CN1291075A

CN1291075A - Barrier preventing wood pest access to wooden structures

Info

Publication number: CN1291075A
Application number: CN98813980A
Authority: CN
Inventors: P·范沃里斯; D·A·卡塔尔多; F·G·伯顿
Original assignee: Battelle Memorial Institute Inc
Current assignee: Battelle Memorial Institute Inc
Priority date: 1998-02-20
Filing date: 1998-02-20
Publication date: 2001-04-11
Also published as: TR200002434T2; EP1056339A1; AU749956B2; EA003788B1; WO1999041983A1; AU6177398A; BR9815678A; KR20010052178A; EA200000855A1; JP2002503680A; CA2320948A1; IL137961A0

Abstract

A method and device are disclosed which prevent the intrusion of insects (termits, ants) into wood structures by using a barrier comprising a polymer (preferably a polyurethane) having incorporated therein a pesticide (pyrethroid or oganophosphate insecticide). The insecticidal agent may be incorporated into the polymer by itself or in association with a carrier (preferably carbon black or activated carbon) as a bound friable mix. The barrier is placed between the wood structure (e.g. a wall or windowsill) and a non-wood structural portion such as soil. In the disclosed method the barrier maintains a minimal effective level of insecticide for a predetermined period of time.

Description

Prevent the barrier film of wood pest access to wooden structures

FIELD OF THE INVENTION

The present invention relates to prevent that wood borers (as termite and moth) from entering the barrier film of wooden structures with long-term protection wooden structures.More particularly, the present invention relates to a kind of composition and method that produces and keep the shallow trench isolation of insect pest such as termite, ant and other moth.Term used herein " biologically active " is meant in order to stop usually in passive mode to the mode stimulating organism body that comprises death.

The background of invention

The timber that contacts with concrete, as the timber in the wooden building structure, destroyed with timber that contacts with soil such as the structure meeting under the invasion and attack of termite, ant and other moth of hedge post, public utilities bar, the horizontal sleeper of railway and wooden supporter.Use of insecticide protects timber to avoid the invasion of this insect.

In the wooden building structure, structure can be destroyed under one or more wood borers that include, but are not limited to termite, ant and other moth attack for the timber that contacts with concrete.Prevent at present or postpone that the method that insect expands comprises fumigating system, it is with the total sealing, discharges insecticide in structure.The shortcoming of this method comprises the problem of ecological and human health, and the concentration of fumigant is reduced to the limited time that is enough to allow the insect intrusion.

Although insecticide can prevent the invasion and attack of moth effectively, insecticide must apply to some months or year repeatedly every several days, to guarantee validity.If apply the insecticide of abundant effective dose separately in a period of time, then they can produce the problem of ecology, human health, and can produce offensive odour, problems such as soil leaching and insecticide volatility.And even apply the insecticide of maximum separately, it also can dissipate in the short period of time, and need apply again.

Another shortcoming of conventional applying method be when beginning by the concentration that applies the biological active component due to the insecticide separately far above effective required minimum flow, keep the required minimal effective dose of barrier effect but be brought down below in the short period of time soon.

For this reason, many technology that are used for sustained release chemical substance such as insecticide had been developed in recent years already.These methods use polymeric matrix and microcapsules to discharge insecticide.

The United States Patent (USP) 4 of Cardarelli, 400,374 have disclosed and use the polymeric matrix of being made by polyethylene, polypropylene, vinyl-vinyl acetate copolymer, polyamide, polystyrene, polyvinyl acetate or polyurethane usually to control insecticide, as the release of the insecticide buied with trade name Dursban.At United States Patent (USP) 4,400, add porous mark (porosigen) in the polymeric matrix that discloses in 374 and dissolve the porosity depressant of matrix when contact with soil moisture or aqueous environment.

Similarly, the United States Patent (USP) 4,405,360 of Cardarelli relates to a kind of polymer that can be made up of polyamide, polyurethane, polyethylene, polypropylene, polystyrene and other polymer and discharges matrix.The mechanism of sustained release is used to discharge weed killer herbicide in a humid environment with the porous mark.

A shortcoming of Cardarelli method is to have enough moisture to dissolve matrix.Between the dry season, although can prolong the life-span of matrix, it can reduce the concentration of insecticide, thereby allows insect enter.In addition, the life-span of matrix is variable and depends on the content of moisture.

In addition, the United States Patent (USP) 4,435,383 of Wysong has proposed to be used to comprise the sustained release mechanism of the insecticide of carbamates, organic group thiophosphate, organophosphorus compounds, perchlorinate organic matter and synthetic pyrethroid.This relieving mechanism comprises the hydrophobic barrier monomer, i.e. styrene and/or methyl styrene, and the monomer that is selected from one or more unsaturated monobasics or dicarboxylic acids.

Another piece document, promptly the United States Patent (USP) 4,282,209 of Tocker has disclosed a kind of method for preparing insecticide-polymer beads.Insecticide, promptly Methomyl is used to control the insect of infringement tobacco, cotton or crops.Methomyl is dissolved by the polymer such as polyamide, polyurethane and epoxy, so that the remaining insecticidal activity of prolongation to be provided.

Second piece of patent of Tocker, United States Patent (USP) 4,235,872 have disclosed the insecticide microcapsules that use slowly-releasing, these microcapsules contain by full aromatics (allaromatic), uncrosslinked polyureas covering around the Methomyl core.In the scheme of this Patent publish, Methomyl is used to protect vegetables, field crop and fruit crop.

The 6th piece of document, promptly the United States Patent (USP) 4,198,441 of Young etc. has disclosed use of insecticide such as Dursban in the sustained release matrix that comprises organopolysiloxane, hydrolyzable silane and hydrolyzable organic titanium.

In addition, the United States Patent (USP) 4,160,335 of Young etc. has disclosed a kind of mode that striped is applied to dispersed insect control material on the glassine paper sheet.The insect control material that can comprise Dursban also can be placed in the polymer.

Another kind method is described among the Australian Patent AU-B-82443/91.In this patent, two plastic sheets of pulling out from upply spool have been described.Down the upper surface and last slice the lower surface of sheet are pulled through each applicator roll, on each surface of insecticide (as permethrin) the coating paint sheet that these applicator rolls will be in volatile solvent.The coating surface of sheet is passed through between pressure roller, they are combined.With the sheet that applies and pressed be placed on building lot below, or be placed on trees or plant around, to prevent the infringement of termite.The shortcoming of this product and method comprises (1) layer, and isolated to make quick dissipation of coating and (2) coating and sheet be not whole, so just makes coating quickly by the sheet diffusion and limit useful life.

The particle that applies contains the insecticide that absorbs on matrix such as the clay, then applies it with crosslinked resin, to help to slow down rate of release.Clay is in the short time internal loss in several weeks at the most or discharge insecticide.

