CN112680003A - Inorganic heat-insulating coating and preparation method thereof - Google Patents
Inorganic heat-insulating coating and preparation method thereof Download PDFInfo
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Abstract
The invention relates to an inorganic heat-insulating coating with green, environment-friendly and efficient heat-insulating properties and a preparation method thereof. The formula of the coating comprises the following components in parts by weight: 10-25% of sodium silicate; 5-20% of silica sol; 3-10% of organoalkoxysilane; 0.5-20% of lower alcohol; 0.1-0.5% of a pH regulator; 10-20% of rutile titanium dioxide; hollow microspheres, inorganic pigment and filler, and 0.5-3.0% of graphene; film forming assistant, rheological assistant, antifreezing agent, dispersant, wetting agent, defoaming agent, adhesion promoter, preservative and deionized water. The raw material components and the using amount of the coating are optimized, the adding sequence of the raw materials of the coating is optimized, the toughness and the water resistance of the coating are improved by utilizing the organic alkoxy silane on the premise of not adding any high-molecular organic emulsion, the integral quality of the coating is ensured, and the advantages of high reflectivity, high radiance and the like of the coating are realized.
Description
Technical Field
The invention relates to an inorganic coating and a preparation method thereof, in particular to an inorganic heat-insulating coating and a preparation method thereof, belongs to the technical field of functional coatings, and is particularly suitable for heat preservation and heat insulation in the field of buildings.
Background
With the continuous improvement of the energy-saving requirement of buildings, the external wall heat preservation is gradually promoted in the building market. However, in recent years, fire accidents frequently occur in building buildings, and great threat is brought to life safety and property safety of residents. As a building coat, architectural coatings affect the thermal insulation and fire safety properties of a building. The building coatings can be divided into two main categories of organic coatings and inorganic coatings according to chemical components. The inorganic coating is a coating which is prepared by taking inorganic compounds such as silicate, silica sol or inorganic phosphate and the like as main film forming base materials and adding pigments, fillers, auxiliary agents, inorganic curing agents and the like which are not more than 5 percent of the total amount of the coating. Compared with organic coatings using organic polymers as film forming base materials, the inorganic coatings are more superior in fire resistance, flame retardance, heat resistance, surface hardness, aging resistance, lowest film forming temperature and the like, mainly use water as a dispersion medium, have no VOC (volatile organic compounds) harm problems such as free monomers and the like, and can not release harmful substances to the atmosphere under flame or high temperature, so that the pollution of solvents in the coating industry to the environment is fundamentally solved, and the inorganic coatings are gradually developed in recent years.
The alkali metal silicate-based inorganic coating is one of the most promising architectural coatings at present, wherein SiO2 has high activity and is easy to bond powder particles in the coating, and a film forming mechanism is that a Si-O-Si three-dimensional net structure is formed. Therefore, the most outstanding advantages of the coating are irreversibility of film forming and good water resistance. However, the sodium silicate coating film has the fatal defects of weak adhesion and easy cracking. The organic coating has excellent bonding strength, glossiness, flexibility, pollution resistance and other properties, and has good decorative effect. Therefore, the combination technique of inorganic coating and organic coating has become a hot spot of current research.
Chinese patent CN105504903B discloses an inorganic coating and a preparation method thereof. The coating formula comprises a lithium silicate aqueous solution, a sodium silicate aqueous solution, a methyl silicic acid emulsion, zeolite powder, aluminum silicate fibers, silica aerogel, a filler and deionized water, and has the advantages of high fire-proof grade, good weather resistance, environmental protection, no toxicity, simple preparation process and low cost.
Chinese patent CN105731977B discloses a water-resistant inorganic coating and a preparation method thereof. According to the method, the hydrophobic modified cellulose, the silicone-acrylic emulsion, the potassium silicate, the film forming additive, the mineral powder, the additive and the water are reasonably compounded and used, and are added and mixed step by step to obtain the inorganic coating with good water resistance, good weather resistance and strong adhesive force.
Chinese patent CN102173648B discloses a water-based high-temperature-resistant antioxidant inorganic coating and a preparation method thereof. The coating formula comprises water-based inorganic alumina sol resin, organic synthetic emulsion, aluminum oxide, bauxite, kaolin, deionized water and a viscosity stabilizer, and has the advantages of high temperature resistance, universal application to steel and water-soluble coatings, rapid cooling, easy peeling, safety, environmental protection and convenient use.
