DE3111481A1 - BENDABLE, MULTI-LAYERED COATING FOR SEALING AND / OR SOUND INSULATION - Google Patents

Description

DESCRIPTION

The invention relates to a flexible, multilayer covering for sealing and / or for sound insulation with a bituminous sub-layer that is provided with a weatherproof, chemical or against various atmospheric contaminants of biological origin is coated with a resistant protective layer. The atmospheric Impurities can be acids, bases, solvents and any precipitate which in the most general sense can go down on a roof.

Because of the various gaseous, liquid or solid emissions that occur continuously or are released into the atmosphere as a result of an accident, one encounters considerable problems everywhere with regard to the tightness of roofs.

The simple bitumen cardboard becomes very aromatic from precipitation or chlorinated solvents are attacked in numerous industrial processes develop. The damaging attack takes place through the progressive dissolution and decomposition of the bitumen. In addition, the oxidizing emissions lead (Sulfur dioxide, various acids) to an embrittlement of the bitumen, and therefore it is necessary to renew the waterproofing of the respective roof surface frequently.

The bituminous sealing foils, which are covered with an aluminum foil, are also quickly attacked by the sulfur dioxide emissions as well as the alkaline and acidic emissions.

Bituminous protective materials have already been proposed in order to survive to ensure this protection in the event of corrosive attacks, for example through the use of stainless steel foils. However, stainless steel is very expensive and has to be used about high rigidity.

Plastic coverings have also been proposed, but they are based on the Construction site are difficult to manage. Among other things, they contain plasticizers, which have a tendency to migrate along the surface and which are sticky Form a layer on which the dust sticks.

The object on which the invention is based is to overcome the disadvantages of the known Avoid coverings, and especially a permanent, corrosion-resistant roof waterproofing to accomplish.

According to the invention, this object is achieved in that, in the case of a covering, the initially mentioned type the protective layer consists essentially of a continuous plastic film, which is previously with a view to any possible contraction has been stabilized.

Further developments of the subject matter of the invention are set out in the subclaims marked.

An exemplary embodiment of the invention is shown in the drawing. Show it:

Fig. 1 is a perspective view of a section of a multilayer

Covering,

Fig. 2 is a perspective view of a covering according to the invention, partially

on average,

FIG. 3 is a perspective view of a further exemplary embodiment of FIG

Invention, partly in section and

4 shows a perspective sectional view of a further exemplary embodiment

according to the invention.

In Fig. 1 is an arrangement made of a plastic film 10, which is free from plasticizers and is resistant to corrosive agents, and a bituminous waterproofing layer 12 is shown forming a sheet or panel which is against all Types of external attack is resistant, the arrangement according to the conventional Process can be used as a roof covering.

During the production of the sealing layer, however, the plastic films experience thermal shock and, as a result, tend to move when performing ' of the process to contract considerably as a result of a "creep effect". From it there are discontinuities and interruptions in the protective layer and the risk of tension at the edges of the laid sheets.

According to the invention, the plastic film must therefore withstand this shrinkage be stabilized, which arises with the implementation of the procedure.

One could consider applying the plastic film to a stiff surface, such as, for example, a glass fiber mat 14 shown in FIG. 1 or an asbestos felt, but there is a risk of incompatibility between the bituminous sub-layer and the adhesive used for this process. In addition, there is still the risk of air pockets under the Plastic sheeting that can cause blisters or pimples.

According to the invention, the plastic film 10 is made with the aid of a reactive adhesive glued to a continuous carrier, the reactive adhesive of course must be completely compatible with the two elements of the lamination, that is, with the plastic film and its carrier material. The continuous Carrier prevents direct contact between the adhesive and the bitumen, and thus prevents the incompatibility symptoms mentioned above.

In an advantageous and preferred manner, the lamination carrier consists of one Metal foil 16, which is shown in Fig. 2 and preferably consists of aluminum. It has a thickness of 9 to 200 micrometers, preferably 20 to 80 micrometers.

A method for lamination of the plastic film 10 on its carrier 16 can be have the following procedural steps:

Coating the support with one dissolved in a solvent Reactive adhesive;

- Evaporation of the solvent in an oven;

Application of the plastic film by calendering at room temperature, in order to prevent the plastic film from deforming, the bond obtained being stronger than the inherent cohesion of the plastic film.

All synthetic films made from thermoplastics or elastomers can be used for this Procedures are used provided that they meet the requirements for protection have grown against harmful atmospheric influences. In advantageous A film made of polyvinyl fluoride or polyvinyl chloride of small thickness, for example a thickness between 10 and 100 micrometers.

The plastic film advantageously has an optimal thickness of 37.5 micrometers on. It must be deformable, resistant to atmospheric attack, chemically inert, and pigmented in the mass without plasticizers.

Because of the technologies commonly used in sealing technology, the The composite complex is provided with an embossing (embossing), or as in Fig. 3 depicted bulged to the areas of dilation and contraction on elementary Reduce sections before applying a coating of reinforced or non-reinforced bitumen using the usual methods of making bitumen coverings is applied.

