Use of surface-reacted calcium carbonate as carrier for agrochemical compounds

Patent metadata

Field	Value
Publication number	US-10292383-B2
Application number	US-201615541825-A
Country	US
Kind code	B2
Filing date	Jan 13, 2016
Priority date	Jan 15, 2015
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

The present invention relates to the use of surface-reacted calcium carbonate-containing minerals and/or surface-reacted precipitated calcium carbonates as solid particulate carriers to enhance the efficacy of agrochemical compounds loaded onto of said carriers.

First claim

The invention claimed is:

1. A composition comprising:
(a) a particulate solid carrier comprising a surface-reacted calcium carbonate that is a reaction product of calcium carbonate in an aqueous medium with carbon dioxide and at least one water soluble strong acid or medium strong acid, wherein the carbon dioxide is formed in situ and/or supplied from an external source; and
(b) at least one agrochemical compound loaded onto the particulate solid carrier;
wherein the at least one agrochemical compound is a fungicide selected from the group consisting of benalaxyl, kiralaxyl, furalaxyl, metalaxyl, mefenoxam, oxadixyl, ofurace, dimethomorph, flumorph, pyrimorph, benthiavalicarb, iprovalicarb, valifenalate, and mandipropamid.

2. The composition according to claim 1 , wherein the composition further comprises a copper source that is optionally loaded onto the particulate solid carrier.

3. The composition according to claim 2 , wherein the copper source is tribasic copper sulfate or tribasic copper chloride.

4. The composition according to claim 1 , wherein the agrochemical compound is dimethomorph.

5. The composition according to claim 1 , wherein the particulate solid carrier and the agrochemical compound are present in the composition at a weight ratio of from 1,000:1 to 1:1.

6. The composition according to claim 1 , wherein the particulate solid carrier and the agrochemical compound are present in the composition at a weight ratio of from 500:1 to 2:1.

7. The composition according to claim 1 , wherein the particulate solid carrier and the agrochemical compound are present in the composition at a weight ratio of from 200:1 to 3:1.

8. The composition according to claim 1 , wherein the calcium carbonate is a calcium carbonate-containing mineral selected from the group consisting of marble, chalk, dolomite, limestone, and an any mixture thereof; and/or a precipitated calcium carbonate having one or more of an aragonitic, vateritic and calcitic crystal form.

9. The composition according to claim 1 , wherein the particulate solid carrier has a d 50 of from 2 to 50 μm.

10. The composition according to claim 1 , wherein the particulate solid carrier has a specific surface area of from 10 to 200 m 2 /g.

11. The composition according to claim 1 , wherein the particulate solid carrier has an intraparticle intruded specific pore volume within a range of 0.15 to 1.3 cm 3 /g, calculated from a mercury intrusion porosimetry measurement.

12. The composition according to claim 1 , wherein the surface-reaction calcium carbonate is a reaction product of a calcium carbonate-containing material selected from the group consisting of marble, chalk, dolomite, limestone, and any mixture thereof in an aqueous medium with carbon dioxide and with phosphoric acid, wherein the carbon dioxide is formed in situ, and wherein the agrochemical compound is dimethomorph.

13. A process for the preparation of the composition according to claim 1 comprising:
a) providing the particulate solid carrier comprising the surface-reacted calcium carbonate;
b) providing the at least one agrochemical compound; and
c) loading the at least one agrochemical compound on the particulate solid carrier comprising the at least one surface-reacted calcium carbonate.

14. The process according to claim 13 , wherein the surface-reaction calcium carbonate is a reaction product of a calcium carbonate-containing material selected from the group consisting of marble, chalk, dolomite, limestone, and any mixture thereof in an aqueous medium with carbon dioxide and with phosphoric acid, wherein the carbon dioxide is formed in situ, and wherein the agrochemical compound is dimethomorph.

15. A process for treating a plant with a fungicide comprising applying to the plant a composition comprising:
(a) a particulate solid carrier comprising a surface-reacted calcium carbonate that is a reaction product of calcium carbonate in an aqueous medium with carbon dioxide and at least one water soluble strong acid or medium strong acid, wherein the carbon dioxide is formed in situ and/or supplied from an external source; and
(b) at least one agrochemical compound loaded onto the particulate solid carrier;
wherein the at least one agrochemical compound is a fungicide selected from the group consisting of benalaxyl, kiralaxyl, furalaxyl, metalaxyl, mefenoxam, oxadixyl, ofurace, dimethomorph, flumorph, pyrimorph, benthiavalicarb, iprovalicarb, valifenalate, and mandipropamid.

16. The process according to claim 15 , wherein the surface-reaction calcium carbonate is a reaction product of a calcium carbonate-containing material selected from the group consisting of marble, chalk, dolomite, limestone, and any mixture thereof in an aqueous medium with carbon dioxide and with phosphoric acid, wherein the carbon dioxide is formed in situ, and wherein the agrochemical compound is dimethomorph.

17. The process according to claim 15 , wherein the composition is used to treat and/or prevent a fungus or fungus-like organism.

18. The process according to claim 17 , wherein the fungus or fungus-like organism is an oomycete.

19. The process according to claim 17 , wherein the fungus or fungus-like organism is Perenosporales.

20. The process according to claim 18 , wherein the fungus or fungus-like organism is Plasmopara viticola.

21. The process according to claim 15 , wherein the plant is selected from the group consisting of a potato plant, a tomato plant, a corn plant, a tobacco plant and a grapevine.

22. The process according to claim 15 , wherein the plant is a grapevine.

23. The process according to claim 15 , wherein the particulate solid carrier enhances efficacy of the agrochemical compound loaded onto the carrier.

24. The process according to claim 23 , wherein the efficacy is a PESSEV (pest severity) efficacy and/or a PESINC (pest incidence) efficacy.

Assignees

• Omya Int Ag

Inventors

• Schenker Michel
• Zocco Domenico
• Gane Patrick A C
• Schoelkopf Joachim

Classifications

• A01N25/08 Primary

  containing solids as carriers or diluents · CPC title

• A01N43/84

  six-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,4 · CPC title

• A01N59/20

  Copper · CPC title

• C01F11/185

  After-treatment, e.g. grinding, purification, conversion of crystal morphology · CPC title

• A01N37/38

  having at least one oxygen or sulfur atom attached to an aromatic ring system · CPC title