阅读说明：本技术 一种高效型二甲草甘膦水剂专用增效剂及其制备方法 (Special efficient synergist for dimethylglyphosate aqueous solution and preparation method thereof ) 是由 何华雄 于 2020-07-15 设计创作，主要内容包括：本发明公开了一种高效型二甲草甘膦水剂专用增效剂,包括下述成分：氧化胺、甜菜碱、表面活性剂、乳化剂、分散剂、润湿剂、渗透剂、溶剂、pH调节剂、去离子水。本发明的有益效果为：本发明所述专用增效剂生产工艺简单,制备容易,产品合格率高,产品流动性好,易于施药使用,使用泡沫少,使用量低,降低使用成本；此外,以本发明制备的高效型二甲草甘膦水剂专用增效剂在不破坏其原有功能的前提下,将带有不同官能团的表面活性剂进行复配,在最佳比例下缩合,使每一种表面活性剂在其他表面活性剂下发挥协同作用；除草效果好、杂草抗性差,药效持续时间长等特点。(The invention discloses a special synergist for a high-efficiency glyphosate aqueous solution, which comprises the following components: amine oxide, betaine, surfactant, emulsifier, dispersant, wetting agent, penetrant, solvent, pH regulator and deionized water. The invention has the beneficial effects that: the special synergist disclosed by the invention is simple in production process, easy to prepare, high in product qualification rate, good in product fluidity, easy to apply, less in used foam, low in usage amount and low in use cost; in addition, the special synergist for the high-efficiency glyphosate aqueous solution prepared by the invention is prepared by compounding surfactants with different functional groups under the premise of not damaging the original functions of the synergist, and condensing the surfactants at the optimal proportion to ensure that each surfactant has synergistic action under other surfactants; good weeding effect, poor weed resistance, long pesticide effect duration and the like.)

1. The special synergist for the high-efficiency glyphosate aqueous solution is characterized by comprising the following components in percentage by weight: 5-15% of amine oxide, 5-15% of betaine, 10-20% of surfactant, 1-20% of emulsifier, 1-20% of dispersant, 1-20% of wetting agent, 0.1-10% of penetrating agent, 1-10% of solvent, 0.1-5% of pH regulator and the balance of deionized water.

2. The special synergist for the high-efficiency glyphosate aqueous solution according to claim 1, characterized by comprising the following components in percentage by weight: 8-12% of amine oxide, 8-12% of betaine, 12-18% of surfactant, 5-15% of emulsifier, 5-15% of dispersant, 5-15% of wetting agent, 3-8% of penetrating agent, 3-8% of solvent, 1-3% of pH regulator and the balance of deionized water; preferably, the composition comprises the following components in percentage by weight: 10% of amine oxide, 10% of betaine, 15% of surfactant, 13% of emulsifier, 13% of dispersant, 13% of wetting agent, 5% of penetrating agent, 5% of solvent, 2% of pH regulator and the balance of deionized water.

3. The special synergist for the high-efficiency aqueous dimethylglyphosate solution according to claim 1, wherein the amine oxide is one of dodecyl dimethyl amine oxide, tetradecyl dimethyl amine oxide, lauramidopropyl dimethyl amine oxide, cocamidopropyl amine oxide, dodecyl dihydroxyethyl amine oxide, tetradecyl dihydroxyethyl amine oxide, octadecyl amidopropyl amine oxide, dihydroxyethyl tallow amine oxide, oleamidopropyl dimethyl amine oxide, or a mixture thereof.

4. The special synergist for high-efficiency glyphosate water aqua according to claim 1, wherein the betaine is one or a mixture of lauramidopropyl betaine, dodecyl dimethyl betaine, octadecyl dimethyl betaine, erucamidopropyl betaine, cocamidopropyl betaine, oleamidopropyl betaine, cocamidopropyl hydroxysultaine, lauramidopropyl hydroxysultaine, dodecyl hydroxypropyl sultaine and erucamidopropyl hydroxysultaine.

5. The special synergist for the high-efficiency dimethylglyphosate aqueous solution according to claim 1, wherein the surfactant is one or a mixture of nonylphenol polyoxyethylene ether, octylphenol polyoxyethylene ether, dodecylphenol polyoxyethylene ether, ditributylphenol polyoxyethylene ether, phenethylphenol polyoxypropylene polyoxyethylene ether, dibenzylbiphenyl polyoxypropylene polyoxyethylene ether, castor oil polyoxyethylene ether, phenethylcumylphenol polyoxyethylene ether, sorbitol ester polyoxyethylene ether and phenethylphenol polyoxyethylene ether.

