Method of making a composite material including a thermoplastic polymer, a pest food material and a pesticide

• US 9,861,097 B2
• Filed: 07/02/2015
• Issued: 01/09/2018
• Est. Priority Date: 12/21/2006
• Status: Active Grant

• Current Assignee: Corteva Agriscience LLC (Corteva, Inc.)
• Original Assignee: Dow Agrosciences LLC (Corteva, Inc.)
• Inventors: Hill, Robert L., King, James E., DeMark, Joseph J., Arnoldy, Anton, Tolley, Mike P., Williams, III, Donald E., Eger, Jr., Joseph E.
• Primary Examiner(s): Barham, Bethany
• Assistant Examiner(s): FRAZIER, BARBARA S
• Application Number:
  US14/790,676
• Publication Number:
  US 20150305325A1
• Time in Patent Office: 922 Days
• Field of Search: None
• CPC Class Codes: A01M 1/02 with devices or substances, e.g. food, pheronones attracting the insects
• CPC Class Codes: A01M 1/026 combined with devices for monitoring insect presence, e.g. termites bait stations A01M1/2005; detecting other animals in a given area A01M31/002
• CPC Class Codes: A01M 1/2011 for crawling insects
• CPC Class Codes: A01N 25/006 insecticidal
• CPC Class Codes: A01N 25/10 Macromolecular compounds
• CPC Class Codes: A01N 43/56 1,2-Diazoles; Hydrogenated 1,2-diazoles
• CPC Class Codes: A01N 45/02 having three carbocyclic rings
• CPC Class Codes: A01N 47/02 the carbon atom having no bond to a nitrogen atom
• CPC Class Codes: A01N 47/34 containing the groups , e.g. biuret; Thio analogues thereof; Urea-aldehyde condensation products

Abstract

Composite materials that are palatable to a wood-destroying pest species and also pesticidal to the pest species can be used in pest control devices and can be used as wood substitutes for structural components, which are resistant to destruction by wood-destroying pests. The composite materials include a thermoplastic polymer, a food material for the pest and a pesticide. The composite material is formed by mixing a thermoplastic polymer, wood fragments or other cellulosic materials and a quantity of pesticide, and thereafter creating a molten material within a mixer, compounder, extruder or the like. The molten material is extruded or molded to form the desired shape.

Claims

1. A method of making a bait that is palatable to termites, the method comprising:

extruding a mixture of (i) cellulose acetate butyrate, (ii) alpha cellulose, and (iii) noviflumuron to form a composite material in which the alpha cellulose and noviflumuron are contained within a plastic structural matrix, and

cooling the composite material to a temperature to form the bait.

2. The method of claim 1, further comprising adding a plasticizer to the mixture.

3. The method of claim 1, further comprising adding a lubricant to the mixture.

4. The method of claim 1, wherein extruding the mixture comprises feeding the mixture into a twin screw extruder.

5. The method of claim 1, wherein the composite material includes about 5% to about 50% by weight of the plastic structural matrix.

6. The method of claim 1, wherein the composite material includes about 50% to about 85% by weight of the alpha cellulose.

7. The method of claim 1, wherein the composite material includes less than 5% by weight of noviflumuron.

8. The method of claim 1, wherein the step of extruding has a processing temperature from about 130°

C. to about 180°

C.

9. The method of claim 1, wherein the step of extruding has a processing temperature from about 110°

C. to about 160°

C.