Non-floating type silicon dioxide coated waterborne aluminium paste and preparation method thereof

A technology of silica and aluminum silver paste, which is applied in chemical instruments and methods, pigment paste, inorganic pigment treatment, etc., can solve the problems of performance index and coating effect, and achieve the effect of white appearance

Inactive Publication Date: 2011-05-18
柴中南
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the past two or three years, my country's aluminum-silver paste products have also begun to use fine spherical aluminum powder as r

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] First use aluminum salt to adjust the potential of the surface of aluminum powder with a particle size of 5-50nm, so that the surface of aluminum powder is positively charged, and then generate negatively charged SiO2 colloid by dropping silicon alkoxide through hydrolysis reaction, which is evenly and densely adsorbed on the processed The surface of the positively charged aluminum powder regulated by the aluminum salt realizes the self-assembly of SiO2 colloids on the surface of the aluminum powder. The thickness of the silicon dioxide film coated on the surface of the aluminum powder is 1-4nm.

[0030] The surface of the aluminum powder is coated with a uniform, dense and transparent silicon dioxide film to obtain a silicon dioxide-coated water-based aluminum-silver paste.

[0031] In this embodiment, the change in particle size of the aluminum powder before and after coating the surface of the aluminum powder with a silicon dioxide film is less than 1 micron.

Embodiment 2

[0033] Except that the particle size of the aluminum powder is 5-20nm, and the thickness of the silicon dioxide film coated on the surface of the aluminum powder is 5-10nm, the non-leafing silicon dioxide coating of the present invention is obtained as in Example 1. Coated water-based aluminum silver paste.

Embodiment 3

[0035] Except that the particle size of the aluminum powder is 5-10nm, and the thickness of the silicon dioxide film coated on the surface of the aluminum powder is 5-8nm, the non-leafing silicon dioxide coating of the present invention is obtained as in Example 1. Coated water-based aluminum silver paste.

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Abstract

The invention provides non-floating type silicon dioxide coated waterborne aluminium paste and a preparation method thereof. The non-floating type silicon dioxide coated waterborne aluminium paste is characterized in that the aluminium paste is self-assembled silicon dioxide colloidal particles; SiO2 colloids with negative electricity are evenly and compactly absorbed on the front surface of aluminium powder with positive electricity; the particle size of the aluminium powder with positive electricity is 5-50nm; and the thickness of the silicon dioxide film coated on the aluminium powder surface is 1-10nm. The non-floating type aluminium paste has various types, the tinting strength of the non-floating type aluminium paste is increased from low to high, the grain size of the non-floating type aluminium paste is reduced from thick to thin, and the appearance of the non-floating type aluminium paste is from white, bright to darker and is more and more finer; and in addition, a series of acid-resisting products can reduce influences of industrial smog, acid rain and other adverse environments on paints.

Description

technical field [0001] The present invention relates to a metal paint and its manufacturing method, specifically, the present invention relates to an aluminum silver medal and its manufacturing method, more specifically, the present invention relates to a non-leafing silica-coated water-based aluminum silver paste and its preparation method. Background technique [0002] Metallic and pearl-colored paints are being applied to more and more cars as they address the need for more aesthetically pleasing and attractive automotive colors. According to statistics, in European and American countries, pearl-colored cars account for about 20%, metallic-colored cars account for about 50%, while traditional plain-colored cars only account for about 30%. In my country, metallic paint and pearlescent paint are only partially used in cars, accounting for less than 30%. In the next few years, metallic and pearl-colored cars in domestic cars will increase rapidly. [0003] Metallic flash p...

Claims

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Application Information

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IPC IPC(8): C09D17/00C09C1/64C09C3/06
Inventor 柴中南
Owner 柴中南
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