Anti-static PP composite material and preparation method thereof

Abstract

The invention relates to an anti-static PP composite material and a preparation method thereof, and belongs to the technical field of high polymer materials. The antistatic PP composite material is prepared from the following components in parts by weight: 60 to 80 parts of PP resin, 10 to 20 parts of glass fiber, 0.1 to 0.5 part of a lubricant, 0.3 to 2 parts of a modified antistatic agent, 0.5 to 1.5 parts of a modified flame retardant and 0.2 to 0.8 part of an antioxidant, in the modified antistatic agent, an alkanolamide bond intermediate forms a conductive film, so that the resistivity is reduced, static dissipation is promoted, the material is endowed with lubricity, and the generation of static electricity is reduced; in addition, maleic anhydride forms a conductive layer and cooperates with quaternary ammonium salt to enhance hydrophilicity and accelerate charge transfer; a piperazine pyrophosphate derivative in the modified flame retardant and a phosphorus-nitrogen flame retardant cooperate to construct an expanded carbon layer to isolate a fire source and oxygen, so that the service life is prolonged; the anti-static PP composite material prepared by the invention not only has a good anti-static effect, but also has excellent flame-retardant and tensile properties.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, and in particular to an antistatic PP composite material and a preparation method thereof. Background Art

[0002] PP material (polypropylene) is a semi-crystalline thermoplastic. Due to its excellent mechanical properties, chemical corrosion resistance and thermal stability, it shows broad application prospects in many fields such as food packaging, medical devices and household products.

[0003] However, with the improvement of modern living standards, the environmental protection and safety issues of plastics have received increasing attention. Traditional PP materials are prone to accumulate static electricity during use and are difficult to eliminate. This will not only cause the plastic to absorb dust in the air, affecting its appearance, but will also cause adhesion problems during the plastic manufacturing process. In addition, the accumulation of static electricity may not only cause electric shocks and equipment failures, but may also cause safety hazards such as fires. Therefore, the anti-static problem of plastics has become crucial. In addition, PP materials are derived from petrochemical materials, composed of hydrocarbon elements, are flammable, and can easily be ignited to cause fires. These problems have limited the wider and deeper application of PP materials. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an antistatic PP composite material and a preparation method thereof.

[0005] The purpose of the present invention can be achieved through the following technical solutions: An antistatic PP composite material comprises the following raw materials in parts by weight: 60-80 parts of PP resin, 10-20 parts of glass fiber, 0.1-0.5 parts of lubricant, 0.3-2 parts of modified antistatic agent, 0.5-1.5 parts of modified flame retardant, and 0.2-0.8 parts of antioxidant; The lubricant is ethylene bis stearamide; The antioxidant is antioxidant 1098.

[0006] The modified antistatic agent is prepared by the following method: Step A1: lauric acid, diethanolamine and sodium methoxide were mixed evenly, the reactor system was replaced with nitrogen for 1 min, stirred for 5 min, slowly heated to 170-180° C., reacted for 3 h, filtered, washed and dried to obtain intermediate 1; Further, the usage ratio of lauric acid, diethanolamine and sodium methoxide is 0.9-1.1 mol: 1.0-1.4 mol: 0.06-0.12 g; Step A2: 6-chloro-1-hexene, intermediate 1 and methanol were mixed, stirred at 80° C., reacted for 12 h, cooled to room temperature, and dried under nitrogen protection to obtain intermediate 2; Further, the usage ratio of 6-chloro-1-hexene, intermediate 1, and methanol is 2-4 mol: 1-2 mol: 2 mL; Step A3: maleic anhydride and isoamyl acetate are mixed and reacted for 3 hours. Under nitrogen protection, azobisisobutyronitrile, toluene and intermediate 2 are added and stirred evenly. The mixture is reacted at 70° C. for 6 hours, centrifuged, washed, and vacuum dried at 45° C. to obtain a modified antistatic agent.

[0007] Furthermore, the usage ratio of maleic anhydride, isoamyl acetate, azobisisobutyronitrile, toluene and intermediate 2 is 0.2-0.4 mol: 1.16-2.13 g: 0.21-0.36 g: 90 mL: 1.06-3.12 g.

