Flight control additive containing modified vegetable oil as well as preparation method and application thereof

Abstract

The invention relates to the technical field of pesticide adjuvants, in particular to a flight control additive containing modified vegetable oil as well as a preparation method and application of the flight control additive. According to the novel plant protection flight control auxiliary agent and the preparation method thereof, the plant oil is modified to directly prepare the plant oil containing an ethylene oxide branch chain, so that the plant oil has the function of a nonionic surfactant, the use of the nonionic surfactant is reduced, and the plant protection flight control auxiliary agent has a good application prospect when being applied to a pesticide test. The wetting property, the evaporation resistance and the rain wash resistance are good, the whole process is easy to operate, the condition is mild, and the method is suitable for large-scale industrial production.

Description

Technical Field

[0001] The invention relates to the technical field of pesticide adjuvants, and in particular to an aerial spraying adjuvant containing modified vegetable oil, and a preparation method and application thereof. Background Art

[0002] With the advancement of science and technology, aerial spraying of plant protection is becoming more and more popular. The application of aerial spraying technology can greatly save time and economic costs while achieving the same management purpose. Unlike manual operations, when the pesticide needs to be diluted 3000-5000 times and the water consumption per mu is 30-50L, the dilution multiple for drone aerial spraying is 30-100 times and the water consumption is 0.5-1L. Low dilution number operations put forward higher requirements on the mixing properties of different pesticides, the wettability, permeability, drift resistance, and transpiration resistance of the pesticide. In order to ensure that the pesticide can be evenly sprayed on the crop leaves and maximize the attachment of effective droplets, the use of aerial spraying adjuvants is essential.

[0003] There are three types of adjuvants for flying pest control on the market: mineral oil, silicone and plant oil. The raw materials of plant oil come completely from plants themselves, and have very good affinity with plant leaves, which reduces the contact angle between the droplets and the leaf surface and expands the coverage area of ​​the droplets on the leaf surface. Good wettability increases the amount of liquid medicine attached to plant leaves, increases the amount of medicine applied per leaf, increases the efficacy, reduces costs, and can achieve the effect of reducing the amount and increasing the efficacy. The efficacy is stable, and it is environmentally friendly. It can be synthesized by plants and soil microorganisms, which is beneficial to protecting the environment.

[0004] In the existing field of fly ash control adjuvants, the raw materials of modified vegetable oil usually require the addition of non-ionic surfactants, which increases costs and operation steps. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, one purpose of the present invention is to provide a new type of plant protection aerial spraying adjuvant and a preparation method thereof, modify the vegetable oil, directly prepare the vegetable oil containing ethylene oxide side chains, make it have the function of non-ionic surfactant, reduce the use of non-ionic surfactant, apply the plant protection aerial spraying adjuvant to pesticide test, wettability, anti-evaporation and rain erosion resistance are good, the whole process is simple to operate, the conditions are mild, and it is suitable for large-scale industrial production.

[0006] To this end, the first aspect of the present invention provides a flying control auxiliary agent. According to an embodiment of the present invention, the flying control auxiliary agent comprises:

[0007] Modified vegetable oil,

[0008] Wherein, the modified vegetable oil contains ethylene oxide side chains.

[0009] The inventors have developed a new type of modified vegetable oil anti-flying agent, which modifies the vegetable oil to directly prepare the vegetable oil containing ethylene oxide side chains, and has the performance of a non-ionic surfactant, without the need to add other non-ionic surfactants. The anti-flying agent prepared with the new modified vegetable oil has good spreading, anti-drift, anti-evaporation and other properties.

[0010] In some embodiments of the present invention, the modified vegetable oil is obtained by the following method:

[0011] S1: performing epoxidation reaction on vegetable oil using an oxidant to obtain epoxidized vegetable oil;

[0012] S2: performing a ring-opening reaction on the epoxidized vegetable oil to obtain a hydroxylated vegetable oil;

[0013] S3: using ethylene oxide to polymerize the hydroxylated vegetable oil to obtain the modified vegetable oil.

[0014] In some embodiments of the present invention, in step S3, the mass ratio of the hydroxylated vegetable oil to the ethylene oxide is 1:(1.8-2.2). Thus, the emulsification performance of the modified vegetable oil can be improved.

[0015] In some embodiments of the present invention, the polymerization reaction occurs under basic conditions.

