JPS6210001A - Foam breaker - Google Patents

Abstract

PURPOSE:To provide a foam breaker containing a specific phosphoric acid derivative as an essential component, and exhibiting excellent effect for breaking or suppressing the foam generated in the dilution of agricultural chemicals. CONSTITUTION:The objective agent contains, as essential component, one or more compounds selected from the compound of formula I (R is 4-28C alkyl or alkenyl; X is alkali metal, alkaline earth metal, ammonium or alkanolamine) and the compound of formula II (e.g. 2-ethylhexylphosphoric acid monoester sodium salt, lauryl-phosphoric acid diester triethanolamine salt, etc.). The above compound can be produced e.g. by reacting an alcohol having 4-28C alkyl, etc., with P2O5, and reacting the resultant phosphoric acid ester with salt of alkali metal (e.g. Na) or alkaline earth metal (e.g. Mg) or monoethanolamine, etc. It is used in the form of emulsion, flowable agent, wettable powder, etc. The concentration of the agent in use is >=0.1ppm, preferably >=0.5ppm.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a foam-breaking agent, and more specifically to a foam-breaking agent that breaks the foam that is generated in large quantities during the dilution preparation of agricultural chemical formulations or when spraying a diluted agricultural chemical formulation. This invention relates to a defoaming agent.

[Conventional technology and its problems]

Conventionally, when spraying pesticide formulations, a large amount of water, i.e. 100
! Spray diluted/ha. Spraying methods vary depending on the area to be treated, but speed players, sprinklers, etc. are used to spread over a wide area, and shoulder spreaders, hand spreaders, etc. are used to spread over a relatively small area. In both cases, large amounts of bubbles are generated. A large amount of air bubbles is generated because various dispersants, emulsifiers, and wetting agents are used in pesticide formulations. occurs. If a large amount of foam is generated during drug preparation, the level of the diluted liquid cannot be confirmed, leading to the wrong dilution amount, resulting in problems such as chemical damage and insufficient control efficacy. There are also problems such as clogging of the sprayer during spraying, and the amount of sprayed water is not constant due to foam, making it impossible to spray uniformly.

For this reason, low-foaming spreading agents have been used to suppress foam and reduce surface tension, but although this reduces the surface tension of the diluted solution and creates a moist layer effect on the plant, it is not effective in suppressing foam. Nothing sufficiently effective has yet been put into practical use.

[Means for solving problems]

As a result of extensive research, the present inventors have found that the specific compound described later has an excellent effect on breaking or suppressing foam generated when diluted with vI of 4 g, regardless of the type of agricultural chemical formulation. This discovery was made and the present invention was completed.

That is, the present invention provides a foam-breaking agent containing as an essential component one or more selected from the group of compounds represented by the following general formulas (Z) and (1N).

>P-OK (I) (In the formula, R represents a linear or branched alkyl or alkenyl group having 4 to 28 carbon atoms, and X represents an alkali metal, alkaline earth metal, ammonium, or alkanolamine.) The compounds according to the invention can be easily obtained by known methods, such as a method in which alcohol is reacted with phosphorus pentoxide. The starting alcohol is an alcohol having a straight or branched alkyl group (or alkenyl group) having 4 to 28 carbon atoms, and may have a hydroxyl group in the alkyl (or alkenyl) chain. Preferably,
It is an alcohol having an alkyl (or alkenyl) group having 6 to 18 carbon atoms. Examples include 2-ethylhexanol, lauryl alcohol, stearyl alcohol, and oleyl alcohol.

There are various methods for phosphorylating alcohol, but for example, 1 mole of phosphorus pentoxide is added to 3 moles of alcohol.
By reacting at ~100°C for about 6 hours, a silicic acid ester of K can be easily obtained. The alkyl phosphate ester obtained in this case is an approximately isocytotic compound of monoester and diester.

Counterions include alkali metals such as K and Ha, M
alkaline earth metals such as g, Oa, ammonium, monoethanolamine, jetanolamine, triethanolamine, etc.

Specific examples of the compounds represented by the general formula (1) or (phantom) of the present invention thus obtained include 2-ethylhexyl phosphate monoester sodium salt, lacryl phosphate monoester potassium salt, lacryl phosphate diester triethanolamine salt, oleyl phosphate monoester magnesium salt, oleyl phosphate diester jetanolamine salt, and the like.

In carrying out the present invention, the foam-breaking agent of the present invention may be used in combination with a conventional low-foam spreading agent, or even if the foam-breaking agent of the present invention is used alone, it exhibits excellent foam-breaking and foam-inhibiting properties. Show effectiveness. That is, the product of the present invention may be formulated in a low-foaming spreading agent. Agrochemical formulation types that exhibit the effect of the foam-breaker of the present invention include emulsions, flowable agents, water-use agents, granular water-use agents, water-solvents, etc., and when these are mixed and used, the effects are similarly shown.

The same applies even if the product of the present invention is formulated into a preparation.

The foam-breaking agent of the present invention is effective at a concentration of 0.1 ppm or more, but it is preferably used at a concentration of 0.5 ppm or more. If the concentration is high, for example 500 ppm or 110
No phytotoxicity to crops was observed even when used at 00pp.

