Isocyanate Market by Type of Isocyanate (Methylene Diphenyl Diisocyanate (MDI), Toluene Diisocyanate (TDI), Aliphatic Isocyanate, Isophorone Diisocyanate (IPDI), and Others), Type of Formulation (Prepolymers, Oligomers, and Monomers), Purity Grade (Technical Grade and Specialty Grade), Application, End Use Industry, Geographical Regions, and Key Players – Trends and Forecasts 2026-2040