Coating composition, and preparation method therefor and use thereof

Abstract

Disclosed in the present application are a coating composition, and a preparation method therefor and the use thereof. The coating composition comprises a silicon-fluorine resin, a silane coupling agent and a solvent, wherein raw materials for preparing the silicon-fluorine resin comprise a fluorosilane-modified nano silica sol, fluorosilicone oil and a perfluorinated compound.

Description

A coating composition, its preparation method and application

[0001] Related applications must be cross-referenced.

[0002] This application claims priority to Chinese Patent Application No. 202411912742.1, filed on December 23, 2024, entitled “A Coating Composition and its Preparation Method and Application”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of coating technology, and in particular to a coating composition, its preparation method, and its application. Background Technology

[0004] With economic development and improved living standards, people have increasingly higher requirements for home appliances, especially kitchen appliances that come into frequent and prolonged contact with various oil stains, seasonings, acids, and alkalis. For example, gas stoves and range hoods are exposed to high and low temperatures and heavy oil stains for extended periods, requiring frequent and irregular cleaning. Currently, most gas stove and range hood panels are made of glass, making them difficult to clean once oil stains adhere. The relevant technology involves applying an easy-clean coating to the glass surface. However, existing easy-clean coating technologies have not yet reached the level expected by the market. Some products on the market have poor stability, and their oleophobic effect gradually diminishes during use, leading to problems such as poor high-temperature resistance and poor wear resistance of the coating.

[0005] Therefore, it is necessary to develop a coating composition that is resistant to high temperatures, wear, and easy to clean. Summary of the Invention

[0006] This application aims to at least solve one of the technical problems existing in the prior art. To this end, the first aspect of this application proposes a coating composition, wherein the coating prepared by the coating composition has the effects of high temperature resistance, wear resistance and easy cleaning.

[0007] A second aspect of this application also provides a method for preparing a coating composition.

[0008] A third aspect of this application also provides a coating.

[0009] The fourth aspect of this application also provides a method for preparing a coating.

[0010] The fifth aspect of this application also provides a household appliance.

[0011] The coating composition provided according to the first aspect of the present application includes a fluorosilicone resin, a silane coupling agent, and a solvent;

[0012] The raw materials for preparing the fluorosilicone resin include fluorosilane-modified nano silica sol, fluorosilicone oil, and perfluorinated compounds.

[0013] The coating composition according to the embodiments of this application has at least the following beneficial effects:

[0014] The embodiments of this application use fluorosilane-modified nano-silica sol, fluorosilicone oil and perfluorinated compounds as raw materials to prepare a fluorosilicone resin, which is then combined with a silane coupling agent and a solvent to form a coating. This coating can have the effects of high temperature resistance, wear resistance and easy cleaning.

[0015] This is because the fluorosilane-modified nano-silica sol, fluorosilicone oil, and perfluorinated compound used in the embodiments of this application have high temperature resistance and hydrophobic properties. The coating formed by combining it with the silane coupling agent has high adhesion to the substrate, high density, and good wear resistance and high temperature resistance.

[0016] According to some embodiments of this application, the raw materials for preparing the silicone fluoropolymer resin include 1 wt.% to 60 wt.% fluorosilane-modified nano silica sol, 20 wt.% to 75 wt.% fluorosilicone oil, and 20 wt.% to 90 wt.% perfluorinated compound; the sum of the percentages of each raw material in the silicone fluoropolymer resin is 100 wt.%.

[0017] According to some embodiments of this application, the amount of the silicone fluoropolymer, silane coupling agent, and solvent is 0.01 wt.% to 50 wt.%, calculated based on the total mass of the silicone fluoropolymer, silane coupling agent, and solvent. This includes any value therein and all ranges and any subranges. Examples include 0.01 wt.%, 0.1 wt.%, 1 wt.%, 5 wt.%, 10 wt.%, 30 wt.%, and 50 wt.%.

[0018] According to some embodiments of this application, the amount of the fluorosilicone resin, calculated based on the total mass of the fluorosilicone resin, silane coupling agent, and solvent, is 0.01 wt.% to 10 wt.%, including any value therein and all ranges and any subranges. For example, it includes 0.01 wt.%, 0.1 wt.%, 1 wt.%, 2 wt.%, 2.5 wt.%, 4.5 wt.%, 6 wt.%, and 10 wt.%. Thus, when the amount of the fluorosilicone resin is within the above range, as a film-forming substance for the coating, it provides hydrophobic and oleophobic properties, as well as high-temperature resistance and wear resistance.

[0019] According to some embodiments of this application, the amount of the silane coupling agent, calculated based on the total mass of the silicone fluoropolymer, silane coupling agent, and solvent, is 0.01 wt.% to 30 wt.%, including any value therein and all ranges and any subranges. For example, it includes 0.01 wt.%, 0.1 wt.%, 1 wt.%, 5 wt.%, 10 wt.%, and 30 wt.%.

