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CN110054917B - Inorganic heat-insulating coating composition and inorganic heat-insulating coating - Google Patents

Inorganic heat-insulating coating composition and inorganic heat-insulating coating Download PDF

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CN110054917B
CN110054917B CN201910385503.8A CN201910385503A CN110054917B CN 110054917 B CN110054917 B CN 110054917B CN 201910385503 A CN201910385503 A CN 201910385503A CN 110054917 B CN110054917 B CN 110054917B
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inorganic
insulating coating
agent
heat
coating composition
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CN110054917A (en
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陈昌东
任保平
丁赛赛
陈曦
靳晓增
辛锋
任保星
宗翠丽
辛慧
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Shenzhen Vano Technology Co ltd
Pingdingshan University
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Shenzhen Vano Technology Co ltd
Pingdingshan University
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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
    • C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
    • 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
    • C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
    • C09D1/02—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates
    • 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
    • C09D5/004—Reflecting paints; Signal 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
    • 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
    • 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
    • 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
    • C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres

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  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention relates to an inorganic heat-insulating coating composition and an inorganic heat-insulating coating, and belongs to the technical field of inorganic coatings. The inorganic heat-insulating coating composition mainly comprises an inorganic binder and an inorganic filler; the inorganic filler comprises microbeads and tetrapod-like zinc oxide whiskers. The inorganic heat-insulating coating composition takes the microspheres with low heat conductivity coefficient as a heat-insulating main material, the temperature resistance and the deformation resistance of the inorganic heat-insulating coating are improved by utilizing the tetrapod-shaped zinc oxide whiskers with high elastic modulus, and the inorganic binder and the inorganic filler have the same high-temperature resistance and chemical corrosion resistance.

Description

Inorganic heat-insulating coating composition and inorganic heat-insulating coating
Technical Field
The invention relates to an inorganic heat-insulating coating composition and an inorganic heat-insulating coating, and belongs to the technical field of inorganic coatings.
Background
The energy-saving environment-friendly energy. The trend is mainly reflected in the development and application of inorganic heat-insulating coatings in the aspect of coatings, and as most of inorganic materials come from the nature, the inorganic heat-insulating coatings have the characteristics of nature and environmental protection, and the heat insulation can save a large amount of energy consumption, the inorganic heat-insulating coatings can not only save energy sources, but also can not generate harmful components under any use conditions, so that the inorganic heat-insulating coatings become good choices of energy-saving, green, environment-friendly and pollution-free coating products.
While the inorganic heat-insulating coating exerts the advantages thereof, the inorganic heat-insulating coating also has some defects and disadvantages, such as great brittleness, which greatly limits the application of the inorganic heat-insulating coating. Aiming at the defect of high brittleness of the inorganic heat-insulating coating, the Chinese patent application with the application publication number of CN103496917A in the prior art discloses an ecological functional inorganic coating for inner and outer walls, which comprises the following components in percentage by weight: 55-65 parts of white portland cement, 25-35 parts of calcium sulfate whisker, 3.5-4.5 parts of silica fume, 1.5-2.5 parts of rubber powder, 2.5-3.5 parts of calcium hydroxide, 0.03-0.08 part of nano titanium dioxide, 0.1-0.5 part of water-retaining agent and vitrified micro-beads, wherein the mass ratio of the volume of the vitrified micro-beads to the powder is 1-2 mL: 1 g. The inorganic coating has the advantages of heat preservation, weather resistance, antibiosis, crack prevention, environmental protection, no toxicity and the like, but the adopted calcium sulfate whisker has only one-dimensional structure and weak crack resistance, so that the inorganic coating is difficult to meet the actual engineering requirement.
Disclosure of Invention
The invention aims to provide an inorganic heat-insulating coating composition which can greatly improve the cracking resistance of an inorganic heat-insulating coating.
The invention also provides an inorganic heat-insulating coating with good cracking resistance.
In order to achieve the above purpose, the technical scheme adopted by the inorganic heat-insulating coating composition is as follows:
an inorganic heat-insulating coating composition mainly comprises an inorganic binder and an inorganic filler; the inorganic filler comprises microbeads and tetrapod-like zinc oxide whiskers.
The inorganic heat-insulating coating composition takes the microspheres with low heat conductivity coefficient as a heat-insulating main material, the temperature resistance and the deformation resistance of the inorganic heat-insulating coating are improved by utilizing the tetrapod-shaped zinc oxide whiskers with high elastic modulus, and the inorganic binder and the inorganic filler have the same high-temperature resistance and chemical corrosion resistance.
In order to further improve the heat preservation and anti-cracking performance of the inorganic heat preservation coating, preferably, the mass ratio of the inorganic binder, the microspheres and the tetrapod-like zinc oxide whiskers is 25-50: 15-35: 5-15.
Preferably, the beads include ceramic beads and glass beads; the mass ratio of the ceramic beads to the glass beads is 10-20: 5-15. The ceramic beads and the glass beads are two common beads, and are light non-metal multifunctional materials with regular shapes, so that the ceramic beads and the glass beads have good fluidity, the viscosity and the internal stress can be reduced, and the leveling property of the coating is improved; and the distance between the micro-bead spheres can be reduced, the stacking density can be increased, the stability of the coating can be effectively improved, and when the micro-bead spheres and the coating are used as modified addition materials, the coating has the excellent performances of strong wear resistance, high compressive strength and low heat conductivity coefficient. Meanwhile, the two microbeads are adopted and controlled in the proportion, so that the heat-insulating coating has more excellent dispersibility, fluidity, stability and heat-insulating property.
