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US RE49,572 E1Granted
Imaging processes
AssigneeXerox Corporation
InventorsRichard P. N. Veregin, Eric Rotberg, Edward Graham Zwartz, Suxia Yang, Daryl W. Vanbesien, Cuong Vong, Karen Ann Moffat
Life of this patent
Estimating the term…
Abstract
The present disclosure provides processes for producing images with toner particles. In embodiments, toner particles of a certain diameter in size are applied to a substrate as an incomplete monolayer, and then fused to form an image that is a complete monolayer and possesses a thickness less than the diameter of the particles utilized to form the image.
Claims43
A toner comprising low melt emulsion aggregation toner particles having a core and a shell, wherein the emulsion aggregation toner particles comprise:
- a combination of amorphous polyester resins comprising a first amorphous polyester resin and second amorphous polyester resin, the first amorphous polyester resin comprising dodecenylsuccinic acid, the first and second amorphous polyester resins each having a number average molecular weight (Mn) of from about 2,000 to about 8,000, the combination of amorphous polyester resins having a melt viscosity of from about 10 to about 1,000,000 Pa*S at about 130° C;
- a low molecular weight amorphous polyester resin which exhibits a glass transition temperature of from about 30° C. to about 120° C. and having a number average molecular weight (Mn) of from about 2,000 to about 8,000, the low molecular weight amorphous polyester resin comprises a combination of low molecular weight amorphous polyester resins, wherein the at least one of the amorphous polyester resin resins is present in an amount of from about 30% to about 45% by weight of the emulsion aggregation toner particles, and further wherein the combined amorphous polyester resins have a melt viscosity of from about 10 to about 1,000,000 Pa*S at about 130° C.;
- a crystalline polyester resin which exhibits a melting temperature of from about 50° C. to about 90° C.;
- and
- a pigment colorant present in an amount of from about 7% to about 40% by weight of the toner;
- wherein the emulsion aggregation toner particles have a volume average particle diameter of about 2 μm to about 7 μm;
- further wherein the toner possesses a toner charge per mass ratio (Q/m) of from about −3 ρC μC/gram to about −90 ρC μC/gram.
4 more elements
A toner comprising emulsion aggregation toner particles having a core and a shell, wherein the emulsion aggregation toner particles comprise:
- a combination of amorphous polyester resins comprising a first amorphous polyester resin and a second amorphous polyester resin, the first amorphous polyester resin comprising trimellitic acid, the first and second amorphous polyester resins each having a number average molecular weight (Mn) of from about 2,000 to about 8,000, the combination of amorphous polyester resins having a melt viscosity of from about 10 to about 1,000,000 Pa*S at about 130° C. and a glass transition temperature of from about 30° C. to about 80° C.;
- wherein at least one of the first and second amorphous polyester resins is present in an amount of from about 30% to about 45% by weight of the emulsion aggregation toner particles;
- a crystalline polyester resin which exhibits a melting temperature of from about 50° C. to about 90° C.;
- wherein the crystalline polyester resin is present in an amount of from 1% to about 15% by weight of the emulsion aggregation toner particles;
- and
- a colorant present in an amount of from about 7% to about 40% by weight of the toner;
- wherein the emulsion aggregation toner particles have a volume average particle diameter of about 4 μm to about 6 μm, and
- wherein the toner possesses a toner charge per mass ratio (Q/m) of from about −3 μC/gram to about −90 μC/gram.
5 more elements
A toner comprising emulsion aggregation toner particles having a core and a shell, wherein the emulsion aggregation toner particles comprise:
- a combination of amorphous polyester resins comprising a first amorphous polyester resin and a second amorphous polyester resin, the first amorphous polyester resin comprising dodecenylsuccinic acid, the second amorphous polyester resin comprising trimellitic acid, the first and second amorphous polyester resins each having a number average molecular weight (Mn) of from about 2,000 to about 8,000, the combination of amorphous polyester resins having a melt viscosity of from about 10 to about 1,000,000 Pa*S at about 130° C. and a glass transition temperature of from about 30° C. to about 80° C.;
- wherein the second amorphous polyester resins is present in an amount of from about 35% to about 45% by weight of the emulsion aggregation toner particles;
- a crystalline polyester resin which exhibits a melting temperature of from about 50° C. to about 90° C.;
- and
- a colorant present in an amount of from about 7% to about 40% by weight of the toner;
- wherein the emulsion aggregation toner particles have a volume average particle diameter of about 2 μm to about 7 μm, and the toner possesses a toner charge per mass ratio (Q/m) of from about −3 μC/gram to about −90 μC/gram.
3 more elements
Dependencies are inferred from the claim text.