[0020] According to some embodiments of this application, the amount of the silane coupling agent, calculated based on the total mass of the silicone fluoropolymer, silane coupling agent, and solvent, is 0.1 wt.% to 15 wt.%, including any value therein and all ranges and any subranges. For example, it includes 0.1 wt.%, 1 wt.%, 5 wt.%, 10 wt.%, and 15 wt.%. Therefore, when the amount of the silane coupling agent is within the above range, the prepared coating exhibits good leveling properties and good adhesion to the substrate.

[0021] According to some embodiments of this application, the amount of solvent used is 20 wt.% to 96 wt.%, calculated based on the total mass of the silicone fluoropolymer, silane coupling agent, and solvent. This includes any value therein and all ranges and any subranges. Examples include 20 wt.%, 30 wt.%, 40 wt.%, 50 wt.%, 65 wt.%, 70 wt.%, 80 wt.%, 85 wt.%, and 96 wt.%.

[0022] According to some embodiments of this application, the amount of solvent used is 65 wt.% to 95 wt.%, calculated based on the total mass of the silicone fluoropolymer, silane coupling agent, and solvent. This includes any value therein and all ranges and any subranges. For example, it includes 65 wt.%, 70 wt.%, 75 wt.%, 80 wt.%, and 95 wt.%.

[0023] According to some embodiments of this application, the silica content in the fluorosilane-modified nano-silica sol is 5 wt.% to 60 wt.%, including any value therein and all ranges and any subranges. For example, it includes 5 wt.%, 10 wt.%, 15 wt.%, 20 wt.%, 25 wt.%, 30 wt.%, 35 wt.%, 40 wt.%, 50 wt.%, and 60 wt.%.

[0024] According to some embodiments of this application, the silica content in the fluorosilane-modified nano-silica sol is 15 wt.% to 35 wt.%, including any value therein and all ranges and any subranges. For example, it includes 15 wt.%, 25 wt.%, 30 wt.%, and 35 wt.%. Therefore, when the amount of the fluorosilane-modified nano-silica sol is within the above range, the prepared fluorosilicone resin has a better viscosity.

[0025] According to some embodiments of this application, the particle size of the nano-silica in the fluorosilane-modified nano-silica sol is 1–1000 nm. This includes any value therein, all ranges, and any sub-ranges. For example, it includes 1 nm, 15 nm, 50 nm, 100 nm, 200 nm, 300 nm, 500 nm, 600 nm, 800 nm, 900 nm, and 1000 nm.

[0026] According to some embodiments of this application, the fluorosilicone oil includes at least one of methyl fluorosilicone oil, vinyl fluorosilicone oil, hydroxyl fluorosilicone oil, perfluorosilicone oil, vinyl epoxy fluorosilicone oil, copolymer methyl fluorosilicone oil, hydrofluoric acid-containing silicone oil, or copolymer hydroxyl fluorosilicone oil.

[0027] According to some embodiments of this application, the perfluorinated compound includes at least one of perfluorinated polyether, 1H,1H,2H-perfluoro-1-decane, perfluorododecane, perfluorohexadecyl alcohol, perfluorohexadecane, brominated perfluorododecane, perfluorododecyl ether, perfluorohexadecyl ether, perfluoroalkyl polyether, perfluoroalkyl propanol, or perfluorododecyl ethylene.

[0028] According to some embodiments of this application, the type of silane coupling agent is not required, as long as it can achieve the function of a silane coupling agent, such as silane coupling agents KH-602, SI-69, and KH-702.

[0029] At least one of the following: silane coupling agent CG-171, silane coupling agent AC-62, silane coupling agent HD-561, silane coupling agent CG-608, silane coupling agent HD-520, silane coupling agent KH-570, silane coupling agent CG-605, silane coupling agent 1706, silane coupling agent HD-602, silane coupling agent KH-580, silane coupling agent CG-301, or silane coupling agent KH-902.

[0030] According to some embodiments of this application, the solvent includes one of alkane solvents, ether solvents, ketone solvents, or benzene-derived biological solvents.

[0031] According to some embodiments of this application, the alkane solvent is selected from at least one of n-hexane, n-octane, n-decane, dichloroethylene, and mineral oil (CAS No. 8042-47-5).

[0032] According to some embodiments of this application, the ether solvent is selected from at least one of diethyl ether, petroleum ether, dibutyl ether, or fluoroether.

[0033] According to some embodiments of this application, the ketone solvent is selected from at least one of acetone, methyl ethyl ketone, or cyclohexanone.

[0034] According to some embodiments of this application, a metal catalyst is also added during the preparation of the silicone fluoropolymer.

[0035] According to some embodiments of this application, the amount of the metal catalyst is 1 wt.% to 20 wt.% based on the total mass of the fluorosilane-modified nano silica sol, fluorosilicone oil, and perfluorinated compound.

[0036] According to some embodiments of this application, the metal catalyst includes at least one of electrolytic silver catalyst, molten iron catalyst, platinum mesh catalyst, platinum catalyst, and Pt-Re / -Al2O3 catalyst.

[0037] According to some embodiments of this application, the silicone fluoropolymer is prepared by the following method:

[0038] The product is obtained by mixing and heating a mixture of fluorosilane-modified nano-silica sol, fluorosilicone oil, perfluorinated compound and metal catalyst.