[0016] In some embodiments of the present invention, the polymerization reaction temperature is 100-110° C., and the reaction time is 12-18 hours. Thus, a modified vegetable oil with excellent emulsification properties can be obtained.

[0017] In some embodiments of the present invention, in step S1, the oxidant is hydrogen peroxide.

[0018] In some embodiments of the present invention, the epoxidation reaction utilizes an inorganic acid and / or an organic acid as a catalyst.

[0019] In some embodiments of the present invention, the inorganic acid comprises sulfuric acid and / or hydrochloric acid.

[0020] In some embodiments of the present invention, the organic acid comprises at least one of formic acid, acetic acid, and p-toluenesulfonic acid.

[0021] In some embodiments of the present invention, when the epoxidation reaction is carried out, the molar ratio of the inorganic acid and / or organic acid, the unsaturated double bonds in the vegetable oil and the oxidant is (0.5-0.6): (1.0-1.1): (2.0-2.2). As a result, the double bonds in the vegetable oil can be fully epoxidized, but will not be over-oxidized to aldehydes or ketones to generate other by-products.

[0022] In some embodiments of the present invention, in step S1, the epoxidation reaction temperature is 65-70° C. and the reaction time is 6.0-8.0 hours. Thus, the epoxidation of vegetable oil can be achieved to obtain epoxidized vegetable oil.

[0023] In some preferred embodiments of the present invention, the vegetable oil is heated to 40-45° C. for 0.5-1.0 h before the epoxidation reaction. Heating the vegetable oil before the epoxidation reaction and initiating it slowly are more conducive to the occurrence of the epoxidation reaction, because direct heating to the reaction temperature may cause the oxidant (such as hydrogen peroxide) to decompose.

[0024] In some embodiments of the present invention, step S2 further comprises:

[0025] The epoxidized vegetable oil is subjected to a ring-opening reaction under the condition of an acidic catalyst.

[0026] In some embodiments of the present invention, the acidic catalyst comprises an inorganic acid and / or an organic acid.

[0027] In some embodiments of the present invention, the inorganic acid comprises sulfuric acid and / or hydrochloric acid.

[0028] In some embodiments of the present invention, the organic acid comprises at least one of formic acid, acetic acid, and p-toluenesulfonic acid.

[0029] In some embodiments of the present invention, the working concentration of the catalyst is 20-40 wt%.

[0030] In some embodiments of the present invention, the reaction temperature of the ring-opening reaction is 100-110°C.

[0031] In some embodiments of the present invention, the reaction time of the ring-opening reaction is determined according to the peroxide value of the epoxidized vegetable oil.

[0032] In some embodiments of the present invention, the vegetable oil includes at least one selected from peanut oil, corn oil, soybean oil, sesame oil, rapeseed oil, linseed oil, castor oil, and cottonseed oil.

[0033] In some embodiments of the present invention, the fly control adjuvant further includes an emulsifier, a wetting agent and a spreader.

[0034] In some embodiments of the present invention, the emulsifier is an anionic surfactant.

[0035] In some embodiments of the present invention, the emulsifier includes at least one selected from the group consisting of ammonium fatty alcohol polyoxyethylene ether sulfate, disodium lauryl alcohol polyoxyethylene ether sulfosuccinate, sodium isooctyl sulfate, sodium n-decyl sulfate, sodium methyl isobutyl methyl sulfosuccinate, and sodium dialkyl succinate sulfonates.

[0036] In some embodiments of the present invention, the emulsifier is selected from at least one of ammonium lauryl alcohol polyoxyethylene ether sulfate, disodium lauryl alcohol polyoxyethylene ether sulfosuccinate, and sodium methyl isobutyl methyl sulfosuccinate.

[0037] In some embodiments of the present invention, the wetting agent includes at least one selected from sodium dioctyl sulfosuccinate, sodium tridecyl sulfosuccinate, sodium dodecyl sulfonate, calcium dodecyl sulfonate, naphthalene sulfonate and its derivatives, and alkyl naphthalene sulfonate condensates.

[0038] In some embodiments of the present invention, the wetting agent is selected from at least one of sodium dioctyl sulfosuccinate, sodium dodecyl sulfonate, and sodium dibutylnaphthalene sulfonate.

