Lupranate®M20S is a polymeric MDI with a functionality of approximately 2.7. Lupranate M20S is suitable for the production of rigid insulation foams by molding, spraying, and frothing. It is also used for rigid and semi-flexible integral skin foams, adhesives, sealants, elastomers, and high-resiliency flexible foams. Inlow catalyzed rigid urethane formulations, the foam rise time can be lengthened by 20-30%. The slower reactivity can be advanta- geous in applications such as large rigid foam panels or molded flexible foams. Appearance.............................................................dark brown liquid
NCO content, wt. %.....................................................................31.5
Viscosity @ 25°C, cps.................................................................200
Hydrolyzable chlorine, wt. %.......................................................0.035
Flash point, °C (COC).................................................................. 200
Density @ 25°C, g/cm3...............................................................1.23
Initial boiling point, 5 mm Hg, °C...................................................190
Vapor pressure @ 25 °C, mm Hg..............................................0.0002
