CN113174200A - Coating composition, coating, preparation method and application thereof, and coating - Google Patents
Coating composition, coating, preparation method and application thereof, and coating Download PDFInfo
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- CN113174200A CN113174200A CN202110556401.5A CN202110556401A CN113174200A CN 113174200 A CN113174200 A CN 113174200A CN 202110556401 A CN202110556401 A CN 202110556401A CN 113174200 A CN113174200 A CN 113174200A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
- C09D183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention relates to the technical field of coatings, and discloses a coating composition, a coating, a preparation method and application thereof, and a coating. The coating composition contains the following components which are stored independently or in a mixed manner: epoxy modified organic silicon resin, polysilazane, fluorosilane, modified silicone oil, hydrophobic silicon dioxide and a solvent. According to the invention, a coating composition is obtained by compounding a specific amount of epoxy modified organic silicon resin, polysilazane, fluorosilane, modified silicone oil, hydrophobic silicon dioxide and a solvent, and a coating prepared by using the coating composition has the advantages of high temperature resistance, high hardness and good adhesiveness; particularly, when the coating is applied to kitchen appliances, the hydrophobic and oleophobic effect of the kitchen appliances can be given, and the defect that the surfaces of the traditional kitchen electric products are difficult to clean is effectively overcome.
Description
Technical Field
The invention relates to the technical field of coatings, and particularly relates to a coating composition, a coating, a preparation method and application thereof, and a coating.
Background
Along with the improvement of living standard, people have more and more strong demand on easy cleaning of kitchen appliances such as range hoods, gas stoves and ovens. When the kitchen appliance is used in a heavy oil pollution environment for a long time, more oil stains and stains can be adhered to the surface of the kitchen appliance, so that the kitchen appliance is difficult to clean. At present, most of panels of kitchen appliances are made of metal, glass, plastic and the like, wherein the plastic has the advantages of economy, durability, strong plasticity, easiness in processing and the like, and is widely applied to household appliances.
The surface coating materials of the kitchen and electric products which are commonly used for plastic materials in the prior art mainly comprise fluorocarbon coating, organic silicon coating, epoxy powder and the like, and the coating has the defects of low hardness, difficult cleaning and the like. Therefore, there is a need to develop a coating on a plastic substrate that is hard and easy to clean.
Disclosure of Invention
The invention aims to solve the problems of low hardness and difficult cleaning of the surface coating of the kitchen electrical appliance products in the prior art.
In order to achieve the above object, a first aspect of the present invention provides a coating composition comprising the following components stored independently of each other or in a mixture of two or more of them:
epoxy modified organic silicon resin, polysilazane, fluorosilane, modified silicone oil, hydrophobic silicon dioxide and a solvent;
the polysilazane has a structure represented by the formula (1),
wherein, in the formula (1), R1、R2And R3Each independently selected from hydrogen and C1-20Alkyl of (C)2-20Alkenyl of, C6-20Aryl of (C)1-20Alkoxy and C1-20alkyl-NH-, n is an integer from 1 to 100;
based on the total mass of the coating composition, the content of the epoxy modified silicone resin is 5-50 mass%, the content of the polysilazane is 5-30 mass%, the content of the fluorosilane is 0.01-0.5 mass%, the content of the modified silicone oil is 0.01-0.05 mass%, the content of the hydrophobic silica is 1-10 mass%, and the content of the solvent is 30-85 mass%.
In a second aspect, the present invention provides a method of preparing a coating, the method comprising: mixing the components of the coating composition of the first aspect.
In a third aspect, the present invention provides a coating produced by the method of the second aspect.
A fourth aspect of the invention provides the use of a coating as described by the third aspect in an appliance.
A fifth aspect of the invention provides the use of a coating as described by the third aspect in a kitchen appliance.
The sixth aspect of the present invention provides a coating obtained by spraying the coating material of the third aspect onto a surface of a substrate, followed by drying and curing in this order.
