Heat ray-shielding particle-containing composition and method of producing the same, heat ray-shielding film, and heat ray-shielding laminated transparent base material

A heat ray-shielding particle-containing composition, containing a composite tungsten oxide particle expressed by a general formula MyWOz (wherein M is one or more kinds of element selected from Cs, Rb, K, Tl, In, Ba, Li, Ca, Sr, Fe, Sn, Al, and Cu, satisfying 0.1<=y<=0.5, 2.2<=z<=3.0), and having a hexagonal crystal structure, and two kinds or more dispersants, comprising:

• at least one kind of an amino group polymer dispersant as the dispersant, having an amino group as a functional group, and having a thermal decomposition temperature of 200° C. or more;
• and
• at least one kind of the group consisting of a hydroxyl polymer dispersant having a hydroxyl group (—OH group) as a functional group and a carboxyl group polymer dispersant having a carboxyl group (—COOH) as a functional group as the dispersant, having an acrylic backbone and a thermal decomposition temperature of 200° C. or more, wherein
• a content of an organic solvent having a boiling point of 120° C. or less is 5 mass % or less,
• 50 wt. part or more and 9900 wt. part or less of the amino group polymer dispersant is contained, based on 100 wt. part of the composite tungsten oxide particles,
• 5 wt. part or more and 1000 wt. part or less of the hydroxyl polymer dispersant and the carboxyl group polymer dispersant is contained, based on 100 wt. part of the composite tungsten oxide particles, and
• a dispersant having an epoxy group as a functional group is not contained in the heat ray-shielding particle-containing composition.