WO2011001418A1 - Article cosmétique possédant une structure multicouche électrochromique - Google Patents

Article cosmétique possédant une structure multicouche électrochromique Download PDF

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Publication number
WO2011001418A1
WO2011001418A1 PCT/IB2010/053060 IB2010053060W WO2011001418A1 WO 2011001418 A1 WO2011001418 A1 WO 2011001418A1 IB 2010053060 W IB2010053060 W IB 2010053060W WO 2011001418 A1 WO2011001418 A1 WO 2011001418A1
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WO
WIPO (PCT)
Prior art keywords
electrochromic
layer
layers
mask
color
Prior art date
Application number
PCT/IB2010/053060
Other languages
English (en)
Inventor
Guillaume Kergosien
Ludovic Thevenet
Original Assignee
L'oreal
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 L'oreal filed Critical L'oreal
Publication of WO2011001418A1 publication Critical patent/WO2011001418A1/fr

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Classifications

    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45DHAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D29/00Manicuring or pedicuring implements
    • A45D29/001Self adhesive nail coating blanks
    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45DHAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D31/00Artificial nails
    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45DHAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D44/00Other cosmetic or toiletry articles, e.g. for hairdressers' rooms
    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45DHAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D44/00Other cosmetic or toiletry articles, e.g. for hairdressers' rooms
    • A45D44/12Ear, face, or lip protectors
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/02Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/0208Tissues; Wipes; Patches
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/18Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/19Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/18Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/81Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • A61K8/8105Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/18Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/81Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • A61K8/8105Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • A61K8/8111Homopolymers or copolymers of aliphatic olefines, e.g. polyethylene, polyisobutene; Compositions of derivatives of such polymers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61QSPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q3/00Manicure or pedicure preparations
    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45DHAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D29/00Manicuring or pedicuring implements
    • A45D2029/002French manicure
    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45DHAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D31/00Artificial nails
    • A45D2031/005French nails
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/40Chemical, physico-chemical or functional or structural properties of particular ingredients
    • A61K2800/42Colour properties
    • A61K2800/43Pigments; Dyes
    • A61K2800/434Luminescent, Fluorescent; Optical brighteners; Photosensitizers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/80Process related aspects concerning the preparation of the cosmetic composition or the storage or application thereof
    • A61K2800/83Electrophoresis; Electrodes; Electrolytic phenomena