In order to further improve the heat insulating property of the coating, it is preferable that at least a part of the microbeads have a hollow structure. The microbeads with the hollow structures can form a plurality of layers of cavities which are arranged compactly and are independent mutually in a coating layer, so that heat radiation can not be conducted along a straight line, and the heat radiation can be greatly reduced after being weakened layer by layer; because the spherical heat-insulating coating is spherical, the surface area is large, and the heat conduction coefficient of the material is very low, so that more heat radiation can be reflected, and the heat-insulating property of the heat-insulating coating is greatly improved.
The coating is easy to coarsen due to too large particle size of the microbeads, and the heat insulation effect is difficult to achieve due to too small particle size of the microbeads, preferably, the average particle size of the microbeads is 30-120 mu m. Particularly, for the micro-beads with hollow structures, the hollow structures in the micro-beads can play a role in heat insulation and reflection, the micro-beads with large particle sizes have large hollow volumes and better heat insulation and reflection effects, but the micro-beads with large particle sizes increase the roughness of the coating, so that the average particle sizes of the micro-beads are controlled to be 30-120 mu m, and the heat insulation performance of the coating can be further improved.
Preferably, the inorganic filler further comprises calcium sulfate whiskers; the mass ratio of the inorganic binder to the microspheres to the tetrapod-like zinc oxide whiskers to the calcium sulfate whiskers is 25-50: 15-35: 5-10: 1-5. The calcium sulfate whisker is added into the inorganic heat-insulating coating composition, so that the resilience of the inorganic heat-insulating coating can be improved to a great extent by utilizing the high modulus and the high toughness of the calcium sulfate whisker and the high elastic modulus of the tetrapod-like zinc oxide whisker, the temperature change resistance of the inorganic heat-insulating coating is better, and the anti-settling property of the inorganic heat-insulating coating is enhanced by the high thixotropy of the calcium sulfate whisker.
Preferably, the inorganic filler further comprises a powder filler; the powder filler is selected from at least one of diatomite and perlite; the mass ratio of the inorganic binder to the microspheres to the tetrapod-like zinc oxide whiskers to the powder filler is 25-50: 15-35: 5-10: 1-10. The powder fillers diatomite and perlite are used as auxiliary heat insulation materials and have low heat conductivity coefficients, and the diatomite and the perlite have different microstructures, so that the heat radiation and conduction between the heat insulation main materials can be reduced by filling gaps between layers of the microbeads or increasing the intervals between the microbeads, and the heat insulation performance of the coating is improved. Therefore, the powder filler as an auxiliary heat-insulating material can act synergistically with the micro-beads, so that the inorganic heat-insulating coating shows more excellent heat-insulating performance. The calcium sulfate whisker belongs to a sub-nanometer material, has excellent characteristics of the nanometer material, and can obviously enhance the heat insulation performance of the inorganic heat insulation coating when being used together with other inorganic fillers, so that the synergistic interaction effect is better when the calcium sulfate whisker is contained in the inorganic heat insulation coating composition. Preferably, the diatomite has an average particle size of 30 to 36 μm. The average particle size of the perlite is 0.15-0.22 mm.
In order to make various performances of the inorganic heat-insulating coating more remarkable, preferably, the inorganic heat-insulating coating composition further comprises an auxiliary agent; the mass ratio of the auxiliary agent to the inorganic binder is not more than 1: 5.
The technical scheme adopted by the inorganic heat-insulating coating is as follows:
an inorganic heat-insulating coating is composed of a solvent and the inorganic heat-insulating coating composition.
The inorganic heat-insulating coating has good heat-insulating property and temperature change resistance, is high-temperature resistant, chemical corrosion resistant, green, environment-friendly and pollution-free, and has wide raw material sources, low price and convenient use.
In order to ensure the adhesion performance of the inorganic heat-insulating coating, the viscosity of the inorganic heat-insulating coating is preferably 70-120 KU.
Detailed Description
The inorganic heat-insulating coating composition provided by the invention mainly comprises an inorganic binder and an inorganic filler; the inorganic filler comprises microbeads and tetrapod-like zinc oxide whiskers. The tetrapod-like zinc oxide whiskers in the inorganic filler adopted by the invention have a unique three-dimensional tetrapod-like three-dimensional structure, the diameter of a central body of the whiskers is 0.8-1.2 mu m, the length of a needle-like body is 50-200 mu m, the diameter of the root of the needle-like body is 0.5-10 mu m, and the length of the needle-like body is preferably 80-200 mu m. The tetrapod-like zinc oxide whiskers can be uniformly distributed in the matrix, so that the inorganic heat-insulating coating can effectively resist cracking caused by thermal shrinkage and thermal deformation. The tetrapod-like zinc oxide whisker can be prepared by a gas phase method, a liquid phase method, a microwave heating method or an ion exchange resin method. Preferably, the mass ratio of the inorganic binder to the microspheres to the tetrapod-like zinc oxide whiskers is 25-50: 15-35: 7-10.
