A ship inner cabin coating with antibacterial effect and its preparation method and application

Abstract

The present application relates to the field of ship cabin decoration coatings, further relates to a coating with antibacterial effect and its preparation method and application. The coating of the present application is added with a visible light photocatalyst antibacterial agent. After the coating is applied on the surface of the ship cabin, the visible light photocatalyst antibacterial agent produces antibacterial and bacteriostatic effects through electron transition under visible light irradiation. Under non-irradiation conditions, the visible light photocatalyst antibacterial agent restores to its original state, thereby achieving long-acting and safe antibacterial effect. Furthermore, the technical problem of "unable to achieve long-acting antibacterial effect (short antibacterial effect maintenance time)" existing in the prior art antibacterial cabin coating is solved.

Description

Technical Field

[0001] This invention relates to the field of interior coatings for ships, and more specifically, to an antibacterial coating for ships, its preparation method, and its application. Background Technology

[0002] Interior tank paints are widely used in shipbuilding for decoration and protection of the steel plates and soft-covered surfaces of the interior tanks. Currently, the most commonly used interior tank paints in the shipbuilding industry are solvent-based alkyd paints, ordinary water-based acrylic interior tank paints, and ordinary water-based epoxy interior tank paints.

[0003] Ship interiors are often cramped, making painting difficult and ventilation inconvenient. As these areas are also where personnel congregate, they become breeding grounds for various germs and bacteria. Interior paint is applied to the interior walls, particularly during the application of soft insulation layers. The covering fabric and insulation materials are porous, absorbing a large amount of paint and easily trapping bacteria within the porous substrate. This results in a persistent paint odor and a buildup of bacteria, posing a significant health risk to those working and living inside. Therefore, researching and developing environmentally friendly, antibacterial water-based interior paints to eliminate residual viral hazards during interior painting, improve the living environment of interior compartments, and enhance the quality of life for crew members is of great importance.

[0004] Currently, most antibacterial interior coatings use Ag as the antibacterial carrier. However, these antibacterial interior coatings contain heavy metals, which pose a certain threat to the environment. Furthermore, they have the problem of short-lasting antibacterial effects, failing to achieve long-lasting antibacterial performance. Summary of the Invention

[0005] To address the technical problem of existing antibacterial interior coatings being unable to provide long-lasting antibacterial effects (short duration of antibacterial effect), this invention provides an environmentally friendly interior coating that, when applied to the surface of a ship's interior, achieves both long-lasting safe antibacterial properties and decorative effects, along with its preparation method and application.

[0006] One objective of this invention is to provide a coating with antibacterial properties. The antibacterial coating is prepared from raw materials comprising the following components; based on a total weight of 100 parts by weight of the raw materials, the components and their weight parts are as follows:

[0007] 13-18 parts by weight of water;

[0008] 40-50 parts by weight of water-based resin emulsion;

[0009] Visible light photocatalytic antibacterial agent, 0.1-3 parts by weight;

[0010] Additives: 2.7-9.7 parts by weight;

[0011] Pigments and fillers: 21-43 parts by weight;

[0012] The aqueous resin emulsion is selected from at least one of aqueous acrylic emulsion and aqueous acrylic epoxy hybrid emulsion.

[0013] To achieve better overall results (long-lasting antibacterial effect and mechanical properties), the preferred weight parts of each component are as follows, based on a total raw material weight of 100 parts:

[0014] 13-18 parts by weight of water;

[0015] 42-48 parts by weight of waterborne resin emulsion;

[0016] Visible light photocatalytic antibacterial agent, 0.5-2 parts by weight;

[0017] 3-8 parts by weight of additives;

[0018] Pigments and fillers: 30-35 parts by weight.

[0019] The visible light photocatalytic antibacterial agent can generate highly oxidizing substances (such as hydroxyl radicals and oxygen) under visible light irradiation, and can be used to decompose organic compounds, some inorganic compounds, bacteria, and viruses. Experiments have shown that, with other components and dosages of the coating being the same, the effective antibacterial period of the coating using red phosphorus / semiconductor photocatalytic antibacterial agent is significantly longer than that of coatings using the same amount of other visible light photocatalytic antibacterial agents. Therefore, the coating of this application preferably uses red phosphorus / semiconductor photocatalytic antibacterial agent, and its effective antibacterial period can reach more than 12 months.

