EP0228004A2 - Electrically conductive floor construction - Google Patents

Electrically conductive floor construction Download PDF

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Publication number
EP0228004A2
EP0228004A2 EP86117324A EP86117324A EP0228004A2 EP 0228004 A2 EP0228004 A2 EP 0228004A2 EP 86117324 A EP86117324 A EP 86117324A EP 86117324 A EP86117324 A EP 86117324A EP 0228004 A2 EP0228004 A2 EP 0228004A2
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EP
European Patent Office
Prior art keywords
electrically conductive
floor
floor construction
adhesive
construction according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP86117324A
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German (de)
French (fr)
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EP0228004A3 (en
EP0228004B1 (en
Inventor
Dieter Leukel
Horst Müller
Horst Tamm
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Henkel AG and Co KGaA
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Henkel AG and Co KGaA
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Publication date
Application filed by Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Priority to AT86117324T priority Critical patent/ATE72086T1/en
Publication of EP0228004A2 publication Critical patent/EP0228004A2/en
Publication of EP0228004A3 publication Critical patent/EP0228004A3/en
Application granted granted Critical
Publication of EP0228004B1 publication Critical patent/EP0228004B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F3/00—Carrying-off electrostatic charges
    • H05F3/02—Carrying-off electrostatic charges by means of earthing connections
    • H05F3/025—Floors or floor coverings specially adapted for discharging static charges
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • 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
    • Y10T428/14—Layer or component removable to expose adhesive
    • Y10T428/1424—Halogen containing compound
    • 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
    • Y10T428/23907—Pile or nap type surface or component
    • Y10T428/23979—Particular backing structure or composition
    • 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
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24917—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including metal layer
    • 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
    • Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2861—Coated or impregnated synthetic organic fiber fabric
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/697—Containing at least two chemically different strand or fiber materials

