CN114163890A - Preparation method of high-weather-resistance waterproof exterior wall coating for building - Google Patents
Preparation method of high-weather-resistance waterproof exterior wall coating for building Download PDFInfo
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Abstract
The invention discloses a preparation method of a high-weather-resistance waterproof exterior wall coating for buildings, which is prepared from the following components: the paint comprises fluorine-silicon modified acrylic emulsion, epoxy modified acrylic emulsion, fluorosilane, organic bentonite, silicon oxide, titanium dioxide and auxiliaries, wherein the auxiliaries comprise a dispersing agent, a wetting agent, a thickening agent, a defoaming agent, a film-forming auxiliary and an antifreezing agent; and comprises the following steps: firstly, uniformly mixing the organobentonite, the silicon oxide and the titanium dioxide, then adding the fluorosilicone modified acrylic emulsion and the epoxy modified acrylic emulsion, uniformly mixing, adding the auxiliary agent, uniformly mixing, and finally adding the fluorosilane. The high-weather-resistance waterproof exterior wall coating for the building, which is prepared by the method, has excellent waterproof performance and is self-cleaning and washable, and is suitable for various external environments.
Description
Technical Field
The invention relates to the technical field of building engineering, in particular to a preparation method of a high-weather-resistance waterproof exterior wall coating for buildings. This application is a divisional application with patent number "2020112084643".
Background
The building exterior wall coating is a coating coated on the whole building exterior wall, and has the main functions of decorating and protecting the exterior wall, so that the building looks flat and beautiful, and the building is protected. Exterior wall coatings need to be exposed to outdoor environments and are subject to greater environmental severity than interior wall coatings, especially in certain southern wet areas where the water-resistant function of the exterior wall coating is more demanding.
In the prior art, the acrylic emulsion is often used as a base material, and the prepared water-based acrylic coating has the advantages of moderate cost, good adjustability and the like. However, the water-based acrylic coating on the market is often hot, sticky and cold and brittle, and is easy to crack in a dry environment with the temperature lower than 0 ℃ for a long time in winter in the north of China, and water vapor, rainwater and the like are easy to permeate into wall surfaces and corrode wall bodies in a warm and humid environment in the south of China, so that the attractiveness of buildings is influenced, and the service life of the buildings is shortened. Therefore, the prepared exterior wall coating with good waterproof effect and excellent comprehensive performance still has wide application prospect.
Disclosure of Invention
The invention provides a preparation method of a high-weather-resistance waterproof exterior wall coating for buildings, which overcomes the defects of the prior art, has excellent waterproof performance, is self-cleaning and washable and is suitable for various external environments.
The invention provides a high-weather-resistance waterproof exterior wall coating for buildings, which comprises the following components: the paint comprises fluorine-silicon modified acrylic emulsion, epoxy modified acrylic emulsion, fluorine silane, organic bentonite, silicon oxide, titanium dioxide and auxiliaries, wherein the auxiliaries comprise a dispersing agent, a wetting agent, a thickening agent, a defoaming agent, a film-forming auxiliary and an antifreezing agent.
Optionally, the preparation method of the fluorosilicone modified acrylic emulsion comprises the following steps:
(1) uniformly mixing methacrylate, alkyl acrylate, hydroxyalkyl ester and a crosslinking monomer to obtain acrylic emulsion;
(2) dissolving an initiator and an emulsifier with water to obtain an auxiliary agent solution;
(3) dripping the assistant solution into the acrylic emulsion, uniformly mixing, and then adding activated carbon fiber powder;
(4) and (4) adding an organic silicon monomer and a fluorine monomer into the mixture obtained in the step (3), uniformly mixing, and carrying out microwave heating to obtain the fluorine-silicon modified acrylic emulsion.
The preparation method of the epoxy modified acrylic emulsion comprises the following steps:
(1) uniformly mixing methacrylate, alkyl acrylate, hydroxyalkyl ester and a crosslinking monomer to obtain acrylic emulsion;
(2) dissolving an initiator and an emulsifier with water to obtain an auxiliary agent solution;
(3) dripping the assistant solution into the acrylic emulsion, uniformly mixing, and then adding activated carbon fiber powder;
(4) and (4) adding epoxy resin into the mixture obtained in the step (3), uniformly mixing, and carrying out microwave heating to obtain the epoxy modified acrylic emulsion.
