Broad-spectrum high-efficiency antiviral coating composition and preparation method thereof

Abstract

According to the broad-spectrum high-efficiency antiviral coating composition and the preparation method thereof, through research on a metal ion type antiviral material, modified nano-cuprous oxide with relatively good compatibility with a water-based coating system is preferably selected, and the broad-spectrum high-efficiency antiviral coating composition is prepared by adding the optimized modified nano-cuprous oxide solution and improving a corresponding preparation process. The anti-virus efficiency of cuprous oxide in a coating system and the compatibility of cuprous oxide with the coating system are effectively improved, finally, the efficient anti-virus function of modified nano cuprous oxide is utilized to be fused with the anti-pollution, anti-formaldehyde and other functions of traditional functional coatings, and the coating which has the excellent anti-virus performance and the good anti-formaldehyde performance is obtained. And the water-based paint composition has multiple functions of resisting bacteria, resisting pollution, resisting formaldehyde and the like.

Description

Technical Field

[0001] This invention belongs to the field of coatings, specifically relating to a broad-spectrum, high-efficiency antiviral coating composition and its preparation method. Background Technology

[0002] In recent years, people have increasingly higher requirements for interior wall coatings. Decorative function is no longer the only standard for evaluating interior wall coatings. Consumers are paying more and more attention to the green, environmentally friendly, and multifunctional aspects of coatings.

[0003] With the increasing prevalence and widening impact of diseases caused by viruses and bacteria, people are paying unprecedented attention to products with antiviral functions. Viruses can spread in two ways: directly entering the human body via aerosols, or settling on surfaces after remaining suspended for a period of time. Therefore, developing a coating with automatic virus inactivation capabilities to effectively inactivate viruses adhering to the coating surface and help prevent the spread of viruses and diseases is becoming increasingly important and urgent.

[0004] Currently, most antiviral functional materials used in coatings are metal ion-based, with silver ion antiviral materials being the most common. However, silver is a precious metal, resulting in consistently high costs for silver ion antiviral materials. Furthermore, to ensure excellent antiviral performance, the amount of antiviral material added to the coating system needs to be controlled at a high level, making silver ion antiviral coatings prohibitively expensive and limiting the development of the antiviral coating market. Grafting materials, including zinc ion, iron ion, and copper ion materials, are also common antiviral materials. However, when applied to coating systems, they are prone to problems such as difficulty in dispersion, poor stability, and discoloration.

[0005] Therefore, based on market development trends and consumer needs, there is an urgent need in this field to develop a coating product that has excellent environmental performance, while also possessing multiple functions such as antibacterial, antiviral, antifouling, and formaldehyde resistance, and is cost-effective. Summary of the Invention

[0006] The technical problem this invention aims to solve is the common problems encountered by conventional metal ion-based antiviral materials during application, such as insufficient antiviral efficiency, high cost, poor dispersibility, and poor stability. This invention provides a broad-spectrum, high-efficiency antiviral coating composition and its preparation method. By utilizing the highly efficient antiviral function of modified nano-cuprous oxide, and optimizing the formulation of the modified nano-cuprous oxide solution, the antiviral effect and compatibility of modified nano-cuprous oxide in the coating system are improved. Simultaneously, it integrates with the anti-fouling and anti-formaldehyde functions of traditional functional coatings, developing a green and environmentally friendly water-based interior wall coating composition suitable for high-end areas such as children's rooms and hospitals. This antiviral coating composition not only has highly efficient antiviral function but also excellent anti-formaldehyde, anti-fouling, and antibacterial functions. Furthermore, the product is characterized by ultra-low odor and green safety, meeting diverse consumer needs.

[0007] To solve the above problems, the present invention is achieved through the following technical solution:

[0008] The first objective of this invention is:

[0009] A broad-spectrum, high-efficiency antiviral coating composition is provided, comprising the following components in parts by weight:

[0010] The composition comprises 10-40 parts film-forming substance, 0.1-2.5 parts modified nano cuprous oxide solution, 0.1-1 parts pH adjuster, 0.1-1 parts bentonite, 0.1-1 parts wax emulsion, 0.1-2 parts dispersant, 0.1-1 parts wetting agent, 20-40 parts pigments and fillers, 5-15 parts other additives, and 10-30 parts deionized water. The pH value of the antiviral coating composition is controlled within the range of 8-10, preferably 8.3-9.7, and more preferably 8.5-9.5.

