Coating composition as well as preparation method and application thereof

Abstract

The invention discloses a coating composition as well as a preparation method and application thereof. Belongs to the technical field of coatings. The coating composition comprises silicon-fluorine resin, a silane coupling agent and a solvent, the silicon-fluorine resin is prepared from the following raw materials: fluorosilane modified nano silica sol, fluorosilicone oil and a perfluorinated compound. The silicon-fluorine resin prepared by taking the fluorosilane modified nano silica sol, the fluorosilicone oil and the perfluorinated compound as raw materials is matched with the silane coupling agent and the solvent to form the coating, and a coating layer formed by the coating has the effects of high temperature resistance, wear resistance and easiness in cleaning.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, and in particular to a coating composition and a preparation method and application thereof. Background Art

[0002] With the development of economy and the improvement of living standards, people have higher and higher requirements for household appliances, especially for kitchen appliances that are in contact with various oils, seasonings, acids and alkalis for a long time and at a high frequency. For example, gas stoves and range hoods are in high and low temperature and heavy oil environments for a long time, and need to be cleaned irregularly and frequently. At present, the panels of gas stoves and range hoods are mostly glass panels, which are difficult to clean after oil stains adhere to them. The relevant technology is to apply a layer of easy-to-clean coating on the glass surface. However, the existing easy-to-clean coating technology has not yet reached the level expected by the market. Some products on the market have poor stability, and the oleophobic effect will gradually be lost during use. There will also be problems such as the coating being not resistant to high temperatures and having poor wear resistance.

[0003] Therefore, it is necessary to develop a coating composition that is resistant to high temperatures, wear-resistant and easy to clean. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the first aspect of the present invention provides a coating composition, and the coating prepared by the coating composition has the effects of high temperature resistance, wear resistance and easy cleaning.

[0005] The second aspect of the present invention also provides a method for preparing the coating composition.

[0006] The third aspect of the present invention also provides a coating.

[0007] The fourth aspect of the present invention also provides a method for preparing a coating.

[0008] A fifth aspect of the present invention also provides a household appliance.

[0009] According to the first aspect of the present invention, a coating composition is provided, comprising a silicone fluorine resin, a silane coupling agent and a solvent;

[0010] The raw materials for preparing the silicone-fluororesin include fluorosilane-modified nano-silica sol, fluorosilicone oil and perfluorinated compounds.

[0011] The coating composition according to the embodiment of the present invention has at least the following beneficial effects:

[0012] The coating is formed by using a silicone fluorine resin prepared from fluorosilane-modified nano-silica sol, fluorosilicone oil and perfluoro compounds as raw materials, and a silane coupling agent and a solvent. The formed coating has the effects of high temperature resistance, wear resistance and easy cleaning.

[0013] This is because the silicone fluorine resin prepared from fluorosilane-modified nano-silica sol, fluorosilicone oil and perfluorinated compounds used in the present invention has high temperature resistance and hydrophobicity, and the coating formed by combining with a silane coupling agent has a high bonding force to the substrate, high density, good wear resistance and high temperature resistance.

[0014] According to one embodiment of the present invention, the raw materials for preparing the silicone fluororesin include 1wt.% to 60wt.% of fluorosilane-modified nano-silica sol, 20wt.% to 75wt.% of fluorosilicone oil and 20wt.% to 90wt.% of perfluoro compound; the sum of the percentages of each raw material in the silicone fluororesin is 100wt.%.

[0015] According to one embodiment of the present invention, the amount of the silicone fluorine resin is 0.01wt.% to 50wt.%, calculated based on the total mass of the silicone fluorine resin, the silane coupling agent and the solvent, including any numerical value and all ranges and any sub-ranges therein. For example, including 0.01wt.%, 0.1wt.%, 1wt.%, 5wt.%, 10wt.%, 30wt.% and 50wt.%.

[0016] According to one embodiment of the present invention, the amount of the silicone fluororesin is 0.01wt.% to 10wt.%, calculated based on the total mass of the silicone fluororesin, the silane coupling agent and the solvent. Including any numerical value and all ranges and any sub-ranges therein. For example, including 0.01wt.%, 0.1wt.%, 1wt.%, 2wt.%, 2.5wt.%, 4.5wt.%, 6wt.% and 10wt.%. Therefore, when the amount of the silicone fluororesin is within the above range, as a film-forming substance of the coating, it provides hydrophobic and oleophobic effects, as well as high temperature resistance and wear resistance.

[0017] According to one embodiment of the present invention, the amount of the silane coupling agent is 0.01wt.% to 30wt.%, calculated based on the total mass of the silicone fluorine resin, the silane coupling agent and the solvent, including any numerical value and all ranges and any sub-ranges therein. For example, including 0.01wt.%, 0.1wt.%, 1wt.%, 5wt.%, 10wt.% and 30wt.%.

