Scratch-resistant and sunscreen-resistant pc / abs composite material and preparation method and application thereof

Abstract

The application provides a scratch-resistant and sunscreen-resistant PC / ABS composite material and a preparation method and application thereof. The PC / ABS composite material comprises PC resin, silicon-containing PC resin, ABS resin, toughening agent and scratch-resistant agent in specific proportions. The components are matched in specific amounts, in particular, the silicon-containing PC resin, conventional PC resin and specific scratch-resistant agent are matched, and the ABS resin is limited to comprise transparent ABS resin, so that the obtained PC / ABS composite material has excellent scratch-resistant performance and sunscreen-resistant performance. The PC / ABS composite material can be used as internal material of products and surface material of high-gloss products, solves the limitation that the existing PC / ABS composite material can only be used as external part or internal part, and is suitable for application in products such as automobiles, notebook computers, tablet computers, smart phones, smart earphones or smart home.

Description

Technical Field

[0001] This invention belongs to the field of composite material technology, specifically relating to a PC / ABS composite material that is scratch-resistant and sunscreen-resistant, its preparation method, and its application. Background Technology

[0002] As people's living standards improve, their demand for spiritual fulfillment increases after their material needs are met. Coupled with the widespread adoption of smart wearables, portable music players and smart headphones have emerged. Headphones, which were originally only for music, can now also be used for phone calls; and those that were wired have evolved into wireless ones. With the increasing user base, the requirements for headphone materials are becoming increasingly stringent, especially for women who use them more frequently. However, because women frequently use various cosmetics, higher demands are placed on materials that are resistant to chemicals and cosmetics. Furthermore, for safety reasons, flame-retardant properties have been added to the materials, and the increased frequency of use also presents new requirements for scratch resistance.

[0003] CN109852026A discloses a sunscreen-resistant PC / ABS alloy material and its preparation method, which is formulated from the following raw materials in parts by weight: 20-80 parts by weight of polycarbonate resin (PC), 5-70 parts by weight of acrylonitrile-butadiene-styrene copolymer (ABS), 5 parts by weight of methyl methacrylate-butadiene-styrene terpolymer, 1 part by weight of colorant, 0-5 parts by weight of polyethylene-styrene-acrylonitrile graft copolymer, 0-5 parts by weight of polytetrafluoroethylene, 0-1 part by weight of terephthalic acid-ethylene glycol copolyester, and silicone. The main innovation of this invention lies in the addition of wear-resistant additives, which were originally intended to improve the overall wear resistance of the material, but unexpectedly resulted in a PC / ABS material with excellent chemical resistance to sunscreen, thus improving the material quality and broadening its application range. However, the PC / ABS resin provided by this invention has poor scratch resistance (scratch resistance refers to the degree to which a material is scratched by a fingernail or other sharp object, and the extent to which the scratch disappears), and it is mainly used in automotive interior parts.

[0004] CN104927334A discloses a cosmetic-resistant PC / ABS alloy material, which is made of the following components in parts by weight: 40-80 parts PC resin, 20-60 parts ABS resin, 2-5 parts POE resin, 0.5-1 part compatibilizer, 0.1-1 part antioxidant, and 0.1-1 part lubricant. This invention also provides a method for preparing the cosmetic-resistant PC / ABS alloy material. The alloy material provided by this invention has excellent cosmetic resistance. The introduction of the compatibilizer improves the compatibility between POE and PC / ABS, enhancing the cosmetic resistance of the PC / ABS alloy material while maintaining its basic physical properties. However, the alloy material provided by this invention has poor flame retardancy and is also intended for use in automotive interior parts; furthermore, it does not address scratch resistance.

