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    • 6. 发明授权
    • Self-healing bentonite sheet material composite article
    • 自愈膨润土片材复合制品
    • US4810573A
    • 1989-03-07
    • US75567
    • 1987-07-20
    • Todd D. Harriett
    • Todd D. Harriett
    • B32B27/20C09D5/34C09J123/02C09K3/10B32B19/00B32B9/04B32B29/04
    • B32B27/22B32B19/02B32B27/20C09D5/34C09J123/02Y10T428/259Y10T428/31844Y10T428/31917Y10T428/3192Y10T428/31931
    • 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, conduit, floor, roof, or other structure to be protected from water contact, on an exposed major surface in areas of potential water flow to prevent the seepage of water through the bentonite clay composition layer. In one 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.
    • 本发明涉及一种层状水封制品,其包括粘附到包含与聚丙烯,聚丁烯或其混合物紧密接触的非水合水溶性粘土的组合物层的柔性片材层,特别用作 一个水障碍。 水可溶胀粘土组合物可以以任何方式粘合到柔性片材上,例如通过将片状的组合物挤出到片材层上。 粘土组合物层具有足够的粘性以在一个主表面上粘附到片材上,并且对于粘附到壁,导管,地板,屋顶或其他防止水接触的结构,在暴露的主表面上具有足够的粘性 潜在的水流区域,以防止渗透通过膨润土粘土组合物层的水。 在一个实施方案中,粘土组合物层包括聚丙烯和/或聚丁烯和弹性体,例如丁基橡胶,其在水合时具有足够的弹性以随膨胀的水溶胀性粘土组合物拉伸或膨胀,并且有助于维持结构完整性 和粘土组合物的凝聚力。 在另一个实施方案中,粘土组合物层包含水溶胀性粘土,弹性体和与弹性体相容的任何增塑剂。