| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition which can be cured in a short time and gives coating films not containing foams and having excellent flexibility, extendability and light-resistant stability by mixing a specific isocyanate- terminated urethane prepolymer with a latent curing agent and an acid. SOLUTION: This one pack type moisture-curable polyurethane composition comprises (A) an isocyanate-terminated urethane prepolymer which has an NCO group content of 0.5-2.8 wt.% and is obtained by reacting a polycyclic aliphatic diisocyanate especially a compound of the formula [(m), (n) are each 1-5] with an active hydrogen compound (for example, a compound having two or more hydroxyl groups at the molecular terminals, such as a polyether polyol or polytetrametylene ether glycol), (B) a latent curing agent (for example, an enamine, a polyaldimine, a polyketimine, aβ-lactam, an oxazolidine), and (C) an acid (for example, a carboxylic acid, a sulfonic acid, an acidic phosphate ester, a phosphonic acid).
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