Stainless steel plate based on water paint and application of stainless steel plate

Abstract

The invention relates to the technical field of stainless steel plates, and discloses a stainless steel plate based on water paint and application of the stainless steel plate. The water-based paint comprises the following raw materials: methyl methacrylate, butyl acrylate, hydroxyethyl methylacrylate, acrylic acid, an antifouling modified component, an emulsifier, deionized water, an initiator, an inorganic modified additive, a pigment filler, a coalescing agent, a flatting agent and a defoaming agent. Wherein the antifouling modification component is prepared by preparing a hydroxyl fluorosilicone oil derivative of which the structure contains a siloxane chain segment, a fluorine-containing chain segment and a long alkyl chain; the inorganic modified additive is prepared by chemically connecting natamycin to the surface of titanium dioxide, the stainless steel plate prepared through the method has excellent antifouling performance and antibacterial and mildew-proof performance, and the market competitiveness is improved.

Description

Technical Field

[0001] The invention relates to the technical field of stainless steel plates, and in particular to a stainless steel plate based on water-based paint and application thereof. Background Art

[0002] Stainless steel plate is a kind of alloy steel that is not easy to rust. It has the advantages of corrosion resistance, high temperature resistance, high strength, and wear resistance. It is often used to make kitchen cabinets. The kitchen is a place where oil stains, water stains and food residues are easily generated. During the cooking process, oil smoke, seasonings, sewage, etc. are easy to splash onto the surface of the cabinet. If the surface of the stainless steel plate does not have anti-fouling properties, these stains will quickly adhere and be difficult to clean. In the long run, it will not only affect the appearance, but also may breed bacteria, posing a threat to food safety and the health of family members. In addition, since the cabinets are in a humid and hot environment for a long time, it is easy to breed bacteria and mildew, which will not only destroy the aesthetic effect of the stainless steel plate, but also pose a potential threat to people's health.

[0003] In order to protect stainless steel plates and extend their service life, the most common method is to spray paint on their surface to enhance their anti-fouling and antibacterial and mildew-proof properties. As people's environmental awareness increases, consumers, while pursuing product practicality, also begin to pay attention to whether the product has special properties such as environmental protection. Among them, water-based paint uses water as a solvent to reduce the use of harmful organic solvents and reduce potential harm to the environment and human health. In order to make water-based paint have anti-fouling and antibacterial and mildew-proof properties, adding additives with anti-fouling and antibacterial and mildew-proof properties during the production of water-based paint has become a hot research topic in the field of water-based paint.

[0004] The invention patent with announcement number CN106801229B discloses a method for preparing an antibacterial stainless steel plate. The invention forms a dense film on the surface of the stainless steel by immersing the stainless steel plate in treatment liquid A first and then in treatment liquid B, so that the prepared stainless steel plate has significant antibacterial properties. The killing rate of pathogenic bacteria such as Escherichia coli and Staphylococcus aureus is above 98%, and the stainless steel plate is not easy to wear and has good corrosion resistance. However, the invention does not improve the anti-fouling performance of the treatment liquid on the surface of the stainless steel plate. Summary of the invention

[0005] In order to solve the problems mentioned in the background technology, the object of the present invention is to provide a stainless steel plate based on water-based paint and application thereof.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A stainless steel plate based on water-based paint, which is made by spraying water-based paint on the surface of the stainless steel plate; the water-based paint comprises the following raw materials in parts by weight: 30 to 40 parts of methyl methacrylate, 20 to 30 parts of butyl acrylate, 15 to 25 parts of hydroxyethyl methacrylate, 10 to 20 parts of acrylic acid, 4 to 8 parts of antifouling modification components, 2 to 4 parts of emulsifiers, 30 to 40 parts of deionized water, 1 to 3 parts of initiators, 3 to 6 parts of inorganic modification additives, 5 to 15 parts of pigments and fillers, 1 to 2 parts of film-forming aids, 1 to 3 parts of leveling agents, and 2 to 3 parts of defoaming agents.

[0008] Furthermore, the preparation method of the antifouling modified component comprises the following steps:

[0009] Add hydroxy fluorosilicone oil and dimethyl sulfoxide solution into the reactor, stir mechanically and evenly, pass nitrogen, expel the air, add maleic anhydride, stir at room temperature for 3 to 6 hours, then add long alkyl alcohol and catalyst, raise the system temperature to 90 to 110°C under stirring conditions, keep warm for 4 to 8 hours, remove the solvent by reduced pressure distillation, discharge the material, and obtain the antifouling modified component.

