Liquid negative ions, water-based interior wall paint releasing negative ions and preparation method thereof

Abstract

The present invention provides a liquid negative ion, a water-based interior wall paint that releases negative ions, and a preparation method thereof, and specifically relates to the field of coating technology. The liquid negative ion comprises 5%-15% of a modified negative ion, 0.05%-1% of an auxiliary agent, and the balance is water, in percentage by mass; the modified negative ion has a core-shell structure; the inner layer is an encapsulated negative ion powder; the outer layer is a hydrophilic substance; and the auxiliary agent comprises a dispersant and / or an emulsifier. The liquid negative ion provided by the present invention is first encapsulated on the negative ion powder, and when used, the negative ions are slowly and uniformly released, and can release the negative ions basically uniformly within the service life; at the same time, the hydrophilic substance is coated on the outer layer to improve the water solubility and dispersibility of the negative ion powder, thereby obtaining a transparent liquid negative ion powder material, breaking the use restrictions of the negative ion powder, broadening the application places and application effects of the negative ion powder, and promoting the development of downstream industries.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, in particular to a liquid negative ion, a water-based interior wall coating that releases negative ions and a preparation method thereof. Background Art

[0002] Negative ion materials refer to tiny particles or substances with negative charges that can generate negative ions and release them into the surrounding environment. Negative ions are ions with negative charges, and their charge is usually 1 - Negative ion materials are widely used in air purification, health care, medical treatment and other fields. Their negative ion release characteristics make them an important functional material.

[0003] When applied to the field of coatings, negative ion materials can absorb harmful substances in the air, such as fine particulate matter and formaldehyde, purifying air quality and improving the indoor environment. However, existing negative ion powders have poor dispersibility, and the amount of negative ion release of existing negative ion materials under normal conditions is limited, making it difficult to achieve the above-mentioned effects. Furthermore, the use of a supporting negative ion extractor is required. Even with the use of a negative ion extractor, the amount of negative ions released is uncontrollable, and negative ions cannot be released uniformly throughout the service life, which affects the effectiveness of the negative ion use.

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

[0005] One of the purposes of the present invention is to provide a liquid negative ion, aiming to alleviate the technical problems in the prior art that the negative ion powder has poor dispersibility and increases the amount of emulsion used in coatings; and the negative ion powder release amount is uncontrollable and needs to be used with a negative ion extractor.

[0006] A second object of the present invention is to provide a water-based interior wall paint that releases negative ions.

[0007] A third object of the present invention is to provide a method for preparing a water-based interior wall paint that releases negative ions.

[0008] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are adopted:

[0009] The first aspect of the present invention provides a liquid negative ion comprising, by mass percentage, 5%-15% of a modified negative ion, 0.05%-1% of an auxiliary agent, and the balance being water;

[0010] The modified anion has a core-shell structure; the inner layer is the negative ion powder treated with the coating; the outer layer is the hydrophilic substance;

[0011] The auxiliary agent includes a dispersant and / or an emulsifier.

[0012] Furthermore, the vegetable oil is grafted onto the negative ion powder, and then acidified to obtain the coated negative ion powder;

[0013] Preferably, the acid used in the acidification treatment includes dilute sulfuric acid, dilute hydrochloric acid or dilute nitric acid;

[0014] Preferably, the acidification temperature is 70°C-90°C;

[0015] Preferably, the negative ion powder comprises tourmaline powder;

[0016] Preferably, the vegetable oil comprises at least one of lemon oil, turpentine oil, orange oil, clove oil and rose oil;

[0017] Preferably, the hydrophilic substance comprises at least one of starch, polyvinyl alcohol and cellulose derivatives.

[0018] The second aspect of the present invention provides a water-based interior wall paint that releases negative ions, comprising an emulsion, liquid negative ions, modified polysiloxane, fillers, additives and water;

[0019] The emulsion includes an acrylic emulsion.

[0020] Furthermore, a silane coupling agent γ-methacryloxypropyltrimethoxysilane and hydrogen-containing silicone oil are used as a catalyst in a chloroplatinic acid isopropanol complex solution, and a catalytic reaction is carried out at 70°C to 100°C for 12h to 24h, and then the modified polysiloxane is emulsified with AEO-9 and modified with ethylenediamine.

