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A kind of airgel thermal insulation coating and preparation method thereof

A technology for thermal insulation coatings and aerogels, applied in coatings and other directions, can solve the problems of decreased mutual binding force, large brittleness, and affect dispersibility, etc., to improve the defects of low coating strength, excellent porous thermal insulation performance, and improve dispersion stability. sexual effect

Active Publication Date: 2022-05-06
四川汇园宝新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the low strength and high brittleness of silica airgel, it needs to be combined with other raw materials to improve its defects; and only by maintaining its inherent nanoporous network structure can silica airgel play a good role in heat preservation. Therefore, it is necessary to use hydrophobic silica airgel, but this hydrophobicity will affect its dispersibility in water-based coatings, especially when its content is large, it will make the interaction of various raw materials in the coating Decreased binding force will lead to a sharp drop in the tensile strength of the coating film, which is prone to cracking and affects its performance

Method used

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  • A kind of airgel thermal insulation coating and preparation method thereof
  • A kind of airgel thermal insulation coating and preparation method thereof

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preparation example

[0043] The raw materials in the following preparation examples are all commercially available. Among them, the fineness of ultrafine zeolite powder is 8000-10000 mesh; the fineness of attapulgite is 6000-8000 mesh.

[0044] As shown in Table 1, the main difference between Preparation Examples 1-6 of hydrophobic nanocellulose airgel lies in the different ratios of raw materials.

[0045] Hereinafter, the preparation example 1 of the hydrophobic nanocellulose airgel is taken as an example for illustration.

[0046] The preparation method of hydrophobic nano-cellulose airgel comprises the steps:

[0047] ① Disperse nanocellulose, ultrafine zeolite powder and attapulgite in 300kg of water, and ultrasonically disperse for 30min under the condition of ultrasonic frequency of 20kHz and ultrasonic power of 20W to obtain a nanocellulose mixture;

[0048] ②Use 5wt% dilute hydrochloric acid to adjust the pH of the nanocellulose mixture to 4, add methyltrimethoxysilane and dimethyldiall...

Embodiment 1

[0060] A kind of preparation method of airgel thermal insulation coating comprises the steps:

[0061] Mix 2000g water, 10g wetting agent, 30g dispersant, 27g cellulose, 135g titanium dioxide, 2390g calcium carbonate and 270g hydrophilic modified kaolin, stir and disperse at 1000r / min for 30min, then add 380g film-forming emulsion , 20g of film-forming aid and stir evenly, then add 1400g of hollow glass microspheres, 1500g of hydrophobic nano-silica aerogel, and 1000g of hydrophobic nano-cellulose aerogel and stir evenly.

[0062] Wherein, the cellulose is hydroxyethyl cellulose, and the hydrophobic nanocellulose airgel is prepared from Preparation Example 1 of the hydrophobic nanocellulose airgel.

Embodiment 2

[0064] A kind of preparation method of airgel thermal insulation coating comprises the steps:

[0065] Mix 2200g water, 12g wetting agent, 35g dispersant, 29g cellulose, 140g titanium dioxide, 2410g calcium carbonate, 280g hydrophilic modified kaolin, stir and disperse at 1000r / min for 30min, then add 400g film-forming emulsion , 24g film-forming aid and stir evenly, then add 1600g hollow glass microspheres, 2000g hydrophobic nano-silica aerogel, 1500g hydrophobic nano-cellulose aerogel and stir evenly.

[0066] Wherein, the cellulose is hydroxyethyl cellulose, and the hydrophobic nanocellulose airgel is prepared from Preparation Example 1 of the hydrophobic nanocellulose airgel.

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Abstract

The application relates to the field of building thermal insulation materials, and specifically discloses an airgel thermal insulation coating and a preparation method thereof. An airgel thermal insulation coating, comprising the following raw materials in parts by weight: 2000-2200 parts of water, 1500-2000 parts of hydrophobic silica airgel, 1000-1500 parts of hydrophobic nano-cellulose airgel, 1400-1600 parts of hollow glass microspheres, 135-140 parts of titanium dioxide, 2390-2410 parts of calcium carbonate, 270-280 parts of hydrophilic modified kaolin, 380-400 parts of film-forming emulsion, 20-24 parts of film-forming aids, 10-12 parts of wetting agent, 30-35 parts of dispersant and 27-29 parts of cellulose. The airgel thermal insulation coating of the present application can be used for thermal insulation and thermal insulation systems of interior and exterior walls of various buildings, and has the advantages of good thermal insulation performance, high coating film strength, good toughness, and not easy to crack.

Description

technical field [0001] The application relates to the field of building thermal insulation materials, more specifically, it relates to an airgel thermal insulation coating and a preparation method thereof. Background technique [0002] Building insulation refers to the materials used to maintain the indoor temperature of the building by taking measures to reduce the heat emitted from the building's interior to the outside. The traditional building energy-saving and thermal insulation method is to wrap a layer of materials with low thermal conductivity (such as EPS, XPS, rock wool board, etc.) [0003] EPS (expandable polystyrene board) and XPS (extruded polystyrene board) are foamed plastic materials, which have good thermal insulation properties, but they are flammable and easily cause environmental pollution. Rock wool board is an inorganic thermal insulation material, which has excellent thermal stability, fire resistance and thermal insulation, but has the problems of e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/04C09D7/61C09D7/62C09D7/65
CPCC09D143/04C09D7/61C09D7/70C09D7/62C09D7/65C08L1/284C08L1/02C08K7/26C08K7/28C08K3/346C08K9/08C08L1/04
Inventor 吕茂海余志明吕金宝何小平吕媛媛
Owner 四川汇园宝新材料科技有限公司