JPS6299356A - Granular wettable powder composition - Google Patents

Abstract

PURPOSE:To provide the titled composition having improved disintegrability and dispersibility of granular agricultural chemical, by adding an alkyl diphenyl ether disulfonic acid derivative to an active agricultural chemical component. CONSTITUTION:An alkyl diphenyl ether disulfonic acid derivative of formula (R is 6-16C alkyl; M is alkali metal atom, alkaline earth metal corresponding to univalent, ammonium, etc.) is used as a component of the objective composition. Application of an agricultural chemical in the form of wettable powder is widely used as an extremely effective method among application processes of agricultural chemicals. It has been found that the compound of formula is effective to impart granular agricultural chemicals with extremely excellent disintegrability and dispersibility in water as a dispersant giving stable suspending property comparable to powdery wettable powder. The compound of formula can be easily produced by sulfonating an alkyl diphenyl ether by conventional method and neutralizing the product. The amount of the compound added to the composition is usually 2-20wt%.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an agrochemical composition, and more particularly, to an aqueous phase agent for granular agrochemicals containing a dispersant having excellent disintegration and dispersibility throughout the entire thickness. Concerning parabola.

[Conventional technology]

As a method of spraying pesticides, it is widely and generally used as an extremely effective method for spraying pesticide active ingredients in the form of an aqueous phase agent. Until relatively recently, in order to improve the dispersibility of the effective fraction of pesticides, powdered aqueous phase agents containing micronized pesticides have been used. However, in recent years, the safety of spraying pesticides has become a top priority, and the safety and health aspects of powdered aqueous agents due to the heavy dusting during dispersion production have become a problem, and granular aqueous agents have been developed. I've been At the same time, various methods are being studied to improve the dispersibility of granular aqueous phase agents. For example, a method of blending a water-bathable inorganic salt (% Publication No. 53-12577), a method of blending a sugar, a naphthalene sulfonic acid surfactant, and an alkali metal phosphate salt (JP-A-57-163303), A method of combining and blending an anionic surfactant and a nonionic surfactant (t￥f Kaisho 59-1938
No. 03).

[Problem that the invention seeks to solve]

As mentioned above, research has been conducted on the addition of several dispersants to granular wettable powder compositions to ensure the safety of aqueous phase agents. Although it has improved and excellent dispersion properties, its suspension properties at low and high dilution ratios are significantly inferior to powdered aqueous phase agents, and it is difficult to obtain stable and uniform suspension for a long time. As a result of not being able to have sex.

Due to the necessity and problem of redundant dispersion and re-stirring during spraying, efforts were made to develop a dispersant to obtain stable suspension properties similar to those of powdered aqueous phase agents.

[Measures to solve problems]

In order to solve the above-mentioned problems and obtain a granular dispersant with stable suspending properties equivalent to powdery aqueous phase agents, the present inventors have worked diligently on various compounds, especially surfactants. Research mold results.

The present invention was achieved by discovering that the alkyl diphenyl ether disulfonic acid derivative represented by the general formula (I) below provides extremely excellent disintegration properties and water dispersibility to granular agricultural chemicals. In the agent composition, as a dispersant,
General formula%Formula% (wherein, R represents an alkyl group having 6 to 1S carbon atoms, M
is an alkali metal atom, monovalent equivalent alkaline earth gold kI4
Represents an atom, an ammonium group, or an alkyl- or hydroxyalkyl-substituted ammonium group. It is characterized by containing all of the alkyl diphenyl ether disulfonic acid enzyme derivatives having the following properties.

The following are exemplified as typical compounds represented by the above formula (I).

1) Dodecyl diphenyl ether disulfonic acid disodium salt 2) Dodecyl diphenyl ether disulfonic acid disodium salt (
1/2) Calcium salt 3) Octyl diphenyl ether disulfonic acid diammonium salt Dodecyl diphenyl ether disulfonic acid bistriethanolamine salt 5) Hexadecyl diphenyl ether disulfonic acid disodium salt 6) Octyl diphenyl ether disulfonic acid bis trimethylamine salt Formula (I) ) Is the compound represented by alkyldiphenyl ether? : Sulfonated by g@.

Easily produced by neutralization. By disulfonation, 92 sulfone groups are converted to 1 to 2 phenyl groups, respectively.
Although the sulfone groups are introduced one by one, a mixture is obtained without placing the sulfone group in a specific position. It is possible to separate by calorimetric methods such as chromatography, but it is expensive and
Since the effect of isolation is not particularly different from that of a mixture, it is usually used as a mixture.

