Carbon based black toners prepared via limited coalescence process
AssigneeEastman Kodak Company
InventorsDinesh Tyagi, Louise Granica
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Abstract
A black toner composition is disclosed. The composition includes toner particles prepared by a chemical process of manufacture including carbon black pigment, a first addition polymer comprising carboxylic acid groups along the polymer backbone, and a thermoplastic second polymer binder distinct from the first addition polymer. In the composition, the first polymer has an Acid Value of from 30 to 220 and is present at a weight ratio of greater than 1:2 relative to the amount of carbon, and at a relatively lower weight percent than the second polymer.
Claims8
A black toner composition comprising toner particles prepared by a chemical process of manufacture comprising carbon black pigment, a first addition polymer comprising carboxylic acid groups along the polymer backbone, and a thermoplastic second polymer binder distinct from the first addition polymer, wherein the first polymer has an Acid Value of from 50 to 200 and is present at a weight ratio of greater than 1:2 relative to the amount of carbon black pigment, and at a relatively lower weight percent than the second polymer, and wherein the first addition polymer covers and shields the carbon black pigment particles.
Dependencies are inferred from the claim text.