Granular fertilizers and methods of making same
AssigneePursell Agri-Tech, LLC
InventorsTimothy Gene Holt, Trenton Cole Gillis
Life of this patent
Estimating the term…
Abstract
Coated granules and methods of making the coated granules that prevent the coated granules from floating and/or drifting due to water current and wind are disclosed. The coated granules may include a core having a water-soluble compound, such as a fertilizer; a controlled release layer; a surface treatment including a surfactant to reduce water tension; and an optional coating disposed between the controlled release layer and the surface treatment layer that includes a gelling agent, such as a super absorbent polymer, that may help to anchor the coated granules to the surface of the soil and reduces the chance of relocation due to rolling.
Claims24
A coated fertilizer granule, comprising:
- a core comprising a water-soluble fertilizer material;
- a coating comprising a urethane layer impregnated with a gelling agent;
- a controlled release layer disposed between the core and the coating;
- and
- a surface treatment layer disposed on the coating and comprising a surfactant and a solvent, wherein the surfactant comprises alkyl polyglycoside, ethoxylated sorbitan ester, polyhydric alcohol, or a combination thereof.
A fertilizer granule, comprising:
- a core comprising a water-soluble fertilizer material;
- a surface treatment layer comprising a surfactant and a solvent, wherein the surfactant comprises alkyl polyglycoside, ethoxylated sorbitan ester, polyhydric alcohol, or a combination thereof;
- and
- a controlled release layer disposed between the core and the surface treatment layer, wherein the controlled release layer comprises at least one urethane layer and at least one wax layer.
A method of making a coated fertilizer granule, comprising:
- providing a core comprising a water-soluble fertilizer material;
- applying a controlled release layer disposed over the core to form a controlled release core;
- applying a coating over the controlled release core to form a coated core, wherein the coating comprises a urethane layer impregnated with a gelling agent;
- and
- applying a surface treatment layer over the coated core, the outer surface treatment layer comprising a surfactant and a solvent, wherein the surfactant comprises alkyl polyglycoside, ethoxylated sorbitan ester, polyhydric alcohol, or a combination thereof.
A coated fertilizer granule, consisting of:
- a core comprising a water-soluble fertilizer material;
- a urethane layer impregnated with a gelling agent;
- a controlled release layer including at least one urethane layer and at least one wax layer and disposed between the core and the urethane layer;
- and
- a surface treatment layer disposed on the urethane layer and formed from a composition including a surfactant and a solvent, wherein the surfactant comprises alkyl polyglycoside, ethoxylated sorbitan ester, polyhydric alcohol, or a combination thereof.
Dependencies are inferred from the claim text.