Halogen-free flame-retardant multi-color antistatic composite material with high fluidity

Abstract

The application provides a high-fluidity halogen-free flame-retardant multi-color antistatic composite material, which comprises the following components in parts by weight: PC, 36-88 parts; ABS, 5-25 parts; toughening agent, 1-10 parts; antistatic agent, 0.5-3.9 parts; antioxidant, 0.05-2 parts; anti-dripping agent, 0.05-2 parts; flame retardant, 5-20 parts; wherein the antistatic agent is a liquid antistatic material or a combination of a liquid antistatic material and a solid antistatic material. The application has the beneficial effect that the composite material does not contain dangerous halogen compounds, does not cause harm to human health, can reduce the risk of secondary pollution during recycling and reuse, is more environmentally friendly, and the prepared composite material has good flame-retardant effect, antistatic property and fluidity, and can be customized in color according to product requirements, thereby meeting the market demand for multi-color products.

Description

[Technical Field]

[0001] This invention relates to the field of composite material technology, and in particular to a high-flowability halogen-free flame-retardant and antistatic composite material. [Background Technology]

[0002] PC / ABS composite material is a thermoplastic composite material made of PC (polycarbonate) and ABS (acrylonitrile-butadiene-styrene terpolymer). It combines the easy molding of ABS with the excellent mechanical properties, temperature resistance, and UV resistance of PC, and is widely used in automotive interior and exterior parts, office supplies, communication equipment, home appliances, and lighting equipment. PC / ABS composite materials are also increasingly used in the new energy and 3C electronics industries (such as battery covers and TV frames). The new energy and 3C electronics industries require composite materials to possess thin-wall flame-retardant properties (composite materials must meet the UL94 1.2mmV-0 flame-retardant rating requirement) and certain antistatic properties. However, the butadiene segments (similar to rubber) contained in ABS significantly reduce the flame-retardant properties of composite materials, making it difficult to meet the market's demand for the UL94 1.2mmV-0 flame-retardant rating for thin-walled materials. Considering the overall effect, cost, and ease of implementation, the commonly used method of adding traditional conductive materials (such as carbon nanotubes, carbon black, and graphene) to improve the antistatic effect of composite materials can improve their antistatic properties, but it reduces the flow properties of the composite materials. Furthermore, the addition of these traditional conductive materials limits the finished product to black, failing to meet the market's demand for multi-colored products.

[0003] In view of this, the present invention provides a high-flowability halogen-free flame-retardant multicolor antistatic composite material to solve the above problems. [Summary of the Invention]

[0004] To address the issues that the butadiene segments in ABS within PC / ABS composites significantly reduce the flame retardant properties of the composites, making it difficult to meet the market demand for UL94 1.2mm V-0 flame retardant ratings for thin-walled materials, and that while adding traditional conductive materials such as carbon nanotubes, carbon black, and graphene to PC / ABS composites can improve antistatic effects, it reduces the composite's flowability and limits the finished product to a black appearance, failing to meet market demands for colorful products, this invention provides a high-flowability, halogen-free, flame-retardant, multi-colored, and antistatic composite material to solve the aforementioned problems.

[0005] The solution to the technical problem of this invention is: a high-flowability, halogen-free, flame-retardant, multicolored, and antistatic composite material, comprising the following components in parts by weight:

[0006] PC, 36-88 copies;

[0007] ABS, 5-25 parts;

[0008] Toughening agent, 1-10 parts;

[0009] Antistatic agent, 0.5–3.9 parts;

[0010] Antioxidant, 0.05–2 parts;

[0011] Anti-dripping agent, 0.05–2 parts;

[0012] Flame retardant, 5-20 parts;

[0013] The antistatic agent is a liquid antistatic material or a mixture of a liquid antistatic material and a solid antistatic material.

[0014] Preferably, the PC is one or more of the following: bisphenol A type PC, polyester type PC, organosilicon copolymer PC, cyclohexane bisphenol A type PC, and PC synthesized from bisphenol TMC. The melt flow rate MI of the PC is (5-70) g / 10 min (300℃ / 1.2Kg), the weight average molecular weight is 20,000-50,000, and the molecular weight distribution is 1-2.5.

[0015] Preferably, the PC is made from recycled PC.

[0016] Preferably, the ABS is copolymer ABS, wherein every 100 parts by weight of ABS includes 10 to 30 parts by weight of acrylonitrile, 5 to 30 parts by weight of butadiene, and 30 to 60 parts by weight of styrene.