Definitions

  • the present invention relates to devices for
  • Devices for application to keratinous materials and including a light-emitting layer based on an
  • electroluminescent material have been described. Such devices consume energy and may turn out to be unsuitable for the desired use, e.g. when a sober makeup is wanted.
  • FR 2 825 619 describes an adhesive "patch" for application zo a keratinous support and including a multilayer structure including an
  • WO 2008/053549 relates to a device for application to a nail and including an organic electroluminescent layer or an organic electroluminescent (light-emituing) diode (OLED) .
  • JP 2006-230436 discloses a device for application to a nail and including microcapsules
  • JP 2006-262982 discloses a device for
  • the device presents the drawbacks that are inherent in using a liquid-crystal display, in particular the fact that the image sent by ⁇ he screen is visible to a greater or lesser extent depending on the angle at which it is seen.
  • electrochromic devices having a multilayer structure are known for incorporating in glazing.
  • Those multilayer structures comprise two electrode layers with two active electrochromic layers therebetween, separated by an electrolyte layer.
  • the device including an electrochromic
  • multilayer structure comprising an optionally-homogeneous electrosensitive stack of at least:
  • the multilayer structure including at least one mask making it possible to, in particular being cut out so as to, form at least one pattern.
  • the device may be configured to be fastened on a nail, and may be applied on an optionally made-up nail, or even on a false nail .
  • An active electrochromic layer is a layer that does not emit light and that has a color that may vary under the effect of electrical excitation, since the light absorption of the layer is changed. Such a layer differs from an electroluminescent layer that emits light. An electrochromic layer is not visible in the absence of incident light, whereas an electrically-activated
  • electroluminescent layer is .
  • the variation in color of the electrochromic layer is linked to a change in the distribution of electrons within at least one compound of the layer.
  • the electrochromic effect is different from chains of molecules aligning under the effect of an electrical field, as happens with liquid crystals, and it is different from particles migrating under the effect of an electromagnetic field, as happens with microcapsules.
  • the electrode layers are preferably non porous.
  • a single electrode layer preferably does not include both anodes and cathodes .
  • the elecurolyte layer is electrically connected to the first and second active electrochromic layers, e.g. being in contact therewith, at least in part.
  • the electrolyte layer may be sandwiched between the first and second active electrochromic layers .
  • Each of the active electrochromic layers is a
  • first and second active electrochromic layers may be sandwiched between the first and second electrode layers .
  • the active electrochromic layers and/or the electrolyte layer do not have liquid crystals and do not have microcapsules encapsulating particles that are suitable for moving under the effect of an electromagnetic field.
  • the mask may optionally be colored, optionnaly be opaque, and may be continuous or discontinuous.
  • the mask may be reflective.
  • the mask may be external to the electrosensitive stack.
  • the mask may form at least one pattern having visibility that may depend on the excitation state of the electrochromic device.
  • a very fashionable nail makeup effect known as a "French manicure” consists in applying makeup, preferably of light color, only to the ends of the nails, so as to give the impression of a clean and natural result.
  • chat type of makeup effect may sometimes present the drawback of appearing coo sophisticated.
  • the electrochromic device may thus be arranged so as to create a change in color at the end of a nail, e.g. in the shape of a crescent, so as to simulate that type of makeup effect.
  • the outline of the electrosensitive stack may be crescent shaped.
  • the mask may be used to mask, in part, the electrosensitive stack, and to define a pattern that is crescent shaped.
  • the electrosensitive stack may be made in such a manner that, as a function of its electrical excitation, it cakes on a color close to that of the mask.
  • a color is said to be "close” that should be understood to mean that the distance ⁇ E between them in the 1976 CIE Lab color space is less than or equal to 1.5.
  • the visibility of the mask may depend on the electrical excitation of the electrochror ⁇ ic device.
  • the mask may be fitted on the multilayer structure before or after said structure is fastened on the nail, or it may be integrated in a support layer adjacent to an electrode layer.
  • the mask may be formed by printing, transfer, or etching, amongst other possibilities.
  • the mask may be made by ink-jet printing on a multilayer structure that is placed on the nail or that is ready to be placed on the nail.
  • the mask is printed on a
  • the mask When the mask is integrated in a support layer, the mask is laminated between two films forming the support layer, for example.
  • the mask may include a pigment or coloring, a metal layer, a polymer film, and, where appropriate, it may include microrelief for creating optical effects, for example .
  • the thickness of the mask lies in the range 1 ⁇ m to 100 ⁇ m, preferably in the range 5 ⁇ m to 30 ⁇ m.
  • the mask When the mask is not completely opaque, the mask may act as an optical filter, e.g. so as to control the light reaching the underlying layers .
  • a non-homogeneous multilayer structure e.g. so as to control the light reaching the underlying layers .
  • the electrosensitive stack may be not be
  • the electrode layers may optionally be distinct from the active electrochromic layers.
  • non-homogeneous should be understood to mean that in at least two locations of the
  • At least one of said layers may extend in non-homogeneous manner within the stack, e.g. having a composition and/or thickness that varies, with the thickness possibly varying in continuous or discrete manner, where appropriate, and possibly being zero locally.
  • the thickness of the layer may vary by at least 20%, or even by at least 50% or more.
  • the layer may be an electrolyte layer, an active electrochromic layer, or an electrode layer.
  • the non-homogeneity of the electrosensitive stack makes it possible to obtain various appearances that are advantageous in cosmetics, e.g. at least one shading or a decorative pattern, in particular graded color.
  • At least one of the active electrochromic layers may present at least two regions of different respective thicknesses, e.g. a region having a non-zero thickness e, and a region having a zero thickness . Depending on the shape of the outline of one of the regions, it: is
  • an active electrochromic layer may present two regions having thicknesses that differ by more than 20%, better by more than 50%.
  • At least one layer of the electrosensitive stack may extend with thickness that is not constant over the extent of the s ⁇ ack.
  • the thickness may vary along one dimension X or along two dimensions X and Y of the stack.
  • the thickness Is measured along a dimension Z that is locally perpendicular to X and Y.
  • the thickness of at least one layer may vary in progressive manner from one location to another of the layer.
  • the thickness may be zero in at least one
  • the layer having thickness that varies may be discontinuous.
  • the disjoint regions of the layer may optionally have different compositions, so as to produce different colors, where appropriate.
  • Each of the layers of a same type e.g. the active electrochromic layers, may present both regions having a non-zero thickness and regions having a zero thickness. Non-zero-thickness regions of the two active
  • electrochromic layers may be superposed exactly, within the electrosensitive stack, when said stack is observed from above.
  • electrochromic layers may be superposed with one or more zero-thickness regions of the electrolyte layer and/or of the electrode layers.
  • the zero- thickness regions are formed by removing material or by depositing at least one material of the electrosensitive stack in selective manner.
  • At least one of the active electrochromic layers may present thickness that varies between two locations of the layer, e.g. thickness that decreases In linear manner between the locations, which, amongst others
  • Varying thickness may be presented by only one of the active electrochromic layers, or, in a variant, both of the active
  • electrochromic layers may present thickness that varies, e.g. the thickness changing by decreasing or by
  • the two active electrochromic layers may optionally present the same thickness.
  • the thickness of the electrolyte layer may also vary, e.g. In linear manner, from one location to another of the stack, independently of whether or not the
  • thickness of the other layers of the electrosensitive stack varies.
  • an electrolyte layer of thickness that varies may be situated between two
  • homogeneous active electrochromic layers in particular each of constant thickness .
  • electrochromic layers, and the electrolyte layer may present regions of zero thickness and of non-zero
  • At least one of the electrolyte layer and of the active electrochromic layers may have a composition that is not homogeneous.
  • the electrolyte layer and/or at least one active electrochromic layer may present regions having different respective compositions.
  • at least one of the active electrochromic layers may comprise a first region comprising a first polymer, and a second region comprising a second polymer that is different from the first.
  • the polymers may be selected so as to create differences in color, for example.
  • the electrolyte layer may comprise regions having different compositions, disposed between homogeneous active electrochromic layers.
  • the electrolyte layer may comprise regions having different compositions, disposed between homogeneous active electrochromic layers.
  • the electrolyte layer may comprise regions having different compositions, disposed between homogeneous active electrochromic layers.
  • electrolyte layer comprises at least two regions that are made of different materials.
  • Regions of different compositions in a single layer of the electrosensitive stack may optionally be of the same thickness.
  • the electrochromic device may include at least one shield that is disposed between two layers of the electrosensitive stack for locally creating a change in the interaction between the layers.
  • the shield is made of polymethyl methacrylate (PMMA) or of polyethylene terephthalate (PET) .
  • the shield may extend between the electrolyte layer and an active electrochromic layer.
  • the shield may, as a function of its shape, or of a variation in its thickness, or of its composition, form at least one pattern having visibility that depends on the excitation state of the electrochromic device.
  • the shield may be made by transfer, printing, or etching, amongst other possibilities.
  • the shield may optionally be transparent. For a transparent shield, a patcern defined by the shield may appear while the device is being excited.
  • the thickness of the shield lies in the range 1 ⁇ m to 100 ⁇ m, preferably in che range 5 ⁇ m to 30 ⁇ m.
  • the device may include electrical contacts.
  • at least one of said contacts is disposed on a distal portion of the device, extending in front of the nail, e.g. on a bottom face of the device.