Further preferably, the mass ratio of the inorganic binder to the microspheres to the tetrapod-like zinc oxide whiskers is 30-50: 15-35: 5-10.
Further preferably, the mass ratio of the inorganic binder to the microspheres to the tetrapod-like zinc oxide whiskers is 30-50: 23-35: 5-10.
Preferably, the inorganic binder is at least one selected from the group consisting of a silicate-based binder, a phosphate-based binder, a borate-based binder, and a sulfate-based binder.
Preferably, the silicate binder is at least one selected from the group consisting of lithium silicate, sodium silicate, potassium silicate, and silica sol. Preferably, the beads are selected from at least one of glass beads and ceramic beads. Preferably, the beads include ceramic beads and glass beads. The mass ratio of the ceramic beads to the glass beads is 10-20: 5-15. Further preferably, the mass ratio of the ceramic beads to the glass beads is 15-20: 8-15.
Preferably, at least a part of the microbeads have a hollow structure. In order to further improve the heat insulating performance of the inorganic heat insulating coating, it is preferable that the interior of the hollow structure of the microbeads having the hollow structure at least partially is in a negative pressure state.
Preferably, the microbeads each have a hollow structure. All the microbeads have hollow structures, so that multiple layers of cavities which are arranged compactly, uniformly and mutually independently can be formed in the coating, and the heat insulation performance of the coating is further improved.
Preferably, the glass beads are hollow glass beads. The ceramic microspheres are vacuum ceramic microspheres. The vacuum ceramic microspheres have hard shells, and dilute gas is in the shells, so that the heat insulation performance of the coating can be further improved.
Preferably, the inorganic filler further comprises calcium sulfate whiskers. Preferably, the mass ratio of the inorganic binder to the microspheres to the tetrapod-like zinc oxide whiskers to the calcium sulfate whiskers is 25-50: 15-35: 5-10: 1-5. Preferably, the diameter of the calcium sulfate whisker is 5-8 μm, and the length of the calcium sulfate whisker is 20-150 μm.
Preferably, the mass ratio of the inorganic binder to the microbeads to the tetrapod-like zinc oxide whiskers to the calcium sulfate whiskers is 25-50: 15-35: 5-10: 3-5.
Preferably, the inorganic filler further comprises a powder filler; the powder filler is selected from at least one of diatomite and perlite. Preferably, the mass ratio of the inorganic binder to the microspheres to the tetrapod-like zinc oxide whiskers to the powder filler is 25-50: 15-35: 5-10: 1-10. Preferably, the mass ratio of the inorganic binder to the microspheres to the tetrapod-like zinc oxide whiskers to the powder filler is 25-50: 15-35: 5-10: 5-8.
Preferably, the adjuvant is selected from dispersants. Further preferably, the auxiliary agent further comprises at least one of a wetting agent, a defoaming agent, a leveling agent, a thickening agent, a bactericide and a mildew and algae preventing agent. Preferably, the auxiliary agent comprises a dispersing agent, a wetting agent, a defoaming agent, a leveling agent, a thickening agent, a bactericide and a mildew and algae preventing agent; the mass ratio of the auxiliary agent to the inorganic binder is 2-5: 25-50. Further preferably, the mass ratio of the auxiliary agent to the inorganic binder is 3-4: 25-50.
Preferably, the wetting agent is at least one selected from polyether modified siloxane wetting agents and fatty alcohol polyoxyethylene ether wetting agents.
Preferably, the defoaming agent is at least one selected from polyoxyethylene polyoxypropylene pentaerythritol ether defoaming agents and polyether modified polydimethylsiloxane defoaming agents.
Preferably, the leveling agent is at least one selected from an acrylate leveling agent and a polyacrylic leveling agent. Wherein the acrylic acid ester flatting agent belongs to a low molecular weight flatting agent, the polyacrylic acid flatting agent belongs to a high molecular weight flatting agent, and the acrylic acid ester flatting agent and the polyacrylic acid flatting agent belong to an acrylic acid flatting agent.
Preferably, the thickener is at least one selected from alkali swelling thickeners and polyurethane thickeners.
Preferably, the bactericide is at least one selected from isothiazolinone bactericides and dithiocarbamate bactericides.
Preferably, the mildew-proof algaecide is at least one selected from isothiazolinone mildew-proof algaecides and benzimidazole mildew-proof algaecides.
Preferably, the inorganic heat-insulating coating composition mainly comprises an inorganic binder and an inorganic filler; the inorganic filler comprises micro-beads, tetrapod-like zinc oxide whiskers, calcium sulfate whiskers and powder filler; the mass ratio of the inorganic binder to the microspheres to the tetrapod-like zinc oxide whiskers to the calcium sulfate whiskers to the powder filler is 30-50: 23-35: 7-10: 3-5: 5-8. Further preferably, the inorganic heat-insulating coating composition further comprises an auxiliary agent; the mass ratio of the auxiliary agent to the inorganic filler is 3-4: 30-50.
