EP1820058A1 - Rubans auto-adhesifs doubles faces absorbant la lumiere pour realiser ou coller des affichages a cristaux liquides - Google Patents

Rubans auto-adhesifs doubles faces absorbant la lumiere pour realiser ou coller des affichages a cristaux liquides

Info

Publication number
EP1820058A1
EP1820058A1 EP05818900A EP05818900A EP1820058A1 EP 1820058 A1 EP1820058 A1 EP 1820058A1 EP 05818900 A EP05818900 A EP 05818900A EP 05818900 A EP05818900 A EP 05818900A EP 1820058 A1 EP1820058 A1 EP 1820058A1
Authority
EP
European Patent Office
Prior art keywords
sensitive adhesive
pressure
black
layer
adhesive tape
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05818900A
Other languages
German (de)
English (en)
Inventor
Marc Husemann
Reinhard Storbeck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tesa SE
Original Assignee
Tesa SE
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 Tesa SE filed Critical Tesa SE
Publication of EP1820058A1 publication Critical patent/EP1820058A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • 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 
    • G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • 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 
    • G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
    • C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
    • C09J2301/408—Additional features of adhesives in the form of films or foils characterized by the presence of essential components additives as essential feature of the adhesive layer
    • 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 
    • G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
    • 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 
    • G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1744—Means bringing discrete articles into assembled relationship
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2848—Three or more layers

Definitions

  • the invention relates to double-sided pressure-sensitive adhesive tapes with multilayer support structures and with light-absorbing properties for the production or bonding of liquid crystal displays (LCDs).
  • LCDs liquid crystal displays
  • Pressure sensitive adhesive tapes are widely used processing aids in the age of industrialization. Especially for use in the computer industry very high demands are placed on pressure-sensitive adhesive tapes. In addition to a low outgassing behavior, the pressure-sensitive adhesive tapes should be usable over a wide temperature range and fulfill certain optical properties.
  • a field of application are LCD displays that are needed for computers, televisions, laptops, PDAs, mobile phones, digital cameras, etc.
  • spacer tapes which have light-absorbing functions, are used very frequently around LCD displays, on the one hand to prevent light from entering the display from the outside and, on the other hand, of the light source of the LC display
  • FIG. 1 An example of such an LCD module is shown in FIG.
  • black double-sided adhesive tapes are used for this application. There are many concepts for producing these adhesive tapes and the carriers required for them.
  • a concept for the production of black double-sided pressure-sensitive adhesive tapes is the coloring of the carrier material.
  • double-sided pressure-sensitive adhesive tapes with PET carriers are very preferably used, since they can be punched very well.
  • the PET supports are dyed with carbon black or black color pigments to achieve absorption of the light.
  • Such systems are currently available commercially, e.g. tesa TM 51965.
  • Another concept for the production of black double-sided pressure-sensitive adhesive tapes relates to the production of a two-layer or three-layer support material by means of coextrusion.
  • Carrier films are usually produced by extrusion.
  • Coextrusion coextrudes, in addition to the conventional support material, a second and optionally also a third black layer which fulfills the function of light absorption.
  • This concept also has several disadvantages. For example, must be used for the extrusion of antiblocking agents, which then lead in the product to the so-called pinholes. These pinholes are optical defects (light transmission at these holes) and negatively affect the operation in the LCD.
  • the black layer must also be relatively thick, otherwise no complete absorption can be realized.
  • Another disadvantage is the altered mechanical properties of the substrate because at least one black layer is coextruded which has different mechanical properties than the original substrate (e.g., PET).
  • Another disadvantage for the two-layer version of the carrier material is the different anchoring of the adhesive on the coextruded carrier material. In this case, there is always a flaw in the double-sided tape.
  • a black colored lacquer layer is coated on the carrier material on one side or on both sides.
  • This concept also has several disadvantages. On the one hand, there are also slight imperfections (pinholes) which are introduced by antiblocking agents during the film extrusion process and which can not be overcoated either. These are not acceptable for use in the LC display. Furthermore, the maximum absorption properties do not meet the requirements, since only relatively thin layers of paint are applied. Here, too, one is limited in the layer thicknesses upwards, since otherwise the mechanical properties of the carrier material would change.
  • JP 2002-350612 describes double-sided adhesive tapes for LCD panels with light-protective properties.
  • the function is achieved by a metal layer, which is applied on one or both sides of the carrier film, wherein the carrier film may additionally be colored.
  • this invention is only an attempt to compensate for the cause of the pinholes by the two-sided metallization of the carrier films. Pinhole freedom is not achieved with this concept.
  • JP 2002-023663 also describes double-sided adhesive tapes for LCD panels with light-protective properties. Again, the function is achieved by a one or both sides applied to the carrier film metal layer. Furthermore, dyed adhesives are also described in the document. In analogy to JP 2002-350612, again only an attempt is made to compensate for the cause of the pinholes by double-sided metallization of the carrier foils.
