PROCESS FOR THE PREPARATION OF OLIGOMERIC POLYESTER AMIDES CONTAINING STERICALLY HINDERED AMINO MOIETIES

摘要

Oligomeric esteramides having recurring structural units of the formula IMAGE where G is a hindered amine radical of formula I or II IMAGE in which R1 is hydrogen or alkyl having 1 to 4 carbon atoms, R2 is hydrogen, alkyl having 1 to 12 carbon atoms, allyl, benzyl, acetyl, acryloyl or cyano, Z1 is a direct bond, -NHCH2CH2-, -NHCH2CH2CH2- or -OCH2CH2-, Z2 is ethylene or trimethylene, E is a divalent aliphatic, aromatic or alicyclic radical and L is unsubstituted or substituted alkylene, are useful light stabilizers for plastics.