Anti-termite powder as well as preparation method and application thereof

Abstract

The invention relates to anti-termite powder as well as a preparation method and application thereof. The anti-termite powder provided by the invention is prepared from the following components in parts by mass: 66 to 99.4 parts of resin matrix, 0.1 to 30 parts of anti-termite agent and 0.5 to 4 parts of cross-linking agent, the anti-termite agent is coated with the resin matrix. The anti-termite powder comprises the following components in parts by mass: 66-99.4 parts of a resin matrix, 0.1-30 parts of an anti-termite agent and 0.5-4 parts of a cross-linking agent, and meanwhile, the anti-termite agent is coated by the matrix resin, so that the decomposition of the anti-termite agent in the high-temperature processing process of the cable and the loss of the anti-termite agent in the working process can be reduced. The anti-termite powder is good in high temperature resistance, long in effective time and suitable for effectively protecting the cable for a long time.

Description

Technical Field

[0001] This application relates to the technical field of insect-proof products, and particularly to an anti-termite powder, a preparation method thereof, and an application thereof. Background Art

[0002] During their daily activities, termites may gnaw on the outer skin of cables, resulting in a decline in the insulation, waterproofing, and other properties of the cable cortex, severely reducing the service life of the cable and causing great economic losses. The traditional method for preventing termites in cables is to directly add anti-termite drugs to the cable cortex. However, the cable outer skin requires high-temperature processing, which can cause the volatilization and decomposition of the anti-termite agent, and the anti-termite drug is quickly lost in the natural environment, providing a short protection time for the cable. Summary of the Invention

[0003] Based on this, it is necessary to provide an anti-termite powder, a preparation method thereof, and an application thereof to solve the problems raised in the above background art.

[0004] In a first aspect, this application provides an anti-termite powder, comprising the following components in parts by mass: 66 parts to 99.4 parts of a resin matrix, 0.1 part to 30 parts of an anti-termite agent, and 0.5 part to 4 parts of a cross-linking agent; the resin matrix coats the anti-termite agent.

[0005] In some embodiments, the resin matrix comprises at least one of ethylene-vinyl acetate copolymer, styrene-butadiene-styrene block copolymer, styrene-ethylene-butadiene block copolymer, and polyolefin elastomer.

[0006] In some embodiments, the anti-termite agent comprises at least one of imidacloprid, bifenthrin, and abamectin.

[0007] In some embodiments, the cross-linking agent comprises at least one of dicumyl peroxide and 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane.

[0008] In some embodiments, the anti-termite powder comprises the following components in mass percentages: 66% to 99.4% of the resin matrix, 0.1% to 30% of the anti-termite agent, and 0.5% to 4% of the cross-linking agent.

[0009] In some embodiments, the particle size of the anti-termite powder is 30 μm to 300 μm.

[0010] In a second aspect, this application provides a preparation method of an anti-termite powder, comprising the following steps:

[0011] Melting and blending a resin matrix in an amount of 66 parts to 99.4 parts, an anti-termite agent in an amount of 0.1 part to 30 parts, and a cross-linking agent in an amount of 0.5 part to 4 parts by mass respectively to obtain a first mixed material;

[0012] Subject the mixed material to a crosslinking reaction to obtain a second mixed material;

[0013] Perform grinding treatment on the second mixed material;

[0014] Wherein, the temperature of the melt blending is lower than the temperature of the crosslinking reaction.

[0015] In some embodiments, the temperature of the melt blending is 80°C to 120°C.

[0016] In some embodiments, the time of the melt blending is 6 min to 10 min.

[0017] In some embodiments, the temperature of the crosslinking reaction is 170°C to 210°C.

[0018] In some embodiments, the time of the crosslinking reaction is 3 min to 10 min.

[0019] In some embodiments, the temperature of the grinding treatment is -196°C to -70°C.

[0020] In some embodiments, the frequency of the grinding treatment is 30 Hz to 70 Hz.

