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Patent Searching and Data


Title:
LIQUID DEVELOPER AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2019/065796
Kind Code:
A1
Abstract:
Provided is a liquid developer the volume resistivity of which is high, the grain size of toner particles in which is small, and which excels in dispersion stability of the toner particles. A liquid developer containing a carrier liquid the SP value of which is 8.20 or smaller, toner particles insoluble in the carrier liquid and a toner particle dispersant, the liquid developer characterized in that the toner particles contain polyester resin having an acid value of 5-50 mg KOH/g inclusive, the number-average molecular weight of the polyester resin is 3,500-20,000 inclusive, and the toner particle dispersant is a polymer having a primary amino group, the amine value of the polymer having the primary amino group being 30-200 mg KOH/g inclusive, the ratio of the total number of acid groups of the polyester resin to the total number of amino groups of the polymer having the primary amino group being 1.0-10.0 inclusive.

Inventors:
HASEGAWA, Waka (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, 〒1468501, JP)
NATORI, Ryo (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, 〒1468501, JP)
MASHIDA, Ayano (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, 〒1468501, JP)
ITO, Junji (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, 〒1468501, JP)
AICHI, Yasuhiro (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, 〒1468501, JP)
SHIRAKAWA, Jun (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, 〒1468501, JP)
Application Number:
JP2018/035833
Publication Date:
April 04, 2019
Filing Date:
September 27, 2018
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; G03G9/12; G03G9/125; G03G9/135
Domestic Patent References:
WO2018097169A12018-05-31
Foreign References:
JP2016224098A2016-12-28
JP2008186002A2008-08-14
JP2014038234A2014-02-27
JP2017016101A2017-01-19
JP2016224103A2016-12-28
JP2016224405A2016-12-28
JP2017134137A2017-08-03
Attorney, Agent or Firm:
NIWA, Takeshi et al. (Acropolis 21 Bldg. 8th Floor, 4-10 Higashi Nihonbashi 3-chome, Chuo-k, Tokyo 04, 〒1030004, JP)
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