[0018] According to one embodiment of the present invention, the amount of the silane coupling agent is 0.1wt.% to 15wt.%, calculated based on the total mass of the silicone fluorine resin, the silane coupling agent and the solvent, including any numerical value and all ranges and any sub-ranges therein. For example, including 0.1wt.%, 1wt.%, 5wt.%, 10wt.% and 15wt.%. Therefore, when the amount of the silane coupling agent is within the above range, the prepared coating has good leveling performance and good bonding with the substrate.

[0019] According to one embodiment of the present invention, the amount of the solvent is 20wt.% to 96wt.%, calculated based on the total mass of the silicone fluorine resin, the silane coupling agent and the solvent, including any numerical value and all ranges and any sub-ranges therein. For example, including 20wt.%, 30wt.%, 40wt.%, 50wt.%, 65wt.%, 70wt.%, 80wt.%, 85wt.% and 96wt.%.

[0020] According to one embodiment of the present invention, the amount of the solvent is 65wt.% to 95wt.%, calculated based on the total mass of the silicone fluorine resin, the silane coupling agent and the solvent, including any numerical value and all ranges and any sub-ranges therein, such as 65wt.%, 70wt.%, 75wt.%, 80wt.% and 95wt.%.

[0021] According to one embodiment of the present invention, the silicon dioxide content in the fluorosilane-modified nano-silica sol is 5wt.% to 60wt.%, including any numerical value and all ranges and any sub-ranges therein, such as 5wt.%, 10wt.%, 15wt.%, 20wt.%, 25wt.%, 30wt.%, 35wt.%, 40wt.%, 50wt.% and 60wt.%.

[0022] According to one embodiment of the present invention, the silicon dioxide content in the fluorosilane-modified nano-silica sol is 15wt.% to 35wt.%, including any numerical value and all ranges and any sub-ranges therein. For example, it includes 15wt.%, 25wt.%, 30wt.%, and 35wt.%. Therefore, when the amount of the fluorosilane-modified nano-silica sol is within the above range, the prepared silicone fluorine resin has a better viscosity.

[0023] According to one embodiment of the present invention, the particle size of the nano-silica in the fluorosilane-modified nano-silica sol is 1 to 1000 nm, including any numerical value, all ranges and any sub-ranges therein, such as 1 nm, 15 nm, 50 nm, 100 nm, 200 nm, 300 nm, 500 nm, 600 nm, 800 nm, 900 nm and 1000 nm.

[0024] According to one embodiment of the present invention, the fluorosilicone oil includes at least one of methyl fluorosilicone oil, vinyl fluorosilicone oil, hydroxy fluorosilicone oil, perfluorosilicone oil, vinyl epoxy fluorosilicone oil, copolymerized methyl fluorosilicone oil, hydrogen-containing fluorosilicone oil or copolymerized hydroxy fluorosilicone oil.

[0025] According to one embodiment of the present invention, the perfluorinated compound includes at least one of perfluoropolyether, 1H,1H,2H-perfluoro-1-decane, perfluorododecane, perfluorohexadecanol, perfluorohexadecane, brominated perfluorododecane, perfluorododecane, perfluorohexadecane, perfluoroalkyl polyether, perfluoroalkyl propanol or perfluorododecylethylene.

[0026] According to an embodiment of the present invention, there is no requirement for the type of the silane coupling agent, as long as it can achieve the function of the silane coupling agent, for example, it includes at least one of 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.

[0027] According to an embodiment of the present invention, the solvent includes one of an alkane solvent, an ether solvent, a ketone solvent or a benzene-derived biological solvent.

[0028] According to an embodiment of the present invention, the alkane solvent is selected from at least one of n-hexane, n-octane, n-decane, ethylene dichloride, and mineral oil (CAS No. 8042-47-5).

[0029] According to an embodiment of the present invention, the ether solvent is selected from at least one of diethyl ether, petroleum ether, dibutyl ether or fluoroether.

[0030] According to an embodiment of the present invention, the ketone solvent is selected from at least one of acetone, methyl ethyl ketone or cyclohexanone.

[0031] According to one embodiment of the present invention, a metal catalyst is also added during the preparation of the silicone fluororesin.

[0032] According to an embodiment of the present invention, the amount of the metal catalyst is 1 wt.% to 20 wt.% calculated based on the total mass of the fluorosilane-modified nano-silica sol, fluorosilicone oil and perfluorinated compound.

[0033] According to one embodiment of the present invention, the metal catalyst includes at least one of an electrolytic silver catalyst, a molten iron catalyst, a platinum mesh catalyst, a platinum catalyst, and a Pt-Re / -Al2O3 catalyst.

[0034] According to one embodiment of the present invention, the silicone fluorine resin is prepared by the following method:

[0035] The fluorosilane-modified nano-silica sol, fluorosilicone oil, perfluorinated compounds and metal catalysts are mixed and heated to react to obtain the product.

