C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/146, 117/195
C08G 18/00 (2006.01) C08G 18/10 (2006.01) C08G 18/48 (2006.01) D06N 3/14 (2006.01)
Patent
CA 1320783
Mo-3114 LeA 25,654 POLYURETHANE UREAS ABSTRACT OF THE INVENTION The present invention is directed to polyurethane ureas which may be obtained by the reaction of a hydrophilic NCO prepolymer, which has been prepared from a polyhydroxy component based on about 9 to 100% by weight of a polyether containing about 30 to 100% by weight of ethylene oxide, or a mixture of this hydrophilic NCO prepolymer and a hydrophobic NCO prepolymer, the mixture containing ?30% by weight of the hydrophilic prepolymer, with an aldimine or ketimine-containing hardener mixture in the presence of water and organic solvents, approximately 30 to 70% of the NCO groups of the prepolymers being reacted with the amino groups of the hardener and the remainder reacting with water. The present invention is also directed to a process for the preparation of these polyurethane ureas and to coated substrates prepared from these polyurethane ureas. Mo-3114
584009
Pedain Josef
Pisaric Karl Heinz
Schroer Walter
Thoma Wilhelm
Traubel Harro
Aktiengesellschaft Bayer
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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