[0005] CN109957225A discloses a high-strength, scratch-resistant, halogen-free, flame-retardant PC / ABS composite material and its preparation method, comprising the following components by weight percentage: PC resin 38-71%; ABS resin 10-34%; thermoplastic polyester elastomer 3-5%; polyaryl phosphate ester 5-10%; rare earth phenyl phosphate salt 0.5-3%; metal hybrid polysilsesquioxane 0.5-2%; carbon nanotubes 5-15%; and compatibilizer 1-5%. This high-strength, scratch-resistant, halogen-free, flame-retardant PC / ABS composite material possesses advantages such as good processability, high strength, good flame retardancy, and excellent scratch resistance. It is suitable for preparing high-strength, scratch-resistant, and flame-retardant ultra-thin parts, and can be applied in fields such as laptops, tablets, and smartphones, replacing expensive and bulky metal alloys in high-end electronic products. However, the composite material provided by this invention has poor sunscreen resistance and is mainly used in laptops, tablets, and smartphones. Furthermore, due to the addition of carbon nanotubes, the material can only be made black, limiting its application scenarios.

[0006] CN113121974A discloses a PC / ABS alloy material with high wear resistance and its preparation method. The high wear-resistant PC / ABS alloy material comprises, by weight, 60-80 parts of PC matrix resin, 25-35 parts of ABS matrix resin, 10-20 parts of glass fiber, 8-15 parts of polyester rubber, 4-9 parts of wear-resistant agent, 12-18 parts of polysiloxane, 5-10 parts of compatibilizer, 3-7 parts of heat stabilizer, 2-5 parts of toughening agent, and 0.5-3 parts of lubricant. This invention adds polyester rubber, nano-mineral crystals, and polytetrafluoroethylene to the system, which can significantly improve the scratch resistance and impact resistance of the composite material. When polysiloxane is added to the material, it slowly migrates to the surface of the material and forms a continuous thin film, providing wear resistance to the material through high film-forming properties. However, due to the addition of glass fiber to the system, the resulting PC / ABS alloy material cannot be used to make products that require a smooth and flat surface, and can only be used as an internal structural component, which limits the application range of PC / ABS alloy material.

[0007] Therefore, in order to solve the above technical problems, it is urgent to develop a PC / ABS composite material that has both excellent scratch resistance and sunscreen resistance. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the present invention aims to provide a PC / ABS composite material that is scratch-resistant and sunscreen-resistant, as well as its preparation method and application. The PC / ABS composite material has both excellent scratch resistance and sunscreen resistance, and can be used not only as an internal structural component but also as a surface material for high-gloss products. Furthermore, it can be made into various colors according to requirements, thus overcoming the limitation of existing PC / ABS composite materials that can only be used as external or internal components.

[0009] To achieve this objective, the present invention adopts the following technical solution:

[0010] In a first aspect, the present invention provides a PC / ABS composite material that is scratch-resistant and sunscreen-resistant, the PC / ABS composite material comprising the following components by weight:

[0011]

[0012] The ABS resin includes transparent ABS resin.

[0013] The PC resin can be 52 parts by weight, 54 parts by weight, 56 parts by weight, 58 parts by weight, 60 parts by weight, 62 parts by weight, 64 parts by weight, 66 parts by weight, or 68 parts by weight, etc.

[0014] The silicon-containing PC resin can be 7.5 parts by weight, 8 parts by weight, 8.5 parts by weight, 9 parts by weight, 9.5 parts by weight, 10 parts by weight, 10.5 parts by weight, 11 parts by weight, 11.5 parts by weight, 12 parts by weight, or 12.5 parts by weight, etc.

[0015] The ABS resin can be 7.5 parts by weight, 8 parts by weight, 8.5 parts by weight, 9 parts by weight, 9.5 parts by weight, 10 parts by weight, 10.5 parts by weight, 11 parts by weight, 11.5 parts by weight, 12 parts by weight, or 12.5 parts by weight, etc.

[0016] The toughening agent can be 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, 5.5 parts by weight, 6 parts by weight, 6.5 parts by weight, 7 parts by weight, or 7.5 parts by weight, etc.

[0017] The scratch-resistant agent can be 0.6 parts by weight, 0.7 parts by weight, 0.8 parts by weight, 0.9 parts by weight, 1 part by weight, 1.1 parts by weight, 1.2 parts by weight, 1.3 parts by weight, or 1.4 parts by weight, etc.

