Controlled-Release Agricultural Chemical Formulation

• US 20070224233A1
• Filed: 08/05/2005
• Published: 09/27/2007
• Est. Priority Date: 08/05/2005
• Status: Abandoned Application

• Current Assignee: Nippon Soda Company Limited
• Original Assignee: Nippon Soda Company Limited
• Inventors: Endo, Yoshihisa, Enomoto, Yoshihiro, Maekawa, Yuichi
• Application Number:
  US11/573,112
• Publication Number:
  US 20070224233A1
• Time in Patent Office: Days
• US Class Current: 424/409
• CPC Class Codes: A01N 25/08 containing solids as carriers or diluents
• CPC Class Codes: A01N 25/10 Macromolecular compounds
• CPC Class Codes: A01N 25/30 characterised by the surfactants
• CPC Class Codes: A01N 43/40 six-membered rings
• CPC Class Codes: A01N 47/40 the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides
• CPC Class Codes: A01N 51/00 Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds having the sequences of atoms O—N—S, X—O—S, N—N—S, O—N—N or O-halogen, regardless of the number of bonds each atom has and with no atom of these sequences forming part of a heterocyclic ring
• CPC Class Codes: A01N 53/00 Biocides, pest repellants or attractants, or plant growth regulators containing cyclopropane carboxylic acids or derivatives thereof

Abstract

An object of the present invention is to provide an agricultural chemical formulation which is able to control release of an agricultural chemical active ingredient. This agricultural chemical formulation includes a composition, containing an agricultural chemical active ingredient, styrene-maleic anhydride copolymer or mixture of styrene-maleic anhydride copolymer and polymer having repeating units derived from rosin or derivative thereof or salicylic acid or derivative thereof, and a release controller (a water-soluble polymer, a hydrophobically-treated silicon oxide, or a surfactant), forming a compatible state or matrix.

Claims

1. An agricultural chemical-containing resin composition comprising:

an agricultural chemical active ingredient, a styrene-maleic anhydride copolymer or styrene-maleic anhydride copolymer-resin mixture, and a release controller, the composition forming a compatible state or matrix.

2. An agricultural chemical-containing resin composition according to claim 1, wherein the styrene-maleic anhydride copolymer-resin mixture comprises:

a styrene-maleic anhydride copolymer resin; and

a rosin or derivative thereof, or a copolymer having repeating units derived from salicylic acid or derivative thereof.

3. An agricultural chemical-containing resin composition according to claim 1, wherein the release controller is a water-soluble polymer, silicon oxide or surfactant.

4. An agricultural chemical-containing resin composition according to claim 3, wherein the silicon oxide is hydrophobic white carbon.

5. An agricultural chemical-containing resin composition according to claim 1, wherein the agricultural chemical active ingredient is an ingredient for which the solubility in water at 25°

C. is 100 ppm or more.

6. An agricultural chemical-containing resin composition according to claim 1, wherein the agricultural chemical active ingredient is a neonicotinoid-based compound.

7. An agricultural chemical-containing resin composition according to claim 6, wherein the neonicotinoid-based compound is selected from the group consisting of nitenpyram, imidacloprid, acetamiprid, thiamethoxam, clothianidin, thiacloprid, dinotefuran and mixtures thereof.

8. An agricultural chemical-containing resin composition according to claim 1, wherein the mean particle size of the composition is 200 μ

m or less.

9. An agricultural chemical-containing resin composition according to claim 8, wherein the mean particle size of the composition is within the range of 1 to 100 μ

m.

10. A production process of preparing an agricultural chemical-containing resin composition according to claim 1, comprising a step of:

mixing, melting by heating, kneading, and cooling the agricultural chemical active ingredient, the styrene-maleic anhydride copolymer or styrene-maleic anhydride copolymer-resin mixture, and the release controller.

