CN114045071B - Building aluminum veneer curtain wall finish paint and preparation method thereof - Google Patents

Building aluminum veneer curtain wall finish paint and preparation method thereof Download PDF

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CN114045071B
CN114045071B CN202210039715.2A CN202210039715A CN114045071B CN 114045071 B CN114045071 B CN 114045071B CN 202210039715 A CN202210039715 A CN 202210039715A CN 114045071 B CN114045071 B CN 114045071B
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parts
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curtain wall
aluminum veneer
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CN114045071A (en
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梁拓
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Foshan Nanhai Yucheng Decoration Materials Co ltd
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Foshan Nanhai Yucheng Decoration Materials Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C09D127/16—Homopolymers or copolymers of vinylidene fluoride
    • 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
    • C09D5/08—Anti-corrosive paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres

Abstract

The invention belongs to the technical field of finish paint for buildings, and particularly discloses a finish paint for a building aluminum veneer curtain wall and a preparation method thereof, wherein the finish paint for the building aluminum veneer curtain wall comprises a component A and a component B, and the component A is prepared from the following raw materials: fluorocarbon resin, filler, modified carbon nano tube, methyl methacrylate resin, silica sol, dispersant, 3- (trihydroxy silicon base) propyl methyl phosphate, 4-aminobenzene boric acid, diethylenetriamine, ethylene glycol monobutyl ether, defoamer, thickener, dioctyl phthalate, pH regulator and solvent; the component B consists of hexamethylene diisocyanate resin and sodium hexametaphosphate. The finish paint has good heat insulation and wear resistance on the basis of good corrosion resistance.

Description

Building aluminum veneer curtain wall finish paint and preparation method thereof
Technical Field
The invention relates to the technical field of finish paint for buildings, in particular to finish paint for a building aluminum veneer curtain wall and a preparation method thereof.
Background
With the development of the building industry, people have higher and higher requirements on building curtain walls, and the building curtain walls need to have better performances such as flame retardance, heat insulation, corrosion resistance, wear resistance and the like.
The fluorocarbon coating is a coating taking fluororesin as a main film forming substance; also known as fluorocarbon paint, fluorine resin paint, etc. Among various coatings, the fluororesin coating has various particularly excellent properties due to the introduction of fluorine with high electronegativity and strong carbon-fluorine bond energy. The fluorocarbon coating is sprayed on the building curtain wall to form finish paint, so that the performance of the curtain wall can be improved.
Patent CN103468070A discloses a conductive nano fluorocarbon coating, which is prepared by mixing the following raw materials by weight percent: 16-30% of modified carbon nano-tube, 4-10% of modified carbon nano-fiber, 40-60% of polyvinyl fluoride resin, 5-10% of 1-nitropyrrolidone, 10-20% of isobutyl formate, 2-5% of xylene, 1-5% of propylene diacetate, 0.25-1% of polydimethylsiloxane and 0.25-1% of polymethylphenylsiloxane. The carbon nanotubes are modified and added into a formula system to be mutually bridged with the carbon nanofibers to form a conductive network structure, so that the product has high conductivity.
The heat insulation and wear resistance of the existing finish paint for the building curtain wall needs to be improved urgently.
Disclosure of Invention
The invention provides a finish paint for a building aluminum veneer curtain wall and a preparation method thereof, wherein the finish paint has good heat insulation and wear resistance.
The invention adopts the following technical scheme for solving the technical problems:
the building aluminum veneer curtain wall finish paint comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 6-10: 1;
the component A is prepared from the following raw materials in parts by weight: 30-50 parts of fluorocarbon resin, 12-20 parts of filler, 3-7 parts of modified carbon nanotube, 4-8 parts of methyl methacrylate resin, 1-3 parts of silica sol, 1.5-2.5 parts of dispersant, 1.2-2 parts of 3- (trihydroxy silicon base) methyl propyl phosphate, 1-1.6 parts of 4-aminobenzene boric acid, 1-1.8 parts of diethylenetriamine, 0.6-1.2 parts of ethylene glycol butyl ether, 0.5-0.9 part of defoamer, 0.3-0.6 part of thickener, 0.2-0.6 part of dioctyl phthalate, 0.05-0.15 part of pH regulator and 12-20 parts of solvent;
the component B comprises 80-95 parts by weight of hexamethylene diisocyanate resin and 5-12 parts by weight of sodium hexametaphosphate.
