| 摘要 |
PROBLEM TO BE SOLVED: To provide a one-part moisture-curable polyurethane composition for being excellent in a rapid cure, yellowing resistance, flexibility and extensibility by compounding an isocyanate-terminated urethane prepolymer of specific NCO contents which is obtained by reacting a polycyclic aliphatic diisocyanate with an active hydrogen compound, and a potential curing agent. SOLUTION: A isocyanate-terminated urethane prepolymer of NCO contents of 0.5-2.8 wt.% is used. As a polycyclic aliphatic diisocyanate, the diisocyanate represented by the formula ((m) and (n) are each an integer of 1-5) is particularly referable. As a potential curing agent, the agent which generates an amine when the agent is hydrolyzed is desirable, and polyaldimine represented by formula: Y-(-N=CH-X)n (wherein X is 6-15C aryl; Y is 2-15C and a dihydric or trihydric hydrocarbon or a dihydric or trihydric polyoxyalkylene with a molecular weight of 70-6,000; and (n)) is 2 or 3) is the most desirable.
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