Benzamamin.gibberellic acid soluble concentrate and preparation method thereof

Abstract

The invention relates to the field of plant growth medicaments, and particularly discloses a benzylamine gibberellic acid soluble concentrate and a preparation method thereof. The benzylamine and gibberellic acid soluble concentrate is prepared from the following raw materials in percentage by mass: 3.5 to 4.2 percent of benzylamine and gibberellic acid composite medicament, 4.5 to 8.9 percent of composite surfactant, 0.5 to 0.8 percent of stabilizer, 20 to 25 percent of organic solvent and the balance of water, in addition, the preparation method has the advantage of improving the stability of the benzylamine-gibberellic acid soluble concentrate.

Description

Technical Field

[0001] The present application relates to the field of plant growth agents, and more specifically, to a benzylamine-gibberellic acid soluble solution and a preparation method thereof. Background Art

[0002] Benzylamino gibberellic acid soluble concentrate is a plant growth regulator, which is a compound of gibberellic acid and benzylaminopurine. This regulator is widely used in agriculture, mainly used to increase the fruit setting rate of fruit trees, promote fruit expansion, improve fruit shape, and increase the color and quality of the fruit skin. In addition, it can also prevent premature aging of fruit trees, beautify the fruit shape, and make the fruit more robust and beautiful.

[0003] However, gibberellic acid and benzylaminopurine, the active ingredients of the benzylamino gibberellic acid soluble concentrate, tend to decompose slowly during storage and are easily affected by external environmental factors such as temperature, pH, salt and other factors, which causes the content of the active ingredients of the benzylamino gibberellic acid soluble concentrate to decrease, thereby affecting the application effect of the benzylamino gibberellic acid soluble concentrate. Summary of the invention

[0004] In order to improve the stability of benzylamine·gibberellic acid soluble solution, the present application provides a benzylamine·gibberellic acid soluble solution and a preparation method thereof.

[0005] In the first aspect, the present application provides a benzylamine gibberellic acid soluble solution, which adopts the following technical solution: A benzylamine·gibberellic acid soluble solution comprises the following raw materials in percentage by mass: 3.5-4.2% of a benzylamine·gibberellic acid compound agent, 4.5-8.9% of a compound surfactant, 0.5-0.8% of a stabilizer, 20-25% of an organic solvent, and the remainder being water.

[0006] By adopting the above technical scheme, benzylamine·gibberellic acid is compounded by benzylamine and gibberellic acid. Benzylamine can promote the division, growth and enlargement of plant cells, prolong the growth period of crops and fruits, and achieve the effect of increasing fruits. Gibberellic acid can promote cell separation and elongation, thereby promoting fruit ripening. The combination of the two has a synergistic effect and can effectively promote cell division and fruit growth. The composite surfactant and stabilizer can improve the dispersibility of benzylamine·gibberellic acid, thereby improving the stability of the soluble solution of benzylamine·gibberellic acid.

[0007] Preferably, the mass ratio of benzylamine to gibberellic acid in the benzylamine·gibberellic acid composite agent is (1-1.2):(2.9-3.2).

[0008] By adopting the above technical solution and controlling the mass ratio of benzylamine to gibberellic acid, the synergistic effect of benzylamine and gibberellic acid can be effectively controlled, thereby effectively improving the effectiveness of the benzylamine·gibberellic acid composite agent.

[0009] Preferably, the composite surfactant comprises sodium lauryl sulfate and fatty alcohol polyoxyethylene ether in a mass ratio of (1.02-1.16):(0.98-1.17).

[0010] By adopting the above technical scheme, sodium dodecyl sulfate is an anionic surfactant, fatty alcohol polyoxyethylene ether is a non-ionic surfactant, and sodium dodecyl sulfate and fatty alcohol polyoxyethylene ether are compounded according to a mass ratio, so that there is a synergistic effect between the two, which can effectively reduce the surface tension of the soluble solution, thereby facilitating the uniform dispersion of benzylamine and gibberellic acid, and facilitating the improvement of the stability of the soluble solution.

