Method of producing uniform polymer beads of various sizes
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United States of America Patent
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Aug 16, 2016
Grant Date -
Jul 12, 2012
app pub date -
Jan 6, 2012
filing date -
Jan 7, 2011
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Abstract
Speriodal polymer beads having a uniform size are prepared by polymerizing uniformly sized monomer droplets formed by dispersing a polymerizable monomer phase over a cross-flow membrane into an aqueous phase. A shear force is provided at a point of egression of the polymerizable monomer phase into the aqueous phase, the direction of shear substantially perpendicular to the direction of egression of the monomer phase. The polymer beads can be employed in applications where beads having uniform diameters of 10 to 180 μm are useful.
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