FLUORESCENTING RED COLOUR UNDER ACTION OF ULTRAVIOLET RADIATION OF EA-TONER Russian patent published in 2017 - IPC G03G9/08 C09D11/00 G03G9/97 C09K11/06 

FIELD: chemistry.

SUBSTANCE: invention discloses a toner that fluoresces red under UV radiation, comprising a pigment comprising a lanthanide complex in an amount of at least about 3 wt %, at least one amorphous resin, optionally a crystalline gum, an aggregating agent, a stabiliser that does not forms metal ion complexes where the stabiliser contains a gluconic acid salt selected from sodium gluconate or potassium gluconate, optionally a surfactant and optionally a wax, the toner having a wavelength λ_Max of absorption from about 330 to 380 nm and wavelength λ_Max of radiation from about 612 to 618 nm. Also, a transparent toner is disclosed, fluorescenting with red colour under UV radiation action, comprising a pigment containing a complex of europium (III) in an amount of at least about 3 wt % of at least one amorphous resin, optionally a crystalline resin, an aggregating agent, a stabiliser, which does not form complexes of metal ions, wherein the stabiliser comprises a salt of gluconic acid, selected from sodium gluconate or potassium gluconate, optionally surfactant and optionally a wax, wherein the toner them a wavelength λ_Max absorption from about 330 to 380 nm and wavelength λ_Max radiation from about 612 to 618 nm.

EFFECT: obtaining toners that are transparent under visible light, but at the same time provide a clearly visible red image under the influence of the corresponding incident light.

15 cl, 10 ex, 2 tbl