Encapsulated electrostatographic toner particles and a...

Details Encapsulated electrostatographic toner particles and a... Encapsulated electrostatographic toner particles and a...

G - Physics

03

G

96/54

G03G 9/093 (2006.01)

Patent

CA 2012296

ABSTRACT OF THE DISCLOSURE Encapsulated electrostatographic toner particles and a process for making toner particles. The toner particles comprise a pressure fixable core encapsulated in a pressure rupturable shell with the outer surface of the shell being hydrophobic. Preferably, the outer surface of the shell is rendered hydrophobic by having a thermosetting resin precipitated thereon. The process for producing electrostatographic toner particles comprises preparing a core material, encapsulating a discrete portion of the core material in a shell by interfacial poly- condensation, and then treating the outer surfaces of the shells with a thermosetting resin to render them hydrophobic. This enables the particles to be formed as a free-flowing, dry powder without requiring costly spray drying.

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