CN109535792B - Interior wall environment-friendly coating and preparation method thereof - Google Patents

Interior wall environment-friendly coating and preparation method thereof Download PDF

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CN109535792B
CN109535792B CN201811490687.6A CN201811490687A CN109535792B CN 109535792 B CN109535792 B CN 109535792B CN 201811490687 A CN201811490687 A CN 201811490687A CN 109535792 B CN109535792 B CN 109535792B
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interior wall
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CN109535792A (en
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苏耀恩
蒙杨平
钟玲萍
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Nanning Santong Special Chemical Auxiliary Technique Co ltd
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Nanning Santong Special Chemical Auxiliary Technique Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
    • C09D1/02—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates
    • C09D1/04—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates with organic additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18—Fireproof paints including high temperature resistant paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/20—Diluents or solvents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic

Abstract

The invention belongs to the field of coatings, and particularly relates to an interior wall environment-friendly coating and a preparation method thereof. The interior wall environment-friendly coating is prepared from sodium hexametaphosphate, talcum powder, inorganic thickener, calcium oxide powder, potassium feldspar powder, defoaming powder, filler, inorganic pigment and rho-Al2O3The product is easy to disperse in water and construct, has no crack, no peeling and no powder falling after the product is constructed, and is attractive and meets the environmental protection requirement of people on home decoration materials.

Description

Interior wall environment-friendly coating and preparation method thereof
Technical Field
The invention belongs to the field of coatings, and particularly relates to an interior wall environment-friendly coating and a preparation method thereof.
Background
The coatings produced by coating manufacturers in the industry can be basically summarized in common coatings, and can also be called organic coatings. The organic coating has good decoration, variety diversity and low price, but is a non-renewable resource, the main raw materials of the organic building coating are derived from resources such as coal, petroleum, natural gas and the like, a large amount of byproducts, volatile solvents and residual monomers are generated during processing, so that the organic coating not only causes environmental pollution, but also wastes a large amount of resources and energy, has volatile substances (VOC), and substances such as formaldehyde in the VOC cause harm to the health of people. At present, a large amount of organic matters are used as film forming substances in part of inorganic coatings, on one hand, the weather resistance of the formed film of the organic matters is not strong, the service life of the coating can be shortened, and on the other hand, part of the organic matters contain formaldehyde, and the formaldehyde which is not reacted can be slowly released, so that the health of a human body is harmed. The existing part of inorganic paint also has the problems of poor construction difficulty, easy powder falling, easy cracking, poor water resistance and the like, and the part of inorganic paint in a liquid state is difficult to store under the condition of high temperature. With the increase of income level of people, the requirement for environmental protection of home decoration materials is higher and higher.
Disclosure of Invention
In order to solve the defects of the prior art, one purpose of the invention is to develop an interior wall environment-friendly coating which has excellent performance, easy storage and transportation, water resistance, good weather resistance, mildew and bacteria resistance, A-level fire resistance, no formaldehyde and zero VOC.
The purpose of the invention is realized by the following technical scheme:
an interior wall environment-friendly coating is prepared from the following components in parts by weight:
1-3 parts of sodium hexametaphosphate, 3-5 parts of talcum powder, 3-5 parts of inorganic thickener, 3-5 parts of calcium oxide powder, 5-6 parts of potassium feldspar powder, 0.3-0.5 part of defoaming powder, 40-50 parts of filler, 3-5 parts of inorganic pigment, rho-Al2O315-20 parts of powder, 0.05-0.2 part of sodium ethyl silicate powder, 35-40 parts of water glass and 0.2-0.5 part of latex powder.
Preferably, the interior wall environment-friendly coating is prepared from the following components in parts by weight:
2 parts of sodium hexametaphosphate, 4 parts of talcum powder, 4 parts of inorganic thickener, 4 parts of calcium oxide powder, 5.5 parts of potassium feldspar powder, 0.4 part of defoaming powder, 45 parts of filler, 4 parts of inorganic pigment and rho-Al2O318 parts of powder, 0.1 part of sodium ethyl silicate powder, 37 parts of water glass and 0.3 part of latex powder.