As a preferable scheme, the component A is prepared from the following raw materials in parts by weight: 35-50 parts of fluorocarbon resin, 15-20 parts of filler, 4-7 parts of modified carbon nanotube, 4-7 parts of methyl methacrylate resin, 1-2.5 parts of silica sol, 1.5-2.2 parts of dispersant, 1.5-2 parts of 3- (trihydroxy silicon base) methyl propyl phosphate, 1.2-1.6 parts of 4-aminobenzene boric acid, 1-1.5 parts of diethylenetriamine, 0.8-1.2 parts of ethylene glycol monobutyl ether, 0.6-0.9 part of defoamer, 0.4-0.6 part of thickener, 0.2-0.5 part of dioctyl phthalate, 0.05-0.12 part of pH regulator and 12-16 parts of solvent.
As a preferable scheme, the component A is prepared from the following raw materials in parts by weight: 45 parts of fluorocarbon resin, 18 parts of filler, 6 parts of modified carbon nanotube, 5 parts of methyl methacrylate resin, 2 parts of silica sol, 2 parts of dispersant, 1.8 parts of 3- (trihydroxy silicon-based) propyl methyl phosphate, 1.5 parts of 4-aminobenzene boric acid, 1.2 parts of diethylenetriamine, 1 part of ethylene glycol butyl ether, 0.8 part of defoaming agent, 0.5 part of thickener, 0.4 part of dioctyl phthalate, 0.1 part of pH regulator and 14.7 parts of solvent.
Preferably, the component B consists of 89 parts by weight of hexamethylene diisocyanate resin and 11 parts by weight of sodium hexametaphosphate.
As a preferable scheme, the preparation method of the modified carbon nanotube comprises the following steps:
s1, adding 4-12 parts by weight of single-walled carbon nanotubes and 1-4 parts by weight of oxalic acid into 20-50 parts by weight of absolute ethyl alcohol, uniformly dispersing, adding 0.5-3 parts by weight of stearic acid, heating to 65-80 ℃, and performing ultrasonic treatment to obtain a carbon nanotube mixed solution;
s2, adding 4-10 parts by weight of m-pentadecylphenol, 2-5 parts by weight of 3, 3, 3-trifluoropropyltrimethoxysilane and 2-5 parts by weight of tridecafluorooctyltriethoxysilane into a reaction kettle, adding 0.05-0.2 part by weight of organic bismuth, and stirring at the rotating speed of 100-400 rpm at the temperature of 80-95 ℃ for 2-8 hours to obtain a modifier;
s3, dropping 2-5 parts by weight of modifier into 4-10 parts by weight of carbon nanotube mixed solution, stirring at 70-90 ℃ and 200-600 rpm for 1-4 h, filtering, and drying to obtain the modified carbon nanotube.
According to the invention, the modified carbon nanotube capable of remarkably improving wear resistance and heat insulation performance is obtained by performing ultrasonic pretreatment on the single-walled carbon nanotube by oxalic acid and stearic acid in absolute ethyl alcohol and then performing modification treatment by using a modifier prepared from pentadecyl phenol (cardanol) and a fluorine-containing silane coupling agent.
The modified carbon nanotubes prepared by different modification methods are different in improvement of wear resistance and heat insulation performance, for example, the modified carbon nanotubes prepared by patent CN103468070A and the carbon nanofibers are mutually bridged to form a conductive network structure, so that the product has high conductivity.
The inventor finds that the modified carbon nanotube prepared by the preparation method of the modified carbon nanotube can remarkably improve the heat insulation and wear resistance compared with the modified carbon nanotube prepared by other methods.
The addition of the modified carbon nano tube can effectively improve the film forming property of fluorocarbon resin, increase the crosslinking density of a coating and obviously improve the hardness of the coating, the modified carbon nano tube can be effectively filled in micropores generated in the curing process, the occurrence of the micropores is reduced, the modified carbon nano tube can be uniformly dispersed in a system, the generated micropores can be effectively filled, and the agglomeration effect cannot occur.
