Halogen-free flame-retardant PC composite material with high recovery ratio and high thermal deformation resistance

Abstract

The invention relates to a halogen-free flame-retardant PC (polycarbonate) composite material with high recovery ratio and high thermal deformation resistance, which comprises the following components in parts by weight: 80-90 parts of polycarbonate; 9-19 parts by mass of glass fiber; 0.1 to 10.1 parts by mass of a flame retardant; 0.3 to 10.3 parts by mass of toner; 0-10 parts by mass of a toughening agent; 0.3 to 10.3 parts by mass of an anti-dripping agent; the invention has the beneficial effects that the PC used in the invention is a recycled material and has higher environmental protection performance, the material does not contain dangerous halogen compounds, the risk of secondary pollution can be reduced during recycling, the influence on the environment is reduced, and the material takes the PC as a main body, so that the material is environment-friendly. And the GF filler is added, so that the material has certain mechanical properties.

Description

[Technical field]

[0001] The invention relates to the technical field of polycarbonate composite materials, in particular to a halogen-free flame-retardant PC composite material with high recycling ratio and high thermal deformation resistance. [Background technology]

[0002] In recent years, thinness, fashion, intelligence, and personalization have become important trends in the development of consumer electronic products. However, in order to meet the demand for thinness and lightness, while taking into account the fire resistance and extreme working environment of electronic products, material development and selection have become very important. At the same time, the use of plastic products in the world has increased year by year, and plastic waste has caused irreversible damage and pollution to the earth's environment. Therefore, using PCR (recycled plastic) materials to make high heat deformation temperature resistant and ultra-thin halogen-free flame-retardant PC composite materials is the direction of our joint efforts.

[0003] In view of this, it is necessary to provide a halogen-free flame-retardant PC composite material with a high recycling ratio and resistance to high thermal deformation to solve the above problems. [Summary of the invention]

[0004] The purpose of the present invention is to provide a halogen-free flame-retardant PC composite material with both a high recycling ratio and resistance to high thermal deformation. The PC composite material with a high recycling ratio can be prepared directly using PCR (recycled plastic) materials, and has the characteristics of flame retardancy and resistance to high thermal deformation temperature.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A halogen-free flame-retardant PC composite material having both high recycling ratio and high thermal deformation resistance, characterized in that it comprises the following components in parts by weight:

[0007] Polycarbonate (PC), 80-90 parts by mass;

[0008] Glass fiber (GF), 9-19 parts by mass;

[0009] Flame retardant, 0.1 to 10.1 parts by mass;

[0010] Toner, 0.3-10.3 parts by weight;

[0011] Toughening agent, 0 to 10 parts by mass;

[0012] Anti-dripping agent, 0.3 to 10.3 parts by mass;

[0013] Antioxidant, 0.3 to 10.3 parts by mass.

[0014] The selected polycarbonate (PC) can be one or more of bisphenol A linear polycarbonate, polyester polycarbonate, silicone copolymer polycarbonate, cyclohexane bisphenol A polycarbonate, and polycarbonate synthesized from bisphenol TMC. The melt mass flow rate MI of the polycarbonate is between (6 and 65) g / 10 min (300° C. / 1.2 kg), and the impact strength IS is between (20 and 72) kJ / m 2 , the weight average molecular weight is between 10000 and 50000, and the molecular weight distribution is between 1 and 3.

[0015] The selected glass fiber (GF) can be a combination of one or more of milled glass fiber with a length of 0.05 mm to 1 mm, chopped glass fiber with a length of 1 mm to 18 mm, and continuous glass fiber.

[0016] The flame retardant selected may be a combination of one or more of phosphate flame retardants, sulfonate flame retardants, silicone flame retardants and derivatives thereof.

[0017] The selected color powder can be a combination of one or more inorganic pigments and organic pigments.