[0021] In some embodiments, after obtaining the first mixed material and before subjecting the mixed material to a crosslinking reaction, the following steps are further included:

[0022] Perform a pressing and forming treatment on the first mixed material; and / or,

[0023] After performing the grinding treatment on the second mixed material, the following steps are further included:

[0024] Perform a drying treatment on the material after the grinding treatment.

[0025] In a third aspect, the present application provides a cable, including a core layer and a cortical layer, the cortical layer being disposed on the periphery of the core layer; the cortical layer includes the ant-proof powder according to any one of the above, or the ant-proof powder prepared by the preparation method of the ant-proof powder according to any one of the above.

[0026] The above ant-proof powder includes the following components in parts by mass: 66 parts to 99.4 parts of a resin matrix, 0.1 part to 30 parts of an ant-proof agent, and 0.5 part to 4 parts of a crosslinking agent. At the same time, the ant-proof agent is coated by the matrix resin, which can reduce the decomposition of the ant-proof agent during the high-temperature processing of the cable and the loss of the ant-proof agent during the working process. This ant-proof powder has good high-temperature resistance and a long effective time, and is suitable for effectively protecting the cable for a long time.

[0027] Furthermore, the ant-proof powder is easy to be prepared into powders with smaller particle sizes and is easily dispersed in the cortex of the cable. The production process is simple, without the use of organic solvents and the generation of waste liquid, which is green and environmentally friendly. Description of the Drawings

[0028] Figure 1 SEM image of the ant-proof powder prepared in Example 1 of the present application;

[0029] Figure 2 Schematic diagram of the results of EDS scanning of chlorine element in the ant-proof powder prepared in Example 1 of the present application;

[0030] Figure 3 Thermogravimetric curves of imidacloprid, ethylene-vinyl acetate copolymer, and imidacloprid@ethylene-vinyl acetate copolymer in Example 1 of the present application;

[0031] Figure 4 Hardness comparison chart of crosslinked imidacloprid@ethylene-vinyl acetate copolymer in Example 1 and Example 2 of the present application. Detailed Description of the Embodiments

[0032] In order to make the above objects, features, and advantages of the present application more obvious and understandable, the following provides a detailed description of the specific embodiments of the present application. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

[0035] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0036] In this application, unless otherwise clearly defined and limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] An embodiment of this application provides an anti - ant powder, which comprises the following components in parts by mass: 66 parts to 99.4 parts of a resin matrix, 0.1 part to 30 parts of an anti - ant agent, and 0.5 part to 4 parts of a cross - linker; the resin matrix coats the anti - ant agent.

[0038] The above - mentioned anti - ant powder comprises the following components in parts by mass: 66 parts to 99.4 parts of a resin matrix, 0.1 part to 30 parts of an anti - ant agent, and 0.5 part to 4 parts of a cross - linker. At the same time, the anti - ant agent is coated by the matrix resin, which can reduce the decomposition of the anti - ant agent during the high - temperature processing of the cable and the loss of the anti - ant agent during the working process. This anti - ant powder has good high - temperature resistance and a long effective time, and is suitable for the long - term effective protection of cables.

[0039] Furthermore, this anti - ant powder is convenient to prepare powders with smaller particle sizes and is easily dispersed in the cortex of the cable. The production process is simple, without the use of organic solvents and the generation of waste liquid, which is green and environmentally friendly.

[0040] Optionally, the mass fraction of the resin matrix in the anti - ant powder is 66 parts, 68 parts, 70 parts, 72 parts, 74 parts, 76 parts, 78 parts, 80 parts, 82 parts, 85 parts, 88 parts, 90 parts, 92 parts, 94 parts, 96 parts, 98 parts, 99 parts or 99.4 parts. Or, the mass fraction of the resin matrix in the anti - ant powder can also be within the range between any two of the above - mentioned mass fractions.

