Patent ID: 7288583
Filing Date: 2007-10-30
Classification: C08K,Y10T

Abstract:
1. A method of protecting contents against the deleterious effects of ultraviolet radiation, which method comprises storing the contents in a clear or lightly colored rigid plastic container, which container comprises an effective stabilizing amount of one or more compounds selected from the group consisting of the durable hydroxyphenyl benzotriazole UV absorbers, wherein said benzotriazole UV absorbers are of formula (I), (II) or (III) wherein G G G E E n is 1 or 2, when n is 1, E E or straight or branched chain C 1 -C 24 alkyl which is interrupted by —O—, —S— or —NE 11 and which can be unsubstituted or substituted by —OH or —OCO-E 11 , C 5 -C 12 cycloalkyl which is unsubstituted or substituted by —OH, straight chain or branched C 2 -C 18 alkenyl which is unsubstituted or substituted by —OH, C 7 -C 15 aralkyl, —CH 2 —CHOH-E 13 or glycidyl, E E E wherein X is —O— or —N(E Y is —O— or —N(E Z is C m is zero, 1 or 2, p is 1, or p is also zero when X and Y are —N(E E wherein the symbols E 1 , G 2 , X, Z, m and p have the meanings defined above, and E 16 and E 17 independently of one another are hydrogen, C 1 -C 12 -alkyl, C 3 -C 12 -alkyl interrupted by 1 to 3 oxygen atoms, or is cyclohexyl or C 7 -C 15 aralkyl, and E 16 together with E 17 in the case where Z is ethylene, also forms ethylene, when n is 2, one of G E E or E 10 and E 11 with the two nitrogen atoms form a piperazine ring, E where E 7 and E 8 are independently hydrogen, alkyl of 1 to 18 carbon atoms or E 7 and E 8 together are alkylene of 4 to 6 carbon atoms, 3-oxapentamethylene, 3-iminopentamethylene or 3-methyliminopentamethylene, E E E E L is alkylene of 1 to 12 carbon atoms, alkylidene of 2 to 12 carbon atoms, benzylidene, p-xylylene, α,α,α′,α′-tetramethyl-m-xylylene or cycloalkylidene; and wherein the UV absorbers are incorporated into a coating applied to the outer surface of the container.