| abstract |
(57) [Problem] To provide a primer composition having sufficient adhesiveness to a fluororesin-coated steel sheet and an acrylic electrodeposition-coated steel sheet when a sealing material that forms and cures a siloxane bond is used. . SOLUTION: embedded image R in Formula 1 is a silylalkyl group represented by Formula 2. In the formula 2, R1 is an alkylene group, R2 is a substituted or unsubstituted monovalent hydrocarbon group, n is a silane coupling agent represented by an integer of 2 to 3, and a primer composition comprising a polyisocyanate compound. Providing things. |