[0018] The selected toughening agent can be a combination of one or more of core-shell acrylate-PMMA toughening agents, core-shell acrylate-SAN toughening agents, core-shell silicone-PMMA toughening agents, core-shell silicone-SAN toughening agents, cross-linked methacrylate-methyl methacrylate toughening agents, butadiene-styrene-methyl methacrylate toughening agents, silicone rubber-methyl methacrylate toughening agents and their derivatives.

[0019] The selected anti-dripping agent can be a fluorine-based PTFE material, including a coated PTFE anti-dripping material and a non-coated PTFE (pure powder type) material, and the PTFE content thereof is 40-100%.

[0020] The selected antioxidant can be a combination of one or more of hindered phenols, hindered amines, and phosphites.

[0021] A product, characterized in that the product is mainly made of PC and is prepared by using processing aids to obtain a halogen-free flame-retardant PC composite material with a high recycling ratio and resistance to high thermal deformation.

[0022] The beneficial effects of the present invention are:

[0023] 1. The PC used in the present invention is all recycled material, which has higher environmental performance;

[0024] 2. The material of the present invention does not contain any dangerous halogen compounds, which can reduce the risk of secondary pollution when recycled and reused, thereby reducing the impact on the environment;

[0025] 3. The material of the present invention is mainly PC, and GF filler is added to make the material have certain mechanical properties. Through experiments, it can be concluded that it has a tensile strength greater than 62MPa, a breaking elongation greater than 3.0%, a flexural strength greater than 110MPa, a flexural modulus greater than 3500Mpa, and a thermal conductivity greater than 6.5kJ / m 2 Notched impact strength, 0.8mm V-0 flame retardancy and heat deformation temperature above 130℃. [Specific implementation method]

[0026] In order to further illustrate the technical means and effects adopted by the present invention, the embodiments of the present invention are described in detail below.

[0027] The present invention provides a halogen-free flame-retardant PC composite material with high recycling ratio and high thermal deformation resistance, which is characterized in that it includes the following components in parts by weight:

[0028] Polycarbonate (PC), 80-90 parts by mass;

[0029] Glass fiber (GF), 9-19 parts by mass;

[0030] Flame retardant, 0.1 to 10.1 parts by mass;

[0031] Toner, 0.3-10.3 parts by weight;

[0032] Toughening agent, 0 to 10 parts by mass;

[0033] Anti-dripping agent, 0.3 to 10.3 parts by mass;

[0034] Antioxidant, 0.3 to 10.3 parts by mass.

[0035] The selected polycarbonate (PC) can be one or more of bisphenol A linear polycarbonate, polyester polycarbonate, silicone copolymer polycarbonate, cyclohexane bisphenol A polycarbonate, and polycarbonate synthesized from bisphenol TMC. The melt mass flow rate MI of the polycarbonate is between (6 and 65) g / 10 min (300° C. / 1.2 kg), and the impact strength IS is between (20 and 72) kJ / m 2 , the weight average molecular weight is between 10000 and 50000, and the molecular weight distribution is between 1 and 3.

[0036] The selected glass fiber (GF) can be a combination of one or more of milled glass fiber with a length of 0.05 mm to 1 mm, chopped glass fiber with a length of 1 mm to 18 mm, and continuous glass fiber.

[0037] The selected flame retardant can be a combination of one or more of phosphate flame retardants (such as 1,3-phenylene (2,6-tolyl) tetraphosphate, tetraphenyl bisphenol A diphosphate and its derivative flame retardants (BDP), tetraphenyl resorcinol diphosphate and its derivatives (RDP) flame retardants, triphenyl phosphate (TPP) flame retardants), sulfonate flame retardants (such as potassium benzenesulfonylbenzenesulfonate (KSS), potassium perfluorobutyl sulfonate (PPFBS), sodium 2,4,5-trichlorobenzenesulfonate (STB)), silicone flame retardants (such as polysilicon borane and its derivative flame retardants, cross-linked polydimethylsiloxane (PDMS)) and their derivatives.

[0038] The selected color powder can be a combination of one or more inorganic pigments (such as metal oxides, sulfides, sulfates, chromates, molybdates, carbon black, titanium dioxide, pearlescent powder) and organic pigments (such as azo pigments, phthalocyanine pigments, masterbatches).