[0041] When the mass fraction of the anti-ant agent in the anti-ant powder is too low, the anti-ant effect of the anti-ant powder is relatively limited. When the mass fraction of the anti-ant agent in the anti-ant powder is too high, it is difficult to achieve a good coating effect of the resin matrix on the anti-ant agent. Optionally, the mass fraction of the anti-ant agent in the anti-ant powder is 0.1 parts, 0.2 parts, 0.5 parts, 1 parts, 2 parts, 5 parts, 8 parts, 10 parts, 12 parts, 15 parts, 18 parts, 20 parts, 22 parts, 25 parts, 28 parts or 30 parts, or the mass fraction of the anti-ant agent in the anti-ant powder can also be within the range between any two of the above mass fractions.

[0042] When the mass fraction of the cross-linking agent in the anti-ant powder is too low, the cross-linking effect of the resin matrix is ​​limited, and it is difficult to achieve a good coating effect of the resin matrix on the anti-ant agent. When the mass fraction of the cross-linking agent in the anti-ant powder is too high, the hardness of the anti-ant powder will be low, and it will be difficult to obtain an anti-ant powder with a smaller particle size through grinding, resulting in a poor dispersion effect of the anti-ant powder in the cable cortex. Optionally, the mass fraction of the cross-linking agent in the anti-ant powder is 0.5 parts, 1 parts, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts or 4 parts, or the mass fraction of the cross-linking agent in the anti-ant powder can also be within the range between any two of the above mass fractions.

[0043] In some of the embodiments, the resin matrix includes at least one of ethylene-vinyl acetate copolymer, styrene-butadiene-styrene block copolymer, styrene-ethylene-butadiene block copolymer and polyolefin elastomer.

[0044] Directly coating the anti-termite agent with a flexible resin will make grinding difficult and it is difficult to prepare anti-termite powder with a small particle size, which will result in poor dispersion of the anti-termite powder in the cable cortex. The above-mentioned resin matrix can achieve a good coating effect on the anti-termite agent while also facilitating grinding to obtain anti-termite powder with a small particle size, which is convenient for dispersion of the anti-termite powder in the cable cortex.

[0045] In some embodiments, the anti-termite agent includes at least one of imidacloprid, bifenthrin and avermectin.

[0046] In some embodiments, the crosslinking agent includes at least one of dicumyl peroxide and di-tert-butyl dicumyl peroxide.

[0047] In some embodiments, the anti-termite powder includes the following components in percentage by mass: 66% to 99.4% of a resin matrix, 0.1% to 30% of an anti-termite agent, and 0.5% to 4% of a cross-linking agent.

[0048] Optionally, the mass percentage of the resin matrix in the anti-ant powder is 66, 68, 70, 72, 74, 76, 78, 80, 82, 85, 88, 90, 92, 94, 96, 98, 99 or 99.4 parts, or, the mass percentage of the resin matrix in the anti-ant powder may also be within the range between any two of the above mass percentages.

[0049] Optionally, the mass percentage of the anti-termite agent in the anti-termite powder is 0.1 parts, 0.2 parts, 0.5 parts, 1 parts, 2 parts, 5 parts, 8 parts, 10 parts, 12 parts, 15 parts, 18 parts, 20 parts, 22 parts, 25 parts, 28 parts or 30 parts, or, the mass percentage of the anti-termite agent in the anti-termite powder can also be within the range between any two of the above mass percentages.

[0050] Optionally, the mass percentage of the crosslinking agent in the anti-termite powder is 0.5 parts, 1 parts, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts or 4 parts, or the mass percentage of the crosslinking agent in the anti-termite powder can also be within the range between any two of the above mass percentages.

[0051] In some of the embodiments, the anti-termite powder comprises, by mass percentage, 66% to 99.4% of a resin matrix, 0.1% to 30% of an anti-termite agent, and 0.5% to 4% of a cross-linking agent.

[0052] In some embodiments, the particle size of the anti-ant powder is 30 μm to 300 μm.

[0053] Optionally, the particle size of the anti-termite powder is 30 μm, 40 μm, 50 μm, 80 μm, 100 μm, 120 μm, 150 μm, 200 μm, 250 μm or 300 μm, or the particle size of the anti-termite powder may also be within the range between any two of the above particle sizes.

