C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 133/08 (2006.01) C08G 18/08 (2006.01) C08G 18/62 (2006.01) C08K 5/29 (2006.01) C09D 175/04 (2006.01)
Patent
CA 2059570
Mo-3711 LeA 28,146 A PROCESS FOR COATING HEAT RESISTANT SUBSTRATES WITH TWO-COMPONENT STOVING COMPOSITIONS AND THE COATED SUBSTRATES PRODUCED THEREFROM ABSTRACT OF THE DISCLOSURE The present invention relates to a process for preparing a coated, heat resistant substrate by 1) coating the substrate with a coating composition containing a) a solution or dispersion containing a1) 100 parts by weight of at least one hydroxyl- functional polyacrylate resin in dissolved or dispersed form, wherein the resin has a hydroxyl value of 15 to 200 mg KOH/g solid resin, an acid value of 5 to 250 mg KOH/g solid resin and a total content of chemically incorporated carboxylate and/or sulfonate groups of 8 to 450 milliequivalents per 100 g of solids, a2) 25 to 395 parts by weight of water and a3) 5 to 125 parts by weight of at least one organic solvent having a boiling point or boiling range at 1013 mbar of 100 to 300°C and b) at least one organic polyisocyanate in a quantity corresponding to an equivalent ratio of isocyanate groups of component b) to isocyanate-reactive groups of component a1) of 0.7:1 to 3:1, and II) curing the coating composition at a temperature of 40 to 160°C. The present invention is also directed to the coated substrates obtained by this process.
Baecker Lothar
Dhein Rolf
Koehler Burkhard
Rettig Rainer
Reuter Knud
Aktiengesellschaft Bayer
Swabey Ogilvy Renault
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