Environment-friendly antibacterial colored paint and preparation method thereof

Abstract

The invention discloses environment-friendly antibacterial colored paint and a preparation method thereof, and relates to the technical field of environment-friendly paint. The preparation method comprises the following steps: firstly, reacting 4-vinyl benzaldehyde with hexadecylamine to prepare a Schiff base compound, and further performing addition polymerization reaction on the generated Schiff base compound and acrylic acid under the action of a catalyst to prepare a coating substrate material with antibacterial and anti-pollution effects. The preparation method comprises the following steps: preparing hollow glass beads, pretreating the hollow glass beads with sodium hydroxide, carrying out graft modification on the treated hollow glass beads with 1, 6-hexanediol to obtain self-made modified hollow glass beads, adding the modified hollow glass beads into a coating, and compounding the modified hollow glass beads with a fuel additive, a defoaming agent and a thickening agent to obtain the environment-friendly antibacterial colored paint. According to the environment-friendly antibacterial colored paint prepared by the preparation method disclosed by the invention, on the basis of realizing high antibacterial performance, the water resistance, the pollution resistance, the cracking resistance and the like of the paint are effectively improved, and the multifunctional environment-friendly antibacterial colored paint is formed.

Description

Technical Field

[0001] The invention relates to the technical field of environmentally friendly colored paint, in particular to an environmentally friendly antibacterial colored paint and a preparation method thereof. Background Art

[0002] In recent years, public health incidents have occurred frequently, making people pay more attention to the sanitation of the environment. Antibacterial colored paint, as a coating that can effectively reduce the risk of disease transmission and infection, has received widespread attention and demand. In particular, public places such as hospitals, museums, and office buildings have strict requirements for their internal hygiene. The application of environmentally friendly antibacterial colored paint in the field of construction mainly includes interior decoration, exterior wall colored paint, roof colored paint, etc. These applications require not only environmental protection and antibacterial properties of colored paint, but also good weather resistance, wear resistance and adhesion. At present, environmentally friendly antibacterial colored paint mainly adds special antibacterial ingredients to colored paint, such as nano-silver, nano-titanium dioxide and other antibacterial materials, so that the colored paint has a lasting bactericidal ability. These antibacterial materials can effectively inhibit and kill common microorganisms such as bacteria, molds and fungi, prevent them from multiplying and growing on the surface, thereby reducing the risk of cross infection.

[0003] However, most of the current antibacterial colored paints are made by directly adding antibacterial ingredients into the colored paint in the form of additives to achieve the antibacterial function of the colored paint in a compounding manner. As the colored paint is used, the antibacterial ingredients will gradually decrease, the antibacterial function will gradually disappear, and the antibacterial durability cannot be guaranteed. Therefore, it is urgent to develop an environmentally friendly colored paint that can achieve long-term antibacterial function. Summary of the invention

[0004] The purpose of the present invention is to provide an environmentally friendly antibacterial colored paint and a preparation method thereof, so as to solve the problems existing in the prior art.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an environmentally friendly antibacterial colored paint, which comprises a homemade acrylic polymer emulsion, a modified hollow glass bead filler, a dye auxiliary, a defoamer, a thickener, and water.

[0006] Furthermore, the self-made acrylic polymer emulsion is prepared by reacting 4-vinylbenzaldehyde with hexadecylamine in advance, and then mixing with acrylic acid, azobisisobutyronitrile, sodium dodecyl sulfate, allyl octylphenol polyoxyethylene ether and water.

[0007] Furthermore, the modified hollow glass bead filler is obtained by pre-treating the hollow glass beads with sodium hydroxide and then graft-modifying the treated hollow glass beads with hexylene glycol.

[0008] Furthermore, the dye auxiliary agent is one or more of carbon black, red iron oxide, yellow iron oxide, phthalocyanine blue, phthalocyanine green, scarlet, fast yellow, and permanent violet.

[0009] Furthermore, the defoaming agent is a silicone defoaming agent, and the thickening agent is one or more of cellulose, starch, alginic acid, and pectin.