Although prior art has disclosed really to use and has been added to as the insecticide in the polymeric matrix of sustained release agent, do not have one piece of document to mention and produce and lasting several years of maintenance or shallow trench isolation in full force and effect for more time.Wish to produce a kind of zone, so that can prevent wooden structures and can damage any contact between the insect of this structure.Need reliable shallow trench isolation, reach the time more than 1 year basically with the protection wooden structures.

Therefore, for the foregoing reasons, an object of the present invention is to provide a kind of insecticide zone of protecting wooden structures.This zone is made up of the barrier film of long-term low volatility and the high volatile volatile short-term barrier film of protection soil.

Another object of the present invention is to keep about 10 to 20 years long time of shallow trench isolation.

The general introduction of invention

The present invention is that a kind of to have in structure be the wood borers barrier film in effective life-span in the operating period.The described life-span is by insecticide being bonded in the polymeric matrix, reaching thereby prevent to discharge insecticide basically from polymer.Bonding can realize like this, is about to insecticide and carrier and is mixed into bonding friable mixture (boundfriable mix), and the friable mixture that then will bond is placed in the polymeric matrix.

The barrier film can be used including, but not limited to scrim, screen cloth, sheet and its composition and be replenished at interior extra play.Extra play can comprise with the barrier film in second kind of identical or different insecticide of insecticide.In addition, can allow second kind of insecticide from extra play, discharge, to strengthen the short-term protection.

Barrier film and/or extra play are made with the polymer that is selected from thermoplastic polymer, thermosetting polymer, elastomer polymer and its copolymer.Insecticide is added in the polymer, insecticide can keep or discharge with a certain speed, continuous and effective ground is as toxic agent or the pest repellant of the insect that damages wooden structures for a long time to make them, and the concentration of remaining valid in the barrier film is simultaneously passed through the barrier film to prevent that insect from invading.

Press one aspect of the present invention, a kind of polymer-carrier system is provided, wherein insecticide being bonded to becomes a kind of bonding friable mixture on the carrier.The sheet that will contain the friable mixture that bonds then places near the wooden structures place, to form the barrier film that does not allow wood borers invade.Extra play can be for slowly and discharge volatile insecticide more consistently a kind of means are provided, so as in the soil around the wooden structures, to produce one on the barrier film barrier region beyond itself.Polymer comprises thermoplastic polymer, thermosetting polymer, elastomer polymer and copolymer thereof, and insecticide comprises the series pesticide agent that is called pyrethrins.

By another aspect of the present invention, produce a shallow trench isolation by an extrusion (extrusion) being set in place near wooden structures to be protected.This extrusion contains can control the polymer transport system that insecticide discharges.Carrier system keeps stable and effective insecticidal agent concentration for a long time in shallow trench isolation.

By another aspect of the present invention, provide a kind of pill that contains polymer and insecticide, so that in the shallow trench isolation of wooden structures, produce and be kept for the equilibrium concentration of the insecticide of ant, termite and other wood borers.Place the place of close wooden structures to handle soil this pill, thereby the protection wooden structures is avoided the infringement of termite, ant and other moth.Can adopt the whole bag of tricks pill to be placed the place of close wooden structures.In addition, pill can insert plate in or even be included in the foams.In example preferably, polymer comprises thermoplastic polymer, thermosetting polymer, elastomer polymer and copolymer thereof, and insecticide is a pyrethrins.

By another aspect of the present invention, produce shallow trench isolation by injecting the hot-melt polymer mixture.The sustained release parts comprise one or more pyrethrinss and polymer, and described polymer is selected from thermoplastic polymer, elastomer polymer and copolymer thereof.

By some aspects more of the present invention, the sustained release parts that serviceability temperature drives provide shallow trench isolation.

By another aspect of the present invention, use the sustained release parts to fumigate structure.

Wish to place the barrier film or produce a zone and prevent any contact between wooden structures and the insect that can damage this structure.Shallow trench isolation needs, to protect wooden structures for a long time.

Of the present invention aspect another in, the high density polymer that contains the low volatility insecticide that low rate of release insecticide can be provided with contain low-density (soft) combination of polymers of higher volatile insecticide, thereby a reliable shallow trench isolation is provided.

Therefore, in view of foregoing, an object of the present invention is to provide a kind of barrier film of protecting the insecticide of wooden structures.

Another object of the present invention provides a kind of barrier film and contains the shallow trench isolation on long-term low volatility barrier film and high volatile volatile short-term barrier film, to protect contiguous soil.

A further object of the present invention is promptly about 10 to 20 years of the time that keeps the barrier film long.

The present invention will and get the best understanding with reference to following detailed description in conjunction with the accompanying drawings together with subsidiary purpose and advantage.

Brief description of drawings

Fig. 1 has illustrated first example of the present invention, and it comprises the molten sticking mixture of physics of spunbond polymer sheet and polymer and insecticide, wherein the mixture of polymer and insecticide with spot bond to polymer sheet.

Fig. 2 has illustrated second example of the present invention, and it comprises the molten sticking mixture of physics of spunbond polymer sheet and polymer and insecticide, and wherein the mixture of polymer and insecticide is bonded on the polymer sheet with strip.

Fig. 3 has illustrated first kind of mode using example of the present invention shown in Fig. 1 and 2 and discharge the shallow trench isolation of insecticide generation.

Fig. 4 has illustrated the second way of using the present invention first and second example to produce shallow trench isolation.

Fig. 5 has illustrated the third mode of using example of the present invention shown in Fig. 1 and 2 to produce shallow trench isolation.

Fig. 6 has illustrated the 3rd example of the present invention of cylindrical extrusion form.

Fig. 7 has illustrated the 4th example of the present invention of flat rubber belting extrusion form.

Fig. 8 has illustrated and has used example of the present invention shown in Figure 6 to produce the mode of shallow trench isolation.

Fig. 9 has illustrated and has used example of the present invention shown in Figure 7 to produce the mode of shallow trench isolation.

Figure 10 has illustrated the example of another pill of the present invention, and wherein pill inserts near in the soil of wooden structures.

Figure 11 has illustrated the cross-sectional view that places lip-deep pill.

Figure 12 has illustrated that the use foams are administered to pill on the xoncrete structure.

Figure 13 has illustrated the cross-sectional view of concrete foundation after applying foams.

Figure 14 has illustrated the pill that places on the plate.

Figure 15 has illustrated the plate that contains pill that is applied on the concrete foundation.

Figure 16 has illustrated the hot melt injection.

Figure 17 has illustrated the interval of hot melt injection.

Figure 18 has illustrated the connector (plug fumigating cement blocks) of stifling cement block.

Figure 19 has illustrated the mode that applies of the connector of stifling cement block.

Figure 20 has illustrated stratiform device of the present invention.

Figure 21 has illustrated the insect-repellent to the Eastern subteranean termites.

Figure 22 has illustrated the insect-repellent to the Formosan subteranean termites.