Definitions

  • the subject of the present industrial property right is an electrically conductive floor construction, consisting of a customary usable floor, which has a textile or plastic covering as the top layer and which combines good heat insulation with pleasant elastic accessibility.
  • the property of its electrical conductivity of a useful covering comes more and more to the fore.
  • the walker is electrostatically charged, especially in dry air.
  • this electrostatic charge can lead to unpleasant discharges if the person walking on the floor touches electrically conductive objects and, in addition, also leads to malfunctions in running computer programs or even ignites explosive solvent-air mixtures.
  • conductive useful coverings have already been used, in which an earthed copper strip construction, in particular a copper network, is arranged under the actual top cover.
  • an earthed copper strip construction in particular a copper network
  • the object of the present invention was therefore initially to find a new method or a new construction of an electrically conductive floor, which can be applied without complex removal of the old floor construction.
  • the construction of copper strips and copper wire nets to be applied with the usual means had to be abandoned and a possibility of the desirable application of a new electrically conductive useful covering to an old covering that could not be removed had to be found.
  • the laying fleece (a) provided on one side with a pressure-sensitive adhesive layer is preferably a random fleece made of polypropylene, polyethylene, polyterephthalate or polyamide fibers.
  • the entire plastic fleece should have a weight between about 40 g / m2 and about 250 g / m2, in particular from 60 to 120 g / m2.
  • a dispersion whose films have a high surface tack is particularly suitable as a PSA coating.
  • This electrically non-conductive plastic fleece or only relatively poorly conductive plastic fleece is first provided with a conductive coating which is applied in the form of a coat of paint.
  • This conductive paint contains carbon black or graphite as the active substance.
  • Primarily synthetic or natural latices are used as binders.
  • the use of polychloroprene or polybutadiene styrene or polybutadiene acrylonitrile latex has proven its worth. They expediently also contain rosin derivatives or other hydrocarbons or terpene or balsam resin in dispersed form known as "tackifiers". It is also possible to use conventional additives such as zinc oxide, chalk or barium sulfate.
  • the aforementioned also imparting conductivity Substances are expediently used as commercially available dispersions, the usual wetting agents and emulsifiers naturally having to be present in the system.
  • the primer which can be applied by roller or by spraying, is allowed to dry for about 3 to 24 hours, preferably 5 to 12 hours, depending on the temperature and air movement.
  • the adhesive is then applied to this primer.
  • thin copper strips about 1 to 2 m long are inserted for electrical grounding. This is to ensure proper discharge of the load caused by people walking on it. It is sufficient to insert a copper tape on about 20 to 35 m2.
  • the tape itself should be about 0.05 to 0.25 mm thick. An average thickness within the above limits and a width of 5 to 15 mm is sufficient.
  • the entire floor construction is grounded by gluing thin, approximately 1 m long copper strips for 30 m2 each.
  • the electrically conductive adhesives which are used for the new process or for the construction of the new construction should contain a conductive substance such as carbon black, graphite, copper or possibly silver powder.
  • Aqueous dispersions of polyacrylic acid esters in particular copolymers of medium chain acrylic acid esters (C 3-8 ) and vinyl acetate, have proven to be favorable as binders for the actual adhesive. Copolymers with predominant proportions of vinyl acetate and minor amounts of ethylene, propylene and / or acrylic acid esters can also be used. It is also possible to use latices made of natural or synthetic elastomers, such as polystyrene butadiene. Such basic dispersions should also be the typical ones for adhesive systems Preservatives for preservation, anti-aging agents and fillers, e.g.
  • the carbon black should be added to the adhesive as a commercially available dispersion and should be present in an amount of approximately 3 to 10 percent by weight, based on solids.
  • the actual floor covering should be inserted after a short period of time.
  • the covering itself has to meet high electrical conductivity requirements.
  • Carbon black or graphite-containing PVC and rubber coverings are used as electrically conductive elastomer coverings or elastic floor coverings.
  • Antistatic floor coverings are made on the basis of PVC as well as textile floor coverings.
  • Antistatic PVC coverings contain moisture-retaining chemicals, while antistatic textile coverings can be produced using steel fibers and carbon fibers.
  • the surface consisted of a velor carpet with a jute back, which was firmly glued to the screed. The carpet was carefully cleaned using a vacuum cleaner.
  • a polypropylene fleece of 75 g / m2 basis weight of a one-sided PSA coating (150 g dry / m2) was applied.
  • the pressure sensitive adhesive consisted of an acrylic acid ester copolymer (Acronal V 205, BASF) containing carboxyl groups.
  • the dispersion had a solids content of 70%, pH 4 and 1200 mPa ⁇ s at 23 ° C. (Contraves rheometer).
  • the electrically conductive paint was then applied to the fleece with a roller in an amount of 200 g (wet) over 1 m2.
  • the dispersion was composed of 42% by weight of a polychloroprene dispersion (Neoprene latex 115 DuPont), 30% by weight of natural resin dispersion (rosin derivative dispersion No. 5786 from Hercules) and 28% by weight of a 25% carbon black dispersion ( Derussol AN Degussa). It also contained the usual anti-aging agents, preservatives and protective colloids.
  • the pH was 9.
  • a dried paint had a resistance of less than 3 ⁇ 105 Ohm according to DIN 53276.
  • a 1 m long copper tape measuring 1 m ⁇ 0.2 mm was placed in the still wet paint in the 30 m2 rehearsal room in order to be grounded later.
  • the adhesive had the following composition: 25% by weight aqueous 60% dispersion of a copolymer of acrylic esters with vinyl acetate (commercial product Aeronal V 303 BASF) 2 wt% monobutylene of triethylene glycol 4% by weight xylene 10% by weight rosin (dispersed) 18% by weight of chalk 9% by weight quartz flour 32% by weight carbon black dispersion (25% by weight as a commercial product Derussol AN1-25 / II from Degussa)
  • This adhesive had a resistance of less than 3 ⁇ 105 ohms after drying.
  • Electrically conductive PVC sheets of 2 mm thickness (Mipolam R 480 CE) with dimensions of 60.8 ⁇ 60.8 cm were then placed in the still moist adhesive bed. After 1 week, the conductivity of this floor construction was measured to be 1 ⁇ 106 ohms.
  • Example 1 There was a needle-fleece floor that was carefully cleaned with a vacuum cleaner.
  • the laying fleece of Example 1 which had been provided with pressure-sensitive adhesive on one side, was applied to the soot-coated polychloroprene coating from Example 1. After it has dried overnight, the conductive carpet adhesive is applied with the spatula (B1: tooth gap depth 2.1 mm, tooth gap width 2.3 mm and tooth bridge width 2.7 mm); the adhesive application is 400 g / m2 wet.
  • the conductive adhesive has the same composition as in Example 1.

Abstract

An electrically conductive flooring and method for constructing same upon an existing flooring, which comprises sequential layers of: a nonwoven base layer; an electrically conductive coating layer; an electrically conductive adhesive layer; and an antistatic or electrically conductive top layer; a copper band is optionally located within the coating layer and/or adhesive layer.

Description

Gegenstand des vorliegenden Schutzrechts ist eine elektrisch leitfähige Fußbodenkonstruktion, bestehend aus einem üblichen Nutzboden, der als oberste Lage einen Textil- oder Kunststoff­belag aufweist und der eine gute Wärmeisolierung mit einer angenehmen elastischen Begehbarkeit kombiniert.The subject of the present industrial property right is an electrically conductive floor construction, consisting of a customary usable floor, which has a textile or plastic covering as the top layer and which combines good heat insulation with pleasant elastic accessibility.