[0039] The selected toughening agent can be a combination of one or more of core-shell acrylate-PMMA toughening agents, core-shell acrylate-SAN toughening agents, core-shell silicone-PMMA toughening agents, core-shell silicone-SAN toughening agents, cross-linked methacrylate-methyl methacrylate toughening agents, butadiene-styrene-methyl methacrylate toughening agents, silicone rubber-methyl methacrylate toughening agents and their derivatives.

[0040] The selected anti-dripping agent can be a fluorine-based PTFE material, including a coated PTFE anti-dripping material and a non-coated PTFE (pure powder type) material, and the PTFE content thereof is 40-100%.

[0041] The selected antioxidant can be a combination of one or more of hindered phenols, hindered amines, and phosphites.

[0042] Example 1

[0043] A halogen-free flame-retardant PC composite material with a high recycling ratio and resistance to high thermal deformation comprises the following components in parts by mass: 18.5 parts of PC-1, 65 parts of PC-2, 10 parts of GF, 3 parts of flame retardant-1, 0.3 parts of flame retardant-2, 0.6 parts of color powder, 2 parts of toughening agent, 0.3 parts of anti-dripping agent, and 0.3 parts of antioxidant.

[0044] Among them, the two selected PCs are both bisphenol A linear polycarbonate, synthesized by phosgene method, and their MIs are MI(PC-1)=60g / 10min(300℃ / 1.2kg) and MI(PC-2)=(6~8)g / 10min(300℃ / 1.2kg).

[0045] Among them, GF is short-cut fiber, the surface of which is treated with special silane-type impregnation, with a diameter of 10μm and a length of 3mm. It has higher packing density and excellent dry fluidity, making the glass fiber content in the product uniform, as well as excellent mechanical properties and surface state.

[0046] Among them, the selected flame retardant-1 is a silicone-based flame retardant, and the flame retardant-2 is a sulfonate-based flame retardant. The combination of the two can achieve the flame retardant requirements and fire resistance level under ultra-thin thickness.

[0047] Among them, the color powder selected is carbon black powder, which is a light, loose and extremely fine black powder with a large surface area. It is a common pigment and filler in industrial production.

[0048] Among them, the toughening agent selected is styrene-based thermoplastic elastomer MBS, a core-shell structure toughening agent coated with MMA, which can significantly improve the impact resistance of resins and engineering plastics, and at the same time has excellent aging resistance and hydrolysis resistance.

[0049] Among them, the anti-drip agent selected is non-coated PTFE, which has the characteristics of small addition amount and significant anti-drip effect.

[0050] Among them, the antioxidant selected is a polyhedral hindered phenol type antioxidant, which has good compatibility with most polymers and has the characteristics of small addition amount and significant antioxidant and anti-yellowing effects.

[0051] The processing machine used is a twin-screw extruder, and the processing temperature is 260°C to 280°C.

[0052] When preparing the halogen-free flame-retardant PC composite material with high recycling ratio and high thermal deformation resistance, the components in corresponding weight parts are weighed according to the above ratio, and the components are evenly mixed and then melt-extruded and granulated.

[0053] Example 2

[0054] A halogen-free flame-retardant PC composite material with a high recycling ratio and resistance to high thermal deformation comprises the following components in parts by mass: 18.5 parts of PC-1, 66 parts of PC-2, 10 parts of GF, 3 parts of flame retardant-1, 0.3 parts of flame retardant-2, 0.6 parts of color powder, 1 part of toughening agent, 0.3 parts of anti-dripping agent, and 0.3 parts of antioxidant.

[0055] Among them, the two selected PCs are both bisphenol A linear polycarbonate, synthesized by phosgene method, and their MIs are MI(PC-1)=60g / 10min(300℃ / 1.2kg) and MI(PC-2)=(6~8)g / 10min(300℃ / 1.2kg).

