Water-swellable elastomer composition
AssigneeSeitetsu Kagaku Co., Ltd.
InventorsMorio Nakamura, Shigeji Obayashi, Shinichi Takemori, Hitoshi Tanaka, Motomu Hirakawa
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Abstract
Water-swellable elastomer composition consisting essentially of a homogeneous mixture of an elastomer, a water-absorbent resin and a water-soluble resin. Said composition exhibits a high degree of swelling and a high swelling rate when it is soaked in water. Also, said composition retains swellability even when it is put in contact with water for a long period of time.
Claims15
A water-swellable elastomer composition consisting essentially of a homogeneous mixture of an elastomer 5-300 parts by weight of a water-absorbent resin per 100 parts by weight of the elastomer and wherein said water-absorbent resin absorbs water in an amount of at least 20 times the weight of the resin and has particle size of 400 .mu.m or less, and 1-50 parts by weight of a water-soluble resin per 100 parts by weight of the elastomer.
Dependencies are inferred from the claim text.