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AssigneeChisso Corporation
InventorsToshio Fujita, Yoshisato Yamashita, Shigemitsu Yoshida, Katsutoshi Yamahira
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A granular fertilizer with a coating which is decomposable by soil microorganisms, preferably a coating which is decomposed and degraded both on the surface layer of the soil and in the soil, and a process for producing the granular fertilizer, which coating contains a poly 3-hydroxy-3-alkylpropionic acid as an indispensable ingredient, and if necessary, a resin or a low-molecular resin and further, if necessary, an inorganic or organic powder, and which process comprises adding an organic solvent solution of the poly 3-hydroxy-3-alkylpropionic acid, and if necessary, the resin, and if necessary the powder (dispersed in the solution) to a granular fertilizer in fluided state in the form of spray, and when added, blowing a high speed hot air stream onto the fertilizer to thereby instantaneously remove the solvent and also dry the resulting fertilizer.
A granular fertilizer the surface of which is provided with a decomposable coating said coating comprising a microorganism and light-degradative resin composition that contains a poly-3-hydroxy-3-methylpropionic acid or a poly-3-hydroxy-3-ethylpropionic acid as a soil microorganism-decomposable ingredient for the coating, the ratio by weight of the poly-3-hydroxy-3-methylpropionic acid or poly-3-hydroxy-3-ethylpropionic acid to said light-degradative resin composition being 0.1 to 0.9 when the material for the coating consists only of these two kinds of material.
A process for producing a granular fertilizer coated with a decomposable coating said coating comprising a microorganism and light-degradative resin composition acid;
Dependencies are inferred from the claim text.