Method for preparing gold pearlescent pigment with high hue and high brightness

A pearlescent pigment and color concentration technology, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems that the surface is difficult to be smooth and affect the gloss effect of the coating layer, and achieve high temperature resistance The effect of high stability, high chemical stability, and high hiding power performance

Inactive Publication Date: 2011-07-20
GUANGDONG VOLOR PEARL PIGMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As a special effect pigment, pearlescent pigments are more and more widely used in the fields of coatings, inks, plastics, papermaking, leather, cosmetics, etc. The general-purpose pearlescent pigments use natural mica as the base material, so the base material cannot be used. To avoid the existence of different impurities, the surface is difficult to be smooth and smooth, which affects the gloss effect of the coating layer
The usual golden pearlescent pigment is coated with ferric oxide and titanium dioxide film on the surface of natural mica to produce a golden effect, but there are still some differences between this golden effect and the golden effect of real metallic gold, such as the appearance of the base color The color is reddish, not equal to the golden green of metallic gold

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] TiO with four-layer metal oxide structure 2 / Fe 2 o 3 *ZnO / TiO 2 / Al 2 o 3 *SnO 2 / Synthetic mica flakes / SnO 2 *Al 2 o 3 / TiO 2 / Fe 2 o 3 *ZnO / TiO 2 The structure of the example;

[0019] Weigh 60g of synthetic mica flakes with a particle size of 10-60 microns and add them to a beaker, add deionized water to form a suspension with a solid-to-liquid ratio of 1: (10-12), stir and heat in a constant temperature water bath. To 65°C, adjust the initial pH value to about 1.5 with 30% hydrochloric acid.

[0020] Feed and flow pump into the mixed solution 90ml of aluminum trichloride solution (concentration is 667g / L) and tin tetrachloride solution (concentration is 625g / L) with peristaltic constant flow pump feed, maintain reaction system pH value with 20% ammonia solution Stable, when the addition is complete, keep stirring at constant temperature for 30 minutes.

[0021] Raise the temperature to about 75°C, raise the pH value to 2.0, continue to pump 240ml of ...

Embodiment 2

[0028] TiO with a five-layer metal oxide structure 2 / Al 2 o 3 *SnO 2 / Fe 2 o 3 *ZnO / TiO 2 / Al 2 o 3 *SnO 2 / Synthetic mica flakes / SnO 2 *Al 2 o 3 / TiO 2 / Fe 2 o 3 *ZnO / Al 2 o 3 *SnO 2 / TiO 2 The structure of the example;

[0029] Weigh 60g of synthetic mica flakes with a particle size of 10-60 microns in dry weight and add them to a beaker, add deionized water at a solid-to-liquid ratio of 1: (10-12) to form a suspension, stir and heat in a constant temperature water bath. To 65°C, adjust the initial pH value to about 1.5 with 30% hydrochloric acid.

[0030] Feed and flow pump into the mixed solution 90ml of aluminum trichloride solution (concentration is 667g / L) and tin tetrachloride solution (concentration is 625g / L) with peristaltic constant flow pump feed, maintain reaction system pH value with 20% ammonia solution Stable, when the addition is complete, keep stirring at constant temperature for 30 minutes.

[0031] Raise the temperature to about 75°C,...

Embodiment 3

[0039] TiO with a five-layer metal oxide structure 2 / SnO 2 / Fe 2 o 3 *ZnO / TiO 2 / SnO 2 / Synthetic mica flakes / SnO 2 / TiO 2 / Fe 2 o 3 *ZnO / SnO 2 / TiO 2 The structure of the example;

[0040] Weigh 60g of synthetic mica flakes with a particle size of 10-100 microns in dry weight and add them to a beaker, add deionized water at a solid-to-liquid ratio of 1: (10-12) to form a suspension, stir and heat in a constant temperature water bath. To 65°C, adjust the initial pH value to about 1.5 with 30% hydrochloric acid.

[0041] Add 100ml of tin tetrachloride solution (concentration is 625g / L) with peristaltic constant flow pump feed and flow pump, keep the pH value of reaction system stable with 20% ammonia solution, after feeding is finished, keep stirring at constant temperature for 30 minutes.

[0042] Raise the temperature to about 75°C, raise the pH value to 2.0, continue to pump 180ml of 2mol / L titanium tetrachloride solution into the reaction system in parallel, an...

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Abstract

The invention discloses a method for preparing gold pearlescent pigment with high hue and high brightness, which comprises the following processes: coating multiple layers of iron and titanium oxide thin films on a substrate which is synthetic mica with a particle size of 10 to 60 micrometers or 10 to 100 micrometers in turn by using a hydrolysis process; and calcining the mica substrate coated with the films at a set temperature to convert the crystal form of the films by dehydration, so that the predesigned film interference effect is achieved. The gold pearlescent pigment manufactured by the method has the gold like metal luster lacking in common gold pigments, the metal luster of the gold pearlescent pigment can be as high as that of metal pigments such as copper gold powder and can realize high shielding performance, and when used in coating, the gold pearlescent pigment can produce a strong gold effect. Meanwhile, the gold pearlescent pigment has high temperature resistance, high chemical stability and high weather resistance.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic materials, in particular to a preparation method of a golden yellow pearlescent pigment with high color density and high brightness. Background technique [0002] In the past, golden pigments or gold powders were mostly brass alloys composed of copper, zinc and aluminum. Fire to eliminate internal stress, after dry ball milling, finally wind selection and classification, and polished surface treatment, this golden pigment has complicated processing technology, and is flammable and explosive. At the same time, it is not resistant to acid or alkali in application, and its weather resistance is extremely poor. , easy to oxidize and lose light and color. Therefore, in recent years, pearlescent pigments, which are safer and in line with the development trend of modern technology, have been widely promoted and used in the production process. [0003] As a special effect pigment, pearles...

Claims

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Application Information

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IPC IPC(8): C09C1/40C09C3/06B32B9/04B32B19/00
Inventor 侯清华李翔黄汝发陈俊
Owner GUANGDONG VOLOR PEARL PIGMENT
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