Skin-touch art coating and preparation process thereof

Abstract

The invention relates to the technical field of coatings, and particularly discloses a skin-touch art coating and a preparation process thereof. The invention relates to a skin-touch art coating which is prepared from the following raw materials in parts by weight: 5-10 parts of water, 20-40 parts of skin-touch resin, 10-30 parts of emulsion, 3-10 parts of hand feeling powder, 0.5-2 parts of an aldehyde removal aid, 1-5 parts of negative ion powder, 10-20 parts of natural pearl shell color pieces, 1-2 parts of other aids and 0.8-1.2 parts of modified composite fibers, the preparation process comprises the following steps: stirring and mixing water and other aids, adding the hand feeling powder in the stirring process, reducing the stirring speed, adding the skin feeling resin and the emulsion, mixing and dispersing, adding the natural pearl shell color sheets and the modified composite fibers, mixing, and finally adding the formaldehyde removal aid and the negative ion powder, and mixing. A coating formed by applying the skin-touch artistic paint is not prone to generating tiny cracks in a severe temperature change environment, and excellent skin-touch stability can be shown.

Description

Technical Field

[0001] The present application relates to the technical field of coatings, and more specifically, to a skin-friendly art coating and its preparation process. Background Art

[0002] Art coatings are a new type of wall decoration material that combines the advantages of traditional coatings and artistic elements, providing a more colorful choice for wall decoration. The skin-friendly art coating has an extremely smooth handfeel, as if touching the delicate and real texture of genuine leather, bringing a natural and comfortable feeling to users. This unique touch makes it highly favored in the market.

[0003] The raw materials for preparing the skin-friendly art coating mainly include resin, filler, pigment, water, and additives such as dispersant, leveling agent, and preservative. Among them, the resin forms the main body of the coating, enabling the coating to firmly adhere to the surface of the object to be coated and form a continuous film; the filler can build the skin-friendly layer and enhance the physical properties; the pigment can provide visual and protective effects; water is used as a solvent to replace organic volatile compounds, reducing environmental pollution and simultaneously adjusting the viscosity of the coating for construction; additives such as dispersant, leveling agent, and preservative play an important role in the process of forming the coating film and its durability; and through the synergistic effect of the above raw materials, the skin-friendly art coating has unique colors, textures, and textures, showing excellent skin-friendly performance in actual application and bringing high decorative effects and personalized styles.

[0004] Regarding the above related technologies, the inventor believes that during the application of the skin-friendly art coating, it will inevitably be affected by a drastic temperature change environment. Especially in plateau areas, the temperature difference between day and night is large, and this kind of influence is more common; in a drastic temperature change environment, the repeated expansion and contraction of the substrate and the coating will cause stress accumulation, easily leading to coating cracking. This kind of cracking is often tiny cracks that are invisible to the naked eye. Although it will not affect the overall appearance of the coating, it will greatly reduce the skin-friendly feeling when touching the coating.

[0005] Therefore, there is an urgent need to propose a solution to solve the above technical problems. Summary of the Invention

[0006] In order to make the coating formed by the application of the skin-friendly art coating not easily generate tiny cracks in a drastic temperature change environment and be able to exhibit excellent skin-friendly stability, the present application provides a skin-friendly art coating and its preparation process.

[0007] In the first aspect, the present application provides a skin-friendly art coating, adopting the following technical solution: A skin-friendly art coating is made from raw materials comprising the following parts by weight: Water 5 - 10 parts; Skin-friendly resin 20 - 40 parts; Emulsion: 10 - 30 parts; Feeling powder: 3 - 10 parts; Formaldehyde - removing auxiliary agent: 0.5 - 2 parts; Negative ion powder: 1 - 5 parts; Natural pearl shell color chips: 10 - 20 parts; Other auxiliary agents: 1 - 2 parts; Modified composite fiber: 0.8 - 1.2 parts; The modified composite fiber is prepared through the following steps: S1. Put vinyl pyrrolidone, solvent, initiator and multi - walled carbon nanotubes into a reaction vessel. After heating under reflux and reacting, filter by suction to obtain a solid product. After washing and drying the solid product, pretreated multi - walled carbon nanotubes are obtained; S2. Take polyamide chip raw materials, dry them and then prepare its formic acid solution to obtain a polyamide solution. Then add the pretreated multi - walled carbon nanotubes obtained in step S1 into the polyamide solution and stir - mix. During the stirring process, add titanium dioxide. After mixing evenly, perform electrospinning to obtain the modified composite fiber.

