Adhesive layer, near-infrared shielding film, laminated structure, stacked body and adhesive agent composition

An adhesive layer comprising:

• composite tungsten oxide particles and/or tungsten oxide particles;
• a dispersant;
• a metal coupling agent including an amino group that is selected from a group consisting of 3-aminopropyltrimethoxysilane, 3-(2-aminoethylamino) propyltrimethoxysilane, 3-(2-aminoethylamino) propyldimethoxymethylsilane, trimethoxy [3-(phenylamino) propyl]silane, and 3-(2-aminoethylamino) propyltrimethoxysilane;
• an adhesive agent including an acrylic-based polymer;
• an organic solvent, and
• a cross-linking agent that is one or more types selected from a polyfunctional melamine compound, a polyfunctional isocyanate compound, a polyfunctional epoxy compound,
• wherein a content of the metal coupling agent including the amino group in the adhesive layer is greater than or equal to 0.01 wt % and less than or equal to 0.60 wt %,
• wherein greater than or equal to 1 part by weight and less than or equal to 100 parts by weight of the metal coupling agent including an amino group is included with respect to 100 parts by weight of the composite tungsten oxide particles and/or the tungsten oxide particles,
• wherein the acrylic-based polymer is a polymer constituted by (meth)acrylic acid alkyl ester, carbon number of whose alkyl group is greater than or equal to 1 and less than or equal to 12, and/or (meth)acrylic acid alcoxy alkyl ester as a main monomer component,
• wherein a functional group included in the metal coupling agent including the amino group adsorbs on the composite tungsten oxide particle and/or tungsten oxide particle, and prevents aggregation with another composite tungsten oxide particle and/or tungsten oxide particle due to steric hindrance, and
• wherein the composite tungsten oxide particle and/or tungsten oxide particle is mixed in the organic solvent together with the dispersant, the metal coupling agent, the adhesive agent, and the cross-linking agent, as the adhesive layer.