CN112194970A - Heat-insulating noise-reducing waste gas-removing vehicle paint and manufacturing method thereof - Google Patents
Heat-insulating noise-reducing waste gas-removing vehicle paint and manufacturing method thereof Download PDFInfo
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- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/08—Treatment with low-molecular-weight non-polymer organic compounds
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/10—Treatment with macromolecular organic compounds
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/12—Treatment with organosilicon compounds
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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- C08K2003/2241—Titanium dioxide
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Abstract
The invention discloses a heat-insulating noise-reducing waste gas-removing vehicle paint and a manufacturing method thereof, the heat-insulating noise-reducing waste gas-removing vehicle paint takes mixed resin prepared from epoxy resin, water-diluted hydroxyl polyacrylate with the hydroxyl group mass concentration of 3%, a water-based aliphatic isocyanate curing agent, a BYK-190 water-based dispersing agent, a BYK-345 organic silicon surfactant and a BYK028 organic silicon defoaming agent as a matrix, hollow glass beads are grafted and coated with titanium dioxide through sodium carboxymethylcellulose, and surface grafting fluorine-containing resin modified hollow glass beads-titanium dioxide composite particles prepared through double modification of fluorocarbon resin with hydroxyl functional groups and hexamethylene diisocyanate are taken as functional fillers, and a functional coating with the thickness of 0.5-0.8 mu m is formed after the finally-prepared composite material is cured. The invention has good binding force with the vehicle body, abrasion resistance, weather resistance, waste gas degradation function and heat insulation function.
Description
Technical Field
The invention relates to the technical field of vehicle materials, in particular to a heat-insulating noise-reducing waste gas-removing vehicle paint and a manufacturing method thereof.
Background
In the prior art, the working environments of domestic vehicles, railway locomotives, large railway engineering vehicles and other vehicles are exposed for a long time, and particularly, the outer surface coating of the vehicle is greatly influenced by weather and environment, so that strict requirements are imposed on the surface coating of the vehicle. Nowadays, most of domestic vehicles, railway locomotives, large railway engineering vehicles and other vehicles adopt alkyd resin paint, and the paint has the advantages of mature technology, stable quality, simple construction and the like, but has the defects of long drying time, low hardness, poor adhesive force and weather resistance and the like.
Kunming machinery factory, a general company of China railway construction, is an enterprise for producing large railway engineering vehicles such as tamping cars, stabilizing cars, cleaning cars and the like, and the factory adopts acrylic polyurethane finish paint and matched epoxy primer paint produced by the institute of electric locomotives, Taoism era, a institute of railways, to obtain good coating effect, but has single function, poor wear resistance and poor heat resistance.
Therefore, the heat-insulating noise-reducing waste gas-removing vehicle paint which has good bonding force with a vehicle body, is wear-resistant and weather-resistant, has the function of degrading waste gas and has the function of heat insulation is urgently needed in the market.
Disclosure of Invention
The invention aims to provide the heat-insulating noise-reducing waste gas-removing vehicle paint which has good bonding force with a vehicle body, is wear-resistant and weather-resistant, has the function of degrading waste gas and has the function of heat insulation.
