JP4741260B2 - Nonaqueous pesticide spreading composition - Google Patents

Description

  The present invention relates to a spreading agent composition that imparts wettability to an application target of agricultural chemicals such as crops and pests by adding the agricultural chemical to water when the agricultural chemical is diluted and sprayed.

  Usually, when diluting and spraying emulsions, wettable powders, flowable powders, granular wettable powders, etc. that are agricultural chemical formulations with water, the agricultural chemicals are efficiently attached to surfaces that are easy to repel water, such as the surface of plants and pests. It is common to apply a spreading agent composition.

The spreader composition is generally composed of a surfactant as a main component and other additives added and dissolved in water. In order to provide stability during storage, a lower composition such as isopropyl alcohol is used. Alcohols are included. However, since such lower alcohols are flammable, there is a problem in safety during use and storage.
In addition, when preparing a spray solution for agricultural chemicals, if foaming is severe, there is a problem that foam overflows from the tank of the spray solution. Although the spreading agent composition is commercially available, the spreading agent composition itself has a low foaming property, but the effect of actively eliminating the foam caused by the agrochemical formulation is small. The foam effect was not always sufficient.

  Until now, as a spreading agent composition for agricultural chemicals, a non-aqueous composition obtained by dissolving sorbitan fatty acid ester, polyoxyethylene alkyl ether and polyether-modified silicone in isopropyl alcohol has been proposed (see Patent Document 1). . However, this is a composition that does not contain water and does not substantially contain water, and the improvement in wettability required as a spreader composition and the defoaming effect due to the polyether-modified silicone are recognized. However, it contained 50% by mass of alcohol having a low flash point with respect to the total amount of the composition, and was inevitably restricted in handling because it corresponds to a dangerous substance causing fire and the like. Further, in order to obtain the desired defoaming effect, the dilution ratio at the time of use was about 2000 times, and it was necessary to make the dilution ratio low so that the concentration of the spreader composition at the time of use was high.

  Further, a spreading agent composition (see Patent Document 2) comprising a fatty acid polyoxyalkylene alkyl ether, a solvent having a relatively high flash point, such as 2-butoxyethanol, and water, has also been proposed. Although the spreader composition has high safety, it has no defoaming effect, and in order to exhibit the effect as a spreader composition, the dilution ratio at the time of use is about 400 times and the low dilution. It was necessary to use at a relatively high concentration. The spreading agent composition has no particular limitation on the effective dilution ratio, but it is used as a spreading agent composition at a low concentration for distribution and storage, and also to reduce the environmental load. In other words, it is desirable that the desired effect can be obtained even when the dilution is high.

JP 2000-1404 (Claims and others) JP-A-6-60161 (Claims and others)

  The most important effect required for the spreader composition is to make the sprayed solution to which it is applied easily adhere to the surface of plants and pests, that is, to improve wettability. If there is an effect of suppressing the foaming of the liquid, it is advantageous because it becomes easier to use. Furthermore, in order to reduce the burden on human livestock and the environment, those used at low concentrations are desirable, and of course, it is necessary that the flash point is high and the safety is excellent.

  The inventors have the effect of improving the wettability of the spray liquid, that is, reducing the surface tension and the contact angle of the spray liquid, and further suppressing the generation of foam of the spray liquid. In addition, as a result of earnest research on a spreader composition that can exhibit these effects even at a high dilution that results in a low concentration compared to conventional spreader compositions, organic compounds with a high flash point Surfactant and antifoam in the spreader composition are prepared by dissolving the surfactant and antifoaming agent or foam breaker as main components in a solvent and making it non-aqueous substantially free of water. Since both the concentration of the agent or foam breaker can be increased, the inventors have found that the desired effect can be expressed even when diluted to a lower concentration than the conventional spreader composition, and that the effect can be maintained even after long-term storage, The present invention has been made based on this finding.