11. A process of preparing an agricultural chemical-containing resin composition according to claim 1, comprising the steps of

one of dissolving, dispersing, or mixing in an organic solvent the agricultural chemical active ingredient, the styrene-maleic anhydride copolymer or styrene-maleic anhydride copolymer-resin mixture, and a the release controller;

and

distilling off the organic solvent.

12. A process of preparing an agricultural chemical-containing resin composition according to claim 1, comprising

dissolving the styrene-maleic anhydride copolymer or styrene-maleic anhydride copolymer-resin mixture in an alkali aqueous solution;

adding the agricultural chemical active ingredient and a the release controller to the alkali aqueous solution;

acidifying the resulting solution to yield a precipitate; and

filtering and drying the precipitate.

13. An agricultural chemical formulation comprising an agricultural chemical-containing resin composition according to any one of claims 1 to 9.

24. An agricultural chemical-containing formulation comprising:

at least one agricultural chemical-containing resin composition according to any one of claims 1 to 9, or at least one second agricultural chemical active ingredient other than the agricultural chemical active ingredient contained in the agricultural chemical-containing resin composition, wherein the formulation is a pharmaceutical, veterinary medicine, food preservative or biocide agent.

25. An agricultural chemical-containing formulation according to claim 24, wherein the formulation is selected from the group consisting of soil pest extermination agents, termite extermination agents, clothing agents, pest insect extermination agents, wood pest insect extermination agents, bait agents, animal external parasite extermination agents, sanitary pest insect extermination agents, home disinfectants, marine vessel bottom coatings, fishing net and other algae prevention agents, and wood and other mildew-proofing agents.

26. An agricultural chemical-containing formulation according to claim 24, wherein the second agricultural chemical active ingredient other than the agricultural chemical active ingredient contained in the agricultural chemical-containing resin composition according to any one of claims 1 to 9 is a pyrethroid.

14. An agricultural chemical formulation comprising at least one agricultural chemical-containing resin composition containing an agricultural chemical active ingredient, a styrene-maleic anhydride copolymer or styrene-maleic anhydride copolymer-resin mixture, and a release controller, the composition forming a compatible state or matrix, said at least one agricultural chemical-containing resin composition having a mean particle size of 200 μ

m or less, and said formulation is used as a seed treatment agent, soil treatment agent or stem and leaf treatment agent.

15. An agricultural chemical formulation according to claim 14, wherein the mean particle size of the at least one agricultural chemical-containing resin composition is within the range of 1 to 100 μ

m.

16. An agricultural chemical formulation according to claim 14, wherein the agricultural chemical active ingredient is an ingredient for which the solubility in water at 25°

C. is 100 ppm or more.

17. An agricultural chemical formulation according to claim 14, wherein the agricultural chemical active ingredient is a neonicotinoid-based compound.

18. An agricultural chemical formulation according to claim 17, wherein the neonicotinoid-based compound is selected from the group consisting of nitenpyram, imidacloprid, acetamiprid, thiamethoxam, clothianidin, thiacloprid, dinotefuran and mixtures thereof.

19. An agricultural chemical formulation according to any one of claims 14 to 18, further comprising at least one second agricultural chemical active ingredient other than the agricultural chemical active ingredient contained in the agricultural chemical-containing resin composition.

20. An agricultural chemical formulation according to claim 19, wherein the second agricultural chemical active ingredient other than the agricultural chemical active ingredient contained in the agricultural chemical-containing resin composition is a pyrethroid.

21. A treatment method comprising treating with a composition containing at least one of the agricultural chemical formulation according to any one of claims 14 to 18 and at least one second agricultural chemical active ingredient other than the agricultural chemical active ingredient contained in the agricultural chemical-containing resin composition, either simultaneously or at different times.

22. A treatment method according to claim 21, wherein the second agricultural chemical active ingredient other than the agricultural chemical active ingredient contained in the agricultural chemical-containing resin composition is a pyrethroid.

23. A plant seed treated using a treatment method according to claim 21.