公开(公告)号：US06653441B2

公开(公告)日：2003-11-25

申请号：US10130846

申请日：2002-05-21

申请人： Kathrin Harre ,  Gerd Höppner ,  Georg Heinrich Grosch ,  Stephan Bauer ,  Jürgen Winkler ,  Els Paredis ,  Reinhard Lorenz ,  Inge Rotermund

发明人： Kathrin Harre ,  Gerd Höppner ,  Georg Heinrich Grosch ,  Stephan Bauer ,  Jürgen Winkler ,  Els Paredis ,  Reinhard Lorenz ,  Inge Rotermund

IPC分类号： C07C4311

CPC分类号： C08G65/2663 ,  C08G18/485 ,  C08G65/2696

摘要： In a process for preparing polyether alcohols by catalytic addition of at least two alkylene oxides onto H-functional initiator substances, at least one multimetal cyanide compound is used as catalyst and the addition of the alkylene oxides onto the initiator substance includes incorporation of at least one oxyalkylene block during whose formation at least two alkylene oxides are metered in together and the ratio of the alkylene oxides to one another in the mixture is changed during the joint introduction.