WO2009100803A2 - Composition fluide pour affichage électrophorétique couleur - Google Patents

Composition fluide pour affichage électrophorétique couleur Download PDF

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Publication number
WO2009100803A2
WO2009100803A2 PCT/EP2009/000289 EP2009000289W WO2009100803A2 WO 2009100803 A2 WO2009100803 A2 WO 2009100803A2 EP 2009000289 W EP2009000289 W EP 2009000289W WO 2009100803 A2 WO2009100803 A2 WO 2009100803A2
Authority
WO
WIPO (PCT)
Prior art keywords
polymer particles
particles
process according
electrophoretic
coloured
Prior art date
Application number
PCT/EP2009/000289
Other languages
English (en)
Other versions
WO2009100803A3 (fr
Inventor
Mark John Goulding
Ashley Nathan Smith
Johannes Canisius
Richard Vidal
Sihame Khoukh
Matthias Koch
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 WO2009100803A2 publication Critical patent/WO2009100803A2/fr
Publication of WO2009100803A3 publication Critical patent/WO2009100803A3/fr

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 velocity of a particle in a unit electric field is known as the electrophoretic mobility, and can be calculated using the Henry equation: where ⁇ is the dielectric constant of the dispersion medium, ⁇ is dynamic viscosity of the dispersion medium (Pa s), and ⁇ is zeta potential (i.e., the electrokinetic potential of the slipping plane in the double layer).
  • f(Ka) is 'Henrys function' and is related to the ratio of particle radius to double layer thickness.
  • electrophoretic displays typically comprise a front plane visual element made from a film comprising a layer of microcapsules about 50 ⁇ m in diameter bound with an isotropic polymer matrix to an electrically conducting Indium Tin Oxide (ITO) coated transparent plastic substrate.
  • ITO Indium Tin Oxide
  • a fluid composition comprising an organic dielectric fluid and black and white nanoparticles, typically made from surface modified Titanium dioxide. The individual particles are typically
  • Subtractive colour techniques have also been used for the production of full- colour electro-optical display media. This involves the superposition of one coloured layer over another, as commonly employed in printed media. Examples of this are found in both liquid crystal displays and electrophoretic displays (WO2004051353 (A1 ).
  • 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.
  • It also relates specifically to dispersions of the aforementioned polymer nanoparticles in dielectric organic media, which enable electrophoretic switching of the particles in an applied electric field.
  • the coloured polymer particles according to the invention provide electrophoretic fluids showing response times which meet the usual requirements for such fluids of ⁇ 10 sec, preferably ⁇ 5 sec, especially ⁇ 2 sec.
  • response times ⁇ 1 sec are possible.
  • the basic steps to provide electrophoretic fluids according to the present invention are: - preparing, preferably colourless, resin particles by emulsion polymerisation, comprising sites of charging and optionally of stabilization,
  • a surfactant-free emulsion copolymerisation using batch process is preferred.
  • Protective colloids (water-soluble polymers) and surfactants are usually key formulation variables in emulsion polymerisation because of their impact on the intraparticle stability and particle size control but they may have a detrimental effect on the electrophoretic response.
  • the polymerization according to the invention is a free radical polymerization.
  • 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 amounts in which the dyes are mixed with the polymeric nanoparticles can vary within wide limits depending on their solubility in the solvent and the desired depth of shade; in general, amounts from 1 to 30 % by weight, preferably 2 to 20 % by weight, based on the material to be coloured, have proved to be advantageous. Especially preferred are amounts in a range from 4% to 15% by weight, preferably from 6% to 12% by weight.
  • Preferred solvents that may be used are for example butanone, cyclohexanone, toluene, xylene, methylene chloride, ethylene chloride, dioxane, or acetone.
