Composite antistatic agent and its application in antistatic PVC wire tube

Abstract

The application discloses a kind of composite antistatic agent and its application in antistatic PVC wire pipe, belong to modified polymer material technical field.The composite antistatic agent of the application is prepared by the following method: under the condition of 50-60 DEG C dry inert gas atmosphere, nanometer silicon dioxide and coupling agent are ground for 60-100 minutes, and nanometer composite material is prepared;ultra-branched type oxidized polyethylene is then added, and nanometer composite antistatic agent is obtained by twin-screw extruder extrusion granulation.The composite antistatic agent of the application is applied to high-performance antistatic PVC wire pipe product, not only excellent antistatic performance, antistatic effect is lasting, also has excellent mechanical property, ensures its safety and reliability in use process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of modified polymer materials, and more particularly to a composite antistatic agent and application thereof in antistatic PVC wire pipe. BACKGROUND

[0002] Polyvinyl chloride (PVC) wire pipe has the advantages of light weight, easy installation, corrosion resistance, good flame resistance, etc., and is widely used as a wire sheath pipe in the construction field. However, PVC is a good insulator, has a large surface resistance and poor conductivity, and is prone to static accumulation, which poses a safety hazard of fire caused by static accumulation. At the same time, PVC wire pipe is often subjected to impact or collision during transportation and installation, and thus needs to have good impact resistance and pressure resistance.

[0003] At present, the methods for antistatic treatment of PVC wire pipe mainly include reducing friction to lower the generation of static electricity, using a conductive device to eliminate static electricity during processing, increasing the humidity of the processing and use environment of plastic pipe products, using an antistatic agent, filling with a conductive substance, and radiation modification, etc. Among them, using an antistatic agent during processing is one of the effective means to solve the problem of static electricity of PVC pipe products, and domestic and foreign researchers have been committed to the research and development of different types of antistatic agent products. In order to achieve the purpose of antistatic of plastic pipe products, the surface resistance should be less than 10 10 Ω in general environment, the surface resistance should be between 10 8 ~ 10 9 Ω in occasions with higher requirements for antistatic, and the surface resistance of pipe for mine transportation should be less than 10 8 Ω. Generally, the use method of PVC pipe antistatic agent is divided into coating method and internal addition method. Internal antistatic agent is a kind of surfactant, which is added to the resin and processed together with plastic. The antistatic agent molecules move to the surface by means of the chain segment movement of the polymer, and absorb the moisture in the air to form a uniform conductive layer. However, the currently added antistatic agent has the problems of poor compatibility with PVC material system, easy precipitation, resulting in reduced mechanical properties of PVC wire pipe, poor antistatic performance, insufficient antistatic durability, etc.

[0004] The prior art discloses a high-strength flame-retardant cable material composed of the following raw materials by weight: soft polyvinyl chloride 80-100 parts, cobalt hydroxyl stannate 5-15 parts, nano filler 5-12 parts, dispersing agent 0.5-5 parts, coupling agent 1-5 parts, organic tin stabilizer 3-5 parts, dioctyl phthalate 30-40 parts, antistatic agent 0.1-0.5 parts, lubricant 2-6 parts, and metal acetate 1-5 parts. Although the use of dioctyl phthalate as a plasticizer and the use of nano filler improve the mechanical properties of the cable material, the problems of poor antistatic performance of PVC wire pipe and insufficient antistatic durability are not solved. SUMMARY

[0005] The present application aims at the defects and deficiencies in the prior art that PVC wire pipe cannot simultaneously solve the problems of reduced mechanical properties, poor antistatic performance and insufficient antistatic durability, and provides a composite antistatic agent, which uses a coupling agent to treat nano-silicon dioxide and then adds hyperbranched oxidized polyethylene containing hydrophilic groups, and has excellent antistatic performance, long-lasting antistatic effect and excellent mechanical properties when applied in PVC materials.

[0006] Another object of the present application is to provide an application of the composite antistatic agent in the preparation of an antistatic PVC wire pipe.

[0007] Still another object of the present application is to provide an antistatic PVC wire pipe.

[0008] Yet another object of the present application is to provide a preparation method of the antistatic PVC wire pipe.

[0009] The above objects of the present application are achieved by the following technical solutions.

