CN115386278A - Transparent hard antifouling coating and preparation method and application thereof - Google Patents
Transparent hard antifouling coating and preparation method and application thereof Download PDFInfo
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
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- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- 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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- 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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- 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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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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Abstract
The application belongs to the technical field of surface treatment, and particularly relates to a transparent hard antifouling coating and a preparation method and application thereof. The transparent hard antifouling coating provided by the application comprises 25-50 parts of film-forming agent, 1-3 parts of curing agent, 5-15 parts of hard nano material, 3-5 parts of antifouling agent, 15-20 parts of diluent and the like. The film forming agent is organic resin, the hard nano material can improve the wear resistance of the hard coating, and the antifouling agent can effectively enhance the antifouling capacity of the film layer. The transparent hard antifouling coating prepared by the method has strong antifouling capacity, and has the characteristics of good transparency, hard texture and environmental friendliness. The coating can be used at normal temperature, is low in cost, can be constructed in various ways such as manual coating and electrostatic spraying, is high in operability, has long-term stable antifouling capacity, is suitable for various fields such as municipal facilities, transportation, mechanical equipment and housing construction, and has a wide market prospect.
Description
Technical Field
The application belongs to the technical field of surface treatment, and particularly relates to a transparent hard antifouling coating and a preparation method and application thereof.
Background
With the continuous advance of the urbanization process, the number of sharing bicycles is increased day by day. The method not only meets daily short-distance travel demands of the masses and relieves urban traffic congestion, but also is an important measure for realizing low-carbon development. However, the shared bicycle running in the road environment for a long time is very susceptible to dust and muddy water, and generates serious pollution. Not only prevents the normal operation of the shared bicycle, but also has adverse effects on the city appearance and the lives of the masses. Therefore, antifouling coatings have received a great deal of attention from researchers. However, the conventional antifouling coating lacks sufficient hardness, and is worn by air flow, sand and soil during use, so that the antifouling performance of the conventional antifouling coating is rapidly reduced, and the conventional antifouling coating is difficult to be applied to antifouling treatment of shared bicycles. In addition, the antifouling coating is required to have transparency so as not to change the coating color of the shared bicycle body itself. The transparent hard antifouling coating has the characteristics of high hardness, good transparency, environmental protection, low price and the like, can be constructed through various ways such as manual painting and electrostatic spraying, and is simple and convenient to operate. The coating has long-term stable antifouling capacity, is suitable for sharing a single vehicle, can be used in various fields of municipal facilities, transportation, mechanical equipment, house construction and the like, and has wide market prospect.
Patent CN201510613912.0 discloses a transparent antifouling coating material for glass, a transparent antifouling coating and a preparation method thereof, wherein a coating with a micro-nano structure is prepared by mixing silica nanoparticles and a low-surface-energy binder at room temperature, and has the characteristics of transparency and antifouling property. The transparent antifouling coating related to the application has no hard and wear-resistant functions and has a narrow application range.
Patent CN201410281714.4 discloses a preparation method of a super-hydrophobic coating, which melts polystyrene nanoparticles to form a microstructure by high-temperature baking (160-230 ℃), and realizes the preparation of the super-hydrophobic coating by using the hydrophobic nanoparticles. However, the preparation process of the method is complex, and high temperature generated in the preparation process can affect a workpiece, so that the method cannot be used for super-hydrophobic treatment of the existing substrate. And simultaneously does not have the wear-resisting function.
Disclosure of Invention
The technical problem to be solved by the application is to overcome the problems that the existing preparation method of the super-hydrophobic coating is complex in operation and harsh in condition and cannot realize the functions of transparency and wear resistance at the same time, and provide a transparent hard antifouling coating and a preparation method thereof.
In order to achieve the purpose, the following technical scheme is adopted in the application:
in a first aspect of the application, a transparent hard antifouling coating is provided, which is composed of a film forming agent, a curing agent, a nano hard material, an antifouling agent and a diluent.
Furthermore, the transparent hard antifouling coating consists of 25-50 parts of film forming agent, 1-3 parts of curing agent, 5-15 parts of hard nano material, 3-5 parts of antifouling agent and 15-20 parts of diluent.
