Photoabsorbing, highly conjugated compounds of cyanoacrylic esters, sunscreen compositions and methods of use
View Patent ↗Novel derivatives of α-cyano-β-naphthyl acrylates, sunscreen compositions including one or more α-cyano-β-naphthyl acrylate derivatives are described herein. Also disclosed are methods for stabilizing a sunscreen composition and methods of filtering out ultra-violet light from a substrate by the addition of one or more of the foregoing α-cyano-β-naphthyl acrylate derivatives.
1. A method of absorbing ultraviolet radiation having a wavelength in the range of about 320 nm to about 400 nm and photostabilizing a dibenzoylmethane derivative, comprising the step of adding a photostabilizing amount of a compound of formula (I) to a composition comprising a dibenzoylmethane derivative:
wherein R 1 is C 1 -C 50 alkyl; R 2 is a C 1 -C 50 alkyl and
exposing said composition to ultraviolet radiation having a wavelength in the range of about 320 nm to about 400 nm.
2. The method of claim 1 , wherein said dibenzoylmethane derivative is selected from the group consisting of 2-methyldibenzoylmethane; 4-methyldibenzoylmethane; 4-isopropyldibenzoylmethane; 4-tert-butyldibenzoylmethane; 2,4-dimethyldibenzoylmethane; 2,5-dimethyldibenzoylmethane; 4,4′-diisopropyldibenzoylmethane; 4,4′-dimethoxydibenzoylmethane; 4-tert-butyl-4′-methoxydibenzoylmethane; 2-methyl-5-isopropyl-4′-methoxydibenzoylmethane; 2-methyl-5-tert-butyl-4′-methoxydibenzoylmethane; 2,4-dimethyl-4′-methoxydibenzoylmethane; 2,6-dimethyl-4-tert-butyl-4′-methoxydibenzoylmethane, and combinations thereof.
3. A method of protecting a surface from ultraviolet radiation having a wavelength in the range of about 320 nm to about 400 nm comprising topically applying to said surface, in an acceptable carrier, a composition comprising a dibenzoylmethane derivative and a compound of formula (I):
wherein R 1 is C 1 -C 50 alkyl; R 2 is a C 1 -C 50 alkyl and
exposing said composition to ultraviolet radiation having a wavelength in the range of about 320 nm to about 400 nm.
4. The method of claim 3 , wherein said surface is human skin and said carrier is a cosmetically acceptable carrier.
5. A method of absorbing ultraviolet radiation having a wavelength in the range of about 320 nm to about 400 nm and photostabilizing a dibenzoylmethane derivative, comprising the step of adding a photostabilizing amount of a compound of formula (I) to a composition comprising a dibenzoylmethane derivative:
wherein R 1 is C 1 -C 50 alkyl; R 2 is a C 1 -C 50 alkyl and
exposing said composition to ultraviolet radiation having a wavelength in the range of about 320 nm to about 400 nm, wherein said compound of formula (I) exhibits a greater absorbance of ultraviolet radiation having a wavelength in the range of about 320 nm to about 400 nm than ultraviolet radiation having a wavelength in the range of about 290 nm to about 320 nm.