JP2602694B2 - Smoke composition - Google Patents

Description

The present invention relates to an improved smoke composition and a method for producing the same. More specifically, the present invention relates to a smoke composition which has ascorbic acid or a salt thereof added to a smoke composition containing nitrocellulose as a heat-generating base to improve the smoke rate, and a method for producing the composition.

[Conventional technology]

The smoke agent is composed mainly of an exothermic base and an active ingredient, an insecticidal substance or a bactericidal substance, and is further mixed, kneaded, and granulated by adding a bulking agent, a binder, etc., as necessary, to obtain a granular form. It was made. This smoke agent uses the heat of combustion or the heat of decomposition generated by burning or decomposing the exothermic base at the time of use to diffuse the active ingredient within a short period of time, thereby killing or killing insects. Has been widely used.

Conventionally, exothermic bases used in smoking agents include a mixture of an oxidizing agent such as potassium chlorate and potassium nitrate and a burning agent such as starch and lactose, and a blowing agent such as azodicarbonamide. Or nitrocellulose is known.

However, these exothermic bases, depending on the type of active ingredient, the thermal decomposition of the active ingredient during smoking is too severe,
The smoke rate defined below is about 50% or less, and there is a problem that a desired insecticidal effect or a bactericidal effect cannot be sufficiently obtained.

In particular, when a mixture of the above-mentioned oxidizing agent and burning agent is used, and when a foaming agent is used, the smoke formation rate tends to be low (see Table 1 Comparative Example 2 and 3
reference).

Therefore, various attempts have been made to increase the smoke rate. For example, JP-A-59-25305 discloses that Sn-butyl-S'-n-tert-butylbenzyl N as an active ingredient. A phenolic antioxidant such as 2,6-di-tert-butyl-4-methylphenol is added to a smoke agent containing -3-pyridylthiocarboimidate and nitrocellulose as an exothermic base. Attempts have been disclosed. However, although this approach gives good results in the case of the active ingredient of the present invention, in the case of other active ingredients, for example, isopropyl 3,4-diethoxyphenylcarbamate (generic name: dietofencarb),
There was a problem that a sufficient smoke rate could not be obtained (see Comparative Example 2 in Table 1 in the test examples described later).

[Problems to be solved by the invention]

The present invention in view of such circumstances, as a result of repeated studies to provide a smoke composition showing a higher smoke rate,
By adding ascorbic acid or a salt thereof to a smoke composition containing nitrocellulose as a heat-generating base, it has been found that a high smoke rate can be obtained, and the present invention has been completed.

[Means for solving the problem]

That is, the present invention provides a composition for smoking characterized by containing an active ingredient, nitrocellulose and ascorbic acid or a salt thereof, and a method for producing the same.

Ascorbic acid salts used in the present invention include, for example, sodium salts and potassium salts.

In the present invention, ascorbic acid or a salt thereof is contained in an amount of 1 to 30% by weight, preferably 3 to 20% by weight, based on the total weight of the composition for smoking.

In the present invention, nitrocellulose is preferably contained within the range of 25 to 40% by weight based on the total weight of the composition for smoking.

The active ingredient used in the present invention is not particularly limited as long as it is an insecticide or a bactericidal substance which can be released by heating for a short time.

The content of the active ingredient in the composition varies depending on the type, activity and the like of the ingredient, but is usually used in the range of 1 to 60% based on the total weight of the preparation.

 Next, specific examples of the active ingredient used in the present invention will be shown.

[Disinfectant] bis (dimethylthiocarbamoyl) disulfide, "generic name: thiram", isopropyl 3,4-diethoxyphenylcarbamate, "dietophencarb", N- (trichloromethylthio) -4-cyclohexane-1,2-dicarboxy Imide, "captan" 6-methylquinoxaline-2,3-dithiocarbonate, "morestane" tetrachloroisophthalonitrile, "daconyl" 3,
3'-ethylenebis (tetrahydro-4,6-dimethyl-2H
-1,3,5-thiadiazine-2-thione), "milneb"
etc.

