CN111621229B - A kind of modified AF coating material and its preparation method and coating method - Google Patents

Abstract

The present invention relates to the technical field of glass production, more particularly, it relates to a modified AF coating material, a preparation method and a coating method thereof, and the modified AF coating material comprises the following components expressed in parts by weight: 69-100 parts of fluorosilicone resin; 19-32 parts of microwax powder; wherein, modified fluorosilicone resin is prepared by mixing and reacting the following components in parts by weight: 23-39 parts of fluorine-containing silane compound; orthosilicate 72-105 parts; FVT 40-88 parts; the coating method is to put the treated glass and the modified AF coating material into the spraying equipment for spraying and baking. The invention provides a modified AF coating material, wherein the AF film formed on the glass surface has a large adhesion degree to the glass, so as to achieve the effect that the AF film is not easy to fall off.

Description

A kind of modified AF coating material and its preparation method and coating method

technical field

The invention relates to the technical field of glass production, and more particularly, to a modified AF coating material, a preparation method thereof and a coating method thereof.

Background technique

The touch screen is an inductive liquid crystal display device that can receive input signals such as contacts. It is the most simple, convenient and natural human-computer interaction medium. It gives multimedia a new look and is very attractive. Brand new multimedia interactive equipment. Since the surface of the touch screen is often touched by fingers, the dirt on the finger, especially the oil dirt, is easy to adhere to the outer surface of the touch screen and leave fingerprints, which affects the visual effect.

In view of the above problems, in the glass processing and production applied to the touch screen, an AF coating process (AF is anti-fingerprint) is generally performed on the surface of the touch screen glass. Among them, the conventional AF coating process methods include spray coating, vacuum evaporation, vacuum sputtering, etc. In the coating process method of spray coating, a spray liquid made of AF coating material is used, and the AF coating material is made of The spraying liquid is sprayed on the glass surface by spraying equipment, and then cured to form an AF film on the glass surface. The AF coating material is plated on the glass surface and a layer of AF film is formed by the above method, so that the glass surface of the touch screen has anti-fingerprint performance. The above-mentioned AF film is a hydrophobic and oleophobic film layer, which is mainly an organic fluorine material. Since the organic fluorine material has excellent hydrophobic and oleophobic properties, after the AF film is formed on the surface of the touch screen glass, the surface of the touch screen glass is not easy to leave. Fingerprint performance.

However, because of the hydrophobicity and oleophobicity of the organic fluorine material, it is difficult to combine with the glass surface, so the AF film attached to the glass surface of the touch screen is often easy to fall off, and the touch screen surface is frequently touched. , not resistant to friction.

SUMMARY OF THE INVENTION

The first object of the present invention is to provide a modified AF coating material, the AF film formed on the glass surface has a large adhesion degree to the glass, so as to achieve the effect that the AF film is not easy to fall off.

The second object of the present invention is to provide a method for preparing a modified AF coating material, and the prepared modified AF coating material has good storage stability, so as to ensure that the modified AF coating material is not easy to fall off after being sprayed on the glass surface Effect.

The third object of the present invention is to provide a coating method for the modified AF coating material, which has the advantage of improving the adhesion between the AF film and the touch screen glass.

In order to achieve the above-mentioned first purpose, the present invention provides the following technical solutions: a modified AF coating material, the modified AF coating material comprises the following components expressed in parts by weight:

69-100 parts of modified fluorosilicone resin;

19-32 servings of microwax powder;

Wherein, the modified fluorosilicone resin is prepared by the mixing reaction of the components in the following parts by weight:

23-39 parts of fluorine-containing silane compounds;

72-105 parts of orthosilicate;

FVT (alkoxy modified fluorine-containing polysiloxane) 40-88 parts.

In a preferred example of the present invention, it can be further configured as: the modified AF coating material comprises the following components in parts by weight:

80 parts of modified fluorosilicone resin;

Micro-wax powder 20 servings.

