Water-based anti-termite dispersion liquid as well as preparation method and application thereof

Abstract

The invention relates to a water-based anti-termite dispersion liquid as well as a preparation method and application thereof. The water-based anti-termite dispersion liquid is prepared from the following raw materials in percentage by mass: 0.1 to 5 percent of water-based slow-release agent, 0.5 to 20 percent of anti-termite powder and 75 to 99.4 percent of water, the anti-termite powder is of a capsule structure, preparation raw materials of the anti-termite powder comprise matrix resin, a cross-linking agent and an insecticide, and the matrix resin coats the insecticide under the action of the cross-linking agent. According to the water-based sprayable anti-termite dispersion liquid containing the insecticide microcapsules, the release process of drugs in the dispersion liquid is slowed down due to the existence of the slow-release agent, and the anti-termite powder can stably exist in a spraying area for a long time; the insecticide is coated with matrix resin, the special capsule structure can prevent the insecticide from diffusion loss and environmental interference, and the matrix resin and the capsule structure act together, so that the loss of the insecticide is greatly reduced, the pollution is reduced, and the service life is prolonged; the water-based slow-release agent avoids the defects of toxicity, flammability and the like of an organic solvent, is green and environment-friendly, and is easy to industrialize.

Description

Technical Field

[0001] The present application relates to the technical field of wire and cable protection, and in particular to an aqueous anti-ant dispersion liquid and a preparation method and application thereof. Background Art

[0002] Termites are a type of social pest that is widely distributed in tropical and subtropical regions. In the process of foraging and nesting, they can destroy buildings, eat crops, and damage dams, causing serious losses. Wires and cables are usually laid underground or through walls. In this process, if the wood supports or wooden components used are not treated with antiseptics, they are easily bitten by termites. In addition, if the cables pass through natural environments such as trees, forests or grasslands, they may also be attacked by termites. After being bitten by termites, the protective layer of the cable is damaged, which can make the wires and cables damp, resulting in reduced insulation performance, shortened cable service life, and even permanent damage to the cables, resulting in unstable operation of the power system.

[0003] In order to prevent and control ants, people often spray pesticides, but conventional pesticide solutions are unstable and easy to lose. After spreading into the environment, not only the effect is weakened, but also it is easy to cause pollution. At the same time, the pesticide is directly exposed to the outside and is easily disturbed by the environment and quickly decomposes and loses its effect. In order to ensure the uniform dispersion of the pesticide, ordinary pesticide solutions often use organic solvents, which will bring a series of problems such as flammability and toxicity. Summary of the invention

[0004] Based on this, it is necessary to provide an aqueous anti-termite dispersion, which is conducive to the sustained release of drugs, has long-term stability, is difficult to lose, is difficult to fail, and contains no organic solvents. It can prevent termites and other pests from invading cables, thereby extending the service life of cables and ensuring the stable operation of the power system.

[0005] The technical solution of this application is as follows:

[0006] In a first aspect of the present invention, there is provided an aqueous anti-ant dispersion, the raw materials of which include the following components by mass percentage: 0.1%-5% aqueous slow-release agent, 0.5%-20% anti-ant powder, and 75%-99.4% water;

[0007] The anti-ant powder is a microcapsule structure, and its preparation raw materials include base resin, cross-linking agent and insecticide, and the base resin covers the insecticide under the action of the cross-linking agent.

[0008] In one embodiment, the aqueous sustained-release agent is one or more of carboxylated cellulose, pectin, polyvinyl alcohol and polyurethane.

[0009] In one embodiment, the raw materials for preparing the ant-proof powder include the following components by mass percentage: 0.5%-30% insecticide, 66%-99% matrix resin, and 0.5%-4% cross-linking agent.

[0010] In one embodiment, the insecticide is one or more of imidacloprid, bifenthrin, and abamectin; and / or

[0011] The matrix resin is one or more of ethylene-vinyl acetate copolymer, styrene-butadiene-styrene block copolymer, and silicone rubber; and / or

[0012] The cross-linking agent is one or two of dicumyl peroxide and bis(tert-butylperoxyisopropyl)benzene.

