Suspensions of herbicide acetochlor in capsules and a method to improve the security of corn

摘要

The herbicides acetochlor in aqueous suspensions Capsules provide a commercially acceptable selectivity and weed control in corn.Claim 1: a capsule of acetochlor in aqueous suspension containing reduced levels of herbicide protector, which comprises: a) a microcapsule which comprises, with regard to the suspension of Capsule, from about 200 g / l up to about 700 g / l, where the microcapsule Includes: i) a polyurea Wall covered with water insolubleThe polyurea Wall covered with insoluble in water is prepared through interfacial polycondensation reaction between a water-soluble monomer diamine monomer of polyisocyanate and an oil soluble Amine where the molar ratio of the isocyanate groups is less than 1.1, The Wall Shell has a thickness of about 50 nm and less than about 150 nm,And the average particle size is about 2 mm to about 15 mm, and (ii) a Core internal Liquid, wherein the liquid Core internal has, with regard to the suspension of Capsule, from around 200 grams per litre (g / L) to around 550 g / l of acetochlor and des Around 0 g / l up to around 50 g / l of a Protector of herbicideWhere the ratio in weight of the herbicide acetochlor with protector is greater than about 10, where the weight of the liquid Core in the Inner Wall coated with polyurea insoluble in water is about 6 to about 30; (b) a continuous Water Phase buy With regard to the suspension, CapsuleFrom about 250 g / l to around 750 g / l of water; and (c) at least one between a Surfactant Emulsifier and Dispersant comprising one, with regard to the suspension of Capsule, from about 1 g / l up to around 100 g / L.