JPH08283102A - Mosquito-repellent incense - Google Patents

Abstract

PURPOSE: To obtain a good mosquito-repellent incense containing a nitrate salt in a specific amount, having a suitable combustion rate, and not going out during the combustion. CONSTITUTION: This mosquito-repellent incense contains a nitrate salt in an amount of 0.01-5wt.%, especially 0.05-3wt.%. The nitrate salt includes alkali metal nitrates such as potassium nitrate and sodium nitrate, alkaline earth metal nitrates such as calcium nitrate and barium nitrate, and ammonium nitrate. A pyrethroid compound (e.g., pyrethrin) excellent in safety is preferably used as the insecticidal activity ingredient compound of the mosquito-repellent incense in an amount of 0.01-2wt.% based on the mosquito-repellent incense. The mosquito-repellent incense is obtained by mixing the insecticidal activity component compound or its formulation product, a combustion-assisting agent, a binder, a nitrate salt. etc., adding water to the mixture, kneading the mixture, molding the kneaded product by a molding machine such as a press molding machine, an extrusion molding machine or an injection molding machine, and subsequently drying the molded product.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a mosquito coil.

[0002]

2. Description of the Related Art Conventionally, mosquito coils have been prepared by mixing insecticidal components such as pyrethroid compounds with a combustion-supporting agent such as pyrethrum extract powder (dust powder), adding a binder such as tab powder and water, and kneading. It has been dried and manufactured.

By the way, the tab powder is a dry powder of leaves and bark of Tabuki which is a tree of the genus Tabuki of the family Asteraceae.
Proposals have been made to use a binder such as starch in order to substitute a raw material having a better availability.

[0004]

However, when a binder such as starch is used, the mosquito coil may disappear during the burning, and there is a need for improvement.

[0005]

According to the present invention, 0.01 to 5% by weight of nitrate is contained in mosquito coil, preferably 0.05 to 5% by weight.
By containing 3% by weight, it is possible to obtain a good incense which has an appropriate burning rate and does not disappear during burning. As the nitrate used,
Examples thereof include alkali metal nitrates such as potassium nitrate and sodium nitrate, alkaline earth metal nitrates such as calcium nitrate and barium nitrate, and ammonium nitrate.

As the insecticidal active ingredient compound used in the mosquito coil according to the present invention, it is preferable to use a pyrethroid compound excellent in safety. Specific examples thereof include:
For example, pyrethrin, allethrin, pralethrin, transfluthrin, resmethrin, flamethrin, empentrin, terrarethrin, phthalthrin and the like can be mentioned. These insecticidal active ingredient compounds are usually found in mosquito coils.
It is contained in an amount of 0.01 to 2% by weight. The pesticidal active ingredient compound is, if necessary, formulated into an emulsion, an oil, a microencapsulated preparation, an inclusion preparation, etc., and mixed into another incense base material.

The mosquito coil according to the present invention usually contains, in addition to the insecticidal active ingredient compound and nitrate, a combustion-supporting agent, a binder, and if necessary, a synergist, a pigment, a mildew-proofing agent and a fragrance. Examples of the combustion-supporting agent include sandalwood powder, sandalwood powder, camphor powder, peach powder, cedar powder, willow powder, springwood powder, honoki powder, linden powder, spruce powder, yellow poplar powder, wig powder, acacia powder, porcupine powder, Lobster powder, willow powder,
Sawagurumi powder, Nezuko powder, Kiri powder, Shioji powder,
Wood powder such as balsa powder, lauan powder, birch powder, citrus tree powder, shiitake mushroom hod tree powder, asteraceae plant powder,
Rubiaceae plant powder, Loniceraceae plant powder, Mesaceae plant powder, Ginkgoaceae plant powder, Labiatae family powder
Examples include dry powders of Fusariumaceae plant powders, Apiaceae plant powders, Gramineae plant powders, Moraceae plant powders, Asteraceae plant powders, pyrethrum extract powders (cass flours), etc. The above is mixed and used. The content of the combustion-supporting agent in the mosquito coil is usually 45 to 90% by weight.