[0020] Specifically, the weight ratio of red phosphorus to semiconductor in the red phosphorus / semiconductor photocatalytic antibacterial agent can be 1:1-2. The semiconductor in the red phosphorus / semiconductor photocatalytic antibacterial agent is preferably selected from one or a combination of titanium oxide, zinc oxide, iron oxide, tantalum oxide, tungsten oxide, bismuth vanadate, bismuth tungstate, bismuth molybdate, bismuth ferrite, zinc ferrite, and carbon nitride.

[0021] The red phosphorus / semiconductor photocatalytic antibacterial agent can be prepared by the following method: mixing red phosphorus and semiconductor uniformly by calcination or grinding to form the red phosphorus / semiconductor photocatalytic antibacterial agent. According to the embodiments disclosed in this invention, the preparation method of the red phosphorus / semiconductor photocatalytic antibacterial agent includes: grinding semiconductor and red phosphorus uniformly in a mortar, then placing it in a quartz tube, sealing the quartz tube after vacuuming, and calcining at 200°C for 48 hours to obtain the red phosphorus / semiconductor photocatalytic antibacterial agent.

[0022] The aforementioned antibacterial coatings, with other components and dosages being the same, exhibit significantly better adhesion when using a mixture of waterborne acrylic emulsion and waterborne acrylic-epoxy hybrid emulsion as the waterborne resin emulsion compared to coatings using only waterborne acrylic emulsion or waterborne acrylic-epoxy hybrid emulsion as the waterborne resin emulsion. Therefore, in the aforementioned antibacterial coatings, the waterborne resin emulsion is preferably composed of waterborne acrylic emulsion and waterborne acrylic-epoxy hybrid emulsion. Based on a total raw material weight of 100 parts, the composition is 20-25 parts by weight of waterborne acrylic emulsion and 20-25 parts by weight of waterborne acrylic-epoxy hybrid emulsion; preferably, 21-24 parts by weight of waterborne acrylic emulsion and 21-24 parts by weight of waterborne acrylic-epoxy hybrid emulsion.

[0023] For the aforementioned antibacterial coatings, when the waterborne resin emulsion is selected from waterborne acrylic emulsion or waterborne acrylic-epoxy hybrid emulsion, the added red phosphorus / semiconductor photocatalytic antibacterial agent does not improve the corrosion resistance of the coating. That is, the corrosion resistance of coatings using waterborne acrylic emulsion or waterborne acrylic-epoxy hybrid emulsion as the waterborne resin emulsion remains unchanged before and after the addition of the red phosphorus / semiconductor photocatalytic antibacterial agent. Specifically, coatings using waterborne acrylic emulsion as the waterborne resin emulsion exhibit flash rust both before and after the addition of the red phosphorus / semiconductor photocatalytic antibacterial agent, with a salt spray resistance test result of 72 hours. Coatings using waterborne acrylic-epoxy hybrid emulsion as the waterborne resin emulsion exhibit a short salt spray resistance time both before and after the addition of the red phosphorus / semiconductor photocatalytic antibacterial agent, with a salt spray resistance test result of 360 hours, failing to meet the minimum salt spray performance requirement of 400 hours for current marine applications.

[0024] The aforementioned antibacterial coatings, when the waterborne resin emulsion is a blend of waterborne acrylic emulsion and waterborne acrylic-epoxy hybrid emulsion, show a significant improvement in corrosion resistance upon the addition of the red phosphorus / semiconductor photocatalytic antibacterial agent. Specifically, coatings using a blend of waterborne acrylic emulsion and waterborne acrylic-epoxy hybrid emulsion as the waterborne resin emulsion exhibit significantly improved corrosion resistance before and after the addition of the red phosphorus / semiconductor photocatalytic antibacterial agent. Specifically, before the addition of the red phosphorus / semiconductor photocatalytic antibacterial agent, the salt spray resistance of coatings using a blend of waterborne acrylic emulsion and waterborne acrylic-epoxy hybrid emulsion as the waterborne resin emulsion was approximately 360 hours, with corrosion diffusion at the cross-shaped points exceeding 5 mm; after the addition of the red phosphorus / semiconductor photocatalytic antibacterial agent, the salt spray resistance was approximately 400 hours, with corrosion diffusion at the cross-shaped points less than 2 mm.

