| 摘要 |
PURPOSE:To obtain a toner contg. a pigment and magnetic particles uniformly dispersed in the inside and having excellent developability and fixability by mixing a pigment treated with acid halide with a polymerizable memomer and polymerizing the monomer through aq. suspension polymn. to form toner particles. CONSTITUTION:A pigment or magnetic powder, such as TiO12, SiO2, Fe, Co, Ni, Fe2O3, or carbon black, is dispersed into a benzene soln. of an acid halide having >5C, treated, when needed, in the presence of a tertiary amine, such as pyridine or quinoline, at room temp. for several min, filtered, and dried to remove the solvent. These treated pigment and the magnetic powder are mixed with a monomer, and when needed, an electrostatic charge stabilizer, etc. are added, and suspension polymn. is carried out in an aq. medium dissolving a dispersion stabilizer, or a mixture of the monomer and said aic halide, and when needed, a necessary amt. of tertiary amine may be suspension-polymerized. As a result, the toner thus obtained contains the pigment and the magnetic powder uniformly in the inside of the toner particles, and it has excellent electric and magnetic characteristics. |
