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LOW MELT TONERS AND PROCESSES THEREOF

  • US 20100021841A1
  • Filed: 10/06/2009
  • Published: 01/28/2010
  • Est. Priority Date: 09/23/2004
  • Status: Active Grant
First Claim
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1. A method for forming low melt polyester based toner, the method comprising:

  • forming an emulsion resin comprising a branched amorphous polyester resin component and a crystalline polyester resin component;

    forming a pre-toner mixture by adding a colorant and optionally a wax to the emulsion resin;

    homogenizing the pre-toner mixture;

    aggregating the pre-toner mixture by adding an aggregating agent, thereby forming an aggregate mixture comprising a plurality of aggregate toner particles;

    adjusting the pH of the aggregate mixture to between about 5 and about 7;

    coalescing the aggregate mixture by heating the aggregate mixture to a temperature from about 5 to about 20°

    C. above the glass transition temperature of the branched amorphous polyester resin component, thereby generating a mixture of coalesced toner particles; and

    cooling the toner particles to room temperature.

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