Polycarbonate alloy composition as well as preparation method and application thereof

Abstract

The invention relates to a polycarbonate alloy composition as well as a preparation method and application thereof, and the polycarbonate alloy composition comprises the following components in parts by weight: 55-65 parts of polycarbonate, 20-30 parts of an acrylonitrile-butadiene-styrene copolymer, 5-10 parts of a styrene-maleic anhydride copolymer and 5-10 parts of a surfactant, the surfactant comprises an amino silane oligomer and / or an epoxy group silane oligomer. According to the polycarbonate alloy composition provided by the invention, the styrene-maleic anhydride copolymer and the specific surfactant are introduced into the acrylonitrile-butadiene-styrene copolymer and the polycarbonate, so that the surface energy and the blanket surface coating strength of the polycarbonate alloy composition can be improved; and the adhesive has no degumming phenomenon, is easier to adhere, and has excellent carpet surface coating performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymer material blending and modification, and particularly relates to a polycarbonate alloy composition, a preparation method thereof and an application thereof. Background Art

[0002] Polycarbonate (PC) is an engineering plastic with high impact resistance and high heat resistance, but it has a high melt viscosity, is difficult to process, and is sensitive to notches. Acrylonitrile-butadiene-styrene (ABS) resin is a thermoplastic polymer material with high strength, high toughness and easy processing. The PC / ABS alloy combines the advantages of PC and ABS resins and overcomes the disadvantages of both, and is the most common resin alloy material.

[0003] With the continuous development of new energy vehicle intelligent cockpits, the interior of automobiles uses a blanket wrapping method to improve the touch of interior parts. At present, PC / ABS is often used in automobile interiors and is wrapped with a blanket. The most common method is to bond PC / ABS with a blanket using glue. For example, the substrate of the automobile trunk lid is usually wrapped with a blanket. Generally, after the blanket is bonded to the substrate, it is required that there is no degumming or deformation after being stored at 80-85 °C for 20 days. The current process is generally to manually coat a primer on the substrate and then coat glue to bond the substrate and the blanket. However, the cost of manually coating the primer remains high, which affects the application of PC / ABS in automobile interiors. The current mainstream solution is to remove the primer coating process and directly coat the glue on the substrate and then bond it with the blanket. However, the yield rate has been unable to meet the requirements after removing the primer coating process, mainly manifested in the following two problems: (1) debonding at the curved surface; (2) the glue turns white when torn by hand and turns black at high temperature. The bonding strength between the glue and the substrate at the curved surface is lower than that in other places. It may be that: 1. The internal stress in the bonded blanket at the curved surface is too large, and the stress during heat storage is greater than the bonding force, resulting in debonding; 2. The bonding force between the substrate and the glue is insufficient.

[0004] CN107325522A discloses an ABS-modified PC composite material. The components of the ABS-modified PC composite material include: 80 - 110 parts of PC, 30 - 45 parts of ABS, 15 - 20 parts of polybutylene terephthalate, 10 - 30 parts of filler, 4 - 9 parts of plasticizer, 2 - 5 parts of flame retardant, and 1 - 4 parts of lubricant; CN106349672A discloses a modified PC / ABS alloy material, which is prepared from the following raw materials in parts by weight: 55 - 65 parts of PC resin, 35 - 45 parts of ABS resin, 1 - 5 parts of N-phenyl maleimide, 1 - 5 parts of vinyltris(2-methoxyethoxy)silane, 1 - 5 parts of flame retardant, and 0.6 - 1.8 parts of antioxidant. However, the existing PC / ABS alloy materials have low surface energy, and it is not easy to adhere the carpet surface to its surface with glue. Therefore, it is urgent to design a polycarbonate alloy composition with high surface energy and carpet covering strength. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a polycarbonate alloy composition, its preparation method and application; the polycarbonate alloy composition provided by the present invention can improve the surface energy and carpet covering strength of the polycarbonate alloy composition by introducing styrene-maleic anhydride copolymer and a specific surfactant into acrylonitrile-butadiene-styrene copolymer and polycarbonate, and after bonding the carpet surface with glue, there is no degumming phenomenon, it is easier to be adhered, and it has excellent carpet covering performance.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] In the first aspect, the present invention provides a polycarbonate alloy composition. In parts by weight, the polycarbonate alloy composition includes the following components:

[0008]

[0009] The surfactant includes amino silane oligomer and / or epoxy silane oligomer.