  • At least one of the contacts may also be disposed on an edge of the device, at its distal end.
  • At least one of che contacts may extend over a height that is greater than the thickness of an electrode layer of che electrochromic multilayer structure. This makes it easier to power via an electrical terminal against which it bears.
  • One of the contacts may be disposed on a bottom face of the device, and the other on its edge, at its distal end. This makes it easier to power the device by enabling the user to position a finger easily against electrical power-supply terminals.
  • the device may include an electrosensitive stack comprising active electrocliromic layers, electrode layers, and an electrolyte layer, and said contacts may be connected, optionally directly, to the respective electrode layers .
  • the electrochromic device may include at least one electrical circuit that is connected electrically to at least one of said contacts.
  • the electrical circuit is configured to make it possible to select an excitation level for the electrosensitive stack, and it may be a simple touch-sensitive switch and/or a potentiometer for a more complex electronic circuit, e.g. configured to change the excitation of the electrosensitive stack cyclically.
  • the above-mentioned mask may possibly form all or part of an electrical contact.
  • the optionally-homogeneous electrosensitive stack formed of at least:
  • An "optically-active" layer is a layer whose
  • the optically-active layer may be selected from: a layer including an effect pigment; a colored layer,- a luminescent layer, e.g. fluorescent or phosphorescent layer; a photochromic layer; makeup deposited on
  • the opticalIy-active layer may be situated above the electrosensitive stack.
  • the optically-active layer may be situated between two layers of the electrosensitive stack.
  • the optically-active layer may be situated beneath the electrosensitive stack.
  • the optically-active layer may be formed of a mask as defined above.
  • the optically-active layer may optionally be
  • the optically-active layer may be luminescent or photochromic, and the electrosensitive stack may, as a function of its electrical excitation, block, to a greater or lesser extent, at least one optical-excitation wavelength of the optically-active layer. Excitation of the optically-active layer may thus be controlled by means of the electrosensitive stack, thereby offering novel possibilities for combining effects.
  • the optically-active layer may extend over the entire extent of the stack, or it may be discontinuous and form at least one pattern, for example.
  • the optically-active layer may include an
  • the interference pigment and/or of the liquid crystal may depend on the excitation of the electrosensitive stack. For example, when the
  • interference pigment or the liquid crystal is situated on the electrosensitive stack or within it, the
  • the electrosensitive stack may change an observed color path and/or make the pigment or the liquid crystal visible to a greater or lesser extent by forming a background that is dark to a greater or lesser extent beneath the pigment or liquid crystal.
  • the thickness of the optically- active layer lies in the range 1 micrometer ( ⁇ m) to
  • the optically-active layer may be deposited by the user on the surface of the multilayer structure, or, where appropriate, it may be deposited by printing with a particular pattern.
  • the optically-active layer may be deposited on a removable protective layer of the
  • the optically-active layer may be makeup that is deposited on the keratinous materials, and then covered by the electrochromic multilayer structure.
  • the optically-active layer may be disposed in such a manner as to create a contrast effect with at least one region of the electrosensitive stack.
  • contrast effect should be understood to mean that the contrast between two visible regions of the device is changed as a function of the excitation of the electrochromic device. This makes it possible to make a region visible to a greater or lesser extent depending on the state of the device, or to change the color that is seen by the observer. Certain colors may appear saturated to a greater or lesser extent as a function of
  • region should be understood to mean a fraction of the structure when it is seen from above. Thus, two superposed layers do not constitute two regions In the meaning of the invention. ⁇ ' '
  • Such an optically-active layer may include an effect pigment selected, for example, from interference pigments and metal particles.
  • effect pigment is a pigment whose presence within the electrochromic multilayer structure leads to a change in the visual appearance of the structure relative to the appearance of the structure in the absence of an effect pigment, in at least one of the (excited and non- excited) states of the structure.
  • An effect pigment may in particular be selected from: interference pigments, e.g. goniochromatic pigments or pearlescent pigments such as nacres; metal particles, in particular reflective particles; liquid crystals;
  • pigments having a diffraction grating having a diffraction grating; and mixtures thereof.
  • One of the active electrochromic layers may include an effect pigment.
  • a single layer may thus form both an active electrochromic layer and an optically-active layer .
  • the optically-active layer may be situated on top of the electrosensitive stack and may, for example, outline a pattern on its surface. In this circumstance, the contrast of the pattern with its surroundings depends on the excitation state of the electrochromic multilayer structure.
  • the optically-active layer may alternatively be situated beneath the electrosensitive stack.
  • electrosensitive stack may be capable, as a function of its electrical excitation, of taking on substantially the same color as the optically-active layer. This makes it possible to change the visibility of a pattern formed by the optically-active layer, depending on the excitation state of the device.
  • the optically-active layer may be deposited on a removable protective layer of the electrochromic
  • An optically-active layer including an interference pigment or a liquid crystal
  • the optically-active layer may include an
  • the electrochromic multilayer structure being situated beneath the optically-active layer.
  • the electrochromic multilayer structure may act as a background of color or of opacity that varies, making it possible to make the optically-active layer covering it visible to a greater or lesser extent.
  • the electrochromic multilayer structure may demonstrate a dark state and respectively a light or transparent state, as a function of its
  • the optically-active layer may include a nacre, a goniochromatic pigment, or a liquid crystal, in
  • iridescent pigments particular selected from those having low visibility on a light background, e.g. iridescent pigments.
  • the optically-active layer may cover the
  • electrochromic structure entirely, or it may outline a pattern on its surface.
  • the device of the invention may include:
  • the energy source may comprise a battery, a
  • the energy source may be flexible or rigid.
  • the electrochromic structure may comprise an
  • optionally-homogeneous electrosensitive stack comprising: • electrode layers;
  • the energy source may power the electrosensitive stack permanently, e.g. for a duration that is greater than 1 hour (h) , better greater than 4 h, and possibly until it is flat.
  • power may be supplied in selective manner, e.g. by means of a switch that is controlled by the user.
  • a removable insulating tab may insulate at least one terminal from che energy source before first use.
  • the mask may be superposed, at least in part, or even entirely, on the integrated source, so as to conceal said source or form a pattern therewith.
  • the device of the invention may comprise the
  • electrochromic multilayer structure comprising the optionally-homogeneous electrosensicive stack, at least one of the electrolyte layer and of the active
  • electrochromic layers comprising at least first and second materials, in particular polymers.
  • the polymers may be selected from eiectrochromic polymers .
  • the first and second materials may be juxtaposed, and, by way of example, each may correspond to a region that shows a pattern.
  • the first and second materials may optionally be disjoint.
  • the first and second materials may be in contact electrically.
  • the first and second materials may be mixed
  • the electrochromic device may be carried by a false nail made of plastics material, e.g. false nails of the type available from numerous suppliers of manicure salons . Conventionally-used false nails present long lengths and should generally be cut before use.
  • the false nail Before depositing che electrochromic multilayer structure on such a false nail, e.g. by coating for at least some layers, the false nail may be cut, e.g. in such a manner that the difference between the length and the width of the false nail lies in the range 0.6 centimeters (cm) to 1.2 cm, preferably in the range 0.7 cm to 1.1 cm, and preferably in the range 0.8 cm to 1.0 cm.
  • the width of the false nail may lie in the range 0.7 cm to 1.3 cm, for example .
  • the device may include a peeiable protective layer, or even a plurality of peeiable layers .
  • the device may also carry a non-peelable protective layer.
  • the invention also provides a method of applying makeup to human keratinous materials, e.g. the nails, the skin, or the lips, wherein an electrochromic device made in accordance with at least one of the above-defined exemplary embodiments of the invention is applied to said materials.
  • the keratinous materials receiving the device may be made-up before the device is placed thereon.
  • Figures IA and IB are diagrams showing two examples of electrochromic multilayer structures made in accordance with certain exemplary embodiments of the invention and having an external power supply;
  • FIG. 3A and 3B are diagrams showing examples of fastening an electrochromic multilayer structure to a finger or toe nail;
  • Figure 4 shows the possibility of protecting the electrochromic multilayer structure with a protective layer
  • Figure 8 shows an example of a power-supply device for electrically exciting an electrochromic multilayer structure and/or for transmitting information thereto;
  • Figures 9A and 9B show the Figure 8 device in use
  • Figure 10 shows an example of a display unit for displaying various electrochromic multilayer structures to consumers
  • Figure 11 shows an example of a power-supply device in a variant embodiment of the invention
  • an electrochromic device 1 of the invention may include first and second active electrochromic layers 10 and 20 that are separated by an electrolyte layer 30 with which they come into contact .
  • the device 1 may also include first and second electrode layers 40 and 50 that are disposed on either side of the stack formed by the active electrochromic layers and by the electrolyte layer, and that come into contact respectively with the first and second active
  • electrochromic layers on their face remote from the electrolyte layer 30.
  • the electrode layers 40 and 50 are coatings of a transparent; electrically-conductive material, e.g. indium tin oxide (ITO), the coatings being supported by respective support layers 60 and 70, e.g. made out of a transparent, optionally-colored,
  • ITO indium tin oxide