[0010] Furthermore, a method for preparing an environmentally friendly antibacterial colored paint comprises the following preparation steps:

[0011] (1) 5 to 10 parts of hexadecylamine and 100 to 200 parts of anhydrous ethanol are mixed, heated at 40 to 70° C. for 10 to 30 minutes to completely dissolve the hexadecylamine to obtain a solution A, 10 to 20 parts of 4-vinylbenzaldehyde are added to 100 to 200 parts of anhydrous ethanol, and 0.5 to 3 parts of acetic acid are added to obtain a solution B, and the solution B is added dropwise to the solution A at a rate of 1 to 5 drops / second at a rate of 200 to 400 r / min under an oil bath condition of 70 to 120° C., and heated for 6 to 12 hours, and then cooled to room temperature, filtered, and the filter cake is rinsed with anhydrous ethanol for 3 to 8 times, and dried at 60 to 100° C. for 8 to 12 hours to obtain a Schiff base compound;

[0012] (2) After the Schiff base compound, acrylic acid, azobisisobutyronitrile, sodium dodecyl sulfate, allyl octylphenol polyoxyethylene ether, and water are mixed and sealed, the mixture is stirred at a speed of 200 to 400 r / min for 10 to 20 hours in an oil bath at 60 to 80° C. under a nitrogen atmosphere, and the mixture is cooled to room temperature to obtain a self-made acrylic polymer emulsion;

[0013] (3) taking 5 to 15 parts of the dried hollow glass beads and placing them in 200 to 400 parts of a sodium hydroxide solution with a concentration of 0.1 to 0.4 mol / L, stirring at 60 to 90° C. and 200 to 500 r / min for 1 to 3 hours, cooling to room temperature, washing with deionized water until the pH is 6.8 to 7.2, filtering and drying at 90 to 120° C. for 1 to 4 hours to obtain pretreated hollow glass beads;

[0014] (4) mixing the pretreated hollow glass beads, anhydrous ethanol, deionized water, and hexylene glycol, stirring at 60-100° C. and 200-400 r / min for 1-4 h, cooling to room temperature, washing the product 3-6 times with 95% by volume ethanol, and filtering under reduced pressure, and drying the filtered hollow glass beads at 80-120° C. for 8-16 h to obtain a modified hollow glass bead filler;

[0015] (5) The homemade acrylic polymer emulsion, modified hollow glass bead filler, dye auxiliary, defoamer, thickener and water are mixed and heated and stirred for 30 to 60 minutes, and the pH value is adjusted to 6.5 to 7.5 with ammonia water to obtain an environmentally friendly antibacterial colored paint.

[0016] Furthermore, in the step (2), the mass ratio of the Schiff base compound, acrylic acid, azobisisobutyronitrile, sodium dodecyl sulfate, allyl octylphenol polyoxyethylene ether, and water is 10-20:10-20:0.5-1:1-5:1-5:60-90.

[0017] Furthermore, in the step (4), the mass ratio of the pretreated hollow glass beads, anhydrous ethanol, deionized water, and hexylene glycol is 5-20:100-200:100-200:1-10.

[0018] Furthermore, in the step (5), the mass ratio of the self-made acrylic polymer emulsion, the modified hollow glass bead filler, the dye auxiliary, the defoamer, the thickener, and the water is 30-50: 5-10: 0.2-0.8: 0.5-1: 0.5-1: 50-80.

[0019] Furthermore, in step (5), the heating temperature is 30-60° C. and the stirring speed is 400-600 r / min.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0021] The environmentally friendly antibacterial colored paint prepared by the present invention effectively improves the waterproofness, antifouling and anti-cracking properties of the paint on the basis of achieving high antibacterial performance, thereby forming a multifunctional environmentally friendly antibacterial colored paint.

[0022] First, 4-vinylbenzaldehyde is reacted with hexadecylamine to prepare a Schiff base compound, and the generated Schiff base compound is further reacted with acrylic acid under the action of a catalyst to achieve a polyaddition reaction to prepare a coating base material with its own antibacterial and antifouling effects. The use of 4-vinylbenzaldehyde introduces double bonds in the generated Schiff base compound. The presence of double bonds allows it to be efficiently and firmly combined with acrylic acid through a polyaddition reaction, so that the coating base material has its own antibacterial activity, forming a new type of antibacterial coating. The introduction of antibacterial groups in the base can effectively enhance the antibacterial effect of the colored paint, making the antibacterial effect more lasting, and achieving the long-term antibacterial function of the coating. The use of hexadecylamine introduces hydrophobic groups into the system, increases the spatial repulsion and electrostatic repulsion of the coating, reduces the surface energy, resists or prevents the initial landing and reproduction of bacteria, and achieves the effect of anti-biological pollution.

