Environment-friendly bamboo charcoal antibacterial formaldehyde-removing inorganic paint and preparation method thereof

Abstract

The invention relates to the technical field of inorganic paint, in particular to environment-friendly bamboo charcoal antibacterial formaldehyde-removing inorganic paint and a preparation method, and the environment-friendly bamboo charcoal antibacterial formaldehyde-removing inorganic paint comprises the following raw materials in parts by mass: film forming substances: 30-40 parts of a potassium silicate solution and 10-15 parts of silica sol; the environment-friendly paint is prepared from the following components in parts by weight: 8-12 parts of bamboo charcoal powder, 1-2 parts of a silane coupling agent, 3-5 parts of an antibacterial agent, 5-8 parts of a formaldehyde purifying agent, 0.5-1 part of a dispersing agent, 0.3-0.5 part of a defoaming agent, 0.5-1 part of a thickening agent, 1-2 parts of an anti-freezing agent and 15-25 parts of a pigment and filler mixture. And 10-20 parts of a carrier. By adding the silane coupling agent, the raw materials of the paint vehicle are modified, so that a more compact three-dimensional network structure is formed inside, the hardness, water resistance and chemical corrosion resistance of a paint film are remarkably improved, and by means of repeated loading operation of the carrier, the service life of the paint film is prolonged. Therefore, the paint vehicle can more effectively and continuously provide efficient antibacterial property and formaldehyde removal effect for a long time.

Description

Technical Field

[0001] The invention relates to the technical field of inorganic paints, and in particular to an environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and a preparation method thereof. Background Art

[0002] Inorganic coating is a kind of coating with inorganic materials as the main film-forming substance. It is the abbreviation of all-inorganic mineral coating. Due to its excellent performance, it is widely used in daily life fields such as construction and painting.

[0003] Inorganic coatings are inorganic polymer coatings composed of inorganic polymers and dispersed and activated metals, metal oxide nanomaterials, and rare earth ultrafine powders. They can react quickly with iron atoms on the surface of steel structures to generate inorganic polymer anti-corrosion coatings that have both physical and chemical protection effects and are firmly bonded to the matrix through chemical bonds. They are pollution-free to the environment, have a long service life, and have anti-corrosion properties that reach international advanced levels. They are high-tech replacement products that meet environmental protection requirements.

[0004] However, in the actual use process, inorganic paints need to take into account the actual use environment to ensure that they have good physical properties and long-term use. However, in this process, more additives are routinely added, which leads to troublesome production steps. In addition, the effective period of the antibacterial and formaldehyde-removing effect of existing paints is short. After a long film-forming time, the antibacterial and formaldehyde-removing effect is greatly reduced, affecting the actual use effect. For this reason, we propose an environmentally friendly bamboo charcoal antibacterial and formaldehyde-removing inorganic paint and a preparation method. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and a preparation method thereof.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and a preparation method thereof, comprising the following raw materials in parts by mass:

[0008] Film-forming substances: 30-40 parts of potassium silicate solution, 10-15 parts of silica sol;

[0009] 8-12 parts of bamboo charcoal powder, 1-2 parts of silane coupling agent, 3-5 parts of antibacterial agent, 5-8 parts of formaldehyde removal agent, 0.5-1 parts of dispersant, 0.3-0.5 parts of defoaming agent, 0.5-1 parts of thickener, 1-2 parts of antifreeze agent, 15-25 parts of pigment filler mixture;

[0010] 10-20 copies of carrier.

[0011] As a preferred technical solution of the present application, the antibacterial agent is any one of a nano silver ion antibacterial agent or a zinc oxide antibacterial agent;

[0012] The carrier is zeolite.

[0013] As a preferred technical solution of the present application, the formaldehyde-removing agent is any one of an amino compound or a photocatalyst.

[0014] As a preferred technical solution of the present application, the pigment-filler mixture includes pigment, heavy calcium carbonate, kaolin, talcum powder, mica powder, and wollastonite powder, and the ratio of the above components is 6:3:2:2:2;

[0015] The pigment is any one of titanium dioxide, iron pigment, phthalocyanine blue or phthalocyanine green.

[0016] As a preferred technical solution of the present application, the dispersant is any one of a polycarboxylate dispersant, an ammonium salt dispersant and a high-grade polymer dispersant.

[0017] As a preferred technical solution of the present application, the defoamer is any one of a mineral oil defoamer, a silicone defoamer and a polyether defoamer.

[0018] As a preferred technical solution of the present application, the thickener is any one of hydroxyethyl cellulose, hydrophobically modified alkali swellable acrylic emulsion and polyurethane thickener.

[0019] As a preferred technical solution of the present application, the antifreeze agent is any one of ethylene glycol, propylene glycol and a mixture of polyols.

[0020] A method for preparing an environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint comprises the following steps:

[0021] Step S1, pretreatment of bamboo charcoal powder: firstly, the bamboo charcoal powder is crushed and sieved to remove large particles of impurities, and then placed in an oven for drying at a temperature of 100° C.-120° C. for 2-3 hours, and then a silane coupling agent is added to the bamboo charcoal powder, and the mixture is placed in a high-speed mixer for stirring for 30-60 minutes, so that the surface of the bamboo charcoal powder is modified, and the dispersibility and compatibility of the bamboo charcoal powder in the coating are improved;

[0022] Step S2, adding a silane coupling agent to the potassium silicate solution, so that the alkoxy groups in the silane coupling agent are hydrolyzed into silanol groups, and then locked with the silanol groups in the potassium silicate, thereby reducing the number of active silanol groups and reducing the occurrence of agglomeration, thereby providing a guarantee for the storage stability of the subsequent paint, and then adding the modified potassium silicate solution and silica sol in the stirring kettle in sequence, and fully stirring and mixing, the stirring speed is 300-500r / min, the stirring time is 10-15min, and then the pretreated bamboo charcoal powder is added to the stirring kettle, and stirring is continued to ensure that the bamboo charcoal powder is fully dispersed in the solution. During this process, the stirring time is 30-60min;

