Skin-feeling artistic paint and preparation process thereof

Abstract

The present application relates to the field of coating technology, and specifically discloses a skin-feeling art coating and a preparation process thereof. A skin-feeling art coating is made of the following raw materials in parts by weight: 5-10 parts of water, 20-40 parts of skin-feeling resin, 10-30 parts of emulsion, 3-10 parts of hand-feeling powder, 0.5-2 parts of formaldehyde-removing auxiliary agent, 1-5 parts of negative ion powder, 10-20 parts of natural pearl shell color flakes, 1-2 parts of other auxiliary agents, and 0.8-1.2 parts of modified composite fiber; its preparation process is: after water and other auxiliary agents are stirred and mixed, hand-feeling powder is added during the stirring process, and then the stirring speed is reduced and the skin-feeling resin and emulsion are added and mixed and dispersed, and then natural pearl shell color flakes and modified composite fibers are added and mixed, and finally formaldehyde-removing auxiliary agent and negative ion powder are added and mixed to obtain. The coating formed by the application of the skin-feeling art coating of the present application is not easy to produce tiny cracks under a severe temperature change environment, and can show excellent skin-feel stability.

Description

Technical Field

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

[0002] Artistic paint is a new type of wall decoration material that combines the advantages of traditional paint and artistic elements, providing a more diverse range of wall decoration options. Skin-feel artistic paint has an extremely smooth feel, resembling the delicate and authentic feel of real leather, providing a natural and comfortable experience. This unique tactile experience has made it highly sought after in the market.

[0003] The raw materials for preparing skin-feel art paint mainly include resin, filler, pigment, water, and additives such as dispersants, leveling agents, and preservatives. Among them, resin forms the main body of the coating, allowing the coating to firmly adhere to the surface of the coated object to form a continuous film; filler can build skin-feel layers and enhance physical properties; pigments can bring visual and protective effects; water acts as a solvent to replace organic volatiles, reducing environmental pollution, and at the same time adjusting the viscosity of the paint for construction; additives such as dispersants, leveling agents, and preservatives can play an important role in the process of coating film formation and durability; and the above raw materials work synergistically to give skin-feel art paint a unique color, texture, and texture, and have excellent skin-feel performance in actual application, bringing high decorative effects and personalized style.

[0004] Regarding the above-mentioned related technologies, the inventors believe that skin-feel artistic coatings will inevitably be affected by drastic temperature changes during their application, especially in plateau areas where the temperature difference between day and night is large and this impact is more common; and in a drastic temperature change environment, the repeated expansion and contraction of the substrate and coating will lead to stress accumulation, which can easily cause the coating to crack. This 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 feel of the coating when touched.

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

[0006] In order to prevent the coating formed by the application of skin-feel art paint from producing tiny cracks in a drastic temperature change environment and to exhibit excellent skin-feel stability, the present application provides a skin-feel art paint and a preparation process thereof.

[0007] In the first aspect, the present application provides a skin-feeling artistic paint, which adopts the following technical solution:

[0008] A skin-feeling artistic paint is prepared from the following raw materials in parts by weight:

[0009] 5-10 parts water;

[0010] 20-40 parts of skin-feel resin;

[0011] 10-30 parts of emulsion;

[0012] 3-10 parts hand powder;

[0013] 0.5-2 parts of formaldehyde removal agent;

[0014] 1-5 parts of negative ion powder;

[0015] 10-20 pieces of natural pearl shell colored flakes;

[0016] 1-2 parts of other additives;

[0017] 0.8-1.2 parts of modified composite fiber;

[0018] The modified composite fiber is prepared by the following steps:

[0019] S1. placing vinyl pyrrolidone, a solvent, an initiator, and multi-walled carbon nanotubes in a reaction vessel, heating under reflux for reaction, and filtering to obtain a solid product. The solid product is washed and dried to obtain pretreated multi-walled carbon nanotubes;

[0020] S2. Take a polyamide chip raw material, dry it, and prepare a formic acid solution thereof to obtain a polyamide solution. Then, add the pretreated multi-walled carbon nanotubes obtained in step S1 to the polyamide solution and stir and mix them. Add titanium dioxide during the stirring process, mix well, and then electrospin to obtain a modified composite fiber.