  • the object of the invention is therefore to provide a double-sided pressure-sensitive adhesive tape, which avoids pinholes in the application as much as possible and is able to completely absorb light.
  • the invention thus relates to pressure-sensitive adhesive tapes, in particular for the production or bonding of optical liquid-crystal data displays (LCDs), comprising a top and a bottom, further comprising a carrier film having a top and a bottom, wherein the pressure-sensitive adhesive tape on both the top and on the underside is in each case equipped with a pressure-sensitive adhesive layer, and wherein the pressure-sensitive adhesive layer is colored black on at least one side of the pressure-sensitive adhesive tape.
  • LCDs optical liquid-crystal data displays
  • the pressure-sensitive adhesive layers are colored black on both sides of the pressure-sensitive adhesive tape.
  • the blackening of the one or both inked pressure-sensitive adhesive layers is effected by the presence of carbon black in the pressure-sensitive adhesive.
  • the PSA tapes according to the invention consist in particular of a multilayer carrier material and two identical or different PSAs.
  • the inventive pressure-sensitive adhesive tape consists of a carrier film layer (a), a transparent PSA layer (b) and a non-transparent black-colored, in particular carbon black-colored, pressure-sensitive adhesive layer (b ').
  • the inventive pressure-sensitive adhesive tape has the product structure shown in FIG. 3:
  • the double-sided pressure-sensitive adhesive tape consists of a carrier film (a) and two non-transparent black, especially carbon black-colored, pressure-sensitive adhesive layers (b 1 ).
  • the double-sided pressure-sensitive adhesive tape consists of a carrier film (a), a metallically reflecting layer (c) and two non-transparent black, in particular carbon black-colored, pressure-sensitive adhesive layers (b 1 ).
  • the double-sided pressure-sensitive adhesive tape consists of a carrier film (a), two metallically reflecting layers (c) and two non-transparent black, in particular carbon black-colored, pressure-sensitive adhesive layers (b 1 ).
  • the carrier film (a) is preferably between 5 and 250 ⁇ m, more preferably between 8 and 50 ⁇ m, most preferably between 12 and 36 ⁇ m thick, and very preferably transparent or semi-transparent or of low light transmittance, e.g. by coloring.
  • the layers (c) are metallic shiny and light-reflecting.
  • the film (a) is vapor-coated with metal on one or both sides, e.g. with aluminum or silver.
  • the layer thickness of the layers (c) is preferably between 5 nm and 200 nm.
  • the pressure-sensitive adhesive layers (b) and (b 1 ) preferably have a thickness of 5 ⁇ m to 250 ⁇ m, respectively.
  • the individual layers (b), (b 1 ) and (c) may differ within the double-sided pressure-sensitive adhesive tape with respect to the layer thickness, so that, for example, different thickness PSA layers can be applied, but some or all of the layers may be of the same thickness be so that, for example, advantageously equally thick PSA layers can be present on both sides of the tape.
  • all filmic polymer supports can be used as film carriers, in particular those which are transparent.
  • the transparency is particularly preferred for the embodiments in which a metallically reflective layer is provided.
  • It can be e.g. (transparent or non-transparent) polyethylene, polypropylene,
  • polyester films are used, particularly preferred PET films (polyethylene terephthalate).
  • PET films polyethylene terephthalate
  • the films may be relaxed or have one or more preferred directions. Preferred directions are achieved by stretching in one or two directions.
  • anti-blocking agents such as silica, chalk or chalk, zeolites, can be used.
  • PET films especially up to 12 microns thick films
  • metal it may be very advantageous to coat the PET film one or both sides with metal.
  • the aforementioned PET films are outstandingly suitable because they allow very good adhesive properties for the double-sided adhesive tape, since the film is very flexible and can easily adapt to the surface roughness of the substrates to be bonded.
  • the films are preferably pretreated.
  • the films may thus be etched (e.g., with trichloroacetic acid or trifluoroacetic acid), pretreated with corona or plasma, or equipped with a primer (e.g., saran).
  • color pigments or color-bearing particles can also be added to the film material.
  • carbon blacks for blackening for example, carbon blacks for blackening.
  • the pigments or particles should always be smaller in diameter than the final layer thickness of the carrier film. Optimum colorations can be achieved with 5 to 40 wt .-% of particles based on the film material.
  • the pressure-sensitive adhesives (b) and (b 1 ) on both sides of the pressure-sensitive adhesive tape are preferably different.
  • pressure-sensitive adhesive systems based on acrylate, natural rubber, synthetic rubber, silicone or EVA adhesives can be used as the raw material basis.
  • natural rubber adhesives can be used.
  • the natural rubber is not ground to a molecular weight (weight average) below about 100,000 daltons, preferably not below 500,000 daltons and additized.
  • weight average weight average
  • rubber / synthetic rubber as the starting material for the adhesive wide variations are given.
