| 摘要 |
PURPOSE:To obtain high-quality images by using fine powder of coke as a core material and forming a shell contg. a binder resin, specific polyamide resin and coloring agent around the core material. CONSTITUTION:The fine powder of coke is used as the core material and the shell contg. the binder resin, the coloring agent and the polyamide resin having the structural unit expressed by the formula I or the formula II is formed around the core material. In the formulas I, II, m denotes >=8 integer; n denotes >=2 integer; X denotes a residual aliphat. hydrocarbon group of >=8C; p denotes positive integer, respectively. The gold and silver color toners formed by using this polyamide resin as an offset preventive agent are capable of forming the images having the higher sharpness and brightness than the images formed by using an olefinic polymer as the offset preventive agent. |
