JPS61167603A - Extender compositon for insecticidal and fungicidal agent to be scattered on soil - Google Patents

Abstract

PURPOSE:To provide the title composition containing an alkali metal alginate, dibenzylidene sorbitol, etc., and anionic surfactant and a polar organic solvent as essential components, free from run out of the active component in sprinkling and rain, preventing the secondary pollution, and having improved durability. CONSTITUTION:The objective composition contains (A) 0.1-5pts.wt., preferably 0.2-3pts.wt. of an alkali metal alginate, (B) 0.5-10pts.wt., preferably 0.5-5pts. wt. of dibenzylidene sorbitol or its substituted derivative, (C) 0.5-30pts.wt., preferably 0.5-15pts.wt. of an anionic surfactant, and (D) 1-70pts.wt., preferably 2-50pts.wt. of a polar organic solvent (preferably dimethylformamide or N- methyl-2-pyrrolidone), as essential components.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a spreading agent composition for an insecticide and fungicide to be sprayed on soil.

More specifically, the present invention relates to a spreading agent composition for an insecticide and fungicide that binds the active ingredient of the insecticide and fungicide to soil particles so that the active ingredient does not run out even during watering or rain, thereby improving sustainability.

(Prior art) Conventionally, most fungicides or insecticides are commercially available in the form of emulsions or wettable powders. For example, sterilizing disinfectants for gardening, termite killers, etc. It is commercially available in the form of a wettable powder containing a few percent to several tens of percent of a surfactant and kerosene or xylene, and when spraying, it is diluted with water and applied in the form of an emulsion.

Bactericidal and insecticidal compounds include DDVP (dimethylnochlorovinylphos7ate), Marathon (dimethylnocarbethoxyethyldithiophos7ate), and chlordane (1,
2,4,5,6,7,8,8-octachlor-2,3,
There are many types such as phosphorus type and halogen type such as 3a, 4,7.7m-hexahydro-4,7-methanoindene),
1-10% of non-ionic surfactants such as sorbitan monooleate or polyoxyalkyl ethers
It is commercially available in the form of a wettable powder, usually with a composition of 5 to 6% kerosene or xylene, about 70% kerosene or xylene, and the balance active ingredient compound.

This water conservancy or concentrated emulsion is 10 to 20 times, sometimes 5 times
The usual method of use is to dilute it to 0 times or more, stir it to make a milky lotion, and spray it on the soil with a sprayer. Termite killers and fungicidal insecticides for gardening, etc., which are commercially available in the form of wettable powders or concentrated emulsions, are excellent in that they only need to be diluted with water before application, and do not use dangerous flammable solvents. There is. However, on the other hand, if water is sprinkled or it rains after application, the active ingredient compound is easily washed away, for example, as a milky liquid, and the effect does not last. There is also a great risk of secondary pollution caused by leakage.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned problems that occur when spraying soil with sterilizing and insecticides, improves the sustainability of the sterilizing and insecticidal effects after application, and reduces the risk of secondary pollution. The purpose of this invention is to provide a composition that eliminates the above problems.

゛(Means and effects for solving the problem) The present invention is a germicidal insecticide to be sprayed on soil, which contains an alginate alkali salt, dibenzylidene sorbitol or its nuclear substituted derivative, an anionic surfactant, and a polar organic solvent as essential components. This is a spreading agent composition for pharmaceuticals.

Preferred alginic acid alkaline salts are sodium, potassium, ammonium, and triethanolamine salts, and the most preferred is sodium salt. This is because sodium alginate is light in color and cheaper than other salts.

When an alkali salt of alginic acid is sprayed on soil, it causes a substitution reaction with Ca ions, M, ions, etc. in the soil, and becomes Ca alginate, Mg alginate, etc., and has the effect of producing a weak gel state.

