Improved polymer-sulphur-polymer coated fertilizers

Details Improved polymer-sulphur-polymer coated fertilizers Improved polymer-sulphur-polymer coated fertilizers

C - Chemistry, Metallurgy

05

G

C05G 5/00 (2006.01) C05C 9/00 (2006.01) C05G 3/00 (2006.01)

Patent

CA 2312570

The present invention described a polymer coated fertilizer, such as urea, subsequently coated with a layer of sulfur and thereafter a further coating of polymer. Preferably, the polymer coatings are formed by the direct in situ co-polymerization of the components of the polymer on the fertilizer and on the sulfur coating. The compositions provide positive controlled release characteristics, are abrasion and impact resistant and are substantially more economical to produce than polymer coated fertilizers.

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