| 摘要 |
PROBLEM TO BE SOLVED: To provide a two pack type sealing material composition that includes a specific organic solvent instead of a plasticizer for imparting flexibility thereto in order, solves problems caused by formulation of plasticizer and is useful for application of sealing materials to civil engineering and construction. SOLUTION: In the two pack type sealing material including a urethane prepolymer bearing chain terminal isocyanate groups as the main component, polyol, filler, plasticizer, and the curing agent components including the curing accelerating catalyst, 2-20 wt.% of a mixture of one or more selected from the group consisting of paraffinic hydrocarbons, polybutenes and naphthenic hydrocarbons, based on the mixture of the main components and the curing agent components are used instead of the plasticizer.
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