CN107057479B - Water-based heat-insulating fireproof material and preparation method thereof - Google Patents
Water-based heat-insulating fireproof material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a water-based heat-insulating fireproof coating which comprises the following components in percentage by weight: 8-20% of nano silicon oxide composite material compounded by nano silicon oxide powder with controllable structure and nano silicon oxide cake material with ultrahigh specific surface area according to the ratio of 0.5: 1-5: 1, 3-15% of glass beads, 4-10% of nano titanium oxide, 1-8% of potassium hexatitanate, 1-8% of titanium pyrophosphate, 1-3% of aluminum hydroxide, 1-3% of zinc borate, 1-3% of barium borate, 1-3% of sodium calcium metasilicate, 1-10% of aluminum silicate, 20-28% of acrylic acid composite emulsion, 1.5-3% of other additives and the balance of water. The invention provides a water-based heat-insulating fireproof coating, which takes a nano silicon oxide composite material compounded by nano silicon oxide powder with a controllable structure and nano silicon oxide cakes with an ultrahigh specific surface area as a core material, and ensures that a product has a good function of heat stagnation flow transfer through optimization and improvement of components and corresponding proportion, the heat conductivity coefficient of the product is not higher than 0.03W/(m.K), and the fireproof performance reaches the level A.
Description
Technical Field
The invention belongs to the technical field of heat insulation materials, and particularly relates to a water-based heat insulation fireproof material and a preparation method thereof.
Background
With the development of society and the requirements of low carbon and environmental protection, energy conservation and consumption reduction are important problems in energy application and scientific research, and heat insulation materials are novel functional materials developed under the social background. Building energy consumption is one of the important components of human total energy consumption, and meanwhile, building energy consumption is also a main source of pollution. At present, the energy consumption of Chinese buildings accounts for about 30 percent of the total energy consumption of the whole society, and the proportion is gradually increased to about 40 percent according to the experience of developed countries. In addition, China is in the process of high-speed urbanization and industrialization, and a new building is as high as 20 hundred million square meters every year, which is equivalent to 40 percent of the new building every year all over the world; the energy consumption in heating is the largest, and reaches 60% of the energy consumption of buildings all over the world, so that the energy consumption of the buildings can be effectively reduced, the energy utilization efficiency is improved, and the national energy shortage condition is greatly relieved. The adoption of high-efficiency heat insulation materials for heat insulation of walls is one of the main energy-saving measures and is the most effective way.
The heat insulating material can be roughly classified into an organic heat insulating material and an inorganic heat insulating material according to the material. At present, the most widely applied heat insulation board in China is an organic heat insulation material, and at present, more than 80% of industries, buildings and other industries in China adopt rubber powder and extrusion-polycondensation styrene boards, rigid foam polyurethane boards and other organic heat insulation materials for heat insulation engineering. Although the organic heat-insulating material has the advantages of low heat conductivity coefficient, good heat-insulating property and the like, the greatest defects of the organic heat-insulating material are that the organic heat-insulating material is not fireproof; the material emits toxic substances in long-term use, and the ecological environment-friendly property is poor; the expansion coefficient of the organic heat-insulating material is greatly different from that of wall and surface anti-cracking mortar, and the heat-insulating layer is easy to crack under a large temperature difference. In addition, the organic heat insulation material also has the defects of poor aging resistance, poor stability, large construction difficulty, higher engineering cost, limited resources and difficult recycling. Compared with organic heat insulation materials, inorganic heat insulation materials such as rock wool, mineral wool, glass wool, foam concrete, vitrified micro bubbles and the like have the advantages of environmental protection and sustainability, the combustion performance of the inorganic heat insulation materials can reach A level, and the inorganic heat insulation materials are also widely applied to buildings. Particularly, with the rising of petroleum price and the increasing attention of people on green energy conservation, low carbon and environmental protection, the development of inorganic heat-insulating materials also drives into the express way. However, the inorganic heat-insulating material has poor heat conductivity and poor heat-insulating property, so that the inorganic heat-insulating material is difficult to achieve ideal heat-insulating and energy-saving effects and even fails when meeting water, and thus is difficult to popularize in application.
