Polycarbonate alloy materials, and methods for preparing and using same

Abstract

The present invention relates to a polycarbonate alloy material, its preparation method, and its use. The polycarbonate alloy material contains 10 to 99.9 parts by weight of polycarbonate resin, 5 to 50 parts by weight of styrene-based resin, 0.05 to 2 parts by weight of modified metal hydroxide, 1 to 30 parts by weight of toughener, and 0.01 to 2 parts by weight of stabilizer. The modified metal hydroxide is a metal hydroxide surface-treated with dimethylsiloxane and / or methylphenylsiloxane, and the styrene-based resin is at least one of styrene-acrylonitrile copolymer and styrene-butadiene-styrene copolymer. The polycarbonate alloy material has a slow burning rate and good mechanical properties and appearance, making it suitable for wide use in fields such as electronics and electrical engineering, transportation, home appliances, and aerospace.

Description

[Technical Field]

[0001] The present invention relates to the field of engineering plastics, and more particularly to polycarbonate alloy materials, as well as methods for their preparation and use. [Background technology]

[0002] With the development of the economy and society, concerns about safety risks are growing in various industries, especially in the electronics and electrical, transportation, home appliances, power tools, construction, and aerospace industries, where the demand for safety in the use of materials is increasing. For non-flame-retardant plastics, slowing the burning rate in a fire environment can effectively prevent safety risks. Currently, technical research on flame-retardant systems is increasing, but technical research on non-flame-retardant systems is still scarce.

[0003] Polycarbonate alloys are a classic alloy with a wide range of applications. To meet the needs of technological updates and changes in the application of this material, increasing attention is being paid to its safety, especially in various application environments. Currently, flame-retardant PC / ABS alloys have attracted considerable attention for their improved flame-retardant efficiency, thin-wall flame retardancy, and low smoke and heat generation. However, in actual applications, the proportion of non-flame-retardant polycarbonate alloys remains relatively high. Patent CN112375362A provides a PC / ABS composition but does not focus on the burning rate of non-flame-retardant PC / ABS alloys. When non-flame-retardant polycarbonate alloys come into contact with flames, their burning rate poses a significant safety risk, especially in thin-wall applications. Therefore, technological research is needed to slow the burning rate of non-flame-retardant polycarbonate alloys. Summary of the Invention [Problem to be solved by the invention]

[0004] The main object of the present invention is to solve the problem that there is still little research on conventional non-flame retardant polycarbonate alloys, and to provide a polycarbonate alloy material.

[0005] A further object of the present invention is to provide a method for preparing the above polycarbonate alloy material.

[0006] A further object of the present invention is to provide a use of the above polycarbonate alloy material in the manufacture of parts for electronic and electrical products, communication products or automobiles as means of transportation. [Means for solving the problem]

[0007] The above object of the present invention is achieved by the following technical solutions.

[0008] A polycarbonate alloy material, As ingredients, 10 to 99.9 parts by weight of polycarbonate resin; 5 to 50 parts by weight of a styrene-based resin; 0.05 to 2 parts by weight of a modified metal hydroxide; 1 to 30 parts by weight of a toughener; and 0.01 to 2 parts by weight of a stabilizer, the modified metal hydroxide is a metal hydroxide surface-treated with dimethylsiloxane and / or methylphenylsiloxane; The styrene-based resin is at least one of a styrene-acrylonitrile copolymer and an acrylonitrile-butadiene-styrene copolymer.

[0009] Metal hydroxides (such as magnesium hydroxide) are commonly used as flame retardant synergists and are often used in combination with flame retardants to improve the flame retardancy of materials.

[0010] The present inventors have found that adding a metal hydroxide directly to a non-flame retardant polycarbonate alloy (without adding a flame retardant) does not slow the burning rate of the polycarbonate alloy. This is thought to be because the alkalinity of the metal hydroxide causes the metal hydroxide resin to decompose, resulting in a rapid decrease in molecular weight, which increases the burning rate and also reduces the mechanical properties of the polycarbonate alloy.

