Temperature sensitive water absorbing and discharging polymer composition
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United States of America Patent
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Sep 30, 1997
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N/A
app pub date -
Sep 5, 1995
filing date -
Feb 10, 1994
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Abstract
A temperature sensitive water absorbing and discharging polymer composition having a predetermined selected temperature sensing point, which controls water absorbability, is obtained by polymerizing in an aqueous solution N-alkyl acrylamide derivatives with acrylic acid, alkali metal salts of acrylic acid or mixtures thereof, and diacetone acrylamide. The temperature sensitive water absorbing and water discharging polymer composition is modified to control the temperature sensing point and has a high water discharging and absorbing property above and below the temperature sensing point. The composition is utilized in a wide variety of sanitary materials such as paper diapers, soil improvers in agricultural and horticultural fields for plants and vegetables such as soil water supplying agents or soil water retaining agents, water proof sealing materials, sandbags, temperature sensors, chemical valves, solid-liquid separation materials and liquid concentrating materials.
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