[0039] In some embodiments of the present invention, the spreader comprises an acrylic resin and / or an acrylic polymer.

[0040] In some embodiments of the present invention, the fly control adjuvant further comprises a thickener.

[0041] In some embodiments of the present invention, the thickener includes at least one selected from the group consisting of tallow amine, xanthan gum, and guar gum.

[0042] In some embodiments of the present invention, the fly control adjuvant comprises:

[0043] 30-90 parts by weight of modified vegetable oil;

[0044] 5-35 parts by weight of an emulsifier;

[0045] 5-30 parts by weight of a wetting agent;

[0046] 1-10 parts by weight of a spreader; and

[0047] 1-3 parts by weight of thickener.

[0048] In some embodiments of the present invention, the fly control adjuvant comprises:

[0049] 50-80 parts by weight of modified vegetable oil;

[0050] 10-25 parts by weight of an emulsifier;

[0051] 8-25 parts by weight of a wetting agent;

[0052] 4-10 parts by weight of a spreader; and

[0053] 1-2 parts by weight of thickener.

[0054] The second aspect of the present invention provides a method for preparing the flying control adjuvant described in the first aspect. In some embodiments of the present invention, the preparation method comprises:

[0055] The modified vegetable oil, emulsifier, wetting agent, spreader, thickener and water are mixed to obtain the fly control auxiliary agent.

[0056] In some embodiments of the present invention, the temperature during the mixing is 40-60° C. and the time is at least 0.5 h.

[0057] The third aspect of the present invention provides use of the aerial pest control adjuvant described in the first aspect in preparing a pesticide composition.

[0058] The fourth aspect of the present invention provides a pesticide composition. In some embodiments of the present invention, the pesticide composition includes the flying pest control adjuvant described in the first aspect.

[0059] The present invention develops a novel plant protection aerial spraying adjuvant and a preparation method thereof. The plant oil is modified to have the function of a nonionic surfactant, thereby reducing the use of the nonionic surfactant. The plant protection aerial spraying adjuvant is applied to pesticide tests, and the wettability, anti-evaporation and rainwater erosion resistance are all good. The entire process is simple to operate, the conditions are mild, and it is suitable for large-scale industrial production.

[0060] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. DETAILED DESCRIPTION

[0061] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0062] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Further, in the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0063] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0064] In order to make the present invention more easily understood, certain technical and scientific terms are specifically defined below. Unless otherwise clearly defined elsewhere in this document, all other technical and scientific terms used herein have the meanings commonly understood by those skilled in the art to which the present invention belongs.

[0065] In this document, the terms “include” or “comprising” are open expressions, that is, including the contents specified in the present invention but not excluding other contents.

[0066] As used herein, the terms "optionally", "optional" or "optionally" generally mean that the subsequently described event or circumstance may but need not occur, and that the description includes instances where the event or circumstance occurs and instances where it does not.

[0067] According to a specific embodiment of the present invention, the present invention provides a flying control auxiliary agent, comprising:

[0068] Modified vegetable oil,

[0069] Wherein, the modified vegetable oil contains ethylene oxide side chains.

[0070] According to a specific embodiment of the present invention, the modified vegetable oil is obtained by the following method:

[0071] S1: performing epoxidation reaction on vegetable oil using an oxidant to obtain epoxidized vegetable oil;

[0072] S2: performing a ring-opening reaction on the epoxidized vegetable oil to obtain a hydroxylated vegetable oil;

[0073] S3: using ethylene oxide to polymerize the hydroxylated vegetable oil to obtain the modified vegetable oil.

[0074] According to a specific embodiment of the present invention, in step S3, the mass ratio of the hydroxylated vegetable oil to the ethylene oxide is 1:(1.8-2.2). In the present invention, the mass ratio of the hydroxylated vegetable oil to the ethylene oxide can be 1:1.8, 1:2, 1:2.2, etc.

[0075] It should be noted that sodium hydroxide or potassium hydroxide, or other alkaline reagents may be added to the reaction system to cause the reactants to undergo a polymerization reaction.

[0076] According to a specific embodiment of the present invention, the reaction temperature of the polymerization reaction is 100-110°C, and the reaction time is 12-18h. For example, the reaction temperature of the polymerization reaction is 100°C, 101°C, 102°C, 103°C, 104°C, 105°C, 106°C, 107°C, 108°C, 109°C, 110°C, etc., and the reaction time is 12h, 13h, 14h, 15h, 16h, 17h, 18h, etc.

