JPH11246306A - Fumigant composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self-combustion continuation type fumigant capable of improving production cost and safety on production, capable of reducing the smell of a smoking gas generated on employment, having excellent chemical agent diffusivity and capable of improving indoor pollution by reducing the content of a combustion agent from a fumigant comprising the combustion agent and azodicarbonamide. SOLUTION: This fumigant composition comprises a combustion agent such as nitrocellulose in an amount of 1-20 wt.% based on the total weight of the composition, azodicarbonamide in an amount of 30-70 wt.%, and an azodicarbonamide decomposition-accelerating agent such as zinc stearate, magnesium stearate, zinc carbonate or zinc oxide. The fumigant composition has excellent the diffusivity of the chemical agent, can reduce the smell of the generated gas, has excellent production cost and excellent safety on production, and can improve indoor pollution.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

2. Description of the Related Art Hitherto, various fumigants or fumigants containing azodicarbonamide useful as a gas generating agent have been devised. Azodicarbonamide is an organic blowing agent having a self-extinguishing property as generally well known,
Even if a part of the preparation is heated by a heat source such as a match flame or an igniter to start a pyrolysis reaction, the pyrolysis reaction is stopped if the supply of heat from the outside is interrupted.

Accordingly, a self-combustion continual smoking agent containing azodicarbonamide generates a relatively large amount of heat due to decomposition of dinitrosopentamethylenetetramine, nitrocellulose, etc., and mainly burns a substance having self-combustion continuity. Used as a gas generating agent, and a mixture with azodicarbonamide was used as a gas generating agent.
issue). However, since these require a considerable amount of the main combustion agent which is dangerous to fire, etc., the production cost is increased due to safety measures in production, and the main combustion agent is not used. There was a problem such as the odor of smoke gas generated when burning.

[0003] To reduce the content of the main burning agent in the smoking agent, however, there have been problems such as a decrease in the diffusivity of the agent and the disappearance of the effect of the self-combustion continuity.

Furthermore, a smoke composition has been proposed in which azodicarbonamide is added with continuity of self-decomposition by adding a pesticide, azodicarbonamide and zinc oxide (JP-A-5-294803). In commercializing this composition as a smoking agent, further improvement in indoor pollution after use has been required. Further, it has been found that the smoking speed is greatly affected by the particle size and apparent specific gravity of the smoking agent, and more stable performance has been required.

[0005]

SUMMARY OF THE INVENTION In view of the above situation, the present invention reduces the content of a burning agent in a smoking agent containing a burning agent and azodicarbonamide, thereby reducing the production cost and the production cost. An object of the present invention is to provide a self-combustion continual smoking agent in which safety, odor of smoking gas generated during use is reduced, drug diffusion is excellent, and indoor pollution is improved.

[0006]

Means for Solving the Problems The present inventors have conducted intensive studies on a self-burning continuous smoking agent containing a burning agent and azodicarbonamide. As a result, zinc stearate and stearic acid were added to azodicarbonamide. By adding an organic or inorganic salt such as magnesium, zinc carbonate, zinc oxide or the like as an accelerator for decomposing azodicarbonamide, the content of a burning agent such as nitrocellulose to the smoke composition is reduced to 20% by weight or less. However, it has been found that the composition has continuity of self-combustion, is excellent in diffusibility of a drug, and is also improved in indoor contamination after use.

[0007] Further, the smoking agent composition of the present invention is prepared by adding 3350
The particle size is adjusted so that the ratio of the weight remaining on the 1700 μm sieve after passing through the 1 μm sieve is 60% or more, preferably 80% or more, and the apparent specific gravity is 0.6 to 0.8 g / ml. By doing so, it was found that the smoker composition was excellent in the volatilization rate of the drug into the air and reachability into the gap, and was adjusted to an appropriate smoking rate without the possibility of the user being smoked. .

[0008] That is, the present invention relates to the total composition weight,
An object of the present invention is to provide a smoking composition comprising 1 to 20% by weight or less of a burning agent, 30 to 70% by weight of an azodicarbonamide, and an azodicarbonamide decomposition accelerator. In more detail, the azodicarbonamide decomposition accelerator is one or more decomposition accelerators selected from the group consisting of zinc stearate, magnesium stearate, zinc carbonate, and zinc oxide. Agent composition. Furthermore, the particle size is from 1700 μm
The present invention relates to the above-mentioned smoke-absorbing composition, wherein the weight ratio of the smoke-absorbing granules having a size of 3350 μm is 60% or more and the apparent specific gravity is 0.6 to 0.8 g / ml.

