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A kind of high-reflectivity acrylic heat-shielding paint and preparation method thereof

A high-reflectivity, acrylic technology, applied in the direction of reflection/signal coatings, coatings, etc., can solve problems such as room temperature rise, unsatisfactory cooling effect, poor heat insulation performance of coatings, etc., and achieve excellent reflection performance and excellent covering ability , the effect of high dielectric constant

Active Publication Date: 2020-09-25
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, there are many studies on heat-shielding coatings at home and abroad. The existing CN 104830178 A discloses a solar heat-reflecting heat-insulating coating for metal surfaces and its preparation method and application. The solar reflectance of the coating film is above 0.9 , but the thickness of the coating film needs to reach more than 2mm, which is not ideal
CN 1583894 discloses a method for preparing a heat-insulating reflective coating. The dry film thickness is 0.3-0.8mm, and the average reflectance to heat rays is above 0.9, but it can only reduce the surface temperature of the substrate by 10-20°C, and the cooling effect is not enough ideal
None of the coatings in the prior art can achieve a high reflection effect with a relatively low thickness, resulting in more heat accumulation and transmission on the wall surface, which in turn leads to an increase in room temperature, and poor heat insulation performance of the coating

Method used

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  • A kind of high-reflectivity acrylic heat-shielding paint and preparation method thereof
  • A kind of high-reflectivity acrylic heat-shielding paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Proportion by mass percentage: Hydroxy acrylic resin (Taichang Resin Co., Ltd., 7119-X-50) is 44%, R-803 titanium dioxide (particle size range 200-900nm) is 26%, modified aluminum powder (surface coating Flake aluminum powder covered with titanium dioxide) is 9%, xylene is 8%, butyl acetate is 5%, high boiling point solvent DBE (divalent ester) is 1%, 245 leveling agent is 0.5%, BYK- 065 defoamer is 0.5%, 202P anti-sedimentation agent is 1wt%, and hollow glass microspheres (particle size range 10-30 μm, Shanghai Zhenxu Chemical Co., Ltd.) are 5%;

[0045] Preparation method: Add 6g of flake aluminum powder (particle size range 8-15μm) into 200ml of absolute ethanol for ultrasonic dispersion, and stir at 60°C for 30min, add 20ml of butyl titanate, continue to stir for 6h, and stand still to obtain white gray The precipitate was centrifugally filtered and dried at 100°C to obtain modified aluminum powder. Stir hydroxyacrylic resin, solvent, and various additives at a med...

Embodiment 2

[0047] Proportion according to mass percentage: hydroxyacrylic resin (Taichang Resin Co., Ltd., 7119-X-50) is 46%, titanium dioxide titanium dioxide (particle size range 200 ~ 900nm, Yunnan Xinli, R-803) is 23%, Hollow glass microspheres (particle size range 10-30 μm, Shanghai Zhenxu Chemical Co., Ltd.) 5%, modified aluminum powder (flaky aluminum powder coated with titanium dioxide on the surface) 9%, xylene 7.5%, acetic acid Butyl ester is 4.5%, high boiling point solvent DBE is 0.9%, BYK-161 dispersant is 2%, 245 leveling agent is 0.44%, BYK-065 defoamer is 0.66%, 202P anti-settling agent is 1%;

[0048] Preparation method: Add 6g of flake aluminum powder (particle size range 8-15μm) into 200ml of absolute ethanol for ultrasonic dispersion, and stir at 60°C for 30min, add 20ml of butyl titanate, continue to stir for 6h, and stand still to obtain white gray The precipitate was centrifugally filtered and dried at 100°C to obtain modified aluminum powder; the hydroxyacrylic ac...

Embodiment 3

[0050] Proportion by mass percentage: Hydroxy acrylic resin (Taichang Resin Co., Ltd., 7119-X-50) is 46%, titanium dioxide (particle size range 200-900nm, Yunnan Xinli, R-803) is 23%, modified Aluminum powder (flake aluminum powder coated with titanium dioxide on the surface) is 9%, xylene is 7.7%, hollow glass microspheres (particle size range 10-30 μm, Shanghai Zhenxu Chemical Co., Ltd.) is 4%, butyl acetate 5% for high boiling point solvent DBE, 2.3% for BYK-161 dispersant, 0.5% for 245 leveling agent, 0.5% for BYK-065 defoamer, 1% for 202P anti-settling agent;

[0051] Preparation method: Add 6g of flake aluminum powder (particle size range 8-15μm) into 200ml of absolute ethanol for ultrasonic dispersion, and stir at 60°C for 30min, add 20ml of butyl titanate, continue to stir for 6h, and stand still to obtain white gray The precipitate was centrifugally filtered and dried at 100°C to obtain modified aluminum powder; the hydroxyacrylic acid emulsion, solvent, and various a...

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Abstract

The invention relates to an acrylic heat insulation coating with high reflectivity and a preparation method of the acrylic heat insulating coating. The acrylic heat insulation coating with high reflectivity is prepared from 20wt%-55wt% of acrylic resin, 10wt%-33wt% of titanium dioxide, 6wt%-12wt% of modified aluminum powder, 3.2wt%-7.6wt% of heat insulation functional filler, 9wt%-17wt% of a mixedsolvent and the balance of aids, wherein the modified aluminum powder is flaky aluminum powder with the surface coated with titanium dioxide. Acrylic resin is used as a film forming substance, the high-reflectivity flaky aluminum powder with surface coated with titanium dioxide, titanium dioxide and the heat insulation functional filler with good heat insulation performance and very low heat transfer coefficient are added, so that the heat reflecting coating has the characteristic of integration of solar ray reflection, infrared light wave radiation and heat conduction barrier and has very good heat insulation and cooling effects.

Description

technical field [0001] The invention relates to a high-reflectivity acrylic heat-shielding paint and a preparation method thereof, belonging to the technical field of heat-shielding paints. Background technique [0002] With the improvement of living standards, people's demand for energy is also increasing. The energy consumed by my country's construction industry accounts for a quarter of the total energy consumption, while the energy consumed by cooling and heating accounts for the total energy consumption of the construction industry. More than half of the total, and it is increasing year by year. Therefore, heat-reflective heat-shielding energy-saving coatings have very extraordinary research significance. Brushing it on the outer surface of the object can reduce the accumulation of heat on the surface of the coating and the transfer in the coating, so that the temperature of the outer surface will drop, thereby achieving the purpose of reducing the internal temperature ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/00C09D5/33C09D7/61
CPCC08K7/28C08K9/10C08K2003/0812C08K2003/2241C09D5/004C09D133/00
Inventor 高彦峰宋炳坷何晓燕张志华窦维维杨光陈长
Owner SHANGHAI UNIV
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