Title:
METHOD FOR PRODUCING LIQUID DEVELOPER
Document Type and Number:
WIPO Patent Application WO/2020/261717
Kind Code:
A1
Abstract:
This method for producing a liquid developer containing a binder resin, a colorant, and an insulating liquid comprises Step I and Step II, wherein: the binder resin contains a polyester resin A having an alcohol component-derived constituent unit, and a carboxylic acid component-derived constituent unit containing an acid-modified product A of an α-olefin polymer having 3-18 carbon atoms; Step I is a step for stirring raw materials containing a binder resin and a colorant, or raw materials containing a part of a binder resin, a colorant, and an insulating liquid at a temperature higher than or equal to the glass transition temperature of the binder resin; and Step II is a step for performing phase inversion emulsification by adding dropwise, to the stirred product of Step I, the insulating liquid in an amount such that the total amount used in Step I and Step II is 50-500 parts by mass with respect to 100 parts by mass of the total amount of the binder resin and the colorant, at a temperature higher than or equal to the glass transition temperature of the binder resin to thereby obtain a dispersion of toner particles. The liquid developer obtained by the method of the present invention is suitably used to develop a latent image formed by an electrophotographic method, an electrostatic recording method, an electrostatic printing method, or the like.
Inventors:
OKAUCHI NOBUAKI
MITSUJI AKITAKA
MITSUJI AKITAKA
Application Number:
PCT/JP2020/016426
Publication Date:
December 30, 2020
Filing Date:
April 14, 2020
Export Citation:
Assignee:
KAO CORP (JP)
International Classes:
G03G9/12; G03G9/13
Domestic Patent References:
| WO2019230481A1 | 2019-12-05 | |||
| WO2019131780A1 | 2019-07-04 | |||
| WO2009041634A1 | 2009-04-02 |
Foreign References:
| JP2019101113A | 2019-06-24 | |||
| JPH09179354A | 1997-07-11 | |||
| JP2006251253A | 2006-09-21 | |||
| JP2018106145A | 2018-07-05 |
Attorney, Agent or Firm:
HOSODA, Yoshinori et al. (JP)
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