Liquid pesticide composition

Abstract

Provided is a liquid pesticide composition containing iminoctadine albesilate, which is inhibited from forming aggregates and inhibits an increase in particle size during storage at low temperatures. The present invention relates to a liquid pesticide composition comprising iminoctadine albesilate, dodecan-1-ol, an aliphatic higher alcohol alkoxylate, and a sorbitan fatty acid ester.

Description

[Technical field]

[0001] The present invention relates to a liquid pesticide composition. [Background technology]

[0002] Patent Documents 1 and 2 disclose aqueous suspension pesticide formulations containing iminoctadine albesilate. More specifically, Patent Document 1 describes that by blending iminoctadine albesilate with a specific alcohol or phospholipid, a surfactant having an alkyl or alkenyl group having 6 to 20 carbon atoms, and water, an aqueous suspension pesticide formulation can be obtained that maintains a stable suspension state and does not cause crystal precipitation of iminoctadine albesilate under storage conditions in which the temperature changes significantly (50°C to -10°C) over a long period. However, the preparation described in Patent Document 1 does not have sufficient storage stability under storage conditions in which the temperature changes slightly (5°C to -10°C) over a short period. Therefore, Patent Document 2 describes that by using a hydrogenated phospholipid with an iodine value of 20 or less as the phospholipid in the preparation described in Patent Document 1, a stable suspension state can be maintained and crystal precipitation of iminoctadine albesilate can be suppressed even under such storage conditions. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 08-225402 [Patent Document 2] JP 2002-201104 A Summary of the Invention [Problem to be solved by the invention]

[0004] As described above, although conventional aqueous suspension pesticide formulations containing iminoctadine albesilate have excellent storage stability, there is still room for improvement in terms of suppressing the formation of aggregates during production or low-temperature storage and changes in particle size of iminoctadine albesilate.

[0005] The present invention aims to provide a liquid pesticide composition containing iminoctadine albesilate, which suppresses the generation of aggregates and the increase in particle size during storage at low temperatures. [Means for solving the problem]

[0006] The present invention provides the following liquid pesticide composition. [1] A liquid pesticide composition comprising iminoctadine albesilate, dodecan-1-ol, an aliphatic higher alcohol alkoxylate, and a sorbitan fatty acid ester. [2] The liquid pesticide composition according to [1], wherein the content of dodecan-1-ol is 0.75% by mass or more and 6% by mass or less. [3] The liquid pesticide composition according to [1] or [2], wherein the mass ratio of iminoctadine albesilate to dodecan-1-ol is 100:10 to 100:50. [4] The liquid pesticide composition according to any one of [1] to [3], wherein a mass ratio of the aliphatic higher alcohol alkoxylate to the sorbitan fatty acid ester is 3:1 to 1:3. [5] The liquid pesticide composition according to any one of [1] to [4], which has a viscosity at 10°C of 4000 mPa s or less. Effect of the Invention

[0007] According to the present invention, it is possible to provide a liquid pesticide composition containing iminoctadine albesilate, which inhibits the formation of aggregates and inhibits an increase in particle size during storage at low temperatures. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The liquid pesticide composition contains iminoctadine albesilate.

[0009] The content of iminoctadine albesilate in this liquid pesticide composition is usually 1 part by mass or more and 30 parts by mass or less, preferably 5 parts by mass or more and 20 parts by mass or less, more preferably 8 parts by mass or more and 15 parts by mass or less, and even more preferably 10 parts by mass or more and 12 parts by mass or less, per 100 parts by mass of this liquid pesticide composition.

[0010] In the present liquid pesticide composition, iminoctadine albesilate is dispersed in water in the form of oil droplets.

[0011] The liquid pesticide composition contains dodecan-1-ol, an aliphatic higher alcohol alkoxylate, and a sorbitan fatty acid ester (hereinafter, each of these three components is also referred to as the present surfactant).

[0012] The content of dodecan-1-ol in this liquid pesticide composition is usually 0.1 parts by mass or more and 10 parts by mass or less, preferably 0.75 parts by mass or more and 6 parts by mass or less, and more preferably 0.75 parts by mass or more and 4 parts by mass or less, per 100 parts by mass of this liquid pesticide composition.

[0013] In the present liquid pesticide composition, the mass ratio of iminoctadine albesilate to dodecan-1-ol (iminoctadine albesilate:dodecan-1-ol) is usually 100:2 to 100:100, preferably 100:5 to 100:80, and more preferably 100:10 to 100:50.