[0011] Preferably, the stabilizer is polystyrene porous microspheres.

[0012] By adopting the above technical scheme, the polystyrene porous microspheres have a large specific surface area, are uniformly dispersed in the soluble solution, can adsorb benzylamine and gibberellic acid in the soluble solution, and the polystyrene porous microspheres protect the benzylamine and gibberellic acid. At the same time, the benzylamine and gibberellic acid are loaded on the microspheres and can be uniformly dispersed in the soluble solution, thereby improving the stability of benzylamine and gibberellic acid in the soluble solution.

[0013] Preferably, the method for preparing the porous polystyrene microspheres comprises the following steps: uniformly mixing styrene, divinylbenzene, azobisisobutyronitrile and toluene, heating to 45-50°C, adding maleic anhydride, adding polyvinyl alcohol solution and water while stirring, heating to 70-75°C until the reaction is completed, filtering, washing and drying to obtain the porous polystyrene microspheres.

[0014] By adopting the above technical scheme, toluene is used as a porogen, divinylbenzene is used as a cross-linking agent, and styrene is cross-linked with maleic anhydride to obtain polystyrene porous microspheres. The prepared polystyrene porous microspheres have large pores, good hydrophilicity, good dispersibility in soluble solvents, and a large specific surface area, and can effectively adsorb benzylamine and gibberellic acid.

[0015] Preferably, the amount of maleic anhydride added is 20-23 wt % of styrene.

[0016] By adopting the above technical scheme, the addition of maleic anhydride can effectively improve the hydrophilicity of polystyrene porous microspheres, thereby facilitating the uniform dispersion of polystyrene porous microspheres in soluble solutions. Too little addition of maleic anhydride can easily affect the hydrophilicity of polystyrene porous microspheres, while too much addition can easily affect the specific surface area of ​​polystyrene porous microspheres, thereby affecting the adsorption performance of polystyrene porous microspheres to benzylamine and gibberellic acid.

[0017] Preferably, the polystyrene porous microspheres are treated as follows: adding the polystyrene porous microspheres to an ethanol aqueous solution, ultrasonically dispersing the mixture to obtain a mixed solution, dissolving styrene, sodium styrene sulfonate and azobisisobutyronitrile in the ethanol aqueous solution and ultrasonically dispersing the mixture, mixing the mixture with the mixed solution, ultrasonically dispersing the mixture, heating the mixture to 30-35° C. for swelling for 11-12 hours, introducing nitrogen, heating the mixture to 70-75° C., stirring the mixture under nitrogen protection for 23-24 hours, centrifuging, separating and drying the mixture to obtain sulfonated polystyrene porous microspheres.

[0018] By adopting the above technical scheme, sodium styrene sulfonate is copolymerized with polystyrene under the condition of azobisisobutyronitrile as an initiator, and sulfonic acid groups are introduced into the polystyrene porous microspheres. The sulfonic acid groups are ionized under acidic conditions and carry negative charges. Through electrostatic action, the adsorption effect of the sulfonated polystyrene porous microspheres on benzylamine and gibberellic acid is improved.

[0019] Preferably, the sulfonated polystyrene porous microspheres are treated as follows: sulfonated polystyrene porous microspheres, dichloromethane and anhydrous aluminum chloride are mixed, magnetically stirred for 11-12 hours, reacted at 70-75° C. for 11-12 hours, centrifuged, filtered and washed, and then immersed in a mixed solution of hydrochloric acid, deionized water and acetone for 24 hours, extracted and dried.

[0020] By adopting the above technical scheme, the sulfonated polystyrene porous microspheres undergo a hyper-crosslinking reaction after swelling, thereby introducing a bridging structure between the polystyrene molecular chains to form a large number of micropores and mesopores, effectively increasing the specific surface area of ​​the sulfonated polystyrene porous microspheres, thereby enhancing the adsorption performance of the sulfonated polystyrene porous microspheres.

