Wear-resistant and sweat-resistant acrylic coating as well as preparation method and application thereof in electronic products

Abstract

The invention provides a wear-resistant and sweat-resistant acrylic coating as well as a preparation method and application thereof in electronic products, and belongs to the technical field of coatings. The wear-resistant and sweat-resistant acrylic coating is prepared from the following raw materials in parts by weight: 26 to 30 parts of acrylic resin, 13 to 17 parts of epoxy resin modified organic silicon resin, 5 to 8 parts of modified filler, 1.2 to 1.9 parts of adhesion promoter, 2 to 3 parts of flatting agent, 1 to 3 parts of dispersing agent, 0.5 to 1 part of defoaming agent and 80 to 100 parts of n-butyl alcohol. According to the invention, a plurality of raw materials are compounded and play a synergistic role, and the prepared coating has excellent wear resistance, sweat resistance and heat dissipation performance.

Description

Technical Field

[0001] The invention belongs to the technical field of coatings, and in particular relates to a wear-resistant and sweat-resistant acrylic coating, a preparation method thereof, and application in electronic products. Background Art

[0002] Electronic devices such as mobile phones and tablets are frequently picked up, placed, and operated in daily use, which can cause friction between the shell and hands or other objects. If the coating is not wear-resistant, it is easy to get scratched, worn, or lose its gloss under these physical contacts. In addition, many electronic devices are handheld, and the user's palms and fingers will directly contact the device shell during use. Human sweat contains salt, acid and alkali components, and other chemicals, which may corrode the coating.

[0003] In response to the above problems, domestic and foreign companies have developed some special coatings with high wear and corrosion resistance, but the heat dissipation of these coatings is often poor. As electronic products develop towards lighter, thinner and smaller sizes, the packaging density of their internal circuit components is also increasing, and the heat generated during operation is more concentrated, which also puts higher requirements on heat dissipation.

[0004] Therefore, there is an urgent need for a coating that is wear-resistant, sweat-resistant and has good heat dissipation performance to meet the use requirements of electronic components and thus extend the service life of electronic components. Summary of the invention

[0005] The invention aims to provide a wear-resistant and sweat-resistant acrylic paint, a preparation method thereof and application of the paint in electronic products.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A wear-resistant and sweat-resistant acrylic paint comprises the following raw materials in parts by weight: 26-30 parts of acrylic resin, 13-17 parts of epoxy resin-modified silicone resin, 5-8 parts of modified filler, 1.2-1.9 parts of adhesion promoter, 2-3 parts of leveling agent, 1-3 parts of dispersant, 0.5-1 parts of defoamer and 80-100 parts of n-butanol;

[0008] The preparation method of the acrylic resin comprises the following steps:

[0009] (1) Weigh the following raw materials in parts by weight: 45-48 parts of acrylic acid ester monomer, 0.4-0.7 parts of olefinic acid, 1-1.3 parts of tert-butyl peroxybenzoate, and 50-55 parts of butyl ester;

[0010] (2) adding 1 / 2-2 / 3 of the formula amount of butyl ester to a reaction kettle; mixing the acrylic ester monomer, alkene acid and 60-65% of the formula amount of tert-butyl peroxybenzoate to obtain a mixture;

[0011] (3) The reaction kettle is stirred and heated to 120-125° C., the mixture is added dropwise, the addition is completed over 3-4 hours, the temperature is kept at this temperature for 2-3 hours, the remaining tert-butyl peroxybenzoate is added dropwise, the addition is completed over 1-2 hours, the temperature is kept at this temperature for 2-3 hours, and then the temperature is lowered to 80-85° C., the remaining butyl peroxide is added, and the mixture is mixed and stirred for 30-40 minutes; the temperature is lowered to room temperature to obtain an acrylic resin.

[0012] Furthermore, the acrylic acid ester monomers include hydroxy acrylic acid ester monomers and non-hydroxy acrylic acid ester monomers in a weight ratio of (6-8):41.

[0013] Furthermore, the non-hydroxyl acrylic acid ester monomer comprises butyl acrylate, methyl methacrylate, isooctyl acrylate and n-butyl methacrylate in a weight ratio of (1-3): (27-30): (3-6): (12-14).