The burning agent in the present invention may be any one which can be generally used as a burning agent for a smoking agent. Specifically, nitrocellulose, dinitrosopentamethylenetetramine, oxybisbenzenesulfonylhydrazide, Examples thereof include nitroguanidine, and a composition comprising an oxidizing agent such as potassium chlorate or ammonium nitrate and a combustible substance such as saccharides or wood flour.

As the burning agent of the present invention, nitrocellulose is particularly preferred.

The azodicarbonamide decomposition accelerator in the present invention refers to a fumigant or fumigant containing a burning agent and azodicarbonamide which improves the decomposition rate of the azodicarbonamide without lowering the decomposition temperature. Any material that satisfies the conditions may be used, and specific examples thereof include zinc stearate, magnesium stearate, zinc carbonate, and zinc oxide.

The above-mentioned compounds can be used alone or in combination of two or more.

[0013] Since these decomposition accelerators have different degrees of acceleration of thermal decomposition, they can be appropriately selected in accordance with their accelerating ability.
It is effective to add 1 to 50% by weight, preferably 0.1 to 20% by weight.

The content of the azodicarbonamide in the composition of the present invention is from 30 to 70 parts by weight based on the total weight of the smoking composition.
% By weight is preferred. When the content is less than 30% by weight, the volatilization rate of the drug is low, and when it is remarkable, the continuity of self-decomposition may be impaired. If the content exceeds 70% by weight, the amount of decomposition gas generated per unit time becomes too large due to the addition of the decomposition accelerator, and there is a problem in safety during production and storage.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The smoking composition of the present invention can be produced, for example, as follows.

The agents which can be used in the smoking composition of the present invention include various agents such as insecticides and fungicides, and mixtures thereof, depending on the purpose.

Examples of the above insecticides include permethrin, allethrin, resmethrin, cyphenothrin,
Pyrethroids such as pralesulin and phenothrin,
Organophosphorus drugs such as fenitrothion, dichlorvos (DDVP), diazinon, prothiophos and vitex, and carbamate drugs such as propoxur and methoxadiazone can be used.

Examples of the above bactericides include bactericides for agricultural chemicals such as isophthalonitrile, procymidone, biletone, and molestan; A bactericide or the like can be used.

The content of the drug in the present invention is preferably 2% by weight or more and 20% by weight or less based on the total weight of the smoke composition. Further, the drug is not limited to one kind, and two or more kinds can be contained.

Furthermore, inorganic minerals such as clay, kaolin, talc, diatomaceous earth and the like can be added as extenders to the smoke composition of the present invention.

As a method for molding the smoking agent composition of the present invention, for example, it can be molded as follows.

The components of the composition are weighed, mixed well by a kneader or the like, and kneaded by adding an appropriate amount of water. The kneaded material is granulated by using a die having an opening of a certain area and using a pre-extrusion or a horizontal extrusion granulator. Further, the granulated material is cut into a predetermined size using a cutter or the like and dried. At this time, the granulated product is passed through a sieve before drying or after drying so as to have a certain particle size, and is sized.

At this time, for example, the granulated product is
By preparing granules such that the weight ratio of the smoker granules having a size of 700 μm to 3350 μm is 60% or more, preferably 80% or more, and the apparent specific gravity becomes 0.6 to 0.8 g / ml, It is possible to obtain a smoking agent composition which is excellent in the rate of volatilization into the air and reachability to the gap, and which has been adjusted to an appropriate smoking rate so that the user is not likely to smoke.

In order to obtain a molded product having such a particle size and an apparent specific gravity, it is possible to appropriately adjust the above-described kneading, granulating, cutting conditions with a cutter or the like.

That is, the apparent specific gravity of the granulated product can be adjusted by appropriately combining the particle size of the granulated product, the rheology of the kneaded product, and the pressurized state during granulation. Further, the rheology of the kneaded product can be appropriately adjusted by the blending components, the amount of added water, the kneading time, the kneader performance and the like. The pressurized state at the time of granulation is affected by the porosity of the die and the thickness of the die, in addition to the performance of the granulator.