Chinese patent CN103483884B discloses a high-performance water-based inorganic coating and a preparation method thereof. The raw materials of the coating comprise silica sol, polymer solution, pigment, filler, defoamer, film-forming assistant, thickener and water. According to the method, the proportion of the pigment, the filler, the defoaming agent and the film-forming additive is optimized while the organic polymer solution is introduced, and the water-based inorganic coating which is harmless to the environment, remarkable in strong adhesion, excellent in leveling property and glossiness and the like is obtained.
Chinese patent CN105802419B discloses an inorganic coating for the outer wall of tropical island reef building. The basic components of the coating comprise nano silicon dioxide dispersion liquid, silicone-acrylate emulsion, black tin dioxide powder, inorganic filler, film-forming assistant, coupling agent and deionized water. According to the invention, the silicone-acrylic emulsion and the nano silicon dioxide dispersion liquid are mixed, so that organic polymers are uniformly distributed in gaps of the inorganic coating, and when the coating is subjected to cold and hot alternation, the shrinkage of the coating is buffered, so that the coating has certain elasticity, and the formed coating has the characteristics of both inorganic and organic coatings, and the defects of the inorganic coating and the organic coating are overcome.
In the prior art, inorganic raw material silicate is generally used as a base material, a certain proportion of high molecular organic emulsion is added, and then fillers such as titanium dioxide, kaolin, talcum powder, nano titanium dioxide and the like and a coating film-forming auxiliary agent are added to prepare the water-based organic-inorganic hybrid coating. The high molecular organic emulsion is filled in gaps of a-Si-O-Si-network structure, can only realize the blending of physical states, is difficult to realize high toughness and weather resistance, is easy to generate gelation and emulsion breaking, and cannot reach a stable coating system. In addition, the use of organic emulsions causes environmental pollution and a decrease in the fire-retardant property of the coating. Therefore, it is necessary to develop an inorganic heat-insulating coating material which is green, environment-friendly and high in performance.
Disclosure of Invention
In order to solve the problems in the prior art, the invention relates to an inorganic heat insulation coating with green, environmental-friendly and efficient heat insulation performance and a preparation method thereof.
The invention discloses an inorganic heat insulation coating, which comprises the following components in parts by weight:
10-25% of sodium silicate;
5-20% of silica sol;
3-10% of organoalkoxysilane;
0.5-20% of lower alcohol;
0.1-0.5% of a pH regulator;
10-20% of rutile titanium dioxide;
1-10% of hollow microspheres;
3-8% of inorganic pigment and filler;
0.5-3.0% of graphene;
0.5-5.0% of film-forming auxiliary agent;
0.2-2.0% of rheological additive;
0.4-1.0% of an antifreezing agent;
0.1-0.5% of a dispersant;
0.2-0.5% of wetting agent;
0.1-0.5% of defoaming agent;
0.1-0.5% of adhesion promoter;
0.1-0.4% of preservative;
the balance being deionized water.
The general formula of the organoalkoxysilane is RnSi (OR ') 4-n, wherein n is more than OR equal to 1 and less than OR equal to 3, R is a C1-6 alkyl group, and R' is a C1-5 alkyl group OR a C1-4 acyl group.
3. The lower alcohol is one or more of methanol, ethanol and propanol which are mixed according to any proportion.
4. The pH regulator is formed by mixing one or more of hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, acetic acid and formic acid with the lower alcohol according to claim 3 in any proportion.
5. The particle size D50 of the rutile type titanium dioxide is less than or equal to 0.5 mu m; the inorganic pigment and filler is one or more of silicon carbide, potassium titanate, diatomite, mica powder, talcum powder, heavy calcium powder and glass fiber which are mixed according to any proportion, and the average grain diameter D50 is less than or equal to 20 mu m.
6. The film-forming additive is formed by mixing one or more of trimethylpentane diol, monoisobutyrate and alcohol ester 12 according to any proportion.
7. The rheological additive consists of a modified urea solution, polyacrylate and a polyurethane thickener.
8. The dispersant is sodium polycarboxylate.
9. The wetting agent is octyl phenol polyoxyethylene ether; the defoaming agent is polysiloxane polymer; the adhesion promoter is polyether modified polysiloxane solution; the antifreezing agent is propylene glycol.