[0010] Furthermore, the hydroxyl content in the hydroxy fluorosilicone oil is 0.05-1.0 mol%.

[0011] Furthermore, the long alkyl alcohol is any one of dodecanol, tetradecanol or octadecyl alcohol.

[0012] Furthermore, the catalyst is any one of p-toluenesulfonic acid, aminosulfonic acid or trifluoromethanesulfonic acid.

[0013] Technical principle: In step A1, under the action of p-toluenesulfonic acid, the hydroxyl group in the structure of hydroxyfluorosilicone oil undergoes a ring-opening esterification reaction with maleic anhydride, thereby introducing active carboxyl groups produced by the ring-opening esterification reaction into the structure of hydroxyfluorosilicone oil to obtain modified hydroxyfluorosilicone oil; in step A2, the carboxyl group in the structure of modified hydroxyfluorosilicone oil can undergo an esterification reaction with the hydroxyl group in the structure of dodecanol under the action of p-toluenesulfonic acid, thereby grafting dodecanol into the structure of hydroxyfluorosilicone oil to obtain an anti-fouling modified component.

[0014] Furthermore, the preparation method of the inorganic modified additive comprises the following steps:

[0015] Step AA1: titanium dioxide is mixed with a toluene solution, ultrasonically dispersed for 25 to 35 minutes, diacyl chloride monomer and sodium hydroxide solution are added, and after the addition is completed, the mixture is stirred at room temperature for 3 to 6 hours, and the material is separated and collected to obtain modified titanium dioxide;

[0016] Step AA2: Add modified titanium dioxide and N,N-dimethylformamide to a nitrogen-protected reactor, stir evenly, then continue to add natamycin and sodium hydroxide solution to the reactor, turn on the heating, wait for the temperature to rise to 60-70°C, stir at a constant temperature for 4-9 hours, filter, collect the product, wash, and dry to obtain an inorganic modified additive.

[0017] Furthermore, in step AA1, the diacyl chloride monomer is any one of succinyl chloride, glutaryl chloride or adipoyl chloride.

[0018] Furthermore, in step AA2, the mass ratio of the modified titanium dioxide to natamycin is 1:0.1-0.4.

[0019] Technical principle: In step AA1, under the action of sodium hydroxide solution, the acyl chloride group at one end of the glutaryl chloride structure can react with the hydroxyl group on the surface of titanium dioxide, and the acyl chloride group is modified on the surface of titanium dioxide to obtain modified titanium dioxide; in step AA2, by utilizing the high reactivity of the acyl chloride group, under the action of sodium hydroxide solution, it can further undergo an amidation reaction with the amino group in the natamycin structure, thereby chemically connecting natamycin to the surface of titanium dioxide to obtain an inorganic modified additive.

[0020] Furthermore, the stainless steel plate is prepared by the following method:

[0021] Step 1: Prepare water-based paint

[0022] Ⅰ: Add methyl methacrylate, butyl acrylate, hydroxyethyl methacrylate, acrylic acid, antifouling modification component, emulsifier and deionized water into a stirring kettle, pass nitrogen, exhaust air, then add initiator into the stirring kettle, after adding, raise the system temperature to 70-80°C, stir and mix at a stirring rate of 400-600 r / min for 1-3 hours to obtain a prepolymer emulsion;

[0023] Ⅱ: Add inorganic modified additives, pigments and fillers, film-forming aids, leveling agents and defoamers to the prepolymer emulsion, stir evenly mechanically, and let stand to defoam to obtain a water-based paint;

[0024] Step 2: Prepare stainless steel plate

[0025] Soak the 304 stainless steel plate in the degreasing liquid for 20 to 40 minutes, take it out, rinse the surface of the stainless steel, then spray the water-based paint evenly on the surface of the stainless steel plate, and dry it to obtain stainless steel.

[0026] The invention discloses an application of a stainless steel plate based on water-based paint, wherein the stainless steel plate is applied in the field of kitchen cabinets.