[0021] In a second aspect, the present application provides a method for preparing a benzylamine gibberellic acid soluble solution, using the following technical solution: A method for preparing a benzylamine·gibberellic acid soluble solution comprises the following steps: mixing a benzylamine·gibberellic acid composite agent, a surfactant, a stabilizer and an organic solvent at a rotation speed of 1500-1800 r / min and a stirring time of 15-20 min to obtain a benzylamine·gibberellic acid soluble solution.

[0022] By adopting the above technical scheme, the various raw materials are mixed and stirred evenly to obtain the benzylamine·gibberellic acid soluble solution, and the preparation method is relatively simple.

[0023] In summary, this application has the following beneficial effects: 1. Since the benzylamine·gibberellic acid composite agent is used in the present application, the benzylamine·gibberellic acid is composited by benzylamine and gibberellic acid. Benzylamine can promote plant cell division, growth and enlargement, prolong the growth period of crops and fruits, and achieve the effect of increasing fruits. Gibberellic acid can promote cell separation and elongation, thereby promoting fruit ripening. The combination of the two has a synergistic effect, can effectively promote cell division and fruit growth, and the composite surfactant and stabilizer can improve the dispersibility of benzylamine·gibberellic acid, thereby improving the stability of the benzylamine·gibberellic acid soluble solution.

[0024] 2. In the present application, sodium lauryl sulfate is an anionic surfactant, and fatty alcohol polyoxyethylene ether is a nonionic surfactant. Sodium lauryl sulfate and fatty alcohol polyoxyethylene ether are compounded according to a mass ratio so that there is a synergistic effect between the two, which can effectively reduce the surface tension of the soluble solution, thereby facilitating the uniform dispersion of benzylamine gibberellic acid and improving the stability of the soluble solution.

[0025] 3. In the present application, toluene is used as a porogen, divinylbenzene is used as a cross-linking agent, and styrene is cross-linked with maleic anhydride to obtain polystyrene porous microspheres. The prepared polystyrene porous microspheres have large pores, good hydrophilicity, good dispersibility in soluble solvents, and a large specific surface area, which can effectively adsorb benzylamine and gibberellic acid. DETAILED DESCRIPTION

[0026] The present application is further described in detail below in conjunction with embodiments.

[0027] Preparation Example 1-8 of Stabilizer Preparation Example 1 The preparation method of polystyrene porous microspheres comprises the following steps: 11.6g of styrene, 1.9g of divinylbenzene, 0.75g of azobisisobutyronitrile and 1.16g of toluene are uniformly mixed, the mixture is heated to 45°C, maleic anhydride is added in an amount of 20wt% of styrene, 18mL of 2wt% polyvinyl alcohol solution and 125mL of water are added while stirring, the mixture is heated to 70°C until the reaction is completed, suction filtration is performed, hot water washing is performed for 3 times, and drying is performed to obtain polystyrene porous microspheres.

[0028] Preparation Example 2 The preparation method of polystyrene porous microspheres comprises the following steps: 12.8g of styrene, 2.2g of divinylbenzene, 0.93g of azobisisobutyronitrile and 1.28g of toluene are uniformly mixed, the mixture is heated to 50°C, maleic anhydride is added in an amount of 23wt% of styrene, 20mL of 1.5wt% polyvinyl alcohol solution and 130mL of water are added while stirring, the mixture is heated to 75°C until the reaction is completed, suction filtration, hot water washing for 3 times and drying to obtain polystyrene porous microspheres.

[0029] Preparation Example 3 The difference between Preparation Example 3 and Preparation Example 1 is that the amount of maleic anhydride added is 10 wt % of styrene.

[0030] Preparation Example 4 The difference between Preparation Example 4 and Preparation Example 1 is that the amount of maleic anhydride added is 30 wt % of styrene.