Preferably, the rho-Al2O3The fineness of the powder is 1500-3000 meshes.
Preferably, the water glass is potassium silicate, and the modulus of the dry powder is 3.0.
Preferably, the inorganic thickener is sodium bentonite.
Preferably, the filler is heavy calcium carbonate with the mesh of 1000-2000.
Preferably, the fineness of the talcum powder is 1000-2000 meshes, the fineness of the calcium oxide powder is 800-1250 meshes, and the fineness of the potassium feldspar powder is 1000-2000 meshes.
Preferably, the latex powder is re-dispersible latex powder.
Preferably, the inorganic pigment is TiO2。
According to another object of the present invention, the present invention also provides a method for preparing an interior wall environment-friendly coating material, the method comprising the steps of:
step A: weighing according to the weight ratioSodium hexametaphosphate, p-Al2O3Mixing and stirring the powder, the water glass and the inorganic thickening agent for 10-20 min;
and B: mixing and stirring the product obtained in the step A with calcium oxide powder, defoaming powder, talcum powder, inorganic pigment, filler and potassium feldspar powder for 10-20 min;
and C: b, screening the solid powder obtained in the step B through a vibrating screen of 200 meshes to obtain a semi-finished product;
step D: and D, mixing the product obtained in the step C with latex powder and sodium ethyl silicate powder for 20-40 min to obtain a finished product.
Alumina can have more than 10 kinds of low-temperature metastable Al such as α, β, gamma, zeta, η, theta, kappa, chi, rho and the like due to different crystal structures and the like2O3. Al of the above crystal form structure2O3When heated to over 1200 deg.C, the alloy can be converted into α -Al2O3. Different crystal forms of alumina have great differences in properties such as particle size, purity, shape, and specific surface area. Only rho-Al exists in alumina with different crystal forms2O3Can be hydrated with water at normal temperature, and the hydrated product has gelling property. rho-Al2O3The hydration product of (a) cooperates with the potassium silicate sol as an inorganic gel material, in one aspect rho-Al2O3Under the condition of normal temperature, the rho-Al can be solidified after self-hydration and gelation, and on the other hand2O3The curing of the potassium silicate can be promoted. But except for rho-Al2O3Of other crystal form of Al2O3This effect is not achieved. Al of other crystal forms2O3Most of the crystal forms are used as filling materials of polymers, the strength, whiteness and covering power of the polymers are improved, part of the crystal forms with high specific surface are used for adsorbing materials, part of the crystal forms are applied to the ceramic industry, and the gelling activity of the crystal forms can be reflected under the high-temperature condition. The sodium hexametaphosphate adopted by the invention is not only limited to the dispersion of the powder of the coating, but also can slow down rho-Al2O3Hydration time, prolonging rho-Al2O3And the curing time of the mixed gel of the potassium silicate and the water-based paint improves the construction performance of the paint.
rho-Al added in the interior wall environment-friendly coating2O3The rho-Al in the raw material is an excellent inorganic cementing material with water glass2O3Has synergistic film forming effect with potassium silicate, and can be combined with the potassium silicate to prepare the novel interior wall environment-friendly coating. The environment-friendly interior wall coating prepared by the invention has rho-Al as a main film forming substance2O3And the water glass, wherein the used redispersible latex powder mainly has an auxiliary film forming effect, the dosage is very small, and the product has no adverse effect on fire resistance and weather resistance. When the product is constructed on site, water is added as a solvent, construction can be carried out after stirring and dispersing, the product is easy to disperse in water and construct, no crack exists after the product is constructed, peeling and powder falling do not occur, and the product is attractive and meets the environmental protection requirement of people on home decoration materials.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited to the scope of the examples. These examples are intended to illustrate the invention only and are not intended to limit the scope of the invention. In addition, various modifications may occur to those skilled in the art upon reading the present disclosure, and such equivalent variations are within the scope of the present invention as defined in the appended claims.