[0054] Another embodiment of the present application provides a method for preparing an anti-ant powder, comprising the following steps:

[0055] Melt-blending 66 to 99.4 parts by weight of a resin matrix, 0.1 to 30 parts by weight of an anti-termite agent, and 0.5 to 4 parts by weight of a cross-linking agent to obtain a first mixed material;

[0056] allowing the mixed material to undergo a cross-linking reaction to obtain a second mixed material;

[0057] Grinding the second mixed material;

[0058] The temperature of melt blending is lower than the temperature of cross-linking reaction.

[0059] In the preparation method of the above-mentioned anti-ant powder, the resin matrix, the anti-ant agent and the cross-linking agent are first blended at a relatively low temperature while the resin matrix is ​​melted but not cross-linked, so as to achieve a relatively uniform mixing and coating effect, and then cross-linked at a higher temperature, and finally ground to prepare the product into powder. Compared with the traditional preparation method of anti-ant powder, the anti-ant powder prepared by the above-mentioned preparation method has a better coating effect of the resin matrix on the anti-ant agent, and the particle size of the anti-ant powder is smaller and the dispersibility is better. The preparation method is simple in system, fast in process, and free of pollutants such as organic solvents, and has a broad application space in the field of anti-ant of cable cortex.

[0060] In some embodiments, the melt blending temperature is 80°C to 120°C.

[0061] Optionally, the temperature of melt blending is 80°C, 85°C, 90°C, 95°C, 100°C, 105°C, 110°C, 115°C or 120°C, or, the temperature of melt blending may also be within the range between any two of the above temperatures.

[0062] In some embodiments, the melt blending time is 6 min to 10 min.

[0063] Optionally, the melt blending time is 6 min, 7 min, 8 min, 9 min or 10 min, or, the melt blending time may also be within the range between any two of the above times.

[0064] In some embodiments, the temperature of the cross-linking reaction is 170°C to 210°C.

[0065] Optionally, the temperature of the cross-linking reaction is 170°C, 175°C, 180°C, 185°C, 190°C, 195°C, 200°C, 205°C or 210°C, or, the temperature of the cross-linking reaction may also be within the range between any two of the above temperatures.

[0066] In some embodiments, the cross-linking reaction time is 3 min to 10 min.

[0067] Optionally, the cross-linking reaction time is 3 min, 3.5 min, 4 min, 4.5 min, 5 min, 5.5 min, 6 min, 6.5 min, 7 min, 7.5 min, 8 min, 8.5 min, 9 min, 9.5 min or 10 min, or, the cross-linking reaction time may also be within the range between any two of the above times.

[0068] In some embodiments, the grinding temperature is -196°C to -70°C.

[0069] In the above-mentioned grinding temperature range, the anti-ant powder obtained by low-temperature grinding has a smaller particle size and better dispersibility. Optionally, the grinding temperature is -196°C, -190°C, -180°C, -160°C, -140°C, -120°C, -100°C, -90°C, -80°C or -70°C, or the grinding temperature can also be in the range between any two of the above temperatures.

[0070] It is understood that the above-mentioned grinding temperature can be achieved by loading the second mixed material into a grinding jar and then immersing the grinding jar in liquid nitrogen.

[0071] In some embodiments, the grinding jar is immersed in liquid nitrogen for 0.5 h to 3 h.

[0072] Optionally, the grinding jar is immersed in liquid nitrogen for 0.5 h, 1 h, 1.5 h, 2 h, 2.5 h or 3 h, or the grinding jar is immersed in liquid nitrogen for a period of time within the range between any two of the above periods.

[0073] In some embodiments, the grinding process has a frequency of 30 Hz to 70 Hz.

[0074] It is understood that the frequency of the grinding process refers to the frequency at which the grinding process equipment operates. Exemplarily, the grinding process equipment can be a cryogenic grinder. Optionally, the grinding process frequency is 30 Hz, 35 Hz, 40 Hz, 45 Hz, 50 Hz, 55 Hz, 60 Hz, 65 Hz or 70 Hz, or the grinding process frequency can also be within the range between any two of the above frequencies.

