Gas barrier resin composition, gas barrier coating material, and gas-barrier molding

A gas barrier coating agent, wherein

• the agent comprises 50 to 15% by mass of a compound (A) having two or more hydroxyl groups in a molecule thereof, 50 to 85% by mass of a compound (B) in which at least one carboxyl group is bound to each of three or more consecutive carbon atoms in a molecule thereof, and a solvent, and
• said compound (B) is any one of a compound in which no anhydrous structure is made among the carboxyl groups and a compound in which at least one anhydrous structure is made among the carboxyl groups.

A gas barrier molded material, wherein

• the material comprises a resin composition comprising 50 to 15% by mass of a compound (A) having two or more hydroxyl groups in a molecule thereof and 50 to 85% by mass of a compound (B) in which at least one carboxyl group is bound to each of three or more consecutive carbon atoms in a molecule thereof, and said compound (B) is any one of a compound in which no anhydrous structure is made among the carboxyl groups and a compound in which at least one anhydrous structure is made among the carboxyl groups, and said compound (A) is bound to said compound (B) by an ester linkage.

A gas barrier molded material, wherein

• a coating layer is formed by applying, on at least a single side of a substrate, a coating agent comprising 50 to 15% by mass of a compound (A) having two or more hydroxyl groups in a molecule thereof, 50 to 85% by mass of a compound (B) in which at least one carboxyl group is bound to each of three or more consecutive carbon atoms in a molecule thereof, and a solvent, and said compound (B) is any one of a compound in which no anhydrous structure is made among the carboxyl groups and a compound in which at least one anihydrous structure is made among the carboxyl groups.

A gas barrier film, wherein

• a coating layer is formed by applying, on at least a single side of a substrate film, a coating agent comprising 50 to 15% by mass of a compound (A) having two or more hydroxyl groups in a molecule thereof, 50 to 85 % by mass of a compound (B) in which at least one carboxyl group is bound to each of three or more consecutive carbon atoms in a molecule thereof, and a solvent, and said compound (B) is any one of a compound in which no anhydrous structure is made among the carboxyl groups and a compound in which at least one anhydrous structure is made among the carboxyl groups.

A method for producing a gas barrier molded material, wherein the method comprises heat processing a resin composition comprising 50 to 15% by mass of a compound (A) having two or more hydroxyl groups in a molecule thereof and 50 to 85% by mass of a compound (B) in which at least one carboxyl group is bound to each of three or more consecutive carbon atoms in a molecule thereof, and said compound (B) is any one of a compound in which no anhydrous structure is made among the carboxyl groups and a compound in which at least one anhydrous structure is made among the carboxyl groups, forming an ester linkage between said compound (A) and said compound (B), and hardening it.

A method for producing a gas barrier molded material, wherein the method comprises applying, on at least a single side of a substrate, a coating agent comprising 50 to 15% by mass of a compound (A) having two or more hydroxyl groups in a molecule thereof, 50 to 85% by mass of a compound (B) in which at least one carboxyl group is bound to each of three or more consecutive carbon atoms in a molecule thereof, and a solvent, wherein said compound (B) is any one of a compound in which no anhydrous structure is made among the carboxyl groups and a compound in which at least one anhydrous structure is made among the carboxyl groups, and drying said coating agent by heating to form a coating layer.