10. The preparation method of the inorganic heat-insulating coating is characterized by comprising the following steps:
(1) preparing a sodium silicate-silica sol mixed solution: adding sodium silicate into silica sol, stirring for 10-30 min in a dispersion machine at the speed of 100-1500 r/min, and obtaining a sodium silicate-silica sol mixed solution after the sodium silicate-silica sol is uniformly dispersed;
(2) preparing an organic silicon prepolymer solution: adding organoalkoxysilane into deionized water, stirring for 10-30 min in a dispersion machine at a speed of 100-1500 r/min, adding a pH regulator and lower alcohol, and continuously stirring for 10-30 min to obtain an organic silicon prepolymer solution;
(3) preparing filler slurry: pouring deionized water, a film forming auxiliary agent, a dispersing agent, a wetting agent, a defoaming agent and a preservative into a stirring container, shearing and pre-dispersing the mixture by using a stirring paddle at the rotating speed of 10-200 r/min, adding rutile titanium dioxide, inorganic pigment and filler and graphene after uniformly stirring, rapidly dispersing the rutile titanium dioxide, the inorganic pigment and the graphene at the rotating speed of 300-1000 r/min for 20-60 min, reducing the rotating speed of the stirring paddle to 200-500 r/min, adding hollow microspheres, stirring for 5-20 min, and obtaining filler slurry when the fineness of the slurry is less than 40 mu m;
(4) preparing a coating: mixing the sodium silicate-silica sol mixed solution in the step (1) with the organic silicon prepolymer solution in the step (2), performing shearing pre-dispersion on the mixture for 5-15 min by using a stirring paddle, wherein the rotating speed is 300-1500 r/min, adding the filler slurry, the adhesion promoter and the anti-freezing agent in the step (3), stirring for no less than 30min at 200-500 r/min, adjusting the rotating speed of the stirring paddle to be no more than 150r/min when the fineness of the coating is less than 40 mu m, adding the rheological additive and the rest of deionized water, and stirring for 5-20 min to obtain the inorganic heat-insulating coating.
Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention designs an inorganic heat-insulating coating with green, environment-friendly and high-efficiency heat-insulating properties, the raw material components and the using amount of the coating are optimized, the adding sequence of the raw materials of the coating is optimized, the toughness and the water resistance of the coating are improved by utilizing the organic alkoxy silane on the premise of not adding any high-molecular organic emulsion, the integral quality of the coating is ensured, and the advantages of high reflectivity, high radiance and the like of the coating are realized.
(2) The organic and inorganic hybrid in the coating reaches the molecular level dispersion level by utilizing the sol-gel reaction, and the network structure of the coating is improved, so that the coating has the toughness and the aesthetic property of the organic coating, and also has the chemical resistance and the scrub resistance of the inorganic coating;
(3) the graphene with high radiation rate is added into the coating formula, so that heat energy absorbed by a coating film can be converted into light energy to be radiated, and compared with traditional radiation type functional fillers such as infrared ceramic powder and the like, the graphene can achieve a better radiation refrigeration effect, and meanwhile, the coating has a barrier type due to the retention of the layered structure of graphite, so that the capability of the coating for preventing corrosive ions from permeating into a coating/substrate interface can be greatly improved, the graphene has high mechanical strength and good chemical stability, can be connected with other pigments and fillers in the coating film into a whole, enhances the overall strength and the anti-cracking performance of the coating, and can effectively prevent the coating film from cracking under the actions of sunlight, rainwater, wind sand, cold and heat changes and the like;
(4) the coating has good fluidity, good uniformity and excellent anti-settling performance, the coefficient of thermal conductivity after coating and curing is low, tests show that the full-wave-band reflectivity of a coating film with the thickness of only 100 mu m is higher than 0.85, the full-wave-band emissivity is higher than 0.86, the heat insulation temperature difference of the coating reaches more than 20 ℃, the reflection heat insulation effect is obvious, the super heat insulation effect can maintain the indoor temperature of a building in a proper range of a human body, and the air conditioning cost is saved.
Detailed Description
Example 1
The inorganic heat insulation coating is characterized in that the formula proportion is shown in the following table 2 in parts by weight:
table 2 formulation of inorganic thermal barrier coating of example 1
Wherein the defoamer is TEGO Foamex 843 which is a high defoamer of Destussidy.
