JP3001169B2 - Fly incense stick - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fly incense stick containing empentrin as an active ingredient.

[0002]

2. Description of the Related Art Mosquito coils have been used for more than 100 years as an insecticide for controlling mosquitoes, and their active ingredients are due to their heat transpiration and thermal stability.
(±) -2-allyl-3-methyl-cyclopent-2-
En-1-one-4-yl (+)-cis, trans-
Chrysanthemato (hereinafter referred to as pinamin forte) is widely used. On the other hand, flies are less common in urban areas, but are more likely to be troubled around garbage dumps, livestock stalls, and poultry houses. Insects such as emulsions, oils and powders are used to control the source of flies.Furthermore, space aerosols are widely used in general households to control adults, but they have the disadvantage of being transient and of poor sustainability. is there. Therefore, development of a fly control agent which is a space treatment agent, has an effect lasting for several hours, has a good diffusibility, and is effective even in an open scene is desired.

[0003]

A mosquito coil is a very rational insecticidal form since a single match maintains spatial processing over time and its efficacy is constant until it is burned out. Is 200 to 250 ° C, several mm away from the combustion part
Volatilizes from nearby parts. It is known that the volatilization rate of the active ingredient reaches 70 to 80% without adding a stabilizer in the conventional pinamin forte-containing incense, but the effect on fly is weak, and application to the fly incense is difficult. It was difficult.
By the way, empentrin is
The insecticidal compound described in Japanese Patent Application Publication No. JP-A-2003-133873 has a high insecticidal effect on various pests and has a normal-temperature volatilization property, and thus has been put to practical use particularly in the field of controlling insect pests on clothing. The present inventors have focused on the efficacy and volatility of empentrin against flies, and have started the development of fly incense sticks. Faced the problem. this is,
It is considered that empentrin is inferior in thermal stability to pinamine forte and is caused by decomposition of the drug by heating, polymerization and the like. Therefore, improvement of thermal stability has been an important issue for empentrin fly incense sticks.

[0004]

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention comprises empentrin as an active ingredient in an amount of 0.1 to 0.1%.
One or two or more di-tert-butyl-phenol-based stabilizers containing 3 to 2.0% by weight and having a boiling point of 250 ° C. or more are used in an amount of 0.05 to 2.
The present invention relates to a fly incense stick, which is blended in an amount of 0 times.

That is, when various stabilizers were studied to improve the thermal stability of the empentrin fly incense stick, one of di-tertiary butyl-phenol-based stabilizers having a boiling point of 250 ° C. or higher or By blending two or more types in an amount of 0.05 to 2.0 times with respect to empentrin,
The inventors have found that not only the stability over time but also the stability during smoking can be significantly enhanced, and the volatilization rate can be increased to 70 to 80%, thus completing the present invention.

[0006]

[Effect] Empentrin used as an active ingredient in the fly incense stick of the present invention has a higher insecticidal activity against flies than pinamine forte, and 0.3 to 10% is contained in the fly incense stick.
2.0% by weight is sufficient. It should be noted that even if a conventional pyrethroid such as pinamine, pinamine forte, bioarrestrin, esviol, ethoc, or the like is mixed with the mixture, there is no problem. The fly incense stick of the present invention is characterized in that a di-tert-butyl-phenol-based stabilizer having a boiling point of 250 ° C. or more is blended as a stabilizer. For example, mono-tert-butyl-phenol-based stabilizers such as 3-tert-butyl-4-hydroxyanisole and 2-tert-butyl-4-hydroxyanisole have no effect, and N, N'-diphenyl- Amine-based stabilizers such as P-phenylenediamine and phenyl-β-naphthylamine were also less effective. In addition, the reason why those having a boiling point of 250 ° C. or more is effective is that the stabilizer itself does not volatilize at this temperature because pyrethroid of the active ingredient volatilizes from around 200 to 250 ° C.

[0007] Examples of the stabilizer used in the present invention include, but are not limited to, the following.

(1) 2,6-di-tert-butyl-4-methylphenol (BHT)

[Stabilizer A] (2) 2,2'-methylenebis (4-methyl-6-tert-butylphenol)

[Stabilizer B] (3) 2,2'-methylenebis (4-ethyl-6-tert-butylphenol)

[Stabilizer C] (4) 4,4'-butylidenebis (3-
Methyl-6-tert-butylphenol)

[Stabilizer D] (5) 4,4'-thiobis (3-methyl-6-tert-butylphenol)

[Stabilizer E] (6) 2-tert-butyl-6-
(3-tert-butyl-2-hydroxy-5-methylbenzyl) -4-methylphenyl acrylate

[Stabilizer F] (7) 2,4-di-tert-butylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate

[Stabilizer G]

In the present invention, one or two of the above stabilizers are used.
More than one kind is blended in an amount of 0.05 to 2.0 times the amount of empentrin, but of course, various conventional stabilizers such as phosphite-based, amine-based, and organic sulfur-based compounds may be mixed. .

