Coating solution, and gas barrier film, gas barrier laminate and gas barrier multilayer film, using the coating solution, and their manufacturing methods

摘要

A coating solution comprising: a first solvent; 0.1 to 30 parts by weight of a polycarboxylic acid-based polymer relative to 100 parts by weight of the solvent; 0.01 to 0.35 chemical equivalent of an alkali metal compound relative to an amount of carboxyl group in the polycarboxylic acid-based polymer; and 0.05 to 0.75 chemical equivalent of a multivalent metal compound relative to the amount of the carboxyl group, wherein a number average molecular weight of the polycarboxylic acid-based polymer is in a range of 40,000 to 10,000,000.