Abstract: Ink jet inks and liquid developers are disclosed which contain colored particles comprising hydrophilic silica particles, to the surfaces of which dyes are covalently bonded through silane coupling agents. The ink jet inks generally comprise a liquid medium and a plurality of the colored silica particles. The liquid developers generally comprise a liquid medium, a resin, a plurality of the colored silica particles, and a charge control agent. The particles are prepared by a process which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form particles having covalently attached thereto coupling agents, followed by reacting a dye with the coupling agent attached to the silica particles.

Abstract: An electrophotographic is disclosed, comprising a binder resin, a coloring material, and a polyalkylene, wherein the polyalkylene has an average particle volume of 0.05 .mu.m.sup.3 or more. The toner exhibits broadened fixing latitude when fixed by heat roll fixing without using any offset inhibiting liquid.

Abstract: A toner comprising capsule particles composed of a core and an outer shell wherein the capsule particles have at least a substance capable of forming a radical at the surface thereof, and the capsule particles have adhered on the outer shell a copolymer comprising a hydrophilic vinyl monomer unit and a hydrophobic vinyl monomer unit. The toner exhibits stable chargeablity against environmental changes with a narrow charge distribution.

Abstract: A dispersion polymerization process for the preparation of styrene butadiene polymers with an average particle diameter of from about 0.1 to about 200 microns, which comprises (1) formation of a homogenous reaction medium, containing styrene and butadiene monomers in the presence of a steric stabilizer and a chain propagating amount of an initiator; and (2) heating said homogeneous reaction medium under pressure permitting polymerization thereby resulting in the formation of insoluble styrene butadiene polymer particles.

Abstract: Photoconductive polycarbonate block copolymers are provided containing alternate polycarbonate blocks and photoconductor blocks. The photoconductive blocks are copolymers of polyesters and/or polycarbonates with reactive photonconductors which are preferably difunctional polyols and/or carboxylic acid derivatives. The block copolymers when blended with dyes form photoconductive layers in photoconductor elements which are photosensitive and highly resistant to solvent degradation. Dyes are aggregatable in such a block copolymer matrix.

Abstract: A process for the preparation of polymer particles with an average diameter of from about 0.1 to about 40 microns, which comprises (1) mixing at least one monomer with a free radical polymerization initiator, and an initiator capable of being activated with light, which monomer mixture is dispersed in an aqueous phase containing a surfactant; (2) subjecting the aforementioned mixture of (1) to light irradiation for an effective period of time to accomplish stabilization of the mixture, while initiating photopolymerization of the monomer, and (3) subsequently heating the aqueous phase thereby completing polymerization of the monomer.

Abstract: Image creation apparatus operable in a tri-level highlight color imaging or a black monochrome mode. The developer structures are biased in the tri-level mode using a chopped DC bias while in the monochrome black mode only the black developer structure is biased using a standard monochrome bias.