[0011] As a result of repeated research, the inventors have found that by treating a metal hydroxide with dimethylsiloxane and / or methylphenylsiloxane to obtain a modified metal hydroxide and adding this modified metal hydroxide to a polycarbonate alloy material (including a polycarbonate resin / styrene-acrylonitrile copolymer alloy material, a polycarbonate resin / acrylonitrile-butadiene-styrene copolymer alloy material, or a polycarbonate resin / styrene-acrylonitrile copolymer / acrylonitrile-butadiene-styrene copolymer alloy material), the burning rate of the polycarbonate alloy material can be effectively slowed and the polycarbonate alloy material can maintain good mechanical properties (impact strength) and appearance. The reason for this is that by surface-treating the metal hydroxide with dimethylsiloxane and / or methylphenylsiloxane, the alkali metal oxides produced by the decomposition of the metal hydroxide during combustion can better promote the FRIES rearrangement in the polycarbonate resin, further accelerating the rate of carbon formation, further increasing the amount of carbon formed, and building a stronger combustion skeleton, thereby effectively slowing the combustion rate of the polycarbonate alloy material. Meanwhile, the dimethylsiloxane and / or methylphenylsiloxane form a dense coating layer, significantly improving the dispersion of the metal hydroxide in the resin matrix, ensuring a better synergistic flame retardant effect while reducing the amount used, minimizing the destructive effect of the filler on the polycarbonate resin, and allowing the polycarbonate alloy material to maintain relatively good mechanical properties and appearance. Furthermore, the introduction of silicon into the system achieves a synergistic effect with the metal hydroxide, stabilizing the combustion state and further slowing the combustion rate. Furthermore, the moisture generated by the decomposition of the modified metal hydroxide can reduce the heat of the polycarbonate alloy material and further slow down the burning rate, meeting the UL94 standard requirement of a burning rate of ≦75 mm / min.

[0012] That is, the polycarbonate alloy material of the present invention has a slow burning rate, good mechanical properties and good appearance, and can be widely used in fields such as electronics and electricity, communications, and automobile transportation.

[0013] Preferably, the polycarbonate alloy material comprises, as components: 20 to 85 parts by weight of polycarbonate resin; 10 to 45 parts by weight of a styrene-based resin; 0.1 to 1.5 parts by weight of a modified metal hydroxide; 5 to 25 parts by weight of a toughener; and 0.05 to 1.2 parts by weight of a stabilizer.

[0014] Preferably, the modified metal hydroxide is a metal hydroxide that has been surface-treated with dimethylsiloxane.

[0015] Preferably, the styrene-based resin is a styrene-acrylonitrile copolymer.

[0016] Styrene-acrylonitrile copolymers do not contain butadiene rubber (as opposed to acrylonitrile-butadiene-styrene copolymers), which can result in a slower burn rate for polycarbonate alloy materials.

[0017] More preferably, the acrylonitrile content in the styrene-acrylonitrile copolymer is 28 to 40 wt %.

[0018] Within this range of acrylonitrile content, the compatibility between styrene-acrylonitrile copolymer and polycarbonate resin is better, which is more favorable for the formation of a burning skeleton, and the burning rate of the polycarbonate alloy material is slower.

[0019] Preferably, the content of silicon element in the modified metal hydroxide is 1 to 6 wt %.

[0020] Preferably, the polycarbonate resin is a virgin polycarbonate resin and / or a recycled polycarbonate resin.

[0021] Virgin polycarbonate resin should be understood to refer to polycarbonate resin that is used as it is after polymerization without injection molding or use.Recycled polycarbonate resin refers to recycled material obtained by separating and recovering discarded polycarbonate resin according to conventional physical recycling processing methods in the field.

[0022] More preferably, the number average molecular weight of the virgin polycarbonate resin is 22,000 to 30,000.

[0023] More preferably, the recycled polycarbonate resin has a number average molecular weight of 20,000 to 25,000, a terminal hydroxy content of 72 to 372 ppm, and a BPA content of 18 to 133 ppm.

[0024] The terminal hydroxyl content of the recycled polycarbonate resin was measured in accordance with HG / T 2709-1995 standard, and the BPA content was measured in accordance with GB / T 32889-2016 standard.

[0025] The polycarbonate resin of the polycarbonate alloy material of the present invention may be a recycled polycarbonate resin, and in this case too, it is possible to achieve a relatively slow burning rate of the polycarbonate alloy material.

[0026] In the present invention, toughening agents and stabilizers commonly used in the art can be used.

[0027] Preferably, the toughener is a core-shell toughener, the core of which includes, but is not limited to, silicone rubber, polybutadiene, etc., and the shell includes, but is not limited to, acrylate, etc.

