CN116285644B - Waterproof and anticorrosive paint for building and preparation method thereof - Google Patents

Waterproof and anticorrosive paint for building and preparation method thereof Download PDF

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CN116285644B
CN116285644B CN202310399778.3A CN202310399778A CN116285644B CN 116285644 B CN116285644 B CN 116285644B CN 202310399778 A CN202310399778 A CN 202310399778A CN 116285644 B CN116285644 B CN 116285644B
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CN116285644A (en
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周亚芳
陈熙
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Ligao Industry Guangzhou Co ltd
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    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
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Abstract

The invention relates to the technical field of building coatings, in particular to a waterproof and anti-corrosion coating for a building and a preparation method thereof; comprises the raw materials of 20 to 40 parts of modified polyurethane emulsion, 10 to 20 parts of modified asphalt emulsion, 10 to 20 parts of fluorocarbon resin, 10 to 20 parts of nano silicon dioxide emulsion, 5 to 15 parts of modified graphite, 10 to 15 parts of hydroxymethyl cellulose, 8 to 15 parts of pigment and filler, 2 to 6 parts of dispersing agent and 7 to 10 parts of auxiliary agent; the modified polyurethane emulsion and the modified asphalt emulsion are used as base liquids, fluorocarbon resin and nano silicon dioxide emulsion are added for modification, modified graphite and pigment filler are added, and hydroxymethyl cellulose and an auxiliary agent are added to form the coating for the building, so that the viscosity and the strength of the coating after curing are improved; the adhesive property of the paint is improved, the paint is easier to solidify and form a film, the prepared paint has good waterproof performance and medium corrosion resistance, the mechanical property is comprehensively improved, and the paint has proper fluidity and viscosity, thereby being beneficial to the preservation and construction of the paint.

Description

Waterproof and anticorrosive paint for building and preparation method thereof
Technical Field
The invention relates to the technical field of building coatings, in particular to a waterproof and anti-corrosion coating for a building and a preparation method thereof.
Background
Along with the development of science and technology and economy, the modern process is developed, especially the modern architecture is developed rapidly, the modern architecture mostly uses concrete as a main material, the concrete is a porous medium material, the porous medium material has better strength, however, the porous medium material has the property that various micro molecules or particles, water molecules and other factors with corrosion properties are easy to adsorb in the long-term use process, and often can permeate into the concrete through micro cracks in the concrete, so that the concrete structure is severely corroded and damaged as a result of the long-term use. At present, the building is not limited to land surface building, underground tunnel engineering and ocean engineering are developed, so that the building with a concrete structure faces more serious problems of water, salt, acid and alkali corrosion. In order to ensure the safety of the building, delay the corrosion time and prolong the service life of the building, the surface of the building needs to be painted with a coating with waterproof and anti-corrosion properties.
Most of the existing paint has single performance, can not give consideration to the related viewing, waterproof and corrosion resistance, has the problems of high-temperature melting and high-temperature combustion, can cause potential safety hazards, is difficult to cope with increasingly complex application requirements, and can not meet the requirements along with the complex corrosion environment faced by a building.
Disclosure of Invention
The invention aims to provide a waterproof and anticorrosive coating for a building and a preparation method thereof, which can increase the viscosity and the strength of the coating after solidification; the adhesive property of the paint is improved, the paint is easier to solidify into a film, the prepared paint has good waterproof performance and medium corrosion resistance, the mechanical property is comprehensively improved, and the paint has proper fluidity and viscosity, thereby being beneficial to the preservation and construction of the paint.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The waterproof anticorrosive paint for the building comprises the following raw materials in parts by weight: 20-40 parts of modified polyurethane emulsion, 10-20 parts of modified asphalt emulsion, 10-20 parts of fluorocarbon resin, 10-20 parts of nano silicon dioxide emulsion, 5-15 parts of modified graphite, 10-15 parts of hydroxymethyl cellulose, 8-15 parts of pigment and filler, 2-6 parts of dispersing agent and 7-10 parts of auxiliary agent;
the preparation method of the waterproof anticorrosive paint for the building comprises the following steps:
Step one: mixing the modified polyurethane emulsion, the modified asphalt emulsion and the fluorocarbon resin in parts by weight, and stirring at a speed of 800-1000 r/min for 10-15 min to form a mixture A;
Step two: mixing modified graphite and pigment and filler in parts by weight, adding nano silicon dioxide emulsion in parts by weight, stirring at a speed of 80-120 r/min for 15-30 min, adding dispersing agent in parts by weight, and stirring at a speed of 80-120 r/min for 30-40 min to form a mixture B;
step three: mixing the mixture A obtained in the step one and the mixture B obtained in the step two, adding the hydroxymethyl cellulose and the auxiliary agent in parts by weight, and stirring at the speed of 200-400 r/min for 15-30 min at the temperature of 50-80 ℃ to obtain the waterproof anticorrosive paint for the building.
