JPH01265006A - Moth-proofing sheet - Google Patents

Abstract

PURPOSE:To obtain a safe moth-proofing sheet having low residual toxicity, by using obacunone, nomilin, limonin, deoxylimonin, deacetylnomilin or limonexylic acid of natural origin as an active component. CONSTITUTION:The objective moth-proofing sheet contains one or more kind of compounds selected from obacunone, nomilin, limonin, deoxylimonin, deacetylnomilin and limonexylic acid which are vermin-repellents originated from nature, having remarkable effect, extremely high safety and extremely low toxicity and extracted from the peel and/or pip of citrus fruit. The base material for the sheet is paper, cloth, nonwoven cloth, synthetic resin sheet (e.g. polyethylene sheet or nylon sheet) or their composite material. The moth- proofing sheet exhibits excellent repelling effect against a wide variety of vermin.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to obacunone, nomirin, and limonin.

The present invention relates to an insect repellent sheet containing one or more of deoxylimonin, deacetylomiline, and limonexiic acid as active ingredients.

[Conventional technology]

In recent years, with advances in housing structures, such as the spread of heating, improvements in the airtightness of houses, and changes in the living environment, houses, buildings, warehouses,
Damage caused by sanitary pests, nuisance pests, wood pests, grain storage pests, etc. in factories is also diversifying. In order to control these pests, there is an increasing demand for insect repellent sheets containing insect repellent substances. However, the insect repellent substances commonly used in insect repellent sheets today include synthetic agents such as pyrethroids and organic phosphorus agents.

[Problem that the invention seeks to solve]

Insect-proof sheets are often used in houses, buildings, warehouses, factories, etc., and there is a high possibility that people will come into contact with the insect-proof sheets.

However, most of the insect repellent materials currently available for use in insect repellent sheets are chemically synthesized products, and their safety and residual toxicity are problematic. Therefore, there is a strong desire for insect repellent sheets that use insect repellent substances that are highly safe and have less residual toxicity.

[Failure to solve the problem]

The present inventors first discovered that the highly effective natural-derived, not synthetic,
and extremely safe and extremely low toxicity pest control agents, namely obakunon, norimin, and limonin extracted from citrus peels and/or seeds.

A patent was filed (Japanese Patent Application No. 242356, 1982) for a pest control agent containing one or more of deoxylimonin, deacetylnomilyn, and limonexiic acid. Furthermore, as a result of extensive research, the present inventors have discovered that an insect repellent sheet that is not a synthetic product but contains naturally derived, highly safe, and extremely low toxicity substances exhibits an excellent insect repellent effect, and has completed the present invention. reached.

That is, the present invention provides a highly safe insect repellent sheet characterized by containing one and/or two or more of obacunone, norimin, limonin, deoxylimonin, deacetyl norimin, and limonexiic acid as active ingredients. be.

Obakunone, norimin, limonin, deoxylimonin, deacetyl norimin, and limonexiic acid used in the present invention are:
It is obtained by extraction and purification from the peel and/or seeds of citrus fruits, and has extremely low toxicity to humans, livestock, and fish, and is extremely safe.

Citrus fruits include orchid mandarin oranges or oranges, nut mandarin oranges, sweet mandarin oranges, and honeysuckle mandarin oranges.

These include Iyokan, Ponkan, Tankan, Daidai, Yuzu, Grapefruit, and Lemon.

Specifically, the insect pests targeted by the insect-proof sheet of the present invention include sanitary pests such as dust mites, flies, roaches, cockroaches, fleas, bed bugs, and lice, ticks, house dust mites, ringworm mites, wasps, midges, butterfly flies, centipedes, and lice. Examples include unpleasant pests such as termites, bark beetles, and wood beetles, and grain storage pests such as crucian carp mites, brown grass moths, and brown weevils. Therefore, the insect repellent sheet of the present invention can be very effectively used to improve the safety and hygiene of the living environment and protect stored grains, etc. from these pests.

The sheet material for the insect repellent sheet of the present invention is paper.

Examples include cloth, nonwoven fabrics, synthetic resin sheets, and composite materials thereof. Examples of the synthetic resin sheet include a polyethylene sheet, a polypropylene sheet, a nylon sheet, a polyvinylidene chloride sheet, a polyurethane sheet, and a cellophane sheet.

The insect repellent sheet of the present invention is obtained by coating or spraying a liquid agent containing one and/or two or more of obacunone, norimin, limonin, deoxylimonin, deacetyl norimin, and limonexiic acid as active ingredients on a sheet material, and then drying. .

Examples of liquid preparations include liquid preparations or emulsions in which the above-mentioned active ingredients are dissolved in an organic solvent. Examples of organic solvents include /\\logenated hydrocarbons such as chloroform and dichloromethane; methyl ethyl ketone and acetone-stopped ketones; esters such as ethyl acetate; ethers such as methyl ether and ethyl ether; methanol, ethanol, propatool,
Alcohols such as isopropanol; hydrocarbons such as benzene, toluene, xylene, etc.

Various surfactants and the like may be added to these organic solvents as necessary.

The emulsion is prepared by mixing and emulsifying the above-mentioned active ingredients, the above-mentioned organic solvents, various surfactants, etc., and water, if necessary.

Examples of the above-mentioned surfactants include various types of surfactants, higher alcohol sulfates, sodium alkylsulfonates, sodium alkylarylsulfonates, quaternary ammonium salts, oxyalkylamines, fatty acid esters, polyalkylene oxides, etc. .

