CN113185884A - Low-cost environment-friendly waterproof building coating and preparation method thereof - Google Patents
Low-cost environment-friendly waterproof building coating and preparation method thereof Download PDFInfo
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- CN113185884A CN113185884A CN202110689573.XA CN202110689573A CN113185884A CN 113185884 A CN113185884 A CN 113185884A CN 202110689573 A CN202110689573 A CN 202110689573A CN 113185884 A CN113185884 A CN 113185884A
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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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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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
- 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
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K2003/2241—Titanium dioxide
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Abstract
The invention discloses a low-cost environment-friendly waterproof building coating and a preparation method thereof, and relates to the technical field of building coating preparation, wherein the low-cost environment-friendly waterproof building coating mainly comprises the following raw materials in parts by weight: the method comprises the steps of modifying kaolin by adopting the method, so that the adsorption pertinence is enhanced, indoor formaldehyde can be actively adsorbed, and the adsorption efficiency is improved; and the formaldehyde adsorption capacity of the modified kaolin is greatly increased compared with that before the modified kaolin is modified. The modified kaolin added by 1-5% can play an excellent formaldehyde adsorption effect, can avoid coating cracking, and has the advantages of excellent corrosion resistance, good aging resistance, strong decoration and good durability.
Description
Technical Field
The invention relates to the technical field of building coating preparation, in particular to a low-cost environment-friendly waterproof building coating and a preparation method thereof.
Background
The coating is a material which can be coated on the surface of an object to be coated and can form a firmly attached continuous film, and the material can be coated on the surface of the object by different construction processes to form a firmly adhered continuous solid film with certain strength. The film thus formed is generally called a coating film, also called a paint film or a coating.
The architectural coating has a decorative function, a protective function, and a habitability improvement function. The specific weight of each function is different depending on the purpose of use. The decoration function is a function of enhancing the appearance value of a building by beautifying the building. Mainly comprises the conceptual design of plane color, pattern and gloss and the conceptual design of three-dimensional patterns. However, the coating can be fully developed only by matching with the shape of the building and the size and shape of the base material, and in recent years, the architectural coating is developed towards the aspects of environmental protection, wear resistance, heat insulation, safety, super-long service life and the like. The existing waterproof paint has various types, and the existing waterproof paint has complex construction operation and poor performance; some waterproof effects are poor, the weather resistance is poor, and some waterproof effects are affected due to the fact that the materials are required to be mixed on site, the construction is troublesome, and the performance is reduced due to inaccurate materials.
In recent years, with the increasingly strict requirements of people on building materials and national environmental protection policies, building coatings with high waterproof and crack-resistant performances appear on the market, but the current building coatings still have the problem of low waterproof and crack-resistant performances.
Disclosure of Invention
The invention aims to provide a low-cost environment-friendly waterproof building coating and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a low-cost environment-friendly waterproof building coating mainly comprises the following raw materials in parts by weight:
200 parts of acrylate emulsion 160-one, 50-70 parts of active filler, 40-60 parts of deionized water, 10-18 parts of thickening agent, 2-5 parts of dispersing agent, 1-4 parts of fumed silica, 2-6 parts of defoaming agent, 2-6 parts of antioxidant, 12-20 parts of modified kaolin, 10-15 parts of modified sepiolite, 2-5 parts of light stabilizer, 6-12 parts of modified titanium dioxide and 3-7 parts of coupling agent.
As a further scheme of the invention: the low-cost environment-friendly waterproof building coating mainly comprises the following raw materials in parts by weight:
190 parts of acrylate emulsion 170-containing materials, 55-65 parts of active filler, 45-55 parts of deionized water, 12-16 parts of thickening agent, 3-4 parts of dispersing agent, 2-3 parts of fumed silica, 3-5 parts of defoaming agent, 3-5 parts of antioxidant, 14-18 parts of modified kaolin, 12-14 parts of modified sepiolite, 3-4 parts of light stabilizer, 8-10 parts of modified titanium dioxide and 4-6 parts of coupling agent.
As a still further scheme of the invention: the low-cost environment-friendly waterproof building coating mainly comprises the following raw materials in parts by weight:
180 parts of acrylate emulsion, 60 parts of active filler, 50 parts of deionized water, 14 parts of thickening agent, 4 parts of dispersing agent, 2 parts of fumed silica, 4 parts of defoaming agent, 4 parts of antioxidant, 16 parts of modified kaolin, 13 parts of modified sepiolite, 4 parts of light stabilizer, 9 parts of modified titanium dioxide and 5 parts of coupling agent.
As a still further scheme of the invention: the active filler is composed of palygorskite, vanadium pentoxide and polyaluminium chloride in a combination ratio of 1:1: 2.
As a still further scheme of the invention: the thickening agent is composed of one or more of hydroxypropyl starch, carboxymethyl starch and hydroxypropyl methyl cellulose.
As a still further scheme of the invention: the primary particle size of the fumed silica is 7-40 nm, and the specific surface area is 175-225 m/g.
As a still further scheme of the invention: the defoaming agent is an organic silicon defoaming agent.