Further preferably, the modified polyurethane emulsion is prepared by taking bisphenol A epoxy resin with a certain mass, adding acetone with a certain mass, and uniformly stirring and mixing to form an epoxy resin mixed solution; mixing toluene diisocyanate, 1, 4-butanediol and polytetrahydrofuran ether glycol with a certain mass, adding dibutyl tin dilaurate with a certain mass, heating to 80-90 ℃, and stirring at a speed of 100-200 r/min for reacting for 1-2 h to obtain polyurethane prepolymer; adding epoxy resin mixed solution into polyurethane prepolymer, continuously stirring and reacting for 1-2 h at 70-80 ℃, reducing the temperature to 30-40 ℃, adding ethylenediamine with certain mass, and stirring and reacting for 1-2 h at the speed of 100-200 r/min to obtain modified polyurethane emulsion.
Further preferably, the mass ratio of the raw materials in the modified polyurethane emulsion is bisphenol A type epoxy resin, acetone, toluene diisocyanate, 1, 4-butanediol, polytetrahydrofuran ether glycol, dibutyl tin dilaurate, ethylenediamine=10:30-50:20-30:5:5-10:1:5. Bisphenol a type epoxy resins can be: bisphenol A diglycidyl ether, bisphenol-A polyoxyethylene ether.
Further preferably, the modified asphalt emulsion is prepared by adding nano alumina with a certain mass into a reaction vessel, adding absolute ethanol with a certain mass and Y-methacryloxypropyl trimethoxy silane with a certain mass, uniformly dispersing by ultrasonic, adding emulsified asphalt with a certain mass, heating to 35-55 ℃ in water bath, and stirring at a speed of 80-100 r/min for reaction for 1-2 h to obtain the modified asphalt emulsion.
Further preferably, the mass ratio of the raw materials in the modified asphalt emulsion is nano alumina, absolute ethyl alcohol, Y-methacryloxypropyl trimethoxy silane, emulsified asphalt=10:50:1-2:50-80.
Further preferably, the modified graphite is prepared by taking a certain mass of expanded graphite, adding a certain mass of ethylene bis stearamide and hydroxyethyl cellulose, adding a certain mass of 1, 3-dichloropropene, heating to 70-80 ℃, stirring at a speed of 100-200 r/min for reaction for 0.5-1 h, adding a certain mass of deionized water, continuously stirring at a speed of 100-200 r/min for reaction for 0.5-1 h, transferring to a ball mill, and performing high-speed ball milling for 8h to obtain the modified graphite.
Further preferably, the mass ratio of the raw materials in the modified graphite is that of the expanded graphite to ethylene bis stearamide to hydroxyethyl cellulose to 1, and 3-dichloropropene to deionized water=10:5:2:10:20.
Further preferably, the pigment and filler is one or more of titanium white, ferroferric oxide, nano zinc oxide, chrome red, chrome yellow and iron blue.
Further preferably, the dispersing agent is formed by mixing absolute ethyl alcohol, organic silicon resin and Y-aminopropyl triethoxysilane according to the mass ratio of 30:20-30:1.
Further preferably, the auxiliary agent is an organosilicon defoamer, the plasticizer is tributyl phthalate, the film forming agent is 3-ethoxypropionic acid ethyl ester, and the auxiliary agent is formed by mixing the organosilicon defoamer, the tributyl phthalate and the 3-ethoxypropionic acid ethyl ester=1:1-2:1-3 according to the mass ratio; the organic silicon defoamer is prepared by reacting dimethyl silicone oil and polyoxyethylene cetyl ether according to the mass ratio of 1:2, adding hydrophobic white carbon black with the mass of 3-5 times of the dimethyl silicone oil and sorbitol anhydride monooleate with the mass of 20-30 times of the dimethyl silicone oil, and shearing and emulsifying at high speed.