[0014] Furthermore, the hydroxy acrylate monomer is hydroxyethyl acrylate.

[0015] Furthermore, the alkene acid is methacrylic acid.

[0016] Acrylic paint is a kind of paint widely used in the field of electronic products. Electronic products have very high requirements for the wear resistance of the paint and need to withstand long-term friction and wear. However, when ordinary commercially available acrylic resins are used for electronic product coatings, the wear resistance is poor and cannot meet the high demand of manufacturers. In view of this problem, the present invention uses acrylic resins prepared by acrylic ester monomers and olefinic acid to improve the wear resistance of acrylic paint at room temperature. In the present invention, the acrylic ester monomer formula adopts a combination of hydroxy acrylate monomers and non-hydroxy acrylate monomers. The presence of hydroxy acrylate monomers helps the subsequent cross-linking reaction, thereby enhancing the wear resistance of the resin; and the non-hydroxy acrylate monomers include a specific ratio of butyl acrylate, methyl methacrylate, isooctyl acrylate and n-butyl methacrylate, and by adjusting their ratios, different monomers can form a molecular structure with a specific segment after polymerization, while maintaining the flexibility of the resin, while improving the wear resistance of the paint. However, the sweat resistance of acrylic paint under this condition is not ideal.

[0017] Furthermore, the preparation method of the epoxy resin modified silicone resin comprises the following steps: adding 80-85 parts by weight of a hydroxyl-terminated phenylmethylsiloxane-dimethylsiloxane copolymer, 28-32 parts by weight of an epoxy resin and 3-5 parts by weight of dibutyltin dilaurate into a reaction kettle, heating to 70-75°C with stirring, and maintaining for 30-40 minutes; heating to 110-115°C, reacting for 6-8 hours, and then heating the reaction system to 160-165°C, maintaining for 30-40 minutes, and removing low-boiling substances at 180°C and 1.5KPa for 1 hour to obtain the epoxy resin modified silicone resin.

[0018] Hydroxy-terminated phenyl methylsiloxane-dimethylsiloxane copolymer was purchased from Anhui IOTA Silicone Oil Co., Ltd., model phenyl hydroxy silicone oil IOTA2207.

[0019] Further, the epoxy resin comprises epoxy resin I, epoxy resin II and epoxy resin III in a weight ratio of 1: (1.3-1.5): (0.4-0.7); wherein the epoxy equivalent of epoxy resin I is 450-500 g / eq, and the model is Nan Ya NPES-901. The epoxy equivalent of epoxy resin II is 184-190 g / eq, and the model is Nan Ya NPEL-128. The epoxy equivalent of epoxy resin III is 160-180 g / eq, and the model is Nan Ya NPEF-170.

[0020] Organic silicon resin has excellent weather resistance and chemical resistance, and can resist corrosive substances such as salt, acid and alkali components in sweat. In order to improve the sweat resistance of the coating, the present invention attempts to add organic silicon resin to the system, but the improvement effect is not ideal. The present invention can improve the sweat resistance of the coating by modifying the organic silicon resin and compounding it with acrylic resin. Analysis shows that the organic silicon resin modified with epoxy resin has better compatibility with the acrylic resin prepared by the present invention, and can form a more complex three-dimensional network structure, thereby improving the sweat resistance of the coating. Electronic products are prone to heat generation after long-term use. In the system of the present invention, when the epoxy resin modified organic silicon resin prepared by compounding three epoxy resins in a specific ratio is mixed with the acrylic resin prepared by compounding hydroxy acrylate monomers and non-hydroxy acrylate monomers, the wear resistance of the coating at high temperatures can be improved.

[0021] Furthermore, the preparation method of the modified filler comprises the following steps:

[0022] (1) mixing boron nitride, zinc oxide and silicon dioxide to obtain a filler;

[0023] (2) Under a nitrogen atmosphere, 2-4 parts by weight of polyethyleneimine and 7-9 parts by weight of water are mixed to obtain a polyethyleneimine aqueous solution, and the polyethyleneimine aqueous solution is mixed with 1-1.5 parts by weight of a filler, stirred at 64-66° C. for 5-8 hours, centrifuged, and dried to obtain a modified filler.