[0014] The aliphatic higher alcohol alkoxylate is obtained by adding an alkylene oxide to the aliphatic higher alcohol. In this specification, "higher" means that the number of carbon atoms is 8 or more and 20 or less. The aliphatic higher alcohol may be a primary alcohol, a secondary alcohol, or a tertiary alcohol. The aliphatic higher alcohol alkoxylate may have an alkoxylation degree of 1 or more and 50 or less, 5 or more and 25 or less, or 5 or more and 15 or less. Examples of the aliphatic higher alcohol alkoxylate include aliphatic higher alcohol ethoxylate and aliphatic higher alcohol propoxylate. One or more types of aliphatic higher alcohol alkoxylates can be used.

[0015] The aliphatic higher alcohol alkoxylate has a hydrocarbon group derived from an aliphatic higher alcohol. The number of carbon atoms in the hydrocarbon group is 8 to 20, and may be 10 to 20, 12 to 20, 14 to 20, or 16 to 20. The aliphatic higher alcohol alkoxylate may be an aliphatic primary higher alcohol alkoxylate, an aliphatic secondary higher alcohol alkoxylate, or an aliphatic tertiary higher alcohol alkoxylate. Specific examples of the aliphatic higher alcohol alkoxylate include lauryl alcohol ethoxylate, myristyl alcohol ethoxylate, cetyl alcohol ethoxylate, palmityl alcohol ethoxylate, isostearyl alcohol ethoxylate, stearyl alcohol ethoxylate, oleyl alcohol ethoxylate, lauryl alcohol propoxylate, myristyl alcohol propoxylate, cetyl alcohol propoxylate, palmityl alcohol propoxylate, isostearyl alcohol propoxylate, stearyl alcohol propoxylate, and oleyl alcohol propoxylate. One or more types of aliphatic higher alcohol alkoxylates can be used.

[0016] The content of the aliphatic higher alcohol alkoxylate in this liquid pesticide composition is usually 0.1 parts by mass or more and 10 parts by mass or less, preferably 0.5 parts by mass or more and 5 parts by mass or less, and more preferably 0.5 parts by mass or more and 3 parts by mass or less, per 100 parts by mass of this liquid pesticide composition.

[0017] In the present liquid pesticide composition, the mass ratio of iminoctadine albesilate to the aliphatic higher alcohol alkoxylate (iminoctadine albesilate:aliphatic higher alcohol alkoxylate) is usually 100:1 to 100:100, preferably 100:2 to 100:50, and more preferably 100:4 to 100:25.

[0018] Examples of sorbitan fatty acid esters include sorbitan laurate, sorbitan stearate, sorbitan oleate, and sorbitan trioleate. The sorbitan fatty acid ester may be a polyoxyalkylene sorbitan fatty acid ester to which an alkylene oxide is added, but is preferably a sorbitan fatty acid ester to which no alkylene oxide is added. Examples of polyoxyalkylene sorbitan fatty acid esters include polyoxyethylene sorbitan laurate, polyoxyethylene sorbitan stearate, polyoxyethylene sorbitan oleate, and polyoxyethylene sorbitan trioleate. One or more types of sorbitan fatty acid esters can be used.

[0019] The content of the sorbitan fatty acid ester in this liquid pesticide composition is usually 0.1 parts by mass or more and 10 parts by mass or less, preferably 0.5 parts by mass or more and 5 parts by mass or less, and more preferably 0.5 parts by mass or more and 3 parts by mass or less, per 100 parts by mass of this liquid pesticide composition.

[0020] In the present liquid pesticide composition, the mass ratio of iminoctadine albesilate to sorbitan fatty acid ester (iminoctadine albesilate:sorbitan fatty acid ester) is usually 100:1 to 100:100, preferably 100:2 to 100:50, and more preferably 100:4 to 100:25.

[0021] In the present liquid pesticide composition, the mass ratio of dodecan-1-ol to the aliphatic higher alcohol alkoxylate (dodecan-1-ol:aliphatic higher alcohol alkoxylate) is usually 10:1 to 1:10, preferably 8:1 to 1:8, and more preferably 4:1 to 1:4.

[0022] In the present liquid pesticide composition, the mass ratio of dodecan-1-ol to sorbitan fatty acid ester (dodecan-1-ol:sorbitan fatty acid ester) is usually 10:1 to 1:10, preferably 8:1 to 1:8, and more preferably 4:1 to 1:4.

