PESTICIDE AGENTS WITH COVER, METHODS OF THEIR PREPARING AND COMPOSITIONS CONTAINING THEREOF Russian patent published in 2000 - IPC

FIELD: agriculture, pesticides. SUBSTANCE: invention describes method of preparing pesticide agent with cover in aqueous medium that involves: a) preparing aqueous mixture of pH-depending polymer and plasticizer; b) dissolution of pH-depending polymer by bringing about the mixture from the stage (a) with base to pH value above that of solubilization of this polymer; c) addition of pesticide agent from the stage (b), ultraviolet protecting agent being optionally stilbene derivative, optionally disintegrating agent and optionally addition to increase fluidity of dry product/decrease of stickiness to solution and mixing to obtain homogeneous suspension containing dissolved pH-depending polymer; d) drying homogeneous suspension from the stage (c) and optionally e) milling dry product from the stage (d). pH-Depending polymer is taken among the group consisting of copolymer of methacrylic acid and methylmethacrylate and their mixtures and copolymer of maleic anhydride and styrene. Obtained pesticide agent with cover retains the significant level of its parent activity after ultraviolet irradiation. EFFECT: improved properties and quality of agents, improved method of preparing. 10 cl, 9 tbl