A composition for a hydrophobic layer, an article having a hydrophobic layer, and a method of making

Abstract

The application provides a hydrophobic layer composition, an article with a hydrophobic layer and a preparation method. A synergistic effect of a fluorine-containing resin system and a fluorine-containing non-ionic surfactant is adopted, harsh conditions such as high temperature and high pressure are not needed, the curing process is simple and fast, and spraying can be completed at room temperature. The formed coating has good hydrophobicity and strong durability. The material has strong hydrophobicity and good visible light transmittance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of coating materials, in particular to a hydrophobic layer composition, an article with a hydrophobic layer and a preparation method. BACKGROUND

[0002] In many object surfaces, such as glass building surfaces, camera lens surfaces, solar panel surfaces, etc., dust accumulation is prone to occur in outdoor environments, making cleaning costly and maintenance difficult. In order to improve this problem, a transparent hydrophobic layer can be introduced on the surface of the material. The self-cleaning properties of the hydrophobic material itself can greatly reduce the cleaning cost and maintenance difficulty.

[0003] In recent years, researchers have conducted a large number of studies on hydrophobic layer materials. Surface hydrophobic technology derived from the biomimetic phenomenon of lotus leaves has become one of the research hotspots by reducing the surface free energy of the material to improve the hydrophobicity and self-cleaning performance of the material. Although existing surface hydrophobic technology can achieve certain waterproof and hydrophobic performance, it usually needs to add nanomaterials to improve the microstructure, which is high in cost and greatly reduces the light transmittance of the material, and is not suitable for surfaces with high light transmittance requirements such as lenses and buildings; some surface hydrophobic technologies need to use various complex polymerization reactions, such as sol-gel method, etc., which have complex process conditions and are difficult to use in large-area construction conditions. Therefore, it is still necessary to develop a hydrophobic layer material with simple process, good hydrophobicity and good light transmittance. SUMMARY

[0004] The present application utilizes fluorocarbon resin introduced into the resin coating to make the coating obtain the hydrophobic property of fluorine element and ensure the transparency of the coating.

[0005] The present application provides a hydrophobic layer composition, which comprises a first component and a second component, in terms of parts by weight,

[0006] The first component comprises: 10-30 parts of a film forming agent, 10-50 parts of a first resin, 0.1-1 part of an ultraviolet absorber, and 20-80 parts of a first organic solvent.

[0007] The second component comprises: 10-50 parts of a non-ionic fluorine-containing surfactant, 5-20 parts of a second organic silicon resin, 0.1-0.5 parts of an antioxidant, and 30-90 parts of a second organic solvent.

[0008] The first resin comprises fluorocarbon resin.

[0009] In some embodiments, the first resin comprises a combination of chlorovinyl resin, first organic silicon resin and fluorocarbon resin, and the mass ratio of the chlorovinyl resin, first organic silicon resin and fluorocarbon resin is (0.5-5):(1-5):1.

[0010] In some embodiments, the first and second organic solvents are independently selected from at least one of 2-methylpentanal, ethyl acetate, m-xylene, ethylbenzene, t-butyl acetate, N-methylpyrrolidone;

[0011] In some embodiments, the film forming agent is selected from at least one of hydrogenated styrene-butadiene block copolymer or cellulose acetate; and / or the ultraviolet absorber is selected from at least one of bis-2,2,6,6-tetramethylpiperidinooxy sebacate, 2-(2H-benzotriazol-2-yl)-4,6-di-tert-amylphenol; and / or the antioxidant is selected from pentaerythrityl tetra-(β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate.

[0012] In some embodiments, the non-ionic fluorosurfactant is selected from Zonyl FSN 100 non-ionic surfactant; and / or the first and second components are independently formulated.

[0013] In some embodiments, the fluorocarbon resin is selected from solvent-based fluorocarbon resin;

[0014] The first and second silicone resins are independently selected from amino-containing polysiloxane.

[0015] The present application also provides an article comprising a carrier and a hydrophobic layer, the hydrophobic layer being prepared from a hydrophobic layer composition as described above; the hydrophobic layer comprising a first hydrophobic layer and a second hydrophobic layer;

[0016] The first hydrophobic layer is disposed on the surface of the carrier; the second hydrophobic layer is disposed on the side of the first hydrophobic layer facing away from the surface of the carrier; the first hydrophobic layer is prepared from the first component, and the second hydrophobic layer is prepared from the second component.