[0021] Furthermore, the composition comprises, by weight, 9 to 60 parts of emulsion, 0.3 to 1.0 parts of liquid negative ions, 0.5 to 1.5 parts of modified polysiloxane, 1.0 to 3.0 parts of filler, 0.1 to 0.3 parts of bentonite, 2.6 to 7.4 parts of additives and 15 to 35 parts of water.

[0022] Furthermore, the additives include, by weight, 0.5 to 1.5 parts of a dispersant, 0.1 to 0.3 parts of bentonite, 0.4 to 1.0 parts of a wetting agent, 0.1 to 0.3 parts of a pH regulator, 0.2 to 0.5 parts of a defoaming agent, 0.5 to 1.5 parts of a film-forming aid, 0.5 to 1.5 parts of a thickener, 0.3 to 0.8 parts of an antiseptic and antifungal agent, and 0.6 to 1.0 parts of a fungicide.

[0023] Furthermore, it also includes 0 to 20 parts of titanium dioxide in parts by weight.

[0024] Furthermore, the pH of the emulsion is 7.5 to 9.0, preferably 8.0 to 9.0.

[0025] Preferably, the viscosity of the emulsion is 100 mPa·s to 900 mPa·s.

[0026] Furthermore, the filler includes at least one of mica powder, talc powder, wollastonite, calcined kaolin, nepheline powder, barite powder and heavy calcium.

[0027] Furthermore, the dispersant includes a sodium salt dispersant and / or an ammonium salt dispersant.

[0028] Preferably, the wetting agent comprises an alkyl ether wetting agent.

[0029] Preferably, the pH adjuster comprises an organic alcohol amine pH adjuster and / or an inorganic pH adjuster.

[0030] Furthermore, the defoaming agent includes an organosilicon defoaming agent and / or a mineral oil defoaming agent.

[0031] Preferably, the film-forming aid includes an alcohol ester solvent.

[0032] Preferably, the thickener includes a HASE thickener and / or a polyurethane thickener.

[0033] The third aspect of the present invention provides a method for preparing the water-based interior wall paint, wherein all raw materials are uniformly mixed to obtain the water-based interior wall paint.

[0034] Compared with the prior art, the present invention has at least the following beneficial effects:

[0035] The liquid negative ion material provided by the present invention is first coated with negative ion powder. During use, negative ions are released slowly and evenly, ensuring a substantially uniform release of negative ions throughout the product's lifespan. Simultaneously, a hydrophilic material is coated on the outer layer to improve the water solubility and dispersibility of the negative ion powder, resulting in a modified negative ion powder material. The modified negative ion powder is then dissolved in water with an additive to produce a transparent liquid negative ion material. This liquid negative ion material overcomes the limitations of negative ion powder, broadens its application and effectiveness, and promotes the development of downstream industries.

[0036] The water-based interior wall paint for releasing negative ions provided by the present invention uses modified polysiloxane to enhance the hydrophilicity of its hydrophilic end, thereby enhancing the coating's ability to actively capture water molecules in the air and increasing the amount of negative ions released from the coating; the hydrophobic end is located inside the coating, thereby enhancing the adhesion between the coating and the substrate and making the combination denser. The use of liquid negative ions has better fusion with the coating system and can be fully integrated into the coating system without the problem of poor dispersion performance. The coating provided by the present invention can release safe and healthy ecological-grade negative ions for a long and lasting period, eliminate excess free radicals in the human body, enhance immunity, and delay aging; purify and deodorize, play a role in common odors in life, and can also neutralize cations released into the air by indoor electrical appliances; it has a killing effect on mold attached to various wall materials and has excellent performance.

[0037] The preparation method of the water-based interior wall paint provided by the present invention has continuous process, high degree of mechanization, large batch processing volume, and is suitable for large-scale industrial production. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention and comparative examples. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0039] Hereinafter, the terms "including", "having" and their cognates, which may be used in various embodiments of the present invention, are intended only to indicate specific features, numbers, steps, operations, elements, components or combinations of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or combinations of the foregoing items or the possibility of adding one or more features, numbers, steps, operations, elements, components or combinations of the foregoing items.

[0040] Furthermore, the terms “first,” “second,” “third,” etc., are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0041] The first aspect of the present invention provides a liquid negative ion comprising, by mass percentage, 5%-15% of a modified negative ion, 0.05%-1% of an auxiliary agent, and the balance being water;

[0042] The modified anion has a core-shell structure; the inner layer is the negative ion powder treated with the coating; the outer layer is the hydrophilic substance;

[0043] The auxiliary agent includes a dispersant and / or an emulsifier.

