Abstract

A controlled release fertilizer material comprising a particulate plant nutrient surrounded by a coating of a mixture including an isocyanate and a polyol, and further comprising a modified wax that may include a polyhydroxyl compound in which the wax and/or the polyhydroxyl compound are cross-linked with a sulfur or oxygen or a peroxide cross-linking moiety. In certain embodiments, the wax and polyhydroxyl compound are cross-linked at unsaturated sites in the wax or polyhydroxyl compound using heat, UV or ionizing radiation.

IPC Classes  ?

• C05C 9/00 - Fertilisers containing urea or urea compounds
• C05C 1/00 - Ammonium nitrate fertilisers
• C05C 5/02 - Fertilisers containing other nitrates containing sodium or potassium nitrate
• C05C 11/00 - Other nitrogenous fertilisers
• C05B 7/00 - Fertilisers based essentially on alkali or ammonium orthophosphates
• C05D 9/00 - Other inorganic fertilisers
• C05D 9/02 - Other inorganic fertilisers containing trace elements
• C05G 3/00 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity

Abstract

A controlled release fertilizer material comprising a particulate plant nutrient surrounded by a coating which is the reaction product of a mixture including a cross-linked polyol, an isocyanate and a wax is described. The cross-linked polyol is a reaction product of a polyhydroxyl compound, such as glycerol, and a triglyceride and the monoglyceride and/or diglyceride products are cross-linked with sulfur, oxygen and/or a peroxide cross-linking moiety, or are directly cross-linked at unsaturated sites in the monoglycerides and/or diglycerides.

IPC Classes  ?

• C05D 9/00 - Other inorganic fertilisers
• C05D 9/02 - Other inorganic fertilisers containing trace elements
• C01C 1/18 - Nitrates of ammonium
• A01N 25/00 - Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of applicationSubstances for reducing the noxious effect of the active ingredients to organisms other than pests
• C05G 3/00 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity
• C05C 9/00 - Fertilisers containing urea or urea compounds
• C08G 18/36 - Hydroxylated esters of higher fatty acids
• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
• C08G 75/04 - Polythioethers from mercapto compounds or metallic derivatives thereof
• C08G 75/26 - Polythioesters
• C08G 75/00 - Macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur, with or without nitrogen, oxygen, or carbon
• C07C 327/22 - Esters of monothiocarboxylic acids having carbon atoms of esterified thiocarboxyl groups bound to hydrogen atoms or to acyclic carbon atoms

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.

IPC Classes  ?

• C05D 9/00 - Other inorganic fertilisers
• C05D 9/02 - Other inorganic fertilisers containing trace elements
• C01C 1/18 - Nitrates of ammonium
• A01N 25/00 - Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of applicationSubstances for reducing the noxious effect of the active ingredients to organisms other than pests
• C05G 3/00 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity
• C05C 9/00 - Fertilisers containing urea or urea compounds
• C08G 18/36 - Hydroxylated esters of higher fatty acids
• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
• C08G 75/04 - Polythioethers from mercapto compounds or metallic derivatives thereof
• C08G 75/26 - Polythioesters
• C08G 75/00 - Macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur, with or without nitrogen, oxygen, or carbon
• C07C 327/22 - Esters of monothiocarboxylic acids having carbon atoms of esterified thiocarboxyl groups bound to hydrogen atoms or to acyclic carbon atoms