By adopting the above technical solution, in the modified fluorosilicone resin, C ₂ H ₅ -SiO ₃ H (orthosilicate)+H ₂ O→C ₂ H ₅ OH+H ₂ SiO ₃ , H ₂ SiO ₃ =SiO ₂ +H ₂ O, orthosilicate is hydrolyzed step by step by sol-gel method to obtain SiO ₂ sol, and the condensation reaction of SiO 2 sol and FVT can produce fluorosilicone resin prepolymer with hydroxyl groups on the surface, and the prepolymer continues to Condensed with fluorine-containing silane compounds to obtain colorless and transparent modified fluorosilicone resin; the fluorosilicone resin prepolymer with hydroxyl groups on the surface can not only control the agglomeration of SiO ₂ particles, but also enable the grafting of fluorine-containing silane compounds to the surface of SiO ₂ particles, therefore, the prepared modified fluorosilicone resin has both an organic part and an inorganic rough part, wherein the organic part is a group with hydrophobic and oleophobic properties, and the inorganic rough part is a Si-OH group. When the modified AF coating material is sprayed on the glass surface and baked, because the Si-OH group has a stronger bonding force with the hydroxyl group on the glass, the Si-OH group is arranged and distributed on the glass surface, and finally chemically bonded to the glass. Combined with the method, the adhesion between the modified AF coating material and the glass surface is significantly improved.

The modified AF coating material of the present application is also mixed with microwax powder. The microwax powder has good dispersion compatibility in the liquid resin, has a certain viscosity, and the resin as a whole can be stored uniformly and stably for a long time. Since the micro-wax powder has the characteristics of scratch resistance, anti-blocking, abrasion resistance, and improved smooth hand feeling, therefore, adding the micro-wax powder to the modified AF coating material of the present application can enhance the overall performance of the modified AF coating material. Rigidity, in order to improve the friction resistance of the modified AF coating material, in addition, it can also give the modified AF coating material a smooth hand feel, which can greatly improve the user experience.

In a preferred example of the present invention, it can be further configured that: the particle size of the microwax powder is less than or equal to 5 μm.

By adopting the above technical solution, if the particle size of the microwax powder is too large, it will affect the isolation and hydrophobicity of the product, and even affect the combination of the modified fluorosilicone resin and the glass surface.

In a preferred example of the present invention, it can be further configured that: the fluorine-containing silane compound is POTS (perfluorooctyltrimethoxysilane).

By adopting the above technical solution, POTS is a silane compound containing a fluorine alkyl functional group, which has the advantages of high heat resistance, high chemical resistance stability, and low surface free energy.

In a preferred example of the present invention, it can be further configured as: the FVT is obtained by mixing and reacting the following components in parts by weight: the mass of FVSA (trifluoropropyl vinyl silicone oil) and TMS (trimethoxyhydrosilane) The ratio is (1.7-2.5):(0.7-1.4).

By adopting the above-mentioned technical scheme, FVSA and TMS obtain the above-mentioned FVT through hydrosilylation reaction.

For realizing the above-mentioned second purpose, the present invention provides the following technical solutions:

A preparation method of a modified AF coating material, comprising the following steps:

(1) Preparation of modified fluorosilicone resin: weigh 100-125 parts of alcohol solution, 72-105 parts of orthosilicate, 40-88 parts of FVT and 23-39 parts of POTS according to parts by weight, mix and react in steps , the solvent is distilled off under reduced pressure to obtain a modified fluorosilicone resin fluid;

(2) Preparation of modified AF coating material: Weigh 19-32 parts of microwax powder and add it to the modified fluorosilicone resin fluid obtained in step (1), stir evenly, dry and solidify, air-cool and cut into pellets to obtain Solid particles of modified AF coating material.

In a preferred example of the present invention, it can be further configured as: in step (1), the step-by-step mixing reaction is specifically: taking orthosilicate, distilled water and POTS as reactants, dividing the reactants into 3 parts on average, 2 parts of the reaction are added to the system, after the system is heated to 55-70 ° C, the pH is adjusted to 4-5 with hydrochloric acid, and after 2-3 hours of reaction, the remaining 1 part of the reactant is slowly added dropwise to the system, and co-hydrolysis and polycondensation are carried out. 6-7h.

By adopting the above technical solution, since C ₂ H ₅ -SiO ₃ H (orthosilicate)+H ₂ O→C ₂ H ₅ OH+H ₂ SiO ₃ , H ₂ SiO ₃ =SiO ₂ +H ₂ O, the positive Silicate is hydrolyzed step by step by sol-gel method to obtain SiO ₂ sol. At the same time, the condensation reaction of SiO ₂ sol and FVT can prepare fluorosilicone resin prepolymer with hydroxyl groups on the surface, and continue to condense with fluorine-containing silane compound, Colorless and transparent modified fluorosilicone resin can be obtained; the purpose of the step-by-step reaction is to hydrolyze the orthosilicate in the system step by step to obtain SiO ₂ sol, and at the same time, the condensation reaction of SiO ₂ sol and FVT can make the surface The fluorosilicone resin prepolymer with hydroxyl groups enables the prepolymer of fluorosilicone resin with hydroxyl groups on the surface to be fully grafted with POTS.