[0011] The modified nano-cuprous oxide solution described herein comprises the following components in parts by weight:

[0012] 2-8 parts organic amine solution, 20-40 parts modified nano cuprous oxide, 40-60 parts deionized water;

[0013] The modified nano-cuprous oxide solution is further optimized as follows:

[0014] The weight ratio of modified nano-cuprous oxide to organic amine solution is 6–10, preferably 6.5–9.5;

[0015] The modified nano-cuprous oxide is a red powder, the active material is cuprous oxide, and it is modified by a special carrier silicate (by bissilicate modification). The powder particle size is between 2 and 4 μm, and it has good stability in air and aqueous solution.

[0016] The modified nano-cuprous oxide is a red powder, preferably Corning Guardiant copper ion powder from Corning Incorporated, in which the cuprous oxide is coated with bissilicate.

[0017] The other additives mentioned herein include the following components in parts by weight:

[0018] 0.1 to 2 parts cellulose ether thickener

[0019] 0.1 to 5 parts of defoamer;

[0020] 0.1 to 2 parts of PU thickener

[0021] 0.01 to 4 parts of antifungal agent;

[0022] 0.01 to 4 parts of preservative.

[0023] Further optimization of the broad-spectrum, high-efficiency antiviral coating composition of the present invention is as follows:

[0024] The organic amine solution has a weight percentage concentration of 90% to 100%, preferably 99% to 100%; and / or

[0025] The organic amine solution is an alkylolamide solution.

[0026] Further optimization of the broad-spectrum, high-efficiency antiviral coating composition of the present invention is as follows:

[0027] The thickener is selected from cellulose ether thickeners, PU thickeners, or combinations thereof;

[0028] The thickener is preferably a combination of modified cellulose ether and PU thickener, which can better adjust the viscosity of the coating to ensure that the coating has excellent leveling properties and storage stability.

[0029] Further optimization of the broad-spectrum, high-efficiency antiviral coating composition of the present invention is as follows:

[0030] The defoamer is a combination of silicone-based and mineral oil-based defoamers to ensure rapid and long-lasting defoaming stability. The preferred ratio of the two types of defoamers is 1:1 or 1.5:1.0.

[0031] Further optimization of the broad-spectrum, high-efficiency antiviral coating composition of the present invention is as follows:

[0032] The preservatives and fungicides mentioned are all selected from commercially available products. The preferred preservatives and fungicides will not introduce harmful substances such as VOCs, formaldehyde, and heavy metals during application, and the effective ingredients and dosage control meet the standard requirements for green label products. The preservatives protect the system from bacterial erosion, and the fungicides protect the paint film from enzyme and bacterial erosion.

[0033] Further optimization of the broad-spectrum, high-efficiency antiviral coating composition of the present invention is as follows:

[0034] The film-forming substance is a styrene-acrylic emulsion containing special groups;

[0035] The special groups mentioned include one or more of the following groups: amino, carboxyl, hydroxyl, ethylene siloxy, etc.

[0036] Further optimization of the broad-spectrum, high-efficiency antiviral coating composition of the present invention is as follows:

[0037] The styrene-acrylic emulsion has a glass transition temperature (Tg) in the range of 5–20°C and a pH value in the range of 7–10, preferably 7.3–9.7, and more preferably 7.5–9.5.

[0038] The styrene-acrylic emulsion described in this invention preferably uses Dow Chemical's SF-508 emulsion, with a Tg between 5 and 10°C and a pH value between 8 and 9. It is a multifunctional styrene-acrylic emulsion developed based on a new ultra-low odor platform, and has ultra-low odor, ultra-low VOC, excellent stain resistance, and efficient formaldehyde removal ability.

[0039] Further optimization of the broad-spectrum, high-efficiency antiviral coating composition of the present invention is as follows:

[0040] The modified nano-cuprous oxide solution has a pH range of 12–14, preferably 12.3–13.7, and more preferably 12.5–13.5.

[0041] Further optimization of the broad-spectrum, high-efficiency antiviral coating composition of the present invention is as follows:

[0042] The pH adjuster is selected from one or a combination of organic amines, potassium methylsilicate, sodium hydroxide, and sodium benzenesulfonate.

