Abstract: An object of the present invention is to provide a technique for producing a microcapsule containing a pesticidal compound in a fatty acid ester such as methyl O-acetylricinoleate, which delays the release timing of the pesticidal compound as compared to a conventional microcapsule. Provided is a method for producing a microcapsule, which comprises: (1) keeping a mixture of a pesticidal compound, a compound represented by formula (I): wherein X represents —CH2—CH2— or —CH?CH—, R1 represents a C1-C4 alkyl group, and R2 represents a C1-C4 alkyl group, and a polyisocyanate at 20 to 60° C. for 3 hours or more; (2) adding the mixture to water containing a polyol or a polyamine to prepare liquid droplets in the water; and (3) forming a film of polyurethane or polyurea around the droplets.

Abstract: Water dispersible granules are provided containing (a) an agrochemical active ingredient that is solid at 25° C., (b) a polyoxyalkylene alkyl ether phosphate or its salt, (c) at least one anionic surfactant selected from the group consisting of arylsulfonates or their formaldehyde condensates, ligninsulfonates, and polycarboxylates, and (d) lactose. The granules are water dispersible granules having good disintegrability and dispersibility in water and also having good storage stability. The water dispersible granules can be disintegrated and dispersed in a small amount of water. Accordingly, the water dispersible granules can be mixed with paste fertilizers to produce agrochemical-containing paste fertilizers, which can also be used in paddy fields and are useful water dispersible granules.

Abstract: Water dispersible granules are provided containing (a) an agrochemical active ingredient that is solid at 25° C., (b) a polyoxyalkylene alkyl ether phosphate or its salt, (c) at least one anionic surfactant selected from the group consisting of arylsulfonates or their formaldehyde condensates, ligninsulfonates, and polycarboxylates, and (d) lactose. The granules are water dispersible granules having good disintegrability and dispersibility in water and also having good storage stability. The water dispersible granules can be disintegrated and dispersed in a small amount of water. Accordingly, the water dispersible granules can be mixed with paste fertilizers to produce agrochemical-containing paste fertilizers, which can also be used in paddy fields and are useful water dispersible granules.

Abstract: The present invention is intended to provide a technique for delaying timing for releasing an agricultural chemical compound from a microcapsule formulation which contains the agricultural chemical compound in at least one compound from the group of consisting of ester compounds and aromatic hydrocarbon compounds. A microcapsule formulation produced by the following process is more effectively controlled in release of an agricultural chemical compound therefrom, than any of the existing microcapsule formulations. This production process comprises the steps of (1) maintaining a mixture of an agricultural chemical compound (a), at least one compound (b) selected from the group consisting of ester compounds and aromatic hydrocarbon compounds, except for the compounds of the formula (I): (wherein X represents —CH2—CH2— or —CH?CH—; R1 represents a C1-C4 alkyl group; and R2 represents a C1-C4 alkyl group), and a polyisocyanate (c) at a temperature of from 20 to 80° C.

Abstract: The present invention is intended to provide a technique for delaying timing for releasing an agricultural chemical compound from a microcapsule formulation which contains the agricultural chemical compound in at least one compound from the group of consisting of ester compounds and aromatic hydrocarbon compounds. A microcapsule formulation produced by the following process is more effectively controlled in release of an agricultural chemical compound therefrom, than any of the existing microcapsule formulations. This production process comprises the steps of (1) maintaining a mixture of an agricultural chemical compound (a), at least one compound (b) selected from the group consisting of ester compounds and aromatic hydrocarbon compounds, except for the compounds of the formula (I): (wherein X represents —CH2—CH2— or —CH?CH—; R1 represents a C1-C4 alkyl group; and R2 represents a C1-C4 alkyl group), and a polyisocyanate (c) at a temperature of from 20 to 80° C.

Abstract: An object of the present invention is to provide a technique for producing a microcapsule containing a pesticidal compound in a fatty acid ester such as methyl O-acetylricinoleate, which delays the release timing of the pesticidal compound as compared to a conventional microcapsule. Provided is a method for producing a microcapsule, which comprises: (1) keeping a mixture of a pesticidal compound, a compound represented by formula (I): wherein X represents —CH2—CH2— or —CH?CH—, R1 represents a C1-C4 alkyl group, and R2 represents a C1-C4 alkyl group, and a polyisocyanate at 20 to 60° C. for 3 hours or more; (2) adding the mixture to water containing a polyol or a polyamine to prepare liquid droplets in the water; and (3) forming a film of polyurethane or polyurea around the droplets.