Microencapsulated solid pesticides
AssigneeSyngenta Crop Protection AG
InventorsKenichi Kitagaki, Hironori Kataoka
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Abstract
A microcapsule characterized by comprising a solid pesticide as a core material coated with a wall material which is a resin formed by polycondensation of a sparingly water-soluble melamine-formaldehyde resin type prepolymer (said sparingly water-soluble melamine-formaldehyde resin type prepolymer dissolves 2000 g or less of water therein per 100 g of solid component of the prepolymer at +25° C.) in the presence of a dispersant which is a condensation product of naphthalenesulfonic acid and/or alkylnaphthalenesulfonic acid and formaldehyde or a salt thereof, a method for producing said microcapsule, and a method for applying said microcapsule are disclosed.
Claims24
A microcapsule comprising a solid pesticide as a core material, which is coated with a wall material, which wall material is a resin formed by subjecting a sparingly water-soluble melamine-formaldehyde resin prepolymer to a polycondensation reaction in the presence of a dispersant, which dispersant is a condensation product of naphthaienesulfonic acid and/or alkylnaphthalenesulfonic acid and formaldehyde or a salt of said condensation product, characterised in that the solubility of water in said sparingly water-soluble melamine-formaldehyde resin prepolymer is 2000 g or less of water per 100 g of the solid component of the prepolymer at +25° C.
Dependencies are inferred from the claim text.