A halogen-free flame-retardant polycarbonate composition and its preparation method and application

Abstract

The present application discloses a halogen-free flame-retardant polycarbonate composition and its preparation method and application, belonging to the technical field of polymer materials. The halogen-free flame-retardant polycarbonate composition of the present application comprises the following components in parts by weight: 79 to 96 parts of polycarbonate resin, 0.05 to 1.5 parts of sulfonate flame retardant, 0.01 to 6 parts of flame retardant synergist A, and 0.02 to 0.2 parts of flame retardant synergist B; wherein, flame retardant synergist A is titanium dioxide; flame retardant synergist B is a flaky aluminum oxide with a silane coupling agent coated on the surface, and the flame time of the composition under a 500W flame burn-through is significantly improved, and its 1.6mm square plate UL94‑5V burn-through flame time is greater than 45s, which is suitable for the preparation of electronic and electrical products.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer materials, and specifically relates to a halogen-free flame-retardant polycarbonate composition and a preparation method and application thereof. Background Art

[0002] Polycarbonate has excellent properties such as high strength, high toughness, high heat resistance, good dimensional stability and electrical insulation, and has been widely used in home appliances, medical devices, electrical and electronic fields. Among them, the electrical and electronic field requires that the test sample should not be perforated after being subjected to a 500W flame for multiple times, but current polycarbonate products cannot meet this requirement, especially thin-walled products. Summary of the invention

[0003] Based on the defects of the prior art, the purpose of the present invention is to provide a halogen-free flame retardant polycarbonate composition and its preparation method and application, so as to effectively improve the flame time of polycarbonate burned through by a 500W flame, so that its 1.6mm square plate UL94-5V burning and burning through flame time is greater than 45s.

[0004] In order to achieve the above object, the present invention provides a halogen-free flame retardant polycarbonate composition, comprising the following components in parts by weight:

[0005]

[0006] Wherein, the flame retardant synergist A is titanium dioxide;

[0007] The flame retardant synergist B is flaky aluminum oxide modified by a silane coupling agent.

[0008] Under the synergistic effect of the sulfonate flame retardant, the flame retardant synergist titanium dioxide and the flaky aluminum oxide coated with a silane coupling agent, the flame time of the halogen-free flame-retardant polycarbonate composition under a 500W flame is significantly improved, and the UL94-5V burning and burning time of the 1.6mm square plate is greater than 45s. Among them, titanium dioxide can catalyze the sulfonate flame retardant to form carbon during the flame retardant process; the flaky aluminum oxide has good thermal conductivity to avoid local overheating of the material, but it can catalyze the decomposition of polycarbonate, and coating it with a silane coupling agent can prevent it from catalyzing the decomposition of polycarbonate and affecting the flame retardancy; in addition, the two flame retardant synergists can overlap the network structure, which is conducive to the synergistic flame retardant performance of the two.

[0009] Optionally, the diameter-to-thickness ratio of the flaky aluminum oxide is greater than 2, such as 2, 3, 4, 5, 6, 7, 8, 9 or 10. The diameter-to-thickness ratio of the flaky aluminum oxide is measured by the following method: after drying the sample, a photo of the sample is taken with a scanning electron microscope (SEM) at a magnification of 400-1000 times, the electron microscope photo is opened with Nano Measurer software, a scale is set, 50 samples are selected from the SEM picture of each sample, and their diameters and thicknesses are marked with the software respectively, and the software automatically generates a measurement report to obtain the average diameter-to-thickness ratio of the sample.

[0010] Preferably, the halogen-free flame retardant polycarbonate composition comprises the following components in parts by weight:

[0011] Flame retardant synergist A 2-4 parts

[0012] Flame retardant synergist B 0.05-0.15 parts. When the contents of the flame retardant synergist A and the flame retardant synergist B in the halogen-free flame retardant polycarbonate composition are within the specific range, the flame retardant synergist A and the flame retardant synergist B have better dispersibility in the polycarbonate, the flame retardant synergist B has a lower degree of decomposition of the polycarbonate, and the flame retardant synergist A has a stronger effect of catalyzing the carbonization of the sulfonate flame retardant, and the flame retardant synergist B has a stronger effect of heat conduction, so the flame time of the composition burned through by a 500W flame is longer.

