MANUFACTURE OF POLYURETHANE-UREA LUMP CONTAINING FOAM

摘要

The present invention is directed to a process for the preparation of foam-containing polyurethane (urea) masses comprising reacting an isocyanate prepolymer containing cation groups with water in the presence of fillers. The isocyanate prepolymer is prepared by first i) reacting a polyisocyanate with a first polyol which contains partly or completely quaternized tertiary nitrogen, said polyol being prepared by reacting a tertiary amine containing compound with from 3 to 8 moles of propylene oxide per mol of nitrogen to thereby form a semi-isocyanate prepolymer and then ii) reacting said semi-isocyanate prepolymer with a second polyol different from said first polyol, to form said isocyanate prepolymer.