Describe in detail

Have found that and just can obviously reduce the insect that can damage this wooden structure when in the soil that remains on wooden structure periphery that for a long time barrier layer combined separately or with the shallow trench isolation of pesticide. Shallow trench isolation is that a kind of capacity chemical agent that contains is to stop faunistic zone. In the present invention, chemical agent is a kind of pesticide, and fauna is insect, especially moth such as termite and ant. By the present invention, pesticide is retained in the barrier layer and/or from the control release parts that contain the polymeric matrix system and discharges, and described parts will be kept 6 years at least.

Control discharge parts refer to a kind of can control and to continue that the biologically active chemical substance is discharged into its surface upper and be discharged into device the surrounding medium (such as soil) from its surface. This device provides a kind of method that is discharged in the surrounding environment that chemical substance is controlled. Originally these parts discharge pesticide with high speed, then discharge pesticide with lower, stable speed. This dispose procedure has guaranteed that wooden object is protected in the short period of time, after reaching minimal effective dose, only discharges the pesticide that substitutes decomposition pesticide aequum. This dispose procedure has reduced latency environment and the health problem processed, and has reduced processing cost. The release speed of device only depends on the structure of device, and irrelevant with external factor (such as water).

Control discharges parts provides a kind of recent solution to mid-term, and it is with required speed pesticide to be discharged in the soil, thereby produces a zone of containing " minimal effective dose " pesticide that prevents that the insect intrusion is required. Used term " minimal effective dose " is defined as and is preventing that insect from entering the amount of pesticide required in the zone in this zone in this specification and the appended claims, and this specific amount depends on specific insect and specific pesticide. When placing the structure division of close ground or below ground, in the close soil of this device, produce a shallow trench isolation. When between the wooden structure division that places non-wooden structure division and connect, the interface between non-wooden structure division and the wooden structure division that connects produces shallow trench isolation.

Better used pesticide should be the pesticide that is used for killing or removing termite, ant and other moth of Environmental Protection Agency USA's approval in the example. Being preferred at present pesticide of the present invention is pyrethrins, and it comprises seven Flumethrins, chlorine flucythrinate, cyfloxylate (cyfluthrin) and decis. Yet what the technology skilful person of this area should understand is that other effective pesticide such as isofenphos, fenvalerate, cypermethrin, Permethrin and pyrethrum ester also can use. These pesticides can be available from many merchandise resourceses, as being respectively Dow, Mobay, ICI, Velsicol and FMC. By the present invention, the combination of pesticide, or the combination of one or more pesticides and other biologically active component such as bactericide also is operable.

The first control of the present invention discharges example and is shown among Fig. 1, and it produces shallow trench isolation with the polymer of controlling the release pesticide-carrier device. This example comprises spunbond polymer sheet 20, and the physics fusible mixture of polymer and pesticide (be illustrated as in Fig. 1 and 3-5 a little 21). Spunbond polymer sheet 20 can be to weave or nonwoven textiles, and perhaps it can be polymer sheet. This textile can obtain from many manufacturers such as Reemay, Exxon Fibers and Phillips Fibers. This textile better is to weave or non-woven polypropylene.

Polymer in the fusible mixture can comprise thermoplastic polymer, thermosetting polymer, elastomer polymer or its copolymer of any number. Compatibility and the environmental condition of required release speed, polymer and pesticide depended in the selection of polymer. Limit the scope of the invention as exemplifying and not wanting, can use following polymer: high density polyethylene (HDPE), low density polyethylene (LDPE), polyvinyl acetate, urethane polymer, polyester, santoprene, polysiloxanes or neoprene. Yet polymer is high density and low density polyethylene (LDPE) preferably. Although can use above-mentioned pesticide to reach optimum, Utopian pesticide should comprise chlopyrifos.

The mixture of polymer and pesticide can point-like place on the spunbond polymer sheet. These points should be the intervals, in order to keep fully the amount of pesticide to be higher than minimal effective dose in shallow trench isolation. Minimal effective dose is to be used in the zone preventing that insect from invading the minimum of required pesticide. The diameter of Fig. 1 and 3-5 mid point 21 better is about 0.5-1.5 centimetre, and it highly better is about 0.5-1.5 centimetre. The size and shape of point depends on user's hobby, and it is required to make the work that meets the buyer. Point 21 can be aligned, and the interval between point and the consecutive points better is about 1.5-4 centimetre. What the technology skilful person of this area should understand is to look specific application, also can use the point of other shape. Place the polymer sheet that discharges pesticide near the local of wooden structure or around it, locate, produce a shallow trench isolation to discharge pesticide by control.

The second control of the present invention discharges example also to be used for the polymer of controlling pesticide release-carrier conveying system, and it comprises the physics fusible mixture of spunbond polymer sheet 20 and polymer and pesticide. With the same in first example, polymer sheet 20 can be to weave or non-woven polypropylene, the physics fusible that bonds thereon mixture (being illustrated as bar 22 in Fig. 2). Similarly, used polymer and pesticide also can be used in the described example of this part in above-mentioned first example.

Can use in addition the extruder system that can form bar (as shown in Figure 2) that the mixture of the polymer in second example and pesticide is placed on the spunbond polymer sheet. The height of bar 22 can be about 1 centimetre, and the interval is about 5-15 centimetre. Bar is preferably answered about 10 centimetres of interval. Hope is configured as such structure with bar, namely can keep the pesticide of Css after the initial suddenly release of pesticide in shallow trench isolation. After being applied to bar on the polymer sheet, place on the wooden structure this sheet or the place of close wooden structure, avoid the infringement of insect to protect it.

In all examples of the present invention, also can comprise bonding filler and/or carrier. Comprise bonding filler and/or carrier and for given release speed, can discharge relatively large pesticide, or for the pesticide of specified rate, can discharge with lower release speed. Bonding carrier bonding pesticide. The bonding carrier that is used for the bonding pesticide comprises the carbon back carrier, such as carbon black, active carbon and their mixture. Think the similar biologically active chemical substance that can be used for boning of aluminium oxide, alumino-silicate (silicoaluminate), hydroxyapatite and their mixture and carbon.

When using the carbon back carrier, the first step is to guarantee the drying of carbon, subsequently liquid insecticide is mixed with carbon. Only use enough carbon blacks (filler) to make friable mixture. Term " frangible " refers to that basically do or not sticking flowable particle. Some pesticide must heat to become liquid state. The liquid pesticide is bonding or be bonded on the very large surface of tiny disperse black carbon, and cooling mixture is in order to be blended into it in polymer. Operable polymer is polyethylene, polypropylene, polyethylene and polyacrylic copolymer or blend, polybutene, epoxy polymer, polyamide, Acrylate-styrene bipolymer-acrylonitrile copolymer, aromatics or unsaturated polyester (UP), polyurethane, polysiloxanes or their any other suitable polymer or copolymer in carbon is used.