Further, the film forming agent is composed of polyurethane, epoxy resin and acrylic resin.
Further, the curing agent is one of isocyanate, polyether amine and polyamide and a combination thereof.
Furthermore, the hard nano material comprises nano diamond and nano silicon dioxide, and the particle size of the powder is 20-80 nm.
Further, the proportion of the nano-diamond in the hard nano-material is 5% -15% so as to ensure the light transmission and wear resistance of the hard coating.
Further, the antifouling agent is one of hexadecyltrimethylsilane, stearic acid, heptadecafluorodecyltriethoxysilane and a combination thereof.
Further, the diluent is ethanol or isopropanol.
A transparent hard antifouling coating and its preparation method, is made up of film-forming agent 25-50 parts, curing agent 1-3 parts, hard nano-material 5-15 parts, antifouling agent 3-5 parts, thinner 15-30 parts, etc.;
wherein the film forming agent is composed of polyurethane, epoxy resin, acrylic resin and the like, and can form a hard coating after being cured, and the dosage of the hard coating is 25-50 parts;
the curing agent is isocyanate, polyether amine and polyamide, and the using amount of the curing agent is 1-3 parts;
the hard nano material comprises nano diamond and nano silicon dioxide, and the particle size of the powder is 20-80 nm. In order to ensure the light transmission and the wear resistance of the hard coating, the nano diamond accounts for 5 to 15 percent.
The antifouling agent is hexadecyltrimethylsilane, stearic acid and heptadecafluorodecyltriethoxysilane, and the dosage of the antifouling agent is 3-5 parts;
the diluent is volatile alcohol such as ethanol and isopropanol.
In a second aspect of the present application, there is provided a use of the transparent hard anti-fouling coating as described above for improving the wear-resistant function of a substrate, wherein the substrate is a coated metal material.
In a third aspect of the present application, there is provided a method for preparing a transparent hard antifouling coating, wherein the method comprises the following steps:
s1: mixing 5-15 parts of hard nano material, 25-50 parts of film forming agent and 3-5 parts of dispersing agent to obtain a first dispersing solution;
s2: adding 3-5 parts of an antifouling agent into the first dispersion liquid, and fully and uniformly mixing to obtain a second dispersion liquid;
s3: adding 1-3 parts of curing agent into the second dispersion liquid, fully and uniformly mixing, and defoaming to obtain a third dispersion liquid;
s4: and coating the third dispersion liquid on the surface of a substrate, and curing to form a transparent hard antifouling coating.
Further, the hard nano material in S1 is nano diamond and nano silicon dioxide, the particle size of the powder is 20-80 nm, and the proportion of the nano diamond is 5% -15%; the film forming agent is one or more of polyurethane, epoxy resin and acrylic resin; the dispersant is ethanol or isopropanol; the mixing mode is ultrasonic dispersion, magnetic stirring or mechanical stirring.
Further, the antifouling agent in S2 is one or more of hexadecyltrimethylsilane, stearic acid, and heptadecafluorodecyltriethoxysilane, and the mixing mode is ultrasonic dispersion, magnetic stirring or mechanical stirring.
Further, the curing agent in S3 is one or more of isocyanate, polyether amine and polyamide; defoaming after fully and uniformly mixing; the mixing mode is ultrasonic dispersion, magnetic stirring or mechanical stirring; the defoaming mode is standing defoaming or vacuum defoaming.
Further, the coating mode in S4 is manual brushing or electrostatic spraying, and the curing temperature is normal temperature.
The application has the advantages that:
1) The transparent hard antifouling coating prepared by the method has the characteristics of good transparency, hard texture, good wear resistance and environmental friendliness, and can effectively protect a base material;
2) The transparent hard antifouling coating prepared by the method can be constructed in multiple ways such as manual painting and electrostatic spraying, and has strong operability;
3) The transparent hard antifouling coating prepared by the application has long-term stable antifouling capacity, is suitable for various fields such as municipal facilities, transportation, mechanical equipment and housing construction, and has wide market prospect.