[0023] Secondly, the hollow glass beads are pretreated with sodium hydroxide, and then the hollow glass beads obtained after the treatment are grafted and modified with 1,6-hexanediol to obtain self-made modified hollow glass beads, and then the modified hollow glass beads are added to the coating to effectively improve the performance of the coating. The hydroxyl activity on the surface of the pretreated hollow glass beads is activated, and 1,6-hexanediol can be effectively grafted to its surface. In the process of coating film formation, the hydroxyl group at the other end of the hexanediol undergoes an esterification reaction with the carboxyl functional group in the above-mentioned coating base, so that the hollow glass beads are tightly bonded to the surface of the paint film through chemical bonds, and the hollow structure of the hollow glass beads makes the formed paint have better crack resistance and efficient sound insulation and heat preservation performance. DETAILED DESCRIPTION

[0024] The following will be combined with 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 making creative work are within the scope of protection of the present invention.

[0025] In order to more clearly illustrate the method provided by the present invention, the following examples are used to describe in detail the various index testing methods of the environmentally friendly antibacterial colored paint prepared in the following examples are as follows:

[0026] Volatile organic matter content: According to the standard GB / T 38597-2020, the volatile organic matter content of the environmentally friendly antibacterial colored paints prepared in Examples 1-3 and Comparative Examples 1-3 was measured;

[0027] Antibacterial property: According to the standard GB / T 21866-2008, the environmentally friendly antibacterial colored paints prepared in Examples 1-3 and Comparative Examples 1-3 were tested for antibacterial properties;

[0028] Antifouling property: According to the standard GB / T 9780-2013, the environmentally friendly antibacterial colored paints obtained in Examples 1-3 and Comparative Examples 1-3 were tested for antifouling property;

[0029] Impact strength: According to GB / T 1732-1993, the environmentally friendly antibacterial colored paints obtained in Examples 1-3 and Comparative Examples 1-3 were tested for impact strength.

[0030] Example 1

[0031] (1) 5 parts of hexadecylamine and 100 parts of anhydrous ethanol were mixed, and the mixture was heated at 60° C. for 30 min to completely dissolve the hexadecylamine to obtain a solution A. 10 parts of 4-vinylbenzaldehyde were added to 100 parts of anhydrous ethanol, and 0.5 parts of acetic acid were added to obtain a solution B. Solution B was added dropwise to solution A at a rate of 3 drops / second at a rate of 300 r / min under an oil bath condition at 90° C., and the mixture was heated for 8 h. The mixture was then cooled to room temperature, filtered, and the filter cake was rinsed with anhydrous ethanol for 5 times, and dried at 90° C. for 10 h to obtain a Schiff base compound.

[0032] (2) 10 parts of a Schiff base compound, 10 parts of acrylic acid, 0.5 parts of azobisisobutyronitrile, 1 part of sodium dodecyl sulfate, 1 part of allyl octylphenol polyoxyethylene ether, and 60 parts of water were mixed and sealed, and then stirred at 300 r / min for 15 h in a 70° C. oil bath under a nitrogen atmosphere, and cooled to room temperature to obtain a homemade acrylic polymer emulsion;

[0033] (3) taking 5 parts of the dried hollow glass beads and placing them in 200 parts of a 0.3 mol / L sodium hydroxide solution, stirring at 80° C. and 400 r / min for 3 h, cooling to room temperature, washing with deionized water until the pH is 7.0, filtering and drying at 100° C. for 3 h to obtain pretreated hollow glass beads;

[0034] (4) 5 parts of pretreated hollow glass beads, 100 parts of anhydrous ethanol, 100 parts of deionized water, and 1 part of hexylene glycol were mixed, stirred at 80° C. and 400 r / min for 3 h, cooled to room temperature, washed the product 5 times with 95% by volume ethanol, and filtered under reduced pressure. The hollow glass beads after filtration were dried at 90° C. for 14 h to obtain a modified hollow glass bead filler;

[0035] (5) 30 parts of a homemade acrylic polymer emulsion, 5 parts of a modified hollow glass bead filler, 0.2 parts of red iron oxide, 0.5 parts of polydimethylsiloxane, 0.5 parts of carboxymethyl cellulose, and 50 parts of water were mixed, heated and stirred for 50 minutes, and the pH value was adjusted to 7.0 with aqueous ammonia to obtain an environmentally friendly antibacterial colored paint.