[Insecticide] 0- (4-bromo-2,5-dichlorophenyl) 0,0-dimethylphosphorothioate, "bromophos" .0,0-dimethyl-0- (3,5,6-trichloro-2-pyridyl) phosphorothioate , "Chloropyrifosmethyl" 2-chloro-1- (2 ', 4,5-trichlorophenyl) -vinyldimethylphosphate, "tetrachlorovinphos" 2,2,2-dichlorovinyldimethylphosphate, "DDVP" 0,0-diethyl 0-2-isopropyl-4-methyl-6-pyrimidinyl thiophosphate, "diazinone", 0-isopropoxyphenyl methylcarbamate, "PHC", pyrethrin, dl-3-allyl-2-methyl -4-oxo-2
-Cyclopentenyl dl-cis / trans-chrysanthemate, "aresulin" 3-phenoxybenzyl dl-
Cis / trans-3- (2,2-dichlorovinyl) -2,2-
Dimethyl-1-cyclopropanecarboxylate, "permethrin" and the like.

In the smoke composition of the present invention, if necessary, a bulking agent,
Binders, combustion regulators and the like can be added.

Examples of fillers include clay, talc, diatomaceous earth,
Bentonite, kaolin and the like can be used.

As the binder, for example, carboxymethylcellulose, methylcellulose, ethylcellulose, hydroxypropylmethylcellulose, starch, polyvinyl alcohol and the like can be used.

Melamine or a derivative thereof such as industrial melamine, melamine nitrate, and melamine formalin resin can be used as the combustion regulator.

The amounts of these additives are not particularly limited, and may be appropriately determined experimentally and used. In addition, a phenolic antioxidant can be added to the composition of the present invention. When added, it may be used within a range of 1 to 20% based on the total weight of the composition preparation.

〔Example〕

Hereinafter, the present invention will be specifically described with reference to Examples, Comparative Examples, and Test Examples, but the present invention is not limited thereto.

In the Examples and Comparative Examples, “parts” means “parts by weight”.

Example 1 10 parts of dietofencarb, 5 parts of ascorbic acid, 36 parts of nitrocellulose, 10 parts of melamine, 5 parts of carboxymethylcellulose and 34 parts of clay are mixed and stirred in a grinder. After about 25 parts of water is added to the mixture and kneaded, the mixture is granulated using a granulator (die diameter 2.5 mm). Approximately 6 obtained granules
Dried at 0 ° C. to obtain granules.

Example 2 Granules were obtained in the same manner as in Example 1 except that ascorbic acid was 10 parts and clay was 29 parts.

Example 3 Granules were produced in the same manner as in Example 1 using 20 parts of molestan, 5 parts of sodium ascorbate, 33 parts of nitrocellulose, 5 parts of melamine, 4 parts of polyvinyl alcohol and 33 parts of kaolin.

Example 4 Granules were produced in the same manner as in Example 1 using 30 parts of daconil, 3 parts of ascorbic acid, 3 parts of sodium ascorbate, 34 parts of nitrocellulose, 3 parts of hydroxypropylmethylcellulose, 3 parts of melamine and 24 parts of talc. did.

Example 5 Granules were produced in the same manner as in Example 1 using 7 parts of bromophos, 4 parts of potassium ascorbate, 30 parts of nitrocellulose, 3 parts of melamine, 5 parts of starch and 51 parts of diatomaceous earth.

Example 6 Granules were produced in the same manner as in Example 1 using 7 parts of chlorpyrifosmethyl, 10 parts of ascorbic acid, 34 parts of nitrocellulose, 20 parts of melamine, 3 parts of methylcellulose and 26 parts of diatomaceous earth.

Example 7 10 parts of DDVP, 3 parts of ascorbic acid, 1 part of 2,6-di-tert-butyl-4-methylphenol, 35 parts of nitrocellulose
, 3 parts of melamine, 3 parts of hydroxypropylmethylcellulose and 45 parts of clay were used to produce granules in the same manner as in Example 1.

Example 8 Granules were produced in the same manner as in Example 1 using 5 parts of PHC, 5 parts of sodium ascorbate, 33 parts of nitrocellulose, 5 parts of melamine, 3 parts of ethyl cellulose and 49 parts of clay.

