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Coated modified aluminum powder pigment, and preparation method and use thereof

An aluminum powder and modification technology, applied in inorganic pigment processing, chemical instruments and methods, applications, etc., can solve the problems of aluminum powder pigments losing metallic luster, easy to fall off, and difficult to disperse aluminum powder pigments, and achieve excellent storage stability. , not easy to agglomerate, good compatibility effect

Active Publication Date: 2015-09-09
CHANGDE JINPENG PRINTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order for aluminum powder pigments to be used in water-based media (weak acid or weak alkali), the first problem that needs to be solved is: aluminum powder is easily corroded and reacts with the medium, which not only makes the aluminum powder pigment lose its metallic luster, but also produces Hydrogen, there is a danger of explosion; the second problem that needs to be solved is: aluminum powder pigments are difficult to disperse in water-based resins, and the compatibility between the two is poor, resulting in agglomeration of aluminum powder pigments and a decrease in gloss, which is not conducive to subsequent use
This method belongs to the in-situ polymerization method, the research and development of aluminum pigment surface modification and anticorrosion technology, the Chinese Journal of Corrosion and Protection, Volume 34, Issue 5 mentioned that in this method, the adsorption driving force of the initiator ammonium persulfate on the aluminum surface It is not chemical bonding, but electrostatic attraction, which is easier to fall off

Method used

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  • Coated modified aluminum powder pigment, and preparation method and use thereof
  • Coated modified aluminum powder pigment, and preparation method and use thereof
  • Coated modified aluminum powder pigment, and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] In terms of parts by mass (the same as below), add 1 part of aluminum powder coated with silica and 30 parts of toluene into the reactor, stir with nitrogen at room temperature, and add 0.01 part of 4,4'- Azo (4-cyanovaleric acid (3'-dimethylchlorosilane) propyl ester) and 0.1 part of triethylamine were stirred and reacted at room temperature for 12 hours, then washed with ethanol, and filtered to obtain a coated modified aluminum powder pigment.

[0059] Corrosion resistance of the coated modified aluminum powder pigment in Example 1: No hydrogen gas is precipitated in the aqueous solution in the range of pH 8-12 for 6 months.

[0060] Glossiness of the coated modified aluminum powder pigment in Example 1: after the water-based paint is cured, the surface is silver, the color is uniform, the gloss is good, and there is no flow mark.

[0061] The dispersibility of the coated modified aluminum powder pigment in this example 1: put the water-based aluminum powder pigm...

Embodiment 2

[0064] The first step: in parts by mass, add 1 part of aluminum powder coated with silica and 30 parts of toluene into the reactor, stir with nitrogen at room temperature; add 0.02 parts of 4,4'-azo ( 4-cyanovaleric acid (3'-dimethylchlorosilane) propyl ester) and 0.2 parts of triethylamine, stirred at room temperature for 12 hours; then washed with isopropanol, filtered to obtain coated modified aluminum powder pigment.

[0065] The second step: Add 1 part of coated modified aluminum powder pigment, 30 parts of methanol and 1 part of methyl acrylate into the reactor; deoxygenate the reactor under liquid nitrogen conditions, and then react in a water bath at 70 ° C for 3 hours; After filtering, washing and drying, the water-based aluminum powder pigment is obtained.

[0066] The corrosion resistance of the water-based aluminum powder pigment of the present embodiment 2: no hydrogen gas is separated out in 6 months in the aqueous solution in the range of pH8-12.

[0067] G...

Embodiment 3

[0071] The first step: in parts by mass, add 2 parts of aluminum powder coated with silica and 40 parts of toluene into the reactor, and stir with nitrogen at room temperature; add 0.05 parts of 4,4'-azo ( 4-cyanovaleric acid (3'-dimethylchlorosilane) propyl ester) and 0.2 parts of triethylamine, stirred and reacted at room temperature for 20 hours; then washed with methanol, filtered to obtain coated modified aluminum powder pigment.

[0072] The second step: add 2 parts of coated modified aluminum powder pigments, 40 parts of methanol and 1 part of methyl methacrylate into the reactor; deoxygenate the reactor under liquid nitrogen conditions, and then react in a water bath at 60 °C for 3 hours; filtered, washed, and dried to obtain water-based aluminum powder pigments.

[0073] The corrosion resistance of the water-based aluminum powder pigment of the present embodiment 3: there is no hydrogen gas precipitation in the aqueous solution in the pH8-12 range for 6 months. ...

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Abstract

The invention relates to a coated modified aluminum powder pigment, and a preparation method and a use thereof; a surface coating layer of the coated modified aluminum powder pigment is silicon dioxide, the interior is an aluminum powder, the exterior of the surface coating layer is connected with a connection point through a chemical bond, and the connection point is 4,4'-azo(4-cyanovaleric acid(3'-dimethylchlorosilane)propyl ester), 4-azoisobutyl cyano 4-cyano(valeric acid(3'-dimethylchlorosilane)propyl ester) or azoisobutyl dicyano phenyl(3-ethyldimethylchlorosilane); the connection point is firmly fixed on the surface of silicon dioxide and has a quite good protective effect on the internal aluminum powder, and the coated modified aluminum powder pigment has quite good dispersibility in waterborne coatings and printing inks.

Description

technical field [0001] The invention relates to the technical field of surface treatment of metal pigments, in particular to a coated modified aluminum powder pigment, a preparation method and an application. Background technique [0002] Aluminum powder pigment is one of the most common metallic pigments, and is favored by designers for its unique sparkle, covering and decorative effects. Its consumption has grown rapidly since the last century, and in recent decades it has developed towards high added value and water-phase adaptability. The main application areas are industrial coatings, automotive coatings, decoration, printing inks, plastic processing, etc. [0003] Traditional aluminum powder pigments are all solvent-based aluminum powders, and the solvent-based products formulated with them contain relatively high organic volatiles, are difficult to clean, and are harmful to the environment and human body. With the continuous development of science and technology, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/64C09C3/06C09C3/12C09C3/10C09D7/12C09D11/00
Inventor 孔繁辉黎厚斌徐军何宇航刘兴海唐娇刘麒
Owner CHANGDE JINPENG PRINTING
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