| abstract |
Provided are a solvent-free-adhesive polyisocyanate composition, containing, as essential components, a polyisocyanate (A) and an aromatic vinyl-maleic anhydride copolymer (B), which is a copolymer of aromatic vinyl and maleic anhydride and in which a molar ratio [aromatic vinyl/maleic anhydride] of raw material monomers of the copolymer is 1.5/1 to 5/1, and a method for producing the polyisocyanate composition; a solvent-free adhesive containing, as essential components, the solvent-free-adhesive polyisocyanate composition and a polyol (Y); and a multilayer film obtained by laminating a first base material film, a second base material film, and an adhesive layer between the base material films, in which the adhesive layer is formed of the solvent-free adhesive. |