[0075] In some embodiments, after obtaining the first mixed material, before subjecting the mixed material to a cross-linking reaction, the following steps are further included:

[0076] The first mixed material is subjected to compression molding.

[0077] In some embodiments, the temperature of the press forming process is 80°C to 120°C.

[0078] Optionally, the temperature of the press molding process is 80°C, 85°C, 90°C, 95°C, 100°C, 105°C, 110°C, 115°C or 120°C, or, the temperature of the press molding process may be within the range between any two of the above temperatures.

[0079] In some embodiments, the compression molding process lasts for 3 min to 5 min.

[0080] Optionally, the time for the press molding treatment is 3 min, 3.2 min, 3.4 min, 3.6 min, 3.8 min, 4 min, 4.2 min, 4.4 min, 4.6 min, 4.8 min or 5 min, or, the time for the press molding treatment may also be within the range between any two of the above times.

[0081] In some embodiments, the second mixed material is ground and then further comprises the following steps:

[0082] The ground material is dried.

[0083] In some embodiments, the drying process is carried out by oven drying.

[0084] In some embodiments, the drying temperature is 50°C to 80°C.

[0085] Optionally, the drying temperature is 50°C, 55°C, 60°C, 65°C, 70°C, 75°C or 80°C, or, the drying temperature may also be within a range between any two of the above temperatures.

[0086] In some embodiments, the drying time is 6 h to 12 h.

[0087] Optionally, the drying time is 6 hours to 12 hours, or the drying time may be within the range between any two of the above times.

[0088] In some embodiments, the method for preparing the anti-ant powder comprises the following steps:

[0089] S1: Using a torque rheometer, 66% to 99.4% by mass of a resin matrix, 0.1% to 30% by mass of an anti-termite agent, and 0.5% to 4% by mass of a cross-linking agent are melt-blended at 80° C. to 120° C. for 6 min to 10 min, and the first mixed material is obtained after cooling.

[0090] S2: Pressing the first mixed material at 80° C. to 120° C. for 3 min to 5 min in a flat vulcanizing press to obtain a preformed sheet.

[0091] S3: The preformed sheet is subjected to a cross-linking reaction at 170° C. to 210° C. in a flat vulcanizer for 3 min to 10 min, and the preformed sheet is taken out and cut into pieces to obtain a second mixed material.

[0092] S4: The second mixed material is placed in a special zirconium oxide grinding jar, which is soaked in liquid nitrogen for 0.5 h to 3 h and then placed in a cryogenic grinder for cryogenic grinding at a frequency of 30 Hz to 70 Hz to obtain a powder.

[0093] S5: Dry the powder at 50°C to 80°C for 6h to 12h to obtain the ant-proof powder for low-temperature grinding.

[0094] Another embodiment of the present application provides a cable, including a core layer and a cortical layer. The cortical layer is disposed on the periphery of the core layer; the cortical layer includes the ant-proof powder of any one of the above, or the ant-proof powder prepared by the preparation method of any one of the above ant-proof powders.

[0095] The following are specific embodiments

[0096] Example 1

[0097] Preparation method of ant-proof powder:

[0098] (1) Using a torque rheometer, blend 1% by mass of dicumyl peroxide (DCP), 10% by mass ratio of imidacloprid and 89% of ethylene-vinyl acetate copolymer at 100°C for 6 min. After taking out and cooling, obtain imidacloprid@ethylene-vinyl acetate copolymer A.

[0099] (2) Press imidacloprid@ethylene-vinyl acetate copolymer A at 100°C for 3 min in a flat vulcanizer to obtain a preformed sheet B.

[0100] (3) Crosslink the preformed sheet B at 180°C for 3 min in a flat vulcanizer, and after taking out, obtain the crosslinked imidacloprid@ethylene-vinyl acetate copolymer C.

