Variable release microcapsules
AssigneeSyngenta Limited
InventorsIan Malcolm Shirley, Juanita Elena Van Koppenhagen, Herbert Benson Scher, Richard Follows, Philip Wade, Fergus Gerard Paul Earley, Dianne Beth Shirley
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Abstract
A novel microcapsule comprising a liquid core material which is substantially insoluble in water and enclosed within a solid permeable shell of a polymer resin containing disulfide linkages is disclosed. The process for producing such microcapsules is likewise disclosed.
Claims11
A microcapsule comprising a liquid core material which is substantially insoluble in water and enclosed within a solid permeable shell of a polymer resin containing disulfide linkages.
A microcapsule capable of a variable rate of release of an encapsulated liquid core material, wherein the microcapsule comprises a liquid core material which is substantially insoluble in water encapsulated within a solid permeable shell of a polymer resin comprising one or more disulfide linkages, wherein the liquid core material comprises one or more pesticides;
- wherein the liquid core material is gradually released by diffusion through the solid permeable shell in a first environment that does not cleave the disulfide linkages;
- and wherein the liquid core material is quickly released in a second environment that cleaves the disulfide linkages.
Dependencies are inferred from the claim text.