[0023] In the present liquid pesticide composition, the mass ratio of the aliphatic higher alcohol alkoxylate to the sorbitan fatty acid ester (aliphatic higher alcohol alkoxylate:sorbitan fatty acid ester) is usually 10:1 to 1:10, preferably 5:1 to 1:5, and more preferably 3:1 to 1:3.

[0024] In this liquid pesticide composition, when the total content of the surfactant is 100 parts by mass, the content of dodecan-1-ol is usually 10 parts by mass or more and 80 parts by mass or less, preferably 15 parts by mass or more and 75 parts by mass or less, and more preferably 20 parts by mass or more and 70 parts by mass or less.

[0025] In this liquid pesticide composition, when the total content of the surfactant is 100 parts by mass, the content of the aliphatic higher alcohol alkoxylate is usually 5 parts by mass or more and 70 parts by mass or less, preferably 8 parts by mass or more and 60 parts by mass or less, and more preferably 10 parts by mass or more and 50 parts by mass or less.

[0026] In this liquid pesticide composition, when the total content of the surfactant is 100 parts by mass, the content of the sorbitan fatty acid ester is usually 5 parts by mass or more and 70 parts by mass or less, preferably 8 parts by mass or more and 60 parts by mass or less, and more preferably 10 parts by mass or more and 50 parts by mass or less.

[0027] In the liquid pesticide composition, the surfactants can function as dispersion stabilizers for iminoctadine albesilate. According to the present invention, by combining three components, dodecan-1-ol, aliphatic higher alcohol alkoxylate, and sorbitan fatty acid ester, it is possible to suppress the generation of aggregates and the increase in particle size during low-temperature storage, even though the composition contains iminoctadine albesilate.

[0028] In this liquid pesticide composition, when the content of iminoctadine albesilate is 100 parts by mass, the total content of the surfactants is usually 5 parts by mass or more and 100 parts by mass or less, preferably 10 parts by mass or more and 90 parts by mass or less, and more preferably 20 parts by mass or more and 80 parts by mass or less.

[0029] The liquid pesticide composition usually contains water. Examples of water include ion-exchanged water, tap water, and groundwater. The content of water in the liquid pesticide composition is usually 10 parts by mass or more and 90 parts by mass or less, preferably 20 parts by mass or more and 80 parts by mass or less, more preferably 30 parts by mass or more and 75 parts by mass or less, in 100 parts by mass of the liquid pesticide composition.

[0030] The liquid pesticide composition may contain other components other than those described above, as necessary. Examples of other components include pesticide active ingredients other than iminoctadine albesilate, surfactants other than the present surfactant, and formulation auxiliaries.

[0031] The liquid pesticide composition may contain one or more pesticide active ingredients other than iminoctadine albesilate as necessary. Examples of other pesticide active ingredients include insecticidal active ingredients, fungicidal active ingredients and herbicidal active ingredients. It has been confirmed that the effect of the present invention can be obtained even when the liquid pesticide composition further contains other pesticide active ingredients other than iminoctadine albesilate.

[0032] In the present liquid pesticide composition, the pesticide active ingredient other than iminoctadine albesilate may be dispersed in water in a solid state or in an oil droplet state.

[0033] The liquid pesticide composition may contain one or more other surfactants other than the surfactant of the present invention, if necessary. When the liquid pesticide composition further contains other pesticide active ingredients other than iminoctadine albesilate, the other surfactants may be contained, if necessary, in order to disperse the other pesticide active ingredients in water. Examples of the other surfactants include nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants.

[0034] Examples of nonionic surfactants include: Polyoxyethylene polyoxypropylene (EO-PO) block copolymers; polyoxyalkylene fatty acid esters such as polyoxyethylene fatty acid esters and polyoxyethylene polyoxypropylene fatty acid esters; polyoxyalkylene polyaryl ethers such as polyoxyethylene tristyrylphenyl ether, polyoxyethylene polyaryl ether, and polyoxyethylene polyoxypropylene polyaryl ether; Polyoxyalkylene alkylaryl ethers such as polyoxyethylene alkylaryl ethers and polyoxyethylene polyoxypropylene alkylaryl ethers; polyoxyalkylene vegetable oils such as polyoxyethylene castor oil and polyoxyethylene polyoxypropylene castor oil; Polyoxyalkylene hydrogenated vegetable oils such as polyoxyethylene hydrogenated castor oil; Glycerol fatty acid ester Examples include:

[0035] Examples of the anionic surfactant include: Alkylarylsulfonates such as dodecylbenzenesulfonates and alkylnaphthalenesulfonates; Dialkyl sulfosuccinates such as di(2-ethylhexyl) sulfosuccinate; Polyoxyalkylene polyaryl ether sulfates, such as polyoxyethylene distyryl phenyl ether sulfates; Polyoxyalkylene polyaryl ether phosphate salts such as polyoxyethylene tristyryl phenyl ether phosphate salts Examples include:

[0036] Examples of the sulfonate, sulfate ester salt, and phosphate ester salt include sodium salt, potassium salt, calcium salt, and ammonium salt.

