Method of decreasing the UV light degradation of polymers

摘要

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, R¹⁹, R²⁰ and R²¹ are the same or different and are selected from the group consisting of C₁-C₃₀ alkyl, C₃-C₈ cycloalkyl, substituted alkyl, substituted cycloalkyl, ester, aryl, heteroaryl, heterocycloalkyl, substituted aryl, substituted heteroaryl, substituted heterocycloalkyl, and amino; R¹⁷ and R²³ are the same or different and are selected from the group consisting of C₁-C₃₀ alkyl, C₃-C₈ cycloalkyl, substituted alkyl, substituted cycloalkyl, ester, aryl, heteroaryl, heterocycloalkyl, substituted aryl, substituted heteroaryl, substituted heterocycloalkyl, cyano, and amino; R¹⁸ and R²² 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.