The coarse particle composition for wettable powders according to the present invention is produced by electroconversion. For example, the compound represented by the formula (I) is added to the active ingredient of the agricultural chemical, and if necessary, carriers commonly used for granule formation, such as unreinforced hydrous sodium silicate, diatomaceous supernatant, clays, white carbon, etc., are used. It is manufactured by methods such as extrusion granulation, spray granulation, transfer granulation, and crushing granulation.

As the agricultural chemical active ingredient, those used as an aqueous phase agent can be used without particular limitation. For example,
MPMC as “Insecticide Offshore”.

XMC, BPMC, MEP, MPP, 72son,
PHC.

BRP, MTMC, NAC, DDVP, diazinon.

PAP, DEP, PMP, formothion, thiometone.

Ethylthiometone, pheninebromo V-to, dimethylvinphos, pyridafenthion, acephate, chlorbenzilate, pirimiphos methyl, binabacryl, dimethoate, ESP, BPPS.

Propaphos j MIPC, Bosalon 1 inch oetoate.

pyrethrin, kelsen, inxathion, salithion,
Examples include CYAP, amitraz, cartap, cvp, and polyoxin as an anti-inflammatory agent.

fusaride, guyfortan, thiophanate methyl,
EDDP, IBP, kasugamycin, streftomycin, ingrothiolane, maneb, ginep, benomyl, propenazole, triazine.

TMTD, TPN, Cabtan, Plasticidin S.

Basic chloride steel, basic i! +: Copper acetate, cupric hydroxide.

Examples of herbicides include polycarbamates and hydroxyisoxazole, and DCMV.

DCPA, cymetrine, virazolate, atrazine.

DBN, IPC, butachlor, nitrazone, oxacyacin, alloxydim, MCCj baraquat dichloride, clomethoxynil, CNP, pentacine,
Penthiocarb, CAT, MCP ethyl, trifluralin, MCPB ethyl, bifenox.

Examples include molinate and dazomet.

The addition rate of the compound having formula (I) varies mainly depending on the agricultural chemical active ingredient, the type of carrier, etc., but is usually 2 to 2.
Addition of approximately 0% by weight is effective. Further, it is also possible to use it in combination with dispersants such as other anionic surfactants, nonionic surfactants, water-based inorganic salts, and water-soluble polymeric substances (PVA, CMC, lignin sulfonate, etc.).

[Implementation Ga]

Next, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited thereto. As a comparative example, a polyoxyalkylene phenyl ether reduced drinking ester salt, which is known to be highly effective as a dispersant for a powdery aqueous phase, was used.

Example 1 After pulverizing and mixing 80 parts of fusaride, 8 parts of clay, and 312 parts of dodecyl diphenyl ether disulfonic acid disodium salt [Nippon Nyukazai 4-layer, Newcol-271A], 20 parts of water was added, and an extrusion granulator [Fuji Paudal@ Pelletized with Penzter EXD m), dried and sieved 1
Granules of 0 to 50 mesh were obtained.

Example 2 85 parts of NAC, 2 parts of white carbon, 3 parts of clay and dodecyl diphenyl ether disulfonic acid di(1/2
) After pulverizing and mixing 10 parts of calcium salt, 20 parts of water and gold were added, and the mixture was granulated using an extrusion granulator (described above). After drying, the surfaces were separated.
10 to 50 pieces of gold granules were obtained.

Example 3 After pulverizing and mixing 40 parts of MEP, 50 parts of white carbon, and 10 parts of octyldiphenyl ether disulfonic acid diammonium salt, all 15 parts of water were added, and a transfer granulator [manufactured by Kurimoto Iron Works Co., Ltd., pan-type granulator KC] was used. Example 4 80 parts of difortan, 10 parts of clay, and 10 parts of dodecyl diphenyl ether disulfonic acid bistriethanolamine salt were pulverized and mixed to obtain granules of 10 to 50 meshes. Example 5 Thio-7anate methyl 75 parts, white carbon 2 parts, clay 11 parts and hexa After pulverizing and mixing 12 parts of decyl diphenyl ether disulfonic acid disodium salt, 20 parts of water was added and granulated using an extrusion granulator (described above). After drying, the mixture was sieved to obtain 10 to 50 mesh granules.