[0031] Preparation Example 5 The difference between Preparation Example 5 and Preparation Example 1 is that the polystyrene porous microspheres are further treated as follows: 2.5 g of polystyrene porous microspheres are added to 30 mL of 70 wt% ethanol aqueous solution, and ultrasonically dispersed to obtain a mixed solution; 1 g of styrene, 0.5 g of sodium styrene sulfonate and 0.04 g of azobisisobutyronitrile are dissolved in 30 mL of 70 wt% ethanol aqueous solution and ultrasonically dispersed, and then mixed with the mixed solution. After ultrasonic dispersion, the mixture is heated to 35° C. and swelled for 11 h, nitrogen is introduced, and the mixture is heated to 75° C. and stirred for 23 h under nitrogen protection, centrifuged, separated, and dried to obtain sulfonated polystyrene porous microspheres.

[0032] Preparation Example 6 The difference between Preparation Example 6 and Preparation Example 1 is that the polystyrene porous microspheres are further treated as follows: 3 g of polystyrene porous microspheres are added to 35 mL of 65 wt% ethanol aqueous solution, and ultrasonically dispersed to obtain a mixed solution; 1.2 g of styrene, 0.6 g of sodium styrene sulfonate and 0.05 g of azobisisobutyronitrile are dissolved in 25 mL of 65 wt% ethanol aqueous solution and ultrasonically dispersed, and then mixed with the mixed solution. After ultrasonic dispersion, the mixture is heated to 30°C and swelled for 12 h, nitrogen is introduced, and the mixture is heated to 70°C, stirred and reacted under nitrogen protection for 24 h, centrifuged, separated, and dried to obtain sulfonated polystyrene porous microspheres.

[0033] Preparation Example 7 The difference between Preparation Example 7 and Preparation Example 5 is that the sulfonated polystyrene porous microspheres are further treated as follows: 1 g of sulfonated polystyrene porous microspheres, 50 mL of dichloromethane, and 8 g of anhydrous aluminum chloride are mixed, magnetically stirred for 11 hours, reacted at 75°C for 11 hours, centrifuged, filtered, and washed, and then immersed in a mixed solution of 100 mL of hydrochloric acid, deionized water, and acetone for 24 hours, the mass ratio of hydrochloric acid, deionized water, and acetone being 5:3:2, extracted, and dried.

[0034] Preparation Example 8 The difference between Preparation Example 8 and Preparation Example 5 is that the sulfonated polystyrene porous microspheres are further treated as follows: 1.2 g of sulfonated polystyrene porous microspheres, 54 mL of dichloromethane, and 8.9 g of anhydrous aluminum chloride are mixed, magnetically stirred for 12 h, reacted at 70 ° C for 12 h, centrifuged, filtered, and washed, and then immersed in a mixed solution of 110 mL of hydrochloric acid, deionized water and acetone for 24 h, the mass ratio of hydrochloric acid, deionized water and acetone being 5.2:3.1:2.3, extracted, and dried. Example

[0035] Example 1 A benzylamine·gibberellic acid soluble solution comprises the following raw materials in percentage by mass: 3.5% of a benzylamine·gibberellic acid composite agent, 4.5% of a composite surfactant, 0.5% of a stabilizer, 20% of an organic solvent, and the remainder being water, wherein the mass ratio of benzylamine to gibberellic acid in the benzylamine·gibberellic acid composite agent is 1:2.9, the composite surfactant comprises sodium dodecyl sulfate and fatty alcohol polyoxyethylene ether in a mass ratio of 1.02:0.98, the stabilizer is the stabilizer prepared in Preparation Example 1, and the organic solvent is anhydrous ethanol.

[0036] The preparation method of the above-mentioned benzylamine·gibberellic acid soluble solution comprises the following steps: mixing the benzylamine·gibberellic acid composite agent, a surfactant, a stabilizer, an organic solvent and water at a rotation speed of 1500r / min and a stirring time of 20min to obtain the benzylamine·gibberellic acid soluble solution.