[0027] Beneficial effects of the present invention:

[0028] (1) The present invention prepares a water-based paint containing an antifouling modification component and an inorganic modification additive, which can be directly sprayed on the surface of a stainless steel plate, so that the prepared stainless steel plate has good antifouling and antibacterial properties, which can not only improve the decorative effect of the stainless steel plate, but also protect the stainless steel plate, thereby improving its practicality and aesthetics in the field of kitchen integrated cabinets, and effectively improving the market competitiveness of the stainless steel plate.

[0029] (2) The present invention prepares an antifouling modified component as a filler modifier for water-based paint. Since the antifouling modified component contains unsaturated olefin groups in its structure, it can participate in the cross-linking process of the base material to form a dense cross-linked network structure, which effectively blocks the penetration and adhesion of pollutants such as oil smoke, seasonings, and sewage, thereby improving the antifouling performance of the water-based paint. The high cross-linking density and strong interfacial bonding force also help to maintain the integrity and aesthetics of the coating, so that the antifouling effect can be maintained for a long time. In addition, the structure of the antifouling modified component also contains highly hydrophobic siloxane segments, fluorine-containing segments and long alkyl chains. The components produce a synergistic effect, so that the surface energy of the prepared water-based paint is relatively low. During the preparation process of the water-based paint, it will be freed to the surface and can form a super-hydrophobic barrier on the surface, making it difficult for pollutants to penetrate into the water-based paint, giving the water-based paint good anti-fouling ability, preventing stains from adhering to the surface of the stainless steel plate, posing a threat to food safety and the health of family members. In addition, the antifouling modified component is easy to clean, further enhancing the decorative effect of the water-based paint on the stainless steel plate.

[0030] (3) The present invention obtains an inorganic modified additive by chemically linking natamycin to the surface of titanium dioxide. By organically modifying the surface of titanium dioxide, its dispersibility in the matrix can be improved, making it less likely to agglomerate during use. On the one hand, the titanium dioxide in the inorganic modified additive will generate photogenerated electrons and holes with high reactivity under the irradiation of light, which can have a destructive effect on the cell wall or membrane structure of bacteria, achieving the purpose of sterilization, so that the prepared water-based paint has excellent antibacterial properties. On the other hand, the natamycin in the inorganic modified additive can react with the sterol compounds in the cell membrane to affect its permeability, and can effectively inhibit the growth of molds, etc., significantly improving the anti-mildew performance of the water-based paint, and preventing the stainless steel plate from being in a humid and hot environment for a long time, breeding bacteria and mildew, which poses a potential threat to people's health.

[0031] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0033] Figure 1 This is an infrared spectrum test chart of the antifouling modified component prepared in Example 1 of the present invention.

[0034] Figure 2 This is an infrared spectrum test chart of the modified titanium dioxide and inorganic modified additives prepared in Example 1 of the present invention. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1

[0037] 1. Preparation of antifouling modified components

[0038] Add 5g of hydroxyl fluorosilicone oil with a hydroxyl content of 0.08mol% and dimethyl sulfoxide solution into the reactor, stir mechanically for uniformity, pass nitrogen, expel the air, add 1g of maleic anhydride, stir at room temperature for 5h, then add 1.4g of dodecanol and 0.08g of p-toluenesulfonic acid, raise the system temperature to 100°C under stirring conditions, keep warm for 6h, remove the solvent by reduced pressure distillation, and discharge the material to obtain an anti-fouling modified component.

[0039] The antifouling modified components were analyzed by infrared spectroscopy using a Nicolet 170sx Fourier transform infrared spectrometer. Figure 1 As shown by Figure 1 It can be seen that 1221cm -1 The absorption peak of CF appears at 1260 cm -1 The absorption peak of SiC appears at 1740 cm -1 The absorption peak of the ester group C=O appears at 3012 cm -1 The absorption peak of the carbon-hydrogen bond in the carbon-carbon double bond appears at .

[0040] 2. Preparation of Inorganic Modified Additives

[0041] Step AA1: 6 g of titanium dioxide was mixed with a toluene solution, and ultrasonically dispersed for 30 min. 1.2 g of glutaryl chloride and 0.05 g of a 50% sodium hydroxide solution were added. After the addition was completed, the mixture was stirred at room temperature for 5 h. The material was separated and collected to obtain modified titanium dioxide.

[0042] Step AA2: Add 6 g of modified titanium dioxide and N,N-dimethylformamide to a nitrogen-protected reactor, stir evenly, then add 1.8 g of natamycin and 0.1 g of 50% sodium hydroxide solution to the reactor, turn on the heating, wait for the temperature to rise to 65°C, stir at a constant temperature for 7 hours, filter, collect the product, wash, and dry to obtain an inorganic modified additive.

