JP2010121349A - Insect control heat insulator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an insect control heat insulator which can securely prevent eating damage over the long run caused by vermin which can often be seen in a barn and which can eliminate time and manpower required for the processing of a header surface when on-site construction is performed. <P>SOLUTION: The insect control heat insulator is made of synthetic resin-made foam which contains permethrin, a synergist and a repellent, and the concentration of permethrin contained in the synthetic resin-made foam is 0.1 to 3 wt.%. At this time, it is preferable that the synthetic resin-made foam be hard polyurethane foam. It is more preferable that the synthetic resin-made foam be constituted by a plurality of layers, and that the content concentration of permethrin of each layer be different. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an insect-insulating heat insulating material made of a synthetic resin foam, and in particular, an insect-insulating heat insulating material that is used in livestock houses such as poultry houses, pig houses, cow houses, stables, and sheep shelters and exhibits excellent insecticidal properties over a long period of time. Regarding materials.

  In recent years, in livestock houses such as poultry houses, pig houses, cowsheds, stables, and sheepsheds, the facilities have been enlarged, integrated, and labor-saving (automated) for the purpose of improving the production efficiency of livestock products such as meat, eggs, and milk. As the breeding environment has been optimized, the windowless type, which allows easy adjustment of the environment such as ventilation, heating, and light management, is becoming more popular.

  On the other hand, there is a tendency that unpleasant insects such as the worm worm beetle are likely to occur in large quantities throughout the year, and there is a problem of eating damage to the heat insulating material made of synthetic resin foam in the barn, resulting in a significant decrease in the heat insulating effect of the foam. Has occurred. In particular, the mealworm is a pest that is often found in barns because it is most preferred to feed and flour that have been modified by moisture absorption and is also generated from chicken manure.

  Therefore, in order to protect the heat insulating material from such pests, the cut surface (small edge surface) of the heat insulating material is previously coated with a resin with hot melt, or a tape or a shield material is pasted on the small edge surface. Measures are taken to prevent insects from entering. However, it is often necessary to cut the heat insulation material according to the housing of the barn when constructing the heat insulation material on site, and in that case, it can be said that insects will invade from the newly cut facet. There wasn't.

  On the other hand, although it is possible to take countermeasures by applying resin liquid or applying tape / shielding material to the newly cut small edge surface during on-site construction, it takes extra work on the construction itself. Workability will be greatly reduced. In addition, even when the above-described measures are taken, there are cases in which insects invade from holes generated when, for example, chickens raised in a poultry house poke the heat insulating material.

  In this way, it is difficult to completely protect the heat insulating material made of synthetic resin foam from pests such as mussel, etc. by processing such as resin application to the small edge and tape / shielding material sticking. Development of a method was desired.

  Until now, as a method for imparting insecticidal performance to a heat insulating material made of a synthetic resin foam, a pyrethroid compound such as permethrin (Patent Document 1) or an insecticide having a melting point of 35 to 150 ° C. (Patent Document) Insect repellents containing 2) have been proposed. However, in these previously proposed insect-insulating insulations, although the prevention effect of white ants is mentioned, the examination of the damage caused by the insects often seen in the barns represented by the above-mentioned barley beetle has been sufficiently made. Absent.

Japanese Patent No. 3275008 JP 2008-88807 A

  In consideration of the present situation as described above, the present invention provides an insect-proof heat insulating material that can reliably prevent the damage caused by pests often seen in barns over a long period of time, and eliminates the trouble of small surface treatment during construction on site. This is the issue.

  In order to solve the above-mentioned problems, the present inventors focused on a conventionally known technique of mixing an insect repellent into a heat insulating material itself made of a synthetic resin foam, and as a result of repeated studies, as a result, in the synthetic resin foam, It contains permethrin [3-phenoxybenzyl-3- (2,2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate], a synergist and a repellent, and the permethrin concentration in the synthetic resin foam. It has been found that, by optimizing, an insect-insulating material that exhibits an excellent insect-repellent effect over a long period of time against insect pests often found in barns such as mussel worms.

  As a result of further investigation under this knowledge, the present inventors made the above synthetic resin foam into a plurality of layers and changed the permethrin content concentration in each layer, so that not only the safety but also the insect repellent performance and its It has been found that even the sustained release can be improved.

