A method for preparing a rodent and termite resistant foam

Abstract

The application discloses a preparation method of a rat and termite prevention foam material and relates to the technical field of foam materials. The rat and termite prevention foam material comprises the following raw materials in parts by weight: 20-30 parts of water-based acrylic resin emulsion, 50-70 parts of deionized water, 0.1-1.0 parts of capsaicin, 3-10 parts of an alcohol solvent, 2-5 parts of alkali, 0.1-2 parts of a thickening agent, 1.0-5.0 parts of a surfactant, 0.1-1.0 parts of a slow-release agent, 0.1-1.0 parts of a preservative, 5-20 parts of a propellant, 1-2 parts of melamine, 0.5-1 part of formaldehyde, 3-8 parts of a dispersing agent, 10-20 parts of an arabic gum modified melamine resin prepolymer solution and 3-5 parts of hydrochloric acid. The stimulating odor molecules are encapsulated and wrapped during the preparation process, the stimulating gas volatilization of capsaicin and alkali substances is inhibited, the gas diffusion of the obtained rat and termite prevention foam after spraying is prolonged, the gas molecules are more uniformly dispersed after the preparation of the subsequent rat and termite prevention foam and the spraying of the rat and termite prevention foam to the spraying area, and the rat and termite prevention effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foam materials, in particular to a preparation method of a rat and termite prevention foam. BACKGROUND

[0002] The main prevention and control measures for preventing and controlling rat damage at present include chemical prevention and control, physical prevention and control, biological prevention and control, environmental management and other comprehensive prevention and control methods. Rat damage is everywhere. Because the engine compartment of the car is permeated with a lot of gasoline and is relatively warm, it is easy to become a breeding ground for rats, and various wires in the compartment are the best tools for rats to gnaw. It is a common occurrence that rats gnaw wires in the engine compartment, causing damage to the car, and even traffic accidents caused by gnawed wires. Therefore, people have thought of many methods to prevent rats from entering the car, such as putting rat poison in the car, but the rotten rats after being poisoned will emit a foul odor, and such drugs are highly toxic and should be avoided as much as possible. At the same time, the rotten carcass is more likely to cause a short circuit. Therefore, driving rats away and preventing them from entering the car is the best way to protect the car.

[0003] At present, there are various rat repelling devices on the market, such as ultrasonic buzzer or bionic cat call rat repeller, etc. These rat repelling devices have complex structure and need to modify the car circuit to use. At the same time, such electronic products are high in cost, prone to failure at the car head, short in service life and extremely inconvenient to use. There are also some rat repelling materials applied in other fields on the market, but these materials have poor safety performance and poor persistence of rat repelling odor, and the preparation process of the rat repelling material is relatively complex.

[0004] As disclosed in Chinese Patent Publication No. CN115584169A, a rat-repelling foam for preventing rat bites, through the comprehensive action of various components, causes rats to adhere to their fur and bodies when passing through. Rats use their mouths to lick the rat-repelling aerosol adhering to their bodies. As soon as the rats' mouths come into contact with the rat-repelling aerosol, the capsaicin powder will cause the rats to produce a painful sensation of heat, convulsions and convulsions. The strong pain will drive the rats to escape from the place with the coating of the present application, thereby achieving the purpose of long-term rat repelling.

[0005] However, the above-mentioned foam material sprayed on the car material has the highest concentration of capsaicin gas molecules at the moment of spraying, and the concentration of capsaicin gas molecules gradually decreases over time. Therefore, the duration of rat and termite bite prevention is short. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application provides a preparation method of a rat and termite prevention foam, which solves the problems raised in the above background art.