Example 1
Taking the following raw materials by weight: 1kg of sodium hexametaphosphate, 3kg of talcum powder, 3kg of inorganic thickening agent, 3kg of calcium oxide powder, 5kg of potassium feldspar powder, 0.3kg of defoaming powder, 40kg of filler, 3kg of inorganic pigment and rho-Al2O315kg of powder, 0.05kg of sodium ethyl silicate powder, 35kg of water glass and 0.2kg of emulsion powder; the rho-Al2O3The powder fineness is 1500 meshes; the water glass is potassium silicate, and the modulus of dry powder is 3.0; the inorganic thickener is sodium bentonite; the filler is 1000 meshes of heavy calcium carbonate; the fineness of the talcum powder is 1000 meshes, the fineness of the calcium oxide powder is 800 meshes, and the fineness of the potassium feldspar powder is 1000 meshes; the latex is redispersible latex powder, and the inorganic pigment is TiO2The said powder is manufactured by the german minling chemical group under the trade name AGITANR P803, model number: p803, effective ofMaterial content: 99 percent.
Step A: sodium hexametaphosphate and rho-Al in the raw materials are mixed2O3Adding the powder, the water glass and the inorganic thickening agent into a high-speed mixer, and mixing and stirring for 10 min;
and B: adding calcium oxide powder, defoaming powder, talcum powder, inorganic pigment, filler and potassium feldspar powder into the mixing stirrer in the step A, and mixing and stirring for 10 min;
and C: b, screening the solid powder in the step B through a vibrating screen of 200 meshes to obtain a semi-finished product;
step D: and D, conveying the semi-finished product in the step C to another high-speed mixer, adding the redispersible latex powder and the sodium ethyl silicate powder, mixing for 20min at a high speed, and packaging to obtain the finished product.
Example 2
Weighing the following raw materials in parts by weight: 2kg of sodium hexametaphosphate, 4kg of talcum powder, 4kg of inorganic thickener, 4kg of calcium oxide powder, 5.5kg of potassium feldspar powder, 0.4kg of defoaming powder, 45kg of filler, 4kg of inorganic pigment and rho-Al2O318kg of powder, 0.1kg of ethyl sodium silicate powder, 37kg of water glass and 0.3kg of emulsion powder;
the rho-Al2O3The powder fineness is 2000 meshes; the water glass is potassium silicate, and the modulus of dry powder is 3.0; the inorganic thickener is sodium bentonite; the filler is 1250-mesh heavy calcium carbonate; the fineness of the talcum powder is 1250 meshes, the fineness of the calcium oxide powder is 1000 meshes, and the fineness of the potassium feldspar powder is 1250 meshes; the latex is redispersible latex powder, and the inorganic pigment is TiO2The said powder is manufactured by the german minling chemical group under the trade name AGITANR P803, model number: p803, which contains the following active substance content: 99 percent.
Step A: sodium hexametaphosphate and rho-Al in the raw materials are mixed2O3Adding the powder, the water glass and the inorganic thickening agent into a high-speed mixer, and mixing and stirring for 15 min;
and B: adding calcium oxide powder, defoaming powder, talcum powder, inorganic pigment, filler and potassium feldspar powder into the mixing stirrer in the step A, and mixing and stirring for 15 min;
and C: b, screening the solid powder in the step B through a vibrating screen of 200 meshes to obtain a semi-finished product;
step D: and D, conveying the semi-finished product in the step C to another high-speed mixer, adding the redispersible latex powder and the sodium ethyl silicate powder, mixing for 30min at a high speed, and packaging to obtain the finished product.
