摘要:
A toner having an amorphous resin, a crystalline resin, and a colorant, wherein the crystalline resin has a melting temperature of at least 70° C. and a recrystallization point of at least 47° C. exhibits improved document offset properties and improved heat cohesion. Annealing the toner further improves the heat cohesion and morphology of the toner.
摘要:
A toner process that includes a first heating of a colorant dispersion, a first polyester resin free latex emulsion, a second polyester latex emulsion, and a wax dispersion in the presence of a coagulant containing a metal ion; adding a third polyester free latex; adding an organic sequestering compound or a silicate salt sequestering compound, followed by a second heating.
摘要:
Environmentally friendly toner particles are provided which may, in embodiments, include a biodegradable semi-crystalline polyester resin and a biodegradable amorphous polyester resin.
摘要:
An emulsion aggregation toner composition includes toner particles including: an unsaturated polymeric resin, selected from amorphous resins, crystalline resins, and mixtures thereof; an optional colorant; an optional wax; an optional coagulant; and a photo initiator capable of initiating crosslinking of said unsaturated polymeric resin.
摘要:
A process for making toner particles comprising: (a) forming an emulsion comprising a disperse phase including a first aqueous composition and a continuous phase including molten one or more ingredients of a toner composition, wherein there is absent a toner resin solvent in the continuous phase; (b) performing a phase inversion to create a phase inversed emulsion comprising a disperse phase including toner-sized droplets comprising the molten one or more ingredients of the toner composition and a continuous phase including a second aqueous composition; and (c) solidifying the toner-sized droplets to result in toner particles.
摘要:
A polyester resin emulsion includes crosslinked polyester resin in an emulsion medium, the crosslinked polyester resin having a degree of crosslinking of from about 0.1 percent to about 100 percent. The emulsion can be formed by solvent flashing a mixture of a polyester resin, an initiator, a solvent, and an emulsion medium, wherein the crosslinked polyester resin has a degree of crosslinking of from about 0.1 percent to about 100 percent.
摘要:
Processes for producing emulsion aggregation toners are provided. In embodiments, methods of the present disclosure may be utilized to produce toners suitable for low melt applications, including use in flexible packaging applications, where low pile height is desired for low cost and flexibility. In embodiments, the EA toners may be prepared by optimizing the particle size of the emulsion, the choice of and amount of aggregating agent utilized, and the solids content of the emulsion.
摘要:
A process for preparing a toner, includes solvent flashing wax and resin together to emulsify the resin and wax to a sub-micro size; mixing the wax and resin emulsion with a colorant, and optionally a coagulant to form a mixture; heating the mixture at a temperature below a glass transition temperature of the resin to aggregate the resin, colorant, and wax, to form aggregated particles; heating the aggregated particles and coalescent agent at a temperature above the glass transition temperature of said resin, to coalesce the aggregated particles to form toner particles, optionally cooling the mixture; and isolating the toner particles.
摘要:
A process for preparing toner particles and compositions adapted for use in preparing toners that comprise a blend of a first polyester resin with a second sharp melting polyester resin. The process includes forming an emulsion resin comprising a branched polyester resin, a crystalline polyester resin, a colorant, and optionally a wax. The resin mixture is aggregated using an aggregating agent, such as a zinc acetate solution, to form an aggregate mixture. The aggregate mixture is then coalesced at a temperature of from about 5 to about 20° C. above the Tg of the emulsion resin to produce the resultant toner particles.
摘要:
A process for preparing toner particles and compositions adapted for use in preparing toners that comprise a blend of a first polyester resin with a second sharp melting polyester resin. The process includes forming an emulsion resin comprising a branched polyester resin, a crystalline polyester resin, a colorant, and optionally a wax. The resin mixture is aggregated using an aggregating agent, such as a zinc acetate solution, to form an aggregate mixture. The aggregate mixture is then coalesced at a temperature of from about 5 to about 20° C. above the Tg of the emulsion resin to produce the resultant toner particles.