By incorporating other active ingredients into the insect repellent sheet of the present invention, the amount of existing synthetic insect repellent substances used can be reduced. Examples of other active ingredients used in combination include pyrethroid insecticides, organophosphorus insecticides, and pest repellents.

The insect repellent sheet of the present invention has extremely high safety, can be freely selected in size and shape, and can be used for various insect repellent applications. Because it is extremely safe, it can be used without any problems in applications where there is a high possibility of human contact or in food packaging. For example, the bottom of the closet.

Can be placed under drawers of dressers, under clothes boxes, under 2 storage boxes in the kitchen, under 2 tatami mats under carpets, or under floors to prevent sanitary pests, unpleasant pests, wood pests, etc.
It can be used as packaging material for costumes to protect them from pests. Further, by processing the insect repellent sheet of the present invention and using it as a packaging material for stored grains, fruits, etc., it is beneficial to prevent stored grain pests and the like.

The amount of active ingredients contained in the insect repellent sheet of the present invention is determined as appropriate and is not particularly limited, but is generally about 0.01 to 5.
It is preferable to set it in the range of weight %.

[Effect]

Next, Examples and Test Examples of the present invention will be shown.

Example 1 After defatting 800 g of dried seeds of Naramidan three times with five times the amount of petroleum ether, 10 times the amount of dichloromethane was added and extraction was performed three times at room temperature. The resulting extraction mixture was filtered and concentrated to dryness using a rotary evaporator to obtain a brown oily substance. A small amount of dichloromethane was added to this oil to dissolve it, and then excess petroleum ether was added to obtain 7.8 g of pale yellow precipitate. This precipitate was purified by silica gel column chromatography (Silica gel BW-300 manufactured by Fuji Davison Chemical Co., Ltd., eluent: chloroform:acetone = 9:1), containing obacunone LOOmg, limonin 1.0g, Noriminf 38E & deoxylimonin. 90 mg of deacetyl nomiline and 8 mg of limonexiic acid were obtained.

Example 2 A solution prepared by dissolving a prescribed amount of obakunon in chloroform was uniformly applied to a filter paper with a diameter of 90 mm (manufactured by Toyo Roshi Co., Ltd., 1 weight 600 mg), and then air-dried to obtain an insect repellent sheet of the present invention. . The content of obakunon in this insect repellent sheet was 3 mg.

Example 3 A solution prepared by dissolving a prescribed amount of Norimin in chloroform was mixed with a 90 mm diameter filter paper (2 weight 60 mm manufactured by Toyo Roshi Co., Ltd.).
0 mg) was applied uniformly and air-dried to obtain an insect repellent sheet of the present invention. The content of norimin in this insect repellent sheet is 3m.
g.

Example 4 A solution prepared by dissolving a prescribed amount of limonin in dichloromethane was sprayed uniformly onto a piece of kraft paper (weight 80 g) with a diameter of 1 m, and then air-dried to obtain an insect repellent sheet of the present invention. The content of limonin in is approximately 400 mg.

Example 5 A solution prepared by dissolving a prescribed amount of Bacteria spp. in ethyl acetate was sprayed uniformly onto a nonwoven fabric (weight 30 g) with a diameter of 1 m'' and air-dried to obtain an insect repellent sheet of the present invention. The content of obakunon in the insect repellent sheet is approximately 200 mg.

Test Example 1 The obakunon-containing insect repellent sheet prepared in Example 2 was placed in 12 beakers, and 100 Japanese termites were placed therein, and the degree of feeding damage to the sheet was observed.
The mortality rate of termites was determined. As a control, a similar test was conducted on filter paper not coated with obacunone.

All the termites in the insect-proof sheet area died after 20 days. The insect-proof sheet at that time suffered no feeding damage at all. All of the termites in the control plot were still alive 20 days later. In addition, damage caused by termites was clearly observed on the filter paper. The mortality rate (%) is shown in Table 1.

Table 1 Test Example 2 The Norimin-containing insect repellent sheet prepared in Example 3 was placed in 12 beakers, and 100 Yamato termites were placed therein, and the degree of feeding damage to the sheet was observed, and the death of the termites was observed. The rate was calculated.

As a control, a similar test was conducted on filter paper not coated with Nomilin.

All the termites in the insect-proof sheet area died after 20 days. The insect-proof sheet at that time suffered no feeding damage at all. All of the termites in the control plot were still alive 20 days later. In addition, damage caused by termites was clearly observed on the filter paper. The mortality rate (%) is shown in Table 2.

Table 2 Test Example 3 The insect repellent sheet containing obakunon prepared in Example 5 was cut into a circle with a diameter of 10 cm, placed in the bottom of 11 plastic cups with lids, and 100 adult woolly mites were placed on top of it to shield it from light. It was left standing at 25°C. The number of surviving woolly mites after 3 days was 9. In addition, the number of survivors in the control containing no obacunone was 95.

〔Effect of the invention〕

As is clear from the above test examples, the insect repellent sheet of the present invention exhibits excellent insect repellent effects against a wide range of insect pests, and is extremely safe.

Claims (1)

[Claims] (1) An insect repellent sheet containing one or more of obacunone, norimin, limonin, deoxylimonin, deacetyl norimin, and limonexiic acid.