CN111826046A - Environment-friendly water-based paint for buildings and preparation method thereof - Google Patents
Environment-friendly water-based paint for buildings and preparation method thereof Download PDFInfo
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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
- C09D143/00—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 containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
- C09D143/04—Homopolymers or copolymers of monomers containing silicon
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
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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
- C09D7/20—Diluents or solvents
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- C—CHEMISTRY; METALLURGY
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses an environment-friendly water-based paint for buildings, which comprises the following raw materials in parts by weight: 60-70 parts of silicone-acrylate emulsion, 8-10 parts of perfluorosiloxane resin, 6-9 parts of composite filler, 1-1.4 parts of coupling agent, 2-3 parts of mildew-proof compound, 2-3 parts of hydroxyethyl cellulose, 0.9-1 part of auxiliary agent and 30-40 parts of pure water; the invention also discloses a preparation method of the water-based paint. According to the invention, the silicone-acrylate emulsion and the perfluorosiloxane resin are used as basic film forming substances of the coating, water is used as a solvent, the use of an organic solvent is avoided, the environmental protection requirement is met, and the silicone-acrylate emulsion and the perfluorosiloxane resin are compounded for use, so that the coating has good waterproof performance; by adding the self-made mildew-proof compound into the coating, the durability of the mildew-proof antibacterial effect is improved; the water-based paint prepared by the invention has good waterproof performance and lasting mildew-proof antibacterial effect, is suitable for building exterior walls, and can play an effective protection role.
Description
Technical Field
The invention belongs to the technical field of water-based paint, and particularly relates to environment-friendly water-based paint for buildings and a preparation method thereof.
Background
The solvent-based coating is an important source of VOC, causes great pollution to the environment, brings great harm to human bodies, and has potential safety hazards of flammability, explosiveness and the like in construction, storage and transportation. The water-based paint has the characteristics of environmental protection, energy conservation, safety and convenient action, and is rapidly developed in various countries in the world. The building exterior wall coating can beautify the environment and the room, but the traditional coating has poor washing resistance, the coating can be discolored and fall off after a short time, and the glass curtain wall or tile veneering can bring light pollution, increase the self weight of the building, have potential safety hazards and the like. And as the urban environmental pollution is increasing, the dust pollution and the gas pollution are particularly serious. Building facades, particularly high-rise buildings, are increasingly being eroded. The self-cleaning coating is applied to the exterior wall coating, so that the cleanness and the stain resistance of the building surface can be kept, and the service life of the coating is further prolonged.
Chinese patent with application number CN201610956792.9 discloses an environment-friendly water-based paint for buildings and a preparation method thereof, wherein the paint is prepared from the following raw materials in parts by weight: 25-35 parts of water-soluble acrylate polymer, 20-30 parts of light calcium carbonate, 18-25 parts of talcum powder, 10-15 parts of water glass, 15-20 parts of calcium carbonate, 10-15 parts of titanium dioxide, 15-25 parts of emulsified epoxy resin, 2-4 parts of plasticizer, 5-8 parts of auxiliary agent, 3-6 parts of curing agent, 4-6 parts of defoaming agent, 2-5 parts of flatting agent and 15-25 parts of water. The application only uses the water-based polymer as a film-forming substrate to enable the coating to meet the requirement of environmental protection, but the coating still has defects in the aspects of pollution resistance, bacteria resistance and the like, and needs to be further improved.
Disclosure of Invention
The invention aims to provide an environment-friendly water-based paint for buildings and a preparation method thereof, wherein a silicone acrylic emulsion and perfluorosiloxane resin are used as basic film forming substances of the paint, water is used as a solvent, so that the water-based paint is obtained, the use of an organic solvent is avoided, the environment-friendly requirement is met, and the silicone acrylic emulsion and the perfluorosiloxane resin are compounded for use, so that the paint has good waterproof performance; the self-made mildew-proof compound is added into the coating, so that the prepared mildew-proof compound is a capsule type compound, the mildew-proof agent is positioned in the capsule, and the mildew-proof agent and the nano titanium dioxide are coated, so that the uniform distribution of the mildew-proof agent and the nano titanium dioxide in the coating can be promoted, the slow release performance can be improved, and the durability of the mildew-proof antibacterial effect can be improved; the water-based paint prepared by the invention has good waterproof performance and lasting mildew-proof antibacterial effect, is suitable for building exterior walls, and can play an effective protection role.
