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WO2009027536A1 - Profilé en plastique doté d'une surface à activité photocatalytique - Google Patents

Profilé en plastique doté d'une surface à activité photocatalytique Download PDF

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Publication number
WO2009027536A1
WO2009027536A1 PCT/EP2008/061472 EP2008061472W WO2009027536A1 WO 2009027536 A1 WO2009027536 A1 WO 2009027536A1 EP 2008061472 W EP2008061472 W EP 2008061472W WO 2009027536 A1 WO2009027536 A1 WO 2009027536A1
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WO
WIPO (PCT)
Prior art keywords
plastic profile
cover layer
profile according
photocatalytically active
metal oxide
Prior art date
Application number
PCT/EP2008/061472
Other languages
German (de)
English (en)
Inventor
Frank Suthoff
Rudolf Heitzmann
Bernd Rung
Original Assignee
Profine Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Profine Gmbh filed Critical Profine Gmbh
Publication of WO2009027536A1 publication Critical patent/WO2009027536A1/fr

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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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • 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
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • 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
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • 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
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/30—Coverings, e.g. protecting against weather, for decorative purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/154—Coating solid articles, i.e. non-hollow articles
    • B29C48/155—Partial coating thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/06—PVC, i.e. polyvinylchloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/001—Profiled members, e.g. beams, sections
    • B29L2031/003—Profiled members, e.g. beams, sections having a profiled transverse cross-section
    • B29L2031/005—Profiled members, e.g. beams, sections having a profiled transverse cross-section for making window frames
    • 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
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/102—Oxide or hydroxide
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/414—Translucent
    • 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
    • B32B2307/754—Self-cleaning
    • 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
    • B32B2419/00—Buildings or parts thereof
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04—Homopolymers or copolymers of esters
    • C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
    • C08L33/10—Homopolymers or copolymers of methacrylic acid esters
    • C08L33/12—Homopolymers or copolymers of methyl methacrylate

