JP2001123003A - Molded article made of foamed resin impregnated with impregnation additive and method for impregnation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molded article made of a foamed resin impregnated with an impregnation additive which can furnish a desired property such as a moth-proofing property, an anti-termite property, heat resistance, flame retardance, coloring or the like, economically and easily and without using dedicated facilities, and which can hold such a property for a long time, and to provide a method for the impregnation. SOLUTION: An additive 1 comprising an impregnation additive, a surfactant and a solvent is contacted with a molded article 2 made of a foamed resin to impregnate and disperse the additive into the article. An organic solvent type dispersing agent may be used instead of the surfactant. Furthermore, it may be used instead of the surfactant and the solvent. An example of the impregnation additive is a moth-proofing and anti-termite agent comprising boric acid, a salt thereof or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foamed resin molded article impregnated with an impregnating additive for imparting properties such as insect and insect repellency, heat resistance, flame retardancy, coloring and the like, and more particularly to a heat insulating material for buildings. The present invention relates to a method for imparting insect and termite resistance to a foamed resin molded article used as a heat insulating material or the like.

[0002]

2. Description of the Related Art Conventionally, in order to impart properties such as insect repellency, termite control, heat resistance, flame retardancy, and coloring to a foamed resin molded article, an additive capable of exhibiting these properties has been attached to the foamed resin molded article. Has been done. For example, JP-A-10-36549
And Japanese Patent Application Laid-Open No. 3-202528 discloses a technique for applying a termiticide to a foamed resin molded article. As a method for imparting such desired properties to the foamed resin molded article, an impregnating additive imparting a desired effect is used.
Adding at the time of polymerization, adding at the time of foam molding,
A method of directly adding to a foamed resin molded article and the like are generally known.

[0003] As a method, Japanese Patent Laid-Open No. 10-3654 is disclosed.
A method of spraying a termiticide and an adhesive onto foamed resin particles as in No. 9, a method of foaming by mixing foamable resin particles before terminating with an antitermite as in JP-A-3-202528, etc. It has been known. The method described in JP-A-3-2025
As described in No. 28, a method of dipping a foamed resin molded article in a termite-controlling agent treatment solution, a method of applying a termiticide to the surface of the foamed resin molded article, and the like are known.

[0004]

However, the above-mentioned method of adding at the time of polymerization requires enormous dedicated equipment, so that the production cost becomes large and it is not economical. In addition, in this method, a large amount of impregnation additive must be added in order to exhibit good properties, and therefore, there is a problem that the mechanical strength of the obtained foamed resin molded article is significantly reduced. In particular, in order to impart insect repellent and termite resistance to the foamed resin molded article, it is necessary to increase the mixing ratio of the insect repellent and termiticide as an additive, and therefore, the mechanical strength of the obtained foamed resin molded article is reduced. There is a problem of remarkable reduction.

[0005] In addition, in the method of adding at the time of foam molding,
Since special foam molding equipment is required, the production cost becomes large and it is not economical. Further, the additive acts as an inhibitor of thermal fusion of the foamed resin molded article during molding. Therefore, there is a problem that the mechanical strength of the obtained foamed resin molded article is significantly reduced.

On the other hand, in the method of directly adding to the foamed resin molded article, these methods are more economical than the above method because no special equipment is required. However, the additive only adheres to the surface of the foamed resin molded article, and does not sufficiently impregnate and disperse into the gap between the foamed particles inside. Also, its adhesive strength is weak. As a result, the additive is easily released from the surface,
There is a problem that the property cannot be maintained for a long time.

In view of the conventional problems, the present invention makes it possible to easily and economically impart desired properties such as insect and termite resistance, heat resistance, flame retardancy, coloring and the like to a foamed resin molded article without using dedicated equipment. Another object of the present invention is to provide a foamed resin molded article impregnated with an impregnating additive and an impregnation method capable of maintaining its properties for a long time.

The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, have found a method of directly adding an impregnating additive capable of imparting desired properties to a foamed resin molded article to the foamed resin molded article. The present invention was completed by noting that the additive adheres not only to the surface but also to the inside of the foamed resin molded article.