[0025] Specifically, an antibacterial coating is prepared from raw materials comprising the following components; based on a total weight of 100 parts by weight of raw materials, the components and their weight parts are as follows:

[0026] 13-18 parts by weight of water;

[0027] 20-25 parts by weight of water-based acrylic emulsion

[0028] 20-25 parts by weight of waterborne acrylic epoxy hybrid emulsion;

[0029] Red phosphorus / semiconductor photocatalytic antibacterial agent: 0.5-3 parts by weight;

[0030] Additives: 2.7-9.7 parts by weight;

[0031] Pigments and fillers: 21-43 parts by weight.

[0032] The additives used in the above-mentioned antibacterial coatings can be any one or more existing additives that can be used in ship interior coatings; for example, they can be selected from one or a combination of wetting and dispersing agents, multifunctional additives (commercially available, such as multifunctional additive AMP95), defoamers, deodorizing film-forming aids, antifreeze agents, anti-flash corrosion agents and thickeners.

[0033] The dosage of the above-mentioned additives is the conventional dosage in the art, and technicians can adjust it according to the actual situation. In this invention, preferably, based on 100 parts by weight of the total raw materials, the additives include 0.5-2 parts by weight of wetting and dispersing agent, 0-0.2 parts by weight of multifunctional additive, 0.5-1 parts by weight of defoamer, 1-3 parts by weight of deodorizing film-forming aid, 0.3-1 parts by weight of antifreeze, 0.1-0.5 parts by weight of anti-flashover agent, and 0.3-2 parts by weight of thickener.

[0034] The pigments and fillers used in the aforementioned antibacterial coatings can be any one or more existing pigments and fillers suitable for use in ship interior coatings; for example, they can be selected from one or more of titanium dioxide, barium sulfate, calcium carbonate, and color paste. The amount of pigments and fillers used is the conventional amount used in the art, and those skilled in the art can adjust it according to actual conditions. In this invention, preferably, based on 100 parts by weight of the total raw materials, the pigments and fillers include 5-15 parts by weight of titanium dioxide, 10-15 parts by weight of barium sulfate, 3-8 parts by weight of calcium carbonate, and 3-5 parts by weight of color paste.

[0035] The titanium dioxide used in the pigments and fillers affects the antibacterial effect of the coating. Ordinary titanium dioxide does not have antibacterial properties, while nitrogen-doped titanium dioxide can synergistically enhance the antibacterial effect (both antibacterial capacity and antibacterial duration are improved) with the action of photocatalytic antibacterial agents. Therefore, the present invention preferably uses nitrogen-doped titanium dioxide; more preferably, the molar ratio of titanium dioxide to nitrogen in nitrogen-doped titanium dioxide is 1:1-5.

[0036] The nitrogen-doped titanium dioxide can be commercially available or prepared using existing methods. According to an embodiment of the present invention, the preparation method of the nitrogen-doped titanium dioxide includes: grinding and mixing titanium dioxide and urea, calcining the mixture in air at 450-600°C for at least 3 hours, and then cooling it to room temperature to obtain the nitrogen-doped titanium dioxide.

[0037] The barium sulfate used in the pigments and fillers can be ultrafine barium sulfate of 400-1250 mesh.

[0038] According to the embodiments disclosed in this invention, a coating with antibacterial properties is prepared from raw materials comprising the following components; based on a total weight of 100 parts by weight of raw materials, the components and their weight parts are as follows:

[0039] 13-18 parts by weight of water;

[0040] 20-25 parts by weight of water-based acrylic emulsion

[0041] 20-25 parts by weight of waterborne acrylic epoxy hybrid emulsion;

[0042] Red phosphorus / semiconductor photocatalytic antibacterial agent: 0.5-3 parts by weight;

[0043] 0.5-2 parts by weight of wetting and dispersing agent;

[0044] Multifunctional additive, 0-0.2 parts by weight;

[0045] Defoamer 0.5-1 parts by weight;

[0046] 1-3 parts by weight of deodorizing film-forming aid;

[0047] Antifreeze 0.3-1 parts by weight;

[0048] Anti-flashover agent: 0.1-0.5 parts by weight;

[0049] Thickener 0.3-2 parts by weight;

[0050] 5-15 parts by weight of nitrogen-doped titanium dioxide;

[0051] 10-15 parts by weight of barium sulfate;

[0052] Calcium carbonate 3-8 parts by weight;

[0053] 3-5 parts by weight of color paste.