Neben den sonstigen Qualitäten, die von einem Fußbodenbelag verlangt werden, tritt mehr und mehr die Eigenschaft seiner elektrischen Leitfähigkeit eines Nutzbelages in den Vordergrund. Beim Begehen eines nicht leitfähigen Bodenbelags kommt es insbesondere bei trockener Luft zur elektrostatischen Aufladung des Begehenden. Diese elektrostatische Aufladung kann einerseits zu unangenehmen Entladungen führen, wenn die den Boden be­gehende Person elektrisch leitfähige Gegenstände berührt und darüber hinaus aber auch zu Störungen an laufenden Programmen von Computern führen oder sogar die Zündung von explosions­fähigen Lösungsmittel-Luftgemischen auslösen.In addition to the other qualities that are required of a floor covering, the property of its electrical conductivity of a useful covering comes more and more to the fore. When walking on non-conductive flooring, the walker is electrostatically charged, especially in dry air. On the one hand, this electrostatic charge can lead to unpleasant discharges if the person walking on the floor touches electrically conductive objects and, in addition, also leads to malfunctions in running computer programs or even ignites explosive solvent-air mixtures.

Insbesondere im technischen Bereich hat man deshalb bereits leitfähige Nutzbeläge verwendet, bei denen unter dem eigentlichen obersten Belag eine geerdete Kupferband-Konstruktion, ins­besondere ein Kupfernetz, angeordnet ist. Bei PVC-Fliesen ist es in diesem Falle erforderlich, die Netze bzw. sich kreuzende Kupferbänder so zu verlegen, daß in der Mitte der Fliesen sich die Kupferbänder kreuzen, so daß jeweils unter der Mitte der Fliese ein elektrisch besonders gut leitfähiger Punkt angeordnet ist. Zur Vereinfachung dieser recht aufwendigen Konstruktion hat man bereits versucht, leitfähige Spachtelmassen oder auch leitfähige Voranstriche einzusetzen. In diesen Fällen ist jedoch Voraussetzung, daß ein fester Unterboden vorhanden ist, der der DIN 18365 für Fußbodenarbeiten entspricht.In the technical area in particular, therefore, conductive useful coverings have already been used, in which an earthed copper strip construction, in particular a copper network, is arranged under the actual top cover. In the case of PVC tiles, it is necessary in this case to lay the nets or intersecting copper strips in such a way that the copper strips cross in the middle of the tiles, so that a particularly electrically conductive point is arranged under the middle of the tile. To simplify this rather complex construction, attempts have already been made to use conductive fillers or use conductive primers. In these cases, however, it is a prerequisite that there is a firm sub-floor that complies with DIN 18365 for floor work.

Um die Voraussetzungen zur Verlegung eines gut leitfähigen Fußbodens zu schaffen, mußten daher die alten Beläge völlig entfernt werden. Dies ist jedoch mit erheblichem Aufwand verbunden, da Klebstoffreste leicht am Unterboden haften und insbesondere wenn sie älter sind, nur schwierig entfernt werden können. Oft hat man daher in Kauf nehmen müssen, den Unter­boden zum Teil mechanisch zu entfernen, ein Vorgang, der mit Lärm- und Staubentwicklung verbunden ist.In order to create the conditions for laying a good conductive floor, the old coverings had to be removed completely. However, this is associated with considerable effort, since adhesive residues easily adhere to the sub-floor and, particularly when they are older, can be removed only with difficulty. It has therefore often been necessary to accept mechanical removal of the sub-floor, a process that is associated with noise and dust.

Die Aufgabe der vorliegenden Erfindung bestand also zunächst darin, ein neues Verfahren bzw. eine neue Konstruktion eines elektrisch leitfähigen Fußbodens zu finden, der ohne aufwendiges Entfernen der alten Fußbodenkonstruktion aufgebracht werden kann. Die mit den üblichen Mitteln aufzubringende Konstruktion aus Kupferbändern und Kupferdrahtnetzen mußte also verlassen werden und eine Möglichkeit der wünschenswerten Aufbringung eines neuen elektrisch leitfähigen Nutzbelages auf einen nicht zu entfernenden Altbelag gefunden werden.The object of the present invention was therefore initially to find a new method or a new construction of an electrically conductive floor, which can be applied without complex removal of the old floor construction. The construction of copper strips and copper wire nets to be applied with the usual means had to be abandoned and a possibility of the desirable application of a new electrically conductive useful covering to an old covering that could not be removed had to be found.

Diese Aufgabe konnte dadurch gelöst werden, daß man auf einen vorhandenen üblichen Nutzbelag, bestehend aus einem Textil- ­oder Kunststoffbelag, ohne diesen zu entfernen, direkt folgende Beläge aufbringt:

  • a) einen mit einseitiger Haftklebeschicht versehenes Verlegevlies mit der Haftschicht auf den vorhandenen Nutzboden und darauf
  • b) einen elektrisch leitfähigen Anstrich sowie
  • c) einen elektrisch leitfähigen Kleber und zuletzt
  • d) einen antistatisch ausgerüsteten bzw. elektrisch leitfähigen Nutzboden.
This object could be achieved by directly applying the following coverings to an existing customary cover, consisting of a textile or plastic cover, without removing it:
  • a) a laying fleece provided with a one-sided pressure-sensitive adhesive layer with the adhesive layer on and on the existing useful floor
  • b) an electrically conductive paint and
  • c) an electrically conductive adhesive and last
  • d) an antistatic or electrically conductive floor.