  • Natural rubbers or synthetic rubbers or any blends of natural rubbers and / or synthetic rubbers can be used, the natural rubber or the natural rubbers in principle from all available qualities such as Crepe, RSS, ADS, TSR or CV types, depending on the required purity and viscosity level, and the synthetic rubber or the synthetic rubbers from the group of the random copolymerized styrene-butadiene rubbers (SBR), the butadiene rubbers (BR), the synthetic polyisoprenes (IR), the butyl rubbers (NR), the halogenated Butyl rubbers (XIIR), the acrylate rubbers (ACM), the ethylene-vinyl acetate copolymers (EVA) and the polyurethanes and / or their blends can be selected.
  • SBR random copolymerized styrene-butadiene rubbers
  • BR butadiene rubbers
  • IR synthetic polyisoprenes
  • NR butyl rubbers
  • XIIR
  • thermoplastic elastomers having a weight fraction of from 10 to 50% by weight, based on the total elastomer content.
  • SIS styrene-isoprene-styrene
  • SBS styrene-butadiene-styrene
  • (meth) acrylate PSAs are preferably used for (b) and (b 1 ).
  • (Meth) acrylate PSAs which are obtainable by free-radical polymerization advantageously comprise at least 50% by weight of at least one acrylic monomer from the group of compounds of the following general formula:
  • the monomers are preferably selected such that the resulting polymers are used as pressure-sensitive adhesives at room temperature or higher temperatures in particular such that the resulting polymers have pressure-sensitive adhesive properties according to the Handbook of Pressure Sensitive Adhesive Technology by Donatas Satas (van Nostrand, New York 1989).
  • the comonomer composition is selected such that the PSAs can be used as heat-activable PSAs.
  • the molar masses M w of the polyacrylates used are preferably M w > 200,000 g / mol.
  • acrylic or methacrylic monomers which consist of acrylic and methacrylic acid esters having alkyl groups of 4 to 14 carbon atoms, preferably 4 to 9 carbon atoms.
  • Specific examples are methyl acrylate, methyl methacrylate, ethyl acrylate, n-butyl acrylate, n-butyl methacrylate, n-pentyl acrylate, n-hexyl acrylate, n-heptyl acrylate, n-octyl acrylate, n-octyl methacrylate, n-nonyl acrylate , Lauryl acrylate, stearyl acrylate, behenyl acrylate, and their branched isomers, such as Isobutyl acrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, isooct
  • cycloalkyl alcohols consisting of at least 6 C atoms.
  • the cycloalkyl alcohols may also be substituted, e.g. by C 1-6 -alkyl groups, halogen atoms or cyano groups.
  • Specific examples are cyclohexyl methacrylates, isobornyl acrylate, isobornyl methacrylates and 3,5-
  • monomers which contain polar groups such as carboxyl radicals, sulfonic and phosphonic acids, hydroxyl radicals, lactam and lactone, N-substituted amide, N-substituted amine, carbamate, epoxy, thiol, alkoxy. Cyan radicals, ethers or the like wear.
  • Moderate basic monomers are N, N-dialkyl-substituted amides, such as N 1 N-dimethylacrylamide, N, N-Dimethylmethylmethacrylamid, N-tert-butylacrylamide, N-vinylpyrrolidone, N-vinyllactam, dimethylaminoethyl methacrylate,
  • hydroxyethyl acrylate hydroxypropyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, allyl alcohol, maleic anhydride, itaconic anhydride, itaconic acid, glyceridyl methacrylate, phenoxyethyl acrylate, phenoxyethyl methacrylate, 2-butoxyethyl methacrylate, 2-butoxyethyl acrylate,
  • the monomers used are vinyl esters, vinyl ethers, vinyl halides, vinylidene halides, vinyl compounds having aromatic rings and heterocycles in the ⁇ -position.
  • photoinitiators having a copolymerizable double bond are used.
  • Suitable photoinitiators are Norrish I and II photoinitiators. Examples are, for example, benzoin acrylate and an acrylated benzophenone from the company. UCB (Ebecryl P 36 ® ).
  • UCB Ebecryl P 36 ®
  • all photoinitiators known to those skilled in the art can be copolymerized, which can crosslink the polymer via UV irradiation via a radical mechanism.
  • Particularly preferable examples are 4-vinylpyridine, N-vinylphthalimide, methylstyrene, 3,4-dimethoxystyrene, 4-vinylbenzoic acid, benzylacrylate, benzylmethacrylate, phenylacrylate, phenylmethacrylate, t-butylphenylacrylate, t-butylphenylmethacrylate, 4-biphenylacrylate and -methacrylate, 2-naphthylacrylate and methacrylate and mixtures of those monomers, this list is not exhaustive.
  • the refractive index of the PSA increases and the scattering between the LCD glass and the PSA by e.g. Ambient light is minimized.
  • the PSAs may be mixed with resins.
