Bird repellent based on plant extracts

Abstract

The invention relates to a bird repellent based on plant extracts, and belongs to the technical field of biological prevention and control of infrastructure. The bird repellent is prepared from plant active ingredients, a plastic slow-release carrier and an auxiliary agent, wherein the plant active ingredients comprise methyl anthranilate, cinnamyl aldehyde, eucalyptus oil and peppermint essential oil; the auxiliary agent comprises an antioxidant, an antifreeze agent and a solvent composed of vegetable oil and methyl oleate. The bird repellent is prepared by mixing through a specific preparation method, and can be prepared into various dosage forms such as a colloidal mixture or foamable liquid and the like. Through the synergistic effect of various plant active components and the controlled release function of the plastic slow-release carrier, the invention aims to provide the bird repellent which is wide in bird repelling spectrum, long in effective action time, high in environmental adaptability and safe to use, and is mainly used for protecting electrical equipment and agricultural crops from being invaded and harassed by birds.

Description

Technical Field

[0001] This invention relates to the field of biological control of infrastructure, and more specifically, to a bird repellent based on plant extracts. Background Technology

[0002] Birds often cause significant impacts on agricultural production and power facilities during their foraging, roosting, or nesting activities, making the development of bird control technologies of great practical importance. Among various bird control methods, plant-based bird repellents have become an important area of ​​development due to their environmental friendliness and relative safety for birds.

[0003] Existing plant-based bird repellents still have several significant shortcomings. First, many bird repellent formulations are relatively simple, relying on only a few essential oils with known scents, resulting in a narrow bird repellency spectrum. Furthermore, birds easily develop adaptability, and the repellency effect rapidly diminishes over time. Second, existing formulations generally lack effective sustained-release mechanisms; volatile active ingredients dissipate rapidly in the environment, making it difficult to maintain long-term effective repellency concentrations in protected areas, leading to frequent reapplication and increasing costs and labor intensity. Third, some formulations introduce excessively irritating chemicals in pursuit of effectiveness. While these may repel birds, they may pose potential risks to operators and the surrounding environment, failing to fully realize the safety advantages of plant-based products. In addition, existing technologies do not adequately consider the physical properties of the formulation, such as adhesion, weather resistance (e.g., resistance to rain erosion and UV degradation), and stability at different temperatures, limiting their reliable application in complex outdoor environments. Finally, most existing solutions fail to systematically consider the synergistic effects between different active ingredients, and their formulations lack scientific basis, affecting the optimization of product efficacy.

[0004] Therefore, a bird repellent based on plant extracts is proposed to address the above-mentioned problems and improve the shortcomings of the existing technology. The main issues include: how to effectively expand the bird repellent spectrum and delay the adaptation of birds; how to significantly prolong the effective action time of the bird repellent outdoors; how to improve the physical stability and persistence of the bird repellent under different environmental conditions; and how to achieve a stable and efficient repellency effect while ensuring environmental safety. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, embodiments of the present invention provide a bird repellent based on plant extracts to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a bird repellent based on plant extracts, comprising plant active ingredients, a sustained-release carrier, and excipients; wherein the plant active ingredients include methyl anthranilate, cinnamaldehyde, eucalyptus oil, and peppermint oil; the sustained-release carrier is a plastic sustained-release carrier; the excipients include antioxidants, antifreeze agents, and solvents; based on the total mass of the bird repellent, the content of each component is as follows: methyl anthranilate 1% to 15%, cinnamaldehyde 0.5% to 5%, eucalyptus oil 1% to 10%, peppermint oil 0.5% to 8%, plastic sustained-release carrier 25% to 40%, antioxidant 0.02% to 0.5%, antifreeze agent 1% to 3%, and solvent 22% to 40%.

[0007] Preferably, the plant active ingredients further include at least one selected from houttuynia cordata essential oil, neem bark extract, camphor oil and rose oil; and based on the total mass of the bird repellent, the content of houttuynia cordata essential oil is 0.1% to 5%, the content of neem bark extract is 1% to 8%, the content of camphor oil is 1% to 10%, and the content of rose oil is 0.5% to 5%.

