CN114634725B - Antifouling film for 8K mirror surface stainless steel and preparation method of 8K mirror surface antifouling stainless steel plate - Google Patents
Antifouling film for 8K mirror surface stainless steel and preparation method of 8K mirror surface antifouling stainless steel plate Download PDFInfo
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- 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
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- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
- B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
- B05D2202/15—Stainless steel
Abstract
The invention discloses a preparation method of a stainless steel antifouling film and an 8K mirror surface antifouling stainless steel plate, wherein the raw material of the antifouling film is prepared by compounding a main agent and a solvent, the main agent is a fluorine-containing polymer, and the solvent is a fluoroether solvent; the fluorine-containing polymer main agent comprises fluororesin, hydroxy acrylic resin, amino resin, an auxiliary agent, an antirust agent, a leveling agent, an antifoaming agent, a dispersing agent, a curing agent and a filler; the fluoroether solvent comprises hexafluoropropylene trimer, nonafluoroisobutyl ether, ethyl nonafluorobutyl ether and water. And performing electrolytic polishing, degreasing and deoiling, cleaning, drying, spraying and baking on the stainless steel body to obtain the 8K mirror surface antifouling stainless steel plate. The stainless steel antifouling film layer has strong adhesive force, good hydrophobic and oleophobic effects, weather resistance, chemical resistance and friction resistance, and good ageing resistance and acid-base resistance of the coating film.
Description
Technical Field
The invention belongs to the technical field of stainless steel surface antifouling, and particularly relates to a stainless steel antifouling film and a preparation method of an 8K mirror surface antifouling stainless steel plate.
Background
Stainless steel products are adopted in the existing household appliance industry, high-end kitchen equipment, modern elevators and the like in a large quantity, the cleaning becomes easy due to the unique metal surfaces, but the smooth finish of the stainless steel surface can be damaged by long-time scrubbing, so that stains are more easily accumulated, the metal luster of the surface of the stainless steel plate is gradually lost, and the user experience is reduced. In order to protect stainless steel products from being stained and polluted in the using process, some proper surface treatment processes are usually adopted, for example, the patent publication number of the Shenda decorative material company, henmen, is CN102602079A, and the surface of the stainless steel plate is provided with a coating, but the coating is thicker after the stainless steel plate is cured, so that the glossiness of the surface of the mirror surface stainless steel is influenced, and the shopping experience of people is influenced; the patent publication No. CN105419450A applied by the university of southeast China discloses a high-wear-resistance super-hydrophobic composite coating and a preparation method thereof, the coating process needs to prime a hydrophobic resin, semi-cure the hydrophobic resin and then spray the hydrophobic nano-coating on the surface of the primer, and the process is complex and difficult to apply practically.
Although the nano coating mentioned in the patent can be used for stainless steel, the surface of the stainless steel is divided into a 2B plate, a wire drawing plate, a sand blasting plate and an 8k mirror plate, wherein the surface of the 8k mirror plate is smooth, the common nano coating is difficult to adhere to the surface of the stainless steel, and the nano coating has a short service life even if the nano coating can adhere to the surface of the stainless steel, and the coating can gradually lose efficacy until the mirror surface is scratched in the process of continuously wiping the surface of the stainless steel; if the coating is thick for the purpose of maintaining the life, a white coating film is formed on the mirror surface, which affects the appearance of the mirror surface.
Therefore, it is necessary to develop an antifouling film with strong adhesion, durable antifouling property and 8K mirror surface antifouling stainless steel plate coated with the antifouling film to meet the market demand.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an antifouling film for a stainless steel plate and a preparation method for an antifouling stainless steel plate with an 8K mirror surface.
In order to achieve the above purpose, one of the technical solutions of the present invention is: a stainless steel antifouling film is prepared by compounding a main agent and a solvent, wherein the main agent is a fluorine-containing polymer, and the solvent is a fluoroether solvent; the fluorine-containing polymer main agent comprises fluororesin, hydroxy acrylic resin, amino resin, an auxiliary agent, an antirust agent, a leveling agent, an antifoaming agent, a dispersing agent, a curing agent and a filler; the fluoroether solvent comprises hexafluoropropylene trimer, nonafluoroisobutyl ether, ethyl nonafluorobutyl ether and water.
