DE8030442U1 - SEALING ROOF FOR ROOFS - Google Patents

Description

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The innovation relates to a waterproofing membrane for Roofs and for moisture insulation in parts of buildings, with the membrane consisting of a top layer of synthetic rubber types EPDM, Buna N or CR, a middle carrier layer made of fleeces, scrims or fabrics made of glass or Synthetic fibers and a lower adhesive layer.

Geomembrane is known according to the structure outlined above. Because of the types of rubber used, these membranes are very weather-resistant and also show a long service life. It is significantly higher than with conventional bitumen roofing membranes, which are essentially made of a fairly inexpensive carrier layer, e.g. raw felt or glass fleece and a top layer each made of bitumen. The carrier layer is impregnated with a bitumen compound before the bitumen is produced. After completion

$; the top layer is covered with slate chippings or the like

Κ! Material sprinkled to the immediate exposure to the weather

\ to reduce the upper bitumen sch! cht. According to experience

; does not hold this protective layer indefinitely, so that the upper one

Bitumen top layer is exposed to the elements and becomes brittle and cracked. This is a major disadvantage to the waterproofing membranes with a top layer made of the weather-resistant vulcanized rubber types mentioned. However, it is advantageous that the so-called bitumen roofing membrane is safe by flaming or in the cast-in process and can be easily attached to the base. In particular, the details of this mode of operation will be ; on "Hoch, Flachdächer, Flachdachschäden" Verlagsgesellschaft Rudolf Müller, Cologne, 19731 Section Il "Roof skins" Refer to page 77 ff. For waterproofing membranes with weather-resistant As a rule, adhesives with a relatively complicated mixture structure have been required to date. They also require increased care when laying. Plus, these adhesives are still right as well expensive.

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The task of the innovation is to create an adhesive layer for waterproofing membranes to create, which can be laid quickly and easily on the untreated sub-floor using the flaming method can be.

The solution of this object is that the adhesive layer of a blown asphalt having a softening point of 70 - 9O ⁰ C (BCT), and a thickness η vo 2 has mm.

While different types of bitumen have been used for the bitumen roofing membranes according to the previously known structure, only one bitumen can be used for the rubber-based waterproofing membrane according to the invention if it is within the specified softening point of approx. 70-90 ° C. Bitumens with a softening point above approx. 110 ° C turn out to be too hard during handling and processing. Such adhesive layers also lack the required adhesive strength. It is also important that a _{bitumen obtained from the residues of N} petroleum distillation in the blowing process is used. The specified range of the softening temperature is also important for ensuring that, on the one hand, a sufficiently rapid liquefaction can be achieved in the event of a flare-up so that the rubber sheet is not damaged by the action of heat. On the other hand, this area is high enough to keep softening within limits, even with intense solar radiation, so that it does not become detached and it is still possible to walk on the roofing membrane.

Another consideration is the layer thickness of approx. 2 mm. This thickness can vary between 1.5 and 2.5 mm. The greater thickness is predominantly the lower softening point and the smaller thickness the higher limit value assigned to the softening point.

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This assignment is intended to ensure that the deformation ability of the adhesive layer in the normal state of the Sealing membrane is in an optimal relation to the sealing membrane. This is for manufacturing and hassle free Laying important. It is worth noting here that the rubber sealing membrane is basically clear is more flexible than a corresponding bitumen waterproofing membrane.

But there can also be an assignment of a higher softening point Consideration should be given to thicker layers if the resulting sheet is primarily used for waterproofing of masonry parts is provided. In this case, greater rigidity is desirable. On the other hand, it is high If flexibility of the web is desired, the lower layer thickness with the lower limit of the softening point can also be required of 70 ° C can be combined. This can be the case if, for example, a complicated roof design is to be covered. One Falling below or exceeding the specified softening temperature Be rich must be avoided because otherwise difficulties various types can occur, so that at least one universal application of the sealing membrane is lost goes.

If, however, increased flexibility of the waterproofing membrane is desired, the bitumen can be added to the adhesive layer up to 20% by weight of butadiene styrene block copolymer to add. This increases the flexibility of the Reached orbit without the other physical values falling.

In the case of bitumen, a product can also be used that has a broad melting range within the specified limits having. This material is quite usable, it is even somewhat lower in price in terms of cost.

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Example ;

j The innovation is explained in connection with a, illustration, for example. This provides the cross-section a sealing membrane. The sealing membrane consists of a top layer 1 made of a vulcanized rubber mixture based on EPDH. This layer is I ₁ O mm thick. The mixture

j is as follows:

EVA Ethylenvinylacetatinisohpolyinerisat 70 parts by weight EPDM ethylene propylene diene polymer 30 "

Soot 15 "

j bitumen 50 "

Active filler 70 "

ί Vulcanization aid total of 25 "

The layer 2 consists of a glass fleece layer, which in was soaked in a rubber solution. The components of the Mixture essentially correspond to the mixture according to the

Top layer.

Layer 3 consists of a bitumen layer 1.8 mm thick. The bitumen has a softening point of approx. 8O ⁰ C (RuK)

Claims (1)

Expectations 1.) Sealing membrane for roofs and for Feuchtigkeltaieolierung in building parts, wherein the membrane consists of a top layer of the synthetic rubber types EPDM, Buna N or CR _1, a middle carrier layer of fleeces, nonwovens or fabrics made of glass or synthetic fibers and a lower adhesive layer, characterized in, that the adhesive layer consists of a blown bitumen with a softening point of 70-90 ° C (HuK) and has a viscosity of 85/25 and a thickness of about 2 mm. 2o) sealing membrane according to claim 1, characterized in that the blown urn contains up to 20 % styrene-butadiene block copolymer (SBS). / 2