The preparation steps are as follows:
(1) preparing a sodium silicate-silica sol mixed solution: adding 100g of sodium silicate into 130g of silica sol, stirring for 15min in a dispersion machine at the speed of 500r/min, and obtaining a sodium silicate-silica sol mixed solution after the sodium silicate-silica sol is uniformly dispersed;
(2) preparing an organic silicon prepolymer solution: adding 70g of organoalkoxysilane into 87g of deionized water, stirring for 15min in a dispersion machine at the speed of 1000r/min, adding 4g of sulfuric acid/ethanol mixed solution and 80g of ethanol, and continuously stirring for 20min to obtain an organic silicon prepolymer solution;
(3) preparing filler slurry: pouring 90g of deionized water, 25g of film-forming assistant, 2g of dispersing agent, 4g of wetting agent, 4g of defoaming agent and 4g of preservative into a stirring container, shearing and pre-dispersing the deionized water by using a stirring paddle at the rotating speed of 180r/min, uniformly stirring, adding 180g of rutile titanium dioxide, 5g of silicon carbide, 10g of potassium titanate, 25g of mica powder and 25g of graphene, rapidly dispersing the rutile titanium dioxide, the silicon carbide, the potassium titanate, the mica powder and the graphene at the rotating speed of 500r/min for 30min, reducing the rotating speed of the stirring paddle to 400r/min, adding 80g of hollow glass microspheres, stirring for 20min, and obtaining filler slurry when the fineness of the slurry is less than 40 mu m;
(4) preparing a coating: mixing the sodium silicate-silica sol mixed solution in the step (1) with the organic silicon prepolymer solution in the step (2), shearing and pre-dispersing the mixture for 10min by using a stirring paddle at the rotating speed of 500r/min, adding the filler slurry in the step (3), 4g of adhesion promoter and 4g of antifreeze agent, stirring the mixture for 30min at the speed of 200r/min, adjusting the rotating speed of the stirring paddle to 100r/min when the fineness of the coating is less than 40 mu m, adding 1.5g of modified urea solution, 3g of polyacrylate, 2.5g of polyurethane thickener and 60g of deionized water, and stirring the mixture for 15min to obtain the inorganic heat-insulating coating.
Tests show that the coating has the fineness of 30 mu m and good stability, the all-band emissivity of the coating is 0.86, the all-band emissivity is 0.88, and the heat insulation temperature difference of the coating is 25.2 ℃.
Example 2
The inorganic heat insulation coating is characterized by comprising the following components in parts by weight in a formula shown in a table 3:
table 4 formulation of inorganic thermal barrier coating of example 2
Wherein the defoamer is TEGO Foamex 843 which is a high defoamer of Destussidy.
The preparation steps are as follows:
(1) preparing a sodium silicate-silica sol mixed solution: adding 150g of sodium silicate into 100g of silica sol, stirring for 15min in a dispersion machine at the speed of 500r/min, and obtaining a sodium silicate-silica sol mixed solution after the sodium silicate-silica sol is uniformly dispersed;
(2) preparing an organic silicon prepolymer solution: adding 60g of organoalkoxysilane into 61g of deionized water, stirring for 15min in a dispersion machine at the speed of 1000r/min, adding 2g of sulfuric acid/ethanol mixed solution, 40g of methanol and 40g of ethanol, and continuously stirring for 20min to obtain an organic silicon prepolymer solution;
(3) preparing filler slurry: pouring 80g of deionized water, 25g of film-forming assistant, 2g of dispersing agent, 4g of wetting agent, 4g of defoaming agent and 4g of preservative into a stirring container, shearing and pre-dispersing the deionized water by using a stirring paddle at the rotating speed of 180r/min, uniformly stirring, adding 180g of rutile titanium dioxide, 10g of diatomite, 10g of potassium titanate, 20g of heavy calcium powder and 25g of graphene, rapidly dispersing the rutile titanium dioxide, the diatomite, the potassium titanate, the heavy calcium powder and the graphene at the rotating speed of 500r/min for 30min, reducing the rotating speed of the stirring paddle to 400r/min, adding 80g of hollow ceramic microspheres, stirring for 20min, and obtaining filler slurry when the fineness of the slurry is less than 40 mu m;
(4) preparing a coating: mixing the sodium silicate-silica sol mixed solution in the step (1) with the organic silicon prepolymer solution in the step (2), shearing and pre-dispersing for 15min by using a stirring paddle at the rotating speed of 500r/min, adding the filler slurry in the step (3), 4g of adhesion promoter and 4g of antifreeze agent, stirring for 30min at the speed of 200r/min, adjusting the rotating speed of the stirring paddle to 100r/min when the fineness of the coating is less than 40 mu m, adding 1.5g of modified urea solution, 3g of polyacrylate, 2.5g of polyurethane thickener and 88g of deionized water, and stirring for 15min to obtain the inorganic heat-insulating coating.