[0007] To achieve the above object, the application is implemented by the following technical solutions: a preparation method of a rat and termite-proof foam material, the method comprising the following specific steps:

[0008] S1: preliminary reaction; a certain amount of the water-based acrylic resin emulsion, deionized water, capsaicin, alcohol solvent, water-based thickening agent, and surface active agent containing coagulation aid ions are mixed according to the weight component and put into a reaction kettle, the environmental temperature is set to 75-85 DEG C, the hydrolysis reaction time is controlled to 7-8 h, and mechanical stirring is carried out at a rotating speed of 70-100 r / min to obtain a preliminary stimulating rat-proof solution;

[0009] S2: filtration; after the hydrolysis product obtained in S1 is cooled to 40 DEG C, impurities are filtered through a 100-mesh filter screen to obtain a pure hydrolysis solution, and NaOH is added to adjust the PH to weak alkalinity;

[0010] S3: preparation of a prepolymer solution; a certain amount of melamine, formaldehyde, dispersant, and deionized water are sequentially added into a 250-ml three-necked flask, mechanical stirring is carried out at a rotating speed of 40-50 r / min, NaOH is added to adjust the obtained stirring solution to weak alkalinity, and the stirring solution is heated to 60 DEG C until it becomes clear, and then the solution is kept at temperature for 20 min, and then the solution of the arable gum modified melamine resin prepolymer is added to obtain a prepolymer aqueous solution;

[0011] S4: microcapsule coating; a certain amount of the solution of the arable gum modified melamine resin prepolymer and deionized water are added into a 250-ml beaker, high-speed shearing emulsification is started, the hydrolysis product obtained in S2 is added dropwise into the beaker, emulsification and dispersion are carried out for 30 min, then the dispersant is added, and mechanical stirring is carried out to uniformly distribute the hydrolysis product in the solution, the obtained dispersion solution is transferred into a 500-ml three-necked flask, the solution of the arable gum modified melamine resin prepolymer is added, reaction is carried out at room temperature for 10-20 min, hydrochloric acid is added to adjust the pH value, and then the solution is heated to 60 DEG C and reacted for 4 h, the prepolymer is polymerized into a film on the surface of the water molecules in the preliminary stimulating rat-proof solution, the solution is stirred and cooled to room temperature to obtain a stimulating encapsulated particle solution with good fluidity, wherein the particle size of the encapsulated particles is controlled to 1-1000 μm;

[0012] S5: the obtained particle solution is added into C2H6O, NaOH, sodium carboxymethyl cellulose, surfactant, sustained-release agent, C7H5NaO2, C2Cl3F4, and mixed, fast stirring is carried out, and then the solution is solidified at room temperature for 0.2-1 h to obtain a rat-bite-proof mouse-repelling foam;

[0013] The obtained mouse repelling foam comprises the following raw material ratio by weight: 20-30 parts of water-based acrylic resin emulsion, 50-70 parts of deionized water, 0.1-1.0 parts of capsaicin, 3-10 parts of alcohol solvent, 2-5 parts of alkali, 0.1-2 parts of thickening agent, 1.0-5.0 parts of surfactant, 0.1-1.0 parts of slow-release agent, 0.1-1.0 parts of preservative, 5-20 parts of propellant, 1-2 parts of melamine, 0.5-1 part of formaldehyde, 3-8 parts of dispersing agent, 10-20 parts of gum arabic modified melamine resin prepolymer solution, and 3-5 parts of hydrochloric acid.

[0014] The capsaicin has a particle size of 80-120 mesh.

[0015] The alkali comprises NaOH, H 10 NH3·H2O, the alcohol solvent is any one of C2H6O, C3H8O, CH3CHOHCH2OH.

[0016] The surfactant is an ionic surfactant, and the surfactant contains at least one coagulation gel ion of Ca, Cu, Fe and Zn.

[0017] The thickening agent is a water-based thickening agent.

[0018] The preservative is one or more of C7H5NaO2, Na2HPO4 and Na2MoO4.

[0019] The propellant is any one of CCl3F, CH2F2 and C2Cl3F4.

[0020] The gum arabic modified melamine resin prepolymer aqueous solution in S3 comprises the following specific steps: a certain amount of melamine, formaldehyde, dispersing agent and deionized water are sequentially added into a 250ml three-necked flask, mechanical stirring is carried out at 40-50r / min, NaOH is added to adjust the obtained stirring solution to be weakly alkaline, heating is carried out to 60℃ until the obtained stirring solution becomes clear, and then the solution is kept for 20min, the gum arabic modified melamine resin prepolymer solution is added to obtain the prepolymer aqueous solution.

