Abstract: A two-component, dry electrostatic developer composition containing toner particles and coated-carrier particles is disclosed. The toner contains a binder polymer and a phosphonium, arsonium or stibonium charge-control agent dispersed in the toner binder. The carrier is coated with a fluoropolymer. The resulting developer exhibits reduced toner throw-off and other disclosed advantages.

Abstract: A method for developing an electrostatic latent image on a nonporous surface using a self-fixing liquid developer is described. The developer contains a volatile, electrically insulating carrier, and toner particles, dispersed in the carrier, containing a polymer binder which has a Tg within the range from about -10.degree. C. to 30.degree. C. Upon application of the developer to a latent image and evaporating the liquid carrier from the image, the toner particles fix to the surface without externally applied heat other than from ambient conditions.

Abstract: The present invention provides novel composite electrically photosensitive particles. Each of said particle comprises a colorant and a polymeric binder comprising repeating units containing one or more structures selected from the classes consisting of triarylamines; p-aminotetraarylmethanes; 4,4'-bis(p-amino)triarylmethanes; 1,1-bis(p-aminoaryl)isobutanes; 1,1-bis(p-aminoaryl)cyclohexanes; N-alkyl-N,N-diarylamines; N,N-dialkyl-N-arylamines and heterocyclic nitrogen compounds having about 4 to 10 carbon atoms.

Abstract: In a photothermographic element comprising (A) at least one photosensitive layer comprising a photosensitive component, such as photosensitive silver halide or a diazotype photosensitive material, (B) at least one layer comprising a processing agent for the photosensitive component and (C) a separation polymer between (A) and (B), increased preexposure storage stability is provided by a polysulfonamide as separation polymer (C). After imagewise exposure of the photothermographic element, an image can be developed by merely heating the element to moderately elevated temperatures.

Abstract: A negatively charged liquid electrographic developer comprising an electrically insulating carrier liquid such as a paraffinic hydrocarbon fraction, having stably dispersed therein (a) a halogenated polymer, such as chlorinated polyethylene, and having dissolved therein (b) a copolymer of a quaternary ammonium salt monomer and a solubilizing monomer and (c) a copolymer of a polar monomer and a solubilizing monomer.

Abstract: Photoconductive layers and elements and methods for their use are disclosed. The layers and elements include polycarbonate binders and overcoats having pendant polar groups.

Abstract: Polyesterionomers having the structure ##STR1## wherein G.sup.1 represents a straight or branched chain alkylene having about 2 to 12 carbon atoms, or, substituted or unsubstituted cycloalkylene, cycloalkylenebis(oxyalkylene) or cycloalkylenedialkylene;G.sup.

Abstract: A negatively charged liquid electrographic developer comprising an electrically insulating carrier liquid such as a paraffinic hydrocarbon fraction, having stably dispersed therein (a) a halogenated polymer, such as chlorinated polyethylene, and having dissolved therein (b) a copolymer of a quaternary ammonium salt monomer and a solubilizing monomer and (c) a copolymer of a polar monomer and a solubilizing monomer.

Abstract: Liquid developers for electrography are provided containing soluble polymeric dispersing agents that comprise a phosphonate moiety. The phosphonate moiety comprises a phosphonic acid group, a half-ester of a phosphonic acid group, or a salt of either of these groups.

Abstract: Polyesterionomers useful as a binder in liquid electrophotographic developers having the structure are disclosed.

Abstract: Liquid developers for electrography comprise an electrically insulating carrier liquid containing (1) an addition polymer comprising a polar moiety and at least one additional moiety having predetermined solubility characteristics with respect to the carrier liquid, (2) a polymer comprising a phosphonate moiety, and (3) a halogenated polymer.

Abstract: Liquid developers for electrography are provided containing soluble polymeric dispersing agents that comprise a phosphonate moiety. The phosphonate moiety comprises a phosphonic acid group, a half-ester of a phosphonic acid group, or a salt of either of these groups.

Abstract: A polymer is disclosed having repeating units with the structures ##STR1## AND ##STR2## WHEREIN R.sup.1 and R.sup.2 are the same or different, and are each hydrogen, halogen or alkyl from 1 to about 3 carbon atoms,n is 2 or 3,x and y are mole percentage amounts of the respective repeating units,x ranging from 0 to about 90% and y being at least 10%, andZ represents the atoms necessary to form a saturated or unsaturated carbocyclic ring having from about 5 to about 7 carbon ring atoms.

Abstract: A light-sensitive vesicular imaging composition comprising a vesiculating agent which liberates gas upon exposure to activating radiation, and a binder which is a sulfonamide polymer having the sulfur-nitrogen linkage either in the polymer chain or as a pendant moiety. The composition is coated as a thin film. Imagewise irradiation of the element causes gas bubbles to be released in the exposed areas, which bubbles may be developed by overall heating to a visible record.

Abstract: The present invention relates to an electrographic developing composition containing finely divided carrier particles and finely divided toner particles having incorporated therein a fusible, crosslinked binder polymer. An improved electrographic developing process using such toner particles is also disclosed.

Abstract: The present invention relates to an electrographic developing composition containing finely divided carrier particles and finely divided toner particles having incorporated therein a fusible, crosslinked binder polymer. An improved electrographic developing process using such toner particles is also disclosed.