[0017] In some embodiments, the carrier is at least one of a glass surface, a metal surface, a resin surface, or a wooden surface.

[0018] The present application also provides a method for preparing an article comprising a hydrophobic layer, comprising the steps of:

[0019] providing a clean surface of a carrier;

[0020] formulating a first component, disposing a mixture of the first component on the clean surface of the carrier, and curing to form a first hydrophobic layer; and

[0021] formulating a second component, disposing a mixture of the second component on the surface of the first hydrophobic layer, and curing to form a second hydrophobic layer, thereby preparing the article.

[0022] In some embodiments, the preparation of the first component comprises mixing the film-forming agent, the first resin of the first component and the first organic solvent, stirring at room temperature for 2 hours or more, then adding the ultraviolet absorber, and continuing to stir for 30-60 minutes.

[0023] The preparation of the second component comprises mixing all raw materials of the second component, and stirring at room temperature for 30-60 minutes.

[0024] The curing condition of the first hydrophobic layer is curing at a temperature of -30℃ to 150℃ for 30-60 minutes; and / or

[0025] The curing condition of the second hydrophobic layer is curing at a temperature of -30℃ to 150℃ for 10-60 minutes.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] The hydrophobic material provided in the present application has simple components, and uses the synergistic effect of fluorine-containing resin system and fluorine-containing non-ionic surfactant, without the need for harsh conditions such as high temperature and high pressure. The curing process is simple and fast, and can be completed by spraying at room temperature (working temperature -30℃ to 150℃, the highest effective temperature can reach 260℃). The formed coating has good hydrophobicity and strong durability. The contact angle can reach 154.4°, the hydrophobicity reaches the super-hydrophobic standard, has multiple properties such as moisture-proof, anti-icing and corrosion resistance, and is suitable for outdoor application environment. Moreover, the material has good visible light transmittance, and can be widely used in optical lenses, building curtain walls and other scenes with high light transmittance requirements. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The figure is the static contact angle test result of the coating material of Example 1, and the contact angle of the coating is 154.4°.

[0029] Figure 2 The figure is the SEM photo of Example 1.

[0030] Figure 3 The figure is a structural schematic diagram of the hydrophobic layer arranged on a glass substrate. DETAILED DESCRIPTION

[0031] The present application will be further described in detail below in combination with embodiments and examples. It should be understood that these embodiments and examples are only used to illustrate the present application and not to limit the scope of the present application, and the purpose of providing these embodiments and examples is to make the disclosure of the present application more thorough and comprehensive.

[0032] The present application provides a hydrophobic layer composition, which comprises a first component and a second component, and the weight ratio of the first component to the second component is 1:1 to 1:10.

[0033] The first component comprises: 10-30 parts of film forming agent, 10-50 parts of first resin, 0.1-1 part of ultraviolet absorber, 20-80 parts of first organic solvent;

[0034] The second component comprises: 10-50 parts of non-ionic fluorine-containing surfactant, 5-20 parts of second silicone resin, 0.1-0.5 parts of antioxidant, 30-90 parts of second organic solvent;

[0035] The first resin comprises fluorocarbon resin. The composition can form a hydrophobic layer with good compatibility and good hydrophobicity through the joint action of fluorocarbon resin and non-ionic fluorine-containing surfactant. It can be used for anti-fouling and water discharge surface treatment of various products. Moreover, the coating of the composition has good visible light transmittance, and is especially suitable for surface treatment of building surfaces and various optical lenses.

[0036] To facilitate the formation of a hydrophobic layer with better performance and ensure good light transmittance, the first component and the second component are independently configured. In some embodiments, the two are independently configured and stored, and are independently prepared during use and applied to the surface of the carrier in a predetermined order to form a hydrophobic layer as shown in Figure 1 .

[0037] In some embodiments, the first resin comprises a combination of chlorovinyl resin, first silicone resin and fluorocarbon resin, and the mass ratio of the chlorovinyl resin, the first silicone resin and the fluorocarbon resin is (0.5-5):(1-5):1.

[0038] In this application, non-ionic fluorine-containing surfactant and fluorocarbon resin are important. The inventors have unexpectedly found that the addition of other types of surfactants, such as non-ionic surfactants without fluorine or ionic surfactants with fluorine, cannot produce the expected effect. This may be due to the synergistic effect between the non-ionic fluorine-containing surfactant and the fluorocarbon resin. In some embodiments, the non-ionic fluorine-containing surfactant is selected from Zonyl FSN 100 non-ionic surfactant.

