High-air-permeability coating for decomposing formaldehyde and two-in-one construction process of high-air-permeability coating

Abstract

The invention discloses a high-permeability coating capable of decomposing formaldehyde and a two-in-one construction process thereof, and the coating is divided into a first component, a second component, a third component and a fourth component, the first component comprises the following components in percentage by weight: 20%-24% of water, 0.1%-0.3% of hydroxyethyl cellulose with the viscosity of 15K, 0.1%-0.3% of hydroxyethyl cellulose with the viscosity of 3W and 0.1%-0.3% of a defoaming agent; the second component comprises the following components in percentage by weight: 0.3%-0.6% of a dispersing agent, 0.1%-0.3% of a wetting agent, 18%-22% of titanium dioxide, 4%-6% of wollastonite powder, 10%-20% of heavy calcium powder, 0.5%-1% of inorganic gel and 0.5%-1% of nano titanium dioxide. The coating has good air permeability, bactericidal performance and formaldehyde absorption and decomposition capability, and has more long-acting bactericidal, mildew-proof and formaldehyde absorption and decomposition capabilities when being matched with a diatom ooze coating for use.

Description

Technical Field

[0001] The invention relates to the technical field of building interior wall coatings, and in particular to a highly air-permeable coating capable of decomposing formaldehyde and a two-in-one construction process thereof. Background Art

[0002] Most of the existing interior wall coatings form a dense surface film on the wall, such as latex paint, artistic paint, etc. The dense surface film will lead to poor air permeability of the wall, making it difficult for water vapor inside the wall to seep out, and eventually leading to mold growth inside the wall.

[0003] To solve this problem, some manufacturers have developed breathable coatings, which include organic and inorganic types. The main components of the organic type are: ethylene-vinyl acetate polymer, propylene glycol, diisobutyl succinate, diethyl butyl glutarate, diisobutyl adipate and auxiliary materials. The auxiliary materials are mainly bamboo charcoal factors or titanium dioxide to enhance antibacterial properties. The main components of the inorganic type are: potassium silicate and silicone emulsion.

[0004] The above two types of breathing coatings have air permeability, bactericidal and mildew-proof functions, but their long-term effectiveness is poor, and the price of organic breathing coatings is relatively high.

[0005] Adding diatom mud coating to the breathing coating to form a two-in-one breathing wall can improve the sound insulation and mildew resistance of the wall. For example, apply a layer of diatom mud coating on the rough inner wall, and then apply one or two layers of breathing coating. Among them, the active ingredients of organic breathing coating will be absorbed by diatom mud, which has certain disadvantages, and inorganic breathing coating does not have sufficient absorption and decomposition ability for formaldehyde.

[0006] Therefore, there is an urgent need for a highly breathable coating and a two-in-one construction process for decomposing formaldehyde that can solve one or more of the above problems. Summary of the invention

[0007] In order to solve one or more problems existing in the prior art, the present invention provides a highly air-permeable coating for decomposing formaldehyde. The technical solution adopted by the present invention to solve the above problems is: the coating is divided into: a first component, a second component, a third component and a fourth component in the order of addition; the weight percentage of each component of the first component in the coating is: 20%-24% water, 0.1%-0.3% hydroxyethyl cellulose with a viscosity of 15K, 0.1%-0.3% hydroxyethyl cellulose with a viscosity of 3W, and 0.1%-0.3% defoaming agent;

[0008] The weight percentages of the components of the second component in the coating are: dispersant 0.3%-0.6%, wetting agent 0.1%-0.3%, titanium dioxide 18%-22%, wollastonite powder 4%-6%, heavy calcium powder 10%-20%, inorganic gel 0.5%-1%, nano titanium dioxide 0.5%-1%;

[0009] The weight percentages of the components of the third component in the coating are: potassium silicate 20%-32%, silica sol 2%-5%, leveling agent 0.1%-0.3%, defoaming agent 0.1%-0.3%, mildew and antibacterial agent 0.1%-0.5%;

[0010] The weight percentages of the components of the fourth component in the coating are: 1%-3% water, 0.2%-0.4% hydroxyethyl cellulose with a viscosity of 3W.

[0011] In some embodiments, the heavy calcium powder is 800 mesh.