[0023] Step S3, after the antibacterial agent and the formaldehyde-removing agent are diluted into a solution, the carrier is immersed therein, and then the carrier is taken out and dried, and then the carrier can be put in multiple times, and the aforementioned operation is repeated, so that the antibacterial agent and the formaldehyde-removing agent are loaded on the carrier, and then the carrier loaded with the antibacterial agent and the formaldehyde-removing agent is slowly added into the stirring tank, at this time, the stirring speed is ensured to be 200-300r / min, and the stirring time is 15-20min;

[0024] Step S4, mix the pigment and filler in a certain proportion according to the requirements, and then add them into the stirring kettle again, add the dispersant at the same time, and stir them thoroughly in the stirring kettle until the pigment and filler are completely dispersed and evenly dispersed to form a fine slurry. In this process, the stirring speed is 500-800r / min, and the stirring time is 30-60min;

[0025] Step S5, adding defoamer, thickener and antifreeze agent into the stirring kettle, during which the stirring speed is 200-300 r / min and the stirring time is 10-15 min, so that the additives are evenly distributed in the coating;

[0026] Step S6, continuously grinding the mixed paint with a sand mill, and filtering through a gauze after grinding, so that the particles of the paint can be finer and more uniform, further improving the gloss and texture of the paint film. In this process, a gauze with a mesh size of 300 is used for filtering.

[0027] Step S7, subjecting the sieved and collected coating to aging treatment to promote the interaction and stability of the various components in the coating, eliminate possible internal stress and unstable factors, and improve the storage stability and subsequent construction performance of the coating.

[0028] The beneficial effects of the present invention are:

[0029] 1. In the process of paint preparation, the addition of silane coupling agent effectively realizes the modification of bamboo charcoal powder and potassium silicate solution, so that the paint film formed by the subsequent paint coating has good hardness, water resistance and chemical corrosion resistance. In the preparation process, the addition of silane coupling agent as a cross-linking agent reduces the types of auxiliary agents involved. In addition, the use of silane coupling agent allows the cross-linking agent to react with potassium silicate, silica sol and other active ingredients during the film-forming process to form a denser three-dimensional network structure, which significantly improves the hardness, water resistance and chemical corrosion resistance of the paint film.

[0030] 2. During the preparation process, by repeatedly loading the carrier with the antibacterial agent and the formaldehyde-removing agent, the subsequently produced paint can more effectively provide high-efficiency antibacterial and formaldehyde-removing effects for a long time, thereby ensuring the environmental protection effect during actual use.

[0031] In summary, the present application modifies the raw materials of the paint by adding a silane coupling agent, so that a denser three-dimensional network structure is formed inside, which significantly improves the hardness, water resistance and chemical corrosion resistance of the paint film, and through the operation of repeated loading of the carrier, the paint can more effectively provide high-efficiency antibacterial and formaldehyde-removing effects over a long period of time. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] Embodiment 1

[0034] An environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and a preparation method thereof, comprising the following raw materials in parts by mass:

[0035] Film-forming substances: 30g potassium silicate solution, 10g silica sol;

[0036] Bamboo charcoal powder 8g, silane coupling agent 1g, antibacterial agent 3g, formaldehyde removal agent 5g, dispersant 0.5g, defoaming agent 0.3g, thickener 0.5g, antifreeze agent 1g, pigment filler mixture 15g;

[0037] Carrier 10g.

[0038] Furthermore, the antibacterial agent is a nano silver ion antibacterial agent;

[0039] The carrier is zeolite.

[0040] Furthermore, the formaldehyde-removing agent is an amino compound.

[0041] Further, the pigment-filler mixture includes pigment, heavy calcium carbonate, kaolin, talcum powder, mica powder, and wollastonite powder, and the ratio of the above components is 6:3:2:2:2;

[0042] The pigment is titanium dioxide.

[0043] Furthermore, the dispersant is a polycarboxylate dispersant.

[0044] Furthermore, the defoaming agent is a mineral oil defoaming agent.

[0045] Furthermore, the thickener is hydroxyethyl cellulose.

[0046] Furthermore, the antifreeze agent is ethylene glycol.

[0047] A method for preparing an environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint comprises the following steps:

[0048] Step S1, pretreatment of bamboo charcoal powder: firstly, the bamboo charcoal powder is crushed and sieved to remove large particles of impurities, and then placed in an oven for drying at a temperature of 100° C. for a drying time of 2 hours, and then a silane coupling agent is added to the bamboo charcoal powder, and the mixture is placed in a high-speed stirrer for stirring for 30 minutes, so that the surface of the bamboo charcoal powder is modified, and the dispersibility and compatibility of the bamboo charcoal powder in the coating are improved;

[0049] Step S2, adding a silane coupling agent to the potassium silicate solution, so that the alkoxy groups in the silane coupling agent are hydrolyzed into silanol groups, and then locked with the silanol groups in the potassium silicate, thereby reducing the number of active silanol groups and reducing the occurrence of agglomeration, thereby providing a guarantee for the storage stability of the subsequent paint, and then adding the modified potassium silicate solution and silica sol in the stirring kettle in sequence, and fully stirring and mixing, the stirring speed is 300r / min, the stirring time is 10min, and then the pretreated bamboo charcoal powder is added to the stirring kettle, and stirring is continued to ensure that the bamboo charcoal powder is fully dispersed in the solution. During this process, the stirring time is 30min;

[0050] Step S3, after the antibacterial agent and the formaldehyde-removing agent are diluted into a solution, the carrier is immersed therein, and then the carrier is taken out and dried, and then the carrier can be put in multiple times, and the aforementioned operation is repeated, so that the antibacterial agent and the formaldehyde-removing agent are loaded on the carrier, and then the carrier loaded with the antibacterial agent and the formaldehyde-removing agent is slowly added into the stirring tank, at this time, the stirring speed is ensured to be 200r / min, and the stirring time is 15min;

[0051] Step S4: Mix the pigment and filler in a certain proportion according to the requirements, and then add them into the stirring kettle again. Meanwhile, add the dispersant and stir them thoroughly in the stirring kettle until the pigment and filler are completely dispersed and evenly dispersed to form a fine slurry. In this process, the stirring speed is 500 r / min and the stirring time is 30 min.