[0018] The PC / ABS composite material provided by this invention comprises a specific number of parts of PC resin, silicone-containing PC resin, ABS resin, toughening agent, and scratch-resistant agent, and the ABS resin is limited to transparent ABS resin. It should be noted that the aforementioned PC resin refers to conventional PC resin without silicone, while the silicone-containing PC resin refers to PC resin synthesized by block copolymerization with polydimethylsiloxane during the synthesis process. By introducing organosilicon groups, the flexibility, processability, hydrolysis resistance, corrosion resistance, oxidation resistance, and yellowing resistance of the silicone-containing PC resin are significantly improved. This invention uses the silicone-containing PC resin and PC resin in combination, and adds ABS resin, toughening agent, and scratch-resistant agent, while limiting the ABS resin to transparent ABS resin. This results in a PC / ABS composite material with both excellent scratch resistance and sunscreen resistance, which can be used not only as an internal material for products but also as a surface material for high-gloss products, overcoming the limitation of existing PC / ABS composite materials being used only as external or internal components.

[0019] Preferably, the number average molecular weight of the PC resin is 17,000 to 25,000, such as 18,000, 19,000, 20,000, 21,000, 22,000, 23,000 or 24,000, and more preferably 19,000 to 22,000.

[0020] The present invention further limits the number average molecular weight of PC resin to 17,000 to 25,000, so that it has excellent toughness, chemical resistance and processing fluidity. If the number average molecular weight is lower than 17,000, the toughness and chemical resistance of PC resin will be poor. If the number average molecular weight is higher than 25,000, the fluidity of PC resin will be poor and processing will be more difficult.

[0021] Preferably, the number average molecular weight of the silicone-containing PC resin is 20,000 to 30,000, such as 21,000, 22,000, 23,000, 24,000, 25,000, 26,000, 27,000, 28,000 or 29,000, and more preferably 24,000 to 28,000.

[0022] Preferably, the content of silicone PC resin in the PC / ABS composite material is 8 to 12 parts by weight.

[0023] Preferably, the ABS resin further includes non-transparent ABS resin.

[0024] Preferably, the raw materials for preparing the non-transparent ABS resin include styrene (SM), acrylonitrile (AN), and butadiene (BD), and it is milky white or light yellow.

[0025] Preferably, the raw materials for preparing the transparent ABS resin include methyl methacrylate, acrylonitrile, styrene, and butadiene. The addition of methyl methacrylate to the raw materials of the transparent ABS resin gives it superior chemical resistance and higher hardness, which improves the composite material's resistance to sunscreen and scratches.

[0026] Preferably, the toughening agent comprises any one or a combination of at least two of the following: methyl methacrylate-butadiene-styrene terpolymer (MBS), methyl methacrylate-grafted crosslinked silicone acrylate rubber (ACR), POE-grafted maleic anhydride (POE-MAH), or ethylene and butyl acrylate copolymer (EBA).

[0027] Preferably, the toughening agent content in the PC / ABS composite material is 4 to 7 parts by weight.

[0028] Preferably, the scratch-resistant agent comprises any one or a combination of at least two of silicone masterbatch, polytetrafluoroethylene (PTFE), aldehyde-ketone modified polysiloxane, or epoxy fatty acid butyl ester.

[0029] Preferably, the PC / ABS composite material further includes any one or a combination of at least two of antioxidants, anti-dripping agents, flame retardants, or silicone oil.

[0030] Preferably, the antioxidant includes any one or a combination of at least two of antioxidants 1076, 168, or 1098.

[0031] Preferably, the anti-dripping agent comprises styrene / acrylonitrile copolymer coated with polytetrafluoroethylene.

[0032] Preferably, the content of anti-dripping agent in the PC / ABS composite material is 0.1 to 1 part by weight, such as 0.2 parts by weight, 0.3 parts by weight, 0.4 parts by weight, 0.5 parts by weight, 0.6 parts by weight, 0.7 parts by weight, 0.8 parts by weight, or 0.9 parts by weight.

