Stable capsule suspension of clomazone

1. A storage stable capsule suspension formulation comprising a herbicidally effective amount of clomazone encapsulated within a polymeric shell wall of microcapsules, said microcapsules characterized in comprising a stabilizing effective amount of epoxidized soybean oil.

2. The formulation as claimed in claim 1 , wherein said polymeric shell wall is formed by condensation of at least one wall forming component.

3. The formulation as claimed in claim 1 , wherein said polymeric shell wall is formed by self-condensation of a wall forming component.

4. The formulation as claimed in claim 1 , wherein said polymeric shell wall is formed by interfacial condensation of a first and a second wall forming components, each being included separately in at least two immiscible liquids.

5. The formulation as claimed in claim 4 , wherein said immiscible liquids are an organic phase and an aqueous phase.

6. The formulation as claimed in claim 5 , wherein epoxidized soybean oil is included within the organic phase.

7. The formulation as claimed in claim 5 , wherein said organic phase is dispersed in the aqueous phase.

8. The formulation as claimed in claim 7 , wherein the particle size of the dispersed organic phase is from about 0.1 microns to about 200 microns.

9. The formulation as claimed in claim 8 , wherein the polymeric shell wall material is polyurea.

10. The formulation as claimed in claim 5 , wherein epoxidized soybean oil comprises up to about 70% by weight of the organic phase.

11. The formulation as claimed in claim 5 wherein the polymeric shell wall constitutes from about 20% by weight to about 40% by weight of the organic phase.

12. The formulation as claimed in claim 1 additionally comprising at least one ingredient selected from a plasticizer, a tackifier, an antifoam, a rheology modifier, a density modifier; a neutralizing acid, a biocide and a film forming agent.

13. The formulation as claimed in claim 1 , wherein said polymeric shell wall material is selected from polyurea, polyurethane, polyamide, polycarbonate, polysulfonamide, urea formaldehyde, melamine resin, melamine urea resin, gelatin, gum arabic shell wall, crosslinked and non-crosslinked combinations thereof.

14. The formulation as claimed in claim 1 , wherein said formulation additionally comprises a surfactant selected from ethoxylated lignosulfonic acid salt, lignosulfonic acid salt, oxidized lignin, lignin salt, salt of styrene-maleic anhydride copolymer, polyvinyl alcohol, salt of partial esters of styrene-maleic anhydride copolymer, partial salt of polyacrylic acid and partial salt of polyacrylic acid terpolymers.

15. The formulation as claimed in claim 1 comprising from about 10% to about 50% of clomazone active ingredient.