[0036] Example 2

[0037] (1) 8 parts of hexadecylamine and 150 parts of anhydrous ethanol were mixed, and the mixture was heated at 60° C. for 30 min to completely dissolve the hexadecylamine to obtain a solution A. 15 parts of 4-vinylbenzaldehyde were added to 150 parts of anhydrous ethanol, and 1.5 parts of acetic acid were added to obtain a solution B. Solution B was added dropwise to solution A at a rate of 3 drops / second at a rate of 300 r / min under an oil bath condition of 90° C., and the mixture was heated for 8 h. The mixture was then cooled to room temperature, filtered, and the filter cake was rinsed with anhydrous ethanol for 5 times, and dried at 90° C. for 10 h to obtain a Schiff base compound.

[0038] (2) 15 parts of a Schiff base compound, 15 parts of acrylic acid, 0.8 parts of azobisisobutyronitrile, 3 parts of sodium dodecyl sulfate, 3 parts of allyl octylphenol polyoxyethylene ether, and 75 parts of water were mixed and sealed, and then stirred at 300 r / min for 15 h in a 70° C. oil bath under a nitrogen atmosphere, and cooled to room temperature to obtain a homemade acrylic polymer emulsion;

[0039] (3) taking 10 parts of the dried hollow glass beads and placing them in 300 parts of a sodium hydroxide solution with a concentration of 0.3 mol / L, stirring at 80° C. and 400 r / min for 3 h, cooling to room temperature, washing with deionized water until the pH is 7.0, filtering and drying at 100° C. for 3 h to obtain pretreated hollow glass beads;

[0040] (4) 15 parts of pretreated hollow glass beads, 150 parts of anhydrous ethanol, 150 parts of deionized water, and 5 parts of hexylene glycol were mixed, stirred at 80° C. and 400 r / min for 3 h, cooled to room temperature, and the product was washed 5 times with 95% by volume ethanol, and filtered under reduced pressure. The hollow glass beads after filtration were dried at 90° C. for 14 h to obtain a modified hollow glass bead filler;

[0041] (5) 40 parts of a homemade acrylic polymer emulsion, 8 parts of a modified hollow glass bead filler, 0.5 parts of red iron oxide, 0.8 parts of polydimethylsiloxane, 0.8 parts of carboxymethyl cellulose, and 60 parts of water were mixed, heated and stirred for 50 minutes, and the pH value was adjusted to 7.0 with ammonia water to obtain an environmentally friendly antibacterial colored paint.

[0042] Example 3

[0043] (1) 10 parts of hexadecylamine and 200 parts of anhydrous ethanol were mixed, and the mixture was heated at 60° C. for 30 min to completely dissolve the hexadecylamine to obtain a solution A. 20 parts of 4-vinylbenzaldehyde were added to 200 parts of anhydrous ethanol, and 3 parts of acetic acid were added to obtain a solution B. Solution B was added dropwise to solution A at a rate of 3 drops / second at a rate of 300 r / min under an oil bath condition at 90° C., and the mixture was heated for 8 h. The mixture was then cooled to room temperature, filtered, and the filter cake was rinsed with anhydrous ethanol for 5 times, and dried at 90° C. for 10 h to obtain a Schiff base compound.

[0044] (2) 20 parts of Schiff base compound, 20 parts of acrylic acid, 1 part of azobisisobutyronitrile, 5 parts of sodium dodecyl sulfate, 5 parts of allyl octylphenol polyoxyethylene ether, and 90 parts of water were mixed and sealed, and stirred at 300 r / min for 15 h in a 70° C. oil bath under a nitrogen atmosphere, and cooled to room temperature to obtain a homemade acrylic polymer emulsion;

[0045] (3) taking 15 parts of the dried hollow glass beads and placing them in 400 parts of a 0.3 mol / L sodium hydroxide solution, stirring at 80° C. and 400 r / min for 3 h, cooling to room temperature, washing with deionized water until the pH is 7.0, filtering and drying at 100° C. for 3 h to obtain pretreated hollow glass beads;