[0039] A method for preparing a coating composition according to a second aspect of this application, the method comprising: mixing the components of the coating composition described in the first aspect of this application.

[0040] The method for preparing the coating composition according to the embodiments of this application has at least the following beneficial effects:

[0041] The preparation method of the coating composition according to the embodiments of this application is simple to operate and can be realized in large-scale industrial production.

[0042] A third aspect of this application provides a coating comprising the coating composition described in the embodiments of the first aspect of this application.

[0043] The coating according to the embodiments of this application has at least the following beneficial effects:

[0044] The coating provided in the embodiments of this application is obtained by applying the aforementioned coating composition, and therefore also has the technical effects of the coating described above. The embodiments of this application apply the above-mentioned coating to a substrate, and the resulting coating has the effects of high temperature resistance, wear resistance, and easy cleaning.

[0045] According to some embodiments of this application, the coating further includes a substrate.

[0046] According to some embodiments of this application, the substrate includes at least one of a glass substrate, a metal substrate, a ceramic substrate, or an enamel substrate.

[0047] According to some embodiments of this application, the substrate further includes pretreatment.

[0048] According to some embodiments of this application, the pretreatment includes removing impurities from the surface of the substrate and then subjecting it to plasma treatment. As a result, the pretreated glass substrate exhibits better adhesion to the coating of this application.

[0049] According to some embodiments of this application, the thickness of the coating is 1–2000 nm, including any value therein and all ranges and any subranges. For example, it includes 1 nm, 10 nm, 50 nm, 100 nm, 200 nm, 500 nm, 800 nm, 1000 nm, 1200 nm, 1500 nm, 1800 nm, and 2000 nm.

[0050] The fourth aspect of this application provides a method for preparing a coating, comprising the following steps:

[0051] The coating composition described in the first aspect of this application is obtained by applying it to the surface of a substrate and then heat-treating it.

[0052] The coating preparation method according to the embodiments of this application has at least the following beneficial effects:

[0053] The coating preparation method of this application is simple to operate and can be obtained through heat treatment, which can realize large-scale industrial production.

[0054] According to some embodiments of this application, the temperature of the heat treatment is 100–160°C, including any value therein and all ranges and any subranges. For example, it includes 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, or 160°C.

[0055] According to some embodiments of this application, the heat treatment time is 30 to 180 minutes, including any value, all ranges, and any subranges thereof. For example, it includes 30 minutes, 60 minutes, 90 minutes, 120 minutes, 150 minutes, or 180 minutes.

[0056] The fifth aspect of this application provides a household appliance, wherein at least a portion of the surface of the household appliance is coated with the coating described in the third aspect of this application.

[0057] The household appliances according to the embodiments of this application have at least the following beneficial effects:

[0058] The household appliances provided in the embodiments of this application have their surfaces coated with the coating described in the third aspect of this application. Therefore, they also possess the technical effects of the coating described above. The surface coating of the kitchen appliances in the embodiments of this application has the effects of high temperature resistance, wear resistance, and easy cleaning.

[0059] According to some embodiments of this application, the household appliance includes a range hood, a cooktop, a dishwasher, a microwave oven, or an oven.

[0060] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing this application. Detailed Implementation

[0061] The following will clearly and completely describe the concept and technical effects of this application in conjunction with embodiments, so as to fully understand the purpose, features and effects of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are all within the scope of protection of this application.

[0062] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] In some embodiments of this application, a fluorosilicone resin, a silane coupling agent, and a solvent are provided;

[0064] The raw materials for preparing the fluorosilicone resin include fluorosilane-modified nano silica sol, fluorosilicone oil, and perfluorinated compounds.

[0065] It is understood that the silicone-fluoropolymer prepared by this application using fluorosilane-modified nano-silica sol, fluorosilicone oil and perfluorinated compounds as raw materials, combined with silane coupling agents and solvents to form a coating, the coating formed by the coating has the effects of high temperature resistance, wear resistance and easy cleaning.

[0066] Furthermore, the fluorosilane-modified nano-silica sol, fluorosilicone oil, and perfluorinated compound used in this application to prepare the fluorosilicone resin has high temperature resistance and hydrophobic properties. The coating formed with the silane coupling agent has high adhesion to the substrate, high density, and good wear resistance.

[0067] In some embodiments of this application, the raw materials for preparing the silicone fluoropolymer include 1 wt.% to 60 wt.% fluorosilane-modified nano silica sol, 20 wt.% to 75 wt.% fluorosilicone oil, and 20 wt.% to 90 wt.% perfluorinated compound; the sum of the percentages of each raw material in the silicone fluoropolymer is 100 wt.%.

[0068] In some embodiments of this application, the amount of the silicone fluoropolymer used is 0.01 wt.% to 50 wt.%, calculated based on the total mass of the silicone fluoropolymer, silane coupling agent, and solvent. This includes any value therein and all ranges and any subranges. Examples include 0.01 wt.%, 0.1 wt.%, 1 wt.%, 5 wt.%, 10 wt.%, 30 wt.%, and 50 wt.%.

