Photostable filtering cosmetic composition

Details Photostable filtering cosmetic composition Photostable filtering cosmetic composition

1994-11-01

1996-08-27

Dodson, Shelley A.

Drug, bio-affecting and body treating compositions

Topical sun or radiation screening, or tanning preparations

514938, A61K 742

Patent

active

055498868

ABSTRACT:
The invention relates to a photostable filtering emulsion containing in association, in the aqueous phase, a photostable filter with a wide absorption band constituted by partially or totally neutralized benzene-1,4-[di(3-methylidene-10-camphosulphonic)] acid, and in the oily phase a photostable system which filters the UV-A rays containing at least one of the following compounds: N-(2-ethylhexyl)-3-[(3'-methoxy-4'-n-butoxy)benzylidene]-10-camphosulphona mide (compound 2), 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane (compound 3) and 4-isopropyldibenzoylmethane (compound 4), these two latter compounds 3 and 4 being photochemically stabilized by at least one fat-soluble filter of .lambda..sub.max less than 330 nm chosen from the following benzylidene camphor derivatives: benzylidene camphor (compound 5), p-methylbenzylidene camphor (compound 6), N-(2-ethylhexyl)-4-(3'-methylidene camphor)benzene sulphonamide (compound 7) and 3-methoxy-4-n-butoxybenzylidene camphor (compound 8).
This composition is intended to protect the skin from UV rays of wavelengths between 280 and 380 nm.

REFERENCES:
patent: 4804531 (1989-02-01), Grollier
patent: 4837010 (1989-06-01), Hotta et al.
patent: 5384115 (1995-01-01), Bissett et al.
patent: 5393515 (1995-02-01), Grollier

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