公开(公告)号：US4264648A

公开(公告)日：1981-04-28

申请号：US722172

申请日：1976-09-10

申请人： Ronald F. Ziolo ,  Richard B. Lewis

发明人： Ronald F. Ziolo ,  Richard B. Lewis

IPC分类号： G03G9/10

CPC分类号： G03G9/10

摘要： Electrostatographic carrier materials having low bulk densities and high magnetic permeabilities are obtained by impregnating low density porous silicaceous particles with a magnetic or magnetically-attractable transition metal or metal oxide thereof. The low density magnetic composite carrier particles are prepared by the thermal decomposition of transition metal carbonyls in the presence of the silicaceous particles with a suitable suspending medium. Air and moisture are excluded from the reaction vessel and the contents are heated with agitation so that the carbonyl boils and the mixture is refluxed until the temperature rises to that of the suspending medium whereupon impregnation of the silicaceous particles with elemental metal and/or metal oxide is complete. The mixture is cooled, the beads washed, air-dried, and recovered. When mixed with toner particles the aforementioned carrier materials experience significantly reduced toner impaction levels.

摘要翻译： 通过用磁性或磁性吸引的过渡金属或其金属氧化物浸渍低密度多孔硅质颗粒，获得具有低堆积密度和高磁导率的电离载体材料。 低密度磁性复合载体颗粒通过过渡金属羰基化合物在具有合适悬浮介质的硅质颗粒存在下的热分解来制备。 将空气和水分从反应容器中排除，并将内容物搅拌加热，使得羰基沸腾并将混合物回流直到温度升至悬浮介质温度，然后用元素金属和/或金属氧化物浸渍硅质颗粒 做完了。 将混合物冷却，洗涤珠子，空气干燥并回收。 当与调色剂颗粒混合时，上述载体材料经历显着降低的调色剂碰撞水平。