| 摘要 |
<p>A pressure-sensitive adhesive capable of forming a pressure-sensitive adhesive layer which is free from air bubble inclusion when applied to an adherend and which, when peeled off, leaves no pressure-sensitive adhesive residue. Also provided is a surface-protecting pressure-sensitive adhesive sheet employing the pressure-sensitive adhesive. The pressure-sensitive adhesive comprises: an acrylic ester resin having a weight-average molecular weight, in terms of polystyrene as determined by the GPC method, of 500,000 to 1,000,000; and a crosslinking agent. The pressure-sensitive adhesive is characterized in that the acrylic ester resin contains a (meth)acrylic ester component having a crosslinkable functional group in a specific amount based on the whole acrylic ester resin, and when the pressure-sensitive adhesive is immersed in ethyl acetate at 23°C for 24 hours, taken out of the ethyl acetate, and dried at 110°C for 1 hour, then it has a gel content (Y) expressed by a specific equation of 30-90 wt.%.</p> |
