DuPont™ Formacel® Z-4 (HFC-134a) is a nonflammable compound with zero ozone-depletion potential and negligible photochemical reactivity.
Formacel® Z-4 delivers superior quality and environmental performance to manufacturers of thermoset and thermoplastic foams. It is the preferred replacement for CFC- and HCFC- based foam expansion agents.
The use of Formacel® Z-4 in polyurethane and polyisocyanurate foams also offers many benefits: improved foam dimensional stability, better insulation value at low temperatures, and excellent compatibility with plastic liners in appliances.
The properties of Formacel® Z-4 make it an excellent foam expansion agent for extruded polystyrene foam insulation board.