[0009]

According to the first aspect of the present invention, an additive comprising an impregnating additive, a surfactant and a solvent is brought into contact with a foamed resin molded article, and the impregnated additive is impregnated and dispersed in the foamed resin molded article. This is a method for impregnating a foamed resin molded article with an impregnation additive.

In the impregnation method, an impregnating additive capable of imparting desired properties to the foamed resin molded article is brought into contact with the foamed resin molded article together with a surfactant and a solvent. The solvent turns the impregnating additive into a solution to improve penetration into the interior of the foamed resin molded article. Further, the surfactant enhances the affinity between the impregnating additive and the foamed resin molded article, and enhances the permeability of the impregnating additive. For this reason, the impregnating additive permeates not only on the surface of the foamed resin molded article but also along the gap and into the internal gap. Therefore, the impregnating additive adheres not only to the surface but also to the inside of the foamed resin molded article, and can exhibit its properties for a long time.

In the impregnation method, the impregnated additive is impregnated into the foamed resin molded article by a simple method of bringing the foamed resin molded article into contact with an additive comprising an impregnating additive, a surfactant and a solvent. ing. Therefore, the properties of the impregnation additive can be easily imparted to the foamed resin molded article. In addition, since the impregnating additive is impregnated into the foamed resin molded article, it does not hinder foaming and molding of the foamed resin molded article, and can maintain the strength of the foamed resin molded article. .

Next, as the foamed resin molded article, a foamed resin molded article made of closed-cell foamed resin particles and a foamed resin molded article having open cells can be used. When the foamed resin molded article is composed of closed-cell foamed resin particles,
According to the impregnation method of the present invention, the impregnating additive is sufficiently impregnated and dispersed in the fine gaps between the foamed resin particles formed between the particles formed by the foamed resin particles. Alternatively, in the case of a foamed resin molded article having open cells, the impregnating additive is sufficiently impregnated and dispersed in continuous fine voids by the impregnation method of the present invention.

The foamed resin used for the foamed resin molded article includes polystyrene foamed resin, polyethylene foamed resin, polypropylene foamed resin, polymethyl methacrylate foamed resin, urethane foamed resin, isocyanurate foamed resin, and melamine. A foamed resin, a phenolic foamed resin, a copolymer foamed resin thereof, and the like can be used. Among these, a polystyrene foamed resin molded article is particularly preferable. When a foamed resin molded article is used as a building material, it is preferable to use one having high mechanical strength and heat insulation properties, for example, a polystyrene foamed resin molded article.

According to a fifth aspect of the present invention, the foamed resin composition
The water absorption indicating the water absorption performance of the form is 0.03 g / 100
cm²It is preferable that it is above. 0.03g / 100
cm ²If the value is less than, the impregnating additive
Hardly adheres to the inside and is applied to the foamed resin molding
There is a possibility that the desired properties may not be sufficiently exhibited. What
Note that the water absorption is measured by the measurement method of JIS A9511.
It is. In addition, the above-mentioned water absorption of the foamed resin molded article depends on the water absorption.
The upper limit is 3.0 g to prevent the heat insulation performance from being lowered.
/ Cm²The following is preferred.

The expansion ratio of the foamed resin molded article may be any magnification. Even when the foamed resin molded article is a styrene-based foamed resin molded article, the expansion ratio may be any number, and is preferably 5 to 120 times.

Next, the impregnating additive is an additive for impregnating the foamed resin molded article and imparting desired properties such as insect repellent / termite protection, heat resistance, flame retardancy, coloring, etc. to the foamed resin molded article. Say.
Any impregnating additive can be used as long as it imparts desired properties to the foamed resin molded article.

