CN113444446A - Corrosion-resistant coating composition, corrosion-resistant coating, preparation method and application of corrosion-resistant coating, and corrosion-resistant coating - Google Patents
Corrosion-resistant coating composition, corrosion-resistant coating, preparation method and application of corrosion-resistant coating, and corrosion-resistant coating Download PDFInfo
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- CN113444446A CN113444446A CN202110614421.3A CN202110614421A CN113444446A CN 113444446 A CN113444446 A CN 113444446A CN 202110614421 A CN202110614421 A CN 202110614421A CN 113444446 A CN113444446 A CN 113444446A
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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
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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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
Abstract
The invention relates to the technical field of coatings, in particular to a corrosion-resistant coating composition, a corrosion-resistant coating, a preparation method and application thereof, and a corrosion-resistant coating, wherein the coating composition contains the following components which are respectively independently stored or are mixed and stored: methyl polysiloxane resin, perhydropolysilazane, modified silicone oil, a silane coupling agent, fluorosilane and a solvent. The corrosion-resistant coating prepared from the corrosion-resistant coating composition provided by the invention has the advantages of easiness in cleaning, high hardness and good adhesiveness; in particular, the coating can also improve the hydrophobic and oleophobic effect and corrosion resistance of the material.
Description
Technical Field
The invention relates to the technical field of coatings, and particularly relates to a corrosion-resistant coating composition, a corrosion-resistant coating, a preparation method and application of the corrosion-resistant coating composition and a corrosion-resistant coating.
Background
Because the coating is in the environments of high and low temperature, heavy oil stain and the like for a long time, kitchen appliances such as a range hood, a gas stove, an oven, a microwave oven and the like have high requirements on performance indexes such as low surface energy, abrasion resistance, high and low temperature resistance, oxidation resistance and the like of the coating.
The easy-to-clean coating has the characteristics of hydrophobicity, oleophobicity, pollution resistance and the like on the surface, and has wide application prospect in the industries of household appliances, bathrooms, automobiles, buildings and the like. The easy-to-clean coating has low surface energy, has a high wetting angle for water and oil, is difficult to adhere to the surface, is not firm even if adhered, and is easy to fall off under the action of self weight or external force.
At present, the easy-to-clean coating mainly comprises coating systems such as organosilicon, fluorine-containing low-surface-energy coating, fluorine-silicon resin and the like. However, the existing easy-to-clean coating technology does not reach the level expected by the market, the stability of partial products on the market is poor, the oleophobic effect is gradually lost in the using process, and the problems of low coating hardness, poor wear resistance and the like can occur.
In addition, metal pipelines of household appliances such as water heaters and refrigerators are corroded in the using process, and the stability and safety of products are affected. Therefore, the development of a coating which is easy to clean, high in hardness and good in corrosion resistance and is applied to kitchen appliances is of great significance.
Disclosure of Invention
The invention aims to solve the problems that the surface of a material for the household appliance is difficult to clean, and the coating has low hardness, poor wear resistance and poor corrosion resistance in the prior art.
In order to achieve the above object, a first aspect of the present invention provides a corrosion-resistant coating composition comprising the following components stored independently of each other or in a mixture of two or more of them: methyl polysiloxane resin, perhydropolysilazane, modified silicone oil, a silane coupling agent, fluorosilane and a solvent;
based on the total mass of the coating composition, the content of the methyl polysiloxane resin is 10-40 mass%, the content of the perhydropolysilazane is 5-20 mass%, the content of the modified silicone oil is 0.02-0.07 mass%, the content of the silane coupling agent is 0.01-0.05 mass%, the content of the fluorosilane is 0.01-0.05 mass%, and the content of the solvent is 39.83-84.96 mass%;
wherein the perhydropolysilazane has a structure represented by the formula (1),
wherein, in the formula (1), n is a positive integer, and n makes the weight average molecular weight of the perhydropolysilazane 100-2000.
In a second aspect, the present invention provides a method of preparing a corrosion resistant coating, the method comprising: the components of the corrosion resistant coating composition of the first aspect are mixed.
In a third aspect, the present invention provides a corrosion resistant coating produced by the method of the second aspect.
In a fourth aspect, the present invention provides the use of the corrosion-resistant coating of the third aspect in household appliances, sanitary ware or automobiles.
