate, 30 parts of sericite, 30 parts of flake graphite, 30 parts of starch, 3 parts of bentonite, 1.5 parts of expandable microspheres, 40 parts of diatomite.

[0033] Example 6 (specific components are as follows):

[0034] 45 parts of acrylate emulsion A, 90 parts of acrylate emulsion B, 45 parts of acrylate emulsion C, 60 parts of aqueous butyl latex, 1.5 parts of defoamer, 8 parts of wetting and dispersing agent, 8 parts of humectant, 1 part of bactericide, 4 parts of plasticizer, 0.5 part of aqueous black paste, 3 parts of thickener, 50 parts of epoxy powder, 10 parts of epoxy curing agent, 270 parts of heavy calcium carbonate, 30 parts of sericite, 30 parts of flake graphite, 30 parts of starch, 3 parts of bentonite, 1.5 parts of expandable microspheres, 40 parts of diatomite.

[0035] Example 7 (specific components are as follows):

[0036] 50 parts of acrylate emulsion A, 110 parts of acrylate emulsion B, 80 parts of acrylate emulsion C, 30 parts of aqueous butyl latex, 1.5 parts of defoamer, 8 parts of wetting and dispersing agent, 8 parts of humectant, 1 part of fungicide, 4 parts of plasticizer, 0.5 part of aqueous black paste, 3 parts of thickener, 330 parts of heavy calcium carbonate, 30 parts of sericite, 30 parts of flake graphite, 30 parts of starch, 3 parts of bentonite, 1.5 parts of expandable microspheres, 40 parts of diatomite.

[0037] Example 8 (specific components are as follows):

[0038] 90 parts of acrylate emulsion A, 120 parts of acrylate emulsion B, 60 parts of acrylate emulsion C, 1.5 parts of defoamer, 8 parts of wetting and dispersing agent, 8 parts of humectant, 1 part of fungicide, 4 parts of plasticizer, 0.5 part of aqueous black paste, 3 parts of thickener, 25 parts of epoxy powder, 5 parts of epoxy curing agent, 300 parts of heavy calcium carbonate, 30 parts of sericite, 30 parts of flake graphite, 30 parts of starch, 3 parts of bentonite, 1.5 parts of expandable microspheres, 40 parts of diatomite.

[0039] Comparative Example 1 (specific components are as follows):

[0040] 60 parts of acrylate emulsion A, 120 parts of acrylate emulsion B, 60 parts of acrylate emulsion C, 1.5 parts of defoamer, 8 parts of wetting and dispersing agent, 8 parts of humectant, 1 part of fungicide, 4 parts of plasticizer, 0.5 part of aqueous black paste, 3 parts of thickener, 330 parts of heavy calcium carbonate, 30 parts of sericite, 30 parts of flake graphite, 30 parts of starch, 3 parts of bentonite, 1.5 parts of expandable microspheres, 40 parts of diatomite.

[0041] Comparative Example 2 (specific components are as follows):

[0042] 60 parts of acrylate emulsion A, 120 parts of acrylate emulsion B, 90 parts of acrylate emulsion C, 1.5 parts of defoamer, 8 parts of wetting and dispersing agent, 8 parts of humectant, 1 part of fungicide, 4 parts of plasticizer, 0.5 part of aqueous black paste, 3 parts of thickener, 330 parts of heavy calcium carbonate, 30 parts of sericite, 30 parts of flake graphite, 30 parts of starch, 3 parts of bentonite, 1.5 parts of expandable microspheres, 40 parts of diatomite.

[0043] Comparative Example 3 (specific components are as follows):

[0044] 90 parts of acrylate emulsion A, 120 parts of acrylate emulsion B, 60 parts of acrylate emulsion C, 1.5 parts of defoamer, 8 parts of wetting and dispersing agent, 8 parts of humectant, 1 part of fungicide, 4 parts of plasticizer, 0.5 part of aqueous black paste, 3 parts of thickener, 330 parts of heavy calcium carbonate, 30 parts of sericite, 30 parts of flake graphite, 30 parts of starch, 3 parts of bentonite, 1.5 parts of expandable microspheres, 40 parts of diatomite.

[0045] Flowability test: Apply a wet film sample of a certain specification on an electrophoresis test plate. Place it vertically in this state for 30 minutes and observe whether there is a flow phenomenon. Record the sag amount of the wet film.

