A negative oxygen ion-releasable interior wall latex paint and a preparation method thereof

Abstract

The application discloses an interior wall latex paint capable of releasing negative oxygen ions and a preparation method thereof. The interior wall latex paint comprises the following raw material components in mass fractions: 30-50 parts of water-based acrylic emulsion, 20-30 parts of titanium white, 5-10 parts of tourmaline powder, 1-3 parts of conductive polymer, 1-2 parts of nano activated carbon, 0.1-20 parts of auxiliary agent, 10-20 parts of filler and 50-70 parts of water. The conductive polymer and the nano activated carbon are used to modify the tourmaline by wet grinding, the electromagnetic property of the conductive polymer is used to improve the ability of the tourmaline to release negative oxygen ions, the excellent adsorption capacity of the nano activated carbon is used to adsorb the free formaldehyde and other toxic gases in the air, and the efficiency of the negative oxygen ions to purify the formaldehyde is improved. Therefore, the conductive polymer-nano activated carbon-tourmaline composite material is used as a negative oxygen ion releasing agent, the formaldehyde purification capacity of the latex paint is improved, and the interior wall latex paint is healthy and environmentally friendly.

Description

Technical Field

[0001] This invention relates to the field of latex paint technology, and in particular to an interior wall latex paint that can release negative oxygen ions and its preparation method. Background Technology

[0002] Traditional latex paint releases harmful gases such as formaldehyde during the drying and curing process, seriously affecting indoor air quality and posing potential health hazards to residents. To address this issue, some researchers have proposed incorporating tourmaline (also known as tourmaline ore) into latex paint, utilizing its ability to release negative oxygen ions to purify the air and decompose harmful gases.

[0003] However, the current efficiency of tourmaline in releasing negative oxygen ions in traditional latex paint is relatively low, resulting in less than ideal purification effects on harmful substances such as formaldehyde in the air. To address this, some technologies combine tourmaline with rare earth elements to significantly improve the release of negative oxygen ions; however, rare earth elements are generally radioactive, potentially posing a radioactive pollution risk when used indoors. Summary of the Invention

[0004] This invention provides an interior wall latex paint that can release negative oxygen ions and its preparation method, in order to solve the technical problem that traditional interior wall latex paints have poor purification capabilities for toxic gases such as formaldehyde.

[0005] To address the aforementioned technical problems, in a first aspect, the present invention provides an interior wall latex paint capable of releasing negative oxygen ions, comprising the following raw material components in parts by weight:

[0006] 30 to 50 parts of water-based acrylic emulsion;

[0007] 20 to 30 parts titanium dioxide;

[0008] 5 to 10 parts tourmaline powder;

[0009] 1 to 3 parts of conductive polymer;

[0010] 1 to 2 parts of nano-activated carbon;

[0011] Additives: 0.1 to 20 parts;

[0012] 10 to 20 parts of filler;

[0013] 50 to 70 parts water.

[0014] In some of the embodiments, the mass ratio of the conductive polymer, nano-activated carbon, and tourmaline powder is 1:0.8:4.5.

[0015] In some of these embodiments, the conductive polymer is one or both of conductive polyaniline and polypyrrole.

[0016] In some of these embodiments, the conductive polyaniline is acid-doped polyaniline, or the polypyrrole is anion-doped polypyrrole.

[0017] Acid-doped polyaniline is obtained by proton acid doping during aniline polymerization using hydrochloric acid, sulfuric acid, perchloric acid, dodecyl sulfonic acid, dodecylbenzene sulfonic acid, camphor sulfonic acid, naphthalene sulfonic acid, or 2,4-dinitronaphthol-7-sulfonic acid as dopants. During the doping process, the number of electrons in polyaniline does not change. Instead, H+ and anti-anions (such as Cl-, sulfate, phosphate, etc.) generated by the decomposition of the doped proton acid enter the main chain and combine with the N atoms in the amine and imine groups to form polars and bipolars, which delocalize into the p-bonds of the entire molecular chain, thus forming a p-type doped polyaniline chain.

