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.