JPS60163801A - Aggregation inhibitor - Google Patents

Abstract

PURPOSE:An aggregation inhibitor, consisting essentially of a sulfonate of an alkyl diphenyl ether, capable of preventing aggregation in mixing and formulating paraquat with a water-insoluble biocide without reduction in controlling effect nor occurrence of phytotoxicity, etc. CONSTITUTION:An aggregation inhibitor consisting essentially of a sulfonate of an alkyl diphenyl ether expressed by formula I [R is 1-22C alkyl or alkenyl; M is alkali (earth) metal, NH4 or substituted ammonium expressed by formula II(R<1> and R<2> are H or 1-4C alkyl; R<3> is benzyl, phenyl, cyclohexyl, etc.)] is added to a mixed pharmaceutical of paraquat or diguat which is a foliar contact type extermination controlling agent with a water-insoluble biocide to form a safe complex salt and prevent the aggregation of the above-mentioned biocide without deteriorating water-solubility of the paraquat. EFFECT:Occurrence of aggregates in formulating a mixed biocide or using by diolution and mixing can be prevented, and trouble in application work, etc. can be eliminated due to reduction in controlling effect.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to anti-flocculants, and more particularly to anti-flocculants for mixed formulations of paraquat or diquat and water-insoluble biocides.

Stalk-leaf contact herbicides such as paraquat and diquat are widely used, but they are completely ineffective in soil treatment before weed germination. For this reason, various studies have been conducted to formulate mixed formulations with soil-treated pre-emergence herbicides, but since they have strong cationic chemical structures unique to paraquat, diquat, and dipyridylium herbicides, they are not effective for water-insoluble biocides or In particular, aggregates were formed with anionic emulsifiers such as alkylbenzene sulfonates, making it impossible to obtain a homogeneous liquid biocidal preparation.

Therefore, the present inventor conducted extensive research in order to obtain a homogeneous liquid mixed biocide preparation that would not cause aggregation even if paraquat or diquat and a water-insoluble agricultural chemical component were mixed into a preparation. mi
The present invention was completed by discovering that by using +, a stable complex salt can be formed without reducing the water solubility of paraquat or diquat, and as a result, it is possible to prevent the occurrence of aggregation with the water-insoluble biocide to be mixed or the emulsifier used. 7.

That is, the present invention provides an anti-aggregation agent for a mixed preparation of paraquat or diquat and a water-insoluble biocide, which contains a sulfonate of an alkyl diphenyl ether as an essential component. The acid salt is easily produced by sulfonating and neutralizing an alkyldiphenyl ether by a known method. The sulfonate may be either monosulfonate or disulfone Mm, but among the disulfonate, compounds represented by the following general formula (■) are particularly preferred.

(In the formula, R is an alkyl group or alkenyl group having 1 to 22 carbon atoms, M is an alkali metal, an alkaline earth metal, N
H4 or substituted ammonium. ) In the present invention, the substituted ammonium includes not only the ammonium of alkanolamines but also the ammonium represented by the following general formula (■), and zowara is particularly preferred.

1 (wherein, R, R, hydrogen, alkyl having 1 to 4 carbon atoms y+4i
-c6, R5 benzyl group, phenyl group,
It is a cyclohexyl group or an alkyl or alkenyl group having 6 to 22 carbon atoms. ) In carrying out the present invention, it is necessary to add the anti-aggregation agent of the present invention to the mixed preparation.
It goes without saying that if the anti-aggregation agent of the present invention is added to a diquat solution, it will have the same anti-aggregation effect even when diluted and mixed with other water-insoluble biocide preparations during use. The anti-agglomerating agent of the present invention can prevent the formation of aggregates when forming a mixed biocide formulation or diluting the mixture, making it possible to spray uniformly, resulting in a decrease in the control effect, occurrence of chemical damage, and problems during spraying work. etc. can be eliminated.

When the water-insoluble biocide used in combination with paraquat and diquat is in liquid form, it can be used in combination with the anti-flocculating agent of the present invention and a nonionic surfactant, even at temperatures ranging from -5 to 50°C. A homogeneous transparent liquid preparation without separation or sedimentation can be produced.

In addition, if the water-insoluble biocide to be mixed and used is a paste or solid, it is also possible to dissolve the water-insoluble biocide using a small amount of a specific solvent to form a homogeneous transparent liquid preparation.
Furthermore, a suspended homogeneous liquid mixed preparation can also be obtained by wet grinding without using any mechanical additives. The organic solvent used here may be any organic solvent as long as it dissolves the water-insoluble agricultural chemical substance to be mixed.

