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

07

C

C07C 263/04 (2006.01) C07C 265/14 (2006.01)

Patent

CA 2397683

Process for the preparation of organic polyisocyanates by decomposing the corresponding organic polycarbamates into organic polyisocyanates and alcohols, characterised in that the alcohol and at least part of either the diisocyanates or the monoisocyanatomonocarbamates, or both, formed upon decomposition of the said polycarbamates is being removed during the decomposition.

L'invention concerne un procédé de préparation de polyisocyanates organiques par décomposition des polycarbamates organiques correspondants en polyisocyanates organiques et en alcools, caractérisé en ce que l'alcool et au moins une partie, des diisocyanates ou des monoisocyanatomonocarbamates, ou des deux, formés lors de la décomposition des polycarbamates, est éliminée durant la décomposition.

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