Absorbing agents for water and aqueous liquids and process for their production and use
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United States of America Patent
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Jun 11, 2002
Grant Date -
N/A
app pub date -
Mar 21, 2000
filing date -
Aug 9, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a powdery, cross-linked polymer absorbing water and aqueous liquids formed of polymerized, unsaturated, acid groups-containing monomers that are present as salts neutralized to the extent of at least 50 mol-% and which optionally comprise further monomers which are copolymerizable with the acid groups-containing monomers as well as water-soluble polymers, the polymer being formed of acidic, polymerized monomers partially neutralized to the extent of 5-30 mol-%, relative to the acid groups-containing monomer portion. The polymer has a high retention, high liquid absorption under pressure, high swelling pressure, and a low content of soluble components. The present invention further relates to a process for the production of said polymer and to its use as a component in sanitary articles which absorb body fluids and in wound dressings, in current-conducting and light-transmitting cables, as soil conditioners, as a component in packaging materials and in depot materials for the controlled release of active substances.
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