The inorganic heat-insulating coating provided by the invention consists of a solvent and the inorganic heat-insulating coating composition provided by the invention. The solvent commonly used in the field of inorganic coatings, for example, water, is used as the solvent of the inorganic heat-insulating coating of the invention. Water is preferred as the solvent for the inorganic thermal insulating coating of the present invention. The water is used as a solvent, so that the coating is environment-friendly and pollution-free in the use process.
Preferably, the mass ratio of the solvent to the inorganic binder in the inorganic heat-insulating coating composition is 15-20: 25-50.
Preferably, the viscosity of the inorganic heat-insulating coating is 70-120 KU.
The preparation method of the inorganic heat-insulating coating provided by the invention comprises the following steps: dispersing the dispersing agent in the solvent uniformly to obtain a mixed solution; and dispersing inorganic filler in the mixed solution, and then adding an inorganic binder for dispersion to obtain the composite material. The preparation method of the inorganic heat-insulating coating has the advantages of simple process, low production equipment cost and convenient popularization and application.
Preferably, the dispersant is at least one selected from polyphosphate and polycarboxylate. The polycarboxylate is selected from at least one of polycarboxylate sodium salt and polycarboxylate ammonium salt. The polycarboxylic acid ammonium salt is polyacrylic acid ammonium salt.
Preferably, the remaining auxiliary agent is added during or after the addition of the inorganic binder.
Preferably, the dispersing agent is dispersed in the solvent by using a dispersion plate, and the rotation speed of the dispersion plate is 300 rpm. The dispersing time of the dispersing agent in the solvent is 5-10 min.
Preferably, a dispersion plate is used for dispersing the inorganic filler in the mixed solution; the rotational speed of the dispersion disc during dispersion was 800 rpm. The time for dispersing the inorganic filler in the mixed solution is 30-70 min.
Preferably, the inorganic binder is added to the dispersion medium to perform dispersion, and the rotation speed of the dispersion plate is adjusted to 500rpm before the inorganic binder is added to perform dispersion. And adding the inorganic binder and the rest of the auxiliary agent, and then continuously dispersing for 10-30 min.
The technical solution of the present invention will be further described with reference to the following embodiments.
Examples 1 to 8 below are examples of the inorganic heat insulating coating composition, and examples 9 to 16 are examples of the inorganic heat insulating coating. In the embodiment, the adopted dispersant is a sodium polycarboxylate dispersant, the wetting agent is a fatty alcohol polyoxyethylene ether wetting agent, the defoaming agent is a polyether modified polydimethylsiloxane defoaming agent, the leveling agent is an acrylate leveling agent, the thickening agent is a polyurethane thickening agent, the bactericide is a dithiocarbamate bactericide, and the mildew-proof and algae-proof agent is isothiazolinone mildew-proof and algae-proof agents.
Example 1
The inorganic heat-insulating coating composition of the embodiment comprises the following components in parts by weight: 25 parts of inorganic binder, 10 parts of vacuum ceramic microspheres, 10 parts of hollow glass microspheres, 10 parts of powder filler, 10 parts of tetrapod-like zinc oxide whiskers, 5 parts of calcium sulfate whiskers and 5 parts of auxiliary agent; the adopted inorganic binder is lithium silicate, the average grain size of the vacuum ceramic microspheres is 30 microns, and the average grain size of the hollow glass microspheres is 30 microns; the adopted powder filler is diatomite; the average particle size of the diatomite is 33 μm; the diameter of the central body of the tetrapod-like zinc oxide whisker is 0.8 mu m, the length of the needle-like body is 80 mu m, and the diameter of the root of the needle-like body is 0.5 mu m; the diameter of the calcium sulfate crystal whisker is 5 mu m, the length-diameter ratio is 20 mu m, the auxiliary agent consists of a dispersing agent, a wetting agent, a defoaming agent, a leveling agent, a thickening agent, a bactericide and a mildew-proof and algae-proof agent, and the mass ratio of the dispersing agent, the wetting agent, the defoaming agent, the leveling agent, the thickener, the bactericide and the mildew-proof and algae-proof agent is 3: 1: 2: 3; the solvent is water.
Example 2
The inorganic heat-insulating coating composition of the embodiment comprises the following components in parts by weight: 40 parts of inorganic binder, 12 parts of vacuum ceramic microspheres, 10 parts of hollow glass microspheres, 10 parts of powder filler, 8 parts of tetrapod-like zinc oxide whiskers, 3 parts of calcium sulfate whiskers and 4 parts of assistant; the adopted inorganic binder is potassium silicate; the average grain size of the vacuum ceramic microspheres is 50 microns, and the average grain size of the hollow glass microspheres is 30 microns; the adopted powder filler comprises diatomite and perlite, the mass ratio of the diatomite to the perlite is 7:3, the average grain size of the diatomite is 33 mu m, and the average grain size of the perlite is 0.18 mm; the diameter of the central body of the tetrapod-like zinc oxide whisker is 1.0 mu m, the length of the needle-like body is 100 mu m, and the diameter of the root of the needle-like body is 5 mu m; the diameter of the calcium sulfate whisker is 6 μm, and the length-diameter ratio is 50 μm; the auxiliary agent consists of a dispersing agent, a wetting agent, a defoaming agent, a flatting agent, a thickening agent, a bactericide and a mildew-proof and algae-proof agent, wherein the mass ratio of the dispersing agent, the wetting agent, the defoaming agent, the flatting agent, the thickening agent, the bactericide and the mildew-proof and algae-proof agent is 4: 3: 4; the solvent is water.