[0054] The above-mentioned antibacterial coatings use water-based acrylic emulsions with a solid content of 45-47 wt% and water-based acrylic-epoxy hybrid emulsions with a solid content of 45-52 wt%.

[0055] A second objective of this invention is to provide a method for preparing an antibacterial coating, as provided in one of the invention's objectives.

[0056] The preparation method of the antibacterial coating includes: uniformly mixing the water, waterborne resin emulsion, visible light photocatalytic antibacterial agent, additives, and pigments and fillers to obtain the antibacterial coating. According to the embodiments disclosed in this invention, the preparation method of the antibacterial coating includes: adding water, wetting and dispersing agent, multifunctional additives, a portion of the defoamer (preferably half), titanium dioxide, barium sulfate, zinc phosphate, and calcium carbonate at 300-400 r / min, and dispersing at 1000-1200 r / min for 30-45 min; adding the remaining defoamer, visible light photocatalytic antibacterial agent, waterborne acrylic emulsion, waterborne acrylic epoxy hybrid emulsion, deodorizing film-forming aid, antifreeze, anti-flashover agent, thickener, and color paste at 500-600 r / min, and stirring at 800-1000 r / min for 15-30 min to obtain the antibacterial coating.

[0057] A third objective of this invention is to provide an application of the antibacterial coating provided in one of the invention's objectives in the field of ship interiors; specifically, it can be applied to the living quarters, bridge, and cargo compartments of ships.

[0058] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0059] 1. The coating of the present invention contains a visible light photocatalytic antibacterial agent. After the coating is applied to the surface of the living quarters of a ship, the visible light photocatalytic antibacterial agent produces antibacterial, bacteriostatic, and bactericidal effects through electron transition under visible light irradiation. Under non-light irradiation conditions, the visible light photocatalytic antibacterial agent returns to its original state, thereby achieving long-lasting and safe antibacterial properties.

[0060] 2. The coating of the present invention further adopts red phosphorus / semiconductor photocatalytic antibacterial agent, which further extends its effective antibacterial period.

[0061] 3. The coating of the present invention further uses water-based acrylic emulsion and water-based acrylic epoxy hybrid emulsion as film-forming substances, which can improve the adhesion performance of the coating and achieve good adhesion on different substrates.

[0062] 4. The coating of the present invention, by further using water-based acrylic emulsion and water-based acrylic epoxy hybrid emulsion as film-forming substances and employing red phosphorus / semiconductor photocatalytic antibacterial agent, can significantly improve the corrosion resistance of the coating.

[0063] 5. The coating of the present invention is environmentally friendly and has long-lasting safe antibacterial and decorative properties. Detailed Implementation

[0064] The present invention will now be described in detail with reference to specific embodiments. It should be noted that the following embodiments are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the content of the present invention are still within the scope of protection of the present invention.

[0065] Unless otherwise specified, all raw materials used in the examples are commercially available products. The brands and suppliers of the raw materials used in the examples are as follows:

[0066] The wetting and dispersing agent is Coatex BR3;

[0067] The multifunctional additive is designated as AMP95.

[0068] The defoamer brand is DF677;

[0069] The deodorizing film-forming aid is brand RTC-290A;

[0070] The anti-flashover agent is designated as FA179.

[0071] The alkali-swellable thickener is designated as ASE60.

[0072] Polyurethane associative thickener 361, Longhai Chemical;

[0073] Iron-red paste, brand name Shiming Technology TSE5907;

[0074] Water-based acrylic emulsion 8171, Yantai Wanhua;

[0075] Aqueous acrylic-epoxy hybrid emulsion, Dow Chemical.

[0076] Example 1

[0077] Titanium dioxide and urea were ground and mixed at a molar ratio of 1:2. The mixture was then calcined in air at 450°C for 3 hours and then slowly cooled to room temperature to obtain nitrogen-doped titanium dioxide.

[0078] Red phosphorus and semiconductor titanium dioxide were mixed in a weight ratio of 1:1.5. The semiconductor and red phosphorus were ground evenly in a mortar. The mixture was then placed in a quartz tube, vacuumed, and sealed. The quartz tube was then calcined at 200°C for 48 hours to obtain the red phosphorus / semiconductor photocatalytic antibacterial agent.

