Asymmetrische mikroporöse Kügelchen für regulierbare Freigabe

A controlled release device is disclosed, the device comprising active ingredient in the pores of a polymeric microporous bead having an anisotropic pore structure of large pores in the interior and small pores at the surface, the gradation of pore sizes between the interior and the surface being co...

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Bibliographische Detailangaben
Hauptverfasser: BROOKE, JAMES W., SISTERS, OREGON 97759, US, SMITH, KELLY L., BEND, OREGON 97701, US, HOLMES, MATTHEW F., BEND, OREGON 97701, US
Format: Patent
Sprache:ger
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Zusammenfassung:A controlled release device is disclosed, the device comprising active ingredient in the pores of a polymeric microporous bead having an anisotropic pore structure of large pores in the interior and small pores at the surface, the gradation of pore sizes between the interior and the surface being continuous.