WO2002038882A1 - Coloured ribbed plate made of polycarbonate with improved fire protection resistance - Google Patents

Coloured ribbed plate made of polycarbonate with improved fire protection resistance Download PDF

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Publication number
WO2002038882A1
WO2002038882A1 PCT/EP2001/012627 EP0112627W WO0238882A1 WO 2002038882 A1 WO2002038882 A1 WO 2002038882A1 EP 0112627 W EP0112627 W EP 0112627W WO 0238882 A1 WO0238882 A1 WO 0238882A1
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Prior art keywords
polycarbonate
thickness
double
pigment
wall plate
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PCT/EP2001/012627
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German (de)
French (fr)
Inventor
Martin Berkenkopf
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Makroform Gmbh
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Publication date
Application filed by Makroform Gmbh filed Critical Makroform Gmbh
Priority to AU2002214036A priority Critical patent/AU2002214036A1/en
Priority to EP01982453A priority patent/EP1336014A1/en
Publication of WO2002038882A1 publication Critical patent/WO2002038882A1/en

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/54—Slab-like translucent elements
    • E04C2/543—Hollow multi-walled panels with integrated webs

Definitions

  • Colored multi-wall sheet made of polycarbonate with improved fire protection behavior made of polycarbonate with improved fire protection behavior
  • the invention relates to a colored multi-wall sheet made of polycarbonate with improved fire protection behavior in relation to the requirements for the building material class Bl
  • EP-A 0 548 822 describes translucent, IR-reflecting bodies with sun protection and thermal insulation effect, such as plates, multi-wall sheets or domelights, which are made of a stiff, amorphous base material made of translucent plastic, such as e.g. Polycarbonate can exist and are provided with a translucent coating material, with a content of 20 to 40 wt .-% of red and IR reflecting particles, which consist of a 60 to 120 nm thick layer of titanium dioxide on a platelet-shaped carrier pigment.
  • the coating layer with the so-called pearlescent pigments can be applied by coextrusion or by coatings such as painting or by reverse roll coating.
  • co-extruded layer contains mica platelets coated with TiO 2 . It is a so-called pearlescent pigment.
  • the coextruded pigment layer contains a further coextruded layer
  • EP-A 0 130 576 and EP-A 450 478 describe colorants which are suitable for acrylic glasses and which, inter alia, Powdery inorganic pigments can be.
  • Multi-wall sheets made of polycarbonate pass the Bl fire test, even with thicknesses of more than 10 mm.
  • the powdery inorganic pigments distributed in the mass have a negative effect on the fire behavior from a plate thickness or thickness of more than 10 mm. It was therefore seen as a task to provide colored multi-wall or multi-wall sheets made of polycarbonate with a thickness of more than 10 mm, which meet the requirements for the Bl fire test.
  • the object is achieved by a double-wall sheet or multiple-sheet multi-sheet made of polycarbonate with a thickness of more than 10 mm with at least one additional layer of polycarbonate with a thickness of 5 to 150 ⁇ m applied to a belt surface, characterized in that it contains a powdery, inorganic color pigment, is contained in a concentration of 5 to 70 wt .-%.
  • the invention further relates to the use of a powdery inorganic pigment in a concentration of 5 to 70% by weight in an additional layer of polycarbonate with a thickness of 5 to 150 ⁇ m on the belt surface of a double-walled or multi-layered plate made of polycarbonate with a thickness of more than 10 mm as an agent that improves fire protection behavior, ie an agent that mediates the passing of the Bl fire test.
  • the invention relates to double-wall sheets or multi-wall sheets with a thickness of more than 10 mm.
  • Such plates made of polycarbonate but also from other plastics are well known and are manufactured by means of extrusion. They consist of the top and bottom belts, which are spaced from a large number of mostly parallel webs at a given distance, in the present case in the range of 10 mm or more, and have corresponding, mostly rectangular cavities.
  • Double-skin sheets have an upper chord and a lower chord as well as the bars in between.
  • multi-wall panels have further internal straps (intermediate chords) that usually run parallel to the upper chord and lower chord. According to the number of straps one speaks of z. B. of triple or quadruple-walled panels etc.
  • intermediate chords internal straps
  • Double-skin sheets or multi-skin sheets with rectangular geometries are available also corresponding plates with sloping straps, the z. B. also be called truss panels.
  • Double-wall sheets or multiple-sheet sheets according to the present invention have a thickness of more than 10 mm, preferably 12 to 40, particularly preferably 15 to
  • the thickness is the distance between the webs plus the height of the upper and lower chord and any existing intermediate chords. One can also speak of the total thickness or plate height.
  • Usual basis weights are in the range of more than 2 kg / m 2 , preferably 2.1 to
  • Usual dimensions of the upper and lower chord are in the range from 0.5 to 4, particularly preferably 0.6 to 1.5 mm.
  • the webs and any existing intermediate straps are usually significantly thinner, e.g. B. 0.1 to 1.5 mm.
