Particulate polymeric compositions having interparticle crosslinked aggregates of fine precursors
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United States of America Patent
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Jan 24, 1995
Grant Date -
N/A
app pub date -
Apr 2, 1990
filing date -
Apr 2, 1990
priority date (Note) -
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Abstract
Particulate, absorbent, polymeric compositions comprising interparticle crosslinked aggregates formed from precursor particles having a relatively small particle size. (i.e., fine precursor particles). The interparticle crosslinked aggregates comprise fine precursor particles of substantially water-insoluble, 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. The mass average particle size of the precursor particles is generally less than about 300 microns. Interparticle crosslinked aggregates formed from fine precursor particles have particularly high rates of fluid uptake with minimal gel blocking properties. The present invention also relates to methods for producing polymeric compositions containing such interparticle crosslinked aggregates and to absorbent products such as absorbent members or absorbent articles (sanitary napkins or diapers) incorporating such polymeric compositions.
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