A long-lasting antimold and insecticide and a method for preparing the same

Abstract

This invention relates to the field of pest and fungal control technology, and discloses a long-lasting anti-mold insecticide and its preparation method. The long-lasting anti-mold insecticide provided by this invention comprises, by weight, the following raw materials: 50-60 parts of latex paint emulsion, 5.5-15 parts of an insecticidal microcapsule composition, 1-3 parts of an anti-mold agent, 0.002-0.5 parts of an attractant, 1-3 parts of an accelerator, 1-3 parts of a coupling agent, 1-2 parts of a wetting agent, 1-3 parts of a thickener, 0.5-2 parts of an antifoaming agent, and 1-3 parts of a filler; the insecticidal microcapsule composition includes adult insecticidal microcapsules, larval insecticidal microcapsules, and bacterial microcapsules. The long-lasting anti-mold insecticide provided by this invention has significant anti-mold and insecticidal effects, effectively solving the problem of simultaneous tobacco beetle breeding and fungal contamination, extending the service life of the substrate, and providing a long-lasting, safe, and environmentally friendly anti-mold and insecticidal solution.

Description

Technical Field

[0001] This invention relates to the field of pest and fungal control technology, specifically to a long-lasting antifungal insecticide and its preparation method. Background Technology

[0002] The tobacco beetle is a globally distributed storage pest, primarily affecting stored foods such as tobacco, spices, and dried fruits. From the perspective of infestation origin, it can be divided into endogenous and exogenous infestations. Endogenous infestations refer to tobacco beetles that prefer to accumulate in areas with specific temperatures, humidity, and dust accumulation on materials. They have a short reproductive cycle, spread rapidly, and their larvae exhibit significant biting behavior towards tobacco materials, while adults reproduce quickly. Exogenous infestations, on the other hand, refer to insect eggs that are difficult to completely eliminate from materials before opening the packaging, allowing them to reproduce and spread again during cigarette processing. Due to the long-term irrational use of chemical fumigants, coupled with the small size, short developmental period, and high reproductive rate of the tobacco beetle, its resistance to pesticides has significantly increased in recent years, leading to increased pesticide usage in control efforts and posing risks to workplace safety and environmental pollution.

[0003] Existing insecticides are only effective against adult tobacco beetles, and are not very effective against eggs or pupae. Furthermore, current insecticides are primarily used on outdoor crops, while tobacco beetles typically breed and lay eggs in tobacco production equipment and in areas that are difficult to clean, such as gaps in equipment, corners, or places where dust easily accumulates. This results in poor adhesion and an inability to achieve continuous and comprehensive pest control. On the other hand, tobacco dust and debris generated during production in the high-temperature and high-humidity environment of tobacco factories repeatedly adhere to equipment surfaces and walls, leading to mold growth. Therefore, there is an urgent need for more environmentally friendly, long-lasting, and comprehensive control technologies for tobacco beetles and mold growth during production. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of existing insecticides that cannot effectively inhibit the reproduction of tobacco beetle larvae or eggs, and that have poor adhesion on devices with smooth metal surfaces, thus failing to achieve continuous insecticidal and anti-mildew effects, thereby providing a long-lasting anti-mildew insecticide and its preparation method.

[0005] In a first aspect, the present invention provides a long-lasting antifungal and insecticidal agent, comprising, by weight, the following raw materials: 50-60 parts of latex paint emulsion, 5.5-15 parts of insecticidal microcapsule composition, 1-3 parts of antifungal agent, 0.002-0.5 parts of attractant, 1-3 parts of accelerator, 1-3 parts of coupling agent, 1-2 parts of wetting agent, 1-3 parts of thickener, 0.5-2 parts of defoamer, and 1-3 parts of filler;

[0006] The insecticidal microcapsule composition comprises, by weight, 1-6 parts of adult insecticidal microcapsules, 1-6 parts of larval insecticidal microcapsules and 1-6 parts of bacterial microcapsules.

[0007] In one optional embodiment, the adult insecticidal microcapsules are selected from at least one of tetrabromopyrethrin microcapsules, dinotefuran microcapsules, chlorpyrifos microcapsules, spinosad microcapsules, ethyl spinosad microcapsules, dextromethorphan microcapsules, cyfluthrin microcapsules, carbofuran microcapsules, methyl pyrimidinium microcapsules, and ethyl carbamate microcapsules.

[0008] In one optional embodiment, the larval insecticidal microcapsules are selected from at least one of S-tebufenozide microcapsules, flufenoxuron microcapsules, pyriproxyfen microcapsules, methoxyfenozide microcapsules, diflubenzuron microcapsules, furazolidone microcapsules, flufenoxuronamide microcapsules, azadirachtin microcapsules, spirotetramat microcapsules, and chlorantraniliprole microcapsules.

[0009] In one alternative embodiment, the bacterial microcapsules are selected from Bacillus thuringiensis microcapsules and / or Bacillus subtilis microcapsules.

[0010] The name of the microcapsule includes its active ingredient. For example, the active ingredient of tetrabromopermethrin microcapsules is tetrabromopermethrin, and so on.

[0011] In one optional embodiment, each microcapsule in the insecticidal microcapsule composition comprises, by weight, the following raw materials: 1-4 parts of each active ingredient, 1-4 parts of capsule wall material, 40-50 parts of organic solvent, 1-3 parts of emulsifier, and 30-40 parts of water.

[0012] In one alternative embodiment, the capsule wall material is selected from at least one of melamine, polyurethane, polyurea, and polylactic acid.

[0013] In one optional embodiment, the organic solvent is selected from at least one of propylene glycol monomethyl ether acetate, xylene, butyl acetate, and turpentine.

[0014] In one alternative embodiment, the emulsifier is selected from at least one of polyvinyl alcohol, hydroxyethyl cellulose, polysorbate, gum arabic, gelatin, Tween, and sodium dodecyl sulfonate.

[0015] In one optional embodiment, the latex paint emulsion is selected from at least one of polyvinyl acetate latex paint, ethylene propylene latex paint, pure acrylic latex paint, styrene-acrylic latex paint, and tertiary carbon paint.

[0016] In one optional embodiment, the antifungal agent is benzisothiazoline-3-one and / or negative ion powder; the negative ion powder has a dual function, which can prevent mold and also help inhibit insect eggs.

[0017] In one alternative embodiment, the attractant is selected from at least one of aqueous fluorescent powder, insect attractant liquid, and tobacco beetle sex pheromone.

[0018] In one alternative embodiment, the accelerator is selected from at least one of ethanol, acetic acid, and fluorozirconic acid.

[0019] In one alternative embodiment, the coupling agent is selected from at least one of vinylsilane, methacryloxysilane, aminosilane, and mercaptosilane.

[0020] In one alternative embodiment, the wetting agent is selected from 1211 wetting agent and / or X405 wetting agent.

[0021] In one alternative embodiment, the thickener is selected from RM-2020 and / or TT935.

[0022] In one alternative embodiment, the defoamer is selected from at least one of modified siloxanes, organosilicon defoamers, and mineral oil defoamers.

[0023] In one alternative embodiment, the filler is selected from at least one of diatomaceous earth, sepiolite, attapulgite, bentonite, and talc.

[0024] Secondly, the present invention provides a method for preparing the above-mentioned insecticide, comprising the following steps:

[0025] Step S11: Mix the latex paint emulsion, wetting agent, thickener, defoamer and water to obtain solution 1;

[0026] Step S12: Mix the insecticidal microcapsule composition, antifungal agent, attractant and water to obtain solution 2;

[0027] Step S13: Mix solution 1, solution 2, accelerator, coupling agent and filler to prepare a long-lasting antifungal and insecticidal agent.

[0028] In an alternative implementation, in step S11, the mixing method is ultrasound.

[0029] In one optional embodiment, the frequency of the ultrasound is 40-50 kHz, the temperature is 50-70 °C, and the duration is 10-30 min.

[0030] In one alternative implementation, the mixing method in step S12 is stirring.

[0031] In one optional embodiment, the stirring time is 20-40 minutes.

[0032] In an alternative implementation, in step S13, the mixing is performed by stirring and / or sonication.

[0033] In one optional embodiment, the stirring temperature is 50-70°C, the time is 1-3 hours, the ultrasonic frequency is 40-50 kHz, and the time is 4-6 hours.

[0034] In an alternative implementation, step S13 further includes adjusting the pH using a pH adjuster after mixing.

[0035] In one optional embodiment, the pH is 7-9, and the pH adjuster is selected from at least one of sodium ethoxide, sodium ethylene glycol, sodium diethylene glycol, triethanolamine, and diethanolamine.

[0036] In one optional embodiment, the preparation of each microcapsule in the insecticidal microcapsule composition includes the following steps:

[0037] Step S21: Mix the emulsifier and water to form an aqueous phase;

[0038] Step S22: Mix the active ingredient and capsule wall material with an organic solvent to form an oil phase;

[0039] Step S23: Mix the oil phase and the water phase, emulsify, and obtain microcapsules.

[0040] Thirdly, the present invention also provides a durable anti-mildew and insecticidal coating, wherein the coating is formed by applying the above-mentioned insecticide or the insecticide prepared by the above-mentioned preparation method onto the surface of a substrate.

[0041] The technical solution of this invention has the following advantages:

[0042] 1. The present invention provides a long-lasting antifungal and insecticidal agent, comprising, by weight, the following raw materials: 50-60 parts of latex paint emulsion, 5.5-15 parts of insecticidal microcapsule composition, 1-3 parts of antifungal agent, 0.002-0.5 parts of attractant, 1-3 parts of accelerator, 1-3 parts of coupling agent, 1-2 parts of wetting agent, 1-3 parts of thickener, 0.5-2 parts of defoamer, and 1-3 parts of filler; by weight, the insecticidal microcapsule composition comprises the following components: 1-6 parts of adult insecticidal microcapsules, 1-6 parts of larval insecticidal microcapsules, and 1-6 parts of bacterial microcapsules. On the one hand, this invention leverages the multiple advantages of using the three types of microcapsules in a specific ratio. First, the three insecticidal microcapsules can work synergistically to kill adult beetles, larvae, eggs, and pupae comprehensively, which helps reduce the tobacco beetle's resistance to insecticides in the later stages. Second, the release of active drugs through drug-loaded microcapsules can provide long-lasting insecticidal and insect-repellent effects on the insecticide contact surface. The microcapsules are sensitive to release in high temperature and high humidity environments, which is precisely where tobacco beetles tend to reproduce easily. In low temperature and dry environments, the insect population is significantly reduced. The release rate of the microcapsules is temperature-dependent; when the temperature is higher, the tobacco beetle activity is more frequent, resulting in a faster release rate, and vice versa. The high compatibility between the insect population and the release rate of the microcapsules enhances the insecticidal effect.

[0043] On the other hand, this invention utilizes latex paint emulsion, insecticidal microcapsule composition, antifungal agent, attractant, accelerator, coupling agent, wetting agent, thickener, defoamer, and filler in a specific ratio to form an insecticide. The latex paint emulsion, acting as a film-forming carrier, not only imparts excellent adhesion to the formulation, enabling it to firmly adhere to various substrates such as walls, wood, and fabrics to form a uniform protective film with good breathability, but also encapsulates the insecticidal microcapsules and antifungal agent, achieving slow release of active ingredients and extending the duration of effectiveness. The insecticidal microcapsule composition, through a slow-release mechanism via the capsule wall, precisely targets adult tobacco beetles, larvae, eggs, and pupae. The antifungal agent specifically inhibits the spores of molds such as Aspergillus, Penicillium, and Trichoderma. The germination and reproduction of insects are prevented from the source, blocking the odor, discoloration, and substrate decay caused by mold. Attractants actively attract tobacco beetles to the insecticide by mimicking the natural pheromones or food odors of pests, thus improving the efficiency of insecticidal and mold-preventing treatment. Accelerators and coupling agents can effectively improve the compatibility of insecticides with metal substrates, preventing peeling after long-term use. Wetting agents and defoamers work synergistically to ensure that the insecticide forms a smooth and even film during construction, without affecting the appearance and texture. Thickeners adjust the viscosity of the system, making it suitable for various construction methods such as brushing and spraying, balancing construction convenience and film uniformity. The addition of fillers with high specific surface area can form release channels after the insecticide film is formed, improving the film's breathability.

[0044] In summary, the long-lasting anti-mold and insecticide provided by this invention has significant anti-mold and insecticidal effects, effectively solving the problem of tobacco beetle breeding and mold contamination coexisting, extending the service life of the substrate, and providing a long-lasting, safe, and environmentally friendly anti-mold and insecticidal solution.

[0045] 2. This invention provides a method for preparing a long-lasting antifungal insecticide, comprising the following steps: S11: mixing latex paint emulsion, wetting agent, thickener, defoamer, and water to obtain solution 1; S12: mixing insecticidal microcapsule composition, antifungal agent, attractant, and water to obtain solution 2; S13: mixing solution 1, solution 2, accelerator, coupling agent, and filler to obtain the long-lasting antifungal insecticide. This preparation method is simple and easy to operate. The resulting insecticide has significant effects in inhibiting tobacco beetles and controlling mold, which is beneficial for industrial production and large-scale application.

[0046] 3. This invention provides a durable anti-mildew and insecticidal coating, which is formed by applying the above-mentioned insecticide or an insecticide prepared by the above-mentioned method to the surface of a substrate. This coating is colorless and odorless, and provides durable protection against insect eggs and mold on both direct contact surfaces with tobacco beetles and indirect contact surfaces within 30 mm of the direct contact surface, such as tobacco production equipment. It also avoids the quality risk of affecting the taste of cigarettes due to odor adsorption during the cigarette production process, complying with the management regulations of the tobacco processing industry. Furthermore, the addition of a coupling agent to the coating improves its adhesion to metal surfaces; in the cross-cut adhesion test, its adhesion is rated at level 0, ensuring that the coating adheres to smooth metal surfaces such as stainless steel for a long time without peeling off. This prevents the risk of foreign matter or impurities contaminating materials during the production process due to coating powdering or peeling, thus avoiding any impact on cigarette quality. Attached Figure Description

[0047] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0048] Figure 1 This is a diagram showing the insect-suppressing effect of Embodiment B1 of the present invention applied to tobacco factory equipment in Experimental Example 2;

[0049] Figure 2 This is a diagram showing the results of the bonding force test in Example B1 of the present invention in Experimental Example 3;

[0050] Figure 3 This is a graph showing the results of the anti-mildew durability test in Example B2 of the present invention in Experimental Example 4. Detailed Implementation

[0051] The following embodiments are provided to better understand the present invention and are not limited to the preferred embodiments described. They do not constitute a limitation on the content and scope of protection of the present invention. Any product that is the same as or similar to the present invention, derived by any person under the guidance of the present invention or by combining the features of the present invention with other prior art, falls within the protection scope of the present invention.

[0052] For experiments not specifically described in the examples, the procedures or conditions should be followed according to the conventional experimental procedures described in the literature in this field. Reagents or instruments whose manufacturers are not specified are all commercially available conventional reagent products.

[0053] Zero-VOC pure acrylic emulsion SF-01: purchased from Dow Chemical Company, model: RN-1000V, specification: 1000kg / IBC, solids content: 53.5%;

[0054] Water-based fluorescent powder: purchased from Guangdong Huanas Industrial Co., Ltd., model: UB801-1, specification: 10g;

[0055] Negative ion powder: Wuxi Jindeng Decoration Engineering Co., Ltd., Model: JD-01, Specification: 2000 mesh;

[0056] Juduole Insect Attractant Liquid: Purchased from Smett Belgium, Specification: 200ml / bottle;

[0057] Tobacco beetle sex pheromone: purchased from Beijing Greenbiyuan Technology Co., Ltd., model: CC-L-004, specification: 700mg / tube;

[0058] Wetting agent X405: Purchased from Wuxi Handerson Chemical Products Co., Ltd., model: 00405, specification: 500ml / bottle;

[0059] Thickener TT93: Purchased from Ruipin New Materials Co., Ltd., model: RP-316, specification: 500g;

[0060] Defoamer CF245: Purchased from Foshan Nanhai Datian Chemical Co., Ltd., model: AT-280, specification: 100g;

[0061] Methacryloxysilane KH-570: Purchased from Dongguan Kangjin New Material Technology Co., Ltd., Model: Coupling Agent KH-570, Specification: 500g;

[0062] Aminosilane KH-792: Purchased from Dongguan Kangjin New Material Technology Co., Ltd., model: KH-792, specification: 500g;

[0063] Diatomaceous earth: Purchased from Dongguan Senda Diatomaceous Earth Materials Co., Ltd., model: SD-310, specification: 1000g;

[0064] Bentonite: Purchased from Shandong Yousuo Chemical Technology Co., Ltd., model: I93102115; specification: 1000g;

[0065] Informational vegetarian attractant insect detection kit: purchased from Guangzhou Duoyuduo Biotechnology Co., Ltd., dimensions: 18.7*6*2cm;

[0066] Polyvinyl alcohol: Purchased from Langfang Feitai New Material Technology Co., Ltd., model: 2488, specification: 500g;

[0067] Polyurethane: Purchased from Sichuan Youborui New Materials Co., Ltd., model: UBR C5-30, specification: 20kg;

[0068] Polyurea: Purchased from Guangdong Huapo Technology Co., Ltd., model: hp-211, specification: 20kg;

[0069] Melamine ester: purchased from Guangzhou Shanghe New Material Technology Co., Ltd., model: CYMEL 303LF, specification: 25kg.

[0070] Example A1

[0071] This embodiment provides a method for preparing fipronil microcapsules, including the following steps:

[0072] (1) Mix 1 part by weight of polyvinyl alcohol and 1 part by weight of sodium dodecyl sulfonate with 30 parts by weight of water, heat to 78°C on a magnetic stirrer and stir for 55 minutes to completely dissolve them and form an aqueous phase.

[0073] (2) Mix 2 parts by weight of active ingredient (fipronil) and 2 parts by weight of capsule wall material (polyurethane) with 50 parts by weight of organic solvent (propylene glycol monomethyl ether acetate), stir with a glass rod and shake with a shaker for 2.5 hours to fully dissolve and form an oil phase;

[0074] (3) The oil phase was quickly poured into the aqueous phase and emulsified by high-speed shearing machine for 25 min. The emulsified solution was then vacuum dried at 60℃ for 10 h to obtain insecticidal microcapsule powder (fipronil microcapsules).

[0075] Examples A2-A14

[0076] Examples A2-A14 provide a method for preparing insecticidal microcapsules, which is basically the same as that of Example A1, except that one or more of the following are different: the type of active ingredient, the amount of active ingredient, the type of capsule wall material, the amount of capsule wall material, the type of organic solvent, the amount of organic solvent, and the amount of water. See Table 1 for details.

[0077] Table 1. Composition and dosage of microcapsules (parts by weight)

[0078]

[0079] Example B1

[0080] This embodiment provides a long-lasting antifungal and insecticidal agent, comprising the following raw materials in parts by weight:

[0081] 50 parts of latex paint emulsion (specifically: zero-VOC pure acrylic emulsion SF-01), 15 parts of insecticidal microcapsule composition (specifically: 3 parts of fipronil microcapsules prepared in Example A1, 3 parts of cypermethrin microcapsules prepared in Example A2, 3 parts of S-tebufenozide microcapsules prepared in Example A3, 3 parts of pyriproxyfen microcapsules prepared in Example A4, and 3 parts of Bacillus thuringiensis microcapsules prepared in Example A5), 2 parts of antifungal agent (specifically: 1 part of benzisothiazolin-3-one, 1 part of negative ion powder), 0.122 parts of attractant (specifically: 0.02 parts of water-based fluorescent powder, 0.1 parts of PUDO insect attractant liquid, 0.002 parts of tobacco beetle sex pheromone), 1.5 parts of wetting agent X405, 2 parts of thickener TT935, and defoamer CF245. 1 part of accelerator acetic acid, 1 part of coupling agent methacryloxysilane KH-570, 2 parts of filler diatomaceous earth, and 30 parts of water.