6. The special synergist for the high-efficiency glyphosate aqueous solution according to claim 1, wherein the emulsifier is one or a mixture of cocoyl propyl dimethyl tertiary amine, oleamidopropyl dimethyl tertiary amine, erucamidopropyl dimethyl tertiary amine, lauramidopropyl dimethyl tertiary amine, caprylyl acyl propyl dimethyl tertiary amine, behenamidopropyl dimethylamine and stearamidopropyl dimethylamine; preferably, the dispersant is one or a mixture of block polyether, alkyl phenyl ether sulfonate, polycarboxylate, polyether phosphate, alkylphenol polyether phosphate and alkylphenol polyether sulfate; more preferably, the wetting agent is one of fatty alcohol polyether, alkylphenol polyether, alkyl sulfate, isomeric alcohol polyether, tallow amine polyether, sodium dodecyl sulfate or a mixture thereof.

7. The special synergist for the high-efficiency aqueous dimethylglyphosate solution according to claim 1, wherein the penetrant is at least one of a penetrant JFC, a penetrant JFC-1 and a penetrant JFC-2. Preferably, the solvent is one of methanol, ethanol, isopropanol, ethylene glycol and propylene glycol; more preferably, the pH regulator is one of citric acid, hydrochloric acid, oxalic acid, and acetic acid.

8. The preparation method of the special synergist for the high-efficiency glyphosate aqueous solution as claimed in any one of claims 1 to 7, characterized by comprising the following steps:

(1) mixing and stirring amine oxide, betaine, a surfactant, an emulsifier and deionized water uniformly under a heating condition to obtain a mixture a;

(2) and (3) sequentially adding a wetting agent, a dispersing agent, a penetrating agent and a solvent into the mixture a, heating, mixing and stirring uniformly, adding a pH regulator, regulating the pH to 5.3-5.5, and stirring uniformly to obtain the special synergist for the high-efficiency glyphosate aqueous solution.

9. The method for preparing the special synergist for the high-efficiency glyphosate aqueous solution according to claim 8, wherein the mixing and stirring temperature in the step (1) is 55-65 ℃.

Technical Field

The invention belongs to the technical field of pesticides, and particularly relates to a special synergist for a high-efficiency glyphosate aqueous solution and a preparation method thereof.

Background

Glyphosate, having the chemical formula:

is the most widely applied herbicide in the global scope, and can prevent and control annual weeds and perennial deep-rooted weeds. The pure glyphosate product is insoluble in common organic solvents, and the isopropylamine salt is completely dissolved in water. It is non-flammable, non-explosive, stable in storage at normal temp., and is a non-selective, residue-free biocidal herbicide. It is absorbed into plant body through stem and leaf to inhibit enolpyruvyl shikimate phosphate synthetase in plant body, so as to inhibit the conversion of shikimate to phenylalanine, tyrosine and tryptophan, interfere the synthesis of protein and result in plant death. The glyphosate gradually loses activity after entering soil, is ineffective to unborn weeds and seeds, and is widely used for weeding before sowing in no-tillage fields such as rubber, mulberry, tea, orchards, sugarcane fields and the like.

The methoxone sodium is a phenoxy acetic acid selective systemic transfer hormone type herbicide, has pungent smell, is easily soluble in water, is a reddish brown or tan transparent liquid, is easy to absorb moisture and agglomerate when being dried, does not deteriorate, can be absorbed and conducted by plant roots, stems and leaves, is safe to gramineous crops, is sensitive to broad leaf crops, can effectively prevent and kill broad leaf weeds and cyperus weeds, and is often compounded with other components to be used as the herbicide.

With the increase of the dosage of the weed herbicide in farmland, the drug resistance of weeds is enhanced, and the requirements of farmers and distributors on the herbicide are increasingly strict in the face of increasingly prominent weed resistance problems and frequent herbicide hazard phenomena. The single glyphosate has poor control effect, short control time and general pesticide effect, and when a certain selective herbicide is mixed, the control effect and the weed control spectrum of the glyphosate can be effectively improved, thereby being very conductive to controlling special weeds. The methoxone sodium as an excellent herbicide can be reasonably and scientifically matched with the glyphosate, so that the malignant weeds with resistance to common glyphosate can be effectively prevented and removed, and the defect of resistance of the weeds to a single dose of glyphosate is overcome. The two ingredients can be mixed and matched to have strong synergistic effect, so that the dosage of the pesticide to the weeds can be reduced, the pesticide pollution and the cost can be reduced, the resistance characteristic of the weeds to the pesticide can be reduced, and the pesticide effect can be exerted to a greater extent. However, the existing market has few and few high-efficiency surfactants for compounding glyphosate and methoxone sodium, so that it is necessary and meaningful to try to innovatively develop a surfactant for compounding glyphosate and methoxone sodium to reduce the dosage, reduce the drug resistance of weeds and improve the drug effect and the use efficiency.