[0043] The modified titanium dioxide and inorganic modified additives were analyzed by infrared spectroscopy using Nicolet 170sx Fourier transform infrared spectrometer. Figure 2 As shown by Figure 2 It can be seen that in the infrared spectrum of modified titanium dioxide, 1725cm -1 The absorption peak of the ester group C=O appears at 1755cm -1 The absorption peak of C=O in the acyl chloride group appears at 1750cm -1 The absorption peak of the ester group C=O appears at 1720 cm -1 The absorption peak of the carboxyl group appears at 3310 cm -1 The absorption peak of NH in amide appears at 1655cm -1 The absorption peak of C=O in amide appears at

[0044] 3. Preparation of stainless steel plate

[0045] Step 1: Prepare water-based paint

[0046] Ⅰ: 30g of methyl methacrylate, 20g of butyl acrylate, 15g of hydroxyethyl methacrylate, 10g of acrylic acid, 4g of antifouling modification component, 2g of sodium dodecylbenzene sulfonate and 30g of deionized water were added to a stirring kettle, nitrogen was passed through, and after the air was exhausted, 1g of azobisisobutyronitrile was added to the stirring kettle. After the addition was completed, the system temperature was raised to 70°C, and the mixture was stirred and mixed at a stirring rate of 400r / min for 1h to obtain a prepolymer emulsion;

[0047] Ⅱ: Add 3g of inorganic modified additive, 5g of carbon black, 1g of propylene glycol, 1g of leveling agent RM-2020 and 2g of dimethyl silicone oil to the prepolymer emulsion, stir evenly mechanically, and let it stand for defoaming to obtain a water-based paint;

[0048] Step 2: Prepare stainless steel plate

[0049] Soak the 304 stainless steel plate in a sodium hydroxide solution for 20 minutes, take it out, rinse the surface of the stainless steel, then spray water-based paint evenly on the surface of the stainless steel plate, and dry it to obtain stainless steel.

[0050] Example 2

[0051] Preparation of stainless steel plates

[0052] Step 1: Prepare water-based paint

[0053] Ⅰ: 35g of methyl methacrylate, 25g of butyl acrylate, 20g of hydroxyethyl methacrylate, 15g of acrylic acid, 6g of antifouling modification component, 3g of sodium dodecylbenzene sulfonate and 35g of deionized water were added to a stirring kettle, nitrogen was passed through, and after the air was exhausted, 2g of azobisisobutyronitrile was added to the stirring kettle. After the addition was completed, the system temperature was raised to 75°C, and the mixture was stirred and mixed at a stirring rate of 500r / min for 2h to obtain a prepolymer emulsion;

[0054] Ⅱ: Add 5g of inorganic modified additive, 10g of carbon black, 1.5g of propylene glycol, 2g of leveling agent RM-2020 and 2.5g of dimethyl silicone oil to the prepolymer emulsion, stir evenly mechanically, let stand to defoam, and obtain a water-based paint;

[0055] Step 2: Prepare stainless steel plate

[0056] Soak the 304 stainless steel plate in a sodium hydroxide solution for 30 minutes, take it out, rinse the surface of the stainless steel, then spray water-based paint evenly on the surface of the stainless steel plate, and dry it to obtain stainless steel.

[0057] The preparation method of the antifouling modified component and the inorganic modified additive is the same as that in Example 1.

[0058] Example 3

[0059] Preparation of stainless steel plates

[0060] Step 1: Prepare water-based paint

[0061] Ⅰ: 40g of methyl methacrylate, 30g of butyl acrylate, 25g of hydroxyethyl methacrylate, 20g of acrylic acid, 8g of antifouling modification component, 4g of sodium dodecylbenzene sulfonate and 40g of deionized water were added to a stirring kettle, nitrogen was passed through, and after the air was exhausted, 3g of azobisisobutyronitrile was added to the stirring kettle. After the addition was completed, the system temperature was raised to 80°C, and the mixture was stirred and mixed at a stirring rate of 600r / min for 3h to obtain a prepolymer emulsion;

[0062] II: Add 6g of inorganic modified additive, 15g of carbon black, 2g of propylene glycol, 3g of leveling agent RM-2020 and 3g of dimethyl silicone oil to the prepolymer emulsion, stir evenly mechanically, and let stand to defoam to obtain a water-based paint;

[0063] Step 2: Prepare stainless steel plate

[0064] Soak the 304 stainless steel plate in a sodium hydroxide solution for 40 minutes, take it out, rinse the surface of the stainless steel, then spray water-based paint evenly on the surface of the stainless steel plate, and dry it to obtain stainless steel.