Carbon in first and second example-pesticide mixture (if or do not use carbon, only be pesticide) then with the polymer of melting, powder or liquid condition, better be that polyurethane mixes. Then this mixture is bonded on the polymer sheet. In first and second example of the present invention, polymer and pesticide are melt-adhesion on the polymer sheet.

The another kind of mode that the mixture of polymer and pesticide is bonded on the polymer sheet is that it is a kind of technology known in the art by " running through injection moulding (through-injection molding) ". In " running through injection moulding ", the melting material is injected into the mould by porous web from hot nozzle. The melting material flows through net under pressurization, and solidifies in mould. When injection moulding melting material, porous web is by air dissipation, but it depresses the material that also keeps melting adding, until its cooling.

It is that molten mixture with polymer and pesticide is placed on the spunbond polymer sheet that the mixture of polymer and pesticide is bonded to a kind of diverse ways on the polymer sheet. If mixture is melting, then must make its cooling, solidify and solidify. Hereinafter used " molten mixture of polymer and pesticide " refer to polymer be fusing or be in liquid condition. Depending on its fusing point, pesticide also can be the fusing or be included in the slurry soln. " polymer is with the molten mixture of pesticide " also can comprise carbon or not melt but other additive of flowing with the melting material of polymer/pesticide.

First and second example of the present invention should provide the release speed of the insecticide concentration that is enough to remain valid in shallow trench isolation, killing or to remove insect, but this speed is again enough slowly, with the concentration of remaining valid for a long time.

Generally speaking, the better composition in the present invention first and second example comprises the carrier polymer of about 70-95 weight portion, the carbon of about 0-15 weight portion, the insecticide of about 5-30 weight portion.The sustained release parts are carried out aspect that designing institute will consider to be looked such as user's hobby and the factor the geographical conditions and becomes.Polymer transport system in these two examples can keep 6 years at least at the rate of release that initial insecticide discharges its stable state of back suddenly, with as the barrier film to insect such as ant and termite.Yet, can easily regulate equilibrium concentration in this example to meet each user's specific (special) requirements.

Example shown in Fig. 1-5 can randomly comprise not the sheet (not shown) of saturating insecticide as metallized paper tinsel.Metallized paper tinsel or polymer-extruded are laminated on the surface of spunbond polymer sheet, with flowing of guiding insecticide.

Another example of the present invention is a kind of barrier film that does not allow the sheet that insect passes through, and wherein the bonding friable mixture with biologically active chemical substance or insecticide and carbon carrier is placed in the polymer, and this mixture is gone up not delivery of biologically active chemical substance substantially.Basically do not discharge and be defined as rate of release less than 0.4 μ g/cm ²/ day, better less than 0.1 μ g/cm ²/ day, preferably less than 0.05 μ g/cm ²/ day.This example comprises that rate of release is 0.0 or is lower than detectable limit value.In this example, prevent insect by " absorption " or " scraping " polymer surfaces and the existence that detects the biologically active chemical substance of harmful insect.The life-span on the barrier film that the life-span on barrier film is more higher than rate of release is much longer.And breaking or tearing not too of polymer is easy to " seepage " biologically active chemical substance.Therefore, the two-layer or multilayer in this example suits to keeping complete barrier performance.Multilayer can produce in one deck and tear or hole, but insect not can by the second layer or thereafter do not tear layer.Can on one or two surface on barrier film, place protective layer further, tear avoiding as scrim.

Finish in case make, the polymer-carrier delivery system of first and second example is placed near the structure place that wishes to avoid insect infestations.Fig. 3-5 has illustrated the various modes that apply of point-like of the present invention or strip-shaped blade example.The structure of Fig. 1 is shown among Fig. 3-5, but what should understand is that Fig. 2 constructs or other structure also can use well.

In Fig. 3, polymer-carrier delivery system 1 is placed concrete foundation 23 following and its next doors of the wooden structures 100 of generation shallow trench isolation 10, avoid the infringement of termite, ant and other moth to protect this structure.

In Fig. 4, with polymer-carrier delivery system 2 place structural detail 24 as the following of porch, courtyard, pavement or place wooden structures 101 next doors the bottom ground below, to form shallow trench isolation 10.

In Fig. 5, polymer-carrier delivery system 3 is placed wooden structures 102 concrete foundation 23 top and its side but place this structure wooden part 25 below, to produce shallow trench isolation.

Another example of the present invention is shown in Fig. 6 and 7.This example relates separately to extrusion shown in Fig. 6 and 7 as pushing pliable and tough cylinder 26 and the pliable and tough flat rubber belting 27 of extruding.Can use various polymer, described polymer can be divided into four class groups.Described group comprises thermoplastic polymer, thermosetting polymer, elastomer polymer and above-mentioned three groups copolymer.As an example, operable some polymer that is selected from four groups is: high density polyethylene (HDPE), low density polyethylene (LDPE), EVA, polyvinyl acetate, urethane polymer, polyester, santoprene, polysiloxanes, neoprene and polyisoprene.Insecticide is a chlopyrifos preferably, although above-mentioned insecticide also can use.Also can use filler.

Cylindrical size better is that its diameter is about the 5-15 millimeter, but insecticide preferably is about 10 millimeters with best steady state release its diameter to the shallow trench isolation.The thickness of flat rubber belting better is about the 1-6 millimeter, and width better is about the 5-15 millimeter.Yet, it should be noted cylinder and flat rubber belting to be made and satisfy the various conditions that the user runs into.

Generally speaking, in order to keep the equilibrium concentration of insecticide for a long time in shallow trench isolation, the composition in this example of the present invention should comprise the polymer of about 70-95 weight portion, the insecticide of the carbon of about 0-30 weight portion and about 5-30 weight portion.Yet the composition that can regulate extrusion is to satisfy user's specific (special) requirements.Estimation can keep shallow trench isolation 6 years concerning flat rubber belting concerning cylinder equally at least.

Extrusion can be placed on all places to produce shallow trench isolation.Fig. 8 has illustrated the mode of using extrusion shown in Figure 6.One or more pliable and tough cylinders 26 are placed between the concrete foundation 23 ' and wooden part 25 ' of structure.Pliable and tough cylinder 26 discharges insecticide with controlled velocity, to produce shallow trench isolation.An advantage of this structure be pliable and tough cylinder 26 can be placed on the structure of having built below.Similarly, can be with opposite with horizontal direction in a way not illustrated being placed vertically in the soil of pliable and tough cylinder.The technology skilful person of this area will be appreciated that, looks specific the factor that use is considered, extrusion can have other suitable shape and place on any suitable position.

Fig. 9 has illustrated the mode of using pliable and tough flat rubber belting extrusion shown in Figure 7.By between the concrete foundation 23 " and wooden part 25 " that one or more pliable and tough flat rubber beltings 27 is placed structure or be placed on its next door, just can produce shallow trench isolation.In an example, pliable and tough flat rubber belting 27 also can be placed vertically the next door at wall, and this situation does not illustrate in the accompanying drawings.Equally, think flat rubber belting any suitable placement location all within the scope of the invention.