[0008] Preferably, the plastic sustained-release carrier is composed of polyisobutylene, an oil-swellable material, and a tackifier; wherein the oil-swellable material is a copolymer obtained by emulsion polymerization of butyl acrylate, methyl methacrylate, and hydroxyethyl methacrylate; the tackifier is sodium polyacrylate or anionic polyacrylamide; based on the total mass of the plastic sustained-release carrier, the content of polyisobutylene is 0.1% to 0.3%, the content of the oil-swellable material is 0.5% to 3%, and the content of the tackifier is 0.1% to 0.5%.

[0009] Preferably, the solvent is a mixture of vegetable oil and methyl oleate; wherein the vegetable oil is selected from at least one of soybean oil, castor oil, peanut oil and olive oil; and the content of the vegetable oil and the content of the methyl oleate are 40% to 60% based on the total mass of the solvent.

[0010] Preferably, the agent further includes a surfactant and a viscosity modifier; the surfactant is at least one of sodium fatty acid methyl ester sulfonate, Tween-80, and polyoxyethylene monolaurate; the viscosity modifier is at least one of nonionic polyacrylamide, polyethylene glycol distearate, and oil-soluble cellulose; the content of the surfactant is 2% to 10% and the content of the viscosity modifier is 0.5% to 3% based on the total mass of the bird repellent.

[0011] Preferably, it is prepared by a method comprising the following steps: S1: Methyl anthranilate, cinnamaldehyde, eucalyptus oil, peppermint oil and solvent are mixed for the first time at a stirring rate of 30 to 60 rpm to obtain a first mixture; S2: The first mixture, the plastic slow-release carrier, the antioxidant, and the antifreeze are mixed again at a temperature of 40 degrees Celsius to 70 degrees Celsius to obtain a second mixture; S3: Cool the second mixture to room temperature to obtain the bird repellent.

[0012] Preferably, after step S3, the method further includes step S4: adding a surfactant and a viscosity modifier for a fourth mixing to obtain a bird repellent containing a surfactant and a viscosity modifier; wherein the surfactant is at least one of sodium fatty acid methyl ester sulfonate, Tween-80, and polyoxyethylene monolaurate, and the viscosity modifier is at least one of nonionic polyacrylamide, polyethylene glycol distearate, and oil-soluble cellulose; based on the total mass of the bird repellent, the content of the surfactant is 2% to 10%, and the content of the viscosity modifier is 0.5% to 3%.

[0013] Preferably, in step S1, the solvent is first preheated to 35 to 45 degrees Celsius, then the methyl anthranilate, cinnamaldehyde, eucalyptus oil and peppermint oil are added, and the mixture is stirred and mixed for 20 to 40 minutes under inert gas protection.

[0014] Preferably, the formulation is a colloidal mixture containing the plant active ingredient, the plastic sustained-release carrier, the emulsion stabilizer, and water; the content of the emulsion stabilizer is 0.5% to 2% and the content of water is 10% to 25% by weight of the total mass of the colloidal mixture.

[0015] Preferably, it is used to protect electrical equipment or agricultural crops; when used on electrical equipment, it is coated or encapsulated on the non-energized parts of the electrical equipment; when used on agricultural crops, it is applied to the crop growing area by spraying or hanging.

[0016] The technical effects and advantages of this invention are as follows: Compared to existing technologies, this invention employs a compound of multiple plant-based active ingredients, including methyl anthranilate, cinnamaldehyde, eucalyptus oil, and peppermint oil. These ingredients act on multiple olfactory sensory channels in birds, collectively creating a complex and persistent odor environment that interferes with birds' sensory judgment, effectively expanding the range of bird species repelled and significantly reducing the probability of birds adapting to a single odor. This provides a broader and longer-lasting repellent effect, and the synergistic effect of multiple natural ingredients enhances the reliability and universality of bird repellency.