[0079] Add the following sequentially at a speed of 300 r / min:

[0080] 14 parts by weight of water,

[0081] 0.3 parts by weight of wetting and dispersing agent

[0082] 0.2 parts by weight of multifunctional additive,

[0083] 0.1 parts by weight of defoamer

[0084] 10 parts by weight of the nitrogen-doped titanium dioxide prepared above,

[0085] 10 parts by weight of 400-mesh ultrafine barium sulfate

[0086] 5 parts by weight of zinc phosphate,

[0087] 0 parts by weight of calcium carbonate;

[0088] After high-speed dispersion at 1000 r / min for 30 min, mix thoroughly; add at 500 r / min:

[0089] 0.1 parts by weight of defoamer

[0090] 3 parts by weight of the red phosphorus / semiconductor photocatalytic antibacterial agent prepared above,

[0091] 25 parts by weight of water-based acrylic emulsion,

[0092] 25 parts by weight of waterborne acrylic-epoxy hybrid emulsion,

[0093] 2.5 parts by weight of odor-neutralizing film-forming aid.

[0094] 1 part by weight of antifreeze propylene glycol,

[0095] 3 parts by weight of anti-flashover agent,

[0096] 0.25 parts by weight of alkali-swellable thickener

[0097] 0.15 parts by weight of polyurethane associative thickener 361,

[0098] 0.4 parts by weight of iron-red paste;

[0099] After stirring at 800 r / min for 30 minutes, the finished antibacterial coating for ship interiors is obtained.

[0100] Example 2

[0101] Add the following sequentially at a speed of 300 r / min:

[0102] 13 parts by weight of water,

[0103] 0.2 parts by weight of wetting and dispersing agent

[0104] 0.15 parts by weight of multifunctional additive,

[0105] 0.1 parts by weight of defoamer

[0106] 12 parts by weight of nitrogen-doped titanium dioxide prepared in Example 1,

[0107] 10 parts by weight of 400-mesh ultrafine barium sulfate

[0108] 8 parts by weight of zinc phosphate,

[0109] 2.5 parts by weight of calcium carbonate;

[0110] After high-speed dispersion at 1000 r / min for 30 min, mix thoroughly; add at 500 r / min:

[0111] 0.1 parts by weight of defoamer

[0112] 1 part by weight of the red phosphorus / semiconductor photocatalytic antibacterial agent prepared in Example 1,

[0113] 20 parts by weight of water-based acrylic emulsion,

[0114] 25 parts by weight of waterborne acrylic-epoxy hybrid emulsion,

[0115] 2.25 parts by weight of odor-neutralizing film-forming aid.

[0116] 2 parts by weight of antifreeze propylene glycol,

[0117] 2 parts by weight of anti-flashover agent,

[0118] 0.2 parts by weight of alkali-swellable thickener

[0119] 0.1 parts by weight of polyurethane associative thickener 361,

[0120] 1.4 parts by weight of iron-red paste;

[0121] After stirring at 800 r / min for 30 minutes, the finished antibacterial coating for ship interiors is obtained.

[0122] Example 3

[0123] Add the following sequentially at a speed of 300 r / min:

[0124] 16 parts by weight of water,

[0125] 0.24 parts by weight of wetting and dispersing agent

[0126] 0.15 parts by weight of multifunctional additive,

[0127] 0.1 parts by weight of defoamer

[0128] 13 parts by weight of nitrogen-doped titanium dioxide prepared in Example 1,

[0129] 10 parts by weight of 400-mesh ultrafine barium sulfate

[0130] 4 parts by weight of zinc phosphate,

[0131] 2.5 parts by weight of calcium carbonate;

[0132] After high-speed dispersion at 1000 r / min for 30 min, mix thoroughly; add at 500 r / min:

[0133] 0.1 parts by weight of defoamer

[0134] 2 parts by weight of the red phosphorus / semiconductor photocatalytic antibacterial agent prepared in Example 1,

[0135] 25 parts by weight of water-based acrylic emulsion,

[0136] 20 parts by weight of waterborne acrylic-epoxy hybrid emulsion,

[0137] 2.25 parts by weight of odor-neutralizing film-forming aid.

[0138] 2 parts by weight of antifreeze propylene glycol,

[0139] 2 parts by weight of anti-flashover agent,

[0140] 0.2 parts by weight of alkali-swellable thickener

[0141] 0.15 parts by weight of polyurethane associative thickener 361,

[0142] 0.31 parts by weight of iron-red paste;

[0143] After stirring at 800 r / min for 30 minutes, the finished antibacterial coating for ship interiors is obtained.