[0010] A composite antistatic agent is prepared by the following method:

[0011] Nano-silicon dioxide and a coupling agent are ground for 60-100 minutes under the condition of a dry inert gas atmosphere at 50-60 DEG C to prepare a nano-composite material; hyperbranched oxidized polyethylene is then added, and the mixture is extruded and granulated by a double-screw extruder to obtain a nano-composite antistatic agent.

[0012] The mass ratio of nano-silicon dioxide, coupling agent and hyperbranched oxidized polyethylene is 1:(2-5):(5-10).

[0013] It should be noted that:

[0014] The nano-silicon dioxide in the composite antistatic agent has small particle size, large specific surface area and strong surface activity, and its structural formula can be represented as mSiO2-nH2O. The hydrophilic groups absorb water in the air to form a conductive channel, thereby avoiding the accumulation of static electricity and achieving the antistatic effect. However, the nano-silicon dioxide has poor compatibility with the PVC material system, and is prone to agglomeration and poor dispersion when directly added. After modification by the coupling agent, the dispersion performance and antistatic performance of the nano-silicon dioxide can be greatly improved. At the same time, uniform dispersion of the nano-silicon dioxide can also improve the mechanical properties of the PVC wire pipe product. The dispersion effects of the nano-silicon dioxide in the PVC wire pipe before and after modification by the coupling agent are shown in the accompanying drawings. Figure 1

[0015] ​The hyperbranched type oxidized polyethylene belongs to a hyperbranched polymer, has a unique branched molecular structure, and contains a large number of terminal functional groups. The structure endows the hyperbranched type oxidized polyethylene with special properties such as low viscosity of 100-200 m2 at 22.22140 ℃, high reactivity, and the like. The hyperbranched type oxidized polyethylene contains long-chain alkyl groups in the molecular chain, can be entangled with the molecular chain of PVC, and has good compatibility with the PVC material system; meanwhile, the inside and the end of the chain segment contain hydrophilic groups (ester groups, hydroxyl groups, ketone groups, and the like), and the hydrophilicity is greatly enhanced. The hyperbranched type oxidized polyethylene is added to a PVC wire pipe product, relies on the super strong hydrophilic ability, can absorb water in the air to form a conductive channel, prevents the accumulation of static electricity, and has a remarkable antistatic effect. The oxidized polyethylene chain segment has a promoting effect on the plasticization of PVC resin, improves the plasticization degree and plasticization uniformity of the PVC material system, and further improves the mechanical properties of the PVC pipe product.

[0016] The coupling agent is used to treat nano-silicon dioxide in the composite antistatic agent, can form a better network conductive channel of nano-silicon dioxide in PVC on the one hand, and can effectively reduce the interface effect between nano-silicon dioxide and PVC on the other hand, and improve the dispersibility of nano-silicon dioxide in PVC; the hyperbranched type oxidized polyethylene is further connected, the hydrophilic groups contained in the hyperbranched type oxidized polyethylene improve the antistatic effect, and the oxidized polyethylene can further promote the plasticization of PVC resin, and further improve the mechanical properties of the pipe material. At the same time, the nano-silicon dioxide particles also have a toughening effect on the product, and the three substances synergistically act, so that the antistatic effect and the product performance are improved.

[0017] The application develops a new type of nano-composite antistatic agent, which is added to a PVC wire pipe material formula system, can improve the antistatic performance of the PVC wire pipe product, can increase the impact resistance and the compression resistance, and provides a high-performance anti-static PVC wire pipe product for the building field.

[0018] The use amount of the coupling agent and the hyperbranched type oxidized polyethylene is also crucial. The coupling agent can improve the interface performance between the high polymer material and the filler. Two groups with different properties exist in the molecular structure of the coupling agent. One group can react with the high polymer material or has good compatibility, and the other group can form a chemical bond with the inorganic filler. When the concentration of the coupling agent is low, the dispersing effect on the silicon dioxide is not obvious. When the concentration is too high, the coupling agent on the surface of the silicon dioxide is arranged in disorder, and the physical adsorption layer is thickened accordingly, which is not conducive to the interface bonding. When the use amount of the hyperbranched type oxidized polyethylene is small, the antistatic effect and the plasticization effect on PVC are not obvious. When the use amount is large, the plasticization time of the PVC material system is advanced, the melt is excessively plasticized, and the mechanical properties of the product are reduced.

[0019] In the specific embodiment, the mass ratio of nanosilica: coupling agent: hyperbranched type oxidized polyethylene can be 1:2:5 or 1:5:10 or 1:2:6 or 1:3:7 or 1:4:8.