[0037] Examples of cationic surfactants include: Alkylamine hydrochlorides such as dodecylamine hydrochloride; alkyl quaternary ammonium salts, such as dodecyltrimethylammonium salts, alkyldimethylbenzylammonium salts, alkylpyridinium salts, alkylisoquinolinium salts, and dialkylmorpholinium salts; Benzethonium chloride; Polyalkylvinylpyridinium salts Examples include:

[0038] Examples of amphoteric surfactants include N-lauryl alanine, N,N,N-trimethylaminopropionic acid, N,N,N-trihydroxyethylaminopropionic acid, N-hexyl-N,N-dimethylaminoacetic acid, and 1-(2-carboxyethyl)pyrimidinium betaine. In order to reduce the viscosity at low temperatures, it is preferable that the liquid pesticide composition does not contain phospholipids, hydrogenated phospholipids, lecithin, soybean lecithin, and hydrogenated lecithin. Liquid pesticide compositions containing these components tend to have high viscosity at low temperatures (e.g., 10°C).

[0039] The content of surfactants other than the present surfactant in the present liquid pesticide composition is usually 1 part by mass or more and 30 parts by mass or less, preferably 2 parts by mass or more and 20 parts by mass or less, and more preferably 3 parts by mass or more and 15 parts by mass or less, per 100 parts by mass of the present liquid pesticide composition.

[0040] Formulation aids include thickeners, preservatives, antifreeze agents, and antifoaming agents.

[0041] Examples of thickeners include polysaccharides such as xanthan gum, guar gum, welan gum, diutan gum, and cellulose nanofiber, clay, and silicate. The liquid pesticide composition can contain one or more thickeners. The content of the thickener in the liquid pesticide composition is usually 0.01 to 5 parts by mass, preferably 0.05 to 3 parts by mass, and more preferably 0.1 to 1 part by mass, per 100 parts by mass of the liquid pesticide composition.

[0042] Examples of preservatives include p-hydroxybenzoic acid esters, salicylic acid derivatives, and isothiazolinone preservatives. The liquid pesticide composition may contain one or more preservatives. The content of the preservative in the liquid pesticide composition is usually 0.01 to 1 part by mass, preferably 0.05 to 0.5 parts by mass, per 100 parts by mass of the liquid pesticide composition.

[0043] Examples of antifreezing agents include ethylene glycol, propylene glycol, urea, and glycerin. The liquid pesticide composition may contain one or more antifreezing agents. The content of the antifreezing agent in the liquid pesticide composition is usually 1 part by mass to 10 parts by mass, preferably 2 parts by mass to 5 parts by mass, in 100 parts by mass of the liquid pesticide composition.

[0044] The defoaming agent may be, for example, a silicone-based defoaming agent. The liquid pesticide composition may contain one or more defoaming agents. The content of the defoaming agent in the liquid pesticide composition is usually 0.01 to 1 part by mass, preferably 0.05 to 0.5 parts by mass, in 100 parts by mass of the liquid pesticide composition.

[0045] The particle size of the liquid pesticide composition is the particle size (volume median diameter) that is 50% cumulative on a volume basis in the particle size distribution. The particle size (volume median diameter) of the liquid pesticide composition can be measured by a laser diffraction scattering method (dispersion medium: ion-exchanged water, refractive index: [sample] 1.8-0.2i, refractive index: [dispersion medium] 1.333) using a laser diffraction / scattering type particle size distribution device (LA-950V2, manufactured by Horiba, Ltd.). In the liquid pesticide composition, the particle size (volume median diameter) of the pesticide active ingredient is usually 20 μm or less, preferably 0.1 μm or more and 10 μm or less.