The antirust agent is carboxylic acid, and the purpose of rust prevention is achieved by neutralizing alkaline components in the cleaning agent;
the leveling agent is acrylic acid, so that the antifouling film can be formed uniformly and naturally;
the antifoaming agent is polyether and mainly plays a role in reducing surface tension;
the dispersant belongs to an organic dispersant and prevents the particles from agglomerating again;
the curing agent is aliphatic polyamine condensate which plays a role of curing resin;
the filler is nano silicon dioxide, has good sagging resistance and workability, greatly improves the anti-contamination property, has excellent self-cleaning property and adhesive force, and is added with SiO 2 Can improve the aging resistance, the smoothness and the strength of the coating.
Furthermore, each component of the antifouling film main agent comprises 5-10 parts by weight of fluororesin, 45-55 parts by weight of hydroxy acrylic resin, 15-20 parts by weight of amino resin, 20-25 parts by weight of auxiliary agent, 0.005-0.01 part by weight of antirust agent, 0.005-0.01 part by weight of flatting agent, 0.005-0.01 part by weight of defoaming agent, 0.01-0.05 part by weight of dispersing agent, 15-20 parts by weight of curing agent and 1-5 parts by weight of filler; the solvent comprises, by weight, 98-99 parts of hexafluoropropylene trimer, 0-1 part of nonafluoroisobutyl ether, 0-1 part of ethyl nonafluorobutyl ether and the balance of water.
Further, the main agent of the antifouling film comprises 6-9 parts by weight of fluororesin, 45-50 parts by weight of hydroxy acrylic resin, 16-20 parts by weight of amino resin, 20-23 parts by weight of auxiliary agent, 0.005-0.01 part by weight of antirust agent, 0.005-0.01 part by weight of flatting agent, 0.005-0.01 part by weight of defoaming agent, 0.01-0.05 part by weight of dispersing agent, 18-20 parts by weight of curing agent and 1-4 parts by weight of filler; the solvent comprises, by weight, 98-99 parts of hexafluoropropylene trimer, 0-1 part of nonafluoroisobutyl ether, 0-1 part of ethyl nonafluorobutyl ether and the balance of water.
Further, the main agent of the antifouling film comprises 7-9 parts by weight of fluororesin, 45-48 parts by weight of hydroxy acrylic resin, 18-20 parts by weight of amino resin, 20-22 parts by weight of auxiliary agent, 0.005-0.01 part by weight of antirust agent, 0.005-0.01 part by weight of flatting agent, 0.005-0.01 part by weight of defoaming agent, 0.01-0.05 part by weight of dispersing agent, 18-19 parts by weight of curing agent and 1-3 parts by weight of filler; the solvent comprises, by weight, 98-99 parts of hexafluoropropylene trimer, 0-1 part of nonafluoroisobutyl ether, 0-1 part of ethyl nonafluorobutyl ether and the balance of water.
Further, the weight ratio of the antifouling film main agent to the solvent is 3-5. When preparing, mixing in a clean room at low temperature and low humidity, i.e. the temperature is controlled at 20-24 ℃, the relative humidity is controlled at 55-60% RH, and then shaking for 1-2min to fully mix.
The utility model provides an antifouling corrosion resistant plate of 8K mirror surface, includes stainless steel 8K mirror surface board body and coats the antifouling film on the mirror surface board body, antifouling film forms for the compounded coating of principal agent and solvent.
In order to achieve the above purpose, the second technical solution of the present invention is: a preparation method of an 8K mirror surface antifouling stainless steel plate coated with a stainless steel antifouling film specifically comprises the following steps:
the method comprises the following steps: electrolytic polishing: performing electrolytic polishing on the stainless steel body until the surface roughness Ra is 0.1-0.2 mu m;
step two: degreasing and deoiling: soaking the polished 8K mirror surface stainless steel sample wafer in an ultrasonic cleaning tank filled with an alkaline assistant and a surfactant, and cleaning for 15-30min to ensure that the mirror surface is not scratched;
step three: cleaning: washing the degreased and deoiled stainless steel sample piece by using deionized water or clean water for a proper time without residual cleaning agent; ensuring that the static contact angle of the mirror surface is 93-97 degrees;
step four: and (3) drying: placing the cleaned mirror surface stainless steel sample in a baking furnace for hot air drying for 10-20min, wherein the surface of the mirror surface should be free of water stains after drying;
step five: spraying: in a dust-free room, the compounded nano coating is atomized by a normal pressure type spray gun and then evenly sprayed on the surface of the mirror surface stainless steel, and the working distance is 10-20cm;
step six: baking: and placing the mirror surface stainless steel after spraying in a well-heated bread oven for baking.