[0021] Compared with the prior art, the beneficial effects of the present application are that by encapsulating the stimulating odor molecules during preparation, the volatilization of capsaicin, alkaline substances and other stimulating gases can be effectively inhibited, the gas dispersion time of the obtained mouse repellent foam after spraying is prolonged, and the physical form of the capsaicin, alcohol and alkaline substance odor molecules can be changed from liquid to quasi-solid state, so that the gas molecules are more uniformly dispersed after the preparation of the mouse repellent foam and after the mouse repellent foam is sprayed to the spraying area, and the mouse and ant repellent effect is improved,

[0022] The metal ions added inside the surfactant realize coagulation aid, increase the stability of capsaicin gas molecules, the water-based acrylic resin emulsion enhances adhesion, the alcohol substance has the effect of solubilizing capsaicin, the alkaline substance can enhance the pungency of capsaicin, and the water-based thickening agent is easily dissolved, so that the mouse will feel hot, painful, convulsive, convulsive and other sensations after contacting the mouse repellent foam. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Flow chart for the preparation method of the mouse and ant repellent foam material;

[0024] Figure 2 C concentration change diagram of NO3 gas molecules in the same space where the mouse repellent foams obtained in example one, example two and example three are placed; 18 H 27 NO3 gas molecule concentration change diagram;

[0025] Figure 3 Data table of the release performance of the mouse repellent foams obtained in example one and example two;

[0026] Figure 4 C concentration change diagram of NO3 gas molecules in the experimental mouse space where the mouse repellent foams obtained in example one, example two and example three are placed; 18 H 27 NO3 gas molecule concentration change diagram;

[0027] Figure 5 C encapsulated in the mouse and ant repellent foam material; 18 H 27 Structure diagram of NO3 gas molecules. DETAILED DESCRIPTION

[0028] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the drawings represent functionally the same or similar elements. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0029] The word "exemplary" used herein means "serving as an example, an implementation, or being illustrative". Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

[0030] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. Those skilled in the art should understand that the present application can also be implemented without certain specific details. In some examples, methods, means, elements well known to those skilled in the art are not described in detail, in order to highlight the main ideas of the present application.

[0031] Referring to Figure 1 Figure 5 The present application provides three technical solutions, a rat and ant-proof foam material, comprising the following raw material ratio by weight: 20-30 parts of water-based acrylic resin emulsion, 50-70 parts of deionized water, 0.1-1.0 parts of capsaicin, 3-10 parts of alcohol solvent, 2-5 parts of alkali, 0.1-2 parts of thickening agent, 1.0-5.0 parts of surfactant, 0.1-1.0 parts of slow-release agent, 0.1-1.0 parts of preservative, 5-20 parts of propellant, 1-2 parts of melamine, 0.5-1 part of formaldehyde, 3-8 parts of dispersing agent, 10-20 parts of gum arabic modified melamine resin prepolymer solution, and 3-5 parts of hydrochloric acid.

[0032] The particle size of the capsaicin is 80-120 mesh.

[0033] The alkali includes at least one of NaOH, H 10 NH3·H2O, the alcohol solvent is any one of C2H6O, C3H8O, CH3CHOHCH2OH.

[0034] The surfactant is an ionic surfactant, and the surfactant contains at least one coagulation aid ion of Ca, Cu, Fe, and Zn inside, and the thickening agent is a water-based thickening agent.

[0035] The thickening agent is a water-based thickening agent.

[0036] The preservative is one or more of C7H5NaO2, Na2HPO4, and Na2MoO4.

[0037] The propellant is selected as any one of CCl3F, CH2F2, and C2Cl3F4.

[0038] The present application also provides a rat and ant-proof foam material preparation method, comprising the following specific steps:

[0039] ​S1: preliminary reaction; a certain amount of the water-based acrylic resin emulsion, deionized water, capsaicin, alcohol solvent, water-based thickening agent, Ca-containing ionic surfactant, and deionized water were mixed according to the weight components and put into a reaction kettle, the environmental temperature was set to 75-85°C, the hydrolysis reaction time was controlled to 7-8h, and mechanical stirring was carried out at a speed of 70-100r / min to obtain a preliminary stimulating rat-proof solution;