According to the invention, a coating composition is obtained by compounding a specific amount of epoxy modified organic silicon resin, polysilazane, fluorosilane, modified silicone oil, hydrophobic silicon dioxide and a solvent, and a coating prepared by using the coating composition has the advantages of high hardness and good adhesiveness; particularly, when the coating is applied to kitchen appliances, the hydrophobic and oleophobic effect of the kitchen appliances can be given, and the defect that the surfaces of the traditional kitchen electric products are difficult to clean is effectively overcome.
The inventors have found that coatings made from the compositions of the present invention, when applied to plastic substrates, provide coatings with greater hardness and greater ease of cleaning.
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
It should be noted that, in various aspects of the present invention, the present invention is described only once in one aspect thereof without repeated description with respect to the same components in the aspects, and those skilled in the art should not be construed as limiting the present invention.
In the case where no explanation is given to the contrary, the room temperature in the present invention is 25. + -. 2 ℃.
Said C is1-20The alkyl group of (A) means an alkyl group having a total number of carbon atoms of 1 to 20, and includes straight-chain alkyl groups and branched-chain alkyl groups, and may be, for example, C1、C2、C3、C4、C5、C6、C7、C8、C9、C10、C11、C12、C13、C14、C15、C16、C17、C18、C19Or C20Alkyl group of (1). "C1-10The alkyl group of (1) has a similar explanation to this, only the total number of carbon atoms is different.
Said C is2-20The alkenyl group means an alkenyl group having 2 to 20 carbon atoms in total, and includes a straight-chain alkenyl group and a branched-chain alkenyl group, and may be, for example, C2、C3、C4、C5、C6、C7、C8、C9、C10、C11、C12、C13、C14、C15、C16、C17、C18、C19Or C20Alkenyl groups of (a). "C2-10The "alkenyl group" has similar explanations as above, only the total number of carbon atoms is different.
Said C is6-20The aryl group of (2) means an aryl group having 6 to 20 carbon atoms in total, and may be, for example, a phenyl group, an alkyl-substituted phenyl group, a naphthyl group, an alkyl-substituted naphthyl group, a biphenyl group, an alkyl-substituted biphenyl group or the like. "C6-12The aryl group of (1) has a similar interpretation to this, only differing in the total number of carbon atoms.
Said C is1-20The alkoxy group (C) means an alkoxy group having 1 to 20 carbon atoms in total, and may be, for example, C1、C2、C3、C4、C5、C6、C7、C8、C9、C10、C11、C12、C13、C14、C15、C16、C17、C18、C19Or C20Alkoxy group of (2). "C1-10The "alkoxy group" of (a) has a similar explanation to this, only the total number of carbon atoms is different.
Said C is1-20alkyl-NH-means: one substituent on N is C1-20Alkyl, illustratively, C1-20alkyl-NH-may be, for example, CH3-NH-, the "CH3"may be substituted by C1-20Any group of alkyl groups. "C1-10alkyl-NH- "has a similar interpretation, only differing in the total number of carbon atoms.
As described above, the first aspect of the present invention provides a coating composition containing the following components stored independently of each other or in a mixture of two or more of them:
epoxy modified organic silicon resin, polysilazane, fluorosilane, modified silicone oil, hydrophobic silicon dioxide and a solvent;
the polysilazane has a structure represented by the formula (1),
wherein, in the formula (1), R1、R2And R3Each independently selected from hydrogen and C1-20Alkyl of (C)2-20Alkenyl of, C6-20Aryl of (C)1-20Alkoxy and C1-20alkyl-NH-, n is an integer from 1 to 100;
based on the total mass of the coating composition, the content of the epoxy modified silicone resin is 5-50 mass%, the content of the polysilazane is 5-30 mass%, the content of the fluorosilane is 0.01-0.5 mass%, the content of the modified silicone oil is 0.01-0.05 mass%, the content of the hydrophobic silica is 1-10 mass%, and the content of the solvent is 30-85 mass%.
