Method of producing toner for developing latent electrostatic images by way of dispersion dyeing
OwnerHyun-Nam Yooninventor
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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.
Claims37
A process of preparing a toner for developing latent electrostatic images comprising:
- a) dispersing a particulate polymer resin provided with functional sites suitable for interacting with a functionalized dye in a liquid organic medium, said polymer 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 polymer resin;
- c) maintaining the organic medium containing said particulate polymer 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 polymer resin;
- whereby said functionalized dye is applied to said resin particles and the particle size of said particulate polymer resin is substantially unchanged by the aforesaid process.
A dispersion dyed color toner for developing latent electrostatic images prepared by way of a process comprising:
- a) dispersing a particulate polymer resin provided with functional sites suitable for interacting with a functionalized dye in a liquid organic medium, said polymer 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 site on said particulate polymer resins;
- c) maintaining the organic medium containing said particulate polymer 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 polymer resin;
- whereby said functionalized dye is applied to said resin particles and the particle size of said particulate polymer resin is substantially unchanged by the aforesaid process.
Dependencies are inferred from the claim text.