[0043] Further optimization of the broad-spectrum, high-efficiency antiviral coating composition of the present invention is as follows:

[0044] The dispersant is selected from one or a combination of sodium salts, carboxylates, phosphates, and acrylates;

[0045] The dispersant is preferably one or a combination of SN-DISPERSANT 5040 from S.N.P. Ltd., P90 from COATEX, ADS1288 from DOW, and AD-7300A.

[0046] Further optimization of the broad-spectrum, high-efficiency antiviral coating composition of the present invention is as follows:

[0047] The wetting agent is a nonionic surfactant, selected from one or a combination of ether-type and phenolic ether-type surfactants; the wetting agent can improve the dispersion and wetting efficiency of pigments and fillers, and stabilize the pigments and fillers in the system.

[0048] The wetting agent is preferably one or a combination of NOPCO's SN-WET 996, CLARIANT's PF 20 and W412, and ASHLAND's FT-68.

[0049] Further optimization of the broad-spectrum, high-efficiency antiviral coating composition of the present invention is as follows:

[0050] The pigment in the pigment filler is rutile titanium dioxide;

[0051] The fillers in the pigments and fillers are selected from one or a combination of calcined kaolin, heavy calcium carbonate, mica powder, talc powder, diatomaceous earth, and wollastonite.

[0052] The filler is selected with high hardness, low polarity and inertness as the main powder material, such as wollastonite and silica gel. Other powder materials are selected and combined according to the formula requirements. The specific raw materials are commercially available products.

[0053] The pigments and fillers can provide hiding power, enhance the hardness and density of the paint film, etc.

[0054] Further optimization of the broad-spectrum, high-efficiency antiviral coating composition of the present invention is as follows:

[0055] The bentonite mentioned is selected from commonly used raw materials such as montmorillonite, and preferably from Deqian Company. DY CE can be dispersed in aqueous media as a gel or suspension, which is beneficial for improving the storage stability of coating systems.

[0056] Further optimization of the broad-spectrum, high-efficiency antiviral coating composition of the present invention is as follows:

[0057] The preferred wax emulsion is BYK-AQUACER 531 from BYK Corporation, which is an aqueous micro-fine oxidized polyethylene wax emulsion that improves the hydrophobic effect of the paint film.

[0058] The second objective of this invention is:

[0059] A method for preparing the aforementioned broad-spectrum, high-efficiency antiviral coating composition is provided, comprising the following preparation steps:

[0060] i) Preparation of modified nano-cuprous oxide solution:

[0061] The modified nano-cuprous oxide solution comprises the following components in parts by weight:

[0062] 2-8 parts organic amine solution, 20-40 parts modified nano cuprous oxide, 40-60 parts deionized water;

[0063] Further optimization of the modified nano-cuprous oxide solution is as follows:

[0064] The weight ratio of modified nano-cuprous oxide to organic amine solution is 6–10, preferably 6.5–9.5;

[0065] The modified nano-cuprous oxide solution has a pH range of 12–14, preferably 12.3–13.7, and more preferably 12.5–13.5.

[0066] The modified nano-cuprous oxide solution comprises the following preparation steps:

[0067] a. Add deionized water to the reaction vessel in proportion, and control the speed of the disperser at 300-500 rpm;

[0068] b. Then add the organic amine solution and modified nano-cuprous oxide in sequence, and continue to disperse for 8-10 minutes;

[0069] c. Seal and store the obtained mixture, let it stand for 30 to 120 minutes, preferably 40 to 100 minutes, and even more preferably 50 to 80 minutes;

[0070] ii) Preparation of broad-spectrum, high-efficiency antiviral coating compositions:

[0071] The aforementioned broad-spectrum, high-efficiency antiviral coating composition comprises the following components in parts by weight:

[0072] 10–40 parts film-forming substance, 0.1–2.5 parts modified nano cuprous oxide solution, 0.1–1 part pH adjuster, 0.1–1 part bentonite, 0.1–1 part wax emulsion, 0.1–2 parts dispersant, 0.1–1 part wetting agent, 20–40 parts pigments and fillers, 5–15 parts other additives, 10–30 parts deionized water;

[0073] The other additives mentioned herein include the following components in parts by weight:

[0074] 0.1 to 2 parts cellulose ether thickener

[0075] 0.1 to 5 parts of defoamer;