Example 3
The inorganic heat-insulating coating composition of the embodiment comprises the following components in parts by weight: 50 parts of inorganic binder, 15 parts of vacuum ceramic microspheres, 8 parts of hollow glass microspheres, 10 parts of powder filler, 5 parts of tetrapod-like zinc oxide whiskers, 1 part of calcium sulfate whiskers and 2 parts of assistant; the adopted inorganic binder is silica sol, the average grain size of the vacuum ceramic microspheres is 60 mu m, and the average grain size of the hollow glass microspheres is 50 mu m; the adopted powder filler comprises diatomite and perlite, the mass ratio of the diatomite to the perlite is 1:1, the average grain size of the diatomite is 33 mu m, and the average grain size of the perlite is 0.18 mm; the diameter of the central body of the tetrapod-like zinc oxide whisker is 1.0 mu m, the length of the needle-like body is 120 mu m, and the diameter of the root of the needle-like body is 5 mu m; the diameter of the calcium sulfate whisker is 6 μm, and the length-diameter ratio is 60 μm; the auxiliary agent consists of a dispersing agent, a wetting agent, a defoaming agent, a flatting agent, a thickening agent, a bactericide and a mildew-proof and algae-proof agent, wherein the mass ratio of the dispersing agent, the wetting agent, the defoaming agent, the flatting agent, the thickening agent, the bactericide and the mildew-proof and algae-proof agent is 5: 3: 5; the solvent is water.
Example 4
The inorganic heat-insulating coating composition of the embodiment comprises the following components in parts by weight: 30 parts of inorganic binder, 15 parts of vacuum ceramic microspheres, 10 parts of hollow glass microspheres, 10 parts of powder filler, 7 parts of tetrapod-like zinc oxide whiskers, 5 parts of calcium sulfate whiskers and 3 parts of assistant; the adopted inorganic binder is sodium silicate, the average grain size of the vacuum ceramic microspheres is 80 microns, and the average grain size of the hollow glass microspheres is 120 microns; the adopted powder filler comprises diatomite and perlite, the mass ratio of the diatomite to the perlite is 3:7, the average grain size of the diatomite is 33 mu m, and the average grain size of the perlite is 0.18 mm; the diameter of the central body of the tetrapod-like zinc oxide whisker is 1.2 mu m, the length of the needle-like body is 150 mu m, and the diameter of the root of the needle-like body is 6 mu m; the diameter of the calcium sulfate whisker is 7 μm, and the length-diameter ratio is 120 μm; the auxiliary agent consists of a dispersing agent, a wetting agent, a defoaming agent, a flatting agent, a thickening agent, a bactericide and a mildew-proof and algae-proof agent, wherein the mass ratio of the dispersing agent, the wetting agent, the defoaming agent, the flatting agent, the thickening agent, the bactericide and the mildew-proof and algae-proof agent is 6: 4: 5; the solvent is water.
Example 5
The inorganic heat-insulating coating composition of the embodiment comprises the following components in parts by weight: 35 parts of inorganic binder, 20 parts of vacuum ceramic microspheres, 12 parts of hollow glass microspheres, 10 parts of powder filler, 10 parts of tetrapod-like zinc oxide whiskers, 3 parts of calcium sulfate whiskers and 4 parts of auxiliary agent; the adopted inorganic binder is potassium silicate, the average grain size of the vacuum ceramic microspheres is 100 microns, and the average grain size of the hollow glass microspheres is 120 microns; the adopted powder filler comprises diatomite and perlite, the mass ratio of the diatomite to the perlite is 1:9, the average grain size of the diatomite is 33 mu m, and the average grain size of the perlite is 0.18 mm; the diameter of the central body of the tetrapod-like zinc oxide whisker is 1.2 mu m, the length of the needle-like body is 180 mu m, and the diameter of the root of the needle-like body is 6 mu m; the diameter of the calcium sulfate whisker is 8 μm, and the length-diameter ratio is 150 μm; the auxiliary agent consists of a dispersing agent, a wetting agent, a defoaming agent, a flatting agent, a thickening agent, a bactericide and a mildew-proof and algae-proof agent, wherein the mass ratio of the dispersing agent, the wetting agent, the defoaming agent, the flatting agent, the thickening agent, the bactericide and the mildew-proof and algae-proof agent is 7: 5: 7; the solvent is water.
Example 6
The inorganic heat-insulating coating composition of the embodiment comprises the following components in parts by weight: 45 parts of inorganic binder, 20 parts of vacuum ceramic microspheres, 15 parts of hollow glass microspheres, 10 parts of powder filler, 15 parts of tetrapod-like zinc oxide whiskers and 3 parts of auxiliary agent; the adopted inorganic binder is silica sol, the average grain size of the hollow ceramic microspheres is 120 mu m, and the average grain size of the hollow glass microspheres is 100 mu m; the powder filler is perlite, and the average grain size of the perlite is 0.18 mm; the diameter of the central body of the tetrapod-like zinc oxide whisker is 1.2 mu m, the length of the needle-like body is 200 mu m, and the diameter of the root of the needle-like body is 10 mu m; the auxiliary agent consists of a dispersing agent, a wetting agent, a defoaming agent, a flatting agent, a thickening agent, a bactericide and a mildew-proof and algae-proof agent, wherein the mass ratio of the dispersing agent, the wetting agent, the defoaming agent, the flatting agent, the thickening agent, the bactericide and the mildew-proof and algae-proof agent is 8: 5: 8; the solvent is water.