[0065] The preparation method of the antifouling modified component and the inorganic modified additive is the same as that in Example 1.

[0066] Comparative Example 1

[0067] Preparation of stainless steel plates

[0068] Step 1: Prepare water-based paint

[0069] Ⅰ: 35g of methyl methacrylate, 25g of butyl acrylate, 20g of hydroxyethyl methacrylate, 15g of acrylic acid, 6g of antifouling modification component, 3g of sodium dodecylbenzene sulfonate and 35g of deionized water were added to a stirring kettle, nitrogen was passed through, and after the air was exhausted, 2g of azobisisobutyronitrile was added to the stirring kettle. After the addition was completed, the system temperature was raised to 75°C, and the mixture was stirred and mixed at a stirring rate of 500r / min for 2h to obtain a prepolymer emulsion;

[0070] Ⅱ: Add 10g carbon black, 1.5g propylene glycol, 2g leveling agent RM-2020 and 2.5g dimethyl silicone oil to the prepolymer emulsion, stir evenly, let stand to defoam, and obtain water-based paint;

[0071] Step 2: Prepare stainless steel plate

[0072] Soak the 304 stainless steel plate in a sodium hydroxide solution for 30 minutes, take it out, rinse the surface of the stainless steel, then spray water-based paint evenly on the surface of the stainless steel plate, and dry it to obtain stainless steel.

[0073] The preparation method of the antifouling modified component is the same as that in Example 1.

[0074] Comparative Example 2

[0075] Preparation of stainless steel plates

[0076] Step 1: Prepare water-based paint

[0077] Ⅰ: 35g of methyl methacrylate, 25g of butyl acrylate, 20g of hydroxyethyl methacrylate, 15g of acrylic acid, 3g of sodium dodecylbenzene sulfonate and 35g of deionized water were added to a stirring kettle, nitrogen was passed through, and after the air was exhausted, 2g of azobisisobutyronitrile was added to the stirring kettle. After the addition was completed, the system temperature was raised to 75°C, and the mixture was stirred and mixed at a stirring rate of 500r / min for 2h to obtain a prepolymer emulsion;

[0078] Ⅱ: Add 5g of inorganic modified additive, 10g of carbon black, 1.5g of propylene glycol, 2g of leveling agent RM-2020 and 2.5g of dimethyl silicone oil to the prepolymer emulsion, stir evenly mechanically, let stand to defoam, and obtain a water-based paint;

[0079] Step 2: Prepare stainless steel plate

[0080] Soak the 304 stainless steel plate in a sodium hydroxide solution for 30 minutes, take it out, rinse the surface of the stainless steel, then spray water-based paint evenly on the surface of the stainless steel plate, and dry it to obtain stainless steel.

[0081] The preparation method of the inorganic modified additive is the same as that in Example 1.

[0082] Comparative Example 3

[0083] Preparation of stainless steel plates

[0084] Step 1: Prepare water-based paint

[0085] Ⅰ: 35g of methyl methacrylate, 25g of butyl acrylate, 20g of hydroxyethyl methacrylate, 15g of acrylic acid, 6g of antifouling modification component, 3g of sodium dodecylbenzene sulfonate and 35g of deionized water were added to a stirring kettle, nitrogen was passed through, and after the air was exhausted, 2g of azobisisobutyronitrile was added to the stirring kettle. After the addition was completed, the system temperature was raised to 75°C, and the mixture was stirred and mixed at a stirring rate of 500r / min for 2h to obtain a prepolymer emulsion;

[0086] Ⅱ: Add 4g titanium dioxide, 1g natamycin, 10g carbon black, 1.5g propylene glycol, 2g leveling agent RM-2020 and 2.5g dimethyl silicone oil to the prepolymer emulsion, stir evenly, let stand to defoam, and obtain a water-based paint;

[0087] Step 2: Prepare stainless steel plate

[0088] Soak the 304 stainless steel plate in a sodium hydroxide solution for 30 minutes, take it out, rinse the surface of the stainless steel, then spray water-based paint evenly on the surface of the stainless steel plate, and dry it to obtain stainless steel.