Preferably, the impregnating additive is an insect repellent and termite repellent. As insect repellents and termites, pyrethroids such as permethrin, bifenthrin, and tralomethrin,
Organophosphorus drugs such as chlorpyrifos, phoxime, pyridafenthion, tetrachlorvinphos, fenitrothion, propetanphos; carbamate drugs such as fenobcarb and carbamate; drugs having a chloropyridylmethyl group such as fipronil, acetamiprid and imidacloprid; chromium / copper・ Arsenic compounds, chlornaphthalene drugs, arsenic compounds such as sodium arsenate, lead arsenate, barium acid arsenate, fluoride compounds such as lead fluoride, barium fluoride, sodium silicofluoride, copper compounds, dinitroortho Boron compounds such as cresol, tributyltin oxide, borate, etc., titanium compounds such as titanium oxide, hinokitiol, creosote oil, triazine drugs, metal naphthenates such as copper naphthenate, organic tin compounds, phenol Inorganic fluorides, a mixture of P-chlorometaxylenol and 3,6-dichloropyridazine, etc. may be used, and any action such as contact poison, poison, respiratory poison, repellent termite, etc. may be used. .

In addition, not only one kind of insect repellent and termiticide but also two or more kinds can be used. When the foamed resin molded article is used as a heat insulating material or a heat insulating material for a building, it is preferable to use a borate, a pyrethroid-based drug, imidacloprid, or the like, which is particularly low in toxicity, as an insect repellent or termite control agent.

Preferably, the impregnating additive is boric acid or a salt thereof. As a result, insect repellent and termite-controlling effects can be effectively exhibited. Boric acid or a salt thereof is hydrophilic and originally has a low affinity for a relatively hydrophobic foamed resin molded product. However, by contacting the foamed resin molded product with a surfactant and a solvent, the foamed resin molded product can be formed. Penetrates smoothly into the inside of the body and adheres not only to the surface of the foamed resin molded body but also to the inside. The impregnation amount of the impregnating additive into the foamed resin molded product is generally 0.0
It is preferably in the range of 01 to 3.0% by weight. Considering the effect, safety and economics of the impregnation, 0.01 to 2.0% by weight is desirable. In addition, when the effect of impregnation is weak, such as a boron compound such as borate and a titanium compound such as titanium oxide, 0.01 to
30% by weight is preferred. In consideration of safety and economy, 0.1 to 20% by weight is desirable.

The amount of the impregnating additive impregnated into the foamed resin molded article varies depending on the degree of properties such as insecticidal and termiticidal abilities of the insect repellent and termiticide. When the impregnating additive is a pyrethroid drug having a high insecticidal / anticidal ability, imidacloprid, or the like, 0.
0.1 to 1.0% by weight is preferred, and in the case of boric acid or a salt thereof having relatively low insecticidal / anticidal efficacy, 0.1 to 2.
0% by weight is preferred. In addition, 0.1 to 20 if necessary
% By weight can also be used.

The concentration of insect repellent and termite in the additive is preferably in the range of 0.1 to 80% by weight.
Considering economy and safety, 1.0 to 50% by weight is desirable. Those with very strong insecticidal and ant killing abilities
The content is preferably 0.01 to 80% by weight, more preferably 0.1 to 80% by weight.
05 to 50% by weight. As the insect repellent / termite control agent, the active substance itself, emulsion type, microcapsule, etc. can be used.

Next, most surfactants such as anionic surfactants, cationic surfactants, amphoteric surfactants, and nonionic surfactants can be used as the above-mentioned surfactants, and particularly preferably, they are widely used. It is a commonly used anionic surfactant with low toxicity. Not only one surfactant but two or more surfactants can be used.

The surfactant is preferably a cationic surfactant having an antibacterial action. This makes it possible to obtain a foamed resin molded article that can effectively exhibit insect- and termite-controlling effects. As such a cationic surfactant having an antibacterial action, quaternary ammonium salt, alkyltrimethylammonium bromide, which has a particularly strong bactericidal property, can be used.

The concentration of the surfactant in the additive is from 0.01 to
It is preferably 5.0% by weight. When the content is less than 0.01% by weight, the impregnating additive hardly adheres to the inside of the foamed resin molded article, and the performance may be reduced. If the content exceeds 5.0% by weight, the heat insulation performance of the foamed resin molded article due to water absorption may be reduced. Considering the properties to be imparted and the economics thereof, the surfactant concentration in the additive is desirably 0.05 to 1.0% by weight.