[0039] In some embodiments, the fluorocarbon resin can be selected from any known solvent type fluorocarbon resin, for example, it can be a two-component solvent type fluorocarbon resin. Commercially available fluorocarbon resins include CX-803 two-component solvent type fluorocarbon resin from Shanghai Deruode Company.

[0040] The first and second silicone resins can be the same or different species, each independently selected from at least one of N-vinylbenzyl-N-(aminoethyl)-3-aminopropyl polysiloxane (Dynasylan 1175), N-benzyl-N-aminoethyl-3-aminopropyl trimethoxysilane (Dynasylan 1161), N-vinylbenzyl-N-(2-aminoethyl)-3-aminopropyl polysiloxane (Dynasylan 1172), N-vinylbenzyl-N-(aminoethyl)-3-aminopropyl polysiloxane (Dynasylan 1175), aminopropyl trimethoxysilane (Dynasylan AMMO; Silquest A-1110), aminopropyl triethoxysilane (Dynasylan AMEO).

[0041] The chlorovinyl acetate resin is a copolymer of chlorovinyl and vinyl acetate (VC-VAc) obtained by copolymerization of chlorovinyl monomer and vinyl acetate under the action of an initiator. The chlorovinyl acetate resin can be selected from binary chlorovinyl acetate resin, ternary chlorovinyl acetate resin or multi-chlorovinyl acetate resin. In some embodiments, the average polymerization degree of the chlorovinyl acetate resin is 350-450, and the vinyl acetate content is 15%-20%. If the polymerization degree is higher, it can cause the viscosity of the first component to be too large, increasing the difficulty of spraying.

[0042] The first and second organic solvents are each independently selected from at least one of 2-methylpentanal, ethyl acetate, m-xylene, ethylbenzene, tert-butyl acetate, N-methylpyrrolidone. The first and second organic solvents can be the same or different.

[0043] The film-forming agent is selected from hydrogenated styrene-butadiene block copolymer or cellulose acetate. In some embodiments, the film-forming agent is hydrogenated styrene-butadiene block copolymer and cellulose acetate in a mass ratio of (0.7-1.5):1, which can better enhance the performance of the film and shorten the curing time. The molecular weight of the hydrogenated styrene-butadiene block copolymer and cellulose acetate is not particularly limited in the present application. In order to achieve suitable good spraying performance, the number average molecular weight of the cellulose acetate can be in the range of 15000-60000 Da,

[0044] The species of the ultraviolet absorber and the antioxidant are not particularly limited, which can achieve the absorption of ultraviolet rays and improve the performance of the film. In some embodiments, the ultraviolet absorber is selected from at least one of bis-2,2,6,6-tetramethylpiperidinyl octylate, 2-(2H-benzotriazole-2-yl)-4,6-di-tert-pentylphenol; the antioxidant is selected from tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester.

[0045] The embodiments of the present application also provide an article, comprising a carrier and a hydrophobic layer, the hydrophobic layer being prepared from the aforementioned hydrophobic layer composition; the hydrophobic layer comprises a first hydrophobic layer and a second hydrophobic layer, as shown in Figure 3 The first hydrophobic layer is an intermediate connecting layer connecting the glass substrate (carrier) and the surface hydrophobic layer (second hydrophobic layer);

[0046] The first hydrophobic layer is disposed on the surface of the carrier; the second hydrophobic layer is disposed on the side of the first hydrophobic layer away from the surface of the carrier; the raw material of the first hydrophobic layer comprises a first component, and the raw material of the second hydrophobic layer comprises a second component. It can be understood that the first hydrophobic layer is prepared on the carrier first, and then the second hydrophobic layer is prepared.

[0047] The carrier can be any object surface that needs to be treated for water and stain resistance. In some embodiments, it is at least one of a glass surface, a metal surface, a resin surface, or a wooden surface. Since the hydrophobic material of the present application has good water and stain resistance, low surface free energy, and is not easy to get dirty, it has good light transmittance, and it is especially suitable for various optical lenses, such as glass or resin optical lenses.