[0013] In a second aspect of the present invention, there is provided a method for preparing the aqueous ant-proof dispersion liquid as described above, including the following steps:

[0014] Mix the aqueous sustained-release agent and water to prepare a dispersion liquid;

[0015] Blend the dispersion liquid and the ant-proof powder to prepare the ant-proof dispersion liquid.

[0016] In one embodiment, at least one of the following conditions is satisfied in the blending step:

[0017] (1) The rotation speed is 600 r / min - 2000 r / min;

[0018] (2) The time is 5 min - 10 min.

[0019] In one embodiment, the method for preparing the aqueous ant-proof dispersion liquid further includes the preparation of the ant-proof powder, including the following steps:

[0020] Blend the cross-linking agent, insecticide, and matrix resin, and successively perform pressing, cross-linking, and pulverizing treatments on the obtained mixture to prepare the ant-proof powder.

[0021] In one embodiment, in the preparation step of the ant-proof powder, the blending conditions include: blending for 5 min - 10 min under the conditions of a temperature of 90°C - 110°C and a rotation speed of 50 r / min - 100 r / min; and / or

[0022] The pressing conditions include: pressing for 3 min - 8 min under the conditions of a temperature of 80°C - 150°C and a pressure of 4 MPa - 10 MPa; and / or

[0023] The cross-linking conditions include: cross-linking for 2 min - 8 min under the conditions of a temperature of 150°C - 250°C and a pressure of 4 MPa - 10 MPa.

[0024] In the third aspect of the present invention, there is provided an insect-proof and insecticidal chemical product, and the raw materials for its preparation include the aqueous ant-proof dispersion liquid as described above.

[0025] In the fourth aspect of the present invention, there is provided a cable, including a cable body and the insect-proof and insecticidal chemical product as described above attached to the surface of the cable body.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] The present application provides an aqueous sprayable ant-proof dispersion liquid containing insecticide microcapsules. The ant-proof dispersion liquid is composed of a slow-release agent, ant-proof powder, and water. The presence of the slow-release agent slows down the drug release process in the dispersion liquid, and the ant-proof powder can stably exist in the spraying area for a long time; the insecticide is coated with a matrix resin, and the special capsule structure can prevent the insecticide from diffusing and flowing away and being interfered by the environment. The two work together to greatly reduce the meaningless loss of the insecticide, reduce pollution while extending the service life; the selection of the aqueous slow-release agent avoids the defects of organic solvents such as toxicity and flammability.

[0028] In addition, the present application prepares a sprayable aqueous ant-proof dispersion liquid by a solution blending method. The solution blending method has a simple process, is suitable for large-scale production, and can be well applied in many environments. The preparation method has a simple process, is green and environmentally friendly, and is easy to realize industrial large-scale production, and has a good prospect in the field of ant prevention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0030] Figure 1 Digital photos of the aqueous ant-proof dispersion liquids in Examples 3 - 5; among them, the mass fractions of the ant-proof powder in Figures a, b, and c are 0.6%, 1.2%, and 1.8% respectively.

[0031] Figure 2 SEM images of the aqueous ant-proof dispersion liquids in Examples 3 - 5; among them, the mass fractions of the ant-proof powder in Figures a, b, and c are 0.6%, 1.2%, and 1.8% respectively.

[0032] Figure 3 TGA diagrams of the prepared ant-proof dispersion liquid and the raw materials used in one example.

[0033] Figure 4Digital photo of the water-based ant-proof dispersion prepared in Comparative Example 1.

[0034] Figure 5 SEM image of the water-based ant-proof dispersion prepared in Comparative Example 1. Detailed implementation manners

[0035] The water-based ant-proof dispersion of the present application will be further described in detail below in conjunction with specific embodiments. The present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosed content of the present application more thorough and comprehensive.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the description of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0037] Unless otherwise stated or there is a contradiction, the terms or phrases used herein have the following meanings:

[0038] As used herein, "one or more" refers to any one, any two, or any two or more of the listed items.

