JPH03111477A - Adhesive with mothproof and antifungal effect - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an adhesive having insect repellent and antibacterial effects, which is characterized by containing cypress oil as an active ingredient.

[Conventional technology]

Eliminating pests and harmful bacteria is an essential issue for humans to maintain a healthy life, and various insecticides and fungicides have been developed in the fields of food, medicine, toiletries, etc., including agricultural chemicals. However, since they are used in close contact with the human body, there has been a strong demand for highly safe drugs and methods.

Adhesives used for construction plywood, wall materials, carpets, sheets, etc. contain insect repellents and antibacterial agents, as well as adhesive bases such as polyvinyl alcohol (PVA), vinyl acetate, acrylic, and vinyl chloride. It is used in dispersed or emulsified form.

As insect repellents, organophosphorus phosphate compounds, phosphorothiolate compounds, phosphonate compounds, fluorophosphate compounds, Villethroy F-based synthetic pyrethroid compounds, synthetic pyrethrin compounds, and carbamate compounds (Japanese Patent Application No. 51-24016), Phenol-based compounds (Patent No. 991999), chlorophenyl-based compounds, boric acid ester-based compounds (Patent Application No. 1987-144)
Synthetic drugs such as 354) are known.

Antibacterial agents include benzimidazolyl carbamate compounds (Patent No. 1363234), dithiocarbamate compounds (Japanese Patent Application No. 51-24016), and dehydroacetic acid compounds (Patent No. 1363234).

1118164) etc. are used.

[Problem to be solved by the invention]

The above-mentioned drugs are highly toxic, and there have been reports of cases in which they caused inflammation when they came into contact with the skin, and in particular, organophosphorus drugs have high neurotoxicity and are highly transdermally absorbable. However, most of these compounds are not fully effective unless they are in direct contact with the body, so only local effects can be expected.

Furthermore, although pyrethroid compounds are transpirable, they are effective against limited types of insect pests, and their effects are small compared to others.

[Failure to solve the problem]

In view of the above-mentioned circumstances, the present inventors have conducted intensive research on natural ingredients that are highly safe and have excellent insect repellent and antibacterial effects. Contains Aomori Hiba (Thu)
jopsis dolabrata var.

We have discovered the essential oil (hiba oil) of the Japanese cypress tree (Honda) and established a method for effectively incorporating it into adhesive compositions.

The present invention is an adhesive having insect repellent and antibacterial effects, which is characterized by containing Hiba oil as an active ingredient. Oil is added as an O/W emulsion or solubilizer to oil-based adhesive bases such as acrylic and vinyl chloride, and cypress oil is added to insoluble carriers such as porous silica gel, zeolite, activated clay, activated carbon, and cellulose. Adsorb it into the powder and mix it into a powder.

The amount of cypress oil added in the present invention is determined by the use of the adhesive and the sustainability of its effectiveness, and is difficult to be uniformly limited for general-purpose materials such as adhesives, but it ranges from 0.1 to 0.1 to the amount of adhesive. It is preferable to add 20%; if the amount of cypress oil added is less than 0.1%, the insect repellent and antibacterial effects will not be sufficiently exhibited, and if it is more than 20%, the function as an adhesive will be impaired. That will happen.

[Effect]

Hiba oil in the present invention is an essential oil obtained from Aomori Hiba wood waste and sawdust by steam distillation or carbonization, and has insect repellent properties in addition to antibacterial components such as carvacrol, hinokitiol (β-tsuyabushirin), and β-drapurin. Contains active ingredients such as citronel and trimethylnaphthalene, which has termicidal properties. In particular, hinokitiol has sublimation properties, so it not only exerts its effect upon contact like conventional adhesives containing insect repellents or antibacterial agents, but also exerts its effect over a wide range by volatilizing from the adhesive base. Is possible.

In addition, in terms of safety, Hiba oil has been proven to be extremely safe as the acute toxicity (LD) of hinokitiol, the main active ingredient, was 400 mg/Kg when injected into the thigh of a mouse. are doing.

