Gel organosol including amphipathic copolymeric binder...

Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...

Reexamination Certificate

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C430S117200, C430S137220

Reexamination Certificate

active

07008745

ABSTRACT:
The invention provides liquid toner compositions in which the polymeric binder is chemically grown in the form of copolymeric binder particles dispersed in a liquid carrier. The polymeric binder includes one amphipathic copolymer comprising one or more S material portions and one or more D material portions, wherein the S material portion of the copolymer has molecular weight and solubility properties selected to provide a three dimensional gel of controlled rigidity which can be reversibly reduced to a fluid state by application of energy. The toners as described herein surprisingly provide compositions that are particularly suitable for electrophotographic processes wherein the transfer of the image from the surface of a photoconductor to an intermediate transfer material or directly to a print medium is carried out without film formation on the photoconductor.

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5 pgs, European Search Report, EP 04 25 3870 and Annex dated Oct. 7, 2004.
U.S. Appl. No. 10/612,058, filed Jun. 30, 2003, entitled “Gel Organosol Including Amphipathic Copolymeric Binder Having Acid/Base Functionality and Liquid Toners for Electrophotographic Applications” (74 pgs).
U.S. Appl. No. 10/612,448, filed Jun. 30, 2003, entitled “Gel Organosol Including Amphipathic Copolymeric Binder Having Hydrogen Bonding Functionality and Liquid Toners for Electrophotographic Applications”(74 pgs).
U.S. Appl. No. 10/612,444, filed Jun. 30, 2003, entitled “Gel Organosol Including Amphipathic Copolymeric Binder Having Crosslinking Functionality and Liquid Toners for Electrophotographic Applications” (63 pgs.).

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