JPH06294165A - Insectproof heat insulating material - Google Patents

Abstract

PURPOSE:To prevent the corrosion of a heat insulating material of polyurethane foam from termites by mixing pyresteroid compound and toluene in the polyurethane foam. CONSTITUTION:For example, pyresteroid compound and toluene are mixed with system consisting of polyore component and isocyanate component in advance. If necessary, 3-iodo-2-propyl-butyl carbamide as an antiseptic/mildew proofing agent can be also added. At that time, as pyresteroid compound, permethrin or decamethrin, etc., are used. After that, such a mixture consisting of polyore component, etc., is foamed, and a heat insulating material of polyurethane foam is obtained. When the polyore component and isocyanate component are foamed, pyesteroid compound, etc., can be mixed with them. Accordingly, termites are exterminated by pyresteroid compound, and rate of insecticide can be promoted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insect-proof heat insulating material, and more particularly to a heat insulating material having an excellent insect-proofing function, which is used for outside heat insulation, middle heat insulation, inner heat insulation of a house.

[0002]

2. Description of the Related Art Polyurethane foam is suitable for use as a heat insulating material for houses and the like because of its excellent heat insulating properties, self-adhesiveness, and ease of manufacturing. However, on the other hand, polyurethane has a problem that it is easily eaten by termites, and it has been proposed to control termites by using organochlorine insecticides, organophosphorus insecticides, boron compounds, and organotin compounds. .

[0003]

However, it has been difficult so far to sufficiently control the feeding damage of the polyurethane foam caused by termites, and the development of a new termite control method has been desired.

[0004]

Means for Solving the Problems The inventors of the present invention have repeatedly studied a method for protecting a heat insulating material such as a house made of polyurethane foam from feeding damage by termites. As a result, the pyrethroid compound and toluene are mixed in the foam. It was found that by doing so, the feeding damage by termites can be controlled very well. In addition, the present inventors have added to the pyrethroid compound and toluene, and further to the antiseptic / antifungal agent 3-iodo-2-propynyl butyl carbamate (hereinafter, referred to as IP
It is referred to as BC. The present invention has been found that not only the addition of antiseptic and antifungal functions, but also the ant-preventing effect can be further improved by adding the above).

Examples of the pyrethroid compound used in the present invention include permethrin [3-phenoxybenzyl 3- (2,2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate] and decamesulin [(S) -α- Cyano-3-phenoxybenzyl
(1R) -cis-3- (2,2-dibromovinyl)-
2,2-dimethylcyclopropanecarboxylate] and the like, and the amount of the pyrethroid compound mixed in the polyurethane foam varies depending on various conditions such as the type of the pyrethroid compound and the application site of the heat insulating material, but is generally 0.
It is about 05 to 10.0% by weight.

In the present invention, toluene is used to increase the termite-preventing effect of the pyrethroid compound, but it can be used by also having the function of the pyrethroid compound and also as the solvent of IPBC. 0.05-5.0% by weight to polyurethane foam
It is a degree. When IPBC is added, the amount used is generally 0.1 to 1 with respect to polyurethane foam.
It is about 0.0% by weight.

[0007] As shown in the examples described below, the insect-insulating heat insulating material of the present invention is foamed by previously mixing a pyrethroid compound, toluene and, if necessary, IPBC etc. into a system consisting of a polyol component and an isocyanate component. It is manufactured by Further, when the polyol component and the isocyanate component are mixed and foamed, a pyrethroid compound, toluene and the like may be injected.

[0008]

EXAMPLES Next, the present invention will be described in more detail based on examples. Example 1 Toluene containing a polyol (Edihome AR manufactured by Kao Corporation), an isocyanate (Edihome B manufactured by Kao Corporation), and toluene containing 0.25% by weight of permethrin (a ratio based on the total amount of polyol and isocyanate) was mixed at room temperature. , Foam. In addition, the amount of permethrin was changed to 0.5% by weight and 2.0% by weight, and further IPB
Similarly, a mixture containing C1.0% by weight (ratio to the total amount of polyol and isocyanate) is mixed,
Foam. Further, for comparison, a polyurethane foam foamed using permethrin containing no toluene, chlorpyrifos (a known anticide), and propetanephos (a known anticide) was prepared, and the following anticidal efficacy test was conducted. It was Cut each foamed polyurethane foam into a cube of 2 cm square and use it for quartz sand and termites (15 ants +
Put it in the test tube tank containing 150 worker ants), 3 days, 7
The weight loss rate of the polyurethane was measured after day 14, 14 and 21 days. The mortality rate was also measured. The results are shown in Table 1.

[0009]

[Table 1] As shown in the table above, the polyurethane foam mixed with the toluene-containing permethrin of the present invention not only shows a higher anticidal effect as compared with chlorpyrifos and propetanfos, but also has an excellent effect on the weight loss rate corresponding to feeding damage. Was recognized. It also showed a higher anticidal effect than permethrin, which does not contain toluene. Furthermore, the one with added IPBC showed a higher anticidal effect than the one without added IPBC.

Example 2 In Example 1, decamethrin was used in place of permethrin, polyurethane foam was foamed into a plate, and the same test as above was conducted. The results are shown in Table 2.

[Table 2]

[0011]

EFFECTS OF THE INVENTION According to the present invention, it is possible to very effectively control termite damage caused by termites on a heat insulating material such as a house made of polyurethane foam.

Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location A01N 53/00 C 9159-4H E04B 1/80 C 8809-2E // (A01N 53/00 27:00) ( A01N 53/00 47:12 27:00) (72) Inventor Kiyoyuki Fushiki Address: 341, Karasumaru Nishiiri, Kagaya-cho, Shimogyo-ku, Kyoto-shi, Kyoto Prefecture (72) Inventor Yoshinaga Katsuzawa 2-229, Suzuki-cho, Kodaira-shi, Tokyo (72) Inventor Hayato Teshima 4-2-1 Takashi, Takarazuka-shi, Hyogo Sumitomo Kagaku Kogyo Co., Ltd.

Claims (3)

[Claims] 1. A heat insulating material comprising a polyurethane foam, wherein a pyrethroid compound and toluene are mixed in the foam. 2. A heat insulating material comprising a polyurethane foam, wherein the pyrethroid compound, 3-iodo-2-propynyl butylcarbamate and toluene are mixed in the foam. 3. The insect repellent insulation material according to claim 1, wherein the pyrethroid compound is permethrin or decamesulin.