[0144] Example 4

[0145] Add the following sequentially at a speed of 300 r / min:

[0146] 17.5 parts by weight of water,

[0147] 0.2 parts by weight of wetting and dispersing agent

[0148] 0.1 parts by weight of multifunctional additive,

[0149] 0.1 parts by weight of defoamer

[0150] 10 parts by weight of nitrogen-doped titanium dioxide prepared in Example 1,

[0151] 10 parts by weight of 400-mesh ultrafine barium sulfate

[0152] 10 parts by weight of zinc phosphate,

[0153] 5 parts by weight of calcium carbonate;

[0154] After high-speed dispersion at 1000 r / min for 30 min, mix thoroughly; add at 500 r / min:

[0155] 0.1 parts by weight of defoamer

[0156] 0.5 parts by weight of the red phosphorus / semiconductor photocatalytic antibacterial agent prepared in Example 1,

[0157] 20 parts by weight of water-based acrylic emulsion,

[0158] 20 parts by weight of waterborne acrylic-epoxy hybrid emulsion,

[0159] 2 parts by weight of deodorizing film-forming aid,

[0160] 3 parts by weight of antifreeze propylene glycol,

[0161] 1 part by weight of anti-flashover agent,

[0162] 0.2 parts by weight of alkali-swellable thickener

[0163] 0.1 parts by weight of polyurethane associative thickener 361,

[0164] 0.2 parts by weight of iron-red paste;

[0165] After stirring at 800 r / min for 30 minutes, the finished antibacterial coating for ship interiors is obtained.

[0166] Example 5

[0167] Add the following sequentially at a speed of 300 r / min:

[0168] 17.5 parts by weight of water,

[0169] 0.2 parts by weight of wetting and dispersing agent

[0170] 0.1 parts by weight of multifunctional additive,

[0171] 0.1 parts by weight of defoamer

[0172] 10 parts by weight of nitrogen-doped titanium dioxide prepared in Example 1,

[0173] 10 parts by weight of 400-mesh ultrafine barium sulfate

[0174] 10 parts by weight of zinc phosphate,

[0175] 5 parts by weight of calcium carbonate;

[0176] After high-speed dispersion at 1000 r / min for 30 min, mix thoroughly; add at 500 r / min;

[0177] 0.1 parts by weight of defoamer

[0178] 0.5 parts by weight of the red phosphorus / semiconductor photocatalytic antibacterial agent prepared in Example 1,

[0179] 40 parts by weight of water-based acrylic emulsion,

[0180] 2 parts by weight of deodorizing film-forming aid,

[0181] 3 parts by weight of antifreeze propylene glycol,

[0182] 1 part by weight of anti-flashover agent,

[0183] 0.2 parts by weight of alkali-swellable thickener

[0184] 0.1 parts by weight of polyurethane associative thickener 361,

[0185] 0.2 parts by weight of iron-red paste;

[0186] After stirring at 800 r / min for 30 minutes, the finished antibacterial coating for ship interiors is obtained.

[0187] Example 6

[0188] Add the following sequentially at a speed of 300 r / min:

[0189] 17.5 parts by weight of water,

[0190] 0.2 parts by weight of wetting and dispersing agent

[0191] 0.1 parts by weight of multifunctional additive,

[0192] 0.1 parts by weight of defoamer

[0193] 10 parts by weight of nitrogen-doped titanium dioxide prepared in Example 1,

[0194] 10 parts by weight of 400-mesh ultrafine barium sulfate

[0195] 10 parts by weight of zinc phosphate,

[0196] 5 parts by weight of calcium carbonate,

[0197] After high-speed dispersion at 1000 r / min for 30 min, mix thoroughly; add at 500 r / min:

[0198] 0.1 parts by weight of defoamer

[0199] 0.5 parts by weight of the red phosphorus / semiconductor photocatalytic antibacterial agent prepared in Example 1,

[0200] 40 parts by weight of waterborne acrylic-epoxy hybrid emulsion,

[0201] 2 parts by weight of deodorizing film-forming aid,

[0202] 3 parts by weight of antifreeze propylene glycol,

[0203] 1 part by weight of anti-flashover agent,

[0204] 0.2 parts by weight of alkali-swellable thickener

[0205] 0.1 parts by weight of polyurethane associative thickener 361,

[0206] 0.2 parts by weight of iron-red paste;

[0207] After stirring at 800 r / min for 30 minutes, the finished antibacterial coating for ship interiors is obtained.