[0076] 0.1 to 2 parts of PU thickener

[0077] 0.01 to 4 parts of antifungal agent;

[0078] 0.01 to 4 parts preservative;

[0079] The antiviral coating composition comprises the following preparation steps:

[0080] a. Add some deionized water to the reaction vessel and control the speed of the disperser at 500-700 rpm;

[0081] b. Add cellulose-based thickener, bentonite, pH adjuster, dispersant, wetting agent, some defoamer, pigments and fillers in sequence, and continue to disperse for 5 to 10 minutes;

[0082] c. Under stirring conditions, the modified nano-cuprous oxide solution that has been allowed to stand in step i is mixed with the mixture prepared in step b in proportion, and the speed of the disperser is controlled at 1000-1500 rpm for 10-20 minutes. Then the speed is reduced to 500-700 rpm, and the film-forming substance, the remaining defoamer, the PU thickener, the preservative, the mildew inhibitor and the wax emulsion are added in sequence. Finally, the remaining deionized water is added to adjust to the required viscosity to obtain the broad-spectrum and high-efficiency antiviral coating composition. The pH value of the obtained antiviral coating composition should be controlled in the range of 8-10, preferably 8.3-9.7, and more preferably 8.5-9.5.

[0083] Through in-depth research on metal ion-based antiviral materials, the inventors selected modified nano-cuprous oxide with good compatibility with water-based coating systems. By adding an optimized modified nano-cuprous oxide solution and improving the corresponding preparation process, the inventors effectively improved the antiviral efficiency of cuprous oxide in the coating system and addressed compatibility issues. Ultimately, by utilizing the highly efficient antiviral function of modified nano-cuprous oxide and combining it with the antifouling and antiformaldehyde functions of traditional functional coatings, an excellent antiviral performance water-based coating composition with multiple functions such as antibacterial, antifouling, and antiformaldehyde properties was obtained.

[0084] Specifically, firstly, an acceptable amount of modified nano-cuprous oxide powder is mixed with an appropriate amount of organic amine solution and deionized water to form a mixed solution. This pretreatment allows the modified nano-cuprous oxide to form a copper-amine complex with the organic amine, effectively improving the compatibility between the modified nano-cuprous oxide and the coating system. Furthermore, the copper-amine complex can slow down the oxidation rate of cuprous oxide in the coating system, enhancing the antiviral efficiency of the modified nano-cuprous oxide. In addition, during the standing process, the modified nano-cuprous oxide solution allows some highly active cuprous oxide that is not well coated with silicates to be oxidized prematurely, thus avoiding discoloration of the coating. Secondly, in the coating formulation, the optimized wetting and dispersing system, thickening system, and anti-settling agent ensure good compatibility with the modified nano-cuprous oxide, ensuring that the coating system does not exhibit abnormal phenomena such as stratification or floating color during long-term storage. Thirdly, the optimized styrene-acrylic emulsion, incorporating special functional groups, possesses anti-fouling and anti-formaldehyde effects. Based on the above optimizations, this invention has finally developed a water-based coating composition with excellent antiviral properties, as well as antibacterial, antifouling, and formaldehyde-resistant properties.

[0085] The antiviral coating composition and its preparation method of the present invention have the following characteristics and advantages:

[0086] 1. In the application of antiviral modified nano-cuprous oxide, an appropriate amount of organic amine solution and deionized water were used to prepare a mixed solution beforehand. The organic amine can form a copper amine complex with cuprous oxide, which can effectively improve the dispersibility and compatibility of cuprous oxide in the coating system. This effectively improves the problems of difficult dispersion and poor stability of conventional antiviral materials in the system, and avoids abnormal phenomena such as layering and floating color in the coating.

[0087] 2. Appropriate amounts of organic amines can form copper-amine complexes with cuprous oxide, preventing excessive oxidation of cuprous oxide during application and thus avoiding a decrease in antiviral efficiency. Adding modified nano-cuprous oxide in a mixed solution ensures high antiviral efficiency even at low concentrations, effectively saving costs and enhancing product competitiveness.

[0088] 3. During application, the modified nano cuprous oxide solution will be left to stand under sealed conditions for a period of time. This allows some of the highly active cuprous oxide that is not well coated with silicates to be oxidized in advance, thereby avoiding serious discoloration of the coating.