[0017] Preferably, the toughening agent is one or more of the following: unsaturated rubber toughening agents, saturated rubber toughening agents, styrene-based thermoplastic elastomer toughening agents, polyurethane-based thermoplastic elastomer toughening agents, polyolefin-based thermoplastic elastomer toughening agents, polyamide-based thermoplastic elastomer toughening agents, high-rubber powder toughening agents, and acrylate copolymer toughening agents.

[0018] Preferably, the solid antistatic material includes carbon nanotubes, carbon black, and graphene; the liquid antistatic material includes polyacetylene and its derivatives, polypyrrole and its derivatives, polythiophene and its derivatives, poly(p-styrene) and its derivatives, and polyaniline and its derivatives.

[0019] Preferably, the antioxidant is one or more of hindered phenolic antioxidants, phosphite antioxidants, and thiolated antioxidants.

[0020] Preferably, the anti-dripping agent is a fluorinated polytetrafluoroethylene material, including coated polytetrafluoroethylene and uncoated polytetrafluoroethylene.

[0021] Preferably, the flame retardant is one or more of the following: hypophosphite flame retardants, phosphate ester flame retardants, sulfonate flame retardants, and organosilicon flame retardants.

[0022] A method for preparing a high-flowability halogen-free flame-retardant multicolor antistatic composite material, characterized in that the components are mixed evenly and then fed into an extruder for extrusion granulation, wherein the extruder is a twin-screw extruder, the processing temperature range of the extruder is set to 220℃~240℃, and the screw speed of the extruder is 450~550RPM.

[0023] The beneficial effects of this invention are that the composite material does not contain dangerous halogen compounds and will not cause harm to human health. When recycled and reused, it can reduce the risk of secondary pollution and is relatively environmentally friendly. The resulting composite material has good flame retardant effect, antistatic properties and flow properties, and can be customized in color according to product requirements to meet the market demand for colorful products.

Detailed Implementation Methods

[0024] To further illustrate the technical means and effects of the present invention, the following detailed description is provided in conjunction with embodiments of the present invention.

[0025] This invention provides a high-flowability halogen-free flame-retardant multicolor antistatic composite material, comprising the following components in parts by weight:

[0026] PC, 36-88 copies;

[0027] ABS, 5-25 parts;

[0028] Toughening agent, 1-10 parts;

[0029] Antistatic agent, 0.5–3.9 parts;

[0030] Antioxidant, 0.05–2 parts;

[0031] Anti-dripping agent, 0.05–2 parts;

[0032] Flame retardant, 5-20 parts;

[0033] The antistatic agent is a liquid antistatic material or a mixture of liquid and solid antistatic materials.

[0034] The PC is one or more of the following: bisphenol A type PC, polyester type PC, organosilicon copolymer PC, cyclohexane bisphenol A type PC, and PC synthesized from bisphenol TMC. The melt flow rate MI of the PC is (5-70) g / 10 min (300℃ / 1.2Kg), the weight average molecular weight is 20,000-50,000, and the molecular weight distribution is 1-2.5.

[0035] The PC used is recycled PC (PCR PC).

[0036] The ABS is a copolymer ABS, wherein every 100 parts by weight of ABS includes 10 to 30 parts by weight of acrylonitrile, 5 to 30 parts by weight of butadiene, and 30 to 60 parts by weight of styrene.

[0037] The toughening agent is one or more of the following: unsaturated rubber toughening agents, saturated rubber toughening agents, styrene thermoplastic elastomer toughening agents, polyurethane thermoplastic elastomer toughening agents, polyolefin thermoplastic elastomer toughening agents, polyamide thermoplastic elastomer toughening agents, high-rubber powder toughening agents, and acrylate copolymer toughening agents.

[0038] The unsaturated rubber toughening agents include nitrile rubber, natural rubber, styrene-butadiene rubber, and cis-butadiene rubber; the saturated rubber toughening agents include butyl rubber, ethylene propylene rubber, ethylene propylene diene monomer (EPDM) rubber, and halogenated butyl rubber; the styrene-based thermoplastic elastomer toughening agents include methyl methacrylate-butadiene-styrene terpolymer, styrene-butadiene-styrene copolymer, hydrogenated SBS, and styrene-isoprene-styrene; the polyurethane-based thermoplastic elastomer toughening agents include TPU; the polyolefin-based thermoplastic elastomer toughening agents include chlorinated polyethylene, ethylene-octene copolymer, thermoplastic dynamic vulcanizate, and ethylene-vinyl acetate copolymer; the polyamide-based thermoplastic elastomer toughening agents include TPAE; and the acrylate copolymer toughening agents include ACR.

