EP2240518A2 - Composition fluide pour affichage électrophorétique couleur - Google Patents

Composition fluide pour affichage électrophorétique couleur

Info

Publication number
EP2240518A2
EP2240518A2 EP09710976A EP09710976A EP2240518A2 EP 2240518 A2 EP2240518 A2 EP 2240518A2 EP 09710976 A EP09710976 A EP 09710976A EP 09710976 A EP09710976 A EP 09710976A EP 2240518 A2 EP2240518 A2 EP 2240518A2
Authority
EP
European Patent Office
Prior art keywords
polymer particles
particles
process according
electrophoretic
coloured
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09710976A
Other languages
German (de)
English (en)
Inventor
Mark John Goulding
Ashley Nathan Smith
Johannes Canisius
Richard Vidal
Sihame Khoukh
Matthias Koch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merck Patent GmbH
Original Assignee
Merck Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Merck Patent GmbH filed Critical Merck Patent GmbH
Priority to EP09710976A priority Critical patent/EP2240518A2/fr
Publication of EP2240518A2 publication Critical patent/EP2240518A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/12—Polymerisation in non-solvents
    • C08F2/16—Aqueous medium
    • C08F2/22—Emulsion polymerisation
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F2001/1678—Constructional details characterised by the composition or particle type

Definitions

  • the black particles typically possess a permanent negative charge and the white particles possess a permanent positive charge.
  • a conducting backplane typically with a patterned electrode structure, typically a direct drive backplane or active matrix TFT backplane, it forms an electrophoretic display element.
  • the object of this invention is to provide electro-optically active media for colour electrophoretic displays with specifically engineered properties and coloured particles for use in such media.
  • the polymerization according to the invention is a free radical polymerization.
  • esters of acrylic and/or methacrylic acid are used, especially, methyl acrylate (MA), ethyl acrylate (EA), n-butyl acrylate (BA), 2-ethylhexyl acrylate, methyl methacrylate (MMA), ethyl methacrylate (EMA), n-butyl methacrylate (BMA).
  • MA methyl acrylate
  • EA ethyl acrylate
  • BA 2-ethylhexyl acrylate
  • MMA methyl methacrylate
  • EMA ethyl methacrylate
  • BMA n-butyl methacrylate
  • styrene-based monomers such as divinylbenzene, divinylether, or compounds comprising at least two acrylic or methacrylic groups. Combination of two or more monomers may be used, too.
  • anionic monomers are monomers as described above, wherein these monomers comprise an anionic functional group, such as a carboxylate group, a sulfate group, or a phosphate group.
  • Preferred compounds are such comprising a carboxylate group.
  • Especially preferred are sodium acrylate (NaA) and sodium-2-methylpropanesulfonate (NaAMPS).
  • an oil soluble initiator is used in the surfactant-free emulsion copolymerisation in order to control size, particle morphology and to reduce the residual monomers at the end of the reaction.
  • examples are azo compounds or peroxide compounds, hydroperoxides or peracid esters.
  • azo compounds are used, especially azobis(isobutylamidine) hydrochloride (AIBA) and similar compounds.
  • the replacing of the ester groups by amino groups after aminolysis is proved by FT-IR analysis.
  • the zeta potential measurements of the polymeric nanoparticles are performed in a water solution of 10 ⁇ 3 mole/l NaCI in accordance with pH variation on Malvern Zetasizer.

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Nonlinear Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Electrochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Optics & Photonics (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Polymerisation Methods In General (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne des nanoparticules polymères colorées à fonctionnalité de surface permettant une rétention des charges, leur procédé de préparation, l'utilisation de ces particules pour la fabrication d'un dispositif électrophorétique, ainsi que des dispositifs d'affichage électrophorétique couleur comprenant lesdites particules.
EP09710976A 2008-02-11 2009-01-19 Composition fluide pour affichage électrophorétique couleur Withdrawn EP2240518A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09710976A EP2240518A2 (fr) 2008-02-11 2009-01-19 Composition fluide pour affichage électrophorétique couleur

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08002487 2008-02-11
PCT/EP2009/000289 WO2009100803A2 (fr) 2008-02-11 2009-01-19 Composition fluide pour affichage électrophorétique couleur
EP09710976A EP2240518A2 (fr) 2008-02-11 2009-01-19 Composition fluide pour affichage électrophorétique couleur

Publications (1)

