# US 2013/0157048 A1 · Sealing membrane with improved adhesion

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- Number: US 2013/0157048 A1
- Document ID: US20130157048A1
- Status: Published application
- Kind: A1
- Application number: 13/819,906
- Filed: 2011-09-12
- Published: 2013-06-20
- Earliest claimed: 2010-09-13
- Assignees: Sika Technology AG
- Inventors: Jean-Claude Rudolf
- Web page: https://patentgrep.com/patent/US20130157048A1

## CPC

- B32B 27/08: of synthetic resin
- C09D 163/00: Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
- E04D 5/06: by making use of plastics
- E04D 5/10: by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen
- E04D 5/148: {fastening by gluing}
- Y10T 428/269: including synthetic resin or polymer layer or component
- Y10T 428/2826: Synthetic resin or polymer
- Y10T 428/31515: As intermediate layer
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- E04D: ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS (coverings of outer walls by plaster or other porous material E04F13/00)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The invention relates to a sealing membrane comprising a thermoplastic barrier layer and a tack-free solid epoxy resin layer which is suitable for sealing substrates in the construction industry. The invention further relates to a method for sealing said substrates. Said method allows rapid and efficient sealing of structures in civil engineering and good adhesion of the sealing membrane on the substrate.

## Claims

### Claim 1

A sealing membrane comprising
a thermoplastic barrier layer, having thermoplastic polyolefins or polyvinyl chloride (PVC), and a tack-free solid epoxy resin layer.

### Claim 2 (depends on 1)

The sealing membrane according to claim 1, wherein the thermoplastic barrier layer contains materials selected from the group consisting of high-density polyethylene (HDPE), middle-density polyethylene (MDPE), low-density polyethylene (LDPE), polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinylchloride (PVC), polyamides (PA), ethylene vinyl acetate (EVA), chlorosulfonated polyethylene, thermoplastic polyolefins (TPO), ethylene propylene diene rubber (EPDM) and polyisobutylene (PIB) and their mixtures.

### Claim 3 (depends on 1)

The sealing membrane according to claim 1, wherein the solid epoxy resin of the tack-free solid epoxy resin layer is storage-stable at room temperature.

### Claim 4 (depends on 1)

The sealing membrane according to claim 1, wherein the tack-free solid epoxy resin layer has an amount of 1-20 wt %, especially 2-12 wt %, preferably 4-9 wt % of solid epoxy resin relative to the total weight of the solid epoxy resin layer.

### Claim 5 (depends on 1)

The sealing membrane according to claim 1, wherein the tack-free solid epoxy resin layer contains a chemical or physical expanding agent.

### Claim 6 (depends on 1)

The sealing membrane according to claim 1, wherein the tack-free solid epoxy resin layer also contains a thermoplastic polymer that is solid at room temperature.

### Claim 7 (depends on 6)

The sealing membrane according to claim 6, wherein the thermoplastic polymer, that is solid at room temperature, has a softening point in the range of 60° C. to 150° C., especially of 80° C. to 150° C.

### Claim 8 (depends on 6)

The sealing membrane according to claim 6, wherein the thermoplastic polymer, that is solid at room temperature, is an ethylene/vinylactate copolymer.

### Claim 9 (depends on 6)

The sealing membrane according to claim 6, wherein the weight ratio of solid epoxy resin to thermoplastic polymer solid at room temperature is between 1:2 and 1:10, preferably between 1:4 and 1:8.

### Claim 10 (depends on 1)

The sealing membrane according to claim 1, wherein the thermoplastic barrier layer and the tack-free solid epoxy resin layer are directly connected to one another.

### Claim 11 (depends on 1)

The sealing membrane according to claim 1, wherein the tack-free solid epoxy resin layer has a thickness of 0.1-5 mm.

### Claim 12 (depends on 1)

A method for sealing a substrate comprising the steps:
(i) applying a sealing membrane according to claim 1 on a substrate, wherein the side of the tack-free solid epoxy resin layer faces the substrate; and
(ii) heating the tack-free solid epoxy resin layer of the sealing membrane, preferably to a temperature of 80-600° C.

### Claim 13 (depends on 1)

A method for manufacturing a sealing membrane according to claim 1, wherein the thermoplastic barrier layer 2 and/or the tack-free solid epoxy resin layer are manufactured by calendering and/or extrusion and/or co-extrusion and/or lamination.

### Claim 14 (depends on 1)

A form body whose surface comprises a sealing membrane according to one of claim 1, wherein the sealing membrane is arranged on the form body with its side facing away from the thermoplastic barrier layer.