CN113698806B - High-water-resistance wear-resistant ceramic texture coating, preparation method and electronic appearance structural member - Google Patents

High-water-resistance wear-resistant ceramic texture coating, preparation method and electronic appearance structural member Download PDF

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CN113698806B
CN113698806B CN202110986226.3A CN202110986226A CN113698806B CN 113698806 B CN113698806 B CN 113698806B CN 202110986226 A CN202110986226 A CN 202110986226A CN 113698806 B CN113698806 B CN 113698806B
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周涛
温兵
赵立宏
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Shenzhen Jingermei Technology Co ltd
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    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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Abstract

The invention discloses a high-water-resistance wear-resistant ceramic texture coating, a preparation method and an electronic appearance structural member, wherein the coating comprises self-emulsifying polyester polyurethane resin modified acrylic emulsion with reactive groups, and the compatibility of silicone acrylic emulsion and polyurethane dispersion liquid is improved through the grafting effect of double-bond reactive groups, so that the water resistance and wear resistance of a coating are improved.

Description

High-water-resistance wear-resistant ceramic texture coating, preparation method and electronic appearance structural member
Technical Field
The invention belongs to the field of electronic material coatings, and particularly relates to a high-water-resistance wear-resistant ceramic texture coating, a preparation method and an electronic appearance structural member.
Background
With the arrival of 5G communication, plastic back covers for smart phones gradually return to the public, and plastics such as polycarbonate have excellent mechanical properties as back covers for consumer electronics, including impact resistance, thermal stability, flame retardancy, optical properties such as light transmittance, and the like. However, because of the inherent low hardness and poor weatherability of common plastics, articles made from plastics often exhibit limitations for outdoor use, which are undesirable for applications such as vehicle windows, cell phone screens, vending machine screens, outdoor electronic device housings, and advertising signs. Therefore, surface modification or material modification of plastic materials is required to improve the hardness and weather resistance of the surface thereof. For example, a coating with wear resistance, dirt resistance, smoothness and ceramic texture is processed on a plastic rear cover of a mobile phone, and becomes a choice with high cost performance.
The waterborne polyurethane UV curing coating has the characteristics of safety, no toxicity, environmental friendliness and the like, but compared with the traditional solvent type polyurethane UV coating, the waterborne polyurethane UV curing coating has poor water resistance and wear resistance, so that the improvement of the comprehensive performance of the waterborne polyurethane UV coating is a key point of research. In the prior art, the waterborne polyurethane can be modified by compounding organic silane, but the compatibility between two polymers is poor by a simple compounding method. In addition, organosilicon is introduced in the synthesis process of waterborne polyurethane, but the synthesis method is complex, and the requirements on experimental condition control and raw materials are high.
In addition, the plastic rear cover of the consumer electronic device often needs to consider the problems of beauty, hand-holding comfort and the like, so that the coating not only has good weather resistance and wear resistance, but also needs to increase the ceramic texture of the coating, so that the shell has good aesthetic feeling, and the development requirement of the consumer electronic device is met.
Disclosure of Invention
In view of the above, the present invention provides a high water-resistant and wear-resistant ceramic texture coating, which comprises a self-emulsifying polyester polyurethane resin modified silicone acrylic emulsion with reactive groups;
the preferable coating also comprises nano composite sol, a silane coupling agent, a reactive diluent, a photoinitiator and other auxiliaries, wherein the other auxiliaries comprise a defoaming agent and a leveling agent, and the defoaming agent and the leveling agent are commercially available and are not particularly limited;
preferably, the nanocomposite sol comprises a silica sol and an alumina sol;
preferably, the self-emulsifying polyester type polyurethane resin with reactive groups is a self-emulsifying polyester type polyurethane resin with vinyl and carboxyl, and the structural formula is as follows:
Figure BDA0003230763480000021
preferably, the reactive diluent is hydroxyethyl acrylate;
preferably, the photoinitiator is benzophenone;
preferably, the silane coupling agent is gamma-glycidoxypropyltrimethoxysilane (KH-560);
preferably, the weight percentage of the nano silicon dioxide sol and the nano aluminum oxide sol in the coating is 20-30 wt%, the weight percentage of the silicone-acrylic emulsion is 20-25 wt%, the weight percentage of the self-emulsifying polyester type polyurethane resin with vinyl and carboxyl is 25-30 wt%, the weight percentage of the active diluent is 10-15 wt%, the weight percentage of the photoinitiator is 1-5 wt%, the weight percentage of the silane coupling agent is 1-5 wt%, and the weight percentage of the auxiliary agent is 0-5 wt%;
preferably, the mass ratio of the nano silicon dioxide sol to the nano aluminum oxide sol is 1:3-2: 1;
preferably, the nano silicon dioxide sol D50 is 80nm-90nm, and the nano aluminum oxide sol D50 is 10nm-20 nm;
preferably, the solid content of the nano-silica sol is 25-30%, and the solid content of the nano-alumina sol is 15-25%.