[0021] By adopting the above technical solution, in the preparation of modified composite fibers, vinyl pyrrolidone is first grafted 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 exhibit 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 electrospinning technology is used to achieve multi-component uniform compounding and micro-nano structure regulation, thereby finally obtaining modified composite fibers. The application of the above-mentioned modified composite fibers in the preparation of raw materials for skin-feel art coatings can not only effectively inhibit the volume shrinkage / expansion of the coating matrix during hot and cold cycles by forming a three-dimensional interwoven network structure in the coating, and reduce the occurrence of tiny cracks in the coating, but also utilize the Ti-OC chemical bonds formed between the pretreated multi-walled carbon nanotubes and titanium dioxide, and the strong polar amide groups of polyvinyl pyrrolidone on the surface of the pretreated multi-walled carbon nanotubes to form hydrogen bonds with the polyamide molecular chains, so that the multi-walled carbon nanotubes, titanium dioxide and polyamide can play an excellent synergistic role under hot and cold cycles, thereby effectively absorbing and dispersing the stress generated by hot and cold cycles, and buffering the stress concentration in the coating caused by sudden temperature changes, so that the modified composite fibers bring an excellent hot and cold regulation mechanism in the coating, reducing the risk of cracking; in this way, the modified composite fibers can significantly improve the high and low temperature alternation resistance of the skin-feel art coating through the triple mechanism of "functional modification of inorganic fillers + three-dimensional reinforced network + interface optimization", and thus can exhibit excellent skin-feel stability under drastic temperature changes.

[0022] Preferably, in the preparation of the modified composite fiber, the weight ratio of pretreated multi-walled carbon nanotubes, titanium dioxide and polyamide is (1.6-2.4):1:(8-12).

[0023] By adopting the above technical solution, when the raw materials are combined in the above weight ratio, 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 gaps to improve density. At the same time, titanium dioxide can also be fully dispersed between the pretreated multi-walled carbon nanotubes and the polyamide interface to form a continuous hot and cold control network. In this way, after the modified composite fiber is applied, a skin-feeling artistic coating with better skin-feel stability under drastic temperature changes can be obtained.

[0024] Preferably, the modified composite fiber has a diameter of 100-200 nm and a length of 1-3 mm.

[0025] By adopting the above technical solution, when the modified composite fiber of the above specifications is used, the network structure formed in the coating structure of the skin-feel art paint is relatively uniform and dense, and thus can exert a better corresponding effect, so that the coating formed by the application of the skin-feel art paint is not prone to tiny cracks in a drastic temperature change environment, and the skin-feel stability exhibited is better.

[0026] Preferably, in the preparation of the modified composite fiber, the molecular weight of the polyamide is 18,000-22,000; the diameter of the multi-walled carbon nanotube is 10-30 nm, and the length is 1-2 μm; and the particle size of the titanium dioxide is 20-25 nm.

[0027] By adopting the above technical solution, the polyamide molecular weight of 18,000-22,000 can form a high-density molecular chain entanglement network, so that the modified composite fiber exhibits better structural toughness; and the multi-walled carbon nanotubes and titanium dioxide of the above specifications can be easily dispersed and mixed, thereby forming an excellent matching effect; in this way, the modified composite fiber obtained by combining the pretreated multi-walled carbon nanotubes, titanium dioxide and polyamide can exert better corresponding effects.

[0028] Preferably, 0.5-1 parts by weight of a functional additive is further added to the raw materials, wherein 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.

