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SiO2 aerogel thermal insulation latex paint and preparation method thereof

A technology of heat insulation and latex coatings, applied in latex paints, coatings, fibrous fillers, etc., can solve the problems of reduced thermal insulation performance of coatings, low airgel strength, low thermal conductivity, etc., to improve performance, Good toughness and compactness, high safety effect

Active Publication Date: 2014-06-25
广州泰祥混凝土外加剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Airgel, as a new type of lightweight super thermal insulation material with good thermal insulation performance, has a nanoporous structure with a controllable structure. Due to its unique nanostructure, it has unique properties such as low thermal conductivity, low density and high specific surface area. Performance, the thermal conductivity is about 0.013W / m·K, and the density is 0.11~0.15g / cm 3 , high specific surface area is about 500 ~ 1200m 2 / g, and the airgel has superhydrophobicity with a contact angle of up to 160° after special processing, and also has the characteristics of corrosion resistance and high temperature resistance. It is an excellent heat insulation material, but due to the airgel The strength is low and the wear resistance is poor, so airgel particles are often combined with resin, fiber, etc. to make airgel composite materials for engineering applications
Chinese patent CN1546312A discloses an aerogel composite flexible thermal insulation film and its preparation method. The patent is to use silicone resin and aerogel composite to make a thermal insulation coating, but because the liquid resin is very easy to Immersed in the nano-holes of the airgel, the overall thermal insulation performance of the coating is reduced. Therefore, it is necessary to further improve the prior art using aerogel as a raw material to prepare thermal insulation coatings

Method used

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  • SiO2 aerogel thermal insulation latex paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] This embodiment is SiO by mass percentage 2 1% airgel particles, 89% silicone acrylic exterior wall latex paint and 10% deionized water are mixed and configured.

[0046] Dilute the silicone-acrylic exterior wall latex paint with deionized water first, and place it on a magnetic stirrer to stir for 20 minutes, then divide it into two parts of equal mass and mark them as A and B respectively, and use A as a control sample; Weigh SiO with a mass percentage of 1% 2 Mix one part of airgel particles with B part of diluted latex paint and stir for 20 minutes to obtain a uniformly mixed SiO 2 Airgel thermal insulation latex paint and marked as C, the following is A part of silicone acrylic exterior wall latex paint and C part of SiO 2 Comparison of the performance of airgel thermal insulation latex coatings:

[0047] First, clean the surface of an ordinary white glass sheet with a size of 25mm×30mm and a thickness of 5mm, that is, first wash off various stains on the glass ...

Embodiment 2

[0049] In this embodiment, the content by mass percentage is SiO 2 5% of airgel particles, 80% of silicone acrylic exterior wall latex paint and 15% of deionized water are mixed and configured. The steps are the same as in Example 1, and the thermal conductivity of the sample is measured with a flat-panel transient thermal conductivity meter, and the silicon acrylic exterior wall latex paint coating and SiO can be obtained correspondingly. 2 The thermal conductivity of airgel thermal insulation latex coatings are 0.976, 0.887, 0.844W / mK and 0.611, 0.520, 0.397W / mK respectively. It can be seen that adding 5% SiO 2 After airgel, SiO 2 Compared with the silicone acrylic exterior wall latex paint, the thermal conductivity of the silicone airgel thermal insulation latex paint is reduced by more than 40%.

Embodiment 3

[0051] In this embodiment, the content by mass percentage is SiO 2 Mix 10% airgel particles, 75% silicone acrylic exterior wall latex paint and 15% deionized water. Step is the same as embodiment 1, except that the volumes of the selected silicon acrylic exterior wall latex paint and thermal insulation latex paint are 100mm respectively 3 、450mm 3 , and then the silicone acrylic exterior wall latex paint and SiO 2 Airgel thermal insulation latex coating. Measure the thermal conductivity of the sample with a flat-panel transient thermal conductivity meter, and the corresponding silicon acrylic exterior wall latex paint and SiO 2 The thermal conductivity coefficients of airgel thermal insulation latex coatings are 1.075, 0.976W / mK and 0.214 and 0.187W / mK, respectively. It can be seen that after adding 10% airgel, SiO 2 The thermal conductivity of airgel thermal insulation latex paint is more than 80% lower than that of silicone acrylic exterior wall latex paint.

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Abstract

The invention discloses a SiO2 aerogel thermal insulation latex paint and a preparation method of the SiO2 aerogel thermal insulation latex paint. The paint is formed by proportionally stirring SiO2 aerogel particles, emulsion paint and water. The SiO2 aerogel thermal insulation latex paint has the characteristics of good thermal insulation, flame resistance, high temperature resistance, incombustibility, high safety, high toughness, high compactness and the like, and is good thermal insulation paint.

Description

technical field [0001] The invention relates to a thermal insulation coating, in particular to a high-performance SiO 2 Airgel thermal insulation latex paint and preparation method thereof. Background technique [0002] Building energy consumption accounts for 30% to 40% of human energy consumption, while in developed cities the energy consumed by heating and heating in summer and winter has accounted for 40% to 50% of the total energy consumption of buildings. Thermal insulation performance is an important way to reduce building energy consumption and improve building functions. In recent years, the method of using energy-saving thermal insulation mortar and thermal insulation coating on the wall of buildings has attracted more and more attention. However, currently commonly used thermal insulation coatings are mostly prepared by using conventional thermal insulation coatings such as sepiolite, expanded perlite, expanded vermiculite, etc. as thermal insulation additives. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/12C09D133/04C09D131/04C09D123/16C09D125/14C09D5/02C09C1/28C09C3/12
Inventor 吴会军丁云飞廖云丹张宝玉
Owner 广州泰祥混凝土外加剂有限公司
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