[0033] Preferably, the flame retardant comprises any one or a combination of at least two of bisphenol A bis(diphenyl phosphate) (BDP), resorcinol bis(diphenyl phosphate) (RDP), triphenyl phosphate (TPP), or sulfonates.

[0034] Preferably, the flame retardant content in the PC / ABS composite material is 5 to 15 parts by weight, such as 6, 7, 8, 9, 10, 11, 12, 13, or 14 parts by weight, and more preferably 8 to 12 parts by weight. If the amount of flame retardant in the PC / ABS composite material is less than 5 parts by weight, the processability and flame retardancy of the composite material will be poor. If the amount of flame retardant is more than 15 parts by weight, the toughness of the composite material will decrease, and the cost will be higher, which is not conducive to market promotion.

[0035] In a second aspect, the present invention provides a method for preparing a scratch-resistant and sunscreen-resistant PC / ABS composite material as described in the first aspect, the method comprising: mixing PC resin, silicone-containing PC resin, ABS resin, toughening agent, scratch-resistant agent, optionally antioxidant, optionally anti-dripping agent, optionally flame retardant and optionally silicone oil, and extruding and granulating to obtain the scratch-resistant and sunscreen-resistant PC / ABS composite material.

[0036] Preferably, the preparation method specifically includes the following steps:

[0037] (1) Mix PC resin, silicone-containing PC resin and ABS resin evenly to obtain mixture A;

[0038] The toughening agent, optionally an anti-dripping agent, and optionally an antioxidant are mixed evenly to obtain mixture B;

[0039] (2) Mix the mixture A obtained in step (1) with silicone oil (optionally) until homogeneous, then add the mixture B obtained in step (1) and mix until homogeneous to obtain mixture C;

[0040] (3) The mixture C obtained in step (2) is fed through the main feeder, and the flame retardant is optionally fed through the side feeder. The mixture is then extruded and granulated through an extruder to obtain the PC / ABS composite material.

[0041] Preferably, the extrusion temperature of the extruder is 100-300℃, wherein the temperature of zone 1 is 100-200℃ (e.g., 110℃, 120℃, 130℃, 140℃, 150℃, 160℃, 170℃, 180℃ or 190℃, etc.), and the temperatures of zones 2, 3, 4, 5, 6, 7, 8, 9 and the die head are each independently 230-270℃ (e.g., 235℃, 240℃, 245℃, 250℃, 255℃, 260℃ or 265℃, etc.).

[0042] Preferably, the main speed of the extruder is 300-500 rpm, such as 320 rpm, 340 rpm, 360 rpm, 380 rpm, 400 rpm, 420 rpm, 440 rpm, 460 rpm or 480 rpm.

[0043] Thirdly, the present invention provides an application of the scratch-resistant and sunscreen-resistant PC / ABS composite material as described in the first aspect in automobiles, laptops, tablets, smartphones, smart headphones, or smart home products.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] The scratch-resistant and sunscreen-resistant PC / ABS composite material provided by this invention comprises a specific number of parts of PC resin, silicone-containing PC resin, ABS resin, toughening agent, and scratch-resistant agent. The ABS resin includes transparent ABS resin. By selecting the above components and combining them in specific amounts, particularly by adding silicone-containing PC resin, conventional PC resin, and a specific scratch-resistant agent, and limiting the ABS resin to transparent ABS resin, the resulting PC / ABS composite material possesses both excellent scratch resistance and sunscreen resistance. It can be used not only as an internal material for products but also as a surface material for high-gloss products. This overcomes the limitation of existing PC / ABS composite materials, which can only be used as external or internal parts, and is suitable for applications in products such as automobiles, laptops, tablets, smartphones, smart headphones, or smart home devices. Detailed Implementation

[0046] The technical solution of the present invention will be further illustrated below through specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of the present invention and should not be construed as limiting the invention in any way.