[0020] Preferably, the particle size of the nanosilica is 10-100 nm.

[0021] In the specific embodiment, the grinding can be performed by using a ball mill at a temperature of 50-60℃; and the extrusion granulation can be performed by using a double screw extruder at a screw rotation speed of 80 r / min and an extrusion temperature of 180℃.

[0022] Preferably, the structure of the hyperbranched type oxidized polyethylene is as follows:

[0023]

[0024] In the specific embodiment, the hyperbranched type oxidized polyethylene is prepared by using the following method:

[0025] The oxygen-containing groups in the molecular chain can effectively prevent the generation of static electricity by absorbing water in the air, and at the same time, the oxidized polyethylene branches can be entangled with the PVC molecular chain to promote the plasticization of the PVC resin, improve the plasticization degree and uniformity of the material system, and further improve the comprehensive performance of the product.

[0026] Preferably, the hyperbranched type oxidized polyethylene is prepared by using the following method:

[0027] The oxidized polyethylene, trimethylolpropane trimethacrylate, initiator and antioxidant are uniformly mixed and then extruded to obtain the hyperbranched type oxidized polyethylene.

[0028] The extrusion temperature can refer to the conventional temperature, for example, 170℃, and the extrusion at 170℃ can ensure that the components are melted and uniformly mixed.

[0029] Preferably, the acid value of the oxidized polyethylene is 10-20 mg (KOH) / g, and the number average molecular weight is 1000-3000.

[0030] The acid value characterizes the number of oxygen-containing functional groups in the molecular chain of the oxidized polyethylene, and the high or low value directly affects the antistatic effect and the plasticizing performance on PVC. The molecular weight of the oxidized polyethylene affects its processing performance. If the molecular weight is too small, the melting point is low, and the volatile is easily precipitated during the processing; if the molecular weight is too large, the processing performance is poor.

[0031] In the specific embodiment, the raw materials for preparing the hyperbranched type oxidized polyethylene are as follows:

[0032] The structure of trimethylolpropane trimethacrylate is as follows:

[0033]

[0034] The initiator can be one of dibenzoyl peroxide (BPO), azobisisobutyronitrile (AIBN), and the antioxidant can be one of BHT, 1010, and 168

[0035] In a further specific embodiment, the coupling agent of the present application can be a silane coupling agent or an aluminate coupling agent.

[0036] The present application also specifically protects the use of the composite antistatic agent in the preparation of an antistatic PVC wire pipe.

[0037] The present application also specifically protects an antistatic PVC wire pipe, which comprises the following components in parts by weight:

[0038] Polyvinyl chloride 80-100 parts, calcium carbonate 5-20 parts, calcium-zinc heat stabilizer 1-10 parts, composite antistatic agent 1-5 parts, lubricating system 1-5 parts, processing aid 0.5-2 parts, impact modifier 5-10 parts, titanium dioxide 1-5 parts,

[0039] The antistatic agent is the composite antistatic agent.

[0040] The calcium carbonate is a filler component, and the titanium dioxide is a weathering agent component.

[0041] Preferably, it comprises the following components in parts by weight:

[0042] Polyvinyl chloride 80-100 parts, calcium carbonate 10-15 parts, calcium-zinc heat stabilizer 3-7 parts, composite antistatic agent 3-4 parts, lubricating system 2-3 parts, processing aid 0.5-1 parts, impact modifier 7-10 parts, titanium dioxide 2-3 parts.

[0043] Preferably, the lubricating system is composed of an internal lubricant and an external lubricant, wherein the internal lubricant is one of monoglyceride and oxidized polyethylene wax, and the external lubricant is PE wax.

[0044] Preferably, the processing aid is one of LPA-40 or LP90.

[0045] Preferably, the impact modifier is one of CPE and MBS.

[0046] The present application also specifically protects a preparation method of an antistatic PVC wire pipe, comprising the following steps:

[0047] S1: uniformly hot-mixing the components, cold-mixing when the mixing temperature reaches 120-130℃, and ready for use when the temperature is 60-65℃;

[0048] S2: melt plasticizing and extruding the mixture, molding by a die, cooling and setting, and cutting to obtain the anti-static PVC wire tube.