[0048] The embodiments of the present application also provide a method for preparing the aforementioned article, which mainly forms a layer with hydrophobic effect on the surface of the article. The method comprises the following steps:

[0049] S1. providing a clean surface of a carrier;

[0050] S2. preparing a first component, spraying a mixture of the first component on the clean surface of the carrier, and curing to form a first hydrophobic layer; and

[0051] S3. preparing a second component, spraying a mixture of the second component on the surface of the first hydrophobic layer, and curing to form a second hydrophobic layer, thereby obtaining the article.

[0052] In some embodiments, preparing the first component comprises mixing the film-forming agent, the first resin, and the first organic solvent of the first component, stirring at room temperature for more than 2 hours, then adding the ultraviolet absorber, and continuing to stir for 30-60 minutes.

[0053] In some embodiments, preparing the second component comprises mixing all the raw materials of the second component, and stirring at room temperature for 30-60 minutes.

[0054] In some embodiments, the curing conditions of the first hydrophobic layer are curing at a temperature of -30℃ to 150℃ for 30-60 minutes, for example, the curing temperature can be 20-100℃, 25-85℃, 23-60℃, for example, it can be cured at room temperature.

[0055] In some embodiments, the curing condition of the second hydrophobic layer is curing at a temperature of -30°C to 150°C for 10 to 60 minutes, for example, the curing temperature can be 20-100°C, 25-85°C, 23-60°C, for example, it can be cured at room temperature.

[0056] In other embodiments, the film can also be formed on the surface of the carrier by means such as casting, brushing, etc.

[0057] The application will be further described below in conjunction with the drawings and examples. In the following specific examples, the amount of the raw material components is measured, and if not specifically stated, there can be slight deviations within the range of weighing accuracy. As for the temperature and time parameters, acceptable deviations caused by the accuracy of the instrument or the accuracy of the operation are allowed. If not specifically stated, the reagents and instruments used are known in the art or commercially available.

[0058] In the examples and comparative examples, the contact angle was measured using a contact angle measuring instrument (DSA10 MK2 G140 manufactured by KRUSS, Germany).

[0059] The transmittance of visible light was measured using a visible-ultraviolet spectrophotometer (U-4100 manufactured by Hitachi High-Technologies Corporation). The specific measurement method was as follows:

[0060] An alkali-free glass was used as the carrier, and a hydrophobic layer was provided on the surface thereof to obtain a sample with a coating layer on an alkali-free glass plate. Using this sample, the transmittance spectrum of the evaluation sample was measured using a U-4100 spectrophotometer. The transmittance of the evaluation sample was taken as the baseline, and the ratio of the transmittance (amount of transmitted light) of the evaluation sample to the transmittance (amount of transmitted light) of the alkali-free glass was taken as the transmittance of the adhesive sheet. According to the transmittance spectrum of the adhesive sheet, the transmittance T at a wavelength of 550 nm was calculated.

[0061] The main reagents / materials used in this example are as follows:

[0062] Hydrogenated styrene-butadiene block copolymer SEBS: Kraton G-1650 (S / EB = 3:7), produced by Shell;

[0063] Vinyl chloride-vinyl acetate resin: Kanevinyl TM HM 515, average degree of polymerization 450, vinyl acetate content 17%; Kanevinyl TM MB1008, average degree of polymerization 680, vinyl acetate content 10%; produced by KANEKA Corporation;

[0064] Fluorocarbon resin: CX-803 type two-component solvent type fluorocarbon resin of Shanghai Derui Company;

[0065] Silicone resin: N-vinylbenzyl-N-(aminoethyl)-3-aminopropyl polysiloxane (Dynasylan 1175).

[0066] Example 1

[0067] (1) Preparation of the first component:

[0068] Take 45 parts of m-xylene, 10 parts of ethylbenzene, 10 parts of tert-butyl acetate, 3 parts of ethyl acetate, 2 parts of N-methyl pyrrolidone, put into a flask and mix uniformly, then add 10 parts of hydrogenated styrene-diene block copolymer, 7 parts of chlorovinyl acetate resin Kanevinyl TM HM 515, 7 parts of fluorocarbon resin, 4 parts of silicone resin, and mix uniformly, stir at room temperature 25℃ for 2h. After adding 0.1 parts of ultraviolet absorber THUV-328 (2-(2H-benzotriazole-2-yl)-4,6-di-tert-pentyl phenol) and 0.1 parts of light stabilizer 770 (bis-2,2,6,6-tetramethylpiperidinol decanedioate), mix uniformly to obtain the first component.

