Synthesis of Toner Particles by Microsuspension Polymerization

Abstract

Toner particles were synthesized by suspension polymerization technique. Styrene and butyl methacrylate were used as monomer with the ratio of 7 to 3, and fillers, such as carbon black, charge control agent (CCA) and wax were incorporated. AIBN was used as initiator and tricalcium phosphate slurry, as stabilizer. Most reactions were carried out at 70 to 80°C, and reaction generally took 6 to 9 hours, depending on reaction condition. Adding filler particles significantly decreased the reaction rate, thus conversion. This phenomenon became more manifested for CCA and wax particles. The glass transition temperature, determined by DSC, was found to be around 60°C regardless of the amount of filler particles. Particle size varied from 4 to 15 um in diameter, depending on polymerization condition. Charge to mass ratio was determined to be -15 μC/g. Imaging test has been conducted, which exhibited a fine image.