[0039] As used herein, the optional scope of "and / or", "or / and", "and / or" includes any one of two or more related listed items, and also includes any and all combinations of the related listed items. The said any and all combinations include any two related listed items, any more related listed items, or the combination of all related listed items. (It should be noted that when at least two conjunctions selected from "and / or", "or / and", "and / or" are used to connect at least three items, it should be understood that in this application, this technical solution undoubtedly includes the technical solution connected by "logical AND", and undoubtedly includes the technical solution connected by "logical OR". For example, "A and / or B" includes three parallel solutions: A, B, and A + B. Another example, the technical solution of "A, and / or, B, and / or, C, and / or, D" includes any one of A, B, C, D (that is, the technical solution connected by "logical OR"), and also includes any and all combinations of A, B, C, D, that is, includes any combination of any two or any three of A, B, C, D, and also includes the four-item combination of A, B, C, D (that is, the technical solution connected by "logical AND").)

[0040] As used herein, "further", "even further", "especially", etc. are used for descriptive purposes and indicate differences in content, but should not be construed as limiting the protection scope of this application.

[0041] In this application, terms such as "first aspect", "second aspect", "third aspect", "fourth aspect", etc. are for descriptive purposes only, and should not be construed as indicating or implying relative importance or quantity, nor as implicitly specifying the importance or quantity of the indicated technical features. In addition, terms such as "first", "second", "third", "fourth", etc. are for non-exhaustive enumerative description purposes only, and should be understood not to constitute a closed limitation on quantity. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. In the description of this application, the meaning of "several" is at least one, such as one, two, etc., unless otherwise specifically defined.

[0042] In this application, when it comes to numerical ranges, unless otherwise specified, the above numerical ranges are considered continuous and include the minimum and maximum values of the range, as well as every value between such minimum and maximum values. Further, when the range refers to integers, it includes every integer between the minimum and maximum values of the range. In addition, when multiple ranges are provided to describe features or characteristics, these ranges can be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all sub-ranges subsumed therein.

[0043] This application specifically discloses only some numerical ranges. However, any lower limit can be combined with any upper limit to form a range not explicitly recited; and any lower limit can be combined with other lower limits to form a range not explicitly recited, and similarly any upper limit can be combined with any other upper limit to form a range not explicitly recited. In addition, each individually disclosed point or single numerical value itself can be used as a lower limit or an upper limit and combined with any other point or single numerical value or with other lower limits or upper limits to form a range not explicitly recited. The use of numerical ranges expressed with endpoints includes all numbers within that range and any range within that range. For example, the range from 1 to 5 includes 1, 1.1, 1.3, 1.5, 2, 2.75, 3, 3.80, 4, and 5, etc.

[0044] In this application, for the percentage content involved, unless otherwise specified, for solid-liquid mixtures and solid-solid mixtures, it refers to mass percentage, and for liquid-liquid mixtures, it refers to volume percentage.

[0045] In this application, for the percentage concentration involved, unless otherwise specified, it refers to the final concentration. The final concentration refers to the proportion of the added component in the system after adding this component.

[0046] The temperature parameters in this application, unless otherwise specified, allow both constant temperature treatment and treatment within a certain temperature range. The constant temperature treatment allows the temperature to fluctuate within the accuracy range controlled by the instrument. Fluctuations within ranges such as ±5°C, ±2°C, ±1°C, ±0.5°C, ±0.4°C, ±0.3°C, ±0.2°C, ±0.1°C are allowed. Normal temperature or room temperature in this application refers to the case where no temperature control operation is applied, generally referring to 4°C to 35°C, preferably 20 ± 5°C.

[0047] In this application, among the technical features described in an open-ended manner, it includes both a closed technical solution composed of the listed features and an open technical solution containing the listed features.

