Invention Application
US20100075247A1 METHOD AND PREPARATION OF CHEMICALLY PREPARED TONERS 有权
化学制备碳粉的方法与制备

  • Patent Title: METHOD AND PREPARATION OF CHEMICALLY PREPARED TONERS
  • Patent Title (中): 化学制备碳粉的方法与制备
  • Application No.: US12237490
    Application Date: 2008-09-25
  • Publication No.: US20100075247A1
    Publication Date: 2010-03-25
  • Inventor: Xin JinCheng Yang
  • Applicant: Xin JinCheng Yang
  • Main IPC: G03G5/00
  • IPC: G03G5/00 C08G63/02
METHOD AND PREPARATION OF CHEMICALLY PREPARED TONERS
Abstract:
A method of making polymeric particles having a controlled size and size distribution, and in particular a method for the preparation of chemically prepared toners, via evaporative limited coalescence process, wherein basic silicate salts are employed to remove particulate stabilizer from precipitated polymer particles. The process includes the steps of dispersing polymeric binder materials and optional additives in an organic solvent to form an organic phase. The organic phase is dispersed by high shear agitation in an aqueous phase containing a particulate stabilizer, e.g. colloidal silica, to form a dispersion of small droplets of the organic phase in the aqueous phase. The dispersion is homogenized and the organic solvent is removed from the dispersed particles in the dispersion by evaporation, and polymeric particles are precipitated with particulate stabilizer on the surface thereof, which are then recovered, treated with a basic silicate salt to remove particulate stabilizer, and washed and dried.
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