Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
  • B32B37/1284—Application of adhesive
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
  • B32B7/04—Interconnection of layers
  • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
  • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
  • C23C14/10—Glass or silica
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
  • B32B37/1207—Heat-activated adhesive
  • B32B2037/1215—Hot-melt adhesive
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
  • B32B2037/1253—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives curable adhesive
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2255/00—Coating on the layer surface
  • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2255/00—Coating on the layer surface
  • B32B2255/20—Inorganic coating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2255/00—Coating on the layer surface
  • B32B2255/26—Polymeric coating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/40—Properties of the layers or laminate having particular optical properties
  • B32B2307/412—Transparent
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
  • B32B2307/558—Impact strength, toughness
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/71—Resistive to light or to UV
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/712—Weather resistant
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/724—Permeability to gases, adsorption
  • B32B2307/7242—Non-permeable
  • B32B2307/7244—Oxygen barrier
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/724—Permeability to gases, adsorption
  • B32B2307/7242—Non-permeable
  • B32B2307/7246—Water vapor barrier
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2439/00—Containers; Receptacles
  • B32B2439/70—Food packaging
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2457/00—Electrical equipment
• • 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
  • Y10T156/10—Methods of surface bonding and/or assembly therefor
• • 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
  • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
  • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
  • Y10T428/264—Up to 3 mils
• • 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
  • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
  • Y10T428/269—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension including synthetic resin or polymer layer or component
• • 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
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31652—Of asbestos
  • Y10T428/31663—As siloxane, silicone or silane
• • 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
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31855—Of addition polymer from unsaturated monomers
  • Y10T428/31935—Ester, halide or nitrile of addition polymer

Definitions

• the invention relates to the production of a transparent, weather-resistant barrier film by lamination, extrusion lamination (adhesive, melt or Hotmeltkaschtechnik) or extrusion coating.
• a thin, inorganically coated, transparent film e.g., PET
• a weatherable, transparent film e.g, PMMA or PMMA polyolefin coextrudate.
• the inorganic oxide layer has the property of a high, transparent barrier to water vapor and oxygen, while the PMMA layer brings the weathering stability.
• Patent DE 38 42 796 A1 describes the preparation of a clear, impact-resistant acrylate-based molding composition, films and moldings produced therefrom, and a process for the preparation of the molding composition. These films have the advantage that they do not discolor and / or embrittle under heat and moisture. Furthermore, they avoid the so-called white fracture when impact or bending stress. These films are transparent and remain so even when exposed to heat and moisture, weathering and impact or bending stress.
• the processing of the molding material to said transparent, impact-resistant films is ideally carried out by extrusion of the melt through a slot die and smoothing on a roll mill.
• Such films are characterized by long-lasting clarity, insensitivity to heat and cold, weather resistance, low yellowing and embrittlement and low whiteness when kinking or folding and are therefore suitable for example as a window in tarpaulins, car covers or sails.
• Such films have a thickness of less than 1 mm, for example 0.02 to 0.5 mm.
• An important application is the formation of thin surface layers of z. B. 0.02 to 0.5 mm thickness on rigid, dimensionally stable bodies, such as sheets, cardboard, chipboard, plastic plates and the like.
• Various processes are available for the production of such coatings.
• the film can be extruded into a molding compound, smoothed and laminated onto the substrate.
• extrusion coating allows an extruded strand to be applied to the surface of the substrate and smoothed by a roller. If a thermoplastic material serves as the substrate itself, there is the possibility of coextrusion of both compositions to form a surface layer of the clear molding composition of the invention.
• PMMA films offer only insufficient barrier properties to water vapor and oxygen, which is necessary for medical applications, applications in the packaging industry, but especially in electrical applications used outdoors.
• This inorganic oxide film (SiO x or AIO x ) is obtained by the vacuum deposition method (chemical, JP-A-10025357, JP-A-07074378, thermal or electron beam evaporation, sputtering, EP 1 018 166 B1, JP 2000-307136 A, WO 2005-029601 A2) applied.
