摘要:
A process for the preparation of polymers which comprises dissolving an emulsifier in a solvent, followed by heating the mixture formed; adding to the mixture an alkali persulfate initiator dissolved in a solvent; subsequently adding monomer thereto, which monomer is not miscible with said solvent, and wherein the monomer is added after a period of time of from about 1 second to about 60 minutes has elapsed after the addition of said dissolved initiator; and thereafter effecting polymerization.
摘要:
Disclosed is a liquid developer composition comprising a liquid vehicle, a charge control additive, and toner particles containing pigment particles and a resin selected from the group consisting of polyolefins, halogenated polyolefins, and mixtures thereof. Preferred resins include poly-.alpha.-olefins and chlorinated polypropylenes. The resin is soluble in the liquid vehicle at elevated temperatures and insoluble in the liquid vehicle at ambient temperatures. Also disclosed is a liquid developer composition comprising a liquid vehicle, pigment particles, a charge control additive, and a resin selected from the group consisting of polyolefins, halogenated polyolefins, and mixtures thereof, wherein the resin is soluble in the liquid vehicle at elevated temperatures and insoluble in the liquid vehicle at ambient temperatures, and wherein the liquid developer is prepared by dissolving the resin in the liquid vehicle at temperatures of from about 80.degree. C. to about 120.degree. C., subsequently adding the pigment particles to the resulting solution, attriting the resulting mixture for from about 20 minutes to about 75 minutes, cooling the mixture to ambient temperature over a period of from about 1 hour to about 3 hours with continuous mixing, and subsequently adding to the mixture the charge control additive.
摘要:
Disclosed is a process for forming secure images which comprises electrostatically charging an imaging member; imagewise exposing the charged member, thereby forming a latent image on the member; developing the latent image with a liquid developer comprising a liquid medium, a charge control additive, and toner particles comprising a colorant and a polymeric material; allowing the developed image to dry on the imaging member; contacting the portion of the imaging member with the dry developed image with a substantially transparent sheet having an adhesive material on the surface thereof in contact with the imaging member, thereby transferring the developed image from the imaging member to the substantially transparent sheet; contacting the adhesive surface of the substantially transparent sheet with the developed image with a paper sheet having a polymeric coating on the surface that is in contact with the substantially transparent sheet; and applying heat and pressure to the substantially transparent sheet and the paper sheet at a temperature and pressure sufficient to affix the image permanently to the paper. The resulting document is a paper sheet covered with the transparent sheet, with the developer material that forms the image being situated between the paper sheet and the transparent sheet. The disclosed process is generally useful for applications such as passport photographs, identification badges, banknote paper, and the like.
摘要:
Nanoscale pigment particles of phthalocyanine pigments are prepared by providing a unsubstituted phthalocyanine chromogen material and a substituted phthalocyanine chromogen material, reacting the unsubstituted phthalocyanine chromogen material and the substituted phthalocyanine chromogen material to form a mixture of unsubstituted phthalocyanine dye molecules and substituted phthalocyanine dye molecules, and causing the substituted phthalocyanine dye molecules to non-covalently associate with the unsubstituted phthalocyanine dye molecules, so as to limit an extent of particle growth and aggregation and result in nanoscale pigment particles.
摘要:
A phase change ink composition, comprising an anti-drool additive to prevent and/or reduce printhead and nozzle contamination in ink jet printers caused by drooling and fouling of the faceplate by the ink. In particular, there is provided sulfonated small molecules for use in phase change ink compositions and which are compatible with phase change ink components.
摘要:
A synergist for pigment in a solid ink having the following formula: where n is 1, 2, 3, or 4, X represents a metal, ammonium, or quaternary ammonium, R1, R2, and R3 independently represent H, C1-C20 alkyl, C1-C20 alkoxy, and halogen, A solid ink including the synergist having the above formula.
摘要:
An ink including at least one first reactive component, at least one second component comprising a triggerable component, at least one third reactive component, and an optional colorant; wherein the at least one first reactive component and the at least one third reactive component are capable of reacting with one another to form a solid ink on a substrate; wherein the at least one first reactive component is encapsulated in a microcapsule; wherein the ink can be jetted onto a substrate and treated whereby the treatment causes the at least one triggerable component to trigger the rupture of the microcapsule thereby releasing the at least one first reactive component from the microcapsule so that the at least one first reactive component and the at least one third reactive component come into contact, react, and polymerize thereby curing the ink.
摘要:
Disclosed is a phase change ink composition comprising a phase change ink carrier and a compound of the formula and dimers thereof, wherein R, R′, X, (Y)m; and (Z)n are as defined herein.
摘要:
A method of making a phase change ink composition includes adding to a device with a stirring element at least one pigment, at least one dispersant and at least one synergist, processing the device at an elevated temperature and at a stirring rate to wet the at least one pigment to obtain an ink concentrate, and mixing the ink concentrate with an ink vehicle to obtain the ink composition. The device may be an extruder, an attritor or the like. The method allows for the reduction in the amount of dispersant to include in the ink.
摘要:
A phase change ink composition includes an ink vehicle and at least one pigment, wherein the ink composition is substantially solid at room temperature and includes at least one dispersant for the at least pigment and at least one synergist.