[0044] The liquid negative ion material provided by the present invention is first coated with negative ion powder. During use, negative ions are released slowly and evenly, ensuring a substantially uniform release of negative ions throughout the product's lifespan. Simultaneously, a hydrophilic material is coated on the outer layer to improve the water solubility and dispersibility of the negative ion powder, resulting in a modified negative ion powder material. The modified negative ion powder is then dissolved in water with an additive to produce a transparent liquid negative ion material. This liquid negative ion material overcomes the limitations of negative ion powder, broadens its application and effectiveness, and promotes the development of downstream industries.

[0045] Furthermore, the vegetable oil is grafted onto the negative ion powder, and then acidified to obtain the coated negative ion powder;

[0046] Preferably, the acid used in the acidification treatment includes dilute sulfuric acid, dilute hydrochloric acid or dilute nitric acid;

[0047] Preferably, the acidification temperature is 70°C-90°C;

[0048] Preferably, the negative ion powder comprises tourmaline powder;

[0049] Preferably, the vegetable oil comprises at least one of lemon oil, turpentine oil, orange oil, clove oil and rose oil;

[0050] Preferably, the hydrophilic substance comprises at least one of starch, polyvinyl alcohol and cellulose derivatives.

[0051] The second aspect of the present invention provides a water-based interior wall paint that releases negative ions, comprising an emulsion, liquid negative ions, modified polysiloxane, filler, bentonite, additives and water;

[0052] The emulsion includes an acrylic emulsion.

[0053] The water-based interior wall paint for releasing negative ions provided by the present invention uses modified polysiloxane to enhance the hydrophilicity of its hydrophilic end, thereby enhancing the coating's ability to actively capture water molecules in the air and increasing the amount of negative ions released in the coating; the hydrophobic end is located inside the coating, thereby enhancing the adhesion between the coating and the substrate and making the combination denser. The use of liquid negative ions has better fusion with the coating system and can be fully integrated into the coating system without the problem of poor dispersion performance. The amount of emulsion used is also relatively reduced, reducing the cost of the coating. The coating provided by the present invention can release safe and healthy ecological-grade negative ions for a long and lasting period, eliminate excess free radicals in the human body, enhance immunity, and delay aging; purify and deodorize, play a role in common odors in life, and can also neutralize cations released into the air by indoor electrical appliances; it has a killing effect on mold attached to various wall materials and has excellent performance.

[0054] It should be noted that the acrylate monomer used in the acrylic emulsion used in this application should be understood in a broad sense, including acrylic acid monomers and methacrylic acid monomers. At the same time, the acrylate monomer in the present invention can be a combination of one or more monomers.

[0055] Furthermore, the pH of the emulsion is 7.5 to 9.0, preferably 8.0 to 9.0. The present invention controls the pH of the emulsion within the alkaline range to better adapt to the alkalinity of the underlying wall.

[0056] Typically, but not limiting, the pH of the emulsion may be, for example, 7.5, 8.0, 8.5 or 9.0, or any value within the range of 7.5 to 9.0.

[0057] Preferably, the viscosity of the emulsion is 100 mPa·s to 900 mPa·s. It should be noted that the viscosity of the emulsion refers to the viscosity of the emulsion measured at 25°C ± 2°C.

[0058] Furthermore, a silane coupling agent γ-methacryloxypropyltrimethoxysilane and hydrogen-containing silicone oil are used as a catalyst in a chloroplatinic acid isopropanol complex solution, and a catalytic reaction is carried out at 70°C to 100°C for 12h to 24h, and then the modified polysiloxane is emulsified with AEO-9 and modified with ethylenediamine.

[0059] Furthermore, the invention comprises, by weight, 9 to 60 parts of emulsion, 0.3 to 1.0 parts of liquid negative ions, 0.5 to 1.5 parts of modified polysiloxane, 1.0 to 3.0 parts of filler, 2.6 to 7.4 parts of additives and 15 to 35 parts of water.

