EP1613154A2 - Festes schädlingsbekämpfungssystem - Google Patents

Festes schädlingsbekämpfungssystem

Info

Publication number
EP1613154A2
EP1613154A2 EP04758580A EP04758580A EP1613154A2 EP 1613154 A2 EP1613154 A2 EP 1613154A2 EP 04758580 A EP04758580 A EP 04758580A EP 04758580 A EP04758580 A EP 04758580A EP 1613154 A2 EP1613154 A2 EP 1613154A2
Authority
EP
European Patent Office
Prior art keywords
copolymer
fatty acid
active agent
formulation according
polymeric formulation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04758580A
Other languages
English (en)
French (fr)
Other versions
EP1613154A4 (de
Inventor
designation of the inventor has not yet been filed The
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sergeants Pet Care Products LLC
Original Assignee
Sergeants Pet Care Products LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sergeants Pet Care Products LLC filed Critical Sergeants Pet Care Products LLC
Priority claimed from PCT/US2004/009892 external-priority patent/WO2004086862A2/en
Publication of EP1613154A2 publication Critical patent/EP1613154A2/de
Publication of EP1613154A4 publication Critical patent/EP1613154A4/de
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
    • A01N25/10—Macromolecular compounds

Definitions

  • the present invention is directed to a pest control system comprising a low melting point polymer or copolymer, high levels of a solid fatty acid, and active compounds to produce a solid slow release generator of the active compounds.
  • stearic acid is used in polymers as a process lubricant and an anti-block agent because of this property.
  • the compound becomes very difficult or impossible to process on conventional equipment such as an extruder or injection molding machine. This is due to the vast differences in melting points of stearic acid and the polymers plus the incompatibility between the two materials.
  • the stearic acid lubricates to the extent that the compound simply turns in the barrel of the extruder or molding machine. If a low melt polymer conventional pellet is used, the same incompatibility is demonstrated when higher levels (above about 2%) of stearic acid is used.
  • the present invention is directed to a pest control system comprising a pest control formulation comprising a low melting polymer or copolymer (that is, a polymer or copolymer having a melt temperature of below 250°F (121 °C), preferably below 200°F (93°C)), high levels of a solid fatty acid, and one or more active agents to produce a solid slow release generator of the active agents.
  • a pest control formulation comprising a low melting polymer or copolymer (that is, a polymer or copolymer having a melt temperature of below 250°F (121 °C), preferably below 200°F (93°C)), high levels of a solid fatty acid, and one or more active agents to produce a solid slow release generator of the active agents.
  • High levels of a solid fatty acid is defined as from about 5 wt% to about 50 wt%, preferably from about 15 wt% to about 30 wt%, of the total formulation.
  • the system is useful for making articles such as animal collars, ear tags, pest strips or blocks, and the like, for releasing the active agent from the article over an extended or prolonged period of time.
  • An "extended or prolonged period of time” is defined as a period of activity longer than the period of activity exhibited by the raw active ingredient alone.
  • the present invention is further directed to a method for preparing a polymeric pest control system comprising high levels of a solid fatty acid, the method comprising combining an active agent with from about 5 wt% to about 50 wt% of the solid fatty acid, heating the combination to a liquid state, and then adding the combination to granules of small irregularly shaped particles of, or powder of a low melting polymer or copolymer to make a dry blend.
  • This dry blend may then be processed into a shape on a conventional extruder or molding machine at low temperatures.
  • the resulting active agent generator is formed by extrusion or molding the mix into any desired shape such as a flea and tick collar for animals, a film covering for preventing bacteria or fungal growth on beds, etc.
  • fatty acid or “solid fatty acid” useful in the present invention is any fatty acid of from about 16 to about 36 carbon atoms which is a solid at room temperature.
  • fatty acids include, but are not limited to, stearic, palmitic, margaric , nonadecanoic, arachidic, heneicosanoic, dehenic, tricosanoic, tetracosanoic, pentacosanoic, cerotic fatty acids and mixtures thereof.
  • the solid fatty acid is present in the formulation of the invention in an amount of from about 5 wt% to about 50 wt%, preferably from about 15 wt% to about 30 wt%.
  • the "low melting polymer or copolymer” is selected from those polymers or copolymers having a melt temperature of below 250°F (121°C), preferably below 200°F (93°C).
  • Examples of polymers and copolymers useful in the present invention include, but are not limited to, polyethylene, polyvinyl acetate, polyethylene, ethylene acid copolymers, ethylene-vinyl acetate copolymers, ethylene acrylates, polyurethanes, styrene-butadiene, polyvinyl acetate, polyvinyl butyral, and mixtures and copolymers thereof.
  • the polymer or copolymer is used, partially or wholly, in the form of granules, small irregularly shaped particles or powder.
  • Conventional pellets of polymers are very difficult to work with in this invention and can only constitute a small percentage (no greater than about 15 wt% and preferably below about 10 wt%) of the total amount of polymer or copolymer, if they are used at all.
  • the low melting polymer or copolymer is present in the formulation of the invention in an amount of from about 40 wt% to about 80 wt%, preferably from about 50 wt% to about 70 wt%, of which at least about 40 wt% is in the form of granules, small irregularly shaped particles or powder.
  • the pest control active agent may be an insecticide, bactericide, fungicide, acaricide, attractant, repellent, any other biologically active ingredient that is compatible with the other components of the pest control system and mixtures thereof.
