WO2013113685A1 - Procédé permettant d'empêcher des insectes non-volants de se répandre - Google Patents

Procédé permettant d'empêcher des insectes non-volants de se répandre Download PDF

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Publication number
WO2013113685A1
WO2013113685A1 PCT/EP2013/051649 EP2013051649W WO2013113685A1 WO 2013113685 A1 WO2013113685 A1 WO 2013113685A1 EP 2013051649 W EP2013051649 W EP 2013051649W WO 2013113685 A1 WO2013113685 A1 WO 2013113685A1
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WO
WIPO (PCT)
Prior art keywords
silica
dispersion
insects
coated
particles
Prior art date
Application number
PCT/EP2013/051649
Other languages
German (de)
English (en)
Inventor
Joerg Peggau
Hans Henning Wenk
Jens Hildebrand
Harald Jakob
Christoph Neinhuis
Ralf Helbig
Original Assignee
Evonik Degussa Gmbh
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 Evonik Degussa Gmbh filed Critical Evonik Degussa Gmbh
Publication of WO2013113685A1 publication Critical patent/WO2013113685A1/fr

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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
    • A01N25/12—Powders or granules

Definitions

  • the subject of the invention is a method by which propagation of current insects can be prevented by coating an inclined solid surface with particles of amorphous silica, so that insects with their limbs on the surface no longer find any support and therefore no longer over the surface be able to walk.
  • insects have on their limbs holding and adhesion organs, with which they can hold on both rough and smooth surfaces and on such
  • insectsivorous pitcher plants Such surfaces of plants show a surface folded on a scale of a few micrometers, are coated with microcrystalline waxes or have a microstructured surface with an adherent water film (B. Prüm et al., JR Soc. Interface 9 (2012) 127-135, Online U. Bauer, W. Federle, Plant Signaling & Behavior 4 (2009) 1019-1023).
  • running on surfaces by insects and propagation of on-going insects over surfaces is undesirable and should be avoided. Examples are the spread of cockroaches over
  • Insects can therefore no longer amount to the surface if it is inclined.
  • Anodisk TM can achieve a much lower running force than on a smooth alumina surface.
  • US 2,818,340 describes killing insects by contacting them with powdered hydrophobic silica.
  • US 3,159,536 describes a method of killing
  • Silica In the examples, a wooden surface is dusted with a silicone oil-impregnated silica airgel. Insects such as termites, cockroaches, and mealworms that crawled through the sputtered material for 5 minutes were killed at 70% or more. The material adheres in large amounts on the body of the insects and leads to
  • EP 0 367 934 A1 describes the use of aqueous dispersions of pyrogenically prepared and hydrophobicized silica for controlling insects. The insects are sprayed with the dispersion or a tissue is soaked with the dispersion and between or on plants
  • dispersion is sprayed on the bottom of a Petri dish, dried and on
  • WO 94/09626 describes the use of dispersions of hydrophobicized silica, which additionally contain a finely divided hydrophilic solid.
  • the test for insecticidal activity is carried out as in EP 0 367 934 AI.
  • WO 2005/104851 describes aqueous insecticides
  • Dispersions containing 0.5 to 20 wt .-% hydrophobic silica, 0.01 to 10 wt .-% viscosity-increasing additive and 0.1 to 1 wt .-% preservative For testing, the dispersion is spread with a doctor blade in 200 ym layer thickness on a filter paper, dried, the
  • coated filter paper placed in a Petri dish and mites placed in the center of the treated surface.
  • the holding power of insect limbs on the surface can be greatly reduced and propagation of current insects by arranging an inclined smooth solid surface that is amorphous with particles Is coated with silica, in the propagation of the
  • the invention is therefore a method for
  • Particles of an amorphous silica is coated.
  • the invention also provides the use of a dispersion containing particles of an amorphous silica and a liquid dispersant, for reducing the holding power of insect limbs on a with the
  • Propagation path of insects an inclined smooth solid surface with particles of an amorphous silica
  • Insects such as Ants
  • flyable insects such as insects, such as Cockroaches and flies.