  • Usual plate widths which are determined by the width of the extrusion die, are between 100 and 3000 mm.
  • Usual plate lengths are in the range from 500 mm to 10000 mm.
  • Polycarbonate is well known as a thermoplastically processable plastic.
  • the polycarbonate plastics are predominantly aromatic polycarbonates based on bisphenols, especially bisphenol A.
  • the method of applying additional layers e.g. B. made of polycarbonate, on one or both surfaces of the upper or lower belts is also well known (see, for example, EP-A 368 094, EP-A 372 213, EP-A 0 548 822).
  • the coating layer can contain, for example, UV absorbers or pearlescent pigments and can be applied by coextrusion or by lacquering or by reverse roll coating.
  • the base molding to be coated itself should contain as little or as little inorganic pigment as possible, for example 0 to 0.1% by weight, 0 to 0.01% by weight.
  • polycarbonate is best used as a binder for the powdery inorganic pigment. Coextrusion is preferred.
  • the pigment can be mixed in a manner known per se (see, for example, EP-A 110 238) with a polycarbonate melt in a first extruder and then in a coextrusion die onto a polycarbonate melt layer from a second extruder, which layer underneath
  • Web plate forms to be put on. It is preferable to choose a polycarbonate molding composition which is more free-flowing than that of the base plate material. This allows the increase in viscosity to be compensated for by the pigment introduced.
  • the additional layer of polycarbonate has a thickness in the range from 5 to 150 ⁇ m. Painted layers in which pigment and polycarbonate are applied together in a solvent are somewhat thinner after evaporation of the solvent, usually in the range of 5 to 30 ⁇ m. Coextruded layers are in the range from 20 to 120 ⁇ m, preferably in the range from 25 to 50 ⁇ m, in particular 50 to 100 ⁇ m.
  • the plates can also be provided with corresponding coextrusion layers on both sides, but as a rule one layer is sufficient to obtain the desired color impression, corresponding to a plate colored in the mass.
  • Powdery inorganic pigments are e.g. B. from EP-A 0 130 576 and EP-A 450 478 known for coloring acrylic glasses and are also suitable for polycarbonate.
  • Examples include chrome yellow, iron oxide pigments, cadnium oxide pigments, chromium oxide pigments, bronzes, etc.
  • Red pigments include cadnium sulfide / selenide. Brown colorations can be adjusted using a mixture of TiO 2 , cadnium selenide, ⁇ -phthalocyanine blue and iron oxide rate, for example in an approximate weight ratio of 150: 43: 10: 39 (analogously to. Example 6 of EP-A 0 130 576).
  • White pigments are preferably used.
  • White pigments can be, for example, titanium dioxide, zinc oxide, zinc sulfide, lead carbonate, basic lead sulfate, antimony oxide, barium sulfate or mixtures thereof. Titanium dioxide in the rutile modification and barium sulfate are preferably used (cf. Kirk-Othmer, Encyclopedia of Chemical Technology, vol. 17, pages 801 to 814, 3rd edition, John Wiley & Sons, New York, 1982). Particularly preferred as the white pigment is TiO 2 and or BaSO 4 , especially in a mixture, e.g. B. in a mixing ratio of 2: 1 to 1: 2.
  • the pigment concentration in the coating layer should be sufficient to produce a color impression similar to that of a mass-colored material, e.g. to provide a corresponding degree of transmission or a corresponding light scattering effect. As a rule, this is the case with a pigment concentration of 5 to 60% by weight, preferably 10 to 30% by weight.
  • the transmission (according to DIN 67 507 tau d65) is advantageously in the range from 20 to 70, preferably 40 to 60%.
  • Pearlescent pigments in which a pigment is applied to a platelet-shaped carrier pigment, for example mica, e.g. B. IR-reflecting pearlescent pigments are obviously unsuitable for the purposes of the invention, since they do not impart the desired fire behavior.
  • Example 1 Double-wall sheet (SDP) made of polycarbonate, thickness 10 mm, colorless.
  • Example 2 Double-wall sheet (SDP) made of polycarbonate, thickness 10 mm, colored white with TiO 2 BaSO 4 so that its transmission T is about 50% (measured according to DIN 67 507 (tau d65)).
  • Example 3 Triple-wall sheet (S3P) made of polycarbonate, thickness 16 mm, colorless.
  • Example 4 Triple-wall sheet (S3P) made of polycarbonate, thickness 16 mm, colored white with TiO / BaSO so that its transmission T is about 50% (measured according to DIN 67 507 (tau d65)).
  • Example 5 4-gang multi-wall sheet (S4P) made of polycarbonate, thickness 25 mm, colorless.
  • Example 6 Four-ply multi-wall sheet (S4P) made of polycarbonate, thickness 25 mm, colored white with TiO 2 / BaSO 4 so that its transmission T is about 50% (measured according to DIN 67 507 (tau d65)).
  • Example 7 Four-ply multi-wall sheet (S4P) made of polycarbonate, 25 mm thick, with a coextruded top layer (about 80 ⁇ m) made of polycarbonate, containing about 25% by weight of TiO 2 / BaSO 4 (the transmission T is about 50% (measured according to DIN 67 507 (tau d65)).

Abstract

The invention relates to a double ribbed plate or a multi-layered ribbed plate made of polycarbonate having a thickness of more than 10 mm and at least one additional layer made of polycarbonate applied to one flange surface. According to the invention, said surface comprises a thickness of 5 - 150 µm. The invention is characterised in that the ribbed plate contains a colouring pigment in a powdery and inorganic form in a concentration of 5 - 70 wt. %.