• EP 1018166 B1 shows that the UV absorption of the SiO x layer can be influenced via the ratio of silicon to oxygen of the SiO x layer. This is important to underneath Laying layers to protect against UV radiation.
• the disadvantage is that as the ratio of silicon to oxygen changes, the barrier property also changes. Thus transparency and barrier can not be varied independently of each other.
• the inorganic oxide layer is sometimes applied mainly to polyesters and polyolefins because these materials withstand the temperature stress during the evaporation process.
• the inorganic oxide layer adheres well to polyesters and polyolefins, the latter undergoing corona treatment prior to coating.
• these materials are not weather-stable, they are often laminated with halogenated films, as described, for example, in WO 94/29106.
• halogenated films are problematic for environmental reasons.
• the Applicant uses varnishes which adhere well to PMMA under the name "antigrafitti coating” (DE 102007007999 A1)
• the antigraffiti effect is achieved by a fluorinated methacrylate
• These coatings can have excellent adhesion if the fluorinated component is replaced by a siloxane-containing component bring to SiO x layers.
• the advantage of these coatings is that they have excellent long-term stability in outdoor weathering. task
• the object of the invention is to provide a barrier film which is stable to weathering and highly transparent (> 80% in the wavelength range> 300 nm), whereby high barrier properties to water vapor and oxygen are ensured.
• PMMA fulfills the property of weathering stability
• the inorganic oxide layer fulfills the properties of the barrier.
• the present invention has the object of combining PMMA as a carrier layer with an inorganic oxide layer.
• the function of protection against UV radiation should no longer be borne by the inorganic oxide layer, so that it can be optimized exclusively by optical criteria, but by the PMMA layer.
• a partial discharge voltage of greater than 1000 V is to be achieved by this material combination.
• a barrier film which is weather-resistant.
• the properties are achieved by a multilayer film, wherein the individual layers are combined by vacuum deposition, lamination, extrusion lamination (adhesive, melt or Hotmeltkaschtechnik) or extrusion coating.
• a polyester or polyolefin film is coated with the inorganic layer and this laminated with PMMA or extrusion-laminated.
• the PMMA layer protects the polyester or polyolefin film from the effects of the weather.
• the adhesion between the inorganic layer and the PMMA layer is achieved by a Acrylate-based adhesion promoter prepared which is UV-curable and contains siloxane groups. The use of a hot melt adhesive is also possible.
• the PMMA layer also contains a UV absorber that protects the polyester or polyolefin film from UV radiation. The UV absorber can also be present in the polyolefin layer.
• a coextrudate of PMMA and polyolefin can be used, which brings cost advantages, since polyolefins are more favorable than PMMA.
• the barrier film according to the invention is weather-stable.
• the barrier film according to the invention is halogen-free.
• the barrier film according to the invention has a high barrier to water vapor and oxygen ( ⁇ 0.1 g / (m 2 d)).
• the barrier film according to the invention protects underlying layers from UV radiation, independently of the composition of the SiO x layer.
• the barrier film according to the invention can be produced cost-effectively, since a thin film can be used for the discontinuous process of inorganic vacuum deposition.
• the protective layer is made of:
• films of preferably polymethylmethacrylate (PMMA) or impact-resistant PMMA (sz-PMMA) are used.
• Coextrudates of polymethacrylates and polyolefins or polyesters can also be used. Coextrudates of polypropylene and PMMA are preferred.
• a fluorinated, halogenated layer is possible, such.
• the protective layer has a thickness of 20 microns to 500 microns, preferably, the thickness is 50 microns to 400 microns and most preferably from 200 microns to 300 microns.
• sunscreen agents can be added to the carrier layer.
• Sunscreens are to be understood as UV absorbers, UV stabilizers and free-radical scavengers.
• Optional UV protectants are z.
