Pressure-sensitive adhesive sheet for metal surface protection

摘要

The present invention provides a metal surface protective pressure-sensitive adhesive sheet comprising a substrate and an acrylic pressure-sensitive adhesive layer that comprises an acrylic polymer and a thermally expandable microsphere provided on at least one face of the substrate. The acrylic polymer is characterized by having a carboxylic acid equivalent weight of 0.0010 eq./g or less and an amine equivalent weight of 0.0050 eq./g to 0.0600 eq./g.