In order to achieve the purpose, the invention adopts the following technical scheme: a heat-insulating noise-reducing waste gas-removing vehicle paint takes mixed resin prepared from epoxy resin, water-diluted hydroxyl polyacrylate with the hydroxyl group mass concentration of 3%, a water-based aliphatic isocyanate curing agent, a BYK-190 water-based dispersing agent, a BYK-345 organic silicon surfactant and a BYK028 organic silicon defoaming agent as a matrix, hollow glass beads are grafted and coated with titanium dioxide through sodium carboxymethylcellulose, and surface-grafted fluorine-containing resin modified hollow glass beads-titanium dioxide composite particles prepared through double modification of fluorocarbon resin with hydroxyl functional groups and hexamethylene diisocyanate are taken as functional fillers, and a functional coating with the thickness of 50-70 mu m is formed after the finally-mixed composite material is cured;
the manufacturing method of the heat-insulating, noise-reducing and exhaust-gas-removing vehicle paint comprises the following stages:
s1: raw material preparation
Preparing a main material: 12-15 parts of epoxy resin, 45-50 parts of water-diluted hydroxyl polyacrylate with hydroxyl content of 3% by mass, 5-8 parts of fluorocarbon resin with hydroxyl functional groups, 5-8 parts of hexamethylene diisocyanate, 5-8 parts of waterborne aliphatic isocyanate curing agent, 0.5-0.8 part of BYK-190 waterborne dispersant, 0.5-0.8 part of BYK-345 organic silicon surface active agent, 0.5-0.8 part of BYK028 organic silicon defoamer, 10-12 parts of hollow glass microspheres and 8-10 parts of titanium pigment;
preparing auxiliary materials: preparing a mixed solvent formed by mixing sufficient sodium carboxymethylcellulose, deionized water, 20% sodium hydroxide solution by mass concentration, ethanol, gamma-aminopropyltriethoxysilane and xylene/ethyl acetate/butyl acetate according to the mass ratio of 6: 7;
s2: preparation of hollow glass bead-titanium dioxide composite particles
Immersing the hollow glass beads prepared in the step (I) of the step (S1) into a sodium hydroxide solution prepared in the step (S1) of the step (S1), and soaking for 6-7 hours to obtain surface-treated hollow glass beads;
uniformly and ultrasonically dispersing the titanium dioxide prepared in the step S1 into a mixed solution of the dispersing agent and the carrier by taking 850 parts to 1000 parts by weight of deionized water as the carrier by taking the sodium carboxymethylcellulose prepared in the step S1 as a dispersing agent to obtain an ultrasonic dispersion liquid, and then immersing the surface-treated hollow glass beads obtained in the step I into a negative carrier liquid by taking the ultrasonic dispersion liquid as a load liquid for pre-loading for 2h to 3h to obtain loaded hollow glass beads;
thirdly, the loaded hollow glass bead obtained in the second step is placed in an environment of 480-500 ℃ to be baked completely and dried, and hollow glass bead-titanium dioxide composite particles are obtained;
s3: preparation of functional powder
Diluting the sodium hydroxide solution prepared in the step S1 with deionized water into 0.3mol/L sodium hydroxide solution, adding 300-320 parts by weight of 0.3mol/L sodium hydroxide solution into a container with magnetic stirring, infiltrating the hollow glass bead-titanium dioxide composite particles obtained in the step S2, heating to 70-75 ℃, stirring at a stirring speed of 80-100 rpm for 2-2.5 h, performing suction filtration, and leaching with deionized water to neutrality to obtain OH-hollow glass bead-titanium dioxide composite particles;
mixing the OH-hollow glass bead-titanium dioxide composite particles obtained in the step I with 95-100 parts by weight of ethanol and 12-15 parts by weight of deionized water, and then carrying out ultrasonic dispersion for 15-18 min to obtain an OH-hollow glass bead-titanium dioxide composite particle dispersion liquid;
thirdly, 0.1 to 0.12 portion of gamma-aminopropyl triethoxysilane is dripped into the OH-hollow glass bead-titanium dioxide composite particle dispersion liquid according to the weight portion, the temperature is raised to 70 to 75 ℃, the mixture is stirred for 2 to 2.5 hours at the stirring speed of 80 to 100rpm, the mixture is filtered and leached for 3 to 5 times by ethanol, the unreacted gamma-aminopropyl triethoxysilane is removed, the mixture is heated to 75 to 80 ℃ in a vacuum environment, dried for 8 to 10 hours and then sieved, and NH is obtained2-hollow glass microspheres-titanium dioxide composite particles;
fourthly, NH obtained in the third step2Adding the hollow glass bead-titanium dioxide composite particles into 42 to 45 parts by weight of the mixed solvent prepared in the step S1, and performing ultrasonic dispersion for 15 to 18 minutes to obtain NH2-a hollow glass bead-titanium dioxide composite particle dispersion;
