Double-sided adhesive tape comprising a first outer, pressure-sensitive adhesive side, and a second outer side which can be thermally-activated

Patent metadata

Field	Value
Publication number	US-9493680-B2
Application number	US-201214115135-A
Country	US
Kind code	B2
Filing date	May 4, 2012
Priority date	May 6, 2011
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

A double-sided adhesive tape useful for adhesively bonding articles composed of thermoplastic polymer, of EPDM, or of another rubberlike material is provided, having a first outer, pressure-sensitive adhesive side and a second outer, thermally-activatable side, and that comprises an at least dual-layered product construction consisting of layers A and B, layer A being a pressure-sensitive adhesive layer that is chemically cross-linked by thermal initiation, or being a pressure-sensitively adhesive carrier layer chemically cross-linked by thermal initiation, layer B being a thermoplastic synthetic material-based layer, layers A and B being in direct contact with one another, and the surface of layer A, which is in direct contact with layer B, having been corona or plasma pre-treated. The corona or plasma pre-treatment takes place in an atmosphere of nitrogen, carbon dioxide or a noble gas, or a mixture of at least two of these gases.

First claim

The invention claimed is:

1. A double-sided adhesive tape having a first outer pressure-sensitive adhesive side and a second outer heat-activatable side, comprising an at least two-layer product system composed of a layer A and a layer B,
layer A being a layer of pressure-sensitive adhesive crosslinked chemically by thermal initiation, or a pressure-sensitively adhesive carrier layer crosslinked chemically by thermal initiation, wherein layer A is based on polyacrylate and is foamed,
layer B being a layer based on a thermoplastic polymer selected from the group consisting of polyolefins and polyolefin mixtures,
layer A and layer B being in direct contact with one another, and
the surface of layer A that is in direct contact with layer B having been corona- or plasma-pretreated in the chemically crosslinked state,
wherein
the corona or plasma pretreatment has taken place in an atmosphere consisting of a gas selected from the group consisting of nitrogen, carbon dioxide, noble gases, and mixtures of at least two of these gases.

2. The double-sided adhesive tape as claimed in claim 1 , wherein
no additional actinic or ionizing radiation is used for crosslinking layer A.

3. The double-sided adhesive tape as claimed in claim 1 , wherein
layer A is a layer produced in a hotmelt process.

4. The double-sided adhesive tape as claimed in claim 1 , wherein
the surface of the layer A that is not in direct contact with layer B is in direct contact with a further layer or with a further layer sequence, the outer layer of the further layer or of the further layer sequence being a layer of pressure-sensitive adhesive.

5. The double-sided adhesive tape as claimed in claim 1 , wherein
layer B is a layer based on a polypropylene copolymer or a mixture of a polypropylene copolymer and another polyolefin.

6. The double-sided adhesive tape as claimed in claim 1 , wherein
layer B has a melting temperature as determined by differential scanning calorimetry of between 140° C. inclusive and 180° C. inclusive.

7. The double-sided adhesive tape as claimed in claim 1 , wherein
the surface of the layer B that is contact with layer A has been air corona-pretreated.

8. A combination comprising (A) the double-sided adhesive tape as claimed in claim 1 and (B) an article composed of a thermoplastic polymer, or of ethylene propylene diene monomer or ethylene propylene diene copolymer.

9. The double-sided adhesive tape as claimed in claim 1 , wherein
the surface of layer B that is in direct contact with layer A has not been air corona pretreated.

10. A method for producing the double-sided adhesive tape as claimed in claim 1 , comprising
bringing layer A and layer B into direct contact with one another in a backing or laminating operation which takes place immediately following a corona or plasma pretreatment.

11. A method for adhesively bonding profiles composed of EPDM or of rubber, said method comprising bonding the double-sided adhesive tape as claimed in claim 1 to said EPDM or rubber.

Assignees

• Schümann Uwe
• Weiland Kirstin
• Neuhaus-Steinmetz Hermann
• Perlbach Dennis
• Koops Arne
• Schubert Thomas
• Kirpicenok Olga
• Reich Sarah
• Tesa Se

Inventors

• Schümann Uwe
• Weiland Kirstin
• Neuhaus-Steinmetz Hermann
• Perlbach Dennis
• Koops Arne
• Schubert Thomas
• Kirpicenok Olga
• Reich Sarah

Classifications

• C08G2170/40

  Compositions for pressure-sensitive adhesives · CPC title

• C09J2433/00

  Presence of (meth)acrylic polymer · CPC title

• C08J5/128

  Adhesives without diluent · CPC title

• Y10T428/2826

  Synthetic resin or polymer · CPC title

• C09J5/02 Primary

  involving pretreatment of the surfaces to be joined · CPC title