53.
    发明专利
    未知

    公开(公告)号:DE50011922D1

    公开(公告)日:2006-01-26

    申请号:DE50011922

    申请日:2000-08-24

    Applicant: BASF AG

    Abstract: A process for producing scratch-resistant coatings comprises applying at least one UV-curable coating composition comprising as its photochemically crosslinkable constituentat least one aliphatic urethane (meth)acrylate prepolymer PU having at least two double bonds per molecule, ora mixture of at least one urethane (meth)acrylate prepolymer PU and at least one reactive diluent,to the target substrate and curing the resulting wet coating by exposure to ultraviolet radiation under an inert gas atmosphere.

    55.
    发明专利
    未知

    公开(公告)号:AT286517T

    公开(公告)日:2005-01-15

    申请号:AT01101085

    申请日:2001-01-18

    Applicant: BASF AG

    Abstract: A water dispersible, radiation curable polyurethane comprises organic aliphatic or alicyclic polyisocyanates, cycloaliphatic diols and/or cycloaliphatic diamines, compounds having at least one isocyanate reactive group and at least one radically polymerizable unsaturated group and compounds having at least one isocyanate reactive group and at least one dispersion aiding group. A water dispersible, radiation curable polyurethane (I) comprises: (A) organic aliphatic or alicyclic polyisocyanates; (B) cycloaliphatic diols and/or cycloaliphatic diamines; (C) compounds having at least one isocyanate reactive group and at least one radically polymerizable unsaturated group; (D) compounds having at least one isocyanate reactive group and at least one dispersion aiding group; (E) optionally compounds having at least two isocyanate reactive groups having a mol. wt. of less than 1000 g/mol; (F) optionally compounds having at least one isocyanate reactive group that are different to (A)-(D). Independent claims are included for: (i) a polyurethane dispersion (II) comprising the polyurethane (I) and optionally 0-10 wt.% of a photochemical and/or thermal initiator and 0-10 wt.% of a UV absorber and a HALS compound; (ii) a process for the coating of substrates by application of the polyurethane dispersion (II), optionally containing conventional paint additives, onto a substrate and curing by means of electron irradiation or UV light under oxygen, or preferably under inert gas; (iii) the resulting coated substrate.

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