[0046] (4) 20 parts of pretreated hollow glass beads, 200 parts of anhydrous ethanol, 200 parts of deionized water, and 10 parts of hexylene glycol were mixed, stirred at 80° C. and 400 r / min for 3 h, cooled to room temperature, and the product was washed 5 times with 95% by volume ethanol, and filtered under reduced pressure. The hollow glass beads after filtration were dried at 90° C. for 14 h to obtain a modified hollow glass bead filler;

[0047] (5) 50 parts of a homemade acrylic polymer emulsion, 10 parts of a modified hollow glass bead filler, 0.8 parts of red iron oxide, 1 part of polydimethylsiloxane, 1 part of carboxymethyl cellulose, and 80 parts of water were mixed, heated and stirred for 50 minutes, and the pH value was adjusted to 7.0 with ammonia water to obtain an environmentally friendly antibacterial colored paint.

[0048] Comparative Example 1

[0049] (1) 15 parts of acrylic acid, 0.8 parts of azobisisobutyronitrile, 3 parts of sodium dodecyl sulfate, 3 parts of allyl octylphenol polyoxyethylene ether, and 75 parts of water were mixed and sealed, and stirred at 300 r / min for 15 hours in a 70° C. oil bath under a nitrogen atmosphere, and cooled to room temperature to obtain a homemade acrylic polymer emulsion;

[0050] (2) taking 10 parts of dried hollow glass beads and placing them in 300 parts of a sodium hydroxide solution with a concentration of 0.3 mol / L, stirring at 80° C. and 400 r / min for 3 h, cooling to room temperature, washing with deionized water until the pH is 7.0, filtering and drying at 100° C. for 3 h to obtain pretreated hollow glass beads;

[0051] (3) 15 parts of pretreated hollow glass beads, 150 parts of anhydrous ethanol, 150 parts of deionized water, and 5 parts of hexylene glycol were mixed, stirred at 80° C. and 400 r / min for 3 h, cooled to room temperature, and the product was washed 5 times with 95% by volume ethanol, and filtered under reduced pressure. The hollow glass beads after filtration were dried at 90° C. for 14 h to obtain a modified hollow glass bead filler;

[0052] (4) 40 parts of a homemade acrylic polymer emulsion, 8 parts of a modified hollow glass bead filler, 0.5 parts of red iron oxide, 0.8 parts of polydimethylsiloxane, 0.8 parts of carboxymethyl cellulose, and 60 parts of water were mixed, heated and stirred for 50 minutes, and the pH value was adjusted to 7.0 with aqueous ammonia to obtain an environmentally friendly antibacterial colored paint.

[0053] Comparative Example 2

[0054] (1) 8 parts of hexadecylamine and 150 parts of anhydrous ethanol were mixed, and the mixture was heated at 60° C. for 30 min to completely dissolve the hexadecylamine to obtain a solution A. 15 parts of 4-vinylbenzaldehyde were added to 150 parts of anhydrous ethanol, and 1.5 parts of acetic acid were added to obtain a solution B. Solution B was added dropwise to solution A at a rate of 3 drops / second at a rate of 300 r / min under an oil bath condition of 90° C., and the mixture was heated for 8 h. The mixture was then cooled to room temperature, filtered, and the filter cake was rinsed with anhydrous ethanol for 5 times, and dried at 90° C. for 10 h to obtain a Schiff base compound.

[0055] (2) 15 parts of a Schiff base compound, 15 parts of acrylic acid, 0.8 parts of azobisisobutyronitrile, 3 parts of sodium dodecyl sulfate, 3 parts of allyl octylphenol polyoxyethylene ether, and 75 parts of water were mixed and sealed, and then stirred at 300 r / min for 15 h in a 70° C. oil bath under a nitrogen atmosphere, and cooled to room temperature to obtain a homemade acrylic polymer emulsion;

[0056] (3) 40 parts of a homemade acrylic polymer emulsion, 8 parts of dry hollow glass bead filler, 0.5 parts of red iron oxide, 0.8 parts of polydimethylsiloxane, 0.8 parts of carboxymethyl cellulose, and 60 parts of water were mixed, heated and stirred for 50 minutes, and the pH value was adjusted to 7.0 with ammonia water to obtain an environmentally friendly antibacterial colored paint.