[0028] More preferably, in the toughener having a core-shell structure, the core is made of silicone rubber and the shell is made of an acrylate resin.

[0029] More preferably, in the toughener having a core-shell structure, the core is made of silicone rubber, the shell is made of an acrylate resin, and the content of silicone rubber is 6 to 60 wt %.

[0030] Preferably, the metal hydroxide is at least one of magnesium hydroxide, aluminum hydroxide, or calcium hydroxide.

[0031] Preferably, the modified metal hydroxide is prepared as follows: a metal oxide and dimethylsiloxane and / or methylphenylsiloxane are weighed out in a mass ratio of 1:(0.05-0.6), all of which are added to a powder coating device and mixed for 2-30 minutes to obtain the modified metal hydroxide.

[0032] Preferably, the stabilizer is a hindered phenolic antioxidant, including, but not limited to, hindered phenolic antioxidants 1024, 3114, 1010, 1076, and the like.

[0033] Preferably, the polycarbonate alloy material may further contain 0.01 to 5 parts of other auxiliary agents.

[0034] More preferably, the other auxiliary agent is at least one of a lubricant and a coloring material.

[0035] Optionally, the lubricant is at least one of stearic acid, stearate, or silicone.

[0036] Optionally, the colorant is at least one of carbon black, anthraquinone, or titanium yellow.

[0037] The method for preparing the polycarbonate alloy material includes the steps of mixing each component, melting, extruding and granulating to obtain the polycarbonate alloy material.

[0038] Preferably, the preparation method includes the steps of mixing the components by stirring in a high-speed mixer, and then melting, extruding and granulating them in a twin-screw extruder to obtain a polycarbonate alloy composition.

[0039] More preferably, the rotation speed of the stirring and mixing is 20 to 100 rpm, the aspect ratio of the twin-screw extruder is 32 to 60:1, the barrel temperature is 220 to 260°C, and the screw rotation speed is 200 to 900 rpm.

[0040] The use of the above polycarbonate alloy materials in the manufacture of electronic and electrical products, communication products, or means of transportation such as automobiles is also included in the scope of protection of the present invention.

[0041] Preferably, the electronic or electrical product is an electronic stand, a socket, or a charger.

[0042] Preferably, the communication product is a mobile phone case, a tablet terminal, or a portable computer.

[0043] Preferably, the parts of an automobile as a means of transportation are interior parts, exterior parts, or battery peripheral parts. [Effects of the Invention]

[0044] The present invention has the following advantageous effects compared to the prior art. The polycarbonate alloy material of the present invention has a slow burning rate (burning rate≦75 mm / min) and good mechanical properties (impact strength>30 KJ / m 2 , low temperature impact strength >13KJ / m 2 ) and appearance (class B or above), it can be widely used in fields such as electronics and electricity, transportation, home appliances, aerospace, etc. DETAILED DESCRIPTION OF THE INVENTION

[0045] In order to more clearly and completely explain the technical solutions of the present invention, the present invention will be described in more detail below using specific examples. However, it should be understood that the specific examples described here are for the purpose of illustrating the present invention, and are not intended to limit the present invention, and various modifications are possible within the limited scope of the rights of the present invention.