Further, in the sixth step, the baking temperature is 150-180 ℃, and the baking time is 30-40min.
Compared with the prior art, the invention has the beneficial effects that:
1. the fluorine resin in the main agent of the invention has C-F bond and steric hindrance brought by the large fluorine atom volume, so that the stability of the main chain is greatly increased; the fluororesin is added into the acrylic resin, so that the hardness and the glossiness of the film can be adjusted, and the ultraviolet resistance of the coating film can be improved; namely, the more the content of the fluororesin is, the more excellent the weather resistance, chemical resistance and corrosion resistance are, and the relative cost is also high; according to the invention, by adjusting the addition amounts of the fluororesin and the acrylic resin, the antifouling film not only has the characteristics of light and color retention, quick drying property and high hardness of the acrylic resin, but also has the characteristics of durability, chemical resistance and pollution resistance of the fluororesin.
2. According to the invention, hexafluoropropylene tripolymer serving as a main component of a solvent is blended with a fluorine-containing polymer main agent and then can be used as a comonomer with acrylic resin in the hexafluoropropylene tripolymer, so that the space of the whole structure is enlarged, the branched chain structure of the polymer is more complete, stainless steel contains a plurality of metal elements, the stainless steel can react with O after contacting with air for a long time, oxide on the surface of a mirror surface can react with water in the air, hydroxyl is generated on the surface of the mirror surface, more hydroxyl is exposed on the surface of the cleaned stainless steel, and Si elements in the branched chain structure in the polymer can be firmly combined with the hydroxyl on the surface of the metal to form Si-O bonds by spraying at a spraying distance of 15-20cm, so that the adhesion between fluororesin and a substrate is increased, and the antifouling film has excellent waterproof and oilproof properties.
3. The nonafluoroisobutyl ether and the ethyl nonafluorobutyl ether in the solvent belong to hydrofluoroether substances, the ozone loss potential of the nonafluorobutyl ether is 0, the nonafluoroisobutyl ether is almost nontoxic and is not classified as a volatile organic compound, and the nonafluorobutyl ether has the outstanding advantages that the nonafluoroisobutyl ether and the ethyl nonafluorobutyl ether are used as green environment-friendly substances and have 0 harm to human bodies and environment, and the nonafluoroisobutyl ether and the ethyl nonafluorobutyl ether are colorless and transparent liquid with low viscosity, difficult combustion and very high safety. Meanwhile, the nonafluoroisobutyl ether pure substance has excellent chemical stability in strong acid and strong alkali environments, the structure of the nonafluoroisobutyl ether pure substance is not changed after the nonafluoroisobutyl ether pure substance is strongly corroded by high-temperature concentrated acid and concentrated alkali, and the nonafluoroisobutyl ether is added into the coating film, so that the film has the advantage of environmental protection and is more suitable for the requirements of severe environments.
4. After the stainless steel antifouling film prepared by the invention is sprayed on an 8K mirror panel and is circulated for 2000 times by using a pig hair brush, the super-hydrophobicity of the film layer is unchanged, and the film layer has good hydrophobic and oleophobic effects, weather resistance, chemical resistance and friction resistance; the coating film has good aging resistance and acid-base performance, and the appearance and the color of the film layer are not obviously changed after the xenon lamp aging test.
5. The preparation method of the invention has simple used equipment and process, simple operation and low cost, and is suitable for large-scale production.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in more detail with reference to specific examples, but the scope of the present invention is not limited to these examples.
A stainless steel antifouling film comprises a main agent and a solvent, wherein the main agent comprises 5-10 parts by weight of fluororesin, 45-55 parts by weight of hydroxy acrylic resin, 15-20 parts by weight of amino resin, 20-25 parts by weight of an auxiliary agent, 0.005-0.01 part by weight of an antirust agent, 0.005-0.01 part by weight of a flatting agent, 0.005-0.01 part by weight of a defoaming agent, 0.01-0.05 part by weight of a dispersing agent, 15-20 parts by weight of a curing agent and 1-5 parts by weight of a filler; the solvent comprises 98-99 parts of hexafluoropropylene tripolymer, 0-1 part of nonafluoroisobutyl ether, 0-1 part of ethyl nonafluorobutyl ether and the balance of water in parts by weight; the weight ratio of the antifouling film main agent to the solvent is 3-5.
A preparation method of an 8K mirror surface antifouling stainless steel plate coated with an antifouling film specifically comprises the following steps:
(1) Carrying out electrolytic polishing on the stainless steel body until the surface roughness Ra is 0.1-0.2 mu m;
(2) Soaking the polished 8K mirror surface stainless steel sample wafer in an ultrasonic cleaning tank filled with an alkaline assistant and a surfactant, and cleaning for 15-30min to ensure that the mirror surface is not scratched;
(3) Washing the degreased and deoiled stainless steel sample piece by using deionized water or clean water for a proper time without residual cleaning agent; ensuring that the static contact angle of the mirror surface is 93-97 degrees;
(4) Placing the cleaned mirror surface stainless steel sample in a baking furnace for hot air drying for 10-20min, wherein the surface of the mirror surface should be free of water stains after drying;
(5) In a dust-free room, the compounded nano coating is atomized by a normal pressure type spray gun and then uniformly sprayed on the surface of the mirror surface stainless steel, and the optimal working distance is 10-20cm;
(6) And placing the sprayed mirror surface stainless steel in a well-heated bread oven for baking at the baking temperature of 150-180 ℃ for 30-40min.
The auxiliary agents used in the following examples are film-forming agents, and NFA-995 can be selected; the leveling agent is organosilicon leveling agent, and can be MS-132, FLOW300 or SER-AD FX100 leveling agent; the defoaming agent can be 7010,7501 or X-01, and the dispersing agent can be EFKA-765, EFKA-701 or EFKA-66; the antirust agent is prepared by mixing maleic acid-acrylic acid copolymer and phytic acid ester; the curing agent may be polyamide 650 or 651; the filler is nano silicon dioxide.
Example 1
The stainless steel antifouling film comprises, by weight, 50 parts of hydroxy acrylic resin, 15 parts of amino resin, 20 parts of an auxiliary agent, 0.005 part of an antirust agent, 0.005 part of a leveling agent, 0.005 part of a defoaming agent, 0.01 part of a dispersing agent, 20 parts of a curing agent, 3 parts of a nano silica filler, and the parts by weight of a fluororesin in a main agent and a hexafluoropropylene trimer, nonafluoroisobutyl ether and ethyl nonafluorobutyl ether in a solvent are shown in Table 1. The components are mixed and shaken for 1.5min under the environment that the temperature of a dust-free room is 22 ℃ and the relative humidity is controlled to be 58 percent RH, and then the components are fully mixed to obtain the nano coating, wherein the weight ratio of the antifouling film main agent to the solvent is 4;
an 8K mirror surface antifouling stainless steel plate is prepared according to the following steps:
(1) Carrying out electrolytic polishing on the stainless steel body until the surface roughness Ra is 0.1-0.2 mu m;
(2) Soaking the polished 8K mirror surface stainless steel sample wafer in an ultrasonic cleaning tank filled with an alkaline assistant and a surfactant, and cleaning for 15min to ensure that the mirror surface is not scratched;
(3) Washing the degreased and deoiled stainless steel sample piece with deionized water for 10min; ensuring that the static contact angle of the mirror surface is 95 degrees;
(4) Placing the cleaned mirror surface stainless steel sample wafer in a baking furnace for hot air drying for 10min, wherein the surface of the mirror surface should be free of water stains after drying;
(5) In a dust-free room, the nano coating compounded according to the components of the stainless steel antifouling film is atomized by a normal pressure type spray gun and then evenly sprayed on the surface of the mirror surface stainless steel, and the working distance is 15cm;
(6) And placing the sprayed mirror surface stainless steel in a well-heated bread oven for baking at the baking temperature of 150 ℃ for 30min to obtain the 8K mirror surface antifouling stainless steel plate.
Example 2
Specifically, the stainless steel antifouling film has the components shown in table 1, wherein the components of the film are the same as those in example 1 except for the weight parts of fluororesin, hexafluoropropylene trimer, nonafluoroisobutyl ether and ethylnonafluorobutyl ether in example 1. The components are mixed and shaken for 1.5min under the environment that the temperature of a dust-free room is 22 ℃ and the relative humidity is controlled to be 58 percent RH, and then the components are fully mixed to obtain the nano coating, wherein the weight ratio of the antifouling film main agent to the solvent is 3;
an 8K mirror surface antifouling stainless steel plate was produced by the production method in example 1.