Example 9 Granules were produced in the same manner as in Example 1 using 6 parts of allethrin, 6 parts of ascorbic acid, 33 parts of nitrocellulose, 10 parts of melamine, 5 parts of carboxymethylcellulose and 40 parts of clay.

Example 10 Granules were produced in the same manner as in Example 1 using 5 parts of permethrin, 10 parts of ascorbic acid, 33 parts of nitrocellulose, 3 parts of melamine, 4 parts of carboxymethylcellulose, 3 parts of starch and 42 parts of diatomaceous earth. .

(Comparative example)

Comparative Example 1 Excluding 5 parts of ascorbic acid from the components of Example 1,
Granules were produced in the same manner as in Example 1 except that 39 parts of clay was used.

Comparative Example 2 10 parts of dietofencarb, 2,6-di-tert-butyl-
Granules were prepared in the same manner as in Example 1 using 10 parts of 4-methylphenol, 36 parts of nitrocellulose, 10 parts of melamine, 5 parts of carboxymethylcellulose and 29 parts of clay.

Comparative Example 3 10 parts of dietofencarb, 18 parts of potassium chlorate, 15 parts of starch, 5 parts of carboxymethylcellulose, clay 52
Parts were granulated in the same manner as in Example 1.

Comparative Example 4 Diethofencarb 10 parts, azodicarbonamide 40
Parts, 6 parts of potassium chlorate, 5 parts of starch, 4 parts of carboxymethylcellulose and 35 parts of clay were granulated in the same manner as in Example 1.

Comparative Example 5 From the components of Example 3, sodium ascorbate 5
A granule was produced in the same manner as in Example 3 except that kaolin was used in an amount of 39 parts except for parts.

Comparative Example 6 Granules were produced in the same manner as in Example 5 except that 4 parts of potassium ascorbate was removed from the components of Example 5 and diatomaceous earth was 55 parts.

Comparative Example 7 3 parts of ascorbic acid were removed from the components of Example 7,
Granules were produced in the same manner as in Example 7 except that the amount of clay was changed to 49 parts.

Comparative Example 8 From the components of Example 8, sodium ascorbate 5
A granule was produced in the same manner as in Example 8 except that the clay was 55 parts, except for the parts.

Comparative Example 9 Excluding 10 parts of ascorbic acid from the components of Example 10,
Granules were produced in the same manner as in Example 10 except that diatomaceous earth was used in 52 parts.

(Test example)

The following test examples demonstrate that the smoke composition of the present invention exhibits a higher smoke rate than conventional products. The test results are shown in Table 1.

Test Method: 50 g of each of the granules of Examples 1 to 10 and Comparative Examples 1 to 9 was placed in an aluminum bag, packaged, and used as a sample. Samples with an internal volume of 5800
After smoking in the room and uniformly stirring the room air with a fan, about 20 room air is passed through a glass tube filled with silica gel for chromatography using a vacuum pump to adsorb the active ingredient to the silica gel. Next, the active ingredient is eluted and recovered with acetone, quantified by gas chromatography, and the content (Ag) of the collected active ingredient in the indoor air is determined. On the other hand, the content (B%) of the active ingredient in the sample is determined by a gas chromatography method according to a conventional method. Based on these values, the smoke rate is determined by the following equation.

[Effects of the Invention] As is clear from the above, the smoke composition of the present invention has an improved smoke rate compared to the conventional product, and has a high smoke rate. Therefore, by using the smoke composition of the present invention, a more effective insecticidal and sterilizing method than the conventional one has been realized.

Claims (5)

(57) [Claims] 1. A smoke composition comprising an active ingredient, nitrocellulose and ascorbic acid or a salt thereof. 2. The smoke composition according to claim 1, wherein a filler, a binder and a combustion regulator are mixed. 3. The smoke composition according to claim 1, wherein the content of ascorbic acid or a salt thereof is 1 to 30% by weight based on the total weight of the preparation. 4. Smoke smoke obtained by mixing and kneading an active ingredient, nitrocellulose, ascorbic acid or a salt thereof, and if necessary, a bulking agent, a binder, a combustion regulator and the like, followed by granulation. A method for producing a composition for use. 5. The method according to claim 4, wherein the content of ascorbic acid or a salt thereof is 1 to 30% by weight based on the total weight of the preparation.