CN109456626B - Multilayer coating with heat preservation and heat insulation functions and preparation method thereof - Google Patents

Multilayer coating with heat preservation and heat insulation functions and preparation method thereof Download PDF

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CN109456626B
CN109456626B CN201811332717.0A CN201811332717A CN109456626B CN 109456626 B CN109456626 B CN 109456626B CN 201811332717 A CN201811332717 A CN 201811332717A CN 109456626 B CN109456626 B CN 109456626B
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coating
weight
agent
heat
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CN109456626A (en
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葛岫岩
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Henan Huoda New Building Materials Co ltd
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Henan Huoda New Building 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
    • 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
    • C09D133/00—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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04—Homopolymers or copolymers of esters
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    • 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
    • C09D5/002—Priming 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
    • C09D5/004—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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/43—Thickening agents
    • C09D7/44—Combinations of two or more thickening agents
    • 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
    • C09D7/63—Additives non-macromolecular organic
    • 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
    • C09D7/65—Additives macromolecular
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
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  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)
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Abstract

The invention discloses a multilayer coating with heat preservation and heat insulation and a preparation method thereof, wherein the multilayer coating comprises a base layer coating, a middle layer coating and a finish coating, wherein the middle layer coating comprises the following components, by weight, 25-30 parts of water glass, 10-30 parts of expanded perlite, 15-30 parts of vitrified micro bubbles, 5-25 parts of asbestos wool, 5-15 parts of vermiculite and 10-25 parts of sepiolite powder; the finish paint comprises the following components in parts by weight: 10-20 parts of deionized water, 1.5-3 parts of propylene glycol, 0.15-1 part of multifunctional auxiliary agent, 0.1-0.5 part of X-405 wetting agent, 1-2 parts of dispersing agent, 0.15-1 part of defoaming agent, 8-15 parts of heat-insulating powder, 15-25 parts of titanium dioxide, 0.15-1 part of preservative, 30-50 parts of pure acrylic emulsion, 1.5-3 parts of film-forming auxiliary agent and 0.5-2 parts of thickening agent.

Description

Multilayer coating with heat preservation and heat insulation functions and preparation method thereof
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a barrier type composite heat-insulating material and a preparation method thereof.
Background
Along with the improvement of the living standard of people, people pay more and more attention to the heat preservation and energy conservation performance of buildings, and the setting of the heat preservation performance of the outer wall of the building is not only an energy-saving and environment-friendly measure but also determines the comfort level of the interior of the building to a great extent. The conventional heat preservation mode of building outer wall sets up the heated board at the outer wall, but this kind of mode not only the complex later stage of operation easily drops and causes danger, and is higher to the cost moreover, is unfavorable for the large tracts of land and promotes. In order to solve the problem, the thermal insulation coating is sprayed on the surface of the outer wall, so that the appearance is attractive and elegant, and the construction is convenient. According to different working mechanisms and heat insulation modes of heat insulation materials, heat insulation coatings can be divided into barrier type heat insulation coatings, reflection type heat insulation coatings and radiation type heat insulation coatings.
The existing coating mostly adopts a heat preservation mechanism to produce heat preservation coating, but the heat preservation effect of the product is not strong, the heat preservation effect is far lower than that of a composite material with multiple heat preservation modes under the same coating volume, but after the existing heat preservation coating adopts multiple composite materials, because the firmness between the coatings is not strong, the phenomena of peeling and large-area falling are easy to occur after the coating is used for a period of time, and the traditional coating preparation process is relatively complex and is not beneficial to wide popularization.
Disclosure of Invention
In order to solve the problems, the invention designs the heat-insulating multilayer coating and the preparation method thereof, and the coating has the advantages of simple preparation process, cheap and easily-obtained raw materials, strong heat-insulating effect, strong waterproof effect and strong firmness of the paint surface.