[0008] By adopting the above - mentioned technical solution, in the preparation of the modified composite fiber, first, vinyl pyrrolidone reacts with multi - walled carbon nanotubes under the action of an initiator to form a polymer coating layer, so that the obtained pretreated multi - walled carbon nanotubes show excellent dispersibility and interfacial compatibility in the subsequent polyamide solution and can be tightly combined with titanium dioxide; then, the pretreated multi - walled carbon nanotubes, titanium dioxide and polyamide solution are mixed, and through electrospinning technology, multi - component uniform composite and micro - nano structure regulation are realized, and finally the modified composite fiber is obtained. When the above - mentioned modified composite fiber is applied to the raw materials for preparing the skin - feeling art coating, not only can a three - dimensional intertwined network structure be formed in the coating to effectively inhibit the volume shrinkage / expansion of the coating matrix during thermal cycling, reduce the generation of tiny cracks in the coating, but also the Ti - O - C chemical bond formed between the pretreated multi - walled carbon nanotubes and titanium dioxide, and the hydrogen - bond interaction formed between the strong polar amide groups of polyvinyl pyrrolidone on the surface of the pretreated multi - walled carbon nanotubes and the polyamide molecular chains can enable multi - walled carbon nanotubes, titanium dioxide and polyamide to exert excellent synergistic effects during thermal cycling, thereby effectively absorbing and dispersing the stress generated by thermal cycling and buffering the stress concentration in the coating caused by sudden temperature changes, bringing an excellent thermal - cold regulation mechanism in the coating and reducing the cracking risk; thus, through the triple mechanisms of "inorganic filler functional modification + three - dimensional reinforcement network + interface optimization", the modified composite fiber can significantly improve the high - low temperature alternating resistance performance of the skin - feeling art coating, and thus can show excellent skin - feeling stability in a severely temperature - changing environment.

[0009] Preferably, in the preparation of the modified composite fiber, the weight ratio of the pretreated multi-walled carbon nanotubes, titanium dioxide and polyamide is (1.6 - 2.4):1:(8 - 12).

[0010] By adopting the above technical solution, when the raw materials with the above weight ratio are combined, the pretreated multi-walled carbon nanotubes can form an "interlocking structure" with titanium dioxide inside the modified composite fiber. The pretreated multi-walled carbon nanotubes serve as a skeleton to provide load-bearing capacity, and titanium dioxide fills the voids to improve density. At the same time, titanium dioxide can also be fully dispersed between the interface of the pretreated multi-walled carbon nanotubes and polyamide to form a continuous cold and heat regulation network. In this way, after the modified composite fiber is applied, a skin-friendly art coating with better skin feel stability in a severe temperature change environment can be obtained.

[0011] Preferably, the diameter of the modified composite fiber is 100 - 200 nm, and the length is 1 - 3 mm.

[0012] By adopting the above technical solution, when the modified composite fiber with the above specifications is applied, the network structure formed in the coating structure of the skin-friendly art coating is relatively uniform and dense, and thus can play a better corresponding effect, making the coating formed by the application of the skin-friendly art coating not prone to generate micro-cracks in a severe temperature change environment, and showing better skin feel stability.

[0013] Preferably, in the preparation of the modified composite fiber, the molecular weight of polyamide is 18000 - 22000; the diameter of multi-walled carbon nanotubes is 10 - 30 nm, and the length is 1 - 2 μm; the particle size of titanium dioxide is 20 - 25 nm.