Tests show that the coating has the fineness of 25 mu m and good stability, the all-band emissivity of the coating is 0.88, the all-band emissivity is 0.89, and the heat insulation temperature difference of the coating is 27.6 ℃.
Example 3
The inorganic heat insulation coating is characterized by comprising the following components in parts by weight in a formula shown in a table 5:
TABLE 5 formulation of inorganic thermal barrier coating of example 3
Wherein the defoamer is TEGO Foamex 843 which is a high defoamer of Destussidy.
The preparation steps are as follows:
(1) preparing a sodium silicate-silica sol mixed solution: adding 200g of sodium silicate into 100g of silica sol, stirring for 15min in a dispersion machine at the speed of 500r/min, and obtaining a sodium silicate-silica sol mixed solution after the sodium silicate-silica sol is uniformly dispersed;
(2) preparing an organic silicon prepolymer solution: adding 80g of organoalkoxysilane into 124g of deionized water, stirring for 15min in a dispersion machine at the speed of 1000r/min, adding 5g of pH regulator and 80g of methanol, and continuing stirring for 20min to obtain an organic silicon prepolymer solution;
(3) preparing filler slurry: pouring 80g of deionized water, 20g of film-forming auxiliary agent, 2g of dispersing agent, 4g of wetting agent, 4g of defoaming agent and 4g of preservative into a stirring container, shearing and pre-dispersing the deionized water by using a stirring paddle at the rotating speed of 200r/min, uniformly stirring, adding 100g of rutile titanium dioxide, 10g of glass fiber, 10g of potassium titanate, 20g of diatomite and 20g of graphene, rapidly dispersing the rutile titanium dioxide, 10g of glass fiber, 10g of potassium titanate, 20g of diatomite and 20g of graphene at the rotating speed of 500r/min for 30min, reducing the rotating speed of the stirring paddle to 400r/min, adding 60g of hollow ceramic microspheres, stirring for 20min, and obtaining filler slurry when the fineness of the slurry is;
(4) preparing a coating: mixing the sodium silicate-silica sol mixed solution in the step (1) with the organic silicon prepolymer solution in the step (2), shearing and pre-dispersing for 15min by using a stirring paddle, wherein the rotating speed is 500r/min, adding the filler slurry in the step (3), 4g of adhesion promoter and 4g of antifreeze agent, stirring for 30min at 200r/min, adjusting the rotating speed of the stirring paddle to 100r/min when the fineness of the coating is less than 40 mu m, adding 2g of modified urea solution, 2.5g of polyacrylate, 2.5g of polyurethane thickener and 80g of deionized water, and stirring for 15min to obtain the inorganic heat-insulating coating.
Tests show that the coating has the fineness of 28 mu m and good stability, the all-band emissivity of the coating is 0.87, the all-band emissivity is 0.86, and the heat insulation temperature difference of the coating is 26.7 ℃.
TABLE 3 comparison of the Performance of the examples of the present invention with conventional sodium silicate/silicone-acrylic emulsion composite coatings
The above description is only a few specific embodiments of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications of the present invention, which facilitate the design, should fall within the scope of the protection of the present invention.
Claims (10)
1. The inorganic heat insulation coating is characterized by comprising the following components in parts by weight:
10-25% of sodium silicate;
5-20% of silica sol;
3-10% of organoalkoxysilane;
0.5-20% of lower alcohol;
0.1-0.5% of a pH regulator;
10-20% of rutile titanium dioxide;
1-10% of hollow microspheres;
3-8% of inorganic pigment and filler;
0.5-3.0% of graphene;
0.5-5.0% of film-forming auxiliary agent;
0.2-2.0% of rheological additive;
0.4-1.0% of an antifreezing agent;
0.1-0.5% of a dispersant;
0.2-0.5% of wetting agent;
0.1-0.5% of defoaming agent;
0.1-0.5% of adhesion promoter;
0.1-0.4% of preservative;
the balance being deionized water.