With the deep research on the heat-insulating and heat-preserving material technology and the development of the nanotechnology, the water-based nanometer heat-insulating and heat-preserving fireproof material appears in the prior art, and the material is prepared by taking nanometer powder as a raw material, compounding the nanometer powder with an inorganic heat-insulating and heat-preserving fireproof material, and matching with a film-forming and functional auxiliary agent. For example, patent CN104231917A discloses a nano high temperature resistant heat insulation coating prepared from silica aerogel, inorganic nano titanium oxide, nano alumina, glass hollow microspheres, flame retardant and functional assistant, which can effectively reduce heat transfer efficiency, but because of the particularity of the properties of silica material, not only the raw material is expensive, but also the properties are unstable and the heat insulation effect is not ideal.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides the water-based heat-insulating fireproof coating and the preparation method thereof, the structure-controllable nano silicon oxide powder and the nano silicon oxide cake material with the ultrahigh specific surface area form a composite material, the advantages of the nano silicon oxide powder and the nano silicon oxide cake material in the aspects of heat insulation and fireproof performance are utilized, the composite material is taken as a core material of the water-based heat-insulating fireproof coating, and the prepared water-based heat-insulating fireproof coating material product has excellent heat conductivity coefficient through improvement of corresponding components and proportion, and the fireproof performance reaches the level of A.
In order to achieve the above object, according to one aspect of the present invention, there is provided a water-based heat insulation fireproof coating, which comprises the following components by weight:
in the scheme, the nano silicon oxide composite material is a main material of the heat-insulating fireproof coating, the solid heat conductivity coefficient of the material is greatly reduced by high porosity and low apparent density, the nano silicon oxide composite material has ultrahigh specific surface area and ultrahigh surface activity, and endless and extremely small point contact is formed among particles, so that a passage for heat to be transferred in a solid framework can be increased, an infinite path effect is formed, and the heat conductivity of the solid framework is almost reduced to the minimum. In addition, the large amount of nanometer-scale closed pores in the material can lead air molecules to lose the free flow capacity, namely, the zero convection effect is generated, and meanwhile, infinite air-solid interfaces exist, so that a great number of reflecting interfaces exist in the material, and the efficiency of radiation heat conduction approaches zero. Moreover, a dense network structure formed by the composite material is used as a carrier of a temperature control phase change material and an infrared reflection material, and the functions of temperature regulation and heat resistance can be realized.
As a further optimization of the invention, the nano silicon oxide composite material is a material formed by mixing nano silicon oxide powder with a controllable structure and nano silicon oxide cake materials with an ultrahigh specific surface area, and is preferably formed by mixing the nano silicon oxide powder and the nano silicon oxide cake materials according to the weight percentage of 0.5: 1-5: 1.
In the scheme, the nanometer silicon oxide cake with the ultrahigh specific surface area is not dried, has stronger surface activity, can form a stronger network structure system inside and outside particles, and can solve the problem of insufficient rigidity of the material and improve the strength of the coating by doping the nanometer silicon oxide cake with the ultrahigh specific surface area into the composite material; meanwhile, the nano silicon oxide powder with the controllable structure is nano silicon oxide which is subjected to a drying procedure, a large amount of ultramicro closed pore spaces exist in the nano silicon oxide powder, the convection diffusion of heat energy can be retarded, the heat conductivity coefficient of the material is reduced, the nano silicon oxide powder can be used as a carrier of a temperature control phase change material, and the nano amorphous structure enables the heat insulation material to form a short-range disordered interface structure characteristic, has a heat self-consumption function, and enables the heat insulation coating to retard heat flow transfer, isolate heat transfer and keep the temperature stable effect. The ultrahigh specific surface area nano silicon oxide cake with high rigidity and the nano silicon oxide powder with the open pore structure are compounded, and the ultrahigh specific surface area nano silicon oxide cake and the nano silicon oxide powder are matched and combined with each other, so that the overall strength of the material is good, the surface activity of the material can be effectively improved, and the fireproof performance of the material is greatly improved. Particularly, the proportion and the amount of the composite materials are designed to be (0.5-5):1, and the strength and the heat conductivity of the mixed materials can reach the optimal, so that the heat-insulating fireproof coating with uniform toughness, rigidity, heat insulation and heat preservation functions is obtained.