As a still further scheme of the invention: the antioxidant is composed of one or two of phenols and phosphorous acid.
As a still further scheme of the invention: the preparation method of the modified kaolin comprises the following steps: mixing 20g of kaolin with an equal amount of tartaric acid; burning at 580-620 deg.C for 1.2-1.4h, and cooling; placing in a 300ml beaker, adding 150ml deionized water and 50ml hexadecyl trimethyl ammonium bromide solution with the concentration of 20mmol/L, and magnetically stirring for 3.5-4.5 h; and washing the zeolite with deionized water, and naturally drying to obtain the modified kaolin.
As a still further scheme of the invention: the preparation method of the modified sepiolite comprises the following steps: preparing a sepiolite solution, adding sodium borohydride and chloroplatinic acid, carrying out ultrasonic treatment for 12-14 min at room temperature, drying, and roasting at 380-400 ℃ for 16-24 min to obtain the modified sepiolite.
As a still further scheme of the invention: the preparation method of the modified titanium dioxide comprises the following steps: weighing 2mL of N, N-dimethylformamide and 60mL of deionized water, mixing, magnetically stirring at normal temperature for 20min, adding 1.8g of titanium dioxide powder, continuously magnetically stirring at normal temperature for 25min, transferring the mixed solution into a hydrothermal reaction kettle, reacting at 150 ℃ for 18h, fully cooling, washing the product with alcohol and water, drying, and grinding to obtain the modified titanium dioxide.
As a still further scheme of the invention: the light stabilizer is composed of one or more of o-hydroxybenzophenone, salicylate, triazine and substituted acrylonitrile.
As a still further scheme of the invention: the coupling agent is composed of one or more of vinyl triethoxysilane, gamma-aminopropyl triethoxysilane, and vinyl trimethoxysilane.
A preparation method of a low-cost environment-friendly waterproof building coating comprises the following steps:
1) weighing 200 parts of acrylate emulsion 160-one, 50-70 parts of active filler, 40-60 parts of deionized water, 10-18 parts of thickening agent, 2-5 parts of dispersing agent, 1-4 parts of fumed silica, 2-6 parts of defoaming agent, 2-6 parts of antioxidant, 12-20 parts of modified kaolin, 10-15 parts of modified sepiolite, 2-5 parts of light stabilizer, 6-12 parts of modified titanium dioxide and 3-7 parts of coupling agent in sequence according to the weight parts;
2) adding deionized water into a stirring tank at the rotation speed of 500-900r/min, and then respectively adding the active filler, the fumed silica and the modified titanium dioxide into the stirring tank and stirring the mixture at a low speed for 30-40 min;
3) respectively adding acrylate emulsion, a thickening agent, a dispersing agent, modified kaolin and modified sepiolite according to the formula design amount, and stirring at a high speed of 1200-1500r/min for 35-45 min;
4) adding the defoaming agent and the antioxidant according to the formula dosage, and continuously stirring at a high speed for 50-60 min;
5) adding the light stabilizer and the coupling agent according to the formula dosage, and continuously stirring at high speed for 60-80min to obtain the low-cost environment-friendly waterproof building coating.
Compared with the prior art, the invention has the beneficial effects that:
1) the sepiolite is a pure natural, nontoxic, tasteless, asbestos-free and radioactive element-free hydrated magnesium silicate clay mineral, has the largest specific surface area and a unique content pore channel structure in nonmetal minerals, can adsorb external toxic substances such as formaldehyde, benzene, ammonia and the like, and can absorb formaldehyde generated in the air; the chloroplatinic acid is reduced by sodium borohydride, then nano platinum is loaded in the sepiolite, the sodium borohydride, the chloroplatinic acid and the sepiolite can form a Pt/sepiolite composite material with strong adsorption capacity, formaldehyde can be catalytically oxidized at room temperature, and the effect of adsorbing and degrading formaldehyde is achieved;
2) according to the method, the kaolin is modified by adopting the method, the adsorption pertinence is enhanced, indoor formaldehyde can be actively adsorbed, and the adsorption efficiency is improved; and the formaldehyde adsorption capacity of the modified kaolin is greatly increased compared with that before the modified kaolin is modified. The modified kaolin added by 1-5% can play an excellent formaldehyde adsorption effect and can avoid the cracking of the coating;
3) the preparation process is simple and the production cost is low; after the waterproof environment-friendly coating disclosed by the invention is used, the waterproof performance can be effectively improved, the waterproof environment-friendly coating has unique waterproofness, high elasticity and integrity, a coating film is continuous without any seam and is leakage-resistant, the coating film has good cohesiveness to various base materials of a building, is not easy to peel, and has the advantages of excellent anticorrosion effect, good anti-aging effect, strong decoration, good durability and the like.
Detailed Description
According to the method, the kaolin is modified by adopting the method, the adsorption pertinence is enhanced, indoor formaldehyde can be actively adsorbed, and the adsorption efficiency is improved; and the formaldehyde adsorption capacity of the modified kaolin is greatly increased compared with that before the modified kaolin is modified. The modified kaolin added by 1-5% can play an excellent formaldehyde adsorption effect, can avoid coating cracking, and has the advantages of excellent corrosion resistance, good aging resistance, strong decoration and good durability.
