Polymeric carrier compositions and methods for their...

Details Polymeric carrier compositions and methods for their... Polymeric carrier compositions and methods for their...

A - Human Necessities

61

K

167/159, 167/314

A61K 31/74 (2006.01) A61K 7/42 (1990.01)

Patent

CA 1310583

POLYMERIC CARRIER COMPOSITIONS AND METHODS FOR THEIR PREPARATION AND USE ABSTRACT OF THE DISCLOSURE Polymeric delivery systems for active substances are prepared by suspension polymerization of a porogen and monomer mixture in an immiscible phase, typically an aqueous immiscible phase. By properly controlling the polymerization conditions and percentage of cross-linking, relatively rigid beads are formed having a non-collapsible pore network containing the porogen. The porogen is then extracted from the pore network, and an active substance, such as a UV absorbant, and insect repellant, a steroid, an emollient, or the like, is introduced into the beads.

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