[0012] And a two-in-one construction process using the above-mentioned coating, the construction process comprising: S10, wall surface treatment, removing dust blocks, scum and debris on the wall surface and cleaning the wall surface;

[0013] S20, preparing diatom mud coating, adding water to the diatom mud, stirring and dispersing the diatom mud in sequence to prepare the diatom mud coating;

[0014] S30, diatom mud scraping, using the diatom mud paint to scrape the wall surface, and after the scraping is completed, curing, polishing and cleaning are performed to obtain a diatom mud wall surface with a fresh surface exposed;

[0015] S40, the breathing paint is applied, the breathing paint is stirred evenly, the breathing paint is applied by any one of roller coating, brush coating, spray coating and airless spray coating, and the breathing paint is applied on the diatom mud wall with a fresh surface exposed.

[0016] In some embodiments, the weight percentages of the components of the diatom mud used are: composite alkali powder 22%-30%, diatomaceous earth 22%-30%, natural adsorption powder 5%-10%, heavy calcium powder 18%-22%, wollastonite needle powder 5%-10%, natural rubber powder 4%-5%, natural cellulose 0.5%-0.8%, negative ion powder 0.1%-0.3%, dry powder defoaming agent 0.1%-0.3%, and dry powder biological mildew inhibitor 0.1%-0.3%.

[0017] The technical effect achieved by the present invention is that the coating prepared by the above components has good air permeability, bactericidal performance and the ability to absorb and decompose formaldehyde, and the manufacturing cost is lower than that of traditional organic breathing coatings. When used with diatom mud coatings, it has a longer-lasting ability to kill bacteria and mildew and absorb and decompose formaldehyde; the breathing wall made by the above two-in-one construction process, the nano titanium dioxide, negative ion powder and diatomaceous earth in the components form a good pore structure, and the air permeability and adsorption capacity are strong, and then the formaldehyde in the air is absorbed and decomposed by the photocatalytic properties of nano titanium dioxide. The high air permeability and the inner diatom mud coating can well release the carbon dioxide and water obtained after the decomposition of formaldehyde, avoid the accumulation of water in the wall and the breathing wall, and the obtained breathing wall has the functions of formaldehyde removal, sterilization, humidity adjustment, purification, mildew prevention, fire prevention, sound insulation and energy saving, which meets the needs of consumers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic block diagram of the construction process of the present invention;

[0019] Figure 2 The formaldehyde purification test report of the present invention;

[0020] Figure 3 The sterilization test report of the present invention;

[0021] Figure 4 It is the negative ion detection report of the present invention;

[0022] Figure 5 The mildew-proof test report of the present invention;

[0023] Figure 6 This is the fire detection report of the present invention. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more understandable, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from this description, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0025] The invention discloses a highly air-permeable coating for decomposing formaldehyde. The coating is divided into a first component, a second component, a third component and a fourth component according to the order of addition. The first to fourth components are divided according to the order of addition.

[0026] The weight percentages of the components of the first component in the coating are: water 20%-24% (solvent), 15K viscosity hydroxyethyl cellulose 0.1%-0.3% (preliminary thickening and moisturizing), 3W viscosity hydroxyethyl cellulose 0.1%-0.3% (enhanced thickening and moisturizing), defoamer 0.1%-0.3% (defoaming);

[0027] The weight percentages of the components of the second component in the coating are: dispersant 0.3%-0.6% (dispersing effect), wetting agent 0.1%-0.3% (wetting effect), titanium dioxide 18%-22% (pigment, high hiding, high reflection effect), wollastonite powder 4%-6% (anti-cracking effect), heavy calcium powder 10%-20% (filler), inorganic gel 0.5%-1% (anti-settling effect), nano titanium dioxide 0.5%-1% (bactericidal, self-cleaning function and decomposition of formaldehyde, benzene and benzene series), wherein the heavy calcium powder is 800 mesh;

[0028] The weight percentages of the components of the third component in the coating are: potassium silicate 20%-32% (film-forming, bonding effect), silica sol 2%-5% (film-forming, bonding effect), leveling agent 0.1%-0.3% (leveling effect), defoaming agent 0.1%-0.3% (defoaming effect), mildew and antibacterial agent 0.1%-0.5% (mildew and bactericidal effect);

[0029] The weight percentages of the components of the fourth component in the coating are: 1%-3% water, 0.2%-0.4% hydroxyethyl cellulose of 3W viscosity (thickening and moisturizing effect);

[0030] When calculating whether the components of the coating meet the rules, all components from the first to the second components should be calculated. The specification of the nano titanium dioxide is: the diameter is less than or equal to 60 nanometers, and the auxiliary agent in the component is a conventional auxiliary agent.

