Patent ID: 8524795
Filing Date: 2013-09-03
Classification: C09D

Abstract:
1. A radiation curable ink having a viscosity of 30 mPa·s or less at 50° C., the ink comprising at least two monofunctional monomers, the at least two monofunctional monomers comprising a first monomer selected from an N-vinyl amide and a second monofunctional monomer being isobornyl acrylate, a difunctional acrylate monomer being propoxylated or ethoxylated neopentyl glycol di acrylate, at least one multifunctional monomer selected from the group consisting of a trifunctional acrylate monomer, a tetrafunctional acrylate monomer, a pentafunctional acrylate monomer, a trifunctional epoxide monomer, a tetrafunctional epoxide monomer, a pentafunctional epoxide monomer, a trifunctional oxetane monomer, a tetrafunctional oxetane monomer, a pentafunctional oxetane monomer, a trifunctional vinylether monomer, a tetrafunctional vinylether monomer and a pentafunctional vinylether monomer, the ink further comprising at least one photoinitiator and a colorant; wherein the amount of multifunctional acrylate monomer is from 1 wt % to about 5 wt % based on the total weight of the ink.