ITRM940149A1 - DEVICE FOR VOLATILIZING AN ACTIVE INGREDIENT IN THE AIR, BY INCOMPLETE COMBUSTION. - Google Patents

Description

DESCRIPTION

accompanying an application for an invention patent

entitled: "Device for volatilizing an active ingredient in the air by incomplete combustion".

The present invention relates to a :! device for volatilizing an active ingredient into the air by incomplete combustion (Senko); containing silicon carbide and a composition used as a material for senko.

Senko, therefore, refers to a substance for volatilizing an active ingredient in the air by Incomplete combustion. Usually, specific examples of senko include an insecticidal senko called a mosquito coil, and a scent-emitting senko called an incense stick which includes for example u senko for the Buddhist ceremony called; scented stick to burn in Chinese temples (joss-stick).

To date, various types of senko containing an insecticidal active ingredient or an active ingredient. tive emitting a perfume have been used. Gene-: So, a substantial part of these active ingredients contained in the senko is broken down by the

heat of combustion and the part that actually

volatilizes is limited.

The present invention has been carried out

to improve the rate of volatilization of the active ingredient in the senko, and provides a senko

containing silicon carbide and a composition

used as a material for senko.

The senko of the present invention contains

silicon carbide usually in the form of a

powder, and the silicon carbide content is

d.allM. to 3.0% by weight, preferably from 1 to

20.% by weight of the total weight of the senko. II.senko

of the present invention includes other materials

commonly used for senko as bulking agents. organics, binding agents and also pigments e

static mushroom agents as needed,

The active ingredient used in insect senko-;

cida to kill flies., mosquitoes, etc., what a gen-!

So it is referred to as a spiral against;

le [mosquitoes, includes pyrethroid compounds such as

pyrethrin, allethrin, prallethrin, benflutrin

(transfluthrin), resmethrin, empentrin, theirs

stereoi somer 1 active and mixtures of these stereo-, isomers. The Active Ingredient used in the senko that. emits perfume Includes 1 natural perfumes, synthetic perfumes and the like. The content of these active ingredients is generally 0.01 to 1.0 parts by weight of the total weight. senko.

These Active Ingredients are blended with the senko materials as they are or after. have been formulated in emulsifying concentrates, oily sprays, microencapsulated formulations, various formulations of inclusion complexes, etc. and if necessary diluted with a solvent or vegetable oil._

The solvent includes those having a boiling point of 100 ° C or more and a vapor pressure of 1 mm Ho or more at 20 ° C, which are selected from the group consisting of liquid paraffin, halitic hydrocarbons having 10 or more carbon atoms. , aromatic hydrocarbons, halogenated hydrocarbons having 3 or p10 carbon atoms, alcohols and esters having 3 or more carbon atoms.

Vegetable oil includes avocado oil, almond oil, Persian oil, walnut oil, palm oil, olive oil, castor oil, peanut oil, rapeseed oil, rso crsca oil, sesame oil, cottonseed oil, corn oil, soybean oil ,! tung oil, linseed oil, pearl oil ,; torreya seed oil, paper oil, oil of; bran, capoc oil, benzoin oil, oil of. sasanqua, tea seed oil, and camellia oil.

A preferred organic bulking agent used as a senko material includes those which emit little smoke or little unpleasant odor upon combustion at relatively low temperatures. It includes, for example, dry powders of juniper, woody parts. sandalwood, camphor tree, cedar; Japanese, willow, Kalopanax pictus, Magnolia; hypoleuca, cedar tree, orange peel, '[fir, yellow poplar, Japanese Judas tree,; acacia, poplar, Tilia Miqueliana, Toisusu Urbaniana, Pterocarya rhoifo.lla, Thuja Stantìishii, paulownia, 'Fraxinus Spaethiana, lauan, white birch, fruits: citrus, woods for the shiitake mushroom, etc .; the powders s.ecch.e di-pia.n.t. and like the ..Co..mpos..itae, Umbelliferae, Gramineae, Meiiaceae, Thymelaeaceae, Myrta-, ceae, Moraceae, Oleacear, Labiatae, Rubiaceae ,; Caprifol 1aqeae and rice husks; and dry plant extract powders such as pyrethrum stem extract obtained by pyrethrum extraction. These organic bulking agents can be used in admixture. -The binder used as material for senko includes natural polymers such as starch, mannan, powdered algae extracts, Hibiscus-Manihot powder, dredging gum,, gum arabic, gum.-g.uar -powdered gambir extracts, bark extracts of Machilus thumbergil in powder form (called tabu powder) and casein and synthetic polymers such as poly-livinyl alcohol, polyacrylamide, polyacrylate. di-sodium, polyethylene oxide, polyvinylpyrrolidone, methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose salt, carboxymethyl starch salt, dialdehyde starch and cationic starch. These binders can be used in blends.