[0010] The polycarbonate alloy composition provided by the present invention, through the compounding of styrene-maleic anhydride copolymer with a specific surfactant and the mutual cooperation with other components of the polycarbonate alloy composition, enables the polycarbonate alloy composition to have high surface energy, notched impact strength, Vicat softening temperature and carpet covering strength. After bonding the carpet surface with glue, there is no degumming phenomenon, and it has excellent carpet covering performance.

[0011] In the present invention, the amino silane oligomer refers to a type of silane oligomer containing amino groups, and its molecular structure can be: Wherein each R can be independently selected from any one of C1-C10 linear or branched alkyl groups (such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-hexyl, n-octyl, n-pentyl, isopentyl, neopentyl, n-heptyl, n-nonyl, n-decyl, etc.); it can be obtained by purchase, and exemplary ones include but are not limited to the amino-silane oligomer 6651 of Guangzhou Slokor, and can also be obtained by hydrolysis and condensation reaction of siloxane monomers containing amino groups.

[0012] The epoxy-group-containing silane oligomer refers to a class of silane oligomers containing epoxy groups, such as γ-(2,3-epoxypropoxy)propyltrimethoxysilane oligomers; it can be obtained by purchase, and exemplary ones include but are not limited to the epoxy-group-containing silane oligomer 6654 of Guangzhou Slokor; it can also be obtained by hydrolysis and condensation reaction of siloxane monomers containing epoxy groups.

[0013] In the polycarbonate alloy composition, the polycarbonate is 55-65 parts by weight, for example, it can be 56 parts by weight, 57 parts by weight, 58 parts by weight, 59 parts by weight, 60 parts by weight, 61 parts by weight, 62 parts by weight, 63 parts by weight, 64 parts by weight, etc.

[0014] Preferably, the mass percentage content of polycarbonate in the polycarbonate alloy composition is ≥50%.

[0015] The acrylonitrile-butadiene-styrene copolymer is 20-30 parts by weight, for example, it can be 21 parts by weight, 22 parts by weight, 23 parts by weight, 24 parts by weight, 25 parts by weight, 26 parts by weight, 27 parts by weight, 28 parts by weight, 29 parts by weight, etc.

[0016] The styrene-maleic anhydride copolymer is 5-10 parts by weight, for example, it can be 5.2 parts by weight, 5.5 parts by weight, 5.8 parts by weight, 6 parts by weight, 6.2 parts by weight, 6.5 parts by weight, 6.8 parts by weight, 7 parts by weight, 7.2 parts by weight, 7.5 parts by weight, 7.8 parts by weight, 8 parts by weight, 8.2 parts by weight, 8.5 parts by weight, 8.8 parts by weight, 9 parts by weight, 9.2 parts by weight, 9.5 parts by weight, 9.8 parts by weight, etc.

[0017] The surfactant is 5-10 parts by weight, for example, it can be 5.2 parts by weight, 5.5 parts by weight, 5.8 parts by weight, 6 parts by weight, 6.2 parts by weight, 6.5 parts by weight, 6.8 parts by weight, 7 parts by weight, 7.2 parts by weight, 7.5 parts by weight, 7.8 parts by weight, 8 parts by weight, 8.2 parts by weight, 8.5 parts by weight, 8.8 parts by weight, 9 parts by weight, 9.2 parts by weight, 9.5 parts by weight, 9.8 parts by weight, etc.

[0018] The following are the preferred technical solutions of the present invention, but do not limit the technical solutions provided by the present invention. Through the following preferred technical solutions, the objectives and beneficial effects of the present invention can be better achieved and realized.

