Phosphoric diesters which absorb UV rays, method of preparing th

Details Phosphoric diesters which absorb UV rays, method of preparing th Phosphoric diesters which absorb UV rays, method of preparing th

1994-06-15

1996-04-09

Ivy, C. Warren

Drug, bio-affecting and body treating compositions

Topical sun or radiation screening, or tanning preparations

Aromatic acid or derivative containing

514844, 558174, 558179, 558182, A61K 742

Patent

active

055059368

ABSTRACT:
Phosphoric diesters having formula (1): ##STR1## wherein R.sup.1 is an acyl group having at least one phenyl group; R.sup.2 is a C.sub.2-12 linear or branched alkylene group which may optionally be inserted with an oxygen atom between carbon atoms thereof; L is a C.sub.2-40 linear or branched alkyl group which may optionally be inserted with an oxygen atom between carbon atoms thereof or the group R.sup.1 -O-R.sup.2 ; M is a hydrogen atom, an alkali metal ion, a metal ion of di- or higher valence, an ammonium group, an alkanolammonium group having 2 to 14 carbon atoms, C.sub.1-14 alkylammonium group; and n is the valence of M are useful UV absorbing compounds. The phosphoric diesters remain on the skin for long periods of time and exhibit lasting UV shielding effects. The compounds and the cosmetic compositions containing the compounds are very safe to the skin.

REFERENCES:
patent: 4670575 (1987-06-01), Kurosaki
patent: 4736051 (1988-04-01), Wakatsuki
patent: 5260051 (1993-11-01), Cho

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