[0008] The modified flame retardant is prepared by the following method: Step B1: Add phenylphosphonic acid and anhydrous piperazine to a three-necked flask equipped with a thermometer, a water separator and a reflux condenser, heat to 110°C for reaction for 1 hour, continue to heat to 150°C for reaction for 8 hours, evacuate for 0.5 hour, cool, add acetone, wash, filter and vacuum dry to obtain a piperazine derivative; Further, the dosage ratio of phenylphosphonic acid, anhydrous piperazine, and acetone is 7.7-11.4 g: 8.6-10.2 g: 40-65 mL; Step B2: Under a nitrogen environment, piperazine derivatives, methylvinyldichlorosilane, pyridine and acetonitrile are uniformly mixed, stirred and dispersed, heated to 85° C., reacted for 10 hours, and after the reaction, vacuum distilled, washed and dried to obtain a pre-product; Further, the usage ratio of piperazine derivative, methylvinyldichlorosilane, pyridine and acetonitrile is 10-15 g: 5 g: 10-13 g: 200 mL; Step B3: 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, N,N-dimethylformamide and the pre-product are mixed, stirred at 150° C. for 9 hours, filtered, washed, and vacuum dried at 60° C. for 24 hours to obtain a modified flame retardant; Furthermore, the usage ratio of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, N,N-dimethylformamide and pre-product is 0.15-0.25 mol:40-60 mL:0.03-0.05 mol.

[0009] A method for preparing an antistatic PP composite material specifically comprises the following steps: S1: Weigh the raw materials according to weight, mix and stir the PP resin and the glass fiber to prepare a premixed material; S2: adding lubricant, modified antistatic agent, modified flame retardant and antioxidant to the premixed material and mixing them evenly, stirring them in a high-speed mixer for 5-10 minutes to obtain a mixed base material; S3: The mixed base material is placed in a twin-screw extruder at 200°C-240°C for extrusion granulation, the screw speed is controlled at 450-500r / min, and injection molding is performed by an injection molding machine to obtain an antistatic PP composite material.

[0010] Beneficial effects of the present invention: The modified antistatic agent prepared by the present invention has the advantage of a macromolecular polymer and exhibits antistatic performance that exceeds that of a traditional small molecule antistatic agent. The modified antistatic agent, under the action of a catalyst sodium methoxide, utilizes the amino group of diethanolamine and the carboxyl group of lauric acid to generate an intermediate 1 containing an alkanolamide bond; then utilizes the chlorine atom of 6-chloro-1-hexene to quaternize the intermediate to form an intermediate 2 with a positive charge; secondly, maleic anhydride and isoamyl acetate are mixed, and an initiator azobisisobutyronitrile is used to copolymerize the carbon-carbon double bond of 6-chloro-1-hexene and maleic anhydride to synthesize the modified antistatic agent. In the modified antistatic agent, the intermediate containing alkanolamide bonds forms a conductive continuous film on the surface of the material, effectively reducing the resistivity of the material and accelerating the dissipation of static charge, so as to achieve the purpose of antistatic and give the material lubricity, reduce the friction coefficient and reduce the generation of static electricity; in addition, the anhydride group of maleic anhydride reacts with the active group on the surface of the material at high temperature to form a conductive layer, which significantly improves the conductivity of the material surface, releases the charge quickly and effectively reduces the accumulation of static electricity. At the same time, maleic anhydride and quaternary ammonium salt work synergistically to enhance the hydrophilicity of the material surface and promote moisture absorption. After moisture absorption, the ions in the water film act as a conductive medium to accelerate the transfer and dissipation of charge, thereby effectively avoiding the negative impact of static electricity on production and product quality. In addition, maleic anhydride reduces the combustion temperature and smoke generation through heat absorption and catalysis during combustion, effectively slows down the combustion speed and further inhibits the progress of combustion.