[0046] Some of the reagents used in the examples and comparative examples of the present invention are listed below. Polycarbonate resin (virgin) 1#: LX1603, manufactured by Rosai Chemical Co., Ltd., number average molecular weight 30,000 Polycarbonate resin (virgin) 2#: LX1609, manufactured by Rosai Chemical Co., Ltd., number average molecular weight 27,100 Polycarbonate resin (virgin) 3#: LX1920, manufactured by Rosai Chemical Co., Ltd., number average molecular weight 22,000 Polycarbonate resin (virgin) 4#: FN1500, manufactured by Idemitsu Co., Ltd., number average molecular weight 16,000 Polycarbonate resin (recycled) 1#: PCTJ-20A, manufactured by Tenko Co., Ltd., plate material derived from PCR, number average molecular weight 20,000, terminal hydroxyl content 372 ppm, BPA content 133 ppm Polycarbonate resin (recycled) 2#: PCASL-06, manufactured by AOIS, derived from PCR for buckets, number average molecular weight 25,000, terminal hydroxyl content 72 ppm, BPA content 18 ppm Styrene-based resin 1#: styrene-acrylonitrile copolymer, SAN310, manufactured by Kumho Co., Ltd., Korea, acrylonitrile content 18 wt% Styrene-based resin 2#: styrene-acrylonitrile copolymer, SAN2200, manufactured by Taiwan Chemical Fiber Co., Ltd., acrylonitrile content 28 wt% Styrene-based resin 3#: styrene-acrylonitrile copolymer, SAN3400, manufactured by Taiwan Chemical Fiber Co., Ltd., acrylonitrile content 32 wt% Styrene-based resin 4#: styrene-acrylonitrile copolymer, SAN CN40, manufactured by INEOS Styrolution, acrylonitrile content 40 wt% Styrene-based resin 5#: styrene-butadiene-styrene copolymer, PA 757, acrylonitrile content 28wt% Toughener 1#: Core-shell toughener with silicone rubber as the core and acrylate as the shell, S-2001, manufactured by Mitsubishi Chemical Corporation, silicone rubber content 6 wt% Toughener 2#: Core-shell toughener with silicone rubber as the core and acrylate as the shell, S-2030, manufactured by Mitsubishi Chemical Corporation, silicone rubber content 30 wt% Toughener 3#: Core-shell type toughener with silicone rubber as the core and acrylate as the shell, SX-005, manufactured by Mitsubishi Chemical Corporation, silicone rubber content 60 wt% Toughener 4#: Core-shell toughener with silicone rubber as the core and acrylate as the shell, LP8825, silicone rubber content 82wt% Toughener 5#: Core-shell type toughener with polybutadiene as the core and acrylate as the shell, M521, manufactured by Kanegafuchi Co., Ltd., Japan Toughener 6#: Non-core-shell type toughener, MR-01, manufactured by Kanegafuchi Co., Ltd. Stabilizer: Antioxidant 1076, commercially available Other auxiliaries: Lubricant PETS, commercially available Metal hydroxide 1#: Magnesium hydroxide, commercially available Metal hydroxide 2#: Aluminum hydroxide, commercially available Dimethylsiloxane: 360 MED FLUID, 12500 cst, manufactured by The Dow Chemical Company, USA Methylphenylsiloxane: IOTA252, 7800cst, manufactured by Anhui Iyo Co., Ltd. The process for preparing modified metal hydroxides is as follows: Weigh out the metal oxide and dimethylsiloxane or methylphenylsiloxane according to a specific ratio, add them all to a powder coating machine, and set the mixing time in the powder coating machine to 2 to 30 minutes to obtain modified metal hydroxides with various dimethylsiloxane contents. The details are as follows: Modified metal hydroxide 1#: The metal hydroxide is magnesium hydroxide, the amount of dimethylsiloxane added is 10% of the mass of the metal hydroxide, the mixing time is 23 minutes, and the silicon content of the obtained modified metal hydroxide is 3 wt%. Modified metal hydroxide 2#: The metal hydroxide is magnesium hydroxide, the amount of dimethylsiloxane added is 10% of the mass of the metal hydroxide, the mixing time is 30 minutes, and the silicon content of the obtained modified metal hydroxide is 6 wt%. Modified metal hydroxide 3#: The metal hydroxide is magnesium hydroxide, the amount of dimethylsiloxane added is 10% of the mass of the metal hydroxide, the mixing time is 12 minutes, and the silicon content of the obtained modified metal hydroxide is 1 wt%. Modified metal hydroxide 4#: The metal hydroxide is magnesium hydroxide, the amount of dimethylsiloxane added is 10% of the mass of the metal hydroxide, the mixing time is 2 minutes, and the silicon content of the obtained modified metal hydroxide is 0.5 wt%. Modified metal hydroxide 5#: The metal hydroxide is aluminum hydroxide, the amount of dimethylsiloxane added is 10% of the mass of the metal hydroxide, the mixing time is 23 minutes, and the silicon content of the obtained modified metal hydroxide is 3 wt%. Modified metal hydroxide 6#: The metal hydroxide is magnesium hydroxide, the amount of methylphenylsiloxane added is 10% of the mass of the metal hydroxide, the mixing time is 23 minutes, and the silicon content of the obtained modified metal hydroxide is 2.8 wt%.

[0047] Unless otherwise specified, all of the components (eg, stabilizers, other additives) used in each parallel example and comparative example are the same commercially available products.

