Stabilizing mixtures for organic polymers comprising a pyrazolone, an organic phosphite or phosphonite and a hindered phenol

摘要

Stabilizing mixtures for organic polymers comprising:a) at least one compound belonging to the group of pyrazolones;b) at least one compound belonging to the group of organic phosphites or phosphonites;c) at least one compound belonging to the group of sterically hindered phenols; andd) at least one compound belonging to the group of sterically hindered amines.The above mixtures are useful in the stabilization to degradation caused by oxygen, heat and/or light, of organic polymers.