[0014] By adopting the above technical solution, with a polyamide molecular weight of 18000 - 22000, a high-density molecular chain entanglement network can be formed, making the modified composite fiber exhibit better structural toughness. The multi-walled carbon nanotubes and titanium dioxide with the above specifications can be easily dispersed and mixed, and then form an excellent cooperation effect. In this way, the modified composite fiber obtained by combining the pretreated multi-walled carbon nanotubes, titanium dioxide and polyamide can play a better corresponding effect.

[0015] Preferably, a functional additive with a weight of 0.5 - 1 part is added to the raw materials. The functional additive is composed of montmorillonite and hollow glass microspheres, and the weight ratio of montmorillonite to hollow glass microspheres is (0.5 - 0.8):1.

[0016] By adopting the above technical solutions, the silicon-oxygen tetrahedron structure of montmorillonite can form a layered network in the skin-friendly artistic coating, which can absorb the expansion / contraction stress generated by the coating during the cold and hot cycles, lock organic molecules between layers, delay the oxidation and decomposition of the resin, and thus achieve double inhibition of the generation of microcracks in a severe temperature change environment; hollow glass microspheres can compress / expand when the temperature changes, buffer the thermal expansion and contraction stress of the coating, and offset local stress through the ball effect, thereby improving the temperature change cracking resistance of the coating; when montmorillonite and hollow glass microspheres are used as functional additives, the hollow glass microspheres can be partially loaded into the interlayer structure of montmorillonite, and then exert an excellent compound synergistic effect. By forming a two-stage buffer network, it can significantly improve the skin-friendly stability of the skin-friendly artistic coating in a severe temperature change environment. At the same time, the functional additive can also exert an excellent synergistic effect with the modified composite fiber. By combining the network structure formed by the modified composite fiber with the layered two-stage buffer network formed by the functional additive, the ability of the coating formed by the application of the skin-friendly artistic coating to resist the generation of microcracks in a severe temperature change environment can be significantly improved, and thus the skin-friendly stability during the application process of the skin-friendly artistic coating can be significantly improved.

[0017] Preferably, the weight ratio of the montmorillonite to the hollow glass microspheres is 0.7:1.

[0018] By adopting the above technical solutions, when the montmorillonite and the hollow glass microspheres in the above weight ratio are used in combination, the corresponding effects brought by their mutual combination in the coating structure of the skin-friendly artistic coating are better, and thus after the functional additive is applied, the improvement effect on the skin-friendly stability of the skin-friendly artistic coating in a severe temperature change environment is better.

[0019] Preferably, the particle size of the montmorillonite is 60 - 80 μm, the specific surface area is 200 - 260 m 2 / g, and the density is 2 - 2.5 g / cm 3 ; the particle size of the hollow glass microspheres is 20 - 30 μm, the specific surface area is 1.8 - 2.0 m 2 / g, and the density is 0.1 - 0.6 g / cm 3 .

[0020] By adopting the above technical solutions, when the montmorillonite and the hollow glass microspheres of the above specifications are used in combination, an excellent complementary buffer system can be formed in the coating structure, and the internal thermal gradient distribution of the coating can be optimized to form a relatively uniform and continuous two-stage buffer network, which can exert excellent corresponding effect in a severe temperature change environment, and thus the skin-friendly stability of the skin-friendly artistic coating in a severe temperature change environment is better.

[0021] Preferably, the other additives are one or a combination of several of a dispersant, an antifoaming agent, a leveling agent, a wetting agent, a film-forming aid, a preservative, a thickener, and an adhesion promoter.

[0022] By adopting the above technical solution, the additives synergistically act in three aspects: regulating processing stability, optimizing film-forming quality, and enhancing durability. All the above types of additives are suitable for the preparation of the skin-friendly art coating, and can be selected and combined according to the needs of the actual application scenario, and can all play better corresponding effects in the application, ensuring that the finally obtained skin-friendly art coating has better application quality.

