Process for the preparation of polyurethane (urea) masses...

C - Chemistry – Metallurgy – 08 – G

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C08G 18/10 (2006.01) C08G 18/08 (2006.01) C08G 18/50 (2006.01) C08G 18/80 (2006.01)

Patent

CA 2031094

PROCESS FOR THE PREPARATION OF POLYURETHANE (UREA) MASSES WHICH CONTAIN FOAM ABSTRACT OF THE DISCLOSURE 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.

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