[0024] Furthermore, the weight ratio of boron nitride, zinc oxide and silicon dioxide is 1:(0.3-0.6):(1.3-1.6).

[0025] The leveling agent is BYK300, the dispersant is BYK-180, and the defoamer is BYK-022, all of which were purchased from BYK Chemical Company of Germany.

[0026] The adhesion promoter is silane coupling agent KH560.

[0027] The present invention can improve the heat dissipation of the coating by adding modified fillers. Analysis shows that by modifying boron nitride, zinc oxide and silicon dioxide, their compatibility with other components in the system can be improved. By adding high thermal conductivity boron nitride, zinc oxide and silicon dioxide and modifying them, a continuous heat conduction network can be formed inside the coating, thereby effectively conducting heat away from the heat source.

[0028] The invention provides a method for preparing the wear-resistant and sweat-resistant acrylic paint. The method comprises the following steps: mixing raw materials, heating to 45-47° C., stirring evenly and cooling to room temperature to obtain the wear-resistant and sweat-resistant acrylic paint.

[0029] The invention provides application of wear-resistant and sweat-resistant acrylic paint in electronic products.

[0030] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0031] 1. The present invention uses acrylic resin prepared from acrylic ester monomers and alkene acid to improve the wear resistance of acrylic paint.

[0032] 2. The present invention can improve the sweat resistance of the coating by modifying the organic silicon resin and compounding it with acrylic resin.

[0033] 3. When the epoxy resin modified silicone resin prepared by compounding three epoxy resins in a specific ratio is mixed with the acrylic resin prepared by compounding hydroxy acrylate monomers and non-hydroxy acrylate monomers, the wear resistance of the coating at high temperatures can be improved.

[0034] 4. The present invention can improve the heat dissipation of the coating by adding modified fillers. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1

[0037] The present embodiment provides a wear-resistant and sweat-resistant acrylic coating, comprising the following raw materials in parts by weight: 27 parts of acrylic resin, 15 parts of epoxy resin-modified silicone resin, 7 parts of modified filler, 1.6 parts of adhesion promoter, 2.6 parts of leveling agent, 1.8 parts of dispersant, 0.7 parts of defoaming agent and 90 parts of n-butanol.

[0038] The leveling agent is BYK300. The dispersant is BYK-180. The defoamer is BYK-022. All of them are purchased from BYK Chemical Company of Germany. The adhesion promoter is silane coupling agent KH560.

[0039] The preparation method of the acrylic resin comprises the following steps:

[0040] (1) Weigh the following raw materials in parts by weight: 46 parts of acrylic acid monomer, 0.6 parts of alkene acid, 1.2 parts of tert-butyl peroxybenzoate, and 52 parts of butyl ester;

[0041] (2) adding 1 / 2 of the formula amount of butyl ester to a reaction kettle; mixing the acrylic ester monomer, alkene acid and 62% of the formula amount of tert-butyl peroxybenzoate to obtain a mixture;

[0042] (3) The reaction kettle was stirred and heated to 122° C., and the mixture was added dropwise. The addition was completed over 3.5 hours, and the temperature was kept at this temperature for 2.6 hours. The remaining tert-butyl peroxybenzoate was added dropwise over 1.6 hours, and the temperature was kept at this temperature for 2.6 hours. The temperature was then lowered to 82° C., the remaining butyl peroxide was added, and the mixture was mixed and stirred for 35 minutes; the temperature was lowered to room temperature to obtain an acrylic resin.

[0043] The acrylic acid ester monomers include hydroxy acrylic acid ester monomers and non-hydroxy acrylic acid ester monomers in a weight ratio of 7:41. The non-hydroxy acrylic acid ester monomers include butyl acrylate, methyl methacrylate, isooctyl acrylate and n-butyl methacrylate in a weight ratio of 2:29:5:13.

[0044] The hydroxy acrylate monomer is hydroxyethyl acrylate. The alkene acid is methacrylic acid.