[0046] In this liquid pesticide composition, the increase in particle size of the pesticide active ingredient during low-temperature storage is suppressed. Specifically, the particle size change rate (%) represented by the following formula when this liquid pesticide composition is stored at a temperature of -5°C for 2 weeks can be suppressed to less than 140%, preferably less than 130%, more preferably less than 125%, and even more preferably less than 120%. Particle size change rate (%) = 100 × (particle size after storage at -5°C for 2 weeks) / (particle size immediately after production)

[0047] The viscosity of the liquid pesticide composition can be measured using a B-type viscometer. 200 mL of the liquid pesticide composition is placed in a 200 mL beaker and left to stand in a thermostatic water bath set at 5 ° C., 10 ° C., or 20 ° C. After confirming that the temperature of the liquid pesticide composition is within the measurement temperature ± 1 ° C., the viscosity is measured using a B-type viscometer (TVB-15M type, Toki Sangyo Co., Ltd., rotor No. 2, rotation speed: 6 rpm, measurement temperature: 5 ° C., 10 ° C., or 20 ° C.). The viscosity of the liquid pesticide composition measured using a B-type viscometer (TVB-15M type, Toki Sangyo Co., Ltd., rotor No. 2, rotation speed: 6 rpm, measurement temperature: 5 ° C., 10 ° C., or 20 ° C.) is usually 5000 mPa s or less, preferably 4000 mPa s or less, more preferably 3000 mPa s or less, and even more preferably 2000 mPa s or less. When the viscosity of the liquid pesticide composition is within the above range, the storage stability at low temperatures tends to be good. Specifically, the handling during use is improved, and for example, it is not necessary to return the composition to room temperature (e.g., 20°C) after storage at low temperatures, and the composition can be used as is. When the viscosity is 5000 mPa·s or more, it is measured using rotor No. 3. The liquid pesticide compositions described in Patent Documents 1 and 2 may lose fluidity or become thick and creamy when stored at low temperatures, and also tend to have a high viscosity at low temperatures.

[0048] The liquid pesticide composition can be suitably used in the agricultural field as an aqueous suspension formulation, an aqueous emulsion formulation, or a suspoemulsion formulation. The liquid pesticide composition can also be used to prepare other pesticide formulations, such as emulsions, oil suspension formulations, oil emulsion formulations, microemulsions, and microcapsule formulations.

[0049] The present liquid pesticide composition contains iminoctadine albesilate as the pesticide active ingredient, and by combining dodecan-1-ol, aliphatic higher alcohol alkoxylate, and sorbitan fatty acid ester, the occurrence of aggregates can be suppressed, and the increase in particle size during low-temperature storage can be suppressed. Specifically, the present liquid pesticide composition is less likely to cause aggregates immediately after production and during low-temperature storage, and the increase in particle size during low-temperature storage tends to be suppressed.

[0050] The liquid pesticide composition can be produced by mixing iminoctadine albesilate, dodecan-1-ol, aliphatic higher alcohol alkoxylate, and sorbitan fatty acid ester, and, if necessary, other components. The method for producing the liquid pesticide composition includes a step of mixing iminoctadine albesilate, dodecan-1-ol, aliphatic higher alcohol alkoxylate, and sorbitan fatty acid ester to obtain an emulsion. The method for producing the liquid pesticide composition can further include a step of mixing the emulsion, water, and, if necessary, formulation auxiliary to obtain an aqueous emulsion formulation. The method for producing the liquid pesticide composition can further include a step of mixing the aqueous emulsion formulation and other pesticide formulations to obtain a suspoemulsion agent.

[0051] The liquid pesticide composition can be diluted with water as necessary and applied to paddy fields, fields, orchards, lawns, non-agricultural lands, etc. The liquid pesticide composition can also be sprayed on plants growing in paddy fields, etc., or on the soil of paddy fields, etc. Application methods include, for example, soil surface spraying and foliage spraying. The liquid pesticide composition or a diluted solution thereof can also be used for seed treatment, seedling box treatment, etc. EXAMPLES

[0052] The present invention will be described in more detail below with reference to Production Examples and Comparative Production Examples, but the present invention is not limited to these examples.

[0053] <Production Example 1> (Process 1) 13.70 parts by mass of iminoctadine albesilate stock solution, 2.00 parts by mass of antifreeze (trade name: monoethylene glycol), 2.00 parts by mass of dodecan-1-ol (trade name: Kalcol 2098), 0.50 parts by mass of oleyl alcohol ethoxylate (trade name: Newcalgen D-1518), and 0.50 parts by mass of sorbitan fatty acid ester (trade name: Newcalgen D-931) were mixed and stirred to obtain 18.70 parts by mass of an oil phase. (Process 2) 42.58 parts by mass of ion-exchanged water and 0.14 parts by mass of an antifoaming agent (product name: KS-538) were mixed and stirred using a homogenizer, while 18.70 parts by mass of the oil phase obtained in step 1 was added to obtain 61.42 parts by mass of an emulsion.