[0040] S2: filtration; after the hydrolysis product obtained in S1 was cooled to 40°C, impurities were filtered through a 100-mesh filter screen to obtain a pure hydrolysis solution, and NaOH was added to adjust the pH to weak alkaline;

[0041] S3: preparation of a prepolymer solution; a certain amount of melamine, formaldehyde, a dispersing agent, and deionized water were sequentially added to a 250ml three-necked flask, and mechanical stirring was carried out at a speed of 40-50r / min, NaOH was added to adjust the obtained stirring solution to weak alkaline, and the stirring solution was heated to 60°C until it became clear, and then kept at temperature for 20min, and then an arabic gum modified melamine resin prepolymer solution was added to obtain a prepolymer aqueous solution;

[0042] S4: microcapsule coating; a certain amount of arabic gum modified melamine resin prepolymer solution and deionized water were added to a 250ml beaker, high-speed shearing emulsification was started, the hydrolysis product obtained in S2 was added dropwise into the beaker, emulsification and dispersion were carried out for 30min, a dispersing agent was added, and mechanical stirring was carried out to uniformly distribute the hydrolysis product in the solution, the obtained dispersion solution was transferred to a 500ml three-necked flask, an arabic gum modified melamine resin prepolymer aqueous solution was added, and reaction was carried out at room temperature for 10-20min, hydrochloric acid was added to adjust the pH value, and reaction was carried out at an elevated temperature of 60°C for 4h, the prepolymer was polymerized into a film on the surface of the water molecules in the preliminary stimulating rat-proof solution, stirring was carried out to reduce the temperature to room temperature, and a stimulating encapsulated particle solution with good fluidity was obtained, wherein the particle size of the encapsulated particles was controlled to 1-1000μm; the stimulating odor molecules were encapsulated, which could effectively inhibit the volatilization of stimulating gases such as capsaicin and alkaline substances, improve the volatilization time of the obtained rat-repellent foam after spraying, and change the physical form of the capsaicin, alcohol, and alkaline odor molecules from liquid to quasi-solid state, so that the gas molecules are more uniformly dispersed after the preparation of the rat-repellent foam and after the rat-repellent foam is sprayed to the spraying area;

[0043] S5: the obtained particle solution was added to C2H6O, NaOH, carboxymethyl cellulose sodium, a surfactant, a sustained-release agent, C7H5NaO2, C2Cl3F4, and mixed, and quickly stirred, and then solidified at room temperature for 0.2-1h to obtain a rat-repellent foam for rat bite prevention.

[0044] The preparation process of the S4 arabic gum modified melamine resin prepolymer aqueous solution comprises the following specific steps: a certain amount of melamine, formaldehyde, dispersant and deionized water are sequentially added into a 250ml three-necked flask, mechanical stirring is carried out at 40-50r / min, NaOH is added to adjust the obtained stirring solution to weak alkaline, heating is carried out to 60℃ until the obtained stirring solution becomes clear, and then incubation reaction is carried out for 20min, and then the arabic gum modified melamine resin prepolymer solution is added to obtain the prepolymer aqueous solution.

[0045] Example one:

[0046] The rat and ant-proof foam material comprises the following raw material ratio by weight: 20 parts of water-based acrylic resin emulsion, 50 parts of deionized water, 0.1 part of capsaicin, 3 parts of C2H6O, 2 parts of NaOH, 0.1 part of thickening agent, 3 parts of surfactant, 0.5 part of slow-release agent, 0.5 part of Na2MoO4, 15 parts of CCl3F, 1 part of melamine, 0.5 part of formaldehyde, 5 parts of dispersant, 10 parts of arabic gum modified melamine resin prepolymer solution and 3 parts of hydrochloric acid.

