IFR-OP560 Reactive Non-Halogenated Phosphorus Polyol Flame Retardant | Clariant OP560 Direct Substitute IFR‑OP560 is a high‑performance non‑halogen phosphorus‑containing polyol engineered as a functional equivalent replacement for Clariant Exolit OP560. As a genuine reactive flame‑retardant component, it chemically bonds into polyurethane polymer chains during polymerization rather than merely blending as a free additive. This covalent integration eliminates undesired