The technical solution of the present invention will be described in further detail with reference to specific embodiments.
Example 1
160 parts of acrylate emulsion, 50 parts of active filler, 40 parts of deionized water, 10 parts of thickening agent, 2 parts of dispersing agent, 1 part of fumed silica, 2 parts of defoaming agent, 2 parts of antioxidant, 12 parts of modified kaolin, 10 parts of modified sepiolite, 2 parts of light stabilizer, 6 parts of modified titanium dioxide and 3 parts of coupling agent are sequentially weighed according to the weight parts, the active filler consists of palygorskite, vanadium pentoxide and polyaluminum chloride in a combination ratio of 1:1:2, the thickening agent consists of hydroxypropyl starch, carboxymethyl starch and hydroxypropyl methyl cellulose in a combination ratio of 1:1:1, the primary particle size of the fumed silica is 7-40 nm, the specific surface area is 175-225 m/g, the defoaming agent is an organic silicon defoaming agent, the antioxidant is phenol, and the preparation method of the modified kaolin is as follows: mixing 20g of kaolin with an equal amount of tartaric acid; burning at 580-620 ℃ for 1.2h, and cooling; placing in a 300ml beaker, adding 150ml deionized water and 50ml hexadecyl trimethyl ammonium bromide solution with the concentration of 20mmol/L, and magnetically stirring for 3.5 h; washing zeolite with deionized water, and naturally drying to obtain modified kaolin, wherein the preparation method of the modified sepiolite comprises the following steps: preparing a sepiolite solution, adding sodium borohydride and chloroplatinic acid, carrying out ultrasonic treatment for 12min at room temperature, drying, and roasting at 380-400 ℃ for 16min to obtain modified sepiolite, wherein the preparation method of the modified titanium dioxide comprises the following steps: weighing 2mL of N, N-dimethylformamide and 60mL of deionized water, mixing, magnetically stirring at normal temperature for 20min, adding 1.8g of titanium dioxide powder, continuously magnetically stirring at normal temperature for 25min, transferring the mixed solution into a hydrothermal reaction kettle, reacting at 150 ℃ for 18h, fully cooling, washing the product with alcohol and water, drying and grinding to obtain the modified titanium dioxide, wherein the light stabilizer consists of o-hydroxybenzophenone, salicylate, triazine and substituted acrylonitrile in a combination ratio of 1:2:1:3, the coupling agent consists of vinyltriethoxysilane, gamma-aminopropyltriethoxysilane and vinyltrimethoxysilane in a combination ratio of: 2:1: 2; adding deionized water into a stirring tank at the rotating speed of 500r/min, and then respectively adding the active filler, the fumed silica and the modified titanium dioxide into the stirring tank and stirring the mixture at a low speed for 30 min; respectively adding acrylate emulsion, a thickening agent, a dispersing agent, modified kaolin and modified sepiolite according to the formula design dosage, and stirring at a high speed of 1200r/min for 35 min; adding the defoaming agent and the antioxidant according to the formula dosage, and continuously stirring at a high speed for 50 min; adding the light stabilizer and the coupling agent according to the formula dosage, and continuously stirring at high speed for 60min to obtain the low-cost environment-friendly waterproof building coating.
Example 2
170 parts of acrylate emulsion, 52 parts of active filler, 42 parts of deionized water, 12 parts of thickener, 3 parts of dispersant, 2 parts of fumed silica, 3 parts of defoaming agent, 3 parts of antioxidant, 14 parts of modified kaolin, 11 parts of modified sepiolite, 3 parts of light stabilizer, 7 parts of modified titanium dioxide and 4 parts of coupling agent are sequentially weighed according to the weight parts, the active filler consists of palygorskite, vanadium pentoxide and polyaluminum chloride in a combination ratio of 1:1:2, the thickener consists of hydroxypropyl starch, carboxymethyl starch and hydroxypropyl methyl cellulose in a combination ratio of 1:2:1, the primary particle size of the fumed silica is 7-40 nm, the specific surface area is 175-225 m/g, the defoaming agent is an organic silicon defoaming agent, the antioxidant is phosphorous acid, and the preparation method of the modified kaolin is as follows: mixing 20g of kaolin with an equal amount of tartaric acid; burning at 580-620 ℃ for 1.3h, and cooling; placing in a 300ml beaker, adding 150ml deionized water and 50ml hexadecyl trimethyl ammonium bromide solution with the concentration of 20mmol/L, and magnetically stirring for 4.2 h; washing zeolite with deionized water, and naturally drying to obtain modified kaolin, wherein the preparation method of the modified sepiolite comprises the following steps: preparing a sepiolite solution, adding sodium borohydride and chloroplatinic acid, carrying out ultrasonic treatment for 13min at room temperature, drying, and roasting at 380-400 ℃ for 20min to obtain modified sepiolite, wherein the preparation method of the modified titanium dioxide comprises the following steps: weighing 2mL of N, N-dimethylformamide and 60mL of deionized water, mixing, magnetically stirring at normal temperature for 20min, adding 1.8g of titanium dioxide powder, continuously magnetically stirring at normal temperature for 25min, transferring the mixed solution into a hydrothermal reaction kettle, reacting at 150 ℃ for 18h, fully cooling, washing the product with alcohol and water, drying and grinding to obtain the modified titanium dioxide, wherein the light stabilizer consists of o-hydroxybenzophenone, salicylate, triazine and substituted acrylonitrile in a combination ratio of 1:2:1:3, the coupling agent consists of vinyltriethoxysilane, gamma-aminopropyltriethoxysilane and vinyltrimethoxysilane in a combination ratio of: 2:1: 2; adding deionized water into a stirring tank at the rotating speed of 700r/min, and then respectively adding the active filler, the fumed silica and the modified titanium dioxide into the stirring tank and stirring the mixture at a low speed for 32 min; respectively adding acrylate emulsion, a thickening agent, a dispersing agent, modified kaolin and modified sepiolite according to the formula design dosage, and stirring at a high speed of 1300r/min for 38 min; adding the defoaming agent and the antioxidant according to the formula dosage, and continuously stirring at high speed for 52 min; adding the light stabilizer and the coupling agent according to the formula dosage, and continuously stirring at high speed for 65min to obtain the low-cost environment-friendly waterproof building coating.