The present invention was made on the basis of these findings, is an insect-proof heat insulating material made of synthetic resin foam, and contains permethrin, a synergist and a repellent in the synthetic resin foam, The gist is an insect-insulating material having a permethrin concentration of 0.1 to 3% by weight contained in a synthetic resin foam.
At this time, the synthetic resin foam may be a rigid polyurethane foam, and the synthetic resin foam is preferably composed of a plurality of layers, and the concentration of permethrin contained in each layer is preferably different.

  The insect-proof heat insulating material of the present invention comprises a synthetic resin foam such as polyurethane foam, urethane-modified isocyanurate foam, urea foam, polystyrene foam, polyphenol foam, and the like. Among these, a rigid polyurethane foam is preferable.

  The insect-proof heat insulating material of the present invention contains permethrin, a synergist, and a repellent in such a synthetic resin foam, and the concentration of permethrin contained in the synthetic resin foam is 0.1 to 0.1. It is important that it be 3% by weight.

  If the concentration of permethrin contained in the synthetic resin foam is less than 0.1% by weight, we will prevent long-term damage to heat insulation from unpleasant insects that live in comfortable livestock barns and have strong fertility and resistance. This makes it difficult to achieve the desired insect repellent effect. Further, even if the permethrin concentration is more than 3% by weight, the insect-repellent effect is saturated and wasteful in terms of cost, and it is not preferable from the viewpoint of safety regarding livestock and livestock products, so the concentration of permethrin is within the above range. And 0.15 to 0.2% by weight is preferable.

  In addition, the synergist contained in the synthetic resin foam of the present invention can synergistically enhance the medicinal effects on pests often found in barns such as mussel beetle by using in combination with permethrin. It is. And it is preferable to contain this synergist 0.3 to 15weight% in the synthetic resin foam. When the content of the synergist is less than 0.3% by weight, a synergistic effect with permethrin is difficult to obtain, and when it exceeds 15% by weight, it is not preferable from the viewpoint of safety regarding livestock and livestock products.

Examples of the synergist include PBO (piperonyl butoxide) [(3,4- (methylenedioxy) -6-propylbenzyl) butyldiethylene glycol ether], S-421 (common name) [octachlorodipropyl ether], IBTE ( Common names) [isobornyl thiocyanoethyl ether], polyoxypropylene monobutyl ether, fenitrothion, and the like. These may be used alone or in combination of two or more.
Among them, PBO that works synergistically and well against pests often found in barns such as mussel worms is preferred when used in combination with permethrin.

  Moreover, the repellent contained in the synthetic resin foam of the present invention expresses the effect that the insect pests often found in the barns hate and do not approach. And it is preferable to contain this repellent 0.1 to 3weight% in a synthetic resin foam. When the content of the repellent is less than 0.1% by weight, there is a possibility that “scratch marks” may occur in the heat insulating material even if “perforation” does not occur due to pests often found in barns. On the other hand, if it exceeds 3% by weight, the repellent effect is saturated, and it is not preferable from the viewpoint of safety regarding livestock and other livestock products.

Examples of the repellent include dibutyl succinate, N-octylbicycloheptene dicarboximide (trade name “Sinepirin 222” manufactured by API Corporation), N- (2-ethylhexyl) -1-isopropyl-4-methyl Bicyclo [2,2,2] oct-5-ene-2,3-carboximide (trade name “Sinepirin 500”, etc., manufactured by API Corporation), diethyltoluamide and the like can be mentioned. More than one species may be used in combination.
Of these, dibutyl succinate is preferred because of its high repellent effect on the aforementioned galworm.

  Thus, in the insect-proof heat insulating material of the present invention, in order to continue to exhibit an excellent insect-control effect over a long period against pests often found in barns such as mussel worms, Optimally, 0.1 to 3% by weight of permethrin, 0.3 to 15% by weight of piperonyl butoxide as a synergist and 0.1 to 3% by weight of dibutyl succinate as a repellent are optimal.

  Furthermore, in the insect-proof heat insulating material of the present invention, in addition to the above-mentioned permethrin, synergist and repellent agent in the synthetic resin foam, pyrethrin, allethrin, phthalthrin, resmethrin, framethrin, phenothrin, empentrin, praretrin. Further, pyrethroid insecticides such as imiprothrin, transfluthrin, cyfluthrin, profluthrin, metfurthrin, and silafluophene may be contained.

In the present invention, the above-mentioned drugs (that is, permethrin, synergists, repellents, etc.) may be contained after dissolving in a solvent such as kerosene.
By using such a solvent, the drug can be easily dispersed in the polyurethane raw material liquid. Further, the amount of the solvent used is preferably within a range that does not cause foam cell roughness.