[0089] 4. When the film-forming substance is preferably a multifunctional styrene-acrylic emulsion, it possesses ultra-low odor, ultra-low VOC, excellent stain resistance, and highly efficient formaldehyde removal capabilities. The film-forming substance, through its organic combination with the antiviral capabilities of modified nano-cuprous oxide, ultimately develops the coating composition described in this invention. The product prepared by this invention simultaneously possesses multiple functions, including Class I antiviral, Class I antibacterial, Class I stain resistance, and excellent formaldehyde resistance. The selected raw materials will not introduce harmful substances such as VOCs, heavy metals, and formaldehyde during application. The resulting antiviral coating composition can pass green product certification, French A+ certification, and German TUV certification.

[0090] 5. The antiviral coating composition of the present invention belongs to the category of multifunctional antiviral coating products. Its development helps to improve the quality of interior wall coating products and opens up new application areas. The combination of high environmental protection requirements and high-quality functional features enables this product to better serve the interior decoration market. Detailed Implementation

[0091] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Any simple improvements to the preparation method of this invention based on the inventive concept are within the scope of protection of this invention.

[0092] The product performance of this invention is tested according to the following standards:

[0093] The water resistance, alkali resistance, adhesion, scrub resistance, gloss, and other properties of the product of this invention were tested according to GB / T9756-2018, and all indicators meet the requirements for superior grade products in the standard. The antiviral performance meets the requirements of the Class I antiviral index in the group standard T / CNCIA 01014-2020, and the antibacterial, stain-resistant, and formaldehyde-resistant properties were also tested in accordance with national standards.

[0094] All hazardous substances in the products of this invention meet the limits specified in GB18582-2020 and the environmental protection requirements of JG / T 481-2015 for low volatile organic compound water-based interior wall coating materials.

[0095] Example 1: A method for preparing a broad-spectrum, high-efficiency antiviral coating composition

[0096] A method for preparing a broad-spectrum, highly effective antiviral coating composition, comprising the following preparation steps:

[0097] i) Preparation of modified nano-cuprous oxide solution:

[0098] The modified nano-cuprous oxide solution comprises the following preparation steps:

[0099] a. Add 55 parts of deionized water to the reaction vessel and control the speed of the disperser at 300-500 rpm;

[0100] b. Then add 5 parts of organic amine solution and 40 parts of modified nano cuprous oxide in sequence, and continue to disperse for 8±1 minutes;

[0101] c. Seal the resulting mixture and let it stand for 60 minutes;

[0102] ii) Preparation of broad-spectrum, high-efficiency antiviral coating compositions:

[0103] The broad-spectrum, high-efficiency antiviral coating composition comprises the following preparation steps:

[0104] a. Add some deionized water to the reaction vessel and control the speed of the disperser at 500-700 rpm;

[0105] b. Add cellulose-based thickener, bentonite, pH adjuster, dispersant, wetting agent, some defoamer, pigments and fillers in sequence, and continue to disperse for 8±1 minutes;

[0106] c. Under stirring conditions, 2.5 parts of the modified nano-cuprous oxide solution that has been allowed to stand are mixed with the mixture prepared in step b above in proportion, and the speed of the disperser is controlled at 1200-1500 rpm, and high-speed dispersion is continued for 15±1 minutes; then the speed is reduced to 500-700 rpm, and film-forming substances, remaining defoamer, PU thickener, preservative, mildew inhibitor and wax emulsion are added in sequence, and finally the remaining deionized water is added to adjust to the required viscosity, and dispersed for 10±1 minutes to obtain the broad-spectrum and high-efficiency antiviral coating composition.

[0107] Comparative Example 1

[0108] The difference between Comparative Example 1 and Example 1 is that the modified nano-cuprous oxide solution contains 50 parts of deionized water and 10 parts of organic amine solution, while the amount of other raw materials added and their preparation process are the same as in Example 1.

[0109] Comparative Example 2

[0110] The difference between Comparative Example 2 and Example 1 is that: ammonia solution is used instead of organic amine solution, and the amount of raw materials added and the preparation process are the same as in Example 1.

[0111] Comparative Example 3

[0112] The difference between Comparative Example 3 and Example 1 is that a polyamide solution is used instead of an organic amine solution, while the amount of raw materials added and the preparation process are the same as in Example 1.

