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A kind of preparation method of pearlescent pigment

A pearlescent pigment and solution technology, applied in inorganic pigment treatment, chemical instruments and methods, fibrous fillers, etc., can solve the problems of poor film stability and difficulty in obtaining uniform color, and achieve the effect of film stability and uniform hue.

Active Publication Date: 2019-02-01
湖州优彩新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a preparation method of pearlescent pigments in view of the poor stability of the film layer formed by the current pearlescent pigments and the difficulty in obtaining a uniform hue

Method used

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  • A kind of preparation method of pearlescent pigment

Examples

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preparation example Construction

[0022] The preparation method of sulfuric acid titanyl acid solution: put titanyl sulfate, 1.3mol / L sulfuric acid solution and water into the container according to the mass ratio of 4~6:3~5:15~20, stir at 400r / min for 20~25min, That's it.

[0023] The preparation method of pearlescent pigment of the present invention, comprises the steps:

[0024] (1) According to the mass ratio of 1:3, take mica powder and 1.8mol / L hydrochloric acid in a container and mix evenly, keep warm at 70-80°C for 1-2 hours, filter while it is hot, and collect the filter residue, according to the mass ratio of 1:2 ~4, mix the filter residue with 1.2mol / L hydrogen peroxide evenly, heat at 85~90℃ for 55~65min, cool to room temperature, filter, collect the filtrate, wash the filtrate with water until there is no chloride ion in the filtrate, wash the The final filtrate is dried at 100°C for 4 to 5 hours, and the dried matter is collected;

[0025] (2) According to the mass ratio of 4~6:1:0.4~0.8:2~4, p...

example 1

[0030] Mica powder (manufacturer: Guangdong Yufeng Powder Material Co., Ltd.; bulk density: 2.6 g / cm 3 ; Whiteness: 96; Fineness: the average particle size is 10.5±0.5μm).

[0031] Choice of surfactant: triethanolamine oleate.

[0032] The preparation method of sulfuric acid titanyl acid solution: put titanyl sulfate, 1.3mol / L sulfuric acid solution and water into a container at a mass ratio of 4:3:15, and stir at 400r / min for 25min.

[0033] The preparation method of pearlescent pigment of the present invention, comprises the steps:

[0034] (1) According to the mass ratio of 1:3, take mica powder and 1.8mol / L hydrochloric acid in a container and mix evenly, keep warm at 80°C for 2 hours, filter while it is hot, collect the filter residue, and mix the filter residue with Mix 1.2mol / L hydrogen peroxide evenly, heat at 90°C for 65 minutes, cool to room temperature, filter, collect the filtrate, wash the filtrate with water until there is no chloride ion in the filtrate, and ...

example 2

[0040] Mica powder (manufacturer: Guangdong Yufeng Powder Material Co., Ltd.; bulk density: 2.6 g / cm 3 ; Whiteness: 96; Fineness: the average particle size is 10.5±0.5μm).

[0041] Choice of surfactant: fatty amine polyoxyethylene ether.

[0042] The preparation method of sulfuric acid titanyl acid solution: put titanyl sulfate, 1.3mol / L sulfuric acid solution and water into a container at a mass ratio of 4:3:15, and stir at 400r / min for 25min.

[0043] The preparation method of pearlescent pigment of the present invention, comprises the steps:

[0044] (1) According to the mass ratio of 1:3, take mica powder and 1.8mol / L hydrochloric acid in a container and mix evenly, keep warm at 70°C for 1 hour, filter while it is hot, and collect the filter residue, according to the mass ratio of 1:2, mix the filter residue with Mix 1.2mol / L hydrogen peroxide evenly, heat at 85°C for 55 minutes, cool to room temperature, filter, collect the filtrate, wash the filtrate with water until ...

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Abstract

The invention relates to a method for preparing pearlescent pigments, belonging to the technical field of inorganic non-metallic materials. In the present invention, mica powder and hydrochloric acid are mixed, heated and filtered, the filter residue is mixed with hydrogen peroxide and heated, filtered, and the filtrate is collected, washed and dried, mixed with vinyltriethoxysilane, etc. , ball mill, polyvinyl alcohol, etc., after a mixed reaction, centrifuge and separate, collect the lower precipitate, mix the lower precipitate with water, and use hydrochloric acid to adjust the pH, and at the same time add sulfuric acid titanic acid solution and sodium hydroxide solution dropwise, and filter after standing , the filter cake was calcined, crushed, sieved and mixed with water evenly, and the pH was adjusted with hydrochloric acid, and at the same time, sulfuric acid titanic acid solution and sodium hydroxide solution were added dropwise, left to stand and filtered, the filter cake A was collected, and the filter cake A Washing, calcining, crushing can be. The pearlescent pigment prepared by the invention has good properties of acid and alkali resistance, solvent resistance and the like, and the formed film layer has good stability, high whiteness value and uniform hue.

Description

technical field [0001] The invention relates to a method for preparing pearlescent pigments, belonging to the technical field of inorganic non-metallic materials. Background technique [0002] Pearlescent pigments are pigments that give pearly luster to products. It is a transparent or translucent flake as the core, and uses a special chemical process to coat one or more layers of titanium dioxide and other metal oxides on its surface. When When the light hits the interface of the pearlescent pigment, reflected light and refracted light will be produced, part of the light is transmitted and then reflected, and they interfere with each other to produce a three-dimensional pearlescent color. At present, most of the base materials are mica flakes, which are covered with a high-refraction titanium dioxide coating. When white light shines on this type of pigment, it is partially reflected by the titanium dioxide layer, and the rest of the light passes through (refracts) the titan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/40C09C3/04C09C3/06C09C3/08C09C3/10C09C3/12
CPCC09C1/0015C09C3/006C09C3/041C09C3/043C09C3/06C09C3/063C09C3/08C09C3/10C09C3/12C09C2200/102C09C2200/401
Inventor 钟雄薛焱璟王磊
Owner 湖州优彩新材料股份有限公司
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