摘要:
A process for producing positively charged polymer encapsulated particles which have a size of less than 5 μm and which include a positively charged polymer shell surrounding a core of particle. The process includes the steps of, firstly, dispersing the core particles in an aqueous solution; adding a mixture of monomers either before or after the dispersion step; then, polymerizing the monomers in view of obtaining polymer encapsulated particles, wherein the polymer shell of the particle includes polymers or co-polymers that have a functional group FG. Finally, the process includes the step of dispersing the encapsulated particles with surfactants and charge directors in view of obtaining positively charged encapsulated particle dispersions.
摘要:
A printing system (30, 40, 40′, 50, 50′) includes at least one ejector coupled to a reservoir (38) that is configured to contain a printing composition including a hydrocarbon having at least one unsaturated bond. The hydrocarbon is configured to at least one of polymerize or crosslink in the presence of a reactive species. The at least one ejector is configured to eject the printing composition onto a surface (34, 36, 10). The system (30, 40, 40′, 50, 50′) further includes a corona generator (32, 32′, 32″, 32′″) configured to generate the reactive species in situ. The corona generator (32, 32′, 32″, 32′″) is positioned with respect to the reservoir (38) such that the reactive species is exposed to the printing composition after the printing composition has been ejected onto the surface (34, 36, 10). The polymerizing and/or the cross-linking of the hydrocarbon is configured to form a polymer matrix (12) from the ejected printing composition.
摘要:
A polymer-encapsulated colorant nanoparticle includes a colorant nanoparticle core, and a polymer coating established on the colorant nanoparticle core. A negatively chargeable functional group is present on a surface of the polymer-encapsulated colorant nanoparticle.
摘要:
A method of forming ionically-charged, colorant nanoparticles involves forming in-situ ionically-charged polyurethane monomers, and forming an emulsion including the ionically-charged polyurethane monomers and a colorant nanoparticle. The method further involves polymerizing or crosslinking the ionically-charged polyurethane monomers in the emulsion, where the polymerizing or crosslinking chemically attaches the ionically-charged polyurethane monomers to a surface of the colorant nanoparticle to form an ionically-charged encapsulation layer on the surface.
摘要:
Methods of encapsulating particles (260) in polymer (275, 380, 385) and compositions of matter using such encapsulated particles (260). Methods include mixing particles (260) of one or more materials with one or more initial polymerizable monomers (265) to form a first suspension of monomer-wetted particles (260/265), mixing the first suspension with an aqueous dispersant medium (270) to form a second suspension, adding one or more initial reaction initiators to at least one of the first suspension and the second suspension, subjecting the second suspension to homogenization to form a stable submicron emulsion having an aqueous continuous phase, and reacting available polymerizable monomers (265) of the emulsion to encapsulate the particles (260) in one or more layers of polymer (275, 380, 385).
摘要:
A polymer-encapsulated colorant nanoparticle includes a colorant nanoparticle core, and a polymer coating established on the colorant nanoparticle core. A negatively chargeable functional group is present on a surface of the polymer-encapsulated colorant nanoparticle.
摘要:
A liquid electrophotographic ink is disclosed herein. One example of the liquid electrophotographic ink includes a non-polar carrier liquid; pigmented toner particles; a charge director; and polymer resin encapsulated metal oxide nanoparticles. A method for making the liquid electrophotographic ink is also disclosed herein.
摘要:
An ink forming method involves preparing a deagglomerated ink or a modified deagglomerated ink. The deagglomerated ink or the modified deagglomerated ink includes at least deagglomerated colorant particles and a liquid component. The deagglomerated colorant particles are chosen from pigment particles each encapsulated with a dispersant. The colorant particles have a particle size ranging from about 50 nm to about 500 nm. Prior to shipping and/or storing the deagglomerated ink or the modified deagglomerated ink, a portion of the liquid component is removed to form a concentrated ink that has a nonvolatile solids content ranging from about 40 wt % to about 90 wt % of the concentrated ink.
摘要:
An ink composition includes a particulate pigment, a hydrocarbon vehicle, an organic polyamine and an organic polyacid. A ratio by weight percent of the organic polyamine to the organic polyacid in the hydrocarbon vehicle is sufficient to render a conductivity of the ink composition to equal to or less than 15 nanosiemens per centimeter. The ink composition is prepared by combining the particulate pigment with a composition that includes the hydrocarbon vehicle, the organic polyamine and the organic polyacid. The combination is subjected to conditions under which the particulate pigment becomes dispersed in the composition.
摘要:
Methods of surface modification of polymer particle are useful in the development of marking fluids. The surface modification includes saponifying one or more acrylic ester groups on a surface of the polymer particle.