Dibenzylidene sorbitol is generally produced by dehydration condensation of 2 moles of benzaldehyde and 1 mole of D-Sorbitol in the presence of an acid catalyst, and is in the form of a white powder. Nuclear-substituted derivatives of dibenzylidene sorbitol with an alkyl group or a halogen group can also be obtained in the same manner as above using a nuclear-substituted derivative of benzaldehyde. For example, di(p-methyl)pencylidene sorbitol, di(p
-chlor) benzlidene sorbitol, etc. These nuclear substituted derivatives can also be applied to the composition of the present invention in the same way as dibenzylidene sorbitol. Nuclear substituents of the 8-nuclear substituted derivatives include alkyl groups such as methyl group and ethyl group; methoxy group and ethoxy group. Alkoxy groups such as; halogen atoms such as chlorine are used. Dibenzylidene sorbitol and its nuclear-substituted derivatives, due to their inherent aggregation action, combine the active ingredient compound in the emulsified bactericidal insecticide with alginate alkali salt and Ca in the soil.
It binds to a gel generated by ions and forms a water-insoluble film around it.

The types of 7-ionic surfactants that are commonly used as anionic surfactants are limited, such as fatty acid soaps, alkyl succinates, alkyl sulfonates, aromatic sulfonates, and aliphatic sulfonates. It's not a thing.

The anionic surfactant has the effect of emulsifying dibenzylidene sorbitol or its nuclear substituted derivative in the spreading agent composition.

As the polar organic solvent, aprotic polar solvents such as trimethylformamide, N-methyl-2-pyrrolidone, and trimethylsulfoxide are used. Among them, dimethylformamide and N-methyl-2-pyrrolidone are preferred because they remain liquid even when the temperature drops and are easy to handle. Polar organic solvents are used as solvents for dibenzylidene sorbitol or its nuclear substituted derivatives.

Each component mentioned above is 0.5 to 10 parts by weight, preferably 0.5 to 10 parts by weight of dibenzylidene sorbitol or its nuclear substituted derivative.
5-5 parts by weight; anionic surfactant 0.5-30 parts by weight, preferably 0.5-15 parts by weight; polar organic solvent 1-7
It is contained in a ratio of 0 parts by weight, preferably 2 to 50 parts by weight, and 0.1 to 5 parts by weight, preferably 0.2 to 3 parts by weight of the alginate alkali salt. Since the alginate alkali salt is usually used in the form of an aqueous solution, the spreading agent composition of the present invention can be used in the above-mentioned 4.
It contains about 0.5 to 10 parts by weight of water per 1 part by weight of the ingredients.

Although the content ratio of each of the above components is not particularly limited, if the content of dibenzylidene sorbitol or its nuclear substituted derivative is too large, the entire composition tends to gel and become unstable. If the amount is too small, the above-mentioned binding effect to the gel will be reduced, resulting in poor water resistance. If the content of the anionic surfactant is insufficient, the components of the composition will be difficult to emulsify, and even if it is used in excess, the emulsification will not be particularly good. It may interact with surfactants in wettable powders and impair emulsion stability.

If the amount of the organic solvent is too small, undissolved dibenzylidene sorbitol or its nuclear substituted derivative will remain, resulting in insufficient effects; if the amount is too large, alginate alkali salts will precipitate and the emulsified state will tend to become unstable. Also, if the alginate alkali salt content is too low, the replacement reaction with Ca ions or Mg ions in the soil will be insufficient, and if it is too high, the emulsion will become a sterilizer, and the viscosity of the insecticide will become high, causing problems in the spraying of the chemical emulsion. There is a risk that the product will become defective.

The spreading agent composition of the present invention is generally commercially available, and when emulsified by diluting a concentrated emulsion with water or a wettable powder of a fungicidal insecticide,
Alternatively, the amount added after emulsification is generally 0.1 to 10%, preferably 0.2 to 5% (wt%).

