Antibacterial anticorrosive paint and preparation method thereof

Abstract

The invention discloses antibacterial and anticorrosive paint and a preparation method thereof. The antibacterial and anticorrosive paint is prepared from a first composition and a second composition, the first composition is prepared from the following raw materials in parts by weight: 100 to 120 parts of acrylic emulsion, 35 to 45 parts of liquid bisphenol A epoxy resin, 4 to 8 parts of carbon nano tube, 1 to 2 parts of nano silver, 200 to 250 parts of jade powder of Xiuyen jade, 6 to 10 parts of nano titanium dioxide, 4 to 8 parts of emulsifier, 4 to 6 parts of coalescing agent, 1 to 3 parts of dispersing agent, 3 to 5 parts of aluminum triphosphate, 0.8 to 1.2 parts of defoaming agent, 0.8 to 1.2 parts of antioxidant and 400 to 500 parts of water; the second composition is prepared from the following raw materials in parts by weight: 10 to 15 parts of isocyanate, 20 to 30 parts of styrene, 0.4 to 0.8 part of an emulsifier and 40 to 60 parts of water; according to the antibacterial corrosion-resistant coating disclosed by the invention, by limiting the variety and dosage of each raw material, the prepared coating has excellent antibacterial and corrosion-resistant properties and can better meet market requirements.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, and in particular to an antibacterial and anticorrosive coating and a preparation method thereof. Background Art

[0002] Paint is applied to the surface of the object to be protected or decorated, and can form a continuous film that is firmly attached to the coated object. It is a liquid mainly based on resin, oil, or emulsion, with or without added pigments and fillers, and with corresponding additives, and prepared with organic solvents or water.

[0003] With the rapid development of my country's real estate industry, the demand for interior wall coatings is increasing, and people's requirements for the appearance of buildings are also constantly improving. Interior wall coatings are used to paint the interior walls of buildings. They can protect the interior walls from damage caused by various external environments and beautify the interior walls. Therefore, interior wall coatings generally need to be able to meet the requirements of antibacterial, anti-corrosion, moisture resistance, color retention, and strong adhesion. In the prior art, the functionality of coatings is relatively single and cannot meet the requirements of diversity and complexity.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide an antibacterial and anticorrosive coating and a preparation method thereof. The antibacterial and anticorrosive coating of the present invention has excellent antibacterial and anticorrosive properties and can better meet market demand.

[0006] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are particularly adopted:

[0007] The first aspect of the present invention provides an antibacterial and anticorrosive coating, wherein the antibacterial and anticorrosive coating is composed of a first composition and a second composition;

[0008] The first composition comprises the following raw materials in parts by weight:

[0009] 100-120 parts of acrylic emulsion, 35-45 parts of liquid bisphenol A epoxy resin, 4-8 parts of carbon nanotubes, 1-2 parts of nano silver, 200-250 parts of Xiuyu jade powder, 6-10 parts of nano titanium dioxide, 4-8 parts of emulsifier, 4-6 parts of film-forming aid, 1-3 parts of dispersant, 3-5 parts of aluminum tripolyphosphate, 0.8-1.2 parts of defoamer, 0.8-1.2 parts of antioxidant and 400-500 parts of water;

[0010] The second composition comprises the following raw materials in parts by weight:

[0011] 10-15 parts of isocyanate, 20-30 parts of styrene, 0.4-0.8 parts of emulsifier and 40-60 parts of water.

[0012] Preferably, the first composition comprises the following raw materials in parts by weight:

[0013] 120 parts of acrylic emulsion, 40 parts of liquid bisphenol A epoxy resin, 6 parts of carbon nanotubes, 1.5 parts of nano silver, 220 parts of Xiuyan jade powder, 8 parts of nano titanium dioxide, 6 parts of emulsifier, 5 parts of film-forming aid, 2 parts of dispersant, 4 parts of aluminum tripolyphosphate, 1 part of defoamer, 1 part of antioxidant and 450 parts of water.

[0014] Preferably, the second composition comprises the following raw materials in parts by weight:

[0015] 12 parts of isocyanate, 25 parts of styrene, 0.6 parts of emulsifier and 50 parts of water.

[0016] Preferably, the mass ratio of the first composition to the second composition is 1:(0.4-0.6).

[0017] Preferably, the emulsifier is sodium dodecyl sulfate and / or sodium dodecylbenzene sulfonate.

[0018] Preferably, the film-forming aid is acetone or xylene.

[0019] Preferably, the dispersant is a cellulose derivative, polyethylene glycol fatty acid ester or methyl amyl alcohol.

