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Waterproofing system

A system, solid particle technology, applied in the direction of hydraulic layered products, ceramic molding machines, household appliances, etc., to achieve complete and permanent bonding effect

Active Publication Date: 2020-02-07
SIKA TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] It has surprisingly been found that waterproofing systems comprising a functional layer S1 comprising at least one thermoplastic polymer P1 and at least one dispersed in a composition comprising at least A solid particle filler F in a continuous thermoplastic phase of a thermoplastic polymer P1 with a certain surface roughness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0201] The materials shown in Table 1 were used in the examples.

[0202] Table 1. Materials used in the experiments

[0203]

[0204] * EVA, ethylene vinyl acetate copolymer

[0205] Preparation of waterproofing system

[0206] An exemplary and reference two-layer waterproofing system comprising a functional layer and a barrier layer Ex1- Ex5 and Ref-1. In all two-layer waterproofing systems, a thermoplastic film based on an EVA-LLDPE polymer blend was used as the barrier layer.

[0207] A first mixture containing functional layer components and a second mixture containing barrier layer components are melt processed in first and second twin-screw extruders and coextruded over each other through a common flat die to produce a bilayer film, which is then cooled between calender rolls. Adjust the gap between the calender chill rolls to be slightly smaller than the total thickness of the extruded film to bond the layers together. The thickness of the functional layer ...

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Abstract

The invention is directed to a waterproofing system comprising a functional layer S1 comprising 10-80 wt.% of at least one thermoplastic polymer P1 and 10-80 wt.% of at least one solid particulate filler F, wherein the surface of the functional layer S1 has an Auto-correlation length of waviness W(Sal) of at least 50 microns. The invention is also directed to a method for producing a waterproofingsystem and to the use of a mechanical surface treatment step to increase the waviness factor, determined as the ratio of the Root mean square roughness of waviness W(Sq) to the square of the Auto-correlation length of waviness W(Sal), of a surface of a functional layer S1.

Description

technical field [0001] The present invention relates to waterproofing systems for the construction industry, for example for basements, roofs and tunnel applications, to protect concrete structures from water penetration. Background technique [0002] Waterproofing systems consisting of waterproofing membranes are commonly used in the construction industry to seal basements, underground surfaces or buildings against water ingress. [0003] Prior art waterproofing membranes are monolayer or multilayer systems comprising at least one polymer-based barrier layer to provide watertightness. Typical polymers used in barrier layers include thermoplastics such as plasticized polyvinyl chloride (p-PVC) and thermoplastic polyolefins (TPO) or elastomers such as ethylene-propylene diene monomer (EPDM) and crosslinked Chlorosulfonated polyethylene (CSPE). One of the disadvantages of polymer-based barrier layers is their poor bonding properties. They generally exhibit low bond strength...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/30B32B27/34B32B27/36B32B13/12
CPCB32B13/12B32B27/08B32B27/30B32B27/302B32B27/304B32B27/34B32B27/36B32B2264/10B32B2264/101B32B2264/102B32B2264/104B32B2264/107B32B2307/538B32B2307/7265B32B2419/06B32B2581/00B28B3/22B29C43/24B29C2793/009B29K2023/0625B29K2023/083C04B24/2635C04B28/04C04B41/009C04B41/5346C04B41/72C04B2103/40C04B2111/27
Inventor D·卡维泽尔W-R·哈克H·阿克曼
Owner SIKA TECH AG