Environment-friendly insect sticking glue as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of green prevention and control of plant protection, and particularly relates to an environment-friendly insect sticker and a preparation method and application thereof.The method comprises the steps that a tackifier is heated and melted, a nonionic surfactant is added and stirred to form a uniform oil phase, part of the hot water phase is slowly added into the oil phase, and W / O type pre-emulsion is obtained; preparing a water-based emulsion of the tackifier by adopting a reversed-phase emulsification method; after cooling, adding nano silicon dioxide, an antioxidant, an ultraviolet light absorber, a plasticizer and an insect attractant, shearing at a high speed, then adding water-based film-forming latex, and uniformly stirring to obtain the environment-friendly insect sticking glue. The stable aqueous emulsion is prepared from the tackifier, and the natural tackifier, the thickening agent and the bio-based anionic emulsifier are adopted, so that the emulsion has good biocompatibility and good degradability, and white pollution is avoided; and low-viscosity sizing is realized by adjusting a latex-water ratio system, the sizing difficulty is reduced, high-viscosity curing can be realized after moisture volatilization, and a very good insect sticking effect is achieved.

Description

Technical Field

[0001] The present invention relates to the field of green prevention and control of plant protection, and specifically to an environmentally friendly insecticide glue and a preparation method and application thereof. Background Art

[0002] my country has been a major agricultural country since ancient times. Currently, common agricultural pest control methods include chemical, physical, and biological control. Chemical control is quick to produce results, but it pollutes the environment and is detrimental to sustainable development. Physical control has been around for a long time and is relatively easy to master, but its effectiveness is incomplete and slow. Biological control is less polluting and effectively protects natural enemies, providing sustained control. However, its insecticidal effect is slow, and its use under high insect populations cannot quickly reduce them. Sticky insect boards are a simple, effective, low-cost, and green pest control method widely used in agricultural production.

[0003] Sticky insect boards require the use of sticky insect glue. Traditional sticky insect glue often uses chemical synthetic materials (such as polybutene and rosin resin) as the adhesive matrix. Some formulations contain benzene solvents or pyrethroid additives, which can easily cause soil and air pollution with long-term use. For example, some sticky insect glues release volatile organic compounds (VOCs) when exposed to high temperatures or ultraviolet light, posing a potential threat to the ecological environment and human health, and contradicting the development concept of green agriculture.

[0004] The existing insect glue construction relies on manual application or mechanical roller coating. Due to the high viscosity of the colloid (such as 2000-3000cps), some insect glues need to be used with solvents such as ethanol and acetone, which further increases the complexity of the operation and the environmental burden.

[0005] 109169579A uses gasoline as an organic solvent. High solvent levels can cause widespread VOC pollution, while low solvent levels can lead to excessively high viscosity, resulting in uneven application and low efficiency. Furthermore, insect glues like CN 106359337A, which use water-based acrylic or styrene acrylic latex as a binder, tend to sag at high temperatures and harden at low temperatures, making them difficult to extend. This leads to poor aging resistance, which compromises their effectiveness.

[0006] With the advancement of green agricultural pest control policies, the market urgently needs an insecticide-resistant adhesive technology that is environmentally friendly, easy to apply, and highly targeted. Furthermore, the development of long-lasting pheromone-releasing composite colloids can significantly improve the precision of pest control.

[0007] In response to the above technical problems, the current insect glue technology in the field of plant protection urgently needs an environmentally friendly and green insect glue. Summary of the Invention

[0008] To address the above technical issues, the present invention provides an environmentally friendly insect glue, its preparation method, and its application. This overcomes the drawbacks and shortcomings of existing insect glue, such as its environmental issues and difficulty in application and use. By applying the insect glue of the present invention to insect sticky boards, the difficulty of use is effectively reduced, and the biodegradability and environmental safety of the glue are improved.

[0009] In order to achieve the above object, the technical solution of the present invention is achieved as follows:

[0010] A method for preparing environmentally friendly insect glue comprises the following steps:

[0011] (1) The thickener is heated and melted, and a nonionic surfactant with an HLB value of 3-5 is added and stirred to form a uniform oil phase. Deionized water is heated and a thickener is added to dissolve to obtain a uniform aqueous phase. A portion of the aqueous phase is slowly added to the oil phase with an oil-water ratio of 1.5-2.5:1, and high-speed shearing is performed to form a W / O (water-in-oil) type pre-emulsion. The thickener is a natural thickener, which is biodegradable and has the effect of increasing the leveling of the sticky glue emulsion and can prevent the sticky glue from drying and cracking after drying.

