Biodegradable solid preparation of a phytopathologicalagent with delayed active substance release

• US 20040259736A1
• Filed: 03/23/2004
• Published: 12/23/2004
• Est. Priority Date: 09/28/2001
• Status: Abandoned Application

• Current Assignee: BASF AG (BASF SE)
• Original Assignee: BASF AG (BASF SE)
• Inventors: Schneider, Karl-Heinrich, Dietsche, Frank, Kessler, Thomas, Heilmann, Karl-Otto, Dieing, Reinhold, Gomez, Marcos, Schillo, Simone
• Application Number:
  US10/490,368
• Publication Number:
  US 20040259736A1
• Time in Patent Office: Days
• US Class Current: 504/360
• CPC Class Codes: A01N 2300/00 Combinations or mixtures of active ingredients covered by classes A01N27/00 - A01N65/48 with other active or formulation relevant ingredients, e.g. specific carrier materials or surfactants, covered by classes A01N25/00 - A01N65/48
• CPC Class Codes: A01N 25/10 Macromolecular compounds
• CPC Class Codes: A01N 25/12 Powders or granules A01N25/26 takes precedence
• CPC Class Codes: A01N 37/50 the nitrogen atom being doubly bound to the carbon skeleton
• 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

Abstract

The present invention relates to a method for the preparation of a solid formulation of a slow-release crop protection product, which comprises carrying out a melt extrusion of a composition comprising 0.1 to 80% by weight of at least one fungicidal active ingredient, 0 to 80% by weight of at least one herbicidal, acaricidal, insecticidal or growth-regulatory active ingredient, 3 to 80% by weight of a thermoplastic, water-insoluble polymer from the group of the polylactides, 0 to 80% by weight of at least one thermoplastic water-insoluble polymer, 10 to 80% by weight of at least one mineral filler and 0 to 20% by weight of inorganic or organic additives, and subsequently shaping the extrudate, and to the solid formulations preparable by this method.

Claims

1. A method for the preparation of a solid formulation of a slow-release crop protection product, which comprises carrying out a melt extrusion of a composition comprising

(a) 0.1 to 80% by weight of at least one fungicidal active ingredient;

(b) 0 to 80% by weight of at least one herbicidal, acaricidal, insecticidal or growth-regulatory active ingredient;

(c) 3 to 80% by weight of a thermoplastic, water-insoluble polymer from the group of the polylactides;

(d) 5 to 80% by weight of at least one polybutylene adipate terephthalate;

(e) 10 to 80% by weight of at least one mineral filler; and

(f) 0 to 20% by weight of inorganic or organic additives;

the total of components (a) to (f) being 100%, and subsequently shaping the extrudate.

2. A method as claimed in claim 1, wherein the composition comprises 5 to 6% by weight of component (d).

3. A method as claimed in claim 1 wherein a fungicidal active ingredient selected from the group consisting of pyroquilon, tricyclazol, isoprothiolane, edifenphos, ferimzone, fludioxinil, pencycuron, flutolanil, mepronil, thifluzamid, iprodione, furametpyr and/or from the class of the strobilurins is used as component (a).

4. A method as claimed in claim 3, wherein a strobilurin of the formula I

5. A method as claimed in claim 4, wherein the strobilurin is of the formula Ia

6. A method as claimed in claim 4, wherein the strobilurin is of the formula Ib

7. A method as claimed in claim 1, wherein a pesticidal active ingredient selected from the group consisting of imidacloprid, acetamiprid, nitenpyram, fipronil, carbofuran, carbosulfan, benfuracarb, thiacloprid, fludioxonil, tefuranitde, thiamethoxam,

(E)-1-(2-chlorothiazol-5-ylmethyl)-3-methyl-2-nitroguanidine and terafuranitdine is used as component (b).

8. A method as claimed in claim 1, wherein calcium carbonate, magnesium silicate or calcium sulfate is used as component (e).

9. A method for the preparation of a solid formulation of a crop protection product as claimed in claim 1, which comprises melting components (a), (b), (c), (d), (e) and (f) in an extruder to give a plastic mixture and subsequently comminuting the melt by extrusion granulation.

10. A solid formulation of a crop protection product prepared as claimed in claim 1.

11. A method of controlling phytopathogenic fungi, undesired plant growth, undesired attack by insects or mites and/or for regulating the growth of plants, which comprises allowing a formulation of a crop protection product as claimed in claim 10 in solid form to act on plants, their environment or on seed.

12. A method for controlling phytopathogenic fungi, undesired plant growth, undesired attack by insects or mites and/or for regulating the growth of plants wherein a solid formulation of a crop protection product as claimed in claim 10 is applied, in the form of spreadable granules, to soils which are permanently or temporarily flooded.