[0045] The preparation method of epoxy resin modified silicone resin comprises the following steps: adding 82 parts by weight of hydroxyl-terminated phenylmethylsiloxane-dimethylsiloxane copolymer, 30 parts by weight of epoxy resin and 4 parts by weight of dibutyltin dilaurate into a reaction kettle, heating to 72°C under stirring and maintaining for 35 minutes; heating to 112°C and reacting for 7 hours, then heating the reaction system to 162°C and maintaining for 35 minutes, removing low boiling points at 180°C and 1.5 KPa for 1 hour to obtain epoxy resin modified silicone resin.

[0046] Hydroxy-terminated phenyl methylsiloxane-dimethylsiloxane copolymer was purchased from Anhui IOTA Silicone Oil Co., Ltd., model phenyl hydroxy silicone oil IOTA2207.

[0047] The epoxy resin includes epoxy resin I, epoxy resin II and epoxy resin III in a weight ratio of 1:1.4:0.6; wherein the epoxy equivalent of epoxy resin I is 450-500 g / eq, and the model is Nan Ya NPES-901. The epoxy equivalent of epoxy resin II is 184-190 g / eq, and the model is Nan Ya NPEL-128. The epoxy equivalent of epoxy resin III is 160-180 g / eq, and the model is Nan Ya NPEF-170.

[0048] The preparation method of the modified filler comprises the following steps:

[0049] (1) Boron nitride, zinc oxide and silicon dioxide are mixed in a weight ratio of 1:0.5:1.5 to obtain a filler; the particle size of the boron nitride is 50-100 nm and the specific surface area is 20-30 m 2 / g; the particle size of zinc oxide is 30-50nm, and the specific surface area is 15-30m 2 / g; the particle size of silicon dioxide is 10-20nm, and the specific surface area is 200-250m 2 / g;

[0050] (2) Under a nitrogen atmosphere, 3 parts by mass of polyethyleneimine and 8 parts by mass of water were mixed to obtain a polyethyleneimine aqueous solution. The polyethyleneimine aqueous solution was mixed with 1.3 parts by mass of a filler, stirred at 65° C. for 7 h, centrifuged, and dried to obtain a modified filler.

[0051] The preparation method of the wear-resistant and sweat-resistant acrylic paint comprises the following steps: mixing raw materials, heating to 46° C., stirring evenly and cooling to room temperature to obtain the wear-resistant and sweat-resistant acrylic paint.

[0052] Example 2

[0053] The present embodiment provides a wear-resistant and sweat-resistant acrylic coating, comprising the following raw materials in parts by weight: 26 parts of acrylic resin, 17 parts of epoxy resin-modified silicone resin, 5 parts of modified filler, 1.9 parts of adhesion promoter, 2 parts of leveling agent, 3 parts of dispersant, 0.5 parts of defoaming agent and 100 parts of n-butanol.

[0054] The leveling agent is BYK300. The dispersant is BYK-180. The defoamer is BYK-022. All of them are purchased from BYK Chemical Company of Germany. The adhesion promoter is silane coupling agent KH560.

[0055] The preparation method of the acrylic resin comprises the following steps:

[0056] (1) Weigh the following raw materials in parts by weight: 45 parts of acrylic acid monomer, 0.7 parts of olefinic acid, 1 part of tert-butyl peroxybenzoate, and 55 parts of butyl ester;

[0057] (2) adding 2 / 3 of the formula amount of butyl ester into a reaction kettle; mixing the acrylic ester monomer, alkene acid and 60% of the formula amount of tert-butyl peroxybenzoate to obtain a mixture;

[0058] (3) The reaction kettle is stirred and heated to 120° C., and the mixture is added dropwise. The addition is completed over 4 hours, and the temperature is kept at this temperature for 2 hours. The remaining tert-butyl peroxybenzoate is added dropwise. The addition is completed over 2 hours, and the temperature is kept at this temperature for 3 hours. The temperature is then lowered to 80° C., and the remaining butyl peroxide is added. The mixture is mixed and stirred for 40 minutes; the temperature is lowered to room temperature to obtain an acrylic resin.

[0059] The acrylic acid ester monomers include hydroxy acrylic acid ester monomers and non-hydroxy acrylic acid ester monomers in a weight ratio of 6:41. The non-hydroxy acrylic acid ester monomers include butyl acrylate, methyl methacrylate, isooctyl acrylate and n-butyl methacrylate in a weight ratio of 1:27:6:14.