[0013] Preferably, in the flame retardant synergist B, the mass of the silane coupling agent is 0.2% to 4% of the mass of the flaky aluminum oxide. More preferably, in the flame retardant synergist B, the mass of the silane coupling agent is 0.4% to 2% of the mass of the flaky aluminum oxide. When the mass of the silane coupling agent in the flame retardant synergist B is 0.2% to 4% of the mass of the flaky aluminum oxide, such as 0.2%, 0.5%, 1%, 2%, 3%, or 4%, not only can the flaky aluminum oxide be better coated to reduce the risk of PC degradation, but also the silane coupling agent can be prevented from being over-crosslinked, causing the flaky aluminum oxide to agglomerate and affect dispersion, thereby making the flame time of the composition burned through by a 500W flame longer. In particular, when the mass of the silane coupling agent in the flame retardant synergist B is 0.4% to 2% of the mass of the flaky aluminum oxide, such as 0.4%, 0.5%, 0.7%, 1%, 1.2%, 1.5%, or 2%, the combustion and burn-through flame time of a 1.6 mm square plate of the composition UL94-5V is further improved.

[0014] In the flame retardant synergist B, the mass ratio of the silane coupling agent to the flaky aluminum oxide is obtained by TGA (thermogravimetric analysis) test.

[0015] In one embodiment, the preparation method of the flame retardant synergist B comprises the following steps: dispersing flaky aluminum oxide and a silane coupling agent in a solvent, heating for reaction, standing, filtering, washing, and drying to obtain the flame retardant synergist B.

[0016] Optionally, the mass ratio of the flaky aluminum oxide to the silane coupling agent is 100:(0.5-7).

[0017] Optionally, the ratio of the volume of the solvent to the mass of the flaky aluminum oxide is (100-300) mL: 1 g.

[0018] Optionally, the solvent includes 95% (v / v) to 100% (v / v) ethanol, such as 95% (v / v) ethanol or anhydrous ethanol.

[0019] Optionally, the moisture content of the flaky aluminum oxide is less than 0.5wt.%, such as 0.5wt.%, 0.4wt.%, 0.3wt.%, 0.2wt.%, 0.1wt.% or 0. During the preparation of the flame retardant synergist B, the flaky aluminum oxide can utilize the moisture it carries, absorb moisture in the air and / or moisture in the solvent, and participate in the reaction. Optionally, the temperature of the heating reaction is 50-70°C; the time of the heating reaction is 1-3h.

[0020] Optionally, the detergent used for washing includes anhydrous ethanol.

[0021] Preferably, the particle size D50 of the flame retardant synergist B is 4 to 16 μm. More preferably, the particle size D50 of the flame retardant synergist B is 5 to 11 μm.

[0022] When the particle size D50 of the flame retardant synergist B is 4 to 16 μm, such as 4 μm, 6 μm, 8 μm, 10 μm, 12 μm, 14 μm, or 16 μm, it is easy to overlap the network structure with the flame retardant synergist A, so that the flame retardancy of the composition is better. In particular, when the particle size D50 of the flame retardant synergist B is 5 to 11 μm, such as 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, or 11 μm, the flame retardancy of the composition is further improved.

[0023] Preferably, the particle size D50 of the flame retardant synergist A is 80-600 nm. More preferably, the particle size D50 of the flame retardant synergist A is 170-230 nm.

[0024] When the particle size D50 of the flame retardant synergist A is 80-600 nm, such as 80 nm, 100 nm, 150 nm, 180 nm, 200 nm, 220 nm, 250 nm, 300 nm, 400 nm, 500 nm, or 600 nm, it is easy to overlap the network structure with the flame retardant synergist B, so that the flame retardancy of the composition is better. In particular, when the particle size D50 of the flame retardant synergist A is 170-230 nm, such as 170 nm, 180 nm, 190 nm, 200 nm, 210 nm, 220 nm, or 230 nm, the flame retardancy of the composition is further improved.

[0025] The particle size D50 of the flame retardant synergists A and B is measured according to the particle size distribution laser diffraction method of GBT19077-2016.

[0026] Preferably, the silane coupling agent includes at least one of bis-[γ-(triethoxysilyl)propyl]tetrasulfide, γ-aminopropyltriethoxysilane, γ-glycidyloxypropyltrimethoxysilane or γ-methacryloxypropyltrimethoxysilane.

[0027] Preferably, the sulfonate flame retardant includes at least one of potassium perfluorobutylsulfonate and potassium 3-phenylsulfonylbenzenesulfonate.