  The insect-proof heat insulating material of the present invention is manufactured as a board-shaped molded plate as described later. There is no restriction | limiting in particular about the thickness of an insect-proof heat insulating material, What is necessary is just to be the thickness of the heat insulating material which consists of synthetic resin foams for general livestock bar use, for example, about 5-75 mm.

For example, when the synthetic resin foam is a rigid polyurethane foam, the insect-proof heat insulating material as described above can be manufactured by the following procedure;
(1) A polyol component, an isocyanate component, a foaming agent (hereinafter, these two main components and a foaming agent are also collectively referred to as “polyurethane raw material”), a predetermined amount of permethrin, a synergist, a repellent, etc. In addition, these drugs are also referred to as “drug components”) at room temperature (room temperature), or the drug components are added after heating and melting to a temperature equal to or higher than the melting point, or the drug components are added as described above. Add pre-dissolved solvent and stir and mix.
At this time, in order to uniformly disperse the drug component in the insect-proof heat insulating material, it is necessary to add and mix into the polyurethane raw material liquid before the urethane reaction occurs, so it is added in advance to either the polyol component or the isocyanate component. It is preferable to mix them. In general, since the isocyanate component is highly reactive, it is more preferable to add and mix the polyol component continuously at one time or with stirring. The foaming agent may be added to the polyol component in advance and mixed with additives such as a flame retardant and a catalyst described later, or may be added and mixed when mixing the polyol component and the isocyanate component. May be.

  (2) Next, as shown in FIG. 1, a polyurethane raw material 1 containing a drug component is quantitatively supplied from the nozzle 4 to the face material 2 and is conveyed between the two face materials 2 and 2 'conveyed by the double conveyor. By reacting and foaming the polyol component and the isocyanate component (that is, causing a urethane reaction), a rigid polyurethane foam can be obtained in a state of being tightly integrated between the two face materials 2 and 2 '. In addition, the supply part 40,41 of an isocyanate component and a polyol component is each connected to the nozzle 4, In FIG. 1, the aspect which adds a chemical | medical agent component, a foaming agent, etc. to a polyol component previously, and mixes it. Show.

  As the face material, a known face material used as a face material of a heat insulating material such as paper such as kraft paper, synthetic resin plate, synthetic resin film, metal plate, metal foil, gypsum board can be used. In order to obtain the effect of preventing damage and injury from livestock, aluminum foil liner paper with polyester film, liner paper with polyethylene film, and the like are suitable.

The polyol in the polyol component is not particularly limited as long as it is a polyol having one or more hydroxyl groups in the molecule, such as polyester polyols, polyether polyols, polymer polyols, etc., which are used for producing ordinary polyurethane foams. Among them, polyester polyol and polyether polyol are mixed relatively well with the drug component, and the reaction with the isocyanate component (that is, urethane reaction) proceeds smoothly to obtain a polyurethane foam having the desired performance. This is preferable from the viewpoints of availability, availability, and cost.
These polyols can be used either alone or in admixture of two or more by an appropriate combination.

  As the isocyanate in the isocyanate component, tolylene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), crude MDI, hexamethylene diisocyanate (HMDI), xylylene diisocyanate (XDI), hydrogenated TDI, hydrogenated MDI, metaxylylene diisocyanate Etc., and those used for the production of ordinary polyurethane foams are used. Among them, the MDI smoothly advances the reaction with the polyol component containing the drug component (that is, the urethane reaction), and the expected performance is achieved. It is preferable in terms of the ability to obtain a polyurethane foam having it, the performance of the product foam, the availability, and the cost.

  In addition, these polyol component and isocyanate component are flame retardant, foam stabilizer, catalyst, colorant, plasticizer, filler, cross-linking agent, antifungal agent, thickener, thinning agent, dispersion as required. Various additives such as an agent and a surfactant can be appropriately blended and adjusted.

  As the above foaming agent, commonly used foaming agents such as hydrocarbon gas such as propane, butane, pentane, etc. can be used in addition to chlorofluorocarbon, carbon dioxide gas, and water. It is particularly preferable to use hydrocarbon gas or water in consideration of environmental problems and the like as well as being not hindered.

  Thus, when the synthetic resin foam is a rigid polyurethane foam, the blending ratio of the above polyurethane raw materials (polyol component, isocyanate component, foaming agent) may be the same as that in a general polyurethane foam heat insulating material. Is suitable in a weight ratio of 50: 100: 1 to 150: 100: 30, preferably 70: 100: 2 to 90: 100: 15.