[0056] Among them, GF is short-cut fiber, the surface of which is treated with special silane-type impregnation, with a diameter of 10μm and a length of 3mm. It has higher packing density and excellent dry fluidity, making the glass fiber content in the product uniform, as well as excellent mechanical properties and surface state.

[0057] Among them, the selected flame retardant-1 is a silicone-based flame retardant, and the flame retardant-2 is a sulfonate-based flame retardant. The combination of the two can achieve the flame retardant requirements and fire resistance level under ultra-thin thickness.

[0058] Among them, the color powder selected is carbon black powder, which is a light, loose and extremely fine black powder with a large surface area. It is a common pigment and filler in industrial production.

[0059] Among them, the toughening agent selected is styrene-based thermoplastic elastomer MBS, a core-shell structure toughening agent coated with MMA, which can significantly improve the impact resistance of resins and engineering plastics, and at the same time has excellent aging resistance and hydrolysis resistance.

[0060] Among them, the anti-drip agent selected is non-coated PTFE, which has the characteristics of small addition amount and significant anti-drip effect.

[0061] Among them, the antioxidant selected is a polyhedral hindered phenol type antioxidant, which has good compatibility with most polymers and has the characteristics of small addition amount and significant antioxidant and anti-yellowing effects.

[0062] The processing machine used is a twin-screw extruder, and the processing temperature is 260°C to 280°C.

[0063] When preparing the halogen-free flame-retardant PC composite material with high recycling ratio and high thermal deformation resistance, the components in corresponding weight parts are weighed according to the above ratio, and the components are evenly mixed and then melt-extruded and granulated.

[0064] Example 3

[0065] A halogen-free flame-retardant PC composite material with a high recycling ratio and resistance to high thermal deformation comprises the following components in parts by mass: 18.5 parts of PC-1, 67 parts of PC-2, 10 parts of GF, 3 parts of flame retardant-1, 0.3 parts of flame retardant-2, 0.6 parts of color powder, 0 parts of toughening agent, 0.3 parts of anti-dripping agent, and 0.3 parts of antioxidant.

[0066] Among them, the two selected PCs are both bisphenol A linear polycarbonate, synthesized by phosgene method, and their MIs are MI(PC-1)=60g / 10min(300℃ / 1.2kg) and MI(PC-2)=(6~8)g / 10min(300℃ / 1.2kg).

[0067] Among them, GF is short-cut fiber, the surface of which is treated with special silane-type impregnation, with a diameter of 10μm and a length of 3mm. It has higher packing density and excellent dry fluidity, making the glass fiber content in the product uniform, as well as excellent mechanical properties and surface state.

[0068] Among them, the selected flame retardant-1 is a silicone-based flame retardant, and the flame retardant-2 is a sulfonate-based flame retardant. The combination of the two can achieve the flame retardant requirements and fire resistance level under ultra-thin thickness.

[0069] Among them, the color powder selected is carbon black powder, which is a light, loose and extremely fine black powder with a large surface area. It is a common pigment and filler in industrial production.

[0070] Among them, the toughening agent selected is styrene-based thermoplastic elastomer MBS, a core-shell structure toughening agent coated with MMA, which can significantly improve the impact resistance of resins and engineering plastics, and at the same time has excellent aging resistance and hydrolysis resistance.

[0071] Among them, the anti-drip agent selected is non-coated PTFE, which has the characteristics of small addition amount and significant anti-drip effect.

[0072] Among them, the antioxidant selected is a polyhedral hindered phenol type antioxidant, which has good compatibility with most polymers and has the characteristics of small addition amount and significant antioxidant and anti-yellowing effects.

[0073] The processing machine used is a twin-screw extruder, and the processing temperature is 260°C to 280°C.

[0074] When preparing the halogen-free flame-retardant PC composite material with high recycling ratio and high thermal deformation resistance, the components in corresponding weight parts are weighed according to the above ratio, and the components are evenly mixed and then melt-extruded and granulated.