The purpose of the invention can be realized by the following technical scheme:
an environment-friendly water-based paint for buildings comprises the following raw materials in parts by weight: 60-70 parts of silicone-acrylate emulsion, 8-10 parts of perfluorosiloxane resin, 6-9 parts of composite filler, 1-1.4 parts of coupling agent, 2-3 parts of mildew-proof compound, 2-3 parts of hydroxyethyl cellulose, 0.9-1 part of auxiliary agent and 30-40 parts of pure water;
the water-based paint is prepared by the following steps:
firstly, mixing silicone-acrylate emulsion, perfluoro-siloxane resin, hydroxyethyl cellulose, pure water and half of auxiliary agent according to parts by weight, adding the mixture into a stirring kettle, and stirring the mixture for 20 to 30 minutes at the stirring speed of 350r/min at normal temperature to obtain a base material;
and secondly, adding the composite filler, the coupling agent, the mildew-proof compound and the rest half of the auxiliary agent into the base material, stirring and mixing at the rotating speed of 500r/min for 40-50min at normal temperature, and then increasing the rotating speed to 2000r/min, stirring and mixing for 8-10min to obtain the water-based paint.
Further, the auxiliary agent comprises a film-forming auxiliary agent, a dispersing agent and a thickening agent, wherein the mass ratio of the film-forming auxiliary agent to the dispersing agent to the thickening agent is 1:1-2: 0.5-0.8.
Further, the film-forming assistant is a compound of dodecyl glycol ester and dipropylene glycol butyl ether, and the mass ratio of the dodecyl glycol ester to the dipropylene glycol butyl ether is 1: 1; the dispersing agent is one or more of hydrophobic modified carboxylic acid sodium salt, polyacrylic acid sodium salt or ammonium salt; the thickener is one or more of diatomite, sodium bentonite, polyurethane, polyvinyl alcohol or polyacrylamide.
Further, the composite filler is a compound of nano calcium carbonate, nano zinc oxide and montmorillonite, and the mass ratio of the nano calcium carbonate to the nano zinc oxide to the montmorillonite is 10:2-3: 8-9.
Further, the coupling agent is a silane coupling agent KH550 or KH 560.
Further, the mildew-proof compound is prepared by the following method:
s1, weighing soybean peptide, and dissolving the soybean peptide in deionized water to form base liquid with the mass fraction of 18-20%;
s2, weighing the polymer micelle, tetrabutyl titanate, tetrahydrofuran and 4-chlorothymol according to a certain proportion, putting the mixture into a beaker together, and magnetically stirring for 22-24 hours to prepare a mixed solution;
s3, injecting the mixed solution into the base solution at the speed of 1uL per minute by adopting a liquid-transferring gun injection mode under magnetic stirring, and continuing to stir for 48 hours by magnetic stirring after complete injection to prepare a mildew-proof compound;
further, in the step S2, the dosage ratio of the high molecular micelle, tetrabutyl titanate, tetrahydrofuran and 4-chlorothymol is 100mL:15-18g:5-6g:2-3 g; in step S3, the volume ratio of the mixed solution to the base solution was 1: 1.
A preparation method of an environment-friendly water-based paint for buildings comprises the following steps:
firstly, mixing silicone-acrylate emulsion, perfluoro-siloxane resin, hydroxyethyl cellulose, pure water and half of auxiliary agent according to parts by weight, adding the mixture into a stirring kettle, and stirring the mixture for 20 to 30 minutes at the stirring speed of 350r/min at normal temperature to obtain a base material;
and secondly, adding the composite filler, the coupling agent, the mildew-proof compound and the rest half of the auxiliary agent into the base material, stirring and mixing at the rotating speed of 500r/min for 40-50min at normal temperature, and then increasing the rotating speed to 2000r/min, stirring and mixing for 8-10min to obtain the water-based paint.