[0054] (Step 3) 5.66 parts by mass of ion-exchanged water, 2.86 parts by mass of anionic surfactant (trade name: SOPROPHOR FLK), 0.06 parts by mass of antifoaming agent (trade name: KS-538), and 10.00 parts by mass of pyridaclomethyl were mixed, stirred, and wet-pulverized using a bead mill to obtain 18.58 parts by mass of suspension. Note that SOPROPHOR FLK is a surfactant that is generally suitable for dispersing solid substances at room temperature, so it was used to disperse pyridaclomethyl, which is a bactericidal active ingredient. In addition, it has been confirmed by experiments that the storage stability of the above suspension at low temperatures is good (especially, there is no problem of increase in particle size during storage at low temperatures).

[0055] (Step 4) A thickener (trade name: Veegum R 0.24 parts by mass and trade name: Kelzan SPlus 0.12 parts by mass), a preservative (trade name: Proxel GXL(S)) 0.20 parts by mass, and 19.44 parts by mass of ion-exchanged water were mixed to obtain 20.00 parts by mass of a thickener-containing liquid.

[0056] (Step 5) 61.42 parts by mass of the emulsion prepared in step 2, 18.58 parts by mass of the suspension prepared in step 3, and 20.00 parts by mass of the thickener-containing liquid prepared in step 4 were mixed to obtain a liquid pesticide composition.

[0057] The compositions of the liquid pesticide compositions are shown in Tables 1 to 3. In Tables 1 to 3, "Balance" refers to the remaining blended ingredients other than water when the total amount of the liquid pesticide composition is 100 parts by mass, that is, the amount of water added so that the total amount of the liquid pesticide composition becomes 100 parts by mass.

[0058] <Production Example 2> A liquid pesticide composition was obtained in the same manner as in Production Example 1, except that the blending amounts of the blended components were as shown in Table 1.

[0059] <Production Example 3> (Process 1) 13.70 parts by mass of iminoctadine albesilate stock solution, 1.20 parts by mass of dodecan-1-ol (trade name: Kalcol 2098), 0.50 parts by mass of oleyl alcohol ethoxylate (trade name: Newcalgen D-1518), and 1.50 parts by mass of sorbitan fatty acid ester (trade name: Newcalgen D-931) were mixed and stirred to obtain 16.90 parts by mass of an oil phase. (Process 2) 44.38 parts by mass of ion-exchanged water and 0.14 parts by mass of an antifoaming agent (product name: KS-538) were mixed and stirred using a homogenizer, while 16.90 parts by mass of the oil phase obtained in step 1 was further added to obtain 61.42 parts by mass of an emulsion.

[0060] (Step 3) 5.66 parts by mass of ion-exchanged water, 2.86 parts by mass of anionic surfactant (trade name: SOPROPHOR FLK), 0.06 parts by mass of an antifoaming agent (trade name: KS-538), and 10.00 parts by mass of pyridaclomethyl were mixed, stirred, and wet-pulverized using a bead mill to obtain 18.58 parts by mass of a suspension.

[0061] (Step 4) A thickener (trade name: Veegum R 0.24 parts by mass and trade name: Kelzan SPlus 0.12 parts by mass), a preservative (trade name: Proxel GXL(S)) 0.20 parts by mass, and 19.44 parts by mass of ion-exchanged water were mixed to obtain 20.00 parts by mass of a thickener-containing liquid.

[0062] (Step 5) 61.42 parts by mass of the emulsion prepared in step 2, 18.58 parts by mass of the suspension prepared in step 3, and 20.00 parts by mass of the thickener-containing liquid prepared in step 4 were mixed to obtain a liquid pesticide composition.

[0063] <Production Example 4> A liquid pesticide composition was obtained in the same manner as in Production Example 3, except that the blending amounts of the blended components were as shown in Table 1.

[0064] <Production Example 5> A liquid pesticide composition was obtained in the same manner as in Production Example 1, except that the blending amounts of the blended components were as shown in Table 1.

