| 摘要 |
PROBLEM TO BE SOLVED: To provide a one-pack type curable composition that can produce a cured product having excellent weatherability without requiring a topcoat and having high tensile strength and rubber hardness in one-pack type excellent in workability and has excellent foaming prevention performance and to provide a one-pack type waterproof material.SOLUTION: The one-pack type curable composition comprises (A) an isocyanate group-containing urethane prepolymer produced by reacting (a-1) a polyoxyalkylene polyol having a number average molecular weight of not less than 1,000 to less than 3,000, (a-2) a polyol having a number average molecular weight of less than 1,000, (a-3) an epoxy(meth)acrylate having two or more hydroxyl groups in one molecule and (a-4) an isophorone diisocyanate, (B) a compound having an oxazolidine ring, (C) a first curing accelerator for accelerating the reaction of at least one of a secondary amine and a hydroxyl group generated by hydrolysis of the component (B) with the isocyanate group of the component (A) and (D) a second curing accelerator for accelerating the hydrolysis of the component (B). The one-pack type curing composition produces a cured product by curing the curable composition with water and the cured product satisfies the following (I) to (III): (I) the type D durometer hardness specified in JIS K 6253-3 is D40 or more; (II) the tensile strength at 23°C specified in JIS A 6021 is not less than 10 N/mm; and (III) the accelerated weather resistance specified in JIS K 5658 complies with a first class.SELECTED DRAWING: None |
