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US 11,440,856 B2Granted
Controlled-release fertilizer compositions
AssigneeOMS Investments, Inc.
InventorsKwame Owusu-Adom, Christian Baldwin
Life of this patent
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Abstract
A controlled-release fertilizer composition includes coated fertilizer particles having granules substantially encapsulated with a polyurethane coating layer formed from a polyol composition and an isocyanate curing agent. The polyurethane coating layers include inorganic particles. Methods of making and using the controlled-release fertilizer compositions are also disclosed.
Claims20
A controlled-release fertilizer composition comprising:
- coated fertilizer particles each comprising a granule and one or more polyurethane coating layers, wherein the one or more polyurethane coating layers substantially encapsulate the granule;
- and
- wherein the one or more polyurethane coating layers are formed from the reaction product of a hydrophobic aromatic amine polyol composition and an isocyanate curing agent;
- and
- wherein at least one of the one or more polyurethane coating layers comprises inorganic particles.
2 more elements
A method of making a controlled-release fertilizer composition comprising:
- coating granules with a hydrophobic aromatic amine polyol composition;
- dispersing inorganic particles onto the polyol composition;
- and
- applying an isocyanate curing agent to the polyol composition to form a polyurethane coating layer substantially encapsulating each granule;
- and
- wherein the polyol composition is miscible with the isocyanate curing agent.
3 more elements
Dependencies are inferred from the claim text.