[0089] The preparation method of the antifouling modified component is the same as that in Example 1.

[0090] Comparative Example 4

[0091] Preparation of stainless steel plates

[0092] Step 1: Prepare water-based paint

[0093] Ⅰ: 35g of methyl methacrylate, 25g of butyl acrylate, 20g of hydroxyethyl methacrylate, 15g of acrylic acid, 3g of sodium dodecylbenzene sulfonate and 35g of deionized water were added to a stirring kettle, nitrogen was passed through, and after the air was exhausted, 2g of azobisisobutyronitrile was added to the stirring kettle. After the addition was completed, the system temperature was raised to 75°C, and the mixture was stirred and mixed at a stirring rate of 500r / min for 2h to obtain a prepolymer emulsion;

[0094] Ⅱ: Add 10g carbon black, 1.5g propylene glycol, 2g leveling agent RM-2020 and 2.5g dimethyl silicone oil to the prepolymer emulsion, stir evenly, let stand to defoam, and obtain water-based paint;

[0095] Step 2: Prepare stainless steel plate

[0096] Soak the 304 stainless steel plate in a sodium hydroxide solution for 30 minutes, take it out, rinse the surface of the stainless steel, then spray water-based paint evenly on the surface of the stainless steel plate, and dry it to obtain stainless steel.

[0097] Performance testing:

[0098] The stainless steel prepared in Examples 1 to 3 of the present invention and Comparative Examples 1 to 4 were made into test samples that met the specifications, and a Beijing JYSP-180 contact angle tester was used to test the water contact angle of the samples to evaluate the antifouling performance of the stainless steel plate surface; the antibacterial rate of the samples was calculated according to GB / T 21866-2008 "Determination of antibacterial properties and antibacterial effects of antibacterial coatings (paint films)", and the antibacterial performance of the stainless steel plate surface was evaluated, wherein Staphylococcus aureus was selected as the experimental strain; the antifungal performance of the samples was tested according to GB / T 1741-2020 "Determination of mildew resistance of paint films", and the mildew resistance of the stainless steel plate surface was evaluated, wherein Aspergillus niger was selected as the mildew, and the specific test results are shown in Table 1:

[0099] Table 1 - Performance Test

[0100] Water contact angle (°) Antibacterial rate (%) Mildew resistance level (grade) Example 1 154 99.3 0 Example 2 156 99.5 0 Example 3 153 99.1 0 Comparative Example 1 150 64.8 3 Comparative Example 2 112 99.0 0 Comparative Example 3 151 88.5 2 Comparative Example 4 106 60.3 4

[0101] It can be seen from the test results in Table 1 that the stainless steel plates prepared in Examples 1 to 3 have antifouling modified components and inorganic modified additives added to the water-based paint on their surfaces, and the water contact angle is greater than 150°, showing super hydrophobicity, an antibacterial rate greater than 99%, and a mildew resistance grade of 0, all of which have excellent antifouling and antibacterial and mildew resistance; the stainless steel plate prepared in Comparative Example 1 does not contain inorganic modified additives in the water-based paint on its surface, and the antibacterial and mildew resistance of the stainless steel plate is poor compared with the examples; the stainless steel plate prepared in Comparative Example 2 does not contain antifouling modified components in the water-based paint on its surface, and the water contact angle of the sample decreases significantly, and the antifouling performance of the stainless steel plate is Not as good as the embodiment; the stainless steel plate prepared in Comparative Example 3 has antifouling modified components, titanium dioxide and natamycin added to the water-based paint on its surface. Compared with the embodiment, the stainless steel plate has better antifouling performance, but poor antibacterial and mildew proof performance. This is because the titanium dioxide has not been organically modified, and agglomeration has occurred in the matrix, and the small molecules of natamycin have precipitated and migrated, resulting in reduced antibacterial and mildew proof effects of the stainless steel plate; the stainless steel plate prepared in Comparative Example 4 has no antifouling modified components and inorganic modified additives added to the water-based paint on its surface, so the antifouling performance and antibacterial and mildew proof performance of the stainless steel plate are the worst.