As a preferable scheme, the ultrasonic treatment power in S1 is 200-800W, and the ultrasonic treatment time is 20-45 min.
As a preferable scheme, the solvent is prepared from butyl acetate and propylene glycol methyl ether acetate according to the weight ratio of 1: 0.2-2.
As a preferable scheme, the fluorocarbon resin is polyvinylidene fluoride resin, the thickener is hydroxyethyl cellulose, and the pH regulator is triethanolamine.
As a preferable scheme, the preparation method of the filler comprises the following steps:
s11, adding 40-60 parts by weight of silicon dioxide, 20-50 parts by weight of hollow glass beads and 10-30 parts by weight of lithopone into a ball mill, and ball-milling at the rotating speed of 400-800 rpm for 1-4 hours to obtain mixed powder;
s12, adding 10-30 parts by weight of mixed powder into 50-90 parts by weight of lanthanum nitrate solution, adding 0.5-3 parts by weight of vinyltriethoxysilane, stirring at a rotating speed of 200-800 rpm for 20-60 min at 80-95 ℃, performing ultrasonic treatment at 200-800W for 20-35 min, filtering, and drying to obtain the filler.
According to the invention, the filler capable of remarkably improving the heat insulation and wear resistance is obtained by ball-milling and mixing silicon dioxide, hollow glass beads and lithopone and then treating the mixture by lanthanum nitrate solution and coupling agent.
The invention also provides a preparation method of the finish paint for the building aluminum veneer curtain wall, which comprises the following steps:
s21, adding fluorocarbon resin, methyl methacrylate resin, a dispersing agent, a thickening agent, dioctyl phthalate, 3- (trihydroxy silicon-based) propyl methyl phosphate, 4-aminophenylboronic acid and a solvent into a reaction kettle, stirring at the rotating speed of 400-1000 rpm for 40-80 min, adding a filler, a modified carbon nanotube, silica sol, diethylenetriamine, ethylene glycol monobutyl ether, a defoaming agent and a pH regulator, and stirring at the rotating speed of 800-1500 rpm for 10-30 min to obtain a component A;
s22, uniformly mixing hexamethylene diisocyanate resin and sodium hexametaphosphate to obtain a component B;
and S23, uniformly stirring the component A and the component B according to the weight ratio to obtain the finishing paint for the building aluminum veneer curtain wall.
The invention has the beneficial effects that: the finish paint has good heat insulation and wear resistance on the basis of good corrosion resistance, the heat insulation and wear resistance are obviously improved by adding the modified carbon nano tubes and the filler into a formula system, the addition of the modified carbon nano tubes can effectively improve the film forming property of fluorocarbon resin, increase the crosslinking density of a coating, effectively fill in micropores generated in a curing process and reduce the appearance of the micropores, and the modified carbon nano tubes can be uniformly dispersed in the system, can effectively fill the generated micropores and cannot generate agglomeration.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but 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.
In the present invention, the parts are all parts by weight unless otherwise specified.
Example 1
The building aluminum veneer curtain wall finish paint comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 9: 1.
the component A is prepared from the following raw materials in parts by weight: 45 parts of polyvinylidene fluoride resin, 18 parts of filler, 6 parts of modified carbon nanotube, 5 parts of methyl methacrylate resin, 2 parts of silica sol, 2 parts of dispersing agent, 1.8 parts of 3- (trihydroxy silicon base) propyl methyl phosphate, 1.5 parts of 4-aminobenzene boric acid, 1.2 parts of diethylenetriamine, 1 part of ethylene glycol butyl ether, 0.8 part of defoaming agent, 0.5 part of hydroxyethyl cellulose, 0.4 part of dioctyl phthalate, 0.1 part of triethanolamine and 14.7 parts of solvent.
The solvent is prepared from butyl acetate and propylene glycol methyl ether acetate according to the weight ratio of 1: 0.5.
The defoaming agent is BYK-141.
The dispersant is BYK-110.
The polyvinylidene fluoride resin is purchased from Japan Dajin, and the brand number is: GK-570: the solid fluorine content was 28%, the solid hydroxyl value was 60mgKOH/g, the solid acid value was 3mgKOH/g, and the viscosity (25 ℃ C.) was 1500 mPaS.
And the component B consists of 89 parts by weight of hexamethylene diisocyanate resin and 11 parts by weight of sodium hexametaphosphate.
The preparation method of the modified carbon nano tube comprises the following steps:
s1, adding 10 parts by weight of single-walled carbon nanotube and 2 parts by weight of oxalic acid into 37 parts by weight of absolute ethyl alcohol, uniformly dispersing, adding 1 part by weight of stearic acid, heating to 75 ℃, and carrying out ultrasonic treatment at 500W for 30min to obtain a carbon nanotube mixed solution;
s2, adding 8 parts by weight of m-pentadecylphenol, 4 parts by weight of 3, 3, 3-trifluoropropyltrimethoxysilane and 3 parts by weight of tridecafluorooctyltriethoxysilane into a reaction kettle, adding 0.1 part by weight of organic bismuth, and stirring at 90 ℃ and 300rpm for 5 hours to obtain a modifier;
s3, dropping 4 parts by weight of modifier into 8 parts by weight of carbon nanotube mixed solution, stirring at the rotating speed of 400rpm at the temperature of 80 ℃ for 3 hours, filtering and drying to obtain the modified carbon nanotube.
The addition of the modified carbon nano tube can effectively improve the film forming property of fluorocarbon resin, increase the crosslinking density of a coating, effectively fill in micropores generated in the curing process and reduce the appearance of the micropores, and the modified carbon nano tube can be uniformly dispersed in a system, can effectively fill the generated micropores and cannot generate an agglomeration effect.
The preparation method of the filler comprises the following steps:
s11, adding 50 parts by weight of silicon dioxide, 30 parts by weight of hollow glass beads and 20 parts by weight of lithopone into a ball mill, and carrying out ball milling at the rotating speed of 500rpm for 3 hours to obtain mixed powder;
s12, adding 20 parts by weight of the mixed powder into 79 parts by weight of lanthanum nitrate solution, adding 1 part by weight of vinyltriethoxysilane, stirring at 90 ℃ at a rotating speed of 500rpm for 50min, performing ultrasonic treatment at 500W for 30min, filtering, and drying to obtain the filler.
The preparation method of the finish paint for the building aluminum veneer curtain wall comprises the following steps:
s21, adding fluorocarbon resin, methyl methacrylate resin, a dispersing agent, a thickening agent, dioctyl phthalate, 3- (trihydroxy silicon-based) propyl methyl phosphate, 4-aminophenylboronic acid and a solvent into a reaction kettle, stirring at the rotating speed of 800rpm for 60min, adding a filler, a modified carbon nanotube, silica sol, diethylenetriamine, ethylene glycol butyl ether, a defoaming agent and a pH regulator, and stirring at the rotating speed of 1000rpm for 20min to obtain a component A;
s22, uniformly mixing hexamethylene diisocyanate resin and sodium hexametaphosphate to obtain a component B;
and S23, uniformly stirring the component A and the component B according to the weight ratio to obtain the finishing paint for the building aluminum veneer curtain wall.
Example 2
The building aluminum veneer curtain wall finish paint comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 8: 1.
the component A is prepared from the following raw materials in parts by weight: 45.25 parts of polyvinylidene fluoride resin, 12 parts of filler, 7 parts of modified carbon nanotube, 4 parts of methyl methacrylate resin, 3 parts of silica sol, 1.5 parts of dispersing agent, 2 parts of 3- (trihydroxy silicon base) propyl methyl phosphate, 1 part of 4-aminobenzene boric acid, 1.8 parts of diethylenetriamine, 0.6 part of ethylene glycol butyl ether, 0.9 part of defoaming agent, 0.3 part of hydroxyethyl cellulose, 0.6 part of dioctyl phthalate, 0.05 part of triethanolamine and 20 parts of solvent.
The solvent is prepared from butyl acetate and propylene glycol methyl ether acetate according to the weight ratio of 1: 0.5.
The defoaming agent is BYK-141.
The dispersant is BYK-110.
