Process for the preparation of organic polyisocyanates...

Details Process for the preparation of organic polyisocyanates... Process for the preparation of organic polyisocyanates...

C - Chemistry, Metallurgy

08

K

400/111, 260/455

C08K 5/21 (2006.01) C07C 273/18 (2006.01) C07C 275/40 (2006.01) C08G 18/78 (2006.01) C08G 18/80 (2006.01) C07C 275/00 (2006.01) C07C 275/62 (2006.01)

Patent

CA 1148559

ABSTRACT OF THE DISCLOSURE The present invention relates to a process for the preparation of compounds selected from the group consisting of a polyisocyanate containing urea groups and a polyiso- cyanate containing biuret groups comprising (a) introducing an organic polyisocyanate into a reaction vessel, and (b) injecting an organic polyamine containing at least two primary amino groups into the organic polyisocyanate in the reaction vessel at a pressure of from about 2 to 1000 bar through a straight jet nozzle having an internal diameter of from about 0.01 to 5 mm wherein (i) the polyisocyanate/polyamine NCO/NH2 molar ratio is at least about 4:1 and (ii) the temperature in the reaction vessel is between about -20°C to 250°C.

319103

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