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A kind of preparation method of colored water-based aluminum powder pigment coated with iron oxide

An iron oxide and coating technology, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of rough surface, unfavorable dispersion, corrosion of aluminum powder, etc., and achieve low gloss and good corrosion resistance performance, the effect of preventing self-aggregation

Active Publication Date: 2019-04-16
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing aluminum powder pigments are easy to react with water in alkaline water-based acrylic paints, which may cause the aluminum powder to be corroded and the surface roughened, which is not conducive to its dispersion in the paint. Especially in the case of high temperature and high acidity and alkalinity, there is a danger of explosion

Method used

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  • A kind of preparation method of colored water-based aluminum powder pigment coated with iron oxide
  • A kind of preparation method of colored water-based aluminum powder pigment coated with iron oxide
  • A kind of preparation method of colored water-based aluminum powder pigment coated with iron oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 20g of aluminum silver paste and 40mL of isopropanol into the reactor, stir at 45°C for 1h, then add 11mL of 5.0wt% H at a constant speed within 1h 2 o 2 aqueous solution, and then add 25mL ferrous chloride aqueous solution (the mass of ferrous chloride in the solution is 6.61g) dropwise at a constant speed within 3h, and at the same time dropwise add diluted ammonia water to control the pH of the reaction system to 4.20, continue to Stir for 3 hours and filter to obtain a colored water-based aluminum powder coated with iron oxide.

Embodiment 2

[0023] Add 20g of aluminum silver paste and 40mL of isopropanol into the reactor, stir at 45°C for 1h, then add 11mL of 6.5wt% H at a constant speed within 1h 2 o 2 aqueous solution, and then add 25mL of mixed salt solution (Fe 3+ : Fe 2+ Molar ratio 1:10), and at the same time, drop diluted ammonia water to control the pH of the reaction system to 4.65, continue to stir for 3 hours after the dropwise addition, and filter to obtain a colored water-based aluminum powder coated with iron oxide.

Embodiment 3

[0025] Add 20g of aluminum silver paste and 40mL of isopropanol into the reactor, stir at 45°C for 1h, then add 11mL of 5.0wt% H at a constant speed within 1h 2 o 2 aqueous solution, and then add 25mL of mixed salt solution (Fe 3+ : Fe 2+ molar ratio 1:13), and at the same time, drop diluted ammonia water to control the pH of the reaction system to 4.41, continue to stir for 3 hours after the dropwise addition, and filter to obtain the iron oxide-coated colored water-based aluminum powder pigment.

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Abstract

The invention provides a preparation method for a ferric oxide-coated colored waterborne aluminum powder pigment. The preparation method comprises the following steps: adding aluminum paste and isopropanol into a reaction container and carrying out stirring at 40 to 50 DEG C for 0.5 to 2 h; adding an aqueous H2O2 solution with a mass fraction of 5.0 to 8.0% drop by drop at a constant speed; then adding an aqueous solution of a mixed salt of Fe<3+> and Fe<2+> drop by drop at a constant speed within 3 to 6 h and adding diluted ammonia water drop by drop to control the pH value of a reaction system to be 4.4 to 5.4; and continuing stirring for 3 to 6 h and carrying out filtering so as to obtain the ferric oxide-coated colored waterborne aluminum powder pigment, wherein the diluted ammonia water is prepared from isopropanol, water and 25% ammonia water in a volume ratio of 4.6: 2: 1. The aluminum powder pigment prepared by using the method is low in glossiness, has a grayish green to khaki color, improves the anticorrosion performance of flaky aluminum powder, overcomes the disadvantage of difficulty of the flaky aluminum powder in achieving invisibility in visible light, and is extensively applicable to fields like waterborne paint or waterborne camouflage paint.

Description

technical field [0001] The invention relates to a preparation method of aluminum powder pigment, in particular to a preparation method of iron oxide-coated colored water-based aluminum powder pigment. Background technique [0002] Aluminum powder pigment is an important metal powder pigment, which is mostly scaly and smooth. It can form a flat, dense and bright aluminum film when spread on the object to be coated. Compared with other pigments, aluminum powder pigments have unique covering, shielding, floating and other characteristics, and show metallic luster effect and color-dependent effect, and the coating made of aluminum powder pigments has a low emissivity, which is an infrared One of the important pigments in stealth paint. However, the high reflectivity of aluminum powder enhances the reflection ability of radar waves, visible light and laser, and increases its display effect in these bands. It is not suitable for camouflage materials in these bands, which limits t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/64C09C3/06
CPCC01P2006/62C01P2006/63C01P2006/64C09C1/642C09C3/063
Inventor 马志领王献玲温雅静张春燕
Owner HEBEI UNIVERSITY
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