That is, the present invention is as follows.
(1) Average of block addition of ethylene oxide and propylene oxide to higher alcohol having 8 to 14 carbon atoms so that ethylene oxide is 20 to 80% by mass of the total addition molecular weight of ethylene oxide and propylene oxide in this order A total of 20 to 60% by mass of a nonionic surfactant having a molecular weight of 400 to 2000 and a surfactant that is a dialkylsulfosuccinate as an active ingredient, 20 to 70% by mass of a mixed solvent of dimethyl sulfoxide and propylene glycol, and A non-aqueous pesticide spreading agent composition comprising 1 to 20% by mass of one or more fatty acids having 12 or more carbon atoms.
(2) The spreading agent composition for non-aqueous agricultural chemicals according to (1), wherein the fatty acid having 12 or more carbon atoms is myristic acid, oleic acid or palmitic acid.
(3) The spreading agent composition for non-aqueous agricultural chemicals according to (1) or (2) above, containing 4% by mass or more of a fatty acid having 12 or more carbon atoms.
(4) The nonaqueous agrochemical spreader composition according to any one of (1) to (3), wherein the moisture content in the nonaqueous agrochemical spreader composition is 2.5% by mass or less.

The spreading agent composition for non-aqueous pesticides of the present invention contains a water-soluble organic solvent having a flash point of 70 ° C. or higher, that is, a safety of a hazardous material class 4 petroleum 3 or more related to the Fire Service Act.
The solvent used in the non-aqueous pesticide spreading agent composition of the present invention is not particularly limited as long as it has a flash point of 70 ° C. or higher and is water-soluble and compatible with water at an arbitrary ratio. , Glycols such as ethylene glycol and propylene glycol, ketones such as dimethyl sulfoxide and γ-butyrolactone, glycol ethers, acetamides, formamides, and nitrogen-containing organic solvents such as pyrrolidones, A mixed solvent of propylene glycol and N-methyl-2-pyrrolidone or dimethyl sulfoxide is desirable, and a mixed solvent of propylene glycol and dimethyl sulfoxide is particularly desirable. These water-soluble organic solvents are used alone or in combination of two or more. These water-soluble organic solvents are preferably used in an amount of 10 to 90 parts by mass, particularly 20 to 70 parts by mass with respect to 100 parts by mass of the nonaqueous agrochemical spreader composition of the present invention.

  The surfactant used in the non-aqueous pesticide spreading agent composition of the present invention has an effect of improving the wettability of the spray liquid, and is optional with a water-soluble organic solvent having a flash point of 70 ° C. or higher. In particular, nonionic surfactants such as polyoxyethylene alkyl ether, polyoxyethylene sorbitan ester, polyoxyethylene fatty acid ester, alkylbenzene sulfonate, alkyl sulfosuccinate are not limited. And anionic surfactants such as nates, and cationic surfactants such as alkylamine salts and quaternary ammonium salts, preferably polyoxyethylene polyoxypropylene alkyl ethers having an average molecular weight of 400 to 2000, especially ethylene Oxide and propylene oxide in this order, ethylene oxide A block addition to a higher alcohol having 8 to 14 carbon atoms or a dialkylsulfosuccinate is used so that the total addition molecular weight of ethylene oxide and propylene oxide is 20 to 80% by mass. It is good to use. These surfactants may be used alone or in combination of two or more. These surfactants are preferably used in the range of 10 to 70 parts by mass, particularly 20 to 60 parts by mass with respect to 100 parts by mass of the nonaqueous agrochemical spreader composition of the present invention.