[0060] The hydroxy acrylate monomer is hydroxyethyl acrylate. The alkene acid is methacrylic acid.

[0061] The preparation method of epoxy resin modified silicone resin comprises the following steps: adding 85 parts by weight of hydroxyl-terminated phenylmethylsiloxane-dimethylsiloxane copolymer, 32 parts by weight of epoxy resin and 3 parts by weight of dibutyltin dilaurate into a reaction kettle, heating to 75°C under stirring and maintaining for 30 minutes; heating to 115°C and reacting for 6 hours, then heating the reaction system to 165°C and maintaining for 30 minutes, removing low boiling points at 180°C and 1.5KPa for 1 hour to obtain epoxy resin modified silicone resin.

[0062] Hydroxy-terminated phenyl methylsiloxane-dimethylsiloxane copolymer was purchased from Anhui IOTA Silicone Oil Co., Ltd., model phenyl hydroxy silicone oil IOTA2207.

[0063] The epoxy resin comprises epoxy resin I, epoxy resin II and epoxy resin III in a weight ratio of 1:1.3:0.4; wherein the epoxy equivalent of epoxy resin I is 450-500 g / eq, and the model is Nan Ya NPES-901. The epoxy equivalent of epoxy resin II is 184-190 g / eq, and the model is Nan Ya NPEL-128. The epoxy equivalent of epoxy resin III is 160-180 g / eq, and the model is Nan Ya NPEF-170.

[0064] The preparation method of the modified filler comprises the following steps:

[0065] (1) Boron nitride, zinc oxide and silicon dioxide are mixed in a weight ratio of 1:0.3:1.3 to obtain a filler; the particle size of the boron nitride is 50-100 nm and the specific surface area is 20-30 m 2 / g; the particle size of zinc oxide is 30-50nm, and the specific surface area is 15-30m 2 / g; the particle size of silicon dioxide is 10-20nm, and the specific surface area is 200-250m 2 / g;

[0066] (2) Under a nitrogen atmosphere, 4 parts by mass of polyethyleneimine and 7 parts by mass of water were mixed to obtain a polyethyleneimine aqueous solution, and the polyethyleneimine aqueous solution was mixed with 1 part by mass of a filler, stirred at 64° C. for 8 h, centrifuged, and dried to obtain a modified filler.

[0067] The preparation method of the wear-resistant and sweat-resistant acrylic paint comprises the following steps: mixing raw materials, heating to 47° C., stirring evenly and cooling to room temperature to obtain the wear-resistant and sweat-resistant acrylic paint.

[0068] Comparative Example 1

[0069] The difference between this comparative example and Example 1 is that 27 parts of acrylic resin and 15 parts of epoxy resin-modified silicone resin are replaced by 20 parts of acrylic resin and 22 parts of epoxy resin-modified silicone resin.

[0070] Comparative Example 2

[0071] The difference between this comparative example and Example 1 is that the acrylic resin is a commercially available product, brand: Allnex, model: G-CURE TM 17-0105.

[0072] Comparative Example 3

[0073] The difference between this comparative example and Example 1 is that the acrylic acid ester monomer includes a hydroxy acrylic acid ester monomer and a non-hydroxy acrylic acid ester monomer in a weight ratio of 15:41.

[0074] Comparative Example 4

[0075] The difference between this comparative example and Example 1 is that the non-hydroxy acrylate monomer includes butyl acrylate, methyl methacrylate, isooctyl acrylate and n-butyl methacrylate in a weight ratio of 1:1:1:1.

[0076] Comparative Example 5

[0077] The difference between this comparative example and Example 1 is that the hydroxy-terminated phenylmethylsiloxane-dimethylsiloxane copolymer is replaced by hydroxy-terminated polydimethylsiloxane purchased from Anhui Mingyi Silicon Industry Co., Ltd., model: hydroxy-terminated polymethylsilicone oil MY1203.

[0078] Comparative Example 6

[0079] The difference between this comparative example and Example 1 is that the epoxy resin comprises epoxy resin I, epoxy resin II and epoxy resin III in a weight ratio of 1:1:1; wherein the epoxy equivalent of epoxy resin I is 450-500 g / eq, and the model is Nan Ya NPES-901. The epoxy equivalent of epoxy resin II is 184-190 g / eq, and the model is Nan Ya NPEL-128. The epoxy equivalent of epoxy resin III is 160-180 g / eq, and the model is Nan Ya NPEF-170.

