Multilayer pressure-sensitive adhesive construction

The present invention relates to pressure-sensitive adhesive constructions, and more particularly, to multilayer pressure-sensitive adhesive constructions which exhibit both good adhesion and good convertibility. The present invention is directed toward multilayer pressure-sensitive adhesive constru...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Ercillo, Jesse C, Mann, Roger H, Josephy, Karl, Sartor, Luigi, Sasaki, Yukihiko, De Koning, Henk, Chang, Eng-Pi
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The present invention relates to pressure-sensitive adhesive constructions, and more particularly, to multilayer pressure-sensitive adhesive constructions which exhibit both good adhesion and good convertibility. The present invention is directed toward multilayer pressure-sensitive adhesive constructions with improved convertibility and aging. In one embodiment, the multilayer constructions have one layer formed of a first adhesive composition having a first glass transition temperature, and also having a tangent delta greater than about 0.5 at 10radians per second at 20° C., and a storage modulus greater than about 3×10dynes/cmat 10radians per second at 20° C. At least a second adhesive layer is provided in the construction, the second adhesive layer comprising a second adhesive composition with a second glass transition temperature.