Ammonium glyphosate aqueous auxiliary agent

Abstract

The invention provides an ammonium glyphosate aqueous auxiliary agent, which comprises the following components by mass fraction: 30-70% of alkyl glycoside; 10 to 30% of dodecynediol polyoxyethylene ether; 8-20% of sodium methylene dinaphthalene sulfonate; 5 to 15% of polyoxyethylene lauryl ether; and the balance of deionized water. The dodecynediol polyoxyethylene ether in the ammonium glyphosate water agent additive disclosed by the invention has a good wetting effect and an emulsifying and dispersing effect, and the surface performance and the rheological property of a pesticide preparation can be optimized, so that the adhesive force of liquid medicine on leaves can be improved, and the absorption and conduction of glyphosate in plants are facilitated; the absorption of the liquid medicine is promoted, so that a very good synergistic effect is achieved.

Description

Technical Field

[0001] The invention relates to a new glyphosate ammonium salt agent adjuvant, belonging to the field of herbicides. The adjuvant system of the invention has a good synergistic effect on glyphosate. Background Art

[0002] Glyphosate is an organophosphorus non-selective herbicide with the chemical name N-(phosphomethyl)glycine, commonly known as glyphosate, Roundup, etc. It is widely used due to its advantages of systemic conduction, low toxicity, killing, high efficiency, and broad spectrum. Its herbicidal mechanism is mainly through absorption by stems and leaves and then transmitted to various parts of the plant, combining with an enzyme in the plant body to block photosynthesis, disrupt plant metabolism and cause death. After entering the soil, glyphosate quickly combines with metal ions such as iron, aluminum, and calcium and loses its activity, and has little adverse effect on seeds, microorganisms and the environment in the soil. Since glyphosate has poor water solubility, it is often processed into various glyphosate salts in industry and then easily soluble in water. In the production of preparations, various surfactants are often added to reduce the surface tension of droplets on the plant leaves, achieve rapid wetting and spreading in the wax layer, help the liquid to remain on the plant leaves, and make the active ingredients better absorbed by the plant. Therefore, pesticide adjuvants play a very important role in improving the efficacy of pesticide active ingredients, improving pesticide performance, stabilizing formulation quality and reducing the hazards of active ingredients. They are one of the most important pesticide chemicals.

[0003] At present, the adjuvants used in glyphosate preparations are directly provided by the manufacturers, which are not only costly but also lack the initiative in their core ingredients, ratios and prices, making it impossible to timely understand whether the ingredients in the adjuvants affect the efficacy of glyphosate preparations. In order to further reduce costs and increase efficiency and improve the herbicidal effect of products, different types of adjuvant monomers can be mixed, and the adjuvant formula of suitable products can be quickly screened out by optimizing the surface rheological properties of pesticide preparations (such as surface tension and contact angle). At the same time, the herbicidal effect of glyphosate preparations can be intuitively observed in combination with field efficacy. This technical means can not only efficiently screen out adjuvant formulas, but also improve the herbicidal effect of pesticide preparations to achieve synergistic effects. Summary of the invention

[0004] In order to solve the deficiencies of the prior art, the present invention provides a glyphosate ammonium salt solution adjuvant which can quickly screen out a suitable adjuvant formula by changing the surface tension and contact angle, and can also improve the synergistic performance of the solution so that glyphosate can enhance the herbicidal effect.

[0005] To achieve the above object, the present invention is implemented by the following technical solutions: A new glyphosate ammonium salt agent adjuvant comprises four components: alkyl glycoside, polyoxyethylene dodecylene glycol ether, sodium methylene dinaphthalene sulfonate, and polyoxyethylene lauryl alcohol ether. The four components are mixed and stirred evenly at room temperature, and then deionized water is added to make up the mixture. The invention mainly selects the glyphosate ammonium salt agent adjuvant with the best efficacy by adjusting the proportions between the adjuvant monomers and optimizing the surface rheological properties (such as surface tension and contact angle) of the pesticide preparation.

[0006] A new glyphosate ammonium salt agent adjuvant comprises the following components in mass fraction: 30-70% of alkyl glycoside; 10-30% of dodecynediol polyoxyethylene ether; 8-20% of sodium methylene dinaphthalene sulfonate; 5-15% of lauryl alcohol polyoxyethylene ether; and the balance is deionized water.