In order to achieve the purpose, the invention adopts the following technical scheme: a multi-layer coating with heat preservation and heat insulation comprises a base layer coating, a middle layer coating and a finish coating from inside to outside, wherein the middle layer coating comprises the following components, by weight, 25-30 parts of water glass, 10-30 parts of expanded perlite, 15-30 parts of vitrified micro bubbles, 5-25 parts of asbestos wool, 5-15 parts of vermiculite and 10-25 parts of sepiolite powder;
the finish paint comprises the following components in parts by weight: 10-20 parts of deionized water, 1.5-3 parts of propylene glycol, 0.15-1 part of multifunctional auxiliary agent, 0.1-0.5 part of X-405 wetting agent, 1-2 parts of dispersing agent, 0.15-1 part of defoaming agent, 8-15 parts of heat insulating powder, 15-25 parts of titanium dioxide, 0.15-1 part of preservative, 30-50 parts of pure acrylic emulsion, 1.5-3 parts of film forming auxiliary agent and 0.5-2 parts of thickening agent.
The invention is further improved as a multi-layer coating with heat preservation and heat insulation: the middle layer coating also comprises 1.5-8 parts of aluminium dihydrogen tripolyphosphate.
The invention is further improved as a multi-layer coating with heat preservation and heat insulation: the middle layer coating comprises the following components, by weight, 25 parts of water glass, 10 parts of expanded perlite, 15 parts of vitrified micro bubbles, 10 parts of asbestos wool, 8 parts of vermiculite and 10 parts of sepiolite powder;
the finish paint comprises the following components in parts by weight: 15 parts of deionized water, 2 parts of propylene glycol, 0.15 part of multifunctional auxiliary agent, 0.2 part of X-405 wetting agent, 1 part of dispersing agent, 0.15 part of defoaming agent, 10 parts of heat insulating powder, 20 parts of titanium dioxide, 0.15 part of preservative, 40 parts of pure acrylic emulsion, 2 parts of film-forming auxiliary agent and 0.8 part of thickening agent.
The invention is further improved as a multi-layer coating with heat preservation and heat insulation: the method is characterized in that: the modulus of the water glass is 2.8-3.2.
The invention is further improved as a multi-layer coating with heat preservation and heat insulation: the thickening agent comprises a modified alkali solution thickening agent and hydroxyethyl cellulose thickening agent, wherein the modified alkali solution thickening agent is alkali solution acrylic emulsion.
The invention is further improved as a multi-layer coating with heat preservation and heat insulation: the weight ratio of the modified alkali solution thickener to the hydroxyethyl cellulose thickener is 5: 3.
The invention is further improved as a multi-layer coating with heat preservation and heat insulation: the film-forming assistant is 2-amino-2-methyl-1-propanol.
The invention is further improved as a multi-layer coating with heat preservation and heat insulation: the defoaming agent is one or a mixture of inorganic silicon modified mineral oil, polyoxypropylene glycerol ether and modified siloxane.
In order to achieve the purpose, the invention adopts the following technical scheme: a preparation method of a multilayer coating with heat preservation and heat insulation, wherein a middle layer coating is prepared by the following method,
a. respectively putting the expanded perlite, the sepiolite powder and the vermiculite into a grinding machine for grinding, and taking the expanded perlite of 80-100 meshes, the sepiolite powder of 300 meshes and the vermiculite of 40-60 meshes for later use;
b. placing the ground expanded perlite and the vermiculite in parts by weight into a dispersion tank, adding 2/3 water glass into the dispersion tank, mixing and stirring at the speed of 100 revolutions per minute, and adding asbestos wool in the stirring process until the mixture is not sticky;
c. respectively adding aluminum dihydrogen tripolyphosphate and the ground sepiolite powder into the viscous mixture, and continuously stirring for 20-30 minutes;
d. adding 80-100 mesh vitrified micro bubbles and the rest water glass into the mixture, and dispersing and stirring for 10-20 minutes at the rotating speed of 80-100 revolutions per minute to obtain the middle layer coating.
In the operation process, the water glass is dissolved in water.
