摘要 |
PROBLEM TO BE SOLVED: To provide an undercoat agent which is excellent in adhesiveness with an inorganic thin film layer and capable of maintaining smoothness of the inorganic thin film surface, and used for producing a plastic with the inorganic thin film.SOLUTION: The undercoat agent for the plastic with the inorganic thin film contains a polyfunctional aziridine derivative (A), as a film forming component, having at least three specified aziridinyl groups in the molecule, a ring-opening catalyst (B) for an aziridinyl group, and a solvent (C), and does not contain a polymer (D), as a film forming component, having a functional group that reacts with an aziridinyl group expressed by formula (1) in the molecule. In formula (1), Rand Reach represent a hydrogen atom or a 1-6C alkyl group. |