  • Suitable tackifying resins to be added are the previously known adhesive resins described in the literature. Mention may be made representative of the pinene, indene and rosin resins, their disproportionated, hydrogenated, polymerized, esterified derivatives and salts, the aliphatic and aromatic hydrocarbon resins, terpene resins and terpene phenolic resins and C5, C9 and other hydrocarbon resins. Any combination of these and other resins can be used to adjust the properties of the resulting adhesive as desired. In general, all (soluble) resins compatible with the corresponding polyacrilate can be used; in particular, reference is made to all aliphatic, aromatic, alkylaromatic hydrocarbon resins,
  • Hydrocarbon resins based on pure monomers, hydrogenated hydrocarbon resins, functional hydrocarbon resins and natural resins.
  • the presentation of the state of knowledge in the "Handbook of Pressure Sensitive Adhesive Technology" by Donatas Satas (van Nostrand, 1989) is expressly pointed out.
  • plasticizers plasticizers
  • other fillers such as, for example, fibers, carbon black, zinc oxide, chalk, solid or hollow glass spheres, microspheres other materials, silicic acid, silicates
  • nucleating agents electrically conductive materials such as conjugated polymers, doped conjugated polymers, metal pigments, metal particles, metal salts, graphite, etc.
  • blowing agents compounding agents and / or anti-aging agents, for example in the form of primary and secondary antioxidants or added in the form of sunscreens.
  • such additives may be added only in amounts that do not affect the reflection of the metallic layer.
  • the pressure-sensitive adhesives (b) and (b ') differ only in the black particle additive.
  • the pressure-sensitive adhesive (b 1 ) preferably contains between 2 and 30% by weight of carbon black, more preferably between 5 and 20% by weight of carbon black and most preferably between 8 and 15% by weight of carbon black.
  • the soot has a light-absorbing function.
  • Pigment blacks have proven to be outstandingly suitable.
  • carbon black powders from Degussa are used. These are commercially available under the trade name Printex TM. For better dispersibility into the PSA it is particularly preferred to use oxidatively after-treated blacks.
  • the pressure-sensitive adhesive (c 1 ) may be advantageous for the pressure-sensitive adhesive (c 1 ) if, in addition to carbon black, color pigments are added.
  • color pigments for example, blue pigments such as aniline black BS890 from Degussa are suitable as additives.
  • matting agents can be used as additives.
  • the pressure-sensitive adhesive (c) and (c 1 ) differ not only in the black particle addition, but also in their chemical composition.
  • different polyacrylates can be used as base material, which differ in the comonomers and / or in the additization.
  • the layer (c 1 ) for example, natural rubber or synthetic rubber adhesives, and to combine these with a transparent acrylate PSA (c).
  • the pressure-sensitive adhesive (c 1 ) also preferably contains between 2 and 30% by weight of carbon black, more preferably between 5 and 20% by weight of carbon black and most preferably between 8 and 15% by weight of carbon black.
  • the special carbon blacks and / or color pigments mentioned in the preceding section are also very advantageous here.
  • crosslinkers and promoters can be admixed with the PSAs (c) and / or (c 1 ) for crosslinking.
  • Suitable crosslinkers for electron beam crosslinking and UV crosslinking are, for example, difunctional or polyfunctional acrylates, difunctional or polyfunctional isocyanates (also in blocked form) or difunctional or polyfunctional epoxides.
  • thermally activatable crosslinkers such as, for example, Lewis acid, metal chelates or multifunctional isocyanates.
  • UV-absorbing photoinitiators which are very useful are benzoin ethers, such as benzoin ethers.
  • 2-methoxy-2-hydroxypropiophenone aromatic sulfonyl chlorides, such as.
  • 2-naphthyl sulfonyl chloride and photoactive oximes, such as.
  • the above-mentioned and other usable photoinitiators and others of the Norrish-I or Norrish-II type may advantageously contain the following radicals: benzophenone, acetophenone, benzil, benzoin, hydroxyalkylphenone, phenylcyclohexylketone, anthraquinone, trimethylbenzoylphosphine oxide, methylthiophenylmorpholine ketone , Aminoketone, azobenzoin, thioxanthone, hexarylbisimidazole, triazine, or fluorenone, each of which may be additionally substituted with one or more halogen atoms and / or one or more alkoxy groups and / or one or more amino groups or hydroxy groups.
  • the monomers are advantageously chosen such that the resulting polymers can be used as PSAs at room temperature or higher temperatures, in particular in such a way that the resulting polymers have pressure-sensitive adhesive properties corresponding to "Handbook of Pressure Sensitive Adhesive Technology "by Donatas Satas (van Nostrand, New York 1989).
  • T G of the polymers of T G ⁇ 25 0 C in accordance with the above the monomers predicted very preferably selected, and the quantitative composition of the monomer mixture advantageously chosen such that analogue according to an equation (G1) to the Fox Equation (G1) (see TG Fox, Bull. Am. Phys Soc., 1 (1956) 123) gives the desired T G value for the polymer.
  • n the number of runs via the monomers used
  • W n the mass fraction of the respective monomer n (wt .-%)
  • T G n the respective glass transition temperature of the homopolymer of the respective monomers n in K.
