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Pearlescent pigments, methods for producing same, and use of such pearlescent pigments

A technology of pearlescent pigment and structure, which is applied in the direction of pigment preparation, inorganic pigment treatment, chemical instruments and methods, etc., which can solve the problems of high cost and achieve the effects of low manufacturing cost, high hiding power and excellent chroma

Active Publication Date: 2018-01-09
SCHLENK METALLIC PIGMENTS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another disadvantage of known pearlescent pigments is the high costs associated with the production process

Method used

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  • Pearlescent pigments, methods for producing same, and use of such pearlescent pigments
  • Pearlescent pigments, methods for producing same, and use of such pearlescent pigments
  • Pearlescent pigments, methods for producing same, and use of such pearlescent pigments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] Example 1 -with SiO 2 (50nm) and iron oxide coated (110nm) aluminum flakes

[0101] First, using tetraethyl orthosilicate (TEOS), 60 g of SiO 2 Coated on a 10g Al flake (thickness (t 50 ) between 10 nm and 20 nm, d50 = 15 μm). In a round bottom flask with reflux condenser and stirrer, these Al flakes were mixed with 500 ml of deionized water and heated to 75 °C with stirring. The pH was adjusted to 3.2 by adding 10% NaOH solution. The reaction mixture was mixed with 700 g of 40% FeCl 3 The solution was mixed and the pH was kept essentially constant at 3.2 by simultaneous addition of 10% NaOH solution. Add FeCl 3 After the solution was complete, the mixture was stirred for an additional 15 min to ensure complete precipitation. The pH was then raised to 7.0 by dropwise addition of 10% NaOH solution for 30 minutes. After stirring for a further 30 minutes, the coated pigment was separated from the supernatant reaction solution by filtration and washed until salt-f...

Embodiment 2-

[0103] Example 2- with SiO 2 (50nm) and iron oxide coated (100nm) aluminum flakes

[0104] First, using tetraethyl orthosilicate (TEOS), 60 g of SiO 2 Coated on a 10g Al flake (thickness (t 50 ) between 10 nm and 20 nm, d50 = 15 μm). In a round bottom flask with reflux condenser and stirrer, these Al flakes were mixed with 500 ml of deionized water and heated to 75 °C with stirring. The pH was adjusted to 3.2 by adding 10% NaOH solution. The reaction mixture was mixed with 650 g of 40% FeCl 3 The solution was mixed and the pH was kept essentially constant at 3.2 by simultaneous addition of 10% NaOH solution. Add FeCl 3 After the solution was complete, the mixture was stirred for an additional 15 min to ensure complete precipitation. The pH was then raised to 7.0 by dropwise addition of 10% NaOH solution for 30 minutes. After stirring for a further 30 minutes, the coated pigment was separated from the supernatant reaction solution by filtration and washed until free o...

Embodiment 3-

[0106] Example 3- with SiO 2 (15nm) and iron oxide coated (100nm) aluminum flakes

[0107] First, using tetraethylorthosilicate (TEOS), 10 g of SiO 2 Coated on a 10g Al sheet (thickness (t 50 ) between 20 nm and 30 nm, d50 = 20 μm). In a round bottom flask with reflux condenser and stirrer, these Al flakes were mixed with 500 ml of deionized water and heated to 75 °C with stirring. The pH was adjusted to 3.2 by adding 10% NaOH solution. The reaction mixture was mixed with 400 g of 40% FeCl 3 The solution was mixed and the pH was kept essentially constant at 3.2 by simultaneous addition of 10% NaOH solution. Add FeCl 3 After the solution was complete, the mixture was stirred for an additional 15 min to ensure complete precipitation. The pH was then raised to 7.0 by dropwise addition of 10% NaOH solution for 30 minutes. After stirring for a further 30 minutes, the coated pigment was separated from the supernatant reaction solution by filtration and washed until free of...

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Abstract

The invention relates to semitransparent pearlescent pigments, to methods for producing same, and to the use of such pearlescent pigments, wherein the pearlescent pigments are monolithically constructed substrate platelets composed of a metal oxide having an average thickness of 1 to 40 nm and a form factor, expressed by the ratio of the average size to the average thickness, of at least 80, whichare encased by at least one substantially transparent coating A composed of at least one low-refractive-index metal oxide and / or metal oxide hydrate, which has a refractive index of less than 1.8, and comprise at least one interference layer in the form of a coating B composed of at least one high-refractive-index metal oxide, which has a refractive index of at least 1.8.

Description

technical field [0001] The invention relates to a translucent pearlescent pigment, a manufacturing method of the translucent pearlescent pigment and the application of the pearlescent pigment. Background technique [0002] Lustrous pigments, in particular metallic luster pigments or metallic effect pigments, are widely used in many areas of the art. They are used, for example, in color paints, printing inks, liquid inks, plastics, glass, ceramic products and decorative cosmetic preparations. Of particular economic interest is the use of metallic luster pigments in automotive finishing. Due to their non-reproducible optical effects, they are also used in the production of counterfeit-proof securities and documents such as banknotes, cheques, bank cards, credit cards, immigration cards and tickets. They are recognized in particular by their attractive and floppy color impression (goniochromism) and their metallic luster. [0003] With conventional pigments, the color impres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/40C09C3/06
CPCC01P2004/04C01P2004/54C09C2200/1004C09C2200/1054C09C2200/301C09C2200/302C09C2200/303C09C2220/106C09C1/0051C09D7/70C09C1/40C09C3/06C09D5/36C08K3/22C08K3/36C08K2003/2265A61K8/0262A61K8/26C01P2004/24C03C1/04C08K9/02C08K2003/2227C09C1/0009C09D11/037
Inventor 阿达贝尔特·胡贝尔法比安·皮希凯曼·希米楚
Owner SCHLENK METALLIC PIGMENTS GMBH
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