C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
117/195, 400/400
C09D 175/04 (2006.01) C08G 18/08 (2006.01) C08G 18/10 (2006.01) C08G 18/28 (2006.01) C08G 18/80 (2006.01) C14C 9/00 (2006.01) D06M 15/564 (2006.01) D06N 3/14 (2006.01)
Patent
CA 1336791
The present invention is directed to coating compositions (pastes) containing a) about 20 to 90% by weight of an aqueous polyurethane dispersion which has a solids content of about 20 to 60% and wherein the polyurethane is rendered hydrophilic by carboxylate groups, sulphonate groups, pendant polyether chains having oxy- ethylene units, terminal polyether chains having oxyethylene units or mixtures thereof, b) about 0.1 to 5% by weight of a water-soluble, polymeric thickening agent for aqueous polyurethane dispersions which is not a polyurethane and which is free from carboxyl groups, c) about 3 to 80% by weight of water-immiscible organic solvent which is not a solvent for polyurethanes dispersed in water and which has a boiling point up to 250°C, d) about 0.1 to 5% by weight of a cross-linking agent for the polyurethane dispersed in water which does not contain free isocyanate groups and e) about 0.1 to 5% by weight of a hydrophilic polyisocyanate which promotes the adhesion of the coating composition to substrates and is a cross-linking agent for the polyurethane dispersed in water, the sum of the percentages of a) + b) + c) + d) + e) being 100, based on components a) - e). The present invention is also directed to the use of these coating compositions for coating substrates, preferably made of textile or leather, by the direct or transfer process, using the evaporation coagulation technique.
613905
Langel Rolf
Schroer Walter
Thoma Wilhelm
Aktiengesellschaft Bayer
Langel Rolf
Schroer Walter
Swabey Ogilvy Renault
Thoma Wilhelm
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