Process for producing a resin emulsion and toner

Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making developer composition

Reexamination Certificate

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Details

C524S599000, C524S801000, C523S335000, C523S333000

Reexamination Certificate

active

07811739

ABSTRACT:
The present invention relates to a process for producing a resin emulsion which includes the steps of (a) dispersing a resin containing acidic group in a basic aqueous medium at a temperature lower than a softening point of the resin; (b) neutralizing a dispersion obtained in the step (a) at a temperature not lower than a glass transition point of the resin and not higher than the softening point of the resin; and (c) adding an aqueous liquid to the dispersion neutralized in the step (b) at the temperature not lower than the glass transition point of the resin and not higher than the softening point of the resin to emulsify the resin in the aqueous medium. According to the present invention, the resin emulsion suitably usable for production of a toner for electrophotography can be efficiently produced without using an organic solvent and a special apparatus.

REFERENCES:
patent: 5843614 (1998-12-01), Shinzo et al.
patent: 9-311502 (1997-12-01), None
patent: 2000347455 (2000-12-01), None
patent: 2002-351140 (2002-12-01), None
patent: 2004225028 (2004-08-01), None
English language translation of JP 2000-347455 (Dec. 2000).
English langauge translation of JP 2004-225028 (Aug. 2004).

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