[0017] Compared to existing technologies, this invention introduces a plastic slow-release carrier system composed of polyisobutylene, oil-swellable materials, and a thickener. This carrier can effectively encapsulate and immobilize plant active ingredients, and through its unique network structure, it physically inhibits the migration and release of active molecules. This slows down the volatilization rate of active ingredients, preventing them from dissipating too quickly in the initial stage, and ensuring a longer effective repellency concentration period within the target area. Through this physical slow-release mechanism, the effective period of a single application is significantly extended, the application frequency is reduced, and the performance stability of the product under different temperature conditions is improved.

[0018] Compared to existing technologies, this invention designs the solvent as a specific mixture of vegetable oil and methyl oleate, with optional addition of surfactants and viscosity modifiers. This combination optimizes the overall compatibility and rheological properties of the bird repellent, resulting in better adhesion and spreadability when applied to various surfaces. This film, combined with a slow-release carrier, better resists rain and wind erosion, while the vegetable oil component itself acts as an auxiliary retention matrix for the active ingredients, enhancing the bird repellent's tolerance and retention under complex outdoor climatic conditions and ensuring sustained repellency.

[0019] Compared to existing technologies, this invention provides a variety of adaptable formulations, including colloidal compounds and foaming liquids. The colloidal compounds, by incorporating water and emulsion stabilizers, improve the product's environmental compatibility and ease of application. The foaming liquid formulation, combined with bubble generation technology, enables the active ingredients to be widely covered over large areas or complex geometric surfaces, achieving efficient delivery and distribution of bird-repelling active ingredients. Its advantage lies in meeting the differentiated needs of various application scenarios, such as precise coating of power equipment and large-scale protection in agriculture, through diversified formulation design. Attached Figure Description

[0020] Figure 1 This is a schematic diagram illustrating the synergistic effect of the plant-based active ingredients in this invention.

[0021] Figure 2 This is a schematic diagram of the sustained-release carrier and preparation process of the present invention.

[0022] Figure 3 This is a schematic diagram illustrating the dosage form and application scenarios of the present invention. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] As attached Figures 1 to 3 The bird repellent based on plant extracts shown is implemented as follows: Example 1: Preparation and implementation of the basic bird repellent formulation Formula composition: (based on the total mass of 1000 grams of bird repellent) Plant-based active ingredients: methyl anthranilate 80g (8%), cinnamaldehyde 25g (2.5%), eucalyptus oil 60g (6%), peppermint oil 40g (4%).

[0025] Plastic sustained-release carrier: 2.5 g (0.25%) of polyisobutylene, 20 g (2%) of oil-swellable material (butyl acrylate-methyl methacrylate-hydroxyethyl methacrylate copolymer), and 3 g (0.3%) of sodium polyacrylate tackifier.

[0026] Additives: 1.5 g (0.15%) of antioxidant tert-butylhydroquinone and 20 g (2%) of antifreeze propylene glycol.

[0027] Solvents: 300g soybean oil, 100g castor oil, 348g methyl oleate (total 748g, 74.8%).

[0028] Preparation process: First, the oil-swellable material is pre-prepared: butyl acrylate, methyl methacrylate and hydroxyethyl methacrylate are added to the reactor in a mass ratio of 5:3:2. Potassium persulfate is used as an initiator, and the emulsion polymerization reaction is carried out at 75°C for 2 hours to obtain the desired copolymer emulsion. After spray drying, a white powder is obtained for later use.

[0029] The specific preparation steps for bird repellent are as follows: S1: Place the soybean oil, castor oil and methyl oleate of the formula into a mixing container, preheat to 40°C and maintain the temperature, add methyl anthranilate, cinnamaldehyde, eucalyptus oil and peppermint oil in sequence under nitrogen protection, and mechanically stir at a speed of 45 rpm for 35 minutes to obtain a uniform and transparent first mixture. S2: Transfer the first mixture obtained in S1 to a reactor with a heating jacket, keep the temperature at 55°C, and add polyisobutylene, pre-prepared oil-swellable material powder, sodium polyacrylate, tert-butylhydroquinone and propylene glycol in sequence. Increase the stirring speed to 60 rpm and continue mixing for 50 minutes until a homogeneous and viscous second mixture is formed. S3: The second mixture is gradually cooled to room temperature of 25°C through a cooling circulation system. During this process, a slow stirring speed of 15 rpm is maintained to prevent the components from separating, and the target bird repellent product is finally obtained.