The above-mentioned solvent makes the impregnating additive a solution. As such a solvent, a solvent in which the impregnation additive is dissolved can be used among solvents such as water and an organic solvent. In particular, when the foamed resin molded article is a polystyrene-based foamed resin, water, a low-soluble organic solvent, alcohol, polyethylene glycol, or the like which does not attack the resin is preferable. One or more solvents can be used. The concentration of the solvent in the additive is preferably from 15.0 to 99.9% by weight.
It is desirably 9.0 to 99.7% by weight.

It is preferable that an adhesive is further added to the additive. Thereby, the impregnation additive can be more firmly adhered to the surface and the inside of the foamed resin molded article.

As the adhesive, a solvent type adhesive such as a thermoplastic resin adhesive, a thermoplastic acrylic resin, a thermoplastic polyester resin, a urethane resin, a urethane modified acrylic resin, an acrylic modified silicone resin, an acrylic emulsion, an acrylic Use emulsion resins such as styrene copolymer emulsion, acrylic / vinyl acetate copolymer emulsion, ethylene / vinyl acetate copolymer emulsion, epoxy emulsion, urethane emulsion, etc., and water-soluble adhesives such as polyester resin, polyamide resin and polyurethane resin. be able to. The concentration of the adhesive in the additive is preferably from 0.01 to 0.5% by weight.
3% by weight is desirable.

Next, as a method of bringing the additive into contact with the foamed resin molded article in the present invention, a method of applying to the surface of the foamed resin molded article with a brush or the like, a method of applying using a spraying device or the like, a roll coater or the like. A method of applying, a method of dipping the foamed resin molded article in the additive, and a method of injecting the additive under pressure can be used. Of these methods, a method of applying a brush or the like to the surface of a foamed resin molded article is particularly simple and economical. In consideration of the processing capacity, the foamed resin molded article is immersed in the additive, and is subjected to 1000 to 20000P.
A method of increasing the pressure of a can also be adopted.

The foamed resin molded article may be a single piece.
More than one molded body may be laminated, and in consideration of economy and processing capacity, it is preferable to immerse the foamed resin molded body in an additive in a state where two or more molded bodies are laminated. The foamed resin molded article impregnated with the impregnation additive can be used for, for example, building materials, civil engineering materials, and the like.

Next, an invention according to claim 3 is to provide an additive comprising an impregnating additive, an organic solvent-based dispersant and a solvent, in contact with the foamed resin molded article, and to apply the impregnated additive to the foamed resin molded article. This is a method of impregnating a foamed resin molded article with an impregnating additive, wherein the impregnating additive is impregnated and dispersed.

The present impregnation method is characterized in that an organic solvent-based dispersant is used instead of the surfactant.
In this impregnation method, the organic solvent-based dispersant enhances the affinity between the impregnating additive and the foamed resin molded article, enhances the permeability of the impregnated additive, and disperses the impregnated additive inside the foamed resin molded article. Let it. For this reason, the impregnating additive permeates not only on the surface of the foamed resin molded article but also along the gap and into the internal gap. Further, the solvent makes the impregnating additive a solution to improve the penetration into the interior of the foamed resin molded article. Therefore, by bringing the impregnating additive capable of imparting desired properties to the foamed resin molded article together with the organic solvent-based dispersant and the solvent into contact with the foamed resin molded article, the impregnating additive is brought into contact with the surface of the foamed resin molded article. Not only that, it adheres securely to the inside and can exhibit its properties for a long time.

In the impregnation method, the impregnated additive is brought into contact with an additive comprising an impregnating additive, an organic solvent-based dispersant and a solvent by a simple method. Has been impregnated. Therefore, the properties of the impregnation additive can be easily imparted to the foamed resin molded article. In addition, since the impregnating additive is impregnated into the foamed resin molded article, it does not hinder foaming and molding of the foamed resin molded article, and can maintain the strength of the foamed resin molded article. .

