FR2952085A1 - Protecting habitations against insects, preferably termites, comprises spraying a polymer composition having e.g. dispersion/aqueous emulsion of film-forming binder, in interior parts of e.g. ducts, and hardening by water evaporation - Google Patents

Abstract

Protecting habitations against insects, preferably termites, comprises spraying, in the interior parts of ducts, pipes and/or channels, before or after construction of the frame, a polymer composition comprising a dispersion/an aqueous emulsion of a film-forming binder containing an insecticide and hardening by water evaporation, preferably within 12 hours, to obtain a continuous uniform protection film in which the insecticide is encapsulated, the film-forming binder is e.g. polymers or acrylic copolymers and acrylic or vinylic styrene. Process for protecting habitations against insects, preferably termites, comprises spraying, in the interior parts of ducts, pipes and/or channels, before or after construction of the frame, a polymer composition comprising a dispersion or an aqueous emulsion of a film-forming binder containing an insecticide and hardening by water evaporation, preferably within 12 hours, to obtain a continuous uniform protection film in which the insecticide is encapsulated, the film-forming binder is a acrylate, styrene-acrylate or vinyl polymer or copolymer, natural latex, siloxane, dispersions or emulsions of natural or synthetic waxes and/or dispersions or emulsion of polyolefins. polymeres ou copolymeres acryliques, styrene-acryliques, ou vinyliques,.

Description

The present invention relates to a method of protecting homes against insects, particularly termites. In many parts of the world, termites are a real plague that can cause considerable damage in the five homes by destroying wooden buildings. To fight against this scourge, various methods of antitermite protection have already been proposed, which may be of a curative nature, that is to say carried out after construction of the frame or of a preventive nature, that is to say consisting of a treatment of building surfaces, before construction. The curative methods generally consist in applying to the periphery of dwellings various compositions containing an insecticidal agent. The preventive methods conventionally consist in applying liquid products containing a dose of insecticide to the building surfaces, in particular by spraying, spraying or spreading, or on unrolling films on these surfaces in which an insecticide is incorporated. In recent years, the Decree of 27 June 2006 on the application of Articles R 112.2 and R 112.4 of the Building and Housing Code, regulates the protection of buildings against termite infestation. This decree is relatively restrictive insofar as it requires the application of physical, physicochemical or control protection barriers on the surfaces to be protected and has made the treatment of the soil by spraying insecticide non-compliant. To meet these requirements, it has been proposed, in preventive treatment, to apply on the surfaces to be built compositions based on polymers of different kinds or films containing an insecticidal agent, or mechanical devices of the type roasting . After treatment, a concrete slab is cast on the surface thus equipped with a protective barrier which is intrinsically sufficiently compact and free of cracks to exclude the passage of termites. Such preventive treatment may be supplemented by the application of antitermite protection barriers on not only essentially horizontal but also vertical or steeply inclined frame surfaces such as breeze blocks, shuttering panels, various coatings, etc.

2 These protective barriers, however, are not likely to provide complete protection of homes against termites, and can not be completed in curative treatment, that is to say after construction of the house.

The present invention aims to remedy this disadvantage. For this purpose, it was considered that ducts, pipes and / or pipes could constitute a privileged access route for termites to the inner part of dwellings, until today left untreated, and we had the idea of fill this gap. The invention therefore proposes a method for protecting homes against insects and in particular termites, characterized in that internal sheaths, pipes and / or pipes are sprayed before or after construction of the frame, a polymer composition consisting of an aqueous dispersion or emulsion of a film-forming binder containing an insecticidal agent and capable of curing by evaporation of water, preferably in less than 12 hours, so as to obtain a continuous uniform protective film in which the insecticidal agent is encapsulated.

Such a method, which can be implemented both in preventive treatment and curative treatment, can effectively complement the traditional antitermite treatment methods so as to provide optimum protection of homes. The application of the polymer composition may be carried out using any spraying system which may be manual, such as a spray or sprayer, or mechanically, electrically actuated by means of a pump or pump. a compressor such as a conventional pneumatic gun, or an airless® high-pressure gun or a medium-pressure Airmix® type gun.

However, it is advantageous to use for this purpose a spray-type vaporizer household products or plant spray, which has the advantage of being particularly inexpensive and very easy to use, even for a non-specialist. It should be noted that in the context of the invention, the expression "polymeric composition" must be understood in a very broad sense and in fact denotes any composition of a nature to form after application and drying a continuous film which is extends over the entire surface to be treated.