[0039] The solid antistatic material includes carbon nanotubes, carbon black, and graphene; the liquid antistatic material includes polyacetylene (PA) and its derivatives, polypyrrole (PPY) and its derivatives, polythiophene (PTH) and its derivatives, poly(p-phenylene styrene) (PPV) and its derivatives, and polyaniline (PANI) and its derivatives.

[0040] The antioxidant is one or more of hindered phenolic antioxidants, phosphite antioxidants, and thiolated antioxidants.

[0041] The hindered phenolic antioxidants include (β-3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl acrylate; the phosphite antioxidants include tris(2,4-di-tert-butylphenyl) phosphite and pentaerythritol dioctadecyl alcohol diphosphite.

[0042] The anti-dripping agent is a fluorinated polytetrafluoroethylene (PTFE) material, including coated PTFE and uncoated PTFE.

[0043] The flame retardant is one or more of the following: hypophosphite flame retardants, phosphate ester flame retardants, sulfonate flame retardants, and organosilicon flame retardants.

[0044] The hypophosphite-based flame retardants include vinyl aluminum hypophosphite and vinyl phosphoric acid; the phosphate ester-based flame retardants include 1,3-phenylene phosphate (2,6-tolyl) tetraester, tetraphenyl bisphenol A diphosphate and its derivatives (BDP), tetraphenyl resorcinol diphosphate and its derivatives (RDP), and triphenyl phosphate (TPP); the sulfonate-based flame retardants include potassium benzenesulfonylbenzenesulfonate (KSS), potassium perfluorobutyl sulfonate (PPFBS), and sodium 2,4,5-trichlorobenzenesulfonate (STB); and the organosilicon-based flame retardants include polysiloxane and its derivatives, and cross-linked polydimethylsiloxane (PDMS) and its derivatives.

[0045] Example 1

[0046] A high-flowability halogen-free flame-retardant multicolor antistatic composite material comprises the following components in parts by weight: 71.8 parts PC, 12 parts ABS, 5 parts toughening agent, 1 part antistatic agent, 0.3 parts antioxidant, 0.4 parts anti-dripping agent, and 9.5 parts flame retardant.

[0047] The PC in question is recycled PC, specifically Fangtai FT-15 type PCR PC, with a melt flow rate MI = 15 g / 10 min (300℃ / 1.2 Kg), a weight-average molecular weight of 47,000 to 50,000, and a molecular weight distribution of 1.8 to 2.0.

[0048] The ABS is a copolymer ABS, with a notched impact strength of 28.6 kJ / m2 and a melt flow rate of MI = 8.9 g / 10 min (260℃ / 2.16 kg) under ISO180 testing conditions.

[0049] The toughening agent is a styrene-based thermoplastic elastomer toughening agent, specifically a methyl methacrylate-butadiene-styrene terpolymer (MBS), which can significantly improve the impact resistance of resins and engineering plastics. It also has excellent low-temperature impact resistance and hydrolysis resistance, making it suitable for complex operating environments.

[0050] The antistatic agent is poly(3,4-ethylenedioxythiophene):poly(styrene sulfonic acid) (PEDOT:PSS), which is a doped derivative of PEDOT and a composite of a polyanionic alternative polythiophene ionic polymer. It has good compatibility with resins, a pH value of 8-9, and a light blue liquid appearance.

[0051] The 0.3 parts antioxidant is a combination of 0.24 parts hindered phenolic antioxidant and 0.06 parts phosphite antioxidant. The two have a significant synergistic effect and are characterized by low addition amount and significant antioxidant and anti-yellowing effects. The hindered phenolic antioxidant is octadecyl acrylate (β-3,5-di-tert-butyl-4-hydroxyphenyl) acrylate (antioxidant 1076), and the phosphite antioxidant is tris(2,4-di-tert-butylphenyl) phosphite (antioxidant 168).

[0052] The anti-dripping agent is coated polytetrafluoroethylene (PTFE), with a PTFE content of 50%, a styrene content of 40%, and an acrylonitrile content of 10%, and features low addition amount and significant anti-dripping effect.

[0053] The flame retardant is a phosphate ester flame retardant, specifically tetraphenylbisphenol A diphosphate and its derivative flame retardant (BDP). It is a pale yellow liquid with high viscosity at room temperature (25°C) and good fluidity above 70°C. The phosphorus (P) element content in the key flame retardant component is ≥8.9%.

