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    VERFAHREN ZUR HERSTELLUNG VON POLYURETHAN- UND POLYISOCYANURAT-HARTSCHAUMSTOFFEN
    2.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON POLYURETHAN- UND POLYISOCYANURAT-HARTSCHAUMSTOFFEN 有权
    用于生产聚氨酯和异氰酸酯泡沫

    公开(公告)号：EP1874839A1

    公开(公告)日：2008-01-09

    申请号：EP06725697.4

    申请日：2006-04-11

    申请人： BASF AKTIENGESELLSCHAFT

    发明人： MALOTKI, Peter ,  LEHMANN, Pit ,  HENSIEK, Rainer ,  SCHÖN, Lars

    IPC分类号： C08G18/10 ,  C08G18/42 ,  C08J9/00

    CPC分类号： C08G18/4288 ,  C08G18/10 ,  C08G18/664

    摘要： The invention relates to a method for producing polyurethane or polyisocyanurate rigid foam by reacting polyisocyanates a) with compounds comprising at least two hydrogen atoms reactive with isocyanate groups b) in the absence of foaming agents. Said method is characterised in that c) the polyisocyanates used are a) prepolymers containing isocyanate groups and having an NCO content of between 25 and 31 wt. % in relation to the weight of the prepolymer, said prepolymers being produced by reacting ai) mixtures of monomer and polymer diphenylmethane diisocyanate with at least one compound comprising more than one hydrogen atom aii) reactive with isocyanate groups, and the compounds comprising at least two hydrogen atoms reactive with isocyanate groups b) contain at least one polyester alcohol bi) containing at least one hydrophobic initial constituent.