Di-esters or di-amides of N,N'-di-(hydroxy-alkyl)-or N,N'-di-(amino-alkyl)-piperazines and compositions of thermoplastic synthetic polymers containing them.

摘要

N,N min -Di-(hydroxy-phenyl)-derivatives of piperazine having the general formula:
<CHEM>
are disclosed. These compounds are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation.
<??>Polymeric compositions stabilized with said compounds are also disclosed.