fifthly, adding NH2Gradually adding a proper amount of hexamethylene diisocyanate trimer and 22-25 parts by weight of the mixed solvent prepared in the step S1 into the hollow glass bead-titanium dioxide composite particle dispersion liquid, and stirring at the normal temperature at the stirring speed of 80-100 rpm for 3-3.5 hours to obtain HDI-hollow glass bead-titanium dioxide composite particle dispersion liquid;
gradually adding HDI-hollow glass bead-titanium dioxide composite particle dispersion liquid into the fluorocarbon resin containing hydroxyl functional groups prepared in the step S1 and 22-25 parts by weight of the mixed solvent prepared in the step S1 at the normal temperature at the stirring speed of 80-100 rpm for 8-10 h, filtering after the reaction is finished, leaching the mixed solvent prepared in the step S1 for 3-5 times to remove unreacted fluorocarbon resin, heating to 145-150 ℃, drying for 8-10 h, and sieving to obtain F-hollow glass bead-titanium dioxide composite particles;
s4: shaping of paints
Taking a mixed resin mixture prepared in the step S1, namely epoxy resin, water-diluted hydroxyl polyacrylate with the hydroxyl group mass concentration of 3%, a water-based aliphatic isocyanate curing agent, a BYK-190 water-based dispersing agent, a BYK-345 silicone surfactant and a BYK028 silicone defoaming agent as a matrix, adding the F-hollow glass bead-titanium dioxide composite particles obtained in the step S3 into the matrix, and uniformly stirring to obtain a coating raw material;
secondly, during construction, firstly, carrying out oil and rust removal treatment on the surface of the vehicle body, then carrying out phosphating treatment, and then spraying a first primer by taking the coating raw material obtained in the step one as a raw material; when spraying the primer, controlling the paint proportion by deionized water, adjusting the construction viscosity of the paint to 22S-28S according to the standard of coating a #4 cup at 25 ℃, filtering by a 100-mesh copper net, spraying, and controlling the thickness of the coating to be 50-70 mu m after curing and drying;
thirdly, baking the coating solidified after spraying at 145-150 ℃ for 20-25 min to finish stabilization treatment, thus obtaining the required heat-insulating noise-reducing waste gas-removing vehicle paint.
Compared with the prior art, the invention has the following advantages: (1) the invention uses the combined matrix matched with the acrylic polyurethane finish paint and the epoxy primer paint, and is matched with the activation modification of the vehicle body, so that the vehicle paint matching system has convenient construction, normal-temperature drying, strong adhesive force, good impact resistance and weather resistance, the problems of the prior vehicle surface paint layer such as falling off, color change, light loss, pulverization and the like are fundamentally solved, the appearance decoration of the engineering vehicle is greatly improved, the appearance quality of the vehicle is stepped, and good economic benefit and social benefit are obtained. (2) The surface grafting fluorine-containing resin can obviously improve the dispersibility and compatibility of HGB in PU, so that the heat insulation performance of the F-HGB/PU coating is superior to that of the HGB/PU coating, and the heat insulation performance of the coating is enhanced along with the increase of the grain diameter and the addition amount of the HGB. Furthermore, the LOI of the coating increases with the content and particle size of the glass beads and the LOI of the fluorine-containing resin is higher, so that the F-HGB/PU coatingThe flame retardant properties of the layer are slightly higher than those of the HGB/PU coating. (3) The actual functional layer of the surface layer is the hollow glass bead-titanium dioxide composite particles, the heat conductivity coefficient of the surface layer is only 0.25W/(m.K) -0.3W/(m.K) according to the proportion of the invention, and the surface layer can act on CO, CH compounds and NO under sufficient sunshine in fine days (except the surface layer is illuminated, the light energy reflected from the intermediate matrix is also reflected, and the photocatalyst effect is enhanced)XThe comprehensive degradation rate of the composite material is 58-63%, and if the composite material is popularized in the field of automobiles, the composite material can obviously reduce the concentration of waste gas in air in cities, improve the living environment and have good ecological benefit. Therefore, the invention has the characteristics of good bonding force with the vehicle body, abrasion resistance, weather resistance, waste gas degradation and heat insulation.
