Patent ID: 7939583

Claim:
A liquid printing ink for flexographic and/or gravure printing, comprising a) at least two binders, b) a solvent or a mixture of different solvents, c) one or more colorants, and optionally further additives, wherein the at least two binders (a) constitute from 5 to 30% by weight of the printing ink, and at least one of the binders is a hyperbranched polymer which has a non-uniform molecular composition and structure and has functional groups, and at least one of the binders is a nitrocellulose, wherein the hyperbranched polymer is a hyperbranched polyurea polyurethane, a hyperbranched polyamine, and/or a hyperbranched polyesteramide, the solvent or the mixture of different solvents (b) constitutes from 50 to 80% by weight of the printing ink, and any solvent as well as any mixture of different solvents is selected from the group consisting of hydrocarbons, alcohols, substituted alcohols, esters and mixtures thereof, and the one or more colorants (c) constitute from 5 to 25% by weight of the printing ink, and the ink comprises no water.