Another object of the present invention is to provide a method for preparing the ceramic texture wear-resistant coating, as shown in fig. 1, comprising the following steps:
s1, preparing a silicone-acrylic emulsion modified with a self-emulsifying polyester polyurethane dispersion (PU) with vinyl and carboxyl groups: taking self-emulsified polyurethane dispersion liquid (PU) as a system, respectively adding 30-40 parts of Methyl Methacrylate (MMA), 25-40 parts of Butyl Acrylate (BA), 5-15 parts of acrylic acid, 5-10 parts of vinyl silicone oil, taking 3-10 parts of acetone solution of azobisisobutyronitrile as an initiator, controlling the reaction temperature at 80-85 ℃ and reacting for 1-3 h to obtain the silicone-acrylic emulsion modified by the self-emulsified polyester polyurethane dispersion liquid with vinyl and carboxyl.
S2, preparing silane coupling agent modified nano silica sol (silica sol) and nano aluminum oxide (aluminum sol) composite sol: dripping KH-560 into an acid system of the nano-silica sol and the nano-alumina sol, and reacting for 0.5-3 h at the reaction temperature of 80-90 ℃ to obtain a nano-silica sol and nano-alumina composite sol;
s3, uniformly mixing the modified silicone-acrylate emulsion prepared in the step 1 and the composite sol prepared in the step 2, and discharging to obtain the high-water-resistance wear-resistance ceramic texture coating after the reactive diluent, the photoinitiator and the auxiliary agent are uniformly mixed;
preferably, in the step S2, the mass ratio of the nano silica sol to the nano aluminum sol is 1:3-2:1, the nano silica sol D50 is 80nm-90nm, and the nano aluminum sol D50 is 10nm-20 nm; the solid content of the nano silicon dioxide sol is 25-30 percent, and the solid content of the nano aluminum oxide sol is 15-25 percent;
preferably, in step S3, the reactive diluent is 10 wt% to 15 wt%, the photoinitiator is 1 wt% to 5 wt%, and the defoamer and the leveling agent are 0 wt% to 5 wt%, wherein the reactive diluent is hydroxyethyl acrylate, and the photoinitiator is benzophenone.
The invention also aims to provide an electronic appearance structural part, which is prepared by coating a layer of fingerprint-resistant ceramic texture paint on an electronic appearance plastic base material by the prior art such as spraying or printing, then putting the electronic appearance structural part into an oven, drying the electronic appearance structural part for 3-5min by hot air at 35-50 ℃, and then carrying out ultraviolet curing treatment by using a photocuring machine, wherein the preferable ultraviolet treatment conditions are as follows: UV energy is 300-500 mJ/cm2UV intensity of 30 to 50mw/cm2。
The invention has the beneficial effects that:
the modified silicone-acrylate emulsion is prepared by free radical polymerization in the self-emulsifying polyester type polyurethane dispersion liquid with vinyl and carboxyl, the compatibility of the silicone-acrylate emulsion and the polyurethane dispersion liquid is improved by double bond grafting, and the silicone-acrylate emulsion has the characteristics of organic silicon and polyacrylate, so that the formed coating has low surface tension, good water resistance and high hardness.