[0031] The coating preparation method comprises: (1) when the dispersion tank is running at a low speed, the components in the first component are sequentially added into the dispersion tank, and after being evenly mixed, they are stirred at a high speed for 20 minutes until the added components are completely dissolved without particles;

[0032] (2) while the dispersion tank is running at a high speed, the components of the second component are added to the dispersion tank in sequence based on step (1) and stirred for 5 minutes;

[0033] (3) When the dispersion tank is running at a low speed, the components in the third component are added to the dispersion tank in sequence based on (2) and stirred for 5 minutes;

[0034] (4) Pre-stirring the fourth component, taking a new dispersion cylinder container, and sequentially placing the components of the fourth component into the new dispersion cylinder container, and pre-stirring for a few minutes until the fourth component has a slight viscosity;

[0035] (5) When the dispersing tank is running at a low speed, the pre-mixed material obtained in (4) is slowly added to the dispersing tank in (3) and stirred for 30 minutes.

[0036] (6) filtering the stirred material obtained in (5) (100 meshes), obtaining a finished product after filtering, and packaging the finished product.

[0037] Furthermore, the formaldehyde purification performance, bactericidal performance, negative ion generation capacity, mildew resistance and fire resistance of the coating are shown in Figure 2-Figure 6 From the test report shown, it can be seen that the coating has the above functions.

[0038] In order to make the paint and diatom mud coating form a two-in-one breathing wall with longer-lasting function, the present application also provides a formula of diatom mud, and the weight percentage of each component of the diatom mud is: composite alkali powder 22%-30% (film-forming, bonding and high alkalinity antibacterial and sterilization effects), diatomaceous earth 22%-30% (heat insulation, moisture absorption and humidity regulation functions), natural adsorption powder 5%-10% (strong adsorption function, especially for ammonia odor), heavy calcium powder 18%-22% (cooling and hardening), wollastonite needle powder 5%-10% (anti-cracking), natural rubber powder 4%-5% (improving adhesion), natural cellulose 0.5%-0.8% (adjusting viscosity and moisturizing), negative ion powder 0.1%-0.3% (releasing negative ions and antibacterial and sterilization effects), dry powder defoamer 0.1%-0.3% (defoaming effect), dry powder biological mildew inhibitor 0.1%-0.3% (mildew prevention effect). The auxiliary agent in the components is a conventional auxiliary agent, and the natural adsorption powder can be attapulgite, that is, palygorskite powder.

[0039] The preparation method of diatom mud is as follows: the above components are put into a powder mixing tank in turn, the powder mixer is used to mix for 15 minutes, and then part of the mixture at the mouth of the mixing tank is taken out, poured back into the tank and mixed again for 15 minutes to obtain the finished product, which is then packaged.

[0040] The diatom mud produced by the above formula and production method can be subsequently coated with the paint to form a breathing wall after scraping. The combination of the paint and the scraped diatom mud layer is tighter than that of ordinary diatom mud, and also ensures the air permeability and durability of the function of the breathing wall.

[0041] Combination Figure 1As shown, the two-in-one construction process of the diatom mud and the paint includes: S10, wall surface treatment, removing the dust, scum and debris on the wall and cleaning the wall, cleaning the oil stains on the wall surface with a detergent and clean water, and then using a brush or broom to clean the surface dust after drying, and shielding and protecting the objects on the wall surface before subsequent construction;

[0042] S20, preparing diatom mud coating, the diatom mud is sequentially diluted with water, stirred and dispersed to prepare the diatom mud coating, such as diluting water at a ratio of 80% of the diatom mud, and then stirring for 10 minutes using a stirrer, stopping for 10 minutes, and then re-dispersing and stirring;