[0036] According to a second aspect of the present invention, a method for preparing a coating composition is provided, the method comprising: mixing the components in the coating composition described in the first aspect of the present invention.

[0037] The method for preparing the coating composition according to the embodiment of the present invention has at least the following beneficial effects:

[0038] The preparation method of the coating composition of the present invention is simple to operate and can realize large-scale industrial production.

[0039] The third aspect of the present invention provides a coating, comprising the coating composition described in the first aspect of the present invention.

[0040] The coating according to the embodiment of the present invention has at least the following beneficial effects:

[0041] The coating provided by the present invention is obtained by coating the above coating composition, and therefore also has the technical effects of the coating described above. The present invention applies the above coating on a substrate to form a coating that is resistant to high temperature, wear-resistant and easy to clean.

[0042] According to an embodiment of the present invention, the coating further comprises a substrate.

[0043] According to an embodiment of the present invention, the substrate includes at least one of a glass substrate, a metal substrate, a ceramic substrate or an enamel substrate.

[0044] According to one embodiment of the present invention, the substrate further includes a pretreatment.

[0045] According to an embodiment of the present invention, the pretreatment includes removing impurities from the surface of the substrate and then subjecting the substrate to plasma treatment, so that the pretreated glass substrate has better bonding strength with the coating of the present invention.

[0046] According to one embodiment of the present invention, the thickness of the coating is 1 to 2000 nm, including any value and all ranges and any sub-ranges therein, such as 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.

[0047] A fourth aspect of the present invention provides a method for preparing a coating, comprising the following steps:

[0048] The coating composition described in the first aspect of the present invention is coated on the surface of a substrate and then subjected to heat treatment to obtain the coating composition.

[0049] The method for preparing the coating according to the embodiment of the present invention has at least the following beneficial effects:

[0050] The preparation method of the coating of the present invention is simple to operate and can be obtained through heat treatment, thereby enabling large-scale industrial production.

[0051] According to an embodiment of the present invention, the temperature of the heat treatment is 100-160°C, including any numerical value and all ranges and any sub-ranges therein, for example, including 100°C, 110°C, 120°C, 130°C, 140°C, 150°C or 160°C.

[0052] According to an embodiment of the present invention, the heat treatment time is 30 to 180 minutes, including any numerical value and all ranges and any sub-ranges therein, such as 30 minutes, 60 minutes, 90 minutes, 120 minutes, 150 minutes or 180 minutes.

[0053] A fifth aspect of the present invention provides a household appliance, at least a portion of the surface of the household appliance is coated with the coating described in the third aspect of the present invention.

[0054] The household appliance according to the embodiment of the present invention has at least the following beneficial effects:

[0055] The household appliance provided by the present invention is coated with the coating described in the third aspect of the present invention on its surface. Therefore, it also has the technical effects of the coating described above. The surface coating of the kitchen appliance of the present invention has the effects of high temperature resistance, wear resistance and easy cleaning.

[0056] According to one embodiment of the present invention, the household appliance includes a range hood, a stove, a dishwasher, a microwave oven or an oven.

[0057] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention. DETAILED DESCRIPTION

[0058] The following will be combined with the embodiments to clearly and completely describe the concept of the present invention and the technical effects produced, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0059] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0060] In some embodiments of the present invention, there is provided a method comprising a silicone fluorine resin, a silane coupling agent and a solvent;

[0061] The raw materials for preparing the silicone-fluororesin include fluorosilane-modified nano-silica sol, fluorosilicone oil and perfluorinated compounds.

[0062] It can be understood that the silicone fluorine resin prepared by the present invention using fluorosilane-modified nano-silica sol, fluorosilicone oil and perfluoro compounds as raw materials is matched with a silane coupling agent and a solvent to form a coating, and the coating formed by the coating has the effects of high temperature resistance, wear resistance and easy cleaning.

[0063] Furthermore, the silicone fluorine resin prepared from fluorosilane-modified nano-silica sol, fluorosilicone oil and perfluoro compounds used in the present invention has high temperature resistance and hydrophobicity, and the coating formed by combining with a silane coupling agent has high bonding force to the substrate, high density and good wear resistance.

[0064] In some embodiments of the present invention, the raw materials for preparing the silicone fluororesin include 1wt.% to 60wt.% of fluorosilane-modified nano-silica sol, 20wt.% to 75wt.% of fluorosilicone oil and 20wt.% to 90wt.% of perfluoro compound; the sum of the percentages of each raw material in the silicone fluororesin is 100wt.%.

[0065] In some embodiments of the present invention, the amount of the silicone fluorine resin is 0.01wt.% to 50wt.%, calculated based on the total mass of the silicone fluorine resin, the silane coupling agent and the solvent, including any numerical value and all ranges and any sub-ranges therein, such as 0.01wt.%, 0.1wt.%, 1wt.%, 5wt.%, 10wt.%, 30wt.% and 50wt.%.

