Patent ID: 6482993
Filing Date: 2002-11-19
Classification: B01J,C08G

Abstract:
A method for producing long-chain polyether polyols without reprocessing, comprising:(i) obtaining at least one oligomeric, alkoxylated starter compound by reacting: (a) at least one starter compound having a number average molecular weight of from about 18 to about 400 and further comprising from 1 to 8 hydroxyl groups with; (b) at least one alkylene oxide in the presence of; (c) from about 5 to about 200 ppm, relative to the amount of oligomeric, alkoxylated starter compound to be produced, a catalyst comprising a perfluoroalkylsulfonate of a metal of group III A of the Periodic System of Elements (IUPAC convention of 1970); (d) at a reaction temperature of from about 80Â° C. to about 200Â° C.; (ii) converting the oligomeric, alkoxylated starter compound into a long-chain polyether polyol without removal of the catalyst by reacting: (a) the oligomeric, alkoxylated starter compound with; (b) at least one alkylene oxide in the presence of; (c) at least one DMC catalyst, wherein the concentration of DMC catalyst is from about 30 ppm or less relative to the amount of long-chain polyether polyol to be produced.