In order to achieve the purpose, the invention adopts the following technical scheme: a preparation method of a multilayer coating with heat preservation and heat insulation, wherein a middle layer coating is prepared by the following method,
a. taking deionized water, propylene glycol, a multifunctional additive, an X-405 wetting agent, a dispersing agent, a defoaming agent and heat insulation powder according to the parts by weight, and placing the materials into a dispersion machine to disperse for 10-15 minutes at the rotating speed of 1400-1600 rpm;
b. transferring the uniformly mixed mixture into a grinding machine to grind until the particle diameter is less than 40 nanometers; adding titanium dioxide and a preservative into the mixture according to the parts by weight, and uniformly stirring;
c. adding the pure acrylic emulsion, the film forming additive and the thickening agent according to the parts by weight, mixing and stirring to obtain the finish paint.
The composite coating designed by the invention has three layers of coatings, wherein the primer adopts a closed primer which can block the alkaline position and water in the wall, the finish adopts a reflective coating which reflects the near infrared light in the sunlight to the atmosphere without absorbing the light, the connection strength of the coating on the finish surface is enhanced by utilizing the hydrolysis and bond connection of a polymer in the finish material, and the leveling operation of the coating is facilitated on the premise of ensuring the strength of the coating.
In the finish paint, the hydroxyethyl cellulose thickener is associated with the surrounding water molecules through hydrogen bonds through the main chain of the hydroxyethyl cellulose thickener to form a net structure in the mixed material, so that the free movement space of particles in the mixture is reduced, and the viscosity of the mixture is improved. When the coating added with the cellulose thickener is used, a hydration layer formed by the thickener and water is easy to damage in the coating process, so that the viscosity of the coating is quickly recovered, the coating is gelatinized, and the leveling operation of the coating is not facilitated.
The modified alkali solution thickener is alkali swelling acrylic emulsion which needs an alkaline environment to dissociate carboxylate radicals of the alkali swelling acrylic emulsion, alkaline film-forming aid AMP-95 is added in the invention, and the alkalinity of the film-forming aid dissociates carboxylate radicals in molecules of the film-forming aid, so that molecular chains are stretched from a spiral shape to a rod shape through the same-polarity electrostatic repulsion among carboxylate ions, the hydrogen bond association of the molecular chains and water molecules is increased, the viscosity of a water phase is improved, and meanwhile, the long-time water concentration of the composite finish paint after coating is ensured. According to the invention, the modified alkali solution thickener and the hydroxyethyl cellulose thickener are added into the same mixed system, and are combined with water molecules to form different net structures, so that the mixed system structure is more stable through mutual combination and interpenetration of the net structures formed by the two.
In the middle layer coating, macroscopic expression is as follows: in the preparation process of the middle layer coating, sodium silicate is used as a base material, aluminium dihydrogen tripolyphosphate is used as a binding agent, vermiculite, expanded perlite and vitrified micro bubbles are bonded into a whole, the specific gravity of the expanded vermiculite is 60-180Kg/m3, and the heat conductivity coefficient is low. The free sepiolite powder is taken as a thickening agent and is filled into a frame formed by vermiculite, expanded perlite and vitrified micro-beads, and after the sepiolite powder fills gaps, fibers with the length of 4-8mm on the surface can stably fix the sepiolite powder in the gaps, so that the gaps of the composite material are reduced, the convection heat conduction of the composite material is reduced, and the heat reflection performance of the composite material is improved.
The vermiculite has a unique lamellar structure, the specific scales on the particle surfaces can perform heat reflection radiation, the effect of the asbestos wool in the composite material is greatly related to the proportion of the asbestos wool in the composite material, when the content of the asbestos wool is low, the asbestos wool cannot play a role of a supporting framework, when the content of the asbestos wool is high, the asbestos wool is mutually overlapped, so that the composite material conducts heat through a solid phase, and the heat conductivity of the composite coating is obviously improved, the volume content of the asbestos wool in the middle layer coating is about 10%, and the asbestos wool with the volume proportion not only enhances the strength of the composite coating frame, but also cannot cause the heat conductivity of the composite material to be improved due to overhigh content of the asbestos wool. The diameter of the selected asbestos wool is 0.1-30 μm, and the fiber of the asbestos wool is more than 0.5cm and less than 10 cm.
