Fertilizer encapsulation using sulfur containing polyols

Details Fertilizer encapsulation using sulfur containing polyols Fertilizer encapsulation using sulfur containing polyols

C - Chemistry, Metallurgy

05

C

C05C 9/00 (2006.01) C05G 3/00 (2006.01) C05G 3/10 (2006.01) C08G 18/32 (2006.01) C08G 18/48 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2406412

This invention relates to fertilizer encapsulation with polyurethanes wherein the isocyanate-reactive composition contains sulfur. The process of the present invention comprises applying a polyisocyanate composition to fertilizer particles, applying an isocyanate-reactive composition which contains sulfur to the polyisocyanate coated fertilizer particles, or applying an isocyanate-reactive composition which contains sulfur to fertilizer particles and then applying a polyisocyanate composition to the isocyanate-reactive coated fertilizer particles, and repeating these steps as necessary to form sulfur containing polyurethane encapsulated fertilizer particles.

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