[0028] Preferably, the following components in parts by weight are also included:

[0029] 0.01-0.2 parts of anti-dripping agent, and / or

[0030] Processing aids 0.01 to 5 parts.

[0031] Preferably, the anti-drip agent comprises polytetrafluoroethylene.

[0032] Preferably, the processing aid includes at least one of an antioxidant and a lubricant.

[0033] As an example, the antioxidant includes at least one of antioxidant 1010 , antioxidant 168 , and antioxidant 1076 .

[0034] As an example, the lubricant includes at least one of pentaerythritol stearate, polyethylene wax, or silicone lubricant.

[0035] Preferably, the polycarbonate resin has a melt flow rate of 2 to 21 g / 10 min at 300° C. and 1.2 kg load. The melt flow rate of the polycarbonate resin can be measured according to ISO 1133-1:2011.

[0036] In one embodiment, the weight percentage of the polycarbonate resin in the halogen-free flame retardant polycarbonate composition is greater than 85%, such as 85%, 88%, 90%, 95%, or 99.4%.

[0037] The present application also provides a method for preparing the halogen-free flame-retardant polycarbonate composition, comprising the following steps:

[0038] Mix and disperse all the raw materials to obtain a premix;

[0039] The premix is ​​added into an extruder for melt extrusion and granulation to obtain the halogen-free flame-retardant polycarbonate composition.

[0040] Optionally, the extruder is a twin-screw extruder.

[0041] Optionally, the screw aspect ratio is 35 to 65:1.

[0042] Optionally, the barrel temperature is 210-250°C.

[0043] Optionally, the screw speed is 200-800 rpm.

[0044] The present application also provides the use of the halogen-free flame-retardant polycarbonate composition in electronic and electrical products, such as sockets, switch panels, etc.

[0045] Compared with the prior art, the beneficial effect of the present application is that the present application adds a sulfonate flame retardant and flame retardant synergists titanium dioxide and flaky aluminum oxide to the polycarbonate resin, and coats the surface of the flaky aluminum oxide with a silane coupling agent to significantly improve the flame time of the 500W flame burn-through, so that the 1.6mm square plate UL94-5V burn-through flame time is greater than 45s, which is suitable for the preparation of electronic and electrical products. DETAILED DESCRIPTION

[0046] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments and comparative examples, the purpose of which is to understand the content of the present invention in detail, rather than to limit the present invention. All other embodiments obtained by those of ordinary skill in the art without making creative work premise belong to the protection scope of the present invention. The experimental reagents and instruments involved in the implementation of the present invention, unless otherwise specified, are all commonly used common reagents and instruments.

[0047] Examples and Comparative Examples

[0048] Each embodiment and comparative example provides a halogen-free flame retardant polycarbonate composition. The compositions of these compositions are shown in Tables 1 to 2, and the preparation method comprises the following steps:

[0049] Mix and disperse all the raw materials to obtain a premix;

[0050] The obtained premix is ​​fed from the main feed port of a twin-screw extruder, melt-mixed and extruded into granules in the twin-screw extruder to obtain a halogen-free flame-retardant polycarbonate composition, wherein the screw aspect ratio is 45:1, the barrel temperature is 210-250° C., and the screw speed is 550 rpm. Unless otherwise specified, the steps and process parameters used in the preparation methods of the embodiments and comparative examples are the same.

[0051] The component information used in the above embodiments and comparative examples is as follows:

[0052] Polycarbonate resin 1: melt flow rate 3 g / 10 min, PC 1300-03NP, LG Chemical;

[0053] Polycarbonate resin 2: melt flow rate 10 g / 10 min, PC 1300-10NP, LG Chem;

[0054] Polycarbonate resin 3: melt flow rate 22 g / 10 min, PC 1300-22NP, LG Chem;

[0055] Sulfonate flame retardant 1: potassium perfluorobutanesulfonate, commercially available;

[0056] Sulfonate flame retardant 2: potassium 3-phenylsulfonylbenzenesulfonate, commercially available;

[0057] Flame retardant synergist A1: titanium dioxide, particle size D50 is 500nm, model TiO2-JH-500, Yumu (Ningbo) New Materials;

[0058] Flame retardant synergist A2: titanium dioxide, with a particle size D50 of 220 nm, obtained by grinding and sieving the flame retardant synergist A1;

[0059] Flame retardant synergist A3: titanium dioxide, with a particle size D50 of 200 nm, obtained by grinding and sieving the flame retardant synergist A1;

