abstract |
Process for the preparation of polyether polyols with equivalent molecular weights of 8,000 to 20,000 g / mol from one or more initiator compounds with H functionality, one or more alkylene oxides in the presence of a bimetallic cyanide catalyst (DMC), characterized in that the alkylene oxides are dosed to the reactor within 15 to 23 h and in which for the calculation of the equivalent molecular weight, it applies: equivalent molecular weight> = 56,100 / (OH index [mg of KOH / g]) |