According to the invention, the film-forming binder is chosen from the group formed by acrylic, styrene-acrylic or vinyl polymers or copolymers as well as by natural latices, siloxanes, dispersions or emulsions of natural or synthetic waxes, and dispersions. or polyolefin emulsions and mixtures thereof. According to a preferred feature of the invention, the polymer composition is sprayed at the inlet and / or outlet of the sheaths, pipes and / or pipes over a length of between 5 centimeters and 1 meter.

It is thus possible to obtain a coating film which perfectly matches the inner contours of the inlets and outlets of the ducts, pipes and / or ducts and constitutes, to this extent, after drying, a continuous protective barrier of a nature to prevent any termite penetration into the interior. the dwellings by this way of access.

According to another characteristic of the invention, at least 50 ml of polymer composition, in the order of from 50 ml to 500 ml of polymer composition per square meter of surface area, are applied to ducts, pipes and / or ducts. treat. During this application, the polymer composition spreads homogeneously on the inner surface of the sheaths, pipes and / or pipes to be protected and forms, after drying, a uniform film whose thickness is generally between 20 μm and 200 μm. The insecticides added to the polymer composition are variable and relate to all the molecules belonging to class 18 of the biocidal directive. The following insecticides may be used: bifenthrin, chlorfenapyr, fipronil or permethrin or mixtures thereof. By way of example, from 0.50 to 3.00% by weight of bifenthrin or from 2.50 to 15.00% by weight of permethrin may be added to the polymer composition. According to another characteristic of the invention, the polymer composition contains mineral fillers and / or pigments. These components serve to color the polymer composition and thus better control its application on the surface to be treated. In addition, the mineral filler makes it possible to significantly lower the cost of this composition, and also to facilitate and improve its drying after application. The pigments or mineral fillers thus added to the polymer position can advantageously be chosen from the group consisting of calcium carbonate, dolomite, talc, mica, barium sulfate, alumina hydrate, lithopone, zinc sulphide, and silica and mixtures thereof. These are common compounds readily available commercially. Such pigments or fillers may advantageously have a particle size of between 0.1 and 100 μm, preferably between 5 and 50 μm. According to another characteristic of the invention, the polymer composition contains conformational additives preferably selected from the group consisting of dispersing agents, antifoaming agents, thickening agents, coalescing agents and mixtures thereof. These conformation additives have the function of allowing the polymer composition to be adapted so as to obtain a coating which spreads homogeneously over the inner surface of the sheaths, pipes and / or pipework to be protected on application. and forms a uniform thin film after drying. According to a particularly advantageous characteristic of the invention, the polymer composition contains, in weight proportion, 10 to 50%, preferably 30 to 40% of film-forming binder. According to another particularly advantageous characteristic of the invention, the polymer composition contains, in weight proportions: 0 to 70% of mineral fillers, 0 to 1% of dispersing agents, 0 to 1% of antifoam agents, 0 to 5% coalescing agents, 0.1 to 5% thickening agents, and 0 to 0.5% wetting agents. It should be noted that for the process according to the invention to be entirely satisfactory, it is advantageous that after its application, the polymer composition dries quickly, preferably in less than 12 hours to allow intervention on the site the day after this application. The characteristics of the process which is the subject of the invention will be described in more detail with reference to the examples below of polymer compositions which can be applied by the process according to the invention.