  • the active agent is chosen from any active agent known to be useful in the control of insect or acarid pests.
  • Exemplary pesticides and repellents which are effective against horn flies, face flies, stable flies, house flies, mosquitoes, lice, ticks, and mites are bioresmethrin, permethrin, tetramethrin, cypermethrin, decamethrin, pyrethrins, resmethrin, cyhalothrin, allethrin, dichlorvos, carbar l, naled, citrus oils, citronella oil, pine oil, stirofos, fenvalerate, stabilene, benzyl benzoate, methyl nonyl ketone, N-butylacetanilide, di-n-propyl isocinchomeronate, 2-octylthioethanol, dimethyl carbate, dimethyl phthalate, N,N- diethyl-m-toluamide, and 2,3:4,5-bis (2-butylene)-t
  • synergists include piperonyl butoxide and N-octyl bicycloheptene dicarboximide.
  • the active agent may be a liquid or a solid at room temperature.
  • the pest control active agent and the solid fatty acid are mixed together at a predetermined ratio, with the proviso that the fatty acid is present at a high level.
  • the amount of fatty acid in the formulation should be at least about 5 wt%, preferably at least about 15 wt%.
  • the active agent/fatty acid mixture is then heated to a liquid state and added to granules of, small irregularly shaped particles of, or powder form of a low melting polymer or copolymer to make a dry blend.
  • This dry blend formulation may then be processed into a shaped article, such as a pet collar or an ear tag or the like, on a conventional extruder or molding machine at low temperatures (that is, at temperatures that will melt the low melting polymer or copolymer, which is generally below about 250° F (121 °C)) by methods known in the art.
  • the article should be cooled to room temperature as quickly as possible. In some cases when the article is not quickly cooled, there is excessive bloom on the surface, which can flake off. When this happens, the article can be annealed at 140°F (60°C) as a post operation to prevent the excessive bloom. (60°C)
  • Additional components may optionally be included in the pest control system of the invention.
  • Such optional ingredients can include, but are not limited to, plasticizers, synergists, fragrances, coloring agents, preservatives, antioxidants, light stabilizers, and the like.
  • the active agent After being processed into the desired shape, the active agent will, together with the solid fatty acid, bloom to the surface of the article, making the active agent available to an environment, such as an animal for example, for pest control purposes, such as, for example, the control of insects and/or acarids on the animal.
  • the fatty acid / active agent combination blooms to the surface and stops until a part of the surface material is removed. When the surface material is removed, it is replaced by more of the combination of the fatty acid / active agent from the inter-matrix of the plastic.
  • Table 1 The formulation in Table 1 is prepared, and is then formed into an insecticidal dog collar, as follows:
  • Microthene ® Polymer MU 760-00 ethylene-vinyl acetate copolymer, ground powder, melt index: 32 (EMI), particle size: 35 mesh) - Equistar Chemicals, LP. Colorant - Day Glow Color Corp
  • the Gokilaht, safflower oil and stearic acid are weighed together. Heat is applied and the mixture brought to a liquid state at 165 °F (74°C). 2. The polymer is weighed and placed into a mixing vessel.
  • liquid active agent/stearic acid mixture is slowly added to the polymer while mixing.
  • the blend is then extruded or molded into the shape desired, which, in this Example was a dog collar.
  • the dogs were infested with fleas (Ctenocephales felis) and ticks (Rhipicephalus sanguineus) on the day before treatment and then re-infested weekly thereafter, each re-infestation to be made approximately 24 hours before the first of the next series of flea and tick counts.
  • Flea and tick timed finger counts were performed at 24 and 48 hours after treatment and at 24 hours after each re-infestation.
  • Comb counts, by removing and discarding all fleas and ticks, were performed at 72 hours after treatment and after each re-infestation.
  • EXAMPLE 2 The formulation in Table 2 is prepared, following the procedures of Example 1 :
  • Nylar ® comprises approximately 50% by weight pyriproxyfen and approximately 50% by weight corn oil and is available from MGK Company.
  • the material of the above formulation was subjected to a weigh loss test to ascertain if the non-polymer materials would release from the polymer matrix.
  • the test consisted of extruding the material into dog collars, weighing the collars, wiping the surface of the collars with a clean paper towel and reweighing. The weight difference from each wiping demonstrates the weight loss as it might happen in actual use.
  • a commercial cat pest control collar was similarly tested, as a comparison. While the weight loss of the collar of this invention was lower overall than that of the commercial collar, it followed the same profile of continuous loss over the course of the 25-day study. Also, while it was impossible in this study to ascertain the percent of active agents being released by the wipe test, visual observations show that the released material was a mixture of the oil phase materials and stearic acid.
  • EXAMPLE 4 The formulation in Table 4 is prepared, and is then formed into an insecticidal dog collar, as follows:
  • Elvax ethylene-vinyl acetate copolymer; conventional pellets
  • the Gokilaht, phosflex, stearic acid and Nylar are weighed and added to a heatable mixing vessel. The materials are heated to 165 °F (74°C) and mixed until a honogenous solution is achieved.
  • the MU 760-00 and the Elvax 150 polymers are weighed, placed into a mixing vessel and blended to uniformity.
  • the liquids should be applied to the polymer powder while the polymers are being mixed, so as not to cause large lumps to form. This should be done far enough in advance of extrusion (generally about 24 hours is sufficient) so that the liquids can solidify and a free-flowing powder is achieved.
  • the resulting formulation was extruded into dog collars.
  • the Extrusion Profile is:

