Elastomeric controlled release formulation and article...

Details Elastomeric controlled release formulation and article... Elastomeric controlled release formulation and article...

A - Human Necessities

01

N

167/166, 71/47,

A01N 25/10 (2006.01) A01N 25/18 (2006.01) A61K 9/20 (2006.01) A61K 9/22 (2006.01) A61K 47/00 (2006.01) C08G 18/69 (2006.01) C08K 5/00 (2006.01)

Patent

CA 1242142

- 27 - Abstract of the Disclosure Means for the sustained release of an active agent into the environment comprise an elastomeric matrix and the active agent contained in the matrix. The matrix material has a modulus between about 104 Pa and about 108Pa at 73°C, and a glass transition temperature less than 0°C. The matrix comprises Polyurethane formed by reacting polyol and isocyanate, and the active agent can be any biologically or nonbiologically active agent that is compatible with the matrix, e.g., the insecticide 2,2' dichlorovinyl dimethyl phosphate. The inventive sustained release system has particularly advantageous release properties, e.g., it typically can release more than 70% of the active agent contained in the matrix.

508060

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