EXAMPLE 1 Polymer Composition Supplier Solvent Weight Water 90.00 Envirogem E360 Air Products Wetting Agent 10.00 Coatex P90® Coatex Dispersant 2.00 Clerol Antifoam Agent PLB 847® Cognis 2.00 Charge Durcal 10® Omya 400.00 Tiona 595 Pigment ® Millenium 20.00 Acronal Binder 290 D® BASF 444.00 Dowanol PnB® Dow Chemicals Coalescing Agent 20.00 Rhealis 1230® Coatex Thickener 12.00 Total 1000.00 EXAMPLE 2 Polymer Composition Supplier Solvent Weight Water 351.00 Agent Envirogem E360 Air Products wetting agent 10.00 Coatex P90® Coatex dispersing agent 1.00 Clerol PLB 847® Cognis antifoaming agent 2.00 Durcal 10® Omya load 100.00 Acronal 290 D® BASF binder 500.00 Dowanol PnB® Dow coalescing agent Chemicals 20.00 Rhealis Thinner 1230® Coatex 16.00 Total 1000.00 EXAMPLE 3 Polymer Composition Supplier Solvent Weight Water 190.00 Envirogem E360 Air Products Wetting Agent 10.00 Coatex P90® Coatex Dispersing Agent 2.00 Antifoam Agent Clerol PLB 8 47 Cognis 2.00 Charge Durcal 10® Omya 578.00 Acronal Binder 290 D® BASF 200.00 Dowanol PnB® Coalescing Agent Dow Chemicals 10.00 Rhealis Thinner 1230® Coatex 8.00 Total 1000.00 EXAMPLE 4 Polymer Composition Supplier Mass Solvent Water 480.00 Wetting Agent Zonyl FS610 Dupont 2.00 Coatex P90® Coatex Dispersing Agent 1.00 Tegofoamex 825 Evonik Defoaming Agent 2.00 Tiona 595® Millenium Powder 10.00 Acronal Binder S559® BASF 500.00 Thickening Agent Kelcocrete 80® CP Kelco 5.00 Total 1000.00 EXAMPLE 5 Polymeric Composition Supplier Mass Wetting agent Zonyl FS610 Dupont 2.00 Tegfoamex 825 antifoam agent Evonik 2.00 Acronal Binder S559® BASF 996.00 Total 1000.00 6 5 EXAMPLE 6 Polymer Composition Supplier Solvent Weight Water 250.00 Envirogem E360 Air Products Wetting Agent 10.00 Coatex P90® Coatex Dispersing Agent 1.00 Clerol Antifoam Agent PLB 847® Cognis 2.00 Charge Durcal 10® Omya 200.00 CEF Vinnapas Binder 52 W® Wacker 534.00 Thickened Agent health Rhealis 1230® Coatex 3.00 Total 1000.00 EXAMPLE 7 Polymer Composition Supplier Solvent Weight Water 128.00 Wetting agent Zonyl FS610 Dupont 2.00 Coatex dispersant P90® Coatex 2.00 Tegofoamex antifoam agent 825 Evonik 2.00 Charge Durcal 10® Omya 404.00 Binder 1 Silbers BS 1306® Wacker 224.00 Binder 2 Acronal S559® BASF 224.00 Thickener 1 Viscoatex 46® Coatex 4.00 Thickener 2 Rhealis 1230® Coatex 10.00 Total 1000, EXAMPLE 8 Polymer composition Supplier Mass Solvent Water 128.00 Envirogem E360 Air Products wetting agent 10.00 Coatex P90® Coatex dispersing agent 2.00 Clerol antifoam agent PLB 847® Cognis 2.00 Charge Durcal 10® Omya 427.00 Binder 1 Silbers BS 45® Wacker 211.00 Binder 2 Acronal S559® BASF 211.00 Viscoatex 46® Coatex Thickener 9.00 Total 1000.00 7 EXAMPLE 9 Polymer Composition Supplier Solvent Weight Water 127.00 Wetting agent Zonyl FS610 Dupont 2, 00 Coatex P90® Coatex Dispersing Agent 2,00 Antioxidant se Clerol PLB 847® Cognis 2.00 Charge Durcal 10® Omya 225.00 Binder 1 Silbers BS 1306® Wacker 314.00 Binder 2 Acronal S559® BASF 314.00 Thickener Viscoatex 46® Coatex 14.00 Total 1000.00 EXAMPLE 10 Polymer Composition Supplier Mass Solvent Water 119.00 Envirogem E360 Air Products Wetting Agent 10.00 Coatex P90® Coatex Dispersing Agent 2.00 Clerol Antifoam Agent PLB 847® Cognis 2.00 Charge Durcal 10® Omya 398.00 Permanol AP5 Binder ® Clariant 438.00 Viscoatex 46® Coatex Thickener 31.00 Total 1000.00 EXAMPLE 11 Polymeric Composition Supplier Solvent Weight Water 129.00 Wetting Agent Zonyl FS610 Dupont 2.00 Coatex P90® Coatex Dispersing Agent 2.00 Clerol Antifoam Agent PLB 847® Cognis 2.00 Charge Durcal 10® Omya 414.00 Binder 1 Baysilone Emulsion WA® Momentive 227.00 Binder 2 Acronal S559® BASF 214.00 Thickener Viscoatex 46® Coatex 10.00 Total 1000.00 8 EXAMPLE 12 Polymer Composition Supplier Mass Solvent Water 102.00 Agent wet nt Envirogem E360 Air Products 10.00 Coatex P90® Coatex Dispersing Agent 2.00 Clerol PLB 847® Cognis Antifoam Agent 2.00 Durcal 10® Omya Load 482.00 Licomer W483 Clariant Binder 377.00 Viscoatex 46® Coatex 25 Thickener, 00 Total 1 000,00 It should be noted that the various constituents of these compositions are designated under their commercial reference. The chemical nature of these constituents are as follows: Acronal 290D: Acronal Acrylic Styrene Acrylic Dispersion S559: Acrogem Acrylic Styrene Dispersion E360: Epichlorohydrin and 2-Mercaptoethanol Reaction Product Zonyl FS610: Coatex P90 Fluorinated Surfactant: Dispersant acrylic Clerol PLB 847: copolymer of ethylene oxide and propylene oxide Tegofoamex 825: Silicone antifoam agent Durcal 10: calcium carbonate Tiona 595: Dioxide of titanium Dowanol PnB: glycol ether Rhéalis 1230: acrylic thickener Kelcocrete 80: (thickener, xanthan gum) Vinnapas CEF 52W: Dispersion of copolymer of vinyl acetate and vinyl chloride Silres BS 1306: silicone emulsion Silres BS 45: Permanol AP5 silicone emulsion: Viscoatex 46 polyethylene emulsion: Baysilone acrylic emulsifier emulsion WA: Licomer W 483 silicone emulsion: carnauba wax emulsion 9 2952085 lo

