Abstract: New quaternary ammonium salts are provided having advantageous utility as charge agents in electrostatographic toners and developers. The salts have the structure ##STR1## wherein R is alkyl having 12 to 18 carbon atoms.

Abstract: New quaternary ammonium salts are provided having advantageous utility as charge agents in electrostatographic toners and developers. The salts have the structure. ##STR1## wherein R is alkyl having 12 to 18 carbon atoms.

Abstract: New quaternary ammonium salts are provided having advantageous utility as charge agents in electrostatographic toners and developers. The salts have the structure ##STR1## wherein R is alkyl having 12 to 18 carbon atoms.

Abstract: New electrostatographic toners and developers are provided containing new charge-control agents comprising quaternary ammonium salts having the structure ##STR1## wherein R is alkyl having 12 to 18 carbon atoms.

Abstract: The image transfer properties and other properties of a fusible dry toner composition are improved by blending the binder resin of the toner with a multiphase polyorganosiloxane block or graft condensation copolymer which provides polyorganosiloxane domains of particular size and concentration at the toner particle surfaces.

Abstract: The invention provides new crosslinked vinyl polymer particles, new coating compositions containing such particles, new liquid electrographic developers containing such particles, new electrographic elements containing one or more layers comprising such particles, and new electrographic records containing toner images and/or layers comprising such particles.The polymeric particles of the invention are characterized in that each particle has an average diameter less than one micrometer and comprises a crosslinked vinyl addition copolymer obtainable by aqueous emulsion polymerization of a mixture of monomers wherein:1.5-15 percent by weight of the mixture of monomers comprises polyfunctional vinyl addition-polymerizable monomers in order to form crosslinking structural units in the copolymer;85-98.5 percent by weight of the mixture of monomers comprises monofunctional vinyl addition-polymerizable monomers selected such that:A. 0-98.

Abstract: In plural-stage liquid development of electrostatic charge patterns, as in multicolor electro-photography, image defects occur in areas of the image which are undeveloped or background areas of a previous development stage. The method of the invention avoids such defects by rinsing the image with a polar liquid between development stages to remove counterions which are believed to cause the defects.

Abstract: A method of forming an image is disclosed in which chemically active toner particles are used to trigger image amplification chemistry after their attraction to an electrostatic charge pattern.The method of forming an image comprises applying electrographic toner particles to a charge pattern on a support followed by a chemical amplification processing step comprising heating the toner image in the presence of an image-receiving element comprising:(a) a cobalt(III) complex capable of releasing an amine on processing, and(b) an amplifier which, on reaction with an amine:(i) forms a dye or dye precursor, or(ii) reduces the cobalt(III) complex, resulting in the release of additional amine,said toner comprising an activator which, under the conditions of processing releases an amine either directly or indirectly.

Abstract: Liquid electrographic developers are disclosed comprising an electrically insulating liquid carrier, toner, a charge-control agent and a charging agent. The charge-control agent is a carrier-soluble, addition copolymer of a quaternary ammonium salt monomer, a monomer having --COOH, --SO.sub.3 H or --PO.sub.3 HR acidic function wherein R is hydrogen or alkyl, and a solubilizing monomer. The charging agent is a carrier-soluble, addition polar copolymer. The disclosed developers exhibit improved replenishability as evidenced by reduced buildup of charge in the developers during the course of use and repeated replenishment.

Abstract: A liquid electrostatic image developer is disclosed which forms self-fixing images on an electrostatic image-bearing surface which may be the image-forming surface. The developer comprises a plurality of particles composed of a compatible blend of at least one polyester resin and at least one polyester plasticizer. The plasticizer contains essentially no curable groups and is insoluble in the liquid carrier. Furthermore, images from certain preferred developers containing dispersed colorants are crack-resistant in addition to self-fixing.

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: A planar array of microcells is formed in a support. An electrostatic charge pattern is established on the support differentiating first and second interlaid sets of microcells. An electrographic imaging composition is introduced into the first set of microcells, and a second, differing imaging composition is introduced into the second set of microcells. Multicolor photographic elements, particularly dye image transfer photographic elements, can be prepared.