[0052] Step S5, adding defoamer, thickener and antifreeze agent into the stirring kettle, during which the stirring speed is 200 r / min and the stirring time is 10 min, so that the additives are evenly distributed in the coating;

[0053] Step S6, continuously grinding the mixed paint with a sand mill, and filtering through a gauze after grinding, so that the particles of the paint can be finer and more uniform, further improving the gloss and texture of the paint film. In this process, a gauze with a mesh size of 300 is used for filtering.

[0054] Step S7, subjecting the sieved and collected coating to aging treatment to promote the interaction and stability of the various components in the coating, eliminate possible internal stress and unstable factors, and improve the storage stability and subsequent construction performance of the coating.

[0055] Embodiment 2

[0056] An environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and a preparation method thereof, comprising the following raw materials in parts by mass:

[0057] Film-forming substances: 35g potassium silicate solution, 12g silica sol;

[0058] Bamboo charcoal powder 10g, silane coupling agent 1.5g, antibacterial agent 4g, formaldehyde removal agent 6g, dispersant 0.8g, defoamer 0.4g, thickener 0.8g, antifreeze agent 1.5g, pigment filler mixture 20g;

[0059] Carrier 15g.

[0060] Further, the antibacterial agent is a zinc oxide antibacterial agent;

[0061] The carrier is zeolite.

[0062] Furthermore, the formaldehyde-removing agent is a photocatalyst.

[0063] Further, the pigment-filler mixture includes pigment, heavy calcium carbonate, kaolin, talc, mica powder, wollastonite powder, and the ratio of the above components is 6:3:2:2:2;

[0064] The pigment is an iron-based pigment.

[0065] Furthermore, the dispersant is an ammonium salt dispersant.

[0066] Furthermore, the defoaming agent is a silicone defoaming agent.

[0067] Furthermore, the thickener is a hydrophobically modified alkali-swellable acrylic emulsion.

[0068] Furthermore, the antifreeze agent is propylene glycol.

[0069] A method for preparing an environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint comprises the following steps:

[0070] Step S1, pretreatment of bamboo charcoal powder: firstly, the bamboo charcoal powder is crushed and sieved to remove large particles of impurities, and then placed in an oven for drying at a temperature of 110° C. for a drying time of 2.5 h, and then a silane coupling agent is added to the bamboo charcoal powder, and the mixture is placed in a high-speed stirrer for stirring for 45 min, so that the surface of the bamboo charcoal powder is modified, and the dispersibility and compatibility of the bamboo charcoal powder in the coating are improved;

[0071] Step S2, adding a silane coupling agent to the potassium silicate solution, so that the alkoxy groups in the silane coupling agent are hydrolyzed into silanol groups, and then locked with the silanol groups in the potassium silicate, thereby reducing the number of active silanol groups and reducing the occurrence of agglomeration, thereby providing a guarantee for the storage stability of the subsequent paint, and then adding the modified potassium silicate solution and silica sol in the stirring kettle in sequence, and fully stirring and mixing, the stirring speed is 400r / min, the stirring time is 12min, and then the pretreated bamboo charcoal powder is added to the stirring kettle, and stirring is continued to ensure that the bamboo charcoal powder is fully dispersed in the solution. During this process, the stirring time is 40min;

[0072] Step S3, after the antibacterial agent and the formaldehyde-removing agent are diluted into a solution, the carrier is immersed therein, and then the carrier is taken out and dried, and then the carrier can be put in multiple times, and the aforementioned operation is repeated, so that the antibacterial agent and the formaldehyde-removing agent are loaded on the carrier, and then the carrier loaded with the antibacterial agent and the formaldehyde-removing agent is slowly added into the stirring tank, at this time, the stirring speed is ensured to be 240r / min, and the stirring time is 18min;

[0073] Step S4: Mix the pigment and filler in a certain proportion according to the requirements, and then add them into the stirring kettle again. Meanwhile, add the dispersant and stir them thoroughly in the stirring kettle until the pigment and filler are completely dispersed and form a fine slurry. In this process, the stirring speed is 650 r / min and the stirring time is 45 min.

[0074] Step S5, adding defoamer, thickener and antifreeze agent into the stirring kettle, during which the stirring speed is 240r / min and the stirring time is 12min, so that the additives are evenly distributed in the coating;

[0075] Step S6, continuously grinding the mixed paint with a sand mill, and filtering through a gauze after grinding, so that the particles of the paint can be finer and more uniform, further improving the gloss and texture of the paint film. In this process, a gauze with a mesh size of 300 is used for filtering.

[0076] Step S7, subjecting the sieved and collected coating to aging treatment to promote the interaction and stability of the various components in the coating, eliminate possible internal stress and unstable factors, and improve the storage stability and subsequent construction performance of the coating.

[0077] Embodiment 3

[0078] An environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and a preparation method thereof, comprising the following raw materials in parts by mass:

[0079] Film-forming substances: 40g potassium silicate solution, 15g silica sol;

[0080] Bamboo charcoal powder 12g, silane coupling agent 2g, antibacterial agent 5g, formaldehyde removal agent 8g, dispersant 1g, defoaming agent 0.5g, thickener 1g, antifreeze agent 2g, pigment filler mixture 25g;

[0081] Carrier 20g.

[0082] Furthermore, the antibacterial agent is a nano silver ion antibacterial agent;

[0083] The carrier is zeolite.

[0084] Furthermore, the formaldehyde-removing agent is an amino compound.

[0085] Further, the pigment-filler mixture includes pigment, heavy calcium carbonate, kaolin, talc, mica powder, wollastonite powder, and the ratio of the above components is 6:3:2:2:2;

[0086] The pigment is phthalocyanine blue.