By adding silica sol and aluminum sol compounded with different particle sizes as inorganic fillers with higher filling degree, the formed coating is fine, smooth and has ceramic texture; meanwhile, the silica sol and the aluminum sol are modified by the silane coupling agent to improve the compatibility with the system, because the nano silicon dioxide, the nano aluminum oxide and the silane coupling agent have stronger affinity, the silane is hydrolyzed in the presence of an acid catalyst to generate silanol, 1 hydroxyl of the silanol can be condensed with the hydroxyl on the surfaces of the silica sol and the aluminum sol, so that a hydrocarbon group is connected to the surface of the silica sol, and further the silane coupling agent is modified by the silane coupling agent in the SiO 22、Al2O3The surface of the colloidal particles is subjected to polycondensation to form a compact film, which is beneficial to improving the hardness and the wear resistance of the coating.
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FIG. 1 is a schematic diagram of the preparation steps of the high water-resistant and wear-resistant ceramic texture coating.
Detailed Description
The invention is described in further detail below, wherein the starting materials and the equipment used are commercially available without particular requirement. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention.
Example 1
Adding 250g of self-emulsified polyurethane dispersion liquid (PU), respectively adding 75g of Methyl Methacrylate (MMA),87.5g of Butyl Acrylate (BA), 37.5g of acrylic acid, 25g of vinyl silicone oil and 25g of acetone solution of azobisisobutyronitrile as an initiator, controlling the temperature at 85 ℃, and reacting for 1h to obtain the silicone-acrylic emulsion modified by the self-emulsified polyester polyurethane dispersion liquid with vinyl and carboxyl.
Dripping 50gKH560 into a three-neck flask containing silica sol and aluminum sol mixed sol, and controlling the reaction temperature to 80 ℃, wherein the silica sol is 150g, and the aluminum sol is 50 g. Discharging after reacting for 3 h. The silica sol D50 was 81nm and the alumina sol D50 was 10 nm.
And (3) respectively adding the materials obtained in the first step and the second step, and then adding 150g of hydroxyethyl acrylate, 50g of benzophenone, 50g of flatting agent and defoaming agent, and mixing to obtain the target coating.
Spraying a layer of the coating on a PC shell, then putting the PC shell into a drying oven, drying the PC shell for 3min by hot air at 50 ℃, and then carrying out ultraviolet curing treatment by using a photocuring machine, wherein the ultraviolet curing conditions are as follows: UV energy of 300mJ/cm2UV intensity of 50mw/cm2。
Example 2
Adding 300g of self-emulsified polyurethane dispersion liquid (PU), respectively adding 60g of Methyl Methacrylate (MMA), 70g of Butyl Acrylate (BA), 30g of acrylic acid, 20g of vinyl silicone oil, and taking 20g of acetone solution of azobisisobutyronitrile as an initiator, controlling the temperature at 80 ℃, and reacting for 3h to obtain the silicone-acrylic emulsion modified by the self-emulsified polyester polyurethane dispersion liquid with vinyl and carboxyl.
50g of KH560(5 wt%) is dropped into a three-necked flask containing silica sol and aluminum sol mixed sol, and the reaction temperature is controlled at 90 ℃, wherein the silica sol is 150g, and the aluminum sol is 50 g. After 0.5h of reaction, the silica sol D50 was 89nm and the alumina sol D50 was 19 nm.
And (3) respectively adding the materials obtained in the first step and the second step, and then adding 150g of hydroxyethyl acrylate, 50g of benzophenone, 50g of flatting agent and defoaming agent, and mixing to obtain the target coating.
Spraying a layer of the coating on a PC shell, then putting the PC shell into a drying oven, drying the PC shell for 3min by hot air at 50 ℃, and then carrying out ultraviolet curing treatment by using a photocuring machine, wherein the ultraviolet curing conditions are as follows: UV energy was 300mJ/cm2, UV intensity was 50mw/cm 2.
Example 3
Adding 250g of self-emulsified polyurethane dispersion liquid (PU), respectively adding 75g of Methyl Methacrylate (MMA),87.5g of Butyl Acrylate (BA), 37.5g of acrylic acid, 25g of vinyl silicone oil and 25g of acetone solution of azobisisobutyronitrile as an initiator, controlling the temperature at 85 ℃, and reacting for 1h to obtain the silicone-acrylic emulsion modified by the self-emulsified polyester polyurethane dispersion liquid with vinyl and carboxyl.
50g of KH560 is dropped into a three-neck flask filled with silica sol and aluminum sol mixed sol, and the reaction temperature is controlled at 80 ℃, wherein the weight of the silica sol is 187.5g and the weight of the aluminum sol is 62.5 g. After reacting for 3h, the silica sol D50 was 82nm, and the alumina sol D50 was 12 nm.
