Stability of azadirachtin-containing solid
AssigneeThermo Trilogy Corporation
InventorsJames F. Walter, Michael T. Roland
Life of this patent
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Abstract
The stability of an azadirachtin-containing solid preparation is increased if the preparation contains about 5% or less volatile polar solvents and 1% or less water. Reduction of the percentage of volatile polar solvents present in preparations of azadirachtin-containing solids to such levels improves the storage-stability of the solids without significantly degrading the azadirachtin in the solid. Solvents are preferably removed by drying the preparation at a suitable temperature for a time sufficient to reduce the level of water and volatile polar solvents to acceptable levels.
Claims11
A solid biocontrol formulation comprising azadirachtin;
- one or more volatile polar solvents at a total concentration of no more than about five weight percent;
- and
- water at no more than 1%,
- wherein the biocontrol formulation is free-flowing after storage in a sealed container at 55.degree. C. for two weeks.
A method for forming a solid biocontrol formulation, the method comprising the steps of:
- reducing the volatile polar solvents in an azadirachtin-containing solid to about 5% by weight or less;
- and
- reducing the water in the azadirachtin-containing solid to about 1% or less.
Dependencies are inferred from the claim text.