Gegenstand des vorliegenden Schutzrechts ist somit eine elektrisch leitfähige Fußbodenkonstruktion, die auf einem bereits vorhandenen, nicht mehr voll funktionsfähigen Altbelag (A) einen folgenden elektrisch leitfähigen neuen Nutzbodenbelag (B) aufweist, der wie folgt von der Oberseite des Altbelags an folgenden Aufbau hat:

  • a) ein mit einseitiger Haftklebeschicht versehenes Verlegevlies mit der Haftschicht auf den vorhandenen Nutzboden (A) und darauf
  • b) ein elektrisch leitfähiger Anstrich sowie
  • c) ein elektrisch leitfähiger Kleber und zuletzt
  • d) einen antistatisch ausgerüsteten bzw. elektrisch leitfähigen Nutzboden.
The subject of the present industrial property right is therefore an electrically conductive floor construction that has the following electrically conductive new useful floor covering (B) on an existing, no longer fully functional old covering (B), which has the following structure from the top of the old covering as follows:
  • a) a laying fleece provided with a one-sided adhesive layer with the adhesive layer on the existing useful floor (A) and on top
  • b) an electrically conductive paint and
  • c) an electrically conductive adhesive and last
  • d) an antistatic or electrically conductive floor.

Das einseitig mit einer Haftkleberschicht versehene Verlegevlies (a) ist vorzugsweise ein Wirrvlies aus Polypropylen-, Poly­ethylen-, Polyterephthalat- oder Polyamidfasern. Das gesamte Kunststoffvlies sollte ein Gewicht zwischen etwa 40 g/m² und etwa 250 g/m², insbesondere von 60 bis 120 g/m², aufweisen. Als Haftklebebeschichtung kommt insbesondere eine Dispersion in Frage, deren Filme eine starke Oberflächenklebrigkeit haben.The laying fleece (a) provided on one side with a pressure-sensitive adhesive layer is preferably a random fleece made of polypropylene, polyethylene, polyterephthalate or polyamide fibers. The entire plastic fleece should have a weight between about 40 g / m² and about 250 g / m², in particular from 60 to 120 g / m². A dispersion whose films have a high surface tack is particularly suitable as a PSA coating.

Dieses elektrisch nicht leitende Kunststoffvlies bzw. nur relativ schlecht leitende Kunststoffvlies wird als erstes mit einer leitfähigen Beschichtung versehen, die in Form eines Anstrichs aufgebracht wird. Als Wirksubstanz enthält dieser leitfähige Anstrich (Vorstrich) Ruß oder Graphit. Als Bindemittel werden dabei in erster Linie synthetische oder auch Naturlatices verwendet. Bewährt ist der Einsatz von Polychloropren- oder Polybutadienstyrol oder Polybutadienacrylnitrillatex. Zweckmäßig enthalten sie noch Kolophoniumderivate oder sonstige als "Klebrigmacher" bekannte Kohlenwasserstoffe oder Terpen- oder Balsamharz in dispergierter Form. Die Mitverwendung von üblichen Hilfsstoffen wie Zinkoxid, Kreide oder Bariumsulfat ist möglich. Auch die vorgenannten die Leitfähigkeit vermittelnden Stoffe werden zweckmäßig als handelsübliche Dispersionen verwendet, wobei natürlich die üblichen Netzmittel und Emulga­toren im System enthalten sein müssen. Den Vorstrich, der mit der Rolle oder durch Spritzen aufgetragen werden kann, läßt man je nach Temperatur und Luftbewegung etwa 3 bis 24 Stunden, vorzugsweise 5 bis 12 Stunden trocknen.This electrically non-conductive plastic fleece or only relatively poorly conductive plastic fleece is first provided with a conductive coating which is applied in the form of a coat of paint. This conductive paint (primer) contains carbon black or graphite as the active substance. Primarily synthetic or natural latices are used as binders. The use of polychloroprene or polybutadiene styrene or polybutadiene acrylonitrile latex has proven its worth. They expediently also contain rosin derivatives or other hydrocarbons or terpene or balsam resin in dispersed form known as "tackifiers". It is also possible to use conventional additives such as zinc oxide, chalk or barium sulfate. The aforementioned also imparting conductivity Substances are expediently used as commercially available dispersions, the usual wetting agents and emulsifiers naturally having to be present in the system. The primer, which can be applied by roller or by spraying, is allowed to dry for about 3 to 24 hours, preferably 5 to 12 hours, depending on the temperature and air movement.