The antifoaming agent or defoaming agent used in the non-aqueous pesticide spreading agent composition of the present invention is particularly suitable as long as it has the effect of eliminating the foam of the spray solution of the agricultural chemical formulation or suppressing the generation of foam. Although not limited, for example, fatty acids, metal soaps, alcohols and glycols insoluble in water, silicones, modified silicones and the like can be mentioned, but fatty acids are preferred. The fatty acid is not particularly limited as long as it is soluble in the above-mentioned solvent, but preferably higher fatty acids having 12 or more carbon atoms, particularly myristic acid, oleic acid, and palmitic acid. These fatty acids are used alone or in combination of two or more. In particular, solid fatty acids are preferably used in combination with liquid fatty acids.
The antifoaming agent or antifoaming agent, particularly the fatty acid, is preferably used in the range of 1 to 20 parts by mass, especially 1 to 10 parts by mass with respect to 100 parts by mass of the nonaqueous agrochemical spreader composition of the present invention.

  The non-aqueous pesticide spreading agent composition of the present invention is substantially free of water and is preferably anhydrous, but water contained in the composition component itself and inevitable impurities during production and storage As for water mixed in, it is allowed. Although it is limited by the composition component, it is preferable that the water content in the non-aqueous pesticide spreading agent composition of the present invention is small, specifically 2.5% by mass or less. 5% by mass or less, and particularly preferably 0.75% by mass or less. By containing substantially no water, the antifoaming agent or antifoaming agent, in particular, the necessary amount of fatty acid is present in a state dissolved in the composition, and the foam of the spray liquid disappears even after long-term storage, Or it becomes possible to maintain the effect which suppresses the production | generation of a bubble.

The spreading agent composition for non-aqueous pesticides according to the present invention is obtained by adding a surfactant or spreading agent composition that imparts a wettability effect to the surface of plants and pests, which is the most important as the spreading agent composition. By dissolving an antifoaming agent or a defoaming agent having a high effect of eliminating the foam of the sprayed liquid or suppressing the generation of the foam, particularly fatty acids in an organic solvent having a high solubility in these, a surfactant and Even if a high concentration of antifoaming agent or antifoaming agent, especially fatty acid is added, there is no risk of separation or clouding, and further, water is excluded from the composition components, resulting in problems such as toxicity and low flash point. It is advantageous to use a highly safe and versatile organic solvent without using a special solvent having an excellent storability.
And, the non-aqueous pesticide spreader composition of the present invention has sufficient wettability even when diluted to a higher dilution so as to have a lower concentration compared to conventional spreader compositions. Further, since the disappearance of foam or the effect of inhibiting the generation can be expected, and the antifoaming agent or the foam breaker having a particularly high effect of disappearance of the foam or the inhibition of the formation, particularly fatty acids can be blended at a high rate, the effect is remarkably enhanced. Moreover, this effect is stably maintained over a long period of time by excluding water from the composition components.

Next, the best mode for carrying out the present invention will be described with reference to examples, but the present invention is not limited to these examples.
In addition, in the following Examples, a part represents a mass part.

  38 parts of polyoxyethylene polyoxypropylene alkyl ether (Peol AS-053X manufactured by Toho Chemical Co., Ltd.), 2 parts of dioctyl sulfosuccinate (Air Roll CT-1L manufactured by Toho Chemical Co., Ltd.), 20 parts of dimethyl sulfoxide and 36 parts of propylene glycol were mixed. Then, 2 parts of myristic acid and 2 parts of oleic acid were dissolved to obtain a spreading agent composition for agricultural chemicals. The water content measured by the Karl Fischer method (Hiranuma trace moisture measuring device AQ-7, Hiranuma automatic moisture vaporizer LE-24 V2.0) was 0.49% by mass.

  36 parts of polyoxyethylene polyoxyalkylene alkyl ether (Peol AS-053X manufactured by Toho Chemical Co., Ltd.), 4 parts of dioctyl sulfosuccinate (Air Roll CT-1L manufactured by Toho Chemical Co., Ltd.), 30 parts of dimethyl sulfoxide and 26 parts of propylene glycol are mixed. In addition, 2 parts of myristic acid and 2 parts of oleic acid were dissolved to obtain a spreading agent composition for agricultural chemicals of the present invention. The water content measured by the Karl Fischer method (Hiranuma trace moisture measuring device AQ-7, Hiranuma automatic moisture vaporizer LE-24 V2.0) was 0.52% by mass.

