Polyester resin toner produced by emulsion aggregation

A method of forming a chemically processed toner comprising:

• forming a polyester dispersion including a polyester having an acid value of about 5 to about 50, a peak MW as determined by gel permeation chromatography of about 2500 to about 40,000, a molecular weight distribution of about 2 to about 30 and a particle size of about 50 to about 500 nanometers, by combining said polyester in an organic solvent that is miscible with water and introducing water and removing substantially all of said organic solvent wherein said dispersion has a pH of about 6 to about 8;
• forming a pigment dispersion including a pigment in the presence of a dispersant wherein said dispersant contains a hydrophilic component and a hydrophobic component and indicates the onset of a glass transition temperature of about 40-130° C. and wherein the weight percent of pigment (P) divided by the weight percent of dispersant (D) provides a ratio P/D equal to about 1:1 to about 5:1 and wherein said pigment has a particle size of about 50 to about 500 nanometers;
• forming a release agent dispersion including a release agent in the presence of a dispersant wherein said dispersant contains a hydrophilic component and a hydrophobic component and indicates the onset of a glass transition temperature of about 40 to about 130° C. wherein the weight percent of release agent (RA) divided by the weight percent of dispersant (D) provides a ratio RA/D equal to about 1:1 to about 15:1 and wherein said release agent has a particle size of about 50 to about 800 nanometers;
• and
• combining said polyester dispersion, said pigment dispersion and said release agent dispersion and agglomerating in the presence of agglomerating agent, heating and recovering agglomerated toner particles wherein said toner particles have mean particle size of about 3 to about 15 microns and an average degree of circularity of between about 0.90 to about 1.0.

A method of forming a chemically processed toner comprising:

• forming a polyester dispersion including a polyester having an acid value of about 5 to about 50, a peak MW as determined by gel permeation chromatography of about 2500 to about 40,000, a molecular weight distribution of about 2 to about 30 and a particle size of about 50 to about 500 nanometers, by combining said polyester in an organic solvent that is miscible with water and introducing water and removing substantially all of said organic solvent wherein said dispersion has a pH of about 6 to about 8;
• forming a pigment dispersion including a pigment in the presence of a dispersant wherein said dispersant contains a hydrophilic component and a hydrophobic component wherein the weight percent of pigment (P) divided by the weight percent of dispersant (D) provides a ratio P/D equal to about 1:1 to about 8:1 and wherein said pigment has a particle size of about 50 to about 500 nanometers;
• forming a release agent dispersion including a release agent in the presence of a dispersant wherein said dispersant contains a hydrophilic component and a hydrophobic component wherein the weight percent of release agent (RA) divided by the weight percent of dispersant (D) provides a ratio RA/D equal to about 1:1 to about 15:1 and wherein said release agent has a particle size of about 50 to about 800 nanometers;
• and
• combining said polyester dispersion, said pigment dispersion and said release agent dispersion and agglomerating in the presence of agglomerating agent, heating and recovering agglomerated toner particles wherein said toner particles have mean particle size of about 1 to about 10 microns and an average degree of circularity of greater than about 0.93.