Further, the granulated product is sized, for example, the granulated product is passed through a 3350 μm sieve to be 1700 μm
It is also possible to adjust the ratio of the weight remaining on the sieve to be 60% or more.

The igniter used for the smoking agent composition of the present invention may be any igniting device that generates heat enough to heat a part of the smoking agent composition to start smoking. It may be something.

The smoking agent composition of the present invention comprises a binder such as carboxymethylcellulose, hydroxypropylmethylcellulose, polyvinyl alcohol, starch, etc .; an efficacy enhancer such as piperonyl butoxide, S-421;
Antioxidants such as HT and tocopherol, and additives such as fragrances can be appropriately compounded.

[0029]

The present invention will be described below in more detail with reference to examples, but the present invention is not limited to these examples.

Embodiment 1 Manufacturing method of smoke agent granules 60% by weight azodicarbonamide (hereinafter referred to as AZ)
4% by weight of nitrocellulose (hereinafter, referred to as NC), 1% by weight of zinc oxide, 5% by weight of hydroxypropylmethylcellulose (hereinafter, referred to as HPMC), 25% by weight of talc, and 5% by weight of phenothrin as an active ingredient were weighed out, and were kneaded. After sufficient mixing and stirring, water was added and the mixture was kneaded, and the mixture was granulated using a pre-extrusion granulator with a die having an opening having a diameter of 2 mm. Further, the granulated product was cut into a predetermined size by a cutter and dried to obtain the smoke-agent granules of Example 1.

Embodiment 2 FIG . Preparation of smoke granules AZ 50% by weight, NC 4% by weight, zinc oxide 3% by weight, H
5% by weight of PMC, 33% by weight of talc and 5% by weight of methoxadiazone as an active ingredient were weighed, mixed and kneaded sufficiently with a kneader, kneaded with water, and extruded into a die having an opening of 2 mm in diameter. Granulation was performed using a granulator. Further, the granulated product was cut into a predetermined size by a cutter and dried to obtain the smoke agent granules of Example 2.

Comparative Example 1 Preparation method of smoke agent granules AZ 60% by weight, NC 4% by weight, HPMC 5% by weight, talc 26% by weight and phenothrin 5% by weight as an active ingredient were weighed, respectively, and the same as in Example 1,
The smoke granules of Comparative Example 1 were obtained.

Comparative Example 2 Preparation Method of Smoke Granules 50% by weight of AZ, 4% by weight of NC, 5% by weight of HPMC, 36% by weight of talc, and 5% by weight of methoxadiazone as an active ingredient were weighed, and the smoke of Comparative Example 2 was obtained in the same manner as in Example 2. Smoke granules were obtained.

Test Example 1 Smoke state of smoke agent granules 25 g of smoke agent composition of Examples 1 and 2 and Comparative Examples 1 and 2
Was filled in a metal container, and smoking was started using an igniter whose exothermic agent was composed of silicon iron and a metal oxide. The smoke test was 6
It was visually observed whether or not smoking was continuously and quickly performed inside the tatami mat. A good result was obtained when the smoking was performed continuously and quickly, and a bad result was obtained when the smoking was slow.

The volatilization rate of the active ingredient was determined as follows. The sample is smoked in a room having an inner volume of 6380 L, and the room air is stirred by a fan. Then, about 20 L of room air is passed through a glass tube filled with silica gel for chromatography using a vacuum pump, and the active ingredient is adsorbed on the silica gel. . Next, the active ingredient is eluted and recovered with acetone, quantified by gas chromatography, and the amount (A) of the collected active ingredient in the indoor air is determined. On the other hand, the total amount (B) of the active ingredient in the sample is determined by gas chromatography. From these values, the volatilization rate is calculated by the following equation 1.

[0036]

(Equation 1)

The results are shown in Table 1.

[0038]

[Table 1]

Embodiment 3 FIG . Manufacturing method of smoke agent granules AZ 55% by weight, NC 4% by weight, zinc oxide 1% by weight, H
5% by weight of PMC, 30% by weight of talc, and 5% by weight of phenothrin as an active ingredient were each weighed out, thoroughly mixed and kneaded by a kneader, kneaded by adding water, and kneaded.
Granulation was performed using a pre-extrusion granulator of a die having an opening of mm. Further, the granulated product was cut into a predetermined size by a cutter and dried to obtain the smoke agent granules of Example 3.