As a further preferred mode of the invention, the nano-silica powder with controllable structure is amorphous powder, and the specific surface area of the nano-silica powder is not less than 700m2A porosity of not less than 70 percent and a micropore aperture<2nm, and the specific volume of the micropores is more than or equal to 1000cm3A particle diameter of 10 to 40 nm.
As a further preferable mode of the invention, the specific surface area of the ultrahigh specific surface area nano silicon oxide cake is not less than 1160m2A porosity of not less than 80 percent and a micropore aperture<0.6nm, micropore specific volume of more than or equal to 1980cm3A particle diameter of 5 to 10 nm.
According to the scheme, unsaturated residual bonds and hydroxyl groups in different bonding states exist on the surface of the nano silicon oxide, so that the nano silicon oxide powder and the nano silicon oxide cake material with the ultrahigh specific surface area are in an oxygen-deficient structure, certain reducibility is embodied in performance, and the material can reduce oxygen molecules in the air into an ionic state, so that the fireproof performance of the material is improved.
In a further preferred embodiment of the present invention, the potassium hexatitanate and the titanium pyrophosphate have a particle size of 2 to 150 μm as the temperature control material. The potassium hexatitanate and the titanium pyrophosphate are excellent phase change materials, the infrared refractive index is more than 2.5 times of that of titanium oxide, the self thermal conductivity coefficient is low, the phase change heat storage material and the porous nano material are compounded, the temperature regulation function of the phase change material is integrated in the heat insulation material, and the high heat resistance and long-acting intelligent temperature regulation and control of the heat insulation material can be realized.
In a further preferred embodiment of the present invention, the nano titanium oxide is rutile type nano titanium oxide, and the particle size is 20 to 30 nm. The rutile type nano titanium oxide has high refractive index and is an excellent infrared reflection material.
In a further preferred embodiment of the present invention, the aluminum hydroxide has a particle diameter of 1 to 2.5 μm. The aluminum hydroxide is a good inorganic flame retardant, when the temperature rises, the aluminum hydroxide loses water, absorbs heat and cools, so that high polymers cannot be fully combusted, a carbonized protective film is formed on the surface, oxygen is prevented from entering, combustible gas is prevented from escaping, and the flame retardant effect of the coating is ensured.
In a further preferred embodiment of the present invention, the zinc borate and the barium borate are used together as a boron flame retardant, and the particle size thereof is 3 to 30 μm. The zinc borate, the barium borate and the aluminum hydroxide flame retardant cooperate to generate a porous hard glass ceramic-like substance, which plays roles of heat insulation and adsorption of combustible and combustion-supporting gas and prevents further combustion. The three components are optimally matched to have excellent flame retardant effect.
As a further preferred aspect of the present invention, the sodium calcium metasilicate is a powder having a mesh size of more than 400. The sodium calcium metasilicate has higher high temperature resistance, and can improve the high temperature resistance and the fire resistance of the water-based heat-insulating fireproof coating.
As a further preferred aspect of the present invention, the aluminum silicate has a diameter of 0.5 to 2 μm. Due to the addition of the aluminum silicate, a plurality of new energy absorption mechanisms are added, the energy consumed in the fracture process is increased, and the coating is prevented from cracking; the aluminum silicate fiber has better infrared absorption and scattering capacity, can effectively reduce the radiation heat transfer of the material at high temperature, and reduces the heat conductivity coefficient of the coating. Meanwhile, the aluminum silicate has excellent high-temperature resistance, so that the heat resistance of the heat-insulating fireproof material is improved.
As a further preferred of the present invention, the film forming agent is an acrylic composite emulsion. Preferably, the acrylic acid composite emulsion is composed of at least two of styrene-acrylic, pure acrylic and silicone-acrylic. The acrylic acid composite emulsion is a main film forming agent of the heat-insulation and heat-preservation fireproof coating, and can ensure the elasticity, strength and weather resistance of the coating, thereby improving the crack resistance, stain resistance, water resistance and weather resistance of the heat-insulation and heat-preservation fireproof coating and prolonging the service life of the coating.