Examples of water-insoluble biocides that can be used in the practice of the present invention include triazine-based 5-biocides such as atrazine (2-chloro-4-ethylamino-6-ipropylamino-S-) lyazine. ), ametrine (2-methylthio-4-ethylamino-
6-isopropylamino-S-triazine), simetrine (2-methylthio-4,6-bisethylamino-S-
) riazine), urea-based biocides include linuron (3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea), DOMU (3-(3,4-dichlorophenyl)- Examples of the diphenyl ether biocide include chlormethoxynil (2,4 Examples of the thiocarbamate biocide include penthiocarb (S-dichlorophenyl-37-medoxy-47-nitrophenyl ether), N-P(2,4-dichlorophenyl-4'-nitrophenyl ether), and (4-chlorobenzyl)-N,N-diethylthiocarbamate), dinitroaniline-based biocide, for example, trifluralin (α, α,
α-trifluoro-2,6-sinitro-N, N-dipropyl-valatoluidine), uracil-based biocides include butachlor (2-chloro-2',6'-diethyl-N-(butoxymethyl)acetanilide), etc. However, it is not limited to these.

The nonionic surfactant that can be used with the anti-aggregation agent of the present invention can be any surfactant that is generally used as an agrochemical emulsifier, such as polyoxyalkylene alkyl ether, polyoxyalkylene styrenated phenol ether, polyoxyalkylene styrenated phenol ether, Oxyalkylene tribenzilf! / -A/ Neil, polyoxyalkylene alkyl ester, polyoxyalkylene alkylphenol ether, etc. are used.

Anionic surfactants can also be used with the anti-aggregation agents of the present invention. Examples of anionic surfactants that can be used include alkylnaphthalene sulfonates,
Examples include, but are not limited to, polyoxyalkylene algyl sulfates, polyoxyalkylene styrenated phenol ether phosphates, polyoxyalkylene alkylphenyl ether sulfates, and alkyl sulfates.

The amount of the anti-aggregation agent of the present invention used is usually 1 to 2 in mixed preparations.
0% by weight, preferably 2-10% by weight.

Furthermore, the amount of the emulsifier used in the anti-aggregation agent of the present invention is not particularly limited.

The performance of a mixed preparation using the anti-aggregation agent of the present invention will be explained below using Examples.

Emulsifier formulation example■ Lauryl diphenyl ether disulfonic acid octylamine salt 50 parts by weight Polyoxyethylene (40) styrenated phenol ether 501 parts by weight Emulsifier formulation example■ 5 IJ diphenyl ether disulfonic acid triethanolamine salt 50 parts by weight Emulsifier formulation example■ Emulsifier Formulation example ■ Emulsifier formulation example ■ 9- Acid base on alkyl 5 25 〃 Emulsifier formulation comparison example ■ Dodecylbenzenesulfonic acid calcium salt 50 parts by weight Emulsifier formulation comparison example ■ Emulsifier formulation comparison example ■ Dodecylbenzenesulfonate sodium salt 50 Parts by weight 10 - Comparative example of emulsifier formulation ■ 50'' parts by weight 50 parts by weight Comparative example of emulsifier formulation ■ 50 parts by weight Sodium salt of alkyl sulfate 50 Next, examples of formulations are shown.

Prescription examples for products of the present invention■ Prescription examples for comparative products■ Prescription examples for products of the present invention■ Prescription examples for comparative products■ Prescription examples for products of the present invention■ Prescription examples for comparative products■ Prescription examples for products for the present invention■ Prescription examples for comparative products■ The present invention Product formulation formulation example■ [Diquat (purity 40%) 22 parts by weight 13- Comparative formulation formulation example■ <Test example><Evaluation of presence or absence of aggregate generation> Each formulation was prepared on a 10100O scale, and after preparation 10
00+t/capacity cylinder, and measure the amount of aggregates generated after standing for 24 hours. Note that since the aggregates settled at the bottom of the cylinder, the amount thereof was quantified. The results are shown in Table 1.

<Biological efficacy test> Fishweed weed (20 grains) was sown, and when the plant height was 20 to 30 αL, various formulations were diluted 200 times (14-fold) and sprayed at 101 Ilff per 4 days to compare biological efficacy. The herbicidal power after 2 weeks was determined by measuring the above-ground fresh weight and calculating the herbicidal percentage relative to the Schiff 1 untreated plot. The live weight of the untreated grasshopper was 124v. The results are shown in Table 1.

<Storage Stability Test> Each formulation was placed at 50°C, and after 50 days, the appearance was judged and the contents of paraquat and diquat ingredients were quantified. The results are shown in Table 1.

Claims (1)

[Scope of Claims] 1. An anti-aggregation agent for a mixed preparation of paraquat or diquat and a water-insoluble biocide, which contains an alkyl diphenyl ether sulfonate as an essential component. 2 Claim 1 in which the sulfonate of alkyl diphenyl ether is a compound represented by general formula (1)
Anti-aggregation agent as described in section. (In the formula, R is an alkyl group or alkenyl group having 1 to 22 carbon atoms, MFi alkali metal, alkaline earth metal,
HE or substituted ammonium. )