[0113] Comparative Example 4

[0114] The difference between Comparative Example 4 and Example 1 is that the modified nano-cuprous oxide solution was added during the mixing stage and was not fully ground under high-speed stirring.

[0115] A method for preparing a coating composition, comprising the following preparation steps:

[0116] i) Preparation of modified nano-cuprous oxide solution:

[0117] The modified nano-cuprous oxide solution comprises the following preparation steps:

[0118] a. Add 55 parts of deionized water to the reaction vessel and control the speed of the disperser at 300-500 rpm;

[0119] b. Then add 5 parts of organic amine solution and 40 parts of modified nano cuprous oxide in sequence, and continue to disperse for 8±1 minutes;

[0120] c. Seal the resulting mixture and let it stand for 60 minutes;

[0121] ii) Preparation of coating composition:

[0122] The coating composition comprises the following preparation steps:

[0123] a. Add some deionized water to the reaction vessel and control the speed of the disperser at 500-700 rpm;

[0124] b. Add cellulose thickener, bentonite, pH adjuster, dispersant, wetting agent, some defoamer, pigments and fillers in sequence, and increase the speed to 1200-1500 rpm, and continue high-speed dispersion for 15±1 minutes;

[0125] c. Reduce the rotation speed to 500-700 rpm, mix 2.5 parts of the modified nano-cuprous oxide solution that has been allowed to stand with the mixture prepared in step b above in proportion, then add the film-forming substance, the remaining defoamer, PU thickener, preservative, mildew inhibitor and wax emulsion in sequence, and finally add the remaining deionized water to adjust to the required viscosity, disperse for 10±1 minutes to obtain the coating composition.

[0126] Comparative Example 5

[0127] The difference between Comparative Example 5 and Example 1 is that the modified nano-cuprous oxide was not pretreated and was added directly during the high-speed grinding stage.

[0128] A method for preparing a coating composition, comprising the following preparation steps:

[0129] a. Add some deionized water to the reaction vessel and control the speed of the disperser at 500-700 rpm;

[0130] b. Add cellulose thickener, bentonite, pH adjuster, dispersant, wetting agent, part of defoamer, pigments and fillers, and 1 part of modified nano cuprous oxide in sequence, and increase the speed to 1200-1500 rpm, and continue high-speed dispersion for 15±1 minutes;

[0131] c. Reduce the rotation speed to 500-700 rpm, and add the film-forming substance, remaining defoamer, PU thickener, preservative, mildew inhibitor and wax emulsion in sequence. Finally, add the remaining deionized water to adjust to the required viscosity, and disperse for 10±1 minutes to obtain the coating composition.

[0132] Comparative Example 6

[0133] The difference between Comparative Example 6 and Example 1 is that no modified nano-cuprous oxide was added.

[0134] A method for preparing a coating composition, comprising the following preparation steps:

[0135] a. Add some deionized water to the reaction vessel and control the speed of the disperser at 500-700 rpm;

[0136] b. Add cellulose thickener, bentonite, pH adjuster, dispersant, wetting agent, some defoamer, pigments and fillers in sequence, and increase the speed to 1200-1500 rpm, and continue high-speed dispersion for 15±1 minutes;

[0137] c. Reduce the rotation speed to 500-700 rpm, and add the film-forming substance, remaining defoamer, PU thickener, preservative, mildew inhibitor and wax emulsion in sequence. Finally, add the remaining deionized water to adjust to the required viscosity, and disperse for 10±1 minutes to obtain the coating composition.

[0138] The weight composition of each component of the modified nano-cuprous oxide solution in Example 1 and Comparative Examples 1-6 is detailed in Table 1.

[0139] Table 1:

[0140] project Deionized water Organic amine solution ammonia solution Polyamide solution Modified nano cuprous oxide Example 1 55 5 / / 40 Comparative Example 1 50 10 / / 40 Comparative Example 2 55 / 5 / 40 Comparative Example 3 55 / / 5 40 Comparative Example 4 55 5 / / 40

[0141] The weight proportions of each component in the coating compositions of Example 1 and Comparative Examples 1-6 are detailed in Table 2:

[0142] Table 2:

[0143]

[0144]

[0145] The product underwent relevant performance tests according to the corresponding test methods specified in the national standards. The test results are detailed in Table 3.

