Cross-linked polyols for controlled release fertilizers

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...

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Bibliographische Detailangaben
Hauptverfasser:	XING BAOZHONG, MARUVADA SRIRAKRISHNA, WYNNYK NICK PETER
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS AGRICULTURE AMMONIA ANIMAL HUSBANDRY BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES CHEMISTRY COMPOSITIONS BASED THEREON COMPOUNDS THEREOF CYANOGEN FERTILISERS FERTILISERS CHARACTERISED BY THEIR FORM FERTILISERS PRODUCING CARBON DIOXIDE FISHING FORESTRY HUMAN NECESSITIES HUNTING INORGANIC CHEMISTRY INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS MANUFACTURE THEREOF METALLURGY MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05 MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS NITROGENOUS FERTILISERS ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS PEST REPELLANTS OR ATTRACTANTS PLANT GROWTH REGULATORS PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF THEIR PREPARATION OR CHEMICAL WORKING-UP TRAPPING
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Beschreibung
Zusammenfassung:	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.