3 1 11 A 8 1

The stability of this arrangement was demonstrated on a coating produced in this way Experimentally confirmed by subjecting it to a thermal cycle, and it was found that after numerous phases there was no elongation the complex network was also contracted.

The unit produced in this way can with the help of a bitumen bath any carrier can be glued, which is suitable to receive an insulating layer and which has been prepared according to the conventional methods.

In practice, it is useful to have an area 18 at the edge of each track, as shown in Fig. 2 to be provided, which is not covered by the film-carrier complex, and which is used for the lateral overlap by the respective adjacent track.

To prevent the bitumen used for gluing the complex of neighboring Lanes smeared, these are expediently painted over with soapy water up to the edge of the bond, so that the overflowed bitumen from Plastic film can be peeled off without damaging it. The edges on the The ends of the tracks are either protected by a coating that protects against chemical Attack resistant and made, for example, of polyurethane, or they are made by self-adhesive tapes of the complex described above or protected by any other suitable means.

In this way one creates a waterproofing layer with the following advantages:

- The waterproofing bitumen is against the various atmospheric Attacks protected;

the protection is both durable and aesthetically pleasing, while he integrates into the architecture of the building and the landscape;

- The procedure is simple and there is none Risk of cracks or bumps that will create holes;

the complex can adapt to all dimensional changes of the load-bearing Adjust structure;

the outer surface can be cleaned and is under the sole Effect of rainwater, as it were, self-cleaning;

the entire arrangement is due to the metallic carrier layer Fireproof, but if you want, you can use a non-ignitable plastic film,

The composite, consisting of the bituminous sub-layer and the film-carrier complex, can be on its bottom with a thin or thick layer of adhesive be coated with or without an insert, the thickness of which is between a few micrometers and a few millimeters, which enables its application in areas where a flame is present while the method is being carried out could damage the plastic film, or where it is not possible to work with the usual techniques using molten bitumen.

For this type of application, the adhesive substance with a layer 20 is one crimped paper-polyethylene-silicone complex protected from the bituminous Lower layer 12 can be peeled off.

The embossing or corrugation according to FIG. 3 creates the possibility of an extension without substantial tension so that the product can serve to bridge cracks, Line chimneys, gutters, beams or other protrusions and create an aesthetically pleasing insulating layer without paint or other coating.

In addition, the product according to the invention can be used as a sound insulation board on machine parts or structural parts that are exposed to atmospheric attack are used.

Without departing from the concept of the invention, the composite of the plastic film and its carrier can be produced by techniques which are equivalent to the lamination techniques. Thus, this composite complex can be extruded through
Brushing of plastisols or any spraying methods can be produced on the metallic support before the polymerization, the thickness of the film film obtained being between 1 and 500 micrometers.

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Claims (9)

DR. KARL RACKETTE PATENT ADVERTISER Leo-Wohleb-Str. 6 Postfach 131 O D-7BOO Freiburg Dipl.-Phys. Dr.-Ing. Karl Rackotlo Patentanwalt European Patent Attorney European Patent Representative Mandataire en Brevets Europeuns Leo-Wohleb-Strasse 6 Postfach 1 31 O D-78OO Freiburg Telephone: (0761) 3 18 91 Telex: 77 28 28 bawis el Telegrams: Patentservice Freiburg SOPREMA S.A. 14, rue de Saint Nazaire F-67 025 Strasbourg Flexible, multi-layer covering for sealing and / or soundproofing. PATENT CLAIMS 1. Flexible ^ multi-layer covering for sealing and / or for soundproofing with a bituminous undercoat, which is covered with a weatherproof, against various atmospheric pollution of chemical or biological origin is coated with a resistant protective layer, characterized in that that the protective layer (10, 16) consists essentially of a continuous plastic film, which is previously in view of every possible Contraction has been stabilized. 2. Covering according to claim 1, characterized in that the plastic film is stabilized on a metal foil by a method that is selected from a group that involves lamination using an adhesive, extrusion, the application of plastisols to the metal foil, or any spraying method. 3. Covering according to claim 2, characterized in that the metal foil is an aluminum foil. 4. Covering according to one of the preceding claims 2 and 3, characterized in that that the film-carrier unit has an embossing (Fig. 3). 5. Covering according to one of claims 1 to 4, characterized in that that the plastic film consists of polyvinyl chloride. 6. Covering according to one of claims 1 to 5, characterized in that that the plastic film has a thickness between 10 and 100 micrometers, preferably 37.5 micrometers. 7. Covering according to one of claims 2 to 6, characterized in that that the metal foil has a thickness between 9 and 200 micrometers, preferably between 40 and 80 micrometers. 8. Covering according to one of claims 2 to 7, characterized in that that the plastic film is laminated to the metal foil with the aid of a reactive adhesive. 9. Covering according to one of claims 1 to 8, characterized in that that the bituminous sub-layer has a self-adhesive layer on its underside, which is made possible by a peelable composite complex is protected.