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Preparation method of heat-reflecting insulation coating

A heat-insulating coating and heat-reflecting technology, applied in reflective/signal coatings, coatings, etc., can solve the problems of difficult coating performance, easy agglomeration of nanoparticles, no mention of ZnO dispersion treatment, etc., to achieve waterproof and adhesion. Good focus, high visible light transmittance, transparent and uniform appearance

Inactive Publication Date: 2010-03-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coating prepared by this method is actually just a simple compounding of nanoparticles and base materials. Due to the small specific surface area and high surface free energy of the nanoparticles, the nanoparticles are easily agglomerated into agglomerates. This characteristic determines the direct coating Adding nanoparticles to paint is difficult to really improve the performance of the paint
Such as Chinese patent application No. 99117416.X (publication number CN1298907) mentions the use of nano-ZnO as a bactericidal material, does not mention that ZnO is dispersed and can have other special functions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A preparation method for a heat-reflective heat-insulating coating, which comprises the steps of:

[0052] 1) Preparation of heat reflective nano-powder slurry: take rutile nano-TiO 2 and nano-ZnO each 10g [i.e. nano-powder 20g; rutile nano-TiO 2 , the particle diameter of nano-ZnO is 10~100nm], polyoxyethylene fatty acid ester 1g (wetting agent), sodium dodecylbenzene sulfonate 0.2g (defoamer), sodium hexametaphosphate 3g (dispersant) , the mixed solution (diluent) of the deionized water of 40g and the dehydrated alcohol of 35.8g;

[0053] Mix wetting agent, dispersant, defoamer, diluent and nano-powder, adjust the pH value to 7.0 with ammonia water, stir on a high-speed homogenizer for 2 hours, and ultrasonically disperse and stir for 30 minutes to obtain a heat-reflecting nano-powder slurry ;

[0054] 2) Preparation of thermal insulation powder slurry: Take 20g of hollow glass microspheres [model QH-450, particle size 10-45μm; i.e. thermal insulation powder], 10g ...

Embodiment 2

[0060] A preparation method for a heat-reflective heat-insulating coating, which comprises the steps of:

[0061] 1) Preparation of heat reflective nano-powder slurry: take rutile nano-TiO 2 and nano-ZnO each 10g [i.e. nano-powder 20g; rutile nano-TiO 2 , The particle size of nano-ZnO is 10-100nm, add polyoxyethylene nonylphenyl ether 1g, sodium dodecylbenzenesulfonate 0.2g (defoamer), sodium trimetaphosphate 3g (dispersant), 40g Deionized water and 35.8g of absolute ethanol mixed solution (diluent), adjust the pH value to 7.0 with ammonia water, ultrasonically disperse for 0.5h, stir on a high-speed homogenizer for 1h, and ultrasonically disperse and stir for 30min to obtain heat-reflecting nanopowder slurry;

[0062] 2) Preparation of thermal insulation powder slurry: take hollow ceramic microbeads [that is, thermal insulation powder; the model of hollow ceramic microspheres is QH-750, the particle size is 10-100μm20g, silane coupling agent (KH-570) 10g, deionized water 3...

Embodiment 3

[0068] A preparation method for a heat-reflective heat-insulating coating, which comprises the steps of:

[0069] 1) Preparation of heat reflective nano-powder slurry: take rutile nano-TiO 2 and nano-ZnO each 10g [i.e. nano-powder 20g; rutile nano-TiO 2 , the particle diameter of nano-ZnO is 10~100nm], add polyoxyethylene fatty acid ester 1g (wetting agent), sodium dodecylbenzene sulfonate 0.2g (defoamer), sodium hexametaphosphate 3g (dispersant ), 40g of deionized water and 35.8g of ethanol mixed solution (diluent), adjust the pH value to 7.5 with ammonia water, stir on a high-speed homogenizer for 2h, and ultrasonically disperse and stir for 30min to obtain a heat-reflecting nano-powder slurry;

[0070] 2) Preparation of thermal insulation powder slurry: take 20g of hollow glass microspheres [that is, thermal insulation powder; model QH-450, the particle size is 10-45μm], 10g of silane coupling agent (KH-590), and remove 30g of ionized water, 40g of absolute ethanol;

[0...

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Abstract

The invention relates to a preparation method of a heat-reflecting insulation coating, which is characterized by comprising the following steps of: 1) preparation of heat-reflecting nano-powder slurry; 2) preparation of insulation powder slurry; 3) preparation of heat-reflecting insulation coating: adding silicone-modified acrylic emulsion or styrene-acrylic emulsion, a defoamer, a thickener and afilm-forming auxiliary agent to the heat-reflecting nano-powder slurry, later adjusting the pH to 6.5-7. 0, and stirring for 2-3h, so as to obtain the heat-reflecting emulsion; and then treating theinsulation powder slurry for 1-2h at the temperature of 85-90 DEG C under water bath, which is then added to the heat-reflecting emulsion and stirred for 3h, and finally obtaining the heat-reflectinginsulation coating. The preparation method of the heat-reflecting insulation coating has the advantages of simple preparation process, higher visible light transmittance rate and infrared reflection for the coating, transparent and uniform coating, good adhesion and washing resistance, and outstanding ultraviolet aging resistance, and can be widely used on the exterior walls and the outdoor sunshade fabrics for heat insulating and cooling.

Description

technical field [0001] The invention relates to a preparation method of a heat-reflecting and heat-insulating paint, which is mainly used for building exterior walls or outdoor sunshade fabrics. Background technique [0002] Building energy consumption is nearly 1 / 3 of the energy consumption of the whole society, and the existing nearly 40 billion m 2 99% of buildings are high-energy-consuming buildings, and more than 95% of new buildings are also high-energy-consuming buildings. The energy consumption per unit building area is more than three times that of new buildings in developed countries. [0003] my country's goal of building energy conservation is that by 2010, more than one-third of the country's new buildings will meet the standards of green buildings and energy-saving buildings, and the total energy consumption of urban buildings in the country will achieve 50% energy saving. Reach 65% energy saving. The quality, performance and development of building thermal in...

Claims

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Application Information

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IPC IPC(8): C09D133/04C09D125/14C09D7/12C09D5/33
Inventor 马保国戴璐张风臣高立陈全滨
Owner WUHAN UNIV OF TECH
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