[0057] Comparative Example 3

[0058] (1) 8 parts of ethylenediamine and 150 parts of anhydrous ethanol were mixed, and heated at 60° C. for 30 min to completely dissolve the hexadecylamine to obtain a solution A. 15 parts of 4-vinylbenzaldehyde were added to 150 parts of anhydrous ethanol, and 1.5 parts of acetic acid were added to obtain a solution B. Solution B was added dropwise to solution A at a rate of 3 drops / second at a rate of 300 r / min under an oil bath condition of 90° C., and heated for 8 h. The mixture was then cooled to room temperature, filtered, and the filter cake was rinsed with anhydrous ethanol for 5 times, and dried at 90° C. for 10 h to obtain a Schiff base compound.

[0059] (2) 15 parts of a Schiff base compound, 15 parts of acrylic acid, 0.8 parts of azobisisobutyronitrile, 3 parts of sodium dodecyl sulfate, 3 parts of allyl octylphenol polyoxyethylene ether, and 75 parts of water were mixed and sealed, and then stirred at 300 r / min for 15 h in a 70° C. oil bath under a nitrogen atmosphere, and cooled to room temperature to obtain a homemade acrylic polymer emulsion;

[0060] (3) taking 10 parts of the dried hollow glass beads and placing them in 300 parts of a sodium hydroxide solution with a concentration of 0.3 mol / L, stirring at 80° C. and 400 r / min for 3 h, cooling to room temperature, washing with deionized water until the pH is 7.0, filtering and drying at 100° C. for 3 h to obtain pretreated hollow glass beads;

[0061] (4) 15 parts of pretreated hollow glass beads, 150 parts of anhydrous ethanol, 150 parts of deionized water, and 5 parts of hexylene glycol were mixed, stirred at 80° C. and 400 r / min for 3 h, cooled to room temperature, and the product was washed 5 times with 95% by volume ethanol, and filtered under reduced pressure. The hollow glass beads after filtration were dried at 90° C. for 14 h to obtain a modified hollow glass bead filler;

[0062] (5) 40 parts of a homemade acrylic polymer emulsion, 8 parts of a modified hollow glass bead filler, 0.5 parts of red iron oxide, 0.8 parts of polydimethylsiloxane, 0.8 parts of carboxymethyl cellulose, and 60 parts of water were mixed, heated and stirred for 50 minutes, and the pH value was adjusted to 7.0 with ammonia water to obtain an environmentally friendly antibacterial colored paint.

[0063] Effect example

[0064] The following Table 1 shows the analysis results of the volatile organic matter content, antibacterial performance, and antifouling performance of Examples 1 to 3 of the present invention and Comparative Examples 1 to 3.

[0065] Table 1 Results of volatile organic matter content, antibacterial property and antifouling property of environmentally friendly antibacterial colored paints prepared in Examples 1 to 3 and Comparative Examples 1 to 3

[0066]

[0067]

[0068] From the results in Table 1, we found that the volatile organic matter content of the environmentally friendly antibacterial colored paint prepared by this method is all below 50%, which meets the national standards and belongs to environmentally friendly colored paint. From the antibacterial results of Examples 1-3 and Comparative Example 1, it is found that the environmentally friendly colored paint prepared by the present invention has excellent antibacterial effect and strong antibacterial durability, while the antibacterial and antibacterial durability of the colored paint without the addition of the Schiff base compound prepared by the present invention are not up to standard, which further illustrates that the prepared Schiff base has a higher antibacterial effect. When the antibacterial group is added to the base of the colored paint, the antibacterial effect of the paint is also more durable. From the antifouling effect of the paint, we found that the introduction of long-chain alkylamine into the system can effectively enhance the antifouling effect of the paint. The addition of hollow glass beads effectively improves the impact resistance of the paint, but if the hollow glass beads are not modified, the effect of the hollow glass beads is significantly reduced.

[0069] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and scope of the equivalent elements of the claims be included in the invention. Any marking in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An environmentally friendly antibacterial colored paint, characterized in that: The environmentally friendly antibacterial colored paint comprises a self-made acrylic polymer emulsion, a modified hollow glass bead filler, a dye auxiliary, a defoamer, a thickener and water.

2. The environmentally friendly antibacterial colored paint according to claim 1, characterized in that: The self-made acrylic polymer emulsion is prepared by preliminarily reacting 4-vinylbenzaldehyde with hexadecylamine, and then further reacting with acrylic acid, azobisisobutyronitrile, sodium dodecyl sulfate, allyl octylphenol polyoxyethylene ether and water.