Definitions

  • the present invention relates to a plastic profile with a photocatalytically active surface, comprising an extruded base body based on PVC-U and a covering layer directly or indirectly bonded to the base body based on an organic polymer.
  • the invention relates to PVC-U hollow wall profiles used in the manufacture of windows and doors.
  • Windows and doors are made to a large extent of extruded plastic profiles, in particular of rigid PVC (PVC-U).
  • PVC-U rigid PVC
  • profile sections cut in the miter area are welded together for the frame and wing mitred sections.
  • the photocatalytic properties of TiC ⁇ particles have long been known and studied extensively in the literature.
  • the photocatalytic effect is based on a semiconductor property of the TiC> 2, wherein a hole-electron pair is formed by a quantum of light, which has a relatively long recombination time.
  • a hole-electron pair is formed by a quantum of light, which has a relatively long recombination time.
  • the oxidation potential of more than 3 eV is so high that practically all organic substances that come into contact with such TiO 2 particles are oxidized.
  • TiO 2 is predominantly used in the Anatase configuration and primary particle sizes in the nanoscale range, ie with primary particle sizes below 100 nm used.
  • TiO 2 is widely used for the pigmentation of PVC-U.
  • the TiO 2 pigments have almost exclusively the rutile crystallite form of the TiO 2.
  • rutile has a lower photocatalytic activity compared to the anatase configuration
  • TiCi pigments for PVC must firstly be optimized with regard to their particle diameter-usually the average diameter is about 0.3 to 0.4 ⁇ m-and secondly
  • TiCi pigments are usually rendered inert by a thin coating of Al 2 O 3 and SiO 2 compounds or other metal oxides in order to avoid undesirable degradation of the PVC polymer by photocatalytic effects.
  • DE 102 248 95 A1 discloses a self-cleaning plastic body with a plastic substrate which initially has a siloxane coating and an inorganic bonded photocatalytically active layer with TiO 2 particles.
  • the plastic substrate can also consist of PMMA (polymethyl methacrylate).
  • the inorganic coatings applied in this way have a relatively high scratch resistance, on the one hand the application of the two inorganic layers is complicated, on the other hand their durability is limited.
  • the 103 04 953 Al concerns scratch-resistant and self-cleaning plastic body, which are obtainable by one on one Plastic substrate applied and cured a siloxane coating, the polar portion of the surface energy of the cured siloxane coating to a value of at least 10 mN / m increases and then applying a photocatalytic active TiC ⁇ particle-containing coating and cured.
  • WO 2005/007286 A1 and EP 1 498 176 A1 disclose a generic PVC substrate which can also be used, for example, for window profiles with a photocatalytically active coating consisting of at least two wet-chemically produced inorganic layers with at least one first substrate applied to the substrate an underlayer comprising inorganic polymer and at least one second second top layer consisting of TiO 2 particles, wherein the underlayer contains less than 0.5% by weight of TiO 2 particles, is free of pores and has at least 5% by weight of ZrO 2.
  • a layer of PMMA may also be arranged between the PVC layer and the inorganic polymer layers.
  • the invention solves this problem by a plastic profile with an extruded base body based on PVC-U, wherein the extruded base body has a directly or indirectly connected to the base layer cover layer based on an organic polymer in which a photocatalytically active metal oxide is present homogeneously distributed ,
  • the organic polymer of the cover layer is preferably a thermoplastic.
  • the present invention thus turns away from the hitherto fundamentally adopted method of using photocatalytically active TiO 2 in inorganic, very thin coatings and separating them with an additional inorganic intermediate layer from the organic polymer of the substrate.
  • the invention takes into account the fact that the organic polymer of the top layer is slowly degraded at the surface.
  • the thickness of the cover layer based on the organic polymer is preferably 0.1 to 3 mm, in particular 0.15 to 0.6 mm. It is thus relatively thick in comparison to heretofore used inorganic coatings, so that the durability of the coatings according to the invention is sufficient for practical use even under high UV irradiation and usual atmospheric influences.
  • the photocatalytically active metal oxide can not be incorporated directly into PVC, since this is immediately degraded and darkened. It is preferred for the organic polymer of the cover layer, a halogen-free polymer used.
  • PMMA polymethyl methacrylate
  • the organic polymer of the cover layer consists at least predominantly of PMMA.
  • PMMA polymethyl methacrylate
  • the methyl methacrylate before the polymerization other acrylates eg. For example, butyl acrylate, are added, in which case the corresponding copolymers of methyl methacrylate arise.
  • PMMA is used in this application, this includes in addition to polymethyl methacrylate also the corresponding copolymers of methyl methacrylate or mixtures of polymethyl methacrylate with these copolymers.
  • Suitable photocatalytically active metal oxides are the metal oxides known from the prior art, in particular TiO 2 in the anatase configuration.
  • the primary particles of these TiO 2 TiO 2 nanoparticles in particular have average dimensions ⁇ 50 nm, but can also be used as agglomerates of such small primary particles. In principle, all photocatalytically active metal oxides or mixtures thereof can be used.
  • the preferred TiC 2 nanoparticles are available commercially as Kronos uvlp 7500 and vlp 7000 from Kronos International, Inc., for example.
  • the vlp 7000 type is photocatalytically active even when exposed to visible light.
  • the photocatalytically active metal oxides are preferably used in amounts of from 0.05 to 10% by weight, in particular from 0.1 to 5% by weight, particularly preferably up to 1.5% by weight, based in each case on the polymer content of the top layer.
  • the coextruded PMMA cover layer preferably has an average thickness of 0.1 to 3 mm, in particular 0.15 to 0.6 mm, in which the photocatalytically active metal oxide is homogeneously distributed.
  • the thickness of this cover layer should be rather higher at higher concentrations of photocatalytically active metal oxide in the cover layer, while at lower concentrations of photocatalytically active Metal oxide in the cover layer, the thickness of this cover layer can be selected thinner.
  • the ratio of the concentration of photocatalytically active metal oxide in the cover layer to the thickness of this cover layer is preferably less than 4% / mm, preferably ⁇ 2% / mm, particularly preferably ⁇ 1% / mm.
  • the cover layer according to the invention can in principle - if no pigments are used - be transparent or translucent, since the nanoparticles used due to their small dimensions, the incident visible light little or no break or reflect.
  • the cover layer according to the invention is preferably provided with additional color pigments and / or UV absorbers.
  • the topcoat contains 1 to 6 wt .-% of color pigments, with inorganic color pigments are preferred because organic color pigments are degraded, if necessary, of the photocatalytically active metal oxides.
  • the organic top layer particularly preferably contains TiO 2 as non-photocatalytically active UV absorber or white pigment as rutile in an inertized form having an average primary particle size> 0.1 ⁇ m, in particular with an average primary particle size of 0.2 to 0.4 ⁇ m.
  • TiO 2 pigments are the commercial products Kroonos 2220 and Kronos 2222 from Kronos International, Inc.
  • pigments or UV absorbers in the polymeric topcoat prevents larger amounts of UV Radiation penetrate into deeper layers of the cover layer, where they stimulate the photocatalytically active metal oxides and thereby accelerate degradation of the polymer.
  • the production of the profiles according to the invention is preferably carried out by a coextrusion method which is fundamentally known to the person skilled in the art, in which the PVC batch, usually in the form of a dry blend, is melted with a main extruder and fed to an extrusion tool. Parallel to this, a PMMA granulate is melted in a second extruder and passed through separate distribution channels in certain areas of the same tool. Immediately following the extrusion of the profile takes place in hollow chamber profiles familiar to the expert calibration.
  • a coextrusion method which is fundamentally known to the person skilled in the art, in which the PVC batch, usually in the form of a dry blend, is melted with a main extruder and fed to an extrusion tool. Parallel to this, a PMMA granulate is melted in a second extruder and passed through separate distribution channels in certain areas of the same tool. Immediately following the extrusion of the profile takes place in hollow chamber profiles familiar to the expert calibration.
  • the PMMA granules used for extrusion preferably already contains the fraction according to the invention of photocatalytically active metal oxide and pigments.
  • the preparation of these PMMA granules can be carried out, for example, in commercially available co-running twin-screw extruders (compounding extruders).
  • compounding extruders compounding extruders
  • various additives are added to the PMMA.
  • the additives can be added to the PMMA in the compounder extruder as powder, as agglomerate or granules or in liquid form, whereby gravimetric metering systems are often used because of the required accuracy.
  • the surface of the plastic profiles according to the invention is in common use of both a UV irradiation - in particular by sunlight - and the influence of moisture - especially by rain - suspended. Both factors are important for the "self-cleaning" and hydrophilizing character of the surface.
  • the coextruded profiles initially still have a low self-cleaning effect of the surface. It has surprisingly been found that by machining the surface, in particular by grinding, the self-cleaning and hydrophilizing action of the photocatalytically active metal oxides can be considerably increased. It is assumed that the photocatalytically active metal oxides are initially enveloped on the surface of PMMA polymer and thus virtually inerted. By grinding the photocatalytically active metal oxides are apparently exposed in sufficient quantities.
  • the catalytic activity can be demonstrated by bringing an aqueous solution of methylene blue into contact with the surface to be measured, exposing the solution in contact with the surface to be measured to UV light, and measuring the decrease in color of the solution over time becomes.
  • the cover layer is activated after the profile extrusion or after the surface layer has been sanded by UV exposure.
  • a slight discoloration of the top layer can be observed, which occurs only in the first intensive UV exposure.
  • Preferred field of application of the present invention is the extrusion of self-cleaning profiles for the production of windows and doors, in particular in the form of hollow chamber profiles.
  • the cover layer according to the invention based on an organic polymer, in particular of PMMA, preferably covers only partial areas of the profile surface, in particular the outside of the profiles exposed to the weather. It has turned out to be a particular advantage that such coextruded window or door profiles are readily mitred and welded together in the miter area can also be in the miter area, the PMMA cover layer is almost seamless and thus the self-cleaning effect is present in the miter area.
  • FIG. 1 shows a cross section through an inventive window profile (frame and casement).
  • FIG. 1 an inventive frame profile 1 and a corresponding sash profile 2 are shown in cross section. Seen from the contours, these are commercially available plastic profiles for the production of windows, as sold under the trade name Trocal, System Innonova M5, by the applicant. The profiles are produced in a manner known per se in the art by coextrusion with a white-colored PMMA layer.
  • the approach for the basic profile based on PVC-U contains in addition to the thermoplastic polymer PVC still conventional amounts of chalk, inertized TiO 2 as white pigment, type Kronos 2220, and a lead-free stabilization based on calcium-zinc.
  • the PMMA coatings 5, 6 coextruded with the PVC base profiles 3, 4 each have a thickness of 0.5 mm and were produced from the following formulation:
  • This approach for the PMMA coatings 5, 6 was first mixed in a concurrent twin-screw compounding extruder at a temperature of 240 0 C, homogenized and processed into granules.
  • the granules have a white color.
  • the PMMA surface is sanded by means of abrasive brushes.
  • the surfaces of the PMMA layers 5, 6 After a single activation of the photocatalytically active TiO 2 particles in the surface of the PMMA layer with UV irradiation (100 h with a VITALUX lamp), the surfaces of the PMMA layers 5, 6 have a markedly hydrophilic surface photocatalytic activity can be estimated over the lightening of an aqueous solution of methylene blue over time under UV irradiation.This results in an even higher photocatalytic effect of the PMMA-coated invention compared to commercially available photocatalytically coated glazings (type active glass, Pilkington) profiles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Catalysts (AREA)

