Patent ID: 8940804
Filing Date: 2015-01-27
Classification: C09D

Abstract:
1. An acrylate-based UV-curable ink having a content of pigment(s), radical photoinitiators, dispersing agent(s) and optionally further additives, characterised in that it contains at least two radical photoinitiators (A) and (B) of the Norrish Type I and at least one radically curable monomer in the form of a polyfunctional alkoxylated and/or polyalkoxylated acrylate monomer, which comprises one or more diacrylates and/or triacrylates, wherein the mol ratio of all the acrylates to all the initiators is from 7:1 to 15:1 , and the ink has a viscosity (measured using the Bohlin apparatus at 45 ° C.) of 5 to 15 mPa.s, and wherein at least one of the radical photoinitiators of the Norrish Type I is a bifunctional initiator comprising two potential cleaving sites or the at least one radically curable monomer comprises more than one di- and/or tri-acrylates.