Example 7
The inorganic thermal insulating coating composition of the present example is different from the inorganic thermal insulating coating composition of example 5 only in that: the adopted inorganic binder is aluminum dihydrogen phosphate, and the adopted hollow glass beads are 5 parts and the powder filler is 1 part by weight.
Example 8
The inorganic thermal insulating coating composition of the present example is different from the inorganic thermal insulating coating composition of example 5 only in that: the adopted inorganic binder is aluminum borate, and the adopted powder filler accounts for 6 parts by weight.
Example 9
The inorganic thermal insulation coating of the embodiment is composed of water and the inorganic thermal insulation coating composition of the embodiment 1; the mass ratio of the water to the inorganic binder in the inorganic heat-insulating coating composition was 20: 25, and the viscosity was 70 KU.
The preparation method of the inorganic heat-insulating coating comprises the following steps:
1) adding a dispersing agent into water, and dispersing for 5min under a dispersion disc with the rotation speed of 300rpm in a dispersion cylinder to fully mix and uniformly disperse the dispersing agent to obtain a mixed solution;
2) adjusting the rotating speed of a dispersion disc to 800rpm, sequentially adding vacuum ceramic microspheres, hollow glass microspheres, powder filler, tetrapod-like zinc oxide whiskers and calcium sulfate whiskers into the mixed solution obtained in the step 1), and stirring for 30min to uniformly disperse the materials to obtain a dispersion solution;
3) and (3) regulating the rotation speed of the dispersion disc to 500rpm, continuously adding the silicate inorganic binder, the wetting agent, the defoaming agent, the leveling agent, the bactericide and the mildew-proof and algae-proof agent into the dispersion liquid obtained in the step 2), adding the thickening agent into the dispersion liquid to regulate the viscosity, and stirring the mixture for 10min to obtain the mildew-proof and algae-proof agent.
Example 10
The inorganic thermal insulation coating of the embodiment is composed of water and the inorganic thermal insulation coating composition of the embodiment 2; the mass ratio of the water to the inorganic binder in the inorganic heat-insulating coating composition was 15:40, and the viscosity was 85 KU.
The preparation method of the inorganic heat-insulating coating comprises the following steps:
1) adding a dispersing agent into water, and dispersing for 8min under a dispersion disc with the rotation speed of 300rpm in a dispersion cylinder to fully mix and uniformly disperse the dispersing agent to obtain a mixed solution;
2) adjusting the rotating speed of a dispersion disc to 800rpm, sequentially adding vacuum ceramic microspheres, hollow glass microspheres, powder filler, tetrapod-like zinc oxide whiskers and calcium sulfate whiskers into the mixed solution obtained in the step 1), and stirring for 40min to uniformly disperse the materials to obtain a dispersion solution;
3) and (3) regulating the rotation speed of the dispersion disc to 500rpm, continuously adding the silicate inorganic binder, the wetting agent, the defoaming agent, the leveling agent, the bactericide and the mildew-proof and algae-proof agent into the dispersion liquid obtained in the step 2), adding the thickening agent into the dispersion liquid to regulate the viscosity, and stirring the mixture for 20min to obtain the mildew-proof and algae-proof agent.
Example 11
The inorganic thermal insulation coating of the embodiment is composed of water and the inorganic thermal insulation coating composition of the embodiment 3; the mass ratio of the water to the inorganic binder in the inorganic heat-insulating coating composition is 16: 50, and the viscosity is 85 KU.
The preparation method of the inorganic heat-insulating coating comprises the following steps:
1) adding a dispersing agent into water, and dispersing for 10min under a dispersion disc with the rotation speed of 300rpm in a dispersion cylinder to fully mix and uniformly disperse the dispersing agent to obtain a mixed solution;
2) adjusting the rotating speed of a dispersion disc to 800rpm, sequentially adding vacuum ceramic microspheres, hollow glass microspheres, powder filler, tetrapod-like zinc oxide whiskers and calcium sulfate whiskers into the mixed solution obtained in the step 1), and stirring for 70min to uniformly disperse the materials to obtain a dispersion solution;
3) and (3) regulating the rotation speed of the dispersion disc to 500rpm, continuously adding the silicate inorganic binder, the wetting agent, the defoaming agent, the leveling agent, the bactericide and the mildew-proof and algae-proof agent into the dispersion liquid obtained in the step 2), adding the thickening agent into the dispersion liquid to regulate the viscosity, and stirring the mixture for 30min to obtain the mildew-proof and algae-proof agent.
Example 12
The inorganic thermal insulation coating of the embodiment is composed of water and the inorganic thermal insulation coating composition of the embodiment 4; the mass ratio of the water to the inorganic binder in the inorganic heat-insulating coating composition is 15: 30, and the viscosity is 100 KU.
