PROCESS AND DEVICE FOR PREPARING FOAM USING CARBON DIOXIDE DISSOLVED UNDER PRESSURE

摘要

The invention concerns a process for preparing foamed materials from two-component reactive plastics materials using carbon dioxide as expanding agent and by mixing at least one of the reactive components with carbon dioxide under pressure and generating a mixture containing liquid carbon dioxide, mixing with the other reactive component, expansion and curing of the plastics material. According to the invention, the second mixture containing carbon dioxide is expanded whilst being repeatedly separated numerous times into a plurality of individual flows under the effect of frequently changing shearing speeds, which have maximum values of at least 200/sec, being imposed.