The organic solvent-based dispersant enhances the affinity between the impregnation additive and the foamed resin molded article. As such a dispersant, most organic solvent systems can be used. When the foamed resin molded article is a polystyrene-based foamed resin, the dispersant is a low-soluble organic solvent that does not attack the foamed resin molded article, for example, low-soluble kerosene, paraffin oil,
Isoparaffin oil, alcohol, polyethylene glycol and the like are preferred. One or more dispersants can be used. The concentration of the dispersant in the additive is 0.
It is preferably from 1 to 99.9% by weight.

The above-mentioned solvent is used to make the impregnating additive into a solution. As such a solvent, among solvents such as water and an organic solvent, those which can dissolve the impregnation additive can be used. In particular, when the foamed resin molded article is a polystyrene-based foamed resin, water that does not attack the resin, an organic solvent having low solubility,
Alcohol, polyethylene glycol and the like are preferred. One or more solvents can be used.
The concentration of the solvent in the additive is preferably 15.0 to 99.9% by weight, and 49.0 in consideration of efficacy and economy.
It is desirably about 99.7% by weight. The other points are the same as the impregnation method of the impregnation additive using the surfactant.

Some organic solvent-based dispersants not only impregnate the impregnating additive into the interior of the foamed resin molded article, but also act as a solvent for turning the impregnating additive into a solution. In this case, an additive comprising an impregnating additive and an organic solvent-based dispersant may be brought into contact with the foamed resin molded article in the absence of a solvent.

That is, according to the invention of claim 4, an additive comprising an impregnating additive and an organic solvent-based dispersant is brought into contact with the foamed resin molded article, and the impregnated additive is impregnated and dispersed in the foamed resin molded article. This is a method for impregnating a foamed resin molded article with an impregnation additive.

The present impregnation method is characterized in that an organic solvent-based dispersant is used instead of the surfactant and the solvent. In this impregnation method, the organic solvent dispersant is
It not only impregnates the impregnating additive into the interior of the foamed resin molded article, but also functions as a solvent for turning the impregnating additive into a solution. For this reason, by contacting the additive comprising the impregnating additive and the organic solvent-based dispersant with the foamed resin molded article in the absence of a solvent, the impregnated additive is not only present on the surface of the foamed resin molded article but also in the gap. To penetrate to the inside and adhere to the internal gap. Therefore, the impregnating additive adheres reliably to the foamed resin molded article, and can exhibit its properties for a long time.

In this impregnation method, the foamed resin molded article is impregnated with the impregnated additive by a simple method of contacting the foamed resin molded article with an additive comprising an impregnating additive and an organic solvent-based dispersant. Let me. Therefore, the properties of the impregnation additive can be easily imparted to the foamed resin molded article. In addition, since the impregnating additive is impregnated into the foamed resin molded article, it does not hinder foaming and molding of the foamed resin molded article, and can maintain the strength of the foamed resin molded article. .

The organic solvent-based dispersant not only impregnates the impregnating additive into the interior of the foamed resin molded article, but also functions as a solvent for turning the impregnating additive into a solution. As such a dispersant, an organic solvent-based dispersant that can dissolve the impregnation additive can be used. When the foamed resin molded article is a polystyrene-based foamed resin, a low-solubility organic solvent that does not attack the resin, for example, low-solubility kerosene, paraffin oil, isoparaffin oil, alcohol, polyethylene glycol, or the like is preferable. One or more dispersants can be used. The concentration of the dispersant in the additive is between 20 and 9
Preferably it is 9.9% by weight. The other points are the same as the impregnation method of the impregnation additive using the surfactant.

Next, according to the invention of claim 6, an additive comprising an impregnating additive, a surfactant and a solvent is brought into contact with the foamed resin molded article, and the impregnated additive is brought into contact with the surface of the foamed resin molded article. A foamed resin molded article characterized by being impregnated and dispersed therein.

In the foamed resin molded article of the present invention, an impregnating additive capable of imparting desired properties to the foamed resin molded article is dispersed and impregnated not only on the surface of the foamed resin molded article but also on the internal gaps. Therefore, the adhesion of the impregnating additive is strong, and the property can be exhibited for a long time.