[0060] The weight parts of the emulsion can be, for example, 9 parts, 15 parts, 21 parts, 26 parts, 31 parts, 41 parts, 51 parts or 60 parts, or any value in the range of 9 parts to 60 parts; the weight parts of the liquid negative ion can be, for example, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts or 1 part, or any value in the range of 0.5 parts to 1 part; the weight parts of the modified polysiloxane can be, for example, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts or 1.5 parts. .5 parts, or any value within the range of 0.5 parts to 1.5 parts; the weight parts of the filler can be, for example, 1.0 parts, 1.5 parts, 2.0 parts, 2.5 parts or 3.0 parts, or any value within the range of 1.0 parts to 3.0 parts; the weight parts of bentonite can be, for example, 0.1 parts, 0.2 parts or 0.3 parts, or any value within the range of 0.1 parts to 0.3 parts; the weight parts of the additive can be, for example, 2.6 parts, 3.5 parts, 4.5 parts, 5.5 parts, 6.5 parts or 7.4 parts, or any value within the range of 2.6 parts to 7.4 parts.

[0061] When the amount of the liquid negative ions added is less than 0.5 parts, the amount of negative ions released is low; when the amount of the liquid negative ions added is more than 1.0 parts, the cost is high.

[0062] Furthermore, the weight proportion of the emulsion is preferably 9 to 20 parts, which reduces the cost while ensuring that the water-based interior wall paint has good performance.

[0063] Furthermore, the additives include, by weight, 0.5 to 1.5 parts of a dispersant, 0.1 to 0.3 parts of bentonite, 0.4 to 1.0 parts of a wetting agent, 0.1 to 0.3 parts of a pH regulator, 0.2 to 0.5 parts of a defoaming agent, 0.5 to 1.5 parts of a film-forming aid, 0.5 to 1.5 parts of a thickener, 0.3 to 0.8 parts of an antiseptic and antifungal agent, and 0.6 to 1.0 parts of a fungicide.

[0064] Furthermore, it also includes 0 to 20 parts of titanium dioxide in parts by weight.

[0065] Furthermore, the filler includes at least one of mica powder, talc powder, wollastonite, calcined kaolin, nepheline powder, barite powder and heavy calcium.

[0066] Furthermore, the dispersant includes a sodium salt dispersant and / or an ammonium salt dispersant.

[0067] Preferably, the wetting agent comprises an alkyl ether wetting agent.

[0068] Preferably, the pH adjuster comprises an organic alcohol amine pH adjuster and / or an inorganic pH adjuster.

[0069] Furthermore, the defoaming agent includes an organosilicon defoaming agent and / or a mineral oil defoaming agent.

[0070] Preferably, the film-forming aid includes an alcohol ester solvent.

[0071] Preferably, the thickener includes a HASE thickener and / or a polyurethane thickener.

[0072] The third aspect of the present invention provides a method for preparing the water-based interior wall paint, wherein all raw materials are uniformly mixed to obtain the water-based interior wall paint.

[0073] The preparation method of the water-based interior wall paint provided by the present invention has continuous process, high degree of mechanization, large batch processing volume, and is suitable for large-scale industrial production.

[0074] During the specific preparation process, fillers, bentonite, titanium dioxide and other powders need to be mixed at high speed, and at the same time, they are mixed with relevant additives such as dispersants, wetting agents and some defoaming agents; other liquid raw materials can be mixed evenly at low speed.

[0075] The present invention is further illustrated below by specific examples and comparative examples. However, it should be understood that these examples are merely for the purpose of further explanation and should not be construed as limiting the present invention in any form. The raw materials used in the examples and comparative examples of the present invention, unless otherwise specified, were prepared under conventional conditions or conditions recommended by the manufacturer. Reagents or instruments used without manufacturer's indication are all commercially available conventional products.

[0076] The modified polysiloxane used in the examples and comparative examples was prepared by using a silane coupling agent, γ-methacryloxypropyltrimethoxysilane (KH-570), and hydrogen-containing silicone oil in a chloroplatinic acid isopropanol complex solution as a catalyst, and performing a catalytic reaction at 70° C. to 100° C. for 12 h to 24 h, and then emulsifying with AEO-9 and modifying with ethylenediamine to obtain the modified polysiloxane.

[0077] Example 1

[0078] This embodiment provides a liquid negative ion, and the specific preparation process is as follows:

[0079] 1. Use tourmaline powder as negative ion powder, wrap 1 kg of tourmaline powder with 10 kg of lemon oil and mix evenly, then add dilute sulfuric acid for acidification at 80 ° C for 2 hours to obtain coated negative ion powder.

