Method for the manufacture of slow-release fertilizers

Details Method for the manufacture of slow-release fertilizers Method for the manufacture of slow-release fertilizers

C - Chemistry, Metallurgy

05

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71/47

C05G 3/00 (2006.01) C05B 7/00 (2006.01) C05C 5/02 (2006.01) C05C 9/00 (2006.01)

Patent

CA 1309268

ABSTRACT OF THE DISCLOSURE A method for the manufacture of physically prepared slow-release fertilizer by coating fertilizer particles with at least one layer of a substantially water insoluble polymer possessing a three dimensional structure. The three dimensional structure results from a prepolymerized crosslinked unsaturated oil having between 12 to 20 carbon atoms and a iodine value of at least 120, the extent of crosslinking being above 5%. Optionally, the coating layer contains micronutrients and inert materials. In a preferred embodiment, the coating consists of three layers, the first being obtained with a high viscous unsaturated oil and the subsequent two layers with a lower viscosity unsaturated oil. The method is applicable for most of the known water-soluble fertilizers.

561811

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