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Method for adhesively bonding rubber-based thermoplastic substrates

A technology of thermoplastic polymers and substrates, applied in the direction of bonding methods, rubber layered products, chemical instruments and methods, etc., can solve problems such as difficult adhesive bonding, low-energy surface structure, and difficult adhesive properties

Active Publication Date: 2021-09-10
SIKA TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they are notoriously difficult to bond via adhesives due to their low-energy surface structure
They can be bonded to each other by heat welding or by using mechanical methods, but whenever they should be bonded directly to another substrate, such as concrete or wood, obvious difficulties arise regarding the properties of commonly available adhesives
In addition, in the case of mechanical connections, the sealing effect, for example against water, is often unsatisfactory

Method used

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  • Method for adhesively bonding rubber-based thermoplastic substrates
  • Method for adhesively bonding rubber-based thermoplastic substrates
  • Method for adhesively bonding rubber-based thermoplastic substrates

Examples

Experimental program
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Embodiment approach

[0065] According to one or more embodiments, mixture E consists of:

[0066] a) 25-99% by weight, preferably 35-98% by weight, more preferably 45-97% by weight, even more preferably 55-96% by weight, most preferably 65-95% by weight of at least one thermoplastic polymer E1 and

[0067] b) 1-75% by weight, preferably 2-65% by weight, more preferably 3-55% by weight, even more preferably 4-45% by weight, most preferably 5-35% by weight of at least one elastomer E2, said proportion Based on the total weight of Mixture E.

[0068] According to one or more embodiments, at least one thermoplastic polymer E1 and at least one elastomer E2 are present in the mixture E and / or in the substrate S1 as co-continuous phases. The expression "co-continuous" is understood to mean that the distinction between dispersed and continuous polymer phases in the composition becomes difficult because each phase becomes spatially continuous. There may also be regions where the first phase appears to be...

Embodiment

[0309] Introduced below are working examples, which are intended to illustrate the invention described in detail. It will be appreciated that the invention is not limited to these described working examples. "Standard climate conditions" refer to a temperature of 23±1° C. and a relative air humidity of 50±5%.

[0310] Preparation of Example Substrate S1

[0311] A series of example substrates S1 were prepared. The materials shown in Table 1 were used in these examples.

[0312] Example sheets were produced using a laboratory scale extrusion-calendering apparatus consisting of a twin-screw extruder (Berstorff GmbH), a flat die and a set of water-cooled calender rolls. Extrusion temperatures and pressures are given in Table 2.

[0313] Material type / description supplier Hifax CA 10 Reactor TPO LyondellBasell Vistamaxx 6202 Propylene Ethylene Copolymer Exxon Mobile BB2030 bromobutyl rubber Lanxess Silox Actif E80 Zinc oxide ca...

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Abstract

The invention is directed to a method for adhesively bonding two substrates by means of a moisture-curable adhesive composition, characterized in that at least one of the substrates comprises at least 40 wt.-% of a mixture, said mixture consisting of: between 15 and 99 wt.-% of at least one thermoplastic polymer, between 1 and 85 wt.-% of at least one elastomer, and wherein the moisture-curable adhesive composition comprises: at least one polymer containing silane groups, between 10 and 40 wt.-% of at least one polymeric plasticizer, between 0.1 and 5 wt.-% of at least one amino-functional alkoxysilane, between 0 and 5 wt.-% of at least one C1 to C12-alkyl-functional alkoxysilane. The method yields adhesively bonded substrates without the requirements of using migrating plasticizers and pre-treating of the substrates.

Description

technical field [0001] The present invention relates to a method for adhesively bonding two substrates, the use of an adhesive composition for adhesively bonding two substrates, a kit-of-parts comprising said adhesive and two substrates ), and adhesively bonded substrates. [0002] Background of the invention [0003] Films and sheets made of thermoplastic materials play an important role in the building and construction industry today. Waterproofing membranes are used in the construction industry, for example, to seal foundations, underground surfaces such as tunnels, or roof structures against water penetration. Furthermore, such films are often used for window and facade thermal insulation. [0004] Prior art waterproofing membranes or window and facade insulation membranes are, for example, multilayer systems comprising a polymer-based barrier layer to provide watertightness. Typical polymers used in barrier layers include thermoplastics such as plasticized polyvinyl c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/12B32B7/12C09J5/00C09J11/06C09J11/08B32B9/00B32B9/04B32B11/04B32B13/12B32B15/08B32B17/06B32B21/08B32B27/08B32B27/12B32B27/28B32B27/30B32B27/34B32B27/36B32B27/38B32B27/40
CPCC09J5/00C08J5/124C09J2421/006C08J2400/108C08J2400/26B32B7/12C09J11/06C09J11/08B32B2270/00B32B2274/00B32B27/40B32B27/36B32B27/34B32B27/365B32B27/285B32B27/30B32B13/12B32B9/045B32B9/002B32B15/08B32B27/12B32B21/08B32B2262/101B32B2262/106B32B27/08B32B27/304B32B27/302B32B27/308B32B27/38B32B11/046B32B17/063C09J2301/41B32B17/06B32B25/042B32B37/12B32B2037/1261B32B2038/0056B32B2250/02B32B2250/248C08J2323/16C08J2375/08C09J2415/006C09J2423/006C09J2471/00C09J2475/00
Inventor M·奥特利R·罗斯卡姆普H·瓦利曼C·费厄F·肖非特
Owner SIKA TECH AG