As a further preferable aspect of the present invention, the glass beads are 10 to 20 μm. The glass hollow microspheres are closed hollow spheres, have vacuum inside and have the characteristics of sound insulation, heat insulation and insulation. Its sphericity provides better flowability than flaky, acicular or irregularly shaped filler particles, making it have a good dispersion effect on impact force and stress. The additive can well improve the external force impact resistance and the wear resistance of a coating film when added into the coating, improve the shearing strength and the bending strength of the coating, enable the coating to have isotropy, reduce stress concentration and reduce stress cracking of the coating caused by expansion with heat and contraction with cold.
As a further preferred aspect of the present invention, the functional auxiliary is at least one of a dispersant, a wetting agent, an antifoaming agent, a bactericide, a leveling agent, a pH adjuster, and a thickener.
As a further preferred aspect of the present invention, the specific type and content of the functional assistant may be, by weight: 0.3-1% of dispersing agent, 0.3-1% of wetting agent, 0.3-1% of film-forming assistant, 0.1-0.2% of bactericide, 0.1-0.5% of pH regulator, 0.05-0.1% of flatting agent, 0.05-0.1% of defoaming agent and 0.2-0.5% of thickening agent.
According to another aspect of the invention, a preparation method of the water-based heat-insulating fireproof coating is provided, which specifically comprises the following steps:
(1) firstly, adding a dispersing agent and a wetting agent into a beating barrel containing a certain amount of water, then sequentially adding 1-8% of potassium hexatitanate, 1-8% of titanium pyrophosphate, 1-3% of sodium calcium metasilicate, 4-10% of nano titanium oxide and 1-3% of aluminum hydroxide, and beating;
(2) adding 8-20% of the nano silicon oxide composite material, and pulping;
(3) adding 1-10% of aluminum silicate for pulping;
(4) sucking 20-28% of the acrylic acid composite emulsion into a reaction kettle, sucking the slurry for later use in a beating barrel into the reaction kettle, and stirring for 40-60 min;
(5) 3-15% of glass beads are added and pulped;
(6) adding the functional additive and stirring uniformly to prepare the heat-insulating fireproof coating.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
(1) the water-based heat-insulating fireproof coating takes a nano silicon oxide material compounded by nano silicon oxide with a controllable structure and a nano silicon oxide cake material with an ultrahigh specific surface area as a main material, can realize a good heat-insulating effect, has a heat conductivity coefficient not higher than 0.03W/(m.K), and specifically comprises ① reducing the heat conduction efficiency of the coating by utilizing the high porosity, low apparent density and long-path effect of the nano silicon oxide composite material, ② realizing the zero convection heat effect of the material by utilizing an ultramicro closed pore negative space in the nano silicon oxide composite material, ③ reducing the radiation heat conduction efficiency of the heat-insulating fireproof coating by utilizing the infinite heat-shielding plate effect of the nano silicon oxide composite material and realizing the heat self-consumption function of the material, wherein a porous compact network structure formed by the material ④ is used as a carrier of a phase-change material, thereby realizing the automatic temperature regulation function of the material.
(2) The water-based heat-insulating fireproof coating has a reduced heat conductivity coefficient and a strong infrared shielding function, can effectively inhibit heat radiation and heat loss of high-rise buildings, and has a remarkable energy-saving and heat-insulating effect.
(3) The water-based heat-insulating fireproof coating disclosed by the invention essentially improves the fireproof performance of the material by introducing the non-combustible, flame-retardant and flame-retardant material, the fireproof performance reaches the level A, the material cannot burn under a high-temperature condition, no smoke is generated, no toxic gas is discharged, and the water-based heat-insulating fireproof coating belongs to an environment-friendly energy-saving coating.