The use of the glyphosate and the methoxone sodium compound surfactant can greatly reduce the unit usage amount of the pesticide, reduce the use cost and reduce the environmental pollution, and is beneficial to the large-area popularization and use of the compound product.

Disclosure of Invention

The invention aims to provide a special synergist for a high-efficiency glyphosate aqueous solution and a preparation method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

a special synergist for a high-efficiency glyphosate aqueous solution comprises the following components in percentage by weight: 5-15% of amine oxide, 5-15% of betaine, 10-20% of surfactant, 1-20% of emulsifier, 1-20% of dispersant, 1-20% of wetting agent, 0.1-10% of penetrating agent, 1-10% of solvent, 0.1-5% of pH regulator and the balance of deionized water.

The special synergist for the high-efficiency glyphosate aqueous solution is a preferred embodiment, and comprises the following components in percentage by weight: 8-12% of amine oxide, 8-12% of betaine, 12-18% of surfactant, 5-15% of emulsifier, 5-15% of dispersant, 5-15% of wetting agent, 3-8% of penetrating agent, 3-8% of solvent, 1-3% of pH regulator and the balance of deionized water; preferably, the composition comprises the following components in percentage by weight: 10% of amine oxide, 10% of betaine, 15% of surfactant, 13% of emulsifier, 13% of dispersant, 13% of wetting agent, 5% of penetrating agent, 5% of solvent, 2% of pH regulator and the balance of deionized water.

Amine oxide is an oxide of a tertiary amine having at least one long chain alkyl group, usually obtained by oxidizing the tertiary amine with hydrogen peroxide, has chemical properties similar to those of amphoteric surfactants, is compatible with both anionic surfactants and nonionic and cationic surfactants, and is a multifunctional amphoteric surfactant. The aqueous solution of the antibacterial calcium soap is cationic in acidic conditions, is nonionic in alkaline conditions, has good thickening, antistatic, softening, foam increasing, foam stabilizing and decontamination properties, also has the sterilization/calcium soap dispersing ability, and has good biodegradability, thus belonging to an environment-friendly daily chemical product.

Betaine is an alkaloid, has strong moisture absorption performance, is an important osmotic adjusting substance, and is important for enhancing stress resistance and drought resistance of plants.

The surfactant is a substance which is added with a small amount of substance and can cause the interface state of a solution system of the surfactant to change obviously, has fixed hydrophilic oleophilic groups and can be arranged directionally on the surface of the solution, and the molecular structure of the surfactant has amphipathy, one end of which is a hydrophilic group and the other end of which is a hydrophobic group; the hydrophilic group is often a polar group, such as carboxylic acid, sulfonic acid, sulfuric acid, amino or amino groups and salts thereof, hydroxyl, amide, ether linkages, and the like may also be used as the polar hydrophilic group; and the hydrophobic group is often a non-polar hydrocarbon chain, such as a hydrocarbon chain of 8 or more carbon atoms.

Emulsifiers are compounds which form stable emulsions of mixtures of two or more immiscible components. The principle of action is that during the emulsification process, the dispersed phase is dispersed in the form of droplets (micron-sized) in the continuous phase, and the emulsifier reduces the interfacial tension of the components in the mixed system and forms a firmer film on the surface of the droplets or forms an electric double layer on the surface of the droplets due to the electric charge given by the emulsifier, thus preventing the droplets from aggregating with each other and maintaining a uniform emulsion.

The dispersant is a surfactant which has two opposite properties of lipophilicity and hydrophilcity in a molecule. The amphiphilic agent is capable of uniformly dispersing solid and liquid particles of inorganic and organic pigments which are difficult to dissolve in liquids, and also preventing settling and agglomeration of the particles to form stable suspensions.

Wetting agents can make solid materials more susceptible to water. The solid material is wetted by reducing its surface tension or interfacial tension, allowing water to spread on or penetrate the surface of the solid material.

The penetrant is fully called fatty alcohol-polyoxyethylene ether, and belongs to a nonionic surfactant. The penetrant is a substance which has the function of penetration, has fixed hydrophilic and lipophilic groups, can be directionally arranged on the surface of a solution, and can obviously reduce the surface tension.

As a preferred embodiment, the amine oxide is one of dodecyl dimethyl amine oxide, tetradecyl dimethyl amine oxide, lauramidopropyl dimethyl amine oxide, cocamidopropyl amine oxide, dodecyl dihydroxyethyl amine oxide, tetradecyl dihydroxyethyl amine oxide, octadecyl amidopropyl amine oxide, dihydroxyethyl tallow ammonium oxide, oleamidopropyl dimethyl amine oxide, or a mixture thereof.