[0037] Example 2 A benzylamine·gibberellic acid soluble solution comprises the following raw materials in percentage by mass: 4.2% benzylamine·gibberellic acid composite agent, 8.9% composite surfactant, 0.8% stabilizer, 25% organic solvent, and water as the balance, wherein the mass ratio of benzylamine to gibberellic acid in the benzylamine·gibberellic acid composite agent is 1.2:3.2, the composite surfactant comprises sodium dodecyl sulfate and fatty alcohol polyoxyethylene ether in a mass ratio of 1.16:1.17, the stabilizer is the stabilizer prepared in Preparation Example 2, and the organic solvent is anhydrous ethanol.

[0038] The preparation method of the above-mentioned benzylamine·gibberellic acid soluble solution comprises the following steps: mixing the benzylamine·gibberellic acid composite agent, a surfactant, a stabilizer, an organic solvent and water at a rotation speed of 1800r / min and a stirring time of 15min to obtain the benzylamine·gibberellic acid soluble solution.

[0039] Example 3 The difference between Example 3 and Example 1 is that the mass ratio of benzylamine to gibberellic acid in the benzylamine·gibberellic acid composite agent is 0.5:3.2.

[0040] Example 4 The difference between Example 4 and Example 1 is that the mass ratio of benzylamine to gibberellic acid in the benzylamine·gibberellic acid composite agent is 2:3.2.

[0041] Example 5 The difference between Example 5 and Example 1 is that the composite surfactant includes sodium lauryl sulfate and fatty alcohol polyoxyethylene ether in a mass ratio of 0.5:1.17.

[0042] Example 6 The difference between Example 6 and Example 1 is that the composite surfactant includes sodium lauryl sulfate and fatty alcohol polyoxyethylene ether in a mass ratio of 2:1.17.

[0043] Example 7 The difference between Example 7 and Example 1 is that in Example 7, the stabilizer is the stabilizer prepared in Preparation Example 3.

[0044] Example 8 The difference between Example 8 and Example 1 is that in Example 8, the stabilizer is the stabilizer prepared in Preparation Example 4.

[0045] Example 9 The difference between Example 9 and Example 1 is that in Example 9, the stabilizer is the stabilizer prepared in Preparation Example 5.

[0046] Example 10 The difference between Example 10 and Example 1 is that in Example 10, the stabilizer is the stabilizer prepared in Preparation Example 6.

[0047] Embodiment 11 The difference between Example 11 and Example 1 is that in Example 11, the stabilizer is the stabilizer prepared in Preparation Example 7.

[0048] Example 12 The difference between Example 12 and Example 1 is that in Example 12, the stabilizer is the stabilizer prepared in Preparation Example 8.

[0049] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that in Comparative Example 1, the addition amount of the composite surfactant is 3%.

[0050] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that in Comparative Example 2, the added amount of the composite surfactant is 12%.

[0051] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that in Comparative Example 3, the added amount of the stabilizer is 0.1%.

[0052] Comparative Example 4 The difference between Comparative Example 4 and Example 1 is that in Comparative Example 4, the added amount of the stabilizer is 1.5%.

[0053] Test methods 1. Stability test: According to the raw materials and preparation methods of Examples 1-12 and Comparative Examples 1-4, benzylamine·gibberellic acid soluble preparations were prepared. Three equal portions of each benzylamine·gibberellic acid soluble preparation were taken and set as a group. The initial active ingredient concentration was detected. The samples were sealed and stored at 54°C ± 2°C for 14 days. On 3 days, 8 days, and 14 days, one portion from the same group was taken out respectively, and 1 / 2 of one portion was taken for active ingredient concentration detection. The percentage decrease in the content of the active ingredient was calculated and recorded in Table 1. The calculation formula is as follows: (initial active ingredient concentration-active ingredient concentration after hot storage for 3d / 8d / 14d) / initial active ingredient concentration×100%, and the remaining 1 / 2 was subjected to a dilution stability test. The dilution multiple was 20 times. The dilution solution was uniform and no precipitate was recorded as qualified, otherwise it was unqualified, and the observation results were recorded in Table 1.

