Coacervated highly absorptive polymers
AssigneeDow Corning Corporation
InventorsTina M. Gressani, William L. Klein
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Abstract
A composition which is includes discrete particles of a highly cross-linked macroporous hydrophobic polymer. The particles are of a first predetermined average diameter, and the polymer particles have entrapped therein and dispersed uniformly throughout an active ingredient. The composition also includes a coacervating agent mixed with the polymer particles in an amount sufficient to cause the polymer particles to collect forming dense clusters of coacervated particles of a second predetermined average diameter, the second predetermined average diameter being substantially in excess of the first predetermined average diameter.
Claims13
A composition comprising discrete particles of a highly cross-linked macroporous polymer, the particles being of a first predetermined average diameter, the polymer particles having entrapped therein and dispersed uniformly throughout an active ingredient, the particles including unit particles of less than about one micron in average diameter, agglomerates of fused unit particles of sizes in the range of about twenty to eighty microns in average diameter, and aggregates of clusters of fused agglomerates of sizes in the range of about two-hundred to about twelve-hundred microns in average diameter, and a coacervating agent mixed with the polymer particles in an amount sufficient to cause the polymer particles to collect forming dense clusters of coacervated particles of a second predetermined average diameter, the second predetermined average diameter being substantially in excess of the first predetermined average diameter.
Dependencies are inferred from the claim text.