[0046] Adhesion test: Apply a wet film sample of a certain specification on an electrophoresis test plate. Bake it at 140 °C for 20 minutes, then leave it at room temperature for 24 hours. Use a blade to cut two parallel lines with a spacing of 5 mm on the dry film. It is required that the blade edge just penetrates the coating and touches the substrate during cutting. Peel the coating from the thicker end by the tearing method. The judgment criteria are as follows:

[0047] Grade 0: Good adhesion, 100% of the material remains on the test plate and tears itself.

[0048] Grade 1: Sufficient adhesion, more than 90% of the material remains on the test plate, and there is only a little detachment.

[0049] Grade 2: Part of the adhesion remains on the test plate.

[0050] Grade 3: No adhesion, the material has no adhesion to the test plate or is very soft and can be easily completely detached from the test plate.

[0051] Water resistance test: Apply a wet film sample of a certain specification on an electrophoresis test plate. Bake it at 140 °C for 20 minutes. Immerse the baked sample in water at 40 °C for 24 hours. Evaluate the water resistance of the sample according to the appearance and adhesion changes of the sample before and after immersion.

[0052] Damping performance: Prepare a damping spline with a certain specification and a surface density of 3.0 kg / m2 on a body sheet of a certain specification. Bake it at 140 °C for 20 minutes. After cooling, clamp the sample to a cantilever beam damping measuring instrument and record the corresponding damping factors at temperatures of -20 °C, 0 °C, 20 °C, 40 °C, and 60 °C respectively. The test results are shown in the attached table.

[0053]

[0054]

[0055] As can be seen from the test results in the attached table, the environmentally friendly high-performance waterborne damping coating of the present invention uses waterborne butyl latex and epoxy powder for synergistic modification, which can improve the low-temperature damping performance and high-temperature damping performance of the coating at the same time, and can further enhance the water resistance and adhesion of the coating. It is suitable for long-term use under complex working conditions. Comparative Example 2 and Comparative Example 3 show that only by increasing the proportion of a single emulsion cannot improve the low-temperature damping performance and high-temperature damping performance of the coating at the same time, and the adhesion decreases. The synergistic modification of waterborne butyl latex and epoxy powder adopted in the present invention can further improve the damping performance of the coating in the full temperature range without sacrificing the damping performance at a specific temperature, solve the problem that the common waterborne damping coatings on the market have a narrow damping temperature range and it is difficult to have both high and low temperature damping performances, effectively improve the damping performance of the coating, meet the enterprise standards, and further enhance the water resistance and adhesion, and improve the comprehensive use effect of the coating.

[0056] When preparing the above coating, Step 1: Add all the acrylate emulsion and butyl latex into the batching tank in sequence, and use a dispersion disk to uniformly stir at a speed of 400 r / min at room temperature for 20 min to obtain a liquid mixture I;

[0057] Step 2: Add the defoamer, wetting and dispersing agent, humectant, bactericide, plasticizer and waterborne black paste into the liquid mixture I in sequence, and disperse while adding the materials with a dispersion disk. The rotation speed of the dispersion disk is 600 r / min. After the addition of the additives is completed, continue to disperse at the same speed for 20 min to obtain a liquid mixture II;

[0058] Step 3: Add the epoxy powder, epoxy curing agent, sericite, flaky graphite, starch, bentonite, expandable microspheres, diatomite and heavy calcium carbonate into the liquid mixture II in sequence, and disperse while adding the materials with a dispersion disk. The rotation speed of the dispersion disk is 800 r / min. After the addition of the fillers is completed, continue to disperse at the same speed for 30 min to obtain a solid-liquid mixture;

[0059] Step 4: Add the thickener into the solid-liquid mixture, and disperse while adding the materials with a dispersion disk. The rotation speed of the dispersion disk is 800 r / min. After the addition of the thickener is completed, continue to stir at the same speed for 30 min to adjust the viscosity of the solid-liquid mixture within the range of 75-100 Pa·s, and discharge to obtain the environmentally friendly high-performance waterborne damping coating.

[0060] The technical scope of the present invention is not limited to the content described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. An environmentally friendly high-performance automotive water-based damping coating, characterized in that: It includes polymer emulsion, additives and fillers. Polymer emulsion includes acrylic emulsion and butyl latex. Additives include defoamer, wetting dispersant, humectant, bactericide, plasticizer, water-based black slurry and thickener. Fillers include epoxy powder, epoxy curing agent, heavy calcium carbonate, sericite, flake graphite, starch, bentonite, expandable microspheres and diatomaceous earth.