Preferably, the content of the epoxy-modified silicone resin is 10 to 30 mass%, the content of the polysilazane is 5 to 15 mass%, the content of the fluorosilane is 0.01 to 0.1 mass%, the content of the modified silicone oil is 0.01 to 0.03 mass%, the content of the hydrophobic silica is 1 to 5 mass%, and the content of the solvent is 60 to 84 mass%, based on the total mass of the coating composition. The inventors have found that with the preferred embodiment, a coating with higher hardness and better adhesion can be obtained.
Preferably, the weight average molecular weight of the epoxy-modified silicone resin is 1000-5000, preferably 2000-3000.
Preferably, the epoxy-modified silicone resin is an epoxy-modified polysiloxane resin.
More preferably, the epoxy-modified silicone resin is epoxy-modified polysiloxane resin YS616 available from new materials of shogaku, junan. In this preferable case, a coating composition having high hardness and excellent adhesion can be obtained.
Preferably, in formula (1), R1、R2And R3Each independently selected from hydrogen and C1-10The alkyl, alkenyl of C2-10, aryl of C6-12, alkoxy of C1-10 and C1-10 alkyl-NH, and n is an integer of 1-20.
Preferably, in formula (1), R1、R2And R3Are the same or different, and R1、R2At least one of which is methyl.
Preferably, the polysilazane has a weight average molecular weight of 100-10000, preferably 500-2000.
Preferably, the polysilazane is polysilazane IOTA-9108, available from yota, inc. The inventors have found that in this preferred case, the coating obtained from the coating composition has the advantage of being easier to clean.
Preferably, the modified silicone oil is selected from at least one of methyl silicone oil, vinyl silicone oil, methyl hydrogen-containing silicone oil, methyl fluorosilicone oil, polyether modified silicone oil and amino modified silicone oil.
Preferably, the modified silicone oil is selected from at least one of methyl silicone oil JP201 of Shenzhen Shenpeng actual group Limited and vinyl silicone oil JP-208 of Shenzhen Shenpeng actual group Limited. In this preferred case, the coating layer produced using the coating composition has more excellent adhesion properties.
Preferably, the solvent is selected from at least one of n-hexane, n-octane, n-decane, chloroform, dichloromethane, dichloroethylene, diethyl ether, petroleum ether, toluene, xylene, acetone, methyl ethyl ketone, cyclohexanone, butyl acetate, and ethyl acetate.
Preferably, the solvent is selected from at least one of ethyl acetate, xylene, and toluene. In this preferred case, the coatings produced with the coating compositions have better high temperature resistance.
Preferably, the fluorosilane is selected from at least one of perfluorodecyltrimethoxysilane, perfluorodecyltriethoxysilane, perfluorooctyltrimethoxysilane, perfluorooctyltriethoxysilane.
More preferably, the fluorosilane is perfluorodecyltrimethoxysilane available from carumurus facilis chemical industries, ltd. The inventors have found that the coating compositions obtained in this preferred case produce coatings which are easier to clean and which have better hydrophobic and oleophobic properties.
Preferably, the hydrophobic silica is selected from at least one of Degussa fumed silica R812s, Degussa fumed silica R972s, Degussa fumed silica R974s, CABOT fumed silica TS-530, CABOT fumed silica TS-720, watt HDK fumed silica H13L, watt HDK fumed silica H15, watt HDK fumed silica H17, watt HDK fumed silica H18, watt HDK fumed silica H20, watt HDK fumed silica H30, watt HDK fumed silica H20RM and watt HDK fumed silica H2000.
More preferably, the hydrophobic silica is selected from at least one of Degussa fumed silica R812s, watt HDK fumed silica H20RM, Degussa fumed silica R974s, CABOT fumed silica TS-720. The inventors have found that the coating composition obtained in this preferred case has a better hydrophobic-oleophobic effect and better adhesion.
