Patent ID: 9006499
Filing Date: 2015-04-14
Classification: C08G

Abstract:
1. Process for preparing polyether polyols having n En blocks each comprising at least 75% by weight of oxyethylene units, and m Am blocks being different from the En blocks, where n and m are each natural numbers from 1 to 10 and at least one starter compound having at least one Zerevitinov-active hydrogen atom and a melting point of ≧40° C., comprising reacting the at least one starter compound with ethylene oxide and at least one further alkylene oxide compound in the presence of a catalyst, wherein the En block(s) are metered in under the conditions of the following inequation; where x(cat) is defined as the amount of catalyst used in mol, t x n is as defined above, and wherein the total content of oxyethylene units in the polyether polyols, based on the total mass of all the alkylene oxides metered in, is from 5 to 85% by weight.