Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Reexamination Certificate
2008-01-15
2008-01-15
Chapman, Mark A. (Department: 1756)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
C430S109300, C430S110200, C430S137120
Reexamination Certificate
active
07318988
ABSTRACT:
The invention provides dry electrographic toner compositions comprising toner particles. 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 prepared from an organosol reaction process utilizing a liquid carrier reaction medium having a Kauri-Butanol number less than about 30 mL. The S material portion comprises at least one soluble component and at least one non-sorptive component, wherein the non-sorptive component is the reaction product of monomers having an absolute difference in Hildebrand solubility parameter from the liquid carrier of about 3.0 MPa1/2or greater. Additionally, dry electrographic toner compositions are provided 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 S material portion of the amphipathic copolymer has an average Hildebrand solubility parameter of from about from about 16 MPa1/2to about 17.3 MPa1/2, and comprises at least one non-sorptive component having an average Hildebrand solubility parameter that is at least about 0.4 MPa1/2greater than the average Hildebrand solubility parameter of the S material portion.The resulting dry toner composition can exhibit excellent final image durability characteristics, and can also provide excellent images at low fusion temperatures on a final image receptor.
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Commonly assigned U.S. Appl. No. 10/975,557, filed Oct. 28, 2004 entitled “Liquid Toners Comprising Amphipathic Copolymeric Binder Having Insoluble Components in the Shell Portion Thereof”, in the Name of Jiayi Zhu et al.
Baker James A.
Zhu Jiayi
Chapman Mark A.
Kagan Binder PLLC
Samsung Electronics Company
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