As the binder, for example, tab powder, starch,
Processed starch, tragacanth gum, gum arabic, guar gum, gamville extract powder, natural polymers such as casein, polyvinyl alcohol, polyacrylamide, sodium polyacrylate, polyethylene oxide, polyvinylpyrrolidone, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, Examples thereof include synthetic polymers such as carboxymethyl cellulose salt, carboxymethyl starch salt, dialdehyde starch, and cationic starch, which may be used alone or in admixture of two or more. The content of the binder in the mosquito coil is
It is usually 5 to 50% by weight.

The pigments used in the mosquito coil according to the present invention include, for example, malachite green and other organic pigments, inorganic pigments and dyes.
Examples thereof include acids such as benzoic acid, sorbic acid, dehydroacetic acid, p-hydroxybenzoic acid, o-phenylphenol and the like, salts and esters thereof, and the incense stick usually contains 2% by weight or less of each.

The mosquito coil according to the present invention is usually prepared by mixing a compound having an insecticidal active ingredient or its formulation, a combustion-supporting agent, a binder, a nitrate, etc. and kneading the mixture with water, followed by a press molding machine, an extrusion molding machine, It is manufactured by molding with a molding machine such as an injection molding machine and drying.

[0011]

EXAMPLES Next, the present invention will be described more specifically by way of examples, but the present invention is not limited to the following examples. First, a production example of the mosquito coil according to the present invention will be shown. Production Example 1 Allethrin emulsion [allethrin 0.3 part by weight, Hymal BL
Z (Matsumoto Yushi-Seiyaku Surfactant) 0.0347 parts by weight, Himar 1002Z (Matsumoto Yushi-Seiyaku Surfactant) 0.0039 parts by weight and Solvesso 150 (Exxon Chemical organic solvent) 0.04
64 parts by weight] 0.385 parts by weight, 50 parts by weight of dust,
Add 10 parts by weight of tab powder, 15 parts by weight of α-starch, 0.3 part by weight of malachite green, 0.2 part by weight of sodium dehydroacetate, 0.5 part by weight of potassium nitrate and wood flour to make the whole.
The mixture was mixed as 100 parts by weight, an appropriate amount of water was added thereto, well kneaded, extruded and dried to obtain a mosquito coil with a length of 80 cm.

Production Example 2 A mosquito coil was obtained in the same manner as in Production Example 1 except that 1 part by weight of potassium nitrate was used. Production Example 3 A mosquito coil was obtained in the same manner as in Production Example 1 except that 2 parts by weight of potassium nitrate was used. Production Example 4 A mosquito coil was obtained in the same manner as in Production Example 1 except that 3 parts by weight of potassium nitrate was used. Production Example 5 A mosquito coil was obtained in the same manner as in Production Example 1 except that 5 parts by weight of potassium nitrate was used.

Next, a production example of insecticidal incense used for comparison in the test examples described below will be shown as a comparative example. Comparative Example 1 A mosquito coil was obtained in the same manner as in Production Example 1 except that potassium nitrate was changed to 0.5 parts by weight and wood flour was used.

Next, a test example will be shown. Test Example When each of the mosquito coiled incense having a length of 80 cm obtained in the above Production Example and Comparative Example was used for burning, each mosquito coiled incense obtained in Production Examples 1 to 5 was burned to the end. However,
The mosquito coil obtained in Comparative Example 1 disappeared after burning about 10 cm.

[0015]

EFFECTS OF THE INVENTION The mosquito coil according to the present invention has an appropriate burning rate and is a good one which does not disappear during burning.

Claims (2)

[Claims] 1. A mosquito coil according to claim 1, which contains 0.01 to 5% by weight of nitrate. 2. A mosquito coil according to claim 1, which contains 0.05 to 3% by weight of nitrate.