Infrared reflective heat insulation coating based on aluminum composite and preparation method thereof
A technology of infrared reflective pigments and heat-insulating paints, applied in reflective/signal paints, coatings, etc., can solve the problems of poor heat-insulating performance, single color, reducing the temperature of the exterior surface of the building and the cooling energy consumption of the indoor ambient temperature, etc. The effect of reducing indoor temperature, bright colors, and reducing cooling energy consumption
Inactive Publication Date: 2019-11-15
NANJING UNIV OF SCI & TECH
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Problems solved by technology
At the same time, the reflective heat-insulating coating composed of these pigments has a low solar reflectance in the infrared band, so the effect of reducing the external surface temperature of the building and the indoor ambient temperature to reduce cooling energy consumption is not obvious
[0005] Therefore, the problems in the prior art are: the color is single, contains heavy metal elements, and the heat insulation performance is poor
Method used
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Embodiment 1
[0048] First, an orange infrared reflective pigment (BiFe 1-x Al x o 3 - titanium dioxide-mica composite, x=0), the ratio of raw materials used is as shown in table 2, and concrete steps are as follows:
[0049] (1) Mica pretreatment: Soak mica with an average particle size of 30 μm in 5wt.% hydrochloric acid aqueous solution, with a solid-to-liquid volume ratio of 1:12, and stir in a water bath at 80°C for 40 minutes, filter, wash, and dry for later use ;
[0050] (2) Preparation of titanium dioxide-mica composite: take 4.23g of pretreated mica and make 10wt.% mica water suspension, and slowly add 1.12g 4wt.% titanium tetrachloride ethanol solution made of titanium tetrachloride, adjust the pH value of the suspension to about 7 with 15wt.% ammonia water, keep stirring in 80°C water bath for 1.5h after adding, filter and wash with water , dried for later use;
[0051] (3) Sol preparation: Bismuth nitrate pentahydrate and ferric nitrate nonahydrate are mixed according to a c...
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Abstract
The invention discloses an infrared-reflective thermal-insulation coating based on an aluminum complex and a preparation method thereof. The coating has a bright color, no toxic and harmful elements and good thermal insulation performance, and is energy-saving and environment-friendly. The coating comprises, by weight, 52 to 62% of a film-forming substance, 20 to 26% of an orange infrared reflective pigment, 15.6 to 19.6% of a solvent, 0.8 to 1.0% of a thickening agent, 0.8 to 1.0% of a leveling agent and 0.4 to 0.8% of a dispersing agent, wherein the orange infrared reflective pigment is a complex of BiFe<1-x>Al<x>O<3>, titanium dioxide and mica. The preparation method comprises the following steps: (10) preparation of the orange infrared reflective pigment: pretreating mica, preparing a titanium dioxide-mica complex, preparing sol, preparing xerogel and then carrying out calcinations so as to obtain the orange infrared reflective pigment; and (20) mixing: uniformly mixing the rest components, adding the orange infrared reflective pigment and carrying out grinding so as to obtain the infrared-reflective thermal-insulation coating.
Description
technical field [0001] The invention belongs to the technical field of infrared reflective heat-insulating coatings, in particular to an aluminum composite-based infrared reflective heat-insulating coating with high solar radiation reflectivity, good heat insulation performance and environmental friendliness and a preparation method thereof. Background technique [0002] There are mainly three types of thermal insulation coatings according to their characteristics and principles: insulating conductive thermal insulation coatings, reflective thermal insulation coatings and radiation thermal insulation coatings. Among them, the reflective thermal insulation coating is mainly composed of film-forming substances, infrared reflective pigments, solvents and additives, and its thermal insulation performance mainly depends on the reflectivity of infrared reflective pigments. Infrared reflective heat insulation coating is a new type of functional coating, which can enhance the reflec...
Claims
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IPC IPC(8): C09D133/00C09D5/33
CPCC08K2003/2241C08L2205/03C09D5/004C09D133/00C08L33/02C08L83/04C08K13/06C08K9/02C08K3/22C08K3/34C08K5/41
Inventor 韩爱军袁凛叶明泉陈昕陈星星姚凌云丁成
Owner NANJING UNIV OF SCI & TECH