The invention has the beneficial effects that:
the invention adds the self-made mildew-proof compound into the water-based paint, and the prepared mildew-proof compound is a capsule compound and nano TiO generated by the reaction of titanate2In the polymer micelleInterfacial polymerization occurs between the water chain segments, so that the inorganic titanium dioxide nano particles are mainly distributed in the middle layer, the soybean peptide is mainly distributed in the outer shell layer of the capsule, and the mildew preventive is distributed in the microcapsule; the mildew preventive positioned in the capsule is coated by the polymer micelle and the titanium dioxide layer, so that the slow release effect is good, the coating is endowed with good lasting mildew resistance, and the nano titanium dioxide particles positioned in the middle layer can also play a synergistic antibacterial effect with the mildew preventive coated by the microcapsule core, so that the mildew resistance is better; in addition, the nano titanium dioxide particles are easy to form a super-hydrophilic surface under the irradiation of ultraviolet light, and when the mildew-proof compound is uniformly dispersed in the coating, the super-hydrophilic surface is formed on the surface of the coating, so that the coating has self-cleaning performance; after the mildew preventive and the nano titanium dioxide are coated, the uniform distribution of the mildew preventive and the nano titanium dioxide in the coating can be promoted, the slow release performance can be improved, and the durability of the mildew-proof antibacterial effect can be improved;
according to the invention, the silicone-acrylate emulsion and the perfluorosiloxane resin are used as basic film forming substances of the coating, and water is used as a solvent, so that the water-based coating is obtained, the use of an organic solvent is avoided, the environment-friendly requirement is met, and the silicone-acrylate emulsion and the perfluorosiloxane resin are compounded for use, so that the coating has good waterproof performance; the self-made mildew-proof compound is added into the coating, so that the prepared mildew-proof compound is a capsule type compound, the mildew-proof agent is positioned in the capsule, and the mildew-proof agent and the nano titanium dioxide are coated, so that the uniform distribution of the mildew-proof agent and the nano titanium dioxide in the coating can be promoted, the slow release performance can be improved, and the durability of the mildew-proof antibacterial effect can be improved; the water-based paint prepared by the invention has good waterproof performance and lasting mildew-proof antibacterial effect, is suitable for building exterior walls, and can play an effective protection role.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
An environment-friendly water-based paint for buildings comprises the following raw materials in parts by weight: 60-70 parts of silicone-acrylate emulsion, 8-10 parts of perfluorosiloxane resin, 6-9 parts of composite filler, 1-1.4 parts of coupling agent, 2-3 parts of mildew-proof compound, 2-3 parts of hydroxyethyl cellulose, 0.9-1 part of auxiliary agent and 30-40 parts of pure water;
the auxiliary agent comprises a film-forming auxiliary agent, a dispersing agent and a thickening agent, wherein the mass ratio of the film-forming auxiliary agent to the dispersing agent to the thickening agent is 1:1-2: 0.5-0.8;
the film-forming assistant is a compound of dodecyl glycol ester and dipropylene glycol butyl ether, and the mass ratio of the dodecyl glycol ester to the dipropylene glycol butyl ether is 1: 1; the dispersing agent is one or more of hydrophobic modified carboxylic acid sodium salt, polyacrylic acid sodium salt or ammonium salt; the thickening agent is one or more of diatomite, sodium bentonite, polyurethane, polyvinyl alcohol or polyacrylamide;
the composite filler is a compound of nano calcium carbonate, nano zinc oxide and montmorillonite, and the mass ratio of the nano calcium carbonate to the nano zinc oxide to the montmorillonite is 10:2-3: 8-9;
the coupling agent is a silane coupling agent KH550 or KH 560;
the mildew-proof compound is prepared by the following method:
s1, weighing soybean peptide, and dissolving the soybean peptide in deionized water to form base liquid with the mass fraction of 18-20%;
s2, weighing the polymer micelle, tetrabutyl titanate, tetrahydrofuran and 4-chlorothymol (mildew preventive) according to a certain proportion, putting the mixture into a beaker together, and magnetically stirring for 22-24 hours to prepare a mixed solution;
wherein the dosage ratio of the high molecular micelle, tetrabutyl titanate, tetrahydrofuran and 4-chlorothymol is 100mL, 15-18g, 5-6g and 2-3 g;
s3, injecting the mixed solution into the base solution at the speed of 1uL per minute by adopting a liquid-transferring gun injection mode under magnetic stirring, and continuing to stir for 48 hours by magnetic stirring after complete injection to prepare a mildew-proof compound;
wherein the volume ratio of the mixed solution to the base solution is 1: 1;
the obtained mildew-proof compoundThe compound is a capsule compound, and the nano TiO generated by the reaction of titanate2Interfacial polymerization is carried out between hydrophilic and hydrophobic chain segments of the high molecular micelle, so that the inorganic titanium dioxide nano particles are mainly distributed in the middle layer, the soybean peptide is mainly distributed in the outer shell layer of the capsule, and the mildew preventive is distributed in the microcapsule; the mildew preventive positioned in the capsule is coated by the polymer micelle and the titanium dioxide layer, so that the slow release effect is good, the coating is endowed with good lasting mildew resistance, and the nano titanium dioxide particles positioned in the middle layer can also play a synergistic antibacterial effect with the mildew preventive coated by the microcapsule core, so that the mildew resistance is better; in addition, the nano titanium dioxide particles are easy to form a super-hydrophilic surface under the irradiation of ultraviolet light, and when the mildew-proof compound is uniformly dispersed in the coating, the super-hydrophilic surface is formed on the surface of the coating, so that the coating has self-cleaning performance; after the mildew preventive and the nano titanium dioxide are coated, the uniform distribution of the mildew preventive and the nano titanium dioxide in the coating can be promoted, the slow release performance can be improved, and the durability of the mildew-proof antibacterial effect can be improved;
the processing method of the water-based paint comprises the following steps:
firstly, mixing silicone-acrylate emulsion, perfluoro-siloxane resin, hydroxyethyl cellulose, pure water and half of auxiliary agent according to parts by weight, adding the mixture into a stirring kettle, and stirring the mixture for 20 to 30 minutes at the stirring speed of 350r/min at normal temperature to obtain a base material;
and secondly, adding the composite filler, the coupling agent, the mildew-proof compound and the rest half of the auxiliary agent into the base material, stirring and mixing at the rotating speed of 500r/min for 40-50min at normal temperature, and then increasing the rotating speed to 2000r/min, stirring and mixing for 8-10min to obtain the water-based paint.
Example 1
An environment-friendly water-based paint for buildings comprises the following raw materials in parts by weight: 60 parts of silicone-acrylate emulsion, 8 parts of perfluorosiloxane resin, 6 parts of composite filler, 1 part of coupling agent, 2 parts of mildew-proof compound, 2 parts of hydroxyethyl cellulose, 0.9 part of auxiliary agent and 30 parts of pure water;
the water-based paint is prepared by the following steps:
firstly, mixing silicone-acrylate emulsion, perfluoro-siloxane resin, hydroxyethyl cellulose, pure water and half of auxiliary agent according to parts by weight, adding the mixture into a stirring kettle, and stirring the mixture for 20min at the stirring speed of 350r/min at normal temperature to obtain a base material;
and secondly, adding the composite filler, the coupling agent, the mildew-proof compound and the rest half of the auxiliary agent into the base material, stirring and mixing at the rotating speed of 500r/min for 40min at normal temperature, and then increasing the rotating speed to 2000r/min, stirring and mixing for 8min to obtain the water-based paint.