[0069] In some embodiments of this application, the amount of the fluorosilicone resin, calculated based on the total mass of the fluorosilicone resin, silane coupling agent, and solvent, is 0.01 wt.% to 10 wt.%, including any value therein and all ranges and any subranges. For example, it includes 0.01 wt.%, 0.1 wt.%, 1 wt.%, 2 wt.%, 2.5 wt.%, 4.5 wt.%, 6 wt.%, and 10 wt.%. Thus, when the amount of the fluorosilicone resin is within the above range, as a film-forming material for the coating, it provides hydrophobic and oleophobic properties, as well as high-temperature resistance and wear resistance.

[0070] In some embodiments of this application, the amount of the silane coupling agent is 0.01 wt.% to 30 wt.%, calculated based on the total mass of the silicone fluoropolymer, silane coupling agent, and solvent. This includes any value therein and all ranges and any subranges. Examples include 0.01 wt.%, 0.1 wt.%, 1 wt.%, 5 wt.%, 10 wt.%, and 30 wt.%.

[0071] In some embodiments of this application, the amount of the silane coupling agent, calculated based on the total mass of the silicone fluoropolymer, silane coupling agent, and solvent, is 0.1 wt.% to 15 wt.%, including any value and all ranges and subranges thereof. For example, it includes 0.1 wt.%, 1 wt.%, 5 wt.%, 10 wt.%, and 15 wt.%. Therefore, when the amount of the silane coupling agent is within the above range, the prepared coating exhibits good leveling properties and good adhesion to the substrate.

[0072] In some embodiments of this application, the amount of solvent used is 20 wt.% to 96 wt.%, calculated based on the total mass of the silicone fluoropolymer, silane coupling agent, and solvent. This includes any value therein and all ranges and any subranges. Examples include 20 wt.%, 30 wt.%, 40 wt.%, 50 wt.%, 65 wt.%, 70 wt.%, 80 wt.%, 85 wt.%, and 96 wt.%.

[0073] In some embodiments of this application, the amount of solvent used is 65 wt.% to 95 wt.%, calculated based on the total mass of the silicone fluoropolymer, silane coupling agent, and solvent. This includes any value therein and all ranges and any subranges. Examples include 65 wt.%, 70 wt.%, 75 wt.%, 80 wt.%, and 95 wt.%.

[0074] In some embodiments of this application, the silica content in the fluorosilane-modified nano-silica sol is 5 wt.% to 60 wt.%, including any value therein and all ranges and any subranges. For example, it includes 5 wt.%, 10 wt.%, 15 wt.%, 20 wt.%, 25 wt.%, 30 wt.%, 35 wt.%, 40 wt.%, 50 wt.%, and 60 wt.%.

[0075] In some embodiments of this application, the silica content in the fluorosilane-modified nano-silica sol is 15 wt.% to 35 wt.%, including any value therein and all ranges and subranges. For example, it includes 15 wt.%, 25 wt.%, 30 wt.%, and 35 wt.%. Therefore, when the amount of the fluorosilane-modified nano-silica sol is within the above range, the prepared fluorosilicone resin has a better viscosity.

[0076] In some embodiments of this application, the particle size of the nano-silica in the fluorosilane-modified nano-silica sol is 1–1000 nm, including any value and all ranges and subranges thereof. Examples include 1 nm, 15 nm, 50 nm, 100 nm, 200 nm, 300 nm, 500 nm, 600 nm, 800 nm, 900 nm, and 1000 nm.

[0077] In some embodiments of this application, the fluorosilicone oil includes at least one of methyl fluorosilicone oil, vinyl fluorosilicone oil, hydroxyl fluorosilicone oil, perfluorosilicone oil, vinyl epoxy fluorosilicone oil, copolymer methyl fluorosilicone oil, hydrofluorosilicone oil, or copolymer hydroxyl fluorosilicone oil.

[0078] In some embodiments of this application, the perfluorinated compound includes at least one of perfluoropolyether, 1H,1H,2H-perfluoro-1-decane, perfluorododecane, perfluorohexadecyl alcohol, perfluorohexadecane, brominated perfluorododecane, perfluorododecyl ether, perfluorohexadecyl ether, perfluoroalkyl polyether, perfluoroalkyl propanol, or perfluorododecyl ethylene.

[0079] In some embodiments of this application, the type of silane coupling agent is not required, as long as it can achieve the function of a silane coupling agent. Examples include silane coupling agents KH-602, SI-69, and KH-702.

[0080] At least one of the following: silane coupling agent CG-171, silane coupling agent AC-62, silane coupling agent HD-561, silane coupling agent CG-608, silane coupling agent HD-520, silane coupling agent KH-570, silane coupling agent CG-605, silane coupling agent 1706, silane coupling agent HD-602, silane coupling agent KH-580, silane coupling agent CG-301, or silane coupling agent KH-902.

[0081] In some embodiments of this application, the solvent includes one of alkane solvents, ether solvents, ketone solvents, or benzene-derived biological solvents.

[0082] In some embodiments of this application, the alkane solvent is selected from at least one of n-hexane, n-octane, n-decane, dichloroethylene, and mineral oil (CAS No. 8042-47-5).

