Amine antioxidants for rubber based on N-2-ethylhexyl-N'-Phenyl-n-phenylenediamine with increased stability and means of enhancing its stability

摘要

1. The amine antioxidant for the stabilization of rubbers based on N-2-ethylhexyl-N'-phenyl-n-phenylenediamine (8PFDA) used in combination with antiozonants and protivoutomitelyami class N-phenyl-N'-alkyl-n-phenylenediamine to increase their efficiency obtained in the form of non-dusting pulverulent compositions by sorption 8PFDA fine mineral fillers in rubber during mixing or mastication with fillers in a ratio of from 30:70 to 70:30, characterized in that for increasing the storage stability of powder compositions proposed contain addition of 1 to 5% mineral oil or from 1 to 3 wt.% of the antioxidant class spatially shielded phenols. ! 2. A method for improving the storage stability of powder compositions 8PFDA specified in claim 1 with or without additives, is to eliminate the contact of the compositions with the outside air by means of a sealed package.