[0007] As a preferred embodiment, the mass fractions of the components in the glyphosate ammonium salt agent adjuvant are: 40% alkyl glycoside; 16% dodecynediol polyoxyethylene ether; 8% sodium methylene dinaphthalene sulfonate; 12% lauryl alcohol polyoxyethylene ether; and 24% deionized water.

[0008] The glyphosate ammonium salt solution adjuvant of the present invention is prepared by the following method: Alkyl glucoside, dodecylene glycol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether are mixed according to the raw material ratio, stirred at room temperature until uniformly dispersed, and recorded as solution a. Sodium methylene dinaphthalene sulfonate is added to water until completely dissolved, and recorded as solution b. Solution b is added to solution a, and finally deionized water is added, and stirred for 40-60 minutes to obtain glyphosate ammonium salt solution adjuvant.

[0009] Alkyl polyglycoside refers to alkyl polyglycoside synthesized from glucose and fatty alcohol, referred to as APG, which is a non-ionic surfactant. It is a white solid powder or a light yellow oily liquid at room temperature, has high solubility in water, is non-toxic and harmless, and has no irritation to the skin. It can effectively reduce the surface tension of the liquid medicine, delay the evaporation of the liquid medicine water, and maintain the hydrated and dissolved state of the pesticide for a long time, which helps to increase the absorption rate of the pesticide by the plant leaves, and can produce a synergistic effect when compounded with various ionic and non-ionic surfactants.

[0010] Dodecynediol polyoxyethylene ether is a non-ionic surfactant, referred to as AEO, whose chemical structure contains polyoxyethylene ether, thus having excellent wettability, emulsification and dispersibility. The application of dodecynediol polyoxyethylene ether in pesticide formulations is mainly reflected in its surfactant, which can significantly change the rheological properties and physical storage properties of pesticides. Its EO chain length has a significant effect on surface properties such as surface tension, contact angle and critical micelle concentration. Dodecynediol polyoxyethylene ether can improve the dispersibility and stability of the active ingredients of pesticides in water by optimizing the surface properties and rheological properties of pesticides, thereby improving the bioavailability of pesticides.

[0011] Sodium methylene dinaphthalene sulfonate is an anionic surfactant, referred to as NNO, which is made by sulfonating naphthalene, condensing it with formaldehyde, and then neutralizing it with alkali to form a sodium salt. It has good diffusivity and protective colloid properties, which can help the active ingredients of pesticides disperse in water, thereby improving the coverage and effect of pesticides. In addition, it is also resistant to acid, alkali and hard water, making it more stable in pesticide formulations and less susceptible to environmental conditions, thereby ensuring the stability and effectiveness of pesticides.

[0012] Lauryl alcohol polyoxyethylene ether is a combination of lauryl alcohol and polyoxyethylene, referred to as PEL, with excellent biocompatibility and low molecular weight characteristics, is an important fatty alcohol polyoxyethylene ether, belongs to non-ionic surfactant. This surfactant has good emulsification, dispersing, wetting and solubilizing effects, can be compounded with various surfactants, has good compatibility, and improves the efficacy of pesticide preparations.

[0013] Compared with the prior art, the beneficial technical effects of the present invention are as follows: (1) The dodecyne glycol polyoxyethylene ether in the glyphosate ammonium salt solution adjuvant of the present invention has good wetting and emulsifying and dispersing effects, and can improve the adhesion of the pesticide solution on the leaves by optimizing the surface properties and rheological properties of the pesticide formulation, which is beneficial to the systemic conduction of glyphosate in plants, promotes the absorption of the pesticide solution, and thus plays a good synergistic role.

[0014] (2) The sodium methylene dinaphthalene sulfonate in the ammonium glyphosate solution adjuvant of the present invention not only has good diffusivity, but also has the characteristics of acid, alkali and hard water resistance, making it more stable in the pesticide formulation, thereby ensuring that the active ingredients of the pesticide can play a role efficiently and enhancing the efficacy of the pesticide formulation.

