The present invention relates to a layered water sealing article of manufacture including a layer of a flexible sheet material adhered to a layer of a composition comprising a non-hydrated water-swellable clay intimately contacted with a polypropene, polybutene, or mixtures thereof particularly useful as a water barrier. The water swellable clay composition can be adhered to the flexible sheet material in any manner, such as by extruding the composition in sheet form onto a layer of sheet material. The clay composition layer is sufficiently tacky to adhere to the sheet material on one major surface, and is sufficiently tacky for adherence to a wall or conduit, floor or roof on an exposed major surface in areas of potential water flow to prevent the seepage of water through the bentonite clay composition layer. In the embodiment, the clay composition layer includes a polypropene and/or a polybutene and an elastomer, such as butyl rubber, having sufficient resilience to stretch or expand with the expanding water-swellable clay composition upon hydration and to aid in maintaining the structural integrity and cohesiveness of the clay composition. In another embodiment, the clay composition layer comprises a water-swellable clay, an elastomer, and any plasticizer compatible with the elastomer.
本发明涉及一种分层防
水密封制品,包括一层柔性片状材料,上面粘有一层组合物,该组合物包括与聚
丙烯、聚
丁烯或它们的混合物紧密接触的非
水化遇
水膨胀粘土,特别适用于作为防
水层。
水膨胀性粘土组合物可以以任何方式粘附到柔性片状材料上,例如将片状组合物挤压到片状材料层上。粘土组合物层具有足够的粘性,可以粘附在薄片材料的一个主要表面上,并具有足够的粘性,可以粘附在潜在
水流区域的墙壁或导管、地板或屋顶的暴露主要表面上,以防止
水通过膨润土粘土组合物层渗出。在本实施例中,粘土成分层包括聚
丙烯和/或聚
丁烯以及弹性体(如
丁基橡胶),弹性体具有足够的回弹性,在
水化时可与膨胀的含
水粘土成分一起拉伸或膨胀,并有助于保持粘土成分的结构完整性和内聚性。在另一个实施方案中,粘土组合物层包括
水膨胀粘土、弹性体和任何与弹性体相容的
增塑剂。