[0012] Slowly adding the remaining aqueous phase to the pre-emulsion of step (1), and adding a surfactant to adjust the HLB value to 12-16 to form an oil-in-water emulsion; performing high-speed shearing and high-pressure homogenization, and adding alkali to adjust the pH to obtain an aqueous emulsion of a thickener; after high-speed shearing and high-pressure homogenization, the emulsion droplets are smaller, more evenly distributed, and have good stability;

[0013] (2) Step (2) The aqueous emulsion is cooled, nano-silica, an antioxidant, an ultraviolet absorber, a plasticizer and an insect attractant are added, and high-speed shearing is performed. Then, the aqueous film-forming latex is added and stirred evenly to obtain the environmentally friendly insect glue.

[0014] Furthermore, in step (1), the tackifier is rosin glycerol ester, natural rosin, disproportionated rosin, or terpene resin; the nonionic surfactant is Span-60 and / or Span-80; the thickener is xanthan gum, guar gum, or locust bean gum; the amount of the nonionic surfactant is 1-2 wt% of the tackifier; and the mass ratio of the thickener to deionized water is 0.1:3-10. All thickeners are bio-based, have good biodegradability, and do not cause environmental pollution.

[0015] Furthermore, the temperature of heating and melting in step (1) is 100-130°C; the conditions for high-speed shearing are: shearing speed of 2000-4000 rpm, time of 10-20 min; and the temperature of heating deionized water is 70-80°C.

[0016] Furthermore, the surfactant in step (2) is one or more of C8-C10 alkyl glycoside, AEO-7, AEO-9, Tween-80, sodium fatty acid methyl ester sulfonate and sodium dodecyl sulfate, and the amount of the surfactant is 2-3wt% of the thickener; the pH after adjustment is 8-9; the amount of sodium dodecyl sulfate is ≤0.5wt% of the thickener, APG, MES, and AEO series are all bio-based or degradable surfactants, which meet the requirements of green agriculture and are more environmentally friendly than traditional petroleum-based surfactants (such as OP-10); APG and AEO-9 have a certain odor diffusion effect and can assist in attracting pests (such as aphids and whiteflies); although sodium dodecyl sulfate (SDS) is derived from petrochemicals, it is easily biodegradable and has a low cost; the surfactant used in the present invention can significantly improve wettability, sizing processability, and environmental adaptability, while taking into account environmental protection.

[0017] Furthermore, in step (2), the oil-water ratio is 1:5-8, the high-speed shearing condition is 5000-7000 rpm, and the shearing time is 15-20 minutes; the high-pressure homogenization condition is 20-40 MPa, and the cycle is repeated 2-3 times; in step (3), the temperature is lowered to 40-60°C; the high-speed shearing condition is 2000-4000 rpm, and the shearing time is 10-20 minutes; and the mass ratios of the tackifier, nano-silica, antioxidant, ultraviolet absorber, plasticizer, aqueous film-forming latex, and insect attractant are 6-15:1-5:0.2-0.5:0.2-0.4:2-4:25-35:0.05-0.15. Nano-silica can increase the stability of the emulsion and prevent the insect glue from hanging.

[0018] Furthermore, in step (3), the particle size of the nano-silica is 20-30 nm; the ultraviolet absorber is nano-titanium dioxide or nano-zinc oxide; the antioxidant includes any one or more of antioxidant 1135 and antioxidant 1520; the plasticizer is dioctyl phthalate, tributyl citrate or acetyl tributyl citrate; and the aqueous film-forming latex is one or more of methyl methacrylate latex, isooctyl acrylate latex, n-butyl acrylate latex, glycidyl methacrylate latex, ethylene glycol dimethacrylate latex and hydroxyethyl methacrylate latex.

[0019] Furthermore, the solid content of the aqueous film-forming latex in step (3) is 50-60wt%, the pH is 7.5-8.5, and the viscosity is 3200-3800cps; the insect attractant is one or more of cotton bollworm attractant, peach borer attractant, striped stem borer attractant, fruit fly attractant, tobacco beetle attractant, tobacco powder borer attractant, pear borer attractant and pine sawyer attractant.