[0080] Comparative Example 7

[0081] The difference between this comparative example and Example 1 is that boron nitride, zinc oxide and silicon dioxide are mixed in a weight ratio of 1:1:1 to obtain a filler.

[0082] Comparative Example 8

[0083] The difference between this comparative example and Example 1 is that the preparation method of the modified filler comprises the following steps:

[0084] (1) mixing boron nitride, zinc oxide and silicon dioxide in a weight ratio of 1:0.5:1.5 to obtain a filler;

[0085] (2) Under a nitrogen atmosphere, 0.2 parts by mass of silane coupling agent KH560, 1.3 parts by mass of filler and 8 parts by mass of water were mixed, stirred at 45° C. for 2 h, centrifuged and dried to obtain a modified filler.

[0086] Comparative Example 9

[0087] The difference between this comparative example and Example 1 is that the particle size of boron nitride is 200-250nm and the specific surface area is 5-10m 2 / g; the particle size of zinc oxide is 100-150nm, and the specific surface area is 10-15m 2 / g; the particle size of silicon dioxide is 60-80nm, and the specific surface area is 130-180m 2 / g.

[0088] Performance Testing

[0089] The wear-resistant and sweat-resistant acrylic coatings of Examples 1-2 and Comparative Examples 1-9 were subjected to performance tests.

[0090] 1. Sweat resistance: measured in accordance with EU standard I5012870;

[0091] 2. Room temperature wear resistance: Refer to ISO7784-2:2016, test at temperature (23±2)℃ and relative humidity (50±5)% to measure the wear resistance of the coating (750g / 500r);

[0092] 3. High temperature wear resistance: Refer to ISO7784-2:2016, test at temperature (43±2)℃ and relative humidity (50±5)% to measure the wear resistance of the coating (750g / 500r);

[0093] 4. Heat dissipation: The thermal conductivity test is carried out in accordance with ASTM-D5470 and GB / T1410-2006.

[0094] Table 1 Performance test results

[0095]

[0096]

[0097] From the above performance test results, it can be seen that the acrylic coatings of Examples 1-2 have excellent wear resistance, sweat resistance and heat dissipation effects, especially the comprehensive performance of Example 1 is the most outstanding, which is mainly due to the synergistic effect between the components of the coating.

[0098] The comparative examples, however, are significantly inferior to the embodiments in the corresponding performance tests because they do not adopt the necessary technical solutions. In comparative example 1, the ratio of acrylic resin and epoxy resin modified silicone resin is changed, and it can be seen that the comprehensive effect of the coating is reduced; the acrylic resin used in comparative example 2 is a commercially available product, and it can be seen that the wear resistance of the coating is reduced; the raw material ratio of the acrylic resin prepared in comparative examples 3-4 is changed, which also affects the wear resistance of the coating; the raw materials for preparing epoxy resin modified silicone resin in comparative examples 5-6 are changed, and the sweat resistance of the coating is reduced; it can also be found that in comparative examples 3-4 and comparative example 6, the three epoxy resins, hydroxy acrylate monomers and non-hydroxy acrylate monomers are changed, resulting in a decrease in the wear resistance of the coating at high temperatures. Comparative examples 7-9 respectively change the parameters, ratios and modification methods of the fillers, and it is found that the heat dissipation of the coating is reduced to varying degrees. The above experimental results further prove the importance of the technical solution defined in the present invention for its technical effect.