A fifth aspect of the invention provides the use of the corrosion resistant coating of the third aspect in a kitchen appliance.
In a sixth aspect, the present invention provides a corrosion-resistant coating, which is obtained by spraying the corrosion-resistant coating of the third aspect onto a substrate surface, and then drying and curing the sprayed coating in sequence.
Compared with the existing coating technology, the corrosion-resistant coating composition and the corrosion-resistant coating provided by the invention have at least the following advantages:
the corrosion-resistant coating prepared from the corrosion-resistant coating composition provided by the invention has the advantages of easiness in cleaning, high hardness and good adhesiveness; in particular, the coating can also improve the hydrophobic and oleophobic effect and corrosion resistance of the material.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
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 ℃.
As described above, the first aspect of the present invention provides a corrosion-resistant coating composition containing the following components stored independently of each other or in a mixture of two or more of them: methyl polysiloxane resin, perhydropolysilazane, modified silicone oil, a silane coupling agent, fluorosilane and a solvent;
based on the total mass of the coating composition, the content of the methyl polysiloxane resin is 10-40 mass%, the content of the perhydropolysilazane is 5-20 mass%, the content of the modified silicone oil is 0.02-0.07 mass%, the content of the silane coupling agent is 0.01-0.05 mass%, the content of the fluorosilane is 0.01-0.05 mass%, and the content of the solvent is 39.83-84.96 mass%;
wherein the perhydropolysilazane has a structure represented by the formula (1),
wherein, in the formula (1), n is a positive integer, and n makes the weight average molecular weight of the perhydropolysilazane 100-2000.
Preferably, based on the total mass of the coating composition, the content of the methyl polysiloxane resin is 10-30 mass%, the content of the perhydropolysilazane is 5-10 mass%, the content of the modified silicone oil is 0.02-0.06 mass%, the content of the silane coupling agent is 0.01-0.03 mass%, the content of the fluorosilane is 0.01-0.04 mass%, and the content of the solvent is 59.91-84.96 mass%.
In this preferred embodiment, the inventors have found that a corrosion-resistant coating having a better water-and oil-repellent effect can be obtained.
Preferably, the perhydropolysilazane has a weight average molecular weight of 100-1000; preferably 300-.
More preferably, the perhydropolysilazane is a perhydropolysilazane available from silicone oil, Inc., Egyptian, Anhui. In this preferred embodiment, the inventors have found that the present invention enables a more easily cleaned corrosion-resistant coating to be obtained.
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, vinyl silicone oil and methyl hydrogen-containing silicone oil. In this preferred embodiment, a corrosion-resistant coating having a better water-and-oil-repellent effect and better adhesion can be obtained.
Preferably, the silane coupling agent is selected from at least one of gamma-aminopropyltrimethoxysilane, gamma-glycidoxypropyltrimethoxysilane, 3-isocyanatopropyltrimethoxysilane, gamma-methacryloxypropyltrimethoxysilane, gamma- (methacryloyloxy) propyltrimethoxysilane, isobutyltriethoxysilane, 3-aminopropyltriethoxysilane, and gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane.
More preferably, the silane coupling agent is at least one selected from the group consisting of gamma-aminopropyltrimethoxysilane, gamma-glycidoxypropyltrimethoxysilane, 3-aminopropyltriethoxysilane, and gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane.
Preferably, the fluorosilane is selected from at least one of perfluorodecyltrimethoxysilane, perfluorodecyltriethoxysilane, perfluorooctyltrimethoxysilane, perfluorooctyltriethoxysilane.
More preferably, the fluorosilane is selected from at least one of perfluorodecyltrimethoxysilane, perfluorodecyltriethoxysilane, perfluorooctyltriethoxysilane. 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 solvent is at least one selected from n-hexane, n-octane, n-decane, chloroform, dichloromethane, dichloroethylene, diethyl ether, petroleum ether, toluene, xylene, acetone, methyl ethyl ketone, cyclohexanone, ethyl acetate and butyl acetate.
More preferably, the solvent is at least one selected from n-hexane, petroleum ether, toluene, xylene, acetone, ethyl acetate, butyl acetate.
