Prussian blue pearlescent pigment and preparation method thereof

A technology of Prussian blue and effect pigments, applied in inorganic pigment processing, chemical instruments and methods, pharmaceutical formulations, etc., can solve problems such as coatings without disclosed pearlescent particles

Active Publication Date: 2012-05-09
FUJIAN KUNCAI MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The application does not disclose how the coating of pearlescent particles is formed

Method used

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

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preparation example Construction

[0009] The preparation method of Prussian blue series pearlescent pigment of the present invention comprises:

[0010] The transparent or translucent inorganic sheet-like material used as the substrate and water are mixed and stirred in a reactor at a solid-to-liquid ratio of 1:4-8, and the temperature is raised to 60-95°C, preferably 78-88°C, to obtain a suspension; A certain concentration of ferric chloride (FeCl 3 ), ferric nitrate (Fe(NO 3 ) 3 ) and iron sulfate (Fe 3 (SO 4 ) 2 ) in the iron salt solution from the top of the suspension in the reactor and above or below the liquid level, while adding a certain concentration of potassium ferrocyanide K 4 Fe(CN) 6 The solution is added from the bottom of the suspension (ie close to the bottom of the reactor), and at the same time a NaOH solution with a concentration of 1%-10% (mass percentage) is added to maintain the pH of the entire reaction system=3-5. After the reaction is completed by visual inspection, filter, wa...

Embodiment 1

[0033] In the reactor, 200 grams of natural mica-coated TiO with an average particle size of 20um 2 The interference blue pearlescent pigment (KC225) was used as a coating substrate, and 800 grams of water was added for stirring (-400rpm / min), and the temperature was raised to 85°C to obtain a suspension. 38% concentration (w / w) FeCl 3 The solution is added from above the suspension and below the liquid level at a speed of 7.5ml / min, and at the same time the concentration of 29% K 4 Fe(CN) 6 The solution was added from below the suspension (the bottom of the suspension, ie near the bottom of the reactor) at a rate of 0.5 ml / min, and the pH of the system was maintained at 3.3 with 10% NaOH solution, and the reaction was stirred while feeding. When the reaction was carried out to 120 minutes, the reaction was stopped (judged by measuring the color value with a color difference meter), and the above-mentioned system appeared dark blue. After the above system is filtered, washe...

Embodiment 2

[0035] Repeat embodiment 1, just be 30um natural mica coating Fe with 200 grams of mean particle size 2 o 3 The golden pearlescent pigment (KC300) is used as the coating substrate, and the reaction time is 80 minutes to obtain the green pearlescent effect pigment. The average thickness of the Prussian blue coating is 30 nm.

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Abstract

The invention relates to a novel pearlescent pigment having high color depth and brightness. The novel pearlescent pigment is made of substances which are prepared by coating transparent or translucent inorganic flaky materials (including natural mica, synthetic mica, glass sheet, silicon oxide, aluminum oxide, iron oxide and bismuth oxychloride crystals) with Prussian blue (Fe4[Fe(CN)6]3) and coating these flaky materials with metal or metal oxide, wherein the particle diameter of the inorganic flaky materials is 5-1000 micrometers, and the thickness is 0.1-5 micrometers; and the thickness of the coated Prussian blue film is 1-100 nanometers. The pearlescent pigment prepared from Prussian blue is widely used in the industries of paint, cosmetics, ink, plastics, leather and the like.

Description

technical field [0001] The present invention relates to a kind of Prussian blue series pearlescent effect pigment, specifically by Prussian blue (Fe 4 [Fe(CN) 6 ] 3 ) coated transparent or translucent inorganic sheet material. 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, yellow, red, purple, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/06C09C1/40C09D7/12C09D175/04C09D11/00C08K9/02A61K8/29A61K8/26
Inventor 袁占辉谢秉坤王莉玮
Owner FUJIAN KUNCAI MATERIAL TECH
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