| 摘要 |
PURPOSE:To provide a water-swellable compsn. contg. a styrenic elastomer, a highly water-absorbing resin and a tackifier, which is suitable as a high-performance and low-cost water stopper in civil engineering, construction and other fields of use and shows consistent water-tightness and water stopping effect. CONSTITUTION:The water-swellable compsn. contains a styrenic elastomer (e.g. styrene/butadiene/styrene block copolymer), a highly water absorbing resin [e.g. saponified vinyl acetate/(meth)acrylic ester copolymer] and a tackifier (e.g. rosin or petroleum resin). The compsn. absorbs water and shows a high degree of swelling and molded articles made thereof have a fusion bonding property and can be readily bonded to an object only by heating without additional use of an adhesive.
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