C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
400/111, 400/550
C08J 3/02 (2006.01) C08G 18/32 (2006.01) C08G 18/70 (2006.01) C08G 18/80 (2006.01) C08L 75/04 (2006.01)
Patent
CA 1212793
16 ABSTRACT POLYUREA DISPERSIONS IN ORGANIC ISOCYANATES A dispersion of a polyurea in an aromatic polyisocyanate is prepared by mixing the polyisocyanate with one or more aliphatic diprimary diamines having (a) at least one amine group attached to a carbon atom having not more than one hydrogen atom attached thereto or (b) at least one amine group attached to a carbon atom which is itself attached to a carbon atom having not more than one hydrogen atom attached thereto, provided that both amine groups are not attached directly to separate rings of an alkylene-linked polycyclic aliphatic ring system. The reaction preferably takes place at a temperaure in the range 20°C to 60°C. The polyurea dispersion products are useful for manufacture of polyurethane foams and elastomers of superior physical properties.
436912
Hughes Jeffrey
Hynds John
Ballantyne Donald G.
Imperial Chemical Industries Plc
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