There is no particular limitation on the target biocide for the foam-breaking agent of the present invention.
2-(4-chlorophenyl)-3-methylvalerate), Bithroid (cyano(4-fluoro-3-phenoxyphenyl)methyl-5-(2,2-')chloroethynyl)-Z, Z-dimethyl cyclopropane carboxylate), organophosphorus insecticides such as DDVI) (2,2
-dichlorovinyldimethylphosphate), Sumithion (dimethyl-4-nitro-m-tolyl-phosphorothionate), Marathon (S-(1,2-bis(ethoxycarbonyl)ethyl fudimethylphosphorothiolthionate) , dimethoate (dimethyl 5-(N-methylcarbamoylmethyl) phosphorothiolthionate), elsane (S-(α-(ethoxycarbonyl)benzylcodimethylphosphorothiolthionate), bisit (0,
O-dimethyl-o-(5-methyl-4-methylmercaptophenylthiophosphate)), carbamate insecticides include Bassa (0-butylphenylmethylcarbamate), MTMC (m-tolylmethylcarpamate)
), meopal (S, a-dimethylphenyl-N-methylcarbamate)), NAO (1-su7thyl-N-methyl-carbamate), and also methomyl (methyl-N[(methylcarbamoyl)oxy]thioacetoid ξ) ), cartap (1゜3-bis(carbamoylthio)-2-(N
, N-dimethylamino)propane hydrochloride).

For example, in the case of acaricides, Sumite (z-(2-p-t
ert-butylphenoxy)isopropoxy]inglovir-2-chloroethyl sulfide), acrizid (2,4-dinitro-6-secondary-butylphenyldimethylacryleate), chlormite (inglovir-4゜4-dichloropendyleate) , Akar (ethyl-4,4-cyclopendyleate), Kelsen (
1,1~bis(p-chlorophenyl) -2゜2.2~
trichloroethanol), citrazine (ethyl-〇-benzoyl-5-chloro-2,6-simethoxybenzohydroxymate), brictran (tricyclohexyltin hydroxide), omite (2-(p-te
rt-butylphenoxy)-cyclohexyl-2-propynylsulfite), and the like.

For example, in the case of fungicides, organic sulfur-based fungicides include Daisen (zinc ethylene bisdithiocar/<mate),
Maneb (manganese ethylene bisdithiocarbamate)
, thiuram (bis(dimethylthiocarbamoyl) dioxide), other nipenleate (methyl-1-(butylcarbamoyl)-2-penzimidazole carhameate), difortan (N-tetrachloroethylthio-4-
cyclohexane-1,2-dicarboximide), Daconyl (tetrachloroiso7talonitriy/L/), /
(Nsoyl(5-ethoxy-5-trichloromethyl-1
, 2,4-+7 diazole), thiophanate methyl (
L2-bis(3-methoxycarbonyl-2-thiofreido)benzene), labside (4,5,6,7-titrachlor 7-talloid), Kitazine P (0,0-diisogloby-S-benzylphosphorothioate), hinozan (〇- Examples include ethyl-8.S-diphenyl dithiophosphate), globenazole (3-7 lyloxy 1,2-benzothiazole-1,1-dioxide), and the like.

For example, in the case of herbicides, Stam (3,4-dichloroglobionanilide), Saturn (S-(4-chlorobenzyl)-N,N-diethylthiol carbamate), and Lasso (2-chloro-2').

6'-diethyl-N-(methoxymethyl)acetanilide), glyphocet (N-(phosphonomethyl)glycine isoglobylamine salt), DOMTICs -(3,
4-dichlorophenyl)-1゜1-dimethylurea),
Examples include gramoxone (1,1'-dimethyl-4,4'-dipyridium dichloride).

For example, in the case of a plant growth regulator, MH (maleic acid hydrazide), ethrel (2-chloroethylphosphonic acid), etc. may be mentioned.

〔Example〕

Next, the present invention will be explained with reference to examples, but the present invention is not limited to these examples.Example 1 Commercially available herbicide Carmex water conservancy, paraquat solution,
Roundup liquid commercially available fungicide Topsyn M hydrating agent, Dyer irrigation agent, Ortran irrigation agent Commercially available insecticides Sumithion irrigation agent, Bassa emulsion of the present invention at 0.1 ppm, 1 ppm, 1
0 ppm diluent is used to dilute to the conventional concentration, and the diluted solution is 10,100 O at 4 J per minute. After discharging and circulating for 10 minutes from the liquid level 50- using a protruding gear pump, the height of the bubbles was measured over time.

The results are shown in Table 12 and Table 2. The height of the bubble was measured in centimeters from the liquid surface to its tip.

Table 11 Compounds used as the invention products in Table 2 ■, ■,
■ is the following passage.

■ 2-ethylhexyl phosphate monoester sodium salt ■ Lauryl phosphate diester triethanolamine salt ■ Oleyl phosphate monoester i magnesium salt Commercially available low foaming spreading agent A; Alkylaryl alkylene oxide adduct

Claims (1)

[Claims] 1. A foam-breaking agent containing one or more compounds selected from the group of compounds represented by the following general formulas (I) and (II) as an essential component. ▲There are mathematical formulas, chemical formulas, tables, etc.▼(I) ▲There are mathematical formulas, chemical formulas, tables, etc.▼(II) (In the formula, R represents a straight chain or branched alkyl or alkenyl group having 4 to 28 carbon atoms, X represents an alkali metal, alkaline earth metal, ammonium, or alkanolamine.)