Electrophotographic liquid developer with charge director
AssigneeLexmark International, Inc.
InventorsBradley L. Beach, Carla M. Butler, Terence E. Franey, Ashok Murthy, Pramod K. Sharma, Ajay K. Suthar
Life of this patent
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Abstract
A liquid toner having a mineral oil vehicle, a blend of Surlyn ionomeric resin and Nucrel resin, pigment and, as charge director, lecithin, N-methyl-2-pyrrolidone and calcium Petronate. The charge director optimizes speed of recovery of charge properties during continual use. The mineral oil does not vaporize well and is readily condensed, thus permitting use as a confined toner.
Claims15
A liquid toner comprising mineral oil as a vehicle, resin particles comprising a thorough mixture of an ionomeric resin and the acid form of a resin otherwise of the same structural form of said ionomeric resin, said resins being in a ratio of about 6 parts by weight of said ionomeric resin to 4 parts by weight said acid resin, at least one pigment, and charge control materials.
A liquid toner comprising mineral oil as a vehicle, resin particles comprising a thorough mixture of an ionomeric resin and the acid form of a resin otherwise of the same structural form of said ionomeric resin, said resins being in a ratio of about 6 parts by weight of said ionomeric resin 4 parts by weight of said acid resin, at least one pigment and, as charge control materials, lecithin, N-methyl-2-pyrrolidone, and calcium Petronate.
Dependencies are inferred from the claim text.