USE OF AQUEOUS POLYURETHANE DISPERSIONS IN PRINTING INKS AND CORRESPONDING PRINTING PROCESS

The present invention provides the use of aqueous dispersions comprising a pigment (B) at least partially enveloped by polyurethane (A) and further comprising at least one polymerization inhibitor (C), said polyurethane (A) being obtainable by reaction of (a) 15% to 70% by weight of di- or polyisocy...

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Bibliographische Detailangaben
Hauptverfasser: SCHWALM, REINHOLD, TUERK, HOLGER, BEK, MARTIN KAARUP, DU FRESNE VON HOHENESCHE, CEDRIC
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:The present invention provides the use of aqueous dispersions comprising a pigment (B) at least partially enveloped by polyurethane (A) and further comprising at least one polymerization inhibitor (C), said polyurethane (A) being obtainable by reaction of (a) 15% to 70% by weight of di- or polyisocyanate comprising on average from 1 to 10 allophanate groups and on average from 1 to 10 C-C double bonds per molecule, and optionally (b) 0% to 60% by weight of further di- or polyisocyanate, with (c) 5% to 50% by weight of compound having at least two isocyanate-reactive groups, weight % ages being based on total polyurethane (A), in printing inks.