Auf diesen Vorstrich wird dann der Kleber aufgetragen. In dem Kleber oder aber bereits in dem Vorstrich werden zwecks elektrischer Erdung etwa 1 bis 2 m lange dünne Kupferbänder eingelegt. Dadurch soll dann eine einwandfreie Ableitung der durch Begehen von Personen aufgebrachte Ladung gewährleistet sein. Es ist ausreichend, wenn man auf etwa 20 bis 35 m² ein Kupferband einlegt. Das Band selbst soll etwa 0,05 bis 0,25 mm dick sein. Eine mittlere Dicke innerhalb der vorstehenden Grenzen sowie eine Breite von 5 bis 15 mm ist ausreichend. Die gesamte Fußbodenkonstruktion wird durch Einkleben von dünnen, etwa 1 m langen Kupferbändern für jeweils 30 m² geerdet. Die elektrisch leitfähigen Klebstoffe, welche für das neue Ver­fahren bzw. zum Aufbau der neuen Konstruktion verwendet werden, sollen eine leitfähig machende Substanz wie Ruß, Graphit, Kupfer oder evtl. Silberpulver enthalten.The adhesive is then applied to this primer. In the adhesive or even in the primer, thin copper strips about 1 to 2 m long are inserted for electrical grounding. This is to ensure proper discharge of the load caused by people walking on it. It is sufficient to insert a copper tape on about 20 to 35 m². The tape itself should be about 0.05 to 0.25 mm thick. An average thickness within the above limits and a width of 5 to 15 mm is sufficient. The entire floor construction is grounded by gluing thin, approximately 1 m long copper strips for 30 m² each. The electrically conductive adhesives which are used for the new process or for the construction of the new construction should contain a conductive substance such as carbon black, graphite, copper or possibly silver powder.

Als Bindemittel für den eigentlichen Klebstoff haben sich wäßrige Dispersionen von Polyacrylsäureestern, insbesondere Copoly­merisate aus Acrylsäureestern mittlerer Kettenlänge (C3-8) und Vinylacetat, als günstig erwiesen. Auch kann man Copolymerisate mit überwiegenden Anteilen aus Vinylacetat und untergeordneten Mengen an Ethylen, Propylen und/oder Acrylsäureestern ver­wenden. Auch der Einsatz von Latices aus natürlichen oder synthetischen Elastomeren, z.B. aus Polystyrolbutadien, ist möglich. Derartige Grunddispersionen sollten auch die für Klebstoff-Systeme typischen weiteren Hilfsstoffe zur Konservierung, Alterungsschutzmittel und Füll­stoffe, z.B. Kreide, Quarzmehl, Bariumsulfat, Zinkoxid oder Titandioxid enthalten, welche sich direkt vorteilhaft auf die Festigkeit bzw. den Widerstand gegen Belastung der Klebefuge auswirken. Der Ruß sollte als handelsübliche Dispersion dem Klebstoff zugefügt werden und sollte in einer Menge von etwa 3 bis 1O Gewichtsprozent, bezogen auf Festkörper, vorliegen.Aqueous dispersions of polyacrylic acid esters, in particular copolymers of medium chain acrylic acid esters (C 3-8 ) and vinyl acetate, have proven to be favorable as binders for the actual adhesive. Copolymers with predominant proportions of vinyl acetate and minor amounts of ethylene, propylene and / or acrylic acid esters can also be used. It is also possible to use latices made of natural or synthetic elastomers, such as polystyrene butadiene. Such basic dispersions should also be the typical ones for adhesive systems Preservatives for preservation, anti-aging agents and fillers, e.g. chalk, quartz powder, barium sulfate, zinc oxide or titanium dioxide, which have a direct beneficial effect on the strength or resistance to stress on the adhesive joint. The carbon black should be added to the adhesive as a commercially available dispersion and should be present in an amount of approximately 3 to 10 percent by weight, based on solids.

In den mittels eines üblichen Zahnspachtels oder auf sonst bekannte Weise in einer Menge von 100 bis 600 g/m², ins­besondere 250 bis 500 g/m² (naß), aufgetragenen Klebstoff, sollte nach kurzer Verweildauer der eigentliche Fußbodenbelag eingelegt werden.In the adhesive applied by means of a conventional toothed spatula or in a known manner in an amount of 100 to 600 g / m², in particular 250 to 500 g / m² (wet), the actual floor covering should be inserted after a short period of time.

Selbstverständlich muß der Belag selbst hohe Anforderung an die elektrische Leitfähigkeit erfüllen. Als elektrisch leitfähige Elastomerbeläge bzw. elastische Fußbodenbeläge sind ruß- oder graphithaltige PVC- und Gummibeläge im Einsatz. Antistatische Fußbodenbeläge werden sowohl auf der Basis PVC als auch textile Bodenbeläge hergestellt. Antistatische PVC-Beläge enthalten Feuchte haltende Chemikalien, während antistatische Textilbeläge unter Verwendung von Stahlfasern und von Kohlenstoffasern herstellbar sind.Of course, the covering itself has to meet high electrical conductivity requirements. Carbon black or graphite-containing PVC and rubber coverings are used as electrically conductive elastomer coverings or elastic floor coverings. Antistatic floor coverings are made on the basis of PVC as well as textile floor coverings. Antistatic PVC coverings contain moisture-retaining chemicals, while antistatic textile coverings can be produced using steel fibers and carbon fibers.