[0020] Preferably, the defoaming agent is a silicone defoaming agent.

[0021] Preferably, the antioxidant is antioxidant 1010 or antioxidant 1076.

[0022] The second aspect of the present invention provides a method for preparing the antibacterial and anticorrosive coating, the method comprising the following steps:

[0023] (a) placing carbon nanotubes and nanosilver in water, stirring and drying to obtain a composite;

[0024] (b) mixing and emulsifying an acrylic emulsion, a liquid bisphenol A epoxy resin, water and an emulsifier to obtain a mixed emulsion; adding a dispersant, a defoamer and an antioxidant to the mixed emulsion and mixing them evenly; then, adding the composite, Xiuyan jade powder, nano titanium dioxide and aluminum tripolyphosphate and stirring them evenly to obtain a first composition;

[0025] (c) mixing and emulsifying isocyanate, styrene, an emulsifier and water to obtain a second composition;

[0026] (d) mixing the first composition and the second composition to obtain the antibacterial and anticorrosive coating.

[0027] Compared with the prior art, the beneficial effects of the present invention include at least:

[0028] The invention limits the types and amounts of various raw materials so that the prepared coating has excellent antibacterial and anticorrosion properties. Specifically, through the joint cross-linking of acrylic emulsion, liquid bisphenol A epoxy resin, isocyanate and styrene, the prepared coating has excellent corrosion resistance and waterproof properties. Carbon nanotubes, nano silver, Xiuyan jade powder, nano titanium dioxide, antioxidants and aluminum tripolyphosphate are used to improve the antibacterial, antioxidant and anticorrosion properties of the prepared coating. By limiting the amounts of various raw materials, the raw materials can fully play their role, so that the prepared coating has better corrosion resistance, waterproof, antibacterial and other properties. DETAILED DESCRIPTION

[0029] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0030] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0031] Example 1

[0032] This embodiment is an antibacterial and anticorrosive coating, which is composed of a first composition and a second composition; the mass ratio of the first composition to the second composition is 1:0.4;

[0033] The first composition comprises the following raw materials in parts by weight:

[0034] 100 parts of acrylic emulsion, 35 parts of liquid bisphenol A epoxy resin, 8 parts of carbon nanotubes, 1 part of nano silver, 250 parts of Xiuyu jade powder, 6 parts of nano titanium dioxide, 8 parts of emulsifier, 4 parts of film-forming aid, 1 part of dispersant, 3 parts of aluminum tripolyphosphate, 0.8 parts of defoamer, 1.2 parts of antioxidant and 500 parts of water;

[0035] The second composition comprises the following raw materials in parts by weight:

[0036] 10 parts of isocyanate, 30 parts of styrene, 0.4 parts of emulsifier and 60 parts of water;

[0037] The emulsifier is sodium lauryl sulfate;

[0038] The film-forming aid is acetone;

[0039] The dispersant is a cellulose derivative;

[0040] The defoaming agent is a silicone defoaming agent;

[0041] The antioxidant was antioxidant 1010.

[0042] The preparation method of the above-mentioned antibacterial and anticorrosive coating comprises the following steps:

[0043] (a) placing carbon nanotubes and nanosilver in water, stirring and drying to obtain a composite;

[0044] (b) mixing and emulsifying an acrylic emulsion, a liquid bisphenol A epoxy resin, water and an emulsifier to obtain a mixed emulsion; adding a dispersant, a defoamer and an antioxidant to the mixed emulsion and mixing them evenly; then, adding the composite, Xiuyan jade powder, nano titanium dioxide and aluminum tripolyphosphate and stirring them evenly to obtain a first composition;

[0045] (c) mixing and emulsifying isocyanate, styrene, an emulsifier and water to obtain a second composition;

[0046] (d) mixing the first composition and the second composition to obtain the antibacterial and anticorrosive coating.

[0047] Example 2

[0048] This embodiment is an antibacterial and anticorrosive coating, which is composed of a first composition and a second composition; the mass ratio of the first composition to the second composition is 1:0.6;

[0049] The first composition comprises the following raw materials in parts by weight:

[0050] 120 parts of acrylic emulsion, 45 parts of liquid bisphenol A epoxy resin, 4 parts of carbon nanotubes, 2 parts of nano silver, 200 parts of Xiuyu jade powder, 10 parts of nano titanium dioxide, 4 parts of emulsifier, 6 parts of film-forming aid, 3 parts of dispersant, 5 parts of aluminum tripolyphosphate, 1.2 parts of defoamer, 0.8 parts of antioxidant and 400 parts of water;

[0051] The second composition comprises the following raw materials in parts by weight:

[0052] 15 parts of isocyanate, 20 parts of styrene, 0.8 parts of emulsifier and 40 parts of water;

[0053] The emulsifier is sodium dodecylbenzene sulfonate;

[0054] The film-forming aid is xylene;

[0055] The dispersant is fatty acid polyethylene glycol ester;

[0056] The defoaming agent is a silicone defoaming agent;

[0057] The antioxidant is antioxidant 1076.

