Doping pearlescent pigment and preparation thereof

A technology of pearlescent pigments and pigments, which is applied in the field of doped pearlescent pigments and its preparation, which can solve the problems such as the decrease of covering rate, and achieve the effects of reducing the number of refractions, improving color and sparkle, and soft luster

Inactive Publication Date: 2009-01-21
SUZHOU TAIZHU TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the hiding rate of this pigment has obviously dropped

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] ①Suspend 100g of glass flakes (glass flakes with a particle size of 50-180μm) in 1000ml of deionized water, stir to form a uniformly dispersed suspension, then heat the suspension to 75°C, and adjust the pH value of the suspension with dilute hydrochloric acid Adjust to 1.6, then add the SnCl with a concentration of 4.8% by weight 4 .5H 2 O solution 40ml, and add 10% NaOH solution to keep the pH value of the suspension constant, and stir at constant temperature for 20 minutes after the addition is complete.

[0031] 2. Adjust the pH value of the suspension to 2.6 with 10% NaOH solution, and then meter the TiCl with a concentration of 10% (weight). 4 Solution 183ml, and concentration is the ZnCl of 5% (weight) 2 Solution 22ml and concentration are 5% (weight) CaCl 2 The mixed solution that solution 20ml is formed, and add 10% (weight) NaOH solution and keep the pH value of suspension constant, after adding, add the NaOH solution of 10% concentration again, the pH valu...

Embodiment 2

[0035] Same as Example 1, only step ② is modified to:

[0036] The pH of the suspension was adjusted to 2.0 with 10% NaOH solution, and TiCl was then metered in at a concentration of 10% by weight 4 Solution 310ml and 10% by weight FeCl 3 Solution 15ml mixed solution, and metered into 10% NaOH solution, to maintain the pH value of the suspension constant. After the addition, 10% NaOH solution was added to increase the pH value of the suspension to 5.0, and then stirred at constant temperature for 20 minutes.

[0037] This gives a pearlescent pigment with an intensely shimmering reddish-orange luster effect.

Embodiment 3

[0039] Same as Example 1, only step ② is modified to:

[0040] The pH value of the suspension was adjusted to 2.6 with 10% NaOH solution, and then metered in from 10% (weight) TiCl 4 The NiCl of solution 410ml and 5% (weight) concentration 2 .6H2O solution 20ml and 5% (weight) concentration of CoCl 2 .6H 2 O solution 20ml mixed solution, and metered into 10% concentration NaOH solution to maintain the suspension pH value constant. After the addition, 10% NaOH solution was added to raise the pH value of the suspension to 10.0, and stirred at constant temperature for 20 minutes.

[0041] In this way, a kind of pearlescent pigment with strong flashing blue-green luster effect is obtained, and the hiding rate of the pigment is also good.

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Abstract

The invention discloses a doped pearlescent pigment and a preparation method thereof. The pigment uses a glass flake as a substrate; the surface of the glass flake is coated with a SiO2 or SnO2 coating; the surface of the SiO2 or SnO2 coating is coated with a doped metallic oxide coating; the doped metallic oxide coating is a coating of metallic oxide doped with at least one metallic element compound, nonmetallic element compound or the combination of the two. The glass flake after SiO2 or SnO2 coating treatment is directly coated with the doped metallic oxide coating and then calcined once so as to form the doped pearlescent pigment. The invention relates to the pearlescent pigment containing the doped metallic oxide coating. By doping the metallic oxide with different metallic element compounds and/or nonmetallic compounds, the color and glossiness of the doped pigment are adjusted; therefore, both a high-glossiness colorful twinkling effect and a soft-glossiness effect can be obtained. Moreover, the pearlescent pigment has good hiding rate as well.

Description

technical field [0001] The invention relates to a pearlescent pigment, in particular to a doped pearlescent pigment with a glass flake as a substrate and a preparation method thereof. Background technique [0002] When the mica sheet is used as the substrate and the surface is coated with a metal oxide coating alone, the pearlescent pigment formed is called a single-layer coated pearlescent pigment. Among them, the mica titanium pearlescent pigment coated with titanium dioxide is usually silvery white. As the thickness of the coating increases, due to the reflection and transmission of light, light interference will occur between several beams of parallel reflected light, and a series of The colors of interference light mainly include gold, red, purple, blue, green and other colors. When the mica is coated with iron oxide alone, the mica iron pearlescent pigment will be formed. With the increase of the coating thickness, due to the light reflection and light absorption, it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/40
Inventor 林一中金文松
Owner SUZHOU TAIZHU TECH DEV
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