Drawings
In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar parts throughout the different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments generally by way of example and not by way of limitation, and together with the description and claims serve to explain the disclosed embodiments. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.
FIG. 1 is a flow chart of a process for preparing a transparent hard antifouling coating.
Fig. 2 is a schematic structural diagram of a transparent hard antifouling coating.
Detailed Description
The following examples are given for the purpose of illustration of the present invention, and the present invention is not limited to the examples. It is within the scope of the present invention to adapt other embodiments to the insubstantial modifications and adaptations of the embodiments set forth above by those skilled in the art based on the teachings of the present invention.
The invention will now be further described with reference to the accompanying drawings.
Fig. 1 is a flow chart of a process for preparing a transparent hard anti-fouling coating, and fig. 2 is a schematic structural diagram of the transparent hard anti-fouling coating prepared based on the process flow shown in fig. 1. The following examples of the present application will combine specific dosage and performance tests to fully illustrate the feasibility and progress of the present application.
Example 1
Preparing a transparent hard antifouling coating by the following steps:
1) Fully mixing 50 parts of epoxy resin, 2 parts of nano diamond, 13 parts of nano silicon dioxide and 30 parts of absolute ethyl alcohol, and fully mixing through ultrasonic dispersion for 30 minutes;
2) Adding 3 parts of stearic acid into the obtained dispersion liquid, and fully mixing through ultrasonic dispersion for 30 minutes;
3) Adding 2 parts of isocyanate curing agent into the dispersion, standing and defoaming for 30 minutes;
4) And coating the obtained mixed dispersion liquid on the surface of the steel with the coating in a manual brushing mode. And naturally drying to obtain the transparent hard antifouling coating.
Through tests, the Contact Angle (CA) of the transparent hard antifouling coating is 162 degrees, the rolling angle (SA) is 4.6 degrees, the visible light transmittance is 92 percent, and the hardness reaches 9H;
example 2
Preparing a transparent hard antifouling coating by the following steps:
1) Fully mixing 50 parts of epoxy resin, 2 parts of nano diamond, 13 parts of nano silicon dioxide and 30 parts of absolute ethyl alcohol, and fully mixing through ultrasonic dispersion for 30 minutes;
2) Adding 3 parts of hexadecyltrimethylsilane into the obtained dispersion, and carrying out ultrasonic dispersion for 30 minutes to fully mix;
3) Adding 2 parts of isocyanate curing agent into the dispersion, standing and defoaming for 30 minutes;
4) And coating the obtained mixed dispersion liquid on the surface of the steel with the coating in a manual brushing mode. And naturally drying to obtain the transparent hard antifouling coating.
Through tests, the Contact Angle (CA) of the transparent hard antifouling coating is 164 degrees, the rolling angle (SA) is 4.3 degrees, the visible light transmittance is 93 percent, and the hardness reaches 9H;
example 3
Preparing a transparent hard antifouling coating by the following steps:
1) Fully mixing 50 parts of acrylic resin, 5 parts of nano diamond, 10 parts of nano silicon dioxide and 30 parts of absolute ethyl alcohol, and fully mixing through ultrasonic dispersion for 30 minutes;
2) Adding 2 parts of heptadecafluorodecane triethoxy decane to the obtained dispersion liquid, and carrying out ultrasonic dispersion for 30 minutes to fully mix;
3) Adding 3 parts of polyamide curing agent into the dispersion, standing and defoaming for 30 minutes;
4) And coating the obtained mixed dispersion liquid on the surface of the steel with the coating in a manual brushing mode. And naturally drying to obtain the transparent hard antifouling coating.
Through tests, the Contact Angle (CA) of the transparent hard antifouling coating is 165 degrees, the rolling angle (SA) is 4.2 degrees, the visible light transmittance is 90 percent, and the hardness reaches 9H;
example 4
Preparing a transparent hard antifouling coating by the following steps:
1) Fully mixing 45 parts of acrylic resin, 3 parts of nano diamond, 12 parts of nano silicon dioxide and 30 parts of isopropanol, and fully mixing after ultrasonic dispersion for 30 minutes;
2) Adding 2 parts of hexadecyltrimethylsilane into the obtained dispersion, and carrying out ultrasonic dispersion for 30 minutes to fully mix;
3) Adding 3 parts of polyether amine curing agent into the dispersion, and standing for defoaming for 30 minutes;
4) And coating the obtained mixed dispersion liquid on the surface of the steel with the coating in a manual brushing mode. And naturally drying to obtain the transparent hard antifouling coating.