[0075] Example 4

[0076] A halogen-free flame-retardant PC composite material with a high recycling ratio and resistance to high thermal deformation comprises the following components in parts by mass: 18.5 parts of PC-1, 67.3 parts of PC-2, 10 parts of GF, 0.7 parts of flame retardant-1, 0.3 parts of flame retardant-2, 0.6 parts of color powder, 2 parts of toughening agent, 0.3 parts of anti-dripping agent, and 0.3 parts of antioxidant.

[0077] Among them, the two selected PCs are both bisphenol A linear polycarbonate, synthesized by phosgene method, and their MIs are MI(PC-1)=60g / 10min(300℃ / 1.2kg) and MI(PC-2)=(6~8)g / 10min(300℃ / 1.2kg).

[0078] Among them, GF is short-cut fiber, the surface of which is treated with special silane-type impregnation, with a diameter of 10μm and a length of 3mm. It has higher packing density and excellent dry fluidity, making the glass fiber content in the product uniform, as well as excellent mechanical properties and surface state.

[0079] Among them, the selected flame retardant-1 is a silicone-based flame retardant, and the flame retardant-2 is a sulfonate-based flame retardant. The combination of the two can achieve the flame retardant requirements and fire resistance level under ultra-thin thickness.

[0080] Among them, the color powder selected is carbon black powder, which is a light, loose and extremely fine black powder with a large surface area. It is a common pigment and filler in industrial production.

[0081] Among them, the toughening agent selected is styrene-based thermoplastic elastomer MBS, a core-shell structure toughening agent coated with MMA, which can significantly improve the impact resistance of resins and engineering plastics, and at the same time has excellent aging resistance and hydrolysis resistance.

[0082] Among them, the anti-drip agent selected is non-coated PTFE, which has the characteristics of small addition amount and significant anti-drip effect.

[0083] Among them, the antioxidant selected is a polyhedral hindered phenol type antioxidant, which has good compatibility with most polymers and has the characteristics of small addition amount and significant antioxidant and anti-yellowing effects.

[0084] The processing machine used is a twin-screw extruder, and the processing temperature is 260°C to 280°C.

[0085] When preparing the halogen-free flame-retardant PC composite material with high recycling ratio and high thermal deformation resistance, the components in corresponding weight parts are weighed according to the above ratio, and the components are evenly mixed and then melt-extruded and granulated.

[0086] Example 5

[0087] A halogen-free flame-retardant PC composite material with a high recycling ratio and high thermal deformation resistance comprises the following components in parts by mass: 18.5 parts of PC-1, 65.1 parts of PC-2, 10 parts of GF, 0.7 parts of flame retardant-1, 0.5 parts of flame retardant-2, 0.6 parts of color powder, 4 parts of toughening agent, 0.3 parts of anti-dripping agent, and 0.3 parts of antioxidant.

[0088] Among them, the two selected PCs are both bisphenol A linear polycarbonate, synthesized by phosgene method, and their MIs are MI(PC-1)=60g / 10min(300℃ / 1.2kg) and MI(PC-2)=(6~8)g / 10min(300℃ / 1.2kg).

[0089] Among them, GF is short-cut fiber, the surface of which is treated with special silane-type impregnation, with a diameter of 10μm and a length of 3mm. It has higher packing density and excellent dry fluidity, making the glass fiber content in the product uniform, as well as excellent mechanical properties and surface state.

[0090] Among them, the selected flame retardant-1 is a silicone-based flame retardant, and the flame retardant-2 is a sulfonate-based flame retardant. The combination of the two can achieve the flame retardant requirements and fire resistance level under ultra-thin thickness.

[0091] Among them, the color powder selected is carbon black powder, which is a light, loose and extremely fine black powder with a large surface area. It is a common pigment and filler in industrial production.

[0092] Among them, the toughening agent selected is styrene-based thermoplastic elastomer MBS, a core-shell structure toughening agent coated with MMA, which can significantly improve the impact resistance of resins and engineering plastics, and at the same time has excellent aging resistance and hydrolysis resistance.

[0093] Among them, the anti-drip agent selected is non-coated PTFE, which has the characteristics of small addition amount and significant anti-drip effect.