The following examples will specifically explain the present invention, but do not limit the scope of the present invention.

〔Example〕

Example 1 An emulsion consisting of 48 parts by weight of water, 50 parts by weight of cypress oil, and 2 parts by weight of polyglycerin fatty acid ester was prepared, and 10 mj2 of vinyl acetate solution (
A product of the present invention was obtained by mixing with a 50% monomer solution. Pour 10g of the product of the present invention into a cup with a lid (capacity: 60mf!) and air dry at room temperature.
Termes 5 peratus), put cotton wool soaked in water to the inside of the lid with cellophane tape to prevent it from drying out, cover the lid and leave it in a dark place at 25"C for 24 hours. As a result of measuring the mortality rate after hours, as shown in Table 1, it exhibited excellent anticidal properties.

Table 1. Insecticidal effect on Yamato termites Example 2゜A predetermined amount of the same Hiba oil emulsion as in Example 1 was added to 20mj of an 18% by weight polyvinyl alcohol aqueous solution! The product of the present invention was prepared by mixing with The product of the present invention was poured into two cups with lids similar to those in Example 1 for 10 m, and after air-drying at room temperature, the German cockroach (Blattella germanica) was poured.
) were placed in a dark place at 25°C, and the mortality rate was measured after 72 hours. As shown in Table 2, excellent insecticidal properties were exhibited.

Table 2. Example 3: Insecticidal Effect on Chiba Cockroaches A product of the present invention was prepared by uniformly mixing 20 parts by weight of porous silica gel powder adsorbed with equal parts of cypress oil and 80 parts by weight of a commercially available acrylic adhesive. 0, then the peripheral part has a diameter of 9
The product of the present invention was attached and floated on the protruding parts of black paper cut into an 8-pointed star shape with a diameter of 2 cm at the center at 4 locations in one device so that the amount of cypress oil was 2 g/m. After preparing the test paper, stick an insect needle into the center of the test paper and hold the test paper in the air.
300 crucian carp mites, (Darmatop
ha. farinae) and the woolly mite (T.
yrophagus putresceectiae
) was left at room temperature, and when a considerable number of mites had moved, the test paper was observed on both the front and back sides, and the repellency rate was calculated from the total number of mites in the treated and non-treated areas according to the formula below. The test was conducted in triplicate, and the results showed a significant repellent effect as shown in Table 3 as an average value.

Number of mites in untreated area - Number of mites in treated area Repellent rate - Total number of ticks X100 (%) Table 3゜ For woolly leopard mites and woolly mites repellent effect against It was measured by the method.

Example 4 10 mf of agar medium was added to a cup with a lid (capacity 60 mj2), and one platinum loop of each microorganism was inoculated onto the medium. The lid was coated with a predetermined amount of the product of the present invention from Example 2, and after air-drying at room temperature, the inoculated cup was turned upside down and the lid was tightly attached. 37° in case of
C. Cultured for 1 day, and antibacterial activity was measured.

The products of the present invention were air-dried at room temperature for 0 days, 1 month, and 2 months, and the durability of antibacterial activity was also measured for each air-dried product.

The index of antibacterial activity was expressed as the amount of cypress oil content (mg) required for the product of the present invention of Example 2 to completely inhibit the growth of each microorganism in a space of 50 mJ2.

(Margins below) Table 4. Antibacterial activity against various microorganisms [Effect of the invention] The present invention can be used to produce building materials such as wallpaper and plywood, packaging materials such as cardboard boxes and decorative boxes, rugs such as carpets and carpets, paper products such as paper crafts, and furniture furnishings. This makes it possible to improve the safety and insect repellent and antibacterial effects of adhesives used in other applications, and also contributes to the effective use of resources.

Claims (1)

[Claims] An adhesive having insect repellent and antibacterial effects, characterized by containing cypress oil as an active ingredient.