Description

Eingefärbte Stegplatte aus Polycarbonat mit verbessertem BrandschutzverhaltenColored multi-wall sheet made of polycarbonate with improved fire protection behavior
Die Erfindung betrifft eine eingefärbte Stegplatte aus Polycarbonat mit verbessertem Brandschutzverhalten in Bezug auf die Erfordernisse für die Baustoffklasse Bl derThe invention relates to a colored multi-wall sheet made of polycarbonate with improved fire protection behavior in relation to the requirements for the building material class Bl
DIN 4102-1 „Brandverhalten von Baustoffen und Bauteilen" (Ausgabe Mai 1998).DIN 4102-1 "Fire behavior of building materials and components" (May 1998 edition).
Stand der TechnikState of the art
Bekannt sind Stegdoppelplatte oder Stegmehrfachplatte aus Polycarbonat mit coextrudierten Schichten, die z. B. UN-Absorber enthalten können (EP-A 110 238, EP-A 368 094, EP-A 372 213 und EP-A 599 208), sowie die entsprechenden Herstellungsverfahren.Web double plate or multi-wall sheet made of polycarbonate with coextruded layers are known, the z. B. UN absorbers (EP-A 110 238, EP-A 368 094, EP-A 372 213 and EP-A 599 208), and the corresponding manufacturing process.
EP-A 0 548 822 beschreibt lichtdurchlässige, IR-reflektierende Körper mit Sonnenschutz- und Wärmedämmwirkung, wie Platten, Stegplatten oder Lichtkuppeln, die aus einem ein steifen, amorphen Basismaterial aus lichtdurchlässigem Kunststoff, wie z.B. Polycarbonat, bestehen können und einem lichtdurchlässigen Überzugsmaterial versehen sind, mit einem Gehalt von 20 bis 40 Gew.-% an rot- und IR-re- flektierenden Teilchen, die aus einer 60 bis 120 nm dicken Schicht von Titandioxid auf einem blättchenförmigen Trägerpigment bestehen. Die Überzugsschicht mit den sogenannten Perlglanzpigmenten kann auf dem Wege der Coextrusion oder durch Beschichtungen wie Lackieren oder durch Reverse-Roll-Coating aufgebracht werden.EP-A 0 548 822 describes translucent, IR-reflecting bodies with sun protection and thermal insulation effect, such as plates, multi-wall sheets or domelights, which are made of a stiff, amorphous base material made of translucent plastic, such as e.g. Polycarbonate can exist and are provided with a translucent coating material, with a content of 20 to 40 wt .-% of red and IR reflecting particles, which consist of a 60 to 120 nm thick layer of titanium dioxide on a platelet-shaped carrier pigment. The coating layer with the so-called pearlescent pigments can be applied by coextrusion or by coatings such as painting or by reverse roll coating.
Weiterhin bekannt sind handelsübliche sind z.B. Stegmehrfachplatten Stegmehrfachplatten aus Polycarbonat mit einer Dicke von 16 bzw. 25 mm entsprechender LR-re- flektierender Ausrüstung. Dabei sind in einer coextrudierten Schicht mit TiO2 beschichtete Glimmerplättchen enthalten. Es handelt sich hierbei um ein sogenanntes Perlglanzpigment. Zum Zwecke verbesserter Witterungsbeständigkeit ist auf der coextrudierten Pigmentschicht noch eine weitere coextrudierte Schicht enthaltendAlso known are commercially available, for example, multi-wall sheets multi-wall sheets made of polycarbonate with a thickness of 16 or 25 mm corresponding LR reflecting equipment. A co-extruded layer contains mica platelets coated with TiO 2 . It is a so-called pearlescent pigment. For the purpose of improved weather resistance, the coextruded pigment layer contains a further coextruded layer
UN- Absorber vorhanden. Stegdoppel- oder Stegmehrfachplatten aus Polycarbonat, mit in der Masse verteilten pulverförmigen anorganischen Pigmenten, z.B. Weißpigmenten eingefärbte sind bekannt und handelsüblich.UN absorber available. Double or multi-wall sheets made of polycarbonate, with colored inorganic pigments distributed in the mass, for example white pigments, are known and commercially available.
EP-A 0 130 576 und EP-A 450 478 beschreiben für Acrylgläser geeignete Farbmittel, die u.a. pulverförmige anorganische Pigmente sein können.EP-A 0 130 576 and EP-A 450 478 describe colorants which are suitable for acrylic glasses and which, inter alia, Powdery inorganic pigments can be.
Aufgabe und LösungTask and solution
Eingefärbte Stegdoppel- oder Stegmehrfachplatten aus Polycarbonat, mit in der Masse verteilten pulverförmigen anorganischen Pigmenten, z. B. Weißpigmenten sind bekannt und handelsüblich. Bestimmte Verwendungen verlangen das Erfüllen der Anforderungen der Bl -Brandklasse bzw. Baustoffklasse Bl in der DIN 4102-1 „Brandverhalten von Baustoffen und Bauteilen" (Ausgabe Mai 1998). Beim BlColored double or multi-wall sheets made of polycarbonate, with powdered inorganic pigments distributed in the mass, e.g. B. White pigments are known and commercially available. Certain uses require compliance with the requirements of the Bl fire class or building material class Bl in DIN 4102-1 "Fire behavior of building materials and components" (May 1998 edition)
