Self-opacifying aluminum phosphate particles for paint film pigmentation

Abstract

Opaque particles of aluminum phosphate can be obtained in two ways: self-opacification within drying latex films and thermal treatment at 500–700°C (which was previously described). Self-opacification is easily achieved and allows for extensive replacement of TiO2 as a white pigment, with a gain (in an acrylic latex) in the optical properties of the pigmented film.