Sealing device with improved adhesion

Abstract

#CMT# # / CMT# Sealing agent (1) comprises a barrier layer (2) and an adhesive layer (3) comprising: a polymer, which is polyethylene, polypropylene or a copolymer of ethylene and propylene; a polyolefin-based polymer having at least one functional group of carboxylic acids, hydroxy-groups, anhydrides, acetates and glycidyl methacrylates; and azo-dicarbonamide. #CMT# : # / CMT# Independent claims are also included for: (1) sealing a substrate, comprising applying a sealing agent on a substrate, where the adhesive layer faces the substrate, and heating the adhesive layer to a temperature of 80-600[deg] C; and (2) molding of a sealing agent, comprising connecting the molding with adhesive layer, which is previously heated and fixed with the sealing agent. #CMT#USE : # / CMT# The sealing agent is useful for sealing the substrates (claimed). #CMT#ADVANTAGE : # / CMT# The sealing agent: allows rapid sealing of structures; and ensures good adhesion of the sealing agent on the base. #CMT#DESCRIPTION OF DRAWINGS : # / CMT# The figure shows a schematic representation of the sealing agent. 1 : Sealing agent 2 : Barrier layer 3 : Adhesive layer #CMT#POLYMERS : # / CMT# Preferred Components: The polyolefin-based polymer comprises: maleic anhydride functionalized polyethylene, preferably maleic anhydride functionalized low density polyethylene or maleic anhydride functionalized high density polyethylene; maleic anhydride functionalized polypropylene; maleic anhydride functionalized copolymer of ethylene and propylene; maleic anhydride functionalized ethylene-vinyl acetate copolymer; ethylene-vinyl acetate copolymers; glycidyl-methacrylate-functionalized polyethylene; and ethylene-acrylic acid copolymers. The amount of the polyolefin-based polymer is 1-18 wt.%, preferably 8-12 wt.%. The ratio of azodicarbonamide and polyolefin-based polymer is 0.1-1.2, preferably 0.4-0.6. The amount of azodicarbonamide is 3-7 wt.%, preferably 4-6 wt.%, or 0.5-5 wt.%, preferably 1-3 wt.%. The adhesive layer comprises less than 1 wt.%, preferably 0 wt.% epoxy resin, based on the total weight of the adhesive layer. The barrier layer has a foamed part on the side facing towards the adhesive layer. The adhesive layer is tack-free at 23[deg] C. The substrate is made of asphalt. Preferred Method: The method comprises applying a substrate on the barrier layer of the sealing agent. #CMT#EXAMPLE : # / CMT# No suitable example given.

Description

technical field [0001] The invention relates to the field of sealing of substrates and substrates, in particular in the construction sector. Background technique [0002] Substrates and substrates that must be watertight, especially concrete structures, are used extensively in above-ground and underground constructions. Such substrates and substrates are usually sealed by bituminous webs (-bahnen) or mechanically fastened plastic webs. Due to the thermoplastic behavior, however, asphalt webs are susceptible to temperature fluctuations. In contrast, an elastic plastic web has a constant elastic behavior over a wide temperature range and therefore fulfills its function as a seal even under extreme temperature conditions. The combination of plastic web and bitumen is not used due to numerous disadvantages. One of the problems here is in particular that a good adhesive bond must exist between the plastic web combined with the bitumen and the substrate or substrate, which of c...

AI Technical Summary

Problems solved by technology

[0003] Said systems also have the great disadvantage that in order to completely melt the bitumen a great thermal power must be generated, which usually requires the use of an open flame

On the one hand this is expensive, on the other hand the uncontrollable high thermal output of the open flame can cause smoldering (Schwelbrand)

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