[0047] The following is some information about the raw materials involved in the specific implementation method:

[0048] Ordinary PC resin: PC-IR1900 from Idemitsu, Taiwan, with a number average molecular weight of 20,000;

[0049] Silicone-containing PC resin: Silicone PC-CH9115LT from Cangzhou Dahua, with a number average molecular weight of 26,000;

[0050] Transparent ABS resin: PA-757K sourced from Chi Mei Corporation in Taiwan;

[0051] Non-transparent ABS resin: PA-758 from Chi Mei Corporation in Taiwan;

[0052] Toughening agent: Methyl methacrylate grafted crosslinked silicone acrylate rubber (ACR), derived from Entropy Energy Innovative Materials LP2088;

[0053] Anti-scratch agent: silicone masterbatch, sourced from Dow Corning MB50-315; polytetrafluoroethylene (PTFE), sourced from 3M-TF9027; aldehyde-ketone modified polysiloxane, sourced from Lencolo 8710; epoxidized fatty acid butyl ester, sourced from West Asia Chemical.

[0054] Flame retardant: Bisphenol A bis(diphenyl) phosphate (BDP), derived from Wansheng Chemical's WSFR-BDP;

[0055] Anti-dripping agent: styrene / acrylonitrile copolymer coated polytetrafluoroethylene (SAN coated PTFE), derived from Zhenfu New Materials AD541, with a number average molecular weight of 4.5 million;

[0056] Silicone oil: derived from Dow Corning FCA-117;

[0057] Antioxidant: Specifically select antioxidant 1076.

[0058] Examples 1-10

[0059] A PC / ABS composite material that is scratch-resistant and sunscreen-resistant, the specific components of which are shown in Table 1, wherein the amount of each component is in "parts by weight".

[0060] Table 1

[0061]

[0062]

[0063] The preparation methods of the scratch-resistant and sunscreen-resistant PC / ABS composite materials provided in Examples 1-10 include the following steps:

[0064] (1) Mix PC resin, silicone-containing PC resin and ABS resin evenly to obtain mixture A;

[0065] The toughening agent, anti-dripping agent, and antioxidant are mixed evenly to obtain mixture B;

[0066] (2) Mix the mixture A obtained in step (1) with silicone oil until uniform, then add the mixture B obtained in step (1) and mix until uniform to obtain mixture C; (3) Feed the mixture C obtained in step (2) through the main feeder, feed the flame retardant through the side feeder, and extrude and granulate it through an extruder to obtain the scratch-resistant and sunscreen-resistant PC / ABS composite material.

[0067] The main extruder operates at 400 rpm, and the operating temperatures of each working zone are as follows: Zone 1: 150℃, Zones 2 to 9 and the die head: 250℃.

[0068] Comparative Examples 1-8

[0069] A PC / ABS composite material, the specific components of which are shown in Table 2, wherein the amount of each component is in "parts by weight".

[0070] Table 2

[0071]

[0072]

[0073] The preparation methods of the PC / ABS composite materials provided in Comparative Examples 1 to 8 are the same as those in Example 1.

[0074] Performance testing:

[0075] The prepared PC / ABS composite material was baked at 100℃ for 4 hours, and then injection molded into standard specimens using an injection molding machine. The following tests were then conducted, with the injection molding machine temperatures being: Zone 1: 230℃, Zone 2: 240℃, Zone 3: 250℃, Zone 4: 250℃, and nozzle: 250℃.

[0076] (1) Melt flow index: Tested according to ASTM D1238 standard;

[0077] (2) Flame retardancy: According to the UL94 standard test, the flame retardancy levels from weakest to strongest are HB, V2, V1, V0, 5VB and 5VA;

[0078] (3) Scratch resistance (pencil hardness): According to the ASTM3633-00 standard test, the hardness levels from softest to hardest are 6B, 5B, 4B, 3B, 2B, 1B, HB, F, 1H, 2H, 3H, 4H, 5H and 6H.

