Aqueous polyhydroxyurethane resin dispersion, method for producing said aqueous dispersion, gas-barrier resin film produced using said aqueous dispersion, aqueous polyhydroxyurethane resin dispersion composition containing clay mineral, gas-barrier coating agent comprising said composition, and gas-barrier resin film

A clay mineral-containing aqueous polyhydroxyurethane resin dispersion composition, the composition being an aqueous dispersion composition of a composite material comprising:

• as an (A) component an anionic polyhydroxyurethane resin having a carboxyl group and a hydroxy group;
• and
• as a (B) component a layered clay mineral, wherein
• a total content of the (A) component and the (B) component is 10 to 50% by mass;
• the (B) component is contained in a range of 1 to 100 parts by mass based on 100 parts by mass of the (A) component;
• and
• a chemical structure of the anionic polyhydroxyurethane resin being the (A) component and having a carboxyl group and a hydroxy group comprises a repeating unit represented by the following formula (1) as a basic structure and has a carboxyl group-containing chemical structure moiety represented by the following formula (6):
• wherein:
• —X— represents a direct bond, an aliphatic hydrocarbon group having 1 to 30 carbon atoms, an alicyclic hydrocarbon group having 4 to 40 carbon atoms, or an aromatic hydrocarbon group having 6 to 40 carbon atoms, and in structures of these groups, any one of an ether bond, an amino bond, a sulfonyl bond, and an ester bond, or as a substituent, any one of a hydroxy group, a halogen atom, and a polyalkylene glycol chain having a number of repeating units of 1 to 30 each comprising 2 to 6 carbon atoms is optionally contained;
• Y— represents an aliphatic hydrocarbon group having 1 to 15 carbon atoms, an alicyclic hydrocarbon group having 4 to 15 carbon atoms, or an aromatic hydrocarbon group having 6 to 15 carbon atoms, and in structures of these groups, an ether bond or a sulfonyl bond, or as a substituent, any one of a hydroxy group and a halogen atom is optionally contained;
• -Z1- and -Z2- each independently represent at least any one of structures selected from the group consisting of the following formula (2), formula (3), formula (4), and formula (5), and two types or more of the structures selected from these formulas (2) to (5) are optionally mixed within repeating units and between repeating units;
• and
• in any of cases where any one of formulas (2) to (5) is selected, a bond on a right side bonds with an oxygen atom, and a bond on a left side bonds with X, and in a case where X represents a direct bond, the bond on the left side bonds with a bond on a left side of the other Z,
• wherein R in formula(4) or formula (5) represents a hydrogen atom or a methyl group,
• wherein:
• -W- represents an aliphatic hydrocarbon group having 1 to 30 carbon atoms, an alicyclic hydrocarbon group having 4 to 40 carbon atoms, or an aromatic hydrocarbon group having 6 to 40 carbon atoms, and in structures of these groups, any one of an ether bond, an amino bond, a sulfonyl bond, and an ester bond, or as a substituent, any one of a hydroxy group, a halogen atom, and a polyalkylene glycol chain having a number of repeating units of 1 to 30 each comprising 2 to 6 carbon atoms is optionally contained;
• Y— represents a part to be bonded with a urethane structure having a bond represented by formula (1) and is selected from those represented as Y— in the formula (1);
• and
• -V- represents a hydrocarbon group having 1 to 10 carbon atoms or an aromatic hydrocarbon group having 6 to 10 carbon atoms, and in structures of these groups, an oxygen atom or a nitrogen atom is optionally contained.