  • Each of the support layers 60 and 70 may be constituted by a single flexible film, or, in a variant, by an assembly of a plurality of flexible films thai: have been laminated together.
  • the flexible films may advantageously present flexibility that enables them to be folded in half without breaking.
  • the support layers 60 and 70 preferably present thickness that is less than 100 ⁇ m, preferably less than 70 ⁇ m.
  • the electrochromic device may be capable of following the contours of the application zone, e.g. the finger nails or the lips.
  • the electrochromic multilayer structure may be flexible enough to adapt to the curve of the nail.
  • the thickness of the electrode layers, e.g. of the above-mentioned ITO coating may lie in the range
  • the transparent electrically- conductive material covers the support layers 60 and 70 in uniform manner, but this could be different, e.g. in order to create patterns or to enable selective
  • the device includes a mask in accordance with the invention.
  • the support layer 60 may be superposed on a mask 200, making it possible to form a pattern.
  • the mask 200 is interposed between the support layer 60 and the electrode layer, or, in a variant, it may be on top of the support layer or integrated therein.
  • the mask 200 may include one or more gaps that outline a pattern.
  • the mask 200 is a pigmented layer or it is formed by depositing metal or by removing metal.
  • the thickness of an active electrochromic layer 10 or 20 may lie in the range 50 run to 1000 nm.
  • the thickness of the electrolyte layer 30 may lie in the range 50 nm to 1000 nm.
  • the electrochromic multilayer structure 1 may be worn on a nail O, as shown. It may be fastened uo the nail in various ways, as described below. However, the invention is not limited to making-up nails .
  • the stack of electrode, active electrochromic, and electrolyte layers constitutes an electrosensitive stack that is capable of changing in appearance in response to electrical excitation.
  • the electrochromic multilayer structure may be electrically excited temporarily, merely no change the appearance of the electrochromic multilayer structure, or permanently, i.e. for the entire duration the device is being used, depending on the multilayer structures used.
  • the electrochromic multilayer structure may preserve its appearance once electrical excitation ceases, or it may change in appearance once electrical excitation ceases .
  • One of the means for preserving the effect after electrical excitation relies on using low-conductivity electrolyte polymers, thereby slowing down the phenomenon of the electrochromic layers relaxing.
  • Conventional solid, electrolytes that are based on polyethylene oxide (PEO) or even polypropylene oxide (PPO) , and that present quite low conductivity (XO "7 Siemens per centimeter
  • a solid polymer electrolyte that is constituted by two interpenetrating phases: a cross-linked inert solid phase and a liquid polymer phase (polyether of low molecular weight) of good ionic conductivity (>10 ⁇ 4 S/cm) .
  • the relative proportions of the cross-linked phase and of the liquid phase are selected in such a manner as to combine the good mechanical and electrochemical
  • the ionic conductivity of the electrolyte is about 10 ⁇ 4 S/cm at ambient temperature.
  • the electrical conductors 81 and 82 may pass through the various layers of the stack, and, when necessary, they may be insulated electrically by respective
  • insulating layers 84 and 85 e.g. in the form of
  • the electrical conductors 81 and 82 are for contacting a power supply via their bottom ends that are situated in front of the nail O, on the bottom face of the electrochromic
  • the electrical conductors 81 and 82 may be made by means of : metal conductor wires or strips; deposits of a metal, of polymer, or of an electrically-conductive ink; or in some other way, e.g. by extending the electrode layers out from the electrosensitive stack.
  • electrical conductors 81 and 82 are made, e.g. the conductor 81 not having an electrically-insulating sheath, whereas the conductor 82 includes electrical insulation 84 that extends only on the side of the electrode layer 50, for example, thereby offering the possibility of powering the conductor 82 not only via the bottom face of the electrochromic device 1, but also via its distal end edge 88.
  • the conductor 82 has an electrically-insulated bottom end, and can be powered only via its face lying at the distal end edge 88.
  • Figure IB shows the possibility of the electrical conductors 81 and 82 being made with conductive materials that extend up to the respective active electrochromic layers 20 and 10.
  • Figure IB shows the possibility of the mask being situated on top of the support layer 60.
  • the electrochromic multilayer structure 1 may also include an integrated energy source, thereby making it possible, for example, to subject it to a voltage that is constant or that changes in predefined manner while it is being worn by the user, the voltage changing in accordance with a program stored in a
  • processor embedded in the electrochromic multilayer structure for example, or depending on the state of a digital or analog oscillator circuit, e.g. of the
  • multivibrator type e.g. referenced KTE555D.
  • the presence of an integrated energy source also makes it possible to use an electrosensitive stack in which the change in appearance in response to electrical excitation exists for only as long as the electrical excitation lasts.
  • an integrated energy source 90 is connected to the electrode layers 40 and 50 via electrical conductors 91 and 92, possibly, and as shown, using an electrical circuit 95 that may include, or be constituted by, a control and/or adjuster member 97, e.g. a potentiometer and/or a switch, that is
  • a device suitable for being actuated by the user so as to change at least one operating characteristic of the device, e.g. switching the device on or off, or so as to change at least one operating parameter, e.g. a frequency for changing appearance, and/or the amplitude of the
  • the switch and/or potentiometer may be accessible from the bottom face of the device, in front of the na.il, or at its distal end.
  • the device may be made available, within a single package, together with an accessory that makes it
  • the electrical circuit 95 may possibly have one or more sensors Integrated therein, which sensors are sensitive to external stimulus, e.g. sensitive to light, humidity, and/or temperature.
  • the color of the electrochromic multilayer structure may vary as a function of humidity, temperature, or ambient light by means of an electronic circuit that changes the
  • excitation voltage of the electrochromic multilayer structure as a function of the output from a humidity, temperature, or light sensor.
  • the energy source 90 is of the battery or capacitor type, and may be ⁇ iade by printing, where appropriate.
  • An electrical energy source of the paper battery type e.g. referenced SOFT BATTERIE ⁇ , may be used that makes it possible to generate a voltage in the range about 2.5 volts (V) to 3 V as a function of area, for thickness of about 400 ⁇ m, for example.
  • Such a battery may use a paper-based electrolyte between an anode and a cathode that are made respectively of
  • the integrated energy source may also be of the type described in the articles: "Photo-Crosslinked Nltroxide Polymer Cathode Leading to an Organic-Based Paper
  • Such a battery functions on a principle of oxidation reduction, and may be ' in the form of a film having thickness of 200 nm.
  • the excitation voltage of the electrochromic multilayer structure may be constant, or it may vary in numerous ways over time, e.g. in steps or in one or more ramps, e.g. of triangular shape, or even in sinusoidal manner.
  • the excitation voltage may be substantially constant while trie device is powered, and decrease as the energy source progressively runs flat.
  • the integrated energy source may also include a photovoltaic cell or a mechanism that draws its energy from the movements of the user.
  • the voltage applied to the electrosensitive stack may depend on a timer, e.g. for switching off the device after a predefined duration, or it may depend on at least one signal coming from a sensor that is sensitive to a stimulus, e.g. a light sensor, as mentioned above.
  • the device may include an
  • the electronic circuit that is configured to read information remotely, e.g. by means of one or more electrical contacts, or wirelessly, e.g. by means of an optical or radio frequency (RF) connection.
  • the information makes it possible to program the operation of the device, e.g. the excitation level of the
  • the device may have an antenna integrated therein, which antenna is capable of receiving electrical energy when it is subjected remotely to an excitation field and/or is capable of receiving information, e.g. relating to a mode of operation of the electrochromic multilayer structure.
  • the antenna may be coiled, printed, or embedded in an electronic chip thac is integrated in the device. Where appropriate, such a chip may include an embedded bactery, optionally-rechargeable.
  • the energy source is superposed on the nail .
  • the energy source is siruated in front of the nail, e.g. on the underside of the device. This makes it possible to reduce the thickness of the structure in its portion that is superposed on rhe nail. This also makes it possible, where appropriate, to replace the energy source more easily, when said energy source is a miniature battery, e.g. of the button-battery type.
  • the electrochromic multilayer structure may be excited with electrode layers that are each at a
  • the electrochromic multilayer In a variant, the electrochromic multilayer
  • structure includes an electrode layer including at least two regions that are suitable for being powered
  • one of the electrode layers includes two regions that extend in disjoint manner and that are connected respectively to two outlets of an electronic component enabling them to be powered selectively.
  • the electrochromic multilayer structure may be fastened to keratinous materials, e.g. the nails, in various ways, and preferably by means of a system that enables the device to be removed without risk of damaging said device.
  • the electrochromic device may include an adhesive that covers the bottom support layer, enabling the device to adhere when it is put into contact with che
  • application zone e.g. the nails or the lips.
  • Figures 2 and 3A show an adhesive layer 100, the adhesive preferably being hypoallergenic.
  • the adhesive may include a block copolymer such as styrene block copolymers available from Kraton, or an acrylic polymer of molecular weight that is greater than 30000, better greater than 100000, preferably greater than
  • the block copolymer or acrylic polymer may be present in the adhesive layer at a content by weight that is greater than 20%, preferably greater than 30%, thereby making it easier to obtain a cohesive adhesive layer that is capable of maintaining its integrity during
  • the electrochromic device may include an adhesive layer that is cross-linkable on application, with the advantage of encouraging the adhesive layer to adhere to the application zone, in particular the nails or the lips. Before cross-linking, the adhesive layer may develop good wettability on the application zone. After cross-linking, the adhesive layer is harder and is more able LO withstand shear.
  • the electrochromic device may be made available in a leaktight package, so as to ensure that cross-linking does not initiate before the device is used.
  • the cross-linkable adhesive includes a cyanoacrylate .
