Method of decreasing the UV light degradation of polymers
View Patent ↗A method of decreasing the UV light degradation of a UV-light degradable polymer comprising adding to said polymer an effective amount of a compound of formula (IX): wherein, R 19 , R 20 and R 21 are the same or different and are selected from the group consisting of C 1 -C 30 alkyl, C 3 -C 8 cycloalkyl, substituted alkyl, substituted cycloalkyl, ester, aryl, heteroaryl, heterocycloalkyl, substituted aryl, substituted heteroaryl, substituted heterocycloalkyl, and amino; R 17 and R 23 are the same or different and are selected from the group consisting of C 1 -C 30 alkyl, C 3 -C 8 cycloalkyl, substituted alkyl, substituted cycloalkyl, ester, aryl, heteroaryl, heterocycloalkyl, substituted aryl, substituted heteroaryl, substituted heterocycloalkyl, cyano, and amino; R 18 and R 22 are the same or different and are selected from the group consisting of substituted diphenylmethylene, unsubstituted diphenylmethylene, substituted 9H-fluorene, and unsubstituted 9H-fluorene; t and u are each in the range of 1 to 100; s is in the range of 0 to 100; and a, b, c, and d are each in the range of 0 to 4.
1. A method of decreasing the UV light degradation of a UV-light degradable polymer comprising adding to said polymer an effective amount of a compound of formula (IX):
wherein, R 19 , R 20 and R 21 are the same or different and are selected from the group consisting of C 1 -C 30 alkyl, C 3 -C 8 cycloalkyl, substituted alkyl, substituted cycloalkyl, ester, aryl, heteroaryl, heterocycloalkyl, substituted aryl, substituted heteroaryl, substituted heterocycloalkyl, and amino; R 17 and R 23 are the same or different and are selected from the group consisting of C 1 -C 30 alkyl, C 3 -C 8 cycloalkyl, substituted alkyl, substituted cycloalkyl, ester, aryl, heteroaryl, heterocycloalkyl, substituted aryl, substituted heteroaryl, substituted heterocycloalkyl, cyano, and amino; R 18 and R 22 are the same or different and are selected from the group consisting of substituted diphenylmethylene, unsubstituted diphenylmethylene, substituted 9H-fluorene, and unsubstituted 9H-fluorene; t and u are each in the range of 1 to 100; s is in the range of 0 to 100; and a, b, c, and d are each in the range of 0 to 4.
2. The method of claim 1 , wherein R 19 , R 20 and R 21 are selected from the group consisting of C 1 -C 15 branched chain alkyl.
3. The method of claim 1 , wherein R 17 and R 23 are the same and are cyano.
4. The method of claim 1 , wherein said compound of formula (IX) is present in a range of about 0.05% to about 25% by weight of the total weight of the composition.
5. The method of claim 4 , wherein said compound of formula (IX) is present in a range of about 0.1% to about 10% by weight of the total weight of the composition.
6. The method of claim 1 , wherein the effective amount of the compound of formula (IX) is in the range of 0.05% to 25%, based on the total weight of UV light-degradable polymer.
7. The method of claim 1 , wherein the UV light-degradable polymer is PVC.
8. The method of claim 7 , wherein the PVC is in the form of a film.
9. A composition that does not include a dibenzoylmethane compound, comprising a UV light-degradable polymer and 0.05% to 25%, based on the total weight of UV light-degradable polymer, of a compound of formula (IX):
wherein, R 19 , R 20 and R 21 are the same or different and are selected from the group consisting of C 1 -C 30 alkyl, C 3 -C 8 cycloalkyl, substituted alkyl, substituted cycloalkyl, ester, aryl, heteroaryl, heterocycloalkyl, substituted aryl, substituted heteroaryl, substituted heterocycloalkyl, and amino; R 17 and R 23 are the same or different and are selected from the group consisting of C 1 -C 30 alkyl, C 3 -C 8 cycloalkyl, substituted alkyl, substituted cycloalkyl, ester, aryl, heteroaryl, heterocycloalkyl, substituted aryl, substituted heteroaryl, substituted heterocycloalkyl, cyano, and amino; R 18 and R 22 are the same or different and are selected from the group consisting of substituted diphenylmethylene, unsubstituted diphenylmethylene, substituted 9H-fluorene, and unsubstituted 9H-fluorene; t and u are each in the range of 1 to 100; s is in the range of 0 to 100; and a, b, c, and d are each in the range of 0 to 4.
10. The composition of claim 9 , wherein R 19 , R 20 and R 21 are selected from the group consisting of C 1 -C 15 branched chain alkyl.
11. The composition of claim 9 , wherein R 17 and R 23 are the same and are cyano.