  • propagation of current insects according to the invention comprises both a spread in areas that can be reached by flightless running insects only by running over the propagation path, as well as an undesirable spread of flyable insects by running on a surface, which have reached the insects flying.
  • inclined surface refers to a surface whose normal is not directed against the direction of gravitational force.
  • the surface is at least 15 degrees, especially
  • the surface is at least 60 degrees, especially around
  • smooth surface refers to a surface that has no bumps
  • the average roughness R a of the uncoated surface is preferably at most 2.5 ⁇ m, particularly preferably at most 2.0 ⁇ m and in particular at most
  • Surface can consist of any solid material in the inventive method. Both polar materials, e.g. Glass, ceramics, concrete or paper, as well as non-polar materials, e.g.
  • Polyethylene, polypropylene, polycarbonates or Polymethylmethacrylate are also suitable.
  • metallic surfaces such as steel or aluminum, and painted surfaces. A hard surface is preferred
  • Table 1 shows typical Shore D hardnesses of plastic surfaces.
  • the surface is preferably coated in an average layer thickness in the range from 0.3 to 1000 ⁇ m, particularly preferably from 0.5 to 100 ⁇ m, with particles of a silica.
  • Layer thickness can be at a boundary between Coated and uncoated portions of the surface are determined by confocal microscopy.
  • the particles of amorphous silica preferably have particle sizes with a weight-related median of
  • Particle size distribution in the range of 50 to 800 nm, more preferably from 50 to 200 nm, on.
  • Particle size distribution can be determined by dynamic
  • Layer thickness selected so that it is greater by a factor of 3 to 100, in particular 10 to 50 than the weight-related median particle size distribution.
  • the layer thickness can reliably prevent the spread of insects even with small amounts of silica. With an appropriate choice of the median particle size distribution, the coating leads only to a slight change in the appearance of the
  • hydrophilic silicas and hydrophobic silicas can be used for the method according to the invention
  • the silicic acid is preferably a hydrophobized silica, particularly preferably a hydrophobized silica which has trialkylsilyl groups or dialkylsilyl groups covalently bonded to the surface.
  • Hydrophoblix silicic acids can be prepared by reacting silicic acids with organosilanes, silazanes or
  • Polysiloxanes are produced. suitable
  • Silicon compounds for the production of hydrophobicized Silicas are known from EP-A 0 722 992, page 3, line 9 to page 6, line 6. Particularly preferred
  • hydrophobicized silicic acids obtained by reacting a silica with a silicon compound of in
  • EP-A 0 722 992 in which the classes of compounds (a) to (e) and (k) to (m) have been prepared.
  • a hydrophobicized silica When a hydrophobicized silica is used, the effect according to the invention that the insects slip or fall off the surface is maintained over a longer period of time.
  • Both precipitated silicas and pyrogenic silicas can be used for the method according to the invention.
  • the silica is a fumed silica, more preferably a hydrophobized fumed silica.
  • Pyrogenic silicas are examples of the silica fumed silica, more preferably a hydrophobized fumed silica.
  • Silicas made by flame hydrolysis of a volatile silicon compound.
  • dendritic particles are formed in which primary particles of a size of less than 50 nm are sintered together. Suitable precipitated
  • Silicas are under the brand name Sipernat® of
  • Silicas are available under the brand name Aerosil® from Evonik Industries. Particularly suitable hydrophobized fumed silicas are the products Aerosil® R805, Aerosil® R974, Aerosil® R202, Aerosil® R812, Aerosil® R812S and Aerosil® R8200 from Evonik Industries. When using a hydrophobized fumed silica, the effect according to the invention that the insects of the
  • the particles of an amorphous silica and a liquid Contains dispersant used to maintain the holding power of insect limbs on a dispersion
  • the dispersion contains a hydrophobized silica, more preferably a hydrophobicized
  • the silica is preferably a fumed silica.
  • a hydrophobized silica in particular a hydrophobized fumed silica, the advantages already mentioned above are achieved.
  • Silica preferably has particle sizes with one