[0029] By adopting the above technical solution, the silicon-oxygen tetrahedral structure of montmorillonite can form a layered network in the skin-feel art paint, which can absorb the expansion / contraction stress generated by the hot and cold cycles of the coating, and delay the oxidative decomposition of the resin by locking the organic molecules between the layers, thereby achieving double inhibition of the generation of tiny cracks in a drastic temperature change environment; the 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 coating's resistance to temperature change cracking; and when montmorillonite and hollow glass microspheres are used as functional additives, the hollow glass microspheres can be partially loaded in the interlayer structure of montmorillonite, thereby exerting an excellent compounding and synergistic effect. By forming a double-stage buffer network, the skin-feel stability of the skin-feel art paint in a drastic temperature change environment can be significantly improved. At the same time, the functional additives can also play an excellent synergistic role with the modified composite fibers. By combining the network structure formed by the modified composite fibers with the layered double-stage buffer network formed by the functional additives, the coating formed by the application of the skin-feel art paint can significantly improve its ability to resist the formation of micro cracks in a drastic temperature change environment, thereby significantly improving the skin feel stability of the skin-feel art paint during the application process.

[0030] Preferably, the weight ratio of the montmorillonite to the hollow glass microspheres is 0.7:1.

[0031] By adopting the above technical solution, when montmorillonite and hollow glass microspheres in the above weight ratio are used in combination, the corresponding effect brought about by the mutual combination of the two in the coating structure formed by the skin-feel art paint is better, and then after the functional additives are applied, the skin-feel stability of the skin-feel art paint in a drastic temperature change environment is better improved.

[0032] Preferably, the particle size of the montmorillonite is 60-80 μm and the specific surface area is 200-260 m 2 / g‌, density is 2-2.5g / cm 3 The hollow glass microspheres have a particle size of 20-30 μm and a specific surface area of ​​1.8-2.0 m 2 / g‌, density is 0.1-0.6 g / cm 3 .

[0033] By adopting the above technical solution, when the montmorillonite and 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 thermal gradient distribution inside the coating can be optimized to form a relatively uniform and continuous two-stage buffer network, which can exert excellent corresponding effects in a drastic temperature change environment, thereby making the skin-feel art paint have better skin-feel stability in a drastic temperature change environment.

[0034] Preferably, the other additives are one or a combination of several of the following: dispersant, defoamer, leveling agent, wetting agent, film-forming aid, preservative, thickener and adhesion promoter.

[0035] By adopting the above technical solution, the additives work synergistically in three aspects: processing stability regulation, film quality optimization, and durability enhancement. The above types of additives are all suitable for the preparation of skin-feel artistic coatings, and can be selected and combined according to the needs of actual application scenarios. They can all exert better corresponding effects in application, ensuring that the final skin-feel artistic coating has better application quality.

[0036] In a second aspect, the present application provides a preparation process for a skin-feeling artistic coating, which adopts the following technical solution:

[0037] A preparation process of a skin-feeling artistic paint comprises the following steps:

[0038] (1) Prepare raw materials including water, skin-feeling resin, emulsion, hand-feeling powder, formaldehyde removal additive, negative ion powder, natural pearl shell color flakes, other additives and modified composite fiber according to the proportion;

[0039] (2) After the water and other additives in step (1) are stirred and mixed, hand-feel powder is added during the stirring process, and then the stirring speed is reduced and the skin-feel resin and emulsion are added and mixed and dispersed, followed by adding natural pearl shell color flakes and modified composite fibers and finally adding formaldehyde removal additives and negative ion powder to mix, thereby obtaining skin-feel art paint.

[0040] By adopting the above technical solution, the above preparation process is simple to operate and suitable for large-scale industrial production; and the raw materials are added and used in steps, which is easy to control the quality during the production process, and can ensure that the raw materials are fully combined and coordinated to exert excellent effects, thereby ensuring that high-quality and stable skin-feeling artistic coatings are obtained.

[0041] In summary, this application has the following beneficial effects:

[0042] 1. This application adds specially prepared modified composite fibers to skin-feel art paint, utilizing multi-walled carbon nanotubes, titanium dioxide, and polyamide to exert excellent synergistic effects under hot and cold cycles, thereby effectively absorbing and dispersing the stress generated by hot and cold cycles and buffering the stress concentration within the coating caused by sudden temperature changes. The modified composite fibers provide an excellent hot and cold regulation mechanism in the coating, thereby making the coating formed by the application of the skin-feel art paint less likely to produce microcracks under drastic temperature changes and exhibiting excellent skin-feel stability.