The invention has the beneficial effects that:
1. the modified polyurethane emulsion and the modified asphalt emulsion are used as basic emulsion, fluorocarbon resin and nano silicon dioxide emulsion are added for modification, the water resistance and corrosion resistance of the basic emulsion are improved, meanwhile, modified graphite and pigment fillers are added for further improving the corrosion resistance and heat insulation performance, and hydroxymethyl cellulose and auxiliary agents are added for forming the waterproof and anticorrosive paint for the building, so that the viscosity of the paint and the strength after curing are improved; wherein, the modified polyurethane emulsion and the modified asphalt emulsion are matched, polyurethane molecules and bisphenol A epoxy resin form an interpenetrating structure, and under the matching of the modified asphalt emulsion, the adhesive property of the paint is improved, and the paint is easier to be solidified into a film.
2. The modified polyurethane emulsion is prepared by using bisphenol A type epoxy resin to modify in the process of preparing polyurethane, under the action of ethylenediamine, isocyanate groups in polyurethane prepolymer are bonded with ethylenediamine and epoxy resin, an epoxy resin main chain is connected with a polyurethane main chain, and a molecular chain forms a three-dimensional structure.
3. The modified asphalt emulsion is prepared by adding nano alumina to modify on the basis of emulsified asphalt, and connecting the emulsified asphalt with the nano alumina by using Y-methacryloxypropyl trimethoxy silane; the asphalt can be used as a basic raw material of a coating by emulsifying with good fluidity, the nano alumina is modified, so that the waterproof capability of the emulsified asphalt is further enhanced in the use process, meanwhile, the alumina has a lubricating effect and good friction resistance, and is uniformly dispersed in the emulsified asphalt, so that the prepared modified asphalt emulsion has good compatibility when being mixed with other raw materials, and meanwhile, the wear resistance and the waterproof performance of the mixed raw materials can be improved.
4. The fluorocarbon resin is introduced and effectively participates in the waterproof and anticorrosive paint for the building, fluorocarbon molecular chains can be introduced into the paint, the fluorocarbon molecular chains interpenetrate with modified polyurethane and modified asphalt molecular chains to form a three-dimensional interpenetrating structure, so that the weather resistance of the paint is uniformly improved, the waterproof and anticorrosive performances of the paint are improved, in addition, the fluorocarbon resin is matched with modified polyurethane emulsion and modified asphalt emulsion, and after the paint is solidified, the wear resistance, corrosion resistance and mechanical properties of the paint are comprehensively improved.
5. The nano silicon dioxide in the nano silicon dioxide emulsion exists uniformly and stably, the nano silicon dioxide is not agglomerated in the coating in the preparation process of the coating in the form of emulsion, can be fully dispersed among raw materials, is wrapped by the modified polyurethane emulsion, the modified asphalt emulsion and the fluorocarbon resin, on one hand, acts as a lubricant, so that the modified polyurethane emulsion, the modified asphalt emulsion, the fluorocarbon resin, the modified graphite and the pigment filler have better lubricating effect, are beneficial to mutual dispersion and further compatibility among raw materials, on the other hand, the use of the nano silicon dioxide can improve the water resistance of the coating, the nano silicon dioxide is uniformly distributed on the surface of the coating and the inside of the pore canal after the coating is solidified to form the coating, the nano silicon dioxide on the surface of the coating can play a role similar to lotus leaf effect, the surface hydrophobicity is good, the nano silicon dioxide in the pore canal can effectively block the pore canal, so that water molecules are not easy to penetrate into the coating, and the water resistance of the coating is further ensured.