[0019] As a preferred technical solution, in accordance with the ISO 1133-1:2022 standard, the melt index of the polycarbonate at 300 °C and a load of 1.2 kg is 8-12 g / 10 min, and can be, for example, 8.2 g / 10 min, 8.5 g / 10 min, 8.8 g / 10 min, 9 g / 10 min, 9.2 g / 10 min, 9.5 g / 10 min, 9.8 g / 10 min, 10 g / 10 min, 10.2 g / 10 min, 10.5 g / 10 min, 10.8 g / 10 min, 11 g / 10 min, 11.2 g / 10 min, 11.5 g / 10 min, 11.8 g / 10 min, etc.

[0020] Preferably, the polycarbonate is bisphenol A polycarbonate.

[0021] Preferably, in accordance with the ISO 1133-1:2022 standard, the melt index of the acrylonitrile-butadiene-styrene copolymer at 220 °C and a load of 10 kg is 12-18 g / 10 min, and can be, for example, 12.5 g / 10 min, 13 g / 10 min, 13.5 g / 10 min, 14 g / 10 min, 14.5 g / 10 min, 15 g / 10 min, 15.5 g / 10 min, 16 g / 10 min, 16.5 g / 10 min, 17 g / 10 min, 17.5 g / 10 min, etc.

[0022] Preferably, the acrylonitrile-butadiene-styrene copolymer is an acrylonitrile-butadiene-styrene copolymer prepared by bulk polymerization.

[0023] Preferably, in accordance with ISO 1628-2009, the weight-average molecular weight of the styrene-maleic anhydride copolymer is 100,000-140,000 g / mol, and can be, for example, 102,000 g / mol, 105,000 g / mol, 108,000 g / mol, 110,000 g / mol, 112,000 g / mol, 115,000 g / mol, 118,000 g / mol, 120,000 g / mol, 122,000 g / mol, 125,000 g / mol, 128,000 g / mol, 130,000 g / mol, 132,000 g / mol, 135,000 g / mol, 138,000 g / mol, etc.

[0024] Preferably, the mass percentage content of maleic anhydride structural units in the styrene-maleic anhydride copolymer is 20-25%, for example, it can be 20.5%, 21%, 21.5%, 22%, 22.5%, 23%, 23.5%, 24%, 24.5%, etc.

[0025] Preferably, the number average molecular weight of the amino-silane oligomer is 4000-5000, for example, it can be 4100, 4200, 4300, 4400, 4500, 4600, 4700, 4800 or 4900, etc.

[0026] Preferably, the number average molecular weight of the epoxy-silane oligomer is 4000-5000, for example, it can be 4100, 4200, 4300, 4400, 4500, 4600, 4700, 4800 or 4900, etc.

[0027] In the present invention, the number average molecular weight of the amino-silane oligomer or epoxy-silane oligomer is tested in accordance with ISO 16014-3:2019.

[0028] Preferably, the mass ratio of the surfactant to the styrene-maleic anhydride copolymer is 1:(0.5-2), more preferably 1:(0.8-1.5), for example, it can be 1:09, 1:0.95, 1:1, 1:1.05, 1:1.1, 1:1.15, 1:1.2, 1:1.25, 1:1.3, 1:1.35, 1:1.4, 1:1.45, etc.

[0029] Preferably, the polycarbonate alloy composition further comprises a toughening agent.

[0030] Preferably, the toughening agent comprises acrylonitrile-butadiene-styrene high rubber powder and / or methyl methacrylate-butadiene-styrene copolymer.

[0031] Preferably, the amount of the toughening agent in the polycarbonate alloy composition is 2-5 parts by weight, for example, it can be 2.2 parts by weight, 2.4 parts by weight, 2.6 parts by weight, 2.8 parts by weight, 3 parts by weight, 3.2 parts by weight, 3.4 parts by weight, 3.6 parts by weight, 3.8 parts by weight, 4 parts by weight, 4.2 parts by weight, 4.4 parts by weight, 4.6 parts by weight, 4.8 parts by weight, etc.

[0032] Preferably, the polycarbonate alloy composition further comprises an antioxidant.

