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Title:
LIQUID DEVELOPER
Document Type and Number:
WIPO Patent Application WO/2019/230481
Kind Code:
A1
Abstract:
The present invention provides a liquid developer containing: toner particles containing a binder resin and a colorant; an amino-group-containing copolymer; and an insulating liquid. The binder resin contains a polyester-based resin. The amino-group-containing copolymer is a polymer of a monomer A having an amino group and a monomer B represented by formula (I): [Chemical 1] (In the formula, R1 signifies a hydrogen atom or a hydrocarbon group having 1-5 carbon atoms, and R2 signifies a hydrocarbon group having 1-22 carbon atoms, which may have a substituent). Furthermore, the liquid developer satisfies requirement 1: the amine value of the amino-group-containing copolymer is not less than 165 mgKOH/g and the electrical conductivity of the liquid developer is not greater than 5.0 × 10-9 S/m, or requirement 2: the liquid developer further contains an acid compound. The liquid developer according to the present invention is suitably used, for example, for purposes such as developing a latent image formed in electrophotography, electrostatic recording, electrostatic printing, etc.

Inventors:
YAMADA TATSUYA
KANO KUNIHIRO
Application Number:
PCT/JP2019/019942
Publication Date:
December 05, 2019
Filing Date:
May 20, 2019
Export Citation:
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Assignee:
KAO CORP (JP)
International Classes:
G03G9/135; G03G9/125; G03G9/13
Domestic Patent References:
WO2014061747A12014-04-24
WO2009041634A12009-04-02
Foreign References:
JP2017054044A2017-03-16
JP2016180927A2016-10-13
JP2012072317A2012-04-12
JP2013205622A2013-10-07
JP2001031900A2001-02-06
JP2017010011A2017-01-12
JP2015145985A2015-08-13
JP2004302436A2004-10-28
JPH11133668A1999-05-21
JPH10239903A1998-09-11
JPH0820636A1996-01-23
Attorney, Agent or Firm:
HOSODA, Yoshinori (JP)
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