6. The graphite is modified to obtain modified graphite, so that the modified graphite has better compatibility and certain bonding capability in the raw materials for preparing the paint, can be combined on a macromolecular chain of the raw materials for preparing the paint to form a stable structure, fully plays the advantages of the graphite in the paint, and enhances the wear resistance, water resistance and corrosion resistance of the paint; the pigment and filler can be reasonably configured to realize different colors of the paint, and the pigment and filler and the modified graphite can be uniformly distributed in the paint after being fully dispersed by the dispersing agent, so that the water resistance, wear resistance and other performances of the paint are further enhanced; the viscosity and film forming property of the paint are further regulated by using the hydroxymethyl cellulose and the auxiliary agent, so that the paint has proper fluidity and viscosity, and the preservation and construction of the paint are facilitated.
Detailed Description
The following description of the present invention will be made clearly and fully, and it is apparent that the embodiments described are only some, but not all, of the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The waterproof anticorrosive paint for the building comprises, by weight, 10 parts of fluorocarbon resin, 10 parts of nano silicon dioxide emulsion, 5 parts of modified graphite, 10 parts of hydroxymethyl cellulose, 8 parts of pigment and filler, 2 parts of dispersing agent and 7 parts of auxiliary agent;
The modified polyurethane emulsion is prepared by taking bisphenol A type epoxy resin with certain mass, adding acetone with certain mass, and uniformly stirring and mixing to form an epoxy resin mixed solution; mixing toluene diisocyanate, 1, 4-butanediol and polytetrahydrofuran ether glycol with a certain mass, adding dibutyl tin dilaurate with a certain mass, heating to 80 ℃, and stirring at a speed of 100r/min for reaction for 1h to obtain a polyurethane prepolymer; adding an epoxy resin mixed solution into a polyurethane prepolymer, continuously stirring and reacting for 1h at 70 ℃, reducing the temperature to 30 ℃, adding ethylenediamine with a certain mass, and stirring and reacting for 1h at a speed of 100r/min to obtain a modified polyurethane emulsion; wherein the mass ratio of the raw materials is bisphenol A epoxy resin, acetone, toluene diisocyanate, 1, 4-butanediol, polytetrahydrofuran ether glycol, dibutyl tin dilaurate, ethylenediamine=10:30:20:5:5:1:5; bisphenol A type epoxy resin is bisphenol A diglycidyl ether;
The modified asphalt emulsion is prepared by adding nano alumina with a certain mass into a reaction vessel, adding absolute ethanol with a certain mass and Y-methacryloxypropyl trimethoxy silane with a certain mass, uniformly dispersing by ultrasonic, adding emulsified asphalt with a certain mass, heating to 35 ℃ in water bath, and stirring at a speed of 80r/min for reaction for 1h to obtain the modified asphalt emulsion; wherein the mass ratio of the raw materials is nano alumina to absolute ethyl alcohol to Y-methacryloxypropyl trimethoxy silane to emulsified asphalt=10:50:1:50;
The modified graphite is prepared by taking a certain mass of expanded graphite, adding a certain mass of ethylene bis stearamide and hydroxyethyl cellulose, adding a certain mass of 1, 3-dichloropropene, heating to 70 ℃, stirring at a speed of 100r/min for reaction for 0.5h, adding a certain mass of deionized water, continuously stirring at a speed of 100r/min for reaction for 0.5h, transferring to a ball mill, and performing high-speed ball milling for 8h to obtain the modified graphite; wherein the mass ratio of the raw materials is expanded graphite to ethylene bis stearamide to hydroxyethyl cellulose to 1, 3-dichloropropene to deionized water=10:5:2:10:20;
The pigment and filler is titanium dioxide; the dispersing agent is formed by mixing absolute ethyl alcohol, organic silicon resin and Y-aminopropyl triethoxysilane according to the mass ratio of 30:20:1;
The auxiliary agent is an organosilicon defoamer, the plasticizer is tributyl phthalate, the film forming agent is 3-ethoxypropionic acid ethyl ester, and the auxiliary agent is formed by mixing the organosilicon defoamer, the tributyl phthalate and the 3-ethoxypropionic acid ethyl ester=1:1:1 according to the mass ratio; the organic silicon defoamer is obtained by adding hydrophobic white carbon black with the mass of 3 times of the dimethyl silicone oil and sorbitol anhydride monooleate with the mass of 20 times of the dimethyl silicone oil into dimethyl silicone oil after the dimethyl silicone oil and polyoxyethylene cetyl ether react according to the mass ratio of 1:2;
the preparation method of the waterproof anticorrosive paint for the building comprises the following steps:
Step one: mixing the modified polyurethane emulsion, the modified asphalt emulsion and the fluorocarbon resin in parts by weight, and stirring at a speed of 800r/min for 10min to form a mixture A;
Step two: mixing modified graphite and pigment and filler in parts by weight, adding nano silicon dioxide emulsion in parts by weight, stirring at a speed of 80r/min for 15min, adding dispersing agent in parts by weight, and stirring at a speed of 80r/min for 30min to form a mixture B;
Step three: mixing the mixture A obtained in the step one and the mixture B obtained in the step two, adding the hydroxymethyl cellulose and the auxiliary agent in parts by weight, and stirring at the speed of 200r/min for 15min at the temperature of 50 ℃ to obtain the waterproof anticorrosive paint for the building.
