| abstract |
The electronically excited state energy (especially the singlet state energy from the retinoid compound) to be photostabilized is an alkoxy radical in the 4 (para) coordination of one of the phenyl rings having the chemical formula (I) (herein It has been found that it readily migrates to (accepts to) α-cyanodiphenyl acrylate compounds having a medium or less “alkoxychryrene”). Where one of R 1 and R 2 is a linear or branched C 1 -C 30 alkoxy radical, preferably C 1 -C 8 , more preferably methoxy, non-alkoxy The radical R 1 or R 2 is hydrogen and R 3 is a linear or branched C 1 -C 30 alkyl radical, preferably C 2 -C 20 . The alkoxycrylene compound of formula (I) significantly increases the light stability of the retinoid compound in the composition by at least 3 times and even 10 times or more. Since the ability of the alkoxycrylene compound to stabilize the retinoid compound is concentration-dependent, the amount of retinoid light stabilizing action increases with the concentration of the alkoxycrylene compound. |