Double-shell-microcapsule thermal-insulation water-based coating and preparation method thereof

A double-layer shell, microcapsule technology, applied in microcapsule preparation, microsphere preparation, reflection/signal coating, etc., to achieve the effect of good dispersion, less agglomeration and uniform coating

Active Publication Date: 2016-10-12
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention proposes a heat-reflective exterior wall building insulation water-based coating based on double-layer shell phase change temperature control microcapsules and a preparation method thereof. The mixture of capsules and high-refractive-index oxide powder is a heat-insulating functional filler. The double-layer shell includes a polymer inner shell and a high-refractive...

Method used

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  • Double-shell-microcapsule thermal-insulation water-based coating and preparation method thereof
  • Double-shell-microcapsule thermal-insulation water-based coating and preparation method thereof
  • Double-shell-microcapsule thermal-insulation water-based coating and preparation method thereof

Examples

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Embodiment 1

[0031] Thermal insulation coating based on nano titanium dioxide powder and titanium dioxide / polymethyl methacrylate phase change temperature control microcapsules. The composition of the coating includes: water 45g, emulsion 45g, and titanium dioxide powder with an average particle size of 150 nanometers (R- 218) 4g, titanium dioxide / polymethyl methacrylate phase change temperature control microcapsules with an average particle size of 1 micron, the mass of 1g, polyurethane modified polyether thickener (SN-621N) 3g, multifunctional additives (AMP -95) 0.6g, defoamer (NXZ) 0.3g, anti-mold agent (ROCIMA342) 0.2g, anti-aging agent (Chimassorb 81) 0.2g. The preparation method is as follows:

[0032] First, add a polyacrylic acid dispersant with a weight average molecular weight of 20,000 to the water to adjust the pH of the solution to 3 to 5; then add the thermal insulation functional filler, the mass fraction of the thermal insulation functional filler is 8%, the dispersant and th...

Embodiment 2

[0038] Thermal insulation coating based on nano zirconia powder and zirconia / polymethyl methacrylate phase change temperature control microcapsules. The composition of the coating includes: 20g water, 35g emulsion, and zirconia powder with an average particle size of 250 nanometers 24g, zirconia / polymethyl methacrylate phase change temperature control microcapsules with an average particle size of 15 microns, 6g, polyurethane modified polyether thickener (SN-621N) 0.1g, multifunctional additives (AMP-95) ) 0.4g, defoamer (NXZ) 0.2g, antifungal agent (ROCIMA 342) 0.2g, anti-aging agent (Chimassorb 81) 0.3g. The preparation method is as follows:

[0039] First, add ammonium polyacrylate dispersant with a weight average molecular weight of 40,000 to the water to adjust the pH of the solution to 3-5; then add the heat-insulating functional filler, stir and react at 70-90°C for 0.5-2 hours; the quality of the heat-insulating functional filler The fraction is 15%, and the mass ratio o...

Embodiment 3

[0045] Thermal insulation coating based on nano tin oxide powder and tin oxide / methyl methacrylate and methacrylic acid copolymer phase change temperature control microcapsules. The composition of the coating includes: 30g water, 40g emulsion, and an average particle size of 350 nanometers 18g of tin oxide powder, 2g of tin oxide / methyl methacrylate and methacrylic acid copolymer phase change temperature control microcapsules with an average particle size of 15 microns, polyurethane modified polyether thickener (SN-612N) 0.5 g. Multifunctional auxiliary agent (AMP-95) 0.5g, defoamer (NXZ) 0.25g, antifungal agent (ROCIMA 342) 0.25g, anti-aging agent (Chimassorb 81) 0.2g. The preparation method is as follows:

[0046] First, add a polyvinyl alcohol dispersant with a weight average molecular weight of 30,000 to the water to adjust the pH of the solution to 3-5; then add heat-insulating functional fillers, and stir for 0.5-2 hours at 70-90°C; among them, the heat-insulating function ...

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Abstract

The invention aims to solve the problems that current phase-change temperature-control microcapsule coating is low in solar reflectivity, uneven in coating and the like and provides a heat-reflection type building-outer-wall thermal-insulation water-based coating based on double-shell phase-change temperature-control microcapsules and a preparation method of the water-based coating. The mixture of the double-shell phase-change temperature-control microcapsules and high-refractive-index oxides is used as the thermal-insulation functional filler, the core materials of double-shell phase-change temperature-control microcapsules are paraffin with the phase change temperature being 38-45 DEG C, each double shell comprises a polymer inner shell layer and a high-refractive-index oxide-particle outer shell layer, and the particle size of high-refractive-index oxide particles ranges from 150 nanometers to 350 nanometers. The solar reflectivity of the water-based coating reaches above 85%, and the water-based coating has a certain phase-change temperature control function and is even in film coating.

Description

Technical field [0001] The invention relates to a building thermal insulation coating for external walls and a preparation method thereof, in particular to a heat reflection type external wall building thermal insulation water-based coating based on a double-shell phase change temperature control microcapsule and a preparation method thereof. Background technique [0002] At present, the energy consumption of buildings in my country accounts for about 1 / 3 of the total primary energy consumption of the society, and with the development of social economy and the improvement of people's living standards, the proportion of building energy consumption will continue to increase, and the energy utilization rate is still very low. , my country's building heating energy consumption is about three times that of developed countries, of which external walls are 4 to 5 times, roofs are 2.5 to 5.5 times, and exterior windows are 1.5 to 2.2 times. This shows that my country has a lot of work to ...

Claims

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Application Information

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IPC IPC(8): C09D133/04C09D125/14C09D5/33C09D7/12B01J13/02
CPCB01J13/02C08K2201/011C08L2205/02C08L2205/025C08L2205/035C09D5/004C09D7/65C09D125/14C09D133/04C08L33/02C08K9/10C08K2003/2241C08K2003/2244C08K2003/2296C08K2003/2231C08L71/00
Inventor 徐雪青付小艺何新华徐得华徐刚
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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