[0015] (3) The glyphosate ammonium salt solution adjuvant of the present invention optimizes the surface rheological properties (such as surface tension and contact angle) of the pesticide formulation and combines the field efficacy to quickly and efficiently screen out a suitable adjuvant formula. In addition, it also improves the synergistic effect of the pesticide formulation, reduces the surface tension of the solution, accelerates the conduction of glyphosate in the plant body, and improves the utilization rate of the pesticide. DETAILED DESCRIPTION

[0016] The present invention is specifically described below with reference to the embodiments.

[0017] Example 1 A novel glyphosate ammonium salt agent adjuvant comprises the following components in weight percentage: Alkyl Glucoside 70% Deionized water 30% First, add alkyl glycoside in proportion, stir evenly at room temperature, add water, and stir for 40-60 minutes to obtain glyphosate ammonium salt solution adjuvant. Then, mix 33% glyphosate ammonium salt with the adjuvant at a mass ratio of 8:2 to obtain glyphosate ammonium salt solution. The 33% glyphosate ammonium salt solution is a colorless transparent liquid with a viscosity (25°C) of 35.3 mPa˙s and good cold and hot storage stability.

[0018] Example 2 A novel glyphosate ammonium salt agent adjuvant comprises the following components in weight percentage: Alkyl Glucoside 50% Dodecyne glycol polyoxyethylene ether 20% Deionized water 30% First, add alkyl glycoside and dodecyne glycol polyoxyethylene ether in proportion, stir evenly at room temperature, add water, stir for 40-60 minutes, and obtain glyphosate ammonium salt solution adjuvant. Then, mix 33% glyphosate ammonium salt with the adjuvant at a mass ratio of 8:2 to obtain glyphosate ammonium salt solution. The 33% glyphosate ammonium salt solution has the appearance of a colorless transparent liquid, a viscosity (25°C) of 38mPa˙s, and good cold and hot storage stability.

[0019] Example 3 Alkyl Glucoside 45% Dodecyne glycol polyoxyethylene ether 15% Sodium Methylene Bisnaphthyl Sulfonate 10% Deionized water 30% First, alkyl glycoside and dodecyne glycol polyoxyethylene ether are added in proportion, which is referred to as solution a. Sodium methylene dinaphthalene sulfonate is added to water until it is completely dissolved, which is referred to as solution b. Solution b is added to solution a, and deionized water is added at last, and stirred for 40-60 minutes to obtain glyphosate ammonium salt solution adjuvant. Then, 33% glyphosate ammonium salt and the adjuvant are mixed at a mass ratio of 8:2 to obtain glyphosate ammonium salt solution. The 33% glyphosate ammonium salt solution has the appearance of a colorless transparent liquid, a viscosity (25°C) of 48mPa˙s, and good cold and hot storage stability.

[0020] Example 4 Alkyl Glucoside 40% Dodecyne glycol polyoxyethylene ether 20% Sodium Methylene Bisnaphthalene Sulfonate 12% Lauryl polyoxyethylene ether 10% Deionized water 18% First, alkyl glycoside, dodecyne glycol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether are added in proportion, which is recorded as solution a. Sodium methylene dinaphthalene sulfonate is added to water until it is completely dissolved, which is recorded as solution b. Solution b is added to solution a, and deionized water is added at last, and stirred for 40-60 minutes to obtain glyphosate ammonium salt solution adjuvant. Then, 33% glyphosate ammonium salt and the adjuvant are mixed in a mass ratio of 8:2 to obtain glyphosate ammonium salt solution. The 33% glyphosate ammonium salt solution has the appearance of a colorless transparent liquid, the viscosity (25°C) is 52.1mPa˙s, and the cold and hot storage stability is good.

[0021] Example 5 Alkyl Glucoside 40% Dodecyne glycol polyoxyethylene ether 18% Sodium Methylene Bisnaphthyl Sulfonate 10% Lauryl polyoxyethylene ether 10% Deionized water 22% First, alkyl glycoside, dodecyne glycol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether are added in proportion, which is recorded as solution a. Sodium methylene dinaphthalene sulfonate is added to water until it is completely dissolved, which is recorded as solution b. Solution b is added to solution a, and deionized water is added at last, and stirred for 40-60 minutes to obtain glyphosate ammonium salt solution adjuvant. Then, 33% glyphosate ammonium salt and the adjuvant are mixed at a mass ratio of 8:2 to obtain glyphosate ammonium salt solution. The 33% glyphosate ammonium salt solution has the appearance of a colorless transparent liquid, the viscosity (25°C) is 54.6mPa˙s, and the cold and hot storage stability is good.