[0043] 2. This application adds functional additives composed of montmorillonite and hollow glass microspheres to the skin-feel art paint, forms a double-stage buffer network by compounding montmorillonite and hollow glass microspheres, and achieves synergistic enhancement with modified composite fibers, which can significantly improve the skin-feel stability of the skin-feel art paint in a drastic temperature change environment. DETAILED DESCRIPTION

[0044] The present application is further described in detail below with reference to preparation examples, embodiments and comparative examples.

[0045] Unless otherwise specified, the raw materials used in the preparation examples, embodiments and comparative examples of the present application are all commercially available.

[0046] Skin-feel resin was purchased from the water-based touch coating resin WPU 2320 of Guangzhou Huigu New Materials Technology Co., Ltd.

[0047] The emulsion is a water-based acrylic emulsion purchased from BASF HPD 196 MEA AP water-based acrylic resin emulsion;

[0048] The hand feel powder was purchased from Jining Tangyi Chemical Co., Ltd. as elastic hand feel powder TY-3155;

[0049] The formaldehyde removal agent was purchased from Zhengzhou Huilin Chemical Co., Ltd. as formaldehyde absorption agent SX9702;

[0050] Negative ion powder was purchased from Lingshou County Bangtuo Mineral Products Processing Plant as 1250 mesh white negative ion powder;

[0051] Natural pearl shell colored flakes were purchased from Yuanda Mica Factory in Lingshou County, with a specification of 30 mesh;

[0052] Other additives are composed of defoaming agent, leveling agent, film-forming agent and dispersant in a weight ratio of 0.3:1.5:2.5:1.8, wherein the defoaming agent is purchased from BYK-021 defoaming agent of Germany, the leveling agent is purchased from BYK-349 leveling agent of Germany, the film-forming agent is purchased from Eastman film-forming agent TEXANOL alcohol ester twelve, and the dispersant is purchased from BYK-190 dispersant of Germany.

[0053] Preparation examples of raw materials and / or intermediates

[0054] Preparation Example 1

[0055] A modified composite fiber is prepared by the following steps:

[0056] S1. placing vinyl pyrrolidone, a solvent, an initiator, and multi-walled carbon nanotubes in a reaction vessel, heating to 75° C. and reflux for 24 hours, filtering to obtain a solid product, washing the solid product with ethanol, and drying to obtain pretreated multi-walled carbon nanotubes;

[0057] S2. Take a polyamide chip raw material, dry it, and prepare a formic acid solution thereof to obtain a polyamide solution with a mass fraction of 15%. Then, add the pretreated multi-walled carbon nanotubes obtained in step S1 to the polyamide solution and stir and mix them. Add titanium dioxide during the stirring process, mix well, and then electrospin to obtain a modified composite fiber.

[0058] Note: In the above operation, the weight ratio of vinyl pyrrolidone, solvent, initiator, and multi-walled carbon nanotubes was 6 g:40 mL:0.05 g:1 g, with ethanol as the solvent and azobisisobutyronitrile as the initiator. The weight ratio of pretreated multi-walled carbon nanotubes, titanium dioxide, and polyamide was 2:1:10. The modified composite fiber had a diameter of 150 nm and a length of 2 mm. The molecular weight of the polyamide was 20,000; the diameter of the multi-walled carbon nanotubes was 20 nm and the length was 1.5 μm; and the particle size of the titanium dioxide was 22.5 nm.

[0059] Preparation Example 2

[0060] A modified composite fiber 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.

[0061] Preparation Example 3

[0062] A modified composite fiber 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.

[0063] Preparation Example 4

[0064] A modified composite fiber is different from the one prepared in Preparation Example 1 in that the modified composite fiber has a diameter of 100 nm and a length of 1 mm.

[0065] Preparation Example 5

[0066] A modified composite fiber is different from the one prepared in Preparation Example 1 in that the modified composite fiber has a diameter of 200 nm and a length of 3 mm.