[0030] The resulting bird repellent is a brownish-yellow, semi-transparent, viscous liquid with a characteristic complex plant odor. When applied to non-energized parts of the transformer casing, it forms a coating approximately 0.5 mm thick, continuously releasing bird-repelling active ingredients for over four weeks in outdoor environments. When used in farmland, mixing 50 grams of the product with 1000 grams of water and spraying it shows a significant repellent effect against common pests such as sparrows and magpies.

[0031] Example 2: Preparation and Implementation of Enhanced Bird Repellent Formulation Formula composition: (Based on Example 1, the plant active ingredient system is enhanced and the content of each component is adjusted).

[0032] Basic plant active ingredients: methyl anthranilate 100g (10%), cinnamaldehyde 30g (3%), eucalyptus oil 70g (7%), peppermint oil 50g (5%).

[0033] Supplement with plant-based active ingredients: 20g of houttuynia cordata essential oil (2%) and 40g of neem bark extract (4%).

[0034] The composition of the plastic sustained-release carrier remains unchanged, but the total amount is increased to 300 grams (30%).

[0035] The following additives have been added: 60g (6%) of sodium methyl ester sulfonate surfactant and 15g (1.5%) of nonionic polyacrylamide viscosity modifier.

[0036] The solvent was adjusted to: 200g peanut oil, 150g olive oil, and 215g methyl oleate (total 565g, 56.5%).

[0037] Preparation process: S1: Preheat peanut oil, olive oil and methyl oleate to 38°C. Under inert gas protection, first add the basic plant active ingredients and stir for 20 minutes. Then add houttuynia cordata essential oil and neem bark extract and continue stirring at 50 rpm for 40 minutes to obtain the first mixture. S2: Raise the temperature of the first mixture to 60°C, add all the plastic slow-release carrier components, antioxidant and antifreeze in sequence, and stir at 65 rpm for 45 minutes to ensure that the oil-swellable material is fully dispersed and swollen; S3: After the mixture is cooled to 28°C, sodium fatty acid methyl ester sulfonate and nonionic polyacrylamide are added, and the mixture is stirred at 30 rpm for 25 minutes to ensure thorough mixing and obtain an enhanced bird repellent.

[0038] This embodiment features a significantly increased product viscosity, making it suitable for manufacturing bird-repellent tape. The product is evenly coated onto a polyethylene substrate at a coverage of approximately 80 grams per square meter. After curing at room temperature, it forms a bird-repellent tape with durable adhesion. Hanging this tape in the canopy of orchard trees effectively repels various fruit-eating birds and exhibits good resistance to rain washout.

[0039] Example 3: Preparation and Implementation of Colloidal Compound Dosage Form Formulation composition: (Based on the formulation of Example 1, a colloidal compound dosage form was prepared) All plant active ingredients in Example 1 were retained; the amount of plastic sustained-release carrier was adjusted to 200 g (20%); 15 g (1.5%) of sodium octenyl succinate starch was added as an emulsifying stabilizer; 250 g (25%) of deionized water was added; and the amount of solvent was reduced accordingly to 454.5 g (45.45%).

[0040] Preparation process: S1: Prepare the first mixture according to the method of Example 1; S2: Mix the first mixture with the plastic slow-release carrier, antioxidant, and antifreeze at 50°C for 30 minutes; S3: Prepare a 10% aqueous solution of sodium octenyl succinate starch and deionized water in advance, and slowly add it to the second mixture at 45°C. At the same time, increase the stirring speed to 800 rpm for high-shear emulsification for 30 minutes. S4: Quickly cool the resulting emulsion to below 30°C to obtain a milky white colloidal mixture.

