| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for forming a transparent coating film having a high refractive index by a primer on a substrate surface. SOLUTION: The method for forming a transparent coating film on a substrate material comprises coating a primer comprising (A) a polyol, (B) at least one of a blocked isocyanate and a blocked thioisocyante, (C) an inorganic oxide sol, and (D) a compound having a C=O group, a C-O-C group, and an OH group bonded to a tertiary carbon atom in the molecule on the substrate. |