[0047] The surfactant contains Ca ions inside, and the thickening agent is a water-based thickening agent;

[0048] The example also provides a method for preparing the rat and ant-proof foam material, S1: preliminary reaction; a certain amount of the water-based acrylic resin emulsion, deionized water, capsaicin, C2H6O, water-based thickening agent and surfactant containing coagulation gel ions are mixed according to the weight component and put into a reaction kettle, the environmental temperature is set to 75℃, the hydrolysis reaction time is controlled to 7h, and mechanical stirring is carried out at a rotating speed of 70r / min to obtain a preliminary irritating rat-proof solution;

[0049] S2: filtration; after the obtained hydrolysis product in S1 is cooled to 40℃, impurities are filtered through a 100 mesh filter screen to obtain a pure hydrolysis solution, and NaOH is added to adjust the PH to weak alkaline;

[0050] S3: preparation of prepolymer solution; a certain amount of melamine, formaldehyde, dispersant and deionized water are sequentially added into a 250ml three-necked flask, mechanical stirring is carried out at 40r / min, NaOH is added to adjust the obtained stirring solution to weak alkaline, heating is carried out to 60℃ until the obtained stirring solution becomes clear, and then incubation reaction is carried out for 20min, and then the arabic gum modified melamine resin prepolymer solution is added to obtain the prepolymer aqueous solution;

[0051] S4: microcapsule coating; a certain amount of arabic gum modified melamine resin prepolymer solution, deionized water is added into 250ml beaker, open high-speed shearing emulsification, the hydrolysis product obtained in S2 is added dropwise into the beaker, emulsification and dispersion for 30min, then the dispersing agent is added, and the hydrolysis product is uniformly distributed in the solution by mechanical stirring, the obtained dispersion solution is transferred into a 500ml three-necked flask, arabic gum modified melamine resin prepolymer aqueous solution is added, and the reaction is carried out at room temperature for 10min, hydrochloric acid is added to adjust the pH value, and the reaction is carried out at 60℃ for 4h, the prepolymer is polymerized into a film on the surface of the water molecules of the preliminary stimulating rat-proof solution, the stirring is cooled to room temperature, and the stimulating encapsulated particle solution with good fluidity is obtained, wherein the particle size of the encapsulated particles is controlled in the range of 1-1000μm;

[0052] S5: the obtained particle solution is added into C2H6O, NaOH, surfactant, slow-release agent, C2H6O and C2Cl3F4, and mixed and quickly stirred, and the foam for rat bite prevention is obtained after solidification at room temperature for 0.5h.

[0053] The preparation process of the arabic gum modified melamine resin prepolymer aqueous solution in S4 includes the following specific steps: a certain amount of melamine, formaldehyde, dispersing agent and deionized water are sequentially added into a 250ml three-necked flask, and mechanical stirring is carried out at 40-50r / min, NaOH is added to adjust the obtained stirring solution to weak alkalinity, the stirring solution is heated to 60℃ until the stirring solution becomes clear, and then the temperature is kept for 20min, and then the arabic gum modified melamine resin prepolymer solution is added to obtain the prepolymer aqueous solution A.

[0054] Example two:

[0055] The rat-proof and ant-proof foam material includes the following raw material ratio by weight: 25 parts of water-based acrylic resin emulsion, 60 parts of deionized water, 0.5 parts of capsaicin, 5 parts of C2H6O, 3 parts of NaOH, 1 part of thickening agent, 3 parts of surfactant, 0.5 part of slow-release agent, 0.5 part of Na2MoO4, 15 parts of CCl3F, 1.5 parts of melamine, 0.8 part of formaldehyde, 5 parts of dispersing agent, 15 parts of arabic gum modified melamine resin prepolymer solution and 4 parts of hydrochloric acid.

[0056] The surfactant contains Ca ions inside, and the thickening agent is a water-based thickening agent;

[0057] The example also provides a method for preparing the rat-proof and ant-proof foam material, S1: preliminary reaction; a certain amount of the water-based acrylic resin emulsion, deionized water, capsaicin, C2H6O, water-based thickening agent and surfactant containing coagulation aid ions are mixed according to the weight components and put into a reaction kettle, the environmental temperature is set to 75℃, the hydrolysis reaction time is controlled to 7h, and mechanical stirring is carried out at a rotating speed of 70r / min to obtain a preliminary stimulating rat-proof solution;

[0058] S2: filtering; after the hydrolysis product obtained in S1 is cooled to 40°C, impurities are filtered through a 100-mesh filter screen to obtain a pure hydrolysis solution, and NaOH is added to adjust the pH to weak alkalinity;

