Foam plastic from non-reusable pressurized containers

Composition of at least one isocyanate prepolymer, at least one catalyst for the reaction of the isocyanate group with the OH group, at least one blowing agent and at least one foam stabilizer for the production of foam plastics from disposable pressurized containers, characterized in that it in the pressure vessel remaining residual at least 1 day after the application has a content of diisocyanate monomers of less than 2.0 wt .-%, based on the residual contents of the emptied container.