Inventors:
Craig A. Bonda - Wheaton IL
Peter J. Marinelli - Bartlett IL
Yin Z. Hessefort - Naperville IL
Jagdish Trivedi - Woodridge IL
Gary Wentworth - Chicago IL
Assignee:
The C.P. Hall Company - Chicago IL
International Classification:
A61K 742
A61K 744
A61K 700
Abstract:
A sunscreen composition containing a UV-A dibenzoylmethane derivative, such as 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane (PARSOL. RTM. 1789), and a stabilizer for the dibenzoylmethane derivative having formula (I) or (II), or mixtures: ##STR1## wherein each R. sup. 1, same or different, is an alkyl group having 1 to 22 carbon atoms, a diol having the structure HO--R. sup. 2 --OH, or a polyglycol having the structure HO--R. sup. 3 --(--O--R. sup. 2 --). sub. m --OH, wherein R. sup. 2 and R. sup. 3, same or different, are each an alkylene group, straight chain or branched, having 1 to 6 carbon atoms, and wherein m and n are each 1 to about 100, or a mixture thereof. These diesters and polyesters of formula (I) or (II) are quite effective in stabilizing the dibenzoylmethane derivative UV-A filter compounds making them more effective, and effective for longer periods of time.