JPS6041604A - Insecticide composition - Google Patents

Abstract

PURPOSE:To provide an insecticide composition having improved stability to long-term storage, by compounding a composition containing an O,O-dialkylphosphate insecticide component, a hydrocarbon organic solvent and an emulsifier with specific amounts of an epoxy compound and an antioxidant. CONSTITUTION:The objective insecticide composition is produced by compounding (A) an O,O-dialkylphosphoric acid ester insecticide component with (B) a hydrocarbon organic solvent, (C) an emultisier preferably composed of a nonionic surface active agent and a 8-20C alkylbenzenesulfonate, especially aliphatic diamine salt, and mixing the obtained composition with (D) an epoxy compound such as epichlorohydrin and (E) an antioxidant. The amounts of the components D and E are <=3wt% and <=2wt% based on the sum of A-E, respectively, The synergistic effect attained by the combined use of the components D and E prevents the decomposition of said insecticide component in the long-term storage, and the lowering of the emulsion stability of the emulsion prepared from the insecticide composition after the storage for a long period.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a 0,0-dialkyl phosphate insecticide composition that is stable even during long-term storage, more specifically, a 0.0-dialkyl phosphate insecticide component, a hydrocarbon-based Consisting of organic solvent, emulsifier, epoxy compound and antioxidant,
The present invention relates to an insecticide composition that exhibits significantly less decomposition of insecticide components and a decrease in emulsion stability due to oral changes during long-term storage.

Currently, 0.0-dialkyl phosphate organic phosphorus agents, which are insecticide components, are blended with hydrocarbon organic solvents and emulsifiers, and are often used as insecticide compositions. In order to obtain a uniform product with good emulsion/stability, many of these compositions contain a combination of a nonionic surfactant and an alkylpensene sulfonate calcium salt as an emulsifier.

However, during long-term storage, the insecticide composition deteriorates, resulting in a decrease in the effectiveness of the insecticide component, the formation of precipitates, which impairs the uniformity of the product, and furthermore, the insecticide composition is diluted with water. However, when spraying as an emulsion liquid, it is known that the emulsion may cause the coating to become difficult to coat. It is also known that the cause of this is often the presence of calcium alkylbenzenesulfonate in the insecticide composition, and various improved compositions have therefore been proposed.

For example, an example in which an ethylene diamine salt of argylbenzene sulfonic acid is used as an emulsifier in place of argylbenzene sulfonic acid with a nonionic surfactant 1 (1988), alkylbenzene sulfonate Ammonium carbonate is a salt in which the ammonium cation, which is a constituent element of the salt, substitutes a part or all of the hydrogen of ammonium with an alkyl, alkenyl or (tubenzyl group)/This cation is a nonionic y-doface. An example of using active e + - Qi 11 f!= Ju K (Japanese Unexamined Patent Application Publication No. 58-24506), a monoamine or diamine salt having 1 aromatic ring or 2 aromatic rings of -fulgylbenzene sulfonic acid is y, r.

There is an example of using it together with a surfactant (JP-A No. 58-52204).

However, all of these are effective in preventing the decomposition of insecticide components during long-term storage.
a'
Ab L/ko'=Efficacy to prevent the stability of the emulsion liquid from decreasing.

Therefore, currently in this industry, 0. O-sial V luric acid ester insecticide composition (7) Long IJI i'1.
The decomposition of the component D'y, Of course, Iil! l”!
We strongly request the emergence of an insecticide composition that has excellent emulsion stability of iλ17 and emulsion liquid.
).

In view of the above-mentioned current situation, the present inventors conducted intensive research to obtain an improved insecticide composition that could meet the low price of WSMe, and found that a 0.0-sialgyl phosphate-based insecticide component and a hydrocarbon-based organic solvent. and an emulsifier,
They discovered that adding appropriate amounts of an epoxy compound and an antioxidant at the same time achieved the desired purpose.
The invention has been completed (-).

Zunawara present invention d2. Consists of a 0,0-sialgyl phosphate ester insecticide component, a hydrocarbon organic solvent, an emulsifier, an ebogi/compound and an antioxidant, and the combination M'l' iii of Kakko f'l et al. On the other hand, the present invention relates to an insecticide composition in which the epoxy compound is 3 parts by weight or less, and the antioxidant is 2 parts by weight or less.

In the present invention, the 0.0-dialkyl phosphate ester insecticide component includes 0,0-/phthyl 0-(2,2
-dichlorvinyl) phosnoe-1 (hereinafter referred to as D D'V
0,0-dimethyl-〇-(2-inopropyl-4-methyl-6-pyrimidyl)phosphate
1. (hereinafter abbreviated as diazinon), 0.0-dimethyl-0-(3-methyl-4-nitrophenyl)thiophosphate (hereinafter abbreviated as 'F, sumithion), and many other compounds. There is. Examples of hydrocarbon-based organic solvents include petroleum-based hydrocarbons, No. 1 kerosene, aliphatic carbonization of fume and oil, aromatic hydrocarbons such as xylene, methylnaphthalene, ethylhenzene, trinotylbenzene, etc. There is. Furthermore, as an emulsifier, a nonionic surfactant is usually used. alkenyl) ether (abbreviation for P OA Pi borilegi/alkylene), sorbitano fatty acid Nisder J? OE compound, POE higher fatty acid ester, PoE argyl allyl ether ester,
Artechite heavy J compound '1 No 1q is the insecticide composition I
In order to improve the 4'L force, it is preferable to use an alkylbenzene sulfonate (11). Alkaline earth metal salts of gilbense sulfonic acid or aliphatic 7 amines No. 1, more specifically carbon atoms 8
Calcium salts, magnesium salts, 1,2-diaminopropane salts of ~20 argylbenose/sulponic acids, 1.
There are 3-diaminopropane salts, 1,4-diaminobutane salts, etc., but aliphatic diamine salts are particularly preferred.

