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A kind of preparation method of nanocomposite water-based thermal insulation coating

A nano-composite, heat-insulating coating technology, applied in the direction of reflection/signal coatings, coatings, etc., can solve problems such as comprehensive performance gaps, achieve low cost, enhance international competitiveness, and improve processing adaptability

Active Publication Date: 2018-05-15
HANGZHOU KUNFU TEXTILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its comprehensive performance in all aspects is far behind that of solvent-based coatings, so the development of water-based coatings with excellent performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A nanocomposite water-based heat-insulating coating and a preparation method thereof. Step (1): 5g of sodium hexametaphosphate was added to 500mL of deionized water; then, 128g of nano-titanium dioxide, 64g of nano-silicon dioxide, and 22g of halloysite nanotubes were added successively; 45 min, ultrasonic treatment for 20 min under 200W ultrasonic power, and finally filtered through a 200-mesh sieve to obtain a nanocomposite aqueous dispersion with a solid content of 30%.

[0021] Step (2): Add 85.6g of styrene-acrylic resin emulsion to the above-mentioned nanocomposite aqueous dispersion, disperse for 5min at a shear rate of 2500r / min, then add 12.05g of hydroxyethyl cellulose and 12.05g of polyvinyl alcohol in sequence , 2.14g defoamer, 4.02g lubricant, 3.01g water repellant, 0.48g antibacterial agent, and continue to disperse for 15min at a shear rate of 2500r / min. Subsequently, the pH of the system was adjusted to 7.5 with dilute NaOH solution, and finally the mat...

Embodiment 2

[0023] A nanocomposite water-based heat-insulating coating and a preparation method thereof. Step (1): 5g of sodium hexametaphosphate was added to 500mL of deionized water; then, 128g of nano-titanium dioxide, 64g of nano-silicon dioxide, and 22g of halloysite nanotubes were added successively; 45 min, ultrasonic treatment for 20 min under 200W ultrasonic power, and finally filtered through a 200-mesh sieve to obtain a nanocomposite aqueous dispersion with a solid content of 30%.

[0024] Step (2): Add 107g of styrene-acrylic resin emulsion to the above-mentioned nanocomposite aqueous dispersion, disperse for 5min at a shear rate of 2500r / min, then add 12.05g of hydroxyethyl cellulose and 12.05g of polyvinyl alcohol in sequence, 2.14g defoamer, 4.02g lubricant, 3.01g water repellant, 0.48g antibacterial agent, and continue to disperse at a shear rate of 2500r / min for 15min. Subsequently, the pH of the system was adjusted to 7.5 with dilute NaOH solution, and finally the mater...

Embodiment 3

[0026] A nanocomposite water-based heat-insulating coating and a preparation method thereof. Step (1): 5g of sodium hexametaphosphate was added to 500mL of deionized water; then, 128g of nano-titanium dioxide, 64g of nano-silicon dioxide, and 22g of halloysite nanotubes were added successively; 45 min, ultrasonic treatment for 20 min under 200W ultrasonic power, and finally filtered through a 200-mesh sieve to obtain a nanocomposite aqueous dispersion with a solid content of 30%.

[0027] Step (2): Add 128g of styrene-acrylic resin emulsion to the above nanocomposite aqueous dispersion, disperse for 5min at a shear rate of 2500r / min, then add 12.05g of hydroxyethyl cellulose and 12.05g of polyvinyl alcohol in sequence, 2.14g defoamer, 4.02g lubricant, 3.01g water repellant, 0.48g antibacterial agent, and continue to disperse at a shear rate of 2500r / min for 15min. Subsequently, the pH of the system was adjusted to 7.5 with dilute NaOH solution, and finally the material was fi...

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Abstract

The invention relates to a preparation method of a nanometer composite water-based thermal insulation coating. The preparation method comprises the steps that nanometer composite water-phase dispersing liquid is prepared by taking nano-titanium dioxide as reflective insulation pigments, taking halloysite nanotubes as functional filler and taking nano-silicon dioxide as inorganic filler through a certain time of high-speed shearing and dispersing; styrene-acrylic resin, hydroxyethyl cellulose, polyvinyl alcohol, a defoaming agent, a lubricating agent, a water repellent agent, an antibacterial agent, a diluted NaOH solution, deionized water and the like are added according to a specific process, and after high-speed shearing and dispersing, pH value regulating, screening for filtering are conducted, the water-based thermal insulation coating is prepared. According to the water-based thermal insulation coating, the preparation conditions are mild, new equipment does not need to be additionally arranged, the process is simple, and the production cost is low; water is taken as a dispersing medium, and therefore the green design idea is met; meanwhile, a nanomaterial and a hollow material are selected as the pigments, and therefore the thermal insulation property and the weather resistance of the coating can be comprehensively promoted.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional coatings for building exterior walls, and in particular relates to a preparation method of a nano-composite water-based heat-insulating coating, which is mainly used to effectively improve the building enclosure environment, realize energy saving and emission reduction, and protect the environment. Background technique [0002] Heat reflective heat insulation coating refers to the coating applied on the surface of the building, which has a high solar reflectance and hemispherical emissivity, and can play a role in heat insulation. It can effectively reflect, block, and radiate the energy of sunlight, obviously Reduce the temperature of building exterior walls, roofs and indoors, reduce the energy consumption of refrigeration equipment such as air conditioners under high temperature conditions, improve the working environment and save a lot of energy. Therefore, the research and d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D125/14C09D5/33C09D7/20
CPCC08K2201/011C08L2205/03C09D5/004C09D125/14C08L1/284C08L29/04C08K13/04C08K2003/2241C08K3/36C08K7/24
Inventor 唐艳军黄彪彪胡秀兰张馨琪郭大亮
Owner HANGZHOU KUNFU TEXTILE
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