The microwax powder is directly added to the modified fluorosilicone resin fluid. Because the microwax powder has good dispersion compatibility in the liquid resin, the microwax powder can be uniformly dispersed in the modified fluorosilicone resin fluid under sufficient stirring.

In step (2), the modified fluorosilicone resin fluid prepared by the sol-gel method is dried and solidified, so as to obtain modified AF coating material particles with nanostructures. In addition, the modified AF coating material is first prepared into solid particles. Compared with the traditional fluid AF coating material, the solid modified AF coating material has the characteristics of long storage time, not easy to dry out, and good material stability, so it can be To ensure that the modified AF coating material is not easy to fail.

For realizing the above-mentioned third purpose, the present invention provides following technical scheme:

A coating method for modifying AF coating material, comprising the following steps:

(1) Pretreatment of glass coating: ultrasonic cleaning for 20-40min, drying;

(2) Glass feeding: install the glass on the spraying appliance, and then send it to the spraying room;

(3) Pretreatment of the modified AF coating material: adding the modified AF coating material to an organic solvent and preparing it into a spray solution;

(4) Spraying: spray the spraying liquid prepared from the modified AF coating material on the glass surface;

(5) Baking: Baking the glass.

In a preferred example of the present invention, it can be further configured as: in step (3), the specific preparation method of the spray liquid is as follows: take 4.5-6g solid particles of modified AF coating material, add 42-50g fluoroether solvent and 30g -35g mixed organic solvent of butyl acrylate, stirring for 20-30min, and ultrasonically dispersing for 30-35min to obtain a fluid-like modified AF coating material.

By adopting the above technical solution, the particles of the modified AF coating material stored in a solid state are dissolved with an organic solvent before spraying, so as to be suitable for the subsequent spraying step. The fluid-like modified AF coating material is sprayed onto the glass surface by spraying equipment, and after baking, an AF film can be formed on the glass surface.

The purpose of baking is to speed up the volatilization of the solvent, accelerate the reaction between resins, attach the resin to the glass surface to form nuclei and grow into a solid film, and finally form a continuous film through the contact and merger of adjacent stable nuclei, and cure the modification of the glass surface. AF coating material to dry the AF film

In a preferred example of the present invention, it can be further configured as follows: the baking temperature in step (5) is set at 120-180°C.

By adopting the above technical solution, the butyl acrylate solvent and the fluoroether solvent start to volatilize at 120°C, and the baking temperature is higher than 120°C to volatilize the butyl acrylate solvent and the fluoroether solvent, leaving a modification on the glass surface. The effective component of the AF coating material, and the baking temperature is controlled below 180 ° C, in order to prevent the effective component of the modified AF coating material from being decomposed and failing.

In a preferred example of the present invention, it can be further configured as follows: the baking temperature in step (5) is set at 140-150°C.

By adopting the above technical solution, the baking temperature is set in the range of 140-150 °C, which can ensure that the butyl acrylate solvent and the fluoroether solvent can be volatilized, and the effective components of the modified AF coating material will not be decomposed. And can improve the efficiency of baking and curing and the quality of the AF film.

To sum up, the present invention has the following beneficial effects:

First, in the formula of the modified AF coating material of the present invention, SiO ₂ inorganic matter is added on the basis of the fluorine-containing silane compound, so that the fluorine-containing silane compound can adhere more to the glass surface through the SiO ₂ structure to achieve the AF film. Not easy to fall off effect.

Second, in the preparation method of the modified AF coating material of the present invention, the modified AF coating material is prepared into solid particles, so that the modified AF coating material has the characteristics of long storage period and stable material, so as to ensure the modified AF coating layer. The effect that the material is not easy to fall off after spraying on the glass surface.

Third, in the coating method of the modified AF coating material of the present invention, the modified AF coating material is sprayed on the glass surface to form an AF film on the glass surface with strong adhesion to the glass surface and good wear resistance.

Detailed ways

The present invention will be described in further detail below in conjunction with the embodiments.

The reagents in the following embodiments and comparative examples of the present invention are preferably the following manufacturers. It should be noted that, under the technical enlightenment of the present invention, the following reagents produced by any manufacturer are selected by those skilled in the art, which all fall into the protection scope of the present invention. .

