<i>ALCURE</i> 4147 Polymeric Isocyanate Curative Hexion Specialty Chemicals North America Polyurethane (PU) - Isocyanates >> IPDI, isophorone diisocyanate (cycloaliphatic) Coatings >> Powder Coatings Powder coating Alcure 4147 is a polymeric, aliphatic, uretdione, isocyanate curative based on IPDI. Alcure 4147 is designed for exterior use. Provides good flow, good overall performance and thick film capability. Non-emissive. Used in powder coatings. Polymeric, aliphatic, uretdione, isocyanate curative based on IPDI. Used in powder coatings for exterior applications. Provides good flow, good overall performance and thick film capability. Non-emissive in nature.