Microscopically: the heat insulating material is composed of solid particles and air holes or fibers and air holes, so that the heat insulating material has a plurality of heat conducting modes in the heat conducting process, and specifically comprises the following steps: the heat transfer between solid phase and gas phase, the heat transfer between solid phases, the convection heat transfer and the radiation heat transfer between gas phases in the holes are generally involved in the heat transfer of materials.
The thermal conductivity of the framework material of the composite material, the solid-phase thermal conductivity coefficient and the gas-phase volume fraction of the framework material satisfy the following relations:
λ1∝（1-ε）λs
wherein λ1The thermal conductivity of the material is shown as the formula, wherein epsilon is the volume fraction of a gas phase, and lambdas is the thermal conductivity of a solid phase, the thermal conductivity of the material and the porosity of the material are in a linear decreasing relation, and the higher the porosity is, the smaller the thermal conductivity is, and the better the thermal insulation effect of the material is; on the contrary, the lower the porosity, the higher the thermal conductivity, and the poorer the heat preservation effect of the material.
The components of the expanded perlite mainly comprise SiO2, Al2O3, Fe2O3, CaO, K2O and Na2O, phosphate radicals in the aluminum dihydrogen tripolyphosphate monomer are phosphorus-oxygen tetrahedrons, wherein the phosphate radicals and the phosphate radicals are bridged with metal ions in mixed expanded perlite, vermiculite and the like to form long-chain or reticular high-molecular polymers, free movement spaces of particles in the mixture are reduced, suspended particles in the mixture are confined in a reticular structure, and therefore the aluminum dihydrogen tripolyphosphate has the characteristics of large binding power and high strength, and the viscosity of the mixture in the coating can be improved.
The components of the expanded perlite mainly comprise SiO2, Al2O3, Fe2O3, CaO, K2O and Na2O, the vitrified micro bubbles are porous inside, the surface of the vitrified micro bubbles is vitrified into spherical fine-diameter particles, the vitrified micro bubbles can be used as light aggregate, the fluidity of mortar is improved, the shrinkage rate of the material is small, the expanded perlite is mostly used as the aggregate in the conventional coating, but the water absorption of the expanded perlite is large, and the coating is easy to pulverize after being coated.
Advantageous effects
Compared with the prior art, the invention has the following beneficial effects:
first, the base material and additive of the multilayer coating of the invention are mainly inorganic substances, which reduces the pollution to the environment and is an environment-friendly coating.
Secondly, the multilayer coating disclosed by the invention is used for carrying out heat preservation treatment on the surface of a wall in a spraying mode, has no requirement on the wall structure, is suitable for any special-shaped wall, and is an excellent substitute for conventional heat preservation plates such as traditional extruded sheets and polystyrene boards.
Thirdly, the sealing effect of the primer of the multilayer coating isolates the alkaline substances and water on the wall surface, so that the corrosion of the coating outside the wall is prevented, and the heat insulation effect of the coating is improved; the reflectivity of the middle layer coating is higher, the temperature change range of the coating is shortened, the sunlight aging of the coating is reduced, and the service life of the coating is prolonged.
Fourthly, the multi-layer coating of the invention forms a net structure through the polymerization reaction of high polymer in the finish coating, thus greatly improving the crack resistance of the finish coating.
Detailed Description
The present invention is further described with reference to the following specific examples, which are provided for the purpose of explaining the technical solutions of the present invention in detail.