[0146] Table 3:

[0147]

[0148]

[0149] As shown in Table 1, the difference between Example 1 and Comparative Example 1 lies in the amount of organic amine used. The difference between Example 1 and Comparative Examples 2-3 lies in the raw materials used to prepare the modified nano-cuprous oxide solution: ammonia and polyamide solution, respectively. Combining the test results in Table 3, it can be seen that excessive amounts of organic amine negatively impact the stability of the modified nano-cuprous oxide and its compatibility with the coating system. Furthermore, using ammonia or polyamide does not produce complexes with the modified nano-cuprous oxide, or only produces small amounts of complexes, thus failing to effectively improve the compatibility of the modified nano-cuprous oxide with the coating system and its own stability.

[0150] As shown in Table 2, the amount of modified nano-cuprous oxide added in Example 1 and Comparative Examples 4-6 is similar. The difference is that the modified nano-cuprous oxide in Example 1 was pretreated and added during the grinding stage; the modified nano-cuprous oxide in Comparative Example 4 was also pretreated, but it was not subjected to high-speed grinding; the modified nano-cuprous oxide in Comparative Example 5 was not pretreated and was added directly during the grinding stage; and no modified nano-cuprous oxide was added in Comparative Example 6.

[0151] As shown in Table 3, Comparative Examples 4 and 5 exhibited significant stratification and discoloration during storage, indicating that their compatibility and stability were significantly worse than those of Example 1. Comparative Example 6, without the addition of modified nano-cuprous oxide, had no impact on the basic performance of the product and possessed better anti-fouling, anti-formaldehyde, and antibacterial functions, but lacked antiviral properties.

[0152] As shown in Table 3, when the modified nano-cuprous oxide is added in the same amount, the antiviral efficiency of the comparative example is significantly worse than that of Example 1.

[0153] In summary, pretreatment of modified nano-cuprous oxide can not only significantly improve the stability of modified nano-cuprous oxide in coating systems, but also achieve good antiviral function at a low addition amount, which is conducive to the development of more economical antiviral products.

[0154] In summary, the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any changes, modifications, and evolutions made by those skilled in the art without departing from the scope of the present invention based on the disclosed technical content shall be considered equivalent embodiments of the present invention. Furthermore, any changes, modifications, and evolutions made to the above embodiments based on the essential technology of the present invention shall still fall within the protection scope of the present invention.

[0155] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0156] Experimental methods not specified in this invention are generally performed under conventional conditions or as recommended by the manufacturer.

[0157] Unless otherwise stated, the various optimized technical solutions in this invention can be combined with each other.

[0158] Unless otherwise stated, percentages and parts are weight percentages and weight parts.

[0159] Experimental methods not specified in the instructions and examples are generally performed under standard conditions or as recommended by the manufacturer.

[0160] The various raw materials, reagents and components used in this invention are all commonly used raw materials in the field unless otherwise stated.

[0161] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as are familiar to those skilled in the art. Furthermore, any methods and materials similar to or equivalent to those described herein may be used in the methods of this invention.

Claims

1. A broad-spectrum, highly effective antiviral coating composition, characterized in that: The antiviral coating composition comprises the following components in parts by weight: The composition comprises 10-40 parts film-forming substance, 0.1-2.5 parts modified nano cuprous oxide solution, 0.1-1 parts pH adjuster, 0.1-1 parts bentonite, 0.1-1 parts wax emulsion, 0.1-2 parts dispersant, 0.1-1 parts wetting agent, 20-40 parts pigments and fillers, 5-15 parts other additives, and 10-30 parts deionized water, wherein the pH value of the antiviral coating composition is controlled within the range of 8-10. The modified nano-cuprous oxide solution described herein comprises the following components in parts by weight: 2-8 parts organic amine solution, 20-40 parts modified nano cuprous oxide, 40-60 parts deionized water; The other additives mentioned herein include the following components in parts by weight: 0.1 to 2 parts cellulose ether thickener 0.1 to 5 parts of defoamer; 0.1 to 2 parts of PU thickener 0.01 to 4 parts of antifungal agent; 0.01 to 4 parts of preservative.

2. The broad-spectrum, high-efficiency antiviral coating composition according to claim 1, characterized in that: The organic amine solution has a weight percentage concentration of 90% to 100%; and / or The organic amine solution is an alkylolamide solution.

