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Aluminum powder pigment and preparation method thereof

A technology of aluminum powder and pigment, which is applied in the field of aluminum powder pigment and its manufacture, and can solve problems such as poor particle size, poor white brightness, poor dispersibility of aluminum silver powder, etc.

Active Publication Date: 2011-02-16
长沙族兴新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the aluminum silver powder made by the current "wet method" has poor dispersibility when used, poor whiteness, poor hiding power, poor particle size, and poor flatness after being made into paint or ink.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] An aluminum powder pigment of the present invention comprises 90 parts by weight of aluminum powder and 9 parts by weight of fumed silica.

[0035] Fumed silica can withstand high temperature. It is not a dispersant in the traditional sense, but it can play an unexpected role in dispersion in aluminum powder because of its fineness and high temperature resistance. Adding fumed silica to the aluminum powder pigment can make the aluminum powder pigment have good dispersibility, high flatness and easy electrostatic spraying process.

[0036] In the specific implementation of the aluminum powder pigment of the present invention, the weight parts of the above-mentioned aluminum powder and fumed silica are allowed to have a fluctuation of ±1 weight part.

Embodiment 2

[0038] An aluminum powder pigment of the present invention comprises 91 parts by weight of aluminum powder, 8 parts by weight of fumed silica and 1 part by weight of methyl propionate.

[0039] Described methyl propionate can also be other low-boiling point organic solvents, such as ethyl propionate etc.

Embodiment 3

[0041] A kind of method of manufacturing aluminum powder pigment of the present invention, comprises the following steps:

[0042] (1) Place the ball mill after mixing the fine aluminum powder of 90 parts by weight with the high-boiling point organic solvent;

[0043] (2) sieving and pressing to make aluminum slurry filter cake;

[0044] (3) Add 9 parts by weight of fumed silica in the filter cake, stir evenly;

[0045] (4) filter cake is dried;

[0046] (5) Sieve into aluminum powder pigment.

[0047] Ordinary dispersants may run away during drying, which will not work, or will melt, and will condense after cooling, making the aluminum flakes agglomerate, and then will not work; add fumed silica to the filter cake (diameter less than 1um) As a dispersant, fumed silica can withstand high temperatures. It is not a dispersant in the traditional sense, but it can play an unexpected role in dispersion in aluminum silver powder because of its fineness and high temperature resist...

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Abstract

The invention relates to an aluminum powder pigment which comprises the following components of 90 plus or minus 1 part of aluminum powder and 9 plus or minus 1 part of fumed silica according to the parts by weight. After the fumed silica is added in the aluminum powder pigment, the aluminum powder pigment has good dispersibility and high flatness, and the electrostatic spraying process is easilyimplemented. The invention also provides a preparation method for the aluminum powder pigment.

Description

technical field [0001] The invention relates to a metallic pigment, in particular to an aluminum powder pigment and a manufacturing method thereof. Background technique [0002] Aluminum is a silver-gray metal with a relative mass of 26.98, a relative density of 2.55, and a purity of 99.5%. The melting point of aluminum is 685°C, the boiling point is 2065°C, and the latent heat of fusion is 323kJ / g. hot. During rapid oxidation, the heat release per gram is 15.5kJ / g. Aluminum is a ductile metal and easy to process. The oxide film on the surface of metal aluminum is transparent and has good chemical stability. [0003] Aluminum powder for pigments refers to the aluminum powder whose particles are in the shape of scales, the surface is coated with a treatment agent, and is suitable for use as a pigment. Compared with other pigments, aluminum powder for pigments has more characteristics, which are manifested in the following aspects: [0004] 1. The characteristics of scaly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C3/06C09C1/64
Inventor 梁晓斌
Owner 长沙族兴新材料股份有限公司
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