| 摘要 |
<p>A water-swellable adhesive water stop having improved workability and high water-stopping power comprises a shaped and vulcanized rubber composition comprising: (A) a butyl rubber; (B) a highly water-absorptive resin; (C) an inorganic water-absorbent; (D) a tackifier; (E) a plasticizer; (F) a vulcanizing agent; and, optionally, (G) a basic filler each in a limited amount relative to the component (A). The water stop has a tensile strength in the range from 1 to 30 kgf/cm<2>, 100% elastic modulus in the range from 1 to 4 kgf/cm<2>, ultimate elongation at break of at least 300% and degree of swelling in water in the range from 150 to 500% by weight after immersion in water for 21 days at 23<o>C.</p> |