Example 3
Weighing the following raw materials in parts by weight: 3kg of sodium hexametaphosphate, 5kg of talcum powder, 5kg of inorganic thickening agent, 5kg of calcium oxide powder, 6kg of potassium feldspar powder, 0.5kg of defoaming powder, 50kg of filler, 5kg of inorganic pigment and rho-Al2O320kg of powder, 0.2kg of ethyl sodium silicate powder, 40kg of water glass and 0.5kg of emulsion powder;
the rho-Al2O3The powder fineness is 3000 meshes; the water glass is potassium silicate, and the modulus of dry powder is 3.0; the inorganic thickener is sodium bentonite; the filler is ground calcium carbonate of 2000 meshes; the fineness of the talcum powder is 2000 meshes, the fineness of the calcium oxide powder is 2000 meshes, and the fineness of the potassium feldspar powder is 2000 meshes; the latex is redispersible latex powder, and the inorganic pigment is TiO2The said powder is manufactured by the german minling chemical group under the trade name AGITANR P803, model number: p803, which contains the following active substance content: 99 percent.
Step A: sodium hexametaphosphate and rho-Al in the raw materials are mixed2O3Adding the powder, the water glass and the inorganic thickening agent into a high-speed mixer, and mixing and stirring for 20 min;
and B: adding calcium oxide powder, defoaming powder, talcum powder, inorganic pigment, filler and potassium feldspar powder into the mixing stirrer in the step A, and mixing and stirring for 20 min;
and C: b, screening the solid powder in the step B through a vibrating screen of 200 meshes to obtain a semi-finished product;
step D: and D, conveying the semi-finished product in the step C to another high-speed mixer, adding the redispersible latex powder and the sodium ethyl silicate powder, mixing for 40min at a high speed, and packaging to obtain the finished product.
Comparative example 1
Based on example 1, the same was usedα -Al by weight2O3Replacing the rho-Al in the formulation of example 12O3The other components and the dosage in the formula are kept unchanged, and in addition, the preparation method and the process parameters of the new formula are kept unchanged.
Comparative example 2
Based on example 1, β -Al was used in the same amount by weight2O3Replacing the rho-Al in the formulation of example 12O3The other components and the dosage in the formula are kept unchanged, and in addition, the preparation method and the process parameters of the new formula are kept unchanged.
Comparative example 3
Based on example 1, the same weight of gamma-Al is used2O3Replacing the rho-Al in the formulation of example 12O3The other components and the dosage in the formula are kept unchanged, and in addition, the preparation method and the process parameters of the new formula are kept unchanged.
Comparative example 4
Based on example 1, with the same weight of-Al2O3Replacing the rho-Al in the formulation of example 12O3The other components and the dosage in the formula are kept unchanged, and in addition, the preparation method and the process parameters of the new formula are kept unchanged.
Comparative example 5
Based on example 2, with the same weight of-Al2O3Substituted for p-Al in the formulation of example 22O3The other components and the dosage in the formula are kept unchanged, and in addition, the preparation method and the process parameters of the new formula are kept unchanged.
Comparative example 6
Based on example 2, the same weight of ζ -Al is used2O3Substituted for p-Al in the formulation of example 22O3The other components and the dosage in the formula are kept unchanged, and in addition, the preparation method and the process parameters of the new formula are kept unchanged.
Comparative example 7
Based on example 2, η -Al was used in the same amount by weight2O3Alternative embodimentsExample 2 formulation of p-Al2O3The other components and the dosage in the formula are kept unchanged, and in addition, the preparation method and the process parameters of the new formula are kept unchanged.
Comparative example 8
Based on example 3, the same weight of theta-Al is used2O3Substituted for p-Al in the formulation of example 32O3The other components and the dosage in the formula are kept unchanged, and in addition, the preparation method and the process parameters of the new formula are kept unchanged.
Comparative example 9
Based on example 3, with the same weight of kappa-Al2O3Substituted for p-Al in the formulation of example 32O3The other components and the dosage in the formula are kept unchanged, and in addition, the preparation method and the process parameters of the new formula are kept unchanged.
Comparative example 10
Based on example 3, the same weight of chi-Al is used2O3Substituted for p-Al in the formulation of example 32O3The other components and the dosage in the formula are kept unchanged, and in addition, the preparation method and the process parameters of the new formula are kept unchanged.