Brandtest werden mehrere zuvor konditionierte Probekörper senkrecht in ein Gestell gehängt und in einer Messkammer von unten beflammt.Fire test, several previously conditioned test specimens are hung vertically in a frame and exposed to flame in a measuring chamber from below.
Wie sich zeigte, erfüllen jedoch nur solche eingefärbten Stegdoppel- oder Stegmehr- fachplatten aus Polycarbonat den Bl -Brandtest, die eine Dicke von höchstens 10 mm aufweisen. Dies mag bei diesen Platten auf der relative geringen Materialstärke beruhen, die bewirkt, dass das Material bei der Bl -Brandtestanordnung sehr schnell abschmilzt und sich der Wirkung der Testflamme entzieht. Kaum erklären lässt sich das Brandverhalten dickerer Platten. Dickere, in der Masse eingefärbte Stegdoppel- oder Stegmehrfachplatten bestehen den Bl -Brandtest nicht. Farblose Stegdoppel- oderAs was shown, however, only those colored double or multi-wall sheets made of polycarbonate meet the Bl fire test, which have a thickness of at most 10 mm. With these plates, this may be due to the relatively low material thickness, which causes the material in the Bl fire test arrangement to melt very quickly and escape the effect of the test flame. The fire behavior of thicker panels can hardly be explained. Thicker double-walled or multi-wall multi-colored sheets do not pass the Bl fire test. Colorless double or double
Stegmehrfachplatten aus Polycarbonat bestehen dagegen den Bl -Brandtest, auch bei Dicken von mehr als 10 mm. Offenbar wirken sich daher die in der Masse verteilten pulverförmigen anorganischen Pigmente ab einer Plattenstärke bzw. -dicke von mehr als 10 mm negativ auf das Brandverhalten aus. Es wurde daher als Aufgabe gesehen, eingefärbte Stegdoppel- oder Stegmehrfachplatten aus Polycarbonat mit einer Dicke von mehr als 10 mm bereitzustellen, die den Anforderungen an den Bl -Brandtest genügen.Multi-wall sheets made of polycarbonate, on the other hand, pass the Bl fire test, even with thicknesses of more than 10 mm. Apparently, the powdery inorganic pigments distributed in the mass have a negative effect on the fire behavior from a plate thickness or thickness of more than 10 mm. It was therefore seen as a task to provide colored multi-wall or multi-wall sheets made of polycarbonate with a thickness of more than 10 mm, which meet the requirements for the Bl fire test.
Die Aufgabe wird gelöst durch eine Stegdoppelplatte oder Stegmehrfachplatte aus Polycarbonat mit einer Dicke von mehr als 10 mm mit mindestens einer auf einer Gurtfläche aufgebrachten zusätzlichen Schicht aus Polycarbonat mit einer Dicke von 5 bis 150 μm, dadurch gekennzeichnet, dass darin ein pulverförmiges, anorganisches Farbpigment, in einer Konzentration von 5 bis 70 Gew.-% enthalten ist.The object is achieved by a double-wall sheet or multiple-sheet multi-sheet made of polycarbonate with a thickness of more than 10 mm with at least one additional layer of polycarbonate with a thickness of 5 to 150 μm applied to a belt surface, characterized in that it contains a powdery, inorganic color pigment, is contained in a concentration of 5 to 70 wt .-%.
Die Erfindung betrifft weiterhin die Verwendung eines pulverförmigen anorganischen Pigments in einer Konzentration von 5 bis 70 Gew.-% in zusätzlichen Schicht aus Polycarbonat mit einer Dicke von 5 bis 150 μm auf der Gurtfläche einer Stegdoppelplatte oder Stegmehrfachplatte aus Polycarbonat mit einer Dicke von mehr als 10 mm als ein, das Brandschutzverhalten verbesserndes Agenz, d.h. ein Agenz, das das Bestehen des Bl -Brandtests vermittelt.The invention further relates to the use of a powdery inorganic pigment in a concentration of 5 to 70% by weight in an additional layer of polycarbonate with a thickness of 5 to 150 μm on the belt surface of a double-walled or multi-layered plate made of polycarbonate with a thickness of more than 10 mm as an agent that improves fire protection behavior, ie an agent that mediates the passing of the Bl fire test.
Ausführung der ErfindungImplementation of the invention
Die Erfindung betrifft Stegdoppelplatten oder Stegmehrfachplatten mit einer Dicke von mehr als 10 mm. Derartige Platten aus Polycarbonat aber auch aus anderen Kunststoffen sind hinlänglich bekannt und werden mittels Extrusion gefertigt. Sie bestehen aus den jeweils oben und unten liegenden Gurten, die von einer Vielzahl meist paralleler Stege im jeweiligen Abstand, in vorliegenden Fall im Bereich von 10 mm oder mehr, distanziert werden und entsprechende, meist rechteckige Hohlräume aufweisen. Stegdoppelplatten besitzen einen Obergurt und einen Untergurt sowie die dazwischen liegenden Stege. Stegmehrfachplatten besitzen neben dem Obergurt und einen Untergurt und den Stegen weitere meist parallel zum Obergurt und Untergurt verlaufende innen liegende Gurte (Zwischengurte). Entsprechend der Anzahl der Gurte sprich man von z. B. von