[0060] Flame retardant synergist A4: titanium dioxide, with a particle size D50 of 180 nm, obtained by grinding and sieving the flame retardant synergist A1;

[0061] Flame retardant synergist A5: titanium dioxide, with a particle size D50 of 100 nm, obtained by grinding and sieving the flame retardant synergist A1;

[0062] Flame retardant synergist B1: flaky alumina coated with a silane coupling agent, with a particle size D50 of 8 μm, and the mass of the silane coupling agent contained is 0.3% of the mass of the flaky alumina contained, and the silane coupling agent contained is bis-[γ-(triethoxysilyl)propyl] tetrasulfide, which is homemade, and the preparation method is as follows: flaky alumina (particle size D50 is 8 μm, CA12, Henan Sicheng Grinding Technology Co., Ltd.) and the silane coupling agent are ultrasonically dispersed in 95% (v / v) ethanol, wherein the mass of the silane coupling agent is 0.61% of the mass of the flaky alumina, and the ratio of the volume of 95% (v / v) ethanol to the mass of the flaky alumina is 100 mL: 1 g, and then the reaction is continuously stirred at 60°C for 2 h, and then the mixture is allowed to stand, filtered, washed twice with anhydrous ethanol, and dried to obtain the flame retardant synergist B1;

[0063] Flame retardant synergist B2: flaky aluminum oxide coated with a silane coupling agent, with a particle size D50 of 8 μm, and the mass of the silane coupling agent contained is 0.5% of the mass of the flaky aluminum oxide contained, and the silane coupling agent contained is bis-[γ-(triethoxysilyl)propyl]tetrasulfide, which is homemade. The preparation method is different from that of flame retardant synergist B1 in that the mass of the silane coupling agent used is 1.03% of the mass of the flaky aluminum oxide;

[0064] Flame retardant synergist B3: flaky aluminum oxide coated with a silane coupling agent, with a particle size D50 of 8 μm, and the mass of the silane coupling agent contained is 1% of the mass of the flaky aluminum oxide contained, and the silane coupling agent contained is bis-[γ-(triethoxysilyl)propyl]tetrasulfide, which is homemade. The preparation method is different from that of the flame retardant synergist B1 in that the mass of the silane coupling agent used is 2.10% of the mass of the flaky aluminum oxide;

[0065] Flame retardant synergist B4: flaky aluminum oxide coated with a silane coupling agent, with a particle size D50 of 8 μm, and the mass of the silane coupling agent contained is 1.5% of the mass of the flaky aluminum oxide contained, and the silane coupling agent contained is bis-[γ-(triethoxysilyl)propyl]tetrasulfide, which is homemade. The preparation method is different from that of the flame retardant synergist B1 in that the mass of the silane coupling agent used is 3.32% of the mass of the flaky aluminum oxide;

[0066] Flame retardant synergist B5: flaky aluminum oxide coated with a silane coupling agent, with a particle size D50 of 8 μm, and the mass of the silane coupling agent contained is 3% of the mass of the flaky aluminum oxide contained, and the silane coupling agent contained is bis-[γ-(triethoxysilyl)propyl]tetrasulfide, which is homemade. The preparation method is different from that of flame retardant synergist B1 in that the mass of the silane coupling agent used is 6.81% of the mass of the flaky aluminum oxide;

[0067] Flame retardant synergist B6: flaky aluminum oxide coated with a silane coupling agent, with a particle size D50 of 4.5 μm, and the mass of the silane coupling agent contained is 1% of the mass of the flaky aluminum oxide contained, and the silane coupling agent contained is bis-[γ-(triethoxysilyl)propyl]tetrasulfide, which is homemade. The preparation method is different from that of flame retardant synergist B3 in that the flaky aluminum oxide used is CA05 produced by Henan Sicheng Grinding Technology Co., Ltd., with a particle size D50 of 4.5 μm;

[0068] Flame retardant synergist B7: flaky aluminum oxide coated with a silane coupling agent, with a particle size D50 of 6 μm, and the mass of the silane coupling agent contained is 1% of the mass of the flaky aluminum oxide contained, and the silane coupling agent contained is bis-[γ-(triethoxysilyl)propyl]tetrasulfide, which is homemade. The preparation method is different from that of flame retardant synergist B3 in that the flaky aluminum oxide used is CA09 produced by Henan Sicheng Grinding Technology Co., Ltd., with a particle size D50 of 6 μm;

