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High chroma and high brightness pearlescent pigment and preparation method thereof

A pearlescent pigment and flaky technology, which is applied in the direction of inorganic pigment treatment, chemical instruments and methods, fibrous fillers, etc., can solve the problems of technical difficulty and limited raw materials, and achieve simple process, dense coating, excellent chroma and The effect of brightness

Inactive Publication Date: 2018-08-07
FUJIAN KUNCAI MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to factors such as technical difficulty and limited raw materials, it has not been widely used.

Method used

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  • High chroma and high brightness pearlescent pigment and preparation method thereof
  • High chroma and high brightness pearlescent pigment and preparation method thereof
  • High chroma and high brightness pearlescent pigment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 100g of mica with a particle size of 10-60μm and a diameter-to-thickness ratio of ≥60, put it in a 5L beaker, add 2000mL of deionized water, add 0.5% of crystal guiding agent polyvinylpyrrolidone, put it in a water bath, and Stir at a rate of 200-300rps, heat up to 60-70°C, adjust the pH value of the solution between 1.2-1.8, add 100mL of 2.5% tin tetrachloride aqueous solution, and maintain the pH value of the solution with 30% NaOH solution. Add half an hour, then raise the temperature to 75-85°C, adjust the pH value of the solution between 1.5-2.5, add 2mol / L titanium tetrachloride solution dropwise at a rate of 1mL / min, and maintain the solution with NaOH solution The pH value remains unchanged. After reacting for 3 to 4 hours, filter, dry the filter cake, put it into a muffle furnace, 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. The silver muscovite titanium pearlescent pi...

Embodiment 2

[0028] Weigh 100g of mica with a particle size of 10-60μm and a diameter-to-thickness ratio>50, put it in a 2L beaker, add 1500mL of deionized water, add 1% of the crystal guiding agent octadecylammonium bromide, and put it in a water bath , and stirred at a rate of 200-300rps, heated to 75-85°C, adjusted the pH value of the solution between 3-4, added dropwise 10% ferric chloride solution at a rate of 2mL / min, and added 30% Keep the pH value of the solution constant with NaOH solution, react for 5-6 hours, filter, dry the filter cake and put it in a muffle furnace, raise the temperature to 900°C at a heating rate of 10°C / min, keep it warm for 1 hour, take it out, After cooling to room temperature, a red mica iron pearlescent pigment is obtained, wherein the thickness of the flake iron oxide coated on the surface is 50nm, and the length is 120nm.

Embodiment 3

[0030] Weigh 100g of mica with a particle size of 10-60μm and a diameter-to-thickness ratio ≥ 60, put it in a 5L beaker, add 2000mL of deionized water, add 1% of the crystal guiding agent octadecyldiethanolamine, and put it in a water bath , and stir at a rate of 200-300rps, heat up to 60-70°C, adjust the pH value of the solution between 1.2-1.8, add 100mL of 2.5% tin tetrachloride aqueous solution, and maintain the pH value of the solution with 30% NaOH solution No change, the addition is completed in half an hour, then the temperature is raised to 75-85°C, the pH value of the solution is adjusted between 1.5-2.5, and 2mol / L titanium tetrachloride solution is added dropwise at a rate of 1mL / min, and NaOH The solution maintains the pH value of the solution. After reacting for 6-7 hours, adjust the pH value of the solution between 3-4, add 10% ferric chloride solution dropwise at a rate of 2mL / min, and maintain it with 30% NaOH solution. The pH value of the solution remains unc...

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Abstract

The invention relates to a high chroma and high brightness pearlescent pigment and a preparation method thereof and particularly relates to a pearlescent pigment formed from a sheet substrate-coated shape-controllable metal oxide and a preparation method thereof. In a hydrolysis coating process of a metal salt, a certain amount of a crystal conducting agent is used in advance to adjust the shape of the metal oxide produced by the hydrolysis so that a pearlescent pigment having a controlled shape and obtained by coating a sheet substrate with a metal oxide is obtained. The preparation method has simple processes, is easy to operate and greatly improves the quality of the product.

Description

technical field [0001] The invention relates to a pearlescent pigment, in particular to a pearlescent pigment with high chroma and high brightness formed by coating a metal oxide with a controllable shape on a flake substrate and a preparation method thereof. Background technique [0002] Effect pigments generally refer to a composite material formed by coating one or more metal oxides on a sheet-shaped substrate. Based on the structural characteristics of effect pigments, it not only has the color of traditional inorganic organic pigments, but also has a certain gloss effect of metallic pigments. With the development of society and the improvement of people's aesthetic concept, the requirements for the color and luster of pigments are getting higher and higher. At present, the synthesis method of pearlescent pigments basically adopts the method of liquid phase deposition, through the salt corresponding to the metal oxide, under certain pH value and temperature conditions, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/40C09C1/28C09C3/08C09C3/06C09C3/10C09D7/40C08K9/10C08K7/00C08K3/22C08K3/34
CPCC08K3/22C08K3/34C08K7/00C08K9/10C08K2003/2241C08K2201/003C09C1/28C09C1/405C09C1/407C09C3/006C09C3/063C09C3/08C09C3/10C09C2200/102C09C2200/401
Inventor 谢秉昆费明曹志成
Owner FUJIAN KUNCAI MATERIAL TECH
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