Cross-linked polyols for controlled release fertilizers
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United States of America Patent
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Aug 5, 2014
Grant Date -
May 10, 2012
app pub date -
Nov 8, 2011
filing date -
Nov 10, 2010
priority date (Note) -
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Abstract
A controlled release fertilizer material comprising a particulate plant nutrient surrounded by a coating including a mixture of a cross-linked polyol and an isocyanate, and optionally a wax, is described. In some embodiments, the cross-linked polyol can be cross-linked with sulfur, oxygen, and/or a peroxide cross-linking moiety. In one embodiment the cross-linked polyol is castor oil cross-linked with sulfur.
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International Classification(s)
- C01C:AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C05G:MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DI....
- A01N:PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLA....
- C05D:INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C....
- C08G:MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN B....
- C05C:NITROGENOUS FERTILISERS
- C07C:ACYCLIC OR CARBOCYCLIC COMPOUNDS
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