(4) The water-based heat-insulating fireproof coating has the characteristics of convenient construction, thin coating, no seam, compact surface of the heat-insulating coating and adhesive force.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
In the embodiment, the water-based heat-insulating fireproof coating comprises the following components in percentage by weight:
the nano silicon oxide composite material is formed by mixing nano silicon oxide powder with a controllable structure and nano silicon oxide cake materials with an ultrahigh specific surface area according to the weight percentage of 1: 1. Wherein the nano silicon oxide powder with controllable structure is amorphous powder, and the specific surface area is not less than 700m2A porosity of not less than 70 percent and a micropore aperture<2nm, specific pore volume≥1000cm3The grain diameter is 10-40 nm. The specific surface area of the ultrahigh specific surface area nano silicon oxide cake is not less than 1160m2A porosity of not less than 80 percent and a micropore aperture<0.6nm, micropore specific volume of more than or equal to 1980cm3A particle diameter of 5 to 10 nm.
In this embodiment, the functional additive preferably includes 0.5% of a dispersant, 0.5% of a wetting agent, 0.3% of a film-forming additive, 0.1% of a bactericide, 0.1% of a pH adjuster, 0.05% of a leveling agent, 0.05% of a defoaming agent, and 0.4% of a thickener.
Firstly, adding water into a pulping barrel according to the weight, then adding 0.5% of dispersing agent and 0.5% of wetting agent, sequentially adding 1% of potassium hexatitanate, 5% of titanium pyrophosphate, 1% of sodium calcium metasilicate, 6% of nano titanium oxide, 2% of aluminum hydroxide, 3% of zinc borate, 2% of barium borate, 1000-; then 40 percent of nano silicon oxide composite material is put into the mixture and is beaten for 20 to 30 minutes at 3000 revolutions per minute; then 6 percent of aluminum silicate is put into the mixture, and 900 and 1100 revolutions per minute are used for pulping for 20 to 30 minutes, and the pulp is reserved. Sucking 28% of the acrylic composite emulsion into a reaction kettle by using a vacuum pump, starting the reaction kettle, adjusting the stirring speed to 400-500 rpm, sucking the slurry reserved in the slurry mixing barrel into the reaction kettle, and stirring for 40-60 minutes; then 10 percent of glass beads are put into the mixture and are beaten for 15 to 30 minutes at 600 plus 800 rpm; then sequentially adding 0.3 percent of film forming auxiliary agent, 0.1 percent of bactericide, 0.1 percent of pH regulator, 0.05 percent of flatting agent and 0.05 percent of defoaming agent, fully and uniformly stirring, slowly adding 0.4 percent of thickening agent until the viscosity of the coating reaches 80-90 seconds in 4 cups. Finally, filling to prepare the heat-insulating fireproof coating for the wall.
The product of the water-based heat-insulating and heat-preserving fireproof material prepared by the embodiment has low heat conductivity coefficient which is not higher than 0.03W/(m.K), and the fireproof performance reaches the level A.
Example 2
In the embodiment, the water-based heat-insulating fireproof coating comprises the following components in percentage by weight:
the nano silicon oxide composite material is formed by mixing nano silicon oxide powder with a controllable structure and nano silicon oxide cake materials with an ultrahigh specific surface area according to the weight percentage of 2: 1. Wherein the nano silicon oxide powder with controllable structure is amorphous powder, and the specific surface area is not less than 700m2A porosity of not less than 70 percent and a micropore aperture<2nm, and the specific volume of the micropores is more than or equal to 1000cm3The grain diameter is 10-40 nm. The specific surface area of the ultrahigh specific surface area nano silicon oxide cake is not less than 1160m2A porosity of not less than 80 percent and a micropore aperture<0.6nm, micropore specific volume of more than or equal to 1980cm3The grain diameter is 5-10 nm.
In this embodiment, the functional additive preferably includes 0.5% of a dispersant, 0.5% of a wetting agent, 0.3% of a film-forming additive, 0.1% of a bactericide, 0.1% of a pH adjuster, 0.05% of a leveling agent, 0.05% of a defoaming agent, and 0.4% of a thickener.