Optionally, the mass parts of the components are as follows:
40-60 parts of fluorine-silicon modified acrylic emulsion
20-30 parts of epoxy modified acrylic emulsion
10-20 parts of fluorosilane
10-20 parts of organic bentonite
10-20 parts of silicon oxide
20-30 parts of titanium dioxide
1-8 parts of assistant
15-35 parts of water.
The mass ratio of the fluorine-silicon modified acrylic emulsion to the epoxy modified acrylic emulsion is (1.5-2.5): 1, and the solid content of the fluorine-silicon modified acrylic emulsion and the solid content of the epoxy modified acrylic emulsion are 50-60%.
Optionally, the fluorosilane is heptadecafluorodecyltrimethoxysilane or tridecafluorooctyltrimethoxysilane.
Optionally, the methacrylate is one or more of methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate and amyl methacrylate; the alkyl acrylate is one or more of methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate and amyl acrylate; the hydroxyalkyl ester is one or more of 2-hydroxyethyl acrylate, 3-hydroxypropyl acrylate, 2-hydroxybutyl acrylate, 2-hydroxyethyl methacrylate and 2-hydroxypropyl methacrylate; the crosslinking monomer is one or more of acrylic acid and methacrylic acid; the emulsifier is sodium alkyl benzene sulfonate or ammonium alkyl benzene sulfonate; the initiator is ammonium persulfate, sodium persulfate or potassium persulfate; the organic silicon monomer is one or more of methyl chlorosilane, phenyl chlorosilane, methyl vinyl chlorosilane, ethyl trichlorosilane, propyl trichlorosilane and vinyl trichlorosilane; the fluorine monomer is one or more of m-trifluoromethyl styrene, 3, 5-bis-trifluoromethyl styrene and pentafluorostyrene; the epoxy resin is one or more of bisphenol A type epoxy resin and bisphenol F type oxygen-containing resin.
Optionally, in the preparation method of the fluorosilicone modified acrylic emulsion, the components in parts by mass are as follows:
30-50 parts of methacrylate
10-20 parts of alkyl acrylate
5-10 parts of hydroxyalkyl ester
5-10 parts of crosslinking monomer
2-5 parts of initiator
2-5 parts of emulsifier
5-10 parts of organic silicon monomer
10-15 parts of fluorine monomer
20-40 parts of water.
In the preparation method of the epoxy modified acrylic emulsion, the components in parts by weight are as follows:
30-50 parts of methacrylate
10-20 parts of alkyl acrylate
5-10 parts of hydroxyalkyl ester
5-10 parts of crosslinking monomer
2-5 parts of initiator
2-5 parts of emulsifier
5-10 parts of epoxy resin
20-40 parts of water.
Optionally, the average particle size of the organic bentonite, the silicon oxide and the activated carbon fiber powder is 200-400 meshes.
Optionally, in the preparation method of the fluorosilicone modified acrylic emulsion, the microwave heating temperature is 30-50 ℃, the time is 3-5 hours, and the pH is adjusted to 7-9; in the preparation method of the epoxy modified acrylic emulsion, the microwave heating temperature is 30-50 ℃, the time is 1-3h, and the pH is adjusted to 7-9.
Optionally, the dispersant is sodium hexametaphosphate or dispersant 5040; the wetting agent is CO-630; the thickening agent is hydroxyethyl cellulose; the defoaming agent is mineral oil or organic silicon defoaming agent; the film-forming additive is dodecyl alcohol ester; the antifreezing agent is ethylene glycol.
In addition, the invention also provides a preparation method of the high-weather-resistance waterproof exterior wall coating for buildings, which comprises the following steps: firstly, uniformly mixing the organobentonite, the silicon oxide and the titanium dioxide, then adding the fluorosilicone modified acrylic emulsion and the epoxy modified acrylic emulsion, uniformly mixing, adding the auxiliary agent, uniformly mixing, and finally adding the fluorosilane.
