Narrow particle size distribution porous microspheres and...

Details Narrow particle size distribution porous microspheres and... Narrow particle size distribution porous microspheres and...

2011-05-17

2011-05-17

Le, H. (Holly) T (Department: 1788)

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

C428S403000, C523S218000, C523S223000

Reexamination Certificate

active

07943236

ABSTRACT:
Porous polymer microspheres having a size of from about 3 to about 50 microns and a geometric standard deviation of about 1.25 or less are disclosed. The porous polymer microspheres are made by a method including the steps of preparing an emulsion comprised of polymer particles having an average particle size of less than about 3 microns and a diluent, subjecting the emulsion to an aggregating condition to form aggregated polymer particles, optionally coalescing the aggregated polymer particles, and removing the diluent to form the porous polymer microspheres.

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