And (3) respectively adding the materials obtained in the first step and the second step, and then adding 150g of hydroxyethyl acrylate and 50g of benzophenone to obtain the target coating.
Spraying a layer of the coating on a PC shell, then putting the PC shell into a drying oven, drying the PC shell for 3min by hot air at 50 ℃, and then carrying out ultraviolet curing treatment by using a photocuring machine, wherein the ultraviolet curing conditions are as follows: UV energy of 300mJ/cm2UV intensity of 50mw/cm2。
Example 4
Adding 250g of self-emulsified polyurethane dispersion liquid (PU), respectively adding 75g of Methyl Methacrylate (MMA),87.5g of Butyl Acrylate (BA), 37.5g of acrylic acid, 25g of vinyl silicone oil, and taking 25g of acetone solution of azobisisobutyronitrile as an initiator, controlling the temperature at 85 ℃, and reacting for 2h to obtain the silicone-acrylic emulsion modified by the self-emulsified polyester polyurethane dispersion liquid with vinyl and carboxyl.
50g of KH560(5 wt%) is dropped into a three-necked flask containing silica sol and aluminum sol mixed sol, and the reaction temperature is controlled at 80 ℃, wherein the silica sol is 125g, and the aluminum sol is 125 g. After reacting for 3h, the silica sol D50 was 86nm and the alumina sol D50 was 17 nm.
And (3) respectively adding the materials obtained in the first step and the second step, and then adding 150g of hydroxyethyl acrylate and 50g of benzophenone to obtain the target coating.
Spraying a layer of the coating on a PC shell, then putting the PC shell into a drying oven, drying the PC shell for 3min by hot air at 50 ℃, and then carrying out ultraviolet curing treatment by using a photocuring machine, wherein the ultraviolet curing conditions are as follows: UV energy of 300mJ/cm2UV intensity of 50mw/cm2。
Example 5
Adding 250g of self-emulsified polyurethane dispersion liquid (PU), respectively adding 75g of Methyl Methacrylate (MMA),87.5g of Butyl Acrylate (BA), 37.5g of acrylic acid, 25g of vinyl silicone oil, and taking 25g of acetone solution of azobisisobutyronitrile as an initiator, controlling the temperature at 85 ℃, and reacting for 2h to obtain the silicone-acrylic emulsion modified by the self-emulsified polyester polyurethane dispersion liquid with vinyl and carboxyl.
50g of KH560 is dropped into a three-neck flask filled with silica sol and aluminum sol mixed sol, and the reaction temperature is controlled at 80 ℃, wherein the weight of the silica sol is 83.3g and the weight of the aluminum sol is 166.7 g. After reacting for 3h, the silica sol D50 was 86nm and the alumina sol D50 was 17 nm.
And (3) respectively adding the materials obtained in the first step and the second step, and then adding 150g of hydroxyethyl acrylate and 50g of benzophenone to obtain the target coating.
Spraying a layer of the coating on a PC shell, then putting the PC shell into a drying oven, drying the PC shell for 3min by hot air at 50 ℃, and then carrying out ultraviolet curing treatment by using a photocuring machine, wherein the ultraviolet curing conditions are as follows: UV energy of 300mJ/cm2UV intensity of 50mw/cm2。
Comparative example 1 (silica sol, alumina sol not treated with silane coupling agent)
Adding 250g of self-emulsified polyurethane dispersion liquid (PU), respectively adding 75g of Methyl Methacrylate (MMA),87.5g of Butyl Acrylate (BA), 37.5g of acrylic acid, 25g of vinyl silicone oil, and taking 25g of acetone solution of azobisisobutyronitrile as an initiator, controlling the temperature at 85 ℃, and reacting for 2h to obtain the silicone-acrylic emulsion modified by the self-emulsified polyester polyurethane dispersion liquid with vinyl and carboxyl.
And directly adding a mixed sol of silica sol and aluminum sol into the emulsion, wherein the silica sol is 83.3g, the aluminum sol is 166.7g, (the silica sol D50 is 86nm, and the aluminum sol D50 is 17nm), then adding 150g of hydroxyethyl acrylate, and 50g of benzophenone are the target coating.