[0011] The modified flame retardant prepared by the invention firstly utilizes piperazine and benzenephosphonic acid to undergo acylation reaction to obtain a piperazine derivative; secondly, utilizes the hydroxyl group of the intermediate and the chlorine atom of methylvinyldichlorosilane to undergo esterification reaction to generate a pre-product containing a carbon-carbon double bond; finally, utilizes the carbon-carbon double bond of methylvinyldichlorosilane to access the flame retardant 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to synthesize the modified flame retardant. The derivative of piperazine pyrophosphate contained in the modified flame retardant can effectively play the role of carbon source in polypropylene, and can be compounded with the phosphorus-nitrogen flame retardant to effectively block oxygen and fire source by constructing an expanded carbon layer, thereby producing a synergistic flame retardant effect; during combustion, the nitrogen element is converted into an inert gas, which effectively dilutes oxygen and combustible gas and reduces the combustion intensity; wherein the phosphorus-nitrogen flame retardant 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, as a phosphaphenanthrene compound with high thermal stability, can effectively retard in the condensed phase and the gas phase, promote the formation of a dense and continuous carbon layer during combustion, isolate oxygen, and block the exchange of heat and combustible gas, thereby enhancing the flame retardant effect and further extending its service life; in addition, the modified flame retardant prepared by the present invention is halogen-free, helps to reduce pollution to the environment and damage to the ecosystem, is harmless to human health, and achieves sustainable development.

[0012] The invented antistatic PP composite material not only has a good antistatic effect, but also has excellent flame retardant properties. It can effectively inhibit the combustion process, extend the service life of the material, reduce the possibility of fire, and effectively protect human health. Among them, glass fiber can strengthen the molecular structure of plastic, thereby improving the tensile strength of plastic, so that plastic with added glass fiber can withstand greater loads and pressure. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0014] A method for preparing an antistatic PP composite material specifically comprises the following steps: S1: Weigh the raw materials by weight, including 60 parts of PP resin, 10 parts of glass fiber, 0.1 parts of lubricant, 0.3 parts of modified antistatic agent (prepared in this example), 0.5 parts of modified flame retardant (prepared in this example), and 0.2 parts of antioxidant, mix the PP resin and the glass fiber to prepare a premixed material; S2: Add ethylene bisstearic acid amide, modified antistatic agent, modified flame retardant and antioxidant 1098 to the premixed material and mix them evenly, and stir them in a high-speed mixer for 5 minutes to obtain a mixed base material; S3: placing the mixed base material in a twin-screw extruder at 200°C for extrusion and granulation, with the screw speed controlled at 450r / min, and injection molding by an injection molding machine to obtain an antistatic PP composite material; The modified antistatic agent is prepared by the following method: Step A1: 0.9 mol of lauric acid, 1.0 mol of diethanolamine and 0.06 g of sodium methoxide were mixed evenly, the reactor system was replaced with nitrogen for 1 min, stirred for 5 min, slowly heated to 170° C., reacted for 3 h, filtered, washed and dried to obtain intermediate 1; Step A2: 2 mol of 6-chloro-1-hexene, 1 mol of intermediate 1, and 2 mL of methanol were mixed, stirred at 80° C., reacted for 12 h, cooled to room temperature, and dried under nitrogen protection to obtain intermediate 2; Step A3: 0.2 mol of maleic anhydride and 1.16 g of isoamyl acetate were mixed and reacted for 3 h. Under nitrogen protection, 0.21 g of azobisisobutyronitrile, 90 mL of toluene and 1.06 g of intermediate 2 were added and stirred evenly. The mixture was reacted at 70° C. for 6 h, centrifuged, washed, and dried in vacuo at 45° C. to obtain a modified antistatic agent. The modified flame retardant is prepared by the following method: Step B1: Add 7.7 g of phenylphosphonic acid and 8.6 g of anhydrous piperazine to a three-necked flask equipped with a thermometer, a water separator and a reflux condenser, and heat to 110°C for reaction for 1 h. Continue to heat to 150°C for reaction for 8 h, evacuate for 0.5 h, cool, add 40 mL of acetone, wash, filter, and vacuum dry to obtain a piperazine derivative; Step B2: Under a nitrogen environment, 10 g of a piperazine derivative, 5 g of methylvinyldichlorosilane, 10 g of pyridine and 200 mL of acetonitrile were mixed evenly, stirred and dispersed, heated to 85° C., reacted for 10 h, and after the reaction was completed, vacuum distilled, washed, and dried to obtain a pre-product; Step B3: Mix 0.15 mol 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, 40 mL N,N-dimethylformamide and 0.03 mol pre-product, stir at 150° C. for 9 h, filter, wash, and vacuum dry at 60° C. for 24 h to obtain a modified flame retardant. Example

