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Magnetic Prussian blue pigment and preparation method thereof

A technology of Prussian blue and pearlescent pigments, applied in the direction of inorganic pigment treatment, chemical instruments and methods, fibrous fillers, etc., can solve problems such as unsuitable and restricted fields

Inactive Publication Date: 2013-02-13
FUJIAN KUNCAI MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So take Fe 3 o 4 Coated pearlescent pigments are not suitable for use at high temperatures, which limits their application fields

Method used

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  • Magnetic Prussian blue pigment and preparation method thereof
  • Magnetic Prussian blue pigment and preparation method thereof
  • Magnetic Prussian blue pigment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0093] Preparation Example 1-magnetic black pearlescent pigment coated with a cobalt ferrite layer on a mica substrate:

[0094] (1) In a 2L beaker, disperse 100g of natural mica (average particle size 20μm, average thickness 1.5μm) in 1000ml of deionized water to obtain a suspension (called suspension A-1), at a stirring speed of 400 rpm Heat to 78°C for 1 minute and adjust pH=3.0 with 1:1 HCl.

[0095] (2) With a drop rate of 1.1g / min, add 39wt% FeCl to the above suspension A-1 3 Solution 80ml and use 25% NaOH to keep the pH value of the solution constant at 3.0.

[0096] (3) Use 25wt% NaOH solution to adjust the pH of the above mixture to 9.0, and add 8wt% CoSO at a drop rate of 0.8ml / min 4 Solution 90ml, and use 25% NaOH to keep the pH value of the solution constant at 9.0.

[0097] (4) Suction filter the above mixture, wash with deionized water, dry at 120°C for 2 hours, and finally calcined at 800°C for 20 minutes to obtain a black pearlescent pigment (MP-1), and meas...

preparation Embodiment 2

[0102] (1) In a 2L beaker, disperse 100g of natural mica-coated TiO2 interference blue pearlescent pigment (KC225 blue pearlescent pigment) with an average particle size of 20um in 1000ml of deionized water, and heat it to 78C, adjust pH=3.0 with 1:1 HCl.

[0103] (2) With a drop rate of 1.1g / min, add 39% FeCl 3 Solution 60ml and use 25% NaOH to keep the pH value of the solution constant at 3.0.

[0104] (3) Use 25% NaOH solution to adjust the pH of the above mixture to 9.0, and add 70ml of 8% CoSO4 solution at a drop rate of 0.8ml / min, and use 25% NaOH to keep the pH value of the solution constant.

[0105] (4) The above mixture was washed with deionized water, dried at 120°C for 2 hours, and finally calcined at 800°C for 20 minutes to obtain a black pearlescent pigment (MP-2). The thickness of the ferrite layer was measured to be 25nm.

[0106] The saturation specific magnetization (Ms) was detected with a Sigmameter specific saturation magnetization tester, and the satura...

preparation Embodiment 3

[0108] Repeat Example 1 of Chinese Patent Publication CN101460574A (Application No. 200780020908.7) to finally obtain a black pearlescent pigment (MP-3), and measure the thickness of the ferrite layer to be 50 nm.

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Abstract

The invention provides a magnetic Prussian blue pigment. The novel magnetic Prussian blue pigment with high chrominance and luminance is prepared by coating a ferrite layer on one or more of native mica, synthetic mica, glass sheets, silica sheets, aluminum oxide sheets, ferric oxide sheets, boron nitride sheets, bismuth oxychloride sheets and metal or metal-oxide-coated product of the sheet materials, and coating Prussian blue (Fe4[Fe (CN)6]3) on the substrate coated with the ferrite layer. The pigment is widely used in paint, cosmetics, printing ink, plastic, leather and other industries.

Description

technical field [0001] The present invention relates to a kind of magnetic Prussian blue series pearlescent effect pigment, relate to further coating Prussian blue (Fe 4 [Fe(CN) 6 ] 3 ) formed magnetic Prussian blue pearlescent effect pigments. Background technique [0002] In the 18th century, a German named Diesbach made the yellow crystal potassium ferrocyanide K 4 Fe(CN) 6 Adding ferric chloride to the solution produced a very bright blue precipitate, and was the first to invent Prussian blue. Since then Prussian blue has been widely used as a pigment. [0003] Since DuPont invented pearlescent pigments in the 1960s, pearlescent pigments have been widely used in coatings, cosmetics, plastics, leather and inks. All these prepared pearlescent pigments are coated with titanium, iron, Metal oxides such as tin, the light passes through the surface of these films to form a combination of refraction and reflection, and finally due to the difference in film thickness, yel...

Claims

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Application Information

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IPC IPC(8): C09C1/26C09C1/40C09C3/06
Inventor 袁占辉谢秉坤林邦浩王莉玮
Owner FUJIAN KUNCAI MATERIAL TECH
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