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