[0082] This embodiment provides a method for preparing a long-lasting antifungal and insecticidal agent, comprising the following steps:

[0083] (1) Mix the above-mentioned parts by weight of latex paint emulsion, wetting agent, thickener, defoamer with 15 parts by weight of water using ultrasonic mixing at a frequency of 45 kHz and a temperature of 60℃ for 20 min to obtain solution 1.

[0084] (2) Mix the insecticidal microcapsule composition, antifungal agent, attractant and 15 parts by weight of water for 30 min to obtain solution 2;

[0085] (3) Mix solution 1, solution 2, accelerator, coupling agent and filler at 60°C. After stirring for 2 hours, perform ultrasonic treatment at 45 kHz. After ultrasonic treatment for 5 hours, adjust the pH to 8 with sodium glycolate to obtain a long-lasting antifungal and insecticidal agent.

[0086] This embodiment provides a durable anti-mildew and insecticidal coating. The insecticide prepared above is uniformly coated on the surface of the equipment to be treated, and then left to dry to obtain the durable anti-mildew and insecticidal coating.

[0087] Example B2

[0088] This embodiment provides a long-lasting antifungal and insecticidal agent, comprising the following raw materials in parts by weight:

[0089] 50 parts of latex paint emulsion (specifically: zero-VOC pure acrylic emulsion SF-01), 6 parts of insecticidal microcapsule composition (specifically: 2 parts of ethyl spinosad microcapsules prepared in Example A6, 2 parts of dextromethorphan microcapsules prepared in Example A7, 1 part of fluazinam microcapsules prepared in Example A8, and 1 part of Bacillus subtilis microcapsules prepared in Example A9), 2 parts of antifungal agent (specifically: 1 part of benzisothiazoline-3-one and 1 part of negative ion powder), 0.5 parts of attractant (specifically: 0.2 parts of water-based fluorescent powder, 0.1 parts of Poldola brand insect attractant liquid, and 0.2 parts of tobacco beetle sex pheromone), 2 parts of wetting agent X405, 3 parts of thickener TT935, 2 parts of defoamer CF245, 3 parts of accelerator fluorozirconic acid, 3 parts of coupling agent aminosilane KH-792, 3 parts of filler bentonite, and 30 parts of water.

[0090] This embodiment provides a method for preparing a long-lasting antifungal and insecticidal agent, comprising the following steps:

[0091] (1) Mix the above-mentioned parts by weight of latex paint emulsion, wetting agent, thickener, defoamer with 15 parts by weight of water using ultrasonic mixing at a frequency of 40 kHz and a temperature of 70 °C for 30 min to obtain solution 1.

[0092] (2) Mix the insecticidal microcapsule composition, antifungal agent, attractant and 15 parts by weight of water for 20 min to obtain solution 2;

[0093] (3) Mix solution 1, solution 2, accelerator, coupling agent and filler at 50°C for 3 hours and then sonicate at 40 kHz for 6 hours. Adjust the pH to 7 with sodium glycolate to obtain a long-lasting antifungal and insecticidal agent.

[0094] This embodiment provides a durable anti-mildew and insecticidal coating. The insecticide prepared above is uniformly coated on the surface of the equipment to be treated, and then left to dry to obtain the durable anti-mildew and insecticidal coating.

[0095] Example B3

[0096] This embodiment provides a long-lasting antifungal and insecticidal agent, comprising the following raw materials in parts by weight:

[0097] 50 parts of latex paint emulsion (specifically: zero-VOC pure acrylic emulsion SF-01), 7 parts of insecticidal microcapsule composition (specifically: 2 parts of spirotetramat microcapsules prepared in Example A10, 1 part of cyfluthrin microcapsules prepared in Example A11, 1 part of carbofuran microcapsules prepared in Example A12, 1 part of furazolidone microcapsules prepared in Example A13, 1 part of flupyradifurone microcapsules prepared in Example A14, and 1 part of Bacillus thuringiensis microcapsules prepared in Example A5), 2 parts of antifungal agent (specifically: 1 part of benzisothiazoline-3-one, 1 part of negative ion powder), 0.3 parts of attractant (specifically: 0.1 parts of water-based fluorescent powder, 0.1 parts of POLD insect attractant liquid, 0.1 parts of tobacco beetle sex pheromone), 1 part of wetting agent X405, 1 part of thickener TT935, and 1 part of defoamer CF245. 0.5 parts, 2 parts accelerator acetic acid, 1 part coupling agent methacryloxysilane KH-570, 1 part filler diatomaceous earth, and 30 parts water.