As previously mentioned, a second aspect of the present invention provides a method of preparing a corrosion resistant coating, the method comprising: the components of the corrosion resistant coating composition of the first aspect are mixed.
Preferably, the operation of mixing the components of the corrosion resistant coating composition comprises the steps of:
(1) in the presence of a solvent, carrying out a first contact reaction on each component in a composition A to obtain a diluent, wherein the composition A contains methyl polysiloxane resin, modified silicone oil and fluorosilane;
(2) and carrying out a second contact reaction on the diluent and each component in a composition B to obtain the corrosion-resistant coating, wherein the composition B contains perhydropolysilazane and a silane coupling agent.
Preferably, in step (1), the conditions of the first contact reaction at least satisfy: the stirring speed is 500-800rpm, the temperature is 20-40 ℃, and the time is 15-30 min.
More preferably, in step (1), the conditions of the first contact reaction at least satisfy: the stirring speed is 500-700rpm, the temperature is 23-25 ℃, and the time is 20-30 min.
Preferably, in step (2), the conditions of the second contact reaction at least satisfy: the stirring speed is 1000-1500rpm, the temperature is 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 1200-1500rpm, the temperature is 23-25 ℃, and the time is 15-25 min.
As previously mentioned, a third aspect of the invention provides a corrosion resistant coating produced by the method of the second aspect.
As mentioned above, a fourth aspect of the present invention provides the use of the corrosion resistant coating of the third aspect in household appliances, bathroom fixtures or automobiles.
As mentioned above, a fifth aspect of the present invention provides the use of the corrosion resistant coating of the third aspect in a kitchen appliance.
As described above, according to the sixth aspect of the present invention, there is provided a corrosion-resistant coating obtained by spraying the corrosion-resistant coating material according to the third aspect onto a surface of a substrate, followed by drying and curing.
Preferably, the substrate is a cold-rolled steel sheet substrate.
Preferably, the thickness of the coating is 0.1-100 μm, preferably 5-50 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 80-250 ℃ and the time is 0.5-5 h.
More preferably, the curing conditions at least satisfy: the temperature is 140 ℃ and 170 ℃, 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: BLD-D1, Bolede instruments, Inc. Dongguan;
spraying an instrument: w-71 spray gun, Japan rock field company, spraying distance 200(mm), nozzle caliber 0.8mm, air pressure 0.3 Mpa.
Raw materials
Methylpolysiloxane resin: the trade mark SH-9502, New four seas chemical industries, Inc. of Hubei;
perhydropolysilazane: molecular weight 900, mark IOTA PHPS, anghui silicon oil ltd;
modified silicone oil: methyl silicone oil, Shenzhen Jipeng company;
modified silicone oil: methyl hydrogen silicone oil, Shenzhen Jipeng company;
modified silicone oil: vinyl silicone oil, Shenzhen Jipeng company;
modified silicone oil: methyl fluorosilicone oil, Shenzhen Jipeng company;
silane coupling agent: gamma-aminopropyltrimethoxysilane, Sanfu silicon, Tangshan, Inc.;
silane coupling agent: gamma-glycidoxypropyltrimethoxysilane, Sanfu silicon, Tang mountain, Inc.;
silane coupling agent: gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane, Sanfu silicon, Inc., Tang mountain;
silane coupling agent: 3-aminopropyltriethoxysilane, Sanfu silicon industries, Inc. of Tangshan;
fluorosilane: perfluorodecyl triethoxysilane, tomayne chemical company;
fluorosilane: perfluorooctyltriethoxysilane, tomayne chemical company;
fluorosilane: perfluorodecyltrimethoxysilane, tomamine chemical company;
fluorosilane: perfluorooctyltrimethoxysilane, tomamine chemical company;
solvent: n-hexane, denuo chemical ltd, dennan;
solvent: ethyl acetate, denno chemical ltd, denna;
solvent: acetone, jonan yuno chemical ltd;
solvent: para-xylene, denuo chemical ltd, dennan;
solvent: petroleum ether, jonan yuno chemical ltd;
solvent: toluene, dennam yuno chemical co;
solvent: butyl acetate, deno chemical ltd, denna;
matrix: cold rolled steel sheet substrate, designation DC03, gem.