  • radical sources are peroxides, hydroperoxides and azo compounds
  • typical free-radical initiators are potassium peroxodisulfate, dibenzoyl peroxide, cumene hydroperoxide, cyclohexanone peroxide, di-t-butyl peroxide, Azodiisoklarebutyronitril, Cyclohexylsulfonylacetylperoxid, diisopropyl percarbonate, t-butyl peroctoate, Benzpinacol.
  • 1, 1'-azobis cyclohexanecarboxylic acid nitrile
  • Vazo 88 TM from DuPont
  • AIBN azodisobutyronitrile
  • the average molecular weights M.sub.w of the PSAs produced in the free-radical polymerization are very preferably selected such that they are in one Range from 200,000 to 4,000,000 g / mol; In particular, pressure-sensitive adhesives having average molecular weights M w of 400,000 to 1,400,000 g / mol are produced.
  • the determination of the average molecular weight is carried out by size exclusion chromatography (GPC) or matrix-assisted laser desorption / ionization mass spectrometry (MALDI-MS).
  • the polymerization may be carried out neat, in the presence of one or more organic solvents, in the presence of water or in mixtures of organic solvents and water.
  • Suitable organic solvents are pure alkanes (eg hexane, heptane, octane, isooctane), aromatic hydrocarbons (eg benzene, toluene, xylene), esters (eg ethyl acetate, propyl, butyl or hexyl acetate), halogenated hydrocarbons (eg chlorobenzene) , Alkanols (eg methanol, ethanol, ethylene glycol,
  • Ethylene glycol monomethyl ether Ethylene glycol monomethyl ether
  • ethers e.g., diethyl ether, dibutyl ether
  • the aqueous polymerization reactions can be treated with a water-miscible or hydrophilic cosolvent to ensure that the reaction mixture is in the form of a homogeneous phase during the monomer conversion.
  • cosolvents for the present invention are selected from the following group consisting of aliphatic alcohols, glycols, ethers, glycol ethers, pyrrolidines, N-alkylpyrrolidinones, N-alkylpyrrolidones, polyethylene glycols, polypropylene glycols, amides, carboxylic acids and salts thereof, esters, organosulfides, Sulfoxides, sulfones, alcohol derivatives, hydroxy ether derivatives, aminoalcohols, ketones and the like, as well as derivatives and mixtures thereof.
  • the polymerization time is - depending on the conversion and temperature - between 2 and 72 hours.
  • the entry of heat is essential for the thermally decomposing initiators.
  • the polymerization can be initiated for the thermally decomposing initiators by heating to 50 to 160 ° C., depending on the type of initiator.
  • the recuperymerisationstechnik is suitable here.
  • the polymerization is initiated with UV light, but only to a low conversion about 10 - 30% out.
  • this polymer syrup for example, be shrink-wrapped in films (in the simplest case, ice cubes) and then polymerized in water to high conversion.
  • These pellets can then be used as acrylate hotmelt adhesive, with film materials which are compatible with the polyacrilate being particularly preferably used for the melting process.
  • the thermally conductive material additives can be added before or after the polymerization.
  • poly (meth) acrylate pressure-sensitive adhesive compositions is anionic polymerization.
  • inert solvents are preferably used as the reaction medium, e.g. aliphatic and cycloaliphatic hydrocarbons, or aromatic hydrocarbons.
  • the living polymer in this case is generally represented by the structure P L (A) -Me, where Me is a Group I metal, such as lithium, sodium or potassium, and P L (A) is a growing polymer of the acrylate monomers ,
  • the molecular weight of the polymer to be prepared is controlled by the ratio of initiator concentration to monomer concentration.
  • Suitable polymerization initiators are, for example, n-propyllithium, n-butyllithium, sec-butyllithium, 2-naphthyllithium, cyclohexyl lithium or octyllithium, although this list is not exhaustive.
  • initiators based on samarium complexes for the polymerization of acrylates are known (Macromolecules, 1995, 28, 7886) and can be used here.
  • difunctional initiators for example 1,1,1,4,4-tetraphenyl-1,4-dilithiobutane or 1,1,1,4,4-tetraphenyl-1,4-dilithioisobutane.
  • Co-initiators can also be used. Suitable coinitiators include lithium halides, alkali metal alkoxides or alkylaluminum compounds.
  • the ligands and coinitiators are chosen so that acrylate monomers, such as n-butyl acrylate and 2-ethylhexyl acrylate, can be polymerized directly and need not be generated in the polymer by transesterification with the corresponding alcohol.
  • controlled radical polymerization methods are also suitable.