[0094] Among them, the antioxidant selected is a polyhedral hindered phenol type antioxidant, which has good compatibility with most polymers and has the characteristics of small addition amount and significant antioxidant and anti-yellowing effects.

[0095] The processing machine used is a twin-screw extruder, and the processing temperature is 260°C to 280°C.

[0096] When preparing the halogen-free flame-retardant PC composite material with high recycling ratio and high thermal deformation resistance, the components in corresponding weight parts are weighed according to the above ratio, and the components are evenly mixed and then melt-extruded and granulated.

[0097] Comparative Example 1

[0098] A halogen-free flame-retardant PC composite material with a high recycling ratio and resistance to high thermal deformation comprises the following components in parts by mass: 18.5 parts of PC-1, 65.3 parts of PC-2, 10 parts of GF, 0.7 parts of flame retardant-1, 0.3 parts of flame retardant-2, 0.6 parts of color powder, 4 parts of toughening agent, 0.3 parts of anti-dripping agent, and 0.3 parts of antioxidant.

[0099] Among them, the two selected PCs are both bisphenol A linear polycarbonate, synthesized by phosgene method, and their MIs are MI(PC-1)=60g / 10min(300℃ / 1.2kg) and MI(PC-2)=(6~8)g / 10min(300℃ / 1.2kg).

[0100] Among them, GF is short-cut fiber, the surface of which is treated with special silane-type impregnation, with a diameter of 10μm and a length of 3mm. It has higher packing density and excellent dry fluidity, making the glass fiber content in the product uniform, as well as excellent mechanical properties and surface state.

[0101] Among them, the selected flame retardant-1 is a silicone-based flame retardant, and the flame retardant-2 is a sulfonate-based flame retardant. The combination of the two can achieve the flame retardant requirements and fire resistance level under ultra-thin thickness.

[0102] Among them, the color powder selected is carbon black powder, which is a light, loose and extremely fine black powder with a large surface area. It is a common pigment and filler in industrial production.

[0103] Among them, the toughening agent selected is styrene-based thermoplastic elastomer MBS, a core-shell structure toughening agent coated with MMA, which can significantly improve the impact resistance of resins and engineering plastics, and at the same time has excellent aging resistance and hydrolysis resistance.

[0104] Among them, the anti-drip agent selected is non-coated PTFE, which has the characteristics of small addition amount and significant anti-drip effect.

[0105] Among them, the antioxidant selected is a polyhedral hindered phenol type antioxidant, which has good compatibility with most polymers and has the characteristics of small addition amount and significant antioxidant and anti-yellowing effects.

[0106] The processing machine used is a twin-screw extruder, and the processing temperature is 260°C to 280°C.

[0107] When preparing the halogen-free flame-retardant PC composite material with high recycling ratio and high thermal deformation resistance, the components in corresponding weight parts are weighed according to the above ratio, and the components are evenly mixed and then melt-extruded and granulated.

[0108] After the above embodiments and comparative examples were implemented, they were reproduced according to the same components. After melt extrusion granulation of Embodiment 1, Embodiment 2, Embodiment 3, Embodiment 4, Embodiment 5, and Comparative Example 1, the particles in each embodiment and comparative example were injection molded into standard test specimens on an injection molding machine. The mechanical properties of the obtained materials were tested according to the standards. The test results are shown in Table 1:

[0109] Table 1 Test results

[0110]

[0111]

[0112] From the test results of Example 1, Example 2, Example 3, Example 4, Example 5 and Comparative Example 1, it can be seen that the present invention uses processing aids to achieve the preparation of a halogen-free flame-retardant PC composite material with a high recovery ratio and resistance to high thermal deformation.