[0069] Flame retardant synergist B8: flaky aluminum oxide coated with a silane coupling agent, with a particle size D50 of 10 μm, and the mass of the silane coupling agent contained is 1% of the mass of the flaky aluminum oxide contained, and the silane coupling agent contained is bis-[γ-(triethoxysilyl)propyl]tetrasulfide, which is homemade. The preparation method is different from that of flame retardant synergist B3 in that the flaky aluminum oxide used is CA15 produced by Henan Sicheng Grinding Technology Co., Ltd., and the particle size D50 is 10 μm;

[0070] Flame retardant synergist B9: flaky aluminum oxide coated with a silane coupling agent, with a particle size D50 of 15 μm, and the mass of the silane coupling agent contained is 1% of the mass of the flaky aluminum oxide contained, and the silane coupling agent contained is bis-[γ-(triethoxysilyl)propyl]tetrasulfide, which is homemade. The preparation method is different from that of flame retardant synergist B3 in that the flaky aluminum oxide used is CA20 produced by Henan Sicheng Grinding Technology Co., Ltd., with a particle size D50 of 15 μm;

[0071] Flame retardant synergist B10: flaky aluminum oxide coated with a silane coupling agent, with a particle size D50 of 8 μm, and the mass of the silane coupling agent contained is 1% of the mass of the flaky aluminum oxide contained, and the silane coupling agent contained is γ-aminopropyltriethoxysilane, which is homemade. The preparation method is different from that of the flame retardant synergist B3 in that the silane coupling agent used is different;

[0072] Flame retardant synergist B11: flaky aluminum oxide coated with a silane coupling agent, with a particle size D50 of 8 μm, and the mass of the silane coupling agent contained is 1% of the mass of the flaky aluminum oxide contained, and the silane coupling agent contained is γ-glycidyloxypropyltrimethoxysilane, which is homemade. The preparation method is different from that of the flame retardant synergist B1 in that the silane coupling agent used is different;

[0073] Flame retardant synergist B12: flaky aluminum oxide coated with a silane coupling agent, with a particle size D50 of 8 μm, and the mass of the silane coupling agent contained is 1% of the mass of the flaky aluminum oxide contained, and the silane coupling agent contained is γ-methacryloxypropyltrimethoxysilane, which is homemade. The preparation method is different from that of the flame retardant synergist B1 in that the silane coupling agent used is different;

[0074] Flame retardant synergist B13: flake aluminum oxide, not treated with silane coupling agent, particle size D50 is 8 μm, CA12, Henan Sicheng Grinding Technology Co., Ltd.;

[0075] Titanate coupling agent B14: flaky aluminum oxide coated with a titanate coupling agent, with a particle size D50 of 8 μm, and a mass of the contained titanate coupling agent of 1% of the mass of the contained flaky aluminum oxide, and the contained titanate coupling agent is isopropyl triisostearate titanate, which is homemade. The preparation method is different from that of the flame retardant synergist B3 in that the coupling agent used is different;

[0076] Flame retardant synergist B15: spherical alumina coated with a silane coupling agent, with a particle size D50 of 5 μm, and the mass of the silane coupling agent contained is 1% of the mass of the spherical alumina contained, and the silane coupling agent contained is bis-[γ-(triethoxysilyl)propyl] tetrasulfide, which is homemade, and the preparation method is as follows: spherical alumina (particle size D50 is 5 μm, B-Al2O3-5W, Baijiaer New Materials) and the silane coupling agent are ultrasonically dispersed in 95% (v / v) ethanol, wherein the mass of the silane coupling agent is 2.1% of the mass of the spherical alumina, and the ratio of the volume of 95% (v / v) ethanol to the mass of the spherical alumina is 100:1, and then continuously stirred and reacted at 60°C for 2 hours, then allowed to stand, filtered and washed twice with anhydrous ethanol, and dried to obtain flame retardant synergist B14;

[0077] Anti-drip agent: polytetrafluoroethylene, commercially available;

[0078] Processing aid: Antioxidant 1010, commercially available.

[0079] The melt flow rate of each of the above polycarbonate resins is measured according to ISO 1133-1:2011, and the test conditions are as follows: 300° C., 1.2 kg load.

[0080] Unless otherwise specified, the components and raw materials used in the examples and comparative examples of the present application are of the same type.