  • a control reagent of the general formula is then preferably used:
  • R and R 1 are independently selected or the same and
  • Ci 8 -alkyl radicals C 3 to C 8 alkenyl radicals; C 3 to Cis alkynyl radicals;
  • C 2 -C 8 -Hetero-alkyl radicals having at least one O atom and / or an NR * group in the carbon chain, where R * may be any (especially organic) radical having at least one ester group, amine group, carbonate group, cyano group , Isocyano group and / or epoxy group and / or sulfur-substituted C r Cis-alkyl radicals, C 3 -C 8 -alkenyl radicals, C 3 -C 8 -alkynyl radicals;
  • Control reagents of type (I) preferably consist of the following compounds: halogen atoms are in this case preferably F, Cl, Br or I, more preferably Cl and Br. Suitable alkyl, alkenyl and alkynyl radicals in the various substituents are both linear and branched chains.
  • alkyl radicals containing 1 to 18 carbon atoms are methyl, ethyl, propyl, isopropyl, butyl, isobutyl, t-butyl, pentyl, 2-pentyl, hexyl, heptyl, octyl, 2 Ethylhexyl, t-octyl, nonyl, decyl, undecyl, tridecyl, tetradecyl, hexadecyl and
  • alkenyl radicals having 3 to 18 carbon atoms are propenyl, 2-butenyl, 3
  • alkynyl of 3 to 18 carbon atoms examples include propynyl, 2-butynyl, 3-butynyl, n-2-octynyl and n-2-octadecynyl.
  • hydroxy-substituted alkyl radicals are hydroxypropyl, hydroxybutyl or
  • halogen-substituted alkyl radicals are dichlorobutyl, monobromobutyl or
  • Carbon chain is, for example, -CH 2 -CH 2 -O-CH 2 -CH 3 .
  • C 3 -C 2 cycloalkyl radicals for example, cyclopropyl, cyclopentyl, cyclohexyl or trimethylcyclohexyl serve.
  • C 6 -C 8 -aryl radicals serve, for example, phenyl, naphthyl, benzyl, 4-tert-butylbenzyl or other substituted phenyl, such as ethyl, toluene, xylene, mesitylene, isopropylbenzene,
  • R 2 can also be selected independently of R and R 1 from the above-mentioned group for these radicals.
  • polymerisation is usually carried out only to low conversions (WO 98/01478 A1) in order to realize the narrowest possible molecular weight distributions. Due to the low conversions, however, these polymers can not be used as pressure-sensitive adhesives and in particular not as hotmelt PSAs, since the high proportion of residual monomers adversely affects the adhesive properties, the residual monomers in the concentration process contaminate the solvent recycled and the corresponding self-adhesive tapes show a very high outgassing behavior. In order to avoid this disadvantage of lower conversions, in a particularly preferred procedure the polymerization is initiated several times.
  • nitroxide-controlled polymerizations can be carried out.
  • radical stabilization nitroxides of the type (Va) or (Vb) are used in a favorable procedure:
  • R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 independently represent the following compounds or atoms: i) halides, such as chlorine, bromine or iodine ii) linear, branched, cyclic and heterocyclic hydrocarbons having 1 to
  • Compounds of (Va) or (Vb) may also be bound to polymer chains of any kind (primarily in the sense that at least one of the above radicals represents such a polymer chain) and thus be used for the construction of polyacrylate PSAs. More preferably, controlled regulators are chosen for the polymerization of compounds of the type:
  • TEMPO 2,2,6,6-tetramethyl-piperidine-i-oxyl
  • 4-benzoyloxy-TEMPO 4-methoxy-TEMPO
  • 4-chloro-TEMPO 4-hydroxy-TEMPO
  • 4-oxo-TEMPO 4-amino-TEMPO, 2,2,6,6-i -Tetraethyl -piperidinyloxyl, J 2 2,6-trimethyl-6-ethyl-1 -piperidinyloxyl
  • No. 4,581,429 A discloses a controlled radical polymerization process which uses as initiator a compound of the formula R'R "N-O-Y, wherein Y is a free radical species capable of polymerizing unsaturated monomers, but the reactions generally have low conversions WO 98/13392 A1 describes open-chain alkoxyamine compounds which have a symmetrical substitution pattern EP 735 052 A1 discloses a process for the preparation of thermoplastic elastomers having narrow molecular weight distributions 96/24620 A1 describes a polymerization process in which very specific free-radical compounds, for example phosphorus-containing nitroxides based on imidazolidine, are used, WO 98/44008 A1 discloses specific nitroxyls which are based on morpholines, piperazinones and piperazinediones 352 A1 describes heterocyclic Al koxyamine as regulators in controlled radical Polymerizations.
  • ATRP polyacrylate PSA atom transfer radical polymerization
  • initiator preferably monofunctional or difunctional secondary or tertiary halides and for the abstraction of the (r) halide (s) Cu, Ni , Fe, Pd, Pt, Ru, Os, Rh, Co, Ir, Ag or Au complexes (EP 0 824 111 A1, EP 826 698 A1, EP 824 110 A1, EP 841 346 A1, EP 850 957 A1).
  • the PSA is coated from solution onto the carrier material in a preferred procedure.
  • layers (a) and / or (b) can optionally be pretreated.