The invention has the following beneficial effects:
(1) the addition of the fluorosilicone modified acrylic emulsion can effectively overcome the self defects of hot stickiness and cold brittleness of the acrylic emulsion, successfully retains the alkali resistance of the acrylic emulsion, has comprehensive weather resistance and water resistance, is suitable for various complex external environments, and can ensure the service life no matter in the north or the south of China. The addition of the epoxy modified acrylic emulsion effectively improves the strength and corrosion resistance of the coating, also improves the glossiness of the coating, and is suitable for external walls with strict decoration requirements. The addition of the fluorosilane forms a cross-linking structure with the fluorosilicone modified acrylic emulsion and the epoxy modified acrylic emulsion, so that a synergistic effect is achieved, and the waterproofness and the strength of the coating are greatly improved.
(2) In the preparation process of the fluorine-silicon modified acrylic emulsion and the epoxy modified acrylic emulsion, the addition of the activated carbon fiber powder provides fine and dense adsorption sites for modification, so that the modification effect can be achieved under low-temperature microwave heating (30-50 ℃) or even normal temperature, the modification efficiency is improved, and the water resistance of the coating is further ensured.
(3) In the preparation method provided by the invention, the addition timing of the fluorosilane can not only promote the formation of the cross-linked structure, but also protect the cross-linked structure from being damaged to the maximum extent.
(4) The high weather resistance waterproof exterior wall coating for buildings provided by the invention does not contain benzene and aldehyde substances, and is friendly to human body and environment.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Detailed Description
The invention provides a high-weather-resistance waterproof exterior wall coating for buildings, which aims to solve the problems of water resistance and weather resistance of an exterior wall coating. The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The first high-weatherability waterproof exterior wall coating for buildings provided by the embodiment comprises the following components in parts by mass:
50 parts of fluorine-silicon modified acrylic emulsion
Epoxy modified acrylic emulsion 25 parts
Fluorosilane 15 parts
15 portions of organic bentonite
15 parts of silicon oxide
Titanium dioxide 25 parts
Auxiliary agent 5 parts
And 25 parts of water.
Wherein: the solid content of the fluorine-silicon modified acrylic emulsion and the epoxy modified acrylic emulsion is 50-60 percent; the average grain diameter of the organic bentonite and the silicon oxide is 200-400 meshes; the dispersant is sodium hexametaphosphate; the wetting agent is CO-630; the thickening agent is hydroxyethyl cellulose; the defoaming agent is mineral oil; the film-forming additive is dodecyl alcohol ester; the antifreezing agent is ethylene glycol.
Example 2
The second high-weatherability waterproof exterior wall coating for buildings provided by the embodiment comprises the following components in parts by mass:
50 parts of fluorine-silicon modified acrylic emulsion
20 parts of epoxy modified acrylic emulsion
Fluorosilane 20 parts
20 portions of organic bentonite
20 parts of silicon oxide
30 parts of titanium dioxide
Auxiliary agent 8 parts
35 parts of water.
Wherein: the solid content of the fluorine-silicon modified acrylic emulsion and the epoxy modified acrylic emulsion is 50-60 percent; the average grain diameter of the organic bentonite and the silicon oxide is 200-400 meshes; the dispersant is dispersant 5040; the wetting agent comprises CO-630; the thickening agent is hydroxyethyl cellulose; the defoaming agent is an organic silicon defoaming agent; the film-forming additive is dodecyl alcohol ester; the antifreezing agent is ethylene glycol.
Example 3
The third high weather-resistant waterproof exterior wall coating for buildings provided by the embodiment comprises the following components in parts by mass:
45 parts of fluorine-silicon modified acrylic emulsion
15 parts of epoxy modified acrylic emulsion
10 parts of fluorosilane
10 portions of organic bentonite
Silicon oxide 10 parts
Titanium dioxide 20 parts
Auxiliary agent 1 part
And 15 parts of water.
Wherein: the solid content of the fluorine-silicon modified acrylic emulsion and the epoxy modified acrylic emulsion is 50-60 percent; the average grain diameter of the organic bentonite and the silicon oxide is 200-400 meshes; the dispersant is sodium hexametaphosphate; the wetting agent is CO-630; the thickening agent is hydroxyethyl cellulose; the defoaming agent is mineral oil; the film-forming additive is dodecyl alcohol ester; the antifreezing agent is ethylene glycol.
Example 4
The fourth architectural waterproof exterior wall coating provided by the embodiment comprises the following components in parts by weight:
60 parts of fluorine-silicon modified acrylic emulsion
28 parts of epoxy modified acrylic emulsion
Fluorosilane 13 parts
18 portions of organic bentonite
18 parts of silicon oxide
Titanium dioxide 20 parts
Auxiliary agent 5 parts
And 30 parts of water.
