Yellow radiation-curing ink, based on blend of acetoacetanilide-based monoazo and disazo dyes, for use in flexographic and lithographic printing

摘要

A radiation curing yellow ink suitable for flexographic and lithographic printing comprises:

• 5-25% (by weight based on total weight of ink) of a pigment of formula (I):
• 0.5-2.5% of a pigment of formula (II):
• 60-90% of an acrylic binder (optionally including reactive diluents and non-reactive resins); and
• 1-20% of a photoinitiator (optionally including a sensitizer); wherein:

  A1, A2 and A3

  are independently:

  R1

  is H or Cl; and

  M

  is Be, Mg, Ca, Sr or Ba.

  Also provided are (i) a precursor millbase comprising pigments (I) and (II) and acrylic binder (optionally with reactive diluents and non-reactive resins), (ii) a precursor blend comprising pigments (I) and (II), and (iii) a polychrome ink set comprising the yellow ink above in combination with cyan/blue, magenta/red and black inks.