[0087] Furthermore, the dispersant is a highly graded polymer dispersant.

[0088] Furthermore, the defoaming agent is a polyether defoaming agent.

[0089] Furthermore, the thickener is a polyurethane thickener.

[0090] Furthermore, the antifreeze agent is a polyol mixture.

[0091] A method for preparing an environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint comprises the following steps:

[0092] Step S1, pretreatment of bamboo charcoal powder: firstly, the bamboo charcoal powder is crushed and sieved to remove large particles of impurities, and then placed in an oven for drying at a temperature of 120° C. for a drying time of 3 hours, and then a silane coupling agent is added to the bamboo charcoal powder, and the mixture is placed in a high-speed stirrer for stirring for 60 minutes, so that the surface of the bamboo charcoal powder is modified, and the dispersibility and compatibility of the bamboo charcoal powder in the coating are improved;

[0093] Step S2, adding a silane coupling agent to the potassium silicate solution, so that the alkoxy groups in the silane coupling agent are hydrolyzed into silanol groups, and then locked with the silanol groups in the potassium silicate, thereby reducing the number of active silanol groups and reducing the occurrence of agglomeration, thereby providing a guarantee for the storage stability of the subsequent paint, and then adding the modified potassium silicate solution and silica sol in the stirring kettle in sequence, and fully stirring and mixing, the stirring speed is 500r / min, the stirring time is 15min, and then the pretreated bamboo charcoal powder is added to the stirring kettle, and stirring is continued to ensure that the bamboo charcoal powder is fully dispersed in the solution. During this process, the stirring time is 60min;

[0094] Step S3, after the antibacterial agent and the formaldehyde-removing agent are diluted into a solution, the carrier is immersed therein, and then the carrier is taken out and dried, and then the carrier can be put in multiple times, and the aforementioned operation is repeated, so that the antibacterial agent and the formaldehyde-removing agent are loaded on the carrier, and then the carrier loaded with the antibacterial agent and the formaldehyde-removing agent is slowly added into the stirring tank, and at this time, the stirring speed is ensured to be 300r / min, and the stirring time is 20min;

[0095] Step S4: Mix the pigment and filler in a certain proportion according to the requirements, and then add them into the stirring kettle again, and add the dispersant at the same time, and stir them thoroughly in the stirring kettle until the pigment and filler are completely dispersed and evenly dispersed to form a fine slurry. In this process, the stirring speed is 800 r / min and the stirring time is 60 min.

[0096] Step S5, adding defoamer, thickener and antifreeze agent into the stirring kettle, during which the stirring speed is 300 r / min and the stirring time is 15 min, so that the additives are evenly distributed in the coating;

[0097] Step S6, continuously grinding the mixed paint with a sand mill, and filtering through a gauze after grinding, so that the particles of the paint can be finer and more uniform, further improving the gloss and texture of the paint film. In this process, a gauze with a mesh size of 300 is used for filtering.

[0098] Step S7, subjecting the sieved and collected coating to aging treatment to promote the interaction and stability of the various components in the coating, eliminate possible internal stress and unstable factors, and improve the storage stability and subsequent construction performance of the coating.

[0099]

[0100]

[0101] In the above table, the test method for paint film hardness is the pendulum damping hardness method. The specific operation is that two steel balls embedded under the pendulum crossbar contact the coating sample. When the pendulum swings at a certain period, the fixed mass of the pendulum exerts pressure on the coating, causing the coating to produce resistance. The hardness of the coating is determined by the time required for the specified amplitude. The longer the time required, the higher the hardness of the coating. The standard used in the actual test is GB / T 1730-2007.

[0102] The testing method for the water resistance of the paint film is the room temperature immersion method. The specific principle is to immerse the paint film sample in distilled water at room temperature. After a certain period of time, observe the changes on the paint film surface to evaluate the water resistance of the paint film. In the actual operation process, according to the GB / T 1733-1993 standard, 2 / 3 of the area of ​​the painted sample is placed in distilled water at a temperature of 23℃±2℃ and immersed for a specified time, such as 24 hours, 48 ​​hours or 72 hours. After taking it out, observe whether the paint film has blistering, gloss loss, discoloration, peeling and other phenomena, and then make a qualitative description and graded evaluation according to the degree of change on the paint film surface. The specific classification is as follows: if the paint film remains completely original without any change, it is graded as grade one; if there is a slight change on the surface, such as slight gloss loss, it is rated as grade two; if there is an obvious change, such as blistering, discoloration, etc., it is rated as grade three; if there is serious blistering, peeling and other phenomena, it is unqualified.

[0103] The detection method for chemical corrosion resistance is the neutral salt spray test method. According to GB / T 1771 standard, the paint film sample is placed in a salt spray test box and tested with 5% sodium chloride solution at a temperature of 35°C in a continuous spraying manner. After a certain period of time, such as 24 hours, 48 ​​hours, 72 hours, etc., the sample is taken out to observe the proportion of rust, blistering, and peeling on the paint film surface to the total area.

[0104] Through the test detection of Example 1, Example 2 and Example 3, it is effectively concluded that in the actual processing process, by modifying the bamboo charcoal powder with a silane coupling agent, and modifying the potassium silicate solution with the help of a silane coupling agent, the paint film formed by the subsequent paint coating has good hardness, water resistance and chemical corrosion resistance. In the preparation process, by adding a silane coupling agent as a cross-linking agent, the types of auxiliary agents involved are reduced, and by using a silane coupling agent, in the film-forming process, the cross-linking agent reacts with potassium silicate, silica sol and other active ingredients to form a more compact three-dimensional network structure, which significantly improves the hardness, water resistance and chemical corrosion resistance of the paint film.