The polyvinylidene fluoride resin is purchased from Japan Dajin, and has the mark number: GK-570: the solid fluorine content was 28%, the solid hydroxyl value was 60mgKOH/g, the solid acid value was 3mgKOH/g, and the viscosity (25 ℃ C.) was 1500 mPaS.
And the component B consists of 89 parts by weight of hexamethylene diisocyanate resin and 11 parts by weight of sodium hexametaphosphate.
The preparation method of the modified carbon nano tube comprises the following steps:
s1, adding 8 parts by weight of single-walled carbon nanotube and 3 parts by weight of oxalic acid into 37.8 parts by weight of absolute ethyl alcohol, uniformly dispersing, adding 1.2 parts by weight of stearic acid, heating to 75 ℃, and carrying out ultrasonic treatment at 600W for 25min to obtain a carbon nanotube mixed solution;
s2, adding 10 parts by weight of m-pentadecylphenol, 4 parts by weight of 3, 3, 3-trifluoropropyltrimethoxysilane and 4 parts by weight of tridecafluorooctyltriethoxysilane into a reaction kettle, adding 0.1 part by weight of organic bismuth, and stirring at the rotating speed of 300rpm at 85 ℃ for 6 hours to obtain a modifier;
s3, dropping 3 parts by weight of modifier into 8 parts by weight of carbon nanotube mixed solution, stirring at the rotating speed of 600rpm for 2 hours at the temperature of 70 ℃, filtering and drying to obtain the modified carbon nanotube.
The preparation method of the filler comprises the following steps:
s11, adding 60 parts by weight of silicon dioxide, 30 parts by weight of hollow glass beads and 10 parts by weight of lithopone into a ball mill, and carrying out ball milling at the rotating speed of 600rpm for 3 hours to obtain mixed powder;
s12, adding 25 parts by weight of the mixed powder into 73.5 parts by weight of lanthanum nitrate solution, adding 1.5 parts by weight of vinyltriethoxysilane, stirring at a rotating speed of 600rpm for 50min at a temperature of 80 ℃, performing ultrasonic treatment at 400W for 30min, filtering, and drying to obtain the filler.
The preparation method of the finish paint for the building aluminum veneer curtain wall comprises the following steps:
s21, adding fluorocarbon resin, methyl methacrylate resin, a dispersing agent, a thickening agent, dioctyl phthalate, 3- (trihydroxy silicon-based) propyl methyl phosphate, 4-aminophenylboronic acid and a solvent into a reaction kettle, stirring at the rotating speed of 800rpm for 60min, adding a filler, a modified carbon nanotube, silica sol, diethylenetriamine, ethylene glycol butyl ether, a defoaming agent and a pH regulator, and stirring at the rotating speed of 1000rpm for 20min to obtain a component A;
s22, uniformly mixing hexamethylene diisocyanate resin and sodium hexametaphosphate to obtain a component B;
and S23, uniformly stirring the component A and the component B according to the weight ratio to obtain the finishing paint for the building aluminum veneer curtain wall.
Example 3
The building aluminum veneer curtain wall finish paint comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 9: 1.
the component A is prepared from the following raw materials in parts by weight: 47.05 parts of polyvinylidene fluoride resin, 17 parts of filler, 3 parts of modified carbon nanotube, 8 parts of methyl methacrylate resin, 1 part of silica sol, 2.5 parts of dispersing agent, 1.2 parts of 3- (trihydroxy silicon base) propyl methyl phosphate, 1.6 parts of 4-aminobenzene boric acid, 1 part of diethylenetriamine, 1.2 parts of ethylene glycol butyl ether, 0.5 part of defoaming agent, 0.6 part of hydroxyethyl cellulose, 0.2 part of dioctyl phthalate, 0.15 part of triethanolamine and 15 parts of solvent.
The component B consists of 88 parts by weight of hexamethylene diisocyanate resin and 12 parts by weight of sodium hexametaphosphate.
The solvent is prepared from butyl acetate and propylene glycol methyl ether acetate according to the weight ratio of 1: 0.5.
The defoaming agent is BYK-141.
The dispersant is BYK-110.