Detailed Description
Example 1:
a heat-insulating noise-reducing waste gas-removing vehicle paint takes mixed resin prepared from epoxy resin, water-diluted hydroxyl polyacrylate with the hydroxyl group mass concentration of 3%, a water-based aliphatic isocyanate curing agent, a BYK-190 water-based dispersing agent, a BYK-345 organic silicon surfactant and a BYK028 organic silicon defoaming agent as a matrix, hollow glass beads are grafted and coated with titanium dioxide through sodium carboxymethylcellulose, and surface-grafted fluorine-containing resin modified hollow glass beads-titanium dioxide composite particles prepared through double modification of fluorocarbon resin with hydroxyl functional groups and hexamethylene diisocyanate are taken as functional fillers, and a functional coating with the thickness of 50-70 mu m is formed after the finally-mixed composite material is cured;
the manufacturing method of the heat-insulating, noise-reducing and exhaust-gas-removing vehicle paint comprises the following stages:
s1: raw material preparation
Preparing a main material: 13.2kg of epoxy resin, 48.4kg of water-diluted hydroxyl polyacrylate with hydroxyl content of 3 percent by mass, 6.3kg of fluorocarbon resin with hydroxyl functional groups, 7.2kg of hexamethylene diisocyanate, 6.7kg of waterborne aliphatic isocyanate curing agent, 0.7kg of BYK-190 waterborne dispersant, 0.7kg of BYK-345 organosilicon surfactant, 0.6kg of BYK028 organosilicon defoamer, 11.2kg of hollow glass beads and 9.6kg of titanium pigment;
preparing auxiliary materials: preparing a mixed solvent formed by mixing sufficient sodium carboxymethylcellulose, deionized water, 20% sodium hydroxide solution by mass concentration, ethanol, gamma-aminopropyltriethoxysilane and xylene/ethyl acetate/butyl acetate according to the mass ratio of 6: 7;
s2: preparation of hollow glass bead-titanium dioxide composite particles
Immersing the hollow glass beads prepared in the step (I) of the step (S1) into a sodium hydroxide solution prepared in the step (S1) of the step (S1), and soaking for 6-7 hours to obtain surface-treated hollow glass beads;
uniformly and ultrasonically dispersing the titanium dioxide prepared in the step S1 into a mixed solution of the dispersing agent and the carrier by taking the sodium carboxymethylcellulose prepared in the step S1 as a dispersing agent and 850kg-1000kg of deionized water in parts by weight as a carrier to obtain an ultrasonic dispersion liquid, and then immersing the surface-treated hollow glass beads obtained in the step I into a negative carrier liquid by taking the ultrasonic dispersion liquid as a load liquid for pre-loading for 2h-3h to obtain loaded hollow glass beads;
thirdly, the loaded hollow glass bead obtained in the second step is placed in an environment of 480-500 ℃ to be baked completely and dried, and hollow glass bead-titanium dioxide composite particles are obtained;
s3: preparation of functional powder
Diluting the sodium hydroxide solution prepared in the step S1 with deionized water into 0.3mol/L sodium hydroxide solution, adding 300kg-320kg of 0.3mol/L sodium hydroxide solution into a container with magnetic stirring, infiltrating the hollow glass bead-titanium dioxide composite particles obtained in the step S2, heating to 70-75 ℃, stirring at the stirring speed of 80-100 rpm for 2-2.5 h, performing suction filtration, and leaching with deionized water to neutrality to obtain OH-hollow glass bead-titanium dioxide composite particles;
mixing the OH-hollow glass bead-titanium dioxide composite particles obtained in the step I with 95kg-100kg of ethanol and 12kg-15kg of deionized water, and then carrying out ultrasonic dispersion for 15min-18min to obtain OH-hollow glass bead-titanium dioxide composite particle dispersion liquid;