Beispiel 1example 1

Der Untergrund bestand aus einem Velourteppichboden mit Juterücken, der auf dem Estrich fest verklebt war. Mittels eines Staubsaugers wurde der Teppich sorgfältig gesäubert.The surface consisted of a velor carpet with a jute back, which was firmly glued to the screed. The carpet was carefully cleaned using a vacuum cleaner.

Zunächst wurde ein Polypropylenvlies von 75 g/m² Flächengewicht einer einseitigen Haftklebebeschichtung (150 g trocken/m²) aufgebracht. Der Haftklebestoff bestand aus einem Carboxyl­gruppen enthaltenden Acrylsäureester-Copolymerisat (Acronal V 205, BASF). Die Dispersion hatte 70 % Feststoffgehalt, pH-Wert 4 und 1200 mPa·s bei 23 °C (Contraves-Rheometer).First, a polypropylene fleece of 75 g / m² basis weight of a one-sided PSA coating (150 g dry / m²) was applied. The pressure sensitive adhesive consisted of an acrylic acid ester copolymer (Acronal V 205, BASF) containing carboxyl groups. The dispersion had a solids content of 70%, pH 4 and 1200 mPa · s at 23 ° C. (Contraves rheometer).

Auf das Vlies wurde dann der elektrisch leitende Anstrich mit einer Rolle in einer Menge von 200 g (naß) auf 1 m² aufgetragen. Die Dispersion war zusammengesetzt aus 42 Gew.-% einer Poly­chloropren-Dispersion (Neoprene-Latex 115 DuPont), 30 Gew.-% Naturharzdispersion (Kolophoniumderivate-Dispersion Nr. 5786 der Hercules) sowie 28 Gew.-% einer 25 %igen Ruß­dispersion (Derussol AN Degussa). Sie enthielt weiterhin die üblichen Alterungsschutzmittel, Konservierungsstoffe und Schutzkolloide. Der pH-Wert lag bei 9. Ein getrockneter Anstrich hatte nach DIN 53276 einen Widerstand von weniger als 3 · 10⁵ Ohm.The electrically conductive paint was then applied to the fleece with a roller in an amount of 200 g (wet) over 1 m². The dispersion was composed of 42% by weight of a polychloroprene dispersion (Neoprene latex 115 DuPont), 30% by weight of natural resin dispersion (rosin derivative dispersion No. 5786 from Hercules) and 28% by weight of a 25% carbon black dispersion ( Derussol AN Degussa). It also contained the usual anti-aging agents, preservatives and protective colloids. The pH was 9. A dried paint had a resistance of less than 3 · 10⁵ Ohm according to DIN 53276.

In den noch feuchten Anstrich wurde in dem 30 m² Fläche aufweisenden Proberaum noch ein 1 m langes Kupferband der Abmessung 1 m × 0,2 mm eingelegt, um später geerdet zu werden.A 1 m long copper tape measuring 1 m × 0.2 mm was placed in the still wet paint in the 30 m² rehearsal room in order to be grounded later.

Nach dem Auftrocknen des Anstrichs (12 Stunden) wurde dann ein elektrisch leitender Klebstoff mit dem Zahnspachtel (A3: Zahnlückentiefe 1,65 mm, Zahnlückenbreite 1,5 mm, Zahnbrückenbreite O,5 mm) in einer Menge von 300 g/m² (naß) aufgetragen. Der Klebstoff hatte folgende Zusammensetzung:
25 Gew.-%wäßrige 60%ige Dispersion eines Copolymerisats von Acrylestern mit Vinylacetat (Handelsprodukt Aeronal V 303 BASF)
2 Gew.-%Monobutylen von Triethylenglykol
4 Gew.-% Xylol
10 Gew.-%Kolophonium (dispergiert)
18 Gew.-% Kreide
9 Gew.-% Quarzmehl
32 Gew.-% Rußdispersion (25 Gew.-% als Handelsprodukt Derussol AN1-25/II der Degussa)After the paint had dried on (12 hours), an electrically conductive adhesive was then applied with the notched trowel (A3: tooth space depth 1.65 mm, tooth space width 1.5 mm, Dental bridge width 0.5 mm) applied in an amount of 300 g / m² (wet). The adhesive had the following composition:
25% by weight aqueous 60% dispersion of a copolymer of acrylic esters with vinyl acetate (commercial product Aeronal V 303 BASF)
2 wt% monobutylene of triethylene glycol
4% by weight xylene
10% by weight rosin (dispersed)
18% by weight of chalk
9% by weight quartz flour
32% by weight carbon black dispersion (25% by weight as a commercial product Derussol AN1-25 / II from Degussa)

Dieser Klebstoff hatte nach dem Auftrocknen einen Widerstand von weniger als 3 ·10⁵ Ohm. In das noch feuchte Klebstoffbett wurden dann elektrisch leitfähige PVC-Platten von 2 mm Stärke (Mipolam R 480 CE) der Abmessung 60,8 × 60,8 cm eingelegt. Nach 1 Woche wurde bei dieser Fußbodenkonstruktion die Leit­fähigkeit nach DIN mit 1 × 10⁶ Ohm gemessen.This adhesive had a resistance of less than 3 · 10⁵ ohms after drying. Electrically conductive PVC sheets of 2 mm thickness (Mipolam R 480 CE) with dimensions of 60.8 × 60.8 cm were then placed in the still moist adhesive bed. After 1 week, the conductivity of this floor construction was measured to be 1 × 10⁶ ohms.