[0077] According to a specific embodiment of the present invention, in step S1, the oxidant includes but is not limited to hydrogen peroxide, and may also be any oxidant known in the art that can perform epoxidation reaction on vegetable oil, all of which are covered within the protection scope of the present invention.

[0078] According to a specific embodiment of the present invention, the epoxidation reaction uses an inorganic acid and / or an organic acid as a catalyst. The inorganic acid includes but is not limited to sulfuric acid and hydrochloric acid; the organic acid includes but is not limited to formic acid, acetic acid, and p-toluenesulfonic acid.

[0079] According to a specific embodiment of the present invention, when the epoxidation reaction is carried out, the molar ratio of the inorganic acid and / or organic acid, the unsaturated double bonds in the vegetable oil and the oxidant is (0.5-0.6): (1.0-1.1): (2.0-2.2). According to a specific embodiment of the present invention, when the epoxidation reaction is carried out, the molar ratio of the inorganic acid and / or organic acid, the unsaturated double bonds in the vegetable oil and the oxidant is 0.5:1.0:2.0, 0.5:1.0:2.2, 0.5:1.1:2.0, 0.5:1.1:2.2, 0.6:1.0:2.0, 0.6:1.0:2.2, 0.6:1.1:2.0, 0.6:1.1:2.2, etc. According to a specific embodiment of the present invention, in step S1, the epoxidation reaction temperature is 65-70°C and the reaction time is 6.0-8.0h. For example, in step S1, the epoxidation reaction temperature can be 65°C, 66°C, 67°C, 68°C, 69°C, 70°C, etc., and the reaction time can be 6.0h, 6.5h, 7.0h, 7.5h, 8.0h, etc.

[0080] In a preferred embodiment, before the epoxidation reaction, the vegetable oil is heated to 40-45°C for 0.5-1.0 h. For example, before the epoxidation reaction, the vegetable oil is heated to 40°C, which is more conducive to the slow initiation and occurrence of the epoxidation reaction.

[0081] According to a specific embodiment of the present invention, step S2 further comprises:

[0082] The epoxidized vegetable oil is subjected to a ring-opening reaction under the condition of an acidic catalyst.

[0083] The acidic catalyst includes an inorganic acid and / or an organic acid. The inorganic acid includes sulfuric acid and / or hydrochloric acid; the organic acid includes at least one of formic acid, acetic acid, and p-toluenesulfonic acid.

[0084] According to a specific embodiment of the present invention, the working concentration of the catalyst is 20-40 wt%.

[0085] According to a specific embodiment of the present invention, the reaction temperature of the ring-opening reaction is 100-110° C. For example, the reaction temperature of the ring-opening reaction is 100° C., 101° C., 102° C., 103° C., 104° C., 105° C., 106° C., 107° C., 108° C., 109° C., 110° C., etc.

[0086] According to a specific embodiment of the present invention, the reaction time of the ring-opening reaction is determined according to the peroxide value of the epoxidized vegetable oil. Specifically, when the peroxide value of the epoxidized vegetable oil is 0, the ring-opening reaction ends.

[0087] According to a specific embodiment of the present invention, the vegetable oil includes but is not limited to peanut oil, corn oil, soybean oil, sesame oil, rapeseed oil, linseed oil, castor oil, cottonseed oil, etc. It can also be other types of vegetable oils known in the art, all of which are covered within the protection scope of the present invention, and all modified vegetable oils can be obtained by the preparation method of the present invention.

[0088] According to a specific embodiment of the present invention, the flying control auxiliary agent further includes an emulsifier, a wetting agent and a spreading agent. According to a specific embodiment of the present invention, the emulsifier is an anionic surfactant. According to a specific embodiment of the present invention, the emulsifier includes but is not limited to fatty alcohol polyoxyethylene ether ammonium sulfate, dodecanol polyoxyethylene ether disodium sulfosuccinate, isooctyl sodium sulfate, n-decyl sodium sulfate, methyl isobutyl methyl sulfosuccinate sodium, dialkyl sodium sulfosuccinate, etc. It can also be any other emulsifier commonly used in the art, all of which are covered within the scope of protection of the present invention.