  • the cross-linkable adhesive may include a mixture of ethyl cyanoacrylate, polymethyl methacrylate, and hydroquinone (adhesive available from "Francenails" ⁇ -
  • the electrochromic device may include an adhesive layer that includes at least 5%, preferably at least 10%, of at least one residual solvent. This characteristic has the advantage of encouraging the adhesive layer to adhere to the application zone, in particular the nails or the lips. Before complete drying, the presence of residual solvent promotes wettability of the adhesive layer on the application zone. After complete drying, the adhesive layer is harder and is more able to
  • the adhesive may include either a block copolymer such as styrene block copolymers available from Kraton, or an acrylic polymer, or a silicone adhesive of the BIO/PSA type.
  • the adhesive Is an acrylic adhesive in solvent phase, e.g. like the adhesives from the Duro-Tak range available from National Adhesives, and including more than 10% residual solvent.
  • the adhesive is preferably present on the multilayer structure before said structure is put into place, but, in a variant, it may be applied to the nail, and then the multilayer structure is brought into contact therewith.
  • Figure 3B shows a fastener system making use of mechanical fastening 110.
  • the electrochromic multilayer structure may also be fastened in some other way, e.g. by both adhesion and by clamping, by magnetization, or by electrostatic
  • the fastener means used e.g. an adhesive or a mechanical fastening at the end of the nail, for fastening the electrochromic device to the keratlnous materials are no longer shown for the purpose of clarity in the drawings.
  • electrochromic multilayer structure 1 may be coated in one or more outer protective layers 120 that may
  • At least one outer protective layer 120 may adhere by means of electrostatic forces or by using an adhesive.
  • the device 1 includes a plurality of peelable protective layers that are suitable for being removed successively as soon as defects (scratches, wear) are observed.
  • the presence of a plurality of peelable layers at the surface of the device makes It possible to remove one of the layers at the surface, e.g. when a scratch is observed on the surface of the device.
  • electrochxomic devices are relatively costly technological items that need to be conserved in such a manner as to be able to use them several times, if possible.
  • the peelabie layers comprise layers of alternating chemistries, so that the layers present the characteristic of not adhering to one
  • a cross-linked top coat coats the surface of the electrochromic device so as to make it longer lasting.
  • Cross-linking may be achieved either by an epoxy and amine reaction, or with
  • the thickness of the layer of top coat is less than 50 ⁇ m, preferably less than 20 ⁇ m, better less than 10 ⁇ m, so as to limit the impact of the top coat on the flexibility of the device. Examples of cross-linked top coats are given in
  • the first and/or second active electrochromic layers 10 or 20 may be made with thickness that is not uniform, e.g. thickness that varies in discontinuous manner, such that the appearance produced by the electrochromic structure depends on whether or not the material of the active electrochromic layer is present.
  • gaps 10a and/or 20a are made in the respective layers 10 and/or 20.
  • the material of the layer 10 or 20 may be deposited in a pattern, by printing or transfer.
  • gaps 10a and/or 20a are made by using a material-removal technique, e.g.
  • a layer deposited in the form of a pattern e.g. a heart, may be used.
  • Such a layer may be not colored without electrical excitation, and change color under electrical excitation, e.g. towards blue. It makes thereby possible for a heart- shaped pattern to appear violet if the colored background is red.
  • electrode layers 40 and 50 may be present respectively above and below the gaps 10a or 20a.
  • both the first and second active layers 10 and 20 may be made in
  • the presence of the gaps 10a and/or 20a makes it possible to form one or more patterns that are visible only under certain conditions of electrical excitation of the electrochromic structure.
  • the nail appears uniform in color, as shown in Figure 7A.
  • the uniform color may be the color of the nail, for example, or it may result from the intrinsic color of one of the layers of the structure.
  • a pattern M may appear on the nail, e.g. a heart-shaped pattern, as shown in Figure 7B, as a result of the change in appearance of the electrosensitive stack.
  • the electrode layer, the active electrochromic layer, and/or the electrolyte layer are uniform, in particular are of constant
  • a shield 160 between one of the active electrochromic layers 10 or 20 and the electrolyte layer 30, e.g. a shield of electrical insulation, making it possible locally to distance the electrolyte layer from an adjacent active electrochromic layer, as shown in Figures 5D or 5E, or to change in some other way the interaction between the layers that are situated on either side of the shield 160 and that are in contact therewith.
  • the shape given to the shield 160 depends on the shape of the pattern that it is desired to produce.
  • the shield 160 is deposited by
  • the shield 160 may be machined, cut out, or etched to form the desired pattern (s) .
  • the shield 160 may be optionally colored, optionally reflective, may be composed of PMMA, or made of PET.
  • the thickness of the shield 160 lies in the range 1 urn to 100 ⁇ m, preferably in the range 5 ⁇ m to 30 ⁇ m.
  • At least one of the layers of the stack of the multilayer structure may have properties that are not uniform as a result of using, within the layer, materials having different electrical and/or optical properties.
  • the electrolyte layer 30 may comprise one or more first regions 30a that comprise a first electrolyte, and one or more second regions 30b that comprise a second electrolyte that is different from the first.
  • the regions 30a and 30b are deposited by printing, or one of the regions is formed by treating, in selective manner, the material of the other region, so as to transform the material and change its properties.
  • One of the regions 30a and 30b may be of shape that corresponds to the shape of the pattern to be made.
  • One of the regions 30a or 30b may be inert from an
  • At least one of the active electrochromic layers 10 or 20 may be made with thickness that is not constant, but not zero, as shown in Figures 5G, 5H, and 51.
  • the electrolyte layer 30 may also be made with a variation in thickness, as in Figure 5J.
  • the thickness may vary in progressive manner so as to produce shading, with said thickness reducing, optionally in constant manner.
  • the variation may occur in one of the directions of a plane, or, in a variant, in both directions.
  • a spreader that moves in a second direction Y that is perpendicular to the first and of slope in the first direction that gives the variation in the thickness in that direction.
  • the thickness may also pass via an extremum that may be a maximum or a minimum.
  • the thickness of one of the layers of the stack, at least one ocher layer of the structure may present thickness that varies in the opposite direction.
  • the other layer may be an adjacent layer.
  • the other layer may optionally be electrically active, and may optionally be optically active .
  • a plurality of materials presenting different conductivities and/or different electrochromic properties may be used, as shown in Figures 5L and 5K.
  • Figure 5L shows the possibility of making the layer
  • Figure 5K formed of regions 10a and 10b made out of different materials.
  • the different materials may be active electrochromic agents, but, in a variant, only one of the materials has this role, the other possibly being inert from an electrochromic point of view.
  • the materials of the regions 20a and 20b may optionally be in contact .
  • the regions made with the material that is inert from an electrochromic point of view may be used to compensate for the thickness of the other active
  • two polymers may be used, being juxtaposed or mixed, in homogeneous manner or without the mixture leading to a homogeneous whole, thereby making it possible to create other colors and/or to form one or more patterns that are visible only while the device is being activated, for example.
  • polymers having different electrical conductivities may be used, thereby generating contrasts between the various regions .
  • the layer of electrochromic conductive polymer may, for example, include a material selected from:
  • conductive polymer includes a material selected from: polydiphenylamine,- poly (4-amino biphenyl) ; poly (3 -alky1 (Ci to C8) thiophenes) ; poly (diphenyl benzidine);
  • polyphenylene poly (phenylene vinylene); a poly (ailylene vinylene); a poly (aminoquinoline) ; poly ⁇ 3,4- ethylenedioxythiophene) ; and derivatives thereof; or derivatives or copolymers thereof; and a dopanc .
  • the device 1 may be provided with at least one optically-active, non-electrochromic layer 308 acting as a filter against incident and/or reflected light, as shown in Figure 6 ⁇ , or as a background, in particular a colored background, as shown in Figure 6C .
  • the layer 308 may be continuous, as shown in Figures 6D and 6E, or discontinuous, as shown in Figures 6A, In particular, the layer 308 may form a pattern.
  • the mask 200 may possibly be integrated in the support layer 60, as shown in Figure 6B.
  • the electrochrornic device may include at least one such optically-active layer including an interference pigment e.g. a nacre or a goniochromatic pigment, disposed in an optionally-uniform layer, e.g. in a pattern.
  • an interference pigment e.g. a nacre or a goniochromatic pigment
  • nacres suitable for being introduced as interference pigment and that may be mentioned are gold color nacres, in par t icular those sold by ENGELHARD under the crade names Brillant gold 212G (Timica) , Gold 222C (Cloisonne) , Sparkle gold (Timica) , Gold 4504 ⁇ Chromalite) , and Monarch gold 233X
  • ENGELHARD under the trade name Super bronze (Cloisonne) ; orange nacres especially those sold by ENGELHARD under the trade names Orange 363C (Cloisonne) and Orange MCR 101 (Cosmica) , and by MERCK under the trade names Passion orange (Colorona) and Matte orange (17449) (Microna); brown-tinted nacres sold by ENGELHARD under the trade names Nu-antique copper 340XB (Cloisonne) and Brown
  • CL4509 Chromalite
  • nacres with a copper glint sold by ENGELHARD under the trade name Copper 340A (Timica) ;
  • the electrochromic device may be arranged in such a manner that, on changing color while being electrically excited, it filters at least one wavelength, and thus changes the color resulting from superposing the
  • optically-active layer including the interference pigment and at least one layer of the electrosensitive stack.
  • the electrochromic device may be used to suppress one or more color components of at least one interference pigment, thereby presenting a change in color as a function of the angle of observation and/or of the curvature of the support.
  • the electrically-excitable stack of the electrochromic device may present a color that filters one of the components of the color path of an underlying goniochromatic interference pigment.
  • the electrochromic device may be arranged to present a blue color that absorbs the gold color. In this way, while the
  • the electrochromic device may also include a layer containing at least one diffractive pigment.
  • the diffractive pigment used may be selected from those described in US patent application No.
