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US 11,377,395 B2Granted
Controlled-release type fertilizer with decreased floating property comprising polyoxyethylene alky(-aryl) ether and method for preparing the same
AssigneeLG Chem, Ltd.
InventorsMihee Kim, Hyo Sook Joo, Eun Kyoung Park, Hyeon Choi, Ki Youl 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.
Claims11
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, wherein the polyoxyethylene alkyl(-aryl)ether includes hydrophilic groups in an amount of 30 to 70 wt %, based on the total weight of the polyoxyethylene alkyl(-aryl)ether, and the controlled-release type fertilizer comprises the additives in an amount of 0.001 wt % to 0.05 wt %, based on the total weight of the controlled-release type fertilizer,
- wherein the polyoxyethylene alkyl(-aryl)ether includes hydrophobic groups in an amount of 30 to 70 wt %, based on the total weight of polyoxyethylene alkyl(-aryl)ether, and
- wherein the hydrophobic groups in the polyoxyethylene alkyl(-aryl)ether have a weight average molecular weight of 50 to 300.
3 more elements
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, wherein the polyoxyethylene alkyl(-aryl)ether includes hydrophilic groups in an amount of 30 to 70 wt %, based on the total weight of the polyoxyethylene alkyl(-aryl)ether, and
- wherein the coating step ii) comprises adding the liquid additives in an amount of 0.001 wt % to 0.05 wt % based on the total weight of the controlled-release type fertilizer,
- wherein the polyoxyethylene alkyl(-aryl)ether includes hydrophobic groups in an amount of 30 to 70 wt %, based on the total weight of polyoxyethylene alkyl(-aryl)ether, and
- wherein the hydrophobic groups in the polyoxyethylene alkyl(-aryl)ether have a weight average molecular weight of 50 to 300.
3 more elements
Dependencies are inferred from the claim text.