| abstract |
COMPOUNDS CONTAINING ONE OR MORE ALKYLHYDROXYPHENYL GROUPS BONDED THROUGH CARBOALKOXY LINKAGES TO A NITROGEN ATOM OF A HETEROCYCLIC NUCLEUS CONTAINING AN IMIDODICARBONYL -(CO-NH-CO)- GROUP OR AN IMIDODITHIOCABONYL -(C(=S)-NH-C(=S))- GROUP HAVE BEEN PREPARED AND ARE EXTREMELY EFECTIVE STABILIZERS AGAINST THE DELETERIOUS EFFECTS OF OXYGEN, HEAT AND LIGHT FOR ORGANIC MATERIALS. THE STABILITY OF POLYMERIC COMPOSITIONS SUCH AS A-OLEFIN POLYMERS AND COPOLYMERS, ACETAL POLYMERS, POLYAMIDES, POLYESTERS AND POLYURETHANES IS MARKEDLY INCREASED BY THE ADDITION OF SMALL AMOUNTS OF THE COMPOUNDS THERETO. |