[0098] This embodiment provides a method for preparing a long-lasting antifungal and insecticidal agent, comprising the following steps:

[0099] (1) Mix the above-mentioned parts by weight of latex paint emulsion, wetting agent, thickener, defoamer with 15 parts by weight of water using ultrasonic mixing at a frequency of 50 kHz and a temperature of 50 °C for 10 min to obtain solution 1.

[0100] (2) Mix the insecticidal microcapsule composition, antifungal agent, attractant and 15 parts by weight of water for 40 min to obtain solution 2;

[0101] (3) Mix solution 1, solution 2, accelerator, coupling agent and filler at 70°C. After stirring for 1 hour, perform ultrasonic treatment at 50 kHz. After ultrasonic treatment for 4 hours, adjust the pH to 9 with sodium glycolate to obtain a long-lasting antifungal and insecticidal agent.

[0102] This embodiment provides a durable anti-mildew and insecticidal coating. The insecticide prepared above is uniformly coated on the surface of the equipment to be treated, and then left to dry to obtain the durable anti-mildew and insecticidal coating.

[0103] Comparative Example 1

[0104] This comparative example provides a long-lasting antifungal insecticide, its preparation method, and a long-lasting antifungal insecticide coating, which is basically the same as Example B1, except that the insecticidal microcapsule composition is replaced with the following parts by weight of insecticide technical composition: 2 parts of fipronil, 1 part of chlorpyrifos, 1 part of S-tebufenozide, 1 part of pyriproxyfen, and 4 parts of Bacillus thuringiensis.

[0105] Comparative Example 2

[0106] This comparative example provides a long-lasting antifungal and insecticidal agent, its preparation method, and a long-lasting antifungal and insecticidal coating, which are basically the same as Example B1, except that the Bacillus thuringiensis microcapsules in the insecticidal microcapsule composition are omitted, and the amount of the insecticidal microcapsule composition is adjusted to 12 parts.

[0107] Comparative Example 3

[0108] This comparative example provides a long-lasting antifungal and insecticidal agent, its preparation method, and a long-lasting antifungal and insecticidal coating, which is basically the same as Example B1, except that S-tebufenozide microcapsules and pyriproxyfen microcapsules in the insecticidal microcapsule composition are omitted, and the amount of the insecticidal microcapsule composition is adjusted to 9 parts.

[0109] Comparative Example 4

[0110] This comparative example provides a long-lasting antifungal and insecticidal agent, its preparation method, and a long-lasting antifungal and insecticidal coating, which is basically the same as Example B1, except that S-tebufenozide microcapsules, pyriproxyfen microcapsules, and Bacillus thuringiensis microcapsules in the insecticidal microcapsule composition are omitted, and the amount of the insecticidal microcapsule composition is adjusted to 6 parts.

[0111] Comparative Example 5

[0112] This comparative example provides a long-lasting antifungal and insecticidal agent, its preparation method, and a long-lasting antifungal and insecticidal coating, which is basically the same as Example B1, except that the fipronil microcapsules, chlorpyrifos microcapsules, and Bacillus thuringiensis microcapsules in the insecticidal microcapsule composition are omitted, and the amount of the insecticidal microcapsule composition is adjusted to 6 parts.

[0113] Comparative Example 6

[0114] This comparative example provides a long-lasting antifungal and insecticidal agent, its preparation method, and a long-lasting antifungal and insecticidal coating, which is basically the same as Example B1, except that the fipronil microcapsules, chlorpyrifos microcapsules, S-tebufenozide microcapsules, and pyriproxyfen microcapsules in the insecticidal microcapsule composition are omitted, and the amount of the insecticidal microcapsule composition is adjusted to 3 parts.

[0115] Experimental Example 1

[0116] Insect-inhibiting effect test: Ten open rectangular boxes, 80×60×40cm in size, were made of wood. 0.8kg of the durable antifungal and insecticidal agents obtained in Examples B1-B3 and Comparative Examples 1-6 were evenly applied to the inner surface of each box using a brushing method and dried at 60℃ for 4 hours to form a coating. The control group was not coated. Each box was placed in an environment with a temperature of 30℃ and an air humidity of 50%. Ten tobacco leaves, each 10cm long, were placed in each box. After introducing 60 adult tobacco beetles, the top was covered with a breathable membrane. The remaining number of tobacco beetles was recorded on days 1, 3, 7, 14, 20, and 30 after the start of the experiment.

[0117] Table 2 Results of insect-inhibiting effect test

[0118]

[0119] As can be seen from Table 2, the number of tobacco beetles in the blank group continued to increase, showing a clear reproductive trend. However, the insecticides prepared in the examples and comparative examples showed significant differences in their insecticidal effects. Comparing Examples B1-B5 with Comparative Examples 1-6, it can be found that the long-lasting antifungal insecticide prepared in Examples B1-B5 showed a significant inhibitory effect on tobacco beetles. All tobacco beetles died from day 1 to day 14, and there was no recurrence on day 30. This indicates that the long-lasting antifungal insecticide provided by the present invention has a continuous release and long-lasting insecticidal ability. The insecticidal effect of Comparative Examples 1-6 was not as good as that of Examples B1-B5, and the insecticidal effect was unstable, and even showed obvious rebound.