  In the insect-proof heat insulating material of the present invention, the synthetic resin foam may be composed of a plurality of layers, and the permethrin concentration in each layer may be different. The number of layers is not particularly limited. For example, when there are three layers, the two layers may have the same concentration and may differ by the concentration of the remaining one layer. Specifically, for example, in the case of two layers, pests are exposed to the surface of the heat insulating material by reducing the concentration of the inner layer of the barn where there is a high possibility of contact with livestock, and increasing the concentration on the outer side of the barn. Even if it tries to intrude, the nesting inside the heat insulating material can be surely prevented. Or, when it is made of three layers, such as thicker heat insulating materials, only the concentration of the middle layer of the heat insulating material may be increased, the concentration of both outer layers may be the same, and emphasis is placed on the sustained release of insect repellent over many years. When placing, the concentration may be increased from the inner layer of the barn toward the outer wall layer.

The method of making the synthetic resin foam into a plurality of layers and different permethrin content concentrations in each layer is not particularly limited, for example,
A) Synthetic resin foam layers having different concentrations of permethrin are produced and bonded together with an adhesive or the like to integrate the layers, and then a face material is attached.
B) After producing a synthetic resin foam and impregnating the foam with a permethrin solution or spraying the foam with a permethrin solution under a constant pressure to provide a concentration gradient in one foam, Affix.
C) As shown in FIG. 2, a plurality of nozzles 5 and 6 are provided, and polyurethane raw materials 11 and 21 having different permethrin concentrations are supplied to the face materials 22 and 22 'from each nozzle. In addition, in FIG. 2, the example which manufactures the insect-proof heat insulating material which consists of a two-layer synthetic resin foam is shown by installing two nozzles.
When the synthetic resin foam is a polystyrene foam, the above method B) can be suitably used, and when it is a rigid polyurethane foam, the bonding step with the face material can be omitted (ie, Since the urethane reaction, foaming, and adhesion to the face material are simultaneously performed), the above method C) can be suitably used.

The insect-insulating heat insulating material of the present invention can reliably prevent long-term food damage caused by pests often seen in barns, and can eliminate the trouble of small surface treatment during construction on site.
For this reason, the insect-proof heat insulating material of this invention can be used conveniently for the inner wall surface, ceiling, etc. of a livestock barn.

Examples 1-3, Comparative Examples 1-6
A polyol and other additives were mixed at the ratio shown below to prepare a polyol component (hereinafter also referred to as “premix resin”).

(Premix resin raw material)
-4 types of polyol (* 1) 111.5 parts by weight-Foam stabilizer (* 2) 1.5 parts by weight-3 types of catalyst (* 3) 1.26 parts by weight-Water 2 parts by weight

* 1: (1) Polyol A; 80% polyether polyol and 20% polyester polyol (hydroxyl value 780) manufactured by Asahi Glass Urethane Co., Ltd.
(2) Polyol B: Asahi Glass Urethane Co., Ltd. 78% polyether polyol, 20% polyester polyol and 2% polymer polyol (hydroxyl value 470),
(3) Polyol C; a saturated polyester resin (hydroxyl value 845) manufactured by Dainippon Ink & Chemicals,
(4) Polyol D: polyether polyol (hydroxyl value 460) manufactured by Sumika Bayer Urethane Co., Ltd.
* 2: Silicone foam stabilizer (trade name “L5420” manufactured by Nihon Unicar)
* 3: (1) Catalyst A; pentamethylenediethylenetriamine (trade name “Kau Riser No. 3” manufactured by Kao Corporation),
(2) Catalyst B; Tris (dimethylaminopropyl) hexahydro-S-triazine (trade name “Polycat 41” manufactured by Air Products),
(3) Catalyst C: Lead octylate (trade name “Pb-Oc” manufactured by Dainippon Ink and Chemicals, Inc.)
Use the same amount

After adding 63.9 parts by weight of the premixed resin to the drug components shown in Tables 1 and 2 at the ratios (parts by weight) shown in Tables 1 and 2 at room temperature, and stirring well so as to disperse uniformly. 12.6 parts by weight of a foaming agent (cyclopentane (manufactured by Nippon Zeon Co., Ltd.)) was added and stirred until well-fitted.
Subsequently, 100 parts by weight of isocyanate (MDI: diphenylmethane diisocyanate (manufactured by Sumika Bayer Urethane Co., Ltd.)) was added, mixed and stirred, and immediately put into a foaming container to obtain a block-like foam (synthetic resin foam). .
In each table, the calculated permethrin concentration (% by weight) contained in each synthetic resin foam is also shown.