[0018] Anion-doped polypyrrole is obtained by doping polypyrrole molecules with halide ions (such as chloride ions, bromide ions, or iodide ions), organic anions (such as benzenesulfonic acid or p-toluenesulfonic acid), or inorganic anions (such as sulfate or phosphate ions). During the doping process, anions enter the molecular structure of polypyrrole, changing its original electron distribution and making it exhibit electronegativity.

[0019] In some of these embodiments, the additives include one or more of film-forming aids, thickeners, dispersants, leveling agents, defoamers, preservatives, and pH adjusters.

[0020] Film-forming aids include one or more of the following: dodecyl alcohol ester, diethylene glycol butyl ether, dipropylene glycol methyl ether, ethylene glycol monobutyl ether, propylene glycol methyl ether acetate, and propylene glycol monomethyl ether. Thickeners include one or more of the following: hydroxyethyl cellulose, hydroxypropyl cellulose, sodium carboxymethyl cellulose, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, and polyoxyethylene-polyoxypropylene copolymer.

[0021] In some of these embodiments, the filler comprises one or more of calcium carbonate, kaolin, talc, and diatomaceous earth.

[0022] Secondly, the present invention also provides a method for preparing an interior wall latex paint that can release negative oxygen ions, comprising the following steps:

[0023] Step 1: Add conductive polymer and nano-activated carbon to tourmaline powder and perform wet milling modification to obtain modified composite material;

[0024] Step 2: Mix titanium dioxide, additives, fillers and water, and stir at a stirring speed of 1800 rpm to 3000 rpm for 40 min to 60 min to obtain mixture A;

[0025] Step 3: Mix the modified composite material with mixture A and stir at a speed of 300 rpm to 600 rpm for 30 min to 45 min to obtain mixture B;

[0026] Step 4: Mix mixture B with water-based acrylic emulsion and stir at a stirring speed of 500 rpm to 1000 rpm for 1 to 3 hours to obtain latex paint.

[0027] In some embodiments, step one includes:

[0028] The conductive polymer, nano-activated carbon, and tourmaline powder are mixed with water to form slurry I with a concentration of 60% to 70%.

[0029] Slurry I and grinding media are added to a low-speed stirred mill and circulated for 5 to 8 hours to obtain slurry II;

[0030] Slurry II and grinding media are added to a high-speed stirred mill and circulated for 3 to 5 hours. After filtration and drying, the modified composite material is obtained. The grinding media includes zirconium oxide or ceramic.

[0031] In some embodiments, the tourmaline powder of slurry II has a particle size of 2 μm to 4 μm, and the tourmaline powder of the modified composite material has a particle size of 0.5 μm to 1.8 μm.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] This invention modifies tourmaline through wet grinding using conductive polymers and nano-activated carbon. The electromagnetic properties of the conductive polymers activate the tourmaline, enhancing its ability to release negative oxygen ions. The excellent adsorption capacity of nano-activated carbon adsorbs free formaldehyde and other toxic gases in the air, improving the efficiency of negative oxygen ions in purifying formaldehyde. Therefore, a conductive polymer-nano-activated carbon-tourmaline composite material is used as a negative oxygen ion release agent to improve the formaldehyde purification capacity of latex paint, achieving healthy and environmentally friendly interior wall latex paint. Detailed Implementation

[0034] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described in detail below. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] As used herein, the terms “prepared from” and “comprising” are synonymous. The terms “comprising,” “including,” “having,” “containing,” or any other variations thereof, as used herein, are intended to cover non-exclusive inclusion. For example, a composition, step, method, article, or apparatus that includes the listed elements is not necessarily limited to those elements, but may include other elements not expressly listed or elements inherent to such composition, step, method, article, or apparatus.

[0036] When a quantity, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pair of any upper or preferred value with any lower or preferred value, regardless of whether the range is disclosed individually. For example, when the range “1 to 5” is disclosed, the described range should be interpreted as including the ranges “1 to 4”, “1 to 3”, “1 to 2”, “1 to 2 and 4 to 5”, “1 to 3 and 5”, etc. When numerical ranges are described herein, unless otherwise stated, the range is intended to include its endpoints and all integers and fractions within that range.