[0022] Example 6 Alkyl Glucoside 40% Dodecyne glycol polyoxyethylene ether 18% Sodium Methylene Bisnaphthalene Sulfonate 8% Lauryl polyoxyethylene ether 12% Deionized water 22% First, alkyl glycoside, dodecyne glycol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether are added in proportion, which is recorded as solution a. Sodium methylene dinaphthalene sulfonate is added to water until it is completely dissolved, which is recorded as solution b. Solution b is added to solution a, and deionized water is added at last, and stirred for 40-60 minutes to obtain glyphosate ammonium salt solution adjuvant. Then, 33% glyphosate ammonium salt and the adjuvant are mixed in a mass ratio of 8:2 to obtain glyphosate ammonium salt solution. The 33% glyphosate ammonium salt solution has the appearance of a colorless transparent liquid, the viscosity (25°C) is 53.2mPa˙s, and the cold and hot storage stability is good.

[0023] Example 7 Alkyl Glucoside 40% Dodecyne glycol polyoxyethylene ether 16% Sodium Methylene Bisnaphthalene Sulfonate 8% Lauryl polyoxyethylene ether 12% Deionized water 24% First, alkyl glycoside, dodecyne glycol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether are added in proportion, which is recorded as solution a. Sodium methylene dinaphthalene sulfonate is added to water until it is completely dissolved, which is recorded as solution b. Solution b is added to solution a, and deionized water is added at last, and stirred for 40-60 minutes to obtain glyphosate ammonium salt solution adjuvant. Then, 33% glyphosate ammonium salt and the adjuvant are mixed in a mass ratio of 8:2 to obtain glyphosate ammonium salt solution. The 33% glyphosate ammonium salt solution has the appearance of a colorless transparent liquid, the viscosity (25°C) is 52.8mPa˙s, and the cold and hot storage stability is good.

[0024] Example 8 Alkyl Glucoside 40% Dodecyne glycol polyoxyethylene ether 16% Sodium Methylene Bisnaphthalene Sulfonate 8% Lauryl Polyoxyethylene 10% Deionized water 26% First, alkyl glycoside, dodecyne glycol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether are added in proportion, which is recorded as solution a. Sodium methylene dinaphthalene sulfonate is added to water until it is completely dissolved, which is recorded as solution b. Solution b is added to solution a, and deionized water is added at last, and stirred for 40-60 minutes to obtain glyphosate ammonium salt solution adjuvant. Then, 33% glyphosate ammonium salt and the adjuvant are mixed in a mass ratio of 8:2 to obtain glyphosate ammonium salt solution. The 33% glyphosate ammonium salt solution has the appearance of a colorless transparent liquid, the viscosity (25°C) is 54.3mPa˙s, and the cold and hot storage stability is good.

[0025] Example 9 Alkyl Glucoside 40% Isopropyl alcohol polyoxyethylene ether 16% Sodium Methylene Bisnaphthalene Sulfonate 8% Lauryl polyoxyethylene ether 12% Deionized water 24% First, alkyl glycoside, isomeric alcohol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether are added in proportion, which is recorded as solution a. Sodium methylene dinaphthalene sulfonate is added to water until it is completely dissolved, which is recorded as solution b. Solution b is added to solution a, and deionized water is added at last, and stirred for 40-60 minutes to obtain glyphosate ammonium salt solution adjuvant. Then, 33% glyphosate ammonium salt and the adjuvant are mixed in a mass ratio of 8:2 to obtain glyphosate ammonium salt solution. The 33% glyphosate ammonium salt solution has the appearance of a colorless transparent liquid, the viscosity (25°C) is 66.7mPa˙s, and the cold and hot storage stability is good.

[0026] Example 10 Alkyl Glucoside 40% Fatty alcohol polyoxyethylene ether 16% Sodium Methylene Bisnaphthalene Sulfonate 8% Lauryl polyoxyethylene ether 12% Deionized water 24% First, alkyl glycoside, dodecylene glycol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether are added in proportion, which is recorded as solution a. Sodium methylene dinaphthalene sulfonate is added to water until it is completely dissolved, which is recorded as solution b. Solution b is added to solution a, and deionized water is added at last, and stirred for 40-60 minutes to obtain glyphosate ammonium salt solution adjuvant. Then, 33% glyphosate ammonium salt and the adjuvant are mixed in a mass ratio of 8:2 to obtain glyphosate ammonium salt solution. The 33% glyphosate ammonium salt solution has the appearance of a colorless transparent liquid, the viscosity (25°C) is 72.3mPa˙s, and the cold and hot storage stability is good.

