A controlled-release type fertilizer with decreased floating property comprising polyoxyethylene alky(-aryl) ether and method for preparing the same
AssigneesLG Chem, Ltd., Farmhannong Co., Ltd.
InventorsMihee KIM, Hyosook JOO, Eun Kyoung PARK, Hyeon CHOI, Kiyoul YOON, Joon Seok LEE
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Abstract
The present invention relates to a controlled-release type fertilizer with remarkably decreased floating property, comprising a granular fertilizer core; a coating layer (shell) formed on the surface of the granular fertilizer core, and comprising olefin-based resin; and additives attached on the coating layer, and comprising polyoxyethylene alkyl(-aryl)ether.
Claims16
A controlled-release type fertilizer comprising;
- a granular fertilizer core;
- a coating layer formed on the surface of the granular fertilizer core, the coating layer comprising an olefin-based resin;
- and
- additives attached on the coating layer, the additives comprising a polyoxyethylene alkyl(-aryl)ether.
The controlled-release type fertilizer according to claim 4, wherein the hydrophobic groups in the polyoxyethylene alkyl(-aryl)ether have a weight average molecular weight of 50 to 300.
The controlled-release type fertilizer according to claim 54, wherein the hydrophilic groups in the polyoxyethylene alkyl(-aryl)ether have a weight average molecular weight of 100 to 1000.
A method for preparing a controlled-release type fertilizer, comprising the steps of:
- i) coating the surface of a granular fertilizer core with a coating composition comprising an olefin-based resin to form a first coating layer;
- and
- ii) coating the first coating layer with liquid additives comprising a polyoxyethylene alkyl(-aryl)ether.
Dependencies are inferred from the claim text.