[0048] The properties of the polycarbonate alloy materials provided in the examples and comparative examples of the present invention are measured according to the following test methods.

[0049] Flame rate: Flame tests were conducted in accordance with the "Flammability Test for Plastic Materials, UL94-2018" standard. Flame retardancy ratings were determined based on the burning rate, extinguishing time, drip resistance, and whether or not the material burned during dripping. The test samples were 125 mm long and 13 mm wide. The thickness of the test sample was 0.8 mm. According to UL94, the flame retardancy rating of a material can be classified as follows (UL94-HB). The burning rate (mm / min) at this thickness was calculated; the higher the burning rate, the faster the flame propagation speed, and conversely, the slower the flame propagation speed.

[0050] Impact strength: The 3.0 mm IZOD impact strength was tested according to the ASTM D256-2010 standard. After conditioning for 48 hours or more in an environment of 25°C and 50% humidity, the test was conducted and the results were recorded as room temperature impact strength.

[0051] Low-temperature impact strength: The 3.0 mm IZOD impact strength was tested according to ASTM D256-2010. The specimen was placed in an environmental control box preset at -30°C for at least 8 hours before testing, and the results were recorded as low-temperature impact strength. The higher the test result, the better the toughness.

[0052] Appearance: At an injection molding temperature of 280°C, an injection molding speed of 85%, and an injection pressure of 85%, square plates 1.0 mm thick and 100 mm long were molded. The surfaces of 10 consecutively injection-molded samples were visually inspected and their appearance was evaluated. Grade A was given if all 10 samples were free of any defects; Grade B if 1 to 3 samples had minor defects such as water splashes or silver streaks; Grade C if more than 3 samples had minor defects such as water splashes or silver streaks; and Grade D if at least 1 sample had serious water splashes or silver streaks.

[0053] The polycarbonate alloy materials of the present invention and comparative examples were manufactured using the following process: Each component was weighed according to its mixing ratio, then mixed in a high-speed mixer and blended to obtain a premix. The resulting mixture was then extruded in a twin-screw extruder and melt-granulated to obtain the polycarbonate alloy material. The mixing speed was 65 rpm, the aspect ratio of the twin-screw extruder was 40:1, the barrel temperature was 220-260°C, and the screw speed was 250-650 rpm. Examples 1 to 25

[0054] Examples 1-25 provide a series of polycarbonate alloy materials, the formulations of which are shown in Tables 1, 2, and 3.

[0055] [Table 1]

[0056] [Table 2]

[0057] [Table 3] Comparative Example 1

[0058] This comparative example provides a polycarbonate alloy material, and is different from Example 1 in that the modified metal hydroxide 1# is not added to the formulation. Comparative Example 2

[0059] This comparative example provides a polycarbonate alloy material, and compared with Example 1, the difference is that the modified metal hydroxide 1# is replaced with the metal hydroxide 1# in the formulation. Comparative Example 3

[0060] This comparative example provides a polycarbonate alloy material, and compared with Example 1, the difference is that the modified metal hydroxide 1# is replaced with dimethylsiloxane in the formulation. The properties of the polycarbonate alloy materials of each example and comparative example were measured according to the test methods described above, and the test results are shown in Table 4.

[0061] [Table 4]

[0062] From Table 4, it can be seen that the polycarbonate alloy materials of Examples 1 to 25 have a slow burning rate, satisfying the requirement of a burning rate of ≦75 mm / min specified in the UL94 standard, and also have good mechanical properties and appearance.

[0063] A comparison of Examples 1 to 5 revealed that the amount of each component had a certain effect on the burn rate, impact strength, low-temperature impact strength, and appearance. Specifically, polycarbonate has a relatively large effect on burn rate. Therefore, when the amount of polycarbonate used is relatively high within a certain range, the burn rate of the slow-burning polycarbonate composite material is relatively slow. Therefore, the burn rate of Example 2 is slower than that of Example 4, and the burn rate of Example 5 is slower than that of Example 3. Impact strength and low-temperature impact strength are affected not only by the polycarbonate and modified metal hydroxide, but also to some extent by the amounts of other components. Under comprehensive control of each component, the impact strength and low-temperature impact strength of Example 1 are the best, while the impact strength and low-temperature impact strength of Example 4 are better than those of Example 2 and Example 5, respectively, and are better than those of Example 3.

