Granular coated fertilizer and method for producing the same
AssigneeSumitomo Chemical Company, Limited
InventorsYasuhiro Hirano, Yutaka Yamaguchi, Hiroshi Nakamura
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Abstract
Provided is a granular fertilizer coated with a thermosetting resin coating, characterized in that a dissolution rate of the fertilizer is retarded by containing a hydrophobic compound in at least one of the coating portion and the fertilizer portion thereof. The dissolution rate is further retarded than that of a conventional granular coated fertilizer coated with a thermosetting resin.
Claims12
A granular coated fertilizer comprising a fertilizer portion and a coating of a thermosetting resin, wherein at least one member selected from the group consisting of said fertilizer portion and said coating contains a hydrophobic compound that retards a dissolution rate of the fertilizer.
A method for producing a granular coated fertilizer comprising the step of:
- (A) coating a granular fertilizer, to which a hydrophobic compound is previously added, with a thermosetting resin;
- (B) coating a granular fertilizer with a thermosetting resin, to which a hydrophobic compound is previously added;
- (C) coating a granular fertilizer with a thermosetting resin while adding a hydrophobic compound intermittently or continuously, to a mixture of the granular fertilizer and the thermosetting resin, either during or after the granular fertilizer is coated with the thermosetting resin;
- or
- (D) using two or more steps of steps A to C in combination.
Dependencies are inferred from the claim text.