Black pearlescent pigment and preparation method and application thereof

A pearlescent pigment, black technology, applied in the direction of pigment preparation, inorganic pigment processing, chemical instruments and methods, etc., can solve the problems of limited application range of black pearlescent pigments, insufficient blackness and brightness, poor temperature resistance, etc., to increase reflection and Refraction, high blackness and brightness, easy to process effects

Active Publication Date: 2018-12-21
FUJIAN KUNCAI MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this kind of pearlescent pigment can withstand high temperature, its blackness and brightness are not enough
Third, a layer of ferric oxide is coated on the surface of the pearlescent base material to form a black pearlescent pigment, which has a certain brightness and blackness, but has poor temperature resistance. Ferric oxide is easily transformed into iron oxide red under high temperature conditions.
Therefore, the existing above three types of products can only be limited to use in certain fields, which seriously limits the application range of black pearlescent pigments

Method used

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  • Black pearlescent pigment and preparation method and application thereof

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preparation example Construction

[0057] According to one aspect of the present invention, a kind of preparation method of black pearlescent pigment, described method comprises the following steps:

[0058] First, add water to the pigment base material to make a slurry, and then use the method of hydrolytic coating in sequence according to the layered sequence of the black pearlescent pigment from the inside to the outside. 1, a silicon-doped cobalt oxide layer, a second ferric oxide layer and a second cobalt oxide layer are coated on the pigment substrate, and then an outer protective layer is optionally coated to obtain a black pearlescent pigment.

[0059] The preparation method of the black pearlescent pigment provided by the present invention, the preparation method uses the method of hydrolytic coating in sequence according to the layered sequence of the black pearlescent pigment from the inside to the outside, the indium oxide layer, the first ferric oxide layer, the first oxide The cobalt layer, the si...

Embodiment 1

[0078] Under stirring conditions, add 100 g of fluorphlogopite mica with a particle size range of 5-45 μm (average particle size is 27 μm) into 2 L of soft water, and heat to 80 ° C, and adjust the pH value to 3.0 with 1:1 hydrochloric acid, Then slowly meter in 200ml 5% indium trichloride solution, adopt 30% sodium hydroxide solution to carry out constant pH value constant,

[0079] After the addition, continue to slowly meter in 900ml of 10% ferric chloride solution. During this period, use 30% sodium hydroxide solution to keep the pH constant, and then increase the pH to 8.0, then slowly meter in 200ml of 5% Cobalt chloride solution, simultaneously with 30% sodium hydroxide control and keep PH=8.0 constant;

[0080] Continue to stir for half an hour after the addition, use 1:1 hydrochloric acid to reduce the pH value to 3.0, continue to slowly add 900ml of 10% ferric chloride solution, and use 30% sodium hydroxide solution to keep the pH value unchanged.

[0081] Continue ...

Embodiment 2

[0085] Under stirring conditions, add 100 g of fluorphlogopite mica with a particle size range of 5-45 μm (average particle size is 27 μm) into 2 L of soft water, and heat to 80 ° C, and adjust the pH value to 3.0 with 1:1 hydrochloric acid, Then slowly meter in 200ml 5% indium trichloride solution, adopt 30% sodium hydroxide solution to carry out constant pH value constant,

[0086] After the addition, continue to slowly meter in 900ml of 10% ferric chloride solution. During this period, use 30% sodium hydroxide solution to keep the pH constant, and then increase the pH to 8.0, then slowly meter in 200ml of 5% Cobalt chloride solution, while using 30% sodium hydroxide to control and keep pH=8.0 constant.

[0087] Continue stirring for half an hour after the addition, at this pH value, slowly meter in 500 ml of 20% sodium silicate solution while controlling and keeping the pH at 8.0 with 5% cobalt chloride solution.

[0088] Continue to stir for half an hour after the additio...

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Abstract

The invention provides a black pearlescent pigment and a preparation method and application thereof, which relate to the technical field of pearlescent pigments. The black pearlescent pigment is prepared from a pigment base material, an indium oxide layer, a first ferric oxide layer, a first cobalt oxide layer, a second ferric oxide layer and a second cobalt oxide layer sequentially from inside tooutside. In the black pearlescent pigment, first indium oxide is used for wrapping as crystal guide agent, and the substrate is then alternately wrapped by the high-refraction ferric oxide layers andthe low-refraction cobalt oxide layers. Since the wrapping layer of the pearlescent pigment is designed as a multi-layered interface structure, the reflection and refraction of light can be effectively increased, consequently, brightness and chromaticity are enhanced, and the black pearlescent pigment has a high twinkling effect; moreover, indium oxide added as crystal guide agent can enable thepigment to form crystals with a regular and uniform structure, and thereby the black pearlescent pigment has the effect of resisting high temperature. Therefore, compared with conventional black pearlescent pigments, the black pearlescent pigment disclosed by the invention has high blackness and brightness, and also has the advantages of high temperature resistance and high twinkling.

Description

technical field [0001] The invention relates to the technical field of pearlescent pigments, in particular to a black pearlescent pigment and its preparation method and application. Background technique [0002] As a new type of pigment, pearlescent pigment is gradually widely used in the application fields of traditional organic, inorganic and metallic pigments. Based on the structural characteristics of pearlescent pigments, pearlescent pigments not only have the color of traditional inorganic and organic pigments, but also have a certain gloss effect of metallic pigments. With the market demand, customers are more and more inclined to pearlescent pigments with high chroma. Among the pigments of many colors, black is in great demand. [0003] The black pearlescent pigments currently on the market mainly include the following types of products: First, organic pigments (such as carbon black, etc.) and pearlescent pigments are chemically combined or physically adsorbed to fo...

Claims

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Application Information

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IPC IPC(8): C09C1/42C09C3/06C09D167/00C09D7/61C08K3/013
CPCC08K3/013C09C1/0015C09C2200/1033C09C2200/205C09C2200/408C09C2220/106C09D7/61C09D167/00C08L23/12
Inventor 费明邱玉琴丁家国谢秉昆
Owner FUJIAN KUNCAI MATERIAL TECH
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