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Method for preparing electrophoretic particles, electrophoretic particles, electrophoretic dispersion, electrophoretic sheet, electrophoretic apparatus, and electronic device

An electrophoretic particle and manufacturing method technology, applied in optics, instruments, nonlinear optics, etc., can solve problems such as AMP particle agglutination

Inactive Publication Date: 2015-11-25
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, if the hydroxyl groups are exposed from the surface of the shell, the hydroxyl groups may form hydrogen bonds with each other, so the AMP particles may aggregate together.

Method used

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  • Method for preparing electrophoretic particles, electrophoretic particles, electrophoretic dispersion, electrophoretic sheet, electrophoretic apparatus, and electronic device
  • Method for preparing electrophoretic particles, electrophoretic particles, electrophoretic dispersion, electrophoretic sheet, electrophoretic apparatus, and electronic device
  • Method for preparing electrophoretic particles, electrophoretic particles, electrophoretic dispersion, electrophoretic sheet, electrophoretic apparatus, and electronic device

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no. 1 Embodiment approach

[0145] A first embodiment of the method for producing an electrophoretic particle of the present invention will be described.

[0146] First, before describing the method of manufacturing the electrophoretic particle of the present embodiment, the electrophoretic particle (electrophoretic particle of the present embodiment) manufactured by applying the method of manufacturing the electrophoretic particle of the present embodiment will be described.

[0147] The electrophoretic particle produced by using the method for producing an electrophoretic particle according to this embodiment has the particle and a coating layer covering at least a part of the particle. The particle includes a mother particle and a shell made of an organic polymer and enclosing the mother particle in a cellular form. In addition, the coating layer has a polymer obtained by polymerizing a monomer from a polymerization initiating group as an origin. An electrophoretic particle having such a configuratio...

no. 2 Embodiment approach

[0402] Next, a second embodiment of the method for producing electrophoretic particles of the present invention will be described.

[0403] First, before describing the method of manufacturing the electrophoretic particle of the present embodiment, the electrophoretic particle (electrophoretic particle of the present embodiment) manufactured by applying the method of manufacturing the electrophoretic particle of the present embodiment will be described.

[0404] The electrophoretic particle produced by applying the method for producing an electrophoretic particle according to this embodiment has the particle and a coating layer covering at least a part of the particle, similarly to the electrophoretic particle 1 of the first embodiment described above. The particle includes a mother particle and a shell made of an organic polymer and enclosing the mother particle in a cellular form. In addition, the covering layer contains a compound (second compound) having a functional group r...

Embodiment 1

[0649] [1] First, carbon black particles with an average particle diameter of 0.1 μm (master particle: manufactured by Asahi Carbon Co., Ltd., “Asahi Salmal”) were dispersed in water (aqueous dispersion liquid) to obtain a dispersion liquid. In addition, the surface of carbon black particles is negatively charged.

[0650] [2] Next, a cationic polymerizable surfactant (first polymerizable surfactant: DMC) is added to the dispersion liquid. Then, the dispersion liquid was stirred while being irradiated with ultrasonic waves to obtain a mixed liquid.

[0651][3] Next, in this mixed solution, a polymerizable surfactant having a hydroxyl group (the second polymerizable surfactant: ADEKA product, Adecaria software ER-10) is mixed with a cationic polymerizable surfactant Add in equimolar amounts. Then, this liquid mixture was stirred while irradiating ultrasonic waves to obtain an emulsion.

[0652] [4] Next, sodium persulfate (polymerization initiator) was added to the emulsion ...

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Abstract

A method for preparing electrophoretic particles includes mixing a first compound (a compound provided with a functional group having reactivity with a hydroxyl group) or a second compound (a compound provided with a functional group having reactivity with a hydroxyl group and a polymer), and a plurality of particles to obtain a mixture, and linking the first compound or the second compound to the surface of the particles. When obtaining the mixture, the content of the first compound or the second compound in the mixture is 75% by weight or more.

Description

technical field [0001] The present invention relates to a method for producing electrophoretic particles, electrophoretic particles, electrophoretic dispersion liquid, electrophoretic sheet, electrophoretic device and electronic equipment. Background technique [0002] In general, it is known that when an electric field is applied to a dispersion system in which fine particles are dispersed in a liquid, the fine particles move (swim) in the liquid due to Coulomb force. This phenomenon is called electrophoresis, and in recent years, an electrophoretic display device that displays desired information (image) using this electrophoresis has attracted attention as a new display device. [0003] This electrophoretic display device is characterized in that it has display memorization properties in a state where voltage application is stopped, wide viewing angle, high contrast display with low power consumption, and the like. [0004] In addition, the electrophoretic display device...

Claims

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Application Information

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IPC IPC(8): G02F1/167
CPCG02F1/167G02F2001/1678C08F130/08
Inventor 下神耕造小松晴信横川忍
Owner SEIKO EPSON CORP
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