Durable controlled release microcapsules

Details Durable controlled release microcapsules Durable controlled release microcapsules

B - Operations, Transporting

01

J

167/166, 167/4.4

B01J 13/02 (2006.01) A01N 25/28 (2006.01) A61K 9/50 (2006.01) A61K 9/52 (2006.01) B01J 13/12 (2006.01)

Patent

CA 1258622

DURABLE CONTROLLED RELEASE MICROCAPSULES ABSTRACT Impact-resistant microcapsules for the sustained and controlled release of biologically active ingredients through a surrounding permeable polymeric wall are disclosed wherein the ratio by weight of active ingredient to polymer is from about 4:1 to about 1:4, the polymeric walls having high tensile yield and tensile impact strengths and low nitrogen permeabilities.

465355

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