51.
    发明专利
    未知

    公开(公告)号:DE10210125A1

    公开(公告)日:2003-09-25

    申请号:DE10210125

    申请日:2002-03-08

    Applicant: BASF AG

    Abstract: The invention relates to a method for producing polyether alcohols with a functionality of more than 2, comprising the following steps: a) a polyester alcohol having a functionality of more than 2, preferably at least 3, is produced by reacting at least one multifunctional alcohol with at least one multifunctional carboxylic acid; b) said polyester alcohol is reacted with alkylene oxides by using at least one DMC catalyst.

    53.
    发明专利
    未知

    公开(公告)号:ES2186649T3

    公开(公告)日:2003-05-16

    申请号:ES00926868

    申请日:2000-04-11

    Applicant: BASF AG

    Abstract: In a process for producing polyurethanes by reacting at least one polyisocyanate with at least one compound containing at least two hydrogen atoms which are reactive toward isocyanate groups, the compound having at least two active hydrogen atoms which is used is at least one polyether alcohol prepared by addition of alkylene oxides onto H-functional initiator substances by means of multimetal cyanide catalysis and the reaction is carried out in the presence of at least one metal salt.

    METHOD FOR PRODUCING MULTIMETAL CYANIDE COMPOUNDS

    公开(公告)号:HU0300001A2

    公开(公告)日:2003-04-28

    申请号:HU0300001

    申请日:2001-02-20

    Applicant: BASF AG

    Abstract: A process for preparing polyether polyols includes a precipitation step, a recrystallization step, and a reaction step. In the precipitation step, a multimetal cyanide compound is precipitated by reaction of a metal salt with a cyanometalate compound. In the recrystallization step, the multimetal cyanide compound precipitated above is recrystallized by adding further metal salt and/or further cyanometalate compound. The recrystallization forms a multimetal cyanide catalyst compound. In the reaction step, an initiator and one or more alkylene oxide are reacted in the presence of the multimetal cyanide catalyst compound.

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