Polyether-modified polyisocyanate mixtures having improved...

Details Polyether-modified polyisocyanate mixtures having improved... Polyether-modified polyisocyanate mixtures having improved...

C - Chemistry, Metallurgy

07

D

C07D 251/34 (2006.01) C07C 275/60 (2006.01) C07D 401/14 (2006.01) C07D 405/14 (2006.01) C08G 18/22 (2006.01) C08G 18/28 (2006.01) C08G 18/62 (2006.01) C08G 18/70 (2006.01) C08G 18/78 (2006.01) C08G 18/79 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2272361

The present invention relates to water dispersible polyisocyanate mixtures prepared from aliphatic, cycloaliphatic, araliphatic and/or aromatic diisocyanates and having a) an average isocyanate functionality of at least 2.0, b) a content of 5.0 to 25.0 wt.%, based on resin solids, of isocyanate groups (calculated as NCO; molecular weight = 42) and c) a content of 2 to 50 wt.%, based on resin solids, of ethylene oxide units calculated as C2H2O; molecular weight 44) incorporated within polyether chains containing an average of 5 to 35 ethylene oxide units, wherein at least 60 mole % of the polyether chains are connected via allophanate groups to two polyisocyanate molecules which are each prepared from at least two diisocyanate molecules. The present invention also relates to a process for the preparation of these water dispersible polyisocyanate

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