2. The environmentally friendly high-performance automotive water-based damping coating according to claim 1, characterized in that: The acrylic emulsion in the polymer emulsion includes acrylic emulsion A, acrylic emulsion B and acrylic emulsion C. The glass transition temperature of acrylic emulsion A is -15°C and the damping temperature range is 5-15°C. The glass transition temperature of acrylic emulsion B is 0°C and the damping temperature range is 20-30°C. The glass transition temperature of acrylic emulsion C is 15°C and the damping temperature range is 40-55°C. The butyl latex in the polymer emulsion is water-based butyl latex.

3. The environmentally friendly high-performance automotive water-based damping coating and its preparation method according to claim 2, characterized in that: Polymer emulsion accounts for 25-45%, additives account for 1-10%, and fillers account for 50-75%.

4. The environmentally friendly high-performance automotive water-based damping coating according to claim 3, characterized in that: The components of the polymer emulsion are 40 to 80 parts of acrylate emulsion A, 90 to 150 parts of acrylate emulsion B, 40 to 80 parts of acrylate emulsion C, and 20 to 40 parts of water-based butyl latex.

5. The environmentally friendly high-performance automotive water-based damping coating according to claim 4, characterized in that: The components of the additives are 1 to 5 parts of defoaming agent, 2 to 10 parts of wetting and dispersing agent, 2 to 10 parts of humectant, 0.5 to 2 parts of bactericide, 1 to 5 parts of plasticizer, 0.5 to 2 parts of water-based black slurry, and 0 to 8 parts of thickener.

6. The environmentally friendly high-performance automotive water-based damping coating according to claim 5, characterized in that: The components in the filler are 10 to 50 parts of epoxy powder, 1 to 10 parts of epoxy curing agent, 200 to 500 parts of heavy calcium carbonate, 10 to 50 parts of sericite, 10 to 50 parts of flake graphite, 10 to 40 parts of starch, 0.5 to 5 parts of bentonite, 0.5 to 5 parts of expandable microspheres, and 10 to 50 parts of diatomaceous earth.

7. A method for preparing an environmentally friendly high-performance automotive water-based damping coating, characterized in that: The following steps are included: Step 1: Add all the acrylic emulsion and butyl latex into a batching tank in sequence, and stir evenly at room temperature to obtain a liquid mixture I; Step 2: Add defoamer, wetting dispersant, humectant, bactericide, plasticizer and aqueous black slurry to liquid mixture I in order according to the proportion, and disperse with a dispersing disk while adding the materials. After the addition of the additives, continue to disperse at the same speed to obtain liquid mixture II; Step 3, adding epoxy powder, epoxy curing agent, heavy calcium carbonate, sericite, flake graphite, starch, bentonite, expandable microspheres and diatomaceous earth to the liquid mixture II in order according to the proportion, dispersing with a dispersing disk while adding the materials, and continuing to disperse at the same speed after the addition of the filler to obtain a solid-liquid mixture; Step 4: Add the thickener to the solid-liquid mixture and disperse it with a dispersing disk while adding the materials. After the thickener is added, stir at the same speed for 30 minutes to adjust the viscosity of the solid-liquid mixture to within the range of 75 to 100 Pa·s, and obtain the water-based damping coating.

8. The method for preparing an environmentally friendly high-performance automotive water-based damping coating according to claim 7, characterized in that: Butyl latex is a water-based butyl latex obtained by dissolving butyl rubber in a solvent, emulsifying, distilling and concentrating.

9. The method for preparing an environmentally friendly high-performance automotive water-based damping coating according to claim 7, characterized in that: In step 1, the liquid mixture I is uniformly stirred at a speed of 400 r / min with a dispersion disk for 20 minutes to obtain a liquid mixture, in step 2, the liquid mixture II is continuously dispersed at a speed of 600 r / min after the addition of the additive is completed, in step 3, the solid-liquid mixture is continuously dispersed at a speed of 800 r / min with a dispersion disk for 30 minutes after the addition of the filler is completed to obtain a solid-liquid mixture, and in step 4, the water-based damping coating is continuously stirred at a speed of 800 r / min with a dispersion disk for 30 minutes after the addition of the thickener is completed to obtain a dispersion disk.

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