Ethyl orthosilicate was purchased from Tianjin Kemeiou Chemical Reagent Co., Ltd.; POTS was purchased from Hangzhou Anjiarui Technology Co., Ltd.; FVSA was purchased from Shenzhen Jingyi Glass Co., Ltd.; TMS was purchased from Shanghai Silicon Friends New Material Technology Co., Ltd. The vinyl-terminated fluorosilicone oil trifluoropropyl methylsiloxane produced by the company; the microwax powder was purchased from Shanghai Kaiyin Chemical Co., Ltd.

The following alcohol solution can be one or more of methanol solution, ethanol solution, isobutanol and isoamyl alcohol, and the alcohol solution in this application is preferably an ethanol solution. The following orthosilicate can be methyl orthosilicate or ethyl orthosilicate, and the orthosilicate in this application is preferably ethyl orthosilicate.

In all the following application examples and comparative application examples, the glass used is from the same production batch.

Example

Example 1:

A modified AF coating material is prepared by mixing modified fluorosilicone resin and microwax powder,

Among them, FVT is prepared first, which is used for the preparation of modified fluorosilicone resin.

The preparation method of FVT is as follows: add FVSA and TMS with m(FVSA):m(TMS)=2:1 into the flask, after the system is heated to 83°C, add the catalyst chloroplatinic acid, and react for 2h to obtain a transparent viscous liquid.

(1) Preparation of modified fluorosilicone resin: weigh 300 parts of distilled water, 100 parts of ethanol solution, 72 parts of ethyl orthosilicate, 40 parts of FVT and 23 parts of POTS according to parts by weight. and POTS as reactants, divide the reactants into 3 parts on average, first add 2 parts of the reactants to the system, after the system is heated to 60°C, adjust pH=4 with hydrochloric acid (mass fraction is 37%), and react for 2h after , the remaining 1 part of the reactant was slowly added dropwise to the system, co-hydrolyzed and polycondensed for 6 h, and the solvent was distilled off under reduced pressure to obtain a modified fluorosilicone resin fluid.

(2) Weigh 20 parts of microwax powder into 80 parts of modified fluorosilicone resin fluid, stir evenly, dry and solidify, air-cooled and diced to obtain solid modified AF coating material particles.

Table 1 Composition ratio of modified AF coating material in Examples 1-5

Component addition amount Modified fluorosilicone resin Micro wax powder Example 1 80 20 Example 2 80 19 Example 3 80 25 Example 4 80 28 Example 5 80 32

Examples 2-5:

A modified AF coating material is different from Example 1 in that the amount of microwax powder is different, as shown in Table 1 for details, and the rest are the same as in Example 1.

Examples 6-11:

A modified AF coating material, the difference from Example 1 is that the amount of components of the modified fluorosilicone resin is different, as shown in Table 2, and the rest are the same as in Example 1.

Table 2 Composition ratio of modified fluorosilicone resin in modified AF coating material in Examples 6-11

Example 12:

A modified AF coating material, the difference from Example 1 is that the fluorine-containing silane compound is FOTS (perfluorooctyl trichlorosilane), and the FOTS is FOTS produced by Shanghai Mengya Biotechnology Co., Ltd.

Example 13:

A modified AF coating material, the difference from Example 2 is that the fluorine-containing silane compound is selected from FOTS, and the FOTS is selected from FOTS produced by Shanghai Sprout Biotechnology Co., Ltd.

Application example 1:

A coating method for modifying AF coating material, comprising the following steps:

(1) Pretreatment of glass coating: ultrasonic cleaning for 30min and drying.

(2) Installation of glass: send it to the spray booth.

(3) pretreatment of modified AF coating material: the modified AF coating material particles obtained in Example 1 are added to an organic solvent and formulated into a spraying liquid; wherein, the specific preparation method of the spraying liquid is: take 4.5g of solid modified AF coating material particles, add 42 g of a fluoroether solvent and a mixed organic solvent of 30 g of butyl acrylate, stir for 20 min, and ultrasonically disperse for 30 min.

(4) Spraying: spray the spraying liquid in step (3) on the glass surface, and the thickness of spraying is 0.1 mm.

(5) Baking: Bake the glass, and the baking temperature is 145°C.

Application example 2:

A modified AF coating material is different from Application Example 1 in that the modified AF coating material is prepared in Example 2.

Application example 3:

A modified AF coating material is different from Application Example 1 in that the modified AF coating material is prepared in Example 3.

Application example 4:

A modified AF coating material is different from Application Example 1 in that the modified AF coating material is prepared in Example 4.

Application example 5:

A modified AF coating material is different from Application Example 1 in that the modified AF coating material is prepared by using Example 5.

