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Nano porous corrosion-resistant heat-insulated coating material taking thixotropic colloid as template agent and preparation method for corrosion-resistant heat-insulated coating material

A thermal insulation coating and nanoporous technology, applied in anti-corrosion coatings, coatings, climate sustainability, etc., can solve the problems of large density difference, low density and unsafe aerogel materials, and achieve the effect of high compatibility

Active Publication Date: 2016-02-10
浙江圣润纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of preparing airgel materials through sol-gel formation of network nanopores requires special equipment such as supercritical drying equipment, or requires a large amount of organic sol replacement such as ethanol, n-hexane, etc. The process is complicated, the equipment investment is large, and because organic Solvents are flammable, explosive and unsafe
More importantly, the application and development of airgel materials in coatings is still very difficult for the following reasons: First, the density of airgel materials is extremely low, which is greatly different from other materials, and it is very difficult to disperse and mix in coatings; Hydrophobic airgel powder is difficult to mix with other materials in a water-based environment, and the product obtained in an oil-based environment is not environmentally friendly, and if a hydrophilic airgel powder is used in a water-based environment, it will be converted into a hydrogel, condensing The nanostructure of the glue hole will cause the hole structure to collapse due to the capillary force generated by the huge surface tension of the water phase, and the nanopore heat insulation benefit expected by the technicians cannot be exerted; the third is that the preparation cost of the airgel material is currently very high, even if it can Successfully added to the paint will also lead to a rapid increase in the cost of the paint, resulting in a reduction in the cost performance of the product
[0006] At present, there is no announcement of coating products with nanoporous structure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Take 40g of aluminum sol with a concentration of 40% and dissolve it in 50kg of water to prepare diluted aluminum sol, and let it stand for 2 days to obtain translucent thixotropic alumina colloid. Take 500g of alumina colloid, 200g of sodium silicate, 50g of vitrified microspheres, 50g of silicon micropowder, 50g of titanium oxide, 10g of mica, 20g of zinc oxide, and 0.5g of defoamer, and mix and stir to prepare a nanoporous anti-corrosion and heat-insulating coating. The temperature is 1000°C, and the thermal conductivity at room temperature is 0.035w / m·k.

Embodiment 2

[0067] Dissolve 50g of 30% silica sol in 300g of water to prepare diluted silica sol, and dissolve 40g of 40% aluminum sol in 500g of water to prepare diluted alumina sol. The diluted aluminum sol is placed in a container, and the diluted silica sol is slowly added under stirring at 600 r / min to obtain a translucent thixotropic silica-alumina colloid. Take 500g of silica-alumina colloid, 300g of aluminum dihydrogen phosphate, 100g of aluminum silicate hollow microspheres, 50g of alumina powder, 50g of zirconium silicate, 15g of mica, 30g of zinc phosphate, and 0.3g of shrinkage reducing agent, and mix and stir to obtain nano Porous anti-corrosion and heat-insulating coating, the service temperature is 1200°C, and the thermal conductivity at room temperature is 0.039w / m·k.

Embodiment 3

[0069] Take 10g of magnesium aluminum silicate and add 500g of water, soak for 24h, and then shear and disperse at a speed of 1800r / min for 3h to obtain viscous magnesium aluminum silicate thixotropic colloid. Take 500g of magnesium aluminum silicate colloid, 300g of water-based acrylic resin, 100g of floating beads, 20g of silica fume, 40g of titanium oxide, 20g of aluminum powder, and 0.1g of dispersant, and mix and stir to prepare a nanoporous anti-corrosion and heat-insulating coating. The use temperature is 600°C. Thermal conductivity at room temperature is 0.040w / m·k.

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Abstract

The invention relates to an aqueous nano porous corrosion-resistant heat-insulated coating material and a preparation method for the corrosion-resistant heat-insulated coating material and particularly relates to an aqueous corrosion-resistant heat-insulated coating material, which has a nano porous structure, prepared through forming an aqueous-phase uniform three-dimensional-network nano porous structure by taking thixotropic colloid as a template agent and adding a film forming agent, a reinforcing powder material, a functional powder material and admixtures. The preparation method for the corrosion-resistant heat-insulated coating material, disclosed by the invention, is simple and easy in operation and low in production cost, is environment-friendly and safe and is beneficial to mass production. The nano porous corrosion-resistant heat-insulated coating material disclosed by the invention has excellent heat insulating and corrosion resisting properties and can be applied to the heat insulating and corrosion resisting of equipment such as high-temperature furnace hearths, pipelines and valves in the fields of aerospace and military industries, metallurgical forging, petroleum refining, electric power and the like, so that the safety of use and the level of energy saving and consumption lowering are improved.

Description

technical field [0001] The invention relates to a water-based nano-porous anti-corrosion and heat-insulating coating and a preparation method thereof, in particular to using thixotropic colloid as a template agent to form a uniform three-dimensional network nano-porous structure in the water phase, by adding film-forming agents, reinforcing powders, and functional powders , admixture, and prepare a water-based anti-corrosion and heat-insulating coating with a nanoporous structure. The preparation method of the anti-corrosion and heat-insulating paint of the present invention has the advantages of simple operation, low production cost, environmental protection, safety, and is beneficial to mass production. The nanoporous anti-corrosion and heat-insulating coating of the present invention has excellent heat-insulating and anti-corrosion properties, and can be applied to the heat-insulating and anti-corrosion of high-temperature furnaces, pipelines, valves and other equipment in ...

Claims

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Application Information

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IPC IPC(8): C09D5/08C09D7/12C09D1/00C09D133/00
CPCY02P20/10
Inventor 金承黎
Owner 浙江圣润纳米科技有限公司
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