Toner making process
First Claim
Patent Images
1. A process for making a latex emulsion comprising:
- mixing at least one resin with an organic solvent to form a resin composition;
generating neutralization agent vapors;
combining the neutralization agent vapors with steam; and
exposing the resin composition to the combination of the neutralization agent vapors and steam to initiate emulsification of the resin composition to form a latex emulsion.
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Abstract
Processes for making toners, and in particular, emulsion aggregation (EA) toners. These toners exhibit a low melt temperature while simultaneously exhibiting excellent relative humidity sensitivity regarding charging properties. In embodiments, the process comprises the preparation of the latex emulsion comprising high ratio resin compositions by injection of steam and neutralization agent vapors into the latex emulsion.
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Citations
20 Claims
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1. A process for making a latex emulsion comprising:
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mixing at least one resin with an organic solvent to form a resin composition; generating neutralization agent vapors; combining the neutralization agent vapors with steam; and exposing the resin composition to the combination of the neutralization agent vapors and steam to initiate emulsification of the resin composition to form a latex emulsion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A process for making a toner comprising:
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mixing at least one polyester resin with a solvent to form a resin composition; generating neutralization agent vapors; combining the neutralization agent vapors with steam; exposing the resin composition to the combination of the neutralization agent vapors and steam to initiate emulsification of the resin composition to form a latex emulsion; forming a pre-toner mixture by mixing the latex emulsion with an optional colorant, and an optional wax; aggregating particles from the pre-toner mixture; and coalescing the aggregated particles to form toner particles. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. An apparatus for preparing a latex or emulsion, comprising:
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a reaction vessel for initiating emulsification, a steam generator connected to the reaction vessel for providing steam to the reaction vessel; and a source of neutralization agent liquid connected to the reaction vessel for providing neutralization agent vapors to the reaction vessel.
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Specification