Pearlescent pigment applied as car spray paint and preparation method thereof

Abstract

The invention discloses a pearlescent pigment applied as car spray paint and a preparation method thereof. The pearlescent pigment is characterized in that the pigment is a pearlescent pigment coated with rutile TiO2, the external of an employed substrate material is coated with a layer of a titanium dioxide film, and also the external of the titanium dioxide film is coated with a coloring agent for forming a metal oxide composite coating; the coloring agent is ferric oxide; and the pearlescent pigment coated with rutile TiO2 employs granular mica as the substrate material. The pearlescent pigment coated with rutile TiO2 is directly prepared according to the following step: preparing a mica suspension by employing deionized water, controlling the pH value, adding a TiCl4 solution with the concentration of 20-25%, at the temperature of 80 DEG C, heating with stirring for reacting, filtering, washing, drying and calcining at 700 DEG C, and performing surface modification processing. The beneficial effects comprise that the pearlescent pigment provided by the invention has the effect of changing color along with angle variation, is relatively good in product brightness and color saturation, is substantially improved in brightness and chroma, is relatively high in stability, does not fade at a relatively high temperature, and is especially applicable as automobile spray paint.

Description

technical field [0001] The invention relates to a pearlescent pigment, in particular to a pearlescent pigment for car spray paints which will not fade even at relatively high temperatures and a preparation method thereof. Background technique [0002] Pearlescent pigments have high heat resistance and weather resistance, have the flash effect of metallic pigments, and can produce the soft color of natural pearls. They are widely used in various fields, such as coatings for automobiles, motorcycles, and bicycles. [0003] However, the current research on high-grade pearlescent pigments in my country still cannot meet the needs of the market, especially most of the pearlescent pigments used in automotive spray paints need to be imported from abroad, and the price is very expensive. In particular, the preparation method is cumbersome, has many steps, the reaction process takes a long time, is difficult to control and realize industrialization; the interference effect between th...

AI Technical Summary

Problems solved by technology

[0003] However, the current research on high-grade pearlescent pigments in my country still cannot meet the needs of the market, especially the pearlescent pigments used in automotive spray paints mostly need to be imported from abroad, and the price is very expensive

In particular, its preparation method is cumbersome, with many steps, the reaction process takes a long time, it is difficult to control and realize industrialization; the interference effect between the layers of the finished pigment product is weak, and it is easy to fade under high temperature conditions.

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