[0015] A method for preparing an antistatic PP composite material specifically comprises the following steps: S1: Weigh the raw materials by weight, including 70 parts of PP resin, 15 parts of glass fiber, 0.3 parts of lubricant, 1.1 parts of modified antistatic agent (prepared in this example), 1 part of modified flame retardant (prepared in this example), and 0.5 parts of antioxidant, mix the PP resin and the glass fiber to prepare a premixed material; S2: Add ethylene bisstearic acid amide, modified antistatic agent, modified flame retardant and antioxidant 1098 to the premixed material and mix them evenly, and stir them in a high-speed mixer for 8 minutes to obtain a mixed base material; S3: The mixed base material is placed in a twin-screw extruder at 220°C for extrusion and granulation, the screw speed is controlled at 475r / min, and injection molding is performed by an injection molding machine to obtain an antistatic PP composite material; The modified antistatic agent is prepared by the following method: Step A1: 1 mol of lauric acid, 1.2 mol of diethanolamine and 0.09 g of sodium methoxide were mixed evenly, the reactor system was replaced with nitrogen for 1 min, stirred for 5 min, slowly heated to 175° C., reacted for 3 h, filtered, washed and dried to obtain intermediate 1; Step A2: 3 mol of 6-chloro-1-hexene, 1.5 mol of intermediate 1 and 2 mL of methanol were mixed, stirred at 80° C., reacted for 12 h, cooled to room temperature, and dried under nitrogen protection to obtain intermediate 2; Step A3: 0.3 mol of maleic anhydride and 1.65 g of isoamyl acetate were mixed and reacted for 3 h. Under nitrogen protection, 0.28 g of azobisisobutyronitrile, 90 mL of toluene and 2.09 g of intermediate 2 were added and stirred evenly. The mixture was reacted at 70° C. for 6 h, centrifuged, washed, and dried in vacuo at 45° C. to obtain a modified antistatic agent. The modified flame retardant is prepared by the following method: Step B1: Add 9.6 g of phenylphosphonic acid and 9.4 g of anhydrous piperazine to a three-necked flask equipped with a thermometer, a water separator and a reflux condenser, and heat to 110°C for reaction for 1 h. Continue to heat to 150°C for reaction for 8 h, evacuate for 0.5 h, cool, add 52 mL of acetone, wash, filter, and vacuum dry to obtain a piperazine derivative; Step B2: Under a nitrogen environment, 12 g of a piperazine derivative, 5 g of methylvinyldichlorosilane, 11.5 g of pyridine and 200 mL of acetonitrile were mixed evenly, stirred and dispersed, heated to 85° C., reacted for 10 h, and after the reaction was completed, vacuum distilled, washed, and dried to obtain a pre-product; Step B3: 0.2 mol 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, 50 mL N,N-dimethylformamide and 0.04 mol pre-product were mixed, stirred at 150° C. for 9 h, filtered, washed, and vacuum dried at 60° C. for 24 h to obtain a modified flame retardant. Example