[0020] Furthermore, in the step (3), an organosilicon defoamer is added, and the mass ratio of the organosilicon defoamer to the aqueous film-forming latex is 0.1-0.3:25; or the insect attractant is a microencapsulated insect attractant; and the coverage rate of the microencapsulated insect attractant is 90-95 wt%.

[0021] Furthermore, any environmentally friendly insect glue prepared by the above method.

[0022] Furthermore, the environmentally friendly insect sticky glue is used in insect sticky boards.

[0023] The microcapsule technology for encapsulating insect attractants can be implemented by referring to the methods of the prior art, such as CN111109255A.

[0024] The main target pests corresponding to the insect attractants are shown in Table 1.

[0025] Table 1:

[0026]

[0027] Beneficial effects of the present invention:

[0028] 1. The present invention provides a preparation process for environmentally friendly insect glue, optimizes the preparation process, and prepares a stable oil-in-water emulsion by using a phase inversion emulsification method to obtain a tackifier, thereby avoiding the use of organic solvents and improving the environmental friendliness of the water-based insect glue. In addition, the formula of the present invention uses natural tackifiers and their derivatives, thickeners, and bio-based anionic emulsifiers, which have good biocompatibility and good degradability, and avoid white pollution.

[0029] 2. The present invention achieves low-viscosity sizing by adjusting the latex-water ratio system, reducing the difficulty of sizing, making it convenient for farmers to use, and making the gluing labor-saving, convenient and fast; after the water evaporates, it can be solidified with high viscosity, and has a good insect-repelling effect.

[0030] 3. The addition of nano-silicon dioxide in the present invention can improve the stability of the aqueous emulsion, and can also improve the thixotropy of the sticky glue in synergy with the thickener to prevent sagging; the antioxidant and ultraviolet absorber delay the aging of the colloid and increase the service life of the sticky glue.

[0031] 4. The present invention adopts microcapsule technology to encapsulate the insect attractant, thereby extending the effective period of release of the insect attractant and further improving the insect sticking effect. DETAILED DESCRIPTION

[0032] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The insect attractants in the following examples and comparative examples are one or more of the ones listed in Table 1; they can be added according to actual needs.

[0034] Example 1

[0035] This embodiment provides a method for preparing environmentally friendly insect glue, and the preparation steps are as follows:

[0036] (1) 8 g of natural rosin was heated to 130° C. to melt (higher than the melting point of natural rosin) and 0.12 g (1.5 wt% of natural rosin) of Span-80 (HLB value of 4.3) was added and stirred to form a uniform oil phase. 45 g of deionized water was heated to 70° C. and 0.45 g of thickener xanthan gum was added and stirred to dissolve to obtain a uniform aqueous phase. A portion of the aqueous phase was slowly added to the oil phase at an oil-water ratio of 1.5:1. High shear was applied at a shear rate of 3000 rpm for a shear time of 20 min to form a W / O type pre-emulsion.

[0037] (2) Slowly adding the remaining aqueous phase to the pre-emulsion of step (1), at which time the oil-water ratio is 1:5.6, and adding 0.136g Tween-80 (1.7wt%) and 0.64g SDS (0.8wt%) surfactants, the HLB value of the total surfactant is 16, the shear rate is 5000rpm, and the shear time is 20min; the high-pressure homogenization condition is 20MPa, and the cycle is repeated 3 times; adding alkali to adjust the pH to 8 to obtain an aqueous emulsion of the thickener;

[0038] (3) Cooling to 50° C., adding nano-silica, antioxidant 1135, ultraviolet absorber nano-titanium dioxide, plasticizer dioctyl phthalate and insect attractant to step (2), high-speed shearing, shearing speed of 3000 rpm, shearing time of 15 min; then adding aqueous film-forming latex, wherein the mass ratio of nano-silica, antioxidant, ultraviolet absorber, plasticizer, aqueous film-forming latex and insect attractant to tackifier is 3:0.5:0.3:4:25:0.2:8, aqueous film-forming latex is a mixture of butyl methacrylate latex and glycidyl methacrylate latex in a mass ratio of 1:1, the solid content of the aqueous film-forming latex is 60wt%, the viscosity is 3800cps, stirring evenly, and then obtaining environmentally friendly sticky insect glue, the obtained environmentally friendly sticky insect glue particle size distribution: D90≤2μm, centrifugation (3000rpm, 30 minutes) without stratification, good stability; storing at room temperature

[0039] ≥6 months, solid content is 36.6wt%.

