Novel chalcone derivatives and ultraviolet absorbers comprising

Details Novel chalcone derivatives and ultraviolet absorbers comprising Novel chalcone derivatives and ultraviolet absorbers comprising

1984-11-09

1986-04-22

Helfin, Bernard

Drug, bio-affecting and body treating compositions

Topical sun or radiation screening, or tanning preparations

2604105, 560138, A61K 742, C07C 69017

Patent

active

045841900

ABSTRACT:
A chalcone derivative of the formula (I): ##STR1## in which R.sub.1 represents hydrogen or a methyl group, and R.sub.2 represents a linear or branched aliphatic hydrocarbon group having from 2 to 24 carbon atoms.
The derivative is effective in protecting the skin when made into ultraviolet absorbing agents including an anti-sunburn oil, since it has the maximum absorbing capacity at a wave length in the vicinity of 350 nm, does not irritate the skin and is highly compatible with a cosmetic base.

REFERENCES:
patent: 3479428 (1969-11-01), Bryce et al.
patent: 3751563 (1973-08-01), Richardson et al.
patent: 4279930 (1981-07-01), Hall et al.
Namariyama et al., Chem. Abstracts 91:166351u (1979), "Photosensitivity of Styryl Ketone Polymers".

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