[0010] The fly incense stick of the present invention may be added to the above-mentioned active ingredient composition, if necessary, with piperonyl butoxide, MGK-
264, MGK-5026, S-421, Reisen 38
A synergist such as 4 may be added. In addition, pyrethrum extract lees flour, flame retardants such as wood flour, soybean flour, dextrin, starch,
Sizing agents such as gum arabic and CMC, malachite green as a coloring agent, dehydroacetic acid as a fungicide and 2,4
Fly fly incense can be obtained in a conventional manner by appropriately adding dinitrophenol, other fine mineral powder, polyethylene glycol and the like.

According to the present invention, empentrin is used as an active ingredient, and the effect of a stabilizer is higher than that of conventional pinamin forte incense sticks. It provides incense.

Next, the present invention will be described in more detail with reference to Test Examples and Examples, but the present invention is not limited only to these without departing from the gist thereof.

[0013]

[Test Examples] Fly incense sticks were prepared according to the formulation shown in the following table, and the stability over time (preserved at 40 ° C. for 6 months), the volatilization rate of the active ingredient during smoking, and the insecticidal efficacy against flies were examined. In addition, about the other components, in addition to the components described, 20% by weight of starch, 0.2% by weight of sodium dehydroacetate, 15% by weight of fleas extracted from pyrethrum, and wood flour were added to make the total amount 100% by weight. The stability over time was evaluated according to the following criteria, and the insecticidal efficacy was indicated by relative efficacy with the incense stick of 0.8% by weight pinamine forte taken as 1.0. ；: Recovery rate of active ingredient after storage at 40 ° C. for 6 months is 95% or more △; ９０ 90 to 95% ×; 〃 90% or less

[0014]

[Table 1]

[0015] As a result of the test, the empertrin fly incense stick was added with a di-tertiary butyl-phenol-based stabilizer in an amount of 0.05 times or more of empentrin to provide stability over time and effective smoking. It was recognized that the volatilization rate of the component was improved, and the insecticidal effect was higher than that of the pinamine forte incense stick (control incense stick 6). On the other hand, as a stabilizer, a compound containing a mono-tertiary butyl-phenolic compound as in Control Incense 2 or a compound containing an amine compound as Control Incense 3, particularly the volatilization rate during smoking. No improvement was observed and it was unsuitable. Further, as shown in the control incense sticks 4 and 5, the compounding amount of the stabilizer used in the present invention is insufficient when the amount is 0.05 times or less of empentrin.
On the other hand, it became clear that the effect leveled off even if the amount exceeded 2.0 times. In the case of pinamine forte incense, there is almost no effect of compounding a stabilizer, while the empentrin fly incense stick of the present invention realizes a high insecticidal activity incense by adding a specific stabilizer, and its practicality Is extremely high.

[0016]

Example 1 0.8 parts of empentrin and stabilizer A (2,
6-di-tert-butyl-4-methylphenol)
0.15 part was uniformly mixed with 99.05 parts of a base material for incense such as pyrethrum extract meal powder, wood flour, starch and the like, and a fly incense stick was obtained by a known method. When one volume (13 g) was used in a room of 6 tatami mats and the volatilization rate of the active ingredient was measured, it was 75%.
The flies and mosquitoes were completely controlled over a period of 7 and a half hours of smoking.

[0017]

Example 2 0.6 parts of empentrin, 0.15 parts of pinamine forte and stabilizer D [4,4'-butylidenebis (3-methyl-6-tert-butylphenol)]
Using 0.3 parts, a fly incense stick was obtained according to Example 1.
He placed the fly incense stick in the hanging incense dish, lowered it to his waist, and worked in a barn where a large number of flies had formed, but he did not bother him for about 6 hours.

[0018]

The present invention provides an empentrin fly incense stick which is excellent in stability over time, volatilization rate during smoking, and insecticidal effect by blending a specific stabilizer.

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Claims (1)

(57) [Claims] (1) Empentrin is added as an active ingredient in an amount of 0.3.
One or two or more di-tert-butyl-phenol-based stabilizers having a boiling point of 250 ° C. or more and 0.05 to 2.0% by weight based on empentrin.
A fly incense stick characterized by being blended in twice the amount.