| 摘要 |
PURPOSE:To prevent an offset temp. from increasing, to prevent the flowability of a toner from lowering and to present a stably positive electrostatical chargeability by incorporating an polyolefine resin modified with an organic silane compound having an amino group. CONSTITUTION:This releasing agent incorporates the polyolefine resin modified with the organic silane compound having the amino group. A weight average molecular weight of the polyolefine resin is normally 2000 - 1,000,000 and when the weight average molecular weight is over one million, it is disadvantageous to maintain the proper dispersibility into the resin. The melting viscosity of the releasing agent at 160 deg.C is less than 1000 cps and what the melting viscosity at 160 deg.C is over 1000 cps is insufficient at the offset temp., when it is used as an electrophotographic toner. Thus it shows an uniformly positive electrified tendency and in spite of that the polyolefine releasing agent is introduced a polar group having an electrostatical charge control function, in it the flowability of the toner is not deteriorated and the offset resistance is improved. |