Example 3
Weighing 180 parts of acrylate emulsion, 55 parts of active filler, 45 parts of deionized water, 14 parts of thickener, 4 parts of dispersant, 3 parts of fumed silica, 4 parts of defoaming agent, 4 parts of antioxidant, 15 parts of modified kaolin, 12 parts of modified sepiolite, 4 parts of light stabilizer, 8 parts of modified titanium dioxide and 5 parts of coupling agent in sequence according to the weight parts, wherein the active filler consists of palygorskite, vanadium pentoxide and polyaluminum chloride in a combination ratio of 1:1:2, the thickener consists of hydroxypropyl starch, carboxymethyl starch and hydroxypropyl methyl cellulose in a combination ratio of 1:1:1, the primary particle size of the fumed silica is 7-40 nm, the specific surface area is 175-225 m/g, the defoaming agent is an organic silicon defoaming agent, the antioxidant is phenol, and the preparation method of the modified kaolin is as follows: mixing 20g of kaolin with an equal amount of tartaric acid; burning at 580-620 ℃ for 1.3h, and cooling; placing in a 300ml beaker, adding 150ml deionized water and 50ml hexadecyl trimethyl ammonium bromide solution with the concentration of 20mmol/L, and magnetically stirring for 4 hours; washing zeolite with deionized water, and naturally drying to obtain modified kaolin, wherein the preparation method of the modified sepiolite comprises the following steps: preparing a sepiolite solution, adding sodium borohydride and chloroplatinic acid, carrying out ultrasonic treatment for 13min at room temperature, drying, and roasting at 380-400 ℃ for 18min to obtain modified sepiolite, wherein the preparation method of the modified titanium dioxide comprises the following steps: weighing 2mL of N, N-dimethylformamide and 60mL of deionized water, mixing, magnetically stirring at normal temperature for 20min, adding 1.8g of titanium dioxide powder, continuously magnetically stirring at normal temperature for 25min, transferring the mixed solution into a hydrothermal reaction kettle, reacting at 150 ℃ for 18h, fully cooling, washing the product with alcohol and water, drying and grinding to obtain the modified titanium dioxide, wherein the light stabilizer consists of o-hydroxybenzophenone, salicylate, triazine and substituted acrylonitrile in a combination ratio of 1:2:1:3, the coupling agent consists of vinyltriethoxysilane, gamma-aminopropyltriethoxysilane and vinyltrimethoxysilane in a combination ratio of: 2:1: 2; adding deionized water into a stirring tank at the rotating speed of 600r/min, and then respectively adding the active filler, the fumed silica and the modified titanium dioxide into the stirring tank and stirring the mixture at a low speed for 32 min; respectively adding acrylate emulsion, a thickening agent, a dispersing agent, modified kaolin and modified sepiolite according to the formula design dosage, and stirring at a high speed of 1400r/min for 40 min; adding the defoaming agent and the antioxidant according to the formula dosage, and continuously stirring at a high speed for 54 min; adding the light stabilizer and the coupling agent according to the formula dosage, and continuously stirring at high speed for 65min to obtain the low-cost environment-friendly waterproof building coating.
