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