Example 3
Specifically, the stainless steel antifouling film has the components shown in table 1, wherein the components of the film are the same as those in example 1 except for the weight parts of fluororesin, hexafluoropropylene trimer, nonafluoroisobutyl ether and ethylnonafluorobutyl ether in example 1. Compounding and mixing the components in a clean room temperature of 22 ℃ and a relative humidity controlled in an environment of 58% RH, and then shaking for 1.5min to fully mix the components to obtain the nano coating, wherein the weight ratio of the antifouling film main agent to the solvent is 4;
an 8K mirror surface antifouling stainless steel plate was produced by the production method in example 1.
Comparative example 1
Specifically, the stainless steel antifouling film has the components shown in table 1, wherein the components of the film are the same as those in example 1 except for the weight parts of fluororesin, hexafluoropropylene trimer, nonafluoroisobutyl ether and ethylnonafluorobutyl ether in example 1. The components are mixed and shaken for 1.5min under the environment that the temperature of a dust-free room is 22 ℃ and the relative humidity is controlled to be 58 percent RH, and then the components are fully mixed to obtain the nano coating, wherein the weight ratio of the antifouling film main agent to the solvent is 4;
an 8K mirror surface antifouling stainless steel plate was produced by the production method in example 1.
Comparative example 2
Specifically, the stainless steel antifouling film has the components shown in table 1, wherein the components of the film are the same as those in example 1 except for the weight parts of fluororesin, hexafluoropropylene trimer, nonafluoroisobutyl ether and ethylnonafluorobutyl ether in example 1. Compounding and mixing the components in a clean room temperature of 22 ℃ and a relative humidity controlled in an environment of 58% RH, and then shaking for 1.5min to fully mix the components to obtain the nano coating, wherein the weight ratio of the antifouling film main agent to the solvent is 3;
an 8K mirror surface antifouling stainless steel plate was produced by the production method in example 1.
Comparative example 3
Specifically, as shown in table 1, the components of the stainless steel antifouling film are the same as those in example 1 except for the parts by weight of the fluororesin, the hexafluoropropylene trimer, the nonafluoroisobutyl ether, and the ethylnonafluorobutyl ether. The components are mixed and shaken for 1.5min under the environment that the temperature of a dust-free room is 22 ℃ and the relative humidity is controlled to be 58 percent RH, and then the components are fully mixed to obtain the nano coating, wherein the weight ratio of the antifouling film main agent to the solvent is 4;
an 8K mirror surface antifouling stainless steel plate was produced by the production method in example 1.
Comparative example 4
Specifically, the stainless steel antifouling film has the components shown in table 1, wherein the components of the film are the same as those in example 1 except for the weight parts of fluororesin, hexafluoropropylene trimer, nonafluoroisobutyl ether and ethylnonafluorobutyl ether in example 1. The components are mixed and shaken for 1.5min under the environment that the temperature of a dust-free room is 22 ℃ and the relative humidity is controlled to be 58 percent RH, and then the components are fully mixed to obtain the nano coating, wherein the weight ratio of the antifouling film main agent to the solvent is 5;
an 8K mirror surface antifouling stainless steel plate was produced by the production method in example 1.
Comparative example 5
Specifically, as shown in table 1, the components of the stainless steel antifouling film are the same as those in example 1 except for the parts by weight of the fluororesin, the hexafluoropropylene trimer, the nonafluoroisobutyl ether, and the ethylnonafluorobutyl ether. Compounding and mixing the components in a clean room temperature of 22 ℃ and a relative humidity controlled in an environment of 58% RH, and then shaking for 1.5min to fully mix the components to obtain the nano coating, wherein the weight ratio of the antifouling film main agent to the solvent is 2;
an 8K mirror surface antifouling stainless steel plate was produced by the production method in example 1.
Comparative example 6
Specifically, the stainless steel antifouling film has the components shown in table 1, wherein the components of the film are the same as those in example 1 except for the weight parts of fluororesin, hexafluoropropylene trimer, nonafluoroisobutyl ether and ethylnonafluorobutyl ether in example 1. Compounding and mixing the components in a clean room at 22 ℃ and with relative humidity controlled at 58% RH, and shaking for 1.5min to fully mix the components to obtain the nano coating, wherein the weight ratio of the antifouling film main agent to the solvent is 6;
an 8K mirror surface antifouling stainless steel plate was produced by the production method in example 1.
