Sulfur coated fertilizers with improved abrasion resistance

Details Sulfur coated fertilizers with improved abrasion resistance Sulfur coated fertilizers with improved abrasion resistance

1998-01-16

1999-11-16

Straub, Gary P.

Chemistry: fertilizers

Processes and products

Organic material-containing

71 6402, 71 6407, 71 6412, 71 6411, 71 6413, 427212, 427213, C05C 900, A01N 2500, B05D 700

Patent

active

059849940

ABSTRACT:
Sealant compositions for sulfur coated fertilizer particles are mixtures of wax materials and additives which provide improved moisture barrier properties and abrasion resistance. The sealants have penetration values measured by ASTM D-1321 of at least 20 at 25.degree. C., and congealing points measured by ASTM D-938 of between about 50.degree. C. and about 100.degree. C. The sealed fertilizer particles are conditioned with particulate materials with a surface area of at least about 2 m.sup.2 /g and an oil absorption of at least about 100%. A method for the production of abrasion resistant sulfur coated fertilizers is also disclosed.

REFERENCES:
patent: 5137563 (1992-08-01), Valkanas
patent: 5176734 (1993-01-01), Fujita et al.
patent: 5225278 (1993-07-01), Kielbania, Jr. et al.
patent: 5300135 (1994-04-01), Hudson et al.
patent: 5599374 (1997-02-01), Detrick
patent: 5603745 (1997-02-01), Pettersen et al.

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