[0059] S3: preparing a prepolymer solution; a certain amount of melamine, formaldehyde, dispersant and deionized water are sequentially added into a 250-ml three-necked flask, mechanical stirring is carried out at 40 r / min, NaOH is added to adjust the obtained stirring solution to weak alkalinity, and the obtained stirring solution is heated to 60°C until it becomes clear, and then incubated for 20 min, and then the solution of the arabic gum modified melamine resin prepolymer is added to obtain a prepolymer aqueous solution;

[0060] S4: microcapsule coating; a certain amount of the solution of the arabic gum modified melamine resin prepolymer, deionized water is added into a 250-ml beaker, high-speed shearing emulsification is started, the hydrolysis product obtained in S2 is added dropwise into the beaker, emulsification and dispersion are carried out for 30 min, then the dispersant is added, and mechanical stirring is carried out to uniformly disperse the hydrolysis product in the solution, the obtained dispersion solution is transferred into a 500-ml three-necked flask, the solution of the arabic gum modified melamine resin prepolymer is added, reaction is carried out at room temperature for 10 min, hydrochloric acid is added to adjust the pH value, and then the temperature is increased to 60°C and reaction is carried out for 4 h, the prepolymer is polymerized into a film on the surface of the water molecules of the initial irritant rat-proof solution, stirring is carried out to reduce the temperature to room temperature, and then an irritant encapsulated particle solution with good fluidity is obtained, wherein the particle size of the encapsulated particles is controlled to be 1-1000 μm;

[0061] S5: the obtained particle solution is added into C2H6O, NaOH, surfactant, slow-release agent, C2H6O and C2Cl3F4, and mixed, fast stirring is carried out, and then solidification is carried out at room temperature for 0.5 h, and then a rat-bite-proof rat-repelling foam is obtained.

[0062] The preparation process of the solution of the arabic gum modified melamine resin prepolymer in S4 comprises the following specific steps: a certain amount of melamine, formaldehyde, dispersant and deionized water are sequentially added into a 250-ml three-necked flask, mechanical stirring is carried out at 40-50 r / min, NaOH is added to adjust the obtained stirring solution to weak alkalinity, and then the obtained stirring solution is heated to 60°C until it becomes clear, and then incubated for 20 min, and then the solution of the arabic gum modified melamine resin prepolymer is added to obtain a prepolymer aqueous solution B.

[0063] Example Three

[0064] The application further provides a rat-ant-proof foam material which is not microencapsulated, comprising the following raw materials in parts by weight: 25 parts of water-based acrylic resin emulsion, 60 parts of deionized water, 0.5 parts of capsaicin, 5 parts of C2H6O, 3 parts of NaOH, 1 part of thickening agent, 3 parts of surfactant, 0.5 part of slow-release agent, 0.5 part of Na2MoO4, and 15 parts of CCl3F.

[0065] The thickening agent is an aqueous thickening agent;

[0066] The preparation method of the above non-microencapsulated rat and ant-proof foam material includes the following specific steps:

[0067] S1: The following raw materials are weighed according to the weight ratio: 25 parts of aqueous acrylic resin emulsion, 60 parts of deionized water, 0.5 parts of capsaicin, 5 parts of C2H6O, 1 part of NaOH, 1 part of thickening agent, 3 parts of surfactant, 0.5 parts of slow-release agent, 0.5 parts of Na2MoO4, and 15 parts of CCl3F.

[0068] S2: Mix the aqueous acrylic resin emulsion, deionized water, capsaicin, C2H6O, NaOH, thickening agent, surfactant, slow-release agent, Na2MoO4, and CCl3F, and stir quickly. Curing at room temperature for 0.5 h, the rat-proof foam C for preventing rat bites is obtained.

[0069] The rat-proof foams A, B, and C obtained in Examples 1, 2, and 3 are respectively sprayed onto the surfaces of the same electric wire and cable. After being stationary and stably attached, the three groups of electric wire and cable that have been sprayed are placed in an open container, a measuring sensor is arranged inside, and the concentration of capsaicin-C 18 H 27 NO3 gas molecules in the container is monitored in real time by a gas detector, as shown in the attached Figure 2

[0070] As shown in the attached Figure 2 18 H 27 NO3 gas molecules are not encapsulated, and therefore quickly escape, so the rat-proof effect before 23 d is much better than that of the rat-proof foams A and B. After 23 d, the concentration of gas molecules in the area sprayed by the rat-proof foam C quickly decreases, which is because the gas molecules of the rat-proof foam C escape too quickly. Therefore, it is estimated that the rat-proof effect of the rat-proof foam C lasts about 45 d, while most of the gas molecules of the rat-proof foams A and B are encapsulated, and the gas molecules are released slowly, so the rat-proof effect is more durable.

