C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
117/195, 400/740
C08G 18/08 (2006.01) B05D 7/26 (2006.01) C08G 18/10 (2006.01) C08G 18/28 (2006.01) C08G 18/38 (2006.01) C08G 18/83 (2006.01) D06M 15/37 (2006.01)
Patent
CA 1261993
A PROCESS FOR THE PRODUCTION OF COATED SUBSTRATES ABSTRACT OF THE DISCLOSURE The present invention is directed to a process for the production of water- and solvent- resistant coated substrates by coating heat-resistant substrates with a solution or dispersion of an anionic group-containing polyisocyanate addition product in an aqueous solvent or dispersant and subsequently thermally treating the coating at a temperature of about 60 to 200°C, with evaporation or vaporization of the solvent or-dispersant and simultaneous cross linking of the polyisocyanate addition product which has been applied to the substrate, characterized in that incorporated anionic structural units corre- sponding to the formula Image are used in a quantity of about 5 to 1000 milliequivalents per 100 g of solids and the solids are based on reaction products of organic polyisocyanates with salts of cyanamide and bases selected from ammonia, primary and secondary amines having a minimum pKb value of 3.1, tertiary amines and mixtures thereof. The present invention also relates to the aqueous solutions or dispersions of anionically-modified polyisocyanate addition products.
494805
Dhein Rolf
Hajek Manfred
Kuchenmeister Rolf
Muller Hanns P.
Schafer Walter
Aktiengesellschaft Bayer
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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