Siloxane surfactants as liquid developer additives
AssigneeXerox Corporation
InventorKathryn A. Pearlstine
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Abstract
A liquid developer contains a liquid dispersion medium, marking particles, a polymeric surfactant, an optional colorant, and an optional charge control agent. The polymeric surfactant may be a siloxane surfactant, preferably a siloxane-alkene oxide block copolymer. To prepare the liquid developer, the surfactant may be added as a post additive to previously-formed developer.
Claims17
A liquid electrostatic developer which provides high resolution and improved image transfer efficiency comprising a liquid dispersion medium, marking particles and a polymeric siloxane surfactant, wherein said polymeric siloxane surfactant is a siloxane-alkylene oxide block copolymer and is present in an amount effective to improve image transfer efficiency.
A method of preparing a liquid electrostatic developer which provides high resolution and improved image transfer efficiency comprising adding a polymeric siloxane surfactant to a dispersion comprising a liquid dispersion medium and marking particles, wherein said polymeric siloxane surfactant is a siloxane-alkylene oxide block copolymer and is added in an amount effective to improve image transfer efficiency.
A liquid electrostatic developer which provides high resolution and improved image transfer efficiency, consisting essentially of a liquid dispersion medium, marking particles, and a siloxane-alkylene oxide copolymer, wherein said copolymer is present in an amount effective to improve transfer efficiency.
Dependencies are inferred from the claim text.