The preparation method of the modified carbon nano tube comprises the following steps:
s1, adding 12 parts by weight of single-walled carbon nanotube and 4 parts by weight of oxalic acid into 33.5 parts by weight of absolute ethyl alcohol, uniformly dispersing, adding 0.5 part by weight of stearic acid, heating to 65 ℃, and carrying out ultrasonic treatment at 500W for 30min to obtain a carbon nanotube mixed solution;
s2, adding 8 parts by weight of m-pentadecylphenol, 3 parts by weight of 3, 3, 3-trifluoropropyltrimethoxysilane and 4 parts by weight of tridecafluorooctyltriethoxysilane into a reaction kettle, adding 0.1 part by weight of organic bismuth, and stirring at the rotating speed of 300rpm at 85 ℃ for 6 hours to obtain a modifier;
s3, dropping 3 parts by weight of modifier into 8 parts by weight of carbon nanotube mixed solution, stirring at the rotating speed of 600rpm for 2 hours at the temperature of 70 ℃, filtering and drying to obtain the modified carbon nanotube.
The preparation method of the filler comprises the following steps:
s11, adding 40 parts by weight of silicon dioxide, 30 parts by weight of hollow glass beads and 30 parts by weight of lithopone into a ball mill, and carrying out ball milling for 2 hours at the rotating speed of 800rpm to obtain mixed powder;
s12, adding 20 parts by weight of the mixed powder into 79 parts by weight of lanthanum nitrate solution, adding 1 part by weight of vinyltriethoxysilane, stirring at 90 ℃ at a rotating speed of 500rpm for 50min, performing ultrasonic treatment at 500W for 30min, filtering, and drying to obtain the filler.
The preparation method of the finish paint for the building aluminum veneer curtain wall comprises the following steps:
s21, adding fluorocarbon resin, methyl methacrylate resin, a dispersing agent, a thickening agent, dioctyl phthalate, 3- (trihydroxy silicon base) propyl methyl phosphate, 4-aminobenzene boric acid and a solvent into a reaction kettle, stirring at the rotating speed of 800rpm for 60min, adding a filler, a modified carbon nano tube, silica sol, diethylenetriamine, ethylene glycol butyl ether, a defoaming agent and a pH regulator, and stirring at the rotating speed of 1000rpm for 20min to obtain a component A;
s22, uniformly mixing hexamethylene diisocyanate resin and sodium hexametaphosphate to obtain a component B;
and S23, uniformly stirring the component A and the component B according to the weight ratio to obtain the finishing paint for the building aluminum veneer curtain wall.
Comparative example 1
Comparative example 1 is different from example 1 in that comparative example 1 does not contain the modified carbon nanotube, and the others are the same.
Comparative example 2
Comparative example 2 is different from example 1 in that comparative example 2 uses single-walled carbon nanotubes instead of the modified carbon nanotubes, and the others are the same.
Comparative example 3
Comparative example 3 is different from example 1 in that the modified carbon nanotube as described in comparative example 3 is prepared by the same method as example 1.
In comparative example 3, the modifier was replaced with an aqueous solution of a silane coupling agent.
The preparation method of the modified carbon nano tube comprises the following steps:
s1, adding 10 parts by weight of single-walled carbon nanotube and 2 parts by weight of oxalic acid into 37 parts by weight of absolute ethyl alcohol, uniformly dispersing, adding 1 part by weight of stearic acid, heating to 75 ℃, and carrying out ultrasonic treatment at 500W for 30min to obtain a carbon nanotube mixed solution;
s2, dripping 4 parts by weight of aqueous solution of silane coupling agent KH550 with the mass concentration of 5% into 8 parts by weight of carbon nanotube mixed solution, stirring at the rotating speed of 400rpm at the temperature of 80 ℃ for 3 hours, filtering and drying to obtain the modified carbon nanotubes.
Comparative example 4
Comparative example 4 is different from example 1 in that comparative example 4 employs a filler composed of 50 parts by weight of silica, 30 parts by weight of hollow glass beads, and 20 parts by weight of lithopone in place of the filler described in example 1, and the other is the same.
The preparation method of the filler comprises the following steps:
s11, adding 50 parts by weight of silicon dioxide, 30 parts by weight of hollow glass beads and 20 parts by weight of lithopone into a ball mill, and carrying out ball milling at the rotating speed of 500rpm for 3 hours to obtain the filler.