[0023] In the second aspect, the present application provides a preparation process for a skin-friendly art coating, adopting the following technical solution: A preparation process for a skin-friendly art coating includes the following steps: (1) Prepare raw materials including water, skin-friendly resin, emulsion, hand-feel powder, formaldehyde-removing additive, negative ion powder, natural pearl shell color chips, other additives, and modified composite fibers according to the ratio; (2) After stirring and mixing the water and other additives in step (1), add the hand-feel powder during the stirring process, then reduce the stirring speed and add the skin-friendly resin and emulsion for mixing and dispersion, then add the natural pearl shell color chips and modified composite fibers for mixing, and finally add the formaldehyde-removing additive and negative ion powder for mixing to obtain the skin-friendly art coating.

[0024] By adopting the above technical solution, the above preparation process is simple to operate and suitable for large-scale industrial production; and each raw material is added and used in steps, which is easy to control the quality during the production process, and can ensure that each raw material is fully combined and coordinated and plays an excellent role effect, ensuring the obtained skin-friendly art coating with excellent and stable quality.

[0025] In summary, the present application has the following beneficial effects: 1. By adding and using specially prepared modified composite fibers in the skin-friendly art coating in the present application, the multi-walled carbon nanotubes, titanium dioxide, and polyamide play an excellent synergistic effect under the thermal cycling, thereby effectively absorbing and dispersing the stress generated by the thermal cycling, and buffering the stress concentration in the coating caused by the sudden temperature change, bringing an excellent thermal regulation mechanism of the modified composite fibers in the coating, so that the coating formed by the application of the skin-friendly art coating is not prone to generating micro-cracks in the severe temperature change environment and can exhibit excellent skin-friendly stability; 2. By adding and using a functional additive composed of montmorillonite and hollow glass microspheres in the skin-friendly art coating in the present application, the montmorillonite and hollow glass microspheres are compounded to form a two-stage buffer network and achieve synergistic effects with the modified composite fibers, which can significantly improve the skin-friendly stability of the skin-friendly art coating in the severe temperature change environment. Specific embodiments

[0026] The present application will be further described in detail below in conjunction with Preparation Examples, Examples and Comparative Examples.

[0027] Unless otherwise specified, the raw materials used in the preparation examples, examples and comparative examples of the present application are all commercially available.

[0028] The skin-friendly resin is purchased from the waterborne touch coating resin WPU 2320 of Guangzhou Huigu New Materials Technology Co., Ltd.; The emulsion is a waterborne acrylic emulsion, purchased from BASF HPD 196 MEA AP waterborne acrylic resin emulsion; The hand feel powder is purchased from the elastic hand feel powder TY-3155 of Jining Tangyi Chemical Co., Ltd.; The formaldehyde removal assistant is purchased from the formaldehyde absorption assistant SX9702 of Zhengzhou Huilin Chemical Co., Ltd.; The negative ion powder is purchased from the 1250-mesh white negative ion powder of LingShou County Bangtuo Mineral Products Processing Factory; The natural pearl shell color chips are purchased from LingShou County Yuanda Mica Factory, with a specification of 30 mesh; The other assistants are composed of a defoamer, a leveling agent, a film-forming assistant and a dispersant in a weight ratio of 0.3:1.5:2.5:1.8. Among them, the defoamer is purchased from BYK-021 defoamer of BYK Germany, the leveling agent is purchased from BYK-349 leveling agent of BYK Germany, the film-forming assistant is purchased from Eastman film-forming assistant TEXANOL alcohol ester twelve, and the dispersant is purchased from BYK-190 dispersant of BYK Germany.

[0029] Preparation Examples of Raw Materials and / or Intermediates Preparation Example 1 A modified composite fiber is obtained by the following steps: S1. Put vinylpyrrolidone, a solvent, an initiator and multi-walled carbon nanotubes into a reaction vessel, heat to 75 °C and reflux for 24 h, then obtain a solid product by suction filtration. After washing the solid product with ethanol and drying, pretreated multi-walled carbon nanotubes are obtained; S2. Take polyamide chip raw materials, dry them and prepare their formic acid solution to obtain a 15% polyamide solution by mass. Then add the pretreated multi-walled carbon nanotubes obtained in step S1 to the polyamide solution and stir and mix. During the stirring process, add titanium dioxide, and after mixing evenly, perform electrospinning to obtain the modified composite fiber.