The pill of use Figure 10-13 example illustrated also can reach the sustained release to insecticide usually.Pill 13 comprises polymer, insecticide and better also comprises filler.Can use various polymer in this example.They can comprise four base polymers of being made up of thermoplastic polymer, thermosetting polymer, elastomer polymer and its copolymer.From this four class, come selective polymer to depend on the factor that designing institute is considered, and the better polymerization thing is high density polyethylene (HDPE) or low density polyethylene (LDPE).In addition, insecticide should comprise tefluthrin, but also can use following insecticide: isofenphos, sumicidin, cypermethrin, permethrin and other pyrethrins.In order to reach optimum, also carrier such as carbon can be added in the mixture.

Pill 31 discharges insecticide with controlled velocity for a long time, to set up shallow trench isolation.The composition of the pill that the shallow trench isolation in this maintenance soil is required is the polymer of about 70-95 weight portion, the insecticide of the carbon black of about 0-30 weight portion and about 5-30 weight portion.The composition of pill finally depends on user's preference.

Look required application, pill can be any suitable size, and for example its diameter (if or rectangle, its width and thickness) is the 1-25 millimeter, and its length is 2-20 centimetre or longer.And, in order to adapt to specific user's demand, can easily regulate the size of pill and the concentration of insecticide.Yet shallow trench isolation can keep 6 years at least.

In addition, pill 31 also has the advantage that can easily they be placed Anywhere.The pill of this example of the present invention is shown among Figure 10.The place that pill 31 inserts near wooden structures 25.Produce around pill shown in Figure 10 can be placed on cement ground 23 ' " below, perhaps they can directly be placed on following (not shown) of wooden structures, so that at wooden structures 25 ' " zone 10 get rid of can this structure of infringement insect.Figure 11 has illustrated the cross-sectional view that is embedded in the pill 31 on the surface 40.

Can easily pill be used in the various uses.Figure 12 has illustrated pill has been sprayed 50 to concrete structural surface 40.Figure 15 has illustrated pill 33 has been placed on treatment surface on the prefabricated board 300.

As shown in figure 13, with foams 41 pill 32 is applied to surface 40 as on soil or the concrete.At first pill is added in the foams by manner known in the art.The foams 41 that will contain tiny pill then spray 50 to surface 41 with power spraye 70 as shown in figure 12, so that be formed for the protective layer on surface.Then pill 32 discharges insecticide, produces a protective barrier layer in soil, avoids the invasion and attack of insect with protection timber.In order to reach optimum, foams 50 are made up of polyurethane.Also can use polysiloxanes, polyester or polyvinyl acetate.The desired concn of insecticide in the big or small visual foam thickness of pill 32 and the shallow trench isolation and becoming.The thickness that is applied to lip-deep foams can become by user's preference.Shallow trench isolation can keep 6 years at least.Except as the carrier of insecticide, foams also can curing cement and as insulator.

As shown in figure 14, also can use contain embed pill 33 prefabricated board as an example of the present invention.This plate 300 can be made by the material of any kind that is fit to fixed pellets 33.This plate is that the foamed polystyrene of Dow is formed by registration mark better.Can any variety of way apply plate, and it also can be used as insulating element and operates.A kind ofly apply mode as shown in figure 15, the plate 300 that wherein will contain pill 33 places on the concrete surface 42.The pill that embeds separates regularly, and it is determined by the consumption of required insecticide at interval.

In another example shown in Figure 16 and 17, can apply the sustained release parts that comprise polymeric matrix and insecticide by hot melt.Design the needs that this example satisfies the structure that has been in place.As mentioned above, polymeric matrix can comprise any in above-mentioned four base polymers.Similarly, can use any in the above-mentioned insecticide.Yet, should use the high density or the low density polyethylene (LDPE) that contain pyrethrins.Although satisfy user's demand, in order to reach optimum, the concentration of each material should be in hot melt applies, the about 70-95 of polymer, the about 5-30 of insecticide, and the about 0-30 of filler/carrier.

Figure 16 has illustrated the soil that hot melt 50 is injected near concrete foundation 43 with syringe 400.Xoncrete structure 43 supporting wooden structures 250.Figure 17 has illustrated the interval between the hot melt 50 that injects the soil.

In another example, Figure 18 and 19 has illustrated that use of insecticide fumigates structure 500.By the sustained release parts being injected or be placed on structure that can be fumigated or near its place, the insecticide that discharges can evaporate to fumigate structure from the sustained release parts.Figure 18 has illustrated and has used the connector 34 stifling structures of being made by building block 502 500.Similarly, Figure 19 has illustrated the method that applies the sustained release parts with drilling machine 800 drilling bore hole 700 on cement plate 900.In case insert, connector can be fumigated structure.

Example preferably at present

The device of the present invention that is shown in Figure 20 at present preferably example will contain the low-vapor pressure insecticide in or first kind of polymer 200 of high density polymer with contain than high volatile volatile, promptly second of the insecticide of higher vapor pressure kind of polymer 202 combined.The degree of cross linking in the reference polymer, high, in and low-density be the well-known term of polymer arts.High vapour pressure is defined as vapour pressure and surpasses about 1 milli Pascal, better about 10-100 milli Pascal.Low-vapor pressure is defined as less than 1 milli Pascal, better about 0.05-0.5 milli Pascal.The thickness of first kind of polymer 200 better is about the 1/32-1/8 inch.The insecticide of low-vapor pressure better is permethrin or cyhalothrin.The appropriate materials of first kind of polymer 200 is selected from polyurethane, high density polyethylene (HDPE) and polypropylene.Second kind of polymer 202 is placed on place near first kind of polymer 200, better is to be connected on first kind of polymer 200.First kind of polymer 200 better is waterproof and saturating radon gas not.Therefore, first kind of polymer 200 better is a kind of, and it can be a film or spunbond.By the present invention, first kind of polymer 200 can be two inferior parts (sub-parts), and inferior part 204 is to contain among low-vapor pressure insecticide permeable or high density polymer, and another inferior part 206 is the impermeable layers that do not contain insecticide.Impermeable layer has preventing or reduces the advantage of the disposal that setter and biologically active chemical substance run into/contact.Impermeable layer for example can be polyester film, polyvinylidene chloride fiber or saranax.

Second kind of polymer 202 is a kind of low-density polymerics, better is vinyl-vinyl acetate copolymer, low density polyethylene (LDPE) or its blend.Placing the insecticide than high volatile volatile or higher vapor pressure of second kind of polymer better is synthetic pyrethroid, as tefluthrin.

