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AssigneeCovestro Deutschland AG
InventorsFrank Richter, Martin Anstock, Philip Bahke, Andreas Gosch, Reinhard Halpaap, Andreas Hecking, Sigurd Buchholz, Ursula Tracht, Adrian Cosmin Dobre
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A process for continuous preparation of oligomeric or polymeric isocyanates by catalytic modification of monomeric di- and/or triisocyanates, characterized in that at least one isocyanate component A and at least one catalyst component B are combined continuously in a reaction apparatus and conducted through the reaction apparatus as a reaction mixture, the residence time distribution being characterized according to the dispersion model by Bo (Bodenstein number) above 40, preferably above 60 and most preferably above 80.
A process for the continuous preparation of oligomeric or polymeric isocyanates by catalytic modification of monomeric diisocyanates and/or triisocyanates, comprising continuously combining at least one isocyanate component A and at least one catalyst component B in a reaction apparatus and conveying as reaction mixture through the reaction apparatus, wherein a residence time distribution according to the dispersion model has a Bo (Bodenstein number) above 40 and wherein the residence section has a maximum pressure drop of from 0 to 30 bar and has a heat transfer rate above 10 kW/(K m3).
Dependencies are inferred from the claim text.