Example 4
Weighing 180 parts of acrylate emulsion, 60 parts of active filler, 50 parts of deionized water, 14 parts of thickener, 4 parts of dispersant, 2 parts of fumed silica, 4 parts of defoaming agent, 4 parts of antioxidant, 16 parts of modified kaolin, 13 parts of modified sepiolite, 4 parts of light stabilizer, 9 parts of modified titanium dioxide and 5 parts of coupling agent in sequence according to the weight parts, wherein the active filler consists of palygorskite, vanadium pentoxide and polyaluminum chloride in a combination ratio of 1:1:2, the thickener consists of hydroxypropyl starch, carboxymethyl starch and hydroxypropyl methyl cellulose in a combination ratio of 2:1:2, the primary particle size of the fumed silica is 7-40 nm, the specific surface area is 175-225 m/g, the defoaming agent is an organic silicon defoaming agent, the antioxidant is phenol, and the preparation method of the modified kaolin is as follows: mixing 20g of kaolin with an equal amount of tartaric acid; burning at 580-620 ℃ for 1.2h, and cooling; placing in a 300ml beaker, adding 150ml deionized water and 50ml hexadecyl trimethyl ammonium bromide solution with the concentration of 20mmol/L, and magnetically stirring for 4.2 h; washing zeolite with deionized water, and naturally drying to obtain modified kaolin, wherein the preparation method of the modified sepiolite comprises the following steps: preparing a sepiolite solution, adding sodium borohydride and chloroplatinic acid, carrying out ultrasonic treatment for 12min at room temperature, drying, and roasting at 380-400 ℃ for 20min to obtain modified sepiolite, wherein the preparation method of the modified titanium dioxide comprises the following steps: weighing 2mL of N, N-dimethylformamide and 60mL of deionized water, mixing, magnetically stirring at normal temperature for 20min, adding 1.8g of titanium dioxide powder, continuously magnetically stirring at normal temperature for 25min, transferring the mixed solution into a hydrothermal reaction kettle, reacting at 150 ℃ for 18h, fully cooling, washing the product with alcohol and water, drying and grinding to obtain the modified titanium dioxide, wherein the light stabilizer consists of o-hydroxybenzophenone, salicylate, triazine and substituted acrylonitrile in a combination ratio of 1:2:1:1, the coupling agent consists of vinyltriethoxysilane, gamma-aminopropyltriethoxysilane and vinyltrimethoxysilane in a combination ratio of: 1:1: 2; adding deionized water into a stirring tank at the rotating speed of 700r/min, and then respectively adding the active filler, the fumed silica and the modified titanium dioxide into the stirring tank and stirring the mixture at a low speed for 35 min; respectively adding the acrylate emulsion, the thickening agent, the dispersing agent, the modified kaolin and the modified sepiolite according to the formula design dosage, and stirring at a high speed of 1200r/min for 42 min; adding the defoaming agent and the antioxidant according to the formula dosage, and continuously stirring at a high speed for 56 min; adding the light stabilizer and the coupling agent according to the formula dosage, and continuously stirring at a high speed for 70min to obtain the low-cost environment-friendly waterproof building coating.
Example 5
200 parts of acrylate emulsion, 70 parts of active filler, 60 parts of deionized water, 18 parts of thickening agent, 5 parts of dispersing agent, 4 parts of fumed silica, 6 parts of defoaming agent, 6 parts of antioxidant, 20 parts of modified kaolin, 15 parts of modified sepiolite, 5 parts of light stabilizer, 12 parts of modified titanium dioxide and 7 parts of coupling agent are sequentially weighed according to the weight parts, the active filler consists of palygorskite, vanadium pentoxide and polyaluminum chloride in a combination ratio of 1:1:2, the thickening agent consists of hydroxypropyl starch, carboxymethyl starch and hydroxypropyl methyl cellulose in a combination ratio of 2:1:2, the primary particle size of the fumed silica is 7-40 nm, the specific surface area is 175-225 m/g, the defoaming agent is an organic silicon defoaming agent, the antioxidant is phenol, and the preparation method of the modified kaolin is as follows: mixing 20g of kaolin with an equal amount of tartaric acid; burning at 580-620 ℃ for 1.4h, and cooling; placing in a 300ml beaker, adding 150ml deionized water and 50ml hexadecyl trimethyl ammonium bromide solution with the concentration of 20mmol/L, and magnetically stirring for 4.5 h; washing zeolite with deionized water, and naturally drying to obtain modified kaolin, wherein the preparation method of the modified sepiolite comprises the following steps: preparing a sepiolite solution, adding sodium borohydride and chloroplatinic acid, carrying out ultrasonic treatment for 14min at room temperature, drying, and roasting at 380-400 ℃ for 24min to obtain modified sepiolite, wherein the preparation method of the modified titanium dioxide comprises the following steps: weighing 2mL of N, N-dimethylformamide and 60mL of deionized water, mixing, magnetically stirring at normal temperature for 20min, adding 1.8g of titanium dioxide powder, continuously magnetically stirring at normal temperature for 25min, transferring the mixed solution into a hydrothermal reaction kettle, reacting at 150 ℃ for 18h, fully cooling, washing the product with alcohol and water, drying and grinding to obtain the modified titanium dioxide, wherein the light stabilizer consists of o-hydroxybenzophenone, salicylate, triazine and substituted acrylonitrile in a combination ratio of 1:2:1:1, the coupling agent consists of vinyltriethoxysilane, gamma-aminopropyltriethoxysilane and vinyltrimethoxysilane in a combination ratio of: 1:1: 2; adding deionized water into a stirring tank at the rotating speed of 900r/min, and then respectively adding the active filler, the fumed silica and the modified titanium dioxide into the stirring tank and stirring the mixture at a low speed for 40 min; respectively adding the acrylate emulsion, the thickening agent, the dispersing agent, the modified kaolin and the modified sepiolite according to the formula design dosage, and stirring at a high speed of 1500r/min for 45 min; adding the defoaming agent and the antioxidant according to the formula dosage, and continuously stirring at a high speed for 60 min; adding the light stabilizer and the coupling agent according to the formula dosage, and continuously stirring at a high speed for 80min to obtain the low-cost environment-friendly waterproof building coating.
