A highly concentrated vegetable oil agricultural synergist

Abstract

The technical field of agricultural barrel-mixed adjuvants of the present invention discloses a highly concentrated vegetable oil agricultural synergist, which is an emulsifiable agricultural synergist based on vegetable oil or its methyl ester, and is composed of 80-95% of vegetable oil or its methyl ester and 5-20% of vegetable oil-based emulsifier. The highly concentrated vegetable oil agricultural synergist of the present invention has excellent emulsification performance, especially can withstand hard water of various hardnesses, and is suitable for a barrel-mixed spray synergist of pesticides.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural tank-mix adjuvants, and relates to a tank-mix synergistic adjuvant based on vegetable oil or a methylated derivative thereof, and is particularly suitable for a tank-mix spray synergistic adjuvant for pesticides. Background Art

[0002] At present, pesticide tank-mix adjuvants (especially abroad) have been widely used, especially in the past decade, due to the increase in severe global climatic conditions (low temperature, drought, little rain, waterlogging), frequent pests and diseases, and the increasing cost of development and use of pesticides and dosage products. In addition, tank-mix adjuvants can make the biological activity of the active ingredients of pesticides play a greater role, which has led to the rapid development and application of tank-mix adjuvants, and has become an indispensable component in the application of pesticides.

[0003] Tank mix adjuvants are divided into synergistic type and application type, and from the chemical category, they are currently roughly divided into surfactants, silicones, mineral oils, vegetable oils, inorganic salts, and other types (organic fluorine surfactants, polymers, waxes), etc. Among them, vegetable oil tank mix adjuvants use soybean oil, rapeseed oil, corn oil, linseed oil, modified vegetable oil (methylated vegetable oil, etc.), renewable resources (such as waste oil, biodiesel, esterified vegetable oil), etc. When using vegetable oil tank mix adjuvants, its characteristics are affinity for plants, increased adhesion of the agent, reduced volatilization and drift loss of the agent, good safety, strong permeability, and resistance to rain erosion; good stress resistance, no matter drought or low temperature, the effect is significant, and it is not easy to cause pesticide damage; wide application conditions, the role is not limited by pH conditions, and there are no special requirements for humidity and temperature. Although it is not as good as surfactants and silicone tank mix adjuvants in reducing surface tension, its final control effect is sometimes significantly better than these two adjuvants.

[0004] At present, commercial products mainly contain 50% to 60% vegetable oils and their derivatives, 15% to 20% non-ionic surfactants and 10%-20% petroleum organic solvents. They have poor resistance to hard water and because they contain relatively high levels of chemicals, such as surfactants and petroleum solvents, they can easily cause crop damage during use and pose a certain risk of pollution to the ecological environment. Summary of the invention

[0005] The purpose of the present invention is to provide a highly concentrated vegetable oil agricultural synergist, which is composed of a high concentration of vegetable oil or a methylated derivative thereof and a vegetable oil-based emulsifier, has excellent emulsification properties, is particularly resistant to hard water of various hardnesses, is suitable for a tank-mixed spray synergist for pesticides, and is more environmentally friendly and safe.

[0006] The object of the present invention is achieved in the following ways:

[0007] A highly concentrated vegetable oil agricultural synergist, the agricultural synergist contains the following components in percentage by mass:

[0008] Vegetable oil or its methyl ester 80-95%

[0009] Vegetable oil based emulsifier 5-20%.

[0010] Preferably, the highly concentrated vegetable oil agricultural synergist contains the following components in percentage by weight:

[0011] Vegetable oil or its methyl ester 85-95%

[0012] Vegetable oil based emulsifier 5-15%.

[0013] Preferably, the vegetable oil or its methyl ester is any one of soybean oil, sunflower oil, rapeseed oil, corn oil, linseed oil, castor oil, palm oil or their methyl ester.