thirdly, dripping the OH-hollow glass bead-titanium dioxide composite particle dispersion liquid according to the weight portionHeating gamma-aminopropyl triethoxysilane accounting for 0.1-0.12 kg to 70-75 deg.C, stirring at 80-100 rpm for 2-2.5 h, filtering, eluting with ethanol for 3-5 times, removing unreacted gamma-aminopropyl triethoxysilane, heating to 75-80 deg.C under vacuum, drying for 8-10 h, and sieving to obtain NH2-hollow glass microspheres-titanium dioxide composite particles;
fourthly, NH obtained in the third step2Adding hollow glass bead-titanium dioxide composite particles into 42kg-45kg of the mixed solvent prepared in the step S1, and performing ultrasonic dispersion for 15min-18min to obtain NH2-a hollow glass bead-titanium dioxide composite particle dispersion;
fifthly, adding NH2Gradually adding a proper amount of hexamethylene diisocyanate trimer and 22kg-25kg of the mixed solvent prepared in the step S1 into the hollow glass bead-titanium dioxide composite particle dispersion liquid, and stirring at the normal temperature at the stirring speed of 80rpm-100rpm for 3h-3.5h to obtain HDI-hollow glass bead-titanium dioxide composite particle dispersion liquid;
gradually adding HDI-hollow glass bead-titanium dioxide composite particle dispersion liquid into the fluorocarbon resin containing hydroxyl functional groups prepared in the step S1 and 22kg-25kg of mixed solvent prepared in the step S1 at the normal temperature at the stirring speed of 80rpm-100rpm for 8h-10h, filtering after the reaction is finished, leaching the mixed solvent prepared in the step S1 for 3 times-5 times to remove unreacted fluorocarbon resin, heating to 145 ℃ -150 ℃, drying for 8h-10h, and sieving to obtain F-hollow glass bead-titanium dioxide composite particles;
s4: shaping of paints
Taking a mixed resin mixture prepared in the step S1, namely epoxy resin, water-diluted hydroxyl polyacrylate with the hydroxyl group mass concentration of 3%, a water-based aliphatic isocyanate curing agent, a BYK-190 water-based dispersing agent, a BYK-345 silicone surfactant and a BYK028 silicone defoaming agent as a matrix, adding the F-hollow glass bead-titanium dioxide composite particles obtained in the step S3 into the matrix, and uniformly stirring to obtain a coating raw material;
secondly, during construction, firstly, carrying out oil and rust removal treatment on the surface of the vehicle body, then carrying out phosphating treatment, and then spraying a first primer by taking the coating raw material obtained in the step one as a raw material; when spraying the primer, controlling the paint proportion by deionized water, adjusting the construction viscosity of the paint to 22S-28S according to the standard of coating a #4 cup at 25 ℃, filtering by a 100-mesh copper net, spraying, and controlling the thickness of the coating to be 50-70 mu m after curing and drying;
thirdly, baking the coating solidified after spraying at 145-150 ℃ for 20-25 min to finish stabilization treatment, thus obtaining the required heat-insulating noise-reducing waste gas-removing vehicle paint.
The thermal insulation and noise reduction vehicle paint except exhaust gas produced according to the embodiment has the overall thermal conductivity of only 0.48W/(m.K) -0.59W/(m.K), can reduce the noise by 10-15 dB, and has the advantages that the surface layer can reduce the noise by CO, CH compounds and NO under the sufficient sunlight of fine days (besides the light received by the surface layer, the light energy reflected from the intermediate substrate also enhances the photocatalyst effect)XThe comprehensive degradation rate of the composite is 64 to 70 percent.