[0066] In some embodiments of the present invention, the amount of the silicone fluororesin is 0.01wt.% to 10wt.%, calculated based on the total mass of the silicone fluororesin, the silane coupling agent and the solvent. Any numerical value, all ranges and any sub-ranges thereof are included. For example, 0.01wt.%, 0.1wt.%, 1wt.%, 2wt.%, 2.5wt.%, 4.5wt.%, 6wt.% and 10wt.% are included. Thus, when the amount of the silicone fluororesin is within the above range, it acts as a film-forming substance of the coating, providing hydrophobic and oleophobic effects, as well as high temperature resistance and wear resistance.

[0067] In some embodiments of the present invention, the amount of the silane coupling agent is 0.01wt.% to 30wt.%, calculated based on the total mass of the silicone fluorine resin, the silane coupling agent and the solvent, including any numerical value and all ranges and any sub-ranges therein, such as 0.01wt.%, 0.1wt.%, 1wt.%, 5wt.%, 10wt.% and 30wt.%.

[0068] In some embodiments of the present invention, the amount of the silane coupling agent is 0.1wt.% to 15wt.%, calculated based on the total mass of the silicone fluorine resin, the silane coupling agent and the solvent, including any numerical value and all ranges and any sub-ranges therein. For example, including 0.1wt.%, 1wt.%, 5wt.%, 10wt.% and 15wt.%. Therefore, when the amount of the silane coupling agent is within the above range, the prepared coating has good leveling performance and good bonding with the substrate.

[0069] In some embodiments of the present invention, the amount of the solvent is 20wt.% to 96wt.%, calculated based on the total mass of the silicone fluorine resin, the silane coupling agent and the solvent, including any numerical value and all ranges and any sub-ranges therein, such as 20wt.%, 30wt.%, 40wt.%, 50wt.%, 65wt.%, 70wt.%, 80wt.%, 85wt.% and 96wt.%.

[0070] In some embodiments of the present invention, the amount of the solvent is 65wt.% to 95wt.%, calculated based on the total mass of the silicone fluorine resin, the silane coupling agent and the solvent, including any numerical value and all ranges and any sub-ranges therein, such as 65wt.%, 70wt.%, 75wt.%, 80wt.% and 95wt.%.

[0071] In some embodiments of the present invention, the silicon dioxide content in the fluorosilane-modified nano-silica sol is 5wt.% to 60wt.%, including any value and all ranges and any sub-ranges therein, such as 5wt.%, 10wt.%, 15wt.%, 20wt.%, 25wt.%, 30wt.%, 35wt.%, 40wt.%, 50wt.% and 60wt.%.

[0072] In some embodiments of the present invention, the silicon dioxide content in the fluorosilane-modified nano-silica sol is 15wt.% to 35wt.%, including any numerical value and all ranges and any sub-ranges therein. For example, it includes 15wt.%, 25wt.%, 30wt.%, and 35wt.%. Therefore, when the amount of the fluorosilane-modified nano-silica sol is within the above range, the prepared silicone fluorine resin has a good viscosity.

[0073] In some embodiments of the present invention, the particle size of the nano-silica in the fluorosilane-modified nano-silica sol is 1 to 1000 nm, including any numerical value, all ranges and any sub-ranges therein, such as 1 nm, 15 nm, 50 nm, 100 nm, 200 nm, 300 nm, 500 nm, 600 nm, 800 nm, 900 nm and 1000 nm.

[0074] In some embodiments of the present invention, the fluorosilicone oil includes at least one of methyl fluorosilicone oil, vinyl fluorosilicone oil, hydroxy fluorosilicone oil, perfluorosilicone oil, vinyl epoxy fluorosilicone oil, copolymerized methyl fluorosilicone oil, hydrogen-containing fluorosilicone oil or copolymerized hydroxy fluorosilicone oil.

[0075] In some embodiments of the present invention, the perfluorinated compound includes at least one of perfluoropolyether, 1H,1H,2H-perfluoro-1-decane, perfluorododecane, perfluorohexadecanol, perfluorohexadecane, brominated perfluorododecane, perfluorododecane, perfluorohexadecane, perfluoroalkyl polyether, perfluoroalkyl propanol or perfluorododecylethylene.

[0076] In some embodiments of the present invention, there is no requirement for the type of the silane coupling agent, as long as it can achieve the function of the silane coupling agent, for example, it includes at least one of 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.

[0077] In some embodiments of the present invention, the solvent includes one of an alkane solvent, an ether solvent, a ketone solvent or a benzene-derived biological solvent.

[0078] In some embodiments of the present invention, the alkane solvent is selected from at least one of n-hexane, n-octane, n-decane, ethylene dichloride and mineral oil (CAS No. 8042-47-5).

[0079] In some embodiments of the present invention, the ether solvent is selected from at least one of diethyl ether, petroleum ether, dibutyl ether or fluoroether.

[0080] In some embodiments of the present invention, the ketone solvent is selected from at least one of acetone, methyl ethyl ketone or cyclohexanone.

