Gamut toner aggregation processes

A process for the preparation of a combination of four colored toners for the development of electrostatic latent images enabling the formation of a full color gamut image, and wherein the four toners are comprised of a first cyan toner, a second magenta toner, a third yellow toner, and a fourth black toner, each of said toners being comprised of resin and pigment, and wherein the pigment is cyan, magenta, yellow and black, and wherein each toner in the combination is prepared by

• (i) providing a pigment dispersion, which dispersion is comprised of a pigment, and the nonionic water soluble surfactant 2,4,7,9-tetramethyl-5 decyne-4,7-diol containing isopropyl alcohol, 2,4,7,9-tetramethyl-5 decyne-4,7-diol containing 2-butoxyethanol, 2,4,7,9-tetramethyl-5 decyne-4,7-diol containing ethylene glycol, or a mixture comprised of 2,4,7,9-tetramethyl-5 decyne-4,7-diol, ethanediol, and alkyarylalkoxylates;
• (ii) preparing a pigment mixture comprised of said pigment dispersion, water and a water soluble cationic surfactant;
• (iii) shearing said pigment mixture with a latex or emulsion blend comprised of thermoplastic resin, a anionic surfactant and a nonionic surfactant;
• (iv) heating the above sheared blend of (iii) below the glass transition temperature (Tg) of the resin to form electrostatically bound toner size aggregates;
• (v) adding further anionic surfactant to stabilize the toner size aggregates, and retain the particle size and GSD upon further heating;
• and
• (vi) heating said toner sized bound aggregates above the Tg of the resin, cooling, and washing to enable removal of said surfactants.

A process for the preparation of a combination of color toners comprised of a cyan toner, a magenta toner, a yellow toner, and a black toner, each of said toners being comprised of resin and pigment, and wherein the pigment is cyan, magenta, yellow and black, each of said pigments are dispersed in a neutral charge water soluble surfactant, which surfactant is readily removable with water washing, and wherein each toner in the combination is prepared by

• (i) preparing a pigment dispersion, which dispersion is comprised of a pigment and a surfynol water soluble nonionic surfactant;
• (ii) shearing said pigment dispersion with a latex or emulsion blend comprised of resin, a counterionic surfactant with a charge polarity of opposite sign to that of said ionic surfactant and a nonionic surfactant;
• (iii) heating the above sheared blend below about the glass transition temperature (Tg) of the resin to form electrostatically bound toner size aggregates with a narrow particle size distribution;
• and
• (iv) heating said bound aggregates above about the Tg of the resin, and optionally washing and drying.

A process for the preparation of a combination of four colored toners for the development of electrostatic latent images enabling the formation of a full color gamut image, and wherein the four toners are comprised of a first cyan toner, a second magenta toner, a third yellow toner, and a fourth black toner, each of said toners being comprised of resin and pigment, and wherein the pigment is cyan, magenta, yellow and black, and wherein each toner in the combination is prepared by

• (i) providing a pigment dispersion, which dispersion is comprised of a pigment, and the nonionic water soluble surfactant mixture comprised of 2,4,7,9-tetramethyl-5 decyne-4,7-diol, ethanediol, and alkyarylalkoxylates;
• (ii) preparing a pigment mixture comprised of said pigment dispersion, water and a water soluble cationic surfactant;
• (iii) shearing said pigment mixture with a latex or emulsion blend comprised of thermoplastic resin, an anionic surfactant and a nonionic surfactant;
• (iv) heating the above sheared blend of (iii) below the glass transition temperature (Tg) of the resin to form electrostatically bound toner size aggregates with a narrow particle size distribution;
• (v) adding further anionic surfactant to stabilize the toner size aggregates, and retain the particle size and GSD upon further heating;
• and
• (vi) heating said toner sized bound aggregates above the Tg of the resin, and optionally cooling, and washing to enable removal of said surfactants.