[0049] Compared with the prior art, the application has the following advantages:

[0050] The coupling agent is used to treat the nano-silica in the composite antistatic agent, which can form a better network conductive channel for the nano-silica in the PVC, effectively reduce the interface effect between the nano-silica and the PVC, and improve the dispersibility of the nano-silica in the PVC; the hyperbranched oxidized polyethylene is further added, the hydrophilic groups contained in the oxidized polyethylene can improve the antistatic effect, and the oxidized polyethylene can also promote the plasticization of the PVC resin, thereby improving the mechanical properties of the pipe.

[0051] The high-performance antistatic PVC wire tube product has excellent antistatic performance, long-lasting antistatic effect, and excellent mechanical properties, which ensures the safety and reliability of the product in use. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 SEM image of the dispersion effect of the nano-silica before modification by the coupling agent in the PVC wire tube.

[0053] Figure 2 SEM image of the dispersion effect of the nano-silica after modification by the coupling agent in the PVC wire tube. DETAILED DESCRIPTION

[0054] The application will be further described below in combination with the specific embodiments, but the embodiments do not limit the application in any form. Unless otherwise specified, the raw materials and reagents used in the embodiments of the application are commercially available.

[0055] 1. Raw materials and reagents

[0056] The raw material information of the embodiments and comparative examples of the application is specifically described as follows:

[0057] Polyvinyl chloride resin (PVC), manufacturer: Zhongtai Chemical;

[0058] Calcium carbonate, grade: PCC-P, manufacturer: Guilin Jinshan;

[0059] Calcium-zinc heat stabilizer, grade: 161FP, manufacturer: Germany Xiong;

[0060] Lubricant monoglyceride, grade: DM95, manufacturer: Hangzhou Oil;

[0061] Lubricant PE wax, grade: LAW95, manufacturer: Lu'an, Shanxi;

[0062] Processing aid, brand LPA-40, manufacturer Shandong Ruifeng;

[0063] Impact modifier CPE, brand CPE135A, manufacturer Shandong Rikao;

[0064] Titanium dioxide, brand NR950, manufacturer Xuzhou Titanium Dioxide Chemical;

[0065] Nano-silica, particle size 10-100nm Nm, brand HDK N20, Wacker Chemical;

[0066] Oxidized polyethylene, brand RL9308, acid value of oxidized polyethylene 17.3mg(KOH) / g, number average molecular weight 2343, manufacturer Ruile New Material;

[0067] Trimethylolpropane trimethacrylate (TMPTMA), manufacturer Sigma-Aldrich;

[0068] Coupling agent is silane coupling agent, initiator is BPO, antioxidant is 1010, commercially available,

[0069] The lubricating system is compounded by monoglyceride and PE wax in a mass ratio of 1:2, and the same kind is used in other parallel experiments.

[0070] 2. Performance test

[0071] (1) The PVC wire tube products prepared in each example and comparative example were tested for tensile strength and elongation at break according to GB / T 8804.3-2003, and tested for compression resistance and impact performance according to IEC 61386-2017.

[0072] (2) The PVC wire tube products prepared in each example and comparative example were tested for surface resistance according to MT 914-2008, and the inner and outer surfaces were each tested three times, and then the arithmetic mean value was taken.

[0073] Example 1

[0074] A composite antistatic agent was prepared by the following method:

[0075] The composite antistatic agent was prepared by chemical reaction of nano-silica, coupling agent and hyperbranched oxidized polyethylene, and the specific preparation process was as follows: nano-silica and coupling agent were added to a ball mill and ground for 80 minutes in a dry nitrogen atmosphere to prepare a nano-composite material; then hyperbranched oxidized polyethylene was added and extruded and granulated by a twin-screw extruder, with a screw speed of 80r / min and an extrusion temperature of 180℃, to obtain the composite antistatic agent,

[0076] The mass ratio of nano-silica, coupling agent and hyperbranched oxidized polyethylene was 1:2:5,

[0077] The structure of the hyperbranched type oxidized polyethylene is as follows:

[0078]

[0079] The polyethylene branch has oxidized groups of hydroxyl, ketone and ester groups,

[0080] The hyperbranched type oxidized polyethylene is prepared by the following method:

[0081] The oxidized polyethylene, trimethylolpropane trimethacrylate, initiator and antioxidant are uniformly mixed, extruded and granulated to obtain the hyperbranched type oxidized polyethylene, and the extrusion temperature is 170°C.

