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Use of dispersion adhesive-coated polyvinyl chloride sealing films for producing a seal

A polyvinyl chloride, dispersion technology, applied in the direction of adhesive heating bonding method, adhesive type, polyurea/polyurethane adhesive, etc., can solve the problem of unsuitable adhesive, loss of adhesive connection, Long time and other problems, to achieve the effect of reducing unsealed sources, reducing vulnerability, and simple manufacturing

Inactive Publication Date: 2013-08-21
SIKA TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the bonding of such PVC sealing webs to substrates has so far not been successful in practice, since it has been shown that the adhesive required for such bonding absorbs plasticizers from the PVC sealing Intrinsically, its mechanical properties and other technical properties (especially also adhesion) are strongly negatively affected, resulting in the loss of adherent junctions in the shortest possible time
[0005] Furthermore, many known adhesives are not suitable because they take a relatively long time to join due to, for example, participating in crosslinking reactions

Method used

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  • Use of dispersion adhesive-coated polyvinyl chloride sealing films for producing a seal
  • Use of dispersion adhesive-coated polyvinyl chloride sealing films for producing a seal
  • Use of dispersion adhesive-coated polyvinyl chloride sealing films for producing a seal

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Experimental program
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Embodiment

[0096] Hereinafter, the present invention is explained based on examples.

[0097] The adhesive compositions given in Table 1 were prepared. Comparative adhesive Ref. 1 is Sarnacol 2170 from Sika Sarnafil AG, Switzerland, which is a commercially available solvent-based contact adhesive based on synthetic rubber. An adhesive was also prepared with Ref. 2, which is a solution of thermoplastic polyurethane in a solvent. The following EVA dispersions and / or polyester dispersions are used in the dispersion adhesives 1 to 5 according to the invention:

[0098] EVA dispersion 1: EVA aqueous dispersion. Water content: 48% by weight. EVA content: 52% by weight, glass transition temperature: 6° C., particle diameter: 1 μm.

[0099] Polyester Dispersion 1: Anionic polyurethane aqueous dispersion based on polyester polyol. Polyurethane content: 40% by weight, water content: 60% by weight, viscosity 150m Pas (DIN53018)

[0100]

[0101] Table 1: Composition and results.

[0102] ...

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Abstract

The present invention relates to a method for sealing a civil engineering or structural engineering structure. The method includes in particular the use of non-reactive dispersion adhesive compositions. This method in particular has the advantages that good and long-lasting adhesion can be achieved quickly, and that in particular the non-reactive dispersion adhesives that are used have a low tendency to absorb plasticizers present in the PVC sealing film such that the present method is excellently suitable for assuring long-lasting bonding between PVC films and a wide variety of substrates.

Description

technical field [0001] The invention relates to the field of sealing of underground or aboveground structures and the field of dispersion adhesives. Background technique [0002] PVC sealing films have been known for a long time. It has also long been used for sealing roofs and roof structures. Traditionally, this foil is laid on the roof as a sealing web and welded to each other. For fastening such webs, mainly mechanical anchors, such as nails, are currently used. The guarantee of tightness is of course a big problem here. [0003] The PVC sealing web contains a large amount of plasticizers to permanently ensure the flexibility of the sealing web. [0004] However, the bonding of such PVC sealing webs to substrates has so far not been successful in practice, since it has been shown that the adhesive required for such bonding absorbs plasticizers from the PVC sealing Intrinsically, their mechanical and other technical properties (especially also adhesiveness) are stron...

Claims

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Application Information

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IPC IPC(8): E04D5/14E04B1/66B32B27/08B32B27/30C08G18/08C09J175/04C09J175/06
CPCC09J5/06C09J175/04C09J2400/123C09J2427/006C09J2475/00E04B1/66E04D5/149C08G18/0866C08G18/42C08L23/0853E04D5/148E04B1/665B29C66/45B32B27/04C09J175/14E04D11/02
Inventor M·德米希A·布赫霍尔茨C·博塞M·林嫩布林克
Owner SIKA TECH AG