The preparation method of the inorganic heat-insulating coating comprises the following steps:
1) adding a dispersing agent into water, and dispersing for 5min under a dispersion disc with the rotation speed of 300rpm in a dispersion cylinder to fully mix and uniformly disperse the dispersing agent to obtain a mixed solution;
2) adjusting the rotating speed of a dispersion disc to 800rpm, sequentially adding vacuum ceramic microspheres, hollow glass microspheres, powder filler, tetrapod-like zinc oxide whiskers and calcium sulfate whiskers into the mixed solution obtained in the step 1), and stirring for 30min to uniformly disperse the materials to obtain a dispersion solution;
3) and (3) regulating the rotation speed of the dispersion disc to 500rpm, continuously adding the silicate inorganic binder, the wetting agent, the defoaming agent, the leveling agent, the bactericide and the mildew-proof and algae-proof agent into the dispersion liquid obtained in the step 2), adding the thickening agent into the dispersion liquid to regulate the viscosity, and stirring the mixture for 10min to obtain the mildew-proof and algae-proof agent.
Example 13
The inorganic thermal insulation coating of the embodiment is composed of water and the inorganic thermal insulation coating composition of the embodiment 5; the mass ratio of the water to the inorganic binder in the inorganic heat-insulating coating composition was 17: 35, and the viscosity was 120 KU.
The preparation method of the inorganic heat-insulating coating comprises the following steps:
1) adding a dispersing agent into water, and dispersing for 8min under a dispersion disc with the rotation speed of 300rpm in a dispersion cylinder to fully mix and uniformly disperse the dispersing agent to obtain a mixed solution;
2) adjusting the rotating speed of a dispersion disc to 800rpm, sequentially adding vacuum ceramic microspheres, hollow glass microspheres, powder filler, tetrapod-like zinc oxide whiskers and calcium sulfate whiskers into the mixed solution obtained in the step 1), and stirring for 40min to uniformly disperse the materials to obtain a dispersion solution;
3) and (3) regulating the rotation speed of the dispersion disc to 500rpm, continuously adding the silicate inorganic binder, the wetting agent, the defoaming agent, the leveling agent, the bactericide and the mildew-proof and algae-proof agent into the dispersion liquid obtained in the step 2), adding the thickening agent into the dispersion liquid to regulate the viscosity, and stirring the mixture for 20min to obtain the mildew-proof and algae-proof agent.
Example 14
The inorganic thermal insulation coating of the embodiment is composed of water and the inorganic thermal insulation coating composition of the embodiment 6; the mass ratio of the water to the inorganic binder in the inorganic heat-insulating coating composition is 20: 45, and the viscosity is 120 KU.
The preparation method of the inorganic heat-insulating coating comprises the following steps:
1) adding a dispersing agent into water, and dispersing for 10min under a dispersion disc with the rotation speed of 300rpm in a dispersion cylinder to fully mix and uniformly disperse the dispersing agent to obtain a mixed solution;
2) adjusting the rotating speed of a dispersion disc to 800rpm, sequentially adding vacuum ceramic microspheres, hollow glass microspheres, powder fillers and tetrapod-like zinc oxide whiskers into the mixed solution obtained in the step 1), and stirring for 70min to uniformly disperse the mixture to obtain a dispersion liquid;
3) and (3) regulating the rotation speed of the dispersion disc to 500rpm, continuously adding the silicate inorganic binder, the wetting agent, the defoaming agent, the leveling agent, the bactericide and the mildew-proof and algae-proof agent into the dispersion liquid obtained in the step 2), adding the thickening agent into the dispersion liquid to regulate the viscosity, and stirring the mixture for 30min to obtain the mildew-proof and algae-proof agent.
Example 15
The inorganic thermal insulation coating of the embodiment is composed of water and the inorganic thermal insulation coating composition of the embodiment 7; the mass ratio of the water to the inorganic binder in the inorganic heat-insulating coating composition was 17: 35, and the viscosity was 120 KU.
The preparation method of the inorganic heat-insulating coating comprises the following steps:
1) adding a dispersing agent into water, and dispersing for 10min under a dispersion disc with the rotation speed of 300rpm in a dispersion cylinder to fully mix and uniformly disperse the dispersing agent to obtain a mixed solution;
2) adjusting the rotating speed of a dispersion disc to 800rpm, sequentially adding vacuum ceramic microspheres, hollow glass microspheres, powder filler, tetrapod-like zinc oxide whiskers and calcium sulfate whiskers into the mixed solution obtained in the step 1), and stirring for 70min to uniformly disperse the materials to obtain a dispersion solution;
3) and (3) regulating the rotation speed of the dispersion disc to 500rpm, continuously adding the silicate inorganic binder, the wetting agent, the defoaming agent, the leveling agent, the bactericide and the mildew-proof and algae-proof agent into the dispersion liquid obtained in the step 2), adding the thickening agent into the dispersion liquid to regulate the viscosity, and stirring the mixture for 30min to obtain the mildew-proof and algae-proof agent.
Example 16
The inorganic thermal insulation coating of the embodiment is composed of water and the inorganic thermal insulation coating composition of the embodiment 8; the mass ratio of the water to the inorganic binder in the inorganic heat-insulating coating composition was 17: 35, and the viscosity was 120 KU.
