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Particles for Electrophoretic Displays

A particle and electrophoretic fluid technology, applied in the direction of instruments, transportation and packaging, optics, etc., to achieve the effect of good mobility and good bistability

Active Publication Date: 2018-10-30
E INK CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No solvent transfer or drying required

Method used

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  • Particles for Electrophoretic Displays
  • Particles for Electrophoretic Displays
  • Particles for Electrophoretic Displays

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] Example 1: (E)-4,4'-(4-((2,6-dicyano-4-nitrophenyl)diazenyl)-2-methoxy-5-(3,5,5- Trimethylcaproylamido)phenylazanediyl)bis(butan-4,1-diyl)diacrylate

[0101] (Dye 3)

[0102]

[0103] Step 1: 4,4'-(5-acetamido-2-methoxyphenylazanediyl)bis(butan-4,1-diyl)diacetate

[0104] 3'-amino-4'-methoxyacetanilide (18.0g, 0.1mol), 4-bromobutyl acetate (48.8g, 0.25mol), 1-methyl-2-pyrrolidone (50ml) and bicarbonate A stirred mixture of sodium (55.2g, 0.66mol) was heated in an oil bath at 105°C overnight, allowed to cool and then poured into water (500ml). After stirring for 30 minutes, the separated oil was extracted with dichloromethane (150ml), the organic layer was dried (MgSO 4 ) and evaporated to give a thick brown oil (57.0 g). The oil (95% purity) was used without further purification.

[0105] Step 2: 4,4'-(5-Amino-2-methoxyphenylazanediyl)dibutan-1-ol

[0106] Crude 4,4'-(5-acetamido-2-methoxyphenylazanediyl)bis(butan-4,1-diyl)diacetate (0.1 mol) was dissolved in...

Embodiment 2

[0117] Example 2: Preparation of Cyan Polymer Particles Using Mono-Encapped PDMS Methacrylate Stabilizer

[0118] Monomethacrylate terminated polydimethylsiloxane of mw. 10,000 (1.70 g) was dissolved in dodecane (42 g) in a 100 ml three necked round bottom flask. Methyl methacrylate (5.4ml), cyan dye (Dye 3) (0.25g) and octyl thiol (0.13ml) were added. The flask was heated to 80 °C under nitrogen with stirring at 300 rpm. AIBN (0.11 g) was added. The mixture was stirred for 2 hours, and then cooled to room temperature and the contents were filtered through a 50 micron cloth. The cyan dispersion was cleaned by centrifugation and the supernatant was replaced with clean dodecane. The average particle size is 449 nm.

Embodiment 3

[0119] Example 3: Preparation of Magenta Polymer Particles Using Mono-Encapped PDMS Methacrylate Stabilizer

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Abstract

The present invention relates to colored polymers, methods for their preparation, electrophoretic fluids comprising such particles and electrophoretic display devices comprising such fluids.

Description

technical field [0001] The present invention relates to colored polymer particles, methods for their preparation, electrophoretic fluids comprising such particles, electrophoretic display devices comprising such fluids, and the use of said particles in optical, electro-optical, electronic, electrochemical, electrophotography, electrowetting and electrophoretic displays and / or devices for use in security, cosmetic, decorative or diagnostic applications. Background technique [0002] EPDs (Electrophoretic Displays) and their use for electronic paper have been known for many years. EPDs generally comprise charged electrophoretic particles dispersed between two substrates, each comprising one or more electrodes. The space between the electrodes is filled with a dispersion medium having a color different from that of the particles. If a voltage is applied between the electrodes, the charged particles move to the electrode of opposite polarity. The particles may cover the elect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/12C08F220/14C08F222/24C08F222/22C08F220/06C09B69/10G02F1/167
CPCC08F220/14G02F1/167G02F2001/1678C08F230/08C08F222/1025C09B69/106Y10T428/2982C08F220/18G02F2202/022G02F2202/04G02F2202/36C08F222/1035
Inventor 路易斯·迪亚娜·法兰德尼尔斯·格赖纳特克莱尔·托平乔纳森·亨利·威尔逊西蒙·比格斯奥利维尔·凯尔西蒙·劳森亚历山德拉·里谢西蒙·斯图尔特-科尔
Owner E INK CORPORATION
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