[0081] In some embodiments of the present invention, a metal catalyst is added during the preparation of the silicone-fluororesin.

[0082] In some embodiments of the present invention, the amount of the metal catalyst is 1wt.% to 20wt.% of the total mass, calculated based on the total mass of the fluorosilane-modified nano-silica sol, fluorosilicone oil and perfluorinated compound, including any numerical value and all ranges and any sub-ranges therein, such as 1wt.%, 5wt.%, 10wt.%, 15wt.% or 20wt.%.

[0083] In some embodiments of the present invention, the metal catalyst includes at least one of an electrolytic silver catalyst, a molten iron catalyst, a platinum mesh catalyst, a platinum catalyst, and a Pt-Re / -Al2O3 catalyst.

[0084] In some embodiments of the present invention, the silicone fluorine resin is prepared by the following method:

[0085] The fluorosilane-modified nano-silica sol, fluorosilicone oil, perfluorinated compounds and metal catalysts are mixed and heated to react to obtain the product.

[0086] In some embodiments of the present invention, a method for preparing a coating composition is provided, the method comprising: mixing the components in the coating composition described in the first aspect of the present invention.

[0087] It can be understood that the preparation method of the coating composition of the present invention is simple to operate and can realize large-scale industrial production.

[0088] In some embodiments of the present invention, a coating is provided, comprising the coating composition described in the first aspect of the present invention.

[0089] It is understood that the coating provided by the present invention is obtained by coating the aforementioned coating composition, and therefore, also has the technical effects of the coating described above. The present invention applies the aforementioned coating on a substrate to form a coating that has the effects of high temperature resistance, wear resistance and easy cleaning.

[0090] In some embodiments of the present invention, the coating further comprises a substrate.

[0091] In some embodiments of the present invention, the substrate includes at least one of a glass substrate, a metal substrate, a ceramic substrate or an enamel substrate.

[0092] In some embodiments of the present invention, the substrate further comprises a pre-treatment.

[0093] In some embodiments of the present invention, the pretreatment includes removing impurities from the surface of the substrate and then subjecting the substrate to plasma treatment, so that the pretreated glass substrate has better bonding strength with the coating of the present invention.

[0094] In some embodiments of the present invention, the thickness of the coating is 1 to 2000 nm, including any value and all ranges and any sub-ranges therein, such as 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.

[0095] In some embodiments of the present invention, a method for preparing a coating is provided, comprising the following steps:

[0096] The coating composition described in the first aspect of the present invention is coated on the surface of a substrate and then subjected to heat treatment to obtain the coating composition.

[0097] It can be understood that the method for preparing the coating of the present invention is simple to operate, can be obtained through heat treatment, and can realize large-scale industrial production.

[0098] In some embodiments of the present invention, the temperature of the heat treatment is 100-160°C, including any numerical value and all ranges and any sub-ranges therein, for example, including 100°C, 110°C, 120°C, 130°C, 140°C, 150°C or 160°C.

[0099] In some embodiments of the present invention, the heat treatment time is 30 to 180 minutes, including any numerical value and all ranges and any sub-ranges therein, for example, including 30 minutes, 60 minutes, 90 minutes, 120 minutes, 150 minutes or 180 minutes.

[0100] In some embodiments of the present invention, the coating method includes but is not limited to one or a combination of two or more of spray coating, spin coating, flow coating, dip coating, and roller coating.

[0101] In some embodiments of the present invention, a household appliance is provided, at least a portion of the surface of the household appliance is coated with the coating described in the fourth aspect of the present invention.

[0102] It is understandable that the surface of the household appliance provided by the present invention is coated with the coating described in the third aspect of the present invention. Therefore, it also has the technical effects of the coating described above. The surface coating of the household appliance of the present invention has the effects of high temperature resistance, wear resistance and easy cleaning.

[0103] In some embodiments of the present invention, the household appliance includes a range hood, a stove, a dishwasher, a microwave oven or an oven.

[0104] In some embodiments of the present invention, 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 maintained at this temperature for 144 hours, and then its water contact angle is tested. If the water contact angle is lower than 90°, it is determined that the temperature resistance is lost. The higher the temperature, the better the high temperature resistance of the coating.

[0105] In some embodiments of the present invention, the water contact angle of the coating formed from the coating composition of the present invention is greater than 101°.

[0106] In some embodiments of the present invention, the attenuation degree of the water contact angle of the coating formed by the coating composition of the present invention after being heated to 250° C. and maintained at the temperature for 144 hours is ≤3.7°.

[0107] In some embodiments of the present invention, the wear resistance of the coating is determined by a water contact angle method, that is, the prepared coating is wet-ground 50,000 times with a load of 1.5 kg and then the water contact angle is tested to check the attenuation of the water contact angle before and after the wear test. The lower the attenuation, the better the wear resistance.