[0016] A method for preparing an antistatic PP composite material specifically comprises the following steps: S1: Weigh the raw materials by weight, including 80 parts of PP resin, 20 parts of glass fiber, 0.5 parts of lubricant, 2 parts of modified antistatic agent (prepared in this embodiment), 1.5 parts of modified flame retardant (prepared in this embodiment), and 0.8 parts of antioxidant, mix the PP resin and the glass fiber to prepare a premixed material; S2: Add ethylene bisstearamide, modified antistatic agent, modified flame retardant and antioxidant 1098 to the premixed material and mix them evenly, and stir them in a high-speed mixer for 10 minutes to obtain a mixed base material; S3: placing the mixed base material in a twin-screw extruder at 240°C for extrusion and granulation, with the screw speed controlled at 500r / min, and injection molding by an injection molding machine to obtain an antistatic PP composite material; The modified antistatic agent is prepared by the following method: Step A1: 1.1 mol of lauric acid, 1.4 mol of diethanolamine and 0.12 g of sodium methoxide were mixed evenly, the reactor system was replaced with nitrogen for 1 min, stirred for 5 min, slowly heated to 180° C., reacted for 3 h, filtered, washed and dried to obtain intermediate 1; Step A2: 4 mol of 6-chloro-1-hexene, 2 mol of intermediate 1 and 2 mL of methanol were mixed, stirred at 80° C., reacted for 12 h, cooled to room temperature, and dried under nitrogen protection to obtain intermediate 2; Step A3: 0.4 mol of maleic anhydride and 2.13 g of isoamyl acetate were mixed and reacted for 3 h. Under nitrogen protection, 0.36 g of azobisisobutyronitrile, 90 mL of toluene and 3.12 g of intermediate 2 were added and stirred evenly. The mixture was reacted at 70° C. for 6 h, centrifuged, washed, and dried in vacuo at 45° C. to obtain a modified antistatic agent. The modified flame retardant is prepared by the following method: Step B1: Add 11.4 g of phenylphosphonic acid and 10.2 g of anhydrous piperazine to a three-necked flask equipped with a thermometer, a water separator and a reflux condenser, and heat to 110° C. for reaction for 1 h. Continue to heat to 150° C. for reaction for 8 h, evacuate for 0.5 h, cool, add 65 mL of acetone, wash, filter, and vacuum dry to obtain a piperazine derivative; Step B2: Under a nitrogen environment, 15 g of a piperazine derivative, 5 g of methylvinyldichlorosilane, 13 g of pyridine and 200 mL of acetonitrile were mixed evenly, stirred and dispersed, heated to 85° C., reacted for 10 h, and after the reaction was completed, vacuum distilled, washed, and dried to obtain a pre-product; Step B3: Mix 0.25 mol 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, 60 mL N,N-dimethylformamide and 0.05 mol pre-product, stir at 150° C. for 9 h, filter, wash, and vacuum dry at 60° C. for 24 h to obtain a modified flame retardant.

[0017] Comparative Example 1 This comparative example is an antistatic PP composite material, which is different from Example 3 in that an equal amount of octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate is used to replace the modified antistatic agent prepared in Example 3, and the rest are the same.

[0018] Comparative Example 2 This comparative example is an antistatic PP composite material, which differs from Example 3 in that an equal amount of magnesium hydroxide is used to replace the modified flame retardant prepared in Example 3, and the rest are the same.

[0019] Performance test: The antistatic PP composite materials prepared in Examples 1-3 and Comparative Examples 1-2 were cut into standard test sizes, and the surface resistivity was tested according to GB / T1410-2006. The vertical burning performance was tested using the GB / T2048-1996 plastic burning performance test method. The tensile strength was tested according to GB / T1040.1-2006 (the tensile strength of polypropylene plastic is 33.05 MPa). The test results are shown in the following table: Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Surface resistivity / Ω <![CDATA[8.5×10 13 ]]> <![CDATA[9.2×10 13 ]]> <![CDATA[7.8×10 13 ]]> <![CDATA[5.6×10 14 ]]> <![CDATA[6.2×10 15 ]]> Vertical burning level V-1 V-1 V-1 V-1 V-2 Tensile strength / Mpa 43.05 43.6 44.15 43.01 42.9 It can be seen from the test data in the table that the antistatic PP composite material prepared in Example 1 not only has a good antistatic effect, effectively ensures the safety of the material, but also has excellent tensile resistance. It can also be seen from the above table that the antistatic PP composite material prepared in the present invention has an excellent flame retardant effect, effectively inhibits the combustion process, reduces the possibility of fire, and prolongs the service life of the material.