Example 2
The whole is in accordance with example 1, with the difference that:
s1: raw material preparation
Preparing a main material: 12kg of epoxy resin, 45kg of water-diluted hydroxyl polyacrylate with hydroxyl content of 3%, 8kg of fluorocarbon resin with hydroxyl functional groups, 8kg of hexamethylene diisocyanate, 8kg of waterborne aliphatic isocyanate curing agent, 0.8kg of BYK-190 waterborne dispersant, 0.8kg of BYK-345 organosilicon surfactant, 0.8kg of BYK028 organosilicon defoamer, 12kg of hollow glass beads and 10kg of titanium pigment;
example 3
The whole is in accordance with example 1, with the difference that:
s1: raw material preparation
Preparing a main material: 15kg of epoxy resin, 50kg of water-diluted hydroxyl polyacrylate with hydroxyl content of 3%, 5kg of fluorocarbon resin with hydroxyl functional groups, 5kg of hexamethylene diisocyanate, 5kg of waterborne aliphatic isocyanate curing agent, 0.5kg of BYK-190 waterborne dispersant, 0.5kg of BYK-345 organosilicon surfactant, 0.5kg of BYK028 organosilicon defoamer, 10kg of hollow glass beads and 8kg of titanium pigment;
the previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (1)
1. The utility model provides a thermal-insulated noise reduction removes waste gas car lacquer which characterized in that: the heat-insulating noise-reducing waste gas-removing vehicle paint takes mixed resin prepared from epoxy resin, water-diluted hydroxyl polyacrylate with the hydroxyl group mass concentration of 3%, a water-based aliphatic isocyanate curing agent, a BYK-190 water-based dispersing agent, a BYK-345 organic silicon surfactant and a BYK028 organic silicon defoaming agent as a matrix, takes hollow glass beads grafted and coated with titanium dioxide through sodium carboxymethylcellulose, takes surface-grafted fluorine-containing resin modified hollow glass beads-titanium dioxide composite particles prepared through double modification of fluorocarbon resin with hydroxyl functional groups and hexamethylene diisocyanate as functional fillers, and finally forms a functional coating with the thickness of 50-70 mu m after the composite material prepared by mixing is cured;
the manufacturing method of the heat-insulating, noise-reducing and exhaust-gas-removing vehicle paint comprises the following stages:
s1: raw material preparation
Preparing a main material: 12-15 parts of epoxy resin, 45-50 parts of water-diluted hydroxyl polyacrylate with hydroxyl content of 3% by mass, 5-8 parts of fluorocarbon resin with hydroxyl functional groups, 5-8 parts of hexamethylene diisocyanate, 5-8 parts of waterborne aliphatic isocyanate curing agent, 0.5-0.8 part of BYK-190 waterborne dispersant, 0.5-0.8 part of BYK-345 organic silicon surface active agent, 0.5-0.8 part of BYK028 organic silicon defoamer, 10-12 parts of hollow glass microspheres and 8-10 parts of titanium pigment;
preparing auxiliary materials: preparing a mixed solvent formed by mixing sufficient sodium carboxymethylcellulose, deionized water, 20% sodium hydroxide solution by mass concentration, ethanol, gamma-aminopropyltriethoxysilane and xylene/ethyl acetate/butyl acetate according to the mass ratio of 6: 7;
s2: preparation of hollow glass bead-titanium dioxide composite particles
Immersing the hollow glass beads prepared in the step (I) of the step (S1) into a sodium hydroxide solution prepared in the step (S1) of the step (S1), and soaking for 6-7 hours to obtain surface-treated hollow glass beads;
uniformly and ultrasonically dispersing the titanium dioxide prepared in the step S1 into a mixed solution of the dispersing agent and the carrier by taking 850 parts to 1000 parts by weight of deionized water as the carrier by taking the sodium carboxymethylcellulose prepared in the step S1 as a dispersing agent to obtain an ultrasonic dispersion liquid, and then immersing the surface-treated hollow glass beads obtained in the step I into a negative carrier liquid by taking the ultrasonic dispersion liquid as a load liquid for pre-loading for 2h to 3h to obtain loaded hollow glass beads;
thirdly, the loaded hollow glass bead obtained in the second step is placed in an environment of 480-500 ℃ to be baked completely and dried, and hollow glass bead-titanium dioxide composite particles are obtained;