Wherein: the solid content of the fluorine-silicon modified acrylic emulsion and the epoxy modified acrylic emulsion is 50-60 percent; the average grain diameter of the organic bentonite and the silicon oxide is 200-400 meshes; the dispersant is sodium hexametaphosphate; the wetting agent is CO-630; the thickening agent is hydroxyethyl cellulose; the defoaming agent is mineral oil; the film-forming additive is dodecyl alcohol ester; the antifreezing agent is ethylene glycol.
The preparation methods of the fluorosilicone modified acrylic emulsion and the epoxy modified acrylic emulsion are explained as follows:
first, description of preparation method:
1. the preparation method of the fluorine-silicon modified acrylic emulsion comprises the following steps:
(1) uniformly mixing methacrylate, alkyl acrylate, hydroxyalkyl ester and a crosslinking monomer to obtain acrylic emulsion;
(2) dissolving an initiator and an emulsifier with water to obtain an auxiliary agent solution;
(3) dripping the assistant solution into the acrylic emulsion, uniformly mixing, and then adding activated carbon fiber powder;
(4) and (4) adding an organic silicon monomer and a fluorine monomer into the mixture obtained in the step (3), uniformly mixing, and carrying out microwave heating to obtain the fluorine-silicon modified acrylic emulsion.
2. The preparation method of the epoxy modified acrylic emulsion comprises the following steps:
(1) uniformly mixing methacrylate, alkyl acrylate, hydroxyalkyl ester and a crosslinking monomer to obtain acrylic emulsion;
(2) dissolving an initiator and an emulsifier with water to obtain an auxiliary agent solution;
(3) dripping the assistant solution into the acrylic emulsion, uniformly mixing, and then adding activated carbon fiber powder;
(4) and (4) adding epoxy resin into the mixture obtained in the step (3), uniformly mixing, and carrying out microwave heating to obtain the epoxy modified acrylic emulsion.
Second, description of components:
the fluorosilane is heptadecafluorodecyltrimethoxysilane or tridecafluorooctyltrimethoxysilane. The methacrylate is one or more of methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate and amyl methacrylate. The alkyl acrylate is one or more of methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate and amyl acrylate. The hydroxyalkyl ester is one or more of 2-hydroxyethyl acrylate, 3-hydroxypropyl acrylate, 2-hydroxybutyl acrylate, 2-hydroxyethyl methacrylate and 2-hydroxypropyl methacrylate. The crosslinking monomer is one or more of acrylic acid and methacrylic acid. The emulsifier is sodium alkyl benzene sulfonate or ammonium alkyl benzene sulfonate. The initiator is ammonium persulfate, sodium persulfate or potassium persulfate; the organic silicon monomer is one or more of methyl chlorosilane, phenyl chlorosilane, methyl vinyl chlorosilane, ethyl trichlorosilane, propyl trichlorosilane and vinyl trichlorosilane. The fluorine monomer is one or more of m-trifluoromethyl styrene, 3, 5-bis-trifluoromethyl styrene and pentafluorostyrene. The epoxy resin is one or more of bisphenol A type epoxy resin and bisphenol F type oxygen-containing resin. The average grain diameter of the activated carbon fiber powder is 200-400 meshes.
Thirdly, explaining the component proportion:
1. in the preparation method of the fluorine-silicon modified acrylic emulsion, the components in parts by weight are as follows:
30-50 parts of methacrylate
10-20 parts of alkyl acrylate
5-10 parts of hydroxyalkyl ester
5-10 parts of crosslinking monomer
2-5 parts of initiator
2-5 parts of emulsifier
5-10 parts of organic silicon monomer
10-15 parts of fluorine monomer
20-40 parts of water.
2. In the preparation method of the epoxy modified acrylic emulsion, the weight parts of the components are as follows:
30-50 parts of methacrylate
10-20 parts of alkyl acrylate
5-10 parts of hydroxyalkyl ester
5-10 parts of crosslinking monomer
2-5 parts of initiator
2-5 parts of emulsifier
5-10 parts of epoxy resin
20-40 parts of water.