[0054] Table 1 Stability of soluble solution 2. Field efficacy test: The benzylamine·gibberellic acid soluble solution prepared in Examples 1-12 of the present invention and Comparative Examples 1-4 was used for field efficacy test of corn growth regulation. The corn variety selected was Zhenghong 505, and clear water was used as a blank control group. 200 g was used per mu. The test was carried out in accordance with the "Guidelines for Field Tests of Pesticide Efficacy". The growth of corn was investigated 60 days after the application of the drug, the yield increase rate of corn was calculated, and the results were recorded in Table 2.

[0055] Table 2 Field efficacy test of soluble solution project Yield increase rate / % Example 1 20.5 Example 2 20.1 Example 3 16.5 Example 4 15.4 Example 5 15.6 Example 6 16.2 Example 7 14.6 Example 8 15.1 Example 9 22.0 Example 10 21.8 Embodiment 11 23.9 Example 12 23.6 Comparative Example 1 13.9 Comparative Example 2 14.2 Comparative Example 3 12.3 Comparative Example 4 12.8 According to Table 1, Examples 1-2 and Comparative Examples 1-4, it can be seen that compared with Comparative Examples 1-4, after 14 days of hot storage, the decomposition degree of benzylamine·gibberellic acid as an active ingredient in Example 1-2 is lower and the dilution stability is better, and the yield increase rate is higher, indicating that the benzylamine·gibberellic acid soluble agent prepared in Example 1-2 has good hot storage stability, dilution stability and yield increase effect. In Example 1-2, a compound surfactant and a stabilizer are added, and the compound surfactant is compounded by sodium dodecyl sulfate and fatty alcohol polyoxyethylene ether in a certain mass ratio, and the stabilizer is polystyrene porous microspheres, indicating that the addition of the compound surfactant and the stabilizer can enhance the stability of the benzylamine·gibberellic acid soluble agent, thereby effectively improving the application effect of the benzylamine·gibberellic acid soluble agent.

[0056] The heat storage stability, dilution stability and yield increase rate of the benzylamine·gibberellic acid soluble concentrate prepared in Comparative Example 1-2 are lower than those in Example 1-2, indicating that the amount of compound surfactant added affects the stability and application effect of the benzylamine·gibberellic acid soluble concentrate. The compound surfactant is compounded by sodium dodecyl sulfate and fatty alcohol polyoxyethylene ether in a certain mass ratio, which can effectively reduce the surface tension of the benzylamine·gibberellic acid soluble concentrate, thereby helping to improve the dispersibility of benzylamine·gibberellic acid and stabilizer, and further helping to improve the stability of benzylamine·gibberellic acid and stabilizer. Increasing or decreasing the amount of compound surfactant added can easily affect the effectiveness of the compound surfactant, thereby affecting the stability of the benzylamine·gibberellic acid soluble concentrate.

[0057] The heat storage stability, dilution stability and yield increase rate of the benzylamine·gibberellic acid soluble solution prepared in Comparative Examples 3-4 are all lower than those in Examples 1-2, indicating that the amount of stabilizer added affects the stability and application effect of the benzylamine·gibberellic acid soluble solution. The stabilizer is polystyrene porous microspheres, toluene is used as a porogen, and styrene and maleic anhydride are cross-linked to obtain polystyrene porous microspheres, which have large pores and good hydrophilicity and can be evenly dispersed in the soluble solution. At the same time, the large specific surface area makes the polystyrene porous microspheres have good adsorption properties, which can adsorb benzylamine and gibberellic acid, thereby effectively protecting benzylamine and gibberellic acid. When the amount of stabilizer added is too little, the stabilizing effect of the stabilizer on benzylamine and gibberellic acid is poor. When the amount of stabilizer added is too much, the polystyrene porous microspheres are prone to agglomeration, which reduces the dispersibility, thereby affecting the effectiveness of the stabilizer.