[0067] Preparation Example 6

[0068] A modified composite fiber is different from Preparation Example 1 in that the molecular weight of the polyamide is 18,000; the diameter of the multi-walled carbon nanotube is 10 nm and the length is 1 μm; and the particle size of the titanium dioxide is 20 nm.

[0069] Preparation Example 7

[0070] A modified composite fiber is different from Preparation Example 1 in that the molecular weight of the polyamide is 22,000; the diameter of the multi-walled carbon nanotube is 30 nm and the length is 2 μm; and the particle size of the titanium dioxide is 25 nm.

[0071] Example

[0072] Example 1

[0073] A skin-feeling artistic paint, the raw materials used in its preparation and their corresponding weight parts are shown in Table 1, and it is prepared by the following steps:

[0074] (1) Prepare raw materials including water, skin-feeling resin, emulsion, hand-feeling powder, formaldehyde removal additive, negative ion powder, natural pearl shell color flakes, other additives and modified composite fiber according to the proportion;

[0075] (2) After the water and other additives in step (1) are stirred and mixed, hand-feel powder is added during the stirring process, and then the stirring speed is reduced and the skin-feel resin and emulsion are added and mixed and dispersed, followed by adding natural pearl shell color flakes and modified composite fibers and finally adding formaldehyde removal additives and negative ion powder to mix, thereby obtaining skin-feel art paint.

[0076] Note: In the above operation, the modified composite fiber was obtained from Preparation Example 1.

[0077] Example 2-3

[0078] A skin-feeling artistic paint is different from Example 1 in that the raw materials used in its preparation and their corresponding weight parts are shown in Table 1.

[0079] Table 1 Raw materials used in the preparation of Examples 1-3 and their corresponding weight parts (parts / kg)

[0080]

[0081] Example 4

[0082] A skin-feel artistic paint, which is different from Example 1 in that the modified composite fiber is obtained from Preparation Example 2.

[0083] Example 5

[0084] A skin-feel artistic paint, which is different from Example 1 in that the modified composite fiber is obtained from Preparation Example 3.

[0085] Example 6

[0086] A skin-feel artistic paint, which is different from Example 1 in that the modified composite fiber is obtained from Preparation Example 4.

[0087] Example 7

[0088] A skin-feel artistic paint, which is different from Example 1 in that the modified composite fiber is obtained from Preparation Example 5.

[0089] Example 8

[0090] A skin-feel artistic paint, which is different from Example 1 in that the modified composite fiber is obtained from Preparation Example 6.

[0091] Example 9

[0092] A skin-feel artistic paint, which is different from Example 1 in that the modified composite fiber is obtained from Preparation Example 7.

[0093] Example 10

[0094] A skin-feeling artistic paint, which differs from Example 1 in that 0.75 parts by weight of a functional additive is further added to the raw materials. The functional additive is composed of montmorillonite and hollow glass microspheres in a weight ratio of 0.7:1, and the functional additive is added together with natural pearl shell color flakes. At the same time, the particle size of the montmorillonite is 70 μm, and the specific surface area is 230 m 2 / g‌, and a density of 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, density is 0.35 g / cm 3 .

[0095] Example 11

[0096] A skin-feeling artistic paint, which is different from Example 10 in that the weight portion of the functional additive added is 0.5 parts.

[0097] Example 12

[0098] A skin-feeling artistic paint, which is different from Example 10 in that the weight portion of the functional additive added is 1 part.

[0099] Example 13

[0100] A skin-feeling artistic paint, 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.

[0101] Example 14

[0102] A skin-feeling artistic paint, 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.

[0103] Example 15

[0104] A skin-feeling artistic paint, 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.

[0105] Example 16

[0106] A skin-feeling artistic paint, 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, 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 a density of 0.1 g / cm 3 .

[0107] Example 17

[0108] A skin-feeling artistic paint, 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, with a density of 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 a density of 0.6 g / cm 3 .

[0109] Example 18

[0110] A skin-feeling artistic paint, which is different from Example 10 in that montmorillonite is not used in the raw materials.

[0111] Example 19

[0112] A skin-feeling artistic paint, which is different from Example 10 in that hollow glass microspheres are not used in the raw materials.

