Aqueous coating agent and gas barrier film

A gas barrier film, comprising:

• a base film comprising a plastic film;
• and
• a film layer formed on the base film and comprising an aqueous polyurethane resin, a water-soluble polymer, and an inorganic layered mineral,
• wherein the aqueous polyurethane resin comprises a polyurethane resin having an acid group and a polyamine compound, and the film layer includes 50-80 mass % of the aqueous polyurethane resin, 5-20 mass % of the water-soluble polymer, and 10-30 mass % of the inorganic layered mineral.

A gas barrier laminate, comprising:

• a base film comprising a plastic material;
• a gas barrier layer formed on the base film;
• a protective layer formed on the gas barrier layer;
• an adhesive layer formed on the protective layer;
• and
• a heat-sealable resin layer formed on the adhesive layer,
• wherein the gas barrier layer is a film comprising an aqueous polyurethane resin, a water-soluble polymer, and an inorganic layered mineral,
• the aqueous polyurethane resin comprises a polyurethane resin having an acid group and a polyamine compound,
• the film formed by the gas barrier layer includes 50-80 mass % of the aqueous polyurethane resin, 5-20 mass % of the water-soluble polymer, and 10-30 mass % of the inorganic layered mineral.