| 摘要 |
A sunscreen composition containing a UV-A dibenzoylmethane derivative, such as 4-(1,1-dimethylethyl) -4'- methoxydibenzoylmethane (PARSOL® 1789), a nd a stabilizer for the dibenzoylmethane derivative having formula (I) or (II), o r 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 t he 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 diester s 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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