TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The composition contains planar inorganic compound (D). Preferred Parameters: Planar inorganic compound (D) has an average particle diameter of greater than or equal to 0.1 mu m.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: Ortho aromatic dicarboxylic acid (anhydride) is ortho phthalic acid (anhydride), naphthalene-2,3-dicarboxylic acid (anhydride), naphthalene-1,2-dicarboxylic acid (anhydride), anthraquinone-2,3-dicarboxylic acid (anhydride) and/or 2,3-anthracene dicarboxylic acid (anhydride). Resin (A) is polyester polyol (A1) having greater than or equal to 1 carboxy group and greater than or equal to 2 hydroxyl group obtained by reacting carboxylic anhydride or polycarboxylic acid with polyester polyol having greater than or equal to 3 hydroxyl groups, polyester polyol (A2) having a polymerizable carbon-carbon double bond, polyester polyol (A3) of formula R2'-O-CH2-CH(O-R1')-CH2-O-R3' (3), polyester polyol (A4) obtained by polycondensing the polyhydric alcohol component which contains ethylene glycol, propylene glycol, butylene glycol, neopentylglycol, and/or cyclohexane dimethanol, or polyester polyol (A5) which has an isocyanuric ring of formula (5). Monomer components with polymerizable carbon-carbon double bond in the polyester polyol (A2) are maleic acid, maleic anhydride, and/or fumaric acid, which is 5-60 mass parts with respect to 100 mass parts of all the monomer components. Polyester polyol (A3) contains greater than or equal to 5 mass% glycerol residue. Isocyanate compound (B) contains polyisocyanate which has an aromatic ring, which is a reaction product of metaxylene diisocyanate or metaxylene diisocyanate, and alcohol with greater than or equal to 2 hydroxyl group. Planar compound (D) is contained in non-ionic and non-water swellable interlayer. When the gross mass of resin (A), isocyanate compound (B), phosphoric acid-modified compound (C), and planar inorganic compound (D) is 100 mass parts, planar inorganic compound (D) is 5-50 mass parts. Resin (A) is dissolved in ketone solvent, and/or ester solvent.R1'-R3'=H or formula -(C(=O)-X-C(=O)-O-Y-O)n-H (4) provided that greater than or equal to 1 is formula (4);m=1-5;X=optionally substituted arylene group such as 1,2-phenylene group, 1,2-naphthylene group, 2,3-naphthylene group, 2,3-anthraquinonediyl group, or 2,3-anthracenediyl group;Y=2-6C alkylene group;R1''-R3''=-(CH2)n1-OH, or formula -(CH2)n2-O-(C(=O)-X-C(=O)-O-Y-O)n3-H (6);n1, n2=2-4; andn3=1-5.Preferred Parameters: The hydroxyl value of polyester polyol (A1) is 20-250, and acid value is 20-200. When the application quantity of cured coating film obtained from resin (A) and isocyanate compound (B) is 5 g/m2, oxygen permeability in 90% 23 degrees C humidity of the cured coating film is less than or equal to 100 cc/m2.day.atm. When the application quantity of cured coating film obtained from resin (A), isocyanate compound (B), and planar inorganic compound (D) is 5 g/m2, oxygen permeability in 90% 23 degrees C humidity of the cured coating film is less than or equal to 100 cc/m2.day.atm.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: Resin (A) contains an aromatic ring from polyester, polyester polyurethane, polyether, and/or polyether polyurethane, preferably polyester or polyester polyurethane consisting of 70-100 mass% ortho aromatic dicarboxylic acid (anhydride) with respect to total polyvalent carboxylic acid polyester structure monomer component.