[0033] Preferably, the antioxidant comprises any one or a combination of at least two of hindered phenol antioxidants, thioester antioxidants, phosphite antioxidants or hindered amine antioxidants.

[0034] Preferably, the antioxidant in the polycarbonate alloy composition is 0.2 - 1 part by weight, for example, it can be 0.25 part by weight, 0.3 part by weight, 0.35 part by weight, 0.4 part by weight, 0.45 part by weight, 0.5 part by weight, 0.55 part by weight, 0.6 part by weight, 0.65 part by weight, 0.7 part by weight, 0.75 part by weight, 0.8 part by weight, 0.85 part by weight, 0.9 part by weight, 0.95 part by weight, etc.

[0035] Preferably, the polycarbonate alloy composition further comprises a lubricant.

[0036] Preferably, the lubricant comprises any one or a combination of at least two of magnesium stearate, pentaerythritol stearate, vinyl bisstearamide, or polyethylene wax.

[0037] Preferably, the lubricant in the polycarbonate alloy composition is 0.2 - 1 part by weight, for example, it can be 0.25 part by weight, 0.3 part by weight, 0.35 part by weight, 0.4 part by weight, 0.45 part by weight, 0.5 part by weight, 0.55 part by weight, 0.6 part by weight, 0.65 part by weight, 0.7 part by weight, 0.75 part by weight, 0.8 part by weight, 0.85 part by weight, 0.9 part by weight, 0.95 part by weight, etc.

[0038] In a second aspect, the present invention provides a method for preparing the polycarbonate alloy composition as described in the first aspect, and the preparation method comprises the following steps:

[0039] Melting and blending polycarbonate, acrylonitrile - butadiene - styrene copolymer, styrene - maleic anhydride copolymer, and a surfactant, and then extruding to obtain the polycarbonate alloy composition.

[0040] Preferably, the materials for melting and blending further comprise any one or a combination of at least two of a toughening agent, a lubricant, or an antioxidant.

[0041] Preferably, the melting and blending is carried out in a twin - screw extruder.

[0042] Preferably, the twin - screw extruder is a co - rotating twin - screw extruder.

[0043] Preferably, the length - to - diameter ratio of the screw of the twin - screw extruder is (25 - 48):1, for example, it can be 26:1, 28:1, 30:1, 32:1, 34:1, 36:1, 38:1, 40:1, 42:1, 44:1, 46:1, etc.

[0044] Preferably, the screw speed of the twin-screw extruder is 400 - 600 rpm, for example, it can be 420 rpm, 440 rpm, 460 rpm, 480 rpm, 500 rpm, 520 rpm, 540 rpm, 560 rpm, 580 rpm, etc.

[0045] Preferably, the screw barrel of the twin-screw extruder is equipped with a vacuum pumping device, and the vacuum degree is -0.1 to -0.08 MPa. For example, it can be -0.082 MPa, -0.084 MPa, -0.086 MPa, -0.088 MPa, -0.09 MPa, -0.092 MPa, -0.094 MPa, -0.096 MPa, -0.098 MPa, etc.

[0046] Preferably, the temperature of the feeding and conveying section of the twin-screw extruder is 190°C - 220°C. For example, it can be 192°C, 195°C, 198°C, 200°C, 202°C, 205°C, 208°C, 210°C, 212°C, 215°C, 218°C, etc.

[0047] Preferably, the temperature of the core plasticizing section of the twin-screw extruder is 240°C - 260°C. For example, it can be 242°C, 246°C, 248°C, 250°C, 252°C, 254°C, 256°C, 258°C, etc.

[0048] Preferably, the temperature of the post-homogenization and extrusion section of the twin-screw extruder is 260°C - 270°C. For example, it can be 261°C, 262°C, 263°C, 264°C, 265°C, 266°C, 267°C, 268°C, 269°C, etc.

[0049] Preferably, after extrusion, it further includes the steps of cooling, drying, and pelletizing in sequence.

[0050] In the third aspect, the present invention provides an application of the polycarbonate alloy composition as described in the first aspect in automotive interiors.