Through tests, the Contact Angle (CA) of the transparent hard antifouling coating is 158 degrees, the rolling angle (SA) is 4.6 degrees, the visible light transmittance is 91 percent, and the hardness reaches 8H;
example 5
Preparing a transparent hard antifouling coating by the following steps:
1) Fully mixing 40 parts of polyurethane, 2 parts of nano-diamond, 10 parts of nano-silicon dioxide and 43 parts of isopropanol, and fully mixing after ultrasonic dispersion for 30 minutes;
2) Adding 2 parts of stearic acid into the obtained dispersion liquid, and carrying out ultrasonic dispersion for 30 minutes to fully mix;
3) Adding 3 parts of polyamide curing agent into the dispersion, standing and defoaming for 30 minutes;
4) And coating the obtained mixed dispersion liquid on the surface of the steel with the coating in a manual brushing mode. And naturally drying to obtain the transparent hard antifouling coating.
Through tests, the Contact Angle (CA) of the transparent hard antifouling coating is 155 degrees, the rolling angle (SA) is 4.8 degrees, the visible light transmittance is 87 percent, and the hardness reaches 8H.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. The transparent hard antifouling coating is characterized by comprising a film forming agent, a curing agent, a nano hard material, an antifouling agent and a diluent.
2. The transparent hard antifouling coating according to claim 1, wherein the transparent hard antifouling coating comprises 25 to 50 parts of film forming agent, 1 to 3 parts of curing agent, 5 to 15 parts of hard nanomaterial, 3 to 5 parts of antifouling agent, and 15 to 20 parts of diluent.
3. The transparent hard antifouling coating according to claim 1, wherein the film forming agent is selected from the group consisting of polyurethane, epoxy resin, and acrylic resin.
4. The transparent hard antifouling coating according to claim 1, wherein the curing agent is one of isocyanate, polyetheramine, polyamide and combinations thereof.
5. The transparent hard antifouling coating according to claim 1, wherein the hard nanomaterials comprise nanodiamonds and nanosilicas, each having a powder particle size of 20 to 80nm.
6. The transparent hard antifouling coating according to claim 5, wherein the nano-diamond is present in the hard nanomaterial at a ratio of 5% to 15%.
7. The transparent hard antifouling coating according to claim 1, wherein the antifouling agent is one of hexadecyltrimethylsilane, stearic acid, heptadecafluorodecyltriethoxysilane, and a combination thereof.
8. The transparent hard antifouling coating according to claim 1, wherein the diluent is ethanol or isopropanol.
9. Use of a transparent hard antifouling coating according to any of claims 1 to 8 for improving the wear resistance of a substrate, which is a coated metal material.
10. The method for preparing a transparent hard antifouling coating according to any of claims 1 to 8, wherein the method comprises:
mixing 5-15 parts of hard nano material, 25-50 parts of film forming agent and 3-5 parts of dispersing agent to obtain first dispersion liquid;
adding 3-5 parts of antifouling agent into the first dispersion liquid, and fully and uniformly mixing to obtain a second dispersion liquid;
adding 1-3 parts of curing agent into the second dispersion liquid, fully and uniformly mixing, and defoaming to obtain a third dispersion liquid;
and coating the third dispersion liquid on the surface of a substrate, and curing to form a transparent hard antifouling coating.
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| CN115261154A (en) * | 2022-07-29 | 2022-11-01 | 重庆科技学院 | Rapid graffiti sticker cleaning material, preparation method and application |
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| CN115261154A (en) * | 2022-07-29 | 2022-11-01 | 重庆科技学院 | Rapid graffiti sticker cleaning material, preparation method and application |
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