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Preparation method of bismuth oxychloride pearlescent pigment

A technology of bismuth oxychloride and pearlescent pigments, applied in chemical instruments and methods, inorganic pigment processing, inorganic chemistry and other directions, can solve problems such as poor purity of bismuth oxychloride, and achieve good pearlescent effect and good protective effect.

Active Publication Date: 2021-07-27
JILIN TEACHERS INST OF ENG & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems in the prior art, the present invention provides a preparation method of bismuth oxychloride pearlescent pigment, which solves the problem of poor purity of existing bismuth oxychloride, performs hydrolysis reaction in a non-aqueous solution, and cooperates with the difference in solubility to achieve low particle size. Preparation of bismuth oxychloride without the use of surfactants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of bismuth oxychloride pearlescent pigment, comprising the steps of:

[0026] Step 1, using bismuth chloride as a raw material and acetone as a solvent to form a dissolving solution;

[0027] The preparation steps of the solution include: a1, adding bismuth chloride to acetone and continuously stirring at low temperature for 10 minutes to obtain a prefabricated solution; the concentration of bismuth chloride in the prefabricated solution is 10g / L, and the low temperature stirring speed is 500r / min , the temperature is 5°C; a2, the prefabricated solution is subjected to reflux reaction, and then cooled and filtered to obtain the solution, the temperature of the reflux reaction is 60°C, the reflux rate is 2mL / min, and the temperature of the cooled filter is 2°C; Use soluble organic liquid to dissolve bismuth chloride, and use the method of reflux to form a sufficient circulation dissolution effect, while improving the dissolution effect, remove impuri...

Embodiment 2

[0035] A preparation method of bismuth oxychloride pearlescent pigment, comprising the steps of:

[0036] Step 1, using bismuth chloride as a raw material and ethyl acetate as a solvent to form a dissolving solution;

[0037] Wherein, the soluble organic solvent adopts ethyl acetate;

[0038] The preparation steps of the solution include: a1, adding bismuth chloride to ethyl acetate and continuously stirring at low temperature for 20 minutes to obtain a prefabricated solution; the concentration of bismuth chloride in the prefabricated solution is 50g / L, and the stirring speed at low temperature is 1000r / min, the temperature is 10°C; a2, the prefabricated solution is subjected to reflux reaction, and then cooled and filtered to obtain the dissolved solution, the temperature of the reflux reaction is 70°C, the reflux speed is 5mL / min, and the temperature of the cooled filter is 10 ℃; use ethyl acetate to dissolve bismuth chloride, and use the method of reflux to form a suffici...

Embodiment 3

[0046] A preparation method of bismuth oxychloride pearlescent pigment, comprising the steps of:

[0047] Step 1, using bismuth chloride as a raw material and ethyl acetate as a solvent to form a dissolving solution;

[0048] Wherein, the soluble organic solvent adopts ethyl acetate;

[0049] The preparation steps of the solution include: a1, adding bismuth chloride to ethyl acetate and continuously stirring at low temperature for 15 minutes to obtain a prefabricated solution; the concentration of bismuth chloride in the prefabricated solution is 30g / L, and the low temperature stirring speed is 800r / min, the temperature is 8°C; a2, the prefabricated solution is subjected to reflux reaction, and then cooled and filtered to obtain the dissolved solution, the temperature of the reflux reaction is 65°C, the reflux speed is 4mL / min, and the temperature of the cooled filter is 8 ℃; use ethyl acetate to dissolve bismuth chloride, and use the method of reflux to form a sufficient ci...

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Abstract

The invention belongs to the field of pearlescent pigments, and particularly relates to a preparation method of a bismuth oxychloride pearlescent pigment. The method comprises the following steps in a non-aqueous reaction system: step 1, forming a dissolving solution by taking bismuth chloride as a raw material and a soluble organic solution as a solvent; step 2, taking the dissolving solution as a reaction solution, slowly hydrolyzing to form a turbid liquid, and treating to obtain a fine powder precipitate; and step 3, washing the fine powder precipitate to obtain the bismuth oxychloride pearlescent pigment. Furthermore, the technical scheme also provides a pearlescent pigment of a silica coating system, which takes the material as a core. The problem that existing bismuth oxychloride is poor in purity is solved, hydrolysis reaction is carried out in a non-aqueous solution, the solubility difference is matched, preparation of low-particle-size bismuth oxychloride is achieved, and meanwhile a surfactant does not need to be adopted.

Description

technical field [0001] The invention belongs to the field of pearlescent pigments, in particular to a preparation method of bismuth oxychloride pearlescent pigments. Background technique [0002] Because the bismuth oxychloride wafer has strong adhesion to the skin, and has pearlescent effect and smoothing effect, at the same time, compared with other heavy metal elements, bismuth element has the characteristics of low toxicity, and bismuth is not easily absorbed by the body, does not cause cancer, and does not damage the skin. The DNA structure can be taken out of the body through urination, making it an important raw material in the synthesis of cosmetics, used to prepare high-end cosmetics, such as face powder, nail polish, eye shadow, etc. The UV-Vis absorption spectrum of smaller-sized bismuth oxychloride particles has strong absorption in the ultraviolet band, and the cosmetics made of bismuth oxychloride wafers have skin care effects such as UV protection. However, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/06C01G29/00
CPCC09C1/0021C09C3/063C01G29/00C09C2200/1087C09C2200/401C01P2004/62C01P2004/86
Inventor 刘刚赵立平王亚孙宇航何佳星刘少华和淼
Owner JILIN TEACHERS INST OF ENG & TECH
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