[0080] 2. Feed 1 kg of coated negative ion powder into the coating machine, and evenly coat 5 kg of starch and polyvinyl alcohol (mass ratio is 1:1) on the surface of the moving material, and obtain modified negative ions after cooling.

[0081] 3. Under stirring, add 9.5 kg of modified negative ions to 90 kg of water and stir at low speed. During the stirring process, add 0.5 kg of emulsifier polyoxyethylene ether and stir at high speed for 30 minutes. The solution becomes transparent and liquid negative ions are obtained.

[0082] Example 2

[0083] This embodiment provides a liquid negative ion, and the specific preparation process is as follows:

[0084] 1. Same as the step in Example 1.

[0085] 2. Same as the step in Example 1.

[0086] 3. Under stirring, add 15 kg of modified negative ions to 84 kg of water and stir at low speed. During the stirring process, add 1 kg of emulsifier polyoxyethylene ether and stir at high speed for 30 minutes. The solution becomes transparent and liquid negative ions are obtained.

[0087] Example 3

[0088] This embodiment provides a liquid negative ion, and the specific preparation process is as follows:

[0089] 1. Same as the step in Example 1.

[0090] 2. Same as the step in Example 1.

[0091] 3. Under stirring, add 5 kg of modified negative ions to 94.95 kg of water and stir at low speed. During the stirring process, add 0.05 kg of emulsifier polyoxyethylene ether and stir at high speed for 30 minutes. The solution becomes transparent and liquid negative ions are obtained.

[0092] Example 4

[0093] This embodiment provides a liquid negative ion. The difference from Example 1 is that turpentine is used instead of lemon oil. The remaining raw materials and methods are the same as those in Example 1 and will not be repeated here.

[0094] Example 5

[0095] This embodiment provides a liquid anion. The difference from Example 1 is that dispersant SN 5040 is added in step 3 to replace the emulsifier. The remaining raw materials and methods are the same as those in Example 1 and are not described again here.

[0096] Comparative Example 1

[0097] This comparative example provides a negative ion powder, the model is Tianzhiyan, and the brand is YS-6.

[0098] Comparative Example 2

[0099] This comparative example provides a liquid negative ion. The difference from Example 1 is that in step 3, 45 kg of modified negative ions are added to 50 kg of water and stirred at a low speed. During the stirring process, 5 kg of emulsifier polyoxyethylene ether is added. The remaining raw materials and methods are the same as those in Example 1 and are not repeated here.

[0100] Comparative Example 3

[0101] This comparative example provides a liquid negative ion. The difference from Example 1 is that in step 3, 1 kg of modified negative ions is added to 98.95 kg of water and stirred at a low speed. During the stirring process, 0.05 kg of emulsifier polyoxyethylene ether is added. The remaining raw materials and methods are the same as those in Example 1 and are not repeated here.

[0102] Test Example 1

[0103] The materials of Examples 1-5 and Comparative Examples 1-3 were subjected to performance tests to prepare coating samples. Examples 1-5 and Comparative Examples 2-3 were directly coated, while Comparative Example 1 used water to prepare a slurry (the mass ratio of negative ion powder to water was 1:9) to prepare a coating sample.

[0104] A paint sample was built into the shape of a small house with an observation port. The KEC900+II negative ion detector was placed in the center of the test house. The test button was pressed. The surrounding environment was kept as quiet and draft-free as possible. The test was left to stand until the data stabilized, and then the data was recorded. For the negative ion release function test, the negative ion induced amount was measured at 1 week, 1 month, 6 months, 12 months, and 18 months. The data obtained are shown in Table 1.

[0105] Table 1

[0106]

[0107]

[0108] As can be seen from Table 1, the negative ion solution has good persistence in releasing negative ions and weak attenuation; the higher the negative ion content in the negative ion solution, the higher the amount of negative ions released.

[0109] Example 6

[0110] This embodiment provides a water-based interior wall paint that releases negative ions. The specific preparation process is as follows:

[0111] 1. Add 30 kg of deionized water, 0.6 kg of dispersant (San Nopco, brand SN 5040), 0.4 kg of wetting agent (Clariant, brand LFH), 0.2 kg of bentonite, 0.2 kg of pH adjuster (DOW, brand AMP-95), 0.1 kg of defoaming agent (Mingling, brand AGITAN A208), 5 kg of rutile titanium dioxide (DuPont, brand R 902+), and 2 kg of talc into a stirring kettle and disperse them evenly at a high speed of 1200 rpm.

