摘要:
Disclosed is an electrophoretic ink comprising a suspending fluid and, suspended in the suspending fluid, a plurality of particles comprising a mixture of a chelating agent and a spiropyran material of the formula wherein n is an integer representing the number of repeat —CH2— units and R is —H or —CH═CH2, the particles being free to migrate within the suspending fluid under the influence of an electric field.
摘要:
A process for the preparation of toner which comprises (i) preparing a pigment dispersion comprised of a pigment dispersed in an ionic surfactant; (ii) shearing said pigment dispersion with a latex or emulsion blend comprised of resin particles and a counterionic surfactant; (iii) heating the above sheared blend below the glass transition temperature (Tg) of said resin particles to form electrostatically bound toner size aggregates; (iv) adding a stabilizer of in situ tricalcium phosphate solid particulants generated from a solution of calcium chloride and trisodium phosphate; (v) heating the mixture of (iii) and (iv) above about the Tg of the resin particles to obtain toner size particles comprised of resin and pigment; (vi) washing with an acid to dissolve the trisodium phosphate; and (vii) optionally washing with water, and optionally drying the toner obtained.
摘要:
A process for the preparation of an encapsulated toner composition comprised of a core and a shell thereover, which process comprises mixing an organic phase comprised of an olefinic monomer, pigment, and a first resin A soluble in the organic phase; dispersing the organic phase into microdroplets in an aqueous solution comprised of a surfactant; subjecting the resulting mixture to free radical polymerization by heating wherein the olefinic monomer is converted to a second resin B; and wherein said resin B is incompatible with said resin A and phase separates whereby a core and shell results.
摘要:
A process for the preparation of toner compositions which comprises dissolving a polymer, and optionally a pigment in an organic solvent; dispersing the resulting solution in an aqueous media containing a surfactant, or mixture of surfactants; stirring the mixture with optional heating to remove the organic solvent thereby obtaining suspended particles of about 0.05 micron to about 2 microns in volume diameter; subsequently homogenizing the resulting suspension with an optional pigment in water and surfactant; followed by aggregating the mixture by heating thereby providing toner particles with an average particle volume diameter of from between about 3 to about 21 microns when said pigment is present.
摘要:
Embodiments include a toner with a fractionated and/or distilled wax having from about 30 to about 64 carbon units, a degree of crystallinity as calculated by heat of melting and as measured by DSC of from about 55 to about 100, a Mw is from about 500 to about 800, and a polydispersity of from about 1 to about 1.05.
摘要:
The toner includes emulsion aggregation toner particles of a binder including a non-crosslinked styrene acrylate polymer, at least one colorant, at least one wax, and aluminized silica, wherein an amount of aluminum metal in the toner particles is from about 50 ppm to about 600 ppm. Such toner is able to provide a high level of gloss while maintaining a low minimum fixing temperature. The aluminized silica acts as a coagulant during the emulsion aggregation formation process of the toner.
摘要:
A chemical toner and an emulsion aggregation process for preparing the chemical toner, wherein the chemical toner is composed of: (a) a resin including a compound which exhibits a molecular weight polydispersity of from about 1.1 to about 3.0 (where the resin is produced by a stable free radical polymerization process); (b) an optional wax; and (c) a colorant, wherein the particle size of the chemical toner exhibits a geometric standard deviation of about 1.25 or less.
摘要:
Disclosed is a display comprising an arrangement of a plurality of optically anisotropic rotatable elements, each of the rotatable elements having a surface in contact with an enabling fluid, the rotatable elements being electrically dipolar in the presence of the enabling fluid and thus being subject to rotation upon application of an electric field, the rotatable elements being free to rotate in place but not free to translate substantially so as to disrupt the arrangement of rotatable elements, wherein a first portion of the surface contains a mixture of a chelating agent and a spiropyran material of the formula wherein n is an integer representing the number of repeat —CH2— units and R is —H or —CH═CH2, and wherein a second portion of the surface contains substantially no spiropyran.
摘要:
A toner comprised of a core comprised a first resin and colorant, and thereover a shell comprised of a second resin and wherein said first resin is an ion complexed sulfonated polyester resin, and said second resin is a transition metal ion complex sulfonated polyester resin.
摘要:
A surfactant free process for the preparation of toner comprising heating a mixture of an emulsion latex, a colorant, and an organic complexing agent.