A process for polymerizing isocyanates

Details A process for polymerizing isocyanates A process for polymerizing isocyanates

C - Chemistry, Metallurgy

08

G

C08G 18/02 (2006.01) C08G 18/10 (2006.01)

Patent

CA 2212074

Isocyanates are polymerized in a simple manner by polymerizing aliphatic and/or aromatic isocyanates in the presence of metallocenes at temperatures from20 to 220°C, optionally subject to increased or reduced pressure and optionally in the presence of an inert organic solvent, the metallocene being used in an amount of 5 to 50,000 ppm relative to the amount of isocyanates used.

Des isocyanates aliphatiques et (ou) aromatiques sont polymérisés de façon simple en présence de métallocènes à des températures de 20 à 220 degrés C, sous une pression facultativement haussée ou réduite, et facultativement en présence d'un solvant organique inerte; le métallocène est présent à des concentrations de 5 à 50 000 ppm par rapport à la quantité d'isocyanates employée.

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