US6663686 Controlled release fertilizer and method for production thereof

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United States of America

Application Number 09604161

Application Date 27.06.2000

Publication Number 6663686

Publication Date 16.12.2003

Grant Number 6663686

Grant Date 16.12.2003

Publication Kind B1

IPC

CPC

Applicants Agrium, Inc.

Inventors Geiger, Albert J.
Stelmack, Eugene G.
Babiak, Nicolette M.

Agents Katten Muchin Zavis Rosenman

Priority Data 09604161 27.06.2000 US

Title

(EN) Controlled release fertilizer and method for production thereof

Abstract

(EN)

A controlled release fertilizer material comprising a particulate plant nutrient surrounded by a coating which is the reaction product of a mixture comprising: a polyol, an isocyanate and an organic wax.

C	CHEMISTRY; METALLURGY
08	ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G	MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
18	Polymeric products of isocyanates or isothiocyanates
06	with compounds having active hydrogen
28	characterised by the compounds used containing active hydrogen
30	Low-molecular-weight compounds
36	Hydroxylated esters of higher fatty acids

C	CHEMISTRY; METALLURGY
05	FERTILISERS; MANUFACTURE THEREOF
C	NITROGENOUS FERTILISERS
9	Fertilisers containing urea or urea compounds

C	CHEMISTRY; METALLURGY
05	FERTILISERS; MANUFACTURE THEREOF
G	MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C0595; MIXTURES OF ONE OR MORE FERTILISERS WITH ADDITIVES NOT HAVING A SPECIFIC FERTILISING ACTIVITY; FERTILISERS CHARACTERISED BY THEIR FORM
3	Mixtures of one or more fertilisers with additives not having a specifically fertilising activity

C	CHEMISTRY; METALLURGY
05	FERTILISERS; MANUFACTURE THEREOF
G	MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C0595; MIXTURES OF ONE OR MORE FERTILISERS WITH ADDITIVES NOT HAVING A SPECIFIC FERTILISING ACTIVITY; FERTILISERS CHARACTERISED BY THEIR FORM
5	Fertilisers characterised by their form

C	CHEMISTRY; METALLURGY
08	ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G	MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
18	Polymeric products of isocyanates or isothiocyanates

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1. US6663686 - Controlled release fertilizer and method for production thereof