Sika Technology Ag

Stefan Keiser

Herbert Ackermann

Frank Hoefflin

Matthias Gössi

Roman Rohrer

Jean-Claude Rudolf

Yannic Pironato

A sealing membrane including: a) a thermoplastic polyolefin membrane and b) a barrier film including b1) a barrier layer including at least one polymer selected from ethylene-vinyl alcohol copolymer, polyamide or polyester and b2) an outer layer, wherein the barrier film is laminated over the full surface area or over part of the surface area onto the polyolefin membrane, and so the outer layer is connected directly to the polyolefin membrane, and the outer layer and the polyolefin membrane are both ethylene-based or the outer layer and the polyolefin membrane are both propylene-based. The sealing membrane can be produced at low cost and has a stable interconnecting bond. It is suitable in particular for sealing in building construction or civil engineering work.

Barrier layers on sealing membranes

The present invention relates to a sealing device () which comprises a barrier layer () with a thermoplastic polymer P1, and an adhesive layer () with at least one ethylene-vinyl acetate copolymer (EVA) P2 and azo-dicarbonamide A, and which is suitable for sealing bases in the building sector. The invention further relates to a method for sealing said bases. The method according to the invention allows structures of civil engineering to be sealed rapidly and efficiently and ensures good adhesion of the sealing device on the base.

Sealing device with improved adhesion

The present invention relates to a sealing device () comprising a barrier layer () and an adhesive layer (), and which is suitable for sealing bases in the building sector. The adhesive layer comprises a polymer P2, the polymer P2 being polyethylene (PE), polypropylene (PP) or a copolymer of ethylene and propylene, and a polyolefin-based polymer P3, the polymer P3 having at least one functional group which is selected from the group consisting of carboxylic acids, OH-groups, anhydrides, acetates and glycidyl methacrylate, and azo-dicarbonamide A. The invention further relates to a method for sealing the said bases. The method according to the invention allows structures of civil engineering to be sealed rapidly and efficiently and ensures good adhesion of the sealing device on the base.

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Schwarzenberg, Switzerland

Stefan Keiser