Abstract: The polyisocyanate composition maintains an adhesive function comparable to that of a currently available urethane-reactive two-liquid curable adhesive and reduces the amount of isocyanate monomers. The polyisocyanate composition contains a compound (A1) having one or more isocyanate groups with a number-average molecular weight of more than 280 and an isocyanate monomer (A2) having a number-average molecular weight of 140 to 280, in which a blending amount of the isocyanate monomer (A2) is 0.001% by mass or more and 0.1% by mass or less with respect to the solid content of the polyisocyanate composition; a two-liquid curable adhesive containing the polyisocyanate composition and a composition (Y) which contains a compound having a group capable of reacting with an isocyanate group; and a laminate and a packaging material using the same.

Abstract: The present invention aims to provide an adhesive composition that can exhibit excellent adhesion to both smooth surfaces and rough surfaces. The present invention also aims to provide an adhesive tape including an adhesive layer containing the adhesive composition, as well as a method for fixing and a method for producing an electronic device component or an in-vehicle component using the adhesive tape. Provided is an adhesive composition containing an acrylic copolymer containing a structural unit derived from n-heptyl (meth)acrylate.