Firstly, adding water into a pulping barrel according to the weight, then adding 0.5% of dispersing agent and 0.5% of wetting agent, sequentially adding 6% of potassium hexatitanate, 1% of titanium pyrophosphate, 3% of sodium calcium metasilicate, 10% of nano titanium oxide, 1% of aluminum hydroxide, 2% of zinc borate, 1% of barium borate, 1000-; then putting the nano silicon oxide composite material into the reactor for 12 percent, and pulping for 20-30 minutes at 1000-2800 r/min; then adding 3% of glass beads, and pulping for 15-30 minutes at 600-; then 10 percent of aluminum silicate is put into the mixture, and 900 and 1100 revolutions per minute are used for pulping for 20 to 30 minutes, and the slurry is reserved. Sucking 25% of the acrylic composite emulsion into a reaction kettle by using a vacuum pump, starting the reaction kettle, and adjusting the stirring speed to 400-600 rpm; sucking the slurry in the slurry mixing barrel into the reaction kettle, and stirring for 40-60 minutes; then adding 3% of glass beads, and pulping for 15-30 minutes at 600-; then sequentially adding 0.3 percent of film forming auxiliary agent, 0.1 percent of bactericide, 0.1 percent of pH regulator, 0.05 percent of flatting agent and 0.05 percent of defoaming agent, fully and uniformly stirring, slowly adding 0.4 percent of thickening agent until the viscosity of the coating reaches 80-90 seconds in 4 cups. Finally, the water-based heat-insulating fireproof coating for the wall is prepared by filling.
The product of the water-based heat-insulating and heat-preserving fireproof material prepared by the embodiment has low heat conductivity coefficient which is not higher than 0.03W/(m.K), and the fireproof performance reaches the level A.
Example 3
In the embodiment, the water-based heat-insulating fireproof coating comprises the following components in percentage by weight:
the nano silicon oxide composite material is formed by mixing nano silicon oxide powder with a controllable structure and nano silicon oxide cake materials with an ultrahigh specific surface area according to a weight ratio of 3: 1. Wherein the nano silicon oxide powder with controllable structure is amorphous powder, and the specific surface area is not less than 700m2A porosity of not less than 70 percent and a micropore aperture<2nm, and the specific volume of the micropores is more than or equal to 1000cm3The grain diameter is 10-40 nm. The specific surface area of the ultrahigh specific surface area nano silicon oxide cake is not less than 1160m2A porosity of not less than 80 percent and a micropore aperture<0.6nm, micropore specific volume of more than or equal to 1980cm3The grain diameter is 5-10 nm.
In this embodiment, the functional additive preferably includes 1.5% of a dispersant, 1.5% of a wetting agent, 0.3% of a film-forming additive, 0.1% of a bactericide, 0.1% of a pH adjuster, 0.05% of a leveling agent, 0.05% of a defoaming agent, and 0.4% of a thickener.
Firstly, adding water into a pulping barrel according to the weight, then adding 1.5% of dispersing agent and 1.5% of wetting agent, sequentially adding 8% of potassium hexatitanate, 2% of sodium calcium metasilicate, 6% of nano titanium oxide, 3% of aluminum hydroxide, 2% of zinc borate, 2% of barium borate, and pulping for 25-60 minutes by using a 1000-rotation/minute high-speed homogenizer (or a sand mill); then putting the nano silicon oxide composite material into the reactor for 12 percent, and pulping for 20-30 minutes at 1000-2800 r/min; then 6 percent of aluminum silicate is put into the mixture, and 900 and 1100 revolutions per minute are used for pulping for 20 to 30 minutes, and the pulp is reserved. Sucking 20% of the acrylic composite emulsion into a reaction kettle by using a vacuum pump, starting the reaction kettle, and adjusting the stirring speed to 400-600 rpm; sucking the slurry in the slurry mixing barrel into the reaction kettle, and stirring for 40-60 minutes; then adding 15% of glass beads, and pulping for 15-30 minutes at 600-800 rpm; then sequentially adding 0.3 percent of film forming auxiliary agent, 0.1 percent of bactericide, 0.1 percent of pH regulator, 0.05 percent of flatting agent and 0.05 percent of defoaming agent, fully and uniformly stirring, slowly adding 0.4 percent of thickening agent until the viscosity of the coating reaches 80-90 seconds in 4 cups. Finally, the water-based heat-insulating fireproof coating for the wall is prepared by filling.
The product of the water-based heat-insulating and heat-preserving fireproof material prepared by the embodiment has low heat conductivity coefficient which is not higher than 0.03W/(m.K), and the fireproof performance reaches the level A.