[0040] Example 2

[0041] This embodiment provides a method for preparing environmentally friendly insect glue, and the preparation steps are as follows:

[0042] (1) 6 g of rosin glycerol ester was heated to 110° C. to melt and 0.06 g (1.0 wt% rosin glycerol ester) of Span-80 (HLB 4.3) was added and stirred to form a uniform oil phase. 42 g of deionized water was heated to 80° C. and 1.26 g of guar gum (a thickener) was added and stirred to dissolve to obtain a uniform aqueous phase. A portion of the aqueous phase was slowly added to the oil phase at an oil-water ratio of 2:1. High shear was applied at a shear rate of 2000 rpm for 20 min to form a W / O pre-emulsion.

[0043] (2) slowly adding the remaining aqueous phase to the pre-emulsion of step (1), at which time the oil-water ratio is 1:7, and adding 0.156 g of a surfactant, C9 alkyl glycoside (2.6 wt%), with a total surfactant HLB value of 12.55, a shear rate of 5000 rpm, and a shear time of 20 min; the high-pressure homogenization condition is 40 MPa, and the cycle is repeated twice; adding alkali to adjust the pH to 9, and obtaining an aqueous emulsion of a tackifier;

[0044] (3) Cooling to 45°C, adding nano-silica, antioxidant 1520, ultraviolet absorber nano-titanium dioxide, plasticizer dioctyl phthalate and insect attractant to step (2), high-speed shearing, shearing speed of 4000 rpm, shearing time of 10 min; then adding water-based film-forming latex, wherein the mass ratio of nano-silica, antioxidant, ultraviolet absorber, plasticizer, water-based film-forming latex and insect attractant to tackifier is 2:0.3:0.3:3 : 25:0.15:6, the aqueous film-forming latex is a mixture of methyl methacrylate latex and butyl methacrylate latex in a mass ratio of 0.5:2, the solid content of the aqueous film-forming latex is 60wt%, the viscosity is 3200cps, and it is stirred evenly, and then the environmentally friendly sticky glue is obtained. The obtained environmentally friendly sticky glue has a particle size distribution: D90≤1μm, no stratification after centrifugation (3000rpm, 30 minutes), and good stability; it can be stored at room temperature for ≥6 months, and the solid content is 35.4wt%.

[0045] Example 3

[0046] This embodiment provides a method for preparing environmentally friendly insect glue, and the preparation steps are as follows:

[0047] (1) 10 g of terpene resin was heated to 120° C. to melt and 0.2 g of Span-60 (2 wt% natural rosin) was added, with an HLB value of 4.7; the mixture was stirred to form a uniform oil phase; 42 g of deionized water was heated to 70° C. and 0.84 g of xanthan gum was added and stirred to dissolve to obtain a uniform aqueous phase; a portion of the aqueous phase was slowly added to the oil phase, at which point the oil-water ratio was 2.5:1, and high shearing was performed at a shear rate of 2000 rpm for a shear time of 20 min to form a W / O type pre-emulsion;

[0048] (2) slowly adding the remaining aqueous phase to the pre-emulsion of step (1), at which time the oil-water ratio is 1:4.2, and adding 0.3 g of sodium fatty acid methyl ester sulfonate (3 wt %) as a surfactant, with an HLB value of 17 and a comprehensive HLB value of 12.08 for the surfactant; the shear rate is 5000 rpm, the shear time is 15 min; the high-pressure homogenization condition is 30 MPa, and the cycle is repeated twice; alkali is added to adjust the pH to 8.5 to obtain an aqueous emulsion of a thickener;

