72.
    发明专利
    未知

    公开(公告)号:DE19942616A1

    公开(公告)日:2001-03-15

    申请号:DE19942616

    申请日:1999-09-08

    Applicant: BASF AG

    Abstract: The invention relates to a method for producing skins from polyurethane dispersions, comprising the following steps: 1) two-dimensionally coating the surface of a substrate or the surface of a film covering the substrate by simultaneously spraying an aqueous dispersion containing a polyurethane (polyurethane A) with ionic groups and an ionic or potentially ionic precipitating agent (precipitating agent F) in liquid form onto the surface of the substrate or the surface of the film covering the substrate, so that a covering is formed; and 2) removing the covering, or if the surface of the substrate was covered by a film, the composite structure consisting of the covering and the film, from the substrate.

    80.
    发明专利
    未知

    公开(公告)号:DE102005006984A1

    公开(公告)日:2006-08-17

    申请号:DE102005006984

    申请日:2005-02-15

    Applicant: BASF AG

    Abstract: An aqueous dispersion comprising a polyurethane synthesized from a) organic diisocyanates b) dihydroxy compounds having a molar weight of 500 to 5000 g/mol and comprising no ionic group or group that can be converted to an ionic group c) mono- to trihydric alcohols additionally comprising an ionic group d) if appropriate, further compounds other than a) to c), wherein the polyurethane comprises less than 0.6% by weight of urea groups (calculated with a molar weight of 56 g/mol), the ionic group of c) has been at least partly neutralized with an alkali metal cation, and the reaction of compounds a), b), c), and d) does not take place in the presence of a catalyst containing a metal-carbon bond.

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