  • the dyeing process is preferably carried out by mixing the polymer particles and the dye in a solvent and stirring the mixture at a predetermined temperature for 0.5 - 4 hours, preferably 1 - 3 hours.
  • a preferred stirring speed of 30 - 300 rpm may be used.
  • the stirring speed is preferably 30 - 50 rpm, for water non-miscible solvent it is 50 - 200 rpm.
  • the solvent is then removed by distillation under vacuum and the particles are optionally washed and dried by common techniques, preferably by freeze drying. This process gives dyed nanoparticles without altering their initial size and morphology.
  • the electrophoretic particles according to the present invention are suitable for all known electrophoretic media and electrophoretic displays, e.g.
  • flexible displays one particle systems, two particle systems, dyed fluids, systems comprising microcapsules, microcup systems, air gap systems and others as described in C. M. Lampert, Displays; 2004, 25(5) published by Elsevier B. V., Amsterdam.
  • Examples of flexible displays are dynamic keypads, e- paper watches, dynamic pricing and advertising, e-readers, reliable displays, smart card media, product packaging, mobile phones, lab tops, display card, digital signage.
  • the coloured particles according to the invention are used in combination with white particles.
  • the claims disclose further preferred combinations of the subject-matters according to the invention.
  • AIBA azobis(isobutylamidine) hydrochloride
  • the nanoparticles are purified by centrifugation in deionised water.
  • Example 3c organol red distributed by Europhtal France (chemical category : p. Phenylazoaniline)
  • Example 3e macrolex red violet from Bayer (chemical category: anthraquinone)
  • Example 3f solvent yellow 16 (colour index 12700) distributed by Europhtal France
  • Particle size distribution is measured by light scattering Malvern instrument and by transmission electron microscopy (TEM). The diameters of the monodisperse polymeric nanoparticles are found out in a 300-400 nm range.
  • 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.
  • Example 5 Formulation of Electrophoretic display fluid, containing coloured polymer nanoparticles.
  • Dispersants OLOA 11 K(Chevron Oronite) , Solsperse 17K(Lubrizol Ltd), and affinity surfactant Sorbitan trioleate Span 85(Sigma Aldrich) are included in some formulations to improve dispersion stability and charge. All formulations are weighed as described below, then sonicated for a minimum of 1 hour to facilitate dispersion of the particles.
  • red polymer nanoparticles + a dyed solvent 0.010 g of Oil Blue N (Sigma-Aldrich) is dissolved into a solvent mixture containing 8.343 g of Halocarbon oil 0.8 and 1.471 g lsopar G. 0.634 g of this mixture is then combined with 0.045 g of red polymer nanoparticles, 0.010 g of OLOA11 K, and 0.002 g of Span 85.
  • red polymer nanoparticles + oppositely charged contrast particle 0.193 g of red polymer nanoparticles is dispersed into 1.789 g of lsopar G, 2.186 g of Halocarbon oil 0.8, 0.002 g of Span 85 and 0.004 g of Solsperse 17K.
  • 0.066 g of a white contrast particle 100 nm diameter styrene - divinyl benzene polymer nanoparticle, synthesised via miniemulsion polymerisation; with a measured zeta potential of -9 mV
  • CIE 1931 xyY coordinates are disclosed in Table I.
  • Example 7 Electro-optical measurement of Electrophoretic display fluid, containing inventive polymer nanoparticles.
  • All measurements are carried out on a DMS-301 display measurement system, using formulations similar to those described in example 6, filled into 100 micron glass cells.
  • the cells consist of two ITO coated plates of glass separated to 100 micron distance. The movement of the particles from one ITO electrode to the other yields a difference in luminance which is measured by the DMS-301 as shown.
  • the coloured polymer nanoparticles compare favourably with the state of the art.
  • the dual particle systems show significantly higher voltage switching because of the unoptimised white contrast particle used. This is demonstrated by the high values obtained when the white particles are measured in a dye, in comparison to the particles of this invention.