[0113] The beneficial effects of the present invention are:

[0114] 1. The PC used in the present invention is all recycled material, which has higher environmental performance;

[0115] 2. The material of the present invention does not contain any dangerous halogen compounds, which can reduce the risk of secondary pollution when recycled and reused, thereby reducing the impact on the environment;

[0116] 3. The material of the present invention is mainly PC, and GF filler is added to make the material have certain mechanical properties. Through experiments, it can be concluded that it has a tensile strength greater than 62MPa, a breaking elongation greater than 3.0%, a flexural strength greater than 110MPa, a flexural modulus greater than 3500Mpa, and a thermal conductivity greater than 6.5kJ / m 2 Notched impact strength, 0.8mm V-0 flame retardancy and heat deformation temperature above 130℃.

[0117] It should be pointed out that the present invention is not limited to the above-mentioned implementation modes, and any simple modifications, equivalent changes and modifications made to the above-mentioned embodiments by any technician familiar with the profession based on the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. A halogen-free flame-retardant PC composite material with high recycling ratio and high thermal deformation resistance, characterized in that: The composition comprises the following components in parts by weight: Polycarbonate (PC), 80-90 parts by mass; Glass fiber (GF), 9-19 parts by mass; Flame retardant, 0.1 to 10.1 parts by mass; Toner, 0.3-10.3 parts by weight; Toughening agent, 0 to 10 parts by mass; Anti-dripping agent, 0.3 to 10.3 parts by mass; Antioxidant, 0.3 to 10.3 parts by mass.

2. The halogen-free flame-retardant PC composite material with high recycling ratio and high thermal deformation resistance as claimed in claim 1, characterized in that: The selected polycarbonate (PC) can be one or more of bisphenol A linear polycarbonate, polyester polycarbonate, silicone copolymer polycarbonate, cyclohexane bisphenol A polycarbonate, and polycarbonate synthesized from bisphenol TMC. The melt mass flow rate MI of the polycarbonate is between (6 and 65) g / 10 min (300° C. / 1.2 kg), and the impact strength IS is between (20 and 72) kJ / m 2 , the weight average molecular weight is between 10000 and 50000, and the molecular weight distribution is between 1 and 3.

3. The halogen-free flame-retardant PC composite material with high recycling ratio and high thermal deformation resistance as claimed in claim 1, characterized in that: The selected glass fiber (GF) can be a combination of one or more of milled glass fiber with a length of 0.05 mm to 1 mm, chopped glass fiber with a length of 1 mm to 18 mm, and continuous glass fiber.

4. The halogen-free flame-retardant PC composite material with high recycling ratio and high thermal deformation resistance as claimed in claim 1, characterized in that: The flame retardant selected may be a combination of one or more of phosphate flame retardants, sulfonate flame retardants, silicone flame retardants and derivatives thereof.

5. The halogen-free flame-retardant PC composite material with high recycling ratio and high thermal deformation resistance as claimed in claim 1, characterized in that: The selected color powder can be a combination of one or more inorganic pigments and organic pigments.

6. The halogen-free flame-retardant PC composite material with high recycling ratio and high thermal deformation resistance as claimed in claim 1, characterized in that: The selected toughening agent can be a combination of one or more of core-shell acrylate-PMMA toughening agents, core-shell acrylate-SAN toughening agents, core-shell silicone-PMMA toughening agents, core-shell silicone-SAN toughening agents, cross-linked methacrylate-methyl methacrylate toughening agents, butadiene-styrene-methyl methacrylate toughening agents, silicone rubber-methyl methacrylate toughening agents and their derivatives.

7. The halogen-free flame-retardant PC composite material with high recycling ratio and high thermal deformation resistance as claimed in claim 1, characterized in that: The selected anti-dripping agent can be a fluorine-based PTFE material, including a coated PTFE anti-dripping material and a non-coated PTFE (pure powder type) material, and the PTFE content thereof is 40-100%.

8. The halogen-free flame-retardant PC composite material with high recycling ratio and high thermal deformation resistance as claimed in claim 1, characterized in that: The selected antioxidant can be a combination of one or more of hindered phenols, hindered amines, and phosphites.

9. The halogen-free flame-retardant PC composite material with high recycling ratio and high thermal deformation resistance as claimed in claim 1, characterized in that: The processing machine selected is a twin-screw extruder, and the processing temperature is 260°C to 280°C.

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