The preparation method of the inorganic heat-insulating coating comprises the following steps:
1) adding a dispersing agent into water, and dispersing for 10min under a dispersion disc with the rotation speed of 300rpm in a dispersion cylinder to fully mix and uniformly disperse the dispersing agent to obtain a mixed solution;
2) adjusting the rotating speed of a dispersion disc to 800rpm, sequentially adding vacuum ceramic microspheres, hollow glass microspheres, powder filler, tetrapod-like zinc oxide whiskers and calcium sulfate whiskers into the mixed solution obtained in the step 1), and stirring for 70min to uniformly disperse the materials to obtain a dispersion solution;
3) and (3) regulating the rotation speed of the dispersion disc to 500rpm, continuously adding the silicate inorganic binder, the wetting agent, the defoaming agent, the leveling agent, the bactericide and the mildew-proof and algae-proof agent into the dispersion liquid obtained in the step 2), adding the thickening agent into the dispersion liquid to regulate the viscosity, and stirring the mixture for 30min to obtain the mildew-proof and algae-proof agent.
Comparative example
The inorganic heat-insulating coating of the present comparative example differs in composition from the inorganic heat-insulating coating of example 8 only in that it does not contain tetrapod-like zinc oxide whiskers and calcium sulfate whiskers; the preparation method comprises the following steps:
1) adding a dispersing agent into water, and dispersing for 8min under a dispersion disc with the rotation speed of 300rpm in a dispersion cylinder to fully mix and uniformly disperse the dispersing agent to obtain a mixed solution;
2) adjusting the rotating speed of a dispersion disc to 800rpm, sequentially adding the vacuum ceramic microspheres, the hollow glass microspheres and the powder filler into the mixed solution, and stirring for 40min to uniformly disperse the mixture to obtain a dispersion liquid;
3) and (3) regulating the rotation speed of the dispersion disc to 500rpm, continuously adding the silicate inorganic binder, the wetting agent, the defoaming agent, the leveling agent, the bactericide and the mildew-proof and algae-proof agent into the dispersion liquid obtained in the step 2), adding the thickening agent into the dispersion liquid to regulate the viscosity to 90KU, and stirring the mixture for 20min to prepare the inorganic heat-insulating coating.
Experimental example 1
The inorganic heat-insulating coatings in the embodiments 9-14 and the comparative examples are respectively subjected to adhesion, water resistance, alkali resistance, heat-insulating property and temperature change resistance tests, the coating adhesion is tested according to the GB/T9286-1998 color paint and varnish marking test standard, the water resistance is tested according to the GB/T1733-1993 paint film water resistance test method standard, the coating alkali resistance is tested according to the GB/T9265-1988-determination of alkali resistance of architectural coating coatings, and the temperature change resistance is tested according to JG/T25-2017-determination of freeze-thaw resistance of architectural coating coatings. The test results are shown in Table 1.
TABLE 1 Performance test results of inorganic insulating coatings of examples 9 to 14 and comparative examples
Figure BDA0002054704440000111
Figure BDA0002054704440000121
From the data in table 1, it can be seen that: the inorganic heat-insulating coating has good heat-insulating property, temperature change resistance, adhesive force, water resistance and alkali resistance; and the temperature change resistance of the inorganic heat-insulating coating can be obviously improved and enhanced by adding the high-elasticity modulus tetrapod-like zinc oxide whiskers and the high-modulus high-toughness calcium sulfate whiskers.

Claims (6)

1. An inorganic heat-insulating coating composition is characterized in that: mainly consists of inorganic binder and inorganic filler; the inorganic filler consists of micro-beads, tetrapod-like zinc oxide whiskers, calcium sulfate whiskers and powder filler; the mass ratio of the inorganic binder to the microspheres to the tetrapod-like zinc oxide whiskers to the calcium sulfate whiskers to the powder filler is 25-50: 15-35: 5-10: 1-5: 1-10; the tetrapod-like zinc oxide whisker has a three-dimensional tetrapod-like three-dimensional structure, the diameter of a central body of the tetrapod-like zinc oxide whisker is 0.8-1.2 mu m, the length of a needle-like body is 50-200 mu m, and the diameter of the root of the needle-like body is 0.5-10 mu m; the diameter of the calcium sulfate whisker is 5-8 mu m, and the length of the calcium sulfate whisker is 20-150 mu m; the average particle size of the microbeads is 30-120 mu m; the powder filler is selected from at least one of diatomite and perlite.
2. The inorganic thermal insulating coating composition according to claim 1, characterized in that: the micro-beads comprise ceramic micro-beads and glass micro-beads; the mass ratio of the ceramic beads to the glass beads is 10-20: 5-15.
3. The inorganic thermal insulating coating composition according to claim 1, characterized in that: at least a part of the microbeads have a hollow structure.
4. The inorganic thermal insulating coating composition according to claim 1, characterized in that: the inorganic heat-insulating coating composition also comprises an auxiliary agent; the mass ratio of the auxiliary agent to the inorganic binder is not more than 1: 5.
5. An inorganic heat-insulating coating is characterized in that: comprising a solvent and the inorganic thermal insulating coating composition of claim 1.
6. The inorganic thermal insulation coating according to claim 5, characterized in that: the viscosity of the inorganic heat-insulating coating is 70-120 KU.
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