[0208] Comparative Example 1

[0209] Add the following sequentially at a speed of 300 r / min:

[0210] 17.5 parts by weight of water,

[0211] 0.2 parts by weight of wetting and dispersing agent

[0212] 0.1 parts by weight of multifunctional additive,

[0213] 0.1 parts by weight of defoamer

[0214] 10 parts by weight of nitrogen-doped titanium dioxide prepared in Example 1,

[0215] 10 parts by weight of 400-mesh ultrafine barium sulfate

[0216] 10 parts by weight of zinc phosphate,

[0217] 5 parts by weight of calcium carbonate,

[0218] After high-speed dispersion at 1000 r / min for 30 min, mix thoroughly; add at 500 r / min:

[0219] 0.1 parts by weight of defoamer

[0220] 0.5 parts by weight of nano-silver antibacterial agent powder,

[0221] 20 parts by weight of water-based acrylic emulsion,

[0222] 20 parts by weight of waterborne acrylic-epoxy hybrid emulsion,

[0223] 2 parts by weight of deodorizing film-forming aid,

[0224] 3 parts by weight of antifreeze propylene glycol,

[0225] 1 part by weight of anti-flashover agent,

[0226] 0.2 parts by weight of alkali-swellable thickener

[0227] 0.1 parts by weight of polyurethane associative thickener 361,

[0228] 0.2 parts by weight of iron-red paste;

[0229] After stirring at 800 r / min for 30 minutes, the finished antibacterial coating for ship interiors is obtained.

[0230] The performance of the finished antibacterial coatings for ship interiors prepared in Examples 1-7 was tested. The test methods and results are shown in Tables 1 and 2. The mold resistance of the finished antibacterial coatings for ship interiors prepared in Examples 1-7 was tested; the test method was in accordance with GJB150.10A-2009, and the test results are shown in Table 3.

[0231] Table 1

[0232]

[0233] Table 2

[0234]

[0235] Table 3

[0236] Mold resistance, grade Inhibiting mold growth time Example 1 0 24 months Example 2 0 24 months Example 3 0 24 months Example 4 0 12 months Example 5 0 12 months Example 6 0 12 months Comparative Example 1 2 It will expire in 3 months.

[0237] In Table 3, the period of inhibition of mold growth refers to the period during which the inhibition rate of mold growth is 99%. For example, an inhibition period of 12 months means that the inhibition rate of mold growth is still 99% after 12 months.

[0238] In Tables 2 and 3, mold refers to Aspergillus AS3.3950 and Aspergillus niger AS3.3928.

[0239] The only difference between Examples 4, 5, and 6 is the film-forming substance. The film-forming substance in Example 4 was a mixture of 20 parts by weight of an aqueous acrylic emulsion and 20 parts by weight of an aqueous acrylic-epoxy hybrid emulsion. The film-forming substance in Example 5 was 40 parts by weight of an aqueous acrylic emulsion, and the film-forming substance in Example 6 was 40 parts by weight of an aqueous acrylic-epoxy hybrid emulsion. Table 1 shows that the adhesion of Example 4 was greater than that of Example 5, and also greater than that of Example 6. Therefore, it can be concluded that the mixture of aqueous acrylic emulsion and aqueous acrylic-epoxy hybrid emulsion, used as a film-forming substance, produced the unexpected technical effect of improving coating adhesion.

[0240] The only difference between Example 4 and Comparative Example 1 is the added antibacterial agent. Example 4 used a red phosphorus / semiconductor photocatalytic antibacterial agent, while Comparative Example 1 used a nano-silver antibacterial agent. Table 2 shows that Example 4's 400h salt spray resistance test results were "no bubbling, no rusting, and corrosion diffusion less than 2mm," while Comparative Example 1's 400h salt spray resistance test results were "no bubbling, no rusting, and corrosion diffusion greater than 5mm." Example 4's salt spray resistance was significantly better than Comparative Example 1. This demonstrates that, given the film-forming material is a blend of aqueous acrylic emulsion and aqueous acrylic epoxy hybrid emulsion, the red phosphorus / semiconductor photocatalytic antibacterial agent not only provides long-lasting antibacterial effects but also exhibits a synergistic effect with the film-forming material, resulting in improved corrosion resistance.

