Process and apparatus for the preparation of a reaction mixture for the production of plastic foams

摘要

The instant invention relates to a process and apparatus for the preparation of a reaction mixture for the production of foam materials from at least two components, wherein one of the components, before it is mixed with the remaining components to form the reaction mixture, is passed through a constriction at a predetermined flowrate. The constriction produces a zone of reduced pressure and a gas is fed into the reduced pressure zone.