[0054] To prepare this high-flowability halogen-free flame-retardant multicolor antistatic composite material, the corresponding weight parts of the components were weighed according to the above proportions, and the components were mixed evenly and then fed into an extruder. After the mixture of the components was sheared, mixed and conveyed by the extruder screw, it was fully melted and compounded, and then extruded through the die head, drawn into strips, cooled and pelletized to finally obtain finished particles with a blue appearance. The extruder is a twin-screw extruder, the processing temperature range of the extruder is set to 220℃~240℃, and the screw speed of the extruder is 450~550RPM.

[0055] Example 2

[0056] A high-flowability halogen-free flame-retardant multicolor antistatic composite material comprises the following components in parts by weight: 70.8 parts PC, 12 parts ABS, 5 parts toughening agent, 2 parts antistatic agent, 0.3 parts antioxidant, 0.4 parts anti-dripping agent, and 9.5 parts flame retardant.

[0057] The PC in question is recycled PC, specifically Fangtai FT-15 type PCR PC, with a melt flow rate MI = 15 g / 10 min (300℃ / 1.2 Kg), a weight-average molecular weight of 47,000 to 50,000, and a molecular weight distribution of 1.8 to 2.0.

[0058] The ABS is a copolymer ABS, with a notched impact strength of 28.6 kJ / m2 and a melt flow rate of MI = 8.9 g / 10 min (260℃ / 2.16 kg) under ISO180 testing conditions.

[0059] The toughening agent is a styrene-based thermoplastic elastomer toughening agent, specifically a methyl methacrylate-butadiene-styrene terpolymer (MBS), which can significantly improve the impact resistance of resins and engineering plastics. It also has excellent low-temperature impact resistance and hydrolysis resistance, making it suitable for complex operating environments.

[0060] The antistatic agent is poly(3,4-ethylenedioxythiophene):poly(styrene sulfonic acid) (PEDOT:PSS), which is a doped derivative of PEDOT and a composite of a polyanionic alternative polythiophene ionic polymer. It has good compatibility with resins, a pH value of 8-9, and a light blue liquid appearance.

[0061] The 0.3 parts antioxidant is a combination of 0.24 parts hindered phenolic antioxidant and 0.06 parts phosphite antioxidant. The two have a significant synergistic effect and are characterized by low addition amount and significant antioxidant and anti-yellowing effects. The hindered phenolic antioxidant is octadecyl acrylate (β-3,5-di-tert-butyl-4-hydroxyphenyl) acrylate (antioxidant 1076), and the phosphite antioxidant is tris(2,4-di-tert-butylphenyl) phosphite (antioxidant 168).

[0062] The anti-dripping agent is coated polytetrafluoroethylene (PTFE), with a PTFE content of 50%, a styrene content of 40%, and an acrylonitrile content of 10%, and features low addition amount and significant anti-dripping effect.

[0063] The flame retardant is a phosphate ester flame retardant, specifically tetraphenylbisphenol A diphosphate and its derivative flame retardant (BDP). It is a pale yellow liquid with high viscosity at room temperature (25°C) and good fluidity above 70°C. The phosphorus (P) element content in the key flame retardant component is ≥8.9%.

[0064] To prepare this high-flowability halogen-free flame-retardant multicolor antistatic composite material, the corresponding weight parts of the components were weighed according to the above proportions, and the components were mixed evenly and then fed into an extruder. After the mixture of the components was sheared, mixed and conveyed by the extruder screw, it was fully melted and compounded, and then extruded through the die head, drawn into strips, cooled and pelletized to finally obtain finished particles with a blue appearance. The extruder is a twin-screw extruder, the processing temperature range of the extruder is set to 220℃~240℃, and the screw speed of the extruder is 450~550RPM.

[0065] Comparative Example 1

[0066] A composite material comprising the following components in parts by weight: 72.8 parts PC, 12 parts ABS, 5 parts toughening agent, 0.3 parts antioxidant, 0.4 parts anti-dripping agent, and 9.5 parts flame retardant.

[0067] The PC in question is recycled PC, specifically Fangtai FT-15 type PCR PC, with a melt flow rate MI = 15 g / 10 min (300℃ / 1.2 Kg), a weight-average molecular weight of 47,000 to 50,000, and a molecular weight distribution of 1.8 to 2.0.

