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US 6,555,122 B2Granted
Dry water-dispersible compositions of microencapsulated pesticides
AssigneeSyngenta Limited
InventorsRay Jia Ruey Lo, Jin Ling Chen, Herbert Benson Scher, Juanita Elena Van Koppenhagen, Ian Malcolm Shirley
Life of this patent
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Abstract
Solid water-dispersible compositions containing microencapsulated pesticides are produced by spray-drying an aqueous suspension of said pesticides in the presence of a water-soluble polymer.
Claims12
A water dispersible composition comprising microcapsules wherein each microcapsule comprises
- (a) a core comprising at least one water-insoluble pesticide within
- (b) a polymeric shell comprising a polyurea or a urea/formaldehyde copolymer,
- said microcapsules being contained within a matrix comprising one or more water-soluble polymers wherein said one or more water-soluble polymers are present in an amount of from about 4 to about 15 weight percent of said water-dispersible composition and in which at least one of said water-soluble polymers is a copolymer or homopolymer of acrylic acid.
Dependencies are inferred from the claim text.