To further demonstrate the effect of the present invention, the following test methods were provided:
1. and testing the thermal insulation temperature difference according to JC/T235-2008.
2. Wear resistance: abrasion resistance was tested by an abrasion tester (5131, Taber, usa) at room temperature, test conditions: the grinding wheel CS-10 is subjected to 500g of load force, the cycle is performed for 500 times, the abrasion resistance of the coating is represented by testing the mass loss after the cycle, and the smaller the mass loss is, the better the scratch resistance of the coating is.
TABLE 1 test results
Figure 733395DEST_PATH_IMAGE001
As can be seen from Table 1, the finish paint of the invention has good heat insulation and wear resistance.
As can be seen from comparison of examples 1 to 3, the heat insulation and wear resistance can be improved to a certain extent by optimizing the raw material ratio and the preparation parameters of the modified carbon nanotubes and the filler, wherein example 1 is the best mode.
As can be seen from comparison of example 1 and comparative examples 1 to 3, the modified carbon nanotube of the present invention can significantly improve thermal insulation and wear resistance, and the modified carbon nanotubes prepared by different carbon nanotube preparation methods have different improvements in thermal insulation and wear resistance, and the modified carbon nanotube prepared by the modified carbon nanotube preparation method of the present invention can significantly improve thermal insulation and wear resistance compared to the modified carbon nanotubes prepared by other methods.
Comparing example 1 with comparative example 4, it can be seen that the heat insulation and wear resistance of the filler of the present invention can be significantly improved, and the heat insulation and wear resistance can be significantly improved by treating the mixed powder composed of silica, hollow glass beads and lithopone with a rare earth solution and a silane coupling agent.
In light of the foregoing description of preferred embodiments according to the invention, it is clear that many changes and modifications can be made by the person skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.

Claims (8)

1. The building aluminum veneer curtain wall finish paint is characterized by comprising a component A and a component B, wherein the weight ratio of the component A to the component B is 6-10: 1;
the component A is prepared from the following raw materials in parts by weight: 30-50 parts of fluorocarbon resin, 12-20 parts of filler, 3-7 parts of modified carbon nanotube, 4-8 parts of methyl methacrylate resin, 1-3 parts of silica sol, 1.5-2.5 parts of dispersant, 1.2-2 parts of 3- (trihydroxy silicon base) methyl propyl phosphate, 1-1.6 parts of 4-aminobenzene boric acid, 1-1.8 parts of diethylenetriamine, 0.6-1.2 parts of ethylene glycol butyl ether, 0.5-0.9 part of defoamer, 0.3-0.6 part of thickener, 0.2-0.6 part of dioctyl phthalate, 0.05-0.15 part of pH regulator and 12-20 parts of solvent;
the component B consists of 80-95 parts by weight of hexamethylene diisocyanate resin and 5-12 parts by weight of sodium hexametaphosphate;
the preparation method of the modified carbon nano tube comprises the following steps:
s1, adding 4-12 parts by weight of single-walled carbon nanotubes and 1-4 parts by weight of oxalic acid into 20-50 parts by weight of absolute ethyl alcohol, uniformly dispersing, adding 0.5-3 parts by weight of stearic acid, heating to 65-80 ℃, and performing ultrasonic treatment to obtain a carbon nanotube mixed solution;
s2, adding 4-10 parts by weight of m-pentadecylphenol, 2-5 parts by weight of 3, 3, 3-trifluoropropyltrimethoxysilane and 2-5 parts by weight of tridecafluorooctyltriethoxysilane into a reaction kettle, adding 0.05-0.2 part by weight of organic bismuth, and stirring at the rotating speed of 100-400 rpm at the temperature of 80-95 ℃ for 2-8 hours to obtain a modifier;
s3, dripping 2-5 parts by weight of a modifier into 4-10 parts by weight of a carbon nanotube mixed solution, stirring at the rotating speed of 200-600 rpm for 1-4 hours at the temperature of 70-90 ℃, filtering, and drying to obtain a modified carbon nanotube;
the preparation method of the filler comprises the following steps:
s11, adding 40-60 parts by weight of silicon dioxide, 20-50 parts by weight of hollow glass beads and 10-30 parts by weight of lithopone into a ball mill, and performing ball milling for 1-4 hours at the rotating speed of 400-800 rpm to obtain mixed powder;
s12, adding 10-30 parts by weight of mixed powder into 50-90 parts by weight of lanthanum nitrate solution, adding 0.5-3 parts by weight of vinyltriethoxysilane, stirring at a rotating speed of 200-800 rpm for 20-60 min at 80-95 ℃, performing ultrasonic treatment at 200-800W for 20-35 min, filtering, and drying to obtain the filler.