  36 parts of polyoxyethylene polyoxyalkylene alkyl ether (Peol AS-053X manufactured by Toho Chemical Co., Ltd.), 2 parts of dioctyl sulfosuccinate (Air Roll CT-1L manufactured by Toho Chemical Co., Ltd.), 40 parts of dimethyl sulfoxide and 14 parts of propylene glycol were mixed. Then, 4 parts of myristic acid and 4 parts of oleic acid were dissolved to obtain a spreading agent composition for agricultural chemicals. The water content measured by the Karl Fischer method (Hiranuma trace moisture measuring device AQ-7, Hiranuma automatic moisture vaporizer LE-24 V2.0) was 0.58% by mass.

Comparative Example 1
36 parts of polyoxyethylene polyoxyalkylene alkyl ether (Peol AS-053X manufactured by Toho Chemical Co., Ltd.), 2 parts of dioctyl sulfosuccinate (Air Roll CT-1L manufactured by Toho Chemical Co., Ltd.), 18 parts of dimethyl sulfoxide and 20 parts of propylene glycol are mixed. Then, 2 parts of myristic acid and 2 parts of oleic acid were dissolved. 20 parts of water was added here, but it became cloudy and oil droplets were observed on the water surface, and a uniform solution was not obtained.

Comparative Example 2
Dissolve 18 parts of polyoxyethylene polyoxyalkylene alkyl ether (Peol AS-053X manufactured by Toho Chemical Co., Ltd.) and 2 parts of dioctyl sulfosuccinate (Air Roll CT-1L manufactured by Toho Chemical Co., Ltd.) in a solvent mixed with 38 parts of diethylene glycol monobutyl ether. Further, 1 part of myristic acid and 1 part of oleic acid were dissolved. When 40 parts of water is added and mixed, a spreading agent composition for agricultural chemicals is obtained. However, this has a problem that it contains toxic butyl carbitol which is toxic.

Comparative Example 3
18 parts of polyoxyethylene polyoxyalkylene alkyl ether (pepol AS-053X manufactured by Toho Chemical Co., Ltd.) and 11 parts of dioctylsulfosuccinate (Airroll CT-1L manufactured by Toho Chemical Co., Ltd.) are dissolved in 34 parts of propylene glycol, and myristic acid is further added. 0.4 parts and 1.6 parts oleic acid were dissolved. 35 parts of water was added thereto and mixed to obtain a spreading agent composition for agricultural chemicals.

Comparative Example 4
38 parts of polyoxyethylene polyoxypropylene alkyl ether (PEPOL AS-053X manufactured by Toho Chemical Co., Ltd.), 2 parts of dioctylsulfosuccinate (Air Roll CT-1L manufactured by Toho Chemical Co., Ltd.), 20 parts of dimethyl sulfoxide, and 33.5 parts of propylene glycol And 2 parts of myristic acid and 2 parts of oleic acid were dissolved to obtain a spreading agent composition for agricultural chemicals of the present invention. The water content measured by the Karl Fischer method (Hiranuma trace moisture measuring device AQ-7, Hiranuma automatic moisture vaporizer LE-24 V2.0) was 2.9% by mass.

Test example 1 (surface tension and contact angle)
Examples 1-3 and Comparative Example 2 and Comparative Example 2 and Comparative Example 3 and two types of commercially available spreader compositions (commercially available spreader composition A: commercial products manufactured by Neoesterin Kumiai Chemical Industry Co., Ltd., commercial exhibition) Adhesive composition B: Kumiten (commercially available from Kumiai Chemical Industry Co., Ltd.) was diluted 5000 to 40000 times with distilled water to determine surface tension (dyne / cm) and contact angle (degree), the former being Wilhelmy (20 ° C.) The latter was measured by the droplet method. The results are shown in Table 1 and Table 2, respectively.