[0048] The capsule structure means that a protective shell is covered outside the drug to protect it from various conditions and avoid failure without affecting the drug's efficacy. At the same time, it cooperates with an aqueous sustained-release agent solution without organic solvents, and the two work together to further extend the drug release time and increase the service life, hopefully achieving the above goals. Organic solvents themselves have certain toxicity and can also dissolve the pesticides inside the capsule, affecting the drug efficacy. For example, insecticides such as imidacloprid are extremely difficult to dissolve in water and are easily soluble in organic solvents such as ethanol and dimethylformamide. Using organic solvents will cause imidacloprid to seep out of the capsule structure, weakening the sustained-release effect and shortening the service life. At the same time, organic solvents are more costly and polluting compared to water.

[0049] Based on this, in order to improve the instability, easy loss, easy failure, and pollution of conventional sprayable ant-proof liquid, the technical personnel of this application proposed, after a large amount of research, to use a sustained-release agent to extend the action period of the ant-proof dispersion liquid and prepared an ant-proof powder with a capsule structure. The two work together to improve stability and extend the service life.

[0050] In the first aspect of the present invention, there is provided an aqueous ant-proof dispersion liquid, the raw materials of which include the following components by mass percentage: 0.1% - 5% aqueous sustained-release agent, 0.5% - 20% ant-proof powder, and 75% - 99.4% water;

[0051] The ant-proof powder is in a microcapsule structure, and its preparation raw materials include a matrix resin, a cross-linking agent, and an insecticide. The matrix resin coats the insecticide under the action of the cross-linking agent.

[0052] Specifically, the ant-proof dispersion liquid described in this application is composed of a slow-release agent, ant-proof powder, and water. The ant-proof powder is prepared from an insecticide and a matrix resin through a specific process. The pre-prepared ant-proof powder with a special capsule structure is uniformly dispersed in the slow-release dispersant in a solution blending manner. The matrix resin of the ant-proof powder shell wraps around the outside of the insecticide in the core layer. This special capsule structure prevents the loss and decomposition of the insecticide. At the same time, the presence of the slow-release agent makes the dispersion liquid more stable and the drug diffusion slower. The combined action of the two makes the dispersion liquid have a more lasting insecticidal effect and a longer service life. In addition, the selection of the aqueous dispersant can avoid the pollution caused by traditional organic solvents. Furthermore, the raw materials of the aqueous ant-proof dispersion liquid may also include other auxiliaries added according to needs in the industry.

[0053] In some examples, the aqueous slow-release agent is one or more of carboxymethyl cellulose, pectin, polyvinyl alcohol, and polyurethane.

[0054] In some examples, the raw materials for preparing the ant-proof powder include the following components by mass percentage: 0.5%-30% insecticide, 66%-99% matrix resin, and 0.5%-4% cross-linking agent.

[0055] In some examples, the insecticide is one or more of imidacloprid, bifenthrin, and abamectin.

[0056] In some examples, the matrix resin is one or more of ethylene-vinyl acetate copolymer, styrene-butadiene-styrene block copolymer, and silicone rubber.

[0057] In some examples, the cross-linking agent is one or two of dicumyl peroxide and 2,5-dimethyl-2,5-di(t-butylperoxy)hexane.

[0058] In the second aspect of the present invention, a preparation method of the aqueous ant-proof dispersion liquid as described above is provided, including the following steps:

[0059] Mix the aqueous slow-release agent and water to prepare a dispersion liquid;

[0060] Blend the dispersion liquid and the ant-proof powder to prepare the ant-proof dispersion liquid.

[0061] In some examples, in the blending step, the rotation speed is 600r / min - 2000r / min. It can be understood that in the blending step, the rotation speed includes but is not limited to 600r / min, 900r / min, 1200r / min, 1500r / min, 1800r / min, 2000r / min.

[0062] In some of these examples, during the blending step, the time is 5 min - 10 min. Understandably, during the blending step, the time includes but is not limited to 5 min, 6 min, 7 min, 8 min, 9 min, 10 min.

[0063] In some of these examples, the method for preparing the aqueous ant-proof dispersion liquid further includes the preparation of ant-proof powder, which includes the following steps:

[0064] Blend the cross-linking agent, insecticide, and matrix resin, and successively perform pressing, cross-linking, and pulverizing on the obtained mixture to prepare ant-proof powder.