[0089] According to a preferred embodiment of the present invention, the emulsifier is selected from at least one of ammonium lauryl alcohol polyoxyethylene ether sulfate, disodium lauryl alcohol polyoxyethylene ether sulfosuccinate, and sodium methyl isobutyl methyl sulfosuccinate.

[0090] According to a specific embodiment of the present invention, the wetting agent includes but is not limited to sodium dioctyl sulfosuccinate, sodium tridecyl sulfosuccinate, sodium dodecyl sulfonate, calcium dodecyl sulfonate, naphthalene sulfonate and its derivatives, and alkyl naphthalene sulfonate condensates. It can also be any other wetting agent commonly used in the art, all of which are covered within the scope of protection of the present invention.

[0091] According to a preferred embodiment of the present invention, the wetting agent is selected from at least one of sodium diisooctyl sulfosuccinate, sodium dodecyl sulfonate, and sodium dibutylnaphthalene sulfonate.

[0092] According to a specific embodiment of the present invention, the spreader includes acrylic resin and / or acrylic polymer.

[0093] According to a specific embodiment of the present invention, the flying control auxiliary agent further includes a thickener.

[0094] According to a specific embodiment of the present invention, the thickener includes but is not limited to tallow amine, xanthan gum, guar gum, etc. It can also be any other thickener commonly used in the art, all of which are covered within the protection scope of the present invention.

[0095] According to a specific embodiment of the present invention, the flying control auxiliary agent comprises:

[0096] 30-90 parts by weight of modified vegetable oil;

[0097] 5-35 parts by weight of an emulsifier;

[0098] 5-30 parts by weight of a wetting agent;

[0099] 1-10 parts by weight of a spreader; and

[0100] 1-3 parts by weight of thickener. The anti-flying agent also includes water, and the amount of water can be adjusted as needed.

[0101] According to a specific embodiment of the present invention, the flying control auxiliary agent comprises:

[0102] 50-80 parts by weight of modified vegetable oil;

[0103] 10-25 parts by weight of an emulsifier;

[0104] 8-25 parts by weight of a wetting agent;

[0105] 4-10 parts by weight of a spreader; and

[0106] 1-2 parts by weight of thickener. The anti-flying agent also includes water, and the amount of water can be adjusted as needed.

[0107] According to a preferred embodiment of the present invention, the flying control auxiliary agent comprises:

[0108] 50-75 parts by weight of modified vegetable oil;

[0109] 10-25 parts by weight of an emulsifier;

[0110] 10-25 parts by weight of a wetting agent;

[0111] 4-10 parts by weight of a spreader; and

[0112] 1-2 parts by weight of thickener.

[0113] The present invention also provides a method for preparing the aforementioned flying control auxiliary agent, comprising:

[0114] The modified vegetable oil, emulsifier, wetting agent, spreader, thickener and water are mixed to obtain the fly control auxiliary agent.

[0115] According to a specific embodiment of the present invention, the temperature during the mixing is 40-60° C., and the time is at least 0.5 h.

[0116] According to a specific embodiment of the present invention, the flying control auxiliary agent is obtained by the following method:

[0117] (1) Select commercially available vegetable oil, epoxidize it with hydrogen peroxide, then ring-open it to obtain hydroxylated vegetable oil, and finally polymerize it with ethylene oxide to obtain modified vegetable oil;

[0118] (2) The modified vegetable oil, emulsifier, wetting agent, spreader, thickener, etc. are mixed, an equal amount of water (w / w) is added, and the mixture is stirred evenly to obtain a fly control agent.

[0119] The inventors tested the obtained flying control auxiliary agent mixed with active ingredients to detect the effect of the flying control auxiliary agent.

[0120] The flying pest control adjuvant provided by the invention can be used for preparing a pesticide composition.

[0121] It should be noted that the "equal amount" in the present invention refers to the emulsifier, wetting agent, spreader, thickener and modified vegetable oil mixed and diluted with water once.

[0122] The scheme of the present disclosure will be explained below in conjunction with the examples. Those skilled in the art will appreciate that the following examples are only used to illustrate the present disclosure and should not be considered to limit the scope of the present disclosure. Where specific techniques or conditions are not indicated in the examples, the techniques or conditions described in the literature in this area or the product instructions are used. Where the manufacturers of reagents or instruments are not indicated, they are all conventional products that can be obtained commercially.