  • the particle size distribution can be determined by dynamic light scattering of the suspension diluted with 2-propanol at at least two wavelengths and evaluation according to the Mie theory, for example using a device LA-910 from Horiba.
  • Choice of the median particle size distribution can be achieved by forming a coating on the surface by applying the dispersion to a surface and evaporation of the dispersant on the surface, which changes the appearance of the coated surface only slightly. In the most preferred area for the median of
  • Particle size distribution can be obtained coatings that are barely visible to the naked eye, but still achieve the effect of the invention, the
  • Dispersion coated solid surface to reduce.
  • the dispersion used in the invention contains
  • amorphous silica in addition to an amorphous silica still a liquid dispersant.
  • a volatile organic compound e.g., benzyl alcohol
  • Dispersant or a mixture of two or more used volatile dispersants preferably contains from 0.1 to 25% by weight of silica and at least 70% by weight.
  • the dispersion contains from 0.1 to 25% by weight of silica and at least 70% by weight of dispersant selected from water, ethanol,
  • the dispersion particularly preferably contains 0.1 to 25% by weight.
  • hydrophobized silica 7 to 89 wt .-% water and 8 to 90 wt .-% ethanol, 1-propanol, 2-propanol or mixtures thereof.
  • Dispersions having such a composition have the advantage that in the inventive
  • the dispersion contains from 0.1 to 25% by weight of silica and at least 70% by weight of a mixture of water and at least one glycol monoalkyl ether selected from methyl, ethyl, n-propyl and n-butyl monoethers of Ethylene glycol,
  • glycol monoalkyl ethern from 1:11 to 3: 1.
  • Particularly preferred glycol monoalkyl ethers are ethylene glycol mono-n-butyl ether, propylene glycol monomethyl ether,
  • Dispersions having such a composition have the advantage that no flammable vapors occur in the use according to the invention.
  • the dispersion used according to the invention can be used in addition to an amorphous silica and a liquid
  • Dispersants contain other additives.
  • the dispersants contain other additives.
  • dispersion 0.03 to 5 wt .-% of a polymeric thickener.
  • a drainage of the dispersion from a sloping surface can be slowed down in the inventive use, so that even by a single
  • the thickener is a carboxyvinyl polymer in neutralized form or a cellulose ether.
  • Cellulose ethers can also be added to a
  • Carboxyvinylpolymer be used in neutralized form.
  • Carboxyvinyl polymers in the context of the invention are polymers obtainable by polymerization of vinyl monomers and containing the carboxylic acid groups. Carboxyvinyl polymers in neutralized form in the context of the invention
  • Carboxyvinyl polymers in which more than 50%, preferably more than 80%, of the carboxylic acid groups have been neutralized by deprotonation.
  • more than 50%, preferably more than 80%, of the carboxylic acid groups have been neutralized by deprotonation.
  • Carboxylic acid groups neutralize that an aqueous solution of the neutralized carboxyvinyl polymer has a pH in the range of 4 to 11, and more preferably from 6 to 9.5.
  • the carboxyvinyl polymer is neutralized with an alkanolamine, more preferably with tetrahydroxypropylethylenediamine.
  • Carboxyvinylpolymer can be achieved.
  • Preferred cellulose ethers are hydroxyethylcelluloses having an average molecular weight in the range of 2000 to 200,000.
  • the dispersion used according to the invention additionally contains, as adhesion promoter, a polysiloxane of the formula (I) or (II)
  • Dispersion preferably not more than 30 wt .-% water.
  • the polysiloxane has a molecular weight of less than 15,000 g / mol, and more preferably less than 1,000 g / mol.
  • the content of polysiloxane in the dispersion is preferably in the range of 0.1 to 5.0 wt .-%, particularly preferably 0.1 to 0.75 wt .-%.
  • the dispersion used according to the invention may optionally contain further constituents, for example fragrances and dyes. If that in one
  • the amount of alcohol contained alone is insufficient for preserving the dispersion and for suppressing bacterial growth
  • the dispersion may additionally contain preservatives, for example 2-methyl-4-isothiazolin-3-one,
  • silazane used has the formula (III) or (IV)
