2.
    发明专利
    未知

    公开(公告)号:DE10351530A1

    公开(公告)日:2005-06-16

    申请号:DE10351530

    申请日:2003-11-03

    Applicant: BASF AG

    Abstract: The invention relates to a process for preparing prepolymers containing isocyanate groups by reacting a) diisocyanates with b) compounds having at least two hydrogen atoms which are reactive toward isocyanate groups in the presence of c) catalysts, and subsequently separating off the excess monomeric diisocyanates, wherein the diisocyanates a) used are unsymmetrical diisocyanates and the catalysts c) used are organometallic catalysts and these organometallic catalysts are removed, blocked or deactivated before the monomeric diisocyanates are separated off.

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