Fast curing uv inkjet inks based on hyper-branched polyester acrylates

A UV curable ink, comprising:

• 1-20 wt % of at least one hyperbranched polyester acrylate having a functionality in a range from 6 to 30;
• 1-30 wt % of at least one reactive diluent selected from the group consisting of ethylene glycol divinyl ether, diethylene glycol divinyl ether, triethylene glycol divinyl ether, propylene glycol divinyl ether, n-butanediol divinyl ether, 1,4-cyclohexanedimethanol divinyl ether, 1,4-cyclohexanedimethanol divinyl ether and mixtures thereof;
• 1-20 wt % of at least one free-radical photoinitiator of the Norrish I type;
• 30-70 wt % of at least one multifunctional (meth)acrylate monomer;
• and
• 0 wt % to 30 wt % of at least one monofunctional (meth)acrylate monomer.