Hydrophilic polymeric material
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United States of America Patent
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Apr 11, 2000
Grant Date -
N/A
app pub date -
Jun 27, 1997
filing date -
Jun 27, 1997
priority date (Note) -
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Abstract
The present invention relates to a porous crosslinked hydrophilic polymeric material having cavities joined by interconnecting pores wherein at least some of the cavities at the interior of the material communicate with the surface of the material. The present invention also relates to a process for producing the polymeric material. This process involves combining a hydrophilic monomer phase with an oil discontinuous phase to form an emulsion, and polymerizing the emulsion. The emulsion can be a high internal phase emulsion (i.e., a 'HIPE'). The polymeric material can be produced in a variety of forms. In one embodiment the emulsion is suspended in an oil suspension medium, and emulsion droplets are polymerized to produce polymeric microbeads.
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