[0030] Note: In the above operation, the weight ratio of vinyl pyrrolidone, solvent, initiator and multi-walled carbon nanotubes is 6 g: 40 mL: 0.05 g: 1 g, where the solvent is ethanol and the initiator is azobisisobutyronitrile. The weight ratio of pretreated multi-walled carbon nanotubes, titanium dioxide and polyamide is 2:1:10. The diameter of the modified composite fiber is 150 nm and the length is 2 mm. The molecular weight of polyamide is 20,000; the diameter of multi-walled carbon nanotubes is 20 nm and the length is 1.5 μm; the particle size of titanium dioxide is 22.5 nm.

[0031] Preparation Example 2 A modified composite fiber, which is different from Preparation Example 1 in that the weight ratio of pretreated multi-walled carbon nanotubes, titanium dioxide and polyamide is 1.6:1:8.

[0032] Preparation Example 3 A modified composite fiber, which is different from Preparation Example 1 in that the weight ratio of pretreated multi-walled carbon nanotubes, titanium dioxide and polyamide is 2.4:1:12.

[0033] Preparation Example 4 A modified composite fiber, which is different from Preparation Example 1 in that the diameter of the modified composite fiber is 100 nm and the length is 1 mm.

[0034] Preparation Example 5 A modified composite fiber, which is different from Preparation Example 1 in that the diameter of the modified composite fiber is 200 nm and the length is 3 mm.

[0035] Preparation Example 6 A modified composite fiber, which is different from Preparation Example 1 in that the molecular weight of polyamide is 18,000; the diameter of multi-walled carbon nanotubes is 10 nm and the length is 1 μm; the particle size of titanium dioxide is 20 nm.

[0036] Preparation Example 7 A modified composite fiber, which is different from Preparation Example 1 in that the molecular weight of polyamide is 22,000; the diameter of multi-walled carbon nanotubes is 30 nm and the length is 2 μm; the particle size of titanium dioxide is 25 nm.

[0037] Examples Example 1 A skin-friendly art coating, the raw materials used in its preparation and their corresponding weight parts are shown in Table 1, and it is obtained by the following steps: (1) Prepare raw materials including water, skin-friendly resin, emulsion, hand feeling powder, aldehyde removal aid, negative ion powder, natural pearl shell color chips, other aids and modified composite fibers according to the ratio; (2) After stirring and mixing the water and other additives in step (1), add the feel powder during the stirring process, then reduce the stirring speed and add the skin feel resin and emulsion for mixing and dispersion. Then add the natural pearl shell color chips and the modified composite fibers for mixing, and finally add the formaldehyde removal additive and the negative ion powder for mixing to obtain the skin feel art coating.

[0038] Note: In the above operations, the modified composite fibers are obtained from Preparation Example 1.

[0039] Examples 2 - 3 A skin feel art coating, which is different from Example 1 in that the raw materials used in its preparation and their corresponding weight parts are shown in Table 1.

[0040] Table 1 Raw materials used in the preparation of Examples 1 - 3 and their corresponding weight parts (parts / kg) Example 4 A skin feel art coating, which is different from Example 1 in that the modified composite fibers are obtained from Preparation Example 2.

[0041] Example 5 A skin feel art coating, which is different from Example 1 in that the modified composite fibers are obtained from Preparation Example 3.

[0042] Example 6 A skin feel art coating, which is different from Example 1 in that the modified composite fibers are obtained from Preparation Example 4.

[0043] Example 7 A skin feel art coating, which is different from Example 1 in that the modified composite fibers are obtained from Preparation Example 5.

[0044] Example 8 A skin feel art coating, which is different from Example 1 in that the modified composite fibers are obtained from Preparation Example 6.

[0045] Example 9 A skin feel art coating, which is different from Example 1 in that the modified composite fibers are obtained from Preparation Example 7.