[0014] Preferably, the vegetable oil-based emulsifier is composed of any 1-3 of castor oil polyoxyethylene ether, soybean oil polyoxyethylene ether, rosin acid polyoxyethyl dithiophosphate, rapeseed oil polyoxyethylene ether, and methyl palmitate polyoxyethylene ether.

[0015] Preferably, the vegetable oil-based emulsifier is a mixture of soybean polyoxyethylene ether, castor oil polyoxyethylene ether and rosin acid polyoxyethyl dithiophosphate in a weight ratio of 5:8:2, or a mixture of soybean polyoxyethylene ether and methyl palmitate polyoxyethylene ether in a weight ratio of 1:1, or a mixture of methyl palmitate polyoxyethylene ether and castor oil polyoxyethylene ether in a weight ratio of 8:7, or a mixture of soybean polyoxyethylene ether and rapeseed oil polyoxyethylene ether in a weight ratio of 3:7.

[0016] The preparation method of the highly concentrated vegetable oil agricultural synergist comprises the following steps: mixing vegetable oil or its methyl ester with a vegetable oil-based emulsifier according to a formula, and stirring evenly to obtain the synergist.

[0017] Compared with the prior art, the present invention has the following beneficial effects: the present invention mainly uses high-concentration vegetable oil with a concentration of more than 80%, especially more than 85%, as a starting point to prepare a highly concentrated vegetable oil agricultural synergist that can withstand hard water of different hardnesses, has particularly good emulsification and tank-mix compatibility with pesticides, and is widely applicable to tank-mix spray adjuvants for pesticides. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with specific examples, which are carried out under the preferred conditions of the present invention. The methods are conventional methods unless otherwise specified, and the raw materials can be obtained from public commercial channels unless otherwise specified. However, the embodiments of the present invention are not limited thereto.

[0019] Example 1

[0020] The mass percentage of each substance in a highly concentrated vegetable oil agricultural synergist is as follows: 85% soybean oil, 15% vegetable oil-based emulsifier (the weight ratio of soybean polyoxyethylene ether, castor oil polyoxyethylene ether and rosin acid polyoxyethyl dithiophosphate is 5:8:2).

[0021] Preparation method: According to the formula of this embodiment, vegetable oil or its methyl ester is mixed with various vegetable oil-based emulsifiers and stirred evenly to obtain a highly concentrated vegetable oil agricultural synergist.

[0022] Example 2

[0023] The mass percentage of each substance in a highly concentrated vegetable oil agricultural synergist is as follows: 90% soybean oil methyl ester, 10% vegetable oil-based emulsifier (the weight ratio of soybean polyoxyethylene ether to palmitic acid methyl ester polyoxyethylene ether is 1:1).

[0024] Preparation method: Same as Example 1.

[0025] Example 3

[0026] The mass percentage of each substance in a highly concentrated vegetable oil agricultural synergist is as follows: 85% rapeseed oil, 15% vegetable oil-based emulsifier (weight ratio of methyl palmitate polyoxyethylene ether to castor oil polyoxyethylene ether is 8:7).

[0027] Preparation method: Same as Example 1.

[0028] Example 4

[0029] The mass percentages of various substances in a highly concentrated vegetable oil agricultural synergist are as follows: 90% rapeseed oil methyl ester, 10% vegetable oil-based emulsifier (3:7 soybean polyoxyethylene ether and rapeseed oil polyoxyethylene ether).

[0030] Preparation method: Same as Example 1.

[0031] Example 5

[0032] The mass percentage of each substance in a highly concentrated vegetable oil agricultural synergist is as follows: 85% corn oil, 15% vegetable oil-based emulsifier (castor oil polyoxyethylene ether, soybean polyoxyethylene ether and rapeseed oil polyoxyethylene ether weight ratio is 5:3:7).

[0033] Preparation method: Same as Example 1.

[0034] Example 6

[0035] The mass percentages of various substances in a highly concentrated vegetable oil agricultural synergist are as follows: 90% corn oil methyl ester, 10% vegetable oil-based emulsifier (10% rosin acid polyoxyethyl dithiophosphate).

