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    METHOD FOR PRODUCING POLYETHER POLYOLS IN THE PRESENCE OF A MULTI-METAL CYANIDE COMPLEX CATALYST
    11.
    发明专利
    METHOD FOR PRODUCING POLYETHER POLYOLS IN THE PRESENCE OF A MULTI-METAL CYANIDE COMPLEX CATALYST 未知

    公开(公告)号：PL357642A1

    公开(公告)日：2004-07-26

    申请号：PL35764201

    申请日：2001-02-22

    Applicant: BASF AG

    Inventor： OSTROWSKI THOMAS ,  HARRE KATHRIN ,  ZEHNER PETER ,  MULLER JORN ,  STUTZER DIETER ,  GROSCH GEORG HEINRICH ,  WINKLER JURGEN ,  BAUER STEPHAN

    IPC: B01J27/26 ,  C08G65/26 ,  C08G65/28

    Abstract: Production of polyether polyols comprises use of a multi-metal cyanide complex catalyst in a tall cylindrical reactor having a downward facing spray nozzle in the upper reactor portion, through which the educts and reaction mixture are fed and an outlet, preferably in the lower portion of the reactor to recirculate the reaction mixture via an external circuit and equalizing reservoir. A process for the production of polyether polyols (I) by reaction of diols or polyols with ethylene oxide, propylene oxide and/or butylene oxide in the presence of a multi-metal cyanide complex catalyst (II) comprises carrying out the reaction in a tall cylindrical reactor having a downward facing spray nozzle in the upper reactor portion, through which the educts and reaction mixture are fed, and an outlet, preferably in the lower portion of the reactor, through which the reaction mixture is fed by means of a pump through an external circuit via an equalizing reservoir to the spray nozzle. The external circuit comprises a concentric pipe stretching the entire length of the reactor excluding the reactor ends and contains a heat exchanger integrated within the annulus.

    PREPARATION OF HIGHLY FUNCTIONAL AROMATIC POLYISOCYANATES
    16.
    发明专利
    PREPARATION OF HIGHLY FUNCTIONAL AROMATIC POLYISOCYANATES 未知

    公开(公告)号：CA2366154A1

    公开(公告)日：2002-06-22

    申请号：CA2366154

    申请日：2001-12-21

    Applicant: BASF AG

    Inventor： WINKLER JURGEN ,  MURRAR IMBRIDT ,  SCHUSTER MARITA ,  PLAUMANN HEINZ

    IPC: C07C273/18 ,  C08G18/16 ,  C08G18/40 ,  C08G18/78 ,  C08G18/76 ,  C08G18/06

    Abstract: Highly functional aromatic polyisocyanates are prepared by reacting aromatic polyisocyanates, if required as a mixture with further mono- and/or polyisocyanates, with addition of catalytic acidic substances and water, by a process wherein the aromatic polyisocyanates used comprise at least one tolylene diisocyanate and the catalytic acidic substance used is at least one alkyl and/or aralkyl phosphate, and the process is carried out in such a way that the water is added with a temperature/time gradient increase from 5 to 60.degree./hour and until an isocyanate modification of the starting NCO terminal groups from 1 to 80% is established. The highly functional aromatic polyisocyanates prepared by this process are used for the preparation of polyurethane foams, in particular flexible polyurethane foams.

    PREPARATION OF POLYETHEROLS
    17.
    发明专利
    PREPARATION OF POLYETHEROLS 未知

    公开(公告)号：CA2354240A1

    公开(公告)日：2002-01-28

    申请号：CA2354240

    申请日：2001-07-27

    Applicant: BASF AG

    Inventor： HOPPNER GERD ,  KNORR GOTTFRIED ,  REICHELT MICHAEL ,  DINSCH STEFAN ,  WINKLER JURGEN ,  MALOTKI PETER VON

    IPC: C08G65/26 ,  C08G18/48

    Abstract: Polyetherols based on solid initiator substances and liquid, hydroxyl-containing coinitiators are prepared by a catalyzed addition reaction of alkylene oxides by a process in which the initiator combination contains ethoxy structures, the ratio of the average number of hydroxyl groups per mole of initiator combination to the number of ethoxy structures in the polyetherol being from 1:0.2 to 1:1.8 and the ratio of the amounts by weight of the ethoxy structures to the average molecular weight of_the polyetherol being from 1:2 to 1:15. The polyetherols prepared by this process are used for the preparation of PUR, in particular rigid PUR foams.

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