  • a diffractive pigment may, for example, have the following structure: MgF2/Al/MgF 2 , a diffractive pigment having this structure being sold by FLEX PRODUCTS under the trade names SPECTRAFLAIR 1400 Pigment Silver or
  • SPECTRAFLAIR 1400 Pigment Silver FG The proportion by weight of MgF 2 may lie in the range 80% to 95% of the total weight of the pigment.
  • diffractive pigments are sold by ECKART® under the trade names Metalure® Prismatic.
  • the electrosensitive stack may be used on demand to filter at lease one wavelength of the light reflected by the underlying diffractive pigment.
  • the diffractive pigment may present a goniochromatic effect, in
  • a rainbow effect that may be complete while the electrochromic device is not being activated, and may be limited to a fraction of the visible spectrum while the electrochromic device is being activated, by
  • the electrochromic device may include at least one luminescent compound that is sensitive to at least one wavelength that causes it to luminesce.
  • the electrosensitive stack of the electrochromic device may be used to filter the excitation wavelength (s) of the underlying luminescent compound, which may be a fluorescent or phosphorescent compound, for example.
  • the electrochromic device may optionally be used to enable the luminescent compound to be illuminated.
  • the electrochromic device may be used to filter infrared or ultraviolet, and the luminescent compound may be fluorescent in infrared or ultraviolet. By inhibiting the fluorescence to a greater or lesser extent depending on the excitation siate of the electrosensitive stack, it is possible to change the appearance of the luminescent compound .
  • the device may include a fluorescent compound having a color, e.g. a red color, that is intensified by light excitation.
  • the electrosensitive stack may be used to filter, in optionally-local manner, the light activating the fluorescent compound. Locally inhibiting fluorescence could lead to a difference in appearance between the zones of the compound in which the
  • the luminescent compound may be selected from suitable commercially-available photoluminescent agents, and, amongst others, mention may be made of the
  • At least one photoluminescent agent may include a semi-conductor, in particular in the form of particles, e.g. of Si, ZnO, CdSe, ....
  • a semi-conductor in particular in the form of particles, e.g. of Si, ZnO, CdSe, ....
  • photoluminescent agent may include particles of average size lying in the range about 1 nm to about 10 run, present in uhe form of crystals, e.g. of CdSE, CdSe/ZnS, or CdTe/CdS. Powder particles of PMMA, polyethylene (PE) , polystyrene (PS) , or polycarbonate (PC)
  • the electrochromic device may include at lease one metal pigment, in particular a pigment that makes it possible to create highlight points on the made-up zone.
  • the color of the metal particles may be modulated by the eiectrosensitive stack when said stack varies from transparent to colored or from one color to another as a function of uhe electrical excitation thereof.
  • the metal particles may be reflective, being silvery, golden, or coppery, and, by way of example, they may be situated in an optically-active layer within the eiectrosensitive stack, on said electrosensicive stack, or beneath said electrosensitive stack.
  • the metal particles may be selected from reflective particles comprising an inorganic substrate coated with a metal layer; mention may also be made of particles comprising a substrate of borosilicate coated with silver. Glass substrate particles coated with silver in the form of flakes are sold under the trade name
  • MICROGLASS METASHINE REFSX 2025 PS by TOYAL Glass substrate particles coated with an alloy of nickel, chromium, and molybdenum are sold under the trade name CRYSTAL STAR GF 550, GF 2525 by the same company.
  • Reflective particles having a metallic glint and of any shape may also be selected from particles of
  • synthetic substrate at least partially coated with at least one layer of at least one metal oxide selected, for example, from oxides of titanium, in particular TiO2 , of iron, in particular Fe 2 O 3 , of tin, or of chromium, barium sulfate, and the following materials: MgF 2 ; CrF 3 ; ZnS; ZnSe; SlO 2 ; Al 2 O 3 ; MgO; Y 2 O 3 ; SeO 3 ; SiO; HfO 2 ; ZrO 2 ; CeO 2 ; Nb 2 Os; Ta 2 O 5 ; M0S2; and mixtures thereof.
  • at least one metal oxide selected, for example, from oxides of titanium, in particular TiO2 , of iron, in particular Fe 2 O 3 , of tin, or of chromium, barium sulfate, and the following materials: MgF 2 ; CrF 3 ; ZnS; ZnSe; SlO 2 ; Al 2 O 3 ;
  • reflective particles examples include particles comprising a substrate of synthetic mica coated with titanium dioxide, or glass particles coated either with brown iron oxide, titanium oxide, tin oxide, or one of their mixtures such as those sold under the trade name R ⁇ FL ⁇ CKS® by ENGELHARD.
  • reflective particles having a metallic glint and presenting a metal compound on their surface or including at least one coated metal compound are particles proposed under the trade names: METASHINE® ME 2040 PS, METASHIN ⁇ ® MC5090 PS, or METASHINE® MC280GP (2523) by NIPPON SHEET GLASS;
  • the electrochromic device may be made in such a manner as to vary the visible contrast between at least a colored first region and a surrounding second region having a color that is a function of the activation state of the electrochromic device, for example.
  • a color that is a function of the activation state of the electrochromic device for example.
  • Figure 7C shows at least a first region Ri having a color that is predefined, and at least a second region R 2 adjacent to the first region Ri and having a color that changes depending on the activation state of the
  • the color of the region R 2 may pass from a color in which the region Ri is clearly visible, as in Figure 1C, to a state in which the color of the region R 2 is close to the color of the region R 1 , and in which the region Ri is difficult to distinguish due to a lack of contrast.
  • the region R 2 corresponds to a background of uniform color beneath the electrosensitive stack.
  • the region R 2 is defined as a surface layer.
  • the region R 2 is defined by a layer that is present within the electrosensitive stack.
  • the electrochromic device may include at least one "Xchrome” coloring agent that is sensitive to external stimulus, e.g. a photochromic, solvatochromic, or
  • a region including such a coloring agent may be of appearance that changes as a function of the environment; of the made-up zone, but also of the state of the electrochromic device that may be used, to filter a color of the Xchrome pigment and/or as a color environment of the coloring agent.
  • the electrochromic device may be used for optionally-enabling the photochromic agent to be excited by the surrounding light.
  • the electrosensitive stack may be arranged so as to filter at least one excitation wavelength of the photochromic agent.
  • the photochromic agent may or may not react to the
  • Figures 7E uo 7H show various effects that may possibly be obtained.
  • Figure 7E shows the appearance of made-up zones without electrical excitation
  • Figure 7G shows the appearance of the made-up zone without light activation but with elecurical excitation
  • Figure 7H with light
  • the electrochromic device may be used to improve the electrochromic device
  • the electrosensitive stack of the electrochromic device and of the color of the interference pigment (s) It is possible to amplify the intensity of the color that is seen. For example, if the eleccrochromic device contains at least one nacre, e.g. in one of the layers of the stack or even at Its surface, e.g. a red-colored nacre, and if the electrochromic device makes it possible to change the color of the electrosensitive stack from blue to green, the intensity of the color of the nacre is seen to be more intense with the green-colored
  • the electrosensitive stack of the electrochroinic device When the electrosensitive stack of the electrochroinic device is made so as to display a color that is close to the color of a zone that is present at its surface or within the srack, the visibility of the zone may be decreased. If said zone presents a
  • the electrochromic device is capable of presenting, by activation, one of the colors included in the color path, it becomes optionally possible to mask the presence of the zone as a function of the angle of observation, of lighting, and/or of the curvature of the device.
  • the color path of a goniochromatic pigment may be revealed on demand to a greater or lesser extent, e.g. for optionally increasing a volume effect.
  • the electrochromic device may be used to reinforce, in selective manner, the color effect of a pearlescent pigment, e.g. a nacre.
  • a pearlescent pigment e.g. a nacre.
  • the electrosensitive stack may be used to absorb or to reflect the light transmitted by an optically-active layer deposited on the surface of the electrochromic device, the layer containing an interference pigment, e.g. a nacre giving an iridescent effect, or a liquid crystal.
  • an interference pigment e.g. a nacre giving an iridescent effect
  • a liquid crystal e.g. a nacre giving an iridescent effect
  • nacres suitable for being introduced Into the composition as interference pigment and that may be mentioned are gold color nacres, in particular those sold by ENGELHARD under the trade names Brillant gold 212G (Timica) , Gold 222C (Cloisonne) , Sparkle gold (Timica) , Gold 4504 (Chromalite) , and
  • Copper 340A (Timica) ; nacres with a red glint, especially those sold by MERCK under the trade name Sienna fine (17386) (Colorona); nacres with a yellow glint,
  • interference pigments presenting magnetic properties are those sold under the trade names COLORONA BLACKSTAR BLUE,
  • COLORONA BLACKSTAR GREEN COLORONA BLACKSTAR GOLD
  • the electrosensitive stack may present cameo (pale/ ⁇ ark) variation as a function of the electrical excitation.
  • cameo pale/ ⁇ ark
  • the interference pigment that is situated above the electrosensitive stack is barely visible.
  • the electrosensitive stack or the liquid crystal is dark, the interference pigment or the liquid crystal becomes clearly visible.
  • Figures 71 and 7J show the appearance when an interference pigment is visible to a greater or lesser extent depending on the color of the background.
  • Figure 71 shows a dark background color, e.g. when the electrochromic device is not activated
  • Figure 7J shows a pale background color, e.g. when the
  • electrochromic device is activated.
  • Figure 8 shows a device 300 that is suitable for electrically powering an example of an electrochromic device I of the invention, when said device does not include an integrated energy source, or when said source needs to be charged and/or the device needs to be
  • the device 300 may include a housing 301 for
  • the housing 301 possibly being provided with electrical contacts 302 and 303, e.g. for electrically powering the electrochromic device.
  • the electrical contacts 302 and 303 may be fastened or mounted on springs, so as to adapt more easily to the finger.
  • the device 300 includes an RF device making it possible to transmit, by induction, energy and/or information to an antenna that is
  • the user may engage a finger in the housing 301, as shown in
  • a power-supply device such as the device 300, for example, may be put on sale together with the
  • a display unit may be present at the point of sale, with at least one tester enabling the consumer to apply the electrical stimulation and thus observe the change in color.
