Title:
複合粒子およびその製造方法
Document Type and Number:
Japanese Patent JP7155273
Kind Code:
B2
Abstract:
A composite particle is provided that includes a base particle and a plurality of hydrophilic oligomeric groups extending from an exterior portion of the base particle, the base particle including a cross-linked polyurea and at least one of a pigment and a dye. The cross-linked polyurea may form a network throughout the base particle. A method of making the composite particle includes providing either a solution containing a dye or a dispersion containing a pigment in a water-dispersible polyfunctional isocyanate dissolved in a water-miscible solvent, forming an emulsion of the solution/dispersion in water, agitating the emulsion while the polyfunctional isocyanate is converted into a cross-linked polyurea, and separating the composite particle containing the cross-linked polyurea and the dye/pigment from the emulsion.
Inventors:
Telfer, Stephen Jay.
Herbs, Craig A.
Jezek, Lee
Herbs, Craig A.
Jezek, Lee
Application Number:
JP2020545151A
Publication Date:
October 18, 2022
Filing Date:
April 05, 2018
Export Citation:
Assignee:
E Ink Corporation
International Classes:
G02F1/167; C08J3/16
Domestic Patent References:
| JP2006018236A | ||||
| JP2017512222A | ||||
| JP2003117434A | ||||
| JP2004219829A |
Foreign References:
| US20170022379 | ||||
| US20080257212 | ||||
| CN1654117A |
Attorney, Agent or Firm:
Shusaku Yamamoto
Morishita Natsuki
Morishita Natsuki