[0101] (4) Load the crosslinked imidacloprid@ethylene-vinyl acetate copolymer C into a special zirconia grinding jar. After the grinding jar is soaked in liquid nitrogen for 1 h, put it into a low-temperature grinder and grind it at a frequency of 70 Hz at low temperature to obtain imidacloprid@ethylene-vinyl acetate copolymer ant-proof powder D.

[0102] (5) Dry the imidacloprid@ethylene-vinyl acetate copolymer ant-proof powder D at 60°C for 6 h to obtain the finished ant-proof powder for low-temperature grinding.

[0103] Microscopic morphology: To evaluate the microscopic morphology of the imidacloprid@ethylene-vinyl acetate copolymer ant-proof powder, the ant-proof powder prepared in Example 1 was scanned using SEM, as Figure 1 shown. The results show that: the particle size of the prepared ant-proof powder is about 100 μm to 300 μm, the particles are rough, and the shape is irregular.

[0104] Qualitative characterization: To prove that the imidacloprid@ethylene-vinyl acetate copolymer ant-proof powder contains imidacloprid, the ant-proof powder prepared in Example 1 was scanned by EDS, as Figure 2 shown. The results show that: chlorine element is significantly enriched in the ant-proof powder, and chlorine element, as a characteristic element of imidacloprid, can prove that the insecticide has been successfully added to the ant-proof powder.

[0105] Thermal stability: To prove that the prepared ant-proof powder has excellent thermal stability, the thermogravimetric curves of imidacloprid, ethylene-vinyl acetate copolymer, and imidacloprid@ethylene-vinyl acetate copolymer in Example 1 were measured, and the experimental results are as Figure 3 shown. The results show that the ant-proof powder prepared in Example 1 has good heat resistance.

[0106] Example 2

[0107] Preparation method of ant-proof powder:

[0108] (1) Using a torque rheometer, 2% by mass of dicumyl peroxide (DCP), 20% by mass percentage of imidacloprid and 78% by mass percentage of ethylene-vinyl acetate copolymer were blended at 120 °C and 60 r / min for 6 min. After taking out and cooling, imidacloprid@ethylene-vinyl acetate copolymer A was obtained.

[0109] (2) Imidacloprid@ethylene-vinyl acetate copolymer A was pressed in a flat vulcanizer at 120 °C for 4 min to obtain a preformed sheet B.

[0110] (3) The preformed sheet B was crosslinked in a flat vulcanizer at 200 °C and 6 MPa for 4 min, and after taking out, the crosslinked imidacloprid@ethylene-vinyl acetate copolymer C was obtained.

[0111] (4) The crosslinked imidacloprid@ethylene-vinyl acetate copolymer C was loaded into a special zirconia grinding jar. The grinding jar was soaked in liquid nitrogen for 1 h and then placed in a cryogenic grinder, and cryogenic grinding was carried out at a frequency of 70 Hz to obtain imidacloprid@ethylene-vinyl acetate copolymer ant-proof powder D.

[0112] (5) The imidacloprid@ethylene-vinyl acetate copolymer ant-proof powder D was dried at 60 °C for 6 h to obtain the finished product of cryogenically ground ant-proof powder.

[0113] Effect of crosslinking agent content on grinding: To characterize the effect of the crosslinking agent content on the grinding of imidacloprid@ethylene-vinyl acetate copolymer, the hardness of the unground imidacloprid@ethylene-vinyl acetate copolymer was tested, as Figure 4 shown. The results show that as the crosslinking agent content increases, the hardness of the system gradually decreases, which has an adverse effect on grinding.

[0114] Example 3

[0115] Preparation method of ant-proof powder:

[0116] (1)Using a torque rheometer, 1% by mass of bis(tert-butylperoxy)diisopropylbenzene, 10% by mass ratio of imidacloprid and 89% by mass ratio of ethylene-vinyl acetate copolymer were blended at 100 °C and 40 r / min for 6 min. After taking out and cooling, imidacloprid@ethylene-vinyl acetate copolymer A was obtained.

[0117] (2)In a flat vulcanizer, imidacloprid@ethylene-vinyl acetate copolymer A was pressed at 100 °C and 6 MPa for 3 min to obtain a preformed sheet B.