[0058] Compared with Example 1, the yield increase rate of the benzylamine·gibberellic acid soluble concentrate prepared in Example 3-4 is lower than that in Example 1, indicating that the mass ratio of benzylamine and gibberellic acid in the benzylamine·gibberellic acid composite agent affects the stability and application effect of the benzylamine·gibberellic acid soluble concentrate, and there is a synergistic effect between benzylamine and gibberellic acid. The mass ratio of benzylamine and gibberellic acid affects the synergistic effect of benzylamine and gibberellic acid. Example 3-4 adjusts the mass ratio of benzylamine and gibberellic acid, so that the synergistic effect of benzylamine and gibberellic acid is weakened, thereby reducing the yield increase rate.

[0059] Compared with Example 1, the heat storage stability, dilution stability and yield increase rate of the benzylamine·gibberellic acid soluble concentrate prepared in Example 5-6 are lower than those in Example 1, indicating that the mass ratio of sodium dodecyl sulfate and fatty alcohol polyoxyethylene ether in the compound surfactant affects the stability and application effect of the benzylamine·gibberellic acid soluble concentrate, and there is a synergistic effect between sodium dodecyl sulfate and fatty alcohol polyoxyethylene ether. The compound surfactant prepared by compounding can effectively reduce the surface tension of the soluble concentrate, which is beneficial to the uniform dispersion of benzylamine and gibberellic acid, and further helps to improve the stability of the soluble concentrate. In Example 5-6, the mass ratio of sodium dodecyl sulfate and fatty alcohol polyoxyethylene ether was changed, so that the effect of the compound surfactant was weakened, thereby reducing the stability of the benzylamine·gibberellic acid soluble concentrate.

[0060] Compared with Example 1, the heat storage stability, dilution stability and yield increase rate of the benzylamine·gibberellic acid soluble solution prepared in Example 7-8 are all decreased compared with Example 1, indicating that when preparing the polystyrene porous microspheres as a stabilizer, the amount of maleic anhydride added will affect the effectiveness of the stabilizer. Maleic anhydride has good hydrophilicity. Adding maleic anhydride to the polystyrene porous microspheres can effectively improve the hydrophilicity of the polystyrene porous microspheres, thereby facilitating the polystyrene porous microspheres in the benzylamine·gibberellic acid soluble solution. When the amount of maleic anhydride added is too little, the hydrophilicity of the polystyrene porous microspheres decreases, and the dispersion is uneven, which in turn affects the stability of the benzylamine·gibberellic acid soluble solution. The addition of maleic anhydride will reduce the specific surface area of ​​the polystyrene porous microspheres, causing the adsorption performance of the polystyrene porous microspheres to decrease. When the amount of maleic anhydride added is too much, the adsorption performance of the polystyrene porous microspheres will easily decrease too much, reducing the protective effect of benzylamine·gibberellic acid, thereby affecting the application effect of the benzylamine·gibberellic acid soluble solution.

[0061] Compared with Example 1, the heat storage stability, dilution stability and yield increase rate of the benzylamine·gibberellic acid soluble concentrate prepared in Examples 9-10 are improved compared with those in Example 1, indicating that the effectiveness of the stabilizer can be improved by sulfonation treatment of the polystyrene porous microspheres used as a stabilizer during preparation. Sulfonic acid groups are introduced into the sulfonated polystyrene porous microspheres, and the sulfonic acid groups are negatively charged when ionized, and can adsorb positively charged benzylamine·gibberellic acid through electrostatic action, which is beneficial to improving the adsorption effect of the stabilizer on benzylamine and gibberellic acid, thereby helping to improve the stability and application effect of the benzylamine·gibberellic acid soluble concentrate.