[0043] Construction Note: The moisture content of the wall is less than 10%, the indoor temperature is not less than 5 degrees Celsius, and the relative humidity is not higher than 85%;

[0044] S30, diatom mud scraping, using the diatom mud paint to scrape the wall surface, and after the scraping is completed, curing, grinding and cleaning are performed to obtain a diatom mud wall surface with a fresh surface, such as: scraping the diatom mud for the second time, with a thickness of 0.5-1.5 mm, scraping the second time after the first scraping is dry, curing for 3-5 days after the scraping is completed until it is completely dry, and then grinding and cleaning the surface to expose the fresh surface;

[0045] S40, the breathing paint is applied, the breathing paint is stirred evenly, the breathing paint is applied by any one of roller coating, brush coating, spray coating and airless spray coating, and the breathing paint is applied on the diatom mud wall with the fresh surface exposed. Generally speaking, the breathing paint is applied twice. During the construction, it is important not to pile up too thickly and to perform repeated rolling to avoid cracking, so as to finally obtain a two-in-one breathing wall.

[0046] Specifically, the two-in-one breathing wall formed contains nano-scale titanium dioxide, negative ion powder and diatomaceous earth, which can obtain a large number of stable pore structures and have active adsorption capacity. It can adsorb volatile organic compounds (VOCs) such as formaldehyde, benzene, ammonia, and air pollutants such as sulfur dioxide and nitrogen monoxide in the air by physical adsorption. At the same time, titanium dioxide performs photocatalysis to decompose the adsorbed formaldehyde and other harmful organic substances. When light irradiates the surface of titanium dioxide, electron-hole pairs are generated. These electron-hole pairs will participate in the redox reaction to decompose organic matter. The photocatalytic reaction does not produce secondary pollutants and is environmentally friendly, thereby improving indoor air quality.

[0047] Furthermore, when ultraviolet rays irradiate the paint surface, titanium dioxide will produce a photocatalytic effect, converting oxygen molecules into active oxygen species with strong oxidizing ability (such as hydroxyl radicals), which can destroy the membrane structure, DNA and intracellular substances of bacteria, thereby killing bacteria. The pH value of diatom mud in the breathing wall and breathing paint is as high as 9-12, which can effectively inhibit the growth and reproduction of bacteria. When bacteria come into contact with the paint surface, the mildew and antibacterial agent can destroy the bacterial cell membrane and cell wall, inhibiting its reproduction and survival.

[0048] After being doped with nano-scale titanium dioxide, the breathing wall has strong resistance to ultraviolet rays, acid and alkali, wind and rain, etc. It can act as an air purifier stably for a long time and continuously purify the air for a long period of time. The negative ions stimulated by the breathing wall can be slowly released for a long time, playing a medical role such as killing germs. The released negative ions purify the air and remove the odor of the air, and also improve or enhance human health. The breathing wall contains mildew inhibitors, which can destroy the cell structure of mold and inhibit its growth and reproduction. Porous materials can absorb and release moisture to keep the wall surface at a suitable humidity. Adjusting the humidity of the wall surface can reduce the growth of mold. At the same time, nano-scale titanium dioxide and negative ions also have the effect of inhibiting mold growth.

[0049] The porous nature of the breathing wall can absorb moisture in the room and adsorb excess moisture in its pore structure, thereby regulating humidity. The porous material can release previously absorbed moisture when the relative humidity is low, increasing the humidity in the room. The microporous structure can achieve indoor and outdoor gas interaction, making the indoor humidity tend to balance with the external humidity, thereby regulating the indoor humidity to a certain extent.

[0050] The diatom mud layer of the breathing wall and the coating layer of the coating have inorganic substances as the main components and have high high temperature resistance. The coating has excellent thermal insulation performance, can reduce the surface temperature and slow down the spread of fire. The fire-resistant thermal insulation layer formed by it can effectively reduce heat conduction, protect the substrate from high temperature burning, and inhibit the spread of fire. The breathing wall has smokeless performance, can prevent the spread of flames and reduce smoke generation, and can effectively prevent harmful smoke from harming the human body and equipment.