[0049] (3) cooling to 50° C. and adding nano-silica, antioxidant 1135, ultraviolet absorber nano-titanium dioxide, plasticizer acetyl tributyl citrate and insect attractant microcapsules to step (2), wherein the coverage rate of the insect attractant microcapsules is 90wt%, high-speed shearing, the shearing speed is 2000rpm, and the shearing time is 18min; then adding aqueous film-forming latex, wherein nano-silica, antioxidant, ultraviolet absorber, plasticizer, aqueous film-forming latex and insect attractant are added; The mass ratio of the agent microcapsules to the thickener is 2:0.3:0.3:3:25:1:10, the aqueous film-forming latex is glycidyl methacrylate latex, the solid content of the aqueous film-forming latex is 50wt%, and the viscosity is 3200cps. After stirring evenly, the environmentally friendly sticky insect glue is obtained, and the particle size distribution of the obtained environmentally friendly sticky insect glue is: D90≤2μm, there is no stratification after centrifugation (3000rpm, 30 minutes), and the stability is good; it can be stored at room temperature for ≥6 months, and the solid content is 35.9wt%.

[0050] Example 4

[0051] This embodiment provides a method for preparing environmentally friendly insect glue, and the preparation steps are as follows:

[0052] (1) 15 g of disproportionated rosin was heated to 100 ° C and melted, and 0.225 g of Span-80 (1.5 wt% disproportionated rosin) was added, and the HLB value of Span-80 was 4.3. The mixture was stirred to form a uniform oil phase. 45 g of deionized water was heated to 70 ° C, and 1.35 g of a mixture of locust bean gum and xanthan gum (mass ratio of 1:1) was added and stirred to dissolve to obtain a uniform aqueous phase. Part of the aqueous phase was slowly added to the oil phase. At this time, the oil-water ratio was 2.5:1. High-speed shearing was performed at a shear speed of 3000 rpm and a shear time of 15 min to form a W / O type pre-emulsion.

[0053] (2) Slowly adding the remaining aqueous phase to the pre-emulsion of step (1), at this time, the oil-water ratio is 1:3, and adding 0.45g AEO-9 (3.0wt%) and 0.075g SDS (0.5wt%) surfactants, the total surfactant HLB value is 14, the shear rate is 6000rpm, and the shear time is 15min; the high-pressure homogenization condition is 40MPa, and the cycle is repeated twice; adding alkali to adjust the pH to 9 to obtain an aqueous emulsion of the thickener;

[0054] (3) Cooling to 40° C., adding nano-silica, antioxidant 1520, ultraviolet absorber nano-zinc dioxide, plasticizer acetyl tributyl citrate and insect attractant to step (2), and high-speed shearing, the shearing speed is 4000 rpm, and the shearing time is 15 min; then adding aqueous film-forming latex, wherein the mass ratio of nano-silica, antioxidant, ultraviolet absorber, plasticizer, aqueous film-forming latex and insect attractant to viscosity enhancer is 5:0.4:0.4:3:35:0.12:15, the aqueous film-forming latex is a mixture of methyl methacrylate latex and glycidyl methacrylate latex in a ratio of 0.25:1, the solid content of the aqueous film-forming latex is 60wt%, and the viscosity is 3800cps. Stirring evenly, and then obtaining environmentally friendly insect glue.

[0055] The obtained environmentally friendly insect glue has a particle size distribution of D90≤1 μm, no stratification after centrifugation (3000 rpm, 30 minutes), and good stability; and can be stored at room temperature for ≥6 months with a solid content of 44.3 wt%.

[0056] Example 5

[0057] This embodiment provides a method for preparing environmentally friendly insect glue, and the preparation steps are as follows:

[0058] (1) 10 g of rosin glycerol ester was heated to 100° C. to melt and 0.1 g (1 wt% rosin glycerol ester) of Span-60 (HLB value 4.7) was added and stirred to form a uniform oil phase. 35 g of deionized water was heated to 70° C. and 1.05 g of thickener xanthan gum was added and stirred to dissolve to obtain a uniform aqueous phase. A portion of the aqueous phase was slowly added to the oil phase at an oil-water ratio of 1.5:1. High shear was applied at a shear rate of 4000 rpm for a shear time of 10 min to form a W / O type pre-emulsion.