[0083] In some embodiments of this application, the ether solvent is selected from at least one of diethyl ether, petroleum ether, dibutyl ether, or fluoroether.

[0084] In some embodiments of this application, the ketone solvent is selected from at least one of acetone, methyl ethyl ketone, or cyclohexanone.

[0085] In some embodiments of this application, a metal catalyst is also added during the preparation of the silicone fluoropolymer.

[0086] In some embodiments of this application, the amount of the metal catalyst is 1 wt.% to 20 wt.% of the total mass, calculated based on the total mass of the fluorosilane-modified nano-silica sol, fluorosilicone oil, and perfluorinated compound. This includes any value therein and all ranges and any subranges. For example, it includes 1 wt.%, 5 wt.%, 10 wt.%, 15 wt.%, or 20 wt.%.

[0087] In some embodiments of this application, the metal catalyst includes at least one of electrolytic silver catalyst, molten iron catalyst, platinum mesh catalyst, platinum catalyst, and Pt-Re / -Al2O3 catalyst.

[0088] In some embodiments of this application, the silicone fluoropolymer is prepared by the following method:

[0089] The product is obtained by mixing and heating a mixture of fluorosilane-modified nano-silica sol, fluorosilicone oil, perfluorinated compound and metal catalyst.

[0090] In some embodiments of this application, a method for preparing a coating composition is provided, the method comprising: mixing the components of the coating composition described in the first aspect of this application.

[0091] It is understood that the preparation method of the coating composition of this application is simple to operate and can be realized in large-scale industrial production.

[0092] In some embodiments of this application, a coating is provided, comprising the coating composition described in the first aspect of this application.

[0093] It is understood that the coating provided in this application is obtained by applying the aforementioned coating composition, and therefore also has the technical effects of the coating described above. This application applies the above-mentioned coating to a substrate, and the resulting coating has the effects of high temperature resistance, wear resistance, and easy cleaning.

[0094] In some embodiments of this application, the coating may also include a substrate.

[0095] In some embodiments of this application, the substrate includes at least one of a glass substrate, a metal substrate, a ceramic substrate, or an enamel substrate.

[0096] In some embodiments of this application, the substrate further includes pretreatment.

[0097] In some embodiments of this application, the pretreatment includes removing impurities from the surface of the substrate and then subjecting it to plasma treatment. As a result, the pretreated glass substrate exhibits better adhesion to the coating of this application.

[0098] In some embodiments of this application, the thickness of the coating is 1–2000 nm, including any value therein and all ranges and any subranges. For example, it includes 1 nm, 10 nm, 50 nm, 100 nm, 200 nm, 500 nm, 800 nm, 1000 nm, 1200 nm, 1500 nm, 1800 nm, and 2000 nm.

[0099] In some embodiments of this application, a method for preparing a coating is provided, comprising the following steps:

[0100] The coating composition described in the first aspect of this application is obtained by applying it to the surface of a substrate and then heat-treating it.

[0101] It is understandable that the coating preparation method of this application is simple to operate and can be obtained through heat treatment, enabling large-scale industrial production.

[0102] In some embodiments of this application, the heat treatment temperature is 100–160°C, including any value therein and all ranges and subranges. For example, it includes 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, or 160°C.

[0103] In some embodiments of this application, the heat treatment time is 30 to 180 minutes, including any value, all ranges, and any subranges thereof. Examples include 30 minutes, 60 minutes, 90 minutes, 120 minutes, 150 minutes, or 180 minutes.

[0104] In some embodiments of this application, the coating method includes, but is not limited to, one or a combination of two or more of spraying, spin coating, curtain coating, dip coating, and roller coating.

[0105] In some embodiments of this application, a household appliance is provided, wherein at least a portion of the surface of the household appliance is coated with the coating described in the fourth aspect of this application.

[0106] It is understood that the household appliance provided in this application has its surface coated with the coating described in the third aspect of this application. Therefore, it also has the technical effects of the coating described above. The surface coating of the household appliance in this application has the effects of high temperature resistance, wear resistance, and easy cleaning.

[0107] In some embodiments of this application, the household appliance includes a range hood, a cooktop, a dishwasher, a microwave oven, or an oven.

[0108] In some embodiments of this application, the temperature resistance of the coating is determined by the water contact angle method, that is, the prepared coating is heated to 250°C in an oven and held at that temperature for 144 hours, and then its water contact angle is tested. If the water contact angle is less than 90°, it is determined that the temperature resistance is lost. The higher the temperature, the better the high temperature resistance of the coating.

[0109] In some embodiments of this application, the water contact angle of the coating formed by the coating composition of this application is greater than 101°.

[0110] In some embodiments of this application, the coating formed by the coating composition of this application has a water contact angle attenuation of ≤3.7° after being exposed to 250°C and held at that temperature for 144 hours.

[0111] In some embodiments of this application, the wear resistance of the coating is determined by the water contact angle method, that is, the prepared coating is wet-rubbed with a 1.5kg load for 50,000 cycles and then the water contact angle is tested to check the degree of attenuation of the water contact angle before and after the wear resistance test. The lower the attenuation, the better the wear resistance.