[0058] The preparation method of the above-mentioned antibacterial and anticorrosive coating comprises the following steps:

[0059] (a) placing carbon nanotubes and nanosilver in water, stirring and drying to obtain a composite;

[0060] (b) mixing and emulsifying an acrylic emulsion, a liquid bisphenol A epoxy resin, water and an emulsifier to obtain a mixed emulsion; adding a dispersant, a defoamer and an antioxidant to the mixed emulsion and mixing them evenly; then, adding the composite, Xiuyan jade powder, nano titanium dioxide and aluminum tripolyphosphate and stirring them evenly to obtain a first composition;

[0061] (c) mixing and emulsifying isocyanate, styrene, an emulsifier and water to obtain a second composition;

[0062] (d) mixing the first composition and the second composition to obtain the antibacterial and anticorrosive coating.

[0063] Example 3

[0064] This embodiment is an antibacterial and anticorrosive coating, which is composed of a first composition and a second composition; the mass ratio of the first composition to the second composition is 1:0.5;

[0065] The first composition comprises the following raw materials in parts by weight:

[0066] 120 parts of acrylic emulsion, 40 parts of liquid bisphenol A epoxy resin, 6 parts of carbon nanotubes, 1.5 parts of nano silver, 220 parts of Xiuyu jade powder, 8 parts of nano titanium dioxide, 6 parts of emulsifier, 5 parts of film-forming aid, 2 parts of dispersant, 4 parts of aluminum tripolyphosphate, 1 part of defoamer, 1 part of antioxidant and 450 parts of water;

[0067] The second composition comprises the following raw materials in parts by weight:

[0068] 12 parts of isocyanate, 25 parts of styrene, 0.6 parts of emulsifier and 50 parts of water;

[0069] The emulsifier is sodium dodecylbenzene sulfonate;

[0070] The film-forming aid is xylene;

[0071] The dispersant is fatty acid polyethylene glycol ester;

[0072] The defoaming agent is a silicone defoaming agent;

[0073] The antioxidant was antioxidant 1010.

[0074] The preparation method of the above-mentioned antibacterial and anticorrosive coating comprises the following steps:

[0075] (a) placing carbon nanotubes and nanosilver in water, stirring and drying to obtain a composite;

[0076] (b) mixing and emulsifying an acrylic emulsion, a liquid bisphenol A epoxy resin, water and an emulsifier to obtain a mixed emulsion; adding a dispersant, a defoamer and an antioxidant to the mixed emulsion and mixing them evenly; then, adding the composite, Xiuyan jade powder, nano titanium dioxide and aluminum tripolyphosphate and stirring them evenly to obtain a first composition;

[0077] (c) mixing and emulsifying isocyanate, styrene, an emulsifier and water to obtain a second composition;

[0078] (d) mixing the first composition and the second composition to obtain the antibacterial and anticorrosive coating.

[0079] Comparative Example 1

[0080] This comparative example is an antibacterial and anticorrosive coating, which is composed of a first composition and a second composition; the mass ratio of the first composition to the second composition is 1:0.5;

[0081] The first composition comprises the following raw materials in parts by weight:

[0082] 120 parts of acrylic emulsion, 6 parts of carbon nanotubes, 1.5 parts of nano silver, 220 parts of Xiuyu jade powder, 8 parts of nano titanium dioxide, 6 parts of emulsifier, 5 parts of film-forming aid, 2 parts of dispersant, 4 parts of aluminum tripolyphosphate, 1 part of defoamer, 1 part of antioxidant and 450 parts of water;

[0083] The second composition comprises the following raw materials in parts by weight:

[0084] 12 parts of isocyanate, 25 parts of styrene, 0.6 parts of emulsifier and 50 parts of water;

[0085] The emulsifier is sodium dodecylbenzene sulfonate;

[0086] The film-forming aid is xylene;

[0087] The dispersant is fatty acid polyethylene glycol ester;

[0088] The defoaming agent is a silicone defoaming agent;

[0089] The antioxidant was antioxidant 1010.