Stegdreifach- oder Stegvierfachplatten etc.. NebenThe invention relates to double-wall sheets or multi-wall sheets with a thickness of more than 10 mm. Such plates made of polycarbonate but also from other plastics are well known and are manufactured by means of extrusion. They consist of the top and bottom belts, which are spaced from a large number of mostly parallel webs at a given distance, in the present case in the range of 10 mm or more, and have corresponding, mostly rectangular cavities. Double-skin sheets have an upper chord and a lower chord as well as the bars in between. In addition to the upper chord and a lower chord and the webs, multi-wall panels have further internal straps (intermediate chords) that usually run parallel to the upper chord and lower chord. According to the number of straps one speaks of z. B. of triple or quadruple-walled panels etc. In addition
Stegdoppelplatten oder Stegmehrfachplatten mit rechteckigen Geometrien gibt es auch entsprechende Platten mit schräg angeordneten Gurten, die z. B. auch als Fachwerkplatten bezeichnet werden.Double-skin sheets or multi-skin sheets with rectangular geometries are available also corresponding plates with sloping straps, the z. B. also be called truss panels.
Stegdoppelplatten oder Stegmehrfachplatten gemäß der vorliegenden Erfindung wei- sen eine Dicke von mehr als 10 mm, bevorzugt 12 bis 40, besonders bevorzugt 15 bisDouble-wall sheets or multiple-sheet sheets according to the present invention have a thickness of more than 10 mm, preferably 12 to 40, particularly preferably 15 to
30 mm auf. Mit der Dicke ist dabei der Abstand der Stege plus der Höhe von Ober- und Untergurt und ggf. vorhandener Zwischengurte bezeichnet. Man kann auch von der Gesamtdicke oder Plattenhöhe sprechen.30 mm on. The thickness is the distance between the webs plus the height of the upper and lower chord and any existing intermediate chords. One can also speak of the total thickness or plate height.
Übliche Flächengewichte liegen im Bereich von mehr als 2 kg/m2, bevorzugt 2,1 bisUsual basis weights are in the range of more than 2 kg / m 2 , preferably 2.1 to
6, besonders bevorzugt 2,5 bis 5, insbesondere 2,6 bis 4 kg/m2.6, particularly preferably 2.5 to 5, in particular 2.6 to 4 kg / m 2 .
Übliche Abmessung von Ober- und Untergurt liegen im Bereich von 0,5 bis 4, besonders bevorzugt 0,6 bis 1,5 mm. Die Stege und ggf. vorhandenen Zwischengurte sind in der Regel deutlich dünner, z. B. 0,1 bis 1,5 mm. Übliche Plattenbreiten, die durch die Breite der Extrusionsdüse vorgegeben ist, liegen zwischen 100 und 3000 mm. Übliche Plattenlängen liegen im Bereich von 500 mm bis 10000 mm.Usual dimensions of the upper and lower chord are in the range from 0.5 to 4, particularly preferably 0.6 to 1.5 mm. The webs and any existing intermediate straps are usually significantly thinner, e.g. B. 0.1 to 1.5 mm. Usual plate widths, which are determined by the width of the extrusion die, are between 100 and 3000 mm. Usual plate lengths are in the range from 500 mm to 10000 mm.
Polycarbonat ist als thermoplastisch verarbeitbarer Kunststoff hinlänglich bekannt. Die Polycarbonat-Kunststoffe sind vorwiegend aromatische Polycarbonate auf Basis von Bisphenolen, insbesondere Bisphenol A.Polycarbonate is well known as a thermoplastically processable plastic. The polycarbonate plastics are predominantly aromatic polycarbonates based on bisphenols, especially bisphenol A.
Das Verfahren zum Aufbringen zusätzlicher Schichten z. B. aus Polycarbonat, auf einer oder beiden Flächen der Ober- oder Untergurte ist ebenfalls hinlänglich bekannt (s. z.B. EP-A 368 094, EP-A 372 213, EP-A 0 548 822 ). Die Überzugsschicht können dabei z.B. UV- Absorber oder Perlglanzpigmente enthalten und auf dem Wege der Coextrusion oder durch Lackieren oder durch Reverse-Roll-Coating aufgebracht werden. Der zu beschichtende Basisformkörper selbst soll möglichst kein oder nur wenig anorganisches Pigment enthalten, z, B. 0 bis 0,1 Gew.-% , 0 bis 0,01 Gew.-%. Als Bindemittel für das pulverförmige anorganische Pigment, dient am besten wiederum Polycarbonat. Bevorzugt ist die Coextrusion. Das Pigment kann dabei in an sich bekannter Weise (s. z.B. EP-A 110 238) mit einer Polycarbonat-Schmelze im einem ersten Extruder vermischt werden und dann in einer Coextrusionsdüse auf eine Polycarbonat-Schmelzeschicht aus einem zweiten Extruder, die die darunterliegendeThe method of applying additional layers e.g. B. made of polycarbonate, on one or both surfaces of the upper or lower belts is also well known (see, for example, EP-A 368 094, EP-A 372 213, EP-A 0 548 822). The coating layer can contain, for example, UV absorbers or pearlescent pigments and can be applied by coextrusion or by lacquering or by reverse roll coating. The base molding to be coated itself should contain as little or as little inorganic pigment as possible, for example 0 to 0.1% by weight, 0 to 0.01% by weight. Again, polycarbonate is best used as a binder for the powdery inorganic pigment. Coextrusion is preferred. The pigment can be mixed in a manner known per se (see, for example, EP-A 110 238) with a polycarbonate melt in a first extruder and then in a coextrusion die onto a polycarbonate melt layer from a second extruder, which layer underneath