[0099] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A wear-resistant and sweat-resistant acrylic paint, characterized in that: The invention comprises the following raw materials in parts by weight: 26-30 parts of acrylic resin, 13-17 parts of epoxy resin modified silicone resin, 5-8 parts of modified filler, 1.2-1.9 parts of adhesion promoter, 2-3 parts of leveling agent, 1-3 parts of dispersant, 0.5-1 parts of defoamer and 80-100 parts of n-butanol; The preparation method of the acrylic resin comprises the following steps: (1) Weigh the following raw materials in parts by weight: 45-48 parts of acrylic acid ester monomer, 0.4-0.7 parts of olefinic acid, 1-1.3 parts of tert-butyl peroxybenzoate, and 50-55 parts of butyl ester; (2) adding 1 / 2-2 / 3 of the formula amount of butyl ester to a reaction kettle; mixing the acrylic ester monomer, alkene acid and 60-65% of the formula amount of tert-butyl peroxybenzoate to obtain a mixture; (3) The reaction kettle is heated to 120-125° C. with stirring, and the mixture is added dropwise. The addition is completed over 3-4 hours, and the temperature is kept at this temperature for 2-3 hours. The remaining tert-butyl peroxybenzoate is added dropwise over 1-2 hours, and the temperature is kept at this temperature for 2-3 hours. The temperature is then lowered to 80-85° C., and the remaining butyl peroxide is added. The mixture is mixed and stirred for 30-40 minutes. The temperature is then lowered to room temperature to obtain an acrylic resin.

2. The wear-resistant and sweat-resistant acrylic paint according to claim 1, characterized in that: The acrylic ester monomers include hydroxy acrylic ester monomers and non-hydroxy acrylic ester monomers in a weight ratio of (6-8):

41.

3. The wear-resistant and sweat-resistant acrylic paint according to claim 2, characterized in that: The non-hydroxyl acrylic acid ester monomers include butyl acrylate, methyl methacrylate, isooctyl acrylate and n-butyl methacrylate in a weight ratio of (1-3): (27-30): (3-6): (12-14).

4. The wear-resistant and sweat-resistant acrylic paint according to claim 2, characterized in that: The hydroxy acrylate monomer is hydroxyethyl acrylate; and the alkene acid is methacrylic acid.

5. The wear-resistant and sweat-resistant acrylic paint according to claim 1, characterized in that: The preparation method of the epoxy resin modified silicone resin comprises the following steps: adding 80-85 parts by weight of a hydroxyl-terminated phenylmethylsiloxane-dimethylsiloxane copolymer, 28-32 parts by weight of an epoxy resin and 3-5 parts by weight of dibutyltin dilaurate into a reaction kettle, heating the reaction kettle to 70-75° C. and maintaining the temperature for 30-40 minutes under stirring; heating the reaction kettle to 110-115° C. and reacting for 6-8 hours; then heating the reaction system to 160-165° C. and maintaining the temperature for 30-40 minutes, removing low-boiling substances, and obtaining the epoxy resin modified silicone resin.

6. The wear-resistant and sweat-resistant acrylic paint according to claim 5, characterized in that: The epoxy resin comprises epoxy resin I, epoxy resin II and epoxy resin III in a weight ratio of 1: (1.3-1.5): (0.4-0.7); wherein the epoxy equivalent of epoxy resin I is 450-500 g / eq; the epoxy equivalent of epoxy resin II is 184-190 g / eq; and the epoxy equivalent of epoxy resin III is 160-180 g / eq.

7. The wear-resistant and sweat-resistant acrylic paint according to claim 1, characterized in that: The preparation method of the modified filler comprises the following steps: (1) mixing boron nitride, zinc oxide and silicon dioxide to obtain a filler; (2) Under a nitrogen atmosphere, 2-4 parts by weight of polyethyleneimine and 7-9 parts by weight of water are mixed to obtain a polyethyleneimine aqueous solution, and the polyethyleneimine aqueous solution is mixed with 1-1.5 parts by weight of a filler, stirred at 64-66° C. for 5-8 hours, centrifuged, and dried to obtain a modified filler.

8. The wear-resistant and sweat-resistant acrylic paint according to claim 7, characterized in that: The weight ratio of boron nitride, zinc oxide and silicon dioxide is 1:(0.3-0.6):(1.3-1.6).

9. A method for preparing the wear-resistant and sweat-resistant acrylic paint according to any one of claims 1 to 8, characterized in that: The preparation method comprises the following steps: mixing the raw materials, heating to 45-47° C., stirring evenly and cooling to room temperature to obtain a wear-resistant and sweat-resistant acrylic paint.

10. Use of the wear-resistant and sweat-resistant acrylic paint according to any one of claims 1 to 8 in electronic products.

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