  • pretreated with corona or with plasma it can be applied from the melt or from solution, a primer or it can be chemically etched.
  • heat is applied via e.g. in a drying channel, the solvent is removed and optionally initiated the crosslinking reaction.
  • the polymers described above can furthermore also be coated as hotmelt systems (ie from the melt). For the production process, it may therefore be necessary to remove the solvent from the PSA.
  • a very preferred method is concentration over a single or twin screw extruder.
  • the twin-screw extruder can be operated in the same direction or in opposite directions.
  • the solvent or water is preferably distilled off over several vacuum stages. In addition, depending on the distillation temperature of the solvent against heated.
  • the residual solvent contents are preferably ⁇ 1%, more preferably ⁇ 0.5% and very preferably ⁇ 0.2%.
  • twin-screw extruder can also be used for compounding with the carbon black.
  • the carbon black can be distributed very finely distributed in the pressure-sensitive adhesive matrix.
  • the hotmelt is very preferably processed from the melt.
  • the PSAs are coated by a roll coating process. Different roll coating processes are described in the Handbook of Pressure Sensitive Adhesive Technology by Donatas Satas (van Nostrand, New York 1989), in another embodiment a melt die is coated, in another preferred process extrusion is applied
  • the extrusion dies used can advantageously come from one of the following three categories: T-die, fish-tail die and stirrup nozzle The individual types differ in the shape of their flow channel Orientation experienced.
  • crosslinking is effected with electron and / or UV radiation.
  • UV crosslinking is irradiated by short-wave ultraviolet irradiation in a wavelength range of 200 to 400 nm, depending on the UV photoinitiator used, in particular using high-pressure or medium-pressure mercury lamps at a power of 80 to 240 W / cm ,
  • the irradiation intensity is adapted to the respective quantum yield of the UV photoinitiator and the degree of crosslinking to be set.
  • Typical irradiation devices that can be used are linear cathode systems, scanner systems or segmented cathode systems, if it is an electron beam accelerator.
  • the typical acceleration voltages are in the range between 50 kV and 500 kV, preferably 80 kV and 300 kV.
  • the applied waste cans range between 5 to 150 kGy, in particular between 20 and 100 kGy.
  • the film layer (a) is coated on one or both sides with a metal, e.g. steamed with aluminum or silver.
  • a metal e.g. steamed with aluminum or silver.
  • the sputtering process should be controlled so that the aluminum or silver is applied very evenly.
  • the plasma-pretreated PET film is steamed on one side or on both sides with aluminum in one working step.
  • the invention further relates to the use of the inventive double-sided pressure-sensitive adhesive tapes for bonding or producing optical liquid-crystal data displays (LCDs), the use for bonding LCD glasses and liquid-crystal data displays and devices with liquid-crystal data displays which comprise a pressure-sensitive adhesive tape according to the invention in its product structure exhibit.
  • the double-sided pressure-sensitive adhesive tapes may be covered with one or two release films and / or release papers.
  • the transmission was measured in the wavelength range from 190 to 900 nm using a Uvikon 923 from the company Biotek Kontron.
  • the Absolute Transmission is given as the value at 550 nm in%.
  • a commercially very strong light source for example overhead projector type Liesegangtrainer 400 KC type 649, halogen lamp 36 V, 400 W
  • This mask contains in the middle a circular opening with a diameter of 5 cm.
  • the double-sided LCD tape is placed on this circular opening. In fully darkened surroundings, the number of pinholes is then counted electronically or visually. These are recognizable as translucent dots when the light source is switched on.
  • a 200 L reactor conventional for radical polymerizations was charged with 2400 g of acrylic acid, 64 kg of 2-ethylhexyl acrylate, 6.4 kg of N-isopropylacrylamide and 53.3 kg of acetone / isopropanol (95: 5). After 45 minutes, passing nitrogen gas while stirring, the reactor was heated to 58 0 C and added 40 g of 2,2 1 -Azoisobutter Aciditril (AIBN). Subsequently, the outer heating bath was heated to 75 ° C and the reaction was carried out constantly at this external temperature. After 1 h reaction time again 40 g of AIBN was added.
  • AIBN 2,2 1 -Azoisobutter Acid
  • Soot mass 1 In a drum, polymer 1 is diluted with petroleum spirit to a solids content of 30%. Subsequently, with vigorous stirring, 8% by weight of carbon black (Printex TM 25, Degussa AG), based on the polymer 1, is mixed in. For homogenization, the solution is homogenized for 10 minutes with an Ultratrurrax.
  • carbon black Printex TM 25, Degussa AG
  • polymer 1 In a drum, polymer 1 is diluted with petroleum spirit to a solids content of 30%. Subsequently, with vigorous stirring, 10% by weight of carbon black (Printex TM 25, Degussa AG), based on the polymer 1, is mixed in. For homogenization, the solution is homogenized for 10 minutes with an Ultratrurrax.