As in the invention of claim 7, it is preferable that an adhesive is further added to the additive. Thereby, the impregnating additive adheres more firmly to the foamed resin molded article, so that its properties can be maintained for a longer period of time.

As in the tenth aspect, the water absorption of the foamed resin molded product, which indicates the water absorption performance, is 0.03 g / 10
It is preferably 0 cm ² or more. 0.03g / 10
When it is less than 0 cm ² , the impregnating additive does not easily adhere to the inside of the foamed resin molded article, and the properties to be imparted to the foamed resin molded article may not be sufficiently exhibited. The upper limit of the above-mentioned water absorption of the foamed resin molded article is 3.0 g / cm ² in order to prevent a decrease in heat insulation performance due to water absorption.
The following is preferred.

As in the eleventh aspect of the present invention, the impregnating additive is preferably an insect repellent / ant repellent for the purpose of insect repellency. Further, as in the twelfth aspect of the present invention, the impregnating additive is preferably boric acid or a salt thereof. Further, as in the invention of the thirteenth aspect, the surfactant is preferably a cationic surfactant having an antibacterial action. In these cases, the foamed resin molded article can exhibit an excellent insect- and termite-controlling effect. Further, as in the invention of the fourteenth aspect, it is preferable that the foamed resin molded body is a single body or a laminated body obtained by laminating two or more molded bodies.

In place of the surfactant, an organic solvent-based dispersant can be used. That is, as in the invention of claim 8, an additive comprising an impregnating additive, an organic solvent-based dispersant and a solvent is brought into contact with the foamed resin molded article, and the impregnated additive is brought into contact with the surface of the foamed resin molded article. And a foamed resin molded article characterized by being impregnated and dispersed therein. This foamed resin molded article also has a strong adhesive force of the impregnating additive and can exhibit its properties for a long period of time, similarly to the foamed resin molded article using the surfactant.

Others are the same as the above-described impregnation method and the foamed resin molded article impregnated with the impregnation additive using a surfactant.

An organic solvent-based dispersant can be used instead of the surfactant and the solvent. That is, claim 9
As described in the invention, an additive comprising an impregnating additive and an organic solvent-based dispersant is brought into contact with the foamed resin molded article, and the impregnated additive is impregnated and dispersed on the surface and inside of the foamed resin molded article. There is a foamed resin molded article characterized in that: This foamed resin molded article also has a strong adhesive force of the impregnating additive and can exhibit its properties for a long period of time, similarly to the foamed resin molded article using the surfactant.

[0048]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described by comparing Examples 1 to 3 with Comparative Example 1. (Example 1) As a foamed resin molded article, a 50-fold foamed resin molded article of a polystyrene foamed resin (Styropor JF200 manufactured by Mitsubishi Chemical Foam Plastic Co., Ltd.) was prepared. The water absorption indicating the water absorption performance of this foamed resin molded article was measured by the method of measuring water absorption according to JIS A9511 and found to be 0.2 g / 100 cm ² . This foamed resin molded product was used as an untreated polystyrene foamed resin molded product.

Further, an additive comprising an impregnating additive, a surfactant and a solvent was prepared. That is, 5% by weight of disodium 8-borate tetrahydrate as an impregnating additive, 0.5% by weight of sodium dodecylbenzenesulfonate as a surfactant, and 94.4% by weight of water as a solvent were added to impregnate and disperse. 0.1% by weight of a red colorant was added to determine
The mixture was stirred for 0 minutes to obtain an additive for insect and termite control.

A sample having a size of 5 cm × 5 cm × 2.5 cm in thickness was cut out from the untreated polystyrene foamed resin molded article, and 1 g of the above-mentioned additive for insect and termite control was dropped on the surface thereof. After standing at room temperature for 30 minutes, the state of impregnation and dispersion of the additive was confirmed. As a result, FIG.
As shown in FIG. 1, the additive 1 dropped on the foamed resin molded article 2 as an untreated polystyrene foamed resin molded article is as shown in FIG.
As shown in (B), the particles penetrated through the gap 20 between the foamed particles 21 inside the foamed resin molded article 2 and adhered to the inside. Table 1 shows the results of the impregnation and dispersion.

