Polyvalent metal salts of sulphonted derivatives of benzylidenecamphor and their use for protecting the skin against ultraviolet radiation
AssigneeL'oreal
InventorsGerard Lang, Serge Forestier, Claudine Morie, Alain Lagrange
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Abstract
Polyvalent metal salt of a sulphonated derivative of benzylidenecamphor having the general formula: ##STR1## in which M.sup.n+ denotes a polyvalent metal cation in which n is equal to 2, 3 or 4; and One of the symbols X.sub.1 or X.sub.2 denotes a hydrogen atom, the other denoting one of the following radicals Y.sub.1 Y.sub.2 : ##STR2## where M.sup.n+ has the same meaning as above. Cosmetic composition screening out UV rays of wavelengths 280-380 nm, containing the compound of formula (I) as well as, optionally, other sunscreens.
Claims13
A polyvalent metal salt of a sulphonated derivative of benzylidene camphor of formula (I):
- ##STR7## wherein M.sup.n+ is a polyvalent metal cation in which n is 2, 3, or 4;
- one of X.sub.1 and X.sub.2 is hydrogen and the other is Y.sub.1 or Y.sub.2 ;
- ##STR8## and said salts are insoluble in water.
Dependencies are inferred from the claim text.