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A kind of conductive pearlescent pigment with high refractive index and preparation method thereof

A technology of pearlescent pigments and high refractive index, which is applied in the direction of inorganic pigment treatment, chemical instruments and methods, fibrous fillers, etc., and can solve the problem of pigment luster decline and other problems

Active Publication Date: 2020-03-20
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Another object of the present invention is to increase the refractive index of the conductive pearlescent pigment by phase inversion without affecting the conductive properties of the precursor, so as to improve the brightness of the conductive pearlescent pigment, thereby improving the decline in the gloss of the pigment due to coating. question

Method used

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  • A kind of conductive pearlescent pigment with high refractive index and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Take 10g of bismuth oxychloride pearlescent pigment with a particle size of 12 μm and add 200ml of deionized water into a 1000ml four-neck round bottom flask, start stirring and heating to obtain pearlescent powder slurry, adjust the pH value with 2mol / L sodium hydroxide solution Adjust to 9-9.5, and finally control the reaction temperature to 70°C;

[0025] (2) Take 49ml of 50g / L sodium metavanadate solution and 70.5ml of 20g / L sodium metaaluminate solution, and then add 16.03ml of hydrochloric acid with a concentration of 2mol / L to the above-mentioned pearl powder at a uniform speed while stirring In the slurry, the reaction temperature and pH should be kept constant during this process, and the stirring should be continued for 1 hour after the dropwise addition to obtain the precipitated precursor;

[0026] (3) Cool the obtained precipitation precursor to room temperature, then wash it with deionized water to neutrality, dry it, and finally calcinate it at 500°C ...

Embodiment 2

[0029] (1) Get 10g of bismuth oxychloride pearlescent pigment with a particle size of 12 μm and 200ml of deionized water into a 1000ml four-necked round-bottomed flask, start stirring and heating to obtain pearlescent powder slurry, and adjust the pH with 2mol / L sodium hydroxide solution Adjust the value to 9-9.5, and finally control the reaction temperature to 70°C;

[0030] (2) Take 72.3ml of 50g / L sodium metavanadate solution, 78.7ml of 20g / L sodium metaaluminate solution, and 21.49ml of hydrochloric acid with a concentration of 2mol / L, and add them dropwise to the above pearl powder at a uniform speed while stirring In the slurry, the reaction temperature and pH should be kept constant during this process, and the stirring should be continued for 30 minutes after the dropwise addition to obtain the precipitated precursor;

[0031] (3) Cool the obtained precipitation precursor to room temperature, then wash it with deionized water to neutrality, dry it, and finally calcinat...

Embodiment 3

[0034] (1) Take 10g of bismuth oxychloride pearlescent pigment with a particle size of 12 μm and add 200ml of deionized water into a 1000ml four-neck round bottom flask, start stirring and heating to obtain pearlescent powder slurry, adjust the pH value with 2mol / L sodium hydroxide solution Adjust to 9-9.5, and finally control the reaction temperature to 80°C;

[0035] (2) Take 84.4ml of 50g / L sodium metavanadate solution and 81ml of 20g / L sodium metaaluminate solution, and then add 24.17ml of hydrochloric acid with a concentration of 2mol / L to the above pearl powder at a uniform speed while stirring In the slurry, the reaction temperature and pH should be kept constant during this process, and the stirring should be continued for 2 hours after the dropwise addition to obtain the precipitated precursor;

[0036] (3) Cool the obtained precipitation precursor to room temperature, then wash it with deionized water to neutrality, dry it, and finally calcinate it at 500°C for 2 hou...

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Abstract

The invention provides a conductive pearlescent pigment with a high refractive index and a preparation method thereof. In the preparation method, a bismuth oxychloride pearlescent pigment is used as abase material and is coated with 40-50wt% of a conductive coating which is a mixture of nano-Al2O3 and V2O5, and the prepared conductive pearlescent pigment is subjected to phase conversion in a butyl acetate-water system so that a refractive index is improved, wherein in the phase conversion, N-octyltriethoxysilane is used for modification so that the conductive pearlescent pigment with the highrefractive index is obtained. The conductive pearlescent pigment has good conductivity of 0.6-2 omega. cm and a refractive index of 2.23.

Description

technical field [0001] The invention belongs to the field of inorganic pearlescent pigments, in particular to a conductive pearlescent pigment with high refractive index and a preparation method thereof. Background technique [0002] Pearlescent pigment is a kind of effect pigment, and its pearlescent effect is formed due to its angle-dependent optical effect produced by alternating transparent layers with different refractive indices. [0003] In recent years, with the continuous expansion of the application field of pearlescent pigments and the wide application of electronic products, it is very important to prepare conductive pearlescent pigments with antistatic properties, conductive properties and color control. Traditional conductive pigments are metal powders such as gold, silver, copper, iron, or non-metallic powders such as graphite and carbon black are directly added to the paint, and the conductive powder is directly added to the paint. Not only the color is not e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/00C09C3/06C09C3/08
Inventor 李为民侯东霞姚超
Owner CHANGZHOU UNIV
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