[0020] The above contents are merely examples and explanations of the concept of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A method for preparing an antistatic PP composite material, characterized in that: The following steps are involved: S1: weigh the raw materials by weight, including 60-80 parts of PP resin, 10-20 parts of glass fiber, 0.1-0.5 parts of lubricant, 0.3-2 parts of modified antistatic agent, 0.5-1.5 parts of modified flame retardant, and 0.2-0.8 parts of antioxidant; mix the PP resin and the glass fiber to obtain a premixed material; S2: adding lubricant, modified antistatic agent, modified flame retardant and antioxidant to the premixed material and mixing them evenly, stirring them in a high-speed mixer for 5-10 minutes to obtain a mixed base material; S3: The mixed base material is placed in a twin-screw extruder at 200°C-240°C for extrusion granulation, the screw speed is controlled at 450-500r / min, and injection molding is performed by an injection molding machine to obtain an antistatic PP composite material.

2. The method for preparing an antistatic PP composite material according to claim 1, characterized in that: The modified antistatic agent is prepared by the following method: Step A1: lauric acid, diethanolamine and sodium methoxide were mixed evenly, the reactor system was replaced with nitrogen for 1 min, stirred for 5 min, slowly heated to 170-180° C., reacted for 3 h, filtered, washed and dried to obtain intermediate 1; Step A2: 6-chloro-1-hexene, intermediate 1 and methanol were mixed, stirred at 80° C., reacted for 12 h, cooled to room temperature, and dried under nitrogen protection to obtain intermediate 2; Step A3: maleic anhydride and isoamyl acetate are mixed and reacted for 3 hours. Under nitrogen protection, azobisisobutyronitrile, toluene and intermediate 2 are added and stirred evenly. The mixture is reacted at 70° C. for 6 hours, centrifuged, washed, and vacuum dried at 45° C. to obtain a modified antistatic agent.

3. The method for preparing an antistatic PP composite material according to claim 2, characterized in that: In step A1, the usage ratio of lauric acid, diethanolamine and sodium methoxide is 0.9-1.1 mol: 1.0-1.4 mol: 0.06-0.12 g.

4. The method for preparing an antistatic PP composite material according to claim 2, characterized in that: In step A2, the usage ratio of 6-chloro-1-hexene, intermediate 1 and methanol is 2-4 mol: 1-2 mol: 2 mL.

5. The method for preparing an antistatic PP composite material according to claim 2, characterized in that: In step A3, the usage ratio of maleic anhydride, isoamyl acetate, azobisisobutyronitrile, toluene and intermediate 2 is 0.2-0.4 mol: 1.16-2.13 g: 0.21-0.36 g: 90 mL: 1.06-3.12 g.

6. The method for preparing an antistatic PP composite material according to claim 1, characterized in that: The modified flame retardant is prepared by the following method: Step B1: Add phenylphosphonic acid and anhydrous piperazine to a three-necked flask equipped with a thermometer, a water separator and a reflux condenser, heat to 110°C for reaction for 1 hour, continue to heat to 150°C for reaction for 8 hours, evacuate for 0.5 hour, cool, add acetone, wash, filter and vacuum dry to obtain a piperazine derivative; Step B2: Under a nitrogen environment, piperazine derivatives, methylvinyldichlorosilane, pyridine and acetonitrile are uniformly mixed, stirred and dispersed, heated to 85° C., reacted for 10 hours, and after the reaction, vacuum distilled, washed and dried to obtain a pre-product; Step B3: Mix 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, N,N-dimethylformamide and the pre-product, stir at 150° C. for 9 h, filter, wash, and vacuum dry at 60° C. for 24 h to obtain a modified flame retardant.

7. The method for preparing an antistatic PP composite material according to claim 6, characterized in that: In step B1, the usage ratio of phenylphosphonic acid, anhydrous piperazine and acetone is 7.7-11.4 g: 8.6-10.2 g: 40-65 mL.

8. The method for preparing an antistatic PP composite material according to claim 6, characterized in that: In step B2, the usage ratio of piperazine derivative, methylvinyldichlorosilane, pyridine and acetonitrile is 10-15 g: 5 g: 10-13 g: 200 mL.

9. The method for preparing an antistatic PP composite material according to claim 6, characterized in that: In step B3, the usage ratio of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, N,N-dimethylformamide and pre-product is 0.15-0.25 mol:40-60 mL:0.03-0.05 mol.

10. An antistatic PP composite material, characterized in that: Prepared according to the preparation method according to any one of claims 1 to 9.