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  • 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.
PCT/EP2009/000289 2008-02-11 2009-01-19 Composition fluide pour affichage électrophorétique couleur WO2009100803A2 (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 (2)

Application Number Priority Date Filing Date Title
EP08002487 2008-02-11
EP08002487.0 2008-02-11

Publications (2)

Publication Number Publication Date
WO2009100803A2 true WO2009100803A2 (fr) 2009-08-20
WO2009100803A3 WO2009100803A3 (fr) 2009-12-30

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PCT/EP2009/000289 WO2009100803A2 (fr) 2008-02-11 2009-01-19 Composition fluide pour affichage électrophorétique couleur

Country Status (3)

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

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110297888A1 (en) * 2009-02-09 2011-12-08 Merck Patent Gesellschaft Mit Beschrankter Haftung Coloured particles for electrophoretic displays
WO2011154104A1 (fr) 2010-06-07 2011-12-15 Merck Patent Gmbh Particules polymères réfléchissantes blanches
WO2012072218A1 (fr) 2010-11-30 2012-06-07 Merck Patent Gmbh Particule pour afficheurs et électrophorétiques
WO2012152392A1 (fr) 2011-05-09 2012-11-15 Merck Patent Gmbh Particules pour afficheurs à électrophorèse
WO2012152409A1 (fr) 2011-05-09 2012-11-15 Merck Patent Gmbh Particules polymères à base d'un mésogène réactif
WO2013026519A1 (fr) * 2011-08-24 2013-02-28 Merck Patent Gmbh Particules de polymère colorées
WO2013170938A1 (fr) 2012-05-14 2013-11-21 Merck Patent Gmbh Particules destinées à des affichages électrophorétiques
WO2013170937A1 (fr) 2012-05-14 2013-11-21 Merck Patent Gmbh Particules pour affichages électrophorétiques
WO2013189580A1 (fr) 2012-06-22 2013-12-27 Merck Patent Gmbh Fluide électrophorétique
WO2014019651A1 (fr) 2012-08-01 2014-02-06 Merck Patent Gmbh Fluides électrophorétiques
WO2014019650A1 (fr) 2012-08-01 2014-02-06 Merck Patent Gmbh Fluides électrophorétiques
WO2014166583A1 (fr) 2013-04-12 2014-10-16 Merck Patent Gmbh Particules pour écrans électrophorétiques
US8901219B2 (en) 2010-06-07 2014-12-02 Merck Patent Gmbh Coloured polymer particles
WO2014198373A1 (fr) 2013-06-12 2014-12-18 Merck Patent Gmbh Particules pour écrans électrophorétiques
WO2015120950A1 (fr) * 2014-02-13 2015-08-20 Merck Patent Gmbh Particules polymères à base d'un mésogène réactif
US9298058B2 (en) 2012-01-24 2016-03-29 Hewlett Packard Development Company, L.P. Multi-stable electronic inks
US9588357B2 (en) 2012-05-14 2017-03-07 Merck Patent Gmbh Particles for electrophoretic displays
US9977309B2 (en) 2013-12-19 2018-05-22 Merck Patent Gmbh Electrophoretic fluid
US10007166B2 (en) 2013-08-30 2018-06-26 Hewlett-Packard Development Company, L.P. Electronic inks
US10126625B2 (en) 2012-04-04 2018-11-13 Merck Patent Gmbh Particles for electrophoretic displays comprising a core and a random-copolymer coating
US10233308B2 (en) 2013-08-30 2019-03-19 Sun Chemical Corporation Colored fluids for display devices
US10308744B2 (en) 2013-06-12 2019-06-04 Merck Patent Gmbh Particles for electrophoretic displays
US10483532B2 (en) 2012-08-07 2019-11-19 Cornell University Binder-free and carbon-free nanoparticle containing component, methods and applications

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1088833A1 (fr) * 1999-09-30 2001-04-04 Xerox Corporation Procédé de polymérisation en émulsion sans tensioactif
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
JP2005029766A (ja) * 2003-07-11 2005-02-03 Soken Chem & Eng Co Ltd 機能性アクリル系ポリマー定形粒子及びその用途
WO2006093179A1 (fr) * 2005-03-01 2006-09-08 Soken Chemical & Engineering Co., Ltd. Particules poreuses monodispersées et procédé pour la production de celles-ci et utilisation de celles-ci
US20070200795A1 (en) * 2001-05-15 2007-08-30 E Ink Corporation Electrophoretic media and processes for the production thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1088833A1 (fr) * 1999-09-30 2001-04-04 Xerox Corporation Procédé de polymérisation en émulsion sans tensioactif
US20070200795A1 (en) * 2001-05-15 2007-08-30 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
JP2005029766A (ja) * 2003-07-11 2005-02-03 Soken Chem & Eng Co Ltd 機能性アクリル系ポリマー定形粒子及びその用途
WO2006093179A1 (fr) * 2005-03-01 2006-09-08 Soken Chemical & Engineering Co., Ltd. Particules poreuses monodispersées et procédé pour la production de celles-ci et utilisation de celles-ci