[0064] It was found from Examples 1 and 12 to 14 that the higher the acrylonitrile content in the styrene-acrylonitrile copolymer, the slower the burning rate of the resulting polycarbonate alloy material. It was found from Examples 12 and 15 that the burning rate of the polycarbonate alloy material obtained using a styrene-acrylonitrile copolymer (Example 12) was slower than the burning rate of the polycarbonate alloy material obtained using a styrene-butadiene-styrene copolymer (Example 15).

[0065] Examples 1, 16, 17, and 18 showed that when the silicon content of the toughener was within an appropriate range (6 to 60 wt%), the burn rate of the resulting polycarbonate alloy material was slower. When silicone rubber was used as the core of the core-shell toughener, the burn rate of the resulting polycarbonate alloy material was slower than when polybutadiene was used as the core of the core-shell toughener (e.g., Example 19). When a core-shell toughener was used, the burn rate of the polycarbonate alloy material was slower than when a non-core-shell toughener (e.g., Example 20) was used.

[0066] Examples 1 and 21-23 show that when the silicon content of the modified metal hydroxide is relatively high (Examples 1, 21, and 22), the burning rate of the resulting polycarbonate alloy material is slower. Examples 1 and 24 show that the burning rate of the polycarbonate alloy material obtained using magnesium hydroxide as the metal hydroxide (Example 1) is slower than the burning rate of the polycarbonate alloy material obtained using aluminum hydroxide (Example 24).

[0067] In Comparative Example 1, no modified metal hydroxide was added, and the resulting polycarbonate alloy material had a relatively high burn rate. In Comparative Example 2, a metal hydroxide was directly added, and the resulting polycarbonate alloy material had a relatively high burn rate, a relatively poor appearance rating, and relatively low impact strength and low-temperature impact strength. In Comparative Example 3, dimethylsiloxane was directly added, and the resulting polycarbonate alloy material had a relatively high burn rate, a relatively poor appearance rating, and relatively low impact strength and low-temperature impact strength.

[0068] The above examples of the present invention are merely examples for clearly explaining the present invention and do not limit the embodiments of the present invention. Those skilled in the art can make various other changes or modifications based on the above description. It is not necessary or possible to list all embodiments here in a restrictive manner. Any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A polycarbonate alloy material, As ingredients, 10 to 99.9 parts by weight of polycarbonate resin; 5 to 50 parts by weight of a styrene-based resin; 0.05 to 2 parts by weight of a modified metal hydroxide; 1 to 30 parts by weight of a toughener; 0.01 to 2 parts by weight of a stabilizer; the modified metal hydroxide is a metal hydroxide surface-treated with dimethylsiloxane and / or methylphenylsiloxane; The polycarbonate alloy material is characterized in that the styrene-based resin is at least one of a styrene-acrylonitrile copolymer and a styrene-butadiene-styrene copolymer.

2. 2. The polycarbonate alloy material according to claim 1, wherein the styrene-based resin is a styrene-acrylonitrile copolymer.

3. 3. The polycarbonate alloy material according to claim 2, wherein the styrene-acrylonitrile copolymer has an acrylonitrile content of 28 to 40 wt %.

4. 2. The polycarbonate alloy material according to claim 1, wherein the silicon content of the modified metal hydroxide is 1 to 6 wt %.

5. 2. The polycarbonate alloy material according to claim 1, wherein the polycarbonate resin is a virgin polycarbonate resin and / or a recycled polycarbonate resin.

6. 6. The polycarbonate alloy material according to claim 5, wherein the virgin polycarbonate resin has a number average molecular weight of 22,000 to 30,000.

7. The polycarbonate alloy material of claim 1, wherein the toughener is a core-shell structure toughener.

8. 2. The polycarbonate alloy material according to claim 1, wherein the metal hydroxide is at least one of magnesium hydroxide, aluminum hydroxide, and calcium hydroxide.

9. A method for preparing the polycarbonate alloy material according to any one of claims 1 to 8, comprising: A preparation method comprising the steps of mixing, melting, extruding and granulating each component to obtain the polycarbonate alloy material.

10. 9. Use of the polycarbonate alloy material according to any one of claims 1 to 8 in the manufacture of parts for electronic and electrical products, communication products, or automobiles as means of transportation.

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