2. The architectural aluminum veneer curtain wall finish paint according to claim 1, wherein the component A is prepared from the following raw materials in parts by weight: 35-50 parts of fluorocarbon resin, 15-20 parts of filler, 4-7 parts of modified carbon nanotube, 4-7 parts of methyl methacrylate resin, 1-2.5 parts of silica sol, 1.5-2.2 parts of dispersant, 1.5-2 parts of 3- (trihydroxy silicon base) methyl propyl phosphate, 1.2-1.6 parts of 4-aminobenzene boric acid, 1-1.5 parts of diethylenetriamine, 0.8-1.2 parts of ethylene glycol butyl ether, 0.6-0.9 part of defoamer, 0.4-0.6 part of thickener, 0.2-0.5 part of dioctyl phthalate, 0.05-0.12 part of pH regulator and 12-16 parts of solvent.
3. The architectural aluminum veneer curtain wall finish paint according to claim 1, wherein the component A is prepared from the following raw materials in parts by weight: 45 parts of fluorocarbon resin, 18 parts of filler, 6 parts of modified carbon nanotube, 5 parts of methyl methacrylate resin, 2 parts of silica sol, 2 parts of dispersant, 1.8 parts of 3- (trihydroxy silicon-based) propyl methyl phosphate, 1.5 parts of 4-aminobenzene boric acid, 1.2 parts of diethylenetriamine, 1 part of ethylene glycol butyl ether, 0.8 part of defoaming agent, 0.5 part of thickener, 0.4 part of dioctyl phthalate, 0.1 part of pH regulator and 14.7 parts of solvent.
4. The architectural aluminum veneer curtain wall finish according to claim 1, wherein the B component consists of 89 parts by weight of hexamethylene diisocyanate resin and 11 parts by weight of sodium hexametaphosphate.
5. The finishing paint for the architectural aluminum veneer curtain wall as claimed in claim 1, wherein the ultrasonic treatment power in S1 is 200-800W, and the ultrasonic treatment time is 20-45 min.
6. The finishing paint for the architectural aluminum veneer curtain wall as claimed in claim 1, wherein the solvent is prepared from butyl acetate and propylene glycol methyl ether acetate according to a weight ratio of 1: 0.2-2.
7. The finishing paint for the architectural aluminum veneer curtain wall as claimed in claim 1, wherein the fluorocarbon resin is polyvinylidene fluoride resin, the thickener is hydroxyethyl cellulose, and the pH regulator is triethanolamine.
8. The preparation method of the finishing paint for the architectural aluminum veneer curtain wall as claimed in any one of claims 1 to 7, which is characterized by comprising the following steps:
s21, adding fluorocarbon resin, methyl methacrylate resin, a dispersing agent, a thickening agent, dioctyl phthalate, 3- (trihydroxy silicon-based) propyl methyl phosphate, 4-aminophenylboronic acid and a solvent into a reaction kettle, stirring at the rotating speed of 400-1000 rpm for 40-80 min, adding a filler, a modified carbon nanotube, silica sol, diethylenetriamine, ethylene glycol monobutyl ether, a defoaming agent and a pH regulator, and stirring at the rotating speed of 800-1500 rpm for 10-30 min to obtain a component A;
s22, uniformly mixing hexamethylene diisocyanate resin and sodium hexametaphosphate to obtain a component B;
and S23, uniformly stirring the component A and the component B according to the weight ratio to obtain the finishing paint for the building aluminum veneer curtain wall.
CN202210039715.2A 2022-01-14 2022-01-14 Building aluminum veneer curtain wall finish paint and preparation method thereof Active CN114045071B (en)

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