[0079] (4) Sunscreen resistance (SPF50): Apply 10g of commercially available sunscreen to the surface of the sample to be tested, place it in an environment with a temperature of 65℃ and a humidity of 90% for 24 hours, wipe off the cosmetic, place it at room temperature for 2 hours, and observe whether there is peeling, flaking, discoloration, cracking, etc. on the surface.

[0080] The PC / ABS composite materials provided in Examples 1-10 and Comparative Examples 1-8 were tested according to the above test methods. The test results are shown in Table 3.

[0081] Table 3

[0082] Melt index / g / 10min Flame retardancy Scratch resistance Sunscreen resistance Example 1 11 V0 H No change Example 2 7.3 V2 H No change Example 3 11.1 5VB F No change Example 4 11.2 V0 HB No change Example 5 12.2 V0 F No change Example 6 12.3 V0 F No change Example 7 11.9 V0 F No change Example 8 13.1 V0 HB No change Example 9 12.2 V0 HB No change Example 10 12.4 V0 HB No change Comparative Example 1 13.2 V0 F It is noticeably white Comparative Example 2 4.6 V2 H No change Comparative Example 3 11.3 V0 B It is noticeably white Comparative Example 4 12.6 V2 H No change Comparative Example 5 14.8 V0 H No change Comparative Example 6 11.8 V0 2B No change Comparative Example 7 4.8 HB H No change Comparative Example 8 12.5 V0 F It is noticeably white

[0083] According to the data in Table 3:

[0084] The PC / ABS composite material provided by this invention has excellent flame retardancy, scratch resistance, and sunscreen resistance, as detailed below:

[0085] (1) Comparing the data of Example 1 and Comparative Examples 1-2, it can be seen that the addition of silicone PC resin is beneficial to improving the scratch resistance and sunscreen resistance of PC / ABS composite material. Adding only ordinary PC resin (Comparative Example 1) will lead to a decrease in the sunscreen resistance of PC / ABS composite material, while adding only silicone PC resin (Comparative Example 2) will lead to poor flame retardancy, low melt index and poor fluidity of PC / ABS composite material. At the same time, since the price of silicone PC resin is relatively high, the formulation cost of PC / ABS composite material provided by Comparative Example 2 is also relatively high and has no mass production value.

[0086] (2) Comparing the data of Example 1 and Comparative Examples 3-4 and 8, it can be seen that the increase of transparent ABS resin will also improve the scratch resistance and sun protection resistance of PC / ABS composite material. However, if the amount of transparent ABS resin added is too low (Comparative Example 3) or no transparent ABS resin is added (Comparative Example 8), the scratch resistance and sun protection resistance of PC / ABS composite material will be relatively poor. If the amount of transparent ABS resin added is too high (Comparative Example 4), the flame retardancy of PC / ABS composite material will be weak.

[0087] (3) Comparing the data of Example 1 and Comparative Examples 5 to 7, it can be found that the PC / ABS composite material provided by Comparative Example 5 has good flame retardancy, scratch resistance and sunscreen resistance. However, since no toughening agent was added to the raw materials, the impact performance of the PC / ABS composite material is relatively poor and cannot meet the market requirements. The PC / ABS composite material provided by Comparative Example 6 did not add scratch-resistant additives to the raw materials, resulting in lower hardness and poor scratch resistance. The PC / ABS composite material provided by Comparative Example 7 did not add flame retardants to the raw materials, resulting in poor flame retardancy and only reaching the HB level.

[0088] (4) Further comparison of the data from Examples 1 and 5-10 shows that using silicone masterbatch, PTFE, aldehyde-ketone modified polysiloxane and epoxy fatty acid butyl ester as scratch-resistant additives helps to maximize the scratch resistance of the composite material.

[0089] The applicant declares that this invention illustrates a scratch-resistant and sunscreen-resistant PC / ABS composite material, its preparation method, and its application through the above embodiments. However, this invention is not limited to the above embodiments, meaning that this invention does not necessarily rely on the above embodiments for implementation. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of the raw materials in the product of this invention, additions of auxiliary components, and selection of specific methods, all fall within the protection and disclosure scope of this invention.