TABLE 1 different compositions of antifouling films of examples 1-3 and comparative examples 1-4
| Components | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | Comparative example 6 |
| Fluororesin | 6 | 7 | 9 | 3 | 8 | 6 | 8 | 6 | 7 |
| Hexafluoropropylene trimer | 98 | 98 | 99 | 99 | 80 | 98 | 99 | 99 | 98 |
| Nonafluoroisobutyl Ether | 0.1 | 0.4 | 0.7 | 0.7 | 0.4 | 2 | 0.9 | 0.1 | 0.5 |
| Ethyl nonafluorobutyl Ether | 0.2 | 0.5 | 0.8 | 0.6 | 0.8 | 0.7 | 2 | 0.1 | 0.5 |
Test pieces were taken from arbitrary positions of the 8K mirror surface antifouling stainless steel sheets produced in examples 1 to 3 and comparative examples 1 to 6 to observe the appearance of the coating and to test the properties, and the results are shown in Table 2. Wherein:
initial contact angle/degree was determined by an OCA40 Micro contact angle tester, produced in germany;
the pencil hardness is measured by GB/T6739-2006 Standard/method;
the grid test is measured by GB/T9286-2021 standard/method;
alkali resistance (5% sodium hydroxide) was determined by GB/T27710-2020 Standard/method;
acid resistance (10% acetic acid concentration) was determined by product standard QJMJCP 010009-2022 standard/method;
the contact angle/degree xenon lamp aging after 2000 times of the pig hair brush is determined according to GB/T1865-2009;
the film thickness was measured by a hand-held film thickness meter (manufactured by chen platen, chin crown mechanical science and technology, ltd., product number H11393).
Table 2: results of Performance test of examples 1 to 3 and comparative examples 1 to 4
The results of the tests in Table 2 show that the cleaning property, acid resistance, alkali resistance, and pig hair brush resistance of example 1 are excellent in all properties. In the embodiment 1, the initial contact angle is 111 degrees, the hydrophobic property is good, the contact angle is 108 degrees after the pig hair brush is scrubbed for 2000 times under the load condition of 500g +/-10 g of weights, and the acid and alkali resistance is outstanding.
The antifouling films of examples 1-3 are prepared from the main agent and the solvent according to the weight ratio of 3-5; in the comparative example 6, according to the mixture ratio of the main agent to the solvent of 6, 1200 is higher than that of the example, the mirror surface becomes whitish after spraying, the appearance of the mirror surface is influenced, and the contact angle is 96 degrees after 2000 times of the pig brush, and the antifouling film is in a state of about to lose efficacy.
Comparative example 1 the addition of fluororesin was low, the antifouling film had low hardness and poor alkali resistance; after 2000 times of tests of the pig hair brush, the contact angle is 90 degrees and is 95 degrees lower than the contact angle of the original mirror surface, namely the antifouling film is completely ineffective;
in comparative example 2, due to the fact that the addition amount of hexafluoropropylene trimer is low, the adhesion force is poor in the coating hundred-grid test, and therefore after the pig hair brush resistance test, the contact angle is 95 degrees lower than the self-carried contact angle of a mirror surface, and the abrasion resistance is poor.
Comparative examples 3 and 4 have unstable acid and alkali resistance and white marks due to the addition of a large amount of nonafluoroisobutyl ether and ethylnonafluorobutyl ether. After 2000 times of the pig brush, the contact angle is not much different from the original mirror surface, namely the antifouling film is in an imminent failure state.
According to the embodiment, the anti-fouling film with high adhesion, good acid and alkali resistance and friction resistance on the mirror surface is obtained by setting the addition amount of the solute such as the fluororesin and the solvent, is highly transparent, has no influence on the appearance of the mirror surface, and obtains balanced comprehensive performance.
The above embodiments are merely preferred embodiments of the present invention, which are provided for illustrating the principles and effects of the present invention and not for limiting the present invention. It should be noted that modifications to the above-described embodiments can be made by persons skilled in the art without departing from the spirit and scope of the invention, and such modifications should also be considered as within the scope of the invention.