Example 6 50 parts of DCPA, 5 parts of white carbon, 33 parts of clay
1 part and 12 parts of octyl diphenyl ether disulfonic acid bistrimethylamine salt were pulverized and mixed, 15 parts of water was added, and the mixture was granulated using an extrusion granulator. Ta.

Comparative Example 1 Granules were obtained in the same manner as in Example 1 using 80 parts of fusaride, 8 parts of clay, and sodium dodecylbenzenesulfonate ff112mk&.

Comparative Example 2 85 parts NAC, 2 parts white carbon, 3 parts clay
YOCF E, o, (20 mol) Dodecyl phenyl ether + I/rceR ester calcium salt 10 parts k
Granules were obtained in the same manner as in Example 2.

Comparative Example 3 MEP 40 parts, white carbon 50 parts Hiyoto E
, O, (4 mol) Octyl phenyl ether sulfate ammonium salt was used to prepare granules in the same manner as in Example 3.

Comparative Example 4 Granules were obtained in the same manner as in Example 4 using 80 parts of difortan, 10 parts of clay, and 10 parts of dotesylbenzenesulfonic acid triethanolamine salt.

Hikonzuto 1 silicate 5 thiophanate methyl 15 parts, white carbon 2m
, ri L/-11"li and E, O, (15-E:k)
Granules were obtained in the same manner as in Example 5 using 12 parts of nonylphenyl ether sulfate (IJ) salt.

Comparative Example 6 50 parts of DCPA, 5 parts of white carbon, 33 parts of clay
Granules were obtained in the same manner as in Example 6 except that all 1 part and 12 parts of octylbenzenesulfonic acid trimethylamine salt were used.

〔Effect of the invention〕

Next, the effects of the present invention will be specifically explained with reference to test examples.

1) Disintegration test Twelve pieces were placed in a glass petri dish with 3 degree hard water of 50° and a total diameter of 90°, left to stand, and 5 pellets of the sample granulated according to each example and comparative example were added. The time from immediately after the sample was added until the sample no longer retained its particle shape was averaged over all five particles and was defined as the disintegration time. The smaller this value is, the better the disintegrability is.

2) Dispersibility test in water Prepare 12 cylinders filled with 3 degree hard water (150-200), add samples so and p'i granulated according to each example and comparative example, and let stand for 5 minutes. place After being allowed to stand still, the mixture was violently overturned 30 times and the state of dispersion was observed.

After 1 hour, pass through a 250-mesh sieve, wash the residue on the sieve into a beaker with a small amount of water, and measure the weight of the residue after drying. The lower the weight of the residue, the less the problem of clogging the strainer or sprayer nozzle, which is better.

The dispersion state was evaluated as follows.

○: Uniform dispersion, △: Dispersion, ×: Coagulation 3) Suspension test 12 pieces placed in a framed cylinder of 3 degree hard water 200 d'i 250 rnt were oiled, and each example and comparison was applied to this. Add sample 2.51 granulated according to the example. Next, add 3 degree hard water to make the solution 25θ- and leave it for 5 minutes. After leaving it to stand, it was violently inverted 30 times and left to stand again. Gently suck up 225 m/(9/10 volumes) from the top for 1 hour. The sagging rate (hook) was calculated according to the formula.

The larger the suspension ratio, the less redispersion and intensive stirring operations are required during dispersion, and a stable suspension can be obtained for a long time with a single dispersion. Conventional powdered agricultural chemical aqueous phase products are usually manufactured with a suspension ratio of γOq of 6 as the target9, and the larger the value, the more crushed the suspension ratio is, but if it is higher than this, there is no practical problem.

Test results The results of the above tests are summarized in the table below.

As is clear from the above test results, the coagulated granular aqueous phase agent composition according to the present invention has a disintegrability of 9 dispersibility, does not collapse, has an extremely high suspension rate, and forms a stable suspension for a long time. It is something to give.

Claims (1)

[Claims] Formula ▲ Numerical formula, chemical formula, table, etc. ▼ (In the formula, R represents an alkyl group having 6 to 16 carbon atoms, and M
represents an alkali metal atom, a monovalent equivalent alkaline earth metal atom, an ammonium group, or an alkyl- or hydroxyalkyl-substituted ammonium group. ) A granular wettable powder composition with improved disintegrability and dispersibility, characterized by containing a compound having the following properties.