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US 6,387,583 B1Granted
Method of producing toner for developing latent electrostatic images by way of dispersion dyeing
AssigneeMatSci Solutions, Inc.
InventorHyun-Nam Yoon
Life of this patent
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Abstract
A process for preparing a dispersion dyed color toner for developing latent electrostatic images includes dyeing a particulate polymer resin in organic medium in which the resin is not soluble. The resin is a functionalized resin having sites suitable for interacting with functionalized dyes have corresponding functionality. The functionalized dye is applied to the resin particles typically with a dyeing aid, or surfactant. The particle size distribution of the polymer resin is substantially unchanged during the toner preparation process.
Claims15
A process of preparing a toner for developing latent electrostatic images comprising:
- a) dispersing a particulate polyester resin provided with functional sites suitable for interacting with a functionalized dye in a liquid organic medium, said polyester being substantially insoluble in said organic medium;
- b) providing said functionalized dye to said organic medium, said functionalized dye having functional sites adapted for interacting with the functional sites on said particulate polyester resin;
- c) maintaining the organic medium containing said particulate polyester resin and said dye at an elevated temperature for a time sufficient to dye said resin;
- and
- d) separating said organic medium and said particulate polyester resin;
- whereby said functionalized dye is applied to said resin particles and the particle size of said particulate polyester resin is substantially unchanged by the aforesaid process.
3 more elements
Dependencies are inferred from the claim text.