[0059] (2) slowly adding the remaining aqueous phase to the pre-emulsion of step (1), at which time the oil-water ratio is 1:5.8, and adding 0.2 g C8 alkyl glycoside (2.0 wt%) and 0.1 g AEO-7 (1.0 wt%) surfactants, the HLB value of the total surfactant is 12.3, the shear rate is 5000 rpm, and the shear time is 20 min; the high-pressure homogenization condition is 20 MPa, and the cycle is repeated 3 times; adding alkali to adjust the pH to 8 to obtain an aqueous emulsion of a thickener;

[0060] (3) Cooling to 60° C., adding nano-silica, antioxidant 1135, ultraviolet absorber nano-titanium dioxide, plasticizer tributyl citrate, silicone defoamer and insect attractant to step (2), high-speed shearing, shearing speed of 3000 rpm, shearing time of 18 min; then adding aqueous film-forming latex, wherein the mass ratio of nano-silica, antioxidant, ultraviolet absorber, plasticizer, aqueous film-forming latex, silicone defoamer, insect attractant and tackifier is 3:0.5:0.4:4:

[0061] 35:0.3:0.05:10, the aqueous film-forming latex is a mixture of ethylene glycol dimethacrylate latex and hydroxyethyl methacrylate latex in a ratio of 1:1, the solid content of the aqueous film-forming latex is 60wt%, the viscosity is 3200cps, and it is stirred evenly to obtain environmentally friendly insect glue. The particle size distribution detected by laser particle size analyzer is: D90≤2μm, centrifugation (3000rpm, 30 minutes) has no stratification, and the stability is good; the solid content is 46.4wt%.

[0062] Example 6

[0063] This embodiment provides a method for preparing environmentally friendly insect glue, and the preparation steps are as follows:

[0064] (1) 8 g of terpene resin was heated to 110° C. to melt and 0.16 g of Span-80 (2 wt% rosin glycerol ester) with an HLB value of 4.6 was added and stirred to form a uniform oil phase. 35 g of deionized water was heated to 80° C. and 1.05 g of thickener xanthan gum was added and stirred to dissolve to obtain a uniform aqueous phase. A portion of the aqueous phase was slowly added to the oil phase at an oil-water ratio of 2:1. High shear was performed at a shear rate of 4000 rpm for a shear time of 10 min to form a W / O type pre-emulsion.

[0065] (2) Slowly adding the remaining aqueous phase to the pre-emulsion of step (1), at which time the oil-water ratio is 1:4.3, and adding 0.136g Tween-80 (1.7wt%) and 0.024g SDS (0.3wt%) surfactants, with an HLB value of 12.55, a shear rate of 70000rpm, and a shear time of 15min; the high-pressure homogenization condition is 40MPa, and the cycle is repeated 3 times; adding alkali to adjust the pH to 9 to obtain an aqueous emulsion of the thickener;

[0066] (3) cooling to 55°C, adding nano silicon dioxide, antioxidant 1520, ultraviolet absorber nano titanium dioxide, plasticizer tributyl citrate and insect attractant to step (2), wherein the insect attractant is a microencapsulated insect attractant with a coverage rate of 90wt%; high-speed shearing, the shearing speed is 3000rpm, and the shearing time is 15min; then adding water-based film-forming latex, wherein nano silicon dioxide, antioxidant, ultraviolet absorber, plasticizer, water-based The mass ratio of film-forming latex, microencapsulated insect attractant and thickener is 3:0.5:0.4:4:25:2:8, the aqueous film-forming latex is hydroxyethyl methacrylate latex, the solid content of the aqueous film-forming latex is 50wt%, the viscosity is 3200cps, and it is stirred evenly to obtain environmentally friendly insect glue. The particle size distribution of the laser particle size analyzer is: D90≤1μm, there is no stratification when centrifuging (3000rpm, 30 minutes), and the stability is good; the solid content is 40wt%.

[0067] Comparative Example 1

[0068] This comparative example uses the method for preparing insect glue provided by patent CN 109169579A to prepare solvent-based insect glue. The difference from Example 1 is that the solvent water is replaced by an organic solvent and no surfactant is added. The steps are as follows:

[0069] Film-forming adhesive: melt a mixture of butyl methacrylate and glycidyl methacrylate in a mass ratio of 1:1 at 130°C using a hot melt method;

[0070] Tackifier mixture: natural rosin as tackifier, xanthan gum as thickener, nano silicon dioxide, antioxidant 1135, nano titanium dioxide as ultraviolet absorber, dioctyl phthalate as plasticizer, and insect attractant are mixed in a mass ratio of 8:0.45:3:0.5:0.3:4:0.2; film-forming glue, solvent gasoline and the tackifier mixture are mixed again in a mass ratio of 15:4:16.45 to obtain insect glue.

