One-step method of coating nutrient particles
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United States of America Patent
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Nov 13, 1990
Grant Date -
N/A
app pub date -
Apr 12, 1988
filing date -
Apr 12, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A one-step method of preparing coated particulate plant nutrients wherein a polyfunctional coupling agent is applied to a mobile mass of plant nutrient particles containing functional groups which are chemically reactive with the functional groups of the coupling agent, while simultaneously applying a second reactive material containing functional groups also reactive with the functional groups of the coupling agent, maintaining the mobile mass at a temperature between 30.degree. C. and 300.degree. C. until a strong, water-insoluble particle. The product of the one-step method is a controlled-release plant nutrient having excellent attrition resistance.
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