C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
400/7412, 400/90
C08G 18/78 (2006.01) C08G 18/79 (2006.01) C09D 5/02 (2006.01) C09D 7/12 (2006.01) C09D 157/00 (2006.01)
Patent
CA 1287937
Mo-2815 LeA 24,025 USE OF POLYISOCYANATES OR POLYISOCYANATE MIXTURES AS ADDITIVES FOR AQUEOUS EMULSION PAINTS ABSTRACT OF THE DISCLOSURE The present invention is directed to a process for improving the coatings properties of aqueous emulsion paints having a binder based on homo or copolymers of olefinically unsaturated monomers substantially free from urethane groups by adding at least one organic polyisocyanate having a viscosity at 23°C of about 50 to 4000 mPa.s, wherein the organic polyisocyanate has aliphatically and/or cycloaliphatically bound isocyanate groups and an isocyanate functionality of at least 3, optionally in combination with other organic polyisocyanates containing aliphatically and/or cycloaliphatically bound isocyanate groups and having an isocyanate functionality of 2, provided that the average functionality is at least 2.2. The present invention is also directed to the ready for use aqueous emulsion paints prepared by the above process. Mo-2815 LeA 24,025
515673
Kubitza Werner
Mennicken Gerhard
Aktiengesellschaft Bayer
Kubitza Werner
Mennicken Gerhard
Swabey Ogilvy Renault
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