The amounts of the components in the following examples are all expressed in mass% based on the total mass of the coating composition.
In the following examples, the performance test methods involved are as follows:
1. water contact Angle test
The water contact angle is tested by adopting a full-automatic water contact angle tester.
2. Hardness test
The hardness was tested according to the national standard GB/T6739-2009.
3. Adhesion Performance test
The adhesion properties were tested according to the national standard GB/T9286-1998.
Example 1
This example illustrates the formulation and process parameters of the corrosion resistant coating composition of the present invention according to Table 1, and the corrosion resistant coating is prepared as described below.
The method for preparing the corrosion-resistant coating comprises the following steps:
(1) adding methyl polysiloxane resin, methyl silicone oil, perfluorodecyl triethoxysilane and n-hexane into a beaker, and stirring at room temperature at 600rpm for 20min to obtain a diluent;
(2) and adding the diluent, perhydropolysilazane and gamma-aminopropyltrimethoxysilane into a beaker, and stirring at room temperature at 1200rpm for 20min to obtain the corrosion-resistant coating.
And spraying the corrosion-resistant coating on the surface of a cold-rolled steel plate substrate to form a coating layer, drying the cold-rolled steel plate substrate with the coating layer at room temperature for 0.5h, and curing the cold-rolled steel plate substrate with the coating layer in an oven at the temperature of 150 ℃ for 2h to obtain the corrosion-resistant coating S1.
The remaining examples were carried out using the same procedure as in example 1, except that the formulation of the corrosion resistant coating composition and the process parameters were different, without specific mention, in table 1.
Comparative example 1
This comparative example was carried out using a procedure similar to that of example 1, except that: the modified silicone oil is not contained in the formula, and the specific reference is made to table 1.
Comparative example 2
This comparative example was carried out using a procedure similar to that of example 1, except that: in the formula, the fluorosilicone resin with equal mass is adopted to replace the methyl polysiloxane resin.
Comparative example 3
This comparative example was carried out using a procedure similar to that of example 1, except that: in the formula, the fluorine modified polysilazane with equal mass is used for replacing perhydropolysilazane.
Comparative example 4
This comparative example was carried out using a procedure similar to that of example 1, except that: the formulation does not contain perhydropolysilazane, see in particular table 1.
TABLE 1
Table 1 (continuation watch)
The corrosion-resistant coatings obtained in the respective examples were subjected to performance measurement using the foregoing test methods, and the specific results are shown in table 2.
TABLE 2
From the results, the corrosion-resistant coating prepared by the corrosion-resistant coating composition provided by the invention has the advantages of easiness in cleaning, high hardness and good adhesiveness; in particular, the coating can also improve the hydrophobic and oleophobic effect and corrosion resistance of the material.
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 (19)
1. The corrosion-resistant coating composition is characterized by comprising the following components which are stored independently or in a mixed manner: methyl polysiloxane resin, perhydropolysilazane, modified silicone oil, a silane coupling agent, fluorosilane and a solvent;
based on the total mass of the coating composition, the content of the methyl polysiloxane resin is 10-40 mass%, the content of the perhydropolysilazane is 5-20 mass%, the content of the modified silicone oil is 0.02-0.07 mass%, the content of the silane coupling agent is 0.01-0.05 mass%, the content of the fluorosilane is 0.01-0.05 mass%, and the content of the solvent is 39.83-84.96 mass%;
wherein the perhydropolysilazane has a structure represented by the formula (1),
wherein, in the formula (1), n is a positive integer, and n makes the weight average molecular weight of the perhydropolysilazane 100-2000.
2. The corrosion-resistant coating composition according to claim 1, wherein the content of the methyl polysiloxane resin is 10 to 30 mass%, the content of the perhydropolysilazane is 5 to 10 mass%, the content of the modified silicone oil is 0.02 to 0.06 mass%, the content of the silane coupling agent is 0.01 to 0.03 mass%, the content of the fluorosilane is 0.01 to 0.04 mass%, and the content of the solvent is 59.91 to 84.96 mass%, based on the total mass of the coating composition.
3. The corrosion resistant coating composition of claim 1 or 2, wherein the perhydropolysilazane has a weight average molecular weight of 100-1000; preferably 300-.
