JPS63119403A - Stabilized agricultural chemical wettable powder - Google Patents

Abstract

PURPOSE:To obtain the titled agricultural chemical wettable powder capable of remarkably suppressing gases evolved during storage for a long period, by adding a specific stabilizer to stabilize wettable powder containing captan as an active ingredient. CONSTITUTION:A stabilized agricultural chemical wettable powder obtained by adding one or two or more compounds selected from MgO, Mg(OH)2, MgCl2, CaO, Ca(OH)2 or ZnO as a stabilizer to wettable powder containing captan [=N-trichloromethylthiotetrahydrophthalimide] useful as a germicide as an active ingredient. The content of the above-mentioned stabilizer is preferably at least >=0.1pts.wt. based on 100pts.wt. active ingredient.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention contains N-)lichloromethylthiotetrahydrophthalimide (hereinafter, this compound will be abbreviated as cabtan), which is useful as a disinfectant, as an active ingredient. This invention relates to an agrochemical hydrating agent that significantly suppresses and stabilizes the gas generated during storage of a cabtan hydrating agent by adding and containing specific additives to the hydrating agent. .

[Conventional technology and problems]

Conventionally, there are relatively few technologies for suppressing gas generation in pesticide hydrating agents, but examples include Japanese Patent Application Laid-Open No. 53-91137 and Japanese Journal of Pesticide Science, Vol. 8, No. 2, pp. 119-204 (1983). It will be done.

JP-A-53-91137 discloses S-normal-butyl S'-paratertiary butylhensyl N-3-
Biridyldithiocarboimidate [hereinafter simply abbreviated as Denmart (registered trademark name of Denmart). ] and cabtan, add a hydrogen chloride scavenger (e.g. lead salt, calcium salt, barium salt, organotin compound, stearate, etc.) and a desiccant (e.g. calcium chloride, calcium oxide, silica gel, etc.) Disclosed is a method of stabilizing Denmato.

Journal of the Japanese Society of Pesticides, Vol. 8, No. 2, pp. 119-204 (198
3) describes the mechanism of the invention of the above publication. In other words, hydrochloric acid produced by the decomposition of cabtan,
Denmart (-ship name: buthiobate) is decomposed and MgO, Mg(011) z , CaO1Ca is used to prevent this decomposition.
It is stated that the addition of (Off) z was effective.

However, the above-mentioned known documents do not fully disclose that the Kabukun hydrating agent itself generates gas during storage and how to solve the problem.

Kyabukun hydrating agent is a common conventional hydrating agent consisting of drug substance, surfactant and mineral carrier.

However, during storage, gas is generated in the aluminum bag containing the cough hydrant, causing the volume of the bag to expand and cause the following problems.

■Significantly impairs the appearance and reduces product value.

■Due to the expansion of the aluminum bag (small packaging), the cardboard box containing the bag may become deformed, creating the risk of the package becoming damaged.

■There is a risk that the seal on the aluminum bag may break and the contents may leak.

[Means for solving problems]

The present inventors have investigated the prevention of gas generated during storage of Kyabukun hydrating agent by using the following additives:
As a result of various studies, it was discovered that by adding and containing a specific compound, gas generated can be significantly suppressed over a long period of time, thereby stabilizing the hydrating powder, and the present invention has been completed.

That is, the present invention provides a hydrating agent containing cabtan as an active ingredient, in which a compound selected from magnesium oxide, magnesium hydroxide, magnesium chloride, calcium oxide, calcium hydroxide, or zinc oxide is added to the hydrating agent as an additive. This invention relates to a stabilized agrochemical hydrating agent characterized by containing one or more of the following.

In the present invention, the content of the above-mentioned additives is not particularly limited, but is preferably at least 0.1 parts by weight based on 100 parts by weight of the active ingredient.

When the gas emitted from the above-mentioned Kyabukun hydrating agent was examined using a gas detection tube, no hydrochloric acid gas or chlorine gas was detected.

In addition, when a 30-day abuse test at 50°C was conducted on a cabtan hydrating agent that generates gas during long-term storage, no decomposition of the cabtan itself was observed.

On the other hand, when various surfactants or mineral carriers were added to the cabtan raw material and the above abuse test was conducted, gas generation was greatest when the surfactant was added. From these results, it is assumed that the main cause of gas generation is the reaction between the impurities in the carbantane raw material and the surfactant, but the mechanism is unknown.

Next, tests were conducted to suppress gas generation using various additives. This example will be specifically described.

[Margin below]

A abuse test (equivalent to long-term storage at room temperature) was conducted by adding various additives to the next-generation Kyabukun hydrating agent.

The composition of Kyabukun hydrating agent is as follows.

Note that the following parts represent parts by weight.

All of the above ingredients were mixed and pulverized using a hammer mill and subjected to an abuse test.

The above-mentioned Carplex #80 is a trade name of Shionogi & Co., Ltd. and its component is white carbon, and Tsurupol 5039 is a trade name of Toho Chemical Industry Co., Ltd. and its component is an anionic surfactant.

30g of the above composition, length: 160mm, width: 110mm
sealed in an aluminum bag (laminated with polyethylene and polyester, manufactured by Nihon Matai Co., Ltd.), and
The bag was kept at 0° C. for 30 days (abuse test), the internal bag volume before and after the abuse was measured, and the expanded volume was calculated from the difference.

The expansion volume inside the bag was measured by filling a measuring cylinder with 800 ml of water, submerging the aluminum bag containing the above composition in water, and reading the total volume from the rising water surface. The results are shown in Table 1.

Below C, blank space] Table 1 Additives of the present invention Expansion volume ml Additives of comparative examples Expansion volume ml No additives
In Table 1 of 82, there was no practical problem if the amount of gas generated was less than half of the amount without additives, that is, the expansion volume ml was less than half the amount.

The effect of expansion volume was investigated by varying the amount of magnesium oxide added as an additive.

The composition and ingredients of the cabtan permanent agent are the same as in Example 1. The results are shown in Table 2.

Table 2 The percentage by weight in Table 2 is the amount of magnesium oxide added to 100 parts by weight of the carbantane raw material, and the expanded volume was measured in the same manner as in Example 1.

Claims (2)

[Claims] (1) In a hydrating agent containing N-trichloromethylthiotetrahydrophthalimide as an active ingredient, an additive selected from magnesium oxide, magnesium hydroxide, magnesium chloride, calcium oxide, calcium hydroxide, or zinc oxide is added to the hydrating agent. 1. A stabilized agrochemical hydrating agent, characterized in that it contains one or more kinds of compounds. (2) The agrochemical wettable powder according to claim 1, wherein the content of the additive is at least 0.1 part by weight or more based on 100 parts by weight of the active ingredient.