[0123] Example 1 Preparation of modified vegetable oil

[0124] Step 1: Epoxidation

[0125] 200g soybean oil was added to a three-necked flask, and a separatory funnel containing a small amount of concentrated sulfuric acid and glacial acetic acid was inserted into one end, and the mixture was slowly added during stirring. After the addition was completed, the rapeseed oil was heated to 40°C, and 30% hydrogen peroxide was slowly added dropwise during stirring, and the addition was completed within 1h. The molar ratio of acetic acid, double bond and hydrogen peroxide was 0.5:1:2, and the amount of catalyst was 15wt%. The oil temperature was then raised to 65°C and the reaction was continued for 6h. After the reaction was completed, the reactant was placed in a separatory funnel and allowed to stand, and the aqueous phase in the reactant was poured out after the standing was completed. Wash with warm sodium hydroxide solution, and then wash with warm distilled water until neutral. The reactant washed to neutral was then placed in a vacuum rotary evaporator, rotary evaporated at 80°C for 1h, and dried with anhydrous sodium sulfate after the rotary evaporation was completed. Epoxidized vegetable oil was obtained.

[0126] Step 2: Ring-opening reaction

[0127] The epoxidized soybean oil after the first step of the reaction is added to a three-necked flask, and one end is inserted into a three-necked flask containing a small amount of concentrated sulfuric acid and organic acid, and slowly added during stirring. The catalyst working concentration is 30wt%. After the addition is completed, the oil temperature rises to 110°C and the reaction begins. The peroxide value is monitored during the reaction. When the peroxide value is 0, the reaction is characterized to be complete. After the reaction is completed, the reactant is washed with warm sodium hydroxide solution and then washed with warm distilled water until neutral. The reaction product washed to neutral is rotary evaporated at 80°C for 1h on a vacuum rotary evaporator and dried with anhydrous sodium sulfate. Hydroxylated soybean oil is obtained.

[0128] Step 3: Polymerization

[0129] Add hydroxy soybean oil to the reactor, add 0.5% (w / w) saturated KOH aqueous solution, stir evenly, heat to 110°C, concentrate for 3 hours, pass 2 times (w / w) amount of ethylene oxide, keep warm and react until the pressure in the reactor remains unchanged, the reaction time is 16 hours, vacuum remove residual ethylene oxide, add 1M hydrochloric acid dropwise to adjust the pH to neutral, and collect the modified soybean oil.

[0130] Example 2

[0131] The first and second step reaction steps and conditions in this embodiment are the same as those in Example 1, except that the third step polymerization reaction is as follows:

[0132] Add hydroxy soybean oil to a reactor, add 0.5% (w / w) saturated KOH aqueous solution, stir evenly, heat to 100°C, concentrate for 3 hours, pass 1.8 times (w / w) amount of ethylene oxide, keep warm and react until the pressure in the reactor remains unchanged, the reaction time is 16 hours, vacuum remove residual ethylene oxide, add 1M hydrochloric acid dropwise to adjust the pH to neutral, and collect the modified soybean oil.

[0133] Example 3

[0134] The first and second step reaction steps and conditions in this embodiment are the same as those in Example 1, except that the third step polymerization reaction is as follows:

[0135] Add hydroxy soybean oil to a reactor, add 0.5% (w / w) saturated KOH aqueous solution, stir evenly, heat to 110°C, concentrate for 3 hours, pass 2.2 times (w / w) amount of ethylene oxide, keep warm and react until the pressure in the reactor remains unchanged, the reaction time is 16 hours, vacuum remove residual ethylene oxide, add 1M hydrochloric acid dropwise to adjust the pH to neutral, and collect the modified soybean oil.

[0136] Embodiment 4 Preparation of flying control auxiliary agent

[0137] Preparation of additives

[0138] Emulsifier, wetting agent, spreading agent, thickener, water and modified vegetable oil were added to the reactor, heated to 50°C and stirred for 2 hours, then cooled to 20-30°C and collected. The inventors set up 14 groups of auxiliary agents, and the following Table 1 shows the formula of each raw material.