[0069] (2) Preparation of the second component:

[0070] Take 83 parts of ethyl acetate, 15 parts of Zonyl FSN 100 non-ionic fluorocarbon surfactant, 3 parts of silicone resin, and 0.3 parts of antioxidant 1010, stir at room temperature for 30 min to obtain a uniform second component.

[0071] (3) Coating operation:

[0072] First, spray the first component on a 10cm x 10cm size alkali-free glass substrate, spray 1g of the first component, spray 1g of the second component after 30 min, and solidify at room temperature for 10 min to prepare a glass with a hydrophobic layer. The static contact angle test results of the coating prepared in this example are shown in Figure 1 , the SEM electron micrograph is shown in Figure 2 , and the contact angle is 154.4°; the visible light transmittance is 96%.

[0073] Example 2

[0074] (1) Preparation of the first component:

[0075] Take 20 parts of m-xylene, 5 parts of ethylbenzene, 5 parts of tert-butyl acetate, 1 part of ethyl acetate, 1 part of N-methyl pyrrolidone, put into a flask and mix uniformly, then add 10 parts of hydrogenated styrene-diene block copolymer, 7 parts of chlorovinyl acetate resin Kanevinyl TMHM 515, 7 parts of fluorocarbon resin, 4 parts of silicone resin were mixed uniformly, stirred at room temperature 25°C for 2h. After adding 0.1 part of ultraviolet absorber THUV-3280, 0.1 part of light stabilizer 770, the first component was obtained by mixing uniformly.

[0076] (2) Preparation of the second component:

[0077] Take 32 parts of ethyl acetate, 15 parts of non-ionic fluorocarbon surfactant, 3 parts of silicone resin, 0.3 parts of antioxidant 1010 in a round-bottom flask, stir at room temperature for 30 min, get the second component uniformly.

[0078] (3) Coating operation:

[0079] The coating operation is the same as example 1, the only difference is that the curing time of the first component is 15 min. The contact angle of the coating prepared in this example is 142.1°, the visible light transmittance is 92%.

[0080] Example 3

[0081] (1) Preparation of the first component:

[0082] Take 20 parts of m-xylene, 10 parts of ethylbenzene, 10 parts of t-butyl acetate, 3 parts of ethyl acetate, 2 parts of N-methyl pyrrolidone, put into a flask and mix uniformly, then add 10 parts of hydrogenated styrene-diene block copolymer, 7 parts of chlorovinyl acetate resin Kanevinyl TM HM 515, 20 parts of fluorocarbon resin, 8 parts of silicone resin were mixed uniformly, stirred at room temperature 25°C for 2h. After adding 0.1 part of ultraviolet absorber THUV-3280, 0.1 part of light stabilizer 770, the first component was obtained by mixing uniformly.

[0083] (2) Preparation of the second component:

[0084] Take 25 parts of ethyl acetate, 20 parts of Zonyl FSN 100 non-ionic fluorocarbon surfactant, 3 parts of silicone resin, 0.3 parts of antioxidant 1010 in a flask, stir at room temperature for 30 min, get the second component uniformly.

[0085] (3) Coating operation:

[0086] The coating operation is the same as example 1, the only difference is that the curing time of the first component is 10 min, and the curing time of the second component is 5 min. The curing time is shortened, but the viscosity is increased, and the spraying difficulty is increased.

[0087] The contact angle of the coating prepared in this example is 158.7°, the visible light transmittance is 90%.

[0088] Example 4

[0089] (1) Preparation of the first component:

[0090] Take 35 parts of m-xylene, 7 parts of ethylbenzene, 7 parts of t-butyl acetate, 7 parts of ethyl acetate, 2 parts of N-methyl pyrrolidone, put into a flask and mix evenly, then add 20 parts of hydrogenated styrene-diene block copolymer, 15 parts of chlorovinyl acetate resin, 15 parts of fluorocarbon resin, 15 parts of silicone resin and mix evenly, stir at room temperature 25°C for 2h. After adding 0.5 parts of ultraviolet absorber THUV-3280 and 0.5 parts of light stabilizer 770, stir at room temperature for 30 min, mix evenly to obtain the first component.