Comparative example 11
On the basis of the example 1, the potassium silicate in the formula of the example 1 is replaced by the same weight of sodium silicate, the dry powder modulus of the potassium silicate and the dry powder modulus of the sodium silicate are the same, the rest components and the use amount in the formula are kept unchanged, and in addition, the preparation method and the process parameters of the new formula are kept unchanged.
Comparative example 12
On the basis of the formula of the embodiment 2, the sodium hexametaphosphate in the formula of the embodiment 2 is replaced by the same weight of sodium orthophosphate, the other components and the dosage in the formula are kept unchanged, and in addition, the preparation method and the process parameters of the new formula are kept unchanged.
Comparative example 13
0.5kg of rho-Al is taken2O3Adding 0.5L water into the powder at normal temperature, rapidly stirring for 30-50S, detecting the viscosity change of the slurry by a viscometer (NDJ-8S), and detecting every minuteMeasuring the viscosity value of the slurry until 100 minutes, drawing a time-viscosity change value according to the obtained data, recording the corresponding time when the maximum value of the viscosity (55Pa · s) is recorded, and calculating the time as h1, wherein h1 is 42 min;
0.5kg of rho-Al is taken2O3Powder, 0.05kg of sodium hexametaphosphate and 0.5L of water are added at normal temperature, the mixture is rapidly stirred for 30 to 50 seconds, the viscosity change of the slurry is detected by a viscometer (NDJ-8S), the viscosity value of the slurry is detected every other minute until 100 minutes, the time-viscosity change value is drawn according to the obtained data, the corresponding time when the maximum viscosity value (62Pa S) is recorded and is counted as h2, and h2 is 81 min;
ρ-Al2O3when hydration reaction is carried out, the obtained product has gel property, and rho-Al can be reflected laterally by detecting the viscosity value of the slurry2O3Hydration degree, when the viscosity value of the slurry reaches the maximum value, rho-Al2O3After the hydration reaction is finished, the slurry begins to lose fluidity and begins to solidify, and the comparison shows that the sodium hexametaphosphate in the invention can slow down rho-Al2O3The hydration time is prolonged, thereby further prolonging the construction time.
Comparative example 14
0.5kg of rho-Al is taken2O3Adding 0.35kg of water into the powder at normal temperature, stirring the powder by using an electric stirrer, constructing putty wall surfaces and cement wall surfaces at room temperature, and detecting rho-Al2O3Powder set time and noted H1;
taking 0.5kg of potassium silicate powder, adding 0.35kg of water at normal temperature, stirring by using an electric stirrer, constructing on a putty wall surface and a cement wall surface at room temperature, detecting the curing time of the potassium silicate powder and recording as H2;
0.5kg of rho-Al is taken2O3Adding 0.7kg of water into the powder and 0.5kg of potassium silicate powder at normal temperature, stirring by using an electric stirrer, constructing on a putty wall surface and a cement wall surface at room temperature, and detecting the curing time of the mixture and marking as H3;
0.5kg of rho-Al is taken2O3Powder, potassium silicate powder 0.5kg and sodium hexametaphosphate 0.05kg, adding water 1.05kg at room temperature to obtain a mixtureAfter stirring with an electric stirrer, the construction was carried out on putty walls and cement walls at room temperature, and the curing time of the mixture was measured and recorded as H4, and the results obtained are shown in table 3 below.
The environment-friendly interior wall coating prepared in the embodiments 1 to 3 and the comparative examples 1 to 12 is mixed with water at room temperature, the water amount is 70 percent of the weight of the coating formula, after the environment-friendly interior wall coating is stirred by an electric stirrer, construction is carried out on putty wall surfaces and cement wall surfaces at room temperature, and the technical performance indexes of the wall bodies are shown in the following tables 1 and 2:
table 1 wall technical properties
Figure BDA0001895593030000081
Table 1 shows that the product obtained by the invention is easy to construct, has no crack, no peeling and no powder falling after the product is constructed, and meets the requirements of water resistance, mold resistance, bonding strength and the like.
TABLE 2 paint adhesion Strength
Figure BDA0001895593030000082
Table 2 shows that in many of the products of the alumina crystal form, rho-Al is contained2O3The paint has high bonding strength, the wall surface after construction does not fall off powder, and the potassium silicate powder and the sodium hexametaphosphate can further enhance the bonding strength of the paint and improve the construction performance.