[0081] The halogen-free flame-retardant polycarbonate compositions obtained in each embodiment and comparative example were subjected to the following performance tests: the samples were injection molded into 100 mm*100 mm*1.6 mm square plates, and the flammability test was performed according to the "Flammability Test of Plastic Materials, UL94-2019" regulations. The square plate passed the 5V combustion and burning time> 45s. The test results are shown in Tables 1 and 2.

[0082] Table 1

[0083]

[0084] Table 2

[0085]

[0086] It can be seen from Table 4 that the halogen-free flame-retardant polycarbonate composition obtained in each embodiment of the present application meets the UL94-5V test for a 1.6 mm square plate and does not burn through within 45 seconds.

[0087] Comparative Examples 1 and 2 lack one of the flame retardant synergists A and B, resulting in a shorter burning and burning time of the square plate 5V.

[0088] In Comparative Example 3, since the flaky aluminum oxide in the flame retardant synergist B used was not coated with a silane coupling agent, the PC decomposition degree was high, resulting in poor flame retardancy.

[0089] In Comparative Example 4, since the coupling agent for coating the flaky aluminum oxide is a titanate coupling agent, the coating effect is poor, the degree of PC decomposition is high, and the flame retardancy of the composition is poor.

[0090] In Comparative Example 5, the flame retardant synergist B used has spherical aluminum oxide, which has poor heat transfer effect and leads to poor flame retardancy.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A halogen-free flame-retardant polycarbonate composition, characterized in that: The composition comprises the following components in parts by weight: Wherein, the flame retardant synergist A is titanium dioxide; The flame retardant synergist B is flaky aluminum oxide with a silane coupling agent coated on the surface.

2. The halogen-free flame-retardant polycarbonate composition according to claim 1, characterized in that: The composition comprises the following components in parts by weight: Flame retardant synergist A 2-4 parts Flame retardant synergist B 0.05-0.15 parts.

3. The halogen-free flame-retardant polycarbonate composition according to claim 1, characterized in that: In the flame retardant synergist B, the mass of the silane coupling agent is 0.2% to 4% of the mass of the flaky aluminum oxide.

4. The halogen-free flame-retardant polycarbonate composition according to claim 3, characterized in that: In the flame retardant synergist B, the mass of the silane coupling agent is 0.4% to 2% of the mass of the flaky aluminum oxide.

5. The halogen-free flame-retardant polycarbonate composition according to claim 1, characterized in that: The particle size D50 of the flame retardant synergist B is 4 to 16 μm.

6. The halogen-free flame-retardant polycarbonate composition according to claim 5, characterized in that: The particle size D50 of the flame retardant synergist B is 5 to 11 μm.

7. The halogen-free flame-retardant polycarbonate composition according to claim 1, characterized in that: The particle size D50 of the flame retardant synergist A is 80-600 nm.

8. The halogen-free flame-retardant polycarbonate composition according to claim 7, characterized in that: The particle size D50 of the flame retardant synergist A is 170-230 nm.

9. The halogen-free flame-retardant polycarbonate composition according to claim 1, characterized in that: The silane coupling agent includes at least one of bis-[γ-(triethoxysilyl)propyl]tetrasulfide, γ-aminopropyltriethoxysilane, γ-glycidyloxypropyltrimethoxysilane or γ-methacryloxypropyltrimethoxysilane.

10. The halogen-free flame-retardant polycarbonate composition according to claim 1, characterized in that: The sulfonate flame retardant includes at least one of potassium perfluorobutylsulfonate and potassium 3-phenylsulfonylbenzenesulfonate.

11. The halogen-free flame-retardant polycarbonate composition according to claim 1, characterized in that: Satisfies at least one of the following characteristics: (1) also includes the following components in parts by weight: 0.01-0.2 parts of anti-dripping agent, and / or Processing aids 0.01 to 5 parts; (2) The polycarbonate resin has a melt flow rate of 2 to 21 g / 10 min at 300° C. and 1.2 kg load.

12. A method for preparing the halogen-free flame-retardant polycarbonate composition according to any one of claims 1 to 11, characterized in that: The following steps are involved: Mix and disperse all the raw materials to obtain a premix; The premix is ​​added into an extruder for melt extrusion and granulation to obtain the halogen-free flame-retardant polycarbonate composition.

13. Use of the halogen-free flame-retardant polycarbonate composition according to any one of claims 1 to 11 in electronic and electrical products.

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