SOLVENT-FREE BIO-BASED EMULSION Russian patent published in 2015 - IPC G03G9/08 G03G5/00 C08J3/02 C08G63/00 C08L67/02 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing toner particles based on bio-based amorphous polyester resin. The method includes bringing at least one bio-based amorphous polyester resin into contact with an optional crystalline polymer and an optional plasticiser in an extruder to obtain a polymer mixture; neutralising the polymer mixture in the extruder with a neutralising agent; bringing the polymer mixture in the extruder into contact with a surfactant; stirring the molten polymer mixture in the extruder; bringing the molten mixture into contact with deionised water in the extruder to obtain an oil-in-water emulsion containing latex; extracting the latex from the extruder; adding an optional crystalline polymer, an optional dye and optional paraffin to the latex to form a second mixture; aggregating the mixture to form particles; adjusting the pH of the mixture within the range of about 3 to about 10 to stop growth of particles; coalescing the particles at pH of about 5 to about 8 to obtain toner particles; extracting the toner particles.

EFFECT: high efficiency of the method.

11 cl, 5 dwg, 4 ex