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Light stable sunscreen compositions containing dibenzoylmethane derivatives such as PARSOL 1789 and diesters or polyester light stabilizers of naphthalene dicarboxylic acid and sunscreen index (SPF) improvers
Light stable sunscreen compositions containing dibenzoylmethane derivatives such as PARSOL 1789 and diesters or polyester light stabilizers of naphthalene dicarboxylic acid and sunscreen index (SPF) improvers
A sunscreen composition containing a UV-A dibenzoylmethane derivative, such as 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane (PARSOL TM 1789), and a stabilizer for the dibenzoylmethane derivative having formula (I) or (II), or mixtures: wherein each R1, same or different, is an alkyl group having 1 to 22 carbon atoms, a diol having the structure HO-R2-OH, or a polyglycol having the structure HO-R3-(-O-R2-)m-OH, wherein R2 and R3, 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.
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