[0091] (2) Preparation of the second component:

[0092] Take 35 parts of 2-methyl pentanal, 5 parts of ethyl acetate, 15 parts of non-ionic fluorocarbon surfactant, 3 parts of silicone resin, 0.5 parts of antioxidant 1010, put into a flask, stir at room temperature for 30 min to obtain a uniform second component.

[0093] (3) Coating operation:

[0094] The coating operation is the same as in Example 1, except that the curing time of the first component is 15 min and the curing time of the second component is 10 min, and a hydrophobic layer is prepared. The contact angle of the coating prepared in this example is 150.2°, and the curing time is shortened.

[0095] Example 5

[0096] The difference from Example 1 is that after mixing the first component and the second component evenly, 2g of the mixture is sprayed on the substrate at one time, and the curing time is 40 min to form a hydrophobic layer. The contact angle of the coating prepared in this example is 133.1°, and the visible light transmittance is 95%.

[0097] Example 6

[0098] The difference from Example 1 is that the chlorovinyl acetate resin Kanevinyl TM HM 515 is replaced by Kanevinyl TM MB1008. The contact angle of the coating prepared in this example is 142.3°, and the visible light transmittance is 92%. The spraying difficulty is high, the film uniformity is reduced, and the visible light transmittance is reduced.

[0099] Comparative Example 1

[0100] (1) Preparation of the first component:

[0101] Take 45 parts of m-xylene, 10 parts of ethylbenzene, 10 parts of t-butyl acetate, 3 parts of 2-methylvaleraldehyde, 2 parts of N-methylpyrrolidone, put into a three-necked flask and mix uniformly, then add 10 parts of hydrogenated styrene-diene block copolymer, 7 parts of chloroacetic resin, 4 parts of silicone resin and mix uniformly, stir at room temperature 25°C for 2h. After adding 0.1 part of ultraviolet absorber THUV-3280 and 0.1 part of light stabilizer 770, mix uniformly to obtain the first component.

[0102] (2) Preparation of the second component:

[0103] Take 78 parts of 2-methylvaleraldehyde, 5 parts of ethyl acetate, 3 parts of silicone resin, 0.3 parts of antioxidant 1010, and place them in a round-bottom flask. Stir at room temperature for 30 min to obtain a uniform second component.

[0104] (3) Coating operation:

[0105] The coating operation is the same as in Example 1, and a coating is prepared.

[0106] The contact angle of the coating prepared in this Comparative Example 1 is 98.2°, and the hydrophobicity is significantly reduced compared to Comparative Example 1. The visible light transmittance is 87%.

[0107] Comparative Example 2

[0108] (1) Preparation of the first component:

[0109] Take 45 parts of m-xylene, 10 parts of ethylbenzene, 10 parts of t-butyl acetate, 3 parts of 2-methylvaleraldehyde, 2 parts of N-methylpyrrolidone, put into a three-necked flask and mix uniformly, then add 10 parts of hydrogenated styrene-diene block copolymer, 10 parts of chloroacetic resin, 7 parts of silicone resin and mix uniformly, stir at room temperature 25°C for 2h. After adding 0.1 part of ultraviolet absorber THUV-3280 and 0.1 part of light stabilizer 770, mix uniformly to obtain the first component.

[0110] (2) Preparation of the second component:

[0111] Take 83 parts of ethyl acetate, 3 parts of silicone resin, 0.3 parts of antioxidant 1010, and place them in a round-bottom flask. Stir at room temperature for 30 min to obtain a uniform second component.

[0112] (3) Coating operation:

[0113] The coating operation is the same as in Example 1, and a coating is prepared.

[0114] The contact angle of the coating prepared in this Comparative Example 1 is 94.3°, and the visible light transmittance is 84.5%.

[0115] Comparative Example 3

[0116] The difference from Example 1 is only that 15 parts of Zonyl FSN 100 non-ionic fluorocarbon surfactant is replaced by Zonyl FSJ anionic fluorocarbon surfactant, and a coating is prepared.

[0117] The coating prepared in this Comparative Example 3 has a contact angle of 97.2° and a visible light transmittance of 93%.

[0118] Comparative Example 4

[0119] The difference from Example 1 is only that 15 parts of Zonyl FSN 100 non-ionic fluorocarbon surfactant is replaced by Triton TM X-405 (Dow Chemical, octylphenol polyoxyethylene ether X-405), and a coating is prepared.

[0120] The coating prepared in this Comparative Example 3 has a contact angle of 98.6° and a visible light transmittance of 84%.

[0121] From the above examples and comparative examples, it can be seen that the hydrophobic material provided in the examples can form a coating with excellent hydrophobic properties and good transparency. From Comparative Examples 1 and 2, it can be seen that fluorocarbon resin plays a key role in hydrophobic properties. When no fluorocarbon resin is added, even if the second hydrophobic layer still contains Zonyl FSN 100 non-ionic fluorocarbon surfactant, the contact angle of the coating material is still significantly reduced. From Comparative Examples 1 and 2, it can be seen that even if the same fluorine-containing surfactant is added, if it is anionic, the contact angle is still reduced. One possible explanation is that the synergistic effect of anionic surfactant with fluorocarbon resin is lower, and it is more hydrophilic, resulting in weakened hydrophobicity.

[0122] The above-described examples only express several embodiments of the present application, facilitate specific and detailed understanding of the technical solutions of the present application, but should not be understood as a limitation on the scope of patent protection. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. An article having a hydrophobic layer, characterized in that, comprising a carrier and a hydrophobic layer, the hydrophobic layer comprises a first hydrophobic layer and a second hydrophobic layer, the first hydrophobic layer is disposed on the surface of the carrier; the second hydrophobic layer is disposed on the side of the first hydrophobic layer away from the surface of the carrier; the raw material of the first hydrophobic layer comprises a first component, and the raw material of the second hydrophobic layer comprises a second component; by weight, the first component comprises: 10-30 parts of a film forming agent, 10-50 parts of a first resin, 0.1-1 part of an ultraviolet absorber, 20-80 parts of a first organic solvent; the second component comprises: 10-50 parts of a non-ionic fluorine-containing surfactant, 5-20 parts of a second silicone resin, 0.1-0.5 parts of an antioxidant, and 30-90 parts of a second organic solvent; wherein the first resin comprises a combination of chlorovinyl acetate resin, first silicone resin and fluorocarbon resin, and the mass ratio of chlorovinyl acetate resin, first silicone resin and fluorocarbon resin is (0.5-5):(1-5):1, the average polymerization degree of chlorovinyl acetate resin is 350-450, and the vinyl acetate content is 15%-20%.

2. The article according to claim 1, characterized in that, the first organic solvent and the second organic solvent are each independently selected from at least one of 2-methyl pentanal, ethyl acetate, m-xylene, ethylbenzene, tert-butyl acetate, and N-methyl pyrrolidone.

3. The article according to claim 1 or 2, characterized in that, the film forming agent is selected from at least one of hydrogenated styrene-butadiene block copolymer or cellulose acetate; and / or the ultraviolet absorber is selected from at least one of bis-2,2,6,6-tetramethylpiperidinyl octadecanedioate and 2-(2H-benzotriazol-2-yl)-4,6-di-tert-amylphenol; and / or the antioxidant is selected from pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate].

4. The article according to claim 1 or 2, characterized in that, the non-ionic fluorine-containing surfactant is selected from Zonyl FSN 100 non-ionic surfactant; and / or the first component and the second component are independently formulated.

5. The article according to claim 1, characterized in that, the fluorocarbon resin is selected from solvent type fluorocarbon resin; the first silicone resin and the second silicone resin are each independently selected from amino-containing polysiloxane.

6. The article according to claim 1, characterized in that, the carrier is at least one of a glass material, a metal material, a resin material, or a wooden formed body surface.

7. A method for preparing the article according to any one of claims 1-6, characterized in that, comprising the following steps: providing a clean surface of a carrier; preparing a first component, disposing the mixture of the first component on the clean surface of the carrier, curing to form a first hydrophobic layer; and preparing a second component, disposing the mixture of the second component on the surface of the first hydrophobic layer, curing to form a second hydrophobic layer, thereby obtaining the article.

8. The method according to claim 7, characterized in that, The preparation of the first component comprises mixing the film forming agent, the first resin and the first organic solvent of the first component, stirring for more than 2 hours at room temperature, then adding the ultraviolet absorber, and continuing to stir for 30-60 minutes; The preparation of the second component comprises mixing all the raw materials of the second component, and stirring for 30-60 minutes at room temperature; The curing condition of the first hydrophobic layer is curing at a temperature of 20-150°C for 30-60 minutes; and / or The curing condition of the second hydrophobic layer is curing at a temperature of 20-150°C for 10-60 minutes.

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