[0046] Example 10 A skin feel art coating, which is different from Example 1 in that a functional additive with a weight part of 0.75 parts is further added to the raw materials. The functional additive is composed of montmorillonite and hollow glass microspheres in a weight part ratio of 0.7:1, and the functional additive is added and used together with the natural pearl shell color chips. At the same time, the particle size of the montmorillonite is 70 μm, the specific surface area is 230 m 2 / g, and the density is 2.25 g / cm 3; The particle size of the hollow glass microspheres is 25 μm, and the specific surface area is 1.8 m 2 / g, and the density is 0.35 g / cm 3 .

[0047] Example 11 A skin-friendly artistic coating, which is different from Example 10 in that the weight part of the functional additive added is 0.5 part.

[0048] Example 12 A skin-friendly artistic coating, which is different from Example 10 in that the weight part of the functional additive added is 1 part.

[0049] Example 13 A skin-friendly artistic coating, which is different from Example 10 in that the functional additive is composed of montmorillonite and hollow glass microspheres in a weight ratio of 0.65:1.

[0050] Example 14 A skin-friendly artistic coating, which is different from Example 10 in that the functional additive is composed of montmorillonite and hollow glass microspheres in a weight ratio of 0.5:1.

[0051] Example 15 A skin-friendly artistic coating, which is different from Example 10 in that the functional additive is composed of montmorillonite and hollow glass microspheres in a weight ratio of 0.8:1.

[0052] Example 16 A skin-friendly artistic coating, which is different from Example 10 in that the particle size of the montmorillonite is 60 μm and the specific surface area is 200 m 2 / g, and the density is 2 g / cm 3 ; The particle size of the hollow glass microspheres is 20 μm, and the specific surface area is 1.8 m 2 / g, and the density is 0.1 g / cm 3 .

[0053] Example 17 A skin-friendly artistic coating, which is different from Example 10 in that the particle size of the montmorillonite is 80 μm and the specific surface area is 260 m 2 / g, and the density is 2.5 g / cm 3 ; The particle size of the hollow glass microspheres is 30 μm, and the specific surface area is 2.0 m 2 / g, and the density is 0.6 g / cm 3 .

[0054] Example 18 A skin-friendly artistic coating, which is different from Example 10 in that montmorillonite is not used in the raw materials.

[0055] Example 19 A skin-friendly art coating, which is different from that of Example 10 in that hollow glass microspheres are not used in the raw materials.

[0056] Comparative example Comparative example 1 A skin-friendly art coating, which is different from that of Example 1 in that modified composite fibers are not used in the raw materials.

[0057] Comparative example 2 A skin-friendly art coating, which is different from that of Example 1 in that the modified composite fibers are replaced with a mixture of pretreated multi-walled carbon nanotubes, titanium dioxide and polyamide fibers in an equal mass ratio, and the specifications of the polyamide fibers are the same as those of the modified composite fibers.

[0058] Comparative example 3 A skin-friendly art coating, which is different from that of Comparative example 2 in that pretreated multi-walled carbon nanotubes and titanium dioxide are not used in the raw materials.

[0059] Comparative example 4 A skin-friendly art coating, which is different from that of Comparative example 2 in that pretreated multi-walled carbon nanotubes and polyamide fibers are not used in the raw materials.

[0060] Comparative example 5 A skin-friendly art coating, which is different from that of Comparative example 2 in that titanium dioxide and polyamide fibers are not used in the raw materials.

[0061] Comparative example 6 A skin-friendly art coating, which is different from that of Example 10 in that modified composite fibers are not used in the raw materials.

[0062] Performance detection test Test samples: The skin-friendly art coatings obtained in Examples 1-19 were selected as test samples 1-19, and the skin-friendly art coatings obtained in Comparative examples 1-6 were selected as control samples 1-6.

