Papi 94 Isocyanate Dow Chemical PU - Isocyanates >> MDI, diphenylmethane diisocyanate >> Polymeric MDI PAPI* 94 polymeric MDI is a polymethylene polyphenylisocyanate that contains MDI. This product's low viscosity, low functionality, increased diphenylmethane diisocyanate content and increased percentage of ortho-para isomers make PAPI 94 polymeric MDI highly versatile. This product also offers delayed gel times, which results in better flow into molds for semi-flexible and integral skin foams. Polymethylene polyphenylisocyanate that contains MDI. Possesses low viscosity, low functionality, increased diphenylmethane diisocyanate content and increased percentage of ortho-para isomers. Offers delayed gel times.