Application example 6:

A modified AF coating material is different from Application Example 1 in that the modified AF coating material is prepared in Example 6.

Application example 7:

A modified AF coating material is different from Application Example 1 in that the modified AF coating material is prepared by using Example 7.

Application example 8:

A modified AF coating material is different from Application Example 1 in that the modified AF coating material is prepared by using Example 8.

Application example 9:

A modified AF coating material is different from Application Example 1 in that the modified AF coating material is prepared by using Example 9.

Application example 10:

A modified AF coating material is different from Application Example 1 in that the modified AF coating material is prepared by using Example 10.

Application example 11:

A modified AF coating material is different from Application Example 1 in that the modified AF coating material is prepared by using Example 11.

Application example 12:

A modified AF coating material is different from Application Example 1 in that the modified AF coating material is prepared by using Example 12.

Application example 13:

A modified AF coating material, the difference from Application Example 1 is that the modified AF coating material is prepared by using Example 13.

Application example 14:

A coating method for modifying AF coating material, comprising the following steps:

(1) pretreatment of modified AF coating material: after placing the modified AF coating material particles obtained in Example 1 for 3 months, add it to an organic solvent and be mixed with a spraying liquid, wherein, the specific preparation method of the spraying liquid is: Take 4.5 g of solid modified AF coating material particles, add 42 g of a fluoroether solvent and a mixed organic solvent of 30 g of butyl acrylate, stir for 20 min, and ultrasonically disperse for 30 min.

(2) Pretreatment of glass coating: ultrasonic cleaning for 30min, drying.

(3) Installation of glass: send it to the spray booth.

(4) Spraying: spray the spraying liquid in step (1) on the surface of the glass, and the thickness of the spraying is 0.1 mm.

(5) Baking: Bake the glass, and the baking temperature is 145°C.

Application example 15-17:

A modified AF coating material differs from Application Example 1 in that the baking temperature in step (5) is different, as shown in Table 3 for details, and the rest are the same as in Application Example 1.

Table 3 Baking temperature setting value of step (5) in application example 15-17

Baking temperature/℃ Application example 15 148 Application example 16 130 Application example 17 160

Application example 18:

A coating method for modifying AF coating material, comprising the following steps:

(1) Pretreatment of glass coating: ultrasonic cleaning for 30min and drying.

(2) Glass feeding: install the glass on the spraying equipment, and then send it to the spraying room.

(3) pretreatment of modified AF coating material: the modified AF coating material obtained in Example 1 is added to an organic solvent and formulated into a spraying liquid; wherein, the specific preparation method of the spraying liquid is: take 6g of solid modified AF To the coating material particles, add a mixed organic solvent of 50 g of fluoroether solvent and 35 g of butyl acrylate, stir for 30 minutes, and ultrasonically disperse for 35 minutes.

(4) Spraying: spray the spraying liquid in step (3) on the glass surface, and the thickness of spraying is 0.1 mm.

(5) Baking: Bake the glass, and the baking temperature is 145°C.

Comparative Example Comparative Example 1:

A modified AF coating material, the difference from Example 1 is that no microwax powder is added.

Comparative Example 2:

A modified AF coating material, the difference from Example 1 is that 10 parts of microwax powder are added.

Comparative Example 3:

A modified AF coating material, the difference from Example 1 is that the modified AF coating material is prepared by mixing fluorosilicone resin and microwax powder, wherein the fluorosilicone resin is not modified, and Hangzhou Anjiarui Technology is directly selected. Co., Ltd. produces POTS.

20 parts of microwax powder were weighed and added to 80 parts of the above POTS, stirred evenly, dried and solidified, and air-cooled and diced to obtain solid modified AF coating material particles.

Comparative Example 4:

A modified AF coating material is prepared by mixing modified fluorosilicone resin and microwax powder, wherein FVT is prepared separately firstly for the preparation of modified fluorosilicone resin.

The preparation method of FVT is as follows: add FVSA and TMS with m(FVSA):m(TMS)=2:1 into the flask, after the system is heated to 83°C, add the catalyst chloroplatinic acid, and react for 2h to obtain a transparent viscous liquid.

(1) Preparation of modified fluorosilicone resin: According to parts by weight, weigh 300 parts of distilled water, 100 parts of ethanol solution, 72 parts of ethyl orthosilicate, 40 parts of FVT and 23 parts of POTS, and add the above-mentioned reactants at one time to In the system, when the temperature of the system was raised to 60°C, the pH was adjusted to 4 with hydrochloric acid (37% by mass). After 2 hours of reaction, the remaining 1 part of the reactant was slowly added dropwise to the system, co-hydrolyzed and polycondensed for 6 hours, and distilled under reduced pressure. The solvent is removed to obtain a modified fluorosilicone fluid.