[0139] Table 1:

[0140]

[0141]

[0142] Note: (1) The “%” in Table 1 above refers to mass concentration;

[0143] (2) Except for the modified soybean oil in Table 1, the other modified vegetable oils were prepared according to the preparation process of Example 1;

[0144] (3) "Water equivalent" in Table 1 means that the emulsifier, wetting agent, spreader, thickener and modified vegetable oil are diluted once with water;

[0145] (4) The modified soybean oil in Group 1 was obtained according to the method of Example 1; the modified soybean oil in Group 11 was obtained according to the method of Example 2; and the modified soybean oil in Groups 12-14 was obtained according to the method of Example 3.

[0146] Example 5: Test of performance of additives

[0147] Preparation of drug solution

[0148] After 70% pymetrozine wettable powder was diluted 3000 times with water, 1% of the adjuvant was added, and the pymetrozine solution without any surfactant was used as a blank solution control.

[0149] 1. Wettability test

[0150] The lying drop method was used, the test temperature was set to 25°C, the static contact angle measurement mode was selected, and rice leaves were placed on the operating table of the contact angle analyzer (DSA100) as the measurement substrate (rice variety: Qingjiao 307). During the test, the flying spray liquid was injected into the dropper, and after the instrument was stable, the operating software controlled the droplet to fall, and the corresponding contact angle value was recorded. The volume of the titration liquid was set to 5ul each time, and each group of tests was repeated 3 times to take the average value.

[0151] After 70% pymetrozine wettable powder was diluted 3000 times with water, 1% of adjuvant was added, and the pymetrozine solution without any surfactant was used as a blank solution control. The contact angle of each group of solutions was measured using a DSA100 contact angle analyzer.

[0152] 2. Evaporation performance test

[0153] Use a 0.1-2.5μl pipette to accurately draw 1.0μl of the drug solution, and drop it vertically on the rice leaves without initial velocity. Start timing when the droplet completely leaves the pipette tip and stop timing when the droplet is completely evaporated. Record the time required for the droplet to completely evaporate under 25°C and 70% relative humidity. Repeat each group of experiments 3 times and take the average value as the evaporation time.

[0154] 3. Rainwater erosion resistance test

[0155] Test method: Use potter spray tower to spray potted loofah seedlings evenly. One hour after application, use 1mm aperture sprinkler to simulate 30min, 60min, and 120min rainfall on the potted loofah seedlings after application. After the simulated rainfall, use 5-point sampling method to cut equal amount of plant stems and leaves, and use pesticide residue detector to analyze the pesticide residue of weed plants. The rain wash resistance of adjuvant to the agent can be obtained.

[0156] Table 2 below shows the wettability test, evaporation performance test and rainwater wash resistance test results of pymetrozine solutions prepared by mixing 14 groups of adjuvants (adjuvant 1 to adjuvant 14) prepared in Example 4 with pymetrozine wettable powder.

[0157] Table 2:

[0158]

[0159]

[0160] The results in Table 2 above show that (1) adding the modified vegetable oil-containing flying pest control adjuvant of the present invention can significantly reduce the contact angle of the liquid medicine and improve the wettability of the liquid medicine; (2) after adding the modified vegetable oil-containing flying pest control adjuvant of the present invention, the evaporation time of the liquid medicine is significantly increased, the rainwater washing resistance is enhanced, and the efficacy time of the liquid medicine is significantly increased.

[0161] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", "some implementation schemes" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0162] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A flying control auxiliary agent, characterized in that include: Modified vegetable oil, Wherein, the modified vegetable oil contains ethylene oxide side chains.

2. The flying control auxiliary agent according to claim 1, characterized in that The modified vegetable oil is obtained by the following method: S1: performing epoxidation reaction on vegetable oil using an oxidant to obtain epoxidized vegetable oil; S2: performing a ring-opening reaction on the epoxidized vegetable oil to obtain a hydroxylated vegetable oil; S3: using ethylene oxide to polymerize the hydroxylated vegetable oil to obtain the modified vegetable oil.

3. The flying control auxiliary agent according to claim 2, characterized in that In step S3, the mass ratio of the hydroxylated vegetable oil to the ethylene oxide is 1:(1.8-2.2); Optionally, the polymerization reaction occurs under alkaline conditions; Optionally, the reaction temperature of the polymerization reaction is 100-110° C., and the reaction time is 12-18 h.