[0105] Comparative Example 1

[0106] An environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and a preparation method thereof, comprising the following raw materials in parts by mass:

[0107] Film-forming substances: 30g potassium silicate solution, 10g silica sol;

[0108] Bamboo charcoal powder 8g, antibacterial agent 3g, formaldehyde removal agent 5g, dispersant 0.5g, defoamer 0.3g, thickener 0.5g, antifreeze agent 1g, pigment filler mixture 15g;

[0109] Carrier 10g.

[0110] Furthermore, the antibacterial agent is a nano silver ion antibacterial agent;

[0111] The carrier is zeolite.

[0112] Furthermore, the formaldehyde-removing agent is an amino compound.

[0113] Further, the pigment-filler mixture includes pigment, heavy calcium carbonate, kaolin, talc, mica powder, wollastonite powder, and the ratio of the above components is 6:3:2:2:2;

[0114] The pigment is titanium dioxide.

[0115] Furthermore, the dispersant is a polycarboxylate dispersant.

[0116] Furthermore, the defoaming agent is a mineral oil defoaming agent.

[0117] Furthermore, the thickener is hydroxyethyl cellulose.

[0118] Furthermore, the antifreeze agent is ethylene glycol.

[0119] A method for preparing an environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint comprises the following steps:

[0120] Step S1, pretreatment of bamboo charcoal powder: firstly, the bamboo charcoal powder is crushed and sieved to remove large particles of impurities, and then placed in an oven for drying at a temperature of 100° C. for a drying time of 2 h;

[0121] Step S2, adding potassium silicate solution and silica sol into a stirring kettle in sequence, stirring and mixing them thoroughly, stirring at a speed of 300 r / min for 10 min, and then adding the pretreated bamboo charcoal powder into the stirring kettle, stirring continuously to ensure that the bamboo charcoal powder is fully dispersed in the solution, during this process, the stirring time is 30 min;

[0122] Step S3, after the antibacterial agent and the formaldehyde-removing agent are diluted into a solution, the carrier is immersed therein, and then the carrier is taken out and dried, and then the carrier can be put in multiple times, and the aforementioned operation is repeated, so that the antibacterial agent and the formaldehyde-removing agent are loaded on the carrier, and then the carrier loaded with the antibacterial agent and the formaldehyde-removing agent is slowly added into the stirring tank, at this time, the stirring speed is ensured to be 200r / min, and the stirring time is 15min;

[0123] Step S4: Mix the pigment and filler in a certain proportion according to the requirements, and then add them into the stirring kettle again. Meanwhile, add the dispersant and stir them thoroughly in the stirring kettle until the pigment and filler are completely dispersed and evenly dispersed to form a fine slurry. In this process, the stirring speed is 500 r / min and the stirring time is 30 min.

[0124] Step S5, adding defoamer, thickener and antifreeze agent into the stirring kettle, during which the stirring speed is 200 r / min and the stirring time is 10 min, so that the additives are evenly distributed in the coating;

[0125] Step S6, continuously grinding the mixed paint with a sand mill, and filtering through a gauze after grinding, so that the particles of the paint can be finer and more uniform, further improving the gloss and texture of the paint film. In this process, a gauze with a mesh size of 300 is used for filtering.

[0126] Step S7, subjecting the sieved and collected coating to aging treatment to promote the interaction and stability of the various components in the coating, eliminate possible internal stress and unstable factors, and improve the storage stability and subsequent construction performance of the coating.

[0127] Comparative Example 2

[0128] An environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and a preparation method thereof, comprising the following raw materials in parts by mass:

[0129] Film-forming substances: 30g potassium silicate solution, 10g silica sol;

[0130] Bamboo charcoal powder 8g, silane coupling agent 1g, antibacterial agent 3g, formaldehyde removal agent 5g, dispersant 0.5g, defoaming agent 0.3g, thickener 0.5g, antifreeze agent 1g, pigment filler mixture 15g;

[0131] Carrier 10g.

[0132] Furthermore, the antibacterial agent is a nano silver ion antibacterial agent;

[0133] The carrier is zeolite.

[0134] Furthermore, the formaldehyde-removing agent is an amino compound.

[0135] Further, the pigment-filler mixture includes pigment, heavy calcium carbonate, kaolin, talcum powder, mica powder, and wollastonite powder, and the ratio of the above components is 6:3:2:2:2;

[0136] The pigment is titanium dioxide.

[0137] Furthermore, the dispersant is a polycarboxylate dispersant.

[0138] Furthermore, the defoaming agent is a mineral oil defoaming agent.

[0139] Furthermore, the thickener is hydroxyethyl cellulose.

[0140] Furthermore, the antifreeze agent is ethylene glycol.

[0141] A method for preparing an environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint comprises the following steps:

[0142] Step S1, pretreatment of bamboo charcoal powder: firstly, the bamboo charcoal powder is crushed and sieved to remove large particles of impurities, and then placed in an oven for drying at a temperature of 100° C. for a drying time of 2 hours, and then a silane coupling agent is added to the bamboo charcoal powder, and the mixture is placed in a high-speed stirrer for stirring for 30 minutes, so that the surface of the bamboo charcoal powder is modified, and the dispersibility and compatibility of the bamboo charcoal powder in the coating are improved;

[0143] Step S2, adding a silane coupling agent to the potassium silicate solution, so that the alkoxy groups in the silane coupling agent are hydrolyzed into silanol groups, and then locked with the silanol groups in the potassium silicate, thereby reducing the number of active silanol groups and reducing the occurrence of agglomeration, thereby providing a guarantee for the storage stability of the subsequent paint, and then adding the modified potassium silicate solution and silica sol in the stirring kettle in sequence, and fully stirring and mixing, the stirring speed is 300r / min, the stirring time is 10min, and then the pretreated bamboo charcoal powder is added to the stirring kettle, and stirring is continued to ensure that the bamboo charcoal powder is fully dispersed in the solution. During this process, the stirring time is 30min;

[0144] Step S3, after the antibacterial agent and the formaldehyde-removing agent are diluted into a solution, the carrier is immersed therein, and then the carrier is taken out and dried, and then the carrier can be put in multiple times, and the aforementioned operation is repeated, so that the antibacterial agent and the formaldehyde-removing agent are loaded on the carrier, and then the carrier loaded with the antibacterial agent and the formaldehyde-removing agent is slowly added into the stirring tank, at this time, the stirring speed is ensured to be 200r / min, and the stirring time is 15min;

[0145] Step S4: Mix the pigment and filler in a certain proportion according to the requirements, and then add them into the stirring kettle again. Meanwhile, add the dispersant and stir them thoroughly in the stirring kettle until the pigment and filler are completely dispersed and evenly dispersed to form a fine slurry. In this process, the stirring speed is 500 r / min and the stirring time is 30 min.