The spreading agent composition of the present invention can be obtained by mixing each of the above-mentioned components in a predetermined ratio and does not require any special manufacturing method. The alginate alkali salt powder is mixed and dissolved in a surfactant to form a solution, while the alginate alkali salt powder is mixed and dissolved in water to form an aqueous solution.The above organic solvent solution of dibenzylidene sorbitol and alginate aqueous solution are mixed to form a final composition. 6:) When mixing an organic solvent solution of pennolidene sorbitol and an alginate aqueous solution, add a small amount, for example, 1) 0.5 to 2 parts by weight of triethanol per 100 parts by weight of the total amount of both solutions. Adding an amine facilitates uniform mixing of both liquids and shortens the time required for mixing. For example, 4.5 parts by weight of dibenzylidene sorbitol, 9.5 parts by weight of anionic surfactant and 9.5 parts by weight of dimethylformamide are mixed and
℃ or less, usually about 80° C., to completely dissolve dibenzylidene sorbitol, maintain the temperature for about 10 to 15 minutes, and then cool to room temperature. Separately, 3 parts by weight of sodium alginate powder was added to 97 parts by weight of water and dissolved with stirring to form a viscous aqueous solution.

The 7-ion surfactant of dibenzylidene sorbitol - dimethylforma N? 20 parts by weight of solution, 50 parts by weight of sodium alginate aqueous solution and 0 parts by weight of triethanolamine
．． 5 parts by weight were mixed and stirred until it became clear to obtain the spreading agent of the present invention.

(Example) The present invention will now be described in more detail with reference to Examples. In each example, % by weight indicates parts by weight and % by weight.

Example 1 (1) Solution 1 Dibenzylidene sorbitol powder (manufactured by Easy Chemical Industry Co., Ltd.) 5 parts 36% aqueous solution of sodium lauryl sulfonate (manufactured by Koyosha Co., Ltd.) 20 parts N-methyl-2-pyrrolidone (Mitsubishi Kasei Co., Ltd.) 75 parts (manufactured by Kogyo Co., Ltd.) The above components were mixed, heated to 80°C, held for 15 minutes, and then cooled to room temperature. This is called solution 1.

(2) Solution 2 Sodium alginate (reagent) 3 parts water
97 parts The above ingredients were mixed and dissolved by stirring at a temperature of 60°C to form a 3% aqueous solution. This is called solution 2.

(3) Mix the solutions of (1) and (2) above in the following ratio.

120 parts of solution 279 parts of solution 1 part of triethanolamine When the mixture is slowly stirred for 10 to 15 minutes, the mixture is uniformly mixed to form a clear solution. This is designated as Composition 1. Commercially available termite control agent Roldane hydrating agent (Versicol Chemical 1,2
．． 4.5,6,7゜8.8-octachlor-2,3,3
When 200 parts of water (20-fold dilution) is added to 10 parts of 4.7.7m-hexahydro-4,7-methanoindene (containing 40%), a white emulsion is immediately formed. This is the comparison amount. Add 2 parts of Composition 1 to this and stir well. This is the test product.

Next, prepare two 200ml beakers, fill both with half the amount of soil, and smooth the surface well. Sprinkle 20g each of the test product and comparative amount into each beaker, and after 5 minutes, add another 100ml of water. . The comparison sample immediately turned white and cloudy, but the test sample did not turn cloudy at all, nor did it generate the odor characteristic of chlordane. Next, in order to concretely confirm this effect, the elution amount was measured. That is, 10 minutes and 10 hours after adding 100 ml of water, a comparison amount of upper layer water (white and cloudy) and a test sample upper layer water (clear) were taken into two weighing bottles, one at a time. was evaporated in a hot air circulating dryer at 105° C. to remove moisture, and the amount of eluate containing chlordane remaining in the weighing bottle was measured. The results are shown in Table 1 below.

As shown in Table 1 above, it can be seen that the elution amount of the test product is extremely small and the active ingredient does not elute into the water.

Example 2 (1) Solution 2-1 Dibennolidene sorbitol powder 5 parts Upizol B50 (sodium dioctyl sulfosuccinate (manufactured by NOF Corporation) 25 parts Dimethylform 7mide (manufactured by Shin Nitto Chemical Co., Ltd.) 70 parts Mix the above components and dissolve in the same manner as in Example 1 to form a solution 2-1.
shall be.