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Agronomy & Crop Science (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
EP04758580A 2003-03-28 2004-03-29 Festes schädlingsbekämpfungssystem Withdrawn EP1613154A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US45868203P 2003-03-28 2003-03-28
PCT/US2004/009892 WO2004086862A2 (en) 2003-03-28 2004-03-29 Solid pest control system

Publications (2)

Publication Number Publication Date
EP1613154A2 true EP1613154A2 (de) 2006-01-11
EP1613154A4 EP1613154A4 (de) 2011-07-27

Family

ID=35464382

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04758580A Withdrawn EP1613154A4 (de) 2003-03-28 2004-03-29 Festes schädlingsbekämpfungssystem

Country Status (3)

Country Link
EP (1) EP1613154A4 (de)
TW (1) TW200500006A (de)
ZA (1) ZA200508707B (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1480125A (en) * 1974-02-07 1977-07-20 Dow Chemical Co Method of incorporating low-melting pesticidal materials into solid polymers
US4544547A (en) * 1980-10-22 1985-10-01 Bayer Aktiengesellschaft Ectoparasiticide-containing polyurethanes
FR2649584A1 (fr) * 1989-07-12 1991-01-18 Arrigoni Patrice Nouveau procede de production de dispositifs adaptes a la protection des animaux domestiques et dispositif ainsi realise
EP0763325A1 (de) * 1995-07-10 1997-03-19 Sumitomo Chemical Company, Limited Harzzusammensetzung und daraus hergestellte Formkörper

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1480125A (en) * 1974-02-07 1977-07-20 Dow Chemical Co Method of incorporating low-melting pesticidal materials into solid polymers
US4544547A (en) * 1980-10-22 1985-10-01 Bayer Aktiengesellschaft Ectoparasiticide-containing polyurethanes
FR2649584A1 (fr) * 1989-07-12 1991-01-18 Arrigoni Patrice Nouveau procede de production de dispositifs adaptes a la protection des animaux domestiques et dispositif ainsi realise
EP0763325A1 (de) * 1995-07-10 1997-03-19 Sumitomo Chemical Company, Limited Harzzusammensetzung und daraus hergestellte Formkörper

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2004086862A2 *

Also Published As

Publication number Publication date
EP1613154A4 (de) 2011-07-27
TW200500006A (en) 2005-01-01
ZA200508707B (en) 2006-11-29

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