Preparation and powder properties of zinc phosphates with additives

In this work, zinc phosphates were prepared from zinc nitrate and phosphoric acid as a novel white pigment for use in cosmetics. The chemical composition, powder properties, photocatalytic activity, color phase, moisture retention, and smoothness of the zinc phosphates were studied. The obtained materials had a Zn/P ratio of about 1.5, which corresponds to zinc orthophosphate Zn3(PO4)2. Spherical particles were formed in a sample prepared using sodium lactate and glycerin, and in a sample prepared using urea, sodium lactate, and glycerin. The photocatalytic activity of these zinc phosphate particles was too less to protect the sebum on the skin. The materials obtained and their thermal products showed a high reflectance within the range of ultraviolet and visible light at 100 °C. The slipping resistance and roughness of the powder decreased as a result of the addition of sodium lactate.