(2) Solution 2-2 Ammonium alginate 2 parts water
98 parts The above-mentioned sounds were mixed and dissolved in the same manner as in Example 1 to obtain a solution 2-2. - (3) Next, mix each solution of (1) and (2) above in the following ratio.

Solution 2-1: 15 parts Solution 2-2: 85 flS The mixture was kept slowly stirring at a temperature of 40°C for about 30 minutes to form a completely clear reddish solution.

This is designated as Composition 2.

When 500 parts of water (50-fold dilution) is added to commercially available Marathon Permanent Agent (containing 50% dimethylnorbetquin thiophosate) 10H, a white emulsion is immediately formed. This is the comparison amount.

Add 3 parts of Composition 2 to the comparative product and stir well.

This is the test product.

The influence of watering after soil application was investigated for each of the comparison amount and test product in exactly the same manner as in Example 1. A comparative amount of the water spray became cloudy, but the test product remained transparent.

Next, the elution amount was measured in exactly the same manner as in Example 1. The results are shown in Table 2 below.

From the results shown in Table 2 above, it can be seen that the test product had extremely little elution compared to the comparative amount, and its effect was excellent.

Example 3 (1) Solution 3-1 No(P-methyl)benzylidene sorbitol powder (manufactured by Shin Nippon Chemical Co., Ltd.) 3 parts Diapon PC (
Sodium oleoyl methyl taurate) 35% manufactured by Nippon Oil & Fats Co., Ltd.
20 parts Dimethylformamide 77 parts The above components were mixed and dissolved in the same manner as in Example 1 to form a solution.

(2) Solution 3-2 Sodium alginate 3 parts water
97 parts The above components were mixed and dissolved in the same manner as in Example 1 to obtain Solution 3-2.

(3) Mix the solutions of (1) and (2) above in the following proportions.

Solution 3-1: 20 parts Solution 3-2: 80 parts When the mixture is slowly stirred at a temperature of 40 DEG C. for about 25 to 30 minutes, it becomes a completely clear colorless liquid. This is designated as Composition 3. 10 parts of commercially available DDVP water solution (containing 25% dimethyldichlorovinyl 7-mole-7-ate) and 200 parts of water.
(diluted 20 times) to make an emulsion, which is used as a comparative product.

Add 5 parts of Composition 3 to the comparison product, stir well, and use this as a test product.

The influence of watering after soil application was investigated for each of the comparison product and the test product in exactly the same manner as in Example 1. The aqueous solution of the comparison product became cloudy, but that of the test product remained transparent. 6 The elution amount was also measured in the same manner as in Example 1. The results are shown in Table 3 below.

LU From the results in Table 3 above, it can be seen that the test product had an extremely small amount of elution and was highly effective.

(Effects of the Invention) As is clear from the above explanation, the spreader composition for fungicidal insecticides of the present invention can bind the active ingredients in the fungicidal insecticides well to soil particles, and can remain in the soil even during watering or rainfall. It has the excellent effect of minimizing the amount of water leakage. Therefore, it maintains its effectiveness as a bactericidal insecticide for a long time, and it also has the effect of preventing the occurrence of secondary pollution due to leakage of the active ingredient.

Claims (1)

[Scope of Claims] 1. An insecticide and fungicide spreader for spraying on soil, characterized by containing an alginate alkali salt, dibenzylidene sorbitol or its nuclear substituted derivative, an anionic surfactant, and a polar organic solvent as essential components. agent composition. 2. Alginate alkali salt 0.1-5 parts by weight, dibenzylidene sorbitol or its nuclear substituted derivative 0.5-10
The spreading agent composition for an insecticide and fungicide according to claim 1, which contains 0.5 to 30 parts by weight of an anionic surfactant and 1 to 70 parts by weight of a polar organic solvent.