4. The flying control auxiliary agent according to claim 2, characterized in that In step S1, the oxidant is hydrogen peroxide; Optionally, the epoxidation reaction utilizes an inorganic acid and / or an organic acid as a catalyst; Optionally, the inorganic acid comprises sulfuric acid and / or hydrochloric acid; Optionally, the organic acid includes at least one of formic acid, acetic acid, and p-toluenesulfonic acid.

5. The flying control auxiliary agent according to claim 4, characterized in that When the epoxidation reaction is carried out, the molar ratio of the inorganic acid and / or organic acid, the unsaturated double bonds in the vegetable oil and the oxidant is (0.5-0.6): (1.0-1.1): (2.0-2.2); In step S1, the epoxidation reaction temperature is 65-70°C, and the reaction time is 6.0-8.0h; Optionally, before the epoxidation reaction, the vegetable oil is heated to 40-45° C. for 0.5-1.0 h; Optionally, step S2 further comprises: Under the condition of an acidic catalyst, the epoxidized vegetable oil is subjected to a ring-opening reaction; Optionally, the acidic catalyst comprises an inorganic acid and / or an organic acid; Optionally, the inorganic acid comprises sulfuric acid and / or hydrochloric acid; Optionally, the organic acid includes at least one of formic acid, acetic acid, and p-toluenesulfonic acid; Optionally, the working concentration of the catalyst is 0.2-0.4wt%; Optionally, the reaction temperature of the ring-opening reaction is 100-110°C; Optionally, the reaction time of the ring-opening reaction is determined according to the peroxide value of the epoxidized vegetable oil.

6. The flying control auxiliary agent according to claim 2, characterized in that The vegetable oil comprises at least one selected from peanut oil, corn oil, soybean oil, sesame oil, rapeseed oil, linseed oil, castor oil, and cottonseed oil; Optionally, the fly control auxiliary agent further includes an emulsifier, a wetting agent and a spreader; Optionally, the emulsifier is an anionic surfactant; Optionally, the emulsifier includes at least one selected from the group consisting of fatty alcohol polyoxyethylene ether ammonium sulfate, lauryl alcohol polyoxyethylene ether sulfosuccinate disodium, isooctyl sodium sulfate, n-decyl sodium sulfate, methyl isobutyl methyl sulfosuccinate sodium, and dialkyl sodium sulfosuccinate; Optionally, the emulsifier is selected from at least one of ammonium lauryl alcohol polyoxyethylene ether sulfate, disodium lauryl alcohol polyoxyethylene ether sulfosuccinate, and sodium methyl isobutyl methyl sulfosuccinate; Optionally, the wetting agent includes at least one selected from sodium dioctyl sulfosuccinate, sodium tridecyl sulfosuccinate, sodium dodecyl sulfonate, calcium dodecyl sulfonate, naphthalene sulfonate and its derivatives, and alkyl naphthalene sulfonate condensates; Optionally, the wetting agent is selected from at least one of sodium dioctyl sulfosuccinate, sodium dodecyl sulfonate, and sodium dibutylnaphthalene sulfonate; Optionally, the spreading agent comprises acrylic resin and / or acrylic polymer; Optionally, the fly control aid further comprises a thickener, Optionally, the thickener includes at least one selected from the group consisting of tallow amine, xanthan gum, and guar gum; Optionally, the flying control auxiliary agent includes: 30-90 parts by weight of modified vegetable oil; 5-35 parts by weight of an emulsifier; 5-30 parts by weight of a wetting agent; 1-10 parts by weight of a spreader; and 1-3 parts by weight of a thickener; Optionally, the flying control auxiliary agent includes: 50-80 parts by weight of modified vegetable oil; 10-25 parts by weight of an emulsifier; 8-25 parts by weight of a wetting agent; 4-10 parts by weight of a spreader; and 1-2 parts by weight of thickener.

7. The method for preparing the flying control auxiliary agent according to any one of claims 1 to 6, characterized in that: include: The modified vegetable oil, emulsifier, wetting agent, spreader, thickener and water are mixed to obtain the fly control auxiliary agent.

8. The preparation method according to claim 7, characterized in that: The temperature during the mixing is 40-60° C. and the time is at least 0.5 h.

9. Use of the aerial pest control adjuvant according to any one of claims 1 to 6 in the preparation of a pesticide composition.

10. A pesticide composition, characterized in that: The invention comprises the flying control auxiliary agent according to any one of claims 1 to 6.

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