As previously mentioned, a second aspect of the present invention provides a method of preparing a coating, the method comprising: mixing the components of the coating composition of the first aspect.
Preferably, the operation of mixing the components of the coating composition comprises the steps of:
(1) in the presence of a solvent, carrying out a first contact reaction on epoxy modified polysiloxane resin, fluorosilane and modified silicone oil to obtain a diluent;
(2) and carrying out a second contact reaction on the diluent, polysilazane and hydrophobic silicon dioxide to obtain the coating.
Preferably, in step (1), the conditions of the first contact reaction at least satisfy: the stirring speed is 100-800rpm, the temperature is 20-40 ℃, and the time is 10-60 min.
More preferably, in step (1), the conditions of the first contact reaction at least satisfy: the stirring speed is 500-800rpm, the temperature is 23-25 ℃, and the time is 15-30 min.
Preferably, in step (2), the conditions of the second contact reaction at least satisfy: the stirring speed is 1000-2000rpm, the temperature is 20-40 ℃, and the time is 10-30 min.
More preferably, in step (2), the conditions of the second contact reaction at least satisfy: the stirring speed is 1000-1500rpm, the temperature is 23-25 ℃, and the time is 10-20 min.
As previously mentioned, a third aspect of the invention provides a coating produced by the method of the second aspect.
As previously mentioned, a fourth aspect of the invention provides the use of a coating as described by the third aspect in an appliance.
As mentioned above, a fifth aspect of the present invention provides the use of the coating material of the third aspect in a kitchen appliance.
As described above, the sixth aspect of the present invention provides a coating layer obtained by applying the coating material according to the third aspect to the surface of a substrate by spraying, followed by drying and curing.
Preferably, the substrate is a plastic substrate.
Preferably, the matrix is selected from at least one of a polypropylene matrix, an acrylonitrile-butadiene-styrene matrix.
Preferably, the thickness of the coating is 0.1-100 μm, preferably 1-20 μm.
Preferably, the drying conditions at least satisfy: the temperature is 20-40 ℃ and the time is 0.5-2 h.
More preferably, the drying conditions at least satisfy: the temperature is 23-25 ℃ and the time is 0.5-1 h.
Preferably, the curing conditions at least satisfy: the temperature is 90-250 ℃ and the time is 0.5-5 h.
More preferably, the curing conditions at least satisfy: the temperature is 100 ℃ and 200 ℃, and the time is 0.5-2 h.
The present invention will be described in detail below by way of examples.
In the following examples, unless otherwise specified, the laboratory instruments and raw materials are commercially available.
Laboratory apparatus
Full-automatic water contact angle tester: model Bolede BLD-D1, Bolede instruments, Inc., Dongguan;
spraying an instrument: model number spray gun W-71, Japan rock field company;
raw materials
Epoxy modified silicone resin: an epoxy-modified polysiloxane resin having a weight average molecular weight of 2200 and a designation of YS616, available from JUN SHOWAY NOW MATRIX CO., LTD;
vinyl resin: purchased from denna facile resins ltd;
polysilazane: weight average molecular weight 900, designation IOTA-9108, available from ai jo tower, inc, Anhui;
organic polyborosilazane: number average molecular weight of 700, number IOTA-9120, available from ai xiao ta silicone oil ltd, Anhui;
fluorosilane: perfluorodecyl trimethoxysilane, available from Fufuyi Fujiu Co., Ltd;
fluorosilane: perfluorooctyltrimethoxysilane, available from carfuyi cis chemical ltd;
fluorosilane: perfluorodecyl triethoxysilane, available from Fufuyi Fujie chemical Co., Ltd;
fluorosilane: perfluorooctyltriethoxysilane, available from Fufuyi Fujie chemical Co., Ltd;
fluorosilane: heptadecafluorodecyltriethoxysilane, available from Fufuyi Fujiu Co.Ltd;
modified silicone oil: methyl silicone oil, the designation JP255, purchased from Shenzhen Jipeng silicon fluoride materials GmbH;
modified silicone oil: methyl hydrogen-containing silicone oil, the trademark JP484, available from Shenzhen Jipeng silicon fluoride materials GmbH;
