Bonding-free pearlescent pigment for electrostatic powder coating and preparation method thereof

The invention discloses a bonding-free pearlescent pigment for an electrostatic powder coating and a preparation method of the bonding-free pearlescent pigment, and particularly relates to the technical field of pearlescent pigment production.The bonding-free pearlescent pigment is modified through in-situ deposition of nano silicon dioxide, and the surface of a modified pearlescent pigment body can be uniformly and completely coated with the nano silicon dioxide; according to the pearlescent pigment, the powdering rate and the spraying effect of the pearlescent pigment in the powder coating electrostatic spraying process are improved, the surface of the pearlescent pigment body is coated with tin oxide and titanium dioxide, and various magic hues and luster are created by selectively reflecting, refracting and transmitting various colors of light with different wavelengths in natural light; according to the present invention, the sheet-shaped pearlescent pigment can form the film through electrostatic sprayi