[0068] The ABS is a copolymer ABS, with a notched impact strength of 28.6 kJ / m2 and a melt flow rate of MI = 8.9 g / 10 min (260℃ / 2.16 kg) under ISO180 testing conditions.

[0069] The toughening agent is a styrene-based thermoplastic elastomer toughening agent, specifically a methyl methacrylate-butadiene-styrene terpolymer (MBS).

[0070] The 0.3 parts of antioxidant are a combination of 0.24 parts of hindered phenolic antioxidant and 0.06 parts of phosphite antioxidant. The hindered phenolic antioxidant is octadecyl acrylate (β-3,5-di-tert-butyl-4-hydroxyphenyl) acrylate (antioxidant 1076), and the phosphite antioxidant is tris(2,4-di-tert-butylphenyl) phosphite (antioxidant 168).

[0071] The anti-dripping agent is coated polytetrafluoroethylene (PTFE), wherein the PTFE content is 50%, the styrene content is 40%, and the acrylonitrile content is 10%.

[0072] The flame retardant is a phosphate ester flame retardant, specifically tetraphenylbisphenol A diphosphate and its derivatives (BDP).

[0073] To prepare the composite material, the corresponding weight parts of the components are weighed according to the above proportions, and the components are mixed evenly and then fed into an extruder. After the mixture of the components is sheared, mixed and conveyed by the extruder screw, it is fully melted and compounded. Then it is extruded through the die head, drawn into strips, cooled and pelletized to finally obtain the finished particles. The extruder is a twin-screw extruder, the processing temperature range of the extruder is set to 220℃~240℃, and the screw speed of the extruder is 450~550RPM.

[0074] Comparative Example 2

[0075] A composite material comprising the following components in parts by weight: 68.8 parts PC, 12 parts ABS, 5 parts toughening agent, 4 parts antistatic agent, 0.3 parts antioxidant, 0.4 parts anti-dripping agent, and 9.5 parts flame retardant.

[0076] The PC in question is recycled PC, specifically Fangtai FT-15 type PCR PC, with a melt flow rate MI = 15 g / 10 min (300℃ / 1.2 Kg), a weight-average molecular weight of 47,000 to 50,000, and a molecular weight distribution of 1.8 to 2.0.

[0077] The ABS is a copolymer ABS, with a notched impact strength of 28.6 kJ / m2 and a melt flow rate of MI = 8.9 g / 10 min (260℃ / 2.16 kg) under ISO180 testing conditions.

[0078] The toughening agent is a styrene-based thermoplastic elastomer toughening agent, specifically a methyl methacrylate-butadiene-styrene terpolymer (MBS).

[0079] The antistatic agent is poly(3,4-ethylenedioxythiophene):poly(styrene sulfonic acid) (PEDOT:PSS), which is a doped derivative of PEDOT and a composite of a polyanionic alternative polythiophene ionic polymer. It has good compatibility with resins, a pH value of 8-9, and a light blue liquid appearance.

[0080] The 0.3 parts of antioxidant are a combination of 0.24 parts of hindered phenolic antioxidant and 0.06 parts of phosphite antioxidant. The hindered phenolic antioxidant is octadecyl acrylate (β-3,5-di-tert-butyl-4-hydroxyphenyl) acrylate (antioxidant 1076), and the phosphite antioxidant is tris(2,4-di-tert-butylphenyl) phosphite (antioxidant 168).

[0081] The anti-dripping agent is coated polytetrafluoroethylene (PTFE), wherein the PTFE content is 50%, the styrene content is 40%, and the acrylonitrile content is 10%.

[0082] The flame retardant is a phosphate ester flame retardant, specifically tetraphenylbisphenol A diphosphate and its derivatives (BDP).

[0083] To prepare the composite material, the corresponding weight parts of the components are weighed according to the above proportions, and the components are mixed evenly and then fed into an extruder. After the mixture of the components is sheared, mixed and conveyed by the extruder screw, it is fully melted and compounded. Then it is extruded through the die head, drawn into strips, cooled and pelletized to finally obtain finished particles with a blue appearance. The extruder is a twin-screw extruder, the processing temperature range of the extruder is set to 220℃~240℃, and the screw speed of the extruder is 450~550RPM.

[0084] The particles from Examples 1, 2, Comparative Example 1, and Comparative Example 2 were injection molded into standard test strips on an injection molding machine. The test strips were then subjected to relevant physical property tests according to the standard. The test results are shown in Table 1.