(2) Weigh 20 parts of microwax powder into 80 parts of modified fluorosilicone resin fluid, stir evenly, dry and solidify, air-cooled and diced to obtain solid modified AF coating material particles.

Comparative Example 5:

A modified AF coating material is prepared by mixing modified fluorosilicone resin and microwax powder, wherein FVT is prepared separately firstly for the preparation of modified fluorosilicone resin.

The preparation method of FVT is as follows: add FVSA and TMS with m(FVSA):m(TMS)=2:1 into the flask, after the system is heated to 83°C, add the catalyst chloroplatinic acid, and react for 2h to obtain a transparent viscous liquid.

(1) Preparation of modified fluorosilicone resin: weigh 300 parts of distilled water, 100 parts of ethanol solution, 72 parts of ethyl orthosilicate, 40 parts of FVT and 23 parts of POTS according to parts by weight. and POTS as reactants, divide the reactants into 3 parts on average, first add 2 parts of the reactants to the system, after the system is heated to 60°C, adjust pH=4 with hydrochloric acid (mass fraction is 37%), and react for 2h after , the remaining 1 part of the reactant was slowly added dropwise to the system, co-hydrolyzed and polycondensed for 6 h, and the solvent was distilled off under reduced pressure to obtain a modified fluorosilicone resin fluid.

(2) adding the modified fluorosilicone resin fluid obtained in step (1) into a fluoroether solvent, and ultrasonically dispersing to obtain a fluid-like modified AF coating material.

Comparative application example 1:

A coating method for modifying AF coating material, comprising the following steps:

(1) Pretreatment of glass coating: ultrasonic cleaning for 30min and drying.

(2) Installation of glass: send it to the spray booth.

(3) Pretreatment of modified AF coating material: The modified AF coating material prepared in Comparative Example 1 was added to an organic solvent and prepared into a spray solution.

(4) Spraying: spray the spraying liquid in step (3) on the glass surface, and the thickness of spraying is 0.1 mm.

(5) Baking: Bake the glass, and the baking temperature is 145°C.

Comparative application example 2:

A coating method of a modified AF coating material is different from the comparative application example 1 in that the modified AF coating material is prepared by using the comparative example 2.

Comparative application example 3:

A coating method of a modified AF coating material is different from the comparative application example 1 in that the modified AF coating material is prepared by the comparative example 3.

Comparative application example 4:

A coating method for a modified AF coating material is different from the comparative application example 1 in that the modified AF coating material is prepared by using the comparative example 4.

Comparative application example 5:

A coating method for modifying AF coating material, comprising the following steps:

(1) Pretreatment of glass coating: ultrasonic cleaning for 30min and drying.

(2) Installation of glass: send it to the spray booth.

(3) Spraying: The fluid-like modified AF coating material prepared in Comparative Example 5 was sprayed on the glass surface, and the thickness of the spraying was 0.1 mm.

(4) Baking: Bake the glass, and the baking temperature is 145°C.

Comparative application example 6:

A coating method for modifying AF coating material, comprising the following steps:

(1) Pretreatment of modified AF coating material: The fluid-like modified AF coating material prepared in Comparative Example 5 was placed for 3 months.

(2) Pretreatment of glass coating: ultrasonic cleaning for 30min, drying.

(3) Installation of glass: send it to the spray booth.

(4) Spraying: The fluid-like modified AF coating material in step (1) was sprayed on the glass surface with a thickness of 0.1 mm.

(5) Baking: Bake the glass, and the baking temperature is 145°C.

Comparative application example 7:

A coating method for modifying AF coating material, comprising the following steps:

(1) Pretreatment of glass coating: ultrasonic cleaning for 30min and drying.

(2) Installation of glass: send it to the spray booth.

(3) Pretreatment of modified AF coating material: The modified AF coating material prepared in Example 1 was added to an organic solvent and prepared into a spray solution.

(4) Spraying: spray the spraying liquid in step (3) on the glass surface, and the thickness of spraying is 0.1 mm.

(5) Baking: Bake the glass, and the baking temperature is 100°C.

Comparative application example 8:

A coating method for modifying AF coating material, comprising the following steps:

(1) Pretreatment of glass coating: ultrasonic cleaning for 30min and drying.

(2) Installation of glass: send it to the spray booth.