Second kind of polymer 202 can be the form of aforementioned pill, first kind and second kind of polymer are positioned to first kind of polymer below the ground substrate plate, and second kind of polymer scatters in the soil near ground.Second kind of polymer 202 is more preferably weaving or the form of non-woven perforate grid as shown in the figure.Grid hole can be to feel the size that is not closed to about 1-4 inch grid, and rib 208 has the cross section that width is about 1 mil to 1/8 inch.The scrim of being made by polyethylene, polypropylene or polyester can be used as grid.For 200 in first kind of polymer and second kind of polymer 202 perforate grid, the device that is combined by first kind and second kind of polymer 200,202 better is to place below ground.First kind of polymer sheet 200 places the place near second kind of polymer 202 perforate grid, and 200 in first kind of polymer contacts with ground 43 or close ground 43 and between ground and second kind of polymer 202 perforate grid.Grid material can the organism-absorbing active chemistry and as the reservoir of biologically active chemical substance.

In operating process, first kind of polymer 200 continues as the physical/chemical barrier film that prevents that insect from invading.Yet, because the slow release of first kind of polymer 200 only discharges considerably less insecticide in about year and is used to produce shallow trench isolation after installation.In addition, because such as the running through and in building course, puncture or tear of electric wire and pipeline, so also flawless barrier film can not be set.Therefore, second kind of polymer 202 is set,, thereby prevents that insect from entering the defectiveness part by first kind of polymer 200 so that after arrangement, produce shallow trench isolation in several days.Therefore, first kind of polymer 200 has following three kinds of functions: insect barrier film, steam/moisture barrier and radon gas barrier film.First kind of polymer 200 is designed to and can continues at least 10 years, better met and exceeded 20 years.Second kind of polymer 202 is designed to and can continues at least 5 years, better reach about 10 years.Second kind of polymer 202 exhaust and the anti-insect in no longer valid ground in, first kind of polymer 200 reaches the concentration of the release insecticide that is enough to keep shallow trench isolation.

Provide following embodiment to illustrate as an example.Similarly, these embodiment are not counted as the restriction of the scope of the invention that appended claims is limited.

Embodiment 1

Test to determine the rate of release of chlopyrifos.Look polymer, the load factor of insecticide is 5 weight % or 10 weight %.In the time of 50 ℃, determine the rate of release of all parts.

The polymer of being estimated comprises that the eutectic polyethylene of eutectic polyethylene, polyurethane, two polyepoxides (two epoxies), silicon rubber and the high content of wax is to reduce the thermolysis of chlopyrifos.Studies show that excessive thermolysis can take place chlopyrifos when temperature surpasses about 240 ℃; Like this, the selection of polymer just is limited in does not need excessive hot worked prescription.

Table 1 provides the summary of these results of study.Generally speaking, with the chlopyrifos compatible polymers problem relevant with used load factor can not appear.Yet, can lose some integrality physically when using polyether polyols with reduced unsaturation, and other polymeric acceptor does not have visible degraded when tying up to 50 ℃.Rate of release is from 10 μ g/cm of silicon rubber ²/ sky is to the 0.3 μ g/cm of epoxy B ²/ day.

The data that use table 1 provides can have the life of product of an estimation approx.The weight of supposing parts is 0.5 gram, and its load is 10%, therefore has 50 milligrams of chlopyrifos to can be used for discharging.Like this, be 4cm for area ²Polymeric system, rate of release is 1 μ g/cm ²/ day, this just makes insecticide be enough to keep under the rising temperature 30 years.These calculating show that various pesticide products all are utilizable.

The rate of release of the selective system of table 1. polymer formulators and use chlopyrifos

Type of polymer	The content of chlopyrifos (%)	Rate of release (μ g/cm ²/ day) ^a
Type of polymer	The content of chlopyrifos (%)	Rate of release (μ g/cm ²/ day) ^a	Polyurethane	????5	????2．1±1．4 ^b
Epoxy A	????5	????<0．1	Polyurethane	????5	????2．1±1．4 ^b
Epoxy A	????5	????<0．1	Polysiloxanes	????5	????10．3±3．5
Polyurethane	????10	????1．0±0．3	Polysiloxanes	????5	????10．3±3．5
Polyurethane	????10	????1．0±0．3	Epoxy B	????10	????0．3±0．1
PE+ wax	????10	????1．9±0．3	Epoxy B	????10	????0．3±0．1

^aThe rate of release of in the time of 50 ℃, measuring ^bExcessively cracking embodiment 2 appears in material under the rising temperature

With embodiment 1 similar polymeric system, but study with 80% pure pyrethrins.Rate of release in the time of 40 ℃ is listed in the table 2.

The rate of release of the selective system of table 2. polymer formulators and use pyrethrins I

Type of polymer	The content of pyrethrins I (%)	Rate of release (μ g/cm ²/ day) ^a
Type of polymer	The content of pyrethrins I (%)	Rate of release (μ g/cm ²/ day) ^a	Epoxy A	????10	????0．5+0．2
Polysiloxanes	????10	????21．2+5．4	Epoxy A	????10	????0．5+0．2

Polyurethane	10	15.7±7.1
Epoxy B	10	0.2±0.1

^aThe rate of release of in the time of 40 ℃, measuring

The rate of release of polyurethane and polysiloxanes is the highest, and the rate of release of polyepoxide is minimum.Obvious variation is arranged on rate of release, and estimation will need suitable bonding.

Simply calculate the probable life that just can determine the insecticide system from the data that table 2 is listed.As described in embodiment 1, there are many variablees can change the life-span of shallow trench isolation.

Embodiment 3

The production control releasing parts is tested to determine their rate of release it.Absorb the carbon black of liquid pesticide and the polymer of 83-87 weight % is prepared all thermoplastic polymers with the insecticide of 10 weight %, 3 or 7 weight %, with its injection moulding into about 1/8 inch thick thin slice.Specifically, the parts of being made by thermoplastic polymer and decis and cyhalothrin contain 3% carbon black.The parts of being made by remaining insecticide and thermoplastic polymer contain 7% carbon black.

Make from the polymeric blends that contains 60 weight %S-113,40 weight % castor oil and 5 weight %TIPA catalyzer by the parts that S-113 polyurethane (a kind of thermosetting polymer) is made.Polymeric blends accounts for 90% of part total weight.Insecticide, promptly decis accounts for parts remaining 10%.In these parts, do not use carbon black.Polymer/insecticidal compositions casting is become 1/8 inch thick sheet, and heating is about 40-60 minute in the time of about 60 ℃, to solidify the casting sheet.

Downcut 1 inch square then from the thin slice of injection moulding or casting, test the rate of release of this square block.Obtain following rate of release:

Insecticide	Polymer	Rate of release
Insecticide	Polymer	Rate of release	Decis	S-113 polyurethane	25．2μg／cm ²/ day
	????Aromatic?80A	????16．8μg／cm ²/ day	Decis	S-113 polyurethane	25．2μg／cm ²/ day
	????Aromatic?80A	????16．8μg／cm ²/ day		Pellethane?2102-80A	????8．8μg／cm ²/ day
	Pellethane?2102-55D	????8．0μg／cm ²/ day		Pellethane?2102-80A	????8．8μg／cm ²/ day
	Pellethane?2102-55D	????8．0μg／cm ²/ day		Alipmtic?PS-49-100	????7．2μg／cm ²/ day

Embodiment 4

Test with the combination of determining cyhalothrin (pyrethroid) concentration and insecticide/polymer from polymer, discharging the influence of the rate of release of insecticide.Data are summarized in the table 4.