[0082] Example 2

[0083] A composite antistatic agent is prepared by the following method:

[0084] The composite antistatic agent is prepared by chemical reaction of nano-silicon dioxide, coupling agent and hyperbranched type oxidized polyethylene, and the specific preparation process is as follows: the nano-silicon dioxide and coupling agent are added to a ball mill and ground for 80 minutes in a dry nitrogen atmosphere to obtain a nanocomposite; then the hyperbranched type oxidized polyethylene is added and extruded and granulated by a twin-screw extruder, the screw speed is 80 r / min, and the extrusion temperature is 180°C, to obtain the composite antistatic agent,

[0085] The mass ratio of nano-silicon dioxide, coupling agent and hyperbranched type oxidized polyethylene is 1:5:10,

[0086] The components are the same as in Example 1.

[0087] Example 3

[0088] A composite antistatic agent is prepared by the following method:

[0089] The composite antistatic agent is prepared by chemical reaction of nano-silicon dioxide, coupling agent and hyperbranched type oxidized polyethylene, and the specific preparation process is as follows: the nano-silicon dioxide and coupling agent are added to a ball mill and ground for 80 minutes in a dry nitrogen atmosphere to obtain a nanocomposite; then the hyperbranched type oxidized polyethylene is added and extruded and granulated by a twin-screw extruder, the screw speed is 80 r / min, and the extrusion temperature is 180°C, to obtain the composite antistatic agent,

[0090] The mass ratio of nano-silicon dioxide, coupling agent and hyperbranched type oxidized polyethylene is 1:2:6,

[0091] The components are the same as in Example 1.

[0092] Example 4

[0093] A composite antistatic agent is prepared by the following method:

[0094] The composite antistatic agent is prepared by chemical reaction of nano-silica, coupling agent and hyperbranched polyethylene oxide, and the specific preparation process is as follows: nano-silica and coupling agent are added to a ball mill and ground for 80 minutes in a dry nitrogen atmosphere to obtain a nanocomposite; then hyperbranched polyethylene oxide is added and extruded and granulated by a twin-screw extruder, with a screw speed of 80 r / min and an extrusion temperature of 180℃, to obtain the composite antistatic agent,

[0095] The mass ratio of nano-silica, coupling agent and hyperbranched polyethylene oxide is 1:3:7,

[0096] The components are the same as in Example 1.

[0097] Example 5

[0098] A composite antistatic agent is prepared by the following method:

[0099] The composite antistatic agent is prepared by chemical reaction of nano-silica, coupling agent and hyperbranched polyethylene oxide, and the specific preparation process is as follows: nano-silica and coupling agent are added to a ball mill and ground for 80 minutes in a dry nitrogen atmosphere to obtain a nanocomposite; then hyperbranched polyethylene oxide is added and extruded and granulated by a twin-screw extruder, with a screw speed of 80 r / min and an extrusion temperature of 180℃, to obtain the composite antistatic agent,

[0100] The mass ratio of nano-silica, coupling agent and hyperbranched polyethylene oxide is 1:4:8,

[0101] The components are the same as in Example 1.

[0102] Examples 1-7

[0103] An antistatic PVC wire tube, in terms of weight parts, comprises the components shown in Table 1 below:

[0104]

[0105]

[0106] The preparation method of the antistatic PVC wire tube of the above Examples 1-7 can be specifically referred to as follows:

[0107] S1: uniformly heat-mix the components, and when the mixing temperature reaches 130℃, cold-mix the components, and when the temperature is 60-65℃, prepare for use;

[0108] S2: melt and plasticize the above mixture and extrude, mold, cool and shape, and cut to obtain the antistatic PVC wire tube,

[0109] The temperature of each zone of the conical twin-screw extruder is 175℃, 160℃, 160℃, 160℃, 155℃, 155℃, the temperature of each zone of the die is 170℃, 165℃, 165℃, 205℃, and the temperature of the setting cooling water is 25℃.

[0110] Comparative Examples 1-5

[0111] An anti-static PVC wire tube, including the components shown in Table 2 in weight parts, is provided.

[0112] Table 2

[0113]

[0114]

[0115] The preparation method of the anti-static PVC wire tube of the above-mentioned Comparative Examples 1-5 can be specifically referred to as follows:

[0116] S1: uniformly heat-mix the components, and when the mixing temperature reaches 120-130℃, cold-mix the components, and when the temperature is 60-65℃, prepare for use;

[0117] S2: melt and plasticize the above-mentioned mixture and extrude, mold, cool and set, and cut to obtain the anti-static PVC wire tube,

[0118] The temperature of each zone of the conical twin-screw extruder is 175℃, 160℃, 160℃, 160℃, 155℃, 155℃, the temperature of each zone of the die is 170℃, 165℃, 165℃, 205℃, and the temperature of the setting cooling water is 25℃.

