Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making developer composition
Reexamination Certificate
2006-10-11
2010-10-12
RoDee, Christopher (Department: 1795)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Process of making developer composition
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).
Ishikawa Yoshinobu
Kamiyoshi Nobumichi
Sata Shin-ichi
KAO Corporation
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
RoDee Christopher
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