The rate of release of table 4. polymer/pyrethroid concentration combination

Polymer	The concentration of pyrethroid (weight %)	Rate of release (mg/cm ²/ day)
Polymer	The concentration of pyrethroid (weight %)	Rate of release (mg/cm ²/ day)	Ethane-acetic acid ethyenyl ester (EVA)	1	0．3
	5	2．2	Ethane-acetic acid ethyenyl ester (EVA)	1	0．3
	5	2．2		10	2．5
Polyurethane	1	0．9		10	2．5
Polyurethane	1	0．9		5	4．4

10	8．3
10	8．3	Polyurethane/EVA (50/50)	1	2．6
5	7．2	Polyurethane/EVA (50/50)	1	2．6
5	7．2		10	9．1

Embodiment 5

Test to determine the effectiveness of shallow trench isolation termite-proof.Select two class termite samples to test: Eastern subteranean termites (because its most common) and Formosan subteranean termites (because its tool invasive).

Assemble test cell with glass container.Veneer is placed on the bottom of container.With the polymer that flooded insecticide be placed on wood chip above, make top from impregnated polymer to not having passage or perforate the wood chip.Apotrophic tommy bar is placed on the top of impregnated polymer.The data on tommy bar surface are zero, and impregnated polymer is placed tommy bar lower face 5 centimeters.Termite is placed on the surface of tommy bar, advance to mark impregnated polymer by tommy bar their every days.

The combination of impregnated polymer is listed among the table 5a.

The rate of release of table 5a.10 weight % pyrethroid

Polymer	Pyrethroid	Rate of release (mg/cm ²/ day)
Polymer	Pyrethroid	Rate of release (mg/cm ²/ day)	Ethane-acetic acid ethyenyl ester	Permethrin	????3．9
Ethane-acetic acid ethyenyl ester	Tefluthrin	????4．3	Ethane-acetic acid ethyenyl ester	Permethrin	????3．9
Ethane-acetic acid ethyenyl ester	Tefluthrin	????4．3	Ethane-acetic acid ethyenyl ester	Tefluthrin (fatty acid of 2 weight %)	????3．2
Polyethylene	Permethrin	????1．4	Ethane-acetic acid ethyenyl ester	Tefluthrin (fatty acid of 2 weight %)	????3．2
Polyethylene	Permethrin	????1．4	Polyethylene	Tefluthrin	????2．2
Polyethylene	Tefluthrin (fatty acid of 2 weight %)	????2．0	Polyethylene	Tefluthrin	????2．2

Also use in polymer barrier layer, do not have pyrethroid with reference to sample.The results are shown in Figure 21 and 22.All with reference to sample in, termite gnaws to bite by polymer and enters in the wood chip.Pass through poly slow by the velocity ratio of ethane-acetic acid ethyenyl ester.For all impregnated polymer, all do not pass.Because the Formosan subteranean termites is tool invasive like this, so compare their more close impregnated polymer with the less Eastern subteranean termites of invasive.In fact, the polyethylene that contains permethrin can be subjected to the scabbing that Formosan termite maxilla bites and stays, but does not have hole or penetrate.Approximately after 12-14 days,, and under the effect of impregnated polymer, withdraw even the Formosan termite is also owing to the insecticide that is discharged is repelled.Embodiment 6

Test to confirm of the influence of bonding carrier rate of release.The active chemistry amount of being is tefluthrin and the cyhalothrin of 5 weight %, and the bonding carrier amount of being is the carbon black of 0 weight % and 10 weight %, and the high density polyethylene (HDPE) of surplus (MA 778-000).Measure rate of release after manufacturing during 6 weeks, jede Woche wipe samples wherein is to remove the active chemistry that discharges of surface accumulation.

The results are shown in Table 6.

The rate of release of table 6-0 weight % and 10 weight % carbon blacks

Active chemistry	Carbon black (weight %)	Rate of release (μ g/cm ²/ day)
Tefluthrin	0	3．13
Tefluthrin	10	0．71
Cyhalothrin	0	1．78
Cyhalothrin	10	0．81
Cyhalothrin	20	0．61

Conclusion

The technology skilful person of this area can determine principal character of the present invention at an easy rate from foregoing description, and can make changes and improvements to it under situation without departing from the spirit and scope of the present invention, so that it adapts to various application and condition.Want to be noted that the scope of the present invention that is limited by following claims comprises is used to limit all equivalents of the present invention.

Claims

Modification according to the 19th of treaty

1. barrier film that prevents wood pest access to wooden structures, it comprises:

(a) insecticide, it is in following (b)

(b) polymeric matrix; Wherein

(c) amount of described insecticide can be bonded in the polymer for making it, and described amount is enough to prevent that described wood borers from destroying described barrier film.

2. barrier film as claimed in claim 1, wherein said insecticide can not discharge from described barrier film in large quantities.

3. as the described barrier film of above-mentioned each claim, wherein said insecticide and carrier are mixed into the bonding friable mixture, and this mixture is added in the described polymer.

4. as the described barrier film of above-mentioned each claim, wherein said insecticide is the insecticide of low volatility, and described polymer is high or middle density polymers.

5. as the described barrier film of above-mentioned each claim, it also is included in the another kind of insecticide in the another kind of polymer, and described another kind of insecticide is the high volatile volatile insecticide, and described another kind of polymer is a low-density polymeric.

6. barrier film as claimed in claim 4, wherein said low volatility insecticide is selected from cyhalothrin, permethrin and their mixture.

7. barrier film as claimed in claim 4, wherein said height or middle density polymers are selected from polyurethane, high density polyethylene (HDPE) and their mixture.

8. as the described barrier film of above-mentioned each claim, the amount of wherein said insecticide is at least 1 weight %.

9. barrier film as claimed in claim 8, the amount of wherein said insecticide are at least 5 weight %.

10. barrier film as claimed in claim 3, wherein carrier is selected from carbon black, active carbon and their mixture.

11. as the described barrier film of above-mentioned each claim, wherein said insecticide is selected from isofenphos, sumicidin, cypermethrin, permethrin, pyrethrins and their mixture.

12. a manufacturing prevents the method on the barrier film of wood pest access to wooden structures, it comprises the steps:

(a) select a certain amount insecticide and

(b) insecticide with described amount is bonded in the polymeric matrix; Wherein

(c) described amount is enough to prevent that described wood borers from destroying described barrier film.

13. method as claimed in claim 12, wherein said insecticide can not discharge from polymer in large quantities.

14. as each described method in the claim 12 to 13, wherein bonding comprises the steps:

Described insecticide and carrier are mixed into the bonding friable mixture; With

The friable mixture that will bond is added in the polymer.