The pigment used as the material for senk includes the organic pigments (for example, the inorganic, crystalline and similar pigments). salts, para-hydroxybenzoic acid esters, propionic acid, ortho-phenylphenol and silicones. These materials can be used in a mixture of two or more of them.

The senko of the present invention can be produced by mixing the above materials for the senko, kneading the mixture with water, extruding and subjecting the kneaded product to molding to obtain optional shapes with extraction and molding machines, and then drying in the air the product or drying it with dryers.

. The present invention will be illustrated more specifically with reference to the following examples, but it is not to be considered that it is limited thereto.

Production example

0.09 parts by weight of an emulsifiable concentrate containing prallethrin (insecticidal compound. Pyrethrum), [comprising 0.088 parts by weight of; prallethrin, 0.01 parts by weight of Hymal BLZ (a surfactant produced by Matsumoto Yushi-Seiyaku Co., Ltd.) - and 0.009 parts by weight of Solvesso 150_ (a solvent produced by Exxon. Chemical CoJ], 10 0 parts by weight of silicon carbide powder, 4.0.0 parts by weight of pyrethrum stem extract, .30.0 parts by weight of tabu powder, .0.3 parts by weight, of malachite green and 0.2 parts by weight of sodium dehydroacetate were mixed together, and the total weight of the mixture was brought to 1-00 parts by weight with Japanese cedar powder. Appropriate water was added to the resultant fin which was then thoroughly slurried, extruded and dried to obtain a spiral against the tusks.

Example of comparison

A mosquito coil was obtained in the same manner as the manufacturing example except that 50.0 parts by weight of pyrethrum extract was used instead of 10.0 parts by weight. weight of silicon carbide powder and 40.0 parts by weight of pyrethrum layers.

Test example

Using the spirals against mosquitoes obtained in the production example and in the example of paragpne, the degree of volatilization of prallethrin as an active ingredient was measured as follows.

The weighed sample is fixed to a senko holder and burned into a measuring instrument (a wide-mouth funnel). The smoke emitted by burning is captured by adsorbing the smoke by silica gel while drawing in the smoke using a JLS pj ran te pump. After that, the silica gel, silica gel, etc. are washed with methanol, and the amount of pralletrol in the methanol media is determined by gas eromatography.

The results of the measurement of the degree of volatilization are shown in table 1

Table 1.

The senko of the present invention can efficiently volatilize an active ingredient and can be used in a variety of applications.

Claims (1)

CLAIMS 1. Senko which includes silicon carbide. - ~ r 2. Senko according to claim 1, in which; one active ingredient is insecticide. 3. Senko according to claim 1, wherein an active ingredient is a pyrethroid compound. -4. Senko according to claim Wherein an active ingredient is prallethrin. 5. Senko according to claim 1, which is a mosquito coil. 6. -Composition which includes -silicone carbide to-produce a senko. 7. Composition according to claim 6, which comprises silicon carbide, ingredient. active organic bulking agent and binder.-8.-Composition according to claim 7, wherein the active ingredient is an insecticide 9 Method for improving the degree of volatilization of the active ingredient in a senko, which adds an effective amount of carbide of silicon with senko 10.Use of silicon carbide to improve the degree of volatilization of the active ingredient in a senko.