Comparative example 1
Weighing 180 parts of acrylate emulsion, 55 parts of active filler, 45 parts of deionized water, 14 parts of thickening agent, 4 parts of dispersing agent, 3 parts of fumed silica, 4 parts of defoaming agent, 4 parts of antioxidant, 12 parts of modified sepiolite, 4 parts of light stabilizer, 8 parts of modified titanium dioxide and 5 parts of coupling agent in sequence according to the weight parts, wherein the active filler consists of palygorskite, vanadium pentoxide and polyaluminum chloride, the combination ratio is 1:1:2, the thickening agent consists of hydroxypropyl starch, carboxymethyl starch and hydroxypropyl methyl cellulose, the combination ratio is 1:1:1, the primary particle size of the fumed silica is 7-40 nm, the specific surface area is 175-225 m/g, the defoaming agent is an organic silicon defoaming agent, the antioxidant is phenol, and the preparation method of the modified sepiolite comprises the following steps: preparing a sepiolite solution, adding sodium borohydride and chloroplatinic acid, carrying out ultrasonic treatment for 13min at room temperature, drying, and roasting at 380-400 ℃ for 18min to obtain modified sepiolite, wherein the preparation method of the modified titanium dioxide comprises the following steps: weighing 2mL of N, N-dimethylformamide and 60mL of deionized water, mixing, magnetically stirring at normal temperature for 20min, adding 1.8g of titanium dioxide powder, continuously magnetically stirring at normal temperature for 25min, transferring the mixed solution into a hydrothermal reaction kettle, reacting at 150 ℃ for 18h, fully cooling, washing the product with alcohol and water, drying and grinding to obtain the modified titanium dioxide, wherein the light stabilizer consists of o-hydroxybenzophenone, salicylate, triazine and substituted acrylonitrile in a combination ratio of 1:2:1:3, the coupling agent consists of vinyltriethoxysilane, gamma-aminopropyltriethoxysilane and vinyltrimethoxysilane in a combination ratio of: 2:1: 2; adding deionized water into a stirring tank at the rotating speed of 600r/min, and then respectively adding the active filler, the fumed silica and the modified titanium dioxide into the stirring tank and stirring the mixture at a low speed for 32 min; adding the acrylate emulsion, the thickening agent, the dispersing agent and the modified sepiolite according to the formula design amount, and stirring at a high speed of 1400r/min for 40 min; adding the defoaming agent and the antioxidant according to the formula dosage, and continuously stirring at a high speed for 54 min; adding the light stabilizer and the coupling agent according to the formula dosage, and continuously stirring at a high speed for 65min to obtain the waterproof building coating.
Comparative example 2
Weighing 180 parts of acrylate emulsion, 55 parts of active filler, 45 parts of deionized water, 14 parts of thickening agent, 4 parts of dispersing agent, 3 parts of fumed silica, 4 parts of defoaming agent, 4 parts of antioxidant, 15 parts of modified kaolin, 4 parts of light stabilizer, 8 parts of modified titanium dioxide and 5 parts of coupling agent in sequence according to the weight parts, wherein the active filler consists of palygorskite, vanadium pentoxide and polyaluminum chloride, the combination ratio is 1:1:2, the thickening agent consists of hydroxypropyl starch, carboxymethyl starch and hydroxypropyl methyl cellulose, the combination ratio is 1:1:1, the primary particle size of the fumed silica is 7-40 nm, the specific surface area is 175-225 m/g, the defoaming agent is an organic silicon defoaming agent, the antioxidant is phenol, and the preparation method of the modified kaolin is as follows: mixing 20g of kaolin with an equal amount of tartaric acid; burning at 580-620 ℃ for 1.3h, and cooling; placing in a 300ml beaker, adding 150ml deionized water and 50ml hexadecyl trimethyl ammonium bromide solution with the concentration of 20mmol/L, and magnetically stirring for 4 hours; washing zeolite with deionized water, and naturally drying to obtain modified kaolin, wherein the preparation method of the modified titanium dioxide comprises the following steps: weighing 2mL of N, N-dimethylformamide and 60mL of deionized water, mixing, magnetically stirring at normal temperature for 20min, adding 1.8g of titanium dioxide powder, continuously magnetically stirring at normal temperature for 25min, transferring the mixed solution into a hydrothermal reaction kettle, reacting at 150 ℃ for 18h, fully cooling, washing the product with alcohol and water, drying and grinding to obtain the modified titanium dioxide, wherein the light stabilizer consists of o-hydroxybenzophenone, salicylate, triazine and substituted acrylonitrile in a combination ratio of 1:2:1:3, the coupling agent consists of vinyltriethoxysilane, gamma-aminopropyltriethoxysilane and vinyltrimethoxysilane in a combination ratio of: 2:1: 2; adding deionized water into a stirring tank at the rotating speed of 600r/min, and then respectively adding the active filler, the fumed silica and the modified titanium dioxide into the stirring tank and stirring the mixture at a low speed for 32 min; respectively adding the acrylate emulsion, the thickening agent, the dispersing agent and the modified kaolin according to the formula design amount, and stirring at a high speed of 1400r/min for 40 min; adding the defoaming agent and the antioxidant according to the formula dosage, and continuously stirring at a high speed for 54 min; adding the light stabilizer and the coupling agent according to the formula dosage, and continuously stirring at a high speed for 65min to obtain the architectural coating.
