Precoated controlled release fertilizers and processes for their

Details Precoated controlled release fertilizers and processes for their Precoated controlled release fertilizers and processes for their

1998-06-09

2000-03-21

Straub, Gary P.

Chemistry: fertilizers

Processes and products

71 6401, 71 6407, 71 6411, 71 28, A01N 2500, A01N 2508, A01N 2510, C05C 900

Patent

active

060397810

ABSTRACT:
A controlled release fertilizer formed from nutrient granules having intermediate or precoat layers of organic oil, such as raw linseed oil, prior to application of a polymeric, encapsulating coat. The precoat may also contain a binding agent, such as a fine clay, and a drier. The new fertilizer composition is made by a process of applying the oil precoat, but not curing it until after the encapsulating coat is applied. The use of the precoat provides more desirable controlled (delayed) release characteristics at a lower weight of the encapsulating coat, particularly for nutrient cores having a relatively large number of surface imperfections or discontinuities.

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