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Preparation method of mica/TiO2/Al2O3/Co2O3 seven-layer structure angle-dependent different-color paint

A technology of different colors with different angles and layer structure, which is applied in the direction of inorganic pigment treatment, chemical instruments and methods, fibrous fillers, etc., and can solve the problems of complex preparation process, environmental pollution, and many coating layers

Inactive Publication Date: 2009-10-28
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has too many cladding layers, the preparation process is complicated, and because of the use of chromium solution, it will pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Weigh 3g of mica titanium with a mass fraction of titanium dioxide of 48% and put it into a reactor, add 57ml of deionized water, heat it with circulating water at 75°C, reflux, and adjust the pH value of the solution to about 9.0 with 5% sodium hydroxide. Add 1.5ml of 30% Al dropwise to the solution at a rate of 3 drops / min 2 (SO4) 3 solution, while adjusting the pH value of the solution with 5% sodium hydroxide to keep it around 7.5. Keep the reaction temperature constant, age for 40min, wash, filter, dry at 120°C for 1h, put it into a muffle furnace and roast at 900°C for 60min, heat out, and cool to room temperature naturally. Get powdered mica / TiO 2 / Al 2 o 3 Five-layer symmetrical structure floppy pigment. The prepared mica / TiO 2 / Al 2 o 3 Weigh 2g of the five-layer symmetrical structure angle-dependent color pigment, add 40ml of deionized water, heat it with circulating water at 74°C, reflux, adjust the pH value of the solution to about 10.0 with very dil...

Embodiment 2

[0010] Weigh 3g of mica titanium with a mass fraction of titanium dioxide of 48% and put it into a reactor, add 57ml of deionized water, heat it with circulating water at 75°C, reflux, and adjust the pH value of the solution to about 9.0 with 5% sodium hydroxide. Add 2ml of 30% Al dropwise to the solution at a rate of 3 drops / min 2 (SO4) 3 solution, while adjusting the pH value of the solution with 5% sodium hydroxide to keep it around 7.5. Keep the reaction temperature constant, age for 40min, wash, filter, dry at 120°C for 1h, put it into a muffle furnace and roast at 900°C for 60min, heat out, and cool to room temperature naturally. Get powdered mica / TiO 2 / Al 2 o 3 Five-layer symmetrical structure floppy pigment. The prepared mica / TiO 2 / Al 2 o 3 Weigh 2g of the five-layer symmetrical structure angle-dependent color pigment, add 40ml of deionized water, heat it with circulating water at 74°C, reflux, adjust the pH value of the solution to about 10.0 with very dilut...

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Abstract

The invention relates to a preparation method of mica / TiO2 / Al2O3 / Co2O3 series angle-dependent different-color paint. The method comprises the steps: preprocessed wondanite with different interference colors is used as a matrix material, aluminum hydroxide with a certain thickness is evenly deposited on the surface of the wondanite by adopting a wet chemistry method, the aluminum hydroxide is converted into aluminium oxide after being calcined so as to obtain the mica / TiO2 / Al2O3 angle-dependent different-color paint, then, cobalt hydroxide with a certain thickness is evenly deposited on a mica / TiO2 / Al2O3 surface by adopting the wet chemistry method, and the cobalt hydroxide is converted into Co2O3 after being calcined so as to obtain the angle-dependent different-color paint with various interconvertible colors, such as red to reddish yellow to green, and the like. The preparation method comprises the steps of preprocessing the matrix material, controlling the acidity and the basicity of a solution and selecting the digestion time, the reaction temperature and the sintering temperature. The angle-dependent different-color paint has simple preparation technology and low production cost and has no pollution. The paint has the advantages of nontoxicity, stable property, wide color change interval, and the like and is widely applied to the industries of cosmetic, printing ink, dope, building materials, and the like and the anti-fake labels of money, credentials, logos, valuable paper, and the like.

Description

technical field [0001] The present invention relates to mica / TiO 2 / Al 2 o 3 / Co 2 o 3 The preparation method of the seven-layer structure angle-dependent pigment. Background technique [0002] The angle-dependent pigment refers to the color of the pigment changes with the different viewing angles under the irradiation of light, or the color of the pigment changes accordingly when the viewing angle remains unchanged and the illumination angle of the light source is changed. This kind of pigment is widely used in industries such as cosmetics, inks, paints, building materials, and ceramics, as well as anti-counterfeiting marks such as currency, certificates, trademarks, and securities. [0003] According to the search, the methods for preparing the angle-variable pigments mainly include: (1) US Patents US4705300, US4705356, US5084351, etc. adopt the physical vapor deposition method, that is, the Fabry-Perot stacking method (FP method for short). The angle-dependent pigme...

Claims

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Application Information

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IPC IPC(8): C09C1/28C09C3/06
Inventor 孙家跃杜海燕刘彩霞张子印
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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