Comparative example 3
Weighing 180 parts of acrylate emulsion, 55 parts of active filler, 45 parts of deionized water, 14 parts of thickener, 4 parts of dispersant, 3 parts of fumed silica, 4 parts of defoamer, 4 parts of antioxidant, 4 parts of light stabilizer, 8 parts of modified titanium dioxide and 5 parts of coupling agent in sequence according to the weight parts, wherein the active filler consists of palygorskite, vanadium pentoxide and polyaluminum chloride in a combination ratio of 1:1:2, the thickener consists of hydroxypropyl starch, carboxymethyl starch and hydroxypropyl methyl cellulose in a combination ratio of 1:1:1, the primary particle size of the fumed silica is 7-40 nm, the specific surface area is 175-225 m/g, the defoamer is an organic silicon defoamer, the antioxidant is phenol, and the preparation method of the modified titanium dioxide comprises the following steps: weighing 2mL of N, N-dimethylformamide and 60mL of deionized water, mixing, magnetically stirring at normal temperature for 20min, adding 1.8g of titanium dioxide powder, continuously magnetically stirring at normal temperature for 25min, transferring the mixed solution into a hydrothermal reaction kettle, reacting at 150 ℃ for 18h, fully cooling, washing the product with alcohol and water, drying and grinding to obtain the modified titanium dioxide, wherein the light stabilizer consists of o-hydroxybenzophenone, salicylate, triazine and substituted acrylonitrile in a combination ratio of 1:2:1:3, the coupling agent consists of vinyltriethoxysilane, gamma-aminopropyltriethoxysilane and vinyltrimethoxysilane in a combination ratio of: 2:1: 2; adding deionized water into a stirring tank at the rotating speed of 600r/min, and then respectively adding the active filler, the fumed silica and the modified titanium dioxide into the stirring tank and stirring the mixture at a low speed for 32 min; respectively adding acrylate emulsion, a thickening agent, a dispersing agent, modified kaolin and modified sepiolite according to the formula design dosage, and stirring at a high speed of 1400r/min for 40 min; adding the defoaming agent and the antioxidant according to the formula dosage, and continuously stirring at a high speed for 54 min; adding the light stabilizer and the coupling agent according to the formula dosage, and continuously stirring at a high speed for 65min to obtain the architectural coating.
Test example
The waterproof architectural coatings prepared in examples 1 to 5 and comparative examples 1 to 3 were tested for waterproof performance.
The test strictly tests the upstream surface seepage resistance pressure and the back surface seepage resistance pressure according to GB-18445-:
in conclusion, the method disclosed by the invention has the advantages that the kaolin is modified by adopting the method, the adsorption pertinence is enhanced, the formaldehyde in a room can be actively adsorbed, and the adsorption efficiency is improved; and the formaldehyde adsorption capacity of the modified kaolin is greatly increased compared with that before the modified kaolin is modified. The modified kaolin added by 1-5% can play an excellent formaldehyde adsorption effect and can avoid the cracking of the coating; the sepiolite is a pure natural, nontoxic, tasteless, asbestos-free and radioactive element-free hydrated magnesium silicate clay mineral, has the largest specific surface area and a unique content pore channel structure in nonmetal minerals, can adsorb external toxic substances such as formaldehyde, benzene, ammonia and the like, and can absorb formaldehyde generated in the air; the chloroplatinic acid is reduced by sodium borohydride, then nano platinum is loaded in the sepiolite, the sodium borohydride, the chloroplatinic acid and the sepiolite can form a Pt/sepiolite composite material with strong adsorption capacity, formaldehyde can be catalytically oxidized at room temperature, and the effect of adsorbing and degrading formaldehyde is achieved;
while the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. The low-cost environment-friendly waterproof building coating is characterized by mainly comprising the following raw materials in parts by weight:
200 parts of acrylate emulsion 160-one, 50-70 parts of active filler, 40-60 parts of deionized water, 10-18 parts of thickening agent, 2-5 parts of dispersing agent, 1-4 parts of fumed silica, 2-6 parts of defoaming agent, 2-6 parts of antioxidant, 12-20 parts of modified kaolin, 10-15 parts of modified sepiolite, 2-5 parts of light stabilizer, 6-12 parts of modified titanium dioxide and 3-7 parts of coupling agent.