* 1 → ETB emulsion (trade name “Animal Goldbird ETB Emulsion” manufactured by Dainippon Seikoku Co., Ltd.): Permethrin 4% by weight, piperonyl butoxide, dibutyl succinate kerosene solution * 2 → Danside E-50 (Suika Enviroscience) Manufactured by): glycol ether-based solution of 50% by weight of permethrin

* 1 → ETB emulsion (trade name “Animal Goldbird ETB Emulsion” manufactured by Dainippon Seikoku Co., Ltd.): Permethrin 4% by weight, piperonyl butoxide, dibutyl succinate kerosene solution * 2 → Danside E-50 (Suika Enviroscience) Manufactured): Permethrin 50% by weight glycol ether solution * 3 → Piperonyl butoxide: Drug substance

(Insect repellent test)
From the obtained synthetic resin foams of Examples 1 to 3 and Comparative Examples 1 to 6, a sample was cut into a size of 25 mm thickness × 30 mm × 40 mm, and this was used as a sample for an insecticidal test. The insect repellent test was conducted by the following method.

As shown in FIG. 3, the insect test sample 31 (25 mm thick × 25 mm thick) is provided on the bottom surface of a plastic cup 30 having a diameter of about 100 mm and a volume of 236 cc. (30 mm × 40 mm) was fixed with double-sided adhesive tape, and a bait 32 of a full medicine was placed near the opposite side wall. In this cup 30, 10 adult larvae and 10 final larvae were placed, and this was used as one specimen and placed in a breeding box set at 30 ± 2 ° C.
Then, after 7 days, the state of the sample 31 for insect repellent test after 14 days was observed, and the number of galling marks and the number of perforations were measured. The results are also shown in Tables 1 and 2.

In addition, the standard of “scratch marks” and “insect repellent comprehensive evaluation” in each table is as follows:
<Scratch marks>
○: Less than 5 galling marks ×: 5 or more galling marks <Comprehensive evaluation of insect repellent properties>
○: Excellent insect repellent effect △: Insect repellent effect is observed ×: No insect repellent effect

In Examples 1 and 2, since the number of galling marks was less than 5 and the number of perforations was 0, it can be determined that the insect-proof effect is excellent. In Example 3, although the number of perforations was 3, the number of galling marks was less than 5 and it can be determined that an insecticidal effect was observed.
In addition, as for the synthetic resin foam of Examples 1-3, the foam which can ensure sufficient heat insulation was not formed in any foam roughening or shrinkage | contraction.

  In Comparative Examples 1 to 6, most adults and final larvae perforated the sample and entered it, and only a few of them could be recognized.

(Residual effect test-effect persistence test-)
The above-mentioned synthetic resin foams of Examples 1 and 2 were exposed to a room temperature environment of about 30 to 40 ° C. for about 5 months in summer from May to September. An insect repellent test was conducted. The results are shown in Table 3.

  From the results in Table 3, it was found that the synthetic resin foams of Examples 1 and 2 were excellent in residual effect.

The insect-proof heat insulating material of the present invention can reliably prevent long-term damage caused by pests often seen in barns, and eliminates the trouble of small surface treatment during construction on site.
The insect-proof heat insulating material according to the present invention having such excellent characteristics is suitable as a heat insulating material for buildings, particularly livestock barns, and can be suitably used for walls, ceilings and the like.

It is the figure which illustrated one embodiment which manufactures the insect-proof heat insulating material of this invention. It is the figure which illustrated other embodiments which manufacture the insect-proof heat insulating material of this invention. It is explanatory drawing which showed the method of the insect-proof test.

Explanation of symbols

1,11,21 Synthetic resin foam raw material 2,2 ', 22,22' Face material 30 Plastic cup 31 Sample 32 Bait 4,5,6 Nozzle 40,50,60 Isocyanate component supply unit 41,51,61 Polyol Component supply section

Claims (3)

Insect-proof heat insulating material made of synthetic resin foam,
An insect-insulating heat insulating material comprising permethrin, a synergist and a repellent in the synthetic resin foam, wherein the concentration of permethrin contained in the synthetic resin foam is 0.1 to 3% by weight. .   The insect-insulating material according to claim 1, wherein the synthetic resin foam is a rigid polyurethane foam.   The insect-proof heat insulating material according to claim 1 or 2, wherein the synthetic resin foam comprises a plurality of layers, and each layer has a different permethrin content concentration.