  The non-aqueous pesticide spreading agent composition of each example exhibited wettability equal to or higher than that of Comparative Examples 2 and 3 and the commercially available spreading agent composition even when diluted twice.

Test example 2 (storage stability)
Changes in appearance when the spreading compositions of Examples 1 to 3 and Comparative Examples 2 and 3 were stored at -5 ° C for 7 days, -20 ° C for 7 days, and 40 ° C for 120 days, and the above Similarly, the surface tension and contact angle were measured. As a result, all of them were frozen when stored at -20 ° C., but returned to their original state when thawed, and no change in appearance such as separation or precipitation of insoluble matter was observed. There was no change in appearance under other storage conditions. Further, the changes in the surface tension and the contact angle were not changed under any storage conditions as compared with those before the storage.

Test Example 3 (Foaming property and antifoaming property 1)
Examples 1 to 3 and Comparative Examples 2 to 4 and 1 type of commercially available spreader composition (commercially available spreader composition A: commercially available from Neoesterin Kumiai Chemical Industry Co., Ltd.) The ward was 10,000 times, and the comparative example 2 and the commercially available spreader composition were prepared by diluting 5000 times with industrial water. A cottage flowable (Kumiai Chemical Industry Co., Ltd. Insecticide aqueous suspension preparation) was added and mixed so as to be diluted 2000 times to prepare a spray solution of the cottage flowable containing the spreading agent composition. 500 ml of this diluted liquid was placed in a glass cylindrical container having a diameter of 12 cm and a height of 19 cm, and the circulating liquid dropped from a height of 40 cm from the liquid level and was circulated by a pump. Measure the height (cm) of the foam generated 2 minutes after the start of the pump operation, 10 minutes later (stop the pump after 10 minutes), and then the height of the foam (cm) 1 minute after stopping the pump. It was measured. In addition, the sprayed liquid after circulation was observed with the naked eye to confirm the presence of agglomeration, suspended matter, sediment, and the like.

Test Example 4 (Foaming property and antifoaming property 2)

  The foaming properties and antifoaming properties of the spreading compositions of Examples 1 to 3 and Comparative Example 4 after storage at 40 ° C. for 180 days were measured in the same manner as described above.

  From Test Examples 3 and 4, in each example, as in Comparative Examples 2 to 4, no agglomeration, suspended matter, sediment, etc. were observed, and the height of the foam was excellent up to 7 cm at best. On the other hand, it can be seen that the spreading agent compositions of Comparative Examples 2 to 4 already show foaming properties after 2 minutes from the start of the circulation operation in the pump, or show foaming properties after long-term storage.

Claims (4)

An average molecular weight of 400 to 400 in which ethylene oxide and propylene oxide are block-added to a higher alcohol having 8 to 14 carbon atoms so that ethylene oxide is 20 to 80% by mass of the total added molecular weight of ethylene oxide and propylene oxide in this order. A total of 20 to 60% by mass of a nonionic surfactant of 2000 and a surfactant that is a dialkylsulfosuccinate as an active ingredient , 20 to 70% by mass of a mixed solvent of dimethyl sulfoxide and propylene glycol , and one or A spreading agent composition for non-aqueous agricultural chemicals, containing 1 to 20% by mass of two or more fatty acids having 12 or more carbon atoms . The spreading agent composition for non-aqueous agricultural chemicals according to claim 1, wherein the fatty acid having 12 or more carbon atoms is myristic acid, oleic acid or palmitic acid. The spreading agent composition for non-aqueous agricultural chemicals according to claim 1 or 2, comprising 4 mass% or more of a fatty acid having 12 or more carbon atoms. The spreading agent composition for non-aqueous agricultural chemicals according to any one of claims 1 to 3, wherein the moisture content in the spreading agent composition for non-aqueous agricultural chemicals is 2.5% by mass or less.