Publication Number Publication Date
EP2240518A2 true EP2240518A2 (fr) 2010-10-20

Family

ID=40361761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09710976A Withdrawn EP2240518A2 (fr) 2008-02-11 2009-01-19 Composition fluide pour affichage électrophorétique couleur

Country Status (3)

Country Link
EP (1) EP2240518A2 (fr)
TW (1) TW200951146A (fr)
WO (1) WO2009100803A2 (fr)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8743451B2 (en) * 2009-02-09 2014-06-03 Merck Patent Gmbh Coloured particles for electrophoretic displays
EP2577392B1 (fr) 2010-06-07 2019-06-26 Merck Patent GmbH Particules polymères colorées
KR20130087005A (ko) 2010-06-07 2013-08-05 메르크 파텐트 게엠베하 백색 반사 중합체 입자
CN103384687A (zh) * 2010-11-30 2013-11-06 默克专利有限公司 电泳显示器用粒子
US20140084216A1 (en) 2011-05-09 2014-03-27 Merck Patent Gmbh Particles for electrophoretic displays
JP6182523B2 (ja) * 2011-05-09 2017-08-16 メルク パテント ゲーエムベーハー 反応性メソゲンに基づくポリマー粒子
EP2748242B1 (fr) 2011-08-24 2015-06-24 Merck Patent GmbH Particules de polymère colorées
US9298058B2 (en) 2012-01-24 2016-03-29 Hewlett Packard Development Company, L.P. Multi-stable electronic inks
WO2013149714A1 (fr) 2012-04-04 2013-10-10 Merck Patent Gmbh Particules pour dispositifs d'affichage électrophorétiques comprenant un cœur et un revêtement de copolymère aléatoire
US9588357B2 (en) 2012-05-14 2017-03-07 Merck Patent Gmbh Particles for electrophoretic displays
US9645416B2 (en) 2012-05-14 2017-05-09 Merck Patent Gmbh Particles for electrophoretic displays
US9651846B2 (en) 2012-05-14 2017-05-16 Merck Patent Gmbh Particles for electrophoretic displays
WO2013189580A1 (fr) 2012-06-22 2013-12-27 Merck Patent Gmbh Fluide électrophorétique
US10007165B2 (en) 2012-08-01 2018-06-26 Merck Patent Gmbh Electrophoretic fluids
WO2014019651A1 (fr) 2012-08-01 2014-02-06 Merck Patent Gmbh Fluides électrophorétiques
WO2014025743A1 (fr) 2012-08-07 2014-02-13 Cornell University Composant à base de nanoparticules sans liant et sans carbone, procédé et applications
US9908963B2 (en) 2013-04-12 2018-03-06 Mereck Patent Gmbh Particles for electrophoretic displays
WO2014198375A1 (fr) 2013-06-12 2014-12-18 Merck Patent Gmbh Particules pour écrans électrophorétiques
EP3008134B1 (fr) 2013-06-12 2024-03-06 E Ink Corporation Particules pour écrans électrophorétiques
CN105705588A (zh) 2013-08-30 2016-06-22 太阳化学公司 用于显示装置的有色流体
WO2015030798A1 (fr) 2013-08-30 2015-03-05 Hewlett-Packard Development Company, L.P. Encres électroniques
US9977309B2 (en) 2013-12-19 2018-05-22 Merck Patent Gmbh Electrophoretic fluid
EP3105302B1 (fr) 2014-02-13 2020-08-05 Merck Patent GmbH Particules polymères à base d'un mésogène réactif

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6458501B1 (en) * 1999-09-30 2002-10-01 Xerox Corporation Forming a toner using surfactant-free emulsion polymerization
US7230750B2 (en) * 2001-05-15 2007-06-12 E Ink Corporation Electrophoretic media and processes for the production thereof
JP2003277414A (ja) * 2002-03-25 2003-10-02 Soken Chem & Eng Co Ltd 帯電性着色樹脂微粒子、その用途及びその製造方法
JP4517083B2 (ja) * 2003-07-11 2010-08-04 綜研化学株式会社 機能性アクリル系ポリマー定形粒子及びその用途
US7741378B2 (en) * 2005-03-01 2010-06-22 Soken Chemical & Engineering Co., Ltd. Porous monodispersed particles and method for production thereof, and use thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009100803A2 *

Also Published As

Publication number Publication date
WO2009100803A2 (fr) 2009-08-20
TW200951146A (en) 2009-12-16
WO2009100803A3 (fr) 2009-12-30

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