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 ran and about 50-200 nm.

主权项

1. A powder sunscreen ingredient for cosmetics, comprising
(a) as a UVB attenuator, zinc oxide particles having a primary particle size between 10 and 50 nm, and (b) as a UVA attenuator, zinc oxide having secondary particle sizes ranging between 35 and 120 nm.