• benzophenone whose substituents such as hydroxyl and / or alkoxy groups are usually in the 2- and / or 4-position. These include 2-hydroxy-4-n-octoxybenzophenone, 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2 ', 4,4'-tetrahydroxybenzophenone, 2,2'-dihydroxy-4, 4'-dimethoxybenzophenone, 2-hydroxy-4-methoxybenzophenone.
• substituted benzotriazoles are very suitable as UV protection additive, for which especially 2- (2-hydroxy-5-methylphenyl) -benzotriazole, 2- [2-hydroxy-3,5-di (alpha, alpha-dimethyl) benzyl) -phenyl] -benzotriazole, 2- (2-hydroxy-3,5-di-t-butylphenyl) -benzotriazole, 2- (2-hydroxy-3,5-dibutyl-5-methylphenyl) -5-chlorobenzotriazole, 2- (2-Hydroxy-3,5-di-t-butylphenyl) -5-chlorobenzthazole, 2- (2-hydroxy-3,5-di-t-amylphenyl) -benzotriazole, 2- (2-hydroxy-5 -t-butylphenyl) benzotriazole, 2- (2-hydroxy-3-sec-butyl-5-t-butylphenyl) benzotriazole and 2- (2-(
• a UV absorber of the class of 2- (2'-hydroxyphenyl) -1, 3,5-triazines such as, for example, phenol-2- (4,6-diphenyl-1,2,5-triazine) 2-xy) -5- (hexyloxy).
• UV protectants which can be used furthermore are 2-cyano-3,3-diphenylacrylic acid ethyl ester, 2-ethoxy-2'-ethyl-oxalic acid bisanilide, 2-ethoxy-5-t-butyl-2'-ethyl-oxalic acid bisanilide and substituted phenyl benzoate.
• the light stabilizers or UV protectants can be present as low molecular weight compounds, as indicated above, in the polymethacrylate compositions to be stabilized. But it can also UV-absorbing groups in the matrix polymer molecules covalently after copolymerization with polymerizable UV absorption compounds, such as. As acrylic, methacrylic or allyl derivatives of benzophenone or Benztriazolderivaten be bound.
• the proportion of UV protection agents is generally from 0.01 to 10% by weight, in particular from 0.01 to 5% by weight, in particular from 0.02 to 2 wt .-% based on the (meth) acrylate copolymer.
• radical scavengers / UV stabilizers are sterically hindered amines, which are known by the name HALS (Hindered Amine Light Stabilizer). They can be used for the inhibition of aging processes in paints and varnishes
• Plastics especially in polyolefin plastics (plastics, 74
• Piperid instickstoff both unsubstituted and be substituted with alkyl or acyl groups.
• the sterically hindered amines do not absorb in the UV range. They catch formed radicals, which the UV absorbers can not do.
• stabilizing HALS compounds which can also be used as mixtures are:
• UV-absorbers are, for example, Tinuvin ® 234, Tinuvin ® 360,
• the radical scavengers / UV stabilizers are used in the polymer blends according to the invention in amounts of from 0.01 to 15% by weight, in particular in amounts of from 0.02 to 10% by weight, in particular in amounts of from 0.02 to 5% by weight .-% based on the (meth) acrylate copolymer.
• the UV absorber is preferably in the PMMA layer, but it may be included in the polyolefin or polyester layer.
• the protective layer also has a sufficient layer thickness to ensure the partial discharge voltage of 1000 V. These are, depending on the thickness, for example PMMA from 250 microns. Partial discharge voltage is understood to mean the voltage at which an electrical discharge takes place, which partially bridges the insulation (see DIN EN 60664-1).
• the carrier layer used are films of preferably polyolefins (PE, PP) or polyesters (PET, PEN). Also, films of other polymers can be used (for example, polyamides or polylactic acid).
• the carrier layer has a thickness of 1 .mu.m to 100 .mu.m, preferably the thickness is 5 .mu.m to 50 .mu.m and most preferably 10 .mu.m to 30 .mu.m.