[0108] In some embodiments of the present invention, the coating formed by the coating composition of the present invention has a water contact angle attenuation of ≤3.4° after 50,000 wet grindings with a load of 1.5 kg.

[0109] Further, some of the raw materials used in the examples and comparative examples of the present invention are as follows:

[0110] Fluorosilane modified nano-silica sol A: SiO2 content is 30wt.%; the particle size of nano-silica is 15nm;

[0111] Fluorosilane modified nano-silica sol B: SiO2 content is 25wt.%; the particle size of nano-silica is 15nm;

[0112] Fluorosilane modified nano-silica sol C: SiO2 content is 35wt.%; the particle size of nano-silica is 15nm;

[0113] Fluorosilane modified nano-silica sol D: SiO2 content is 15wt.%; the particle size of nano-silica is 15nm;

[0114] The fluorosilane-modified nano-silica sol in the present invention is a material obtained by grafting and modifying silicon dioxide with fluorosilane, and can be purchased from the market or prepared by conventional methods in the art.

[0115] Silica sol E: Nano silica sol 081; Kaihua Longbang Silica Sol Factory.

[0116] Fluorosilicone oil: vinyl fluorosilicone oil, methyl fluorosilicone oil, hydroxy fluorosilicone oil, hydrogenated perfluorosilicone oil; commercially available.

[0117] Perfluorinated compounds: 1H,1H,2H-perfluoro-1-decane, perfluoropolyether, perfluorohexadecane, perfluorohexadecane; commercially available.

[0118] Metal catalyst: Platinum catalyst PT-5000.

[0119] Silane coupling agent: Silane coupling agent KH-602, KH-520, KH-570, HD-520; commercially available.

[0120] Solvent: n-octane, n-hexane; commercially available.

[0121] Example 1

[0122] This example provides a coating composition, and the composition of each component is calculated by mass percentage. The composition of the coating composition is shown in Table 1.

[0123] Table 1

[0124]

[0125] The coating preparation method is as follows:

[0126] S1. Mix fluorosilane-modified nano-silica sol A, vinyl fluorosilicone oil and 1H, 1H, 2H-perfluoro-1-decane and stir evenly to obtain a first mixed solution; pour the first mixed solution into a three-necked flask, add 10 wt.% of a metal catalyst (calculated based on the total mass of the first mixed solution), then heat to 70 degrees Celsius and keep warm for 4 hours with continuous stirring during the process. After the reaction is completed, use a 200-mesh filter to filter out the bottom particle impurities to obtain a silicone fluorine resin.

[0127] S2. Take the silicone fluororesin, KH-602 and n-octane prepared in S1 and mix them evenly.

[0128] Example 2

[0129] This example provides a coating composition, and the components are calculated by weight percentage. The composition of the coating composition is shown in Table 2.

[0130] Table 2

[0131]

[0132]

[0133] The coating preparation method is as follows:

[0134] S1. Mix fluorosilane-modified nano-silica sol A, vinyl fluorosilicone oil and 1H, 1H, 2H-perfluoro-1-decane and stir to obtain a first mixed solution; pour the first mixed solution into a three-necked flask, add 10 wt.% of a metal catalyst (calculated based on the total mass of the first mixed solution), then heat to 70 degrees Celsius and keep warm for 4 hours with continuous stirring during the process. After the reaction is completed, filter with a 200-mesh filter to remove the particulate impurities at the bottom to obtain a silicone fluorine resin.

[0135] S2. Take the silicone fluororesin, KH-520 and n-hexane prepared in S1 and mix them evenly.

[0136] Example 3

[0137] This example provides a coating composition, and the components are calculated by weight percentage. The composition of the coating composition is shown in Table 3.

[0138] Table 3

[0139]

[0140] The coating preparation method is as follows:

[0141] S1. Mix fluorosilane-modified nano-silica sol A, hydroxyl fluorosilicone oil and perfluoropolyether and stir them evenly to obtain a first mixed solution; pour the first mixed solution into a three-necked flask, add 10 wt.% of a metal catalyst (calculated based on the total mass of the first mixed solution), then heat to 70 degrees Celsius and keep warm for 4 hours with continuous stirring during the process. After the reaction is completed, filter with a 200-mesh filter to remove the bottom particle impurities to obtain a silicone fluorine resin.

[0142] S2. Take the silicone fluororesin, KH-570 and n-hexane prepared in S1 and mix them evenly.

[0143] Example 4

[0144] This example provides a coating composition, and the components are calculated by weight percentage. The composition of the coating composition is shown in Table 4.

[0145] Table 4

[0146]

[0147] The coating preparation method is as follows:

[0148] S1. Mix fluorosilane-modified nano-silica sol A, hydrogen-containing perfluorosilicone oil and perfluorohexadecene, and stir evenly to obtain a first mixed solution; pour the first mixed solution into a three-necked flask, add 10 wt.% of a metal catalyst (calculated based on the total mass of the first mixed solution), then heat to 70 degrees Celsius and keep warm for 4 hours with continuous stirring during the process. After the reaction is completed, filter with a 200-mesh filter to remove the bottom particle impurities to obtain a silicone fluorine resin.