Beispiel 2Example 2

Vorhanden war ein Nadelvlies-Nutzboden, der sorgfältig mit dem Staubsauger gesäubert wurde. Aufgebracht wurde das einseitig mit Haftklebstoff ausgerüstete Verlegevlies von Beispiel 1. Darauf wurde mit der Rolle der Ruß enthaltende Polychloropren-Anstrich des Beispiels 1 aufgetragen. Nach dessen Trocknen über Nacht trägt man den leitfähigen Teppichklebstoff mit dem Spachtel (B1: Zahnlückentiefe 2,1 mm, Zahnlückenbreite 2,3 mm und Zahn­brückenbreite 2,7 mm) auf; der Klebstoffauftrag beträgt 400 g/m² naß.
Der leitfähige Klebstoff die gleiche Zusammensetzung wie im Beispiel 1.There was a needle-fleece floor that was carefully cleaned with a vacuum cleaner. The laying fleece of Example 1, which had been provided with pressure-sensitive adhesive on one side, was applied to the soot-coated polychloroprene coating from Example 1. After it has dried overnight, the conductive carpet adhesive is applied with the spatula (B1: tooth gap depth 2.1 mm, tooth gap width 2.3 mm and tooth bridge width 2.7 mm); the adhesive application is 400 g / m² wet.
The conductive adhesive has the same composition as in Example 1.

In der nachfolgenden Abbildung haben die verwendeten Zeichen folgende Bedeutung:

  • A = vorhandener Nutzboden
  • B = erfindungsgemäßer Aufbau
  • Cu= Kupferband
  • a = Verlegevlies mit Haftkleberbeschichtung
  • b = elektrisch leitfähiger Vorstrich bzw. Anstrich
  • c = elektrisch leitfähiger Kleber
  • d = Nutzboden (neu)
In the figure below, the characters used have the following meaning:
  • A = existing floor
  • B = construction according to the invention
  • Cu = copper tape
  • a = laying fleece with pressure sensitive adhesive coating
  • b = electrically conductive primer or paint
  • c = electrically conductive adhesive
  • d = usable floor (new)

Claims (9)

