| 摘要 |
PROBLEM TO BE SOLVED: To obtain a composition having excellent film properties such as water resistance, mechanical strength, flexibility and the like by blending an acetoacetate group-containing polyvinyl alcohol-based resin and a polyvinyl alcohol-based resin having a specific value or more of an average polymerization degree. SOLUTION: A resin composition contains (A) an acetoacetate group- containing polyvinyl alcohol-based resin and (B) a polyvinyl alcohol-based resin having an average polymerization degree of 2,600 or more, wherein the components A and B are blended in a weight ratio of the component A/the component B of 2/98 to 98/2. The component A is prepared by adsorbing an organic acid to polyvinyl alcohol and spraying a liquid or gaseous diketene in an inert gas atmosphere to react the same and has an acetoacetate group content of 0.1-15 mol% and preferably has a saponification degree of 80-98 mol%. The resin composition is dissolved to make an aqueous solution with a solid content of 0.5-70 wt.% and the solution is coated on a substrate in a coating weight of 0.5-40 g/m2. An overcoat layer on the surface of an ink- receiving layer is formed such that it has a thickness of 0.1-1,000 μm after drying. |