Example 2
The waterproof anticorrosive paint for the building comprises, by weight, 20 parts of fluorocarbon resin, 20 parts of nano silicon dioxide emulsion, 15 parts of modified graphite, 15 parts of hydroxymethyl cellulose, 15 parts of pigment and filler, 6 parts of dispersing agent and 10 parts of auxiliary agent;
the modified polyurethane emulsion is prepared by taking bisphenol A type epoxy resin with certain mass, adding acetone with certain mass, and uniformly stirring and mixing to form an epoxy resin mixed solution; mixing toluene diisocyanate, 1, 4-butanediol and polytetrahydrofuran ether glycol with a certain mass, adding dibutyl tin dilaurate with a certain mass, heating to 90 ℃, and stirring at a speed of 200r/min for reaction for 2 hours to obtain a polyurethane prepolymer; adding an epoxy resin mixed solution into a polyurethane prepolymer, continuously stirring and reacting for 2 hours at 80 ℃, reducing the temperature to 40 ℃, adding ethylenediamine with a certain mass, and stirring and reacting for 2 hours at a speed of 200r/min to obtain a modified polyurethane emulsion; wherein the mass ratio of the raw materials is bisphenol A epoxy resin, acetone, toluene diisocyanate, 1, 4-butanediol, polytetrahydrofuran ether glycol, dibutyl tin dilaurate, ethylenediamine=10:50:30:5:10:1:5; bisphenol A type epoxy resin is bisphenol-A polyoxyethylene ether;
The modified asphalt emulsion is prepared by adding nano alumina with a certain mass into a reaction vessel, adding absolute ethanol with a certain mass and Y-methacryloxypropyl trimethoxy silane with a certain mass, uniformly dispersing by ultrasonic, adding emulsified asphalt with a certain mass, heating to 55 ℃ in water bath, and stirring at a speed of 100r/min for reaction for 2 hours to obtain the modified asphalt emulsion; wherein the mass ratio of the raw materials is nano alumina to absolute ethyl alcohol to Y-methacryloxypropyl trimethoxy silane to emulsified asphalt=10:50:2:80;
The modified graphite is prepared by taking a certain mass of expanded graphite, adding a certain mass of ethylene bis stearamide and hydroxyethyl cellulose, adding a certain mass of 1, 3-dichloropropene, heating to 80 ℃, stirring at a speed of 200r/min for reaction for 1h, adding a certain mass of deionized water, continuously stirring at a speed of 200r/min for reaction for 1h, transferring to a ball mill, and performing high-speed ball milling for 8h to obtain the modified graphite; wherein the mass ratio of the raw materials is expanded graphite to ethylene bis stearamide to hydroxyethyl cellulose to 1, 3-dichloropropene to deionized water=10:5:2:10:20;
the pigment filler is ferroferric oxide; the dispersing agent is formed by mixing absolute ethyl alcohol, organic silicon resin and Y-aminopropyl triethoxysilane according to the mass ratio of 30:30:1;
The auxiliary agent is an organosilicon defoamer, the plasticizer is tributyl phthalate, the film forming agent is 3-ethoxypropionic acid ethyl ester, and the auxiliary agent is formed by mixing the organosilicon defoamer, the tributyl phthalate and the 3-ethoxypropionic acid ethyl ester=1:2:3 according to the mass ratio; the organic silicon defoamer is obtained by adding hydrophobic white carbon black with the mass of 5 times of the dimethyl silicone oil and sorbitol anhydride monooleate with the mass of 30 times of the dimethyl silicone oil into dimethyl silicone oil after the dimethyl silicone oil and polyoxyethylene cetyl ether react according to the mass ratio of 1:2;
the preparation method of the waterproof anticorrosive paint for the building comprises the following steps:
Step one: mixing the modified polyurethane emulsion, the modified asphalt emulsion and the fluorocarbon resin in parts by weight, and stirring at a speed of 1000r/min for 15min to form a mixture A;
step two: mixing modified graphite and pigment and filler in parts by weight, adding nano silicon dioxide emulsion in parts by weight, stirring at a speed of 120r/min for 30min, adding dispersing agent in parts by weight, and stirring at a speed of 120r/min for 40min to form a mixture B;
Step three: mixing the mixture A obtained in the step one and the mixture B obtained in the step two, adding the hydroxymethyl cellulose and the auxiliary agent in parts by weight, and stirring at the speed of 400r/min for 30min at the temperature of 80 ℃ to obtain the waterproof anticorrosive paint for the building.
