Photochromic ultra-violet ray shield powder, method of manufactu

Details Photochromic ultra-violet ray shield powder, method of manufactu Photochromic ultra-violet ray shield powder, method of manufactu

1996-08-12

1998-06-09

Dodson, Shelley A.

Drug, bio-affecting and body treating compositions

Topical sun or radiation screening, or tanning preparations

106436, 423610, 424 60, A61K 742, C09C 136, C01G 23047

Patent

active

057629153

ABSTRACT:
A photochromic ultra-violet ray shield material principally composed of titanium oxide particles, which have a specific surface area of 25 m2/g or above and also have .DELTA.E=5.ltoreq.A (discoloration degrees) and B (at restoration)<.DELTA.E=3, a method of manufacturing the same and a skin external preparation using the same. Both photochromic property and excellent ultra-violet ray shield effect are obtained.

REFERENCES:
patent: 3658539 (1972-04-01), Dantro
patent: 3709984 (1973-01-01), Dantro
patent: 3749764 (1973-07-01), Basque et al.
patent: 4505886 (1985-03-01), Cody et al.
patent: 5147629 (1992-09-01), Robb et al.

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