Stegplatte ausbildet, aufgesetzt werden. Bevorzugt wählt man eine leichter fließendere Polycarbonat-Formmasse als die des Basis-Plattenmaterial. Dadurch kann die Viskositätserhöhung durch das eingebrachte Pigment ausgeglichen werden. Die zusätzliche Schicht aus Polycarbonat hat eine Dicke im Bereich von 5 bis 150 μm. La- ckierte Schichten bei denen Pigment und Polycarbonat gemeinsam in einem Lösungsmittel aufgebracht werden, sind nach dem Verdampfen des Lösungsmittels etwas dünner, meist im Bereich von 5 bis 30 μm. Coextrudierte Schichten liegen im Bereich von 20 bis 120 μm, bevorzugt im Bereich von 25 bis 50 μm, insbesondere 50 bis 100 μm. Man kann die Platten auch auf beiden Seiten mit entsprechenden Coextrusionsschichten versehen, in der Regel genügt jedoch bereits ein Schicht, um den gewünschten Farbeindruck, entsprechend einer in der Masse eingefärbten Platten zu erhalten.Web plate forms, to be put on. It is preferable to choose a polycarbonate molding composition which is more free-flowing than that of the base plate material. This allows the increase in viscosity to be compensated for by the pigment introduced. The additional layer of polycarbonate has a thickness in the range from 5 to 150 μm. Painted layers in which pigment and polycarbonate are applied together in a solvent are somewhat thinner after evaporation of the solvent, usually in the range of 5 to 30 μm. Coextruded layers are in the range from 20 to 120 μm, preferably in the range from 25 to 50 μm, in particular 50 to 100 μm. The plates can also be provided with corresponding coextrusion layers on both sides, but as a rule one layer is sufficient to obtain the desired color impression, corresponding to a plate colored in the mass.
Pulverförmige anorganische Pigmente sind z. B. aus EP-A 0 130 576 und EP-A 450 478 bekannt zum Einfärben von Acrylgläser bekannt und sind auch für Polycarbonat geeignet. Zu nennen sind z.B. Chromgelb, Eisenoxidpigmente, Cadniumoxidpig- mente, Chromoxidpigmente, Bronzen etc. Rotpigmente sind z.B. Cadniumsul- fid/selenid. Braune Einfärbungen lassen sich mit einer Mischung von TiO2, Cadni- umselenid, ß-Phtalocyaninblau und Eisenoxidrat z.B. im ungefähren Gewichtsver- hältnis 150 : 43 : 10 : 39 einstellen (sinngemäß zu. Beispiel 6 der EP-A 0 130 576).Powdery inorganic pigments are e.g. B. from EP-A 0 130 576 and EP-A 450 478 known for coloring acrylic glasses and are also suitable for polycarbonate. Examples include chrome yellow, iron oxide pigments, cadnium oxide pigments, chromium oxide pigments, bronzes, etc. Red pigments include cadnium sulfide / selenide. Brown colorations can be adjusted using a mixture of TiO 2 , cadnium selenide, β-phthalocyanine blue and iron oxide rate, for example in an approximate weight ratio of 150: 43: 10: 39 (analogously to. Example 6 of EP-A 0 130 576).
Bevorzugt werden Weißpigmente eingesetzt. Weißpigmente können beispielsweise Titandioxid, Zinkoxid, Zinksulfid, Bleicarbonat, basisches Bleisulfat, Antimonoxid, Bariumsulfat oder Mischungen hiervon sein. Bevorzugt eingesetzt werden Titandi- oxid in der Rutil-Modifikation und Bariumsulfat (vgl. hierzu Kirk-Othmer, Encyclo- pedia of Chemical Technology, Vol. 17, Seiten 801 bis 814, 3rd. Edition, John Wiley & Sons, New York, 1982). Besonders bevorzugt als Weißpigment ist TiO2 und oder BaSO4, insbesondere in Mischung, z. B. im Mischungsverhältnis 2 : 1 bis 1 : 2.White pigments are preferably used. White pigments can be, for example, titanium dioxide, zinc oxide, zinc sulfide, lead carbonate, basic lead sulfate, antimony oxide, barium sulfate or mixtures thereof. Titanium dioxide in the rutile modification and barium sulfate are preferably used (cf. Kirk-Othmer, Encyclopedia of Chemical Technology, vol. 17, pages 801 to 814, 3rd edition, John Wiley & Sons, New York, 1982). Particularly preferred as the white pigment is TiO 2 and or BaSO 4 , especially in a mixture, e.g. B. in a mixing ratio of 2: 1 to 1: 2.
Die Pigmentkonzentration in der Überzugsschicht soll ausreichen, um einen ähnlichen Farbeindruck wie bei einem in Masse eingefärbten Material zu erzeugen, also z.B. einen entsprechen Transmissionsgrad oder eine entsprechende Lichtstreuwirkung bereitzustellen. In der Regel in dies bei einer Pigmentkonzentration von 5 bis 60 Gew.-%, bevorzugt 10 bis 30 Gew.-% der Fall. Die Transmission liegt (nach DIN 67 507 tau d65) günstigerweise im Bereich von 20 bis 70, bevorzugt 40 bis 60 %.The pigment concentration in the coating layer should be sufficient to produce a color impression similar to that of a mass-colored material, e.g. to provide a corresponding degree of transmission or a corresponding light scattering effect. As a rule, this is the case with a pigment concentration of 5 to 60% by weight, preferably 10 to 30% by weight. The transmission (according to DIN 67 507 tau d65) is advantageously in the range from 20 to 70, preferably 40 to 60%.
