Substituted triazines with phosphonyl group as antioxidants for elastomersand their compounds

A number of substances with a triazinic. structure provide antioxidant prop erties, but they have been less studied and used in elastomer processing. T he presence of thiol groups also allowed the grafting of the triazinic. ant ioxidant on the chain of the unsaturated elastomer during processing, vulca nization and/or the oxidative process. We have evaluated the protective cap acity of some substituted triazines both in elastomer matrix and in vulcani zates. Two kinds of triazines, with aminophenolic and phosphonic substituen ts, have been evaluated for their protective action in diene elastomers as such and in simplified recipe with NR matrix. In elastomers, the triazinic component with one phosphonic group has a superior protective capacity to t hat of triazine substituted with two phosphonic groups. (C) 2001 Elsevier S cience Ltd. All rights reserved.