High brightness waterborne aluminum pigment and preparation method thereof

An aluminum pigment, high brightness technology, applied in the direction of inorganic pigment treatment, chemical instruments and methods, fibrous fillers, etc., can solve the problems of high VOCs content, waste of solvent, high cost, etc., achieve low VOCs content, save costs, and shorten the production cycle The effect of shortening

Inactive Publication Date: 2018-03-16
安徽天易金属新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a high-brightness water-based aluminum pigment and a preparation method thereof. The water-based aluminum pigment solves the defects of traditional water-based aluminum pigments such as waste of solvent, high cost, low brightness and high VOCs content. put forward improvement measures

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  • High brightness waterborne aluminum pigment and preparation method thereof

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preparation example Construction

[0023] The invention provides a high-brightness water-based aluminum pigment and a preparation method thereof, the method comprising the following steps:

[0024] a. Add 40-80kg spherical aluminum powder, 200-400L alcohol, ether solvent and 2-5L additives to a ball mill for ball milling to remove the oxide layer on the surface of the spherical aluminum powder and flake the spherical aluminum powder into flakes Aluminum particles I. The particle size of the spherical aluminum powder used is 5-30 μm, and the aluminum content is above 99%; the alcohol and ether solvent used are selected from ethanol, n-propanol, isopropanol, n-butanol, isobutanol, propylene glycol methyl ether , one or more of dipropylene glycol methyl ether, ethylene glycol monobutyl ether; the auxiliary agent used is selected from polyethylene glycol 200, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 1000, Polyethylene glycol 1500, polyethylene glycol 2000, dioctadecyl pentaerythritol b...

Embodiment 1

[0031] a. Add 40kg of spherical aluminum powder, 200L of alcohol, ether solvent and 2L of additives into a ball mill for ball milling to remove the oxide layer on the surface of the spherical aluminum powder and flake the spherical aluminum powder to obtain flake aluminum particles I. The spherical aluminum powder used has a particle size of 5 μm and an aluminum content of 99.5%; the alcohol and ether solvents used are a mixed solvent of n-butanol and propylene glycol methyl ether; the auxiliary agent used is dioctadecyl pentaerythritol diphosphite ester.

[0032] b. Add 0.2 kg of silane coupling agent, 7 kg of tetraethyl orthosilicate, water and 0.01 kg of pH regulator to the slurry of flake aluminum particles I, and then continue ball milling to obtain a mixture of flake aluminum particles II and solvent . Control the parameters of the ball mill so that the diameter-thickness ratio of the obtained flake aluminum particles I is 30, and the diameter-thickness ratio of the fla...

Embodiment 2

[0036] a. Add 60kg of spherical aluminum powder, 300L of alcohol, ether solvent and 4L of additives into a ball mill for ball milling to remove the oxide layer on the surface of the spherical aluminum powder and flake the spherical aluminum powder to obtain flake aluminum particles I. The particle size of the spherical aluminum powder used is 15 μm, and the aluminum content is 99.5%; the used alcohol and ether solvent is a mixed solvent of n-propanol and dipropylene glycol methyl ether; the used auxiliary agent is polyethylene glycol 2000.

[0037] b. Add 0.3kg of silane coupling agent, 10kg of tetraethyl orthosilicate, water and 0.04kg of pH regulator to the slurry of flake aluminum particles I, and then continue ball milling to obtain a mixture of flake aluminum particles II and solvent . Control the parameters of the ball mill so that the diameter-thickness ratio of the obtained flake aluminum particles I is 50, and the diameter-thickness ratio of flake aluminum particles I...

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Abstract

The invention discloses a preparation method of a high brightness waterborne aluminum pigment. The method includes the steps of: adding spherical aluminum powder, an alcohol and ether solvent, and anassistant into a ball mill for ball milling, removing an oxide layer from the surface of the spherical aluminum powder, and flaking the spherical aluminum powder to obtain flake aluminum particles I;adding a silane coupling agent, tetraethyl orthosilicate, water and a PH regulator into a slurry of the flake aluminum particles I, and then further performing ball milling to obtain a mixture of flake aluminum particles II and a solvent; pumping the mixture of the flake aluminum particles II and the solvent out into a container, and conducting heat preservation for 6-12h at 50-60DEG C; and carrying out solid-liquid separation on the heat preserved mixture of the flake aluminum particles II and the solvent. The pigment and the preparation method provided by the invention have the advantages that the product has no need for solvent replacement, the waterborne aluminum pigment can be prepared at a time, the preparation process is simple, saves cost, and avoids solvent wasting; the product has very low VOCs content, and meets the environmental protection requirements; the time of flake aluminum particle exposure during solvent replacement is saved, and the waterborne aluminum pigment hasgood brightness.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a high-brightness water-based aluminum pigment and a preparation method thereof. Background technique [0002] In the prior art, most water-based aluminum pigments are obtained through solvent replacement, surface modification and coating treatment on the basis of oily aluminum pigments. It has the following defects: ①Solvent replacement causes a large amount of solvent waste, increases costs and wastes time; ②The original grease coating is removed during the solvent replacement process before coating, which will cause the aluminum sheet to be exposed for a period of time, and it is easy to be exposed by water vapor. Corrosion with weak acid and alkali in the solvent, resulting in a decrease in brightness after coating; ③Solvent replacement is difficult to replace completely, and the residual solvent not only affects the coating effect but also increases the VOCs (volatile organi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/64C09C3/04C09C3/12
CPCC09C1/646C01P2004/20C09C3/006C09C3/041C09C3/12
Inventor 谷圣军董前年周辉李凡朱双单陈国庆
Owner 安徽天易金属新材料有限公司
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