Claims (8)
1. An antifouling film for 8K mirror surface stainless steel is characterized in that raw materials of the antifouling film are mainly compounded by a main agent and a solvent, wherein the main agent is a fluorine-containing polymer, and the solvent is a fluoroether solvent; the fluorine-containing polymer main agent comprises fluororesin, hydroxy acrylic resin, amino resin, an auxiliary agent, an antirust agent, a leveling agent, an antifoaming agent, a dispersing agent, a curing agent and a filler; the fluoroether solvent comprises hexafluoropropylene trimer, nonafluoroisobutyl ether, ethyl nonafluorobutyl ether and water; the main agent comprises 5-10 parts by weight of fluororesin, 45-55 parts by weight of hydroxy acrylic resin, 15-20 parts by weight of amino resin, 20-25 parts by weight of auxiliary agent, 0.005-0.01 part by weight of antirust agent, 0.005-0.01 part by weight of flatting agent, 0.005-0.01 part by weight of defoaming agent, 0.01-0.05 part by weight of dispersing agent, 15-20 parts by weight of curing agent and 1-5 parts by weight of filler; the solvent comprises, by weight, 98-99 parts of hexafluoropropylene trimer, 0-1 part of nonafluoroisobutyl ether, 0-1 part of ethyl nonafluorobutyl ether and the balance of water; the weight ratio of the main agent to the solvent is 3-5.
2. The antifouling film according to claim 1, wherein the main agent comprises 6 to 9 parts by weight of fluororesin, 45 to 50 parts by weight of hydroxy acrylic resin, 16 to 20 parts by weight of amino resin, 20 to 23 parts by weight of an auxiliary agent, 0.005 to 0.01 part by weight of a rust inhibitor, 0.005 to 0.01 part by weight of a leveling agent, 0.005 to 0.01 part by weight of a defoaming agent, 0.01 to 0.05 part by weight of a dispersant, 18 to 20 parts by weight of a curing agent, and 1 to 4 parts by weight of a filler; the solvent comprises, by weight, 98-99 parts of hexafluoropropylene trimer, 0-1 part of nonafluoroisobutyl ether, 0-1 part of ethyl nonafluorobutyl ether and the balance of water.
3. The antifouling film according to claim 1, wherein the main agent comprises, by weight, 7 to 9 parts of a fluororesin, 45 to 48 parts of a hydroxy acrylic resin, 18 to 20 parts of an amino resin, 20 to 22 parts of an auxiliary agent, 0.005 to 0.01 part of a rust inhibitor, 0.005 to 0.01 part of a leveling agent, 0.005 to 0.01 part of a defoaming agent, 0.01 to 0.05 part of a dispersant, 18 to 19 parts of a curing agent, and 1 to 3 parts of a filler; the solvent comprises, by weight, 98-99 parts of hexafluoropropylene trimer, 0-1 part of nonafluoroisobutyl ether, 0-1 part of ethyl nonafluorobutyl ether and the balance of water.
4. An 8K mirror surface antifouling stainless steel sheet coated with the antifouling film as claimed in any one of claims 1 to 3.
5. A method for manufacturing an 8k mirror surface antifouling stainless steel plate according to claim 4, comprising the steps of:
(1) Electrolytic polishing: performing electrolytic polishing on the stainless steel body until the surface roughness Ra is 0.1-0.2 mu m;
(2) Degreasing and deoiling: soaking the polished 8K mirror surface stainless steel sample wafer in the step (1) in an ultrasonic cleaning tank filled with an alkaline assistant and a surfactant, and cleaning for 15-30min;
(3) Cleaning: washing the degreased and deoiled mirror surface stainless steel sample piece with deionized water or clean water for 10-15min to ensure that no cleaning agent remains on the surface and ensure that the static contact angle of the mirror surface is 93-97 ℃;
(4) And (3) drying: placing the mirror surface stainless steel sample wafer cleaned in the step (3) in a baking furnace for hot air drying;
(5) Spraying: compounding the raw material components of the antifouling film in a dust-free room to obtain a nano coating, atomizing the nano coating by using a normal pressure type spray gun, and then uniformly spraying the atomized nano coating on the surface of the mirror surface stainless steel;
(6) Baking: and (4) placing the mirror surface stainless steel sprayed in the step (5) in a well-heated baker for baking to obtain the mirror surface antifouling stainless steel plate.
6. The method according to claim 5, wherein the drying time in the step (4) is 10 to 20min.
7. The method according to claim 5, wherein the working distance between the normal pressure type spray gun and the surface of the mirror surface stainless steel in the step (5) is 10-20cm.
8. The method according to claim 5, wherein the baking temperature in the step (6) is 150-180 ℃ and the baking time is 30-40min.
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