[0041] This colloidal mixture has good water dispersibility and spraying performance, and can be applied using conventional agricultural spraying equipment. When used for rice paddy protection, take 100 grams of this product, mix it with 50 kilograms of water, and spray it evenly on the upper part of the rice ears. It can form a long-lasting bird-repelling protective layer on the crop surface, significantly improving the repellency rate against sparrows, and is safe for crops without phytotoxicity.

[0042] Example 4: Preparation and Implementation of Foamable Liquid Formulation Formula composition: (Based on the formula of Example 2, the foaming properties are optimized) The total amount of plant active ingredients remains unchanged.

[0043] The surfactant system was adjusted as follows: 40 g (4%) of Tween-80 and 30 g (3%) of polyoxyethylene monolaurate; 10 g (1%) of lauroyl propylene glycol ester, a foaming stabilizer, was added; the amount of plastic slow-release carrier was adjusted to 250 g (25%); and the amount of solvent was adjusted appropriately to maintain the total balance. Preparation process: S1-S3: Basic bird repellents were obtained according to the preparation method in Example 2; S4: Add Tween-80, polyoxyethylene monolaurate and lauroyl propylene glycol ester, and stir at 200 rpm for 40 minutes at 40°C to obtain a homogeneous foamable liquid.

[0044] This formulation is suitable for bubble atomization delivery systems. When in use, the product is blown out at a pressure of 0.15 MPa through a dedicated bubble generator to produce stable bubbles with a diameter of 2-10 mm. These bubbles carry bird-repelling active ingredients to form a bubble mist layer covering an area of ​​20-50 square meters, which is suitable for places such as substations and airports where bird repellency is required over a large area.

[0045] Example 5: Comprehensive Application of Example Examples Application in power equipment protection: The bird repellent prepared in Example 1 is mixed with 3% fumed silica as a thixotropic agent, stirred thoroughly, and then filled into an aluminum-plastic composite pipe. When using, it is directly applied to the surface of non-energized components such as crossarms of high-voltage towers and insulator fittings, with a coating length of approximately 15 cm and a width of 2 cm. This coating maintains viscoelasticity within a temperature range of -20℃ to 60℃, retains over 85% of its weight after weathering, and provides effective protection for more than 30 days.

[0046] Agricultural crop protection application: The colloidal mixture formulation prepared in Example 3 was diluted with water at a ratio of 1:50, and 0.1% food-grade pigment was added as a marker. This solution was then evenly sprayed onto the fruit tree canopy one week before fruit ripening using a backpack sprayer. Simultaneously, porous ceramic blocks were impregnated with the enhanced bird repellent prepared in Example 2 and suspended around the perimeter of the farmland, forming a dual protection system of airspace and crop surface protection. This application method provides bird protection for high-value crops such as cherries and blueberries throughout their entire growth period, reducing fruit loss to below 5%.

[0047] The above embodiments fully demonstrate the implementation of all the technical features in the claims of this invention, including different component ratios, multiple dosage form configurations, and specific application methods, fully reflecting the technical features of this invention in terms of component synergy, sustained-release performance, dosage form diversification, and application adaptability.

[0048] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bird repellent based on plant extracts, characterized in that, The bird repellent is composed of plant-based active ingredients, a sustained-release carrier, and excipients. The plant-based active ingredients include methyl anthranilate, cinnamaldehyde, eucalyptus oil, and peppermint oil. The sustained-release carrier is a plastic sustained-release carrier. The excipients include antioxidants, antifreeze agents, and solvents. Based on the total mass of the bird repellent, the content of each component is as follows: methyl anthranilate 1% to 15%, cinnamaldehyde 0.5% to 5%, eucalyptus oil 1% to 10%, peppermint oil 0.5% to 8%, plastic sustained-release carrier 25% to 40%, antioxidant 0.02% to 0.5%, antifreeze agent 1% to 3%, and solvent 22% to 40%.