As a preferable embodiment, the betaine is one or a mixture of lauramidopropyl betaine, dodecyl dimethyl betaine, octadecyl dimethyl betaine, erucamidopropyl betaine, cocamidopropyl betaine, oleamidopropyl betaine, cocamidopropyl hydroxysultaine, lauramidopropyl hydroxysultaine, dodecyl hydroxypropyl sultaine and erucamidopropyl hydroxysultaine.

As a preferred embodiment, the surfactant is one or a mixture of nonylphenol polyoxyethylene ether, octylphenol polyoxyethylene ether, dodecylphenol polyoxyethylene ether, ditributylphenol polyoxyethylene ether, phenethylphenol polyoxypropylene polyoxyethylene ether, dibenzylbiphenyl polyoxyethylene ether, dibenzyl diphenol polyoxypropylene polyoxyethylene ether, castor oil polyoxyethylene ether, phenethyl cumylphenol polyoxyethylene ether, sorbitol ester polyoxyethylene ether and phenethyl phenol polyoxyethylene ether.

As a preferred embodiment, the emulsifier is one or a mixture of cocoyl propyl dimethyl tertiary amine, oleamidopropyl dimethyl tertiary amine, erucamidopropyl dimethyl tertiary amine, lauramidopropyl dimethyl tertiary amine, caprylyl decyl acyl propyl dimethyl tertiary amine, behenamidopropyl dimethylamine and stearamidopropyl dimethylamine; preferably, the dispersant is one or a mixture of block polyether, alkyl phenyl ether sulfonate, polycarboxylate, polyether phosphate, alkylphenol polyether phosphate and alkylphenol polyether sulfate; more preferably, the wetting agent is one of fatty alcohol polyether, alkylphenol polyether, alkyl sulfate, isomeric alcohol polyether, tallow amine polyether, sodium dodecyl sulfate or a mixture thereof.

As a preferable embodiment, the penetrant is at least one of a penetrant JFC, a penetrant JFC-1 and a penetrant JFC-2; preferably, the solvent is one of methanol, ethanol, isopropanol, ethylene glycol and propylene glycol; more preferably, the pH regulator is one of citric acid, hydrochloric acid, oxalic acid, and acetic acid.

The formula of the penetrating agent JFC is RO (CH2CH2O) nH, usually R is C8-C10 n is 4-8, the penetrating agent JFC has good water solubility, high penetrating and wetting performance and emulsifying, dispersing and purifying performance.

The penetrating agent JFC-1 is alkylphenol polyoxyethylene ether, is easy to dissolve in water, has excellent penetrating performance, and does not influence the penetrating power above the cloud point; has strong wool washing capability, is easy to wash various greasy dirt and has soft hand feeling.

The penetrating agent JFC-2 is sec-octanol polyoxyethylene ether, the structural formula is C8H17(CH2CH2O) nH, n is 1-6, the wetting property and the rewetting property are good, the penetrating agent has emulsifying and washing effects, the penetrating agent does not have affinity to various fibers, and the penetrating agent JFC-2 can be mixed with various surfactants.

In a second aspect of the application, a preparation method of a special synergist for a high-efficiency glyphosate aqueous solution is provided, which comprises the following steps:

(1) mixing and stirring amine oxide, betaine, a surfactant, an emulsifier and deionized water uniformly under a heating condition to obtain a mixture a;

(2) and (3) sequentially adding a wetting agent, a dispersing agent, a penetrating agent and a solvent into the mixture a, heating, mixing and stirring uniformly, adding a pH regulator, regulating the pH to 5.3-5.5, and stirring uniformly to obtain the special synergist for the high-efficiency glyphosate aqueous solution.

As a preferred embodiment, in the step (1), the mixing and stirring temperature is 55-65 ℃.

Compared with the prior art, the invention has the beneficial effects that:

1. the production process is simple, the preparation is easy, the product qualification rate is high, the product fluidity is good, the application is easy, the used foam is less, the use amount is low, and the use cost is reduced.

2. The special synergist for the high-efficiency glyphosate aqueous solution prepared by the invention is prepared by compounding surfactants with different functional groups and condensing the surfactants at an optimal proportion on the premise of not damaging the original functions of the special synergist, so that each surfactant can play a synergistic effect under other surfactants. Good weeding effect, poor weed resistance, long pesticide effect duration and the like.

3. The special synergist for the high-efficiency glyphosate aqueous solution prepared by the invention is environment-friendly, free of pollution, free of agglomeration, safe in transportation and safe and convenient to use.

Detailed Description

For a better understanding of the nature of the present invention, reference should be made to the following detailed description taken in conjunction with the examples, which are not intended to limit the invention, but are to be construed to illustrate, but fall within the scope of the invention, as defined in the appended claims, as defined by the following claims, and all changes, substitutions and modifications that fall within the true spirit and scope of the invention