  • the display unit may include various electrical excitation means.
  • Figure 10 shows an example of a display unit 400 chat is suitable for being used to present one or more eiectrochromic multilayer structures of the invention to consumers .
  • the display unit may include means that make it possible to power one or more eiectrochromic structures selectively, so as to enable an observer to see the change that is induced by a change In the electrical excitation of at least one of the eiectrochromic
  • the power-supply means are In the form of a stylus 410, or other handpiece, that the user may use for electrically powering the chosen multilayer eiectrochromic structure.
  • the display unit may include a plurality of power-supply means 410, so as to enable it to be used by a plurality of people simultaneously.
  • the eiectrochromic structures present on the display unit may be associated with identifiers enabling the consumer subsequently to obtain a package containing the
  • the display unit may also include an electrochromic multilayer structure that is excited automatically or when an observer acts on a control member, in order to observe the effect of the change in appearance.
  • the electrochromic multilayer structure may be a structure that Is identical to the structures put on sale, or it may be a bigger structure that can be seen more easily from afar.
  • an entire range of electrochromic multilayer structures may be made available to the user, as shown in Figure 13, e.g. of different sizes, in order to be able to fit them to different fingers.
  • a help system for helping to select sizes may be made available to users.
  • the selection help system may be included in a panel presenting drawings, diagrams, or photographs of fingers. It thus suffices to place a finger on the panel, and to Identify the finger or nail in the drawing, diagram, or photograph that corresponds best to the user's own finger or nail.
  • a reference corresponding to the selected size of finger or nail makes It possible to select an electrochromic device of the most appropriate size. Preferably, at least eight or ten different electrochromic nail sizes are made
  • the electrochromic devices may be in the form of false nails that may be made available to users in packets of 10 electrochromic false nails (for each hand), with, for example, amongst the false nails, two nails of width lying in the range 1.1 cm to 1.3 cm, preferably two nails of width 1.2 cm (for the thumbs) , two nails of width lying in the range 0.6 cm to 0.8 cm, preferably two nails of width 0.7 cm (for the little fingers) , and six nails of width lying in the range 0.8 cm to 1.0 cm, preferably six nails of width 0.9 cm (for the other fingers) .
  • the false nails may also be made available to users singly.
  • the electrochromic device (s) may be sold in at least one package that is transparent at least in part, making it possible to see a change in appearance of the
  • electrochromic device associated with a change in the excitation of said device.
  • the electrical contacts of the electrochromic device (s) may be connected to a battery that is contained in the package with an
  • the switch makes it possible to cause electric current to pass, e.g. under the effect of pressure exerted by the user at a predefined location on the package.
  • the device includes a handpiece that is handled by the user, the end of said handpiece being provided with two electrical terminals 420 and 421 for electrically contacting two corresponding contacts of the electrochromic multilayer structure, e.g. situated at the distal end thereof or on a bottom face thereof.
  • the device 415 may house an electrical energy source 423.
  • the device 415 may include an activation button 424 and a switch 425, making it possible optionally to connect at least one of the terminals 420 or 421 to the energy source 423.
  • the user may use the device 415 by bringing it into contact with the electrochromic multilayer structure to be excited, and then press the activation button 424 for accurately controlling the duration during which voltage is applied.
  • the user may stop applying voltage when the desired appearance is achieved.
  • the invention is not limited to an electrochromic device for applying to a nail, and, by way of example, the electrochromic device may be applied to the lips or to the skin, e.g. by using a hypoallergenic adhesive.
  • the peelable protective film shown in Figure 4 may be added to any of che stacks described in Figures 5A to 51 and 6A to 6E, amongst other embodiments.
  • the patterns produced with the electrochromic multilayer structure may be various, in particular they may correspond to any alphanumeric character and/or shading, in particular any design incorporating shading.
  • the pattern may possibly be personalized, with the person who is to receive the device providing an image of a chosen pattern, and with the electrochromic multilayer structure being made accordingly.
  • the invention is not limited to electrochromic multilayer structures in which the electrode layers and the active eieccrochromic layers are distinct, and these layers may coincide, where appropriate, as shown in publication WO 2005/015301.
  • the pattern (s) may be visible only while the
  • electrochromic device is being excited, or, in a variant, they may cease to be visible only while the
  • the active eleccrochromic layers may include one or more polymers selected, for example, from the following list and used alone, in a mixture, or in juxtaposed manner :
  • the layer of electrochromic conductive polymer may, for example, include a material selected from: polyaniline; polythiophene; and
  • the layer of electrochromic conductive polymer includes a material selected from: polydiphenylamine; poly ⁇ 4-axnino biphenyl ⁇ ; poly ⁇ 3-alkyl (Ci to C8) thiophenes) ; poly (diphenyl benzidine); polyphenylene; poly (phenylene vinylene) ; a poly (allylene vinylene); a poly (aminoquinoline) ;
  • the electrolyte layer is preferably chosen among mixtures of a polymer with a dissolved salt.
  • the polymer is chosen, for example, in the following list: polyethylene glycols, polypropylene glycols, ethylene polyoxides, oxyethyiene and epichloridrine copolymers, propylene polyoxides, poiyalkyl- methacrylate ⁇ , and polyalkyle-acrylates .
  • the salt may be sodium chloride, lithium chloride, lithium perchlorate, lithium trifluoromethylsulfonate, lithium hexafiuorophosphate, or lithium
  • the eiectrolyce layer may especially be a mixture of lithium perchlorate, and oxyethyiene and epichloridrine copolymer .
  • the polymers may also be used without being
  • polyelectrolytes polymers such as sulfonates polystyrenes, polyimidazole chlorides or bromides, polyvinylpyridine ⁇ , and
  • a film of polypyrrole was then deposited by
  • electrophoresis on a second layer of polyethylene terephthalate covered with electrically-conductive transparent oxide was performed with an aqueous solution containing lithium perchlorate by using a constant potential of 0.7 V.
  • a second electrode support layer coated with a second active electrochromic layer was obtained.
  • the electrolyte was made by dissolving 0.015 grams (g) of lithium perchlorate in a mixture of 0.7 g of oxyethylene and epichloridrine copolymer (available from DAISO Co. under the reference EM-2), and 5 milliliters ⁇ mL) of tetrahydrofuran. The mixture was then coated on the electrode covered with Baytron. After two hours of drying at ambient temperature, the backing-electrode covered with polypyrrole was added while exerting pressure in order to obtain the electrosensitive stack. The stack presented a change in color between the yellow and the dark blue, when the applied potential varied between -1.5 V and +1.5 V. The change in color occurred in less than 10 seconds. The maximum change in
  • a mask-forming opaque film e.g. of color red
  • a pattern e.g. a star
  • Electrical excitation made it possible to change the color of the pattern defined by the cutout in the mask.
  • Example differs from example 1 by the fact that the first active electrochromic layer was coated so as to form a pattern. Electrical excitation of the device made it possible to change its color, as shown in Figures 7A and 7B.
  • This example differs from example 1 by the fact that the layer of Baytron® was deposited in non-uniform manner.
  • the spreader was controlled in such a manner as to have two sides of different height. Color shading could be obtained that presented a change in color between yellow shading and blue shading by changing the potential between -1.5 V and 1.5 V.
  • Example 5 The multilayer structure of example 1 was applied to a false nail.
  • the layers of Baytron® and of polypyrrole were connected to electrical conductors that were situated on the bottom face of the false nail and at the end of the false nail so as to remain accessible, but without degrading the appearance of the device after application.
  • the electrical conductors were copper plates, each having a surface area of 1 mm 2 .
  • This example differs from example 1 by the fact that the electrosensitive stack covered an optically-active layer that was constituted by a red-colored film.
  • the device could be seen to change color between orange/brown and blue/violet by changing the potential between -1.5 V and +1.5 V.
  • the multilayer structure of example 1 was used which was connected to an SR 416 button battery that was placed beneath the multilayer structure.
  • An insulating sheet such as a film of polyethylene was inserted into the electrical circuit, which sheet acted as a switch.
  • the insulating sheet may initially be put into contact with one of the terminals of the battery beneath the device, at the end of a nail.
  • Example 6 differs from example 6 by the fact that the device was provided with a touch-sensitive switch, e.g. of PHAP 3391 type, available from APEM.
  • the switch was suitable for placing beneath the multilayer
  • Example 2 differs from example 1 by the fact that it included five alternating layers of 5 ⁇ m thick
  • peelabie protective films In order to make it easier to remove each layer, a portion of the cellulose acetob ⁇ tyrate coating exceeded the application zone a little, so that the top layer presented a tab that made it easy to take hold of the film to be peeled off, without pulling off all of the layers.
  • the electrochromic device In this example, the electrochromic device
  • the top of the device of example 1 was coated with a layer of ethanol-based varnish (20% Shellac gum, 80% ethanol ⁇ . Since PET withstands ethanol, it was possible to eliminate the protective layer with an ethanol-based makeup remover without damaging the device. It was then possible, where necessary, to reapply a protective layer using the varnish.
  • ethanol-based varnish 20% Shellac gum, 80% ethanol ⁇ . Since PET withstands ethanol, it was possible to eliminate the protective layer with an ethanol-based makeup remover without damaging the device. It was then possible, where necessary, to reapply a protective layer using the varnish.
  • goniochromatic pigment was visible to a greater or lesser extent as a function of the excitation state of the electrochromic device.
  • 3% Metashine Silver pigment (Nippon Sheet Glass) was added to the first active electrochromic layer proposed in example 1. In that way, the electrochromic effect increased by the optical effect of the metal pigment was colored to a greater or lesser extent as a function of the excitation state of the electrochromic device.
  • the invention is not limited to the embodiments shown .
  • the electrochromic device may be light-emitting or non light-emitting .

