Patent ID: 8114521

Claim:
A gas barrier laminate comprising: a plastic substrate; a gas barrier layer formed from a gas barrier layer-forming coating material (C) comprising a polyalcohol-based polymer (A) and a polycarboxylic acid-based polymer (B); an overcoat layer formed from an overcoat layer-forming coating material (F) comprising at least one of a monovalent metal compound (D) and a bivalent or higher metal compound (E); and a top coat layer formed from a top coat layer-forming coating material (G); wherein the top coat layer-forming coating material (G) is an aqueous solution or an aqueous dispersion and wherein the top coat layer-forming coating material (G) comprises a urethane resin obtained by a process comprising reacting a polyfunctional isocyanate and a hydroxyl group-containing compound, and wherein the gas barrier layer is laminated to the plastic substrate, either directly or with an anchor coat layer disposed therebetween, the overcoat layer is laminated on top of the gas barrier layer, and the top coat layer is formed on top of the overcoat layer.