  • deagglomerated i. the agglomerates of the primary particles of the fumed silica are comminuted.
  • the comminution of the particles can take place both by grinding, for example a ball mill, and by shearing forces, for example in a disperser with a toothed disk or a rotor-stator unit. Preferably, this is done
  • the inclined smooth solid surface is formed by applying a dispersion used according to the invention to the surface and then evaporating the
  • Dispersant coated with particles of an amorphous silica Preferably, one of the above
  • the application of the dispersion to the surface can be done by any method. Preferably, this is done
  • the particularly preferred drop-free application methods have the advantage that when applied to the surface no siliceous dusts or aerosols can occur, so that even with the use of hydrophobized silicas with small particle sizes uptake of the particles into the lungs during processing without additional protective measures can be.
  • the inventive method also has the advantage that when a decrease in the effect, for example by
  • the method has the advantage that no harmful effects are achieved in order to achieve the effect according to the invention
  • Substances are required because the coating can be carried out with amorphous silicas, which are approved as additives for food or pharmaceuticals.
  • the coating of the surface with particles of an amorphous silica also does not increase the fire load.
  • the method according to the invention can be used to prevent the propagation of pests, such as cockroaches, through ventilation and installation shafts in buildings by coating a circumferential strip of the surface with particles of an amorphous silica in vertical sections of the shafts.
  • the method according to the invention can also be applied to the spread of pests, such as cockroaches, in
  • Furniture surfaces is coated with particles of an amorphous silica.
  • the inventive method can also be used to prevent on one
  • the method according to the invention can therefore also be used to sterilize contaminated surfaces by the action of
  • Insects such as flies, to prevent.
  • a dispersion according to the invention makes it possible in a simple manner to coat any smooth surfaces in such a way that insects can no longer find support on them, so that they slip or fall off inclined surfaces.
  • surfaces can be coated with particles of a hydrophobized silica in such a way that the particles adhere to the surface in the case of the air flows occurring in ventilation ducts and when the surface is rinsed off with water, and the effect according to the invention is retained.
  • Dispergierstoff exhibit can be at the same time a disinfection of the
  • Materials were prepared by spraying a dispersion of 5% by weight hydrophobic fumed silica Aerosil® R812S in decamethylcyclopentasiloxane (weight median particle size distribution, measured by
  • Potato beetles (Leptinotarsa decemlineata) were measured by running the untreated surface and the treated surface. In addition, the tensile force was determined on the recovery of the untreated surface in experimental animals that had previously attempted to run on the treated surface. The results of the experiments are summarized in Table 5. Examples 10 to 21 show that by the coating of the glass surface, the holding force of the limbs of
  • Aerosil® R812S was as described in Example 3 of WO 2011/006884 in a wet jet mill at a
  • the application suspension was prepared by brushing with silicone bristles, rollers with a paint roller for solvent-based paints or spraying with a brush
  • Airless sprayer FS80E from DEMA-Vertriebs GmbH was applied to the test bodies listed in Table 6 in the form of a circulating 5 cm wide strip.
  • the applied mass of dispersion was determined by brushing and rolling by weighing the reservoir and the brush before and after application, and spraying by weighing the test body before and after application
  • coated area was calculated assuming a density of the dried coating of 0.1 g / cm 3, the average thickness of the coating.
  • the coated test pieces were placed in a closed glass box containing two German cockroaches (Blatella germanica) and a cockroach bait was placed on top of the test piece. The movement of the cockroaches was followed by video cameras for 1400 min and the time taken for a cockroach to cross the coated strip. The for different test bodies and

