Photostabilizers, UV absorbers, and methods of photostabilizing a sunscreen composition
View Patent ↗Derivatives of fluorene, including ester derivatives of cyano(9H-fluoren-9-ylidene) acetic acid, and sunscreen compositions including a mixture of a photoactive compound and an ester derivative of cyano(9H-fluoren-9-ylidene) acetic acid are disclosed herein. Also disclosed are methods for terminating a polymer chain with an ester derivative of cyano(9H-fluoren-9-ylidene) acetic acid and methods of filtering out ultra-violet light from a substrate by the use of one or more such derivatives.
1. A compound of formula (III),
wherein R 5 is selected from the group consisting of C 3 -C 30 alkyl, C 3 -C 8 cycloalkyl, substituted alkyl, hydroxyalkyl, substituted hydroxyalkyl, ether, substituted ether, substituted cyoloalkyl, aryl, substituted aryl, and amino; R 29 and R 30 are the same or different and are selected from the group consisting of hydrogen, C 1 -C 30 alkyl, C 3 -C 8 cycloalkyl, substituted alkyl, hydroxyalkyl, substituted hydroxyalkyl, ether, substituted ether, hydroxyl, alkoxy, halogen, cyano, imide, urethane, amide, and amino; and m and n are each in the range of 0 to 4.
2. The compound of claim 1 , wherein R 5 is selected from C 3 -C 20 branched chain alkyls.
3. The compound of claim 1 , wherein R 5 is selected from C 1 -C 30 hydroxyalkyls.
4. The compound of claim 3 , wherein R 5 is selected from C 2 -C 8 hydroxyalkyls.
5. The compound of claim 4 , wherein the alkyl of said C 2 -C 8 hydroxyalkyls is selected from the group consisting of CH 2 CH 2 , CH 2 CH 2 CH 2 , CH 2 CH 2 CH 2 CH 2 , CH 2 CH(CH 3 )CH 2 , and CH 2 C(CH 3 ) 2 CH 2 .
6. A method of protecting a surface from ultraviolet radiation compxising topically applying to said surface; in a cosmetically acceptable carrier, a compound of formula (XI):
wherein R 5 is selected from the group consisting of C 1 -C 30 alkyl, C 3 -C 8 cycloalkyl, substituted alkyl, hydroxyalkyl, substituted hydroxyalkyl, ether, substituted ether, substituted cycloalkyl, aryl, substituted axyl, and amino; R 29 and R 30 are the same or different and are selected from the group consisting of hydrogen, C 1 -C 30 alkyl, C 3 -C 8 cycloalkyl, substituted alkyl, hydroxyalkyl, substituted hydroxyalkyl, ether, substituted ether, ester, aryl, substituted aryl, hydroxyl, alkoxy, halogen, cyano, imide, urethane, amide, and amino; andm and n are each in the range of 0 to 4.