All of these compositions should be supplemented with 1.5% bifenthrin or 8% permethrin. 5

Claims (1)

CLAIMS 1 °) Method of protecting homes against insects, especially termites, characterized in that is sprayed in the inner sheaths, pipes and / or pipes, before or after construction of the frame, a polymer composition consisting of a dispersion or an aqueous emulsion of a film-forming binder containing an insecticidal agent and capable of curing by evaporation of water, preferably in less than 12 hours, so as to obtain a continuous uniform protective film in which the agent insecticide is encapsulated, the film-forming binder being chosen from the group formed by acrylic, styrene-acrylic or vinyl polymers or copolymers, as well as by natural latices, siloxanes, dispersions or emulsions of natural or synthetic waxes and dispersions or emulsions of polyolefins, and mixtures thereof. 2) Method according to claim 1, characterized in that the polymer composition is sprayed at the inlet and / or outlet of the sheaths, pipes and / or pipes over a length of 5 centimeters and 1 cm. metre. Process according to one of Claims 1 and 2, characterized in that at least 50 ml of polymer composition is applied in ducts, pipes and / or ducts, generally in the order of 50 ° C. ml to 500 ml of polymer composition per square meter of area. 4) Method according to any one of claims 1 to 3, characterized in that the insecticidal agent is selected from the group consisting of bifenthrin, chlorfenapyr, fipronil or permethrin and mixtures thereof. 5. Process according to any one of Claims 1 to 4, characterized in that the polymer composition contains pigments and / or mineral fillers preferably chosen from the group formed by calcium carbonate, dolomite, talc mica, barium sulphate, alumina hydrate, lithopone, zinc sulphide, silica, and mixtures thereof and preferably having a particle size of between 0.1 and 100 μm, in particular between and 50 μm. Process according to any one of Claims 1 to 5, characterized in that the polymer composition contains conformational additives preferably chosen from the group consisting of dispersing agents, antifoam agents, thickening agents and coalescing agents. , and their mixtures. 7. Process according to any one of claims 1 to 6, characterized in that the polymer composition contains, in a weight proportion of 10 to 50%, preferably 30 to 40%, of film-forming binder. Process according to Claim 7, characterized in that the polymer composition contains, in a proportion by weight: 0 to 70% of mineral fillers, 0 to 1% of dispersing agents, 0 to 1% of defoaming agents 0 to 5% coalescents, 0.2 to 5% thickeners, and 0 to 0.5% wetting agents. Process according to any one of claims 1 to 8, characterized in that the polymer composition is sprayed with a spray-type sprayer for household products or a plant spray.