[0112] 2. In the stirred tank, 10 kg of emulsion (BASF, brand ECO-7080), 1.0 kg of film-forming aid (Chemoxy, brand Coasol 290plus), 0.8 kg of thickener (DOW, brand 2020), 0.5 kg of liquid negative ion (Example 1), 0.5 kg of modified polysiloxane, 0.5 kg of antiseptic and mildew inhibitor (THOR, brand OTW), 0.8 kg of bactericide (THOR, brand MBS5050) and 0.1 kg of remaining defoamer were added and stirred at 800 rpm to obtain a water-based interior wall coating that releases negative ions.

[0113] Example 7

[0114] This embodiment provides a water-based interior wall paint that releases negative ions. The difference from Example 6 is that mica powder is used instead of talcum powder, the amount of emulsion used is 9 kg, and the remaining raw materials and methods are the same as those in Example 6, which will not be repeated here.

[0115] Example 8

[0116] This embodiment provides a water-based interior wall paint that releases negative ions. The difference from Example 6 is that the amount of deionized water used is 25 kg; the amount of rutile titanium dioxide used is 10 kg; mica powder is used instead of talcum powder; the amount of emulsion used is 20 kg; the amount of modified polysiloxane used is 1.0 kg; the amount of film-forming aid used is 1.5 kg; the remaining raw materials and methods are the same as those in Example 6 and are not repeated here.

[0117] Example 9

[0118] This embodiment provides a water-based interior wall paint that releases negative ions. The difference from Example 6 is that the amount of deionized water used is 20 kg; the amount of dispersant used is 0.5 kg; the amount of wetting agent used is 0.3 kg; rutile titanium dioxide is not used; wollastonite is used instead of talc; the amount of emulsion used is 50 kg; the amount of modified polysiloxane used is 1.0 kg; the amount of film-forming aid used is 2.5 kg; the remaining raw materials and methods are the same as those in Example 6 and are not repeated here.

[0119] Example 10

[0120] This embodiment provides a water-based interior wall paint that releases negative ions. The difference from Example 6 is that the amount of deionized water used is 25 kg; the amount of rutile titanium dioxide used is 20 kg; wollastonite is used instead of talc; the amount of emulsion used is 30 kg; the amount of film-forming aid used is 2.0 kg; the remaining raw materials and methods are the same as those in Example 6 and are not repeated here.

[0121] Example 11

[0122] This embodiment provides a water-based interior wall paint that releases negative ions. The difference from Example 6 is that the amount of liquid negative ions used is 1 kg and the amount of modified polysiloxane used is 1.5 kg. The remaining raw materials and methods are the same as those in Example 6 and are not repeated here.

[0123] Comparative Example 4

[0124] This comparative example provides a water-based interior wall paint. Unlike Example 6, a negative ion powder material (Tianzhiyan, brand YS-6) is used instead of liquid negative ions. The remaining raw materials and methods are the same as those in Example 6 and are not repeated here.

[0125] Comparative Example 5

[0126] This comparative example provides a water-based interior wall paint. Unlike Example 6, no polysiloxane is added. The remaining raw materials and methods are the same as those in Example 6 and are not described in detail here.

[0127] Comparative Example 6

[0128] This comparative example provides a water-based interior wall paint. The difference from Example 6 is that the negative ion powder material of Comparative Example 1 is used instead of the liquid negative ion, and polysiloxane KH570 is used instead of the modified polysiloxane. The remaining raw materials and methods are the same as those in Example 6 and are not repeated here.

[0129] Comparative Example 7

[0130] This comparative example provides a water-based interior wall paint. The difference from Example 6 is that the liquid negative ions of Comparative Example 2 are used. The remaining raw materials and methods are the same as those of Example 6 and are not repeated here.

[0131] Comparative Example 8

[0132] This comparative example provides a water-based interior wall paint. The difference from Example 6 is that the liquid negative ions of Comparative Example 3 are used. The remaining raw materials and methods are the same as those of Example 6 and are not repeated here.