[0071] Comparative Example 2

[0072] On the basis of Example 1, the antioxidant was replaced by an equal amount of ultraviolet absorber, and the other formulas and preparation methods were the same as those in Example 1.

[0073] Comparative Example 3

[0074] The difference between this comparative example and Example 1 is that no tackifier is added, and only water-based latex is used as the binder, wherein the tackifier natural rosin is replaced by water-based latex with the same solid content, and no surfactant is added. The remaining steps and formula are the same as those of Example 1. The insect glue prepared by this method is an acrylic emulsion type.

[0075] Performance testing:

[0076] The following methods were used to test the performance of the embodiments and comparative examples, as shown in Table 2:

[0077] Table 2:

[0078] Performance indicators Test Method Gluing viscosity (25℃) Brookfield DV2T Drying time (25℃) GB / T17281989 Adhesion (after 30 days) GB / T48512014 Weather resistance (UV aging) QUV accelerated aging test

[0079] The test results of the embodiments and comparative examples are shown in Table 3:

[0080] Table 3:

[0081]

[0082] By modifying the aqueous system and replacing natural materials, this solution achieves a lower initial viscosity than Example 1, making it easier to apply the glue to form insect-sticking boards and to tear them off for use. While ensuring adequate insect-sticking performance, it also produces no VOCs, achieving an environmentally friendly approach. The present invention also exhibits excellent aging resistance, and compared to Comparative Examples 2 and 3, the synergistic effect of an antioxidant and a UV absorber enhances the aging resistance of the insect-sticking glue.

[0083] Application Examples and Comparative Application Examples

[0084] The environmentally friendly insect glue prepared in Examples 1 and 3 and Comparative Examples 1 and 3 were coated (brushed or sprayed) on the substrate of the insect glue board, and the glue application amount per unit area was 200-250 g / m 2 , the effective solid content is the same; sticky insect board size: 20cm×25cm (yellow / blue two-color laminate), effective insect attractant loading 0.8-1.2g / m2 The insect attractant used was (Z)-8-dodecen-1-ol acetate, used to trap pear borers in orchards. Spatial layout: one trapping site (insect sticky glue board + insect attractant slow-release device) was set up per 20 square meters, with 10 of each type of insect sticky glue board. The average daily number of insects trapped and the percentage of target insects were calculated. These data correspond to Application Example 1, Application Example 3, Comparative Application Example 1, and Comparative Application Example 3, respectively.

[0085] Field application data are shown in Table 4:

[0086] Table 4:

[0087]

[0088] As can be seen from the table above, compared with Example 1 of the present invention, Example 1 uses solvent-based adhesive. Due to problems such as difficulty in applying adhesive, uneven application, and residual organic solvent, the average daily insect attractant yield and target insect number are significantly lower than those of Example 1 of the present invention. Example 3 uses insect attractant microcapsules, which have a better sustained release effect, a long duration, and the highest average daily insect attractant yield. Comparative Application Example 3 uses acrylic latex as a binder. Pure acrylic acid or styrene acrylic latex may soften and flow at high temperatures (>35°C), resulting in failure of the adhesive layer; at low temperatures (<5°C), it may harden and lose viscosity. In Comparative Application Example 3, the viscosity is reduced, and the average daily insect attractant amount and target insects are significantly lower than those in Application Example 1 of the present invention. The rosin-based tackifier in Application Example 1 of the present invention can adjust the viscoelasticity of the colloid, so that it remains stable under different temperatures and humidities; the rosin-based tackifier can enhance the wettability of the colloid, so that it can better adhere to the surface of the pest; acrylic latex may turn yellow or become brittle after long-term exposure to ultraviolet rays, affecting its service life; rosin-based tackifiers (such as hydrogenated rosin) can improve the antioxidant properties of the colloid and delay aging.

[0089] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements, or modifications based on the present invention to solve substantially the same technical problems and achieve substantially the same technical effects are all included in the scope of protection of the present invention.