(3) Pretreatment of modified AF coating material: The modified AF coating material prepared in Example 1 was added to an organic solvent and prepared into a spray solution.

(4) Spraying: spray the spraying liquid in step (3) on the glass surface, and the thickness of spraying is 0.1 mm.

(5) Baking: Bake the glass, and the baking temperature is 220°C.

Performance testing

The hydrophobicity and oleophobicity of the AF film is expressed by the drop angle of distilled water on the glass surface; the hardness of the AF film is expressed by the scratches of the Mitsubishi 7H pencil on the glass surface according to the GB/T6739-1996 standard; the friction resistance of the AF film It is expressed by the water drop angle after steel wool is rubbed on the glass surface for 3000 times; the smoothness of the AF film is expressed by the wiping coefficient of BEMCOT dust-free cloth to wipe the glass surface; The water drop angle after the cloth wraps the glass for 48 hours.

Detection method:

(1) Detection method of initial water drop angle test: use a water drop angle tester (SDC200), use distilled water as a probe to drop the liquid on the glass surface, the water drop size is 5 μL, and the water drop angle ≥ 110° is a qualified product.

(2) Detection method of pencil hardness test: Using a pencil hardness tester, under the conditions of 1kg pressure, 5mm/s speed, and 40mm stroke, use a Mitsubishi brand 7H pencil to scratch the glass surface, and no scratches on the glass surface are qualified products.

(3) Detection method of friction resistance test: use a friction tester, take a contact area of 10*10mm, under the conditions of a pressure of 1kg, a friction speed of 60 times/min, and a friction stroke of 40mm, use steel wool on the glass surface After rubbing for 3000 times, the test method of the initial water drop angle test is used to test the water drop angle. The water drop angle ≥ 105° is a qualified product.

(3) Detection method of dynamic friction coefficient: use a dynamic friction tester, use a BEMCOT dust-free cloth with an area of 10*10mm to wipe the glass surface under the conditions of a load of 100g and a wiping speed of 500mm/min. The wiping coefficient <0.04 is Qualified product.

(4) Detection method of artificial sweat resistance test: use an environmental test box, under the conditions of temperature of 45 ℃ and humidity of 45%, wrap the glass with a dust-free cloth soaked in artificial sweat, place it for 48 hours, clean it, and then use the initial The detection method of the water drop angle test The water drop angle test is carried out, and the water drop angle ≥ 100° is a qualified product.

The test results are shown in the following table:

It can be seen from the above table that the modified AF coating material prepared by each application example of the present application, the AF film formed by spraying it on the glass surface, has excellent performance in hydrophobic and oleophobic properties, friction resistance, smoothness and sweat resistance, etc. It shows good effects in all aspects. It can be seen that the AF film formed on the glass surface of the modified AF coating material prepared in each application example of the present application can well adhere to the glass surface.

In Examples 1-5, microwax powder was added to the modified fluorosilicone resin, and the microwax powder was used to have the characteristics of scratch resistance, anti-adhesion, abrasion resistance, and improved smooth hand feeling to enhance the overall modification of the modified AF coating material. In order to improve the friction resistance of the modified AF coating material, it can be seen from the data of application examples 1-5 and comparative application examples 1-2 that adding microwax powder to the modified fluorosilicone resin has no effect on the modification. The overall hydrophobic and oleophobic properties of the AF coating material are excellent, and it has excellent performance in the dynamic friction coefficient test performance and friction resistance performance, that is, the obtained AF film can be better combined with glass, without adding microwax powder. In the pencil hardness test and the dynamic friction coefficient test, its performance has decreased, which proves that the corresponding AF film has insufficient smoothness.

In Example 6-11, the dosage of each component used to prepare the modified fluorosilicone resin was changed. According to the test results of Application Example 6-11 and the test results of Application Example 1, it can be seen that its initial water drop angle test, pencil hardness test, In all test items of friction resistance test, dynamic friction coefficient and artificial sweat resistance test, there is little difference with the test results of Example 1.

In Examples 12-13, POTS, which has the advantages of high heat resistance, high chemical resistance and low surface free energy in the modified fluorosilicone resin, was replaced with FOTS. Except for the pencil hardness test and the dynamic friction coefficient test, other properties were the same. There is a certain reduction, especially the test results of the initial water drop angle are quite different from those of the previous application examples, which proves that POTS has excellent heat resistance, chemical resistance and stability in the reaction of preparing modified fluorosilicone resin. These aspects of hydrophobicity and oleophobicity are more outstanding than FOTS, that is, using POTS, a fluorine-containing silane compound, to prepare modified AF coating materials, AF films with better adhesion to glass surface can be obtained.