2. The inorganic thermal insulating coating according to claim 1, characterized in that: the general formula of the organoalkoxysilane is RnSi(OR’)4-nWherein n is not less than 1 and not more than 3, R is a C1-6 hydrocarbon group, and R' is a C1-5 hydrocarbon group or a C1-4 acyl group.
3. The inorganic thermal insulating coating according to claim 1, characterized in that: the lower alcohol is one or more of methanol, ethanol and propanol which are mixed according to any proportion.
4. The inorganic thermal insulating coating according to claim 1, characterized in that: the pH regulator is formed by mixing one or more of hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, acetic acid and formic acid with the lower alcohol according to claim 3 in any proportion.
5. The inorganic thermal insulating coating according to claim 1, characterized in that: the particle diameter D of the rutile type titanium dioxide50Less than or equal to 0.5 mu m; the inorganic pigment filler is formed by mixing one or more of silicon carbide, potassium titanate, diatomite, mica powder, talcum powder, heavy calcium powder and glass fiber according to any proportion, and the average particle diameter D of the inorganic pigment filler50≤20μm。
6. The inorganic thermal insulating coating according to claim 1, characterized in that: the film-forming additive is formed by mixing one or more of trimethylpentane diol, monoisobutyrate and alcohol ester 12 according to any proportion.
7. The inorganic thermal insulating coating according to claim 1, characterized in that: the rheological additive consists of a modified urea solution, polyacrylate and a polyurethane thickener.
8. The inorganic thermal insulating coating according to claim 1, characterized in that: the dispersant is sodium polycarboxylate.
9. The inorganic thermal insulating coating according to claim 1, characterized in that: the wetting agent is octyl phenol polyoxyethylene ether; the defoaming agent is polysiloxane polymer; the adhesion promoter is polyether modified polysiloxane solution; the antifreezing agent is propylene glycol.
10. A method for preparing the inorganic heat-insulating coating material according to claim 1, comprising the steps of:
(1) preparing a sodium silicate-silica sol mixed solution: adding sodium silicate into silica sol, stirring for 10-30 min in a dispersion machine at the speed of 100-1500 r/min, and obtaining a sodium silicate-silica sol mixed solution after the sodium silicate-silica sol is uniformly dispersed;
(2) preparing an organic silicon prepolymer solution: adding organoalkoxysilane into deionized water, stirring for 10-30 min in a dispersion machine at a speed of 100-1500 r/min, adding a pH regulator and lower alcohol, and continuously stirring for 10-30 min to obtain an organic silicon prepolymer solution;
(3) preparing filler slurry: pouring deionized water, a film forming auxiliary agent, a dispersing agent, a wetting agent, a defoaming agent and a preservative into a stirring container, shearing and pre-dispersing the mixture by using a stirring paddle at the rotating speed of 10-200 r/min, adding rutile titanium dioxide, inorganic pigment and filler and graphene after uniformly stirring, rapidly dispersing the rutile titanium dioxide, the inorganic pigment and the graphene at the rotating speed of 300-1000 r/min for 20-60 min, reducing the rotating speed of the stirring paddle to 200-500 r/min, adding hollow microspheres, stirring for 5-20 min, and obtaining filler slurry when the fineness of the slurry is less than 40 mu m;
(4) preparing a coating: mixing the sodium silicate-silica sol mixed solution in the step (1) with the organic silicon prepolymer solution in the step (2), performing shearing pre-dispersion on the mixture for 5-15 min by using a stirring paddle, wherein the rotating speed is 300-1500 r/min, adding the filler slurry, the adhesion promoter and the anti-freezing agent in the step (3), stirring for no less than 30min at 200-500 r/min, adjusting the rotating speed of the stirring paddle to be no more than 150r/min when the fineness of the coating is less than 40 mu m, adding the rheological additive and the rest of deionized water, and stirring for 5-20 min to obtain the inorganic heat-insulating coating.
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| CN115612325A (en) * | 2022-10-27 | 2023-01-17 | 特灵空调系统(中国)有限公司 | Metal inorganic coating and preparation method and application thereof |
| CN115838540A (en) * | 2022-12-29 | 2023-03-24 | 上海墙特节能材料有限公司 | Color-adjustable long-acting reflective radiation heat-insulation inorganic building coating and preparation method thereof |
| CN116285445A (en) * | 2023-04-28 | 2023-06-23 | 广东碧橙材料科技有限公司 | Anti-condensation inorganic silicate paint and preparation method thereof |
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