• the carrier layer has a transparency of more than 80%, preferably more than 85%, particularly preferably more than 90% in the wavelength range of> 300 nm, preferably 350 to 2000 nm, particularly preferably 380 to 800 nm.
• the barrier layer has a transparency of more than 80%, preferably more than 85%, particularly preferably more than 90% in the wavelength range of> 300 nm, preferably 350 to 2000 nm, particularly preferably 380 to 800 nm.
• the barrier layer is applied to the carrier layer and preferably consists of inorganic oxides, for example SiO x or AIO x .
• inorganic oxides for example SiO x or AIO x .
• other inorganic materials for example SiN, SiN x O y, ZrO, UO 2, ZnO, Fe x O y, transparent organometallic compounds
• SiO x layers are preferably layers with the ratio of silicon and oxygen of 1: 1 to 1: 2, more preferably 1: 1, 3 to 1: 1, 7 use.
• the layer thickness is 5-300 nm, preferably 10-100 nm, particularly preferably 20-80 nm.
• AIO x layers are preferably used layers with the ratio of aluminum and oxygen of 2: 3 use.
• the layer thickness is 5-300 nm, preferably 10-100 nm, particularly preferably 20-80 nm.
• the inorganic oxides can be applied by physical vacuum deposition (electron beam or thermal process), magnetron sputtering or chemical vapor deposition. Flame, plasma or corona pretreatment is also possible.
• the adhesive layer is the adhesive layer
• the adhesive layer lies between the protective layer and the barrier layer. It allows the adhesion between the two layers.
• the adhesive layer has a thickness of 1 to 100 ⁇ m, preferably 2 to 50 ⁇ m, particularly preferably 2 to 20 ⁇ m.
• the adhesive layer can be formed from a paint formulation which is subsequently cured. This is preferably done by UV radiation, but can also be done thermally.
• the adhesive layer contains 1-80% by weight of polyfunctional methacrylates or acrylates or mixtures thereof as the main component. Preference is given to polyfunctional acrylates, for. B. Hexandioldimethycrylat used. To increase flexibility, it is possible to add monofunctional acrylates or methacrylates, for example hydroxyethyl methacrylate or lauryl methacrylate.
• the Adhesive layer optionally a component which improves the adhesion to SiO x , for example siloxane-containing acrylates or methacrylates, for. B. methacryloxypropyltrimethoxysilane.
• the silanoxane-containing acrylates or methacrylates may be present at 0-48% by weight in the adhesive layer.
• the adhesive layer contains 0.1 to 10 wt .-%, preferably 0.5 to 5 wt .-%, particularly preferably 1 to 3% initiator, for. B. Irgacure ® 184 or lrgacure ® 651.
• the adhesive layer may contain as regulator also 0 - 10 wt .-%, preferably 0.1 - 10 wt .-%, particularly preferably 0.5 - 5% sulfur compounds.
• a variant is to replace part of the main component by 0-30% by weight of prepolymer.
• the adhesive component optionally contains 0-40 wt .-% of the usual additives for adhesives.
• the adhesive layer can also be formed from a hot melt adhesive. This may consist of polyamides, polyolefins, thermoplastic elastomers (polyester, polyurethane or copolyamide elastomers) or copolymers.
• the adhesive layer can be applied by roller coating in the lamination or by means of a die in the extrusion lamination or in the extrusion coating.
• This barrier film can be used in the packaging industry, display technology, organic photovoltaics, thin-film photovoltaics, crystalline silicon modules and organic LEDs. embodiments
• a carrier layer (4) eg PET
• a barrier layer (3) eg SiO x
• the protective layer (1) eg PMMA
• an adhesive layer (2) for the lamination for example, an adhesion promoter based on acrylate or methacrylate can be used. This can be applied by roller coating (roll or kiss coating)
• the protective layer (1) is characterized in that it contains a UV absorber.