Example 2
An environment-friendly water-based paint for buildings comprises the following raw materials in parts by weight: 65 parts of silicone-acrylate emulsion, 9 parts of perfluorosiloxane resin, 7.5 parts of composite filler, 1.2 parts of coupling agent, 2.5 parts of mildew-proof compound, 2.5 parts of hydroxyethyl cellulose, 0.95 part of assistant and 35 parts of pure water;
the water-based paint is prepared by the following steps:
firstly, mixing silicone-acrylate emulsion, perfluoro-siloxane resin, hydroxyethyl cellulose, pure water and half of auxiliary agent according to parts by weight, adding the mixture into a stirring kettle, and stirring the mixture for 25min at the stirring speed of 350r/min at normal temperature to obtain a base material;
and secondly, adding the composite filler, the coupling agent, the mildew-proof compound and the rest half of the auxiliary agent into the base material, stirring and mixing for 45min at the rotating speed of 500r/min at normal temperature, and then increasing the rotating speed to 2000r/min, stirring and mixing for 9min to obtain the water-based paint.
Example 3
An environment-friendly water-based paint for buildings comprises the following raw materials in parts by weight: 70 parts of silicone-acrylate emulsion, 10 parts of perfluorosiloxane resin, 9 parts of composite filler, 1.4 parts of coupling agent, 3 parts of mildew-proof compound, 3 parts of hydroxyethyl cellulose, 1 part of auxiliary agent and 40 parts of pure water;
the water-based paint is prepared by the following steps:
firstly, mixing silicone-acrylate emulsion, perfluoro-siloxane resin, hydroxyethyl cellulose, pure water and half of auxiliary agent according to parts by weight, adding the mixture into a stirring kettle, and stirring the mixture for 30min at the stirring speed of 350r/min at normal temperature to obtain a base material;
and secondly, adding the composite filler, the coupling agent, the mildew-proof compound and the rest half of the auxiliary agent into the base material, stirring and mixing at the normal temperature at the rotating speed of 500r/min for 50min, and then increasing the rotating speed to 2000r/min, stirring and mixing for 10min to obtain the water-based paint.
Comparative example
The compound mildew preventive in the embodiment 1 is replaced by common 4-chloro thymol, and other raw materials and the preparation process are unchanged.
The coatings prepared in examples 1-3 and comparative examples were tested for the following properties:
spraying each coating on the surface of an aluminum plate, and drying and curing at 120 ℃ for 10min to obtain each coating;
the hardness of the coating is tested according to GB/T6739-1996 pencil determination method for film hardness, and the compressive strength of the coating is tested; testing the initial mildew-proof grade and the mildew-proof grade after 6 months; the test results are given in the following table:
as can be seen from the above table, the hardness of the coatings prepared in examples 1-3 all reach B level, and the compressive strength is 10.32-10.43MPa, which indicates that the coating prepared by the invention can meet the use requirements in terms of mechanical strength; the initial mildew-proof grade of the coatings prepared in the embodiments 1 to 3 reaches 0 grade, and the mildew-proof grade after half a year is 0 grade, which shows that the coatings prepared by the invention have good mildew-proof performance and mildew-proof durability; the composite mildew preventive prepared by processing the mildew preventive is described by combining with a comparative example, so that the uniform distribution of the mildew preventive and the nano titanium dioxide in the coating can be promoted, and the durability of the mildew preventive effect can be improved.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. The environment-friendly water-based paint for buildings is characterized by comprising the following raw materials in parts by weight: 60-70 parts of silicone-acrylate emulsion, 8-10 parts of perfluorosiloxane resin, 6-9 parts of composite filler, 1-1.4 parts of coupling agent, 2-3 parts of mildew-proof compound, 2-3 parts of hydroxyethyl cellulose, 0.9-1 part of auxiliary agent and 30-40 parts of pure water;
the water-based paint is prepared by the following steps:
firstly, mixing silicone-acrylate emulsion, perfluoro-siloxane resin, hydroxyethyl cellulose, pure water and half of auxiliary agent according to parts by weight, adding the mixture into a stirring kettle, and stirring the mixture for 20 to 30 minutes at the stirring speed of 350r/min at normal temperature to obtain a base material;
and secondly, adding the composite filler, the coupling agent, the mildew-proof compound and the rest half of the auxiliary agent into the base material, stirring and mixing at the rotating speed of 500r/min for 40-50min at normal temperature, and then increasing the rotating speed to 2000r/min, stirring and mixing for 8-10min to obtain the water-based paint.
