| 摘要 |
PROBLEM TO BE SOLVED: To provide: a two-liquid curable polyurethane-based sealant composition excellent in adhesion with coating applied to a surface of a cured object, and with which secular discoloration and contamination of a coated film of a coating material applied to the surface of the cured object can be suppressed; and a sealant using the same.SOLUTION: A two-liquid curable polyurethane-based sealant composition includes: a urethane prepolymer as a main agent; and a curing agent including a compound containing at least one active hydrogen group in one molecule, and a reactive plasticizer that is a terminal hydroxyl-blocked compound obtained by making a polyfunctional alcohol serve as an initiator, addition-polymerizing propylene oxide to obtain a polypropylene ether polyol, and blocking all terminal hydroxyls except stoichiometrically one hydroxyl in one molecule of polypropylene ether polyol to obtain the terminal hydroxyl-blocked compound. |