[0065] In some of these examples, during the preparation step of the ant-proof powder, the blending conditions include: blending for 5 min - 10 min under the conditions of a temperature of 90°C - 110°C and a rotation speed of 50 r / min - 100 r / min. Understandably, during the preparation step of the ant-proof powder, the blending temperature includes but is not limited to 90°C, 95°C, 100°C, 105°C, 110°C; during the preparation step of the ant-proof powder, the blending rotation speed includes but is not limited to 50 r / min, 60 r / min, 70 r / min, 80 r / min, 90 r / min, 100 r / min; during the preparation step of the ant-proof powder, the blending time includes but is not limited to 5 min, 6 min, 7 min, 8 min, 9 min, 10 min.

[0066] In some of these examples, during the preparation step of the ant-proof powder, the pressing conditions include: pressing for 3 min - 8 min under the conditions of a temperature of 80°C - 150°C and a pressure of 4 MPa - 10 MPa. Understandably, during the preparation step of the ant-proof powder, the pressing temperature includes but is not limited to 80°C, 90°C, 100°C, 110°C, 120°C, 130°C, 140°C, 150°C; understandably, during the preparation step of the ant-proof powder, the pressing pressure includes but is not limited to 4 MPa, 5 MPa, 6 MPa, 7 MPa, 8 MPa, 9 MPa, 10 MPa; understandably, during the preparation step of the ant-proof powder, the pressing time includes but is not limited to 3 min, 4 min, 5 min, 6 min, 7 min, 8 min.

[0067] In some of these examples, in the preparation steps of the ant-proof powder, the cross-linking conditions include: cross-linking for 2 min - 8 min under the conditions of a temperature of 150°C - 250°C and a pressure of 4 MPa - 10 MPa. Understandably, in the preparation steps of the ant-proof powder, the cross-linking temperature includes but is not limited to 150°C, 180°C, 210°C, 240°C, 250°C; in the preparation steps of the ant-proof powder, the cross-linking pressure includes but is not limited to 4 MPa, 5 MPa, 6 MPa, 7 MPa, 8 MPa, 9 MPa, 10 MPa; in the preparation steps of the ant-proof powder, the cross-linking time includes but is not limited to 2 min, 3 min, 4 min, 5 min, 6 min, 7 min, 8 min.

[0068] In the third aspect of the present invention, there is provided an insect-proof and insecticidal chemical product, the preparation raw materials of which include the aqueous ant-proof dispersion liquid as described above.

[0069] In the fourth aspect of the present invention, there is provided a cable, including a cable body and the insect-proof and insecticidal chemical product as described above attached to the surface of the cable body.

[0070] The following is further described in conjunction with specific embodiments. For the raw materials involved in the following specific embodiments, unless otherwise specified, they can all be obtained commercially; for the instruments used, unless otherwise specified, they can all be obtained commercially; for the processes involved, unless otherwise specified, they are all the conventional selections of those skilled in the art.

[0071] The following are specific embodiments.

[0072] Example 1

[0073] S1. 0.4 g of dicumyl peroxide, which is 1% by mass, is blended with 8 g of imidacloprid and 31.6 g of ethylene-vinyl acetate copolymer with a mass ratio of 20:79 at 100°C and 60 r / min for 6 min. After taking it out and cutting it into pieces, a mixture is obtained.

[0074] S2. The mixture obtained in S1 is pressed at 100°C and 6 MPa for 4 min to obtain a preformed sheet.

[0075] S3. The preformed sheet obtained in S2 is cross-linked at 200°C and 6 MPa for 4 min. After taking it out and cutting it into pieces, a cross-linked ant-proof material is obtained.

[0076] S4. Using a low-temperature grinder, the cross-linked ant-proof material obtained in S3 is crushed at -196°C for 30 min to obtain ant-proof powder, 10 g each time.