[0149] S2. Take the silicone fluororesin, CG-605 and fluoroether prepared in S1 and mix them evenly.

[0150] Example 5

[0151] This example provides a coating composition, and the components are calculated by weight percentage. The composition of the coating composition is shown in Table 5.

[0152] Table 5

[0153]

[0154] The coating preparation method is as follows:

[0155] S1. Mix fluorosilane-modified nano-silica sol A, methylfluorosilicone oil and perfluorohexadecane and stir them evenly to obtain a first mixed solution; pour the first mixed solution into a three-necked flask, add 10 wt.% of a metal catalyst (calculated based on the total mass of the first mixed solution), then heat it to 70 degrees Celsius and keep it warm for 4 hours with continuous stirring during the process. After the reaction is completed, filter with a 200-mesh filter to remove the bottom particle impurities to obtain a silicone fluorine resin.

[0156] S2. Take the silicone fluororesin, HD-520 and n-octane prepared in S1 and mix them evenly.

[0157] Example 6

[0158] This example provides a coating composition, the contents of each component of which are the same as those of Example 2, except that fluorosilane-modified nano-silica sol B is used to replace fluorosilane-modified nano-silica sol A.

[0159] Example 7

[0160] This example provides a coating composition, the contents of each component of which are the same as those of Example 2, except that fluorosilane-modified nano-silica sol C is used to replace fluorosilane-modified nano-silica sol A.

[0161] Example 8

[0162] This example provides a coating composition, the contents of each component of which are the same as those of Example 2, except that fluorosilane-modified nano-silica sol D is used to replace fluorosilane-modified nano-silica sol A.

[0163] Example 9

[0164] This example provides a coating composition, the contents of each component are the same as those in Example 2, except that the amount of the silicone fluorine resin is 10%; the amount of the solvent is 88%.

[0165] Example 10

[0166] This example provides a coating composition, the contents of each component are the same as those in Example 2, except that the amount of the silicone fluorine resin is 0.01%; the amount of the solvent is 97.99%.

[0167] Comparative Example 1

[0168] This example provides a coating composition, the content of each component is the same as that of Example 2, the difference is that the raw material in the silicone fluororesin does not contain perfluorinated compounds, and is composed of 32% fluorosilane-modified nano-silica sol and 68% vinyl fluorosilicone oil.

[0169] Comparative Example 2

[0170] This example provides a coating composition, the content of each component is the same as that of Example 2, the difference being that silica sol E is used to replace the fluorosilane-modified nano silica sol A.

[0171] Comparative Example 3

[0172] This example provides a coating composition, the contents of each component are the same as those in Example 2, except that no vinyl fluorosilicone oil is contained. The coating composition is composed of 20% fluorosilane-modified nano-silica sol A and 80% 1H,1H,2H-perfluoro-1-decane.

[0173] Performance Testing

[0174] The coatings of Examples 1 to 10 and Comparative Examples 1 to 3 were prepared into coatings, and the specific process was as follows:

[0175] 1. Wipe the surface of the glass plate with a cotton cloth dipped in ethanol, wait for the surface to dry, and then treat the surface with plasma to obtain a pre-treated glass panel;

[0176] 2. Pour the prepared coatings of the embodiment and comparative example into a spray gun respectively, and spray them evenly onto the surface of the pretreated glass panel. Put the sprayed glass panel into a 140°C oven for 60 minutes, take it out and cool it to room temperature to obtain a coating (thickness of 100nm±20).

[0177] The prepared coating was tested as follows: The test results are shown in Table 6.

[0178] Water contact angle test: The test is carried out using a fully automatic water contact angle tester.

[0179] Abrasion test: Wet abrasion with a load of 1.5 kg for 50,000 times before testing the water contact angle.

[0180] High temperature resistance: The coating was placed in an environment of 250°C for 144 hours and then the water contact angle was tested.

[0181] Table 6

[0182]

[0183] From the data in Table 6, the water contact angle of the coating prepared by the coating composition of Examples 1 to 10 is greater than 101°, and has easy-to-clean performance. After the wear resistance test, the attenuation degree of the water contact angle is within 3.4°, indicating excellent wear resistance; after being subjected to a high temperature environment of 250°C for 144h, the attenuation degree of the water contact angle of the coating is controlled within 3.7°.

[0184] From the data of Comparative Example 1, it can be seen that when the raw materials in the silicone fluororesin lack perfluorinated compounds, the coating prepared from the coating composition of Comparative Example 1 has poor water contact angle performance, wear resistance and high temperature resistance.