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110297888A1 (en) * 2009-02-09 2011-12-08 Merck Patent Gesellschaft Mit Beschrankter Haftung Coloured particles for electrophoretic displays
US8743451B2 (en) * 2009-02-09 2014-06-03 Merck Patent Gmbh Coloured particles for electrophoretic displays
WO2011154104A1 (fr) 2010-06-07 2011-12-15 Merck Patent Gmbh Particules polymères réfléchissantes blanches
US8906998B2 (en) 2010-06-07 2014-12-09 Merck Patent Gmbh White reflective polymer particles
US8901219B2 (en) 2010-06-07 2014-12-02 Merck Patent Gmbh Coloured polymer particles
KR101928588B1 (ko) 2010-11-30 2018-12-12 메르크 파텐트 게엠베하 전기영동 디스플레이용 입자
US9182615B2 (en) 2010-11-30 2015-11-10 Merck Patent Gmbh Particles for electrophoretic displays
US20130244035A1 (en) * 2010-11-30 2013-09-19 The University Of Bristol Particles for electrophoretic displays
WO2012072218A1 (fr) 2010-11-30 2012-06-07 Merck Patent Gmbh Particule pour afficheurs et électrophorétiques
WO2012152392A1 (fr) 2011-05-09 2012-11-15 Merck Patent Gmbh Particules pour afficheurs à électrophorèse
US9109160B2 (en) 2011-05-09 2015-08-18 Merck Patent Gmbh Reactive mesogen based polymer particles
CN103547655B (zh) * 2011-05-09 2015-06-03 默克专利有限公司 基于反应性介晶的聚合物粒子
CN103547655A (zh) * 2011-05-09 2014-01-29 默克专利有限公司 基于反应性介晶的聚合物粒子
US9598587B2 (en) 2011-05-09 2017-03-21 Merck Patent Gmbh Reactive mesogen based polymer particles
WO2012152409A1 (fr) 2011-05-09 2012-11-15 Merck Patent Gmbh Particules polymères à base d'un mésogène réactif
JP2014519534A (ja) * 2011-05-09 2014-08-14 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
WO2013026519A1 (fr) * 2011-08-24 2013-02-28 Merck Patent Gmbh Particules de polymère colorées
US9151871B2 (en) 2011-08-24 2015-10-06 Merck Patent Gmbh Coloured polymer particles
US9298058B2 (en) 2012-01-24 2016-03-29 Hewlett Packard Development Company, L.P. Multi-stable electronic inks
US10126625B2 (en) 2012-04-04 2018-11-13 Merck Patent Gmbh Particles for electrophoretic displays comprising a core and a random-copolymer coating
WO2013170937A1 (fr) 2012-05-14 2013-11-21 Merck Patent Gmbh Particules pour affichages électrophorétiques
US9651846B2 (en) 2012-05-14 2017-05-16 Merck Patent Gmbh Particles for electrophoretic displays
WO2013170938A1 (fr) 2012-05-14 2013-11-21 Merck Patent Gmbh Particules destinées à des affichages électrophorétiques
US9645416B2 (en) 2012-05-14 2017-05-09 Merck Patent Gmbh Particles for electrophoretic displays
US9588357B2 (en) 2012-05-14 2017-03-07 Merck Patent Gmbh Particles for electrophoretic displays
US10048562B2 (en) 2012-06-22 2018-08-14 Merck Patent Gmbh Electrophoretic fluid
WO2013189580A1 (fr) 2012-06-22 2013-12-27 Merck Patent Gmbh Fluide électrophorétique
WO2014019651A1 (fr) 2012-08-01 2014-02-06 Merck Patent Gmbh Fluides électrophorétiques
US10353265B2 (en) 2012-08-01 2019-07-16 Merck Patent Gmbh Electrophoretic fluids
WO2014019650A1 (fr) 2012-08-01 2014-02-06 Merck Patent Gmbh Fluides électrophorétiques
US10007165B2 (en) 2012-08-01 2018-06-26 Merck Patent Gmbh Electrophoretic fluids
US10483532B2 (en) 2012-08-07 2019-11-19 Cornell University Binder-free and carbon-free nanoparticle containing component, methods and applications
WO2014166583A1 (fr) 2013-04-12 2014-10-16 Merck Patent Gmbh Particules pour écrans électrophorétiques
US9908963B2 (en) 2013-04-12 2018-03-06 Mereck Patent Gmbh Particles for electrophoretic displays
US10308744B2 (en) 2013-06-12 2019-06-04 Merck Patent Gmbh Particles for electrophoretic displays
WO2014198373A1 (fr) 2013-06-12 2014-12-18 Merck Patent Gmbh Particules pour écrans électrophorétiques
US10106686B2 (en) 2013-06-12 2018-10-23 Merck Patent Gmbh Particles for electrophoretic displays
US10233308B2 (en) 2013-08-30 2019-03-19 Sun Chemical Corporation Colored fluids for display devices
US10007166B2 (en) 2013-08-30 2018-06-26 Hewlett-Packard Development Company, L.P. Electronic inks
US9977309B2 (en) 2013-12-19 2018-05-22 Merck Patent Gmbh Electrophoretic fluid
CN105980526B (zh) * 2014-02-13 2018-11-23 默克专利股份有限公司 基于反应性介晶的聚合物颗粒
CN105980526A (zh) * 2014-02-13 2016-09-28 默克专利股份有限公司 基于反应性介晶的聚合物颗粒
US9796926B2 (en) 2014-02-13 2017-10-24 Merck Patent Gmbh Reactive mesogen based polymer particles
WO2015120950A1 (fr) * 2014-02-13 2015-08-20 Merck Patent Gmbh Particules polymères à base d'un mésogène réactif

Also Published As

Publication number Publication date
TW200951146A (en) 2009-12-16
EP2240518A2 (fr) 2010-10-20
WO2009100803A3 (fr) 2009-12-30

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