Fourth, reaction conditions are described:
1. in the preparation method of the fluorosilicone modified acrylic emulsion, the microwave heating temperature is 30-50 ℃, the time is 3-5h, and the pH is adjusted to 7-9.
2. In the preparation method of the epoxy modified acrylic emulsion, the temperature of microwave heating is 30-50 ℃, the time is 1-3h, and the pH value is adjusted to 7-9.
Fifth, the preparation methods of the fluorosilicone modified acrylic emulsion and the epoxy modified acrylic emulsion in the above examples 1 to 4 are as follows:
1. the preparation method of the fluorine-silicon modified acrylic emulsion comprises the following steps:
(1) weighing 40 parts of ethyl methacrylate, 10 parts of ethyl acrylate, 10 parts of 2-hydroxyethyl acrylate, 8 parts of methacrylic acid, 3 parts of sodium persulfate, 2 parts of ammonium alkyl benzene sulfonate, 7 parts of vinyl trichlorosilane, 14 parts of m-trifluoromethylstyrene and 40 parts of water in parts by mass. Uniformly mixing ethyl methacrylate, ethyl acrylate, 2-hydroxyethyl acrylate and methacrylic acid to obtain an acrylic emulsion;
(2) dissolving sodium persulfate and ammonium alkyl benzene sulfonate in water to obtain an auxiliary agent solution;
(3) dripping the assistant solution into the acrylic emulsion, uniformly mixing, and then adding activated carbon fiber powder;
(4) and (3) adding vinyltrichlorosilane and m-trifluoromethylstyrene into the mixture obtained in the step (3), uniformly mixing, adjusting the pH to 7-9, and carrying out microwave heating at 30 ℃ for 2 hours to obtain the fluorosilicone modified acrylic emulsion.
2. The preparation method of the epoxy modified acrylic emulsion comprises the following steps:
(1) weighing 40 parts of ethyl methacrylate, 10 parts of ethyl acrylate, 10 parts of acrylic acid-2-hydroxyethyl ester, 8 parts of methacrylic acid, 3 parts of sodium persulfate, 2 parts of ammonium alkyl benzene sulfonate, 3 parts of bisphenol A epoxy resin, 6 parts of bisphenol F type oxygen-containing resin and 40 parts of water in parts by mass. Uniformly mixing ethyl methacrylate, ethyl acrylate, 2-hydroxyethyl acrylate and methacrylic acid to obtain an acrylic emulsion;
(2) dissolving sodium persulfate and ammonium alkyl benzene sulfonate in water to obtain an auxiliary agent solution;
(3) dripping the assistant solution into the acrylic emulsion, uniformly mixing, and then adding activated carbon fiber powder;
(4) and (3) adding bisphenol A epoxy resin and bisphenol F oxygen-containing resin into the mixture obtained in the step (3), uniformly mixing, adjusting the pH to 7-9, and heating for 4 hours at 30 ℃ by using microwaves to obtain the epoxy modified acrylic emulsion.
Preparation of coating and test results
The invention also provides a preparation method of the high-weather-resistance waterproof exterior wall coating for buildings, which comprises the following steps: firstly, uniformly mixing the organobentonite, the silicon oxide and the titanium dioxide, then adding the fluorosilicone modified acrylic emulsion and the epoxy modified acrylic emulsion, uniformly mixing, adding the auxiliary agent, uniformly mixing, and finally adding the fluorosilane.
In the preparation method provided by the invention, the addition timing of the fluorosilane can not only promote the formation of the cross-linked structure, but also protect the cross-linked structure from being damaged to the maximum extent. Accordingly, the reliability of the above conclusion can be verified through comparative experiments. Whether the acrylic emulsion and the epoxy modified acrylic emulsion are added before or between the fluorosilicone modified acrylic emulsion and the epoxy modified acrylic emulsion are added between the epoxy modified acrylic emulsion and the epoxy modified.
And detection shows that the coating is resistant to washing and brushing: examples 1-4 all had > 8000 times.
Artificial aging resistance test: at 800 hours, examples 1-4 did not blister, peel, or crack; at 1000 hours, no foaming, no peeling, and no cracking were observed in example 1, and no foaming, slight peeling, and cracking were observed in examples 2 to 4.
Water resistance test: examples 1 to 4 all had no abnormality for 96 hours.
Stain resistance test: examples 1 to 4 all had < 10%.