2. A bird repellent based on plant extracts as described in claim 1, characterized in that, The plant active ingredients also include at least one selected from houttuynia cordata essential oil, neem bark extract, camphor oil and rose oil; and based on the total mass of the bird repellent, the content of houttuynia cordata essential oil is 0.1% to 5%, the content of neem bark extract is 1% to 8%, the content of camphor oil is 1% to 10%, and the content of rose oil is 0.5% to 5%.

3. A bird repellent based on plant extracts as described in claim 1, characterized in that, The plastic sustained-release carrier is composed of polyisobutylene, an oil-swellable material, and a tackifier; wherein the oil-swellable material is a copolymer obtained by emulsion polymerization of butyl acrylate, methyl methacrylate, and hydroxyethyl methacrylate; the tackifier is sodium polyacrylate or anionic polyacrylamide; based on the total mass of the plastic sustained-release carrier, the content of polyisobutylene is 0.1% to 0.3%, the content of the oil-swellable material is 0.5% to 3%, and the content of the tackifier is 0.1% to 0.5%.

4. A bird repellent based on plant extracts as described in claim 1, characterized in that, The solvent is a mixture of vegetable oil and methyl oleate; wherein the vegetable oil is selected from at least one of soybean oil, castor oil, peanut oil and olive oil; and the content of the vegetable oil and the content of the methyl oleate are 40% to 60% by total mass of the solvent.

5. A bird repellent based on plant extracts as described in claim 1, characterized in that, It also includes surfactants and viscosity modifiers; the surfactant is at least one of sodium fatty acid methyl ester sulfonate, Tween-80, and polyoxyethylene monolaurate; the viscosity modifier is at least one of nonionic polyacrylamide, polyethylene glycol distearate, and oil-soluble cellulose; the content of the surfactant is 2% to 10% and the content of the viscosity modifier is 0.5% to 3% based on the total mass of the bird repellent.

6. A bird repellent based on plant extracts as described in claim 1, characterized in that, It is prepared by a method including the following steps: S1: Methyl anthranilate, cinnamaldehyde, eucalyptus oil, peppermint oil and solvent are mixed for the first time at a stirring rate of 30 to 60 rpm to obtain a first mixture; S2: The first mixture, the plastic slow-release carrier, the antioxidant, and the antifreeze are mixed again at a temperature of 40 degrees Celsius to 70 degrees Celsius to obtain a second mixture; S3: Cool the second mixture to room temperature to obtain the bird repellent.

7. A bird repellent based on plant extracts as described in claim 6, characterized in that, Following step S3, step S4 is further included: adding a surfactant and a viscosity modifier for a fourth mixing to obtain a bird repellent containing a surfactant and a viscosity modifier; wherein the surfactant is at least one of sodium fatty acid methyl ester sulfonate, Tween-80, and polyoxyethylene monolaurate, and the viscosity modifier is at least one of nonionic polyacrylamide, polyethylene glycol distearate, and oil-soluble cellulose; based on the total mass of the bird repellent, the content of the surfactant is 2% to 10%, and the content of the viscosity modifier is 0.5% to 3%.

8. A bird repellent based on plant extracts as described in claim 6 or 7, characterized in that, In step S1, the solvent is first preheated to 35 to 45 degrees Celsius, then the methyl anthranilate, cinnamaldehyde, eucalyptus oil and peppermint oil are added, and the mixture is stirred and mixed for 20 to 40 minutes under inert gas protection.

9. A bird repellent based on plant extracts as described in claim 1, characterized in that, The product is configured as a colloidal compound dosage form, the colloidal compound comprising the plant active ingredient, the plastic sustained-release carrier, the emulsion stabilizer, and water; the content of the emulsion stabilizer is 0.5% to 2% and the content of water is 10% to 25% by weight of the total mass of the colloidal compound.

10. A bird repellent based on plant extracts as described in claim 1, characterized in that, Used to protect electrical equipment or agricultural crops; when used on electrical equipment, it is coated or encapsulated on the non-energized parts of the electrical equipment; when used on agricultural crops, it is applied to the crop growing area by spraying or hanging.

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