[0077] S5. Mix 194 g of water with 6 g of carboxymethyl cellulose powder by stirring at 600 r / min to prepare a 3% carboxymethyl cellulose solution. Then, blend 1.51 g of the ant-proof powder obtained in S4 with the carboxymethyl cellulose solution at 600 r / min for 10 min. The mass fraction of the ant-proof powder is 0.75% to obtain the finished ant-proof dispersion.

[0078] Example 2

[0079] S1. Mix 0.8 g of dicumyl peroxide, which is 2% by mass, with 8 g of imidacloprid and 31.2 g of ethylene-vinyl acetate copolymer, with a mass ratio of 20:78, at 100 °C and 60 r / min for 6 min. After taking it out and cutting it into pieces, a mixture is obtained.

[0080] S2. Press the mixture obtained in S1 at 100 °C and 6 MPa for 4 min to obtain a preformed sheet.

[0081] S3. Crosslink the preformed sheet obtained in S2 at 180 °C and 6 MPa for 3 min. After taking it out and cutting it into pieces, a crosslinked ant-proof material is obtained.

[0082] S4. Crush the crosslinked ant-proof material obtained in S3 at -196 °C for 30 min to obtain ant-proof powder, 10 g each time.

[0083] S5. Mix 190 g of water with 10 g of polyvinyl alcohol by stirring at 1200 r / min to prepare a 5% polyvinyl alcohol solution. Then, blend 10.53 g of the ant-proof powder obtained in S4 with the polyvinyl alcohol solution at 1500 r / min for 30 min. The mass fraction of the ant-proof powder is 5% to obtain the finished ant-proof dispersion.

[0084] Example 3

[0085] S1. Mix 0.4 g of dicumyl peroxide, which is 1% by mass, with 8 g of imidacloprid and 31.6 g of ethylene-vinyl acetate copolymer, with a mass ratio of 20:79, at 100 °C and 60 r / min for 6 min. After taking it out and cutting it into pieces, a mixture is obtained.

[0086] S2. Press the mixture obtained in S1 at 100 °C and 6 MPa for 4 min to obtain a preformed sheet.

[0087] S3. Crosslink the preformed sheet obtained in S2 at 180 °C and 6 MPa for 3 min. After taking it out and cutting it into pieces, a crosslinked ant-proof material is obtained.

[0088] S4. Crush the crosslinked ant-proof material obtained in S3 at -196 °C for 30 min to obtain ant-proof powder, 10 g each time.

[0089] S5. Mix 194 g of water with 6 g of powdered carboxymethyl cellulose by stirring at 600 r / min to prepare a 3% carboxymethyl cellulose solution. Then, mix 1.21 g of the ant-proof powder obtained in S4 with the carboxymethyl cellulose solution at 600 r / min for 30 min. The mass fraction of the ant-proof powder is 0.6% to obtain the finished ant-proof dispersion.

[0090] Example 4

[0091] S1. Mix 0.4 g of dicumyl peroxide, which is 1% by mass, with 8 g and 31.6 g of imidacloprid and ethylene-vinyl acetate copolymer in a mass ratio of 20:79 at 100 °C and 60 r / min for 6 min. After taking out, cut it into pieces to obtain a mixture.

[0092] S2. Press the mixture obtained in S1 at 100 °C and 6 MPa for 4 min to obtain a preformed sheet.

[0093] S3. Crosslink the preformed sheet obtained in S2 at 180 °C and 6 MPa for 3 min. After taking out, cut it into pieces to obtain a crosslinked ant-proof material.

[0094] S4. Grind the crosslinked ant-proof material obtained in S3 at -196 °C for 30 min to obtain ant-proof powder, 10 g each time.

[0095] S5. Mix 194 g of water with 6 g of powdered carboxymethyl cellulose by stirring at 600 r / min to prepare a 3% carboxymethyl cellulose solution. Then, mix 2.43 g of the ant-proof powder obtained in S4 with the carboxymethyl cellulose solution at 600 r / min for 30 min. The mass fraction of the ant-proof powder is 1.2% to obtain the finished ant-proof dispersion.