[0090] The preparation method of the above-mentioned antibacterial and anticorrosive coating comprises the following steps:

[0091] (a) placing carbon nanotubes and nanosilver in water, stirring and drying to obtain a composite;

[0092] (b) mixing and emulsifying an acrylic emulsion, water and an emulsifier to obtain a mixed emulsion; adding a dispersant, a defoamer and an antioxidant to the mixed emulsion and mixing them evenly; then, adding the composite, Xiuyan jade powder, nano titanium dioxide and aluminum tripolyphosphate and stirring them evenly to obtain a first composition;

[0093] (c) mixing and emulsifying isocyanate, styrene, an emulsifier and water to obtain a second composition;

[0094] (d) mixing the first composition and the second composition to obtain the antibacterial and anticorrosive coating.

[0095] Comparative Example 2

[0096] This comparative example is an antibacterial and anticorrosive coating, which is composed of a first composition and a second composition; the mass ratio of the first composition to the second composition is 1:0.5;

[0097] The first composition comprises the following raw materials in parts by weight:

[0098] 120 parts of acrylic emulsion, 40 parts of liquid bisphenol A epoxy resin, 6 parts of carbon nanotubes, 1.5 parts of nano silver, 220 parts of Xiuyu jade powder, 8 parts of nano titanium dioxide, 6 parts of emulsifier, 5 parts of film-forming aid, 2 parts of dispersant, 4 parts of aluminum tripolyphosphate, 1 part of defoamer, 1 part of antioxidant and 450 parts of water;

[0099] The second composition comprises the following raw materials in parts by weight:

[0100] 37 parts of isocyanate, 0.6 parts of emulsifier and 50 parts of water;

[0101] The emulsifier is sodium dodecylbenzene sulfonate;

[0102] The film-forming aid is xylene;

[0103] The dispersant is fatty acid polyethylene glycol ester;

[0104] The defoaming agent is a silicone defoaming agent;

[0105] The antioxidant was antioxidant 1010.

[0106] The preparation method of the above-mentioned antibacterial and anticorrosive coating comprises the following steps:

[0107] (a) placing carbon nanotubes and nanosilver in water, stirring and drying to obtain a composite;

[0108] (b) mixing and emulsifying an acrylic emulsion, a liquid bisphenol A epoxy resin, water and an emulsifier to obtain a mixed emulsion; adding a dispersant, a defoamer and an antioxidant to the mixed emulsion and mixing them evenly; then, adding the composite, Xiuyan jade powder, nano titanium dioxide and aluminum tripolyphosphate and stirring them evenly to obtain a first composition;

[0109] (c) mixing and emulsifying the isocyanate, the emulsifier and water to obtain a second composition;

[0110] (d) mixing the first composition and the second composition to obtain the antibacterial and anticorrosive coating.

[0111] Comparative Example 3

[0112] This comparative example is an antibacterial and anticorrosive coating, which is composed of a first composition and a second composition; the mass ratio of the first composition to the second composition is 1:0.5;

[0113] The first composition comprises the following raw materials in parts by weight:

[0114] 120 parts of acrylic emulsion, 40 parts of liquid bisphenol A epoxy resin, 6 parts of carbon nanotubes, 1.5 parts of nano silver, 220 parts of Xiuyu jade powder, 8 parts of nano titanium dioxide, 6 parts of emulsifier, 5 parts of film-forming aid, 2 parts of dispersant, 4 parts of aluminum tripolyphosphate, 1 part of defoamer, 1 part of antioxidant and 450 parts of water;

[0115] The second composition comprises the following raw materials in parts by weight:

[0116] 12 parts of isocyanate, 25 parts of styrene, 0.6 parts of emulsifier and 50 parts of water;

[0117] The emulsifier is sodium dodecylbenzene sulfonate;

[0118] The film-forming aid is xylene;

[0119] The dispersant is fatty acid polyethylene glycol ester;

[0120] The defoaming agent is a silicone defoaming agent;

[0121] The antioxidant was antioxidant 1010.

[0122] The preparation method of the above-mentioned antibacterial and anticorrosive coating comprises the following steps:

[0123] (a) mixing and emulsifying an acrylic emulsion, a liquid bisphenol A epoxy resin, water and an emulsifier to obtain a mixed emulsion; adding a dispersant, a defoamer and an antioxidant to the mixed emulsion and mixing them evenly; then, adding carbon nanotubes, nano silver, Xiuyan jade powder, nano titanium dioxide and aluminum tripolyphosphate and stirring them evenly to obtain a first composition;

[0124] (b) mixing and emulsifying isocyanate, styrene, an emulsifier and water to obtain a second composition;

[0125] (c) mixing the first composition and the second composition to obtain the antibacterial and anticorrosive coating.