Example 1
The multilayer coating with heat preservation and insulation comprises a base coating, a middle coating and a finish coating from inside to outside, wherein the middle coating comprises the following components, by weight, 25 parts of water glass with the modulus of sodium silicate of 3.2, 10 parts of expanded perlite, 15 parts of vitrified micro bubbles, 10 parts of asbestos wool, 8 parts of vermiculite, 10 parts of sepiolite powder and 1.5 parts of aluminium dihydrogen tripolyphosphate;
the finish paint comprises the following components in parts by weight: 15 parts of deionized water, 2 parts of propylene glycol, 0.15 part of multifunctional auxiliary agent, 0.2 part of X-405 wetting agent, 1 part of dispersing agent, 0.15 part of inorganic silicon modified mineral oil defoaming agent, 10 parts of heat insulation powder, 20 parts of titanium dioxide, 0.15 part of preservative, 40 parts of pure acrylic emulsion, 2 parts of 2-amino-2-methyl-1-propanol, and 0.8 part of thickening agent formed by mixing modified alkali solution thickening agent and hydroxyethyl cellulose thickening agent, wherein the mixing ratio of the modified alkali solution thickening agent to the hydroxyethyl cellulose thickening agent is 5: 3.
The thermal conductivity coefficient of the thermal insulation composite coating of the embodiment is 0.035W/(m.k) at room temperature.
Example 2
The multilayer coating with heat preservation and heat insulation comprises a base coating, a middle coating and a finish coating from inside to outside, wherein the middle coating comprises the following components in parts by weight: 25 parts of sodium silicate with the modulus of 3.0, 15 parts of expanded perlite, 15 parts of vitrified micro bubbles, 8 parts of asbestos wool, 8 parts of vermiculite, 15 parts of sepiolite powder and 2 parts of aluminium dihydrogen tripolyphosphate;
the finish paint comprises the following components in parts by weight: 10 parts of deionized water, 1.5 parts of propylene glycol, 0.15 part of multifunctional auxiliary agent, 0.1 part of X-405 wetting agent, 1 part of dispersing agent, 0.15 part of defoaming agent consisting of inorganic silicon modified mineral oil and polyoxypropylene glycerol ether, 8 parts of heat insulating powder, 15 parts of titanium dioxide, 0.15 part of preservative, 30 parts of pure acrylic emulsion, 1.5 parts of 2-amino-2-methyl-1-propanol and 0.5 part of thickener formed by mixing modified alkali solution thickener and hydroxyethyl cellulose thickener, wherein the mixing ratio of the modified alkali solution thickener to the hydroxyethyl cellulose thickener is 5: 3.
The thermal conductivity coefficient of the thermal insulation composite coating of the embodiment is 0.040W/(m.k) at room temperature.
Example 3
The multilayer coating with heat preservation and heat insulation comprises a base coating, a middle coating and a finish coating from inside to outside, wherein the middle coating comprises the following components in parts by weight: 30 parts of sodium silicate with the modulus of 3.2, 30 parts of expanded perlite, 30 parts of vitrified micro bubbles, 25 parts of asbestos wool, 15 parts of vermiculite, 25 parts of sepiolite powder and 6 parts of aluminium dihydrogen tripolyphosphate;
the finish paint comprises the following components in parts by weight: 20 parts of deionized water, 3 parts of propylene glycol, 1 part of multifunctional additive, 0.5 part of X-405 wetting agent, 2 parts of dispersing agent, 1 part of defoaming agent formed by mixing inorganic silicon modified mineral oil, polyoxypropylene glycerol ether and modified siloxane, 15 parts of heat insulating powder, 25 parts of titanium dioxide, 1 part of preservative, 50 parts of pure acrylic emulsion, 3 parts of 2-amino-2-methyl-1-propanol and 2 parts of modified alkali solution thickener.
The thermal conductivity coefficient of the thermal insulation composite coating of the embodiment is 0.035W/(m.k) at room temperature.
The preparation process of the multilayer coating with heat preservation and heat insulation comprises the following preparation processes:
1. preparing a closed base coating, namely taking 20 parts of deionized water, 10 parts of natural rubber emulsion, 1 part of film-forming aid, 0.5 part of anti-freezing agent, 0.1 part of bactericide, 0.1 part of thickening agent and 15 parts of pigment according to parts by weight, and putting the materials into a stirrer to disperse for 20 minutes at the speed of 1000 revolutions per minute to obtain the closed primer coating.
