US 2010/0248118 A1 · TONER PROCESSES

Abstract

The present disclosure provides toners and processes for making said toners. In embodiments, the toners are invisible when viewed under natural light, but possess a UV additive that renders them visible when exposed to UV light of a specific wavelength. By selecting the appropriate UV additive and ionic crosslinker, with optional chelating agent, the gloss of the toner may be tailored to match the gloss of any substrate, such as paper, to which the toner is to be applied, thereby further enhancing its invisibility under visible light.

Claims20

Dependent claims

A toner comprising:

at least one amorphous polyester resin;
at least one crystalline polyester resin;
at least one additive capable of becoming visible upon exposure to ultraviolet light at a wavelength of from about 200 nm to about 400 nm when placed on a substrate containing fluorescent materials;
and
optionally, one or more ingredients selected from the group consisting of waxes, coagulants, and combinations thereof,
wherein the gloss of the toner substantially matches the gloss of the substrate to which it is applied.

3 more elements

A process comprising:

contacting at least one amorphous polyester resin and at least one crystalline polyester resin in an emulsion;
contacting the emulsion with at least one additive capable of becoming visible upon exposure to ultraviolet light at a wavelength of from about 200 nm to about 400 nm when printed on a substrate possessing optical brighteners;
contacting the emulsion with an optional wax, and an optional coagulant to form a mixture;
aggregating small particles in the mixture to form a plurality of larger aggregates;
coalescing the larger aggregates to form toner particles;
and
recovering the particles.

4 more elements

A process comprising:

determining a gloss of a substrate;
contacting at least one amorphous polyester resin, and at least one crystalline polyester resin in an emulsion;
contacting the emulsion with at least one additive capable of becoming visible upon exposure to ultraviolet light at a wavelength of from about 200 nm to about 400 nm;
contacting the emulsion with at least one ionic crosslinker;
contacting the emulsion with an optional wax, and an optional coagulant to form a mixture;
aggregating small particles in the mixture to form a plurality of larger aggregates;
coalescing the larger aggregates to form toner particles;
and
recovering the toner particles,
wherein the toner particles possess a gloss that equals the gloss of the substrate.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/411,654Filed 26 Mar 2009

Published

30 Sep 2010

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

G03G 9/08755
Comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds: polyesters
G03G 9/0806
Whereby the components are brought together in a liquid dispersing medium: whereby chemical synthesis of at least one of the toner components…
G03G 9/0821
With toner particles: characterised by physical parameters
G03G 9/08797
Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775: characterised by their physical…

Toner processes

Life of this patent

Toner processes

Life of this patent

Abstract

Claims20