  • carbon black Printex TM 25, Degussa AG
  • polymer 1 In a drum, polymer 1 is diluted with petroleum spirit to a solids content of 30%. Subsequently, with vigorous stirring, 12% by weight of carbon black (Printex TM 25, Degussa AG), based on the polymer 1, is mixed in. For homogenization, the solution is homogenized for 10 minutes with an Ultraturrax.
  • carbon black Printex TM 25, Degussa AG
  • the carbon blacks and the polymer 1 were coated from solution onto a siliconized release paper (PE-coated release paper from Loparex), dried for 10 minutes in an oven at 100 ° C. and then crosslinked at a dose of 25 kGy at an acceleration voltage of 200 kV.
  • the mass application was in each case 50 g / m 2 .
  • a commercially available 12 ⁇ m PET film from Mitsubishi RNK 12 ⁇ m was aluminum-coated on one side until a full-surface aluminum layer had been applied to one side.
  • the film was vapor-deposited at a width of 300 mm by the sputtering method.
  • positively charged, ionized argon gas is fed into a high-vacuum chamber.
  • the charged ions then strike a negatively charged Al plate and dissolve aluminum particles at the molecular level, which then deposit on the polyester film passed over the plate.
  • Foil 3 AI vaporization
  • a standard 12 ⁇ m PET film from Mitsubishi RNK 12 ⁇ m was coated with aluminum on both sides until a full-surface aluminum layer had been applied on both sides.
  • the film was vapor-deposited in a width of 300 mm by the sputtering process (compare film 2 to this process).
  • the film 1 was coated in the laminating with the polymer 1 on one side and with the soot mass 1 on the other side with 50 g / m 2 .
  • the film 1 was coated in the lamination process with the polymer 1 on one side and with the soot mass 2 on the other side with 50 g / m 2 .
  • the film 1 is coated in the lamination process, with the polymer 1 on one side and with the soot mass 3 on the other side with 50 g / m 2 .
  • the film 2 is coated in the laminating with the soot mass 1 on both sides with 50 g / m 2 .
  • the film 2 is coated in the laminating with the soot mass 2 on both sides with 50 g / m 2 .
  • the film 2 is in Kaschiertechnische with the soot mass 3 on both sides with 50 g / m 2 coated.
  • the film 3 is coated in the laminating with the soot mass 1 on both sides with 50 g / m 2 .
  • the film 3 is coated in the laminating with the soot mass 2 on both sides with 50 g / m 2 .
  • the film 3 is coated in Kaschiertechnische with the soot mass 3 on both sides with 50 g / m 2 .

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  • Nonlinear Science (AREA)
  • Organic Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Adhesive Tapes (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Liquid Crystal (AREA)

Abstract

L'invention concerne un ruban auto-adhésif, notamment pour réaliser ou coller des affichages de données optiques à cristaux liquides (LCD), le ruban comprenant une face supérieure et une face inférieure, ainsi qu'une feuille support (a) dotée d'une face supérieure et d'une face inférieure. Ce ruban auto-adhésif comporte une couche auto-adhésive (b, b' ) à la fois sur sa face supérieure et sur sa face inférieure, cette couche auto-adhésive étant colorée en noir au moins sur une face du ruban auto-adhésif.
EP05818900A 2004-12-02 2005-12-02 Rubans auto-adhesifs doubles faces absorbant la lumiere pour realiser ou coller des affichages a cristaux liquides Withdrawn EP1820058A1 (fr)

Applications Claiming Priority (2)

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DE102004058280A DE102004058280A1 (de) 2004-12-02 2004-12-02 Doppelseitige Haftklebebänder zur Herstellung bzw. Verklebung von LC-Displays mit lichtabsorbierenden Eigenschaften
PCT/EP2005/056400 WO2006058914A1 (fr) 2004-12-02 2005-12-02 Rubans auto-adhesifs doubles faces absorbant la lumiere pour realiser ou coller des affichages a cristaux liquides

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KR101432049B1 (ko) * 2012-09-13 2014-08-21 대원케미칼(주) 디스플레이 원도우용 양면점착테이프
JP5942725B2 (ja) * 2012-09-18 2016-06-29 デクセリアルズ株式会社 導電性シート
DE102013011074A1 (de) 2013-07-03 2015-01-08 Oerlikon Trading Ag An eine indirekte Kühlvorrichtung angepasstes Target mit Kühlplatte
CN105295761A (zh) * 2015-10-23 2016-02-03 浙江欧仁新材料有限公司 一种超薄双面胶
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FR2757865B1 (fr) * 1996-12-26 1999-04-02 Atochem Elf Sa Procede de polymerisation ou copolymerisation radicalaire controlee de monomeres (meth)acryliques, vinyliques, vinylideniques et dieniques et (co)polymeres obtenus
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DE102004058280A1 (de) 2006-06-08
DE112005002880A5 (de) 2007-10-18
JP2008521992A (ja) 2008-06-26
US20090123744A1 (en) 2009-05-14
WO2006058914A1 (fr) 2006-06-08

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