[0027] Embodiment 11 Field efficacy test Drug supply reagents: 10 kinds of glyphosate ammonium salt water solutions in Examples 1-10.

[0028] Control agent: clean water control.

[0029] Target of control: Gramineae and broad-leaved weeds in non-arable land, such as barnyard grass, Xanthium sibiricum, and Goosegrass, etc.

[0030] Test method: Weigh various pesticides according to the area of ​​the test plot, dilute with water, and use a backpack sprayer to spray the stems and leaves. Observe the weed death every day after spraying, and compare the herbicidal activity of these glyphosate ammonium salt solutions.

[0031] Table 1 Field efficacy test results of various glyphosate ammonium salt solutions of the present invention are shown in the following table (15 days after application)

[0032] Table 2 Field efficacy test results of various glyphosate ammonium salt solutions of the present invention are shown in the following table (30 days after application)

[0033] The results of field efficacy tests on various glyphosate ammonium salt solutions of the present invention are shown in Tables 1 and 2. The test results show that the glyphosate ammonium salt solution prepared by the auxiliary monomer raw materials of alkyl glycoside, dodecynediol polyoxyethylene ether, sodium methylene dinaphthalene sulfonate, and lauryl alcohol polyoxyethylene ether has higher control effects on broad-leaved and gramineous weeds than Example 9 and Example 10, further confirming that the herbicide prepared by the auxiliary mixture of the present invention containing dodecynediol polyoxyethylene ether has the best weed control effect and has a significant synergistic effect on the glyphosate ammonium salt solution of the present invention.

[0034] Example 12 Determination of performance constants of various glyphosate ammonium salt solutions of the present invention Determination method: Surface tension is determined according to GB_T 22237-2008, cold and hot storage stability is determined according to GB_T 19137-2003 (cold storage) and GB_T 19136-2021 (hot storage), and contact angle is determined using conventional liquid determination methods in the art.

[0035] Table 3 Performance constants of various glyphosate ammonium salt solutions in the present invention

[0036] The performance constants of various glyphosate ammonium salt solutions of the present invention are shown in Table 3. The measurement results show that the glyphosate ammonium salt solution prepared by alkyl glycoside, dodecynediol polyoxyethylene ether, sodium methylene dinaphthalene sulfonate, and lauryl alcohol polyoxyethylene ether of the present invention has lower surface tension and contact angle than Example 9 and Example 10, indicating that the glyphosate ammonium salt solution can achieve rapid wetting and spreading in the wax layer, help the drug solution to remain on the plant leaves, and make the original drug better absorbed by the plant to achieve a synergistic effect.

Claims

1. A glyphosate ammonium salt solution adjuvant, characterized in that: The invention comprises the following components in mass fraction: 30-70% of alkyl glycoside; 10-30% of dodecynediol polyoxyethylene ether; 8-20% of sodium methylene dinaphthalene sulfonate; 5-15% of lauryl alcohol polyoxyethylene ether; and the balance is deionized water.

2. The glyphosate ammonium salt agent adjuvant according to claim 1, characterized in that: The mass fractions of the components in the ammonium glyphosate solution adjuvant are: 40% alkyl glycoside; 16% dodecyne glycol polyoxyethylene ether; 8% sodium methylene dinaphthalene sulfonate; 12% lauryl alcohol polyoxyethylene ether; and 24% deionized water.

3. The glyphosate ammonium salt agent adjuvant according to claim 1 or 2, characterized in that: Mix the raw materials of alkyl glycoside, dodecyne glycol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether in the appropriate proportion, and stir at room temperature until they are evenly dispersed, which is recorded as solution a; Sodium methylene dinaphthalene sulfonate was added into water until it was completely dissolved, which was recorded as solution b; Add solution b into solution a, and finally add deionized water, and stir to mix well to obtain the glyphosate ammonium salt solution adjuvant.

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