[0133] Test Example 2

[0134] Paint samples were prepared using the paints obtained in Examples 6-11 and Comparative Examples 4-8. These samples were then arranged in the shape of a small house with an observation port. A negative ion detector, KEC900+II, was placed in the center of the test house. The test button was pressed, and the surrounding environment was kept as quiet and windless as possible. The test was allowed to stand until the data stabilized, and the data was recorded. For the negative ion release function test, the negative ion induced amount was measured at 1 week, 1 month, 6 months, 12 months, and 18 months. The data obtained are shown in Table 2.

[0135] Table 2

[0136]

[0137] As can be seen from Table 2, the negative ion coating releases negative ions with good persistence and weak attenuation; the more negative ion solution is added, the more negative ions are released; the negative ion coating with modified polysiloxane and hydrophilic coating treatment can achieve good release with low addition of negative ion solution.

[0138] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed by the present invention, or replace some of the technical features therein with equivalents. Such modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A liquid negative ion, characterized in that: The invention comprises 5%-15% of modified negative ions, 0.05%-1% of additives and the balance of water, calculated by weight percentage; The modified anion has a core-shell structure; the inner layer is the negative ion powder treated with the coating; the outer layer is the hydrophilic substance; The auxiliary agent includes a dispersant and / or an emulsifier; Grafting vegetable oil onto negative ion powder, followed by acidification processing to obtain coated negative ion powder; The acid used in the acidification process includes dilute sulfuric acid, dilute hydrochloric acid or dilute nitric acid; The acidification temperature is 70℃-90℃ and the time is 1h-3h; The negative ion powder includes tourmaline powder; The vegetable oil comprises at least one of lemon oil, turpentine oil, orange oil, clove oil and rose oil; The hydrophilic substance includes at least one of starch, polyvinyl alcohol and cellulose derivatives.

2. A water-based interior wall paint that releases negative ions, characterized in that: Comprising an emulsion, modified polysiloxane, a filler, an additive, water and the liquid negative ion according to claim 1; The emulsion includes an acrylic emulsion; Using silane coupling agent γ-methacryloxypropyltrimethoxysilane and hydrogen-containing silicone oil, a chloroplatinic acid isopropanol complex solution is used as a catalyst, and a catalytic reaction is carried out at 70°C~100°C for 12h~24h, and then the modified polysiloxane is emulsified with AEO-9 and modified with ethylenediamine.

3. The water-based interior wall paint according to claim 2, characterized in that: The composition comprises, by weight, 9 to 60 parts of emulsion, 0.3 to 1.0 parts of liquid negative ions, 0.5 to 1.5 parts of modified polysiloxane, 1.0 to 3.0 parts of filler, 2.6 to 7.4 parts of additives, 15 to 35 parts of water, and 0 to 20 parts of titanium dioxide. The additives include, by weight, 0.5 to 1.5 parts of a dispersant, 0.1 to 0.3 parts of bentonite, 0.4 to 1.0 parts of a wetting agent, 0.1 to 0.3 parts of a pH regulator, 0.2 to 0.5 parts of a defoaming agent, 0.5 to 1.5 parts of a film-forming aid, 0.5 to 1.5 parts of a thickener, 0.3 to 0.8 parts of an antiseptic and antifungal agent, and 0.6 to 1.0 parts of a fungicide.

4. The water-based interior wall paint according to claim 2 or 3, characterized in that: The pH of the emulsion is 7.5 to 9.0; The viscosity of the emulsion is 100 mPa·s to 900 mPa·s.

5. The water-based interior wall paint according to claim 2 or 3, characterized in that: The filler includes at least one of mica powder, talc powder, wollastonite, calcined kaolin, nepheline powder, barite powder and heavy calcium.

6. The water-based interior wall paint according to claim 3, characterized in that: The dispersant includes a sodium salt dispersant and / or an ammonium salt dispersant; The wetting agent includes an alkyl ether wetting agent; The pH regulator includes an organic alcohol amine pH regulator and / or an inorganic pH regulator.

7. The water-based interior wall paint according to claim 3, characterized in that: The defoaming agent includes an organosilicon defoaming agent and / or a mineral oil defoaming agent; The film-forming aid includes an alcohol ester solvent; The thickener includes a HASE thickener and / or a polyurethane thickener.

8. A method for preparing a water-based interior wall paint according to any one of claims 2 to 7, characterized in that: All raw materials are mixed evenly to obtain the water-based interior wall paint.

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