[0036] Preparation method: Same as Example 1.

[0037] Example 7

[0038] The mass percentage of each substance in a highly concentrated vegetable oil agricultural synergist is as follows: 85% sunflower oil, 15% vegetable oil-based emulsifier (the weight ratio of methyl palmitate polyoxyethylene ether, soybean polyoxyethylene ether and castor oil polyoxyethylene ether is 7:5:3).

[0039] Preparation method: Same as Example 1.

[0040] Example 8

[0041] The mass percentages of various substances in a highly concentrated vegetable oil agricultural synergist are as follows: 90% of sunflower oil methyl ester and 10% of a vegetable oil-based emulsifier (the weight ratio of soybean polyoxyethylene ether to castor oil polyoxyethylene ether is 1:1).

[0042] Preparation method: Same as Example 1.

[0043] Example 9

[0044] The mass percentages of various substances in a highly concentrated vegetable oil agricultural synergist are as follows: 85% linseed oil, 15% vegetable oil-based emulsifier (15% castor oil polyoxyethylene ether).

[0045] Preparation method: Same as Example 1.

[0046] Example 10

[0047] The mass percentages of various substances in a highly concentrated vegetable oil agricultural synergist are as follows: 90% linseed oil methyl ester, 10% vegetable oil-based emulsifier (10% castor oil polyoxyethylene ether).

[0048] Preparation method: Same as Example 1.

[0049] Embodiment 11

[0050] The mass percentage of each substance in a highly concentrated vegetable oil agricultural synergist is as follows: 85% of castor oil and 15% of vegetable oil-based emulsifier (the weight ratio of methyl palmitate polyoxyethylene ether to castor oil polyoxyethylene ether is 5:10).

[0051] Preparation method: Same as Example 1.

[0052] Example 12

[0053] The mass percentage of each substance in a highly concentrated vegetable oil agricultural synergist is as follows: 90% of castor oil methyl ester and 10% of vegetable oil-based emulsifier (the weight ratio of soybean polyoxyethylene ether to castor oil polyoxyethylene ether is 1:1).

[0054] Preparation method: Same as Example 1.

[0055] Example 13

[0056] The mass percentage of each substance in a highly concentrated vegetable oil agricultural synergist is as follows: 85% of palm oil, 15% of a vegetable oil-based emulsifier (the weight ratio of methyl palmitate polyoxyethylene ether, rosin acid polyoxyethyl dithiophosphate and castor oil polyoxyethylene ether is 10:2:3).

[0057] Preparation method: Same as Example 1.

[0058] Embodiment 14

[0059] The mass percentage of each substance in a highly concentrated vegetable oil agricultural synergist is as follows: 90% of palm oil methyl ester and 10% of vegetable oil-based emulsifier (the weight ratio of palmitic acid methyl ester polyoxyethylene ether to castor oil polyoxyethylene ether is 2:8).

[0060] Preparation method: Same as Example 1.

[0061] Comparative Example 1

[0062] The mass percentages of various substances in a highly concentrated vegetable oil agricultural synergist are as follows: 90% corn oil methyl ester and 10% agricultural emulsion 500 (calcium alkylbenzene sulfonate) as an emulsifier.

[0063] Preparation method: According to the formula of this embodiment, corn oil methyl ester and emulsifier are mixed in proportion and stirred evenly to obtain the product.

[0064] Comparative Example 2

[0065] The mass percentage of each substance in a highly concentrated vegetable oil agricultural synergist is as follows: 85% soybean oil, 15% emulsifier (lauryl dimethylamine oxide, fatty alcohol polyoxyethylene polyoxypropylene ether and ethoxylated fatty acid methyl ester sulfonate in a weight ratio of 5:8:2).

[0066] Preparation method: According to the formula of this embodiment, soybean oil is mixed with various emulsifiers in proportion and stirred evenly to obtain the product.