[0118] (3)In a flat vulcanizer, the preformed sheet B was crosslinked at 180 °C for 3 min. After taking out, crosslinked imidacloprid@ethylene-vinyl acetate copolymer C was obtained.

[0119] (4)The crosslinked imidacloprid@ethylene-vinyl acetate copolymer C was put into a special zirconia grinding jar. The grinding jar was soaked in liquid nitrogen for 1 h and then placed in a cryogenic grinder, and cryogenically ground at a frequency of 40 Hz to obtain imidacloprid@ethylene-vinyl acetate copolymer ant-proof powder D.

[0120] (5)The imidacloprid@ethylene-vinyl acetate copolymer ant-proof powder D was dried at 60 °C for 6 h to obtain the cryogenically ground ant-proof powder finished product.

[0121] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of 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 falling within the scope described in this specification.

[0122] The above-described embodiments only represent several implementation manners of this application, and their descriptions are relatively specific and detailed. However, it should not be construed as a limitation to the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the protection scope of the patent of this application should be subject to the appended claims, and the description and drawings can be used to explain the content of the claims.

Claims

1. An anti-ant powder, characterized in that: The invention comprises the following components in parts by weight: 66 to 99.4 parts of a resin matrix, 0.1 to 30 parts of an anti-termite agent and 0.5 to 4 parts of a cross-linking agent; the resin matrix covers the anti-termite agent.

2. The anti-ant powder according to claim 1, characterized in that: The resin matrix includes at least one of ethylene-vinyl acetate copolymer, styrene-butadiene-styrene block copolymer, styrene-ethylene-butadiene block copolymer and polyolefin elastomer.

3. The anti-ant powder according to claim 1, characterized in that: The anti-termite agent includes at least one of imidacloprid, bifenthrin and avermectin.

4. The anti-ant powder according to claim 1, characterized in that: The cross-linking agent includes at least one of dicumyl peroxide and di-tert-butyl dicumyl peroxide.

5. The anti-ant powder according to any one of claims 1 to 4, characterized in that: The anti-termite powder comprises the following components in percentage by mass: 66% to 99.4% of the resin matrix, 0.1% to 30% of the anti-termite agent, and 0.5% to 4% of the cross-linking agent.

6. The anti-ant powder according to any one of claims 1 to 4, characterized in that: The particle size of the anti-ant powder is 30 μm to 300 μm.

7. A method for preparing anti-ant powder, characterized in that: The steps include: Melt-blending 66 to 99.4 parts by weight of a resin matrix, 0.1 to 30 parts by weight of an anti-termite agent, and 0.5 to 4 parts by weight of a cross-linking agent to obtain a first mixed material; allowing the mixed material to undergo a cross-linking reaction to obtain a second mixed material; Grinding the second mixed material; Wherein, the temperature of the melt blending is lower than the temperature of the cross-linking reaction.

8. The method for preparing the anti-ant powder according to claim 7, characterized in that: The temperature of the melt blending is 80°C to 120°C; and / or, The melt blending time is 6 min to 10 min; and / or, The temperature of the cross-linking reaction is 170°C to 210°C; and / or, The cross-linking reaction time is 3 min to 10 min; and / or, The grinding temperature is -196°C to -70°C; and / or, The frequency of the grinding process is 30 Hz to 70 Hz.

9. The method for preparing the anti-ant powder according to any one of claims 7 to 8, characterized in that: After obtaining the first mixed material, the following steps are further included before the mixed material is subjected to a cross-linking reaction: Performing a compression molding process on the first mixed material; and / or, After grinding the second mixed material, the method further comprises the following steps: The ground material is dried.

10. A cable, characterized in that: It comprises a core layer and a skin layer, wherein the skin layer is arranged on the periphery of the core layer; the skin layer comprises the anti-ant powder according to any one of claims 1 to 6, or the anti-ant powder prepared by the preparation method of the anti-ant powder according to any one of claims 7 to 9.

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