Spraying a layer of the coating on a PC shell, then putting the PC shell into a drying oven, drying the PC shell for 3min by hot air at 50 ℃, and then carrying out ultraviolet curing treatment by using a photocuring machine, wherein the ultraviolet curing conditions are as follows: UV energy of 300mJ/cm2UV intensity of 50mw/cm2。
Comparative example 2 (direct combination of polymerized Silicone acrylic emulsion and polyurethane Dispersion)
50g of KH560 is dropped into a three-neck flask filled with silica sol and aluminum sol mixed sol, and the reaction temperature is controlled at 80 ℃, wherein the weight of the silica sol is 83.3g and the weight of the aluminum sol is 166.7 g. Discharging after reacting for 3 hours. Then adding 250g of silicone-acrylic emulsion, 250g of self-emulsified polyurethane dispersion (PU), 150g of hydroxyethyl acrylate and 50g of benzophenone to obtain the target coating.
Spraying a layer of the coating on a PC shell, then putting the PC shell into a drying oven, drying the PC shell for 3min by hot air at 50 ℃, and then carrying out ultraviolet curing treatment by using a photocuring machine, wherein the ultraviolet curing conditions are as follows: UV energy of 300mJ/cm2UV intensity of 50mw/cm2。
Comparative example 3 (Using only Large particle silica sol)
Adding 250g of self-emulsified polyurethane dispersion liquid (PU), respectively adding 75g of Methyl Methacrylate (MMA),87.5g of Butyl Acrylate (BA), 37.5g of acrylic acid, 25g of vinyl silicone oil, and taking 25g of acetone solution of azobisisobutyronitrile as an initiator, controlling the temperature at 85 ℃, and reacting for 2h to obtain the silicone-acrylic emulsion modified by the self-emulsified polyester polyurethane dispersion liquid with vinyl and carboxyl.
Dripping 50g KH560 into a three-neck flask filled with silica sol and aluminum sol mixed sol, controlling the reaction temperature to be 80 ℃, wherein the silica sol is 250g, reacting for 3h, and discharging, wherein the silica sol D50 is 89 nm.
And (3) respectively adding the materials obtained in the first step and the second step, and then adding 150g of hydroxyethyl acrylate and 50g of benzophenone to obtain the target coating. Spraying a layer of the coating on a PC shell, then putting the PC shell into a drying oven, drying the PC shell for 3min by hot air at 50 ℃, and then carrying out ultraviolet curing treatment by using a photocuring machine, wherein the ultraviolet curing conditions are as follows: UV energy of 300mJ/cm2UV intensity of 50mw/cm2。
Comparative example 4 (direct use of a commercially available polyurethane dispersion)
A contrast coating is prepared by adding 150g of hydroxyethyl acrylate, 50g of benzophenone, 50g of defoamer and a leveling agent into 250g of commercially available waterborne polyurethane photocuring dispersion (scientific UV 2282). Spraying a layer of contrast coating on a PC shell, then putting the PC shell into an oven, drying the PC shell for 3min by hot air at 50 ℃, and then carrying out ultraviolet curing treatment by using a photocuring machine, wherein the ultraviolet treatment conditions are as follows: UV energy of 300mJ/cm2UV intensity of 50mw/cm2。
The above examples are illustrated by comparing hardness, abrasion resistance, water resistance and smoothness with comparative examples.
1. Hardness of
The pencil hardness test method is adopted: the test was carried out according to the method of GBT 6739-.
2. Wear resistance
1) Fixing the test piece prepared from the coatings 1-6 on a wear-resistant tester, wherein the area of a contact head is 1 x 1cm2Binding 0000# steel wool on the contact friction probe;
2) applying 1000g test load above the probe, testing for 35-40 times/min, 3-4cm stroke, recording reciprocating friction times until abrasion stops (no observation after more than 2 ten thousand times, recording more than 2 ten thousand times).
3. Water resistance
Water resistance is primarily determined by the contact angle test, with greater contact with water indicating better water resistance of the coating.
4. Smoothness of the surface
The smoothness is classified into A, B, C grades, A is fine and smooth and has ceramic texture, and the best smoothness is obtained; c is the non-fine and the worst granular sensation, and B is the middle grade.
