| abstract |
(57) [Problem] To provide a composition capable of forming a transparent film having both moisture absorbability and dropping property and good water resistance, and a composite material provided with the composition. SOLUTION: Citric acid as a carboxylic acid-containing compound, nitric acid as a catalyst, a mixed solvent of distilled water and ethyl alcohol as a solvent, and polyvinyl alcohol as a vinyl alcohol-containing water-absorbing organic polymer, By mixing appropriate amounts of formaldehyde, which is an aldehyde compound, with each other, and heating and reacting, a coating film having both hygroscopicity and dripping properties and good water resistance can be obtained. |