[0065] <Production Example 6> A liquid pesticide composition was obtained in the same manner as in Production Example 1, except that in step 2, 3.00 parts by mass of an anionic surfactant (product name: SOPROPHOR FLK) was added to the ion-exchanged water, the amount of ion-exchanged water was adjusted so that the emulsion became 61.42 parts by mass, and the amounts of the blended components were as shown in Table 1.

[0066] <Production Example 7> A liquid pesticide composition was obtained in the same manner as in Production Example 1, except that in steps 2 and 3, an antifoaming agent (trade name: XIEAMETER ACP-1500) was used instead of the antifoaming agent (trade name: KS-538), in step 2, 3.00 parts by mass of anionic surfactant (trade name: SOPROPHOR FLK) was added to the ion-exchanged water, the amount of ion-exchanged water was adjusted so that the emulsion became 61.42 parts by mass, and the amounts of the blended components were as shown in Table 1.

[0067] <Production Example 8> A liquid pesticide composition was obtained in the same manner as in Production Example 1, except that the blending amounts of the blended components were as shown in Table 1.

[0068] <Production Examples 9 to 14> A liquid pesticide composition was obtained in the same manner as in Production Example 3, except that the blending amounts of the blended components were as shown in Table 1.

[0069] <Comparative Manufacturing Example 1> A liquid pesticide composition was obtained in the same manner as in Production Example 7, except that the blending amounts of the blended components were as shown in Table 1.

[0070] <Comparative Manufacturing Examples 2 to 4> A liquid pesticide composition was obtained in the same manner as in Production Example 1, except that the blending amounts of the blended components were as shown in Table 1.

[0071] <Comparative Manufacturing Examples 5 to 7> A liquid pesticide composition was obtained in the same manner as in Production Example 3, except that the types and amounts of the ingredients were as shown in Table 1. Note that polyoxyethylene castor oil ether (trade name: Newcalgen D-230) and EO-PO block polymer (trade name: Stepflow 26F) were used in step 1.

[0072] <Comparative Manufacturing Example 8> (Process 1) 13.70 parts by mass of iminoctadine albesilate stock solution, 3.70 parts by mass of dodecan-1-ol (trade name: Kalcol 2098), 1.00 parts by mass of hydrogenated lecithin (trade name: SLP-White H), and 2.00 parts by mass of hexaglycerin stearate (trade name: MS-5S) were mixed and stirred to obtain 20.40 parts by mass of an oil phase. (Process 2) 40.88 parts by mass of ion-exchanged water and 0.14 parts by mass of an antifoaming agent (product name: KS-538) were mixed and stirred using a homogenizer, while 20.40 parts by mass of the oil phase obtained in step 1 was added to obtain 61.42 parts by mass of an emulsion.

[0073] (Step 3) 5.66 parts by mass of ion-exchanged water, 2.86 parts by mass of anionic surfactant (trade name: SOPROPHOR FLK), 0.06 parts by mass of an antifoaming agent (trade name: KS-538), and 10.00 parts by mass of pyridaclomethyl were mixed, stirred, and wet-pulverized using a bead mill to obtain 18.58 parts by mass of a suspension.

[0074] (Step 4) A thickener (trade name: Veegum R 0.24 parts by mass and trade name: Kelzan SPlus 0.12 parts by mass), a preservative (trade name: Proxel GXL(S)) 0.20 parts by mass, and 19.44 parts by mass of ion-exchanged water were mixed to obtain 20.00 parts by mass of a thickener-containing liquid.

[0075] (Step 5) 61.42 parts by mass of the emulsion prepared in step 2, 18.58 parts by mass of the suspension prepared in step 3, and 20.00 parts by mass of the thickener-containing liquid prepared in step 4 were mixed to obtain a liquid pesticide composition.

[0076] [Manufacturability of emulsion] The emulsion immediately after preparation in step 2 was visually observed, and the manufacturability of the emulsion was evaluated according to the following evaluation criteria. The results are shown in Tables 1 and 2. In addition, in the case of ×, the manufacturability of the emulsion was judged to be extremely poor. ○: Uniform or fluid ×: Not uniform or has no fluidity

[0077] [Occurrence of aggregates] The liquid pesticide composition immediately after production in step 5 was visually observed to determine whether or not there were any clumps of aggregates. If aggregates could be detected, the liquid pesticide composition was mixed by inverting the container. If the aggregates could not be dispersed by mixing, it was determined that aggregates had occurred. In addition, for the liquid pesticide composition stored at -5°C for 2 weeks, the composition was returned to room temperature and the occurrence of aggregates was confirmed by the same method. The results are shown in Tables 1 and 2. ○: No agglomerates were generated ×: Aggregates formed

