Preparation method of medium-temperature-resistant magnetic pearlescent pigments

A pearlescent pigment and medium temperature resistant technology, applied in the field of pigments, can solve the problems of easy oxidation color purity and magnetic properties, reduced color purity of pearlescent substrates, and high equipment and operation requirements, so as to reduce self-agglomeration, facilitate the realization of industrialized production, and have low cost. Effect

Inactive Publication Date: 2018-12-21
ZHEJIANG COLORAY TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN104893366B proposes to deposit iron cobaltate, aluminum oxide, and silicon oxide on the surface of the pearlescent pigment substrate in sequence, and then undergo suction filtration, washing, drying and high-temperature calcination to prepare a magnetic pearlescent pigment with 3D effect; this preparation process High-temperature calcination is required to form magnetic cobalt ferrite, but the high-temperature calcination step will easily reduce the color purity of the pearlescent substrate and increase energy consumption. At the same time, the product contains heavy metal cobalt, which limits its application in the field of cosmetics.
This preparation process needs to be carried out under anaerobic conditions, which has high requirements on equipment and operation, and high production costs, which affect its large-scale production; the prepared black glossy magnetic pearl is not resistant to medium temperature and is easy to oxidize, resulting in a decrease in color purity and magnetic properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides a kind of preparation method of medium temperature resistant magnetic pearlescent pigment, specifically, comprises the following steps:

[0029] Step 1: Add 20g of the finished pearlescent pigment into 200g of deionized water under stirring conditions, raise the temperature to 60°C, and stir for 15min to obtain the pearlescent pigment suspension;

[0030] Step 2: Prepare 12 g of ferric chloride as a 1mol / L ferric chloride solution, then add 10 g of ferrous chloride tetrahydrate, stir to dissolve completely, add 1.5 g of citric acid, and stir to dissolve to obtain a mixed solution of iron ;

[0031] Step 3: Mix the pearlescent pigment suspension prepared in step 1 with the mixed solution of iron prepared in step 2, stir at 60°C for 10 minutes, add dropwise 0.5mol / L urea solution until the pH value is 8.0, and maintain the The pH value was stirred at constant temperature for 15 minutes to obtain a slurry;

[0032] Step 4: Warm up the slurry prep...

Embodiment 2

[0035] This embodiment provides a kind of preparation method of medium temperature resistant magnetic pearlescent pigment, specifically, comprises the following steps:

[0036] Step 1: under stirring conditions, add 50g of finished pearlescent pigment into 1000g of deionized water, raise the temperature to 85°C, and stir for 45min to obtain pearlescent pigment suspension;

[0037] Step 2: Prepare 20g of ferric chloride as a 1mol / L ferric chloride solution, then add 10g of ferrous chloride tetrahydrate, stir to dissolve completely, add 3.0g of citric acid, stir and dissolve to obtain a mixed solution of iron ;

[0038] Step 3: Mix the pearlescent pigment suspension prepared in step 1 with the mixed solution of iron prepared in step 2, stir for 30 minutes at 80°C, add dropwise 1.5mol / L urea solution to a pH value of 9.0, and maintain the The pH value was stirred at constant temperature for 45 minutes to obtain a slurry;

[0039] Step 4: Warm up the slurry prepared in step 3 to...

Embodiment 3

[0042] This embodiment provides a kind of preparation method of medium temperature resistant magnetic pearlescent pigment, specifically, comprises the following steps:

[0043] Step 1: under stirring conditions, add 35g of finished pearlescent pigment into 525g of deionized water, raise the temperature to 75°C, and stir for 30min to obtain pearlescent pigment suspension;

[0044] Step 2: Prepare 16g of ferric chloride as a 1mol / L ferric chloride solution, then add 10g of ferrous chloride tetrahydrate, stir to dissolve completely, add 2.2g of citric acid, stir and dissolve to obtain a mixed solution of iron ;

[0045] Step 3: Mix the pearlescent pigment suspension prepared in step 1 with the mixed solution of iron prepared in step 2, stir at 75°C for 20 minutes, add 1.0mol / L urea solution dropwise to pH 8.5, and maintain the The pH value was stirred at constant temperature for 30 minutes to obtain a slurry;

[0046] Step 4: Heat the slurry prepared in step 3 to 90°C, dilute 0...

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Abstract

The invention belongs to the technical field of pigments, and relates to a preparation method of medium-temperature-resistant magnetic pearlescent pigments. The preparation method comprises the following steps: step I, adding a finished product pearlescent pigments into deionized water under a stirring condition, heating, stirring, and obtaining pearlescent pigment suspension; step II: adding ferrite into an iron salt solution, stirring, completely stirring, adding a complexing agent, stirring, dissolving, and obtaining an iron mixed solution; step III: mixing the pearlescent pigment suspension obtained in step I and the iron mixed solution obtained in step II, dropwise adding urea, and obtaining slurry; and step IV: heating the slurry obtained in step III to 85 to 95 DEG C, dropwise adding a tetraethoxysilane solution diluted by a diluting agent under a constant-temperature stirring condition, then continuously stirring for 2 to 4 hours, performing the suction filtration, cleaning, drying, and obtaining the medium-temperature-resistant magnetic pearlescent pigments. By introducing the complexing agent, the problem of the weakening of pigment magnetism caused by the oxidation of ferrite ions by the air in the reaction process can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of pigments, and relates to a preparation method of a medium-temperature-resistant magnetic pearlescent pigment. Background technique [0002] In recent years, with the continuous deepening of my country's economic reform, people's living standards have been significantly improved, and they have a deeper understanding and higher requirements for the quality of life. With the innovation of decoration, 3D three-dimensional magic pearlescent as a high-end pearlescent pigment It has become the new favorite of fashion decoration. Its unique 3D stereoscopic effect, dreamy and vivid colors, unique metal texture, natural and smooth lines, and changeable visual effects are very popular among designers and popular choices for decoration. It endows natural and beautiful three-dimensional lines and patterns, and deep visual effects to make the product feel alive. Widely used in 3D three-dimensional phantom glass product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/06
CPCC09C1/00C09C3/063
Inventor 卓仲标唐骏林存贯孟祥远胡荣柳黄加省
Owner ZHEJIANG COLORAY TECH DEV
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