Rutile type high color saturation interference color pearlescent pigment and preparation method thereof

Abstract

The invention discloses a rutile type interference color pearlescent pigment with high color saturation degree. The rutile type interference color pearlescent pigment comprises a substrate and at least six oxide coating layers, wherein the multiple oxide coating layers are alternatively coated to the surface of the substrate; the refractive index of the first oxide coating layer is smaller than 1.8, the refractive index of the second oxide coating layer is greater than 2, the refractive index of the third oxide coating layer is larger than 2.0, the refractive index of the fourth oxide coatinglayer is smaller than 1.8, the refractive index of the fifth oxide coating layer is greater than 2.0, and the refractive index of the sixth oxide coating layer is greater than 2.0. Compared with the prior art, the rutile type interference color pearlescent pigment has the advantages that by coating the multiple oxide coating layers onto the surface of the substrate, the number of interfaces of different matters is increased, so that when the light rays encounter the interfaces of different matters in the propagation process, one part of light rays is refracted out, the other part of light raysis reflected out, the smoothness of each refraction layer is improved, and the reflection effect of mirror surface is improved; the technology of the preparation technology is simple, the operation is convenient, the obtained product is colorful, and the color saturation degree and purity are high.

Description

technical field [0001] The invention belongs to the technical field of pearlescent pigments. More specifically, the invention relates to a rutile type high-color-saturation interference color pearlescent pigment and a preparation method thereof. Background technique [0002] Pearlescent pigments are powder pigments formed by coating natural muscovite or synthetic mica or glass flakes with one or more layers of metal oxides on the surface of the core by a special chemical process, so that it has a structure The flat sandwich body that is very similar to natural pearls can decompose the composite light into various monochromatic lights like a prism during use, and form various interference colors through light interference, showing extremely beautiful pearls Gloss and metallic luster. The interference color of ordinary pearlescent pigments is with Fe 2 o 3 and TiO 2 The change of coverage rate shows gold, red, purple, blue, green and other hues, and it is the hue that appe...

AI Technical Summary

Problems solved by technology

The interference color of ordinary pearlescent pigments is with Fe 2 o 3 and TiO 2 The change of coverage rate shows gold, red, purple, blue, green and other hues, and it is the hue that appears in the first circle. Its saturation is not high and the color is not bright enough.

[0003] Pearlescent pigments with anatase structure have insufficient performance in heat resistance and weather resistance, and generally can only be used indoors or in occasions with mild environmental conditions, which limits their widespread use

Both rutile and anatase macroscopic crystals belong to the tetragonal crystal system, but there are obvious differences in the performance of pearlescent pigments.

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