TONER COMPOSITIONS AND PROCESSES
First Claim
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1. A toner comprising:
- at least one amorphous resin;
at least one infrared absorber;
at least one crystalline resin;
an optional colorant; and
an optional wax,wherein the at least one infrared absorber has a maximum absorption of light at wavelengths of from about 850 nm to about 1100 nm.
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Abstract
An emulsion aggregation toner composition includes toner particles including: an unsaturated polymeric resin, such as amorphous resins, crystalline resins, and combinations thereof; an optional colorant; an optional wax; an optional coagulant; and an IR absorber. The use of an IR absorber may permit formation of color toners that have uniform gloss and crease properties, i.e., the IR absorbers may prevent gloss and crease differences between color and black toners.
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Citations
20 Claims
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1. A toner comprising:
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at least one amorphous resin; at least one infrared absorber; at least one crystalline resin; an optional colorant; and an optional wax, wherein the at least one infrared absorber has a maximum absorption of light at wavelengths of from about 850 nm to about 1100 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A printing apparatus, comprising:
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at least one heating device; a toner source; an optional contact fuser; a non-contact fuser comprising a source of infrared light operating at a wavelength of from about 750 nm to about 2500 nm; a substrate pre-heater; an image bearing member pre-heater; and a transfuser, wherein the toner comprises at least one amorphous polyester resin, at least one infrared absorber, at least one crystalline polyester resin, an optional colorant and an optional wax, and wherein the at least one infrared absorber has a maximum absorption of light at wavelengths of from about 850 nm to about 1100 nm and does not absorb light at wavelengths of from about 400 nm to about 750 nm. - View Dependent Claims (13, 14, 15, 16)
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17. A process comprising:
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contacting an emulsion comprising at least one amorphous resin with an infrared absorber, an optional crystalline resin, an optional colorant, and an optional wax; aggregating the particles to form aggregated particles; contacting the aggregated particles with at least one amorphous resin optionally in combination with an infrared absorber to form a shell over the aggregated particles; coalescing the aggregated particles to form toner particles; and recovering the toner particles, wherein the at least one infrared absorber has a maximum absorption of light at wavelengths of from about 850 nm to about 1100 nm. - View Dependent Claims (18, 19, 20)
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Specification