摘要:
A process involving, for example, the admixing of an emulsion latex, a colorant, and a tetra-alkylated quaternary ammonium halide salt complexing agent; and thereafter, heating in sequence about below the Tg of a resin contained in the latex and then heating about above the Tg glass transition temperature of a resin contained in the latex.
摘要:
A process for the preparation of toner comprising generating a latex emulsion of resin, water, and an ionic surfactant, and a colorant dispersion of a surface modified colorant and water, and wherein the latex emulsion is blended with the surface modified colorant dispersion; heating the resulting mixture below or equal to about the glass transition temperature (Tg) of the latex resin to form aggregates; optionally adding a second latex comprised of submicron resin particles suspended in an aqueous phase resulting in a shell or coating wherein the shell is optionally of from about 0.1 to about 1 micron in thickness, and wherein optionally the shell coating is contained on 100 percent of the aggregates; heating the resulting aggregate suspension above about the Tg of the latex resin; and optionally isolating the toner.
摘要:
A method for preparing thermoplastic toner resins is disclosed and the toner resins produced by said method. More particularly, an emulsion polymerized resin, constituting a high molecular weight component, is used as a seed for subsequent suspension polymerization of a lower molecular weight component. The emulsion micelles are swelled with monomers and subsequent suspension polymerization produces particles where the high and low molecular weight components are interpenetrated to form a resin with a bimodal distribution of molecular weight. A toner composition is made using the resin as the main component. The resin particle has a first resin portion having a particle size in the range of about 50 to about 200 nm. and a number average molecular weight in the range of about 104 to about 107, and a second resin portion formed around the first resin portion with a number average molecular weight lower than that of said first resin portion, the resin having a polydispersity in the range of 5 to 50.
摘要:
A toner process comprising mixing an acidified dispersion of an acicular magnetite with an anionic latex, an anionic carbon black dispersion, and an anionic wax dispersion.
摘要:
Disclosed is a single-layer type electrophotosensitive material comprising a conductive substrate and a photosensitive layer made of a binder resin containing at least an electric charge generating material and an electric charge transferring material, which is formed on the conductive substrate, wherein an oxygen transmission rate of the binder resin is not more than 35 cc·mm/m2·day·atom, wherein it is preferred that a mobility at an electric field strength of 5×105 V/cm of the hole transferring material is not less than 5×10−6 cm2/V/sec and a solid content of the electric charge transferring material is not less than 30% by weight and not more than 50% by weight based on the whole solid content; said electrophotosensitive material has good ozone resistance and does not cause defects such as image black belt due to lowering of the charge capability, an ozone of which is 5.0 ppm at most, and is also superior in sensitivity and wear resistance.
摘要:
A process for preparing an imaging member includes applying an organic layer to an imaging member substrate, treating the organic layer and/or a backside of the substrate with a corona discharge effluent, and applying an overcoating layer to the organic layer and/or an anticurl backing layer to the backside of the substrate.
摘要:
A medical implant of ultrahigh molecular weight polyethylene having an improved balance of wear properties and oxidation resistance is prepared by irradiating a preform of ultrahigh molecular weight polyethylene, annealing the irradiated preform in the absence of oxygen to a temperature at or above the onset of melting temperature, and forming an implant from the stabilized cross-linked polymer. Implants prepared according to the process of the present invention have comparable oxidation resistance and superior wear performance compared to unirradiated ultrahigh molecular weight polyethylene.
摘要:
Compounds of the formula (I) in which the substituents are as defined in claim 1 are valuable colorants for the mass coloring of polymers, with fluorescence property, in electrophotographics toners and developers, in powders coating materials and ink-jet inks.
摘要:
Antihalation compositions and methods for reducing the reflection of exposure radiation of a photoresist overcoated said compositions. The antihalation compositions of the invention comprise a resin binder and material capable of causing a thermally induced crosslinking reaction of the resin binder.
摘要:
A method for increasing the etch resistance of positive working chemically amplified photoresist such as 193 nanometer sensitive photoresist, 157 nanometer sensitive photoresist, and deep-UV 248 nanometer sensitive photoresist while improving and maintaining fidelity of lithographic features and critical dimensions. The method involves coating and drying a photosensitive composition onto a substrate. The photosensitive composition comprises a water insoluble, acid decomposable polymer which is substantially transparent to ultraviolet or x-ray radiation and a compound capable of generating an acid upon exposure to sufficient activating ultraviolet, electron beam or x-ray radiation energy. After imagewise exposing and developing, the image areas of the photosensitive composition are irradiated to electron beam radiation to thereby increase the resistance of the photosensitive composition in the image areas to an etchant while simultaneously cooling the photosensitive composition during electron beam radiation to maintain the photosensitive composition at a temperature of less than about 20° C.