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Browse Prior Art Database

PROCESSES FOR THE PREPARATION OF TONER COMPOSITIONS

IP.com Disclosure Number: IPCOM000026009D
Original Publication Date: 1989-Aug-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 1 page(s) / 71K

Publishing Venue

Xerox Disclosure Journal

Abstract

Toner compositions obtained by a process which comprises forming an organic phase comprised of polymer and solvent, such as toluene, xylene, or halogenated components including trichloroethylene, forming an aqueous phase comprised of water and pigment, and flushing the pigment into the organic phase followed by dilution. In another embodiment, the toner is obtained by a process which comprises forming an organic phase by the mixing of a polymer and a solvent, forming an aqueous phase cake by mixing water and pigment, such as magnetite or carbon black, flushing the pigment into the polymer present in the organic phase, removing the water and solvent whereby the pigment is permanently associated with the polymer, diluting the aforementioned formed toner comprised of polymer and pi ent, crushing the

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XEROX DISCLOSURE JOURNAL

PROCESSES FOR THE PREPARATION OF TONER COMPOSITIONS U.S. C1.430/137 Roger N. Ciccarelli

Proposed Classification

Int. C1. G03g 5/00

Toner compositions obtained by a process which comprises forming an organic phase comprised of polymer and solvent, such as toluene, xylene, or halogenated components including trichloroethylene, forming an aqueous phase comprised of water and pigment, and flushing the pigment into the organic phase followed by dilution. In another embodiment, the toner is obtained by a process which comprises forming an organic phase by the mixing of a polymer and a solvent, forming an aqueous phase cake by mixing water and pigment, such as magnetite or carbon black, flushing the pigment into the polymer present in the organic phase, removing the water and solvent whereby the pigment is permanently associated with the polymer, diluting the aforementioned formed toner comprised of polymer and pi ent, crushing the

example, complete and intimate wetting of the pigment, such as magnetite, by the polymer, and effective dispersion of the pigemnt in the polymer. The toner may contain additives such as colloidal silica, metal salts of fatty acids, metal oxides, mixtures thereof, and charge enhancing additives such as distearyl dimethyl ammonium methyl sulfate, cetyl yridinium halides, or stearyl phenethyl dimethyl ammonium tosylate. Examples of polymers include polyesters, styrene acrylates, styrene methacrylates, styrene butadienes,...