Water-expandable silane-crosslinked rubber composition, water-expandable silane-crosslinked rubber molded body, and water-stopping material

摘要

PROBLEM TO BE SOLVED: To form a water-expandable silane crosslinked rubber composition and a water-expandable silane crosslinked rubber composition, which suppresses deterioration of expandability and restorability and also copes with a problem of productivity. Provided are a crosslinked rubber molded body and a water blocking material made by using a water-expandable silane crosslinked rubber composition. SOLUTION: A water-expandable silane crosslinked rubber composition having a volume expansion coefficient difference (Yw) during repeated water absorption of 15% or less and a volume contraction coefficient difference (Zw) during repeated moisture drainage of 5.0% or less. A water-expandable silane crosslinked rubber molded body and a water blocking material obtained by molding or using this composition. [Selection diagram] None