[0071] The rat-proof foams A and B obtained in Examples 1 and 2 are respectively weighed and placed in a conical flask, and then placed in an oven at 50℃ for 30 min. The weight loss of the foams A and B is monitored to judge the release performance of the rat-proof foams A and B, and the mass loss rate is represented.

[0072] Mass loss rate ​​M = product mass (g), M n is the product mass on the nth day, ω% is the capsaicin mass content, and the experimental results are shown in Table 1. Figure 3 As shown in Table 2, it can be seen that the release performance of Mouse Repellent Foam A and Mouse Repellent Foam B under different raw material ratios is close, and the stability of the mouse repellent effect is close.

[0073] Mouse Repellent Foam A, Mouse Repellent Foam B, and Mouse Repellent Foam C obtained in Example 1, Example 2, and Example 3 were respectively sprayed onto the surface of the same electric wire and cable. After being static to a stable adhesion state, the three groups of electric wire and cable that had been sprayed were placed in an open vessel, a measuring sensor was arranged inside, and the concentration of C 18 H 27 NO3 gas molecules in the closed vessel was monitored in real time by a gas detector. Finally, the experimental mouse was placed in the open vessel.

[0074] C 18 H 27 NO3 gas molecules in the closed vessel was monitored in real time by a gas detector. Finally, the experimental mouse was placed in the open vessel. Figure 4 As shown in Table 3, it can be seen that Mouse Repellent Foam C sprayed on the electric wire and cable has a strong irritating odor at the initial concentration of C 18 H 27 NO3 gas molecules. During this process, the experimental mouse did not approach the electric wire and cable, but after 50 days, the irritating odor was inhaled by the experimental mouse and naturally volatilized, and the experimental mouse began to approach the electric wire and cable.

[0075] Mouse Repellent Foam A and Mouse Repellent Foam B sprayed on the electric wire and cable, because the initial concentration of C 18 H 27 NO3 gas molecules is not high, the experimental mouse gradually approaches the electric wire and cable between 0-10 days. The experimental mouse of Example 2 group contacts the surface of the electric wire and cable at the node of 10 days, and the experimental mouse of Example 1 group contacts the surface of the electric wire and cable at 2 days. At this time, the C 18 H 27 NO3 gas molecules encapsulated in the foam are released by touching or biting, and the effect of capsaicin will make the mouse produce a painful feeling of fever, spasm, and convulsion, and it will not approach the electric wire and cable in a short time. After the mouse tries to contact again, the encapsulated C 18 H 27 NO3 gas molecules are released again, and the mouse is stimulated by capsaicin again, so that the experimental mouse produces inertial memory, and according to Table 4, it can be seen that the gas molecules are released slowly, and the mouse repellent effect is more durable. Figure 4