[0037] Furthermore, the indefinite articles “a” and “an” preceding the elements or components of this invention do not impose any limitation on the quantity (i.e., number of occurrences) of the elements or components. Therefore, “an” or “a” should be interpreted as including one or at least one, and the singular form of an element or component also includes the plural form, unless the quantity clearly refers to the singular form.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] Example 1

[0040] An interior wall latex paint that releases negative oxygen ions comprises the following raw material components in parts by weight:

[0041] 30 parts of water-based pure acrylic emulsion;

[0042] 20 parts titanium dioxide;

[0043] Tourmaline powder 5.6 parts;

[0044] 1.2 parts of hydrochloric acid-doped polyaniline;

[0045] 1 part of nano-activated carbon;

[0046] 0.3 parts of twelve alcohol esters;

[0047] 0.2 parts of hydroxyethyl cellulose;

[0048] 5 parts talcum powder;

[0049] Five parts of light calcium carbonate;

[0050] 50 parts water;

[0051] The preparation method includes the following steps:

[0052] Step 1: The conductive polymer, nano-activated carbon, and tourmaline powder are mixed with water to form slurry I with a concentration of 60%. Slurry I and grinding media are added to a low-speed stirred mill and circulated for 5 to 8 hours until the tourmaline powder particle size is within 2 μm to 4 μm to obtain slurry II. Slurry II and grinding media are added to a high-speed stirred mill and circulated for 3 to 5 hours until the tourmaline powder particle size is 1.8 μm. The mixture is then filtered and dried to obtain the modified composite material.

[0053] Step 2: Mix titanium dioxide, additives, fillers and water, and stir at 1800 rpm for 60 minutes to obtain mixture A;

[0054] Step 3: Mix the modified composite material with mixture A and stir at 300 rpm for 45 minutes to obtain mixture B;

[0055] Step 4: Mix mixture B with water-based acrylic emulsion and stir at 500 rpm for 3 hours to obtain latex paint.

[0056] Example 2

[0057] An interior wall latex paint that releases negative oxygen ions comprises the following raw material components in parts by weight:

[0058] 50 parts of water-based pure acrylic emulsion;

[0059] 30 parts titanium dioxide;

[0060] 10 parts tourmaline powder;

[0061] 2.2 parts of chloride-doped polypyrrole;

[0062] 1.8 parts of nano-activated carbon;

[0063] 1.5 parts of twelve-ester alcohol;

[0064] 1 part hydroxyethyl cellulose;

[0065] 10 parts of heavy calcium carbonate;

[0066] 10 parts of kaolin;

[0067] 70 parts water;

[0068] The preparation method includes the following steps:

[0069] Step 1: The conductive polymer, nano-activated carbon, and tourmaline powder are mixed with water to form slurry I with a concentration of 70%. Slurry I and grinding media are added to a low-speed stirred mill and circulated for 5 to 8 hours until the tourmaline powder particle size is within 2 μm to 4 μm to obtain slurry II. Slurry II and grinding media are added to a high-speed stirred mill and circulated for 3 to 5 hours until the tourmaline powder particle size is 0.5 μm. The mixture is then filtered and dried to obtain the modified composite material.

[0070] Step 2: Mix titanium dioxide, additives, fillers and water, and stir at 3000 rpm for 40 minutes to obtain mixture A;

[0071] Step 3: Mix the modified composite material with mixture A and stir at 600 rpm for 30 minutes to obtain mixture B;

[0072] Step 4: Mix mixture B with water-based acrylic emulsion and stir at 1000 rpm for 3 hours to obtain latex paint.

