Patent ID: 6093793
Filing Date: 2000-07-25
Classification: C08G

Abstract:
A process for the production of a polyether polyol comprising reactinga) at least one compound having active hydrogen atoms which is derived from a starter compound having from 1 to 8 hydroxyl, thiol or amino groups withb) at least one alkylene oxide in the presence ofc) a catalyst which is a perfluorosulfonic acid salt of a metal selected from the group consisting of scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, actinium, thorium, protactinium, uranium, neptunium, plutonium, americum, curium, berkelium, californium, einsteinium, fermium, mendelevium, nobelium, lawrencium and didymium in which the metal is bonded to at least one perfluoroalkylsulfonate groupat a temperature of from about 40 to about 200.degree. C. in the absence of an accelerator selected from the group consisting of carboxylic anhydrides, acyl halides, carboxylic acids having a pK.sub.a in water of less than about 6, silicon compounds in which one or more silicon atoms is bound to a group whose conjugate acid has a pK.sub.a of 16 or less in water, vinyl ester accelerators and phosphorous compounds which act as accelerators.