Low-temperature stability: examples 1-43 cycles did not deteriorate.
The above embodiments of the present invention do not limit the scope of the present invention.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
Claims (3)
1. A preparation method of a high-weather-resistance waterproof exterior wall coating for buildings is characterized by comprising the following steps: firstly, uniformly mixing organic bentonite, silicon oxide and titanium dioxide, adding the fluorosilicone modified acrylic emulsion and the epoxy modified acrylic emulsion, uniformly mixing, adding the auxiliary agent, uniformly mixing, and finally adding fluorosilane;
the coating comprises the following components in parts by weight:
60 parts of fluorine-silicon modified acrylic emulsion;
28 parts of epoxy modified acrylic emulsion;
13 parts of fluorosilane;
18 parts of organic bentonite;
18 parts of silicon oxide;
20 parts of titanium dioxide;
5 parts of an auxiliary agent;
30 parts of water;
the preparation method of the fluorosilicone modified acrylic emulsion comprises the following steps:
(1) weighing 40 parts of ethyl methacrylate, 10 parts of ethyl acrylate, 10 parts of acrylic acid-2-hydroxyethyl ester, 8 parts of methacrylic acid, 3 parts of sodium persulfate, 2 parts of ammonium alkyl benzene sulfonate, 7 parts of vinyl trichlorosilane, 14 parts of m-trifluoromethyl styrene and 40 parts of water according to parts by mass, and uniformly mixing the ethyl methacrylate, the ethyl acrylate, the acrylic acid-2-hydroxyethyl ester and the methacrylic acid to obtain an acrylic emulsion;
(2) dissolving sodium persulfate and ammonium alkyl benzene sulfonate in water to obtain an auxiliary agent solution;
(3) dripping the assistant solution into the acrylic emulsion, uniformly mixing, and then adding activated carbon fiber powder;
(4) adding vinyl trichlorosilane and m-trifluoromethylstyrene into the mixture obtained in the step (3), uniformly mixing, adjusting the pH to 7-9, and carrying out microwave heating at 30 ℃ for 2h to obtain fluorosilicone modified acrylic emulsion;
the preparation method of the epoxy modified acrylic emulsion comprises the following steps:
(1) weighing 40 parts of ethyl methacrylate, 10 parts of ethyl acrylate, 10 parts of acrylic acid-2-hydroxyethyl ester, 8 parts of methacrylic acid, 3 parts of sodium persulfate, 2 parts of ammonium alkyl benzene sulfonate, 3 parts of bisphenol A epoxy resin, 6 parts of bisphenol F type oxygen-containing resin and 40 parts of water in parts by mass;
uniformly mixing ethyl methacrylate, ethyl acrylate, 2-hydroxyethyl acrylate and methacrylic acid to obtain an acrylic emulsion;
(2) dissolving sodium persulfate and ammonium alkyl benzene sulfonate in water to obtain an auxiliary agent solution;
(3) dripping the assistant solution into the acrylic emulsion, uniformly mixing, and then adding activated carbon fiber powder;
(4) and (3) adding bisphenol A epoxy resin and bisphenol F oxygen-containing resin into the mixture obtained in the step (3), uniformly mixing, adjusting the pH to 7-9, and heating for 4 hours at 30 ℃ by using microwaves to obtain the epoxy modified acrylic emulsion.
2. The method for preparing a highly weather-resistant and waterproof exterior wall coating material for buildings according to claim 1, wherein the fluorosilane is heptadecafluorodecyltrimethoxysilane or tridecafluorooctyltrimethoxysilane.
3. The method for preparing the high weather-resistant waterproof exterior wall coating for buildings according to claim 1, wherein the solid content of the fluorosilicone modified acrylic emulsion and the epoxy modified acrylic emulsion is 50-60%; the average grain diameter of the organic bentonite and the silicon oxide is 200-400 meshes; the auxiliary agent comprises a dispersing agent, a wetting agent, a thickening agent, a defoaming agent, a film forming auxiliary agent and an antifreezing agent, wherein the dispersing agent is sodium hexametaphosphate; the wetting agent is CO-630; the thickening agent is hydroxyethyl cellulose; the defoaming agent is mineral oil; the film-forming additive is dodecyl alcohol ester; the antifreezing agent is ethylene glycol.
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