According to the data of Application Example 3 and Application Example 1 of Comparative Example, POTS was directly selected for the fluorosilicone resin in Comparative Example 3, and POTS was not modified with SiO ₂ . The performance of artificial sweat test is poor, that is, the AF film prepared by modifying POTS with SiO ₂ can improve its hydrophobicity and oleophobicity, friction resistance and chemical stability.

According to the test results of Application Example 1 and Application Example 14, the prepared solid-state modified AF coating material particles were sprayed on glass for AF coating after a storage time of 3 months, and the obtained glass was in There is little difference in various properties; combined with the test results of Comparative Application Examples 5-6, it can be seen that the freshly prepared fluid-like AF coating material was sprayed on the glass, and the obtained glass was in various detection properties and Application Example 1. The performance is not much different, but after the fluid-like AF coating material is placed for 3 months, it is sprayed on the glass to coat the AF film. The AF coating material particles are better than the fluid-like modified AF coating material in long-term storage.

According to the test results of application examples 15-17 and comparative application examples 7-8, it can be seen that the baking temperature is too high or too low, which will have a certain impact on the performance of the modified AF coating material. Among them, the pencil hardness test and dynamic friction coefficient These two tests had no effect, i.e. the AF film remained the same for both stiffness and smoothness, but for the initial water drop angle test, rub resistance test and artificial sweat resistance test, its performance was greatly reduced, i.e. AF film It has poor performance in terms of hydrophobicity and oleophobicity, friction resistance and chemical stability.

This specific embodiment is only an explanation of the present invention, and it does not limit the present invention. Those skilled in the art can make modifications without creative contribution to the present embodiment as needed after reading this specification, but as long as the rights of the present invention are used All claims are protected by patent law.

Claims (5)

1. a modified AF coating material, it is characterized in that, described modified AF coating material comprises following and represents each component by weight: 69-100 parts of modified fluorosilicone resin; 19-32 servings of microwax powder; Wherein, the modified fluorosilicone resin is prepared by the mixing reaction of the components in the following parts by weight: 23-39 parts of fluorine-containing silane compounds; 72-105 parts of orthosilicate; FVT 40-88 copies; The fluorine-containing silane compound is POTS; The FVT is obtained by mixing and reacting the following components in parts by weight: the mass ratio of FVSA and TMS is (1.7-2.5): (0.7-1.4); The preparation of the modified AF coating material comprises the following steps: (1) Modified fluorosilicone resin: weigh 100-125 parts of alcohol solution, 250-360 parts of distilled water, 72-105 parts of orthosilicate, 40-88 parts of FVT and 23-39 parts of POTS according to parts by weight, The mixed reaction is carried out in steps, and the solvent is distilled off under reduced pressure to obtain a modified fluorosilicone resin fluid; (2) Weigh 19-32 parts of microwax powder into the modified fluorosilicone resin fluid prepared in step (1), stir evenly, dry and solidify, air-cool and cut into pellets to obtain solid modified AF coating material particles ; In step (1), the step-by-step mixing reaction is specifically as follows: using orthosilicate, distilled water and POTS as reactants, dividing the reactants into 3 parts on average, first adding 2 parts of the reactants to the system, and waiting for the system to heat up to 55-70 ℃, adjust pH=4-5 with hydrochloric acid, after 2-3 hours of reaction, slowly drop the remaining 1 part of the reactant into the system for co-hydrolysis and polycondensation for 6-7 hours. 2. a kind of modified AF coating material according to claim 1, is characterized in that, described modified AF coating material comprises the following by weight part to represent each component: 80 parts of modified fluorosilicone resin; Micro-wax powder 20 servings. 3. utilize the coating method of a kind of modified AF coating material described in claim 1 or 2, is characterized in that, comprises the following steps: (1) Pretreatment of glass coating: ultrasonic cleaning for 20-40min, drying; (2) Installation of glass: send it to the spray booth; (3) Pretreatment of the modified AF coating material: adding the modified AF coating material to an organic solvent and preparing it into a spray solution; (4) Spraying: spray the spraying liquid prepared from the modified AF coating material on the glass surface; (5) Baking: Bake the glass. 4 . The coating method of the modified AF coating material according to claim 3 , wherein the baking temperature in step (5) is set at 120-180° C. 5 . 5 . The coating method of the modified AF coating material according to claim 3 , wherein the baking temperature in step (5) is set at 140-150° C. 6 .