Comparative Example 3 Preparation Method of Smoke Granules 65% by weight of AZ, 6% by weight of zinc oxide, 5% by weight of HPMC, 19% by weight of talc and 5% by weight of phenothrin as an active ingredient were weighed, respectively. To obtain smoke granules.

Comparative Example 4 Formulation of smoker granules NC 30% by weight, HPMC 5% by weight, Talc 60% by weight
In addition, 5% by weight of phenothrin as an active ingredient was weighed out, and in the same manner as in Example 3, smoking granules of Comparative Example 4 were obtained.

Comparative Example 5 Preparation Method of Smoke Granules 60% by weight of AZ, 5% by weight of zinc oxide, 5% by weight of HPMC, 25% by weight of talc, and 5% by weight of phenothrin as an active ingredient were weighed, and the same procedure as in Example 3 was carried out. To obtain smoke granules.

Test Example 2 Indoor Contamination of Smoke Agent Granules 25 g of the smoke agent compositions of Example 3 and Comparative Examples 3, 4, and 5 were filled in a metal container, and the exothermic agent was ignited using an igniter comprising silicon iron and metal oxide. Smoke started. In the smoke test, the interior of the 6 tatami mat was sealed and smoked. After 2 hours, the room was ventilated and the flooring and floor condition were visually observed. The case where it was not performed was regarded as minor. Table 2 shows the results.

[0044]

[Table 2]

Test Example 3 Effect of AZ Decomposition Accelerator Thermal analysis (DTA) was performed on a mixture of 90% by weight of AZ and 10% by weight of a decomposition accelerator shown in Table 3 in a mortar,
The decomposition temperature was measured. Further, as an evaluation of the accelerated decomposition state, 10 g of a sample was placed on aluminum foil and smoking was started.
It was visually observed whether or not smoking was continuously and quickly performed, and the case where continuous and rapid smoking was performed was evaluated as good, and the case where smoke was slowly performed was evaluated as poor. As a result, the decomposition temperature of AZ was the same as that of the non-added group when any of the decomposition accelerators was added. Table 3 shows the smoking status of each test plot.
Shown in

[0046]

[Table 3]

Test Example 4 Size and apparent size of smoke granules
Specific gravity and smoking time 60% by weight of AZ, 3% by weight of NC, 3% by weight of zinc oxide, 5% by weight of carboxymethylcellulose, 22% by weight of clay
Then, 7% by weight of permethrin as an active ingredient was weighed out, mixed and stirred sufficiently by a kneader, kneaded by adding water, and granulated by using a pre-extrusion granulator of a die having an opening having a diameter of 2 mm. Further, the granulated product was cut into a predetermined size by a cutter and dried to obtain smoke agent granules of Examples 8 to 12 shown in Table 4. The particle size distribution was classified using sieves of 3350 and 1700 μm, and indicated by weight% based on the total amount. The apparent specific gravity is 10
The weight of granules that can be filled into a 0 mL container was measured and determined.

25 g of the smoke composition shown in Examples 8 to 12
Was filled in a metal container, and smoking was started using an igniter whose exothermic agent was composed of silicon iron and a metal oxide. The time from the start of smoking to the end was measured. Table 4 shows the results.

[0049]

[Table 4]

[0050]

EFFECTS OF THE INVENTION By using the smoking agent composition of the present invention, compared with the conventional one, the drug is excellent in diffusibility, the gas odor is reduced, and the production cost and production time are reduced. It is possible to provide a self-combustion continual smoking agent which is excellent in safety and improved in indoor pollution.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI A01N 47/34 A01N 43/82 101E 53/08 53/00 508A

Claims (4)

[Claims] 1. A smoke containing 1 to 20% by weight or less of a burning agent, 30 to 70% by weight of an azodicarbonamide and an azodicarbonamide decomposition accelerator based on the total weight of the composition. Composition. 2. The smoke composition according to claim 1, wherein the burning agent is nitrocellulose. 3. An azodicarbonamide decomposition accelerator,
2. The smoke-treating composition according to claim 1, which is one or more decomposition accelerators selected from the group consisting of zinc stearate, magnesium stearate, zinc carbonate and zinc oxide. 4. The method according to claim 1, wherein the weight percentage of the smoker granules having a particle size of 1700 μm to 3350 μm is 60% or more, and the apparent specific gravity is 0.6 to 0.8 g / ml. A smoker composition as described.