[0076] ​It is to be understood that the terminology used herein such as first and second, and the like, is only used to distinguish one entity or action from another entity or action, and does not necessarily require or imply any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0077] While embodiments of the present application have been shown and described with reference to particular embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application. The scope of the application is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a rat and ant-proof foam material, characterized in that: The method comprises the following specific steps: S1: Preliminary reaction: a certain amount of water-based acrylic resin emulsion, deionized water, capsaicin, alcohol solvent, water-based thickener, and surfactant containing gelling ions are mixed by weight and placed in a reaction kettle. The ambient temperature is set at 75°C-85°C, the hydrolysis reaction time is controlled at 7h-8h, and the speed is controlled at 70-100r / min for mechanical stirring to obtain a preliminary irritating rodent-proofing solution. S2: Filtration; After the hydrolyzate obtained in S1 is cooled to 40°C, impurities are filtered through a 100-mesh filter to obtain a pure hydrolyzed solution, and NaOH is added to adjust the pH to a weak alkaline state; S3: Preparing a prepolymer solution: In a 250 ml three-necked flask, a certain amount of melamine, formaldehyde, dispersant, and deionized water were sequentially added, and mechanically stirred at 40-50 r / min. NaOH was added to adjust the stirred solution to a weak alkalinity, and the solution was heated to 60°C until the stirred solution became clear. The mixture was kept warm for 20 minutes, and a gum arabic modified melamine resin prepolymer solution was added to obtain a prepolymer aqueous solution. S4: microcapsule coating; a certain amount of gum arabic modified melamine resin prepolymer solution and deionized water are added to a 250ml beaker, high-speed shear emulsification is started, and the hydrolyzate obtained in S2 is added dropwise to the beaker. After emulsification and dispersion for 30 minutes, a dispersant is added, and mechanical stirring is used to uniformly disperse the hydrolyzate in the solution. The resulting dispersed solution is transferred to a 500ml three-necked flask, and the gum arabic modified melamine resin prepolymer aqueous solution is added. The reaction is carried out at room temperature for 10-20 minutes, and hydrochloric acid is added to adjust the pH value. The temperature is raised to 60°C and the reaction is carried out for 4 hours. The prepolymer polymerizes into a film on the surface of the water molecules of the preliminary irritating rodent-proofing solution. The solution is stirred and cooled to room temperature to obtain a stimulating encapsulated particle solution with good fluidity, wherein the particle size of the encapsulated particles is controlled to be 1-1000μm; S5: adding C2H6O, NaOH, sodium carboxymethyl cellulose, surfactant, sustained-release agent, C7H5NaO2, and C2Cl3F4 to the obtained particle solution, mixing, rapidly stirring, and curing at room temperature for 0.2 to 1 hour to obtain a rodent repellent foam for preventing rodent bites; The obtained rat repellent foam comprises the following raw materials in parts by weight: 20-30 parts of water-based acrylic resin emulsion, 50-70 parts of deionized water, 0.1-1.0 parts of capsaicin, 3-10 parts of alcohol solvent, 2-5 parts of alkali, 0.1-2 parts of thickener, 1.0-5.0 parts of surfactant, 0.1-1.0 parts of sustained-release agent, 0.1-1.0 parts of preservative, 5-20 parts of propellant, 1-2 parts of melamine, 0.5-1 parts of formaldehyde, 3-8 parts of dispersant, 10-20 parts of gum arabic modified melamine resin prepolymer solution, and 3-5 parts of hydrochloric acid.

2. The method for preparing a rat and ant-proof foam material according to claim 1, wherein: The particle size of the capsaicin is 80-120 meshes.

3. The method for preparing a rat and ant-proof foam material according to claim 1, wherein: The base includes NaOH, H 10 At least one of Na2O8Si and NH3·H2O, and the alcohol solvent is any one of C2H6O, C3H8O, and CH3CHOHCH2OH.

4. The method for preparing a rat and ant-proof foam material according to claim 1, wherein: The surfactant is an ionic surfactant, and the surfactant contains at least one co-gelling ion of Ca, Cu, Fe, and Zn.

5. The method for preparing a rat and ant-proof foam material according to claim 1, wherein: The thickener is an aqueous thickener.

6. The method for preparing a rat and ant-proof foam material according to claim 1, wherein: The preservative is one or more of C7H5NaO2, Na2HPO4, and Na2MoO4.

7. The method for preparing a rat and ant-proof foam material according to claim 1, wherein: The propellant is selected from any one of CCl3F, CH2F2, and C2Cl3F4.

8. The method for preparing a rat and ant-proof foam material according to claim 1, characterized in that: The preparation process of the melamine resin prepolymer aqueous solution modified with gum arabic in S3 includes the following specific steps: adding a certain amount of melamine, formaldehyde, a dispersant and deionized water in sequence into a 250 ml three-necked flask, mechanically stirring at 40-50 r / min, adding NaOH to adjust the stirred solution to a weak alkaline state, heating to 60° C. until the stirred solution becomes clear, keeping the temperature for reaction for 20 minutes, and adding the melamine resin prepolymer solution modified with gum arabic to obtain a prepolymer aqueous solution.

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