[0185] From the data of Comparative Example 2, when the raw material in the silicone fluororesin is replaced by silica sol E instead of fluorosilane-modified nano silica sol A, the coating prepared from the coating composition of Comparative Example 2 has poor water contact angle performance, wear resistance and high temperature resistance.

[0186] From the data of Comparative Example 3, when the raw materials in the silicone fluororesin do not contain vinyl fluorosilicone oil, the coating prepared from the coating composition of Comparative Example 3 has poor water contact angle performance, wear resistance and high temperature resistance.

[0187] In summary, the silicone fluorine resin prepared by the fluorosilane-modified nano-silica sol, fluorosilicone oil and perfluorinated compound used in the present invention has high temperature resistance and hydrophobicity, and the coating formed by the silane coupling agent has high binding force to the substrate, high density, good wear resistance and high temperature resistance. The prepared silicone fluorine resin is matched with a silane coupling agent and a solvent to form a coating, which is coated on the surface of a glass substrate so that the coating has the effects of high temperature resistance, wear resistance and easy cleaning.

[0188] The above is a detailed description of the embodiments of the present invention, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A coating composition, characterized in that Including silicone fluorine resin, silane coupling agent and solvent; The raw materials for preparing the silicone-fluororesin include fluorosilane-modified nano-silica sol, fluorosilicone oil and perfluorinated compounds.

2. The coating composition according to claim 1, characterized in that The raw materials for preparing the silicone fluororesin include 1wt.% to 60wt.% of fluorosilane-modified nano-silica sol, 20wt.% to 75wt.% of fluorosilicone oil and 20wt.% to 90wt.% of perfluoro compound; the sum of the percentages of the various raw materials in the silicone fluororesin is 100wt.%.

3. The coating composition according to claim 1, characterized in that Calculated based on the total mass of the silicone fluororesin, the silane coupling agent and the solvent, the amount of the silicone fluororesin used is 0.01 wt.% to 50 wt.%.

4. The coating composition according to claim 1 or 3, characterized in that Calculated based on the total mass of the silicone fluororesin, the silane coupling agent and the solvent, the amount of the silicone fluororesin used is 0.01wt.% to 10wt.%.

5. The coating composition according to claim 1, characterized in that Calculated based on the total mass of the silicone fluorine resin, the silane coupling agent and the solvent, the amount of the silane coupling agent used is 0.01wt.% to 30wt.%.

6. The coating composition according to claim 1 or 2, characterized in that: The silane coupling agent includes at least one of 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 claim 1, characterized in that Calculated based on the total mass of the silicone fluorine resin, the silane coupling agent and the solvent, the amount of the solvent used is 20wt.% to 96wt.%.

8. The coating composition according to claim 1 or 2, characterized in that: The silicon dioxide content in the fluorosilane-modified nano-silica sol is 5 wt.% to 60 wt.%.

9. The coating composition according to claim 1 or 7, characterized in that: The solvent includes at least one of an alkane solvent, an ether solvent, a ketone solvent or a benzene-derived biosolvent.

10. The coating composition according to claim 1 or 2, characterized in that: The particle size of the nano silicon dioxide in the fluorosilane-modified nano silica sol is 1 to 1000 nm.

11. The coating composition according to claim 1 or 2, characterized in that: The fluorosilicone oil includes at least one of methyl fluorosilicone oil, vinyl fluorosilicone oil, perfluorosilicone oil, vinyl epoxy fluorosilicone oil, hydroxy fluorosilicone oil, copolymerized methyl fluorosilicone oil, hydrogen-containing fluorosilicone oil or copolymerized hydroxy fluorosilicone oil.

12. The coating composition according to claim 1 or 2, characterized in that: The perfluorinated compound includes at least one of perfluoropolyether, 1H,1H,2H-perfluoro-1-decane, perfluorododecane, perfluorohexadecanol, perfluorohexadecane, brominated perfluorododecane, perfluorododecane, perfluorohexadecane, perfluoroalkyl polyether, perfluoroalkyl propanol or perfluorododecylethylene.

13. The coating composition according to claim 1 or 2, characterized in that: The silicone fluorine resin is prepared by the following method: The fluorosilane-modified nano-silica sol, fluorosilicone oil, perfluorinated compounds and metal catalysts are mixed and heated to react to obtain the product.

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

15. A coating, characterized in that: A coating composition comprising any one of claims 1 to 13.

16. A method for preparing a coating, characterized in that: The steps include: The coating composition according to any one of claims 1 to 13 is coated on a substrate surface and then subjected to heat treatment to obtain the coating composition.

17. The method for preparing a coating according to claim 16, characterized in that: The temperature of the heat treatment is 100-160°C.

18. The method for preparing a coating according to claim 16, characterized in that: Prior to preparation, the substrate was plasma treated.

19. A household appliance, characterized in that: At least a portion of the surface of the household appliance is coated with the coating according to claim 15.

20. The household appliance according to claim 19, characterized in that: The household appliances include range hoods, stoves, dishwashers, microwave ovens or ovens.

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