Process for preparing polyether polyols and polyols prepared...

Details Process for preparing polyether polyols and polyols prepared... Process for preparing polyether polyols and polyols prepared...

C - Chemistry, Metallurgy

08

G

C08G 65/26 (2006.01) C08G 18/48 (2006.01) C08G 18/50 (2006.01)

Patent

CA 2309138

Polyether polyols suitable for use in preparing rigid polyurethane foam are prepared by a process utilizing imidazole catalysts. The imidazole catalysts do not lose reactivity at higher tempera tures and can be used at higher temperatures to prepare polyols thereby decreasing residence time and energy consumption in polyol production processes.

L'invention concerne des polyols de polyéther, conçus pour la préparation de mousse polyuréthanne rigide, au moyen d'un procédé mettant en oeuvre des catalyseurs imidazole. Ces catalyseurs ne perdent pas leur réactivité à des températures élevées et on peut les utiliser à ces températures élevées pour préparer des polyols, diminuant ainsi le temps de séjour et la consommation d'énergie dans les procédés de production de polyols.

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