High resolution polyester developers for electrostatography
AssigneeEastman Kodak Company
InventorsJohn C. Wilson, Domenic Santilli, Lawrence P. DeMejo
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Abstract
Dry or liquid developers capable of forming high resolution electrostatographic images are made from finely divided toner particles comprising a fusible branched chain, polyester resin which contains 2,3-dihydro,1,3-dioxo-2-yl-1H-isoindole-ar(-yl or -diyl) groups derived, for example, from a 2,3-dihydro-1,3-dioxo-1H-isoindole-5-carboxylic acid. The toner compositions are brittle and can be ground to very small particle size for high resolution image development; they have good cohesivity and resist toner offset; they are fusible at low temperatures; and, in preferred embodiments, are capable of forming transparent color images.
Claims16
An electrostatographic toner composition comprising an amorphous fusible polyester resin, said resin being a branched chain polyester containing 2,3-dihydro-1,3-dioxo-2-yl-1H isoindole-ar(-yl or -diyl) groups in sufficient concentration to make the polyester resin grindable to fine particle size.
Dependencies are inferred from the claim text.