C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 175/04 (2006.01) B05D 1/36 (2006.01) B05D 7/00 (2006.01) C08F 290/14 (2006.01) C08G 18/67 (2006.01) C08L 75/04 (2006.01) C09D 175/14 (2006.01)
Patent
CA 2137955
Aqueous binder dispersion is described, as well as a coating composition containing this dispersion and a use thereof, in particular for multicoat lacquer coatings. The dispersion contains 45 to 95 wt.% of one or more polyurethanes, and 5 to 55 wt.% of one or more polyurethane resins containing ionic groups free of urea and carbonate groups, obtained by preparing a polyurethane prepolymer by the reaction in an organic medium of one or more isocyanate-reactive compounds, reaction products containing free isocyanate groups, and polyisocyanates with at least two free isocyanate groups per molecule. The prepolymer thus-obtained is subjected to chain extension in the organic medium or after conversion into the aqueous phase with polyfunctional isocyanates with a free NCO group functionality of at least 1.8.
Brock Thomas
Wandelmaier Klaus
Herberts Gesellschaft Mit Beschrankter Haftung
Kirby Eades Gale Baker
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