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  • 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)

Abstract

Selon l'invention, on dispose une surface solide lisse, qui est inclinée et revêtue de particules d'une silice amorphe, dans la voie empruntée par des insectes non-volants pour se répandre pour ainsi empêcher lesdits insectes non-volants de se répandre. A cet effet, on utilise une dispersion contenant des particules d'une silice amorphe et un agent dispersant liquide pour diminuer l'adhérence des pattes d'insectes sur une surface solide revêtue avec ladite dispersion.
PCT/EP2013/051649 2012-01-30 2013-01-29 Procédé permettant d'empêcher des insectes non-volants de se répandre WO2013113685A1 (fr)

Applications Claiming Priority (2)

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DE201210201283 DE102012201283A1 (de) 2012-01-30 2012-01-30 Methode zum Verhindern einer Ausbreitung von laufenden Insekten
DE102012201283.4 2012-01-30

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WO2013113685A1 true WO2013113685A1 (fr) 2013-08-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11851583B2 (en) 2016-07-19 2023-12-26 Evonik Operations Gmbh Process for producing porous polyurethane coatings using polyol ester additives

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2818340A (en) 1954-04-13 1957-12-31 Du Pont Protecting animal food
US3159536A (en) 1960-04-22 1964-12-01 Monsanto Co Hydrophobic siliceous insecticidal compositions
EP0367934A1 (fr) 1988-10-19 1990-05-16 Degussa Aktiengesellschaft Insecticides
WO1994009626A1 (fr) 1992-11-03 1994-05-11 Sil-Tech International Corporation Compositions de lutte contre les insectes
EP0722992A1 (fr) 1995-01-12 1996-07-24 Degussa Ag Oxyde mixte pyrogénique modifié en surface, procédé pour sa préparation et son utilisation
WO2001035744A1 (fr) * 1999-11-18 2001-05-25 Sorex Limited Compositions pesticides comprenant un gel aere qui renferme de la silice hydrophobe
WO2005063369A1 (fr) 2003-12-23 2005-07-14 Degussa Ag Procede et dispositif pour produire des dispersions
WO2005104851A2 (fr) 2004-05-03 2005-11-10 Degussa Ag Dispersion presentant des proprietes insecticides
WO2006000752A1 (fr) * 2004-06-23 2006-01-05 Ye Olde Upton Delicatessen Piege a insectes ameliore
WO2011006884A2 (fr) 2009-07-15 2011-01-20 Conductix-Wampfler Ag Système de charge inductive de véhicules pourvu d'une aide électronique au positionnement

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2818340A (en) 1954-04-13 1957-12-31 Du Pont Protecting animal food
US3159536A (en) 1960-04-22 1964-12-01 Monsanto Co Hydrophobic siliceous insecticidal compositions
EP0367934A1 (fr) 1988-10-19 1990-05-16 Degussa Aktiengesellschaft Insecticides
WO1994009626A1 (fr) 1992-11-03 1994-05-11 Sil-Tech International Corporation Compositions de lutte contre les insectes
EP0722992A1 (fr) 1995-01-12 1996-07-24 Degussa Ag Oxyde mixte pyrogénique modifié en surface, procédé pour sa préparation et son utilisation
WO2001035744A1 (fr) * 1999-11-18 2001-05-25 Sorex Limited Compositions pesticides comprenant un gel aere qui renferme de la silice hydrophobe
WO2005063369A1 (fr) 2003-12-23 2005-07-14 Degussa Ag Procede et dispositif pour produire des dispersions
WO2005104851A2 (fr) 2004-05-03 2005-11-10 Degussa Ag Dispersion presentant des proprietes insecticides
WO2006000752A1 (fr) * 2004-06-23 2006-01-05 Ye Olde Upton Delicatessen Piege a insectes ameliore
WO2011006884A2 (fr) 2009-07-15 2011-01-20 Conductix-Wampfler Ag Système de charge inductive de véhicules pourvu d'une aide électronique au positionnement

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
B. PRÜM ET AL., J. R. SOC. INTERFACE, vol. 9, 2012, pages 127 - 135
E. V. GORB ET AL., J. R. SOC. INTERFACE, vol. 7, 2010, pages 1571 - 1579
J. AIZENBERG ET AL., NATURE, vol. 477, 2011, pages 443 - 446
J. R. SOC. INTERFACE, vol. 9, 2012, pages 127 - 135
S. N. GORB, ATTACHMENT DEVICES OF INSECT CUTICLE, 2001
U. BAUER; W. FEDERLE, PLANT SIGNALING & BEHAVIOUR, vol. 4, 2009, pages 1019 - 1023

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11851583B2 (en) 2016-07-19 2023-12-26 Evonik Operations Gmbh Process for producing porous polyurethane coatings using polyol ester additives

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