[0120] Experiment Example 2

[0121] The insecticide provided in Example B1 was uniformly coated onto the lifting feeder of the tobacco factory, with a coating amount of 0.05 g / cm². 2 Another identical feeder was selected without pesticide coating as a control. Seven days after coating, an insecticide-based pest detection kit was used to test the insect population. If... Figure 1 As shown, the results indicate that compared to equipment without pesticide coating, the number of tobacco beetles on equipment coated with the pesticide of this invention was significantly reduced. Furthermore, it was observed that dead adult beetles frequently appeared on the direct contact surface of the pesticide and on indirect contact surfaces within 30 mm of the direct contact surface. The development of tobacco beetle larvae was completely inhibited. When tobacco beetle eggs were laid on the treated area, their development was inhibited by the pesticide, resulting in several 3-4 mm long, white, hair-like secretions on the pesticide contact surface. In areas of the tobacco factory where non-tobacco beetle infestations were severe, testing with a pheromone attractant detection kit showed no infestation for 60 days after treatment.

[0122] Experimental Example 3

[0123] The binding strength test was conducted using the insecticide provided in Example B1: The test was performed according to GB / T9286—2021 standard and commissioned to Shanghai Microspection Testing Technology Group Co., Ltd. The specific procedures are as follows:

[0124] 1) Cross-cut test: Make 6 parallel cuts in the coating formed by the insecticide spray, and make another 6 parallel cuts perpendicular to the first cut, with a cut spacing of 2mm.

[0125] 2) Test conditions: The test was conducted at a temperature of (23±2)℃ and a relative humidity of (50±5)%.

[0126] 3) Conditioning of the test plate: Before the test, the test plate should be conditioned for at least 16 hours under the conditions of temperature (23±2)℃ and relative humidity (50±5)%.

[0127] 4) Evaluation criteria for bonding strength: as shown in Table 3.

[0128] Table 3 Grading Standards for Test Bond Strength

[0129]

[0130] 5) Results of bonding strength test:

[0131] like Figure 2 As shown, the coating formed by the anti-mildew and insecticide provided by the present invention has an adhesion grade of less than or equal to 0, which meets the optimal adhesion grade of the national standard. It can be applied on-site with different substrates to avoid the insecticide coating from falling off.

[0132] Experiment Example 4

[0133] The anti-mold durability test was conducted using the insecticide provided in Example B2: The test was performed according to GB / T 1741-2020 standard, commissioned to the Guangdong Provincial Center for Microbiology Analysis and Testing. The test strains listed in Table 3 of the standard were used, and the procedure was carried out according to section "7 Test Procedure" in the standard. Mold spores were inoculated using the hanging method, and then cultured for 28 days. The growth of mold on the sample surface was observed. The sample was graded based on the degree of mold growth.

[0134] The rating criteria are as follows:

[0135] Grade 0 - Not growing, meaning no growth is observed under a microscope (50x magnification);

[0136] Grade 1 - Mold growth coverage area is less than 10% (trace growth);

[0137] Level 2 - Mold growth coverage area is less than 30%, but not less than 10% (small amount of growth);

[0138] Level 3 - Mold growth coverage area is less than 60%, but not less than 30% (moderate growth);

[0139] Level 4 - Mold growth covers more than 60% to completely (severe growth).

[0140] Experimental results:

[0141] like Figure 3As shown, the substrate before the test was only the anti-mold insecticide provided by this invention without inoculation with mold spore liquid, and the substrate after the test was inoculated with mold spore liquid and cultured for 28 days. The rating was 1, indicating that the insecticide provided by this invention only causes trace growth of mold under conditions such as high humidity and warmth, which are conducive to the growth of mold, and the long-term performance will not be reduced due to the influence of mold.

[0142] Experimental Example 5

[0143] The pesticide provided in Example B3 was used for hazardous substance testing: The testing was conducted according to GB 18582-2020 standard, commissioned to China Inspection Group Southern Testing Co., Ltd. The tested items included: volatile organic compound (VOC) content, formaldehyde content, benzene series compounds (benzene, toluene, xylene (including ethylbenzene)) content, total lead (Pb) content, soluble heavy metal content (cadmium, chromium, mercury), and alkylphenol polyoxyethylene ether (APEO) (octylphenol polyoxyethylene ether (OPE)). n EO) + Nonylphenol polyoxyethylene ether (NP) n EO content.

[0144] The test results are as follows:

[0145] Table 4 Hazardous Substance Detection Results

[0146]

[0147] As shown in Table 4, the content of harmful substances in the insecticide provided by this invention meets the requirements of national standards, is environmentally friendly and safe, and meets the safety and hygiene requirements for pest control in the tobacco industry.

