| 摘要 |
PURPOSE:To obtain an agricultural pharmaceutical, by the presence of at least one agricultural chemical ingredient or adding agricultural chemical ingredients after forming a gel, impregnating the gel with the ingredients and drying the resultant gel in subjecting a specific alkyl silicate to hydrolysis and polycondensation reaction. CONSTITUTION:At least one alkyl silicate expressed by formula I [R1-R4 are H or formula II (X is 1-5; y is 0-10) and all R1-R4 are not H; n is 0-20] (e.g. a compound expressed by formula III) is subjected to hydrolysis and polycondensation reaction. In the process, the above-mentioned reaction is carried out in the presence of an agricultural chemical ingredient (especially preferably herbicide or insecticide) or a gel is formed by the afore-mentioned reaction, then impregnated with the agricultural chemical ingredients and dried to afford an agricultural chemical pharmaceutical. Thereby the pharmaceutical in the form of the agricultural ingredients sufficiently contained even to the interior of powder is obtained and the efficacy of an agricultural chemical having a short life and low residual effect can be sustained for a long period. The pharmaceutical has water resistance without causing phytotoxicity.
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