abstract |
A sunscreen concentrate in the form of a stable, uniform dispersion comprising, by weight: (a) about 30-65 % of ultrafine titanium dioxide or zinc oxide, or mixtures thereof, (b) about 30-70 % of an organic sunscreen agent, and (c) about 0.25-25 % of a dispersing aid which is polyvinylpyrrolidone alkylated with a C4-C36 alpha-olefin. |