Method for removing, condensing and collecting propellants from foam materials

A method for removing, condensing and collecting propellants from foam products, which method involves the use of a closed container in which a mechanical decomposition of the product is effected, said method comprising the steps of (a) mechanically decomposing a foam product which contains a propellant to liberate propellant from the product, and (b) collecting the liberated propellant, wherein the mechanical decomposition of the product and the liberation of the propellant is effected inside a cup-shaped process container having the closed part of the cup turned upwardly and the open part of the cup placed below the surface of a liquid medium under or in which liquid medium the decomposition and liberation is effected.