[0113] Comparative Example

[0114] Comparative Example 1

[0115] A skin-feeling artistic paint, which is different from Example 1 in that no modified composite fiber is used in the raw materials.

[0116] Comparative Example 2

[0117] A skin-feel artistic paint, which differs from Example 1 in that the mass of the modified composite fiber is replaced by a mixture of pretreated multi-walled carbon nanotubes, titanium dioxide and polyamide fibers in a corresponding weight ratio, and the specifications of the polyamide fiber are the same as those of the modified composite fiber.

[0118] Comparative Example 3

[0119] A skin-feeling artistic paint is different from comparative example 2 in that no pretreated multi-walled carbon nanotubes or titanium dioxide are used in the raw materials.

[0120] Comparative Example 4

[0121] A skin-feeling artistic paint, which is different from comparative example 2 in that no pretreated multi-walled carbon nanotubes and polyamide fibers are used in the raw materials.

[0122] Comparative Example 5

[0123] A skin-feeling artistic paint, which is different from comparative example 2 in that titanium dioxide and polyamide fiber are not used in the raw materials.

[0124] Comparative Example 6

[0125] A skin-feeling artistic paint, which is different from Example 10 in that no modified composite fiber is used in the raw materials.

[0126] Performance testing

[0127] Test samples: The skin-feeling artistic coatings obtained in Examples 1-19 were selected as test samples 1-19, and the skin-feeling artistic coatings obtained in Comparative Examples 1-6 were selected as control samples 1-6.

[0128] Test method: A standard metal plate (Q235 steel plate) with a thickness of 0.6 mm was selected as the test plate. The skin-feel artistic paint was applied to the test plate surface with a wet film thickness of 80 μm. The plate was then placed in a standard environment (temperature 23 ± 2°C, humidity 50 ± 5% RH) and cured for 10 days to obtain a standard test sample.

[0129] Ten people were randomly selected to evaluate the skin feel of the standard test samples. The skin feel evaluation was mainly conducted through smoothness and softness tests. The smoothness test was to gently stroke the coating surface with the back of the hand at a constant speed to feel the friction resistance; the softness test was to press the coating to feel the slight rebound and soft wrapping feeling similar to skin. The specific scoring criteria are as follows:

[0130] 0-3 points (excluding 3 points): very rough, not fine and smooth, average smoothness;

[0131] 3-6 points (excluding 6 points) are relatively rough, delicate, moderately supple, and moderately smooth;

[0132] 6-8 points (excluding 8 points) are relatively smooth, delicate, flexible and smooth;

[0133] 8-10 points: very smooth, delicate, very flexible, and very smooth.

[0134] The average of the scores of 10 people is taken as the initial skin feel score of the standard test sample, which is recorded as A.

[0135] 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, keep it there for 20 minutes, then cool it to -10°C at a rate of 1°C / min and hold it there for 10 minutes. Then, heat it back to 25°C at a rate of 1.5°C / min. This is recorded as one cycle. After 20 cycles, repeat the above test using the same method. The average of the 10 test scores is taken as the temperature-dependent skin feel score of the standard test sample, recorded as B.

[0136] Finally, the skin feel loss rate of the standard test sample in a temperature change environment is calculated. Skin feel loss rate = (AB) / A. The lower the skin feel loss rate, the better the skin feel stability of the skin-feel artistic paint in a drastic temperature change environment.

[0137] After the above tests were performed on the test samples 1-19 and the control samples 1-6, the test results were recorded in Table 2.