3. The environmentally friendly antibacterial colored paint according to claim 1, characterized in that: The modified hollow glass bead filler is obtained by pre-treating the hollow glass beads with sodium hydroxide and then grafting and modifying the treated hollow glass beads with hexylene glycol.

4. The environmentally friendly antibacterial colored paint according to claim 1, characterized in that: The dye auxiliary agent is one or more of carbon black, red iron oxide, yellow iron oxide, phthalocyanine blue, phthalocyanine green, scarlet, fast yellow and permanent violet.

5. The environmentally friendly antibacterial colored paint according to claim 1, characterized in that: The defoaming agent is an organosilicon defoaming agent, and the thickening agent is one or more of cellulose, starch, alginic acid, and pectin.

6. A method for preparing an environmentally friendly antibacterial colored paint, characterized in that: The method comprises the following preparation steps: (1) 5 to 10 parts of hexadecylamine and 100 to 200 parts of anhydrous ethanol are mixed, heated at 40 to 70° C. for 10 to 30 minutes to completely dissolve the hexadecylamine to obtain a solution A, 10 to 20 parts of 4-vinylbenzaldehyde are added to 100 to 200 parts of anhydrous ethanol, and 0.5 to 3 parts of acetic acid are added to obtain a solution B, and the solution B is added dropwise to the solution A at a rate of 1 to 5 drops / second at a rate of 200 to 400 r / min under an oil bath condition of 70 to 120° C., and heated for 6 to 12 hours, and then cooled to room temperature, filtered, and the filter cake is rinsed with anhydrous ethanol for 3 to 8 times, and dried at 60 to 100° C. for 8 to 12 hours to obtain a Schiff base compound; (2) After the Schiff base compound, acrylic acid, azobisisobutyronitrile, sodium dodecyl sulfate, allyl octylphenol polyoxyethylene ether, and water are mixed and sealed, the mixture is stirred at a speed of 200 to 400 r / min for 10 to 20 hours in an oil bath at 60 to 80° C. under a nitrogen atmosphere, and the mixture is cooled to room temperature to obtain a self-made acrylic polymer emulsion; (3) taking 5 to 15 parts of the dried hollow glass beads and placing them in 200 to 400 parts of a sodium hydroxide solution with a concentration of 0.1 to 0.4 mol / L, stirring at 60 to 90° C. and 200 to 500 r / min for 1 to 3 hours, cooling to room temperature, washing with deionized water until the pH is 6.8 to 7.2, filtering and drying at 90 to 120° C. for 1 to 4 hours to obtain pretreated hollow glass beads; (4) mixing the pretreated hollow glass beads, anhydrous ethanol, deionized water, and hexylene glycol, stirring at 60-100° C. and 200-400 r / min for 1-4 h, cooling to room temperature, washing the product 3-6 times with 95% by volume ethanol, and filtering under reduced pressure, and drying the filtered hollow glass beads at 80-120° C. for 8-16 h to obtain a modified hollow glass bead filler; (5) The homemade acrylic polymer emulsion, modified hollow glass bead filler, dye auxiliary, defoamer, thickener and water are mixed and heated and stirred for 30 to 60 minutes, and the pH value is adjusted to 6.5 to 7.5 with ammonia water to obtain an environmentally friendly antibacterial colored paint.

7. The method for preparing an environmentally friendly antibacterial colored paint according to claim 6, characterized in that: In the step (2), the mass ratio of the Schiff base compound, acrylic acid, azobisisobutyronitrile, sodium dodecyl sulfate, allyl octylphenol polyoxyethylene ether, and water is 10-20:10-20:0.5-1:1-5:1-5:60-90.

8. The method for preparing an environmentally friendly antibacterial colored paint according to claim 6, characterized in that: In the step (4), the mass ratio of the pretreated hollow glass beads, anhydrous ethanol, deionized water and hexylene glycol is 5-20:100-200:100-200:1-10.

9. The method for preparing an environmentally friendly antibacterial colored paint according to claim 6, characterized in that: In the step (5), the mass ratio of the self-made acrylic polymer emulsion, the modified hollow glass bead filler, the dye auxiliary, the defoamer, the thickener and the water is 30-50: 5-10: 0.2-0.8: 0.5-1: 0.5-1: 50-80.

10. The method for preparing an environmentally friendly antibacterial colored paint according to claim 6, characterized in that: In the step (5), the heating temperature is 30-60° C. and the stirring speed is 400-600 r / min.

Images