In comparative example 14,. rho. -Al2O3The curing times required for the powders, potassium silicate powders, alone and in combination are shown in table 3 below:
TABLE 3 curing time of the ingredients contained in the coating
H1 H2 H4 H5
Curing time (surface dry)/min 15 480 30 97
Table 3 shows that potassium silicate is specific to rho-Al2O3The powder curing time is assisted, and sodium hexametaphosphate plays a role in rho-Al2O3The setting time of the powder, potassium silicate powder, is also helpful.
The interior wall environment-friendly coating prepared in the embodiments 1 to 3 of the invention is detected according to the national standard method, and the toxic and harmful substances to be controlled are not detected, and the specific results are shown in the following table 4:
TABLE 4 detection results of toxic and harmful substances
Figure BDA0001895593030000091
Table 4 shows that the components contained in the coating of the invention are formaldehyde-free and VOC-free, and meet the environmental protection requirements.

Claims (9)

1. The interior wall environment-friendly coating is characterized by being prepared from the following components in parts by weight:
1-3 parts of sodium hexametaphosphate, 3-5 parts of talcum powder, 3-5 parts of inorganic thickener, 3-5 parts of calcium oxide powder, 5-6 parts of potassium feldspar powder, 0.3-0.5 part of defoaming powder, 40-50 parts of filler, 3-5 parts of inorganic pigment, rho-Al2O315-20 parts of powder and sodium ethyl silicate powder0.05-0.2 part of sodium silicate, 35-40 parts of water glass and 0.2-0.5 part of latex powder, wherein the water glass is potassium silicate, and the modulus of the dry powder is 3.0.
2. The interior wall environment-friendly paint as claimed in claim 1, which is prepared from the following components in parts by weight:
2 parts of sodium hexametaphosphate, 4 parts of talcum powder, 4 parts of inorganic thickener, 4 parts of calcium oxide powder, 5.5 parts of potassium feldspar powder, 0.4 part of defoaming powder, 45 parts of filler, 4 parts of inorganic pigment and rho-Al2O318 parts of powder, 0.1 part of sodium ethyl silicate powder, 37 parts of water glass and 0.3 part of latex powder.
3. The interior wall environment-friendly paint according to claim 1 or 2, wherein the rho-Al is selected from the group consisting of2O3The fineness of the powder is 1500-3000 meshes.
4. The interior wall environment-friendly paint as claimed in claim 1 or 2, wherein the inorganic thickener is sodium bentonite.
5. The interior wall environment-friendly coating material as claimed in claim 1 or 2, wherein the filler is heavy calcium carbonate of 1000-2000 meshes.
6. The interior wall environment-friendly coating material according to claim 1 or 2, wherein the fineness of the talcum powder is 1000-2000 meshes, the fineness of the calcium oxide powder is 800-1250 meshes, and the fineness of the potassium feldspar powder is 1000-2000 meshes.
7. The interior wall environment-friendly paint according to claim 1 or 2, wherein the latex powder is re-dispersible latex powder.
8. The interior wall environment-friendly paint according to claim 1 or 2, wherein the inorganic pigment is TiO2。
9. The method for preparing the interior wall environment-friendly paint as claimed in any one of claims 1 to 8, which is characterized by comprising the following steps:
step A: weighing sodium hexametaphosphate and rho-Al according to the weight proportion2O3Mixing and stirring the powder, the water glass and the inorganic thickening agent for 10-20 min;
and B: mixing and stirring the product obtained in the step A with calcium oxide powder, defoaming powder, talcum powder, inorganic pigment, filler and potassium feldspar powder for 10-20 min;
and C: b, screening the solid powder obtained in the step B through a vibrating screen of 200 meshes to obtain a semi-finished product;
step D: and D, mixing the product obtained in the step C with latex powder and sodium ethyl silicate powder for 20-40 min to obtain a finished product.
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