COMPOSITION OF TONERS FOR FIXATION BY COLD PRESSURE ON BASIS OF MIXTURES OF LOW-MOLECULAR CRYSTALLINE AND AMORPHOUS ORGANIC COMPOUNDS Russian patent published in 2019 - IPC G03G9/08 G03G9/87 G03G9/83 

FIELD: chemistry.

SUBSTANCE: invention relates to toner compositions for use in xerography. Disclosed is a composition of toner for cold pressure fixation, comprising a material based on a crystalline organic compound containing: crystalline polyester or low-molecular weight ester, in form of distearyl terephthalate (DST), phenyl ester or benzyl ester; wherein the material based on the crystalline organic compound has a melting point in the range of about 30 °C to about 130 °C; and an amorphous organic compound based material comprising: a) colophony ester; b) terpene copolymerised with styrene, polyterpene or terpene-containing phenol polymers; or c) hydrogenated hydrocarbon resins obtained from aliphatic monomers containing 5 carbon atoms, or aromatic monomers containing 9 carbon atoms, wherein the amorphous organic compound-based material has T_g from approximately -30 °C to about 70 °C; number average molecular weight M_n material based on amorphous organic compound ranges from about 300 to about 1200, and weight average molecular weight M_w ranges from about 300 to about 2000; and wherein temperature required to reduce toner viscosity for cold pressure fixation of up to 10⁴ Pa⋅s at pressure of 100 kgf/cm², ranges from about 15 °C to about 70 °C, wherein temperature required to reduce toner viscosity for cold pressure fixation of up to 10⁴ Pa⋅s at pressure of 10 kgf/cm², ranges from about 50 °C to about 90 °C, and wherein temperature change required to reduce toner viscosity for cold pressure fixation of up to 10⁴ Pa⋅s at pressure change from 10 to 100 kg/cm² ranges from about 10 °C to about 60 °C.

EFFECT: technical result is disclosed composition has application of pressure required fluidity at temperature close to room temperature.

6 cl, 4 dwg, 7 tbl, 3 ex