[0063] Test method: A standard metal plate (Q235 steel plate) with a thickness of 0.6 mm was selected as the test plate; the skin-friendly art coating was applied to the surface of the test plate, and the wet film thickness was controlled to be 80 μm, and then it was cured for 10 days in a standard environment (temperature 23±2°C, humidity 50±5%RH) to obtain a standard test sample; Randomly select 10 people to conduct a skin-friendly evaluation on the standard test sample. The skin-friendly evaluation is mainly carried out through smoothness test and softness test. Among them, the smoothness test is to gently stroke the surface of the coating film with the back of the hand at a constant speed to feel the frictional resistance; the softness test is to press the coating film to feel the slight resilience and soft wrapping feeling similar to the skin. The specific scoring criteria are as follows: 0 - 3 points (excluding 3 points): Very rough, with poor fineness, softness, and general smoothness. 3 - 6 points (excluding 6 points): Relatively rough, with moderate fineness and softness, and moderate smoothness. 6 - 8 points (excluding 8 points): Relatively smooth, with good fineness and softness, and good smoothness. 8 - 10 points: Very smooth, with very good fineness and softness, and very good smoothness.

[0064] Take the average score of 10 people's ratings as the initial skin feel score value of the standard test sample, denoted as A.

[0065] Next, place the standard test sample in a high and low temperature alternating test chamber with an initial temperature of 25°C. First, heat it to 50°C at a rate of 2°C / min and keep it warm for 20 minutes. Then, cool it to -10°C at a rate of 1°C / min and maintain it for 10 minutes. After that, heat it back to 25°C at a rate of 1.5°C / min, which is recorded as 1 cycle. After continuously performing 20 cycles, conduct the above test in the same way. Take the average score of 10 people's ratings as the skin feel score value of the standard test sample under temperature change, denoted as B. Finally, calculate the skin feel loss rate of the standard test sample in the temperature change environment. Skin feel loss rate = (A - B) / A. The lower the skin feel loss rate, the better the skin feel stability of the skin feel art coating in the severe temperature change environment.

[0066] After conducting the above tests on test samples 1 - 19 and control samples 1 - 6, record the test results in Table 2 correspondingly.

[0067] Table 2 Test Results of Test Samples 1 - 19 and Control Samples 1 - 6 Combining Example 1 and Comparative Example 1 and referring to Table 2, it can be seen that adding and using specially prepared modified composite fibers in the skin feel art coating can significantly improve the skin feel stability of the skin feel art coating in the severe temperature change environment, and the skin feel loss rate obtained from the above tests is also significantly reduced. Combining Comparative Examples 2 - 5 and referring to Table 2, it can be seen that the modified composite fibers contain multi-walled carbon nanotubes, titanium dioxide, and polyamide. If the modified composite fibers are replaced with a mixture of pretreated multi-walled carbon nanotubes, titanium dioxide, and polyamide fibers, it is found that although the skin feel stability of the skin feel art coating in the severe temperature change environment can be improved, the improvement effect will be greatly reduced, and compared with the case of separately adding and using pretreated multi-walled carbon nanotubes, titanium dioxide, or polyamide fibers, it is only a simple superposition of the corresponding effects. Thus, it can be seen that only when using modified composite fibers can multi-walled carbon nanotubes, titanium dioxide, and polyamide exert excellent synergistic effects, thereby significantly improving the skin feel stability of the skin feel art coating in the severe temperature change environment.

[0068] Combining Example 1 and Examples 10 - 17 and referring to Table 2, it can be seen that adding a functional additive composed of montmorillonite and hollow glass microspheres to the skin - feeling art coating can further reduce the skin - feeling loss rate obtained from the above tests, indicating that the skin - feeling stability of the skin - feeling art coating in a severe temperature - change environment has been further improved. Combining Examples 18 - 19 and referring to Table 2, it can be seen that if only montmorillonite or hollow glass microspheres are added, although it can bring about an improvement in the corresponding effects, the improvement amplitude is limited, and the sum of the improvement effects brought by adding them separately is far less excellent than the compounding of the two. Thus, it can be seen that montmorillonite and hollow glass microspheres can play an excellent compounding and synergistic effect in the skin - feeling art coating. Combining Comparative Examples 1 and 6 and referring to Table 2, it can be seen that if the preparation raw materials of the skin - feeling art coating lack the use of modified composite fibers, it is found that the corresponding effects brought by the functional additive will be greatly discounted, indicating that the use of the functional additive can play a synergistic effect with the modified composite fibers, and thus can significantly improve the skin - feeling stability of the skin - feeling art coating in a severe temperature - change environment.