[0241] The addition amount of red phosphorus / semiconductor photocatalytic antibacterial agent in Examples 1-3 all exceeded 1%, while the addition amount in Examples 4-6 was 0.5%. Table 3 shows that Examples 1-3 effectively inhibited mold growth for 24 months, while Examples 4-6 effectively inhibited mold growth for 12 months. This indicates that the antibacterial effect is prolonged with increasing addition amount of red phosphorus / semiconductor photocatalytic antibacterial agent. Comparative Example 1 effectively inhibited mold growth for only 3 months, while Example 4 effectively inhibited mold growth for 12 months; this demonstrates that the effective antibacterial period of the coating using red phosphorus / semiconductor photocatalytic antibacterial agent is significantly longer than that of the coating using nano-silver antibacterial agent.

[0242] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A coating with antibacterial properties, characterized in that, The antibacterial coating is prepared from raw materials comprising the following components; Based on a total raw material weight of 100 parts by weight, the components and their parts by weight are as follows: 13-18 parts by weight of water; 40-50 parts by weight of water-based resin emulsion; Visible light photocatalytic antibacterial agent, 0.1-3 parts by weight; Additives: 2.7-9.7 parts by weight; Pigments and fillers: 21-43 parts by weight; The visible light photocatalytic antibacterial agent is selected from red phosphorus / semiconductor photocatalytic antibacterial agents, wherein the weight ratio of red phosphorus to semiconductor in the red phosphorus / semiconductor photocatalytic antibacterial agent is 1:1-2; The preparation method of the red phosphorus / semiconductor photocatalytic antibacterial agent includes: grinding the semiconductor and red phosphorus evenly in a mortar, then placing them in a quartz tube, sealing the quartz tube after vacuuming, and calcining at 200°C for 48 hours; The aqueous resin emulsion is composed of an aqueous acrylic emulsion and an aqueous acrylic-epoxy hybrid emulsion; based on a total raw material weight of 100 parts by weight, the aqueous acrylic emulsion comprises 20-25 parts by weight and the aqueous acrylic-epoxy hybrid emulsion comprises 20-25 parts by weight.

2. The antibacterial coating as described in claim 1, characterized in that, Based on a total raw material weight of 100 parts by weight, the components and their parts by weight are as follows: 15-16 parts by weight of water; 42-45 parts by weight of water-based resin emulsion; Visible light photocatalytic antibacterial agent, 0.5-2 parts by weight; 3-8 parts by weight of additives; Pigments and fillers: 30-35 parts by weight.

3. The antibacterial coating as described in claim 1, characterized in that, The semiconductor in the red phosphorus / semiconductor photocatalytic antibacterial agent is selected from one or a combination of titanium oxide, zinc oxide, iron oxide, tantalum oxide, tungsten oxide, bismuth vanadate, bismuth tungstate, bismuth molybdate, bismuth ferrite, zinc ferrite, and carbon nitride.

4. The antibacterial coating as described in claim 1, characterized in that, Based on a total raw material weight of 100 parts by weight, there are 21-24 parts by weight of waterborne acrylic emulsion and 21-24 parts by weight of waterborne acrylic epoxy hybrid emulsion.

5. The antibacterial coating as described in claim 1, characterized in that, The adjuvants include: One or a combination of wetting and dispersing agents, multifunctional additives, defoamers, deodorizing film-forming aids, antifreeze agents, anti-flash corrosion agents, and thickeners.

6. The antibacterial coating as described in claim 1, characterized in that... The pigments and fillers include: One or a combination of titanium dioxide, barium sulfate, calcium carbonate, and color paste.

7. The antibacterial coating as described in claim 6, characterized in that, The titanium dioxide is selected from nitrogen-doped titanium dioxide.

8. The antibacterial coating as described in claim 7, characterized in that, In nitrogen-doped titanium dioxide, the molar ratio of titanium dioxide to nitrogen is 1:1-5.

9. A method for preparing a coating with antibacterial properties as described in any one of claims 1-8, characterized in that, The preparation method includes: mixing the water, water-based resin emulsion, visible light photocatalytic antibacterial agent, additives and pigments and fillers evenly to obtain the coating with antibacterial effect.

10. The application of an antibacterial coating as described in any one of claims 1-8 in the field of ship interiors.

Images