[0138] Table 2 Test results of test samples 1-19 and control samples 1-6

[0139]

[0140] Combining Example 1 and Comparative Example 1 with Table 2, it can be seen that adding a specially prepared modified composite fiber to the skin-feel art paint can significantly improve the skin-feel stability of the skin-feel art paint in a severe temperature change environment, and the skin-feel loss rate obtained by the above test is also significantly reduced. Combining Comparative Examples 2-5 with Table 2, it can be seen that the modified composite fiber contains multi-walled carbon nanotubes, titanium dioxide and polyamide. If the modified composite fiber is 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 paint in a severe temperature change environment can be improved, the improvement effect will be greatly discounted, and relative to the case of adding pretreated multi-walled carbon nanotubes, titanium dioxide or polyamide fibers separately, it is only a simple superposition of the corresponding effects. It can be seen that only when the modified composite fiber is used can the multi-walled carbon nanotubes, titanium dioxide and polyamide play an excellent synergistic role, thereby significantly improving the skin-feel stability of the skin-feel art paint in a severe temperature change environment.

[0141] Combining Example 1 with Examples 10-17 and Table 2, it can be seen that the addition of a functional additive consisting of montmorillonite and hollow glass microspheres in the skin-feel art paint can further reduce the skin-feel loss rate obtained in the above test, indicating that the skin-feel stability of the skin-feel art paint in a severe temperature change environment has been further improved. Combining Examples 18-19 and Table 2, it can be seen that if only montmorillonite or hollow glass microspheres are added, although the corresponding effect can be improved, the improvement is limited, and the sum of the improvement effects brought by the addition of each of the two separately is far less than the excellent compounding of the two. It can be seen that montmorillonite and hollow glass microspheres can play an excellent compounding synergistic role in skin-feel art paint. Combining Comparative Examples 1 and 6 with Table 2, it can be seen that if the modified composite fiber is missing from the raw materials for the preparation of the skin-feel art paint, the corresponding effect brought by the functional additive will be greatly discounted, indicating that the use of the functional additive can play a synergistic role with the modified composite fiber, thereby significantly improving the skin-feel stability of the skin-feel art paint in a severe temperature change environment.

[0142] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A skin-feeling artistic paint, characterized in that: Made from the following raw materials in parts by weight: 5-10 parts water; 20-40 parts of skin-feel resin; 10-30 parts of emulsion; 3-10 parts hand powder; 0.5-2 parts of formaldehyde removal agent; 1-5 parts of negative ion powder; 10-20 pieces of natural pearl shell colored flakes; 1-2 parts of other additives; 0.8-1.2 parts of modified composite fiber; The modified composite fiber is prepared by the following steps: S1. placing vinyl pyrrolidone, a solvent, an initiator, and multi-walled carbon nanotubes in a reaction vessel, heating under reflux for reaction, and filtering to obtain a solid product. The solid product is washed and dried to obtain pretreated multi-walled carbon nanotubes; S2. Taking a polyamide chip raw material, drying it, and then preparing a formic acid solution thereof to obtain a polyamide solution, then adding the pretreated multi-walled carbon nanotubes obtained in step S1 to the polyamide solution and stirring and mixing, adding titanium dioxide during the stirring process, and then electrospinning after mixing to obtain a modified composite fiber; In the preparation of the modified composite fiber, the weight ratio of pretreated multi-walled carbon nanotubes, titanium dioxide and polyamide is (1.6-2.4):1:(8-12); The modified composite fiber has a diameter of 100-200 nm and a length of 1-3 mm; In the preparation of the modified composite fiber, the molecular weight of the polyamide is 18,000-22,000; the diameter of the multi-walled carbon nanotube is 10-30 nm and the length is 1-2 μm; the particle size of the titanium dioxide is 20-25 nm; 0.5-1 parts by weight of a functional additive is also added to the raw materials, wherein 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; The particle size of the montmorillonite is 60-80 μm, and the specific surface area is 200-260 m 2 / g‌, density is 2-2.5 g / cm 3 The hollow glass microspheres have a particle size of 20-30 μm and a specific surface area of ​​1.8-2.0 m 2 / g‌, density is 0.1-0.6 g / cm 3 .

2. The skin-feeling artistic paint according to claim 1, characterized in that: The weight ratio of the montmorillonite to the hollow glass microspheres is 0.7:

1.

3. The skin-feeling artistic paint according to claim 1, characterized in that: The other additives are one or a combination of several of the following: dispersants, defoamers, leveling agents, wetting agents, film-forming aids, preservatives, thickeners and adhesion promoters.

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