[0148] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A long-lasting antimold insecticide, characterized in that, By weight, it includes the following ingredients: 50-60 parts latex paint emulsion, 5.5-15 parts insecticidal microcapsule composition, 1-3 parts mildew inhibitor, 0.002-0.5 parts attractant, 1-3 parts accelerator, 1-3 parts coupling agent, 1-2 parts wetting agent, 1-3 parts thickener, 0.5-2 parts defoamer, and 1-3 parts filler; The insecticidal microcapsule composition, by weight, comprises the following components: 1-6 parts of adult insecticidal microcapsules, 1-6 parts of larval insecticidal microcapsules, and 1-6 parts of bacterial microcapsules; the adult insecticidal microcapsules are selected from at least one of fipronil microcapsules, chlorfenapyr microcapsules, spinosad microcapsules, dextromethorphan microcapsules, cyfluthrin microcapsules, and carbofuran microcapsules; the larval insecticidal microcapsules are selected from at least one of S-tebufenozide microcapsules, flufenoxuron microcapsules, pyriproxyfen microcapsules, furazolidone microcapsules, flupyradifurone microcapsules, and spirotetramat microcapsules; the bacterial microcapsules are selected from Bacillus thuringiensis microcapsules and / or Bacillus subtilis microcapsules. Each microcapsule in the insecticidal microcapsule composition comprises, by weight, the following raw materials: 1-4 parts of each active ingredient, 1-4 parts of capsule wall material, 40-50 parts of organic solvent, 1-3 parts of emulsifier, and 30-40 parts of water; the capsule wall material is selected from at least one of melamine, polyurethane, polyurea, and polylactic acid; the organic solvent used in the adult insecticidal microcapsules and larval insecticidal microcapsules is at least one of propylene glycol monomethyl ether acetate, xylene, butyl acetate, and turpentine, and the organic solvent used in the bacterial microcapsules is turpentine; the emulsifier is selected from at least one of polyvinyl alcohol, hydroxyethyl cellulose, polysorbate, gum arabic, gelatin, Tween, and sodium dodecyl sulfate.

2. The insecticide of claim 1, wherein, The latex paint emulsion is selected from at least one of polyvinyl acetate latex paint, ethylene propylene latex paint, pure acrylic latex paint, styrene-acrylic latex paint, and tert-carbon paint; And / or, the antifungal agent is benzisothiazolin-3-one and / or negative ion powder; And / or, the attractant is selected from at least one of aqueous fluorescent powder, insect attractant liquid, and tobacco beetle sex pheromone.

3. The insecticide of claim 1, wherein, The accelerator is selected from at least one of ethanol, acetic acid, and fluorozirconic acid; And / or, the coupling agent is selected from at least one of vinylsilane, methacryloxysilane, aminosilane, and mercaptosilane; And / or, the wetting agent is selected from 1211 wetting agent and / or X405 wetting agent; And / or, the thickener is selected from RM-2020 and / or TT935; And / or, the defoamer is selected from at least one of modified siloxanes, organosilicon defoamers, and mineral oil defoamers; And / or, the filler is selected from at least one of diatomaceous earth, sepiolite, attapulgite, bentonite, and talc.

4. Process for the preparation of the insecticide according to any one of claims 1 to 3, characterized in that, Includes the following steps: Step S11: Mix the latex paint emulsion, wetting agent, thickener, defoamer and water to obtain solution 1; Step S12: Mix the insecticidal microcapsule composition, antifungal agent, attractant and water to obtain solution 2; Step S13: Mix solution 1, solution 2, accelerator, coupling agent and filler to prepare insecticide.

5. The method of claim 4, wherein the insecticide is prepared by the steps of: In step S11, the mixing method is ultrasound.

6. The method of claim 5, wherein the insecticide is prepared by the steps of: The ultrasound frequency is 40-50kHz, the temperature is 50-70℃, and the duration is 10-30min.

7. The method of claim 4, wherein the insecticide is prepared by the steps of: In step S12, the mixing method is stirring.

8. The method for preparing the insecticide according to claim 7, characterized in that, The stirring time is 20-40 minutes.

9. The method for preparing the insecticide according to claim 4, characterized in that, In step S13, the mixing method is stirring and / or ultrasonication; And / or, in step S13, the mixing process further includes adjusting the pH using a pH adjuster.

10. The method for preparing the insecticide according to claim 9, characterized in that, The stirring temperature is 50-70℃, and the stirring time is 1-3 hours; And / or, the frequency of the ultrasound is 40-50 kHz, and the duration is 4-6 h; And / or, the pH is 7-9; And / or, the pH adjuster is selected from at least one of sodium ethoxide, sodium ethylene glycol, sodium diethylene glycol, triethanolamine, and diethanolamine.

11. The method for preparing the insecticide according to claim 4, characterized in that, The preparation of each microcapsule in the insecticidal microcapsule composition includes the following steps: Step S21: Mix the emulsifier and water to form an aqueous phase; Step S22: Mix the active ingredient and capsule wall material with an organic solvent to form an oil phase; Step S23: Mix the oil phase and the water phase, emulsify, and obtain microcapsules.

12. A durable anti-mildew and insecticidal coating, characterized in that, The coating is formed by applying the insecticide according to any one of claims 1-3 or the insecticide prepared by the preparation method according to any one of claims 4-11 onto the surface of the substrate.

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