Perlglanzpigmente, bei denen ein Pigment auf ein plättchenförmiges Trägerpigment, z.B. Glimmer, aufgebracht ist, z. B. IR-reflektierende Perlglanzpigmente, sind offenbar für die Zwecke der Erfindung ungeeignet, da Sie nicht das gewünschte Brandverhalten vermitteln. Pearlescent pigments in which a pigment is applied to a platelet-shaped carrier pigment, for example mica, e.g. B. IR-reflecting pearlescent pigments are obviously unsuitable for the purposes of the invention, since they do not impart the desired fire behavior.
BeispieleExamples
Bl -Brandtests an mehreren Probekörpern.Bl fire tests on several test specimens.
Beim Bl Brandtest werden gemäß DIN 4102-1 mehrere zuvor konditionierte Probekörper in ein Gestell gehängt und in einer Messkammer (Brandschacht) von unten beflammt. Der Brandtest gilt als bestanden (DIN 4102-1, Punkt 6.1.2.2), wenn bei der Prüfung nach 6.1.3.1 :In the Bl fire test, several previously conditioned test specimens are hung in a frame and flamed in a measuring chamber (fire shaft) from below in accordance with DIN 4102-1. The fire test is considered passed (DIN 4102-1, point 6.1.2.2) if, in the test according to 6.1.3.1:
a) wenn der Mittelwert der Restlängen (nach 9.1 von DIN 4102-16 : 1998-05) jedes Probekörpers mindestens 15 cm beträgt, und dabei keine Probe eine Restlänge von 0 cm aufweist. b) bei keinen Versuch die Rauchgastemperatur 200°C überschreitet c) die Proben nur so weit nachbrennen mit Flamme, nachglimmen oder nach- schwelen, dass die Anforderungen an die Restlänge erfüllt werden.a) if the mean of the remaining lengths (according to 9.1 of DIN 4102-16: 1998-05) of each test specimen is at least 15 cm, and no sample has a remaining length of 0 cm. b) in no test does the flue gas temperature exceed 200 ° C c) only burn the samples with flame, afterglow or smolder so far that the requirements for the remaining length are met.
Es werden geprüft:The following are checked:
Beispiel 1: Stegdoppelplatte (SDP) aus Polycarbonat, Dicke 10 mm, farblos.Example 1: Double-wall sheet (SDP) made of polycarbonate, thickness 10 mm, colorless.
Beispiel 2: Stegdoppelplatte (SDP)aus Polycarbonat, Dicke 10 mm, weiß in der Masse mit TiO2 BaSO4 eingefärbt, so dass ihre Transmission T bei etwa 50 % liegt (gemessen nach DIN 67 507 (tau d65)).Example 2: Double-wall sheet (SDP) made of polycarbonate, thickness 10 mm, colored white with TiO 2 BaSO 4 so that its transmission T is about 50% (measured according to DIN 67 507 (tau d65)).
Beispiel 3: Stegdreifachplatte (S3P) aus Polycarbonat, Dicke 16 mm, farblos.Example 3: Triple-wall sheet (S3P) made of polycarbonate, thickness 16 mm, colorless.
Beispiel 4: Stegdreifachplatte (S3P)aus Polycarbonat, Dicke 16 mm, weiß in der Masse mit TiO /BaSO eingefärbt, so dass ihre Transmission T bei etwa 50 % liegt (gemessen nach DIN 67 507 (tau d65)).Example 4: Triple-wall sheet (S3P) made of polycarbonate, thickness 16 mm, colored white with TiO / BaSO so that its transmission T is about 50% (measured according to DIN 67 507 (tau d65)).
Beispiel 5: Stegvierfachplatte (S4P) aus Polycarbonat, Dicke 25 mm, farblos. Beispiel 6: Stegvierfachplatte (S4P)aus Polycarbonat, Dicke 25 mm, weiß in der Masse mit TiO2/BaSO4 eingefärbt, so dass ihre Transmission T bei etwa 50 % liegt (gemessen nach DIN 67 507 (tau d65)).Example 5: 4-gang multi-wall sheet (S4P) made of polycarbonate, thickness 25 mm, colorless. Example 6: Four-ply multi-wall sheet (S4P) made of polycarbonate, thickness 25 mm, colored white with TiO 2 / BaSO 4 so that its transmission T is about 50% (measured according to DIN 67 507 (tau d65)).
Beispiel 7: Stegvierfachplatte (S4P)aus Polycarbonat, Dicke 25 mm, mit coextru- dierter Deckschicht (ca. 80 μm) aus Polycarbonat, enthaltend ca. 25 Gew.-% TiO2/BaSO4 (die Transmission T liegt bei etwa 50 % (gemessen nach DIN 67 507 (tau d65)).Example 7: Four-ply multi-wall sheet (S4P) made of polycarbonate, 25 mm thick, with a coextruded top layer (about 80 μm) made of polycarbonate, containing about 25% by weight of TiO 2 / BaSO 4 (the transmission T is about 50% (measured according to DIN 67 507 (tau d65)).
Die Platten gemäß den Beispielen 1, 2, 3 und 5 (Stand der Techmk) und 7 (erfϊn- dungsgemäß) bestehen den Bl -Brandtest.The plates according to Examples 1, 2, 3 and 5 (state of the Techmk) and 7 (according to the invention) pass the Bl fire test.
Die Platten gemäß den Beispielen 4 und 6 bestehen den Bl -Brandtest nicht. The plates according to Examples 4 and 6 do not pass the Bl fire test.