[0062] Compared with Example 1, the heat storage stability, dilution stability and yield increase rate of the benzylamine·gibberellic acid soluble solution prepared in Examples 11-12 are improved compared with those in Example 11, indicating that the sulfonated polystyrene porous microspheres can further improve the effectiveness of the stabilizer after hyper-crosslinking treatment. After the sulfonated polystyrene porous microspheres are swollen, a bridging structure is introduced between the polystyrene molecular chains to form a large number of micropores and mesopores, which effectively increases the specific surface area of ​​the sulfonated polystyrene porous microspheres, thereby enhancing the adsorption performance of the sulfonated polystyrene porous microspheres, and further improving the stability and application effect of the benzylamine·gibberellic acid soluble solution.

[0063] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A benzylamine gibberellic acid soluble solution, characterized in that: The invention comprises the following raw materials in percentage by weight: 3.5-4.2% of a compound agent of benzylamine and gibberellic acid, 4.5-8.9% of a compound surfactant, 0.5-0.8% of a stabilizer, 20-25% of an organic solvent and the remainder of water.

2. A benzylamine gibberellic acid soluble solution according to claim 1, characterized in that: The mass ratio of benzylamine to gibberellic acid in the benzylamine·gibberellic acid composite agent is (1-1.2):(2.9-3.2).

3. A benzylamine gibberellic acid soluble solution according to claim 1, characterized in that: The composite surfactant comprises sodium lauryl sulfate and fatty alcohol polyoxyethylene ether in a mass ratio of (1.02-1.16):(0.98-1.17).

4. A benzylamine-gibberellic acid soluble solution according to claim 1, characterized in that: The stabilizer is polystyrene porous microspheres.

5. A benzylamine-gibberellic acid soluble solution according to claim 4, characterized in that: The preparation method of the polystyrene porous microspheres, The method comprises the following steps: uniformly mixing styrene, divinylbenzene, azobisisobutyronitrile and toluene, heating to 45-50 DEG C, adding maleic anhydride, adding polyvinyl alcohol solution and water while stirring, heating to 70-75 DEG C until the reaction is finished, filtering, washing and drying to obtain polystyrene porous microspheres.

6. A benzylamine-gibberellic acid soluble solution according to claim 5, characterized in that: The amount of maleic anhydride added is 20-23 wt % of styrene.

7. A benzylamine-gibberellic acid soluble solution according to claim 5, characterized in that: The polystyrene porous microspheres are treated as follows: adding the polystyrene porous microspheres to an ethanol aqueous solution, uniformly dispersing by ultrasonication to obtain a mixed solution, dissolving styrene, sodium styrene sulfonate and azobisisobutyronitrile in the ethanol aqueous solution, uniformly dispersing by ultrasonication, and then mixing with the mixed solution, uniformly dispersing by ultrasonication, heating to 30-35° C. to swell for 11-12 hours, introducing nitrogen, heating to 70-75° C., stirring and reacting under nitrogen protection for 23-24 hours, centrifuging, separating and drying to obtain the sulfonated polystyrene porous microspheres.

8. A benzylamine-gibberellic acid soluble solution according to claim 7, characterized in that: The sulfonated polystyrene porous microspheres are treated as follows: sulfonated polystyrene porous microspheres, dichloromethane and anhydrous aluminum chloride are mixed, magnetically stirred for 11-12 hours, reacted at 70-75° C. for 11-12 hours, centrifuged, filtered and washed, and then immersed in a mixed solution of hydrochloric acid, deionized water and acetone for 24 hours, extracted and dried.

9. The method for preparing a benzylamine-gibberellic acid soluble solution according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: mixing a benzylamine·gibberellic acid composite agent, a surfactant, a stabilizer, an organic solvent and water at a rotation speed of 1500-1800 r / min and a stirring time of 15-20 min to prepare a benzylamine·gibberellic acid soluble solution.

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