[0096] Example 5

[0097] S1. Mix 0.4 g of dicumyl peroxide, which is 1% by mass, with 8 g and 31.6 g of imidacloprid and ethylene-vinyl acetate copolymer in a mass ratio of 20:79 at 100 °C and 60 r / min for 6 min. After taking out, cut it into pieces to obtain a mixture.

[0098] S2. Press the mixture obtained in S1 at 100 °C and 6 MPa for 4 min to obtain a preformed sheet.

[0099] S3. Crosslink the preformed sheet obtained in S2 at 180 °C and 6 MPa for 3 min. After taking out, cut it into pieces to obtain a crosslinked ant-proof material.

[0100] S4. Crush the cross-linked ant-proof material obtained in S3 at -196°C for 30 min to obtain ant-proof powder, 10 g each time.

[0101] S5. Prepare a 3% carboxymethyl cellulose solution by stirring 194 g of water and 6 g of carboxymethyl cellulose powder at 600 r / min. Then, blend 3.67 g of the ant-proof powder obtained in S4 with the carboxymethyl cellulose solution at 600 r / min for 30 min. The mass fraction of the ant-proof powder is 1.8% to obtain the finished ant-proof dispersion.

[0102] Comparative Example 1

[0103] S1. Blend 0.4 g of diisopropyl peroxide, i.e., 1% by mass, with 8 g of imidacloprid and 31.6 g of ethylene-vinyl acetate copolymer, i.e., in a mass ratio of 20:79, at 100°C and 60 r / min for 6 min. After taking out, cut it into pieces to obtain a mixture.

[0104] S2. Press the mixture obtained in S1 at 100°C and 6 MPa for 4 min to obtain a preformed sheet.

[0105] S3. Cross-link the preformed sheet obtained in S2 at 180°C and 6 MPa for 3 min. After taking out, cut it into pieces to obtain the cross-linked ant-proof material.

[0106] S4. Crush the cross-linked ant-proof material obtained in S3 at -196°C for 30 min to obtain ant-proof powder, 10 g each time.

[0107] S5. Directly blend 1.21 g of the ant-proof powder obtained in S4 with 200 g of water at 600 r / min for 30 min. The mass fraction of the ant-proof powder is 0.6% to obtain an ant-proof dispersion without a slow-release agent.

[0108] Perform performance tests on the ant-proof dispersions prepared in Examples 3 - 5 and Comparative Example 1:

[0109] (1) Take digital photos of the prepared ant-proof dispersions for observation;

[0110] (2) Characterize the prepared ant-proof dispersions by scanning electron microscopy (SEM) after drying;

[0111] (3) Characterize the thermal stability of the products of each example and each comparative example by thermogravimetric analysis (TGA) and record the thermal decomposition temperature of each product.

[0112] The test results are as Figures 1-5 shown. From Figure 1It can be seen that in the ant-proof dispersion liquids prepared in Examples 3 to 5, the ant-proof powder is evenly suspended in the dispersant; while in the ant-proof dispersion liquid prepared in Comparative Example 1 without adding a sustained-release agent, from Figure 4 it can be seen that the ant-proof powder therein has an obvious tendency to agglomerate, and the distribution of the particulate matter in the dispersant is uneven, which is not conducive to the use of the ant-proof dispersion liquid. At the same time, different contents of the ant-proof powder will bring different ant-proof effects and also affect the spraying property of the solution. It can be specifically selected according to the actual conditions during use.

[0113] From Figure 2 it can be seen that a large amount of film-like substances can be seen covering the surface of the particulate matter in the ant-proof dispersion liquids prepared in Examples 3 - 5. The particulate matter seen is the ant-proof powder particles, and the film-like substances are the sustained-release agents. By wrapping the ant-proof powder, the sustained-release agent not only slows down the release of the insecticide but also, to a certain extent, prevents the interference of the external environment on the ant-proof powder. At the same time, the film-like substances can adhere the particulate matter together, indicating that the sustained-release agent has a certain aggregating effect on the ant-proof powder and can reduce the drug diffusion. While in the ant-proof dispersion liquid prepared in Comparative Example 1 without adding a sustained-release agent, from Figure 5 it can be seen that the distribution of the ant-proof powder is isolated from each other and there is no film on the outside, and there is no additional effect to aggregate and wrap the ant-proof powder, which is not conducive to the sustained release of the drug.

