Porous, absorbent, polymeric macrostructures and methods of making the same
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United States of America Patent
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Jun 23, 1992
Grant Date -
N/A
app pub date -
Apr 2, 1990
filing date -
Apr 2, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Absorbent polymeric macrostructures that are porous and comprise an interparticle crosslinked aggregate having a circumscribed dry volume greater than about 10.0 mm.sup.3. The interparticle crosslinked aggregrate comprises a multiplicity of precursor particles of substantially water-soluble, absorbent, hydrogel-forming, polymer material; and an interparticle crosslinking agent reacted with the polymer material of the precursor particles to form crosslink bonds between the precursor particles. Because of the particulate nature of the precursor particles, the macrostructure has pores between adjacent precursor particles. The pores are interconnected by intercommunicating channels such that the macrostructure is liquid permeable.
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