2. Preparation of middle layer coating
a. Respectively putting the expanded perlite, the vitrified micro bubbles, the sepiolite powder and the vermiculite into a grinding machine for grinding, and taking the expanded perlite of 80-100 meshes, the sepiolite powder of 300 meshes and the vermiculite of 40-60 meshes for later use.
b. Placing the ground expanded perlite and the vermiculite in parts by weight into a dispersion tank, adding 2/3 water glass into the dispersion tank, mixing and stirring at the speed of 100 revolutions per minute for 20 minutes, and adding asbestos wool in the stirring process until the mixture is not sticky;
c. respectively adding aluminum dihydrogen tripolyphosphate and the ground sepiolite powder into the viscous mixture, and continuously stirring for 30 minutes;
d. adding 80-100 mesh vitrified micro bubbles and the rest water glass into the mixture, and dispersing and stirring for 15 minutes at the rotating speed of 100 revolutions per minute to obtain the middle layer coating.
3. Preparation of topcoat coating
a. Taking deionized water, propylene glycol, a multifunctional additive, an X-405 wetting agent, a dispersing agent, a defoaming agent and heat insulation powder according to parts by weight, and placing the materials into a dispersion machine to disperse for 15 minutes at a rotating speed of 1500 rpm;
b. transferring the uniformly mixed mixture into a grinding machine to grind until the particle diameter is less than 40 nanometers; adding titanium dioxide and a preservative into the mixture according to the parts by weight, and uniformly stirring;
c. adding the pure acrylic emulsion, the film forming additive and the thickening agent according to the parts by weight, mixing and stirring to obtain the finish paint.
The construction process of the multilayer coating with heat preservation and heat insulation provided by the invention specifically comprises the following steps:
1. coating a primer coating: cleaning the base surface to be coated, leveling to ensure that the surface has no floating dust, oil stain or defect, and brushing primer to seal the alkaline substance in the wall and to serve as a coating substrate to enhance the bonding strength of the middle layer coating and the wall.
2. Coating a middle layer coating: when the environmental temperature is higher than 0 ℃, after the primer is dried, the middle layer coating is uniformly coated on the primer in a spraying, scraping and smearing mode, the coating thickness of the middle layer coating is ensured to be 5-8mm, and the surface of the middle layer coating is polished to be flat after the middle layer coating is dried into a film; when the environmental temperature is lower than 0 ℃, coating 2-5mm of middle layer coating on the surface of the primer, then fixing the flame-retardant mesh cloth on the middle layer coating, and spraying 4-6mm of second layer of middle layer coating on the mesh cloth after the mesh cloth is firmly fixed.
3. Coating a finish paint: and after the middle layer coating is dried to form a film, polishing the surface of the middle layer coating to be flat, and then spraying finish paint on the surface of the middle layer coating.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (4)

1. A heat-insulating multilayer coating comprises a base coating, a middle coating and a finish coating from inside to outside, and is characterized in that:
the base layer coating comprises 20 parts of deionized water, 10 parts of natural rubber emulsion, 1 part of film-forming additive, 0.5 part of antifreezing agent, 0.1 part of bactericide, 0.1 part of thickening agent and 15 parts of pigment agent;
the middle layer coating comprises the following components in parts by weight: 30 parts of sodium silicate with the modulus of 3.2, 30 parts of expanded perlite, 30 parts of vitrified micro bubbles, 25 parts of asbestos wool, 15 parts of vermiculite, 25 parts of sepiolite powder and 6 parts of aluminium dihydrogen tripolyphosphate;
the finish paint comprises the following components in parts by weight: 20 parts of deionized water, 3 parts of propylene glycol, 1 part of multifunctional additive, 0.5 part of X-405 wetting agent, 2 parts of dispersing agent, 1 part of defoaming agent formed by mixing inorganic silicon modified mineral oil, polyoxypropylene glycerol ether and modified siloxane, 15 parts of heat insulating powder, 25 parts of titanium dioxide, 1 part of preservative, 50 parts of pure acrylic emulsion, 3 parts of 2-amino-2-methyl-1-propanol and 2 parts of modified alkali solution thickener.