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Birds (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

Cette invention concerne un dispositif cosmétique (1) destiné à être appliqué à des matériaux kératineux humains, le dispositif possédant une structure multicouche électrochromique comprenant un empilement électrosensible formé par au moins : • des première et seconde couches d'électrodes (40 ; 50), • des première et seconde couches électrochromiques actives (10 ; 20) et • une couche d'électrolyte (30) ; la structure multicouche comprenant au moins un masque (200) permettant de former au moins un motif.
PCT/IB2010/053060 2009-07-03 2010-07-02 Article cosmétique possédant une structure multicouche électrochromique WO2011001418A1 (fr)

Applications Claiming Priority (4)

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FR0954607A FR2947427B1 (fr) 2009-07-03 2009-07-03 Article cosmetique incluant une structure multicouche electrochromique.
FR0954607 2009-07-03
US21398009P 2009-08-04 2009-08-04
US61/213,980 2009-08-04

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2605855A2 (fr) * 2010-08-20 2013-06-26 Pieter Stroeve Appareil permettant de manipuler des particules colloïdales dans un milieu bistable
FR2986421A1 (fr) * 2012-02-03 2013-08-09 Oreal Traitement cosmetique avec une surface chargee d'un substrat
WO2014168475A1 (fr) * 2013-04-08 2014-10-16 More-To.Com B.V. Composition et combinaison correspondante, procédé pour recouvrir un ongle et utilisation de la composition

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4654279A (en) 1986-07-10 1987-03-31 The United States Of America As Represented By The Secretary Of The Navy Interpenetrating-network polymeric electrolytes
US4792504A (en) 1987-09-18 1988-12-20 Mhb Joint Venture Liquid containing polymer networks as solid electrolytes
EP0612826A1 (fr) * 1993-02-26 1994-08-31 Donnelly Corporation Films électrochromes polymères solides, fabrication de dispositifs électrochromiques utilisant de tels films soldides et procédé de fabrication de tels films solides et dispositifs
FR2811206A1 (fr) 2000-07-06 2002-01-11 Oreal Dispositif permettant de creer des effets optiques sur un individu
FR2825619A1 (fr) 2001-10-01 2002-12-13 Oreal Composition cosmetique destinee a creer un effet optique, comprenant au moins un polymere electroluminescent et/ou electroconducteur
US20030031870A1 (en) 2001-07-31 2003-02-13 Flex Products, Inc. Diffractive pigment flakes and compositions
WO2003098339A2 (fr) 2002-05-22 2003-11-27 Saint-Gobain Glass France Dispositif electrocommandable a proprietes optiques et/ou energetiques variables
WO2005015301A1 (fr) 2003-08-05 2005-02-17 Fundacion Cidetec Dispositif electrochromique a base de polymeres conducteurs, procede de production associe et produit ainsi obtenu
JP2006230436A (ja) 2005-02-22 2006-09-07 Matsushita Electric Ind Co Ltd 装身具およびその書き込み装置
JP2006262982A (ja) 2005-03-22 2006-10-05 Japan Research Institute Ltd つけ爪装置およびつけ爪装置システム
US20080031836A1 (en) 2004-05-19 2008-02-07 L'oreal Crosslinked Nail Varnish Film
WO2008053549A1 (fr) 2006-11-01 2008-05-08 Boofoowoo Co., Ltd. Faux-ongle monté avec un dispositif d'affichage d'image
JP2008168062A (ja) * 2007-01-15 2008-07-24 Ricoh Co Ltd 電子ネイル及び電子ネイル変更装置

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4654279A (en) 1986-07-10 1987-03-31 The United States Of America As Represented By The Secretary Of The Navy Interpenetrating-network polymeric electrolytes
US4792504A (en) 1987-09-18 1988-12-20 Mhb Joint Venture Liquid containing polymer networks as solid electrolytes
EP0612826A1 (fr) * 1993-02-26 1994-08-31 Donnelly Corporation Films électrochromes polymères solides, fabrication de dispositifs électrochromiques utilisant de tels films soldides et procédé de fabrication de tels films solides et dispositifs
FR2811206A1 (fr) 2000-07-06 2002-01-11 Oreal Dispositif permettant de creer des effets optiques sur un individu
US20030031870A1 (en) 2001-07-31 2003-02-13 Flex Products, Inc. Diffractive pigment flakes and compositions
FR2825619A1 (fr) 2001-10-01 2002-12-13 Oreal Composition cosmetique destinee a creer un effet optique, comprenant au moins un polymere electroluminescent et/ou electroconducteur
WO2003098339A2 (fr) 2002-05-22 2003-11-27 Saint-Gobain Glass France Dispositif electrocommandable a proprietes optiques et/ou energetiques variables
WO2005015301A1 (fr) 2003-08-05 2005-02-17 Fundacion Cidetec Dispositif electrochromique a base de polymeres conducteurs, procede de production associe et produit ainsi obtenu
US20080031836A1 (en) 2004-05-19 2008-02-07 L'oreal Crosslinked Nail Varnish Film
JP2006230436A (ja) 2005-02-22 2006-09-07 Matsushita Electric Ind Co Ltd 装身具およびその書き込み装置
JP2006262982A (ja) 2005-03-22 2006-10-05 Japan Research Institute Ltd つけ爪装置およびつけ爪装置システム
WO2008053549A1 (fr) 2006-11-01 2008-05-08 Boofoowoo Co., Ltd. Faux-ongle monté avec un dispositif d'affichage d'image
JP2008168062A (ja) * 2007-01-15 2008-07-24 Ricoh Co Ltd 電子ネイル及び電子ネイル変更装置

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
P.M. BLONSKY; D.F. SHRIVER, J. AM. CHEM. SOC., vol. 06, pages 6854 - 55
PUBLICATIONS CHEM. MATER, vol. 16, 2004, pages 4401 - 4412
T. SUGA; H. KONISHI; H. NISHIDE: "Photo-Crosslinked Nitroxide Polymer Cathode Leading to an Organic-Based Paper Battery", CHEM. COMMUN., 2007, pages 1730 - 1732
T. SUGA; Y.-J. PU; S KASATORI; H. NISHIDE: "Cathode- and Anode-Active Poly(nitroxylstyrene)s for Rechargeable Batteries: P- and N-Type Redox Switching via Substituent Effects", MACROMOLECULES, vol. 40, 2007, pages 3167 - 3173

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2605855A2 (fr) * 2010-08-20 2013-06-26 Pieter Stroeve Appareil permettant de manipuler des particules colloïdales dans un milieu bistable
EP2605855A4 (fr) * 2010-08-20 2014-05-14 Pieter Stroeve Appareil permettant de manipuler des particules colloïdales dans un milieu bistable
FR2986421A1 (fr) * 2012-02-03 2013-08-09 Oreal Traitement cosmetique avec une surface chargee d'un substrat
WO2014168475A1 (fr) * 2013-04-08 2014-10-16 More-To.Com B.V. Composition et combinaison correspondante, procédé pour recouvrir un ongle et utilisation de la composition
WO2014168476A1 (fr) * 2013-04-08 2014-10-16 More-To.Com B.V. Composition et procédé de revêtement d'un ongle

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FR2947427A1 (fr) 2011-01-07

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