| abstract |
Derivatives of malonic acid substituted with groups containing a hindered phenol are disclosed. A preferred compound is di-noctadecyl-2,2-bis-(3'',5''-di-t-butyl-4''-hydroxybenzyl) malonate. The compounds are stabilizers suitable for stabilizing numerous substrates of organic material subject to oxidative deterioration, in particular polypropylene. Synergistic combinations of these compounds and dialkyl thiodipropionates are disclosed. |