[0112] In some embodiments of this application, the coating formed by the coating composition of this application has a water contact angle attenuation of ≤3.4° after 50,000 wet grinding cycles under a 1.5kg load.

[0113] Furthermore, some of the raw materials used in the embodiments and comparative examples of this application are as follows:

[0114] Fluorosilane-modified nano-silica sol A: SiO2 content is 30 wt.%; nano-silica particle size is 15 nm;

[0115] Fluorosilane-modified nano-silica sol B: SiO2 content is 25 wt.%; nano-silica particle size is 15 nm;

[0116] Fluorosilane-modified nano-silica sol C: SiO2 content is 35 wt.%; nano-silica particle size is 15 nm;

[0117] Fluorosilane-modified nano-silica sol D: SiO2 content is 15 wt.%; nano-silica particle size is 15 nm;

[0118] The fluorosilane-modified nano-silica sol in this application is a material obtained by grafting fluorosilane onto silica. It is commercially available or prepared using conventional methods in the art.

[0119] Silica sol E: Nano silica sol 081; Kaihua Longbang Silica Sol Factory.

[0120] Fluorosilicone oils: vinyl fluorosilicone oil, methyl fluorosilicone oil, hydroxyl fluorosilicone oil, hydrogen-containing perfluorosilicone oil; commercially available.

[0121] Perfluorinated compounds: 1H,1H,2H-perfluoro-1-decane, perfluoropolyether, perfluorohexadecane, perfluorohexadecane; commercially available.

[0122] Metal catalysts: Platinum catalyst PT-5000.

[0123] Silane coupling agents: Silane coupling agents KH-602, KH-520, KH-570, HD-520; commercially available.

[0124] Solvents: n-octane, n-hexane; commercially available.

[0125] Example 1

[0126] This example provides a coating composition, the composition of which is shown in Table 1 by mass percentage.

[0127] Table 1

[0128] The preparation method of the coating is as follows:

[0129] S1. Fluorosilane-modified nano silica sol A, vinyl fluorosilicone oil, and 1H,1H,2H-perfluoro-1-decane are mixed and stirred until homogeneous to obtain a first mixture. The first mixture is poured into a three-necked flask, and 10 wt.% of a metal catalyst (calculated based on the total mass of the first mixture) is added. The mixture is then heated to 70 degrees Celsius and kept at that temperature for 4 hours with continuous stirring. After the reaction is complete, the mixture is filtered through a 200-mesh filter to remove particulate impurities from the bottom, yielding a fluorosilicone resin.

[0130] S2, the silicone fluoropolymer prepared by S1, KH-602 and n-octane are mixed and stirred evenly to obtain the final product.

[0131] Example 2

[0132] This example provides a coating composition, the composition of which is shown in Table 2 by weight percentage.

[0133] Table 2

[0134] The preparation method of the coating is as follows:

[0135] S1. Fluorosilane-modified nano silica sol A, vinyl fluorosilicone oil, and 1H,1H,2H-perfluoro-1-decane are mixed and stirred until homogeneous to obtain a first mixture. The first mixture is poured into a three-necked flask, and 10 wt.% of a metal catalyst (calculated based on the total mass of the first mixture) is added. The mixture is then heated to 70 degrees Celsius and kept at that temperature for 4 hours with continuous stirring. After the reaction is complete, the mixture is filtered through a 200-mesh filter to remove particulate impurities from the bottom, yielding a fluorosilicone resin.

[0136] S2, the silicone fluoropolymer obtained from S1, KH-520 and n-hexane are mixed and stirred evenly to obtain the final product.

[0137] Example 3

[0138] This example provides a coating composition, the composition of which is shown in Table 3 by weight percentage.

[0139] Table 3

[0140] The preparation method of the coating is as follows:

[0141] S1. Fluorosilane-modified nano silica sol A, hydroxyl fluorosilicone oil and perfluoropolyether are mixed and stirred evenly to obtain a first mixture; the first mixture is poured into a three-necked flask, 10 wt.% of a metal catalyst is added (calculated based on the total mass of the first mixture), and then the temperature is raised to 70 degrees Celsius and kept at that temperature for 4 hours, with constant stirring during the process. After the reaction is completed, the mixture is filtered through a 200-mesh filter to remove particulate impurities at the bottom, and a silicone fluororesin is obtained.

[0142] S2, the silicone fluoropolymer prepared by S1, KH-570 and n-hexane are mixed and stirred evenly to obtain the final product.

[0143] Example 4

[0144] This example provides a coating composition, the composition of which is shown in Table 4 by weight percentage.

[0145] Table 4

[0146] The preparation method of the coating is as follows:

[0147] S1. Fluorosilane-modified nano silica sol A, hydrogen-containing perfluorosilicone oil, and perfluorohexadecyl ether are mixed and stirred evenly to obtain a first mixture. The first mixture is poured into a three-necked flask, and 10 wt.% of a metal catalyst (calculated based on the total mass of the first mixture) is added. The mixture is then heated to 70 degrees Celsius and kept at that temperature for 4 hours with constant stirring. After the reaction is complete, the mixture is filtered through a 200-mesh filter to remove particulate impurities from the bottom, yielding a fluorosilicone resin.

