Pressure-sensitive adhesive composition having an improved release behavior
View Patent ↗Adhesive tape comprising at least one layer of an acrylate-based pressure-sensitive adhesive and a liner having a catalyzed addition crosslinking silicone coating, the silicone coating being in direct contact with the pressure-sensitive adhesive and the pressure-sensitive adhesive comprising additives that are effective as catalyst poisons.
1. An adhesive tape comprising at least one layer of an acrylate-based pressure-sensitive adhesive, and a liner furnished with a catalyzed, hydrosilylation addition-crosslinking silicone coating, the silicone coating being in direct contact with the layer of acrylate-based pressure-sensitive adhesive, wherein the acrylate-based pressure-sensitive adhesive contains additives selected from the group consisting of didodecyl 3,3′-thiopropionate, 2-ethylhexyl thioglyconate, and pentaerythritol tetra(3-mercaptopropionate), which act as catalyst poisons for the hydrosilylation addition crosslinking catalyst of the silicone.
2. The adhesive tape as claimed in claim 1 , wherein the hydrosilylation addition-crosslinking catalyst of the silicone is platinum, a platinum complex or a platinum compound.
3. The adhesive tape as claimed in claim 1 , wherein the additives which act as catalyst poisons are present in the acrylate-based pressure-sensitive adhesive in an amount of up to 10% by weight.
4. A method for regulating the removal forces with which a liner furnished with a catalyzed hydrosilylation addition crosslinked silicone coating can be removed from an acrylate-based pressure-sensitive adhesive, which comprises including in said acrylate-based pressure-sensitive adhesive compounds selected from the group consisting of didodecyl 3,3′-thiopropionate, 2-ethylhexyl thioglyconate, and pentaerythritol tetra(3-mercaptopropionate) which act as catalyst poisons for the hydrosilylation addition-crosslinking catalyst in said hydrosilylation catalyzed addition crosslinked silicone coating.
5. A method for regulating the removal forces with which a catalyzed hydrosilylation addition crosslinked silicone coated liner can be removed from an acrylate-based pressure-sensitive adhesive located on said liner, which comprises including in said acrylate-based pressure-sensitive adhesive compounds selected from the group consisting of didodecyl 3,3′-thiopropionate, 2-ethylhexyl thioglyconate, and pentaerythritol tetra(3-mercaptopropionate) which act as catalyst poisons for platinum-containing hydrosilylation catalysts.
6. The method of claim 4 , wherein the catalyst poisons are present in the acrylate-based pressure-sensitive adhesive in an amount of up to 10% by weight.
7. The adhesive tape of claim 3 , wherein the additives which act as catalyst poisons are present in the acrylate-based pressure-sensitive adhesive in an amount of from 0.0001% to 5% by weight.
8. The adhesive tape of claim 7 , wherein said additives which act as catalyst poisons are present in the acrylate-based pressure-sensitive adhesive in an amount of 0.001% to 1% by weight.
9. The method of claim 5 , wherein the compounds which act as catalyst poisons are present in the acrylate-based pressure-sensitive adhesive in an amount of up to 10% by weight.