3. The broad-spectrum, high-efficiency antiviral coating composition according to claim 1, characterized in that: The film-forming substance is a styrene-acrylic emulsion containing special groups; The special groups mentioned include one or more of the following groups: amino, carboxyl, hydroxyl, ethylene siloxy, etc.

4. The broad-spectrum, high-efficiency antiviral coating composition according to claim 3, characterized in that: The styrene-acrylic emulsion has a glass transition temperature (Tg) ranging from 5 to 20°C and a pH value ranging from 7 to 10.

5. The broad-spectrum, high-efficiency antiviral coating composition according to claim 1, characterized in that: The pH range of the modified nano-cuprous oxide solution is 12–14.

6. The broad-spectrum, high-efficiency antiviral coating composition according to claim 1, characterized in that: The pH adjuster is selected from one or a combination of organic amines, potassium methylsilicate, sodium hydroxide, and sodium benzenesulfonate.

7. The broad-spectrum, high-efficiency antiviral coating composition according to claim 1, characterized in that: The dispersant is selected from one or a combination of sodium salts, carboxylates, phosphates, and acrylates.

8. The broad-spectrum, high-efficiency antiviral coating composition according to claim 1, characterized in that: The wetting agent is a nonionic surfactant, selected from one or a combination of ether-type, phenolic ether-type, and other types.

9. The broad-spectrum, high-efficiency antiviral coating composition according to claim 1, characterized in that: The pigment in the pigment filler is rutile titanium dioxide; The fillers in the pigments and fillers are selected from one or a combination of calcined kaolin, heavy calcium carbonate, mica powder, talc powder, diatomaceous earth, and wollastonite.

10. The method for preparing the broad-spectrum, high-efficiency antiviral coating composition according to claim 1, characterized in that: It includes the following preparation steps: i) Preparation of modified nano-cuprous oxide solution: The modified nano-cuprous oxide solution comprises the following components in parts by weight: 2-8 parts organic amine solution, 20-40 parts modified nano cuprous oxide, 40-60 parts deionized water; The modified nano-cuprous oxide solution comprises the following preparation steps: a. Add deionized water to the reaction vessel in proportion, and control the speed of the disperser at 300-500 rpm; b. Then add the organic amine solution and modified nano-cuprous oxide in sequence, and continue to disperse for 8-10 minutes; c. Seal the resulting mixture and let it stand for 30 to 120 minutes; ii) Preparation of broad-spectrum, high-efficiency antiviral coating compositions: The aforementioned broad-spectrum, high-efficiency antiviral coating composition comprises the following components in parts by weight: The composition comprises 10-40 parts film-forming substance, 0.1-2.5 parts modified nano cuprous oxide solution, 0.1-1 parts pH adjuster, 0.1-1 parts bentonite, 0.1-1 parts wax emulsion, 0.1-2 parts dispersant, 0.1-1 parts wetting agent, 20-40 parts pigments and fillers, 5-15 parts other additives, and 10-30 parts deionized water, wherein the pH value of the broad-spectrum and high-efficiency antiviral coating composition is controlled within the range of 8-10. The other additives mentioned herein include the following components in parts by weight: 0.1 to 2 parts cellulose ether thickener 0.1 to 5 parts of defoamer; 0.1 to 2 parts of PU thickener 0.01 to 4 parts of antifungal agent; 0.01 to 4 parts preservative; The antiviral coating composition comprises the following preparation steps: a. Add some deionized water to the reaction vessel and control the speed of the disperser at 500-700 rpm; b. Add cellulose ether thickener, bentonite, pH adjuster, dispersant, wetting agent, some defoamer, pigments and fillers in sequence, and continue to disperse for 5 to 10 minutes; c. Under stirring conditions, the modified nano-cuprous oxide solution that has been allowed to stand in step i is mixed with the mixture prepared in step b in proportion, and the speed of the disperser is controlled at 1000-1500 rpm for 10-20 minutes. Then the speed is reduced to 500-700 rpm, and the film-forming substance, the remaining defoamer, the PU thickener, the preservative, the mildew inhibitor and the wax emulsion are added in sequence. Finally, the remaining deionized water is added to adjust to the required viscosity to obtain the broad-spectrum and high-efficiency antiviral coating composition.

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