[0085] Table 1 Test Results

[0086]

[0087]

[0088] The test results above show that this invention achieves the preparation of a high-flowability, halogen-free, flame-retardant, multi-colored, and antistatic composite material by adding a certain amount of toughening agent, antistatic agent, antioxidant, anti-dripping agent, and flame retardant to PC and ABS. The prepared composite material has the following advantages: it does not contain dangerous halogen compounds and will not cause harm to human health; it can reduce the risk of secondary pollution during recycling and reuse, making it relatively environmentally friendly; it can improve the flowability of the composite material without adding lubricants and halogen-containing flame retardants; at the same time, controlling the amount of antistatic agent added can reduce the adverse effects of small molecule liquid antistatic materials on the flame retardancy of the composite material, enabling the composite material to have UL94 1.2mmV-0 flame retardant performance while improving the antistatic ability of the composite material; and it can be customized in color according to product requirements to meet the market demand for multi-colored products.

[0089] It should be noted that the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and alterations made by those skilled in the art to the above embodiments based on the technical solutions of the present invention shall fall within the protection scope of the present invention.

Claims

1. A high-flowability, halogen-free, flame-retardant, multicolored, antistatic composite material, characterized in that, The components include the following parts by weight: PC, 36-88 copies; ABS, 5-25 parts; Toughening agent, 1-10 parts; Antistatic agent, 0.5–3.9 parts; Antioxidant, 0.05–2 parts; Anti-dripping agent, 0.05–2 parts; Flame retardant, 5-20 parts; The antistatic agent is a liquid antistatic material or a mixture of liquid and solid antistatic materials.

2. The high-flowability, halogen-free, flame-retardant, multi-colored, antistatic composite material as described in claim 1, characterized in that: The PC is one or more of the following: bisphenol A type PC, polyester type PC, organosilicon copolymer PC, cyclohexane bisphenol A type PC, and PC synthesized from bisphenol TMC. The melt flow rate MI of the PC is (5-70) g / 10 min (300℃ / 1.2Kg), the weight average molecular weight is 20,000-50,000, and the molecular weight distribution is 1-2.

5.

3. The high-flowability halogen-free flame-retardant multicolor antistatic composite material as described in claim 1, characterized in that: The PC used is made from recycled PC.

4. The high-flowability halogen-free flame-retardant multicolor antistatic composite material as described in claim 1, characterized in that: The ABS is a copolymer ABS, wherein every 100 parts by weight of ABS includes 10 to 30 parts by weight of acrylonitrile, 5 to 30 parts by weight of butadiene, and 30 to 60 parts by weight of styrene.

5. The high-flowability halogen-free flame-retardant multicolor antistatic composite material as described in claim 1, characterized in that: The toughening agent is one or more of the following: unsaturated rubber toughening agents, saturated rubber toughening agents, styrene-based thermoplastic elastomer toughening agents, polyurethane-based thermoplastic elastomer toughening agents, polyolefin-based thermoplastic elastomer toughening agents, polyamide-based thermoplastic elastomer toughening agents, high-rubber powder toughening agents, and acrylate copolymer toughening agents.

6. The high-flowability halogen-free flame-retardant multicolor antistatic composite material as described in claim 1, characterized in that: The solid antistatic material includes carbon nanotubes, carbon black, and graphene; the liquid antistatic material includes polyacetylene and its derivatives, polypyrrole and its derivatives, polythiophene and its derivatives, polystyrene and its derivatives, and polyaniline and its derivatives.

7. The high-flowability halogen-free flame-retardant multicolor antistatic composite material as described in claim 1, characterized in that: The antioxidant is one or more of hindered phenolic antioxidants, phosphite antioxidants, and thiolated antioxidants.

8. The high-flowability halogen-free flame-retardant multicolor antistatic composite material as described in claim 1, characterized in that: The anti-dripping agent is a fluorinated polytetrafluoroethylene material, including coated polytetrafluoroethylene and uncoated polytetrafluoroethylene.

9. The high-flowability halogen-free flame-retardant multicolor antistatic composite material as described in claim 1, characterized in that: The flame retardant is one or more of the following: hypophosphite flame retardants, phosphate ester flame retardants, sulfonate flame retardants, and organosilicon flame retardants.

10. A method for preparing a high-flowability halogen-free flame-retardant multicolor antistatic composite material according to any one of claims 1-9, characterized in that: After the components are mixed evenly, they are fed into an extruder for granulation. The extruder is a twin-screw extruder, and the processing temperature range of the extruder is set to 220℃~240℃. The screw speed of the extruder is 450~550RPM.

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