[0146] Step S5, adding defoamer, thickener and antifreeze agent into the stirring kettle, during which the stirring speed is 200 r / min and the stirring time is 10 min, so that the additives are evenly distributed in the coating;

[0147] Step S6, continuously grinding the mixed paint with a sand mill, and filtering through a gauze after grinding, so that the particles of the paint can be finer and more uniform, further improving the gloss and texture of the paint film. In this process, a gauze with a mesh size of 300 is used for filtering.

[0148] Step S7, subjecting the sieved and collected coating to aging treatment to promote the interaction and stability of the various components in the coating, eliminate possible internal stress and unstable factors, and improve the storage stability and subsequent construction performance of the coating.

[0149] Comparative Example 3

[0150] An environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and a preparation method thereof, comprising the following raw materials in parts by mass:

[0151] Film-forming substances: 30g potassium silicate solution, 10g silica sol;

[0152] Bamboo charcoal powder 8g, silane coupling agent 4g, antibacterial agent 3g, formaldehyde removal agent 5g, dispersant 0.5g, defoaming agent 0.3g, thickener 0.5g, antifreeze agent 1g, pigment filler mixture 15g;

[0153] Carrier 10g.

[0154] Furthermore, the antibacterial agent is a nano silver ion antibacterial agent;

[0155] The carrier is zeolite.

[0156] Furthermore, the formaldehyde-removing agent is an amino compound.

[0157] Further, the pigment-filler mixture includes pigment, heavy calcium carbonate, kaolin, talc, mica powder, wollastonite powder, and the ratio of the above components is 6:3:2:2:2;

[0158] The pigment is titanium dioxide.

[0159] Furthermore, the dispersant is a polycarboxylate dispersant.

[0160] Furthermore, the defoaming agent is a mineral oil defoaming agent.

[0161] Furthermore, the thickener is hydroxyethyl cellulose.

[0162] Furthermore, the antifreeze agent is ethylene glycol.

[0163] A method for preparing an environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint comprises the following steps:

[0164] Step S1, pretreatment of bamboo charcoal powder: firstly, the bamboo charcoal powder is crushed and sieved to remove large particles of impurities, and then placed in an oven for drying at a temperature of 100° C. for a drying time of 2 hours, and then a silane coupling agent is added to the bamboo charcoal powder, and the mixture is placed in a high-speed stirrer for stirring for 30 minutes, so that the surface of the bamboo charcoal powder is modified, and the dispersibility and compatibility of the bamboo charcoal powder in the coating are improved;

[0165] Step S2, adding a silane coupling agent to the potassium silicate solution, so that the alkoxy groups in the silane coupling agent are hydrolyzed into silanol groups, and then locked with the silanol groups in the potassium silicate, thereby reducing the number of active silanol groups and reducing the occurrence of agglomeration, thereby providing a guarantee for the storage stability of the subsequent paint, and then adding the modified potassium silicate solution and silica sol in the stirring kettle in sequence, and fully stirring and mixing, the stirring speed is 300r / min, the stirring time is 10min, and then the pretreated bamboo charcoal powder is added to the stirring kettle, and stirring is continued to ensure that the bamboo charcoal powder is fully dispersed in the solution. During this process, the stirring time is 30min;

[0166] Step S3, after the antibacterial agent and the formaldehyde-removing agent are diluted into a solution, the carrier is immersed therein, and then the carrier is taken out and dried, and then the carrier can be put in multiple times, and the aforementioned operation is repeated, so that the antibacterial agent and the formaldehyde-removing agent are loaded on the carrier, and then the carrier loaded with the antibacterial agent and the formaldehyde-removing agent is slowly added into the stirring tank, at this time, the stirring speed is ensured to be 200r / min, and the stirring time is 15min;

[0167] Step S4: Mix the pigment and filler in a certain proportion according to the requirements, and then add them into the stirring kettle again. Meanwhile, add the dispersant and stir them thoroughly in the stirring kettle until the pigment and filler are completely dispersed and evenly dispersed to form a fine slurry. In this process, the stirring speed is 500 r / min and the stirring time is 30 min.

[0168] Step S5, adding defoamer, thickener and antifreeze agent into the stirring kettle, during which the stirring speed is 200 r / min and the stirring time is 10 min, so that the additives are evenly distributed in the coating;

[0169] Step S6, continuously grinding the mixed paint with a sand mill, and filtering through a gauze after grinding, so that the particles of the paint can be finer and more uniform, further improving the gloss and texture of the paint film. In this process, a gauze with a mesh size of 300 is used for filtering.

[0170] Step S7, subjecting the sieved and collected coating to aging treatment to promote the interaction and stability of the various components in the coating, eliminate possible internal stress and unstable factors, and improve the storage stability and subsequent construction performance of the coating.

[0171] Comparative Example 4

[0172] An environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and a preparation method thereof, comprising the following raw materials in parts by mass:

[0173] Film-forming substances: 30g potassium silicate solution, 10g silica sol;

[0174] Bamboo charcoal powder 8g, silane coupling agent 1g, antibacterial agent 3g, formaldehyde removal agent 5g, dispersant 0.5g, defoaming agent 0.3g, thickener 0.5g, antifreeze agent 1g, pigment filler mixture 15g;

[0175] Carrier 10g.

