Patent ID: 6387583
Filing Date: 2002-05-14
Classification: G03G

Abstract:
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.