modified silicone oil: vinyl silicone oil, the designation JP002, was purchased from Jenpen silicon fluoride materials, Inc., Shenzhen;
hydrophobic silica: fumed silica R812s, available from Degussa, Inc. of Germany;
hydrophobic silica: fumed silica H20RM, available from Wack HDK company;
hydrophobic silica: fumed silica TS-720, available from CABOT corporation;
hydrophobic silica: fumed silica R974s, available from Degussa, inc;
hydrophobic silica: fumed silica R972s available from Degussa, Texas;
solvent: ethyl acetate, purchased from southbound tomb petrochemicals ltd;
solvent: acetone, purchased from southbound tomb petrochemicals ltd;
solvent: toluene, purchased from southbound tomb petrochemical company;
solvent: xylene, available from jonan yuno chemical co;
solvent: butyl acetate, available from dennay chemical ltd;
solvent: petroleum ether, available from jonan yuno chemical co;
solvent: acetone, available from jonan yuno chemical co;
matrix: polypropylene matrix, purchased from san Dongchang Yaozha new materials, Inc.;
matrix: acrylonitrile-butadiene-styrene matrix available from imperial japan;
the amounts of the components in the following examples are all expressed in "% by mass" based on the total mass of the coating composition, and the total mass of the coating composition is 1000 g.
Example 1
This example illustrates the formulation and processing parameters of the coating composition of the present invention according to Table 1, and the preparation of the coating according to the method described below.
The method for preparing the coating comprises the following steps:
(1) adding ethyl acetate, epoxy modified silicone resin, perfluorodecyl trimethoxy silane and methyl silicone oil into a beaker at room temperature, and stirring at 600rpm for 20min to obtain a diluent;
(2) the diluted solution, polysilazane and fumed silica R812s were added to a beaker at room temperature, and stirred at 1200rpm for 20min to obtain the coating.
And (3) spraying the coating (the spraying distance is 200mm, the caliber of a nozzle is 0.8mm, and the air pressure is 0.3MPa) on the surface of the polypropylene substrate to form a coating layer, then drying the polypropylene substrate with the coating layer at room temperature for 1h, and then putting the polypropylene substrate with the coating layer into an oven with the temperature of 120 ℃ for curing for 2h to obtain a coating S1.
The remaining examples were carried out using the same procedure as in example 1, except that the coating composition formulation and the process parameters were different, unless otherwise specified, see in particular table 1.
Comparative example 1
This comparative example was carried out using a procedure similar to that of example 3, except that: the formulation does not contain fluorosilane, see table 1 for details.
Comparative example 2
This comparative example was carried out using a procedure similar to that of example 3, except that: the modified silicone oil was not included in the formulation, see in particular table 1.
Comparative example 3
This comparative example was carried out using a procedure similar to that of example 3, except that: the vinyl resin is adopted to replace epoxy modified organic silicon resin in the formula.
Comparative example 4
This comparative example was carried out using a procedure similar to that of example 3, except that: organic polyborosilazane is used to replace polysilazane in the formula.
Comparative example 5
This comparative example was carried out using a procedure similar to that of example 3, except that: heptadecafluorodecyltriethoxysilane is adopted to replace perfluorodecyltriethoxysilane in the formula.
TABLE 1
Table 1 (continuation 1)
Test example 1
The water contact angle, hardness, adhesion and other properties of the example and comparative products were tested, and the results are shown in Table 2 below.
Wherein, the water contact angle is tested by adopting a full-automatic water contact angle tester;
testing the hardness of the coating according to the national standard GB/T6739-2009;
the adhesion performance of the coating was tested according to the national standard GB/T9286-1998.
