Metal complexes of zinc, copper, cobalt and nickel and N β hydroxyalkylated or γ aminoalkylated {HEAD ~ α aminocarboxylic acids} which are substituted at {TAIL ~ the α carbon atom} have excellent heat resistance, in particular a good heat resistance under oxydative influences 
are substituted at
Metal complexes of zinc , copper , cobalt and nickel and N β hydroxyalkylated or γ aminoalkylated { HEAD ~ α aminocarboxylic acids } which are substituted at { TAIL ~ the α carbon atom } have excellent heat resistance , in particular a good heat resistance under oxydative influences
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH