Method of controlling the release of agricultural active ingredients from treated plant seeds
AssigneeStepan Company
InventorsYiwei Ding, Jawed Asrar
Life of this patent
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Abstract
A method of controlling the release rate of an agricultural active ingredient from a seed that has been treated with that active includes providing a seed that has been treated with the active ingredient, applying to the treated seed a film that includes an emulsion of a polymer in a liquid in which both the agricultural active ingredient and the polymer have low levels of solubility, and then curing the film to form a water insoluble polymer coating on the surface of the treated seed. Seeds that have been treated by this method are also provided.
Claims9
A method of controlling the release rate of an agricultural active ingredient from a seed treated with the active ingredient, the method comprising the steps of:
- providing a seed that has been treated with an agricultural active ingredient;
- applying to the treated seed, at a temperature of about 34° F. (about 1° C.), an aqueous emulsion of a polymer latex, wherein the polymer latex has a solubility in water at 25° C. of less than 5% by weight, a glass transition temperature of about 15° C. to about 40° C. and wherein the active ingredient has a solubility in water at 20° C. of less than 10 g/L;
- and
- curing the polymer latex emulsion to form a water insoluble, non-migrating polymer coating on the surface of the treated seed, wherein the polymer coating that is formed from the polymer latex emulsion has a glass transition temperature within the range of from about 15° C. to about 40° C., thereby providing a coating which retards the release rate of the agricultural active ingredient from the seed.
Dependencies are inferred from the claim text.