Process for preparing toner including a borax coupling agent
AssigneeLexmark International, Inc.
InventorsJing X. Sun, Kofi Opare Diggs
Life of this patent
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Abstract
A method for producing toner according to one example embodiment includes combining and agglomerating a first polymer emulsion with a colorant dispersion and a release agent dispersion to form toner cores. A borax coupling agent is added to the toner cores. A second polymer emulsion is combined and agglomerated with the toner cores having the borax coupling agent to form toner shells around the toner cores. The aggregated toner cores and toner shells are fused to form toner particles.
Claims20
A method for producing toner, comprising:
- combining and agglomerating a first polymer emulsion with a colorant dispersion and a release agent dispersion to form toner cores;
- adding a borax coupling agent to the toner cores;
- combining and agglomerating a second polymer emulsion with the toner cores having the borax coupling agent to form toner shells around the toner cores;
- and
- fusing the aggregated toner cores and toner shells to form toner particles.
A method for producing toner, comprising:
- combining a first polymer emulsion with a colorant dispersion and a release agent dispersion to form toner cores;
- adjusting the pH of the combination of the first polymer emulsion, the colorant dispersion and the release agent dispersion to promote agglomeration of the toner cores;
- once the toner cores reach a predetermined size, adding a borax coupling agent to the toner cores;
- combining a second polymer emulsion with the toner cores having the borax coupling agent and forming toner shells around the toner cores;
- once a desired toner particle size is reached, adjusting the pH of the mixture of aggregated toner cores and toner shells to prevent additional particle growth;
- and
- fusing the aggregated toner cores and toner shells to form toner particles.
The method of claim 16, wherein the first polymer emulsion includes a first polyester resin or mixture and the second polymer emulsion includes a second polyester resin or mixture different from the first polyester resin or mixture.
The method of claim 18, wherein the first polymer emulsion includes a first styrene polymer or mixture and the second polymer emulsion includes a second styrene polymer or mixture different from the first styrene polymer or mixture.
Dependencies are inferred from the claim text.