Multilayer adhesive tape
AssigneeTesa SE
InventorsAlexander Prenzel, Ji Li, Julia Befuss
Life of this patent
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Abstract
Disclosed are powerful adhesive tapes, which rapidly coat rough and/or curved surfaces with different surface energies and thereby build up high adhesion. The adhesive joints formed in this way furthermore have good shear strength, even at elevated temperatures. Finally, enduring mechanical loading on the adhesive joints does not lead to the adhesive tape peeling from the surface. This is achieved with an adhesive tape comprising at least one foamed layer and at least one adhesive compound layer, wherein the adhesive compound layer contains at least one poly(meth)acrylate, and the poly(meth)acrylate is cross-linked with at least one covalent and at least one coordinative cross-linker.
Claims7
An adhesive tape comprising:
- a foamed layer having a first side and a second side;
- a first pressure-sensitive adhesive layer arranged on the first side of the foamed layer;
- a second pressure-sensitive adhesive layer arranged on the second side of the foamed layer;
- wherein the foamed layer has a thickness of 300-2500 μm;
- wherein each of the first and second pressure-sensitive adhesive layers has a thickness of 40-100 μm;
- wherein the first and second pressure-sensitive adhesive layers are compositionally identical and comprise at least one poly(meth)acrylate;
- wherein said at least one poly(meth)acrylate is crosslinked with both a covalent crosslinker and a coordinative crosslinker;
- wherein a molar ratio of functional groups of the covalent crosslinker to binding sites of the coordinative crosslinker is 3:1 to 9:1;
- wherein said covalent crosslinker is a polyfunctional glycidylamine compound selected from the group consisting of N,N,N′, N′-tetrakis(2,3-epoxypropyl)cyclohexane-1,3-dimethylamine and N,N,N′,N′-tetrakis(2,3-epoxypropyl)-m-xylene-a,a′-diamine;
- wherein said coordinative crosslinker is selected from the group consisting of polyvalent metal chelate compounds comprising a polyvalent metal ion selected from the group consisting of Al(III), Zr(IV) and Ti(IV).
An adhesive tape comprising:
- a foamed layer having a first side and a second side;
- a first pressure-sensitive adhesive layer arranged on the first side of the foamed layer;
- a second pressure-sensitive adhesive layer arranged on the second side of the foamed layer;
- wherein the foamed layer has a thickness of 300-2500 μm;
- wherein each of the first and second pressure-sensitive adhesive layers has a thickness of 40-100 μm;
- wherein the first and second pressure-sensitive adhesive layers are compositionally identical and comprise at least one poly(meth)acrylate;
- wherein said at least one poly(meth)acrylate is crosslinked with both a covalent crosslinker and a coordinative crosslinker;
- wherein a molar ratio of functional groups of the covalent crosslinker to binding sites of the coordinative crosslinker is 3:1 to 9:1;
- wherein said covalent crosslinker is a polyfunctional glycidylamine compound selected from the group consisting of N,N,N′,N′-tetrakis(2,3-epoxypropyl)cyclohexane-1,3-dimethylamine and N,N,N′,N′-tetrakis(2,3-epoxypropyl)-m-xylene-a,a′-diamine;
- and
- wherein said coordinative crosslinker is aluminum triacetylacetonate.
Dependencies are inferred from the claim text.