Sulfides and Disulfides of s-Triazine and s-Heptazine: Flame Retardancy

Flame retardancy is a key property of polymer materials. One of the most efficient flame retardant mechanisms of a compound is the thermal release of species which are able to inhibit radical reactions occurring in a flame: socalled flame poisoning. Especially pure hydrogen-carbon-based polymers with a low charring tendency, such as polypropylene, and applications of these polymers which do not allow high flame retardant amounts, such as foils or foams, have to be protected against ignition by suitable flame retarding radical generators. Sulfur compounds, including organic disulfides, are one example.