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A kind of pearlescent pigment directly used for electrostatic powder spraying and preparation method thereof

A technology of pearlescent pigments and electrostatic powders, applied in powder coatings, inorganic pigment treatment, chemical instruments and methods, etc., can solve the problems of use and poor brightness, and achieve the effects of simplifying the process, reducing costs, and reducing binding steps

Active Publication Date: 2019-10-15
FUJIAN KUNCAI MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These patents are all for the purpose of obtaining conductive mica. The obtained pearlescent pigments are all light-colored and have a conductivity below 100KΩ·cm, but the brightness is extremely poor, and they can only be used as conductive fillers, not pearlescent pigments with decorative effects. paint to use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 200g of mica titanium pearlescent pigment KC103 (purchased from Fujian Kuncai Material Technology Co., Ltd.) with a particle size of 10-60 μm, place it in a 2L beaker, add 1600mL of deionized water, put it in a water bath, and wash it with 200 Stir at -300rps speed, heat up to 70-80°C, adjust the pH value of the suspension to 7.5-8.5, add 200ml 5% (weight) water glass solution within 1 hour, and maintain the pH stability with 5% hydrochloric acid, continue after adding Stir for half an hour, adjust the pH value of the solution between 1.5-2.0 with 1:1 hydrochloric acid, configure 20g of tin tetrachloride pentahydrate and 2.5g of antimony pentachloride in 40ml of concentrated hydrochloric acid, and dilute to 400ml with deionized water. The configured mixed solution of tin antimony chloride is added dropwise into the beaker at a rate of 2 mL / min, and the pH value of the solution is kept constant with 30% NaOH solution. After reacting for 3 or 4 hours, the suspension ...

Embodiment 2

[0035] Weigh 500g of synthetic mica titanium pearlescent pigment KC8725 (purchased from Fujian Kuncai Material Technology Co., Ltd.) with a particle size of 40-160 μm, place it in a 5L beaker, add 4000mL of deionized water, put it in a water bath, and use 200 Stir at -300rps, heat up to 70-80°C, adjust the pH of the solution between 3.0-4.2, weigh 2.32g of tin tetrachloride hydrate and 17.5g of indium trichloride, add 20ml of concentrated hydrochloric acid, and use deionized Dilute it with water to 500ml, drop it into the beaker at a rate of 1.6mL / min, and keep the pH value of the solution constant with NaOH solution. Raise the temperature to 800°C at a heating rate of 10°C / min, keep it warm for 1 hour, take it out, and cool it to room temperature to obtain a blue iridescent synthetic mica titanium pearlescent pigment coated with ITO.

Embodiment 3

[0037] Weigh 200g of mica iron pearlescent pigment KC500MK (purchased from Fujian Kuncai Material Technology Co., Ltd.) with a particle size of 10-60 μm, place it in a 2L beaker, add 1600mL of deionized water, put it in a water bath, and use 200 Stir at -300rps, heat up to 70-80°C, adjust the pH value of the solution between 6.5-7.5, weigh 13.28g of zinc chloride and 0.5g of hexahydrate and aluminum chloride, add 10ml of concentrated hydrochloric acid, and use deionized Dilute it with water to 500ml, drop it into the beaker at a rate of 1.5mL / min, and keep the pH value of the solution constant with NaOH solution. After reacting for 5 or 6 hours, filter, and put the filter cake into a muffle furnace after drying. Raise the temperature to 700°C at a heating rate of 10°C / min, keep it warm for 1 hour, take it out, and cool it to room temperature to obtain a bronze mica iron pearlescent pigment coated with AZO.

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Abstract

The invention provides a pearlescent pigment capable of being directly used for electrostatic powder spraying and a preparation method of the pearlescent pigment. The pearlescent pigment disclosed by the invention comprises pearlescent pigment serving as a substrate prepared from flake base materials such as natural flake mica, flake synthetic mica, flaky alumina, flaky silicon oxide, sheet glass flakes and the like, and a doped semiconductor oxide layer coated on the surface off the pearlescent pigment substrate, wherein the doped semiconductor oxide layer is composed of at least one oxide serving as a principle component selected from tin, zinc and indium and at least one doped oxide selected from oxides of antimony, aluminum and tin. The metal serving as the principle component and the doped metal cannot be simultaneously the tin. Therefore, the matching problem of electrical conductivity of resins in a powder coating is ensured, the brightness and color of powder spraying are ensured, the pearlescent pigment binding step in the powder coating is reduced, the utilization rate of the pearlescent pigment is improved, and the process is simplified.

Description

technical field [0001] The invention relates to a pearlescent pigment directly used for powder spraying and a preparation method thereof, in particular, to coating a layer of conductive nanostructure doped semiconductor oxide on the surface of the pearlescent pigment, such as aluminum-doped zinc oxide, antimony-doped oxide Tin and tin-doped indium oxide, etc. Background technique [0002] Powder coating is a new type of solvent-free, 100% solid powder coating. This type of finished coating is a new type of solvent-free product that does not contain toxicity, solvents, and volatile toxic substances, so it has no pollution, no fire, and no "three wastes" emissions. Requirements of environmental protection law; high utilization rate of raw materials, oversprayed powder can be recycled, and the highest utilization rate can even reach more than 99%; after pre-treatment of the coated object, one-time construction, without primer, can get sufficient thickness Coating film, easy t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/03C09D7/62C09C1/40C09C1/28C09C3/06
Inventor 谢秉昆曹志成陈继威
Owner FUJIAN KUNCAI MATERIAL TECH CO LTD
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