1. Das Di-Isocyanat-Polyadditionsverfahren (Polyurethane)
2. www.isopa.org Isopa European Diisocyanate and Polyol Producers Association Safety Information– Properties Hazards and Safety Information for MDI and TDI.
3. Sources: company press releases journals and news channels e.g. PU Daily Chemical Week PU World PetroChem Plastics & Rubber News Plastics News ICIS News.
4. IHS Markit2021.