[0148] S2, the silicone fluoropolymer obtained from S1, CG-605 and fluoroether are mixed and stirred evenly to obtain the final product.

[0149] Example 5

[0150] This example provides a coating composition, the composition of which is shown in Table 5 by weight percentage.

[0151] Table 5

[0152] The preparation method of the coating is as follows:

[0153] S1. Fluorosilane-modified nano silica sol A, methyl fluorosilicone oil and perfluorohexadecane are mixed and stirred evenly to obtain a first mixture; the first mixture is poured into a three-necked flask, 10 wt.% of a metal catalyst (calculated based on the total mass of the first mixture) is added, and then the temperature is raised to 70 degrees Celsius and kept at that temperature for 4 hours, with continuous stirring during the process. After the reaction is completed, the mixture is filtered through a 200-mesh filter to remove particulate impurities at the bottom, and a fluorosilicone resin is obtained.

[0154] S2, the silicone fluoropolymer obtained from S1, HD-520 and n-octane are mixed and stirred evenly to obtain the final product.

[0155] Example 6

[0156] This example provides a coating composition with the same component content as in Example 2, except that fluorosilane-modified nano-silica sol B is used instead of fluorosilane-modified nano-silica sol A.

[0157] Example 7

[0158] This example provides a coating composition with the same component content as in Example 2, except that fluorosilane-modified nano-silica sol C is used instead of fluorosilane-modified nano-silica sol A.

[0159] Example 8

[0160] This example provides a coating composition with the same component content as in Example 2, except that fluorosilane-modified nano-silica sol D is used instead of fluorosilane-modified nano-silica sol A.

[0161] Example 9

[0162] This example provides a coating composition with the same component content as in Example 2, except that the amount of silicone fluoropolymer is 10% and the amount of solvent is 88%.

[0163] Example 10

[0164] This example provides a coating composition with the same component content as in Example 2, except that the amount of silicone fluoropolymer is 0.01% and the amount of solvent is 97.99%.

[0165] Comparative Example 1

[0166] This example provides a coating composition with the same component content as in Example 2, except that the raw materials in the silicone fluororesin do not contain perfluorinated compounds and consist of 32% fluorosilane-modified nano silica sol and 68% vinyl fluorosilicone oil.

[0167] Comparative Example 2

[0168] This example provides a coating composition with the same component content as in Example 2, except that silica sol E is used instead of fluorosilane-modified nano silica sol A.

[0169] Comparative Example 3

[0170] This example provides a coating composition with the same component content as in Example 2, except that it does not contain vinyl fluorosilicone oil. It consists of 20% fluorosilane-modified nano-silica sol A and 80% 1H,1H,2H-perfluoro-1-decane.

[0171] Performance testing

[0172] The coatings from Examples 1-10 and Comparative Examples 1-3 were prepared into coatings using the following specific processes:

[0173] 1. Wipe the surface of the glass plate with a cotton cloth soaked in ethanol, and after the surface dries, treat the surface with plasma to obtain a pretreated glass panel.

[0174] 2. Pour the coatings prepared in the examples and comparative examples into the spray guns and spray them evenly onto the surface of the pretreated glass panel. Place the sprayed glass panel in a 140°C oven and keep it warm for 60 minutes. After removing it and cooling it to room temperature, the coating (thickness is 100nm±20) is obtained.

[0175] The prepared coating was subjected to the following tests: the test results are shown in Table 6.

[0176] Water contact angle test: The test was conducted using a fully automatic water contact angle tester.

[0177] Abrasion resistance test: Wet abrasion was performed 50,000 times with a 1.5kg load, and then the water contact angle was tested.

[0178] High temperature resistance: The water contact angle was tested after the coating was placed in an environment of 250℃ for 144 hours.

[0179] Table 6

[0180] As shown in Table 6, the coatings prepared from the paint compositions of Examples 1-10 have a water contact angle >101° and are easy to clean. After abrasion resistance testing, the attenuation of the water contact angle is within 3.4°, indicating excellent abrasion resistance. After being subjected to a high-temperature environment of 250°C for 144 hours, the attenuation of the water contact angle of the coating is controlled within 3.7°.

[0181] Based on the data from Comparative Example 1, when the raw materials in the silicone fluoropolymer lack perfluorinated compounds, the coating prepared from the coating composition of Comparative Example 1 exhibits poor water contact angle performance, as well as poor abrasion resistance and high-temperature resistance.

[0182] Based on the data from Comparative Example 2, when silica sol E was used to replace fluorosilane-modified nano silica sol A in the raw material of the fluorosilicone resin, the coating prepared by the coating composition of Comparative Example 2 had poor water contact angle performance, poor wear resistance, and poor high temperature resistance.

[0183] Based on the data from Comparative Example 3, when the raw materials in the silicone resin do not contain vinyl fluorosilicone oil, the coating prepared from the coating composition of Comparative Example 3 has poor water contact angle performance, as well as poor abrasion resistance and high temperature resistance.

