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Patent Searching and Data


Title:
LIQUID DEVELOPER
Document Type and Number:
WIPO Patent Application WO/2019/177083
Kind Code:
A1
Abstract:
The present invention provides a liquid developer which exhibits excellent dispersion stability of toner particles, while being suppressed in decrease of the volume resistivity over time. A liquid developer which contains: toner particles which contain a binder resin; a carrier liquid; and a basic toner particle dispersant. This liquid developer is characterized in that: the basic toner particle dispersant is a primary amine; the binder resin has an acid value of 10 mgKOH/g or more; components having a molecular weight of 2,000 or less in the binder resin have an acid value of 5 mgKOH/g or less; and the components having a molecular weight of 2,000 or less in the binder resin have a hydroxyl value of 10 mgKOH/g or less.

Inventors:
TOKUNAGA, Yuzo (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, 〒1468501, JP)
HIRASA, Takashi (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, 〒1468501, JP)
AKASHI, Yasutaka (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, 〒1468501, JP)
NAKAJIMA, Masato (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, 〒1468501, JP)
TSUCHIDA, Naohiko (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, 〒1468501, JP)
MATSUBARA, Akifumi (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, 〒1468501, JP)
TAKENAKA, Kohji (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, 〒1468501, JP)
CHIMOTO, Yuya (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, 〒1468501, JP)
OCHI, Kouichirou (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, 〒1468501, JP)
MIYAKAI, Tomoyo (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, 〒1468501, JP)
Application Number:
JP2019/010470
Publication Date:
September 19, 2019
Filing Date:
March 14, 2019
Export Citation:
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Assignee:
CANON KABUSHIKI KAISHA (30-2, Shimomaruko 3-chome Ohta-k, Tokyo 01, 〒1468501, JP)
International Classes:
G03G9/13; G03G9/135
Domestic Patent References:
WO2018097090A12018-05-31
Foreign References:
JP2009244834A2009-10-22
JP2011158791A2011-08-18
JP2016061964A2016-04-25
JP2016080764A2016-05-16
JP2017198832A2017-11-02
JP2017223791A2017-12-21
Attorney, Agent or Firm:
IP FIRM SHUWA (Acropolis 21 Bldg. 8th Floor, 4-10 Higashi Nihonbashi 3-chome, Chuo-k, Tokyo 04, 〒1030004, JP)
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