Low infrared emittance chocolate brown sheet-like pigment and method for preparing same

A low-emissivity, tan technology, applied in fibrous fillers, inorganic pigment processing, chemical instruments and methods, etc., can solve problems such as changing the metallic luster and color of aluminum powder

Inactive Publication Date: 2006-12-27
SHANGHAI HUAMING HI TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Coating dense ferric oxide chemical coating on the surface of flake aluminum powder, on the one hand, solves the oxidation problem of metal aluminum on the surface of metal aluminum powder, on the other hand, changes the metallic luster and color of aluminum powder due to surface iron oxide

Method used

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  • Low infrared emittance chocolate brown sheet-like pigment and method for preparing same

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Weigh 13.9g FeSO 4 ·7H 2 O, dissolved in water and diluted to 1L, weighed 6g NaOH dissolved in water and diluted to 500ml for subsequent use;

[0028] Take 300ml FeSO 4 The solution was poured into a 2L reaction kettle, and then 7g of flake aluminum powder with an average particle size of 29μm was added, stirred, and the reaction kettle was heated with a hot water jacket; when the temperature rose to the set temperature of 70°C, 113ml of NaOH solution was added. Then use a metering pump to control the drop rate of the ferrous salt solution and NaOH solution, so that the pH value of the reaction solution remains at 8; feed air with an air compressor at the same time, and the air flow control is 50ml / min; when the ferrous salt solution drops 15 minutes after the end of the addition, measure the Fe in the sample with potassium dichromate titration 2+ The concentration of Fe 2+ When the concentration is less than 0.003mol / L, stop feeding air. Suction filtration, washin...

Embodiment 2

[0030] Weigh 69.5gFeSO 4 ·7H 2 O, dissolved in water and diluted to 1L, the preparation concentration is 500ml of ammonia solution of 1.5mol / L for subsequent use; 400ml of FeSO 4 Pour the solution into a 2L reaction kettle, then put in 30g of flake aluminum powder with an average particle size of 40μm, stir, and heat the reaction kettle with jacketed steam; when the temperature rises to the set temperature of 95°C, add 151ml of ammonia solution, and then Control the dropping speed of the ferrous salt solution and ammonia water, so that the pH value of the reaction solution is kept at 14; at the same time, use an air compressor to feed air, and the air flow rate is controlled at 50ml / min; 20 minutes after the ferrous salt solution is added dropwise , with potassium dichromate titration to measure the Fe in the sample 2+ The concentration of Fe 2+ When the concentration is less than 0.003mol / L, stop feeding air. Suction filtration, washing, and drying at 120° C. to obtain ab...

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Abstract

The invention discloses the aluminum dust dye and preparing method. The dye has emissing ability, and is covered with ferriferrous oxide. The particle mean size of aluminum dust is 1-100 mum, and the aluminum dust is lack-lustre, sepia, and good oxidation resistance. The average emissing ability of infrared band is 0.50-0.65.

Description

technical field [0001] The invention relates to a brown flake pigment and a preparation method thereof, in particular to a brown flake pigment with low infrared emissivity and a preparation method thereof. Background technique [0002] Infrared stealth technology is an infrared target control technology developed for infrared imaging, infrared guidance and infrared reconnaissance. Infrared stealth material is a high-tech military material that emerged in the middle and late 20th century. It is used to make infrared stealth coatings or infrared camouflage stealth barriers with different infrared emissivity, which can be used for military targets to achieve stealth. [0003] Optical studies have shown that the higher the reflectivity of opaque objects, the lower the emissivity, so metals with higher reflectivity are the most important pigment types in infrared stealth paints. In fact, the most widely used is metal aluminum powder with excellent performance and low price. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/06C09C1/40
Inventor 吴秋芳李福清马新胜於定华汪中进
Owner SHANGHAI HUAMING HI TECH GRP
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