ZINC OXIDE POWDER BLENDS, THEIR PRODUCTION AND USE

摘要

This disclosure provides sunscreen products that contain metal oxide powders having discrete size distributions. Metal oxide powders include, for example, zinc oxide and titanium dioxide. Sunscreen products made in accordance with the principles of this disclosure contain metal oxide powders having primary particle sizes of about 10-30 nm and about 50-200 nm.

主权项

1. A sunscreen product comprising a dispersion of a first zinc oxide powder having a first primary particle size and capable of attenuating ultraviolet radiation, and a second zinc oxide powder having a second primary particle size and capable of attenuating ultraviolet radiation, wherein said first and second primary particle sizes provide a bimodal particle size distribution and wherein said sunscreen product is substantially transparent to visible light.