4. The corrosion-resistant coating composition according to any one of claims 1 to 3, 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.
5. The corrosion resistant coating composition of any one of claims 1-4, wherein the silane coupling agent is selected from at least one of gamma-aminopropyltrimethoxysilane, gamma-glycidoxypropyltrimethoxysilane, 3-isocyanatopropyltrimethoxysilane, gamma-methacryloxypropyltrimethoxysilane, gamma- (methacryloyloxy) propyltrimethoxysilane, isobutyltriethoxysilane, 3-aminopropyltriethoxysilane, gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane;
preferably, the silane coupling agent is at least one selected from the group consisting of gamma-aminopropyltrimethoxysilane, gamma-glycidoxypropyltrimethoxysilane, 3-aminopropyltriethoxysilane, and gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane.
6. The corrosion resistant coating composition of any one of claims 1-5, wherein the fluorosilane is selected from at least one of perfluorodecyltrimethoxysilane, perfluorodecyltriethoxysilane, perfluorooctyltrimethoxysilane, perfluorooctyltriethoxysilane;
preferably, the fluorosilane is selected from at least one of perfluorodecyltrimethoxysilane, perfluorodecyltriethoxysilane, perfluorooctyltriethoxysilane.
7. The corrosion resistant coating composition of any one of claims 1-6, 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, ethyl acetate, butyl acetate;
preferably, the solvent is at least one selected from n-hexane, petroleum ether, toluene, xylene, acetone, ethyl acetate and butyl acetate.
8. A method of preparing a corrosion resistant coating, comprising: mixing the components of the corrosion resistant coating composition of any one of claims 1-7.
9. The method of claim 8, wherein mixing the components of the corrosion resistant coating composition comprises:
(1) in the presence of a solvent, carrying out a first contact reaction on each component in a composition A to obtain a diluent, wherein the composition A contains methyl polysiloxane resin, modified silicone oil and fluorosilane;
(2) and carrying out a second contact reaction on the diluent and each component in a composition B to obtain the corrosion-resistant coating, wherein the composition B contains perhydropolysilazane and a silane coupling agent.
10. The process according to claim 8 or 9, wherein in step (1), the conditions of the first contact reaction at least satisfy: the stirring speed is 500-800rpm, the temperature is 20-40 ℃, and the time is 15-30 min;
preferably, in step (1), the conditions of the first contact reaction at least satisfy: the stirring speed is 500-700rpm, the temperature is 23-25 ℃, and the time is 20-30 min.
11. The method according to any one of claims 8 to 10, wherein in step (2), the conditions of the second contact reaction at least satisfy: the stirring speed is 1000-1500rpm, 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 1200-1500rpm, the temperature is 23-25 ℃, and the time is 15-25 min.
12. A corrosion resistant coating made by the method of any one of claims 8-11.
13. Use of the corrosion resistant coating of claim 12 in household appliances, sanitary ware or automobiles.
14. Use of the corrosion resistant coating of claim 12 in a kitchen appliance.
15. A corrosion-resistant coating obtained by spraying the corrosion-resistant coating according to claim 12 on a substrate surface, followed by drying and curing.
16. The corrosion-resistant coating of claim 15, wherein the substrate is a cold rolled steel sheet substrate.
17. The corrosion-resistant coating according to claim 15 or 16, wherein the thickness of the coating is 0.1-100 μ ι η, preferably 5-50 μ ι η.
18. The corrosion-resistant coating of any one of claims 15-17, wherein the drying conditions at least satisfy: 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.
19. The corrosion-resistant coating of any one of claims 15-18, wherein the conditions of curing at least satisfy: the temperature is 80-250 ℃ and the time is 0.5-5 h;
preferably, the curing conditions at least satisfy: the temperature is 140 ℃ and 170 ℃, and the time is 0.5-2 h.
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| CN114736551A (en) * | 2022-04-13 | 2022-07-12 | 深圳德诚达光电材料有限公司 | Fluorine-containing organic silicon coating agent with excellent adhesion performance and preparation method thereof |
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| CN109517522A (en) * | 2018-11-20 | 2019-03-26 | 萍乡亨厚新材科技有限公司 | A kind of super-hydrophobic self-cleaning coating for building |
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Application publication date: 20210928 |