Example 3
The waterproof anticorrosive paint for the building comprises, by weight, 15 parts of fluorocarbon resin, 15 parts of nano silicon dioxide emulsion, 10 parts of modified graphite, 12 parts of hydroxymethyl cellulose, 12 parts of pigment and filler, 4 parts of dispersing agent and 8 parts of auxiliary agent;
The modified polyurethane emulsion is prepared by taking bisphenol A type epoxy resin with certain mass, adding acetone with certain mass, and uniformly stirring and mixing to form an epoxy resin mixed solution; mixing toluene diisocyanate, 1, 4-butanediol and polytetrahydrofuran ether glycol with a certain mass, adding dibutyl tin dilaurate with a certain mass, heating to 85 ℃, and stirring at a speed of 150r/min for reacting for 2 hours to obtain a polyurethane prepolymer; adding an epoxy resin mixed solution into a polyurethane prepolymer, continuously stirring and reacting for 2 hours at 75 ℃, reducing the temperature to 35 ℃, adding ethylenediamine with a certain mass, and stirring and reacting for 1 hour at a speed of 150r/min to obtain a modified polyurethane emulsion; wherein the mass ratio of the raw materials is bisphenol A epoxy resin, acetone, toluene diisocyanate, 1, 4-butanediol, polytetrahydrofuran ether glycol, dibutyl tin dilaurate, ethylenediamine=10:40:25:5:8:1:5; bisphenol A type epoxy resin is bisphenol A diglycidyl ether;
The modified asphalt emulsion is prepared by adding nano alumina with a certain mass into a reaction vessel, adding absolute ethanol with a certain mass and Y-methacryloxypropyl trimethoxy silane with a certain mass, uniformly dispersing by ultrasonic, adding emulsified asphalt with a certain mass, heating to 45 ℃ in water bath, and stirring at a speed of 90r/min for reaction for 1 hour to obtain the modified asphalt emulsion; wherein the mass ratio of the raw materials is nano alumina to absolute ethyl alcohol to Y-methacryloxypropyl trimethoxy silane to emulsified asphalt=10:50:1:60;
The modified graphite is prepared by taking a certain mass of expanded graphite, adding a certain mass of ethylene bis stearamide and hydroxyethyl cellulose, adding a certain mass of 1, 3-dichloropropene, heating to 75 ℃, stirring at a speed of 150r/min for reaction for 0.6h, adding a certain mass of deionized water, continuously stirring at a speed of 150r/min for reaction for 0.5h, transferring to a ball mill, and performing high-speed ball milling for 8h to obtain the modified graphite; wherein the mass ratio of the raw materials is expanded graphite to ethylene bis stearamide to hydroxyethyl cellulose to 1, 3-dichloropropene to deionized water=10:5:2:10:20;
The pigment and filler is chrome red; the dispersing agent is formed by mixing absolute ethyl alcohol, organic silicon resin and Y-aminopropyl triethoxysilane according to the mass ratio of 30:25:1;
the auxiliary agent is an organosilicon defoamer, the plasticizer is tributyl phthalate, the film forming agent is 3-ethoxypropionic acid ethyl ester, and the auxiliary agent is formed by mixing the organosilicon defoamer, the tributyl phthalate and the 3-ethoxypropionic acid ethyl ester=1:1:2 according to the mass ratio; the organic silicon defoamer is obtained by adding hydrophobic white carbon black with the mass of 4 times of the dimethyl silicone oil and sorbitol anhydride monooleate with the mass of 25 times of the dimethyl silicone oil into dimethyl silicone oil and polyoxyethylene cetyl ether to perform high-speed shearing emulsification after the dimethyl silicone oil and polyoxyethylene cetyl ether react according to the mass ratio of 1:2;
the preparation method of the waterproof anticorrosive paint for the building comprises the following steps:
Step one: mixing the modified polyurethane emulsion, the modified asphalt emulsion and the fluorocarbon resin in parts by weight, and stirring at the speed of 900r/min for 12min to form a mixture A;
