Long-chain polyether polyols with a high proportion of...

Details Long-chain polyether polyols with a high proportion of... Long-chain polyether polyols with a high proportion of...

C - Chemistry, Metallurgy

08

G

C08G 65/28 (2006.01) C08G 18/48 (2006.01)

Patent

CA 2367670

The invention relates to long-chain polyether polyols having a content of primary OH groups of 40 to 95 mol-% and a total content of oxyethylene units of >25 wt.% as well as a process for their production by DMC-catalysed polyaddition of an ethylene oxide (EO)/propylene oxide (PO) mixture in the weight ratio of 40:60 to 95:5 as an end block to starter compounds having active hydrogen atoms.

L'invention concerne des polyétherpolyols à chaîne longue, présentant une proportion de groupes OH primaires de 40 à 95 % en moles et une teneur totale en unité oxyéthylène > 25 % en poids. L'invention concerne également un procédé de production de ces polyétherpolyols par polyaddition, catalysée par cyanure bimétallique, d'un mélange oxyde d'éthylène (EO)/oxyde de propylène (PO), dont le rapport pondéral est de 40:60 à 95:5, comme bloc terminal, à des composés initiateurs comportant des atomes d'hydrogène actifs.

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