[0051] Secondly, the pore structure of the breathing wall has high-efficiency sound absorption and noise reduction capabilities, which can effectively reduce the intensity and transmission efficiency of noise. The pore structure contains a large number of stagnant gas layers, which can act as insulation between the coating and the building surface, effectively reducing heat transfer. In addition, diatomaceous earth and other components themselves have thermal insulation capabilities. The coating can effectively reflect the thermal radiation inside the building, reduce heat absorption and conduction, thereby reducing the heat energy loss of the building, and ultimately reduce the heat loss of the building and the entry of external heat, achieving energy-saving and heat-insulating effects.

[0052] To sum up, the coating made from the above components has good air permeability, bactericidal properties and the ability to absorb and decompose formaldehyde. The manufacturing cost is lower than that of traditional organic breathing coatings. When used with diatom mud coatings, it has a longer-lasting ability to kill bacteria and mildew and absorb and decompose formaldehyde. The breathing wall made by the above two-in-one construction process, the nano titanium dioxide, negative ion powder and diatomaceous earth in the components form a good pore structure with strong air permeability and adsorption capacity, and then absorb formaldehyde in the air and decompose it through the photocatalytic properties of nano titanium dioxide. The high air permeability and the inner diatom mud coating can well release the carbon dioxide and water obtained after the decomposition of formaldehyde, avoiding the accumulation of water in the wall and the breathing wall, and the obtained breathing wall has the functions of formaldehyde removal, sterilization, humidity control, purification, mildew prevention, fire prevention, sound insulation and energy saving, which meet the needs of consumers.

[0053] The above-described embodiments only express one or more implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A highly air-permeable coating for decomposing formaldehyde, characterized in that: The coating is divided into: a first component, a second component, a third component and a fourth component according to the order of addition; The weight percentages of the components of the first component in the coating are: 20%-24% water, 0.1%-0.3% hydroxyethyl cellulose with a viscosity of 15K, 0.1%-0.3% hydroxyethyl cellulose with a viscosity of 3W, and 0.1%-0.3% defoamer; The weight percentages of the components of the second component in the coating are: dispersant 0.3%-0.6%, wetting agent 0.1%-0.3%, titanium dioxide 18%-22%, wollastonite powder 4%-6%, heavy calcium powder 10%-20%, inorganic gel 0.5%-1%, nano titanium dioxide 0.5%-1%; The weight percentages of the components of the third component in the coating are: potassium silicate 20%-32%, silica sol 2%-5%, leveling agent 0.1%-0.3%, defoaming agent 0.1%-0.3%, mildew and antibacterial agent 0.1%-0.5%; The weight percentages of the components of the fourth component in the coating are: 1%-3% water, 0.2%-0.4% hydroxyethyl cellulose with a viscosity of 3W.

2. The highly air-permeable coating for decomposing formaldehyde according to claim 1, characterized in that: The heavy calcium powder is 800 mesh.

3. A two-in-one construction process, characterized in that: The construction process uses the highly air-permeable coating for decomposing formaldehyde as claimed in claim 1 or 2, and the construction process comprises: S10, treating the wall surface, removing the dust, scum and debris on the wall surface and cleaning the wall surface; S20, preparing diatom mud coating, adding water to the diatom mud, stirring and dispersing the diatom mud in sequence to prepare the diatom mud coating; S30, diatom mud scraping, using the diatom mud paint to scrape the wall surface, and after the scraping is completed, curing, polishing and cleaning are performed to obtain a diatom mud wall surface with a fresh surface exposed; S40, the breathing paint is applied, the breathing paint is stirred evenly, the breathing paint is applied by any one of roller coating, brush coating, spray coating and airless spray coating, and the breathing paint is applied on the diatom mud wall with a fresh surface exposed.

4. The construction process according to claim 3, characterized in that: The weight percentages of the components of the diatom mud are: composite alkali powder 22%-30%, diatomaceous earth 22%-30%, natural adsorption powder 5%-10%, heavy calcium powder 18%-22%, wollastonite needle powder 5%-10%, natural rubber powder 4%-5%, natural cellulose 0.5%-0.8%, negative ion powder 0.1%-0.3%, dry powder defoaming agent 0.1%-0.3%, and dry powder biological mildew inhibitor 0.1%-0.3%.

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