Claims

Patentansprttche; Patentansprttche;
1. Stegdoppelplatte oder Stegmehrfachplatte aus Polycarbonat mit einer Dicke von mehr als 10 mm und mindestens einer auf einer Gurtfläche aufgebrach- ten zusätzlichen Schicht aus Polycarbonat mit einer Dicke von 5 bis 150 μm, dadurch gekennzeichnet, dass darin ein pulverförmiges, anorganisches Farbpigment, in einer Konzentration von 5 bis 70 Gew.-% enthalten ist.1. Double-walled or multi-walled plate made of polycarbonate with a thickness of more than 10 mm and at least one additional layer of polycarbonate with a thickness of 5 to 150 μm applied to a belt surface, characterized in that it contains a powdery, inorganic color pigment in a Concentration of 5 to 70 wt .-% is included.
2. Stegdoppelplatte oder Stegmehrfachplatte nach Anspruch 1, dadurch gekenn- zeichnet, dass das Farbpigment ein Weißpigment ist.2. Double wall plate or multi-wall plate according to claim 1, characterized in that the color pigment is a white pigment.
3. Stegdoppelplatte oder Stegmehrfachplatte nach Anspruch 2, dadurch gekennzeichnet, dass das als Weißpigment TiO und/oder BaSO4 eingesetzt wird.3. Double wall plate or multi-wall plate according to claim 2, characterized in that that is used as a white pigment TiO and / or BaSO 4 .
4. Stegdoppelplatte oder Stegmehrfachplatte nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die zusätzliche Schicht aus Polycarbonat coextrudiert ist.4. Double wall sheet or multiple multi-sheet sheet according to one or more of claims 1 to 3, characterized in that the additional layer of polycarbonate is coextruded.
5. Stegdoppelplatte oder Stegmehrfachplatte nach Anspruch 1, dadurch gekenn- zeichnet, dass das Flächengewicht mehr als 2 kg/m beträgt.5. Double wall plate or multi-wall plate according to claim 1, characterized in that the weight per unit area is more than 2 kg / m.
6. Verwendung eines pulverförmigen anorganischen Pigments in einer Konzentration von 5 bis 70 Gew.-% in zusätzlichen Schicht aus Polycarbonat mit einer Dicke von 5 bis 150 um auf der Gurtfläche einer Stegdoppelplatte oder Stegmehrfachplatte aus Polycarbonat mit einer Dicke von mehr als 10 mm als das Brandschutzverhalten verbesserndes Agenz. 6. Use of a powdery inorganic pigment in a concentration of 5 to 70 wt .-% in an additional layer of polycarbonate with a thickness of 5 to 150 microns on the belt surface of a double web or multi-plate made of polycarbonate with a thickness of more than 10 mm than that Agent improving fire protection behavior.
PCT/EP2001/012627 2000-11-07 2001-10-31 Coloured ribbed plate made of polycarbonate with improved fire protection resistance WO2002038882A1 (en)

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AU2002214036A AU2002214036A1 (en) 2000-11-07 2001-10-31 Coloured ribbed plate made of polycarbonate with improved fire protection resistance
EP01982453A EP1336014A1 (en) 2000-11-07 2001-10-31 Coloured ribbed plate made of polycarbonate with improved fire protection resistance

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DE2000155186 DE10055186A1 (en) 2000-11-07 2000-11-07 Double- or multi-layer ribbed polycarbonate sheet with improved fire resistance, used for e.g. building applications, has an additional layer of polycarbonate containing inorganic pigment powder on an outer surface
DE10055186.6 2000-11-07

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US8889248B2 (en) 2008-10-31 2014-11-18 Sabic Global Technologies B.V. Multiwall sheet, an article, a method of making a multiwall sheet

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EP0130576A2 (en) 1983-07-02 1985-01-09 Röhm Gmbh Colour concentrates containing acrylic resins as binders
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US8092901B2 (en) 2001-12-10 2012-01-10 Bayer Materialscience Ag Multi-layer weather-resistant, coloured panel
US8889248B2 (en) 2008-10-31 2014-11-18 Sabic Global Technologies B.V. Multiwall sheet, an article, a method of making a multiwall sheet

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