| 摘要 |
PROBLEM TO BE SOLVED: To provide a two component urethane waterproof material composition, which is environment-friendly, has excellent adhesivity to a top coat, suppresses interlayer swelling in summer time application, and provides a film having excellent heat resistance in winter time application.SOLUTION: A two component urethane waterproof material composition comprises a main agent containing an isocyanate group-terminated prepolymer obtained by a reaction of tolylene diisocyanate and a polyol, and a hardener containing 3,3'-dichloro-4,4'-diaminodiphenylmethane and a polyol as reactive components, and contains in a hardened material an alkaline earth metal salt of an organic acid as a urethanization catalyst. Specifically provided is a two component urethane waterproof material composition containing diethyltoluenediamine in the hardener and an imidazole compound having substituents at 1- and 2-positions as a urethanization catalyst, in which the alkaline earth metal salt of an organic acid is a calcium salt of an organic acid or a barium salt of an organic acid. |
