| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the occurrence of offset and filming at the time of copying and to improve the heat resistance and low temperature fixability and charge stability of a toner by incorporating natural wax and/or Sasol wax having a melting point lower than a specified temperature. SOLUTION: This electrostatic charge image developing toner comprises a resin composition obtained by incorporating natural wax and/or Sasol wax having a melting point of 50 deg.C-120 deg.C, preferably, 70 deg.C-100 deg.C at the time of synthesizing a binder resin, at least polypropylene wax and a colorant. When a styrene copolymer is used for the binder resin, an acid value for holding charge stability is controlled properly to 1-30, preferably, 1-20, more preferably, 3-10 mg KOH/g, by reguating the amount of an unsaturated carboxylic acid such as (meth)- acrylate to be incorporated into the resin composition.</p> |