TABLE 2
| Water contact angle/° c | Hardness of | Adhesion force | |
| Example 1 | 104.2 | 5H | 0 |
| Example 2 | 103.6 | 5H | 0 |
| Example 3 | 104.5 | 6H | 0 |
| Example 4 | 102.1 | 5H | 0 |
| Example 5 | 101.6 | 6H | 0 |
| Example 6 | 102.6 | 5H | 0 |
| Example 7 | 103.9 | 6H | 0 |
| Example 8 | 105.1 | 5H | 0 |
| Comparative example 1 | 94.6 | 3H | 0 |
| Comparative example 2 | 98.3 | 4H | 0 |
| Comparative example 3 | 93.9 | 3H | 0 |
| Comparative example 4 | 89.3 | 4H | 0 |
| Comparative example 5 | 88.3 | 4H | 0 |
The results in table 2 show that the coating composition is obtained by compounding the epoxy modified silicone resin, the polysilazane, the fluorosilane, the modified silicone oil, the hydrophobic silicon dioxide and the solvent according to the specific mixture ratio, and the coating prepared by using the coating composition has the advantages of high temperature resistance, high hardness and good adhesion; particularly, when the coating is applied to kitchen appliances, the hydrophobic and oleophobic effect of the kitchen appliances can be given, and the defect that the surfaces of the traditional kitchen electric products are difficult to clean is effectively overcome.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (20)
1. A coating composition characterized by containing the following components stored independently of each other or in a mixture of two or more of them:
epoxy modified organic silicon resin, polysilazane, fluorosilane, modified silicone oil, hydrophobic silicon dioxide and a solvent;
the polysilazane has a structure represented by the formula (1),
wherein, in the formula (1), R1、R2And R3Each independently selected from hydrogen and C1-20Alkyl of (C)2-20Alkenyl of, C6-20Aryl of (C)1-20Alkoxy and C1-20alkyl-NH-, n is an integer from 1 to 100;
based on the total mass of the coating composition, the content of the epoxy modified silicone resin is 5 to 50 mass%, the content of the polysilazane is 5 to 30 mass%, the content of the fluorosilane is 0.01 to 0.5 mass%, the content of the modified silicone oil is 0.01 to 0.05 mass%, the content of the hydrophobic silica is 1 to 10 mass%, and the content of the solvent is 30 to 85 mass%.
2. The coating composition according to claim 1, wherein the content of the epoxy-modified silicone resin is 10 to 30 mass%, the content of the polysilazane is 5 to 15 mass%, the content of the fluorosilane is 0.01 to 0.1 mass%, the content of the modified silicone oil is 0.01 to 0.03 mass%, the content of the hydrophobic silica is 1 to 5 mass%, and the content of the solvent is 60 to 84 mass%, based on the total mass of the coating composition.
3. The coating composition according to claim 1 or 2, wherein the epoxy-modified silicone resin is an epoxy-modified polysiloxane resin.
4. The coating composition according to any one of claims 1 to 3, wherein R in formula (1)1、R2And R3Each independently selected from hydrogen and C1-10Alkyl of (C)2-10Alkenyl of, C6-12Aryl of (C)1-10Alkoxy and C1-10alkyl-NH-, n is an integer from 1 to 20;
preferably, in formula (1), R1、R2And R3Are the same or different, and R1、R2At least one of which is methyl;
preferably, the polysilazane has a weight average molecular weight of 100-10000, preferably 500-2000.
5. The coating composition according to any one of claims 1 to 4, wherein the modified silicone oil is at least one selected from the group consisting of methyl silicone oil, vinyl silicone oil, methyl hydrogen-containing silicone oil, methyl fluorosilicone oil, polyether modified silicone oil, and amino modified silicone oil;
preferably, the modified silicone oil is selected from at least one of methyl silicone oil and vinyl silicone oil.