s3: preparation of functional powder
Diluting the sodium hydroxide solution prepared in the step S1 with deionized water into 0.3mol/L sodium hydroxide solution, adding 300-320 parts by weight of 0.3mol/L sodium hydroxide solution into a container with magnetic stirring, infiltrating the hollow glass bead-titanium dioxide composite particles obtained in the step S2, heating to 70-75 ℃, stirring at a stirring speed of 80-100 rpm for 2-2.5 h, performing suction filtration, and leaching with deionized water to neutrality to obtain OH-hollow glass bead-titanium dioxide composite particles;
mixing the OH-hollow glass bead-titanium dioxide composite particles obtained in the step I with 95-100 parts by weight of ethanol and 12-15 parts by weight of deionized water, and then carrying out ultrasonic dispersion for 15-18 min to obtain an OH-hollow glass bead-titanium dioxide composite particle dispersion liquid;
③ dripping 0.1 to 0.12 portion of Gamma-aminopropyl triethoxysilane by weight into OH-hollow glass bead-titanium dioxide composite particle dispersion liquid, heating to 70 to 75 ℃, stirring for 2 to 2.5 hours at the stirring speed of 80 to 100rpm, filtering and mixingLeaching with ethanol for 3-5 times to remove unreacted gamma-aminopropyltriethoxysilane, heating to 75-80 deg.C under vacuum, drying for 8-10 hr, and sieving to obtain NH2-hollow glass microspheres-titanium dioxide composite particles;
fourthly, NH obtained in the third step2Adding the hollow glass bead-titanium dioxide composite particles into 42 to 45 parts by weight of the mixed solvent prepared in the step S1, and performing ultrasonic dispersion for 15 to 18 minutes to obtain NH2-a hollow glass bead-titanium dioxide composite particle dispersion;
fifthly, adding NH2Gradually adding a proper amount of hexamethylene diisocyanate trimer and 22-25 parts by weight of the mixed solvent prepared in the step S1 into the hollow glass bead-titanium dioxide composite particle dispersion liquid, and stirring at the normal temperature at the stirring speed of 80-100 rpm for 3-3.5 hours to obtain HDI-hollow glass bead-titanium dioxide composite particle dispersion liquid;
gradually adding HDI-hollow glass bead-titanium dioxide composite particle dispersion liquid into the fluorocarbon resin containing hydroxyl functional groups prepared in the step S1 and 22-25 parts by weight of the mixed solvent prepared in the step S1 at the normal temperature at the stirring speed of 80-100 rpm for 8-10 h, filtering after the reaction is finished, leaching the mixed solvent prepared in the step S1 for 3-5 times to remove unreacted fluorocarbon resin, heating to 145-150 ℃, drying for 8-10 h, and sieving to obtain F-hollow glass bead-titanium dioxide composite particles;
s4: shaping of paints
Taking a mixed resin mixture prepared in the step S1, namely epoxy resin, water-diluted hydroxyl polyacrylate with the hydroxyl group mass concentration of 3%, a water-based aliphatic isocyanate curing agent, a BYK-190 water-based dispersing agent, a BYK-345 silicone surfactant and a BYK028 silicone defoaming agent as a matrix, adding the F-hollow glass bead-titanium dioxide composite particles obtained in the step S3 into the matrix, and uniformly stirring to obtain a coating raw material;
secondly, during construction, firstly, carrying out oil and rust removal treatment on the surface of the vehicle body, then carrying out phosphating treatment, and then spraying a first primer by taking the coating raw material obtained in the step one as a raw material; when spraying the primer, controlling the paint proportion by deionized water, adjusting the construction viscosity of the paint to 22S-28S according to the standard of coating a #4 cup at 25 ℃, filtering by a 100-mesh copper net, spraying, and controlling the thickness of the coating to be 50-70 mu m after curing and drying;
thirdly, baking the coating solidified after spraying at 145-150 ℃ for 20-25 min to finish stabilization treatment, thus obtaining the required heat-insulating noise-reducing waste gas-removing vehicle paint.
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