[0069] This specific embodiment is only an interpretation of the present application, and it is not a limitation of the present application. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. An art coating with a skin-friendly feel, characterized in that, It is made from raw materials including the following parts by weight: Water 5 - 10 parts; Skin - feel resin 20 - 40 parts; Emulsion 10 - 30 parts; Hand - feel powder 3 - 10 parts; Formaldehyde - removing auxiliary 0.5 - 2 parts; Negative - ion powder 1 - 5 parts; Natural pearl shell color flakes 10 - 20 parts; Other auxiliaries 1 - 2 parts; Modified composite fiber 0.8 - 1.2 parts; The modified composite fiber is prepared through the following steps: S1. Put vinylpyrrolidone, solvent, initiator and multi - walled carbon nanotubes into a reaction vessel. After heating and refluxing, filter to obtain a solid product. After washing and drying the solid product, pretreated multi - walled carbon nanotubes are obtained; S2. Take polyamide chip raw materials, dry them and prepare their formic acid solution to obtain a polyamide solution. Then add the pretreated multi - walled carbon nanotubes obtained in step S1 into the polyamide solution and stir - mix. Add titanium dioxide during the stirring process. After mixing evenly, electrospinning is carried out to obtain the modified composite fiber.

2. The skin-friendly artistic coating according to claim 1, wherein: In the preparation of the modified composite fiber, the weight ratio of the pretreated multi - walled carbon nanotubes, titanium dioxide and polyamide is (1.6 - 2.4):1:(8 - 12).

3. The skin-friendly artistic coating according to claim 1, characterized in that: The diameter of the modified composite fiber is 100 - 200 nm and the length is 1 - 3 mm.

4. The skin-friendly artistic coating according to claim 1, wherein: In the preparation of the modified composite fiber, the molecular weight of polyamide is 18000 - 22000; the diameter of multi - walled carbon nanotubes is 10 - 30 nm and the length is 1 - 2 μm; the particle size of titanium dioxide is 20 - 25 nm.

5. The skin-feel art coating according to claim 1, characterized in that: A functional auxiliary with a weight of 0.5 - 1 part is also added to the raw materials. The functional auxiliary is composed of montmorillonite and hollow glass microspheres, and the weight ratio of montmorillonite to hollow glass microspheres is (0.5 - 0.8):

1.

6. The tactile art coating according to claim 5, wherein: The weight ratio of the montmorillonite to the hollow glass microspheres is 0.7:

1.

7. The skin-feel art paint according to claim 5, characterized in that: The particle size of the montmorillonite is 60 - 80 μm, the specific surface area is 200 - 260 m 2 / g, and the density is 2 - 2.5 g / cm 3 ; the particle size of the hollow glass microspheres is 20 - 30 μm, the specific surface area is 1.8 - 2.0 m 2 / g, and the density is 0.1 - 0.6 g / cm 3 .

8. The skin-feel artistic coating according to claim 1, characterized in that: The other auxiliaries are a composition of one or several of a dispersant, defoamer, leveling agent, wetting agent, film - forming auxiliary, preservative, thickener and adhesion promoter.

9. The preparation process of a skin-feel art paint as described in claim 1, characterized in that: It includes the following steps: (1) Prepare raw materials including water, skin - feel resin, emulsion, hand - feel powder, formaldehyde - removing auxiliary, negative - ion powder, natural pearl shell color flakes, other auxiliaries and modified composite fiber according to the ratio; (2) Stir - mix the water and other auxiliaries in step (1), add the hand - feel powder during the stirring process, then reduce the stirring speed and add the skin - feel resin and emulsion to mix and disperse. Then add the natural pearl shell color flakes and modified composite fiber to mix. Finally, add the formaldehyde - removing auxiliary and negative - ion powder to mix to obtain the skin - feel art coating.

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