step two: mixing modified graphite and pigment and filler in parts by weight, adding nano silicon dioxide emulsion in parts by weight, stirring at a speed of 100r/min for 20min, adding dispersing agent in parts by weight, and stirring at a speed of 100r/min for 35min to form a mixture B;
Step three: mixing the mixture A obtained in the step one and the mixture B obtained in the step two, adding the hydroxymethyl cellulose and the auxiliary agent in parts by weight, and stirring at the speed of 300r/min for 20min at the temperature of 70 ℃ to obtain the waterproof anticorrosive paint for the building.
And (3) testing: performance test was performed on the waterproof anticorrosive paint for construction prepared in examples 1 to 3, wherein the viscosity was measured according to the standard GB/T2794-2013 Single cylindrical rotational viscosimeter for adhesive viscosity, and the viscosity at 25℃was recorded for 60 min; the water resistance is detected according to GB/T16777-2008 building waterproof paint test method, and is detected by referring to GB/T1733-1993 paint film water resistance determination method; corrosion resistance was measured according to GB/T9274-1998 determination of liquid Medium resistance of paints and varnishes, the results are as follows:
Example 1 Example 2 Example 3
Viscosity (mPa. S) 900 1050 950
Water permeability performance Waterproof Waterproof Waterproof
Water resistance 30D no bubble 30D no bubble 30D no bubble
10% H 2SO4 foaming time (d) 16 18 17
10% NaOH bubbling time (d) 23 25 24
As shown in the table, the waterproof anticorrosive paint for the building, which is prepared by the method, has moderate viscosity, good fluidity, no water permeation, no bubbles after soaking in water for 30 days, good water resistance, foaming after soaking in 10% H 2SO4 or 10% NaOH for a long time and good corrosion resistance.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (4)

1. The waterproof anticorrosive paint for the building is characterized by comprising the following raw materials in parts by weight: 20-40 parts of modified polyurethane emulsion, 10-20 parts of modified asphalt emulsion, 10-20 parts of fluorocarbon resin, 10-20 parts of nano silicon dioxide emulsion, 5-15 parts of modified graphite, 10-15 parts of hydroxymethyl cellulose, 8-15 parts of pigment and filler, 2-6 parts of dispersing agent and 7-10 parts of auxiliary agent;
The modified polyurethane emulsion is prepared by taking bisphenol A type epoxy resin with certain mass, adding acetone with certain mass, and uniformly stirring and mixing to form an epoxy resin mixed solution; mixing toluene diisocyanate, 1, 4-butanediol and polytetrahydrofuran ether glycol with a certain mass, adding dibutyl tin dilaurate with a certain mass, heating to 80-90 ℃, and stirring at a speed of 100-200 r/min for reacting for 1-2 h to obtain polyurethane prepolymer; adding an epoxy resin mixed solution into a polyurethane prepolymer, continuously stirring and reacting for 1-2 hours at 70-80 ℃, reducing the temperature to 30-40 ℃, adding ethylenediamine with a certain mass, and stirring and reacting for 1-2 hours at the speed of 100-200 r/min to obtain a modified polyurethane emulsion; wherein the mass ratio of the raw materials in the modified polyurethane emulsion is bisphenol A type epoxy resin, acetone, toluene diisocyanate, 1, 4-butanediol, polytetrahydrofuran ether glycol, dibutyl tin dilaurate, ethylene diamine=10:30-50:20-30:5:5-10:1:5;
The modified asphalt emulsion is prepared by adding nano alumina with certain mass into a reaction vessel, adding absolute ethanol with certain mass and gamma-methacryloxypropyl trimethoxy silane with certain mass, uniformly dispersing by ultrasonic, adding emulsified asphalt with certain mass, heating to 35-55 ℃ in water bath, and stirring at a speed of 80-100 r/min for reacting for 1-2 h to obtain the modified asphalt emulsion;