[0119] Result detection

[0120] The performance of the high-performance anti-static PVC wire tube in each example and comparative example is tested, and the results are shown in Table 3.

[0121] Table 3

[0122]

[0123]

[0124] The coupling agent modification in the composite antistatic agent of the application can significantly improve the dispersion effect of nano-silica in the PVC wire tube, wherein Figure 1 The SEM diagram of the dispersion effect of nano-silica in the PVC wire tube before coupling agent modification can be seen, and it can be seen that the silica in the PVC wire tube before coupling agent modification is easy to agglomerate. Figure 2The SEM diagram of the dispersion effect of the coupling agent modified nano-silica in the PVC wire tube shows that the coupling agent modified nano-silica is uniformly dispersed in the PVC wire tube.

[0125] As can be seen from the test results in Table 3, the key performance indicators of the high-performance anti-static PVC wire tube prepared by the application are all better than the standard requirements. Compared with the comparative examples, the tensile strength and elongation at break of the examples are greatly improved; under the same load (1250N) and the same load time (1min), the deformation amount (Df) of the pipe material is greatly reduced, which reflects a more excellent compression resistance; the impact performance is significantly improved, which reflects a better impact resistance. The surface resistance of the PVC wire tube product prepared in the examples is lower, and the surface resistance change rate after storage for 30d is small, which reflects excellent anti-static performance and anti-static durability, indicating that the nano-composite anti-static agent has a significant anti-static effect.

[0126] Obviously, the above examples of the application are only examples for clearly illustrating the application, and are not intended to limit the embodiments of the application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the claims of the application.

Claims

1. A composite antistatic agent, characterized in that, Prepared by the following method: Grind nano-silica and coupling agent in a dry inert gas atmosphere at 50-60°C for 60-100 minutes to obtain a nano-composite material; then add hyperbranched polyethylene oxide and extrude and granulate through a twin-screw extruder to obtain a nano-composite antistatic agent. The mass ratio of nano-silica: coupling agent: hyperbranched polyethylene oxide is 1: (2-5): (5-10); The hyperbranched polyethylene oxide is prepared by the following method: The oxidized polyethylene, trimethylolpropane trimethacrylate, initiator and antioxidant are uniformly mixed, and then extruded and granulated to obtain hyperbranched oxidized polyethylene; The acid value of the oxidized polyethylene is 10-20 mg (KOH) / g.

2. The composite antistatic agent according to claim 1, wherein The particle size of the nano-silicon dioxide is 10-100 nm.

3. The composite antistatic agent according to claim 1, wherein The number average molecular weight of the oxidized polyethylene is 1000-3000.

4. The composite antistatic agent according to claim 1, characterized in that The coupling agent is a silane coupling agent or an aluminate coupling agent.

5. Use of the composite antistatic agent according to any one of claims 1 to 4 in the preparation of antistatic PVC electric wire pipes. 6.An anti-static PVC wire tube, characterized in that: Calculated in parts by weight, it includes the following components: 80-100 parts of polyvinyl chloride, 5-20 parts of calcium carbonate, 1-10 parts of calcium zinc heat stabilizer, 1-5 parts of composite antistatic agent, 1-5 parts of lubricating system, 0.5-2 parts of processing aid, 5-10 parts of impact modifier, 1-5 parts of titanium dioxide, Wherein, the antistatic agent is the composite antistatic agent according to any one of claims 1 to 4.

7. The antistatic PVC electrical conduit according to claim 6, characterized in that: Calculated in parts by weight, it includes the following components: 80-100 parts of polyvinyl chloride, 10-15 parts of calcium carbonate, 3-7 parts of calcium zinc heat stabilizer, 3-4 parts of composite antistatic agent, 2-3 parts of lubricating system, 0.5-1 parts of processing aid, 7-10 parts of impact modifier, 2-3 parts of titanium dioxide.

8. A method for preparing the antistatic PVC electric wire tube according to claim 6 or 7, characterized in that: The steps include: S1: Mix all components evenly in hot mix, and when the mixture temperature reaches 120~130℃, mix them in cold mix, and heat to 60±5℃ for later use; S2: The mixture is melted, plasticized and extruded, molded, cooled and shaped, and cut to obtain an anti-static PVC wire tube.

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