• Vacuum coating (PVD, CVD) of the carrier layer (4)
• a carrier layer (4) eg PET
• a barrier layer (3) eg SiO x
• the protective layer (1) in the state of the melt for example PMMA-PP coextrudate
• the adhesion of the protective layer on the barrier layer by an adhesive layer (2), z. B. adhesion promoter on acrylate or methacrylate-based, or hot melt adhesive, z. B. on ethylene-acrylate copolymer-based improved.
• the protective layer (1) is characterized in that it contains a UV absorber and that it consists of two or three layers (PMMA and PP or PMMA, adhesion promoter or hot melt adhesive and PP).
• Vacuum coating (PVD, CVD) of the carrier layer (4)
• a carrier layer (4) (eg PET) is coated with a barrier layer (3) (eg SiO x ).
• the protective layer (1) eg PMMA or coextrudates of PMMA and polyolefins
• adhesive layer (2) for the lamination for example, a hot melt adhesive, for. B. on ethylene-acrylate copolymer-based, can be used. This melt adhesive is extruded by means of a nozzle in the state of the melt between the carrier layer (4) containing the barrier layer (3) and the protective layer (1).
• the protective layer (1) is characterized in that it contains a UV absorber.
• Vacuum coating (PVD, CVD) of the carrier layer (4)
• the measurement of the water vapor permeability of the film system is carried out according to ASTM F-1249 at 23 ° C / 85% rel. Humidity.
• the partial discharge voltage is measured according to DIN 61730-1 and IEC 60664-1 or DIN EN 60664-1.
• ETFE with a layer thickness of 50 ⁇ m has a water vapor permeability of 0.7 g / (m 2 d).
• a film according to the invention with a layer thickness of 50 ⁇ m for the carrier layer has a water vapor permeation rate between 0.01 and 0.1 g / (m 2 d) (see Example 1).
• Protective layer PMMA, layer thickness 50 ⁇ m, contains 1% UV absorber Tinuvin ® 234.
• Adhesive layer 62% Laromer UA 9048 V, 31% hexanediol dimethacrylate, 2%
• Barrier layer SiO 2 , 5 applied by electron beam vacuum evaporation,
• Carrier layer PET Mitsubishi Hostaphan RN12, layer thickness: 12 ⁇ m.
• Protective layer impact-resistant PMMA, layer thickness: 250 ⁇ m, contains 2% UV absorber
• Adhesive layer 62% Laromer UA 9048 V, 31% hexanediol diacrylate, 2%
• Barrier layer Al 2 O 3 , layer thickness 40 nm, applied by means of magnetron sputtering.
• Carrier layer PEN, layer thickness: 20 ⁇ m.
• Protective layer coextrudate of PMMA and impact-modified PMMA, layer thickness 150 microns, containing 1, 5% UV absorber Tinuvin ® 360th
• Adhesive layer 62% Ebecryl 244, 31% hexanediol diacrylate, 2%
• Barrier layer SiOi , 7 , layer thickness 80 nm, applied by means of magnetron sputtering.
• Carrier layer PET, layer thickness 23 ⁇ m.
• Protective layer coextrudate of impact-resistant PMMA (. Eg Plex 8943F), layer thickness 40 microns containing 1, 5% UV absorber, Tinuvin ® 360 and polyethylene (e.g., Dowlex SC 2108 G.), Layer thickness 200 microns.
• Adhesive Dupont Bynel 22 E 780 (ethylene-acrylate copolymer).
• Adhesive layer Dupont Bynel 22 E 780
• Barrier layer SiOi , 7 , layer thickness 80 nm, applied by electron beam vacuum evaporation.
• Carrier layer PET Mitsubishi Hostaphan RN75, layer thickness 75 ⁇ m.
• Protective layer coextrudate of impact-resistant PMMA and PP, the total layer thickness 280 microns, containing 1, 5% UV absorber Tinuvin ® 360. adhesion promoter between PMMA and PP: Bynel. Layer thickness PMMA-Bynel-PP: 210-30-30 ⁇ m LIST OF REFERENCE NUMBERS

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