Aqueous polyurethane-urea dispersions based on...

C - Chemistry – Metallurgy – 08 – L

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C08L 75/04 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2063937

Mo3593 MD-90-74-CT AQUEOUS POLYURETHANE-UREA DISPERSIONS BASED ON BIS-(4- ISOCYANATOCYCLOHEXYL)-METHANE ENRICHED IN THE TRANS,TRANS ISOMER AND COATINGS OR FILMS PREPARED THEREFROM ABSTRACT OF THE DISCLOSURE The present invention is directed to aqueous polyurethane-urea dispersions wherein the polyurethane-ureas are based on the reaction product of a) an isocyanate component comprising bis-(4-isocyanatocyclo- hexyl)-methane having an average trans,trans isomer content of at least 35% by weight, based on the weight of bis-(4-isocyanatocyclohexyl)-methane with b) an isocyanate-reactive component. The present invention is also directed to the films or coatings prepared from these aqueous polyurethane-urea dispersions. Mo3593

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