2. The low-cost environment-friendly waterproof building coating as claimed in claim 1, wherein the active filler is composed of palygorskite, vanadium pentoxide and polyaluminium chloride in a combination ratio of 1:1:2, and the thickener is composed of one or more of hydroxypropyl starch, carboxymethyl starch and hydroxypropyl methyl cellulose.
3. The low-cost environment-friendly waterproof building coating as claimed in claim 1 or 2, wherein the fumed silica has a primary particle size of 7-40 nm and a specific surface area of 175-225 m/g.
4. The low-cost environment-friendly waterproof building coating as claimed in claim 3, wherein the defoamer is an organic silicon defoamer, and the antioxidant consists of one or two of phenols and phosphorous acid.
5. The low-cost environment-friendly waterproof building coating as claimed in claim 4, wherein the modified kaolin is prepared by the following steps: mixing 20g of kaolin with an equal amount of tartaric acid; burning at 580-620 ℃ for 1.2-1.4h, and cooling; placing in a 300ml beaker, adding 150ml deionized water and 50ml hexadecyl trimethyl ammonium bromide solution with the concentration of 20mmol/L, and magnetically stirring for 3.5-4.5 h; and washing the zeolite with deionized water, and naturally drying to obtain the modified kaolin.
6. The low-cost environment-friendly waterproof building coating as claimed in claim 5, wherein the preparation method of the modified sepiolite comprises the following steps: preparing a sepiolite solution, adding sodium borohydride and chloroplatinic acid, carrying out ultrasonic treatment for 12-14 min at room temperature, drying, and roasting at 380-400 ℃ for 16-24 min to obtain the modified sepiolite.
7. The low-cost environment-friendly waterproof building coating as claimed in claim 6, wherein the preparation method of the modified titanium dioxide is as follows: weighing 2mL of N, N-dimethylformamide and 60mL of deionized water, mixing, magnetically stirring at normal temperature for 20min, adding 1.8g of titanium dioxide powder, continuously magnetically stirring at normal temperature for 25min, transferring the mixed solution into a hydrothermal reaction kettle, reacting at 150 ℃ for 18h, fully cooling, washing the product with alcohol and water, drying, and grinding to obtain the modified titanium dioxide.
8. The low-cost environment-friendly waterproof architectural coating as claimed in claim 7, wherein the light stabilizer is composed of one or more of o-hydroxybenzophenones, salicylates, triazines and substituted acrylonitriles.
9. The low-cost environment-friendly waterproof architectural coating according to claim 8, wherein the coupling agent is composed of one or more of vinyltriethoxysilane, gamma-aminopropyltriethoxysilane, and vinyltrimethoxysilane.
10. A method for preparing the low-cost environment-friendly waterproof building coating as claimed in any one of claims 1 to 9, which is characterized by comprising the following steps:
1) weighing 200 parts of acrylate emulsion 160-one, 50-70 parts of active filler, 40-60 parts of deionized water, 10-18 parts of thickening agent, 2-5 parts of dispersing agent, 1-4 parts of fumed silica, 2-6 parts of defoaming agent, 2-6 parts of antioxidant, 12-20 parts of modified kaolin, 10-15 parts of modified sepiolite, 2-5 parts of light stabilizer, 6-12 parts of modified titanium dioxide and 3-7 parts of coupling agent in sequence according to the weight parts;
2) adding deionized water into a stirring tank at the rotation speed of 500-900r/min, and then respectively adding the active filler, the fumed silica and the modified titanium dioxide into the stirring tank and stirring the mixture at a low speed for 30-40 min;
3) respectively adding acrylate emulsion, a thickening agent, a dispersing agent, modified kaolin and modified sepiolite according to the formula design amount, and stirring at a high speed of 1200-1500r/min for 35-45 min;
4) adding the defoaming agent and the antioxidant according to the formula dosage, and continuously stirring at a high speed for 50-60 min;
5) adding the light stabilizer and the coupling agent according to the formula dosage, and continuously stirring at high speed for 60-80min to obtain the low-cost environment-friendly waterproof building coating.
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| CN109577104A (en) * | 2018-12-08 | 2019-04-05 | 上海朴美家具有限公司 | A kind of preparation method of environment protection pressed-fibre board and the processing technology of furniture |
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| CN110670414A (en) * | 2019-10-16 | 2020-01-10 | 淮阴师范学院 | Heat-resistant waterproof wallpaper and preparation method thereof |
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| CN104356830A (en) * | 2014-11-24 | 2015-02-18 | 张乔木 | Waterproof paint for building and preparation method of waterproof paint |
| CN106928779A (en) * | 2017-03-29 | 2017-07-07 | 合肥天沃能源科技有限公司 | A kind of energy-saving wall coating and preparation method thereof |
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| CN110015905A (en) * | 2018-01-08 | 2019-07-16 | 北新集团建材股份有限公司 | A kind of decorated gypsum board and preparation method thereof except formaldehyde |
| CN109577104A (en) * | 2018-12-08 | 2019-04-05 | 上海朴美家具有限公司 | A kind of preparation method of environment protection pressed-fibre board and the processing technology of furniture |
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