TABLE 1 data of test results of examples and comparative examples
Figure BDA0003230763480000081
Figure BDA0003230763480000091
The embodiment 1 and the embodiment 2 adopt silicone-acrylic emulsion and aqueous polyurethane dispersion (PU) with different proportions, and when the content of the silicone-acrylic emulsion is more, the wear resistance and the water resistance of the silicone-acrylic emulsion are improved; in examples 3, 4 and 5, the ratio of silica sol to aluminum sol was adjusted under the condition of superior effect, and it was found that the abrasion resistance was better when the content of silica sol was larger. Comparative example 1 mainly shows that silica sol and aluminum sol are not treated with silane coupling agent, and the combination of silica sol and aluminum sol with resin is poor, which affects hardness and wear resistance. Comparative example 2 is a direct combination of a silicone-acrylic emulsion and a self-emulsified polyurethane dispersion (PU) resulting in a decrease in hardness, abrasion resistance, water resistance; comparative example 3, which employs silica sol having a large particle size without compounding silica sol and alumina sol having a large particle size, has reduced hardness, abrasion resistance and water resistance, and does not have a ceramic texture. The commercially available aqueous polyurethane dispersion used in comparative example 4 was directly coated with other components, and it was found that the hardness, water resistance and abrasion resistance were all decreased, and the appearance thereof did not have a ceramic texture.
The foregoing description is only exemplary of the preferred embodiments of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (5)

1. The high-water-resistance wear-resistant ceramic texture coating is characterized in that: the coating comprises self-emulsifying polyester type polyurethane resin modified silicone-acrylic emulsion with reactive groups, wherein the self-emulsifying polyester type polyurethane resin with the reactive groups is self-emulsifying polyester type polyurethane resin with vinyl and carboxyl, and the structural formula is as follows:
Figure FDA0003577377090000011
the preparation method of the modified silicone-acrylate emulsion comprises the following steps: taking self-emulsified polyurethane dispersion liquid as a system, respectively adding 30-40 parts by weight of methyl methacrylate, 25-40 parts by weight of butyl acrylate, 5-15 parts by weight of acrylic acid, 5-10 parts by weight of vinyl silicone oil and 3-10 parts by weight of acetone solution of azodiisobutyronitrile, and controlling the temperature to be 80-85 ℃ to react to obtain self-emulsified polyester polyurethane resin modified silicone acrylic emulsion with vinyl and carboxyl;
the coating also comprises silane coupling agent modified composite sol of nano silicon dioxide sol and nano aluminum oxide sol, 10-15 wt% of active diluent, 1-5 wt% of photoinitiator, 0-5 wt% of defoaming agent and leveling agent, wherein the sum of the using amount of the components is 100%; the preparation method of the composite sol comprises the steps of dropwise adding KH-560 into an acid system of nano silicon dioxide sol and nano aluminum oxide sol, and reacting for 0.5-3 h at the reaction temperature of 80-90 ℃.
2. The high water-resistant abrasion-resistant ceramic-based paint as claimed in claim 1, wherein: the mass ratio of the nano silicon dioxide sol to the nano aluminum oxide sol is 1:3-2:1, the D50 of the nano silicon dioxide sol is 80nm-90nm, and the D50 of the nano aluminum oxide sol is 10nm-20 nm; the solid content of the nano silicon dioxide sol is 25-30%, and the solid content of the nano aluminum oxide sol is 15-25%.
3. The high water-resistant wear-resistant ceramic-like coating according to claim 2, characterized in that: the active diluent is hydroxyethyl acrylate, and the photoinitiator is benzophenone.
4. The preparation method of the high-water-resistance wear-resistant ceramic texture coating as claimed in claim 1, which is characterized by comprising the following steps:
s1: preparing self-emulsifying polyester type polyurethane resin modified silicone-acrylic emulsion with vinyl and carboxyl;
s2: preparing composite sol of silane coupling agent modified nano silica sol and nano alumina sol;
s3: and (4) uniformly mixing the modified silicone-acrylate emulsion prepared in the step S1 with the composite sol prepared in the step S2, the reactive diluent, the photoinitiator, the defoaming agent and the leveling agent.
5. An electronic appearance structure, characterized by: spraying the high-water-resistance wear-resistant ceramic texture coating of claim 1 on a plastic substrate, and carrying out photocuring treatment after drying.
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