[0073] Example 3

[0074] An interior wall latex paint that releases negative oxygen ions comprises the following raw material components in parts by weight:

[0075] 40 parts of water-based pure acrylic emulsion;

[0076] 25 parts titanium dioxide;

[0077] 9 parts tourmaline powder;

[0078] Two parts of conductive polymer;

[0079] 1.6 parts of nano-activated carbon;

[0080] 1 part of alcohol ester twelve;

[0081] 0.8 parts of hydroxyethyl cellulose;

[0082] 7 parts talcum powder;

[0083] 8 parts of kaolin;

[0084] 60 parts water;

[0085] The preparation method includes the following steps:

[0086] Step 1: The conductive polymer, nano-activated carbon, and tourmaline powder are mixed with water to form slurry I with a concentration of 65%. Slurry I and grinding media are added to a low-speed stirred mill and circulated for 5 to 8 hours until the tourmaline powder particle size is within 2 μm to 4 μm to obtain slurry II. Slurry II and grinding media are added to a high-speed stirred mill and circulated for 3 to 5 hours until the tourmaline powder particle size is 1 μm. The mixture is then filtered and dried to obtain the modified composite material.

[0087] Step 2: Mix titanium dioxide, additives, fillers and water, and stir at 2500 rpm for 50 minutes to obtain mixture A;

[0088] Step 3: Mix the modified composite material with mixture A and stir at 500 rpm for 35 minutes to obtain mixture B;

[0089] Step 4: Mix mixture B with water-based acrylic emulsion and stir at 600 rpm for 2.5 hours to obtain latex paint.

[0090] Comparative Example 1

[0091] The difference from Example 3 is that no conductive polymer was added in Comparative Example 1;

[0092] Comparative Example 2

[0093] The difference from Example 3 is that Comparative Example 2 does not contain nano-activated carbon;

[0094] Comparative Example 3

[0095] The difference from Example 3 is that Comparative Example 3 does not contain conductive polymers and nano-activated carbon;

[0096] Comparative Example 4

[0097] The difference from Example 3 is that the tourmaline powder particle size of the modified composite material in Comparative Example 4 is 0.01 μm.

[0098] According to the building industry standard JC / T1016-2006 "Test Method for Negative Ion Generation of Materials", the negative oxygen ion release performance of the interior wall latex paints in Examples 1 to 3 and Comparative Examples 1 to 4 was tested. The formaldehyde purification efficiency of the above-mentioned interior wall latex paints was tested according to JC / T1074-2008 "Purification Performance of Indoor Air Purification Functional Coating Materials".

[0099] Sample <![CDATA[Negative oxygen ion release amount (ions / cm 3 )]]> Formaldehyde purification efficiency (%) Example 1 5360 >99 Example 2 5770 >99 Example 3 5910 >99 Comparative Example 1 1980 86 Comparative Example 2 3340 88 Comparative Example 3 720 77 Comparative Example 4 5240 99

[0100] The test results in the table above show that the negative oxygen ion release of the interior wall latex paints in Examples 1 to 3 is 5300 ions / cm³. 3The formaldehyde purification efficiency of all examples above is greater than 99%, clearly demonstrating that the addition of the conductive polymer-nano activated carbon-tourmaline modified composite material enables the interior wall latex paint to possess excellent negative oxygen ion release performance. Comparative Example 1, without the addition of conductive polymer, shows a significant decrease in negative oxygen ion release. Comparative Example 2, without the addition of nano activated carbon, shows an even more significant decrease in negative oxygen ion release. However, the formaldehyde purification efficiencies of Comparative Examples 1 and 2 are comparable. This may be because the absence of nano activated carbon in Comparative Example 2 prevents it from adsorbing and purifying free formaldehyde gas in the air, while the absence of conductive polymer in Comparative Example 1 may allow it to reach the upper limit of negative oxygen ion concentration for purification. Comparative Example 3, without the addition of conductive polymer and nano activated carbon, shows a significant decrease in both negative oxygen ion release and formaldehyde purification efficiency. The decrease in negative oxygen ion release in Comparative Example 4 may be due to the smaller tourmaline particle size, which weakens its spontaneous polarization performance, thus reducing its negative oxygen ion release performance.

