The disclosure provides pressure-sensitive adhesives and adhesive sealants prepared from alkoxysilane modified, crosslinked isobutylene copolymers, and tape articles prepared therefrom. The adhesive is particularly useful in bonding optical displays.

A film-like adhesive containing a thermosetting resin component and a filler, in which the film-like adhesive has a single layer structure including a first surface and a second surface, and has a region A in the vicinity of the first surface, the region in which a content of the filler decreases in a direction from the second surface toward the first surface, and a region B in which the content of the filler does not substantially change in a direction from the region A toward the second surface, in which when the film-like adhesive is cured, the film-like adhesive satisfies Formula (1) below:

[00001]$\begin{array}{cc}a\left(b/c\right)>50& \left(1\right)\end{array}$ in which a thickness of a region A after thermal curing is a (nm), an elastic modulus of a region B is b (Pa), and an elastic modulus at a cleaved surface of mica is c (Pa).

A film-like adhesive containing a thermosetting resin component and a filler, in which the film-like adhesive has a single layer structure including a first surface and a second surface, and has a region A in the vicinity of the first surface, the region in which a content of the filler decreases in a direction from the second surface toward the first surface, and a region B in which the content of the filler does not substantially change in a direction from the region A toward the second surface, in which when the film-like adhesive is cured, the film-like adhesive satisfies Formula (1) below:

[00001]$\begin{array}{cc}a\left(b/c\right)>50& \left(1\right)\end{array}$ in which a thickness of a region A after thermal curing is a (nm), an elastic modulus of a region B is b (Pa), and an elastic modulus at a cleaved surface of mica is c (Pa).