[0126] Experimental example

[0127] The antibacterial and anticorrosive coatings prepared in Example 3 and Comparative Examples 1 to 3 were obtained respectively.

[0128] Anti-corrosion performance test: apply the antibacterial anti-corrosion coating on the sample plate, place the sample plate in a solution with a sodium chloride concentration of 8% and a pH of 3, and observe the bubbling time; alkali resistance test: place the sample plate in a sodium hydroxide solution with a pH of 11.5, and observe the bubbling time;

[0129] Waterproof test:

[0130] Place the sample plate in water and count the time without abnormality;

[0131] Antibacterial test: According to the method in GB / T 21866-2008, the test was conducted on Staphylococcus aureus;

[0132] The experimental results are shown in Table 1:

[0133] Table 1

[0134]

[0135]

[0136] It can be seen from Table 1 that, compared with the comparative example, the present application, through the selection of various raw materials, makes the prepared coating have more excellent waterproof and anti-corrosion properties. Compared with comparative example 3, the present application can make the nanosilver better dispersed in the coating by loading the nanosilver into the carbon nanotubes, and at the same time, can better retain the activity of the nanosilver, thereby achieving a better antibacterial effect.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. An antibacterial and anticorrosive coating, characterized in that: The antibacterial and anticorrosive coating is composed of a first composition and a second composition; The first composition comprises the following raw materials in parts by weight: 100-120 parts of acrylic emulsion, 35-45 parts of liquid bisphenol A epoxy resin, 4-8 parts of carbon nanotubes, 1-2 parts of nano silver, 200-250 parts of Xiuyu jade powder, 6-10 parts of nano titanium dioxide, 4-8 parts of emulsifier, 4-6 parts of film-forming aid, 1-3 parts of dispersant, 3-5 parts of aluminum tripolyphosphate, 0.8-1.2 parts of defoamer, 0.8-1.2 parts of antioxidant and 400-500 parts of water; The second composition comprises the following raw materials in parts by weight: 10-15 parts of isocyanate, 20-30 parts of styrene, 0.4-0.8 parts of emulsifier and 40-60 parts of water.

2. The antibacterial and anticorrosive coating according to claim 1, characterized in that: The first composition comprises the following raw materials in parts by weight: 120 parts of acrylic emulsion, 40 parts of liquid bisphenol A epoxy resin, 6 parts of carbon nanotubes, 1.5 parts of nano silver, 220 parts of Xiuyan jade powder, 8 parts of nano titanium dioxide, 6 parts of emulsifier, 5 parts of film-forming aid, 2 parts of dispersant, 4 parts of aluminum tripolyphosphate, 1 part of defoamer, 1 part of antioxidant and 450 parts of water.

3. The antibacterial and anticorrosive coating according to claim 1, characterized in that: The second composition comprises the following raw materials in parts by weight: 12 parts of isocyanate, 25 parts of styrene, 0.6 parts of emulsifier and 50 parts of water.

4. The antibacterial and anticorrosive coating according to claim 1, characterized in that: The mass ratio of the first composition to the second composition is 1:(0.4-0.6).

5. The antibacterial and anticorrosive coating according to claim 1, characterized in that: The emulsifier is sodium dodecyl sulfate and / or sodium dodecylbenzene sulfonate.

6. The antibacterial and anticorrosive coating according to claim 1, characterized in that: The film-forming aid is acetone or xylene.

7. The antibacterial and anticorrosive coating according to claim 1, characterized in that: The dispersant is a cellulose derivative, fatty acid polyethylene glycol ester or methyl amyl alcohol.

8. The antibacterial and anticorrosive coating according to claim 1, characterized in that: The defoaming agent is a silicone defoaming agent.

9. The antibacterial and anticorrosive coating according to claim 1, characterized in that: The antioxidant is antioxidant 1010 or antioxidant 1076.

10. The method for preparing the antibacterial and anticorrosive coating according to any one of claims 1 to 9, characterized in that: The steps include: (a) placing carbon nanotubes and nanosilver in water, stirring and drying to obtain a composite; (b) mixing and emulsifying an acrylic emulsion, a liquid bisphenol A epoxy resin, water and an emulsifier to obtain a mixed emulsion; adding a dispersant, a defoamer and an antioxidant to the mixed emulsion and mixing them evenly; then, adding the composite, Xiuyan jade powder, nano titanium dioxide and aluminum tripolyphosphate and stirring them evenly to obtain a first composition; (c) mixing and emulsifying isocyanate, styrene, an emulsifier and water to obtain a second composition; (d) mixing the first composition and the second composition to obtain the antibacterial and anticorrosive coating.

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