METHOD FOR SEPARATING ISOCYANATE MONOMERS

摘要

The invention relates to a method for separating isocyanate monomers from isocyanate-containing mixtures by supplying the mixture in a solvent and dialyzing the dissolved mixture against the solvent by means of a permeable membrane having a pore size of 5 to 400 nm. Said method can be used especially for separating isocyanate monomers from prepolymers containing isocyanate groups for the production of adhesives, insulation foams and assembly foams.