Abstract

La présente invention a pour but d'améliorer les propriétés des profilés en plastique dits autonettoyants, en particulier les profilés de fenêtres. A cet effet, un corps de base extrudé à base de PVC-U est pourvu d'une couche de finition à base d'un polymère thermoplastique organique, reliée directement ou indirectement au corps de base. Ce polymère organique présente un oxyde métallique à activité photocatalytique, en particulier le TiO2, réparti de manière homogène. La couche de finition se compose notamment de PMMA et se caractérise par une épaisseur comprise entre 0,1 et 3 mm.
PCT/EP2008/061472 2007-08-31 2008-09-01 Profilé en plastique doté d'une surface à activité photocatalytique WO2009027536A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007000687.1 2007-08-31
DE102007000687 2007-08-31

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Publication Number Publication Date
WO2009027536A1 true WO2009027536A1 (fr) 2009-03-05

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DE202009017047U1 (de) * 2009-12-17 2011-05-05 Rehau Ag + Co. Titandioxidhaltige Zusammensetzung
EP2538011A1 (fr) * 2011-06-22 2012-12-26 profine GmbH Profil de chambre creux en PVC et la utilisation
CN102505909A (zh) * 2011-10-13 2012-06-20 铜陵中发三佳科技股份有限公司 一种wpc共挤免钢衬的门窗型材及生产方法
DE102012204445A1 (de) * 2012-03-20 2013-09-26 Profine Gmbh Lack zur Beschichtung von Riefen aufweisenden Kunststoffoberflächen
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