[0078] [Particle size change rate] The volume median diameter was measured by a laser diffraction scattering method for each of the liquid pesticide composition immediately after production in step 5 and the liquid pesticide composition after storage at -5 ° C for 2 weeks. For the liquid pesticide composition after storage at -5 ° C for 2 weeks, the liquid pesticide composition was returned to room temperature and then measured. When the measurement result of the liquid pesticide composition immediately after production in step 5 is A and the measurement result of the same liquid pesticide composition after storage at -5 ° C for 2 weeks is B, the particle diameter change rate X was calculated by the following formula. When the particle diameter change rate is less than 140%, it is determined that the increase in particle diameter during low-temperature storage is suppressed, and it is marked as ○. The results are shown in Tables 1 and 2. In Table 2, "Cannot be measured" means that the particle diameter could not be measured because aggregates were generated immediately after production or after storage at -5 ° C for 2 weeks, and the liquid pesticide composition was non-uniform. X(%)=100×B / A

[0079] [viscosity] 200 mL of the liquid pesticide composition of Production Example 7 was placed in a 200 mL beaker and allowed to stand in a thermostatic water bath set at 5°C. After confirming that the temperature of the liquid pesticide composition of Production Example 7 was 5±1°C, the viscosity was measured using a B-type viscometer (TVB-15M model, Toki Sangyo Co., Ltd., rotor No. 2, rotation speed: 6 rpm, measurement temperature: 5°C). The viscosity at 10°C or 20°C was also measured in the same manner. The viscosity of the liquid pesticide composition of Comparative Production Example 8 at 5°C, 10°C or 20°C was also measured in the same manner. However, when the viscosity was 5000 mPa·s or more, the measurement was performed using rotor No. 3.

[0080] [Table 1]

[0081] [Table 2]

[0082] [Table 3]

[0083] The product names used in the examples are explained as follows: Iminoctadine albesilate stock solution: a mixture of 73 wt% iminoctadine albesilate, 12.0 wt% ethylene glycol, 13.0 wt% water, and 2 wt% methanol, manufactured by Nippon Soda; SOPROPHOR FLK: Polyoxyethylene tristyryl phenyl ether phosphate ester potassium salt, manufactured by Solvay Nicca; Monoethylene glycol: Ethylene glycol, manufactured by Mitsui Chemicals; Dodecan-1-ol: Kalcol 2098, manufactured by Kao; Aliphatic higher alcohol alkoxylate: New Calgen D-1518, manufactured by Takemoto Oil and Fat; Sorbitan fatty acid ester: New Calgen D-931, manufactured by Takemoto Oil and Fat; KS-538: Silicone-based mixture, manufactured by Shin-Etsu Chemical Co., Ltd.; Veegum R: Smectite clay, manufactured by RTVanderbilt Company.Inc; Kelzan S Plus: Xanthan gum, manufactured by CP Kelco; Proxel GXL(S): 1,2-benzisothiazolin-3-one, manufactured by Arcsada Japan; XIEAMETER ACP-1500: Dimethylsiloxane treated silica, Dow Chemical made in Japan; Polyoxyethylene castor oil ether: New Calgen D-230, manufactured by Takemoto Oils and Fat; EO-PO block polymer: Stepflow 26F, manufactured by STEPAN; SLP-White H: Hydrogenated lecithin (iodine value 10 or less), manufactured by Tsuji Oil Co., Ltd.; MS-5S: hexaglycerin stearate, manufactured by Sakamoto Pharmaceutical Co., Ltd.;

Claims

1. iminoctadine albesilate, dodecan-1-ol, Aliphatic higher alcohol alkoxylates, Sorbitan fatty acid esters, and Contains water, The iminoctadine albesilate is dispersed in water in the form of oil droplets. Liquid pesticide composition.

2. The content of dodecan-1-ol is 0.75% by mass or more and 6% by mass or less. The liquid pesticide composition according to claim 1.

3. The mass ratio of iminoctadine albesilate to dodecan-1-ol is 100:10 to 100:50; The liquid pesticide composition according to claim 1 or 2.

4. The mass ratio of the aliphatic higher alcohol alkoxylate to the sorbitan fatty acid ester is 3:1 to 1:

3. The liquid pesticide composition according to claim 1 or 2.

5. The viscosity at 10°C is 4000 mPa·s or less. The liquid pesticide composition according to claim 1 or 2.

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