Nova Patents
EP1653291A3

Dry toner blended with wax

Abstract

Dry electrographic toner compositions are provided comprising a plurality of dry toner particles, wherein the toner particles comprise polymeric binder comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions. The dry electrographic toner composition comprises a wax associated with the dry toner particles, wherein substantially all of the wax is associated with the toner particle at the surface thereof. Methods of making electrographic toner compositions are also provided comprising preparing polymeric binder particles comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions, preparing toner particles, drying the toner particles, and milling the dry toner particles in the presence of a wax component to provide a dry toner particle composition having the wax associated with the toner particles. These toner compositions provide images having excellent durability and erasure resistance properties at low fusion temperatures and with little undesired offset.

Term

Term ended

Projected expiry passed 30 September 2025, 1 year ago.

  1. Priority
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  4. Projected expiry
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Every citation, both ways

Citations
DocumentRelationOfficeCategoryCited duringRelevant claims
EP1396762A1CitesEuropean Patent Office (EPO)XSearch report1-4,7,9,10,13,14,16
EP1420304A1CitesEuropean Patent Office (EPO)ASearch report1,15,16
US5061587ACitesUnited States of AmericaXSearch report1-5,7,9,10,13-16
US6136490ACitesUnited States of AmericaXSearch report1-5,16