15. as each described method in the claim 12 to 14, wherein said insecticide is the insecticide of low volatility, and described polymer is high or middle density polymers.

16. as each described method in the claim 12 to 15, it also comprises the steps:

Another kind of insecticide is sneaked in the another kind of polymer, and described another kind of insecticide is the high volatile volatile insecticide, and described another kind of polymer is a low-density polymeric.

17. method as claimed in claim 13, wherein said low volatility insecticide is selected from cyhalothrin, permethrin and their mixture.

18. method as claimed in claim 15, wherein said height or middle density polymers are selected from polyurethane, high density polyethylene (HDPE) and their mixture.

19. as each described method in the claim 12 to 18, the amount of wherein said insecticide is at least 1 weight %.

20. method as claimed in claim 19, the amount of wherein said insecticide are at least 5 weight %.

21. method as claimed in claim 14, wherein carrier is selected from carbon black, active carbon and their mixture.

22. as each described method in the claim 12 to 21, wherein insecticide is selected from isofenphos, sumicidin, cypermethrin, permethrin, pyrethrins and their mixture.

23. make the barrier film to prevent to creep or autochthonal insect enters for a certain area or structure provide long-term protection to prevent the method for described insect pest infestation for one kind, described method comprises the steps:

(a) place the sustained release barrier film in the porch of described area or structure, described barrier film has outer surface and contains polymeric matrix and the insecticide in described matrix;

(b) allow insecticide be discharged on the outer surface on sustained release barrier film and accumulate on described surface, the rate of release of insecticide is at least 10 μ g/cm ²/ day, described speed is enough to remove or kill the insect that contacts with barrier layer surface, creeps or the infringement of autochthonal insect thereby protect described area or described structure to avoid described.

24. method as claimed in claim 23, wherein said creep or autochthonal insect is selected from insect, snake and their combination.

25. as each described method in the claim 23 to 24, wherein polymeric matrix is selected from polysiloxanes, EVA, urethane polymer, polyurethane, acrylonitrile, butadiene, acrylic rubber, isoprene and styrene-ethylene base rubber.

26. as each described method in the claim 23 to 25, wherein polymeric matrix also comprises the carrier that is used for sustained release speed.

27. method as claimed in claim 26, wherein said carrier are selected from carbon black, active carbon, amorphous silicas and their mixture.

28. as each described method in the claim 23 to 27, wherein said sustained release parts are forms of sheet or pill.

29. method as claimed in claim 26, wherein the concentration of carrier is about 2-7% of described barrier film gross weight.

30. as each described method in the claim 23 to 29, wherein the concentration of insecticide is about 2-15% of barrier film gross weight.

31. as each described method in the claim 23 to 30, wherein insecticide is selected from decis, cypermethrin, cyhalothrin, tefluthrin, permethrin and their mixture.

Claims

(a) insecticide, it is in following (b)

(b) polymeric matrix; Wherein

(c) amount of described insecticide can discharge from polymer in large quantities for it can be bonded in the polymer and not, and described amount is enough to prevent that described wood borers from destroying described barrier film.

2. barrier film as claimed in claim 1, wherein said insecticide and carrier are mixed into the bonding friable mixture, and this mixture is added in the described polymer.

3. barrier film as claimed in claim 1, wherein said insecticide are the insecticides of low volatility, and described polymer is high or middle density polymers.

4. barrier film as claimed in claim 3, it also is included in the another kind of insecticide in the another kind of polymer, and described another kind of insecticide is the high volatile volatile insecticide, and described another kind of polymer is a low-density polymeric.

5. barrier film as claimed in claim 3, wherein said low volatility insecticide is selected from cyhalothrin, permethrin and their mixture.

6. barrier film as claimed in claim 3, wherein said height or middle density polymers are selected from polyurethane, high density polyethylene (HDPE) and their mixture.

7. barrier film as claimed in claim 1, the amount of wherein said insecticide are at least 1 weight %.

8. barrier film as claimed in claim 7, the amount of wherein said insecticide are at least 5 weight %.

9. barrier film as claimed in claim 2, wherein carrier is selected from carbon black, active carbon and their mixture.

10. barrier film as claimed in claim 1, wherein said insecticide are selected from isofenphos, sumicidin, cypermethrin, permethrin, pyrethrins and their mixture.

11. a manufacturing prevents the method on the barrier film of wood pest access to wooden structures, it comprises the steps:

(a) select a certain amount insecticide and

(c) insecticide of described amount is bonded in the polymer and can discharge from polymer in large quantities, and described amount is enough to prevent that described wood borers from destroying described barrier film.

12. method as claimed in claim 11, wherein bonding comprises the steps:

Described insecticide and carrier are mixed into the bonding friable mixture: and

The friable mixture that will bond is added in the polymer.

13. method as claimed in claim 11, wherein said insecticide are the insecticides of low volatility, and described polymer is high or middle density polymers.

14. method as claimed in claim 13, it also comprises the steps:

15. method as claimed in claim 13, wherein said low volatility insecticide is selected from cyhalothrin, permethrin and their mixture.

16. method as claimed in claim 13, wherein said height or middle density polymers are selected from polyurethane, high density polyethylene (HDPE) and their mixture.

17. method as claimed in claim 11, the amount of wherein said insecticide are at least 1 weight %.

18. method as claimed in claim 17, the amount of wherein said insecticide are at least 5 weight %.

19. method as claimed in claim 12, wherein carrier is selected from carbon black, active carbon and their mixture.

20. method as claimed in claim 11, wherein said insecticide are selected from isofenphos, sumicidin, cypermethrin, permethrin, pyrethrins and their mixture.

21. one kind for a certain area or structure provide the method for long-term protection to prevent that insect from invading, described method comprises the steps:

(a) place sustained release parts in the porch of area that needs protection or structure with outer surface, described parts comprise polymeric matrix and the insecticide in described matrix, and described insecticide is selected from decis, cypermethrin, cyhalothrin, tefluthrin, permethrin, isofenphos, sumicidin, pyrethrins and their mixture;

(b) allow insecticide be discharged on the outer surface of sustained release parts and accumulate in its surface, the rate of release of insecticide is at least 10 μ g/cm ²/ day, described speed is enough to remove or kill the insect that contacts with parts surface.

22. method as claimed in claim 21, wherein said insect are selected from insect, snake and their combination.

23. method as claimed in claim 21, wherein polymeric matrix is selected from polysiloxanes, EVA, urethane polymer, polyurethane, acrylonitrile, butadiene, acrylic rubber, isoprene and styrene-ethylene base rubber.

24. method as claimed in claim 23, it also comprises the bonding carrier.

25. method as claimed in claim 24, wherein said bonding carrier is selected from carbon black, active carbon and their mixture.

26. method as claimed in claim 21, wherein said sustained release parts are forms of sheet or pill.