Claims

1. A method for preparing environmentally friendly insect glue, characterized in that: The steps include: (1) heating and melting a tackifier and adding a nonionic surfactant to stir to form a uniform oil phase; heating deionized water and adding a thickener to dissolve to obtain a uniform aqueous phase; slowly adding a portion of the aqueous phase to the oil phase at an oil-water ratio of 1.5-2.5:1; and high-speed shearing to form a W / O type pre-emulsion; (2) slowly adding the remaining aqueous phase to the pre-emulsion of step (1), adding a surfactant, high-speed shearing and high-pressure homogenization, adding alkali to adjust the pH, and obtaining an aqueous emulsion of the thickener; (3) The aqueous emulsion of step (2) is cooled, nano-silica, antioxidant, ultraviolet absorber, plasticizer and insect attractant are added, sheared at high speed, and then the aqueous film-forming latex is added and stirred evenly to obtain environmentally friendly insect glue.

2. The method for preparing the environmentally friendly insect glue according to claim 1, wherein: In step (1), the tackifier is rosin glycerol ester, natural rosin, disproportionated rosin or terpene resin; the nonionic surfactant is Span-60 and / or Span-80; the thickener is xanthan gum, guar gum or locust bean gum; the amount of the nonionic surfactant is 1-2wt% of the tackifier; and the mass ratio of the thickener to deionized water is 0.1:3-10.

3. The method for preparing the environmentally friendly insect glue according to claim 1 is characterized in that: The heating and melting temperature in step (1) is 100-130° C.; the high-speed shearing conditions are: a shearing speed of 2000-4000 rpm, a time of 10-20 min; and the deionized water is heated at a temperature of 70-80° C.

4. The method for preparing the environmentally friendly insect glue according to claim 1, wherein: The surfactant in step (2) is one or more of C8-C10 alkyl glycoside, AEO-7, AEO-9, Tween-80, sodium fatty acid methyl ester sulfonate and sodium lauryl sulfate, and the amount of the surfactant is 2-3wt% of the viscosity increaser; the pH after adjustment is 8-9.

5. The method for preparing the environmentally friendly insect glue according to claim 1 is characterized in that: In the step (2), the oil-water ratio is 1:4-8, the high-speed shearing condition is 5000-7000 rpm, and the shearing is 15-20 min; the high-pressure homogenization condition is 20-40 MPa, and the cycle is 2-3 times; in the step (3), the temperature is lowered to 40-60°C; the high-speed shearing condition is 2000-4000 rpm, and the shearing is 10-20 min; the mass ratio of the tackifier, nano-silica, antioxidant, ultraviolet absorber, plasticizer, aqueous film-forming latex and insect attractant is 6-15:1-5:0.2-0.5:0.2-0.4:2-4:25-35:0.05-0.

15.

6. The method for preparing the environmentally friendly insect glue according to claim 1, wherein: In the step (3), the particle size of the nano-silica is 20-30 nm; the ultraviolet absorber is nano-titanium dioxide or nano-zinc oxide; the antioxidant includes any one or more of antioxidant 1135 and antioxidant 1520; the plasticizer is dioctyl phthalate, tributyl citrate or acetyl tributyl citrate; and the aqueous film-forming latex is one or more of methyl methacrylate latex, isooctyl acrylate latex, n-butyl acrylate latex, glycidyl methacrylate latex, ethylene glycol dimethacrylate latex and hydroxyethyl methacrylate latex.

7. The method for preparing the environmentally friendly insect glue according to any one of claims 1 to 6, characterized in that: The solid content of the aqueous film-forming latex in the step (3) is 50-60wt%, and the viscosity is 3200-3800cps; or the total solid content in the insect glue system is 35-55wt%; or the insect attractant is one or more of cotton bollworm attractant, peach borer attractant, striped stem borer attractant, fruit fly attractant, tobacco beetle attractant, tobacco powder borer attractant, pear borer attractant and pine sawyer attractant.

8. The method for preparing the environmentally friendly insect glue according to claim 7, wherein: In the step (3), an organosilicon defoamer is further added, and the mass ratio of the organosilicon defoamer to the aqueous film-forming latex is 0.1-0.3:25-35; or the insect attractant is a microencapsulated insect attractant; and the coverage rate of the microencapsulated insect attractant is 90-95wt%.

9. The environmentally friendly insect glue prepared by the method according to any one of claims 1 to 8.

10. Use of the environmentally friendly insect sticky glue according to claim 9 on insect sticky boards.

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