Process for the preparation of a polyiscocyanate with a...

Details Process for the preparation of a polyiscocyanate with a... Process for the preparation of a polyiscocyanate with a...

C - Chemistry, Metallurgy

07

C

402/217

C07C 275/62 (2006.01) C07C 273/18 (2006.01) C08G 18/78 (2006.01)

Patent

CA 1276745

PROCEDE DE PREPARATION DE POLYISOCYANATE A GROUPEMENT BIURET ABREGE DU CONTENU TECHNIQUE DE L'INVENTION La présente invention concerne un procédé de préparation de polyisocyanate à groupement biuret et, plus particulièrement, à partir d'un diisocyanate aliphatique, cycloaliphatique ou arylaliphatique et d'eau. Plus précisément dans ce procédé, la réaction du diisocyanate monomère et de l'eau est conduite sous pression de gaz carbonique. On obtient ainsi un polyisocyanate à groupement biuret pratiquement sans précipité de polyurée et stable à la conservation.

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