the modified graphite is prepared by taking a certain mass of expanded graphite, adding a certain mass of ethylene bis stearamide and hydroxyethyl cellulose, adding a certain mass of 1, 3-dichloropropene, heating to 70-80 ℃, stirring at a speed of 100-200 r/min for reaction for 0.5-1 h, adding a certain mass of deionized water, continuously stirring at a speed of 100-200 r/min for reaction for 0.5-1 h, transferring to a ball mill, and performing high-speed ball milling for 8h to obtain the modified graphite;
the preparation method of the waterproof anticorrosive paint for the building comprises the following steps:
Step one: mixing the modified polyurethane emulsion, the modified asphalt emulsion and the fluorocarbon resin in parts by weight, and stirring at a speed of 800-1000 r/min for 10-15 min to form a mixture A;
Step two: mixing modified graphite and pigment and filler in parts by weight, adding nano silicon dioxide emulsion in parts by weight, stirring at a speed of 80-120 r/min for 15-30 min, adding dispersing agent in parts by weight, and stirring at a speed of 80-120 r/min for 30-40 min to form a mixture B;
step three: mixing the mixture A obtained in the step one and the mixture B obtained in the step two, adding the hydroxymethyl cellulose and the auxiliary agent in parts by weight, and stirring at the speed of 200-400 r/min for 15-30 min at the temperature of 50-80 ℃ to obtain the waterproof anticorrosive paint for the building.
2. The waterproof and anticorrosive paint for buildings according to claim 1, wherein: the mass ratio of the raw materials in the modified asphalt emulsion is nano alumina, absolute ethyl alcohol, gamma-methacryloxypropyl trimethoxy silane, emulsified asphalt=10:50:1-2:50-80.
3. The waterproof and anticorrosive paint for buildings according to claim 1, wherein: the mass ratio of the raw materials in the modified graphite is that the mass ratio of the expanded graphite to the ethylene bis stearamide to the hydroxyethyl cellulose to the 1, 3-dichloropropene to the deionized water=10:5:2:10:20.
4. The waterproof and anticorrosive paint for buildings according to claim 1, wherein: the pigment and filler is one or more of titanium white, ferroferric oxide, nano zinc oxide, chrome red, chrome yellow and iron blue.
CN202310399778.3A 2023-04-06 2023-04-06 Waterproof and anticorrosive paint for building and preparation method thereof Active CN116285644B (en)

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CN107964361A (en) * 2017-11-21 2018-04-27 广西武宣金牌防水材料科技有限公司 Polyurethane-modified asphalt waterproofing anti-flaming dope and its production method
CN110066593A (en) * 2019-03-14 2019-07-30 广西经正科技开发有限责任公司 A kind of epoxy resin modification polyurethane anticorrosion water paint and preparation method thereof

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US6544596B2 (en) * 2000-11-29 2003-04-08 Pacific Northwest Coatings Method of coating a substrate using a thermosetting basecoat composition and a thermoplastic top coat composition
CN110527424B (en) * 2019-08-02 2021-02-02 江苏凯伦建材股份有限公司 Double-component normal-temperature non-cured asphalt polyurethane waterproof coating and preparation method thereof

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Publication number Priority date Publication date Assignee Title
CN107964361A (en) * 2017-11-21 2018-04-27 广西武宣金牌防水材料科技有限公司 Polyurethane-modified asphalt waterproofing anti-flaming dope and its production method
CN110066593A (en) * 2019-03-14 2019-07-30 广西经正科技开发有限责任公司 A kind of epoxy resin modification polyurethane anticorrosion water paint and preparation method thereof

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