6. The coating composition according to any one of claims 1 to 5, wherein the solvent is selected from at least one of n-hexane, n-octane, n-decane, chloroform, dichloromethane, dichloroethylene, diethyl ether, petroleum ether, toluene, xylene, acetone, methyl ethyl ketone, cyclohexanone, butyl acetate, and ethyl acetate;
preferably, the solvent is selected from at least one of ethyl acetate, xylene, and toluene.
7. The coating composition of any one of claims 1-6, wherein the fluorosilane is selected from at least one of perfluorodecyltrimethoxysilane, perfluorodecyltriethoxysilane, perfluorooctyltrimethoxysilane, perfluorooctyltriethoxysilane;
preferably, the fluorosilane is perfluorodecyltrimethoxysilane.
8. The coating composition according to any one of claims 1 to 7, wherein the hydrophobic silica is selected from at least one of Degussa fumed silica R812s, Degussa fumed silica R972s, Degussa fumed silica R974s, CABOT fumed silica TS-530, CABOT fumed silica TS-720, watt HDK fumed silica H13L, watt HDK fumed silica H15, watt HDK fumed silica H17, watt HDK fumed silica H18, watt HDK fumed silica H20, watt HDK fumed silica H30, watt HDK fumed silica H20RM, and watt HDK fumed silica H2000;
preferably, the hydrophobic silica is selected from at least one of Degussa fumed silica R812s, watt HDK fumed silica H20RM, Degussa fumed silica R974s, CABOT fumed silica TS-720.
9. A method of preparing a coating, the method comprising: mixing the components of the coating composition of any one of claims 1 to 8.
10. The method of claim 9, wherein the act of mixing the components of the coating composition comprises the steps of:
(1) in the presence of a solvent, carrying out a first contact reaction on epoxy modified polysiloxane resin, fluorosilane and modified silicone oil to obtain a diluent;
(2) and carrying out a second contact reaction on the diluent, polysilazane and hydrophobic silicon dioxide to obtain the coating.
11. The method of claim 10, wherein in step (1), the conditions of the first contact reaction at least satisfy: the stirring speed is 100-800rpm, the temperature is 20-40 ℃, and the time is 10-60 min;
preferably, in step (1), the conditions of the first contact reaction at least satisfy: the stirring speed is 500-800rpm, the temperature is 23-25 ℃, and the time is 15-30 min.
12. The process according to claim 10 or 11, wherein in step (2), the conditions of the second contact reaction at least satisfy: the stirring speed is 1000-2000rpm, the temperature is 20-40 ℃, and the time is 10-30 min;
preferably, in step (2), the conditions of the second contact reaction at least satisfy: the stirring speed is 1000-1500rpm, the temperature is 23-25 ℃, and the time is 10-20 min.
13. A coating produced by the method of any one of claims 9 to 12.
14. Use of the coating material as claimed in claim 13 in an electrical appliance.
15. Use of a coating as claimed in claim 13 in a kitchen appliance.
16. A coating which is obtained by spraying the coating material as claimed in claim 13 on the surface of a substrate and then drying and curing the coating material in this order.
17. The coating of claim 16, wherein the substrate is a plastic substrate;
preferably, the matrix is selected from at least one of a polypropylene matrix, an acrylonitrile-butadiene-styrene matrix.
18. Coating according to claim 16, wherein the thickness of the coating is 0.1-100 μm, preferably 1-20 μm.
19. The coating of any one of claims 16-18, wherein the drying conditions are at least: the temperature is 20-40 ℃, and the time is 0.5-2 h;
preferably, the drying conditions at least satisfy: the temperature is 23-25 ℃ and the time is 0.5-1 h.
20. The coating of any one of claims 16-19, wherein the curing conditions at least satisfy: the temperature is 90-250 ℃ and the time is 0.5-5 h;
preferably, the curing conditions at least satisfy: the temperature is 100 ℃ and 200 ℃, and the time is 0.5-2 h.
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| CN114196054A (en) * | 2021-12-29 | 2022-03-18 | 清远爱奇制造有限公司 | Polyolefin seat and preparation method and application thereof |
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