[0067] Comparative Example 3 (too little vegetable oil)

[0068] The mass percentage of each substance in a highly concentrated vegetable oil agricultural synergist is as follows: rapeseed oil 70%, vegetable oil-based emulsifier 30% (weight ratio of methyl palmitate polyoxyethylene ether and castor oil polyoxyethylene ether is 8:7).

[0069] Preparation method: According to the formula of this embodiment, rapeseed oil is mixed with various emulsifiers in proportion and stirred evenly to obtain the product.

[0070] Table 1 Quality stability test results

[0071]

[0072] The emulsification performance of the above Examples 1-14 (hard water hardness: 342-1000ppm, 30°C, 20-fold dilution, 18h) is free of oil separation and precipitation, and the emulsification performance is significantly better than that of Comparative Examples 1-3.

[0073] Table 2 Compatibility of barrel mix

[0074]

[0075] When the above embodiment is used in a tank mix, the synergist of the present invention and the pesticide preparation are added to water (30L of water per mu) according to a predetermined ratio and dosage (refer to the recommended dosage of the pesticide preparation), stirred evenly and then sprayed for use, which has better compatibility with the pesticide preparation.

[0076] Examples 1-4 and a commercially available agricultural vegetable oil synergist (containing 50% methyl oleate) were selected to conduct a synergistic comparison experiment on 200 g / l glufosinate-ammonium aqueous solution.

[0077] Dosage of 200g / l glufosinate aqueous solution: 200ml / mu.

[0078] Dosage of vegetable oil enhancer: 20ml / mu.

[0079] Water consumption: 60L

[0080] Spray method: Use 15L backpack sprayer (fan-shaped nozzle)

[0081] Control target: wasteland weeds (Alopecurus scabra, Goosegrass, Vetch, Erigeron fasciatus, etc.)

[0082] Table 3 Synergistic effect on glufosinate (7 days after application)

[0083] deal with Alopecuroides Goosegrass Giant vetch Erigeron sphaerocephala Example 1 90％ 95％ 88％ 97％ Example 2 91％ 93％ 90％ 94％ Example 3 89％ 95％ 89％ 94％ Example 4 90％ 96％ 88％ 96％ Commercially available vegetable oil enhancer 86％ 85％ 84％ 90％ Blank (water control) 78％ 72％ 80％ 70％

[0084] Compared with the clear water control without the synergist, the control effect of the glufosinate-ammonium aqueous solution with the synergist added was improved, and the synergistic effect of the synergist of the present invention was more significant than that of the commercially available vegetable oil synergist, especially for malignant weeds such as goosegrass and fleabane. This shows that the high-concentration vegetable oil pesticide synergist of the present invention has an excellent synergistic effect.

[0085] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A highly concentrated vegetable oil agricultural synergist, characterized in that The agricultural synergist contains the following components in percentage by weight: Vegetable oil or its methyl ester 80-95% Vegetable oil based emulsifier 5-20%.

2. The highly concentrated vegetable oil agricultural synergist according to claim 1, characterized in that The agricultural synergist contains the following components in percentage by weight: Vegetable oil or its methyl ester 85-95% Vegetable oil based emulsifier 5-15%.

3. The highly concentrated vegetable oil agricultural synergist according to claim 1 or 2, characterized in that: The vegetable oil or its methyl ester is any one of soybean oil, sunflower oil, rapeseed oil, corn oil, linseed oil, castor oil, palm oil or its methyl ester.

4. The highly concentrated vegetable oil agricultural synergist according to claim 1 or 2, characterized in that: The vegetable oil-based emulsifier is composed of any 1 to 3 of castor oil polyoxyethylene ether, soybean oil polyoxyethylene ether, rosin acid polyoxyethyl dithiophosphate, rapeseed oil polyoxyethylene ether and palmitic acid methyl ester polyoxyethylene ether.

5. A method for preparing the highly concentrated vegetable oil agricultural synergist according to claim 1 or 2, characterized in that The method comprises the following steps: mixing vegetable oil or its methyl ester with a vegetable oil-based emulsifier according to a formula, and stirring evenly to obtain the product.

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