RADICALLY CURABLE UNDER ACTION OF UV-LED RADIATION INKS FOR OFFSET PRINTING AND PRINTING METHODS Russian patent published in 2025 - IPC C09D11/101 C09D11/03 B42D25/30 B41M1/06 

FIELD: chemistry.

SUBSTANCE: invention relates to the field of inks radically curable under the effect of UV-LED radiation for offset printing of protected documents. Disclosed is an offset printing ink radically curable under the effect of UV-LED radiation, containing from 50 wt.% to 80 wt.% of one or more radically curable (meth)acrylate compounds, from 8 wt.% to 12 wt.% of one or more photoinitiators, from 2 wt.% to 12 wt.% of one or more amine-containing compounds, from 1 wt.% to 30 wt.% of one or more inorganic pigments and/or one or more organic pigments, from 0.5 wt.% to 5 wt.% of one or more fillers and/or diluents and additives selected from co-initiators, anti-settling agents, antifoaming agents, surfactants and other process additives, wherein viscosity of which ranges from 2.5 to 25 Pa⋅s at 40 °C and 1000 s^-1; method of printing a feature on a substrate using an offset printing process using the disclosed ink; use of one or more photoinitiators to produce the disclosed paint; a security feature consisting of a cured layer of the disclosed paint, and a security document comprising the disclosed security feature.

EFFECT: obtaining inks for offset printing, which are characterized by good curing properties, while printing features obtained with their help have low fluorescence or no fluorescence.

21 cl, 1 dwg, 8 tbl, 12 ex