1) Elektrisch leitfähige Fußboden-Konstruktion, dadurch gekennzeichnet, daß auf einem vorhandenen üblichen Nutzbelag, bestehend aus einem Textil- oder Kunststoffbelag, ohne diesen zu entfernen, direkt folgende Beläge aufliegen: a) ein mit einseitiger Haftklebeschicht versehenes Verlegevlies mit der Haftschicht auf den vorhandenen Nutzboden und darauf b) ein elektrisch leitfähigen Vorstrich bzw. Anstrich sowie c) ein elektrisch leitfähigen Kleber und zuletzt d) ein antistatisch ausgerüsteter bzw. elektrisch leitfähiger Nutzboden. 1) Electrically conductive floor construction, characterized in that the following coverings lie directly on an existing customary cover, consisting of a textile or plastic cover, without removing it: a) a laying fleece provided with a one-sided adhesive layer with the adhesive layer on the existing useful floor and on top of it b) an electrically conductive primer or paint and c) an electrically conductive adhesive and last d) an antistatic or electrically conductive floor. 2) Elektrisch leitfähige Fußboden-Konstruktion nach Anspruch 1, dadurch gekennzeichnet, daß auf 20 bis 35 m² des Fußbodens ein Kupferband der Abmessung 0,05 bis 0,25 mm × 5 bis 15 mm und einer Länge von 1 bis 2 m in dem Vorstrich und/oder die Klebstoffschicht eingelegt ist.2) Electrically conductive floor construction according to claim 1, characterized in that on 20 to 35 m² of the floor a copper tape of the dimensions 0.05 to 0.25 mm × 5 to 15 mm and a length of 1 to 2 m in the primer and / or the adhesive layer is inserted. 3) Elektrisch leitfähige Fußboden-Konstruktion nach den An­sprüchen 1 und 2, dadurch gekennzeichnet, daß der Vorstrich bzw. Anstrich aus Ruß enthaltendem Polychloropren besteht.3) Electrically conductive floor construction according to claims 1 and 2, characterized in that the primer or paint consists of soot-containing polychloroprene. 4) Elektrisch leitfähige Fußboden-Konstruktion nach den An­sprüchen 1 bis 3, dadurch gekennzeichnet, daß der leitfähig eingestellte Klebstoff rußhaltige Dispersionsklebstoffe auf Acrylatester-Copolymerisat-Basis, auf Basis von Vinylacetat-­Acrylester-Copolymeridispersionen oder auf Basis von synthetischer (z.B. SBR) oder natürlichen Latices besteht.4) Electrically conductive floor construction according to claims 1 to 3, characterized in that the conductive adhesive soot-containing dispersion adhesives based on acrylate ester copolymer, on the basis of vinyl acetate-acrylic ester copolymer dispersions or on the basis of synthetic (eg SBR) or natural Latices. 5) Verfahren zur Herstellung einer elektrisch leitfähigen Fußbodenkonstruktion nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß man auf einen üblichen Nutzboden, bestehend aus Textil- oder Kunststoffbelag, ohne diesen zu entfernen, direkt folgende Beläge aufgebracht werden: a) ein mit einseitiger Haftkleberschicht versehenes Verlegevlies mit der Haftschicht auf den vorhandenen Nutzboden und darauf b) ein elektrisch leitfähiger Vorstrich bzw. Anstrich sowie c) ein elektrisch leitfähiger Kleber und zuletzt d) ein antistatisch ausgerüsteter bzw. elektrisch leitfähiger Nutzboden. 5) Process for producing an electrically conductive floor construction according to one of claims 1 to 4, characterized in that the following coverings are applied directly to a customary useful floor consisting of textile or plastic coverings without removing them: a) a laying fleece provided with a one-sided pressure-sensitive adhesive layer with the adhesive layer on and on the existing useful floor b) an electrically conductive primer or paint and c) an electrically conductive adhesive and last d) an antistatic or electrically conductive floor. 6) Verfahren zur Herstellung einer elektrisch leitfähigen Fußbodenkonstruktion nach Anspruch 5, dadurch gekenn­zeichnet, daß man auf 20 bis 35 m² des Fußbodens in den Vorstrich oder Anstrich ein Kupferband der Abmessung O,O5 bis O,25 mm × 5 bis 15 mm und einer Länge von 1 bis 2 m ein­legt.6) Method for producing an electrically conductive floor construction according to claim 5, characterized in that a copper tape of the dimensions O, O5 to O, 25 mm × 5 to 15 mm and a length on 20 to 35 m² of the floor in the primer or paint from 1 to 2 m. 7) Verfahren zur Herstellung einer elektrisch leitfähigen Fußbodenkonstruktion nach Ansprüchen 5 und 6, dadurch ge­kennzeichnet, daß man ein Ruß enthaltendes Klebemittel auf Basis Polychloropren einsetzt.7) Method for producing an electrically conductive floor construction according to claims 5 and 6, characterized in that an adhesive containing carbon black based on polychloroprene is used. 8) Verfahren zur Herstellung einer elektrisch leitfähigen Fuß­bodenkonstruktion nach Ansprüchen 5 bis 7, dadurch gekenn­zeichnet, daß man als leitfähig eingestellten Klebstoff eine Ruß enthaltende Dispersion auf Basis von Vinylacetat-Acrylester-­Copolymerisaten oder sonstigen modifizierten Polyacryl­säureestern oder synthetischen Latices (Polychloropren, Polybutadienstyrol) verwendet.8) Process for producing an electrically conductive floor construction according to claims 5 to 7, characterized in that a dispersion containing carbon black based on vinyl acetate-acrylic ester copolymers or other modified polyacrylic acid esters or synthetic latices (polychloroprene, polybutadiene styrene) is used as the conductive adhesive. 9) Verfahren zur Herstellung einer elektrisch leitfähigen Fuß­bodenkonstruktion nach Ansprüchen 5 bis 8, dadurch gekenn­zeichnet, daß handelsübliche, nicht leitfähig eingestellte Dispersionsklebstoffe auf nach unter 8 genannter Rohstoffbasis mit leitfähig machenden Zusätzen am Ort des Verlegens leitfähig eingestellt werden.9) Method for producing an electrically conductive floor construction according to claims 5 to 8, characterized in that commercially available, non-conductive dispersion adhesives are set to conductive according to 8 raw material base with conductive additives at the place of installation.
EP19860117324 1985-12-21 1986-12-12 Electrically conductive floor construction Expired - Lifetime EP0228004B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86117324T ATE72086T1 (en) 1985-12-21 1986-12-12 ELECTRICALLY CONDUCTIVE FLOOR CONSTRUCTION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3545760 1985-12-21
DE19853545760 DE3545760A1 (en) 1985-12-21 1985-12-21 ELECTRICALLY CONDUCTIVE FLOOR CONSTRUCTION

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EP0228004A2 true EP0228004A2 (en) 1987-07-08
EP0228004A3 EP0228004A3 (en) 1988-11-30
EP0228004B1 EP0228004B1 (en) 1992-01-22

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US (1) US4770916A (en)
EP (1) EP0228004B1 (en)
AT (1) ATE72086T1 (en)
DE (2) DE3545760A1 (en)

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EP0228004A3 (en) 1988-11-30
US4770916A (en) 1988-09-13
DE3545760C2 (en) 1989-10-05
ATE72086T1 (en) 1992-02-15
EP0228004B1 (en) 1992-01-22
DE3545760A1 (en) 1987-06-25
DE3683616D1 (en) 1992-03-05

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