Azo compounds containing hindered amine moieties with low basicity

Claim 1

A compound having in the same molecule a hindered amine moiety of low basicity and an azo group, said compound having the formula I E₁-N=N-E₂      (I) where E₁ is a radical of the formula where R₁ and R₂ are independently alkyl of 1 to 36 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, aralkyl of 7 to 20 carbon atoms, or R₁ and R₂ together are alkylene of 2 to 10 carbon atoms, or one of R₁ and R₂ is a group of formula II Y is -CN, -N₃, -COOT₁, -CONH₂, -OT₁, -ST₁, -OOH or -OH, G₁ and G₂ are independently alkyl of 1 to 4 carbon atoms, or G₁ and G₂ together are pentamethylene, X is -O-, -NH-, -NT₁- or T is formyl, -OT₁ or -OCOT₂, where T₁ is alkyl of 1 to 36 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, alkenyl of 3 to 18 carbon atoms, cycloalkenyl of 5 to 12 carbon atoms, aralkyl of 7 to 15 carbon atoms, a radical of a saturated or unsaturated bicyclic or tricyclic hydrocarbon of 7 to 12 carbon atoms or aryl of 6 to 10 carbon atoms or said aryl substituted by alkyl, T₂ is alkyl of 1 to 18 carbon atoms, alkoxy of 1 to 18 carbon atoms, phenyl or said phenyl substituted by hydroxy, alkyl or alkoxy; or amino or said amino mono- or disubstituted by alkyl or phenyl, and E₂ has the same meaning as E₁ or E₂ is alkyl of 1 to 36 carbon atoms, cycloalkyl of 5 to 12 carbon atoms or aralkyl of 7 to 20 carbon atoms, with the proviso that one of E₁ or E₂ must contain a group having a present.