Next, the above untreated polystyrene foamed resin molded article was 2.5 cm long × 2.0 cm wide × 10 cm long.
Was cut out, and its weight (A0) was measured with a weighing device. The untreated polystyrene foamed resin molded article was immersed in the above-mentioned additive for insect and termite control for 1 minute, taken out, dried at 50 ° C. for 1 day, and weighed (A1).
Was measured. Then, the impregnation amount (A2) of the additive was obtained from the weight difference (A2 = A1-A0) between the polystyrene foamed resin molded body before and after the additive immersion. Further, the polystyrene foamed resin molded product was cut in half in the horizontal direction with a cutter knife, and the impregnation and dispersion state was confirmed. The results are shown in Table 2.

Next, a sample having a size of 10 cm long × 10 cm wide × 10 cm long was cut out from the untreated polystyrene foamed resin molded article, and its weight was measured with a weighing device. Assuming that the weight is 100 parts by weight, 1 part by weight, 3 parts by weight, 5 parts by weight, and 10 parts by weight of the insect repellent
An additive for termite control was applied to the entire surface of the untreated polystyrene foamed resin molded product with a brush. From each of these samples, a sample for investigating an ant-control effect of 2 cm long × 1 cm wide × 1 cm thick was taken out.

The weight (B0) of this sample was measured with a weighing device. This sample was placed in a plastic container having a diameter of 8 cm and a height of 6 cm.
0 ants and 15 soldier ants were added, and saturated saline was added. This plastic container is 30 cm long x 22 cm wide x 10 height.
The container was placed in a container with a lid of cm and covered with a lid, and allowed to stand at 25 ° C. in the dark for 3 weeks. Sample weight after standing (B1)
Was measured with a weighing machine. The decrease amount (B2 = B0-B1)
And the reduction rate (100 × (B0−B1) / B0). In addition, the damage status was observed. The results are shown in Tables 3 and 4.

(Example 2) The untreated polystyrene foamed resin molded article of Example 1 was a 50-fold foamed untreated polystyrene foamed resin molded article having a water absorption of 1.0 g / 100 cm ² showing the water absorption performance. Except for the above, the impregnation additive was impregnated into the foamed resin molded body in the same manner as in Example 1. The same measurement as in Example 1 was performed, and the results are shown in Tables 1 to 4.

Comparative Example 1 The amount of the surfactant in the additive shown in Example 1 was set to 0% by weight, the amount of the impregnating additive was 5.1% by weight, and the amount of the solvent was 94.8% by weight. %, An untreated polystyrene foamed resin molded article was impregnated with the impregnating additive in the same manner as in Example 1. The same measurement as in Example 1 was performed, and the results are shown in Tables 1 to 4.

(Example 3) The untreated polystyrene foamed resin molded article of Example 1 had a water absorption of 0.03 g / 100.
except that the untreated polystyrene foam resin molded article 50 times foamed is cm ^2, the same procedure as in Example 1, was impregnated with the impregnation additive to the non-treated polystyrene foam resin molded article.
The same measurement as in Example 1 was performed, and the results are shown in Tables 1 to 4.

(Example 4) The untreated polystyrene foamed resin molded article shown in Example 1 was converted into a 50-fold untreated polystyrene foamed resin molded article having a water absorption of 0.04 g / 100 cm ² indicating the water absorption performance. The amount of the surfactant in the additive was 0.05% by weight, the amount of the impregnating additive was 5% by weight, and the amount of the solvent was 94.85% by weight. Then, the same impregnation dispersion test as in Example 1 was carried out. Further, as a sample for investigating the termite-controlling effect, the additive was added to 1,3,100 wt.
5, 10, 100, 300 parts by weight were added, and the same procedure as in Example 1 was carried out. The results are shown in Tables 1 to 4.