Claims

1. A scratch and sunblock resistant PC / ABS composite material, characterized in that, The PC / ABS composite material comprises the following components by weight: PC resin 50-70 parts by weight; Silicon-containing PC resin 7-13 parts by weight; ABS resin 7-13 parts by weight; Toughening agent 3-8 parts by weight; Scratch-resistant agent 0.5-1.5 parts by weight; The ABS resin comprises transparent ABS resin; The scratch-resistant agent is a combination of silicone masterbatch, aldehyde ketone modified polysiloxane and epoxy fatty acid butyl ester.

2. The PC / ABS composite according to claim 1, characterized in that, The number average molecular weight of the PC resin is 17000-25000.

3. The PC / ABS composite according to claim 2, characterized in that, The number average molecular weight of the PC resin is 19000-22000.

4. The PC / ABS composite of claim 1, wherein, The number average molecular weight of the silicon-containing PC resin is 20000-30000.

5. The PC / ABS composite according to claim 4, characterized in that, The number average molecular weight of the silicon-containing PC resin is 24000-28000.

6. The PC / ABS composite of claim 1, wherein, The content of the silicon-containing PC resin in the PC / ABS composite material is 8-12 parts by weight.

7. The PC / ABS composite of claim 1, wherein, The ABS resin further comprises non-transparent ABS resin.

8. The PC / ABS composite according to claim 7, characterized in that, The raw materials for preparing the non-transparent ABS resin comprise styrene, acrylonitrile and butadiene.

9. The PC / ABS composite of claim 1, wherein, The raw materials for preparing the transparent ABS resin comprise methyl methacrylate, acrylonitrile, styrene and butadiene.

10. The PC / ABS composite of claim 1, wherein, The toughening agent comprises any one or a combination of at least two of methyl methacrylate-butadiene-styrene terpolymer, methyl methacrylate grafted crosslinked silicone acrylate rubber, POE grafted maleic anhydride or copolymer of ethylene and butyl acrylate.

11. The PC / ABS composite of claim 1, wherein, The content of the toughening agent in the PC / ABS composite material is 4-7 parts by weight.

12. The PC / ABS composite of claim 1, wherein, The PC / ABS composite material further comprises any one or a combination of at least two of antioxidant, anti-dripping agent, flame retardant or silicone oil.

13. The PC / ABS composite of claim 12, wherein, The antioxidant comprises any one or a combination of at least two of antioxidant 1076, antioxidant 168 or antioxidant 1098.

14. The PC / ABS composite of claim 12, wherein, The anti-dripping agent comprises styrene / acrylonitrile copolymer coated polytetrafluoroethylene.

15. The PC / ABS composite of claim 12, wherein, The content of the anti-dripping agent in the PC / ABS composite material is 0.1-1 part by weight.

16. The PC / ABS composite of claim 12, wherein, The flame retardant comprises any one or a combination of at least two of bisphenol A bisdiphenyl phosphate, resorcinol bis(diphenyl phosphate), triphenyl phosphate or sulfonate.

17. The PC / ABS composite of claim 12, wherein, The content of the flame retardant in the PC / ABS composite material is 5-15 parts by weight.

18. The PC / ABS composite of claim 17, wherein, The content of the flame retardant in the PC / ABS composite material is 8-12 parts by weight.

19. A process for the production of a scratch and sunblock resistant PC / ABS composite material according to any one of claims 1 to 18, characterized in that, The preparation method comprises mixing PC resin, silicon-containing PC resin, ABS resin, toughening agent, scratch-resistant agent, optionally antioxidant, optionally anti-dripping agent, optionally flame retardant and optionally silicone oil, and extruding and granulating to obtain the scratch-resistant and sunblock-resistant PC / ABS composite material.

20. Use of the scratch-resistant and sunblock-resistant PC / ABS composite material according to any one of claims 1-18 in automobiles, notebook computers, tablet computers, smart phones, smart earphones or smart home products.

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