Example 4
In the embodiment, the water-based heat-insulating fireproof coating comprises the following components in percentage by weight:
the nano silicon oxide composite material is a material formed by mixing nano silicon oxide powder with a controllable structure and nano silicon oxide cake materials with an ultrahigh specific surface area according to a weight ratio of 4: 1. Wherein the nano silicon oxide powder with controllable structure is amorphous powder, and the specific surface area is not less than 700m2A porosity of not less than 70 percent and a micropore aperture<2nm, and the specific volume of the micropores is more than or equal to 1000cm3The grain diameter is 10-40 nm. The specific surface area of the ultrahigh specific surface area nano silicon oxide cake is not less than 1160m2A porosity of not less than 80 percent and a micropore aperture<0.6nm, micropore specific volume of more than or equal to 1980cm3The grain diameter is 5-10 nm.
In this embodiment, the functional additive preferably includes 0.45% of a dispersant, 0.5% of a wetting agent, 0.3% of a film-forming additive, 0.1% of a bactericide, 0.1% of a pH adjuster, 0.05% of a leveling agent, 0.05% of a defoaming agent, and 0.4% of a thickener.
When the preparation method is used, firstly, water is added into a pulping barrel according to the weight, then 0.45% of dispersing agent and 0.5% of wetting agent are added, 8% of titanium pyrophosphate, 2% of sodium calcium metasilicate, 4% of nano titanium oxide, 2% of aluminum hydroxide, 1% of zinc borate, 3% of barium borate and 1000-2800 r/min high-speed homogenizer (or sand mill) are sequentially added for pulping for 25-60 min; then 20 percent of the nano silicon oxide composite material is put into the reactor and beaten for 20 to 30 minutes at the speed of 1000 and 2800 revolutions per minute; then 1 percent of aluminum silicate is added, and the slurry is pulped for 20 to 30 minutes at 900-1100 r/min for standby. Sucking 25% of the acrylic composite emulsion into a reaction kettle by using a vacuum pump, starting the reaction kettle, and adjusting the stirring speed to 400-600 rpm; sucking the slurry in the slurry mixing barrel into the reaction kettle, and stirring for 40-60 minutes; then 10 percent of glass beads are put into the mixture and are beaten for 15 to 30 minutes at 600 plus 800 rpm; then sequentially adding 0.3 percent of film forming auxiliary agent, 0.1 percent of bactericide, 0.1 percent of pH regulator, 0.05 percent of flatting agent and 0.05 percent of defoaming agent, fully and uniformly stirring, slowly adding 0.4 percent of thickening agent until the viscosity of the coating reaches 80-90 seconds in 4 cups. Finally, the water-based heat-insulating fireproof coating for the wall is prepared by filling.
The product of the water-based heat-insulating and heat-preserving fireproof material prepared by the embodiment has low heat conductivity coefficient which is not higher than 0.03W/(m.K), and the fireproof performance reaches the level A.
In the above embodiments, the specific contents of the components and the numerical ranges of the related parameters are only exemplary and are not intended to limit the present invention. Particularly, the ratio of the nano-silica powder with controllable structure to the nano-silica cake with ultra-high specific surface area is not limited to the specific values of the above embodiments, and can be selected in the range of (0.5-5):1, and more preferably (1-4): 1.
In addition, the content of the glass beads is not limited to the values in the above embodiments, and the actual value range thereof may be 3 to 15%. The content of the nano titanium oxide is not limited to the values in the above embodiments, and the actual value range thereof may be 4 to 10%.
Claims (8)
1. The water-based heat-insulating fireproof coating comprises the following components in percentage by weight:
8-20% of nano silicon oxide composite material
3 to 15 percent of glass beads
4 to 10 percent of nano titanium oxide
1 to 8 percent of potassium hexatitanate
1 to 8 percent of titanium pyrophosphate
1 to 3 percent of aluminum hydroxide
1-3% of zinc borate
1-3% of barium borate
1-3% of sodium calcium silicate
1 to 10 percent of aluminum silicate
20-28% of film forming agent
1.5-3% of functional auxiliary agent
The balance of water;
the nano silicon oxide composite material is prepared by mixing nano silicon oxide powder and nano silicon oxide cake materials with ultrahigh specific surface area according to the weight percentage (0.5-5) to 1; the specific surface area of the ultrahigh specific surface area nano silicon oxide cake material is not less than 1160m2A porosity of not less than 80 percent and a micropore aperture<0.6nm, micropore specific volume of more than or equal to 1980cm3The grain diameter is 5-10 nm.