[0058]

[Table 1]

[0059]

[Table 2]

[0060]

[Table 3]

[0061]

[Table 4]

As can be seen from Tables 1 to 4, when the impregnating additive was impregnated into the foamed resin article together with the surfactant (Examples 1 to 4), the case where no surfactant was added (Comparative Example) Compared with Example 1), the amount of termites decreased at a low concentration was greater. Further, when the water absorption indicating the water absorption performance of the foamed resin molded article is 0.2 g / 100 cm ² or more (Examples 1 and 2), 0.03 g or 0.04 g / 100
In comparison with the case of cm ² (Examples 3 and 4), the internal permeability of the impregnating additive was larger, and the effect of controlling termites was greater.

[0063]

As described above, according to the present invention, the desired properties such as insect and termite resistance, heat resistance, flame retardancy, coloring and the like can be easily and economically imparted to the foamed resin molded article without using dedicated equipment. It is possible to provide a foamed resin molded article impregnated with an impregnation additive and a method of impregnation, which can maintain the properties for a long time.

[Brief description of the drawings]

FIGS. 1A and 1B are explanatory cross-sectional views of a foamed resin molded article for showing the state of impregnation of an additive in Embodiment 1;

[Explanation of symbols]

 1. . . Additives, 2. . . 20. foamed resin molded product, . . gap,

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Iwao Mizutani 653-2, Ryomi, Yokkaichi, Mie Prefecture Mitsubishi Chemical Foam Plastic Co., Ltd. F-term (reference) 2E001 DD01 DD05 DE01 DH13 DH14 HD01 HD02 HD03 HD04 HD08 HD09 4C058 AA23 BB07 JJ03 JJ21 4F074 AA32.

Claims (14)

[Claims] 1. A foamed resin characterized in that an additive comprising an impregnating additive, a surfactant and a solvent is brought into contact with a foamed resin molded article, and the impregnated additive is impregnated and dispersed in the foamed resin molded article. A method for impregnating a compact with an impregnation additive. 2. The method according to claim 1, wherein an adhesive is further added to the additive. 3. The foamed resin molded article is impregnated with an additive comprising an impregnating additive, an organic solvent-based dispersant, and a solvent, and brought into contact with the foamed resin molded article. For impregnating an impregnating additive into a molded foamed resin article. 4. A foaming method comprising bringing an additive comprising an impregnating additive and an organic solvent-based dispersant into contact with a foamed resin molded article, and impregnating and dispersing the impregnated additive in the foamed resin molded article. A method for impregnating a resin molding with an impregnation additive. 5. The method according to claim 1, wherein:
The amount of water absorption indicating the water absorption performance of the foamed resin molded article is 0.
A method for impregnating a foamed resin molded article with an impregnation additive, wherein the impregnation additive is at least 03 g / 100 cm ² . 6. An impregnated additive, a surfactant and a solvent are brought into contact with a foamed resin molded article, and the impregnated additive is impregnated and dispersed on the surface and inside of the foamed resin molded article. A foamed resin molded article characterized by the following. 7. The foamed resin molded article according to claim 6, wherein an adhesive is further added to the additive. 8. An additive comprising an impregnating additive, an organic solvent-based dispersant, and a solvent is brought into contact with the foamed resin molded article, and the impregnated additive is impregnated and dispersed on the surface and inside of the foamed resin molded article. A foamed resin molded article characterized by comprising: 9. An additive comprising an impregnating additive and an organic solvent-based dispersant is brought into contact with the foamed resin molded article, and the impregnated additive is impregnated and dispersed on the surface and inside of the foamed resin molded article. A foamed resin molded article, characterized in that: 10. The water absorption amount representing the water absorption performance of the foamed resin molded article according to any one of claims 6 to 9, wherein:
A foamed resin molded article having a mass of 0.03 g / 100 cm ² or more. 11. The insect repellent according to claim 6, wherein the impregnating additive is an insect repellent for controlling insects and termites.
A foamed resin molded product, which is a termiticide. 12. The foamed resin molded product according to claim 6, wherein the impregnating additive is boric acid or a salt thereof. 13. The foamed resin molded article according to claim 6, wherein the surfactant is a cationic surfactant having an antibacterial action. 14. The foamed resin molded article according to claim 6, wherein the foamed resin molded article is a single body or a laminate obtained by laminating two or more molded bodies.