[0114] From Figure 3 it can be seen that the mass fractions of the ant-proof powder in the dispersion liquid are 0.6%, 1.2%, and 1.8% respectively, corresponding to Figure 3 the mass fractions after volatilizing the moisture in it are 20%, 30%, and 40% respectively. By comparing the TGA images of the prepared ant-proof dispersion liquid and the raw materials used, it can be seen that the decomposition temperature of carboxymethyl cellulose is lower than that of imidacloprid, resulting in a decrease in the upper limit of the use temperature of the ant-proof dispersion liquid compared with pure imidacloprid, but it still remains above 150°C, and it can maintain the effect of slowing down the drug release at high temperatures and meet most usage situations.

[0115] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0116] The above-described embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims, and the specification can be used to explain the content of the claims.

Claims

1. An aqueous anti-ant dispersion, characterized in that: The raw materials include the following components by mass percentage: 0.1%-5% aqueous slow-release agent, 0.5%-20% anti-ant powder, and 75%-99.4% water; The anti-ant powder is a microcapsule structure, and its preparation raw materials include base resin, cross-linking agent and insecticide, and the base resin covers the insecticide under the action of the cross-linking agent.

2. The aqueous anti-ant dispersion according to claim 1, characterized in that: The aqueous sustained-release agent is one or more of carboxylated cellulose, pectin, polyvinyl alcohol and polyurethane.

3. The aqueous anti-termite dispersion according to claim 1, characterized in that: The raw materials for preparing the anti-ant powder include the following components by mass percentage: 0.5%-30% of insecticide, 66%-99% of base resin, and 0.5%-4% of cross-linking agent.

4. The aqueous anti-termite dispersion according to claim 3, characterized in that: The insecticide is one or more of imidacloprid, bifenthrin and avermectin; and / or The matrix resin is one or more of ethylene-vinyl acetate copolymer, styrene-butadiene-styrene block copolymer and silicone rubber; and / or The cross-linking agent is one or both of diisopropylbenzene peroxide and di-tert-butyl diisopropylbenzene peroxide.

5. A method for preparing the aqueous anti-ant dispersion according to claims 1-4, characterized in that: The following steps are involved: mixing the aqueous sustained-release agent and water to prepare a dispersion; The dispersion and anti-ant powder are blended to prepare the anti-ant dispersion.

6. The method for preparing the aqueous anti-ant dispersion according to claim 5, characterized in that: The step of blending satisfies at least one of the following conditions: (1) The speed is 600r / min-2000r / min; (2) The time is 5 minutes to 10 minutes.

7. The method for preparing the aqueous anti-termite dispersion according to claim 5, characterized in that: The invention also includes the preparation of anti-ant powder, which comprises the following steps: The cross-linking agent, the insecticide and the base resin are mixed, and the obtained mixture is pressed, cross-linked and crushed in sequence to prepare the anti-ant powder.

8. The method for preparing the aqueous anti-termite dispersion according to claim 7, characterized in that: In the preparation step of the anti-ant powder, the blending conditions include: blending for 5 min to 10 min at a temperature of 90° C. to 110° C. and a rotation speed of 50 r / min to 100 r / min; and / or The pressing conditions include: pressing at a temperature of 80°C-150°C and a pressure of 4MPa-10MPa for 3min-8min; and / or The cross-linking conditions include: cross-linking at a temperature of 150° C.-250° C. and a pressure of 4 MPa-10 MPa for 2 min-8 min.

9. An insect repellent and insecticide chemical product, characterized in that: The raw materials for its preparation include the aqueous anti-ant dispersion liquid described in any one of claims 1 to 4.

10. A cable, characterized in that: The invention comprises a cable body, and the insect repellent and insecticide chemical product as claimed in claim 9 attached to the surface of the cable body.

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