Stable nanopigmented sunscreen/cosmetic compositions

Details Stable nanopigmented sunscreen/cosmetic compositions Stable nanopigmented sunscreen/cosmetic compositions

1995-02-21

1997-09-23

Dodson, Shelley A.

Drug, bio-affecting and body treating compositions

Topical sun or radiation screening, or tanning preparations

424 60, 514937, 514938, 514939, 514941, A61K 742

Patent

active

056701390

ABSTRACT:
Stable and homogeneous, topically applicable sunscreen/cosmetic compositions well suited for the photoprotection of human skin and/or hair against the damaging effects of UV-A and/or UV-B irradiation, particularly solar radiation, and which display excellent transparency on the skin, comprise a storage-stable, ultrafine oil-in-water emulsion resistant to phase separation/settling, of a photoprotecting effective amount of homogeneously and finely dispersed particulates of at least one inorganic nanopigment which comprises a metal oxide, for example titanium dioxide, as well as a stabilizing amount of at least one mixed silicate which comprises alkali and/or alkaline earth metals, and further wherein the average particle size of the globules comprising the oily phase of the emulsion characteristically ranges from 100 nm to 1,000 nm.

REFERENCES:
patent: 5032390 (1991-07-01), Iwaya et al.
patent: 5093099 (1992-03-01), Haishi et al.
patent: 5340567 (1994-08-01), Cole et al.

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