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Water-based aluminum paste and preparation method thereof

A kind of aluminum paste, water-based technology, applied in chemical instruments and methods, inorganic pigment treatment, dyeing organosilicon compound treatment, etc., can solve the problems of water-based paints that are not easy to disperse, dark colors, etc., and achieve good acid and alkali resistance and good dispersibility Effect

Active Publication Date: 2012-09-12
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

[0003] The purpose of the present invention is to provide a water-based aluminum paste and its preparation method to solve the technical problems that the oil-based aluminum paste is not easy to disperse and the color is dark when used in water-based paints.

Method used

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Examples

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preparation example Construction

[0018] The present invention provides a method for preparing water-based aluminum paste, which can obtain water-based aluminum paste that can be well dispersed in water-based paint after washing and silicon coating of oily aluminum paste that is commercially available or obtained by the prior art. The method is simple to operate, the surface of the obtained aluminum paste is evenly coated with silicon, and 1 kg of the obtained aqueous aluminum paste is made into a water-based paint, which can be placed in a water bath at 50° C. for 7 days, and only 15 ml of gas is generated.

[0019] The silicon coating step includes the following steps:

[0020] 1) Put 100~150 parts by weight of absolute ethanol and 5~15 parts by weight of ethyl orthosilicate into the washed oily aluminum paste, raise the temperature to 40~60°C, stir and react for 10~30 minutes;

[0021] 2) Add 10-15 parts by weight of ethylenediamine and 10-20 parts by weight of deionized water, and stir and react for 1 to 2 hours;...

Embodiment 1

[0037] 1) Take 100 parts by weight of oily aluminum paste (D 50 =7um, the solid content is 65%). Wash them three times with absolute ethanol (100 parts by weight of absolute ethanol each time) to obtain a slurry containing absolute ethanol). Put the slurry into the reaction kettle, add 100 parts by weight of natural ethanol and 7 parts by weight of orthosilicate ethanol to the reaction kettle, increase the temperature to 45°C and keep it at this temperature, and stir for 15 minutes;

[0038] 2) Add 7 parts by weight of ethylenediamine and 12 parts by weight of deionized water and keep stirring for 1 hour;

[0039] 3) Add 7 parts by weight of silane coupling agent and stir for 45 minutes;

[0040] 4) Slowly add 4 parts by weight of simethicone under stirring, and keep stirring for 1 hour;

[0041] 5) Stop heating and heat preservation, and let it cool down naturally while stirring to bring the temperature down to room temperature (20~30℃); screen the materials in the reactor with a 32...

Embodiment 2

[0049] 1) Take 120 parts by weight of oily aluminum paste (D50=17um, solid content is 70%). They were washed three times with absolute ethanol (150 parts by weight of absolute ethanol each time) to obtain a slurry containing absolute ethanol. Then put the slurry into the reaction kettle, add 120 parts by weight of tianshui ethanol and 10 parts by weight of orthosilicate ethanol into the reaction kettle, raise the temperature to 48°C, and stir for 15 minutes;

[0050] 2) Add 10 parts by weight of ethylenediamine and 16 parts by weight of deionized water, keep stirring for 1 hour;

[0051] 3) Add 10 parts by weight of silane coupling agent and stir for 1.5 hours;

[0052] 4) Slowly add 5 parts by weight of dimethyl silicone oil and continue to stir for 60 minutes;

[0053] 5) Stop heating and heat preservation, and let it cool down naturally while stirring to bring the temperature down to room temperature (20~30°C); then sieve the materials in the reactor with a 325-mesh sieve to scree...

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Abstract

The invention provides a water-based aluminum paste and a preparation method thereof. The method comprises the following steps of: washing oily aluminum paste; coating the washed oily aluminum paste by using silicon compounds, namely 1) throwing 100 to 150 weight parts of absolute ethanol and 5 to 15 weight parts of tetraethoxysilane into the washed oily aluminum paste, heating to 40 to 60 DEG C, and reacting with stirring for 10 to 30 minutes; 2) adding 10 to 15 weight parts of ethanediamine and 10 to 20 weight parts of deionized water, and reacting with stirring for 1 to 2 hours; 3) adding 5 to 15 weight parts of silane coupling agent, and reacting with stirring for 30 to 60 minutes; and 4) slowly adding 2 to 5 weight parts of dimethicone with stirring, and continuously reacting with stirring for 1 to 2 hours. The water-based aluminum paste which is wrapped by the silicon compounds is high in dispersibility in an aqueous solution or water-based paint, does not have chemical reaction with water, can keep the inherent metal color of aluminum powder and is high in acid and alkaline resistance property.

Description

Technical field [0001] The present invention relates to the field of water-based aluminum paste, in particular, to a method for preparing water-based aluminum paste. In addition, the present invention also relates to the aqueous aluminum paste prepared by the above method. Background technique [0002] Aluminum paste is a kind of metallic pigment that is ground by mixing spherical aluminum powder with organic solvents and additives. The aluminum powder produced in the prior art is mostly oily. When oily aluminum powder is put into water-based paint, not only can it not be dispersed, but also because aluminum and water will react to produce other substances, the resulting paint has poor performance and gray color. In order to prepare aluminum paste with good dispersibility in water, the commonly used method is to prepare it by silicon coating. However, the water-dispersibility of the water-based aluminum paste obtained by this method is still poor. Therefore, people continue t...

Claims

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Application Information

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IPC IPC(8): C09C1/64C09C3/06C09C3/08C09C3/12
Inventor 梁晓斌赵守元
Owner 长沙族兴新材料股份有限公司
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