ACYLATED HINDERED HEXAHYDROPYRIMIDINES AND THEIR USE AS LIGHTSTABILIZING AGENTS

摘要

An acylated, hindered hexahydropyrimidine of the formula wherein R1, R2, R3 and R4 may be the same or different independently of each other and are alkyl having 1 to 6 carbon atoms, when unsubstituted, or alkyl or aryl substituted; R5 and R6 may be the same or different and are hydrogen, or alkyl; R7 is selected from the group consisting of: alkyl having 1 to 20 carbon atoms, substituted alkyl where the alkyl without substitution has 1 to 20 carbon atoms and where substituents may be up to five lower alkyl groups, arylalkyl, cycloalkyl having 3 to 12 carbon atoms, aryl aryl substituted with 1 to 3 substituents seleted from the group consisting of: lower alkyl, lower alkoxy, and hydroxyl; wherein R9 is unsubstituted or substituted with alkyl, R10 is hydroxyl, lower alkoxy, phenoxy and the group and R8 is hydrogen, alkyl, substituted alkyl, arylalkyl, hydroxyl, oxyl and wherein R11 is unsubstituted or substituted alkyl.