[0176] Furthermore, the antibacterial agent is a nano silver ion antibacterial agent;

[0177] The carrier is zeolite.

[0178] Furthermore, the formaldehyde-removing agent is an amino compound.

[0179] Further, the pigment-filler mixture includes pigment, heavy calcium carbonate, kaolin, talcum powder, mica powder, and wollastonite powder, and the ratio of the above components is 6:3:2:2:2;

[0180] The pigment is titanium dioxide.

[0181] Furthermore, the dispersant is a polycarboxylate dispersant.

[0182] Furthermore, the defoaming agent is a mineral oil defoaming agent.

[0183] Furthermore, the thickener is hydroxyethyl cellulose.

[0184] Furthermore, the antifreeze agent is ethylene glycol.

[0185] A method for preparing an environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint comprises the following steps:

[0186] Step S1, pretreatment of bamboo charcoal powder: firstly, the bamboo charcoal powder is crushed and sieved to remove large particles of impurities, and then placed in an oven for drying at a temperature of 100° C. for a drying time of 2 hours, and then a silane coupling agent is added to the bamboo charcoal powder, and the mixture is placed in a high-speed stirrer for stirring for 30 minutes, so that the surface of the bamboo charcoal powder is modified, and the dispersibility and compatibility of the bamboo charcoal powder in the coating are improved;

[0187] Step S2, adding a silane coupling agent to the potassium silicate solution, so that the alkoxy groups in the silane coupling agent are hydrolyzed into silanol groups, and then locked with the silanol groups in the potassium silicate, thereby reducing the number of active silanol groups and reducing the occurrence of agglomeration, thereby providing a guarantee for the storage stability of the subsequent paint, and then adding the modified potassium silicate solution and silica sol in the stirring kettle in sequence, and fully stirring and mixing, the stirring speed is 300r / min, the stirring time is 10min, and then the pretreated bamboo charcoal powder is added to the stirring kettle, and stirring is continued to ensure that the bamboo charcoal powder is fully dispersed in the solution. During this process, the stirring time is 30min;

[0188] Step S3, after the antibacterial agent and the formaldehyde-removing agent are diluted into a solution, the carrier is immersed therein, and then the carrier is taken out and dried, so that the antibacterial agent and the formaldehyde-removing agent are loaded on the carrier, and then the carrier loaded with the antibacterial agent and the formaldehyde-removing agent is slowly added into the stirring tank, at this time, the stirring speed is ensured to be 200r / min, and the stirring time is 15min;

[0189] Step S4: Mix the pigment and filler in a certain proportion according to the requirements, and then add them into the stirring kettle again. Meanwhile, add the dispersant and stir them thoroughly in the stirring kettle until the pigment and filler are completely dispersed and evenly dispersed to form a fine slurry. In this process, the stirring speed is 500 r / min and the stirring time is 30 min.

[0190] Step S5, adding defoamer, thickener and antifreeze agent into the stirring kettle, during which the stirring speed is 200 r / min and the stirring time is 10 min, so that the additives are evenly distributed in the coating;

[0191] Step S6, continuously grinding the mixed paint with a sand mill, and filtering through a gauze after grinding, so that the particles of the paint can be finer and more uniform, further improving the gloss and texture of the paint film. In this process, a gauze with a mesh size of 300 is used for filtering.

[0192] Step S7, subjecting the sieved and collected coating to aging treatment to promote the interaction and stability of the various components in the coating, eliminate possible internal stress and unstable factors, and improve the storage stability and subsequent construction performance of the coating.

[0193]

[0194]

[0195]

[0196] In the above table, the detection method of formaldehyde removal rate is: Test chamber method:

[0197] Specific principle: Place the sample coated with paint film in a test chamber and inject a certain amount of formaldehyde. After a period of time, detect the changes in formaldehyde concentration in the chamber to evaluate the formaldehyde removal effect of the paint film.

[0198] Operation steps: First, place the prepared test sample and blank glass plate into the sample chamber and comparison chamber respectively. Place four plates on the sample rack in each chamber, and place the sample plate with the sample painted on the side facing the center of the chamber. Next, use a microsyringe to take (3±0.25)μl of analytical pure formaldehyde solution, drip it into the glass plate through the injection hole, and seal the injection hole. When testing non-photocatalytic materials, do not turn on the fluorescent lamps in both chambers. After sealing for 1h, collect the gas in the chamber to test its concentration. This concentration is the initial concentration n 0 After 24h (72h), collect the gas in the chamber and test its concentration. This concentration is the end concentration n 1 .

[0199] Data shows: According to the formula, formaldehyde removal rate = (n 0 -n 1 ) / n 0 *100% calculated formaldehyde removal rate.

[0200] The antibacterial testing method is: Film method:

[0201] Principle: Simulate the contact between paint and bacteria in actual application, make the bacteria evenly contact the surface of the paint film, and after cultivation, calculate the antibacterial rate by detecting the number of live bacteria in the sample to evaluate the antibacterial performance of the paint film.

[0202] Operation steps: First, select appropriate bacteria, such as Escherichia coli, Staphylococcus aureus, etc., and prepare bacterial suspension. Then inoculate the bacterial suspension onto the coating test plate and the blank control test plate, cover the sample plate with a sterilized film, make the bacteria evenly contact the surface of the sample plate, and culture it in a plate at 37±1℃ and relative humidity>90% for 24h (72h). Then wash, culture, count, and calculate the antibacterial rate.

[0203] The data shows that the antibacterial rate is calculated according to the formula: antibacterial rate = (number of live bacteria in the blank control - number of live bacteria in the antibacterial coating sample) / number of live bacteria in the blank control * 100%.

[0204] From the above table, it can be seen that the following conclusions are drawn from the comparison between Example 1 and Comparative Examples 1 to 4:

[0205] By comparing Example 1 with Comparative Example 1, it can be effectively known that the presence or absence of the silane coupling agent greatly affects the hardness, water resistance and chemical corrosion resistance of the subsequent paint film. The product quality of the paint is effectively improved by the modification operation of the silane coupling agent.