Epoxy compounds include epichlorohydrin, phenylglycidyl ether, allylglycidyl ether, Yang fatty acid grindyl ester, epoxidized soybean oil, epoxidized linseed oil, epoxidized soybean fatty acid butyl ester, cyclohexene oxide, carbon number 11- 12
α-olefin oxides and the like can be used. In addition, as an antioxidant, 2.6-t-butyl para-cresol (
BHT), butyl parahydroxyanineol (BHAL)
Gallic acid propyl ester and the like can be used, and those having a phenolic hydroxyl group are preferred.

A feature of the present invention is that an epoxy compound and an antioxidant are used together in a composition containing a 0.0-dialkyl phosphate insecticide component, a hydrocarbon organic solvent, and an emulsifier, so that the synergy between the two is The purpose of this method is to prevent the decomposition of insecticide components during long-term storage, and at the same time maintain the emulsion stability of the insecticide composition after long-term storage. Specific effects of the present invention -
For example, when cheap aliphatic hydrocarbons are used as hydrocarbon-based organic solvents, the emulsion stability of the emulsion prepared after long-term storage with conventional insecticide compositions is extremely poor, and in fact long-term storage is impossible. Although it was difficult, the insecticide composition according to the present invention does not have this kind of problem at all.

In the present invention, the amount of the epoxy compound and the antioxidant used is such that the amount of the former is 3 weight or less based on the total amount of the insecticide composition,
The latter is less than or equal to the square magnitude coefficient. The smaller the amount of both used within this range, the less the synergistic effect will be exerted.However, if it exceeds this range, the synergistic effect commensurate with the amount used will not be obtained, and the emulsification of the emulsion liquid will become worse. begins to decline.

EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited thereto.

・Example (and Comparative Example) Each insecticide composition listed in Table 1 was prepared, 20g of each was sealed in a 30ml glass ampoule, stored in a constant temperature room at 50'C for 45 days, and then allowed to cool to room temperature. After cooling, the decomposition rate of the component in the insecticide composition before insecticide and the emulsion stability of the insecticide composition were determined by the following method.

(1) Decomposition rate: Measured with a gas chromatograph and calculated by comparing with that before storage.

(2) Emulsion stability: According to the Ministry of Health, Labor and Welfare's Insecticide Guidelines Emulsion Test Method, the liquid strength of the 5-emulsion of the insecticide composition was measured; the time until two-phase separation occurs (two-hour stability is one guideline). ing).

Table 1 (Contents of insecticide composition) Note: The numbers in the table are based on weight, and the ratios are comparative examples and are actually examples. Contents of emulsifier fishing 1 to A7 I''i are listed in Table 2.

*1=DDVP, *2=,<mithion, *3-diazinon, *4=smog kerosene, *5-k'j-lene, *6=phenylchryzodyl ether, *7=cyclohexene oxide, *8=9 .10-epoxystearyl butyrate,
*9-BI(T, *10-Probil gallate.

Table 2 (Contents of emulsifier) Note: Values in the table are based on weight. *11=POE (average 8 mol) POP (average 2 mol) alkyl (X17 average C number 13)
Table 3 (Results Note) The ratios are comparative examples, but are actually examples.

As is clear from the results in Table 3, the insecticide composition according to the present invention (each example) shows less decomposition of the insecticide component due to changes over time and emulsification of the emulsion liquid compared to each comparative example. It can be seen that the stability is also good.

Patent applicant: Takemoto Yushi Co., Ltd. Agent: Hiroshi Yama, Patent Attorney

Claims (1)

[Scope of Claims] 10. Consists of a 0-dialkyl phosphate insecticide component, a hydrocarbon organic solvent, an emulsifier, an epoxy compound, and an antioxidant, and based on the total amount of these, the amount of the epoxy compound and the oxidized The amount of the inhibitor is less than the former 3 weight ratio,
An insecticide composition having a weight ratio of 2' or less. 2. The insecticide composition according to claim 1, wherein the two emulsifiers comprise a nonionic surfactant and a linear or branched alkylbenzene sulfonate having 8 to 20 carbon atoms. 3. The insecticide composition according to claim 2, wherein the linear or branched alkylbenzenesulfonic acid salt having 8 to 20 carbon atoms is a linear or branched alkylbenzenesulfonic acid/aliphatic diamine salt having 8 to 20 carbon atoms. 4 Epoxy compounds include epichlorohydrin, glycidyl ether compounds, glycidyl ester compounds, epoxidized vegetable oil compounds, epoxidized fatty acid ester compounds, epoxidized cycloaliphatic compounds, epoxidized cycloaliphatic ester compounds, and olefin oxide compounds. The insecticide composition according to any one of claims 1 to 3, which is one or more selected from the following.