2. The water-based heat-insulating fireproof coating as claimed in claim 1, wherein the nano silicon oxide powder is amorphous powder, and the specific surface area of the nano silicon oxide powder is not less than 700m2A porosity of not less than 70 percent and a micropore aperture<2nm, and the specific volume of the micropores is more than or equal to 1000cm3The grain diameter is 10-40 nm.
3. The aqueous heat-insulating fireproof coating according to claim 1 or 2, wherein the potassium hexatitanate and the titanium pyrophosphate are used as temperature control materials and have a particle size of 2-150 μm.
4. The water-based heat-insulating fireproof coating as claimed in claim 1 or 2, wherein the nano titanium oxide is rutile nano titanium oxide, and the particle size is 20-30 nm.
5. The water-based heat-insulating fireproof coating as claimed in claim 1 or 2, wherein the sodium calcium silicate is powder with a size of more than 400 meshes.
6. The aqueous heat-insulating fireproof coating as claimed in claim 1 or 2, wherein the aluminum silicate has a diameter of 0.5-2 μm; the zinc borate and the barium borate are used as boron flame retardants, and the particle size of the zinc borate and the barium borate is 3-30 mu m.
7. The water-based heat-insulating fireproof coating as claimed in claim 1 or 2, wherein the functional auxiliary agent is a film-forming auxiliary agent, a dispersing agent, a wetting agent, a defoaming agent, a bactericide, a leveling agent, a pH regulator and a thickening agent.
8. The preparation method of the water-based heat-insulating fireproof coating of any one of claims 1 to 7, comprising the following steps:
(1) firstly, adding a dispersing agent and a wetting agent into a pulping barrel containing quantitative water, sequentially adding 1-8% of potassium hexatitanate, 1-8% of titanium pyrophosphate, 1-3% of calcium sodium silicate, 4-10% of nano titanium oxide, 1-3% of aluminum hydroxide, 1-3% of zinc borate and 1-3% of barium borate, and pulping;
(2) adding 8-20% of the nano silicon oxide composite material, and pulping;
(3) adding 1-10% of aluminum silicate for pulping;
(4) sucking 20-28% of the acrylic acid composite emulsion into a reaction kettle, sucking the slurry in a beating barrel into the reaction kettle, and stirring for 40-60 min;
(5) 3-15% of glass beads are added and pulped;
(6) adding the film forming assistant, the bactericide, the pH regulator, the flatting agent and the defoaming agent, uniformly stirring, and adding the thickening agent to prepare the heat-insulating fireproof coating.
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| JP2021526971A (en) * | 2018-06-15 | 2021-10-11 | ダブリュー・アール・グレース・アンド・カンパニー−コーンＷ Ｒ Ｇｒａｃｅ ＆ Ｃｏ−Ｃｏｎｎ | Defoaming agent Active substance, its manufacturing method, and defoaming compound |
| US20220403178A1 (en) * | 2019-08-28 | 2022-12-22 | Fujimi Incorporated | Method for increasing specific surface area of titanium phosphate plate-shaped particles, and powder containing plate-shaped particles derived from titanium phosphate |
| US20230272229A1 (en) * | 2020-06-19 | 2023-08-31 | Zeroignition Technologies Inc. | Thermally insulating and fire retardant non-intumescent coating and methods for making same |
| CN111662585A (en) * | 2020-06-24 | 2020-09-15 | 谭亮 | Fireproof coating with heat insulation and preservation performance |
| WO2023120295A1 (en) * | 2021-12-23 | 2023-06-29 | 大塚化学株式会社 | Aqueous coating composition, method for producing coating film, method for using aqueous coating composition, and coated article |
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| CN101973750B (en) * | 2010-10-21 | 2013-09-11 | 童金荣 | Inorganic heat-insulating material and preparation method thereof |
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