2. A method for preparing a multi-layer coating with heat preservation and insulation functions as claimed in claim 1, wherein the base coating is prepared by the following method:
taking 20 parts by weight of deionized water, 10 parts by weight of natural rubber emulsion, 1 part by weight of film forming additive, 0.5 part by weight of antifreezing agent, 0.1 part by weight of bactericide, 0.1 part by weight of thickening agent and 15 parts by weight of pigment agent, and putting the mixture into a stirrer to disperse for 20 minutes at the speed of 1000 revolutions per minute to obtain the enclosed primer coating.
3. A method for preparing a multi-layer coating with heat preservation and insulation functions as claimed in claim 1, wherein the middle layer coating is prepared by the following method:
a. respectively putting the expanded perlite, the sepiolite powder and the vermiculite into a grinding machine for grinding, and taking the expanded perlite of 80-100 meshes, the sepiolite powder of 300 meshes and the vermiculite of 40-60 meshes for later use;
b. placing the ground expanded perlite and the vermiculite in parts by weight into a dispersion tank, adding 2/3 water glass into the dispersion tank, mixing and stirring at the speed of 100 revolutions per minute, and adding asbestos wool in the stirring process until the mixture is not sticky;
c. respectively adding aluminum dihydrogen tripolyphosphate and the ground sepiolite powder into the viscous mixture, and continuously stirring for 30 minutes;
d. adding 80-100 mesh vitrified micro bubbles and the rest water glass into the mixture, and dispersing and stirring for 15 minutes at the rotating speed of 100 revolutions per minute to obtain the middle layer coating.
4. A method for preparing the heat-insulating multilayer coating as claimed in claim 1, wherein the topcoat coating is prepared by the following method:
a. taking deionized water, propylene glycol, a multifunctional additive, an X-405 wetting agent, a dispersing agent, a defoaming agent and heat insulation powder according to parts by weight, and placing the materials into a dispersion machine to disperse for 15 minutes at a rotating speed of 1500 rpm;
b. transferring the uniformly mixed mixture into a grinding machine to grind until the particle diameter is less than 40 nanometers; adding titanium dioxide and a preservative into the mixture according to the parts by weight, and uniformly stirring;
c. adding the pure acrylic emulsion, the film forming additive and the thickening agent according to the parts by weight, mixing and stirring to obtain the finish paint.
CN201811332717.0A 2018-11-09 2018-11-09 Multilayer coating with heat preservation and heat insulation functions and preparation method thereof Expired - Fee Related CN109456626B (en)

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CN111592782A (en) * 2020-06-22 2020-08-28 三棵树涂料股份有限公司 Water-based middle layer coating with fireproof and heat-insulating functions

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1037165A (en) * 1988-04-26 1989-11-15 龚物华 High-temperature fireproofing insulation coating
KR101005045B1 (en) * 2010-07-21 2010-12-30 (주)디오 A stainresistant thermal barrier paint and a painting process using the same
CN104212275A (en) * 2014-08-22 2014-12-17 北京卫星制造厂 Waterborne thermal-insulation coating system for building with double-layer structure
CN104356820A (en) * 2014-10-21 2015-02-18 福建建工建材科技开发有限公司 Multi-color-system reflective insulation mold coating system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1037165A (en) * 1988-04-26 1989-11-15 龚物华 High-temperature fireproofing insulation coating
KR101005045B1 (en) * 2010-07-21 2010-12-30 (주)디오 A stainresistant thermal barrier paint and a painting process using the same
CN104212275A (en) * 2014-08-22 2014-12-17 北京卫星制造厂 Waterborne thermal-insulation coating system for building with double-layer structure
CN104356820A (en) * 2014-10-21 2015-02-18 福建建工建材科技开发有限公司 Multi-color-system reflective insulation mold coating system

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