[0206] By comparing Example 1 with Comparative Example 4, it can be effectively learned that when the amount of silane coupling agent involved is large, an inflection point will occur in the process of improving the product quality of the paint, resulting in a downward trend in the hardness, water resistance and chemical corrosion resistance of the subsequent paint film. Therefore, in the actual production process, it is necessary to ensure that the amount of silane coupling agent added is guaranteed to be less than 5% to avoid an inflection point and affect the production quality.

[0207] By comparing Example 1, Comparative Example 1, Comparative Example 2 and Comparative Example 4 with Comparative Example 3, it can be effectively learned that during the loading process of the antibacterial agent and the formaldehyde-removing agent, the carrier repeatedly loads the antibacterial agent and the formaldehyde-removing agent to increase the loading amount of the antibacterial agent and the formaldehyde-removing agent on the carrier surface, which can effectively extend the subsequent antibacterial properties and the effective period of the formaldehyde-removing rate of the paint, thereby enabling the paint to provide better antibacterial and formaldehyde-removing effects during actual use, thereby ensuring environmental protection and antibacterial and formaldehyde-removing effects during actual use.

[0208] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and a preparation method thereof, characterized in that: In parts by mass, it includes the following raw materials: Film-forming substances: 30-40 parts of potassium silicate solution, 10-15 parts of silica sol; 8-12 parts of bamboo charcoal powder, 1-2 parts of silane coupling agent, 3-5 parts of antibacterial agent, 5-8 parts of formaldehyde removal agent, 0.5-1 parts of dispersant, 0.3-0.5 parts of defoaming agent, 0.5-1 parts of thickener, 1-2 parts of antifreeze agent, 15-25 parts of pigment filler mixture; 10-20 copies of carrier.

2. The environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and preparation method according to claim 1, characterized in that: The antibacterial agent is any one of a nano silver ion antibacterial agent or a zinc oxide antibacterial agent; The carrier is zeolite.

3. The environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and preparation method according to claim 1, characterized in that: The formaldehyde-removing agent is any one of an amino compound or a photocatalyst.

4. The environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and preparation method according to claim 1, characterized in that: The pigment-filler mixture includes pigment, heavy calcium carbonate, kaolin, talcum powder, mica powder, and wollastonite powder, and the ratio of the above components is 6:3:2:2:2; The pigment is any one of titanium dioxide, iron pigment, phthalocyanine blue or phthalocyanine green.

5. The environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and preparation method according to claim 1, characterized in that: The dispersant is any one of a polycarboxylate dispersant, an ammonium salt dispersant and a high-grade polymer dispersant.

6. The environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and preparation method according to claim 1, characterized in that: The defoamer is any one of a mineral oil defoamer, a silicone defoamer and a polyether defoamer.

7. The environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and preparation method according to claim 1, characterized in that: The thickener is any one of hydroxyethyl cellulose, hydrophobically modified alkali swellable acrylic emulsion and polyurethane thickener.

8. The environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint and preparation method according to claim 1, characterized in that: The antifreeze agent is any one of ethylene glycol, propylene glycol and a mixture of polyols.

9. A method for preparing the environmentally friendly bamboo charcoal antibacterial formaldehyde-free inorganic paint according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step S1, pretreatment of bamboo charcoal powder: firstly, the bamboo charcoal powder is crushed and sieved to remove large particles of impurities, and then placed in an oven for drying at a temperature of 100° C.-120° C. for 2-3 hours, and then a silane coupling agent is added to the bamboo charcoal powder, and the mixture is placed in a high-speed mixer for stirring for 30-60 minutes, so that the surface of the bamboo charcoal powder is modified, and the dispersibility and compatibility of the bamboo charcoal powder in the coating are improved; Step S2, adding a silane coupling agent to the potassium silicate solution, so that the alkoxy groups in the silane coupling agent are hydrolyzed into silanol groups, and then locked with the silanol groups in the potassium silicate, thereby reducing the number of active silanol groups and reducing the occurrence of agglomeration, thereby providing a guarantee for the storage stability of the subsequent paint, and then adding the modified potassium silicate solution and silica sol in the stirring kettle in sequence, and fully stirring and mixing, the stirring speed is 300-500r / min, the stirring time is 10-15min, and then the pretreated bamboo charcoal powder is added to the stirring kettle, and stirring is continued to ensure that the bamboo charcoal powder is fully dispersed in the solution. During this process, the stirring time is 30-60min; Step S3, after the antibacterial agent and the formaldehyde-removing agent are diluted into a solution, the carrier is immersed therein, and then the carrier is taken out and dried, and then the carrier can be put in multiple times, and the aforementioned operation is repeated, so that the antibacterial agent and the formaldehyde-removing agent are loaded on the carrier, and then the carrier loaded with the antibacterial agent and the formaldehyde-removing agent is slowly added into the stirring tank, at this time, the stirring speed is ensured to be 200-300r / min, and the stirring time is 15-20min; Step S4, mix the pigment and filler in a certain proportion according to the requirements, and then add them into the stirring kettle again, add the dispersant at the same time, and stir them thoroughly in the stirring kettle until the pigment and filler are completely dispersed and evenly dispersed to form a fine slurry. In this process, the stirring speed is 500-800r / min, and the stirring time is 30-60min; Step S5, adding defoamer, thickener and antifreeze agent into the stirring kettle, during which the stirring speed is 200-300 r / min and the stirring time is 10-15 min, so that the additives are evenly distributed in the coating; Step S6, continuously grinding the mixed paint with a sand mill, and filtering through a gauze after grinding, so that the particles of the paint can be finer and more uniform, further improving the glossiness and texture of the paint film, and in this process, a gauze with a mesh number of 300 is used for filtering; Step S7, subjecting the sieved and collected coating to aging treatment to promote the interaction and stability of the various components in the coating, eliminate possible internal stress and unstable factors, and improve the storage stability and subsequent construction performance of the coating.

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