[0184] In summary, the fluorosilane-modified nano-silica sol, fluorosilicone oil, and perfluorinated compounds used in this application to prepare a fluorosilicone resin exhibit high-temperature resistance and hydrophobic properties. The coating formed by combining the resin with a silane coupling agent demonstrates high adhesion to the substrate, high density, and good wear resistance and high-temperature resistance. The prepared fluorosilicone resin, combined with a silane coupling agent and solvent, forms a coating that, when applied to a glass substrate, provides high-temperature resistance, wear resistance, and easy cleaning.

[0185] The embodiments of this application have been described in detail above, but this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A coating composition comprising a fluorosilicone resin, a silane coupling agent, and a solvent, wherein the raw materials for preparing the fluorosilicone resin include fluorosilane-modified nano-silica sol, fluorosilicone oil, and perfluorinated compounds.

2. The coating composition according to claim 1, wherein, The raw materials for preparing the silicone fluoropolymer resin include 1 wt.% to 60 wt.% fluorosilane-modified nano silica sol, 20 wt.% to 75 wt.% fluorosilicone oil, and 20 wt.% to 90 wt.% perfluorinated compound; the sum of the percentages of each raw material in the silicone fluoropolymer resin is 100 wt.%.

3. The coating composition according to claim 1 or 2, wherein, The amount of the silicone fluoropolymer used is 0.01 wt.% to 50 wt.%, calculated based on the total mass of the silicone fluoropolymer, silane coupling agent, and solvent.

4. The coating composition according to any one of claims 1 to 3, wherein, The amount of the silicone fluoropolymer used is 0.01 wt.% to 10 wt.%, calculated based on the total mass of the silicone fluoropolymer, silane coupling agent, and solvent.

5. The coating composition according to any one of claims 1 to 4, wherein, The amount of the silane coupling agent used is 0.01 wt.% to 30 wt.%, calculated based on the total mass of the silicone fluoropolymer, silane coupling agent, and solvent.

6. The coating composition according to any one of claims 1 to 5, wherein, The silane coupling agent includes at least one of the following: silane coupling agent KH-602, silane coupling agent SI-69, silane coupling agent KH-702, silane coupling agent CG-171, silane coupling agent AC-62, silane coupling agent HD-561, silane coupling agent CG-608, silane coupling agent HD-520, silane coupling agent KH-570, silane coupling agent CG-605, silane coupling agent 1706, silane coupling agent HD-602, silane coupling agent KH-580, silane coupling agent CG-301, or silane coupling agent KH-902.

7. The coating composition according to any one of claims 1 to 6, wherein, The amount of solvent used is 20 wt.% to 96 wt.% based on the total mass of the silicone fluoropolymer, silane coupling agent, and solvent.

8. The coating composition according to any one of claims 1 to 7, wherein, The silica content in the fluorosilane-modified nano-silica sol is 5 wt.% to 60 wt.%.

9. The coating composition according to any one of claims 1 to 8, wherein, The solvent includes at least one of alkane solvents, ether solvents, ketone solvents, or benzene-derived biological solvents.

10. The coating composition according to any one of claims 1 to 9, wherein, The particle size of the nano-silica in the fluorosilane-modified nano-silica sol is 1-1000 nm.

11. The coating composition according to any one of claims 1 to 10, wherein, The fluorosilicone oil includes at least one of methyl fluorosilicone oil, vinyl fluorosilicone oil, perfluorosilicone oil, vinyl epoxy fluorosilicone oil, hydroxyl fluorosilicone oil, copolymer methyl fluorosilicone oil, hydrofluoricone oil, or copolymer hydroxyl fluorosilicone oil.

12. The coating composition according to any one of claims 1 to 11, wherein, The perfluorinated compound includes at least one of perfluorinated polyether, 1H,1H,2H-perfluoro-1-decane, perfluorododecane, perfluorohexadecyl alcohol, perfluorohexadecane, brominated perfluorododecane, perfluorododecyl ether, perfluorohexadecyl ether, perfluoroalkyl polyether, perfluoroalkyl propanol, or perfluorododecyl ethylene.

13. The coating composition according to any one of claims 1 to 12, wherein, The silicone-fluoropolymer resin is prepared by the following method: The product is obtained by mixing and heating a mixture of fluorosilane-modified nano-silica sol, fluorosilicone oil, perfluorinated compound and metal catalyst.

14. A method for preparing the coating composition according to any one of claims 1 to 13, wherein, The components of the coating composition are mixed to obtain the coating composition.

15. A coating comprising the coating composition according to any one of claims 1 to 13.

16. A method for preparing a coating, comprising: The coating composition according to any one of claims 1 to 13 is obtained by applying it to the surface of a substrate and then heat-treating it.

17. The method for preparing the coating according to claim 16, wherein, The heat treatment temperature is 100–160°C.

18. The method for preparing the coating according to claim 16 or 17, wherein, Prior to preparation, the substrate is subjected to plasma treatment.

19. A household appliance having at least a portion of its surface coated with the coating of claim 15.

20. The household appliance according to claim 19, including a range hood, a cooktop, a dishwasher, a microwave oven, or an oven.

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