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Coated perlite flakes

A technology of perlite flakes and perlite, which is applied in the field of effect pigments and can solve problems such as unsuitable products

Active Publication Date: 2016-01-13
太阳化学私人有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Methods currently known in the art to prepare iron oxide-coated perlite flakes and standard methods of coating mica and glass flakes with iron oxide are not effective because the iron oxide layer tends to peel off the substrate making the product undesirable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] A slurry of 215 g of perlite (average particle size 30 μm) in 1785 mL of distilled water was heated to 83° C. and the pH was adjusted to 1.4 with HCl. Then add 50g of 20% SnCl at 3.2g / min 4 solution, the pH was maintained with NaOH. After stirring for 60 minutes, add 36 g of 40% TiCl at 3 g / min 4 solution, the pH was maintained with NaOH. The pH was then raised to 3.0 with NaOH, after which 39% FeCl was added at 1.2 g / min 3 solution, the pH was maintained with NaOH. Add 320g of FeCl 3 Afterwards, the slurry was filtered, washed and calcined at 850 °C. Such as figure 1 As shown, the resulting product has a bronze color.

Embodiment 2

[0087] In addition to adding 335g of FeCl 3 Otherwise, this example was carried out like Example 1. Such as figure 2 As shown, the obtained product has copper interference color.

Embodiment 3

[0089] In addition to adding 360g of FeCl 3 Otherwise, this example was carried out like Example 1. Such as image 3 As shown, the resulting product has a reddish-brown interference color.

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Abstract

The present disclosure relates to a method of making coated perlite flakes comprises: (i) providing perlite flakes; (ii) applying a layer of tin oxide on the perlite flakes to obtain tin oxide coated perlite flakes; (iii) applying a layer titanium dioxide on the tin oxide coated perlite flakes obtained in step (ii) to obtain titanium dioxide and tin oxide coated perlite flakes; and (iv) applying a layer of iron oxide to the titanium dioxide and tin oxide coated perlite flakes to obtain the coated perlite flakes. The present disclosure also relates to coated perlite flakes comprising: perlite flakes with layer of tin oxide, then a layer of titanium dioxide, and then a layer of iron oxide.

Description

field of invention [0001] The invention relates to effect pigments which are coated perlite flakes comprising perlite flakes with a tin oxide layer, then a titanium dioxide layer, then an iron oxide layer. Background of the invention [0002] Effect pigments are based on the use of layered substrates such as mica or perlite flakes which have been coated with a metal oxide layer. These pigments can exhibit a pearly luster due to the reflection and refraction of light and, depending on the thickness of the metal oxide layer, they can also exhibit interference color effects. [0003] DE 10 2005 025 609 discloses non-metallic pigment mixtures with high metallic brilliance for use, for example, in cosmetics, lacquers and colours, which comprise gold interference pigments and also silver-white, silver-gray and black-gray interference pigments. [0004] EP1469042 discloses a pigment mixture comprising a component A comprising effect pigments based on glass flakes and a component B...

Claims

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Application Information

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IPC IPC(8): C09C1/42C09C3/06C09D7/12C08K3/34
CPCC09C1/42C09C3/06C08K3/34C09C1/0021C09C1/0024C09C1/0039C01P2004/51C01P2004/61C01P2006/62C01P2006/65C01P2006/66C09C2200/102C09C2200/302C09C2200/304C09C2200/306C09C2220/106H01G9/2036C08K9/02C09D7/61C09C1/0015C09C1/28C09C3/063
Inventor S·A·约内斯
Owner 太阳化学私人有限公司
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