Polymerization process for making porous polymeric particles
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United States of America Patent
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Jul 12, 1994
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N/A
app pub date -
Feb 1, 1993
filing date -
Feb 1, 1993
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Expired
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Abstract
A process for making porous polymeric particles having high surface area includes suspending a discontinuous organic phase in an continuous aqueous phase, wherein the organic phase includes an ethylenically unsaturated monomer, a water soluble phase extender and a surfactant in an amount effective to solubilize the water soluble phase extender in the monomer and wherein the aqueous phase includes a diffusion barrier agent for limiting mass transfer of the phase extender from the organic phase to the aqueous phase, and then polymerizing the ethylenically unsaturated monomer to form the porous polymeric particles.
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