[0102] The above contents are merely examples and explanations of the concept of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A stainless steel plate based on water-based paint, It is characterized in that The stainless steel plate is made by spraying water-based paint on the surface of the stainless steel plate; the water-based paint comprises the following raw materials in parts by weight: 30 to 40 parts of methyl methacrylate, 20 to 30 parts of butyl acrylate, 15 to 25 parts of hydroxyethyl methacrylate, 10 to 20 parts of acrylic acid, 4 to 8 parts of antifouling modification components, 2 to 4 parts of emulsifiers, 30 to 40 parts of deionized water, 1 to 3 parts of initiators, 3 to 6 parts of inorganic modification additives, 5 to 15 parts of pigments and fillers, 1 to 2 parts of film-forming aids, 1 to 3 parts of leveling agents, and 2 to 3 parts of defoaming agents.

2. A stainless steel plate based on water-based paint according to claim 1, It is characterized in that The preparation method of the antifouling modified component comprises the following steps: Add hydroxy fluorosilicone oil and dimethyl sulfoxide solution into the reactor, stir mechanically and evenly, pass nitrogen, expel the air, add maleic anhydride, stir at room temperature for 3 to 6 hours, then add long alkyl alcohol and catalyst, raise the system temperature to 90 to 110°C under stirring conditions, keep warm for 4 to 8 hours, remove the solvent by reduced pressure distillation, discharge the material, and obtain the antifouling modified component.

3. A stainless steel plate based on water-based paint according to claim 2, It is characterized in that The hydroxyl content in the hydroxy fluorosilicone oil is 0.05-1.0 mol%.

4. A stainless steel plate based on water-based paint according to claim 2, It is characterized in that The long alkyl alcohol is any one of dodecanol, tetradecanol or octadecyl alcohol.

5. A stainless steel plate based on water-based paint according to claim 2, It is characterized in that The catalyst is any one of p-toluenesulfonic acid, aminosulfonic acid or trifluoromethanesulfonic acid.

6. A water-based paint-based stainless steel plate according to claim 1, It is characterized in that The preparation method of the inorganic modified additive comprises the following steps: Step AA1: titanium dioxide is mixed with a toluene solution, ultrasonically dispersed for 25 to 35 minutes, diacyl chloride monomer and sodium hydroxide solution are added, and after the addition is completed, the mixture is stirred at room temperature for 3 to 6 hours, and the material is separated and collected to obtain modified titanium dioxide; Step AA2: Add modified titanium dioxide and N,N-dimethylformamide to a nitrogen-protected reactor, stir evenly, then continue to add natamycin and sodium hydroxide solution to the reactor, turn on the heating, wait for the temperature to rise to 60-70°C, stir at a constant temperature for 4-9 hours, filter, collect the product, wash, and dry to obtain an inorganic modified additive.

7. A water-based paint-based stainless steel plate according to claim 6, It is characterized in that In step AA1, the diacyl chloride monomer is any one of succinyl chloride, glutaryl chloride or adipoyl chloride.

8. A stainless steel plate based on water-based paint according to claim 6, It is characterized in that In step AA2, the mass ratio of the modified titanium dioxide to natamycin is 1:0.1-0.

4.

9. A water-based paint-based stainless steel plate according to claim 1, It is characterized in that The stainless steel plate is prepared by the following method: Step 1: Prepare water-based paint Ⅰ: Add methyl methacrylate, butyl acrylate, hydroxyethyl methacrylate, acrylic acid, antifouling modification component, emulsifier and deionized water into a stirring kettle, pass nitrogen, exhaust air, then add initiator into the stirring kettle, after adding, raise the system temperature to 70-80°C, stir and mix at a stirring rate of 400-600 r / min for 1-3 hours to obtain a prepolymer emulsion; Ⅱ: Add inorganic modified additives, pigments and fillers, film-forming aids, leveling agents and defoamers to the prepolymer emulsion, stir evenly mechanically, and let stand to defoam to obtain a water-based paint; Step 2: Prepare stainless steel plate Soak the stainless steel plate in the degreasing liquid for 20 to 40 minutes, take it out, rinse the surface of the stainless steel, then spray the water-based paint evenly on the surface of the stainless steel plate, and dry it to obtain stainless steel.

10. An application of a stainless steel plate based on water-based paint as claimed in claim 1, It is characterized in that The stainless steel plate is applied in the field of kitchen cabinets.

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