2. The environment-friendly waterborne coating for buildings as claimed in claim 1, wherein the auxiliary comprises a film-forming auxiliary, a dispersant and a thickener, and the mass ratio of the film-forming auxiliary, the dispersant and the thickener is 1:1-2: 0.5-0.8.
3. The environment-friendly water-based paint for buildings as claimed in claim 2, wherein the film forming assistant is a compound of dodecyl glycol ester and dipropylene glycol butyl ether, and the mass ratio of the dodecyl ester to the dipropylene glycol butyl ether is 1: 1; the dispersing agent is one or more of hydrophobic modified carboxylic acid sodium salt, polyacrylic acid sodium salt or ammonium salt; the thickener is one or more of diatomite, sodium bentonite, polyurethane, polyvinyl alcohol or polyacrylamide.
4. The environment-friendly water-based paint for buildings as claimed in claim 1, wherein the composite filler is a compound of nano calcium carbonate, nano zinc oxide and montmorillonite, and the mass ratio of the nano calcium carbonate to the nano zinc oxide to the montmorillonite is 10:2-3: 8-9.
5. The environment-friendly waterborne coating for buildings according to claim 1, wherein the coupling agent is a silane coupling agent KH550 or KH 560.
6. The environment-friendly waterborne coating for buildings as claimed in claim 1, wherein the mildew-proof compound is prepared by the following method:
s1, weighing soybean peptide, and dissolving the soybean peptide in deionized water to form base liquid with the mass fraction of 18-20%;
s2, weighing the polymer micelle, tetrabutyl titanate, tetrahydrofuran and 4-chlorothymol according to a certain proportion, putting the mixture into a beaker together, and magnetically stirring for 22-24 hours to prepare a mixed solution;
and S3, injecting the mixed solution into the base solution at the speed of 1uL per minute by adopting a liquid transfer gun injection mode under magnetic stirring, and continuing to carry out magnetic stirring for 48 hours after complete injection to obtain the mildew-proof compound.
7. The environment-friendly water-based paint for buildings as claimed in claim 6, wherein the amount ratio of the polymeric micelle, tetrabutyl titanate, tetrahydrofuran and 4-chlorothymol in step S2 is 100mL:15-18g:5-6g:2-3 g; in step S3, the volume ratio of the mixed solution to the base solution was 1: 1.
8. The preparation method of the environment-friendly water-based paint for buildings as claimed in claim 1, which is characterized by comprising the following steps:
firstly, mixing silicone-acrylate emulsion, perfluoro-siloxane resin, hydroxyethyl cellulose, pure water and half of auxiliary agent according to parts by weight, adding the mixture into a stirring kettle, and stirring the mixture for 20 to 30 minutes at the stirring speed of 350r/min at normal temperature to obtain a base material;
and secondly, adding the composite filler, the coupling agent, the mildew-proof compound and the rest half of the auxiliary agent into the base material, stirring and mixing at the rotating speed of 500r/min for 40-50min at normal temperature, and then increasing the rotating speed to 2000r/min, stirring and mixing for 8-10min to obtain the water-based paint.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115368791A (en) * | 2022-09-24 | 2022-11-22 | 河北建研节能设备有限公司 | Low-surface-energy bionic hydrophobic self-cleaning coating and preparation method thereof |
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Application publication date: 20201027 |