13.
    发明专利
    未知

    公开(公告)号:MX144008A

    公开(公告)日:1981-08-18

    申请号:MX16792877

    申请日:1977-02-03

    Applicant: BASF AG

    Abstract: Storage-stable, liquid, only slightly colored polyisocyanates possessing carbodiimide groups and having an isocyanate content of from about 25 to 35% by weight, based on total weight; these products are obtained by condensing polyisocyanates in the presence of phospholines, phospholidines and/or their oxides, and stopping the condensation and stabilizing the condensation products with the Lewis acids, aromatic carboxylic acid halides, aromatic sulfonic acid esters and/or alkyl sulfates.

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