[0101] This invention modifies tourmaline through wet grinding using conductive polymers and nano-activated carbon. The electromagnetic properties of the conductive polymers enhance the tourmaline's ability to release negative oxygen ions, while the excellent adsorption capacity of nano-activated carbon adsorbs free formaldehyde and other toxic gases in the air, thereby improving the efficiency of negative oxygen ions in purifying formaldehyde. Therefore, a composite material of conductive polymer-nano-activated carbon-tourmaline is used as a negative oxygen ion release agent to improve the formaldehyde purification capacity of latex paint and achieve healthy and environmentally friendly interior wall latex paint.

[0102] 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.

[0103] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention for those skilled in the art.

Claims

1. An interior wall latex paint that can release negative oxygen ions, characterized in that, The raw material components include the following parts by weight: 30 to 50 parts of water-based acrylic emulsion; 20 to 30 parts titanium dioxide; 5 to 10 parts tourmaline powder; 1 to 3 parts of conductive polymer; 1 to 2 parts of nano-activated carbon; Additives: 0.1 to 20 parts; 10 to 20 parts of filler; 50 to 70 parts water; In this process, conductive polymer and nano-activated carbon are added to tourmaline powder and modified by wet milling to obtain a modified composite material; the conductive polymer is one or both of conductive polyaniline and polypyrrole, wherein the conductive polyaniline is acid-doped polyaniline, or the polypyrrole is anion-doped polypyrrole. The method for preparing the modified composite material includes: The conductive polymer, nano-activated carbon, and tourmaline powder are mixed with water to form slurry I with a concentration of 60% to 70%. Slurry I and grinding media are added to a low-speed stirred mill and circulated for 5 to 8 hours to obtain slurry II; Slurry II and grinding media are added to a high-speed stirred mill for 3 to 5 hours of cyclic grinding, then filtered and dried to obtain a modified composite material. The tourmaline powder particle size of the modified composite material is 0.5 μm to 1.8 μm.

2. The interior wall latex paint that releases negative oxygen ions as described in claim 1, characterized in that, The mass ratio of the conductive polymer, nano-activated carbon, and tourmaline powder is 1:0.8:4.

5.

3. The interior wall latex paint that releases negative oxygen ions as described in claim 1, characterized in that, The additives include one or more of the following: film-forming aids, thickeners, dispersants, leveling agents, defoamers, preservatives, and pH adjusters.

4. The interior wall latex paint that releases negative oxygen ions as described in claim 1, characterized in that, The filler includes one or more of calcium carbonate, kaolin, talc, and diatomaceous earth.

5. A method for preparing an interior wall latex paint capable of releasing negative oxygen ions as described in any one of claims 1 to 4, characterized in that, Includes the following steps: Step 1: Add conductive polymer and nano-activated carbon to tourmaline powder and perform wet milling modification to obtain modified composite material; Step 2: Mix titanium dioxide, additives, fillers and water, and stir at a stirring speed of 1800 rpm to 3000 rpm for 40 min to 60 min to obtain mixture A; Step 3: Mix the modified composite material with mixture A and stir at a speed of 300 rpm to 600 rpm for 30 min to 45 min to obtain mixture B; Step 4: Mix mixture B with water-based acrylic emulsion and stir at a stirring speed of 500 rpm to 1000 rpm for 1 to 3 hours to obtain latex paint.

6. The preparation method according to claim 5, characterized in that, Step one includes: The conductive polymer, nano-activated carbon, and tourmaline powder are mixed with water to form slurry I with a concentration of 60% to 70%. Slurry I and grinding media are added to a low-speed stirred mill and circulated for 5 to 8 hours to obtain slurry II; Slurry II and grinding media were added to a high-speed stirred mill and circulated for 3 to 5 hours. After filtration and drying, the modified composite material was obtained.

7. The preparation method according to claim 6, characterized in that, The tourmaline powder in slurry II has a particle size of 2μm to 4μm, and the tourmaline powder in the modified composite material has a particle size of 0.5μm to 1.8μm.