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US 9,801,377 B2Granted
Formulations of clomazone
AssigneeFMC Corporation
InventorsHong Liu, Michael R. Welch, Paul Nicholson, Jeffrey A. Cook, Catherine Ranin, Sandra L. Shinn, Robert F. Pepper
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Abstract
New formulations of clomazone are provided, as well as new methods for making formulations of clomazone. The new formulations provide improved efficacy, decreased volatility, and/or increased loading of clomazone over the clomazone formulations in the prior art.
Claims15
A formulation comprising multilayered particles comprising:
- a core comprising clomazone,
- a first encapsulating layer surrounding the core and comprising polyurea, and
- a second encapsulating layer surrounding the first encapsulating layer and comprising polyvinyl alcohol,
- wherein the weight ratio of the polyvinyl alcohol to clomazone is from 1:6 to 1:4, the weight ratio of polyurea to polyvinyl alcohol is from 1.5:1 to 1:1.5, and further wherein the multilayered particles contain at least 50% by weight of ciomazone.
1 more element
A method for preparing an herbicidal composition comprising the steps of:
- a) preparing an aqueous suspension of particles comprising a core and a first encapsulating layer, wherein the core comprises clornazone and the first encapsulating layer comprises polyurea;
- b) adding a polyvinyl alcohol to the aqueous suspension;
- and
- c) spray drying the resulting mixture;
- wherein the weight ratio of the polyvinyl alcohol to clomazone is from 1:6 to 1:4, the weight ratio of polyurea to polyvinyl alcohol is from 1.5:1 to 1:1.5, and further wherein the multilayered particles contain at least 50% by weight of clomazone.
2 more elements
A method for making water-dispersible granules for delivering agricultural chemicals to a crop comprising the steps of:
- forming a water-dispersible powder containing at least one agriculturally active ingredient;
- milling the water-dispersible powder;
- and
- forming water-dispersible granules by combining the water-dispersible powder with a clomazone composition, wherein the clomazone composition comprises multilayered clomazone containing particles suspended in an aqueous solution, said multilayered clomazone containing particles comprising:
- a core comprising clomazone,
- a first encapsulating layer surrounding the core and comprising polyurea, and a second encapsulating layer surrounding the first encapsulating layer and comprising polyvinyl alcohol,
- wherein the weight ratio of the polyvinyl alcohol to clomazone is from 1:6 to 1:4, the weight ratio of polyurea to polyvinyl alcohol is from 1.5:1 to 1:1.5, and further wherein the multilayered particles contain at least 50% by weight of clomazone;
- wherein the granules exhibit controlled volatility.
5 more elements
Dependencies are inferred from the claim text.