[0051] In the fourth aspect, the present invention provides an automotive interior, which includes an interior body and a carpet surface. The preparation raw materials of the interior body include the polycarbonate alloy composition as described in the first aspect, and the carpet surface is coated on the surface of the interior body through an adhesive.

[0052] In the present invention, the automotive interior can be an automotive inner pillar with a carpet surface coated on its surface, a trunk lid with a carpet surface coated on its surface, etc.

[0053] Compared with the prior art, the present invention has the following beneficial effects:

[0054] The polycarbonate alloy composition provided by the present invention can improve the surface energy and the blanket covering strength of the polycarbonate alloy composition by introducing styrene-maleic anhydride copolymer and a specific surfactant into acrylonitrile-butadiene-styrene copolymer and polycarbonate. After bonding the blanket surface with glue, there is no degumming phenomenon, and it is more easily adhered, having excellent blanket covering performance. Detailed Embodiments

[0055] For the convenience of understanding the present invention, the following examples are listed. Those skilled in the art should understand that the said examples are only for helping to understand the present invention and should not be regarded as specific limitations on the present invention.

[0056] The sources of some components in the examples and comparative examples are as follows:

[0057] (1) Polycarbonate (PC): Purchased from Mitsubishi, S-2000F, with a melt index of 8-12 g / 10 min at 300 °C and a load of 1.2 kg;

[0058] (2) Acrylonitrile-butadiene-styrene copolymer (ABS): Purchased from Takahashi Petrochemical, ABS 8434, with a melt index of 12-18 g / 10 min at 220 °C and a load of 10 kg;

[0059] (3) Toughness agent:

[0060] Acrylonitrile-butadiene-styrene high rubber powder (ABS high rubber powder), purchased from South Korea Kumho Petrochemical, HR181;

[0061] Methyl methacrylate-butadiene-styrene copolymer (MBS), purchased from LG, EM500;

[0062] (4) Styrene-maleic anhydride copolymer (SMA): Purchased from Dutch polyscope, SZ23110, with a weight average molecular weight of 110,000 g / mol, and the mass percentage content of maleic anhydride structural units is 20-25%;

[0063] (5) Surfactant:

[0064] Aminosilane oligomer 1, purchased from Guangzhou Slokchem, 6651, with a number average molecular weight of 4000-5000;

[0065] Aminosilane oligomer 2, purchased from Evonik, VPS SIVO 280;

[0066] Epoxysilane oligomer 1, purchased from Guangzhou Slokchem, 6654, with a number average molecular weight of 4000-5000;

[0067] Epoxysilane oligomer 2, purchased from Momentive, MP200;

[0068] (6) Antioxidant: A mixture of BASF antioxidant 1010 and antioxidant 168 compounded at a mass ratio of 1:1;

[0069] (7) Lubricant: Pentaerythritol stearate, purchased from Cognis Germany, LOXIOL P 861 / 3.5;

[0070] (8) Diaminosilane: N-(2-Aminoethyl)-3-aminopropyltrimethoxysilane, purchased from Shin Energy, KH-792.

[0071] Example 1

[0072] A polycarbonate alloy composition, by weight, the polycarbonate alloy composition comprises the following components:

[0073]

[0074] The preparation method of the polycarbonate alloy composition comprises the following steps:

[0075] After drying the polycarbonate, acrylonitrile-butadiene-styrene copolymer, ABS high rubber powder, styrene-maleic anhydride copolymer, epoxy group silane oligomer 1, lubricant and antioxidant, mix them evenly in a high-speed mixer, and then put them into the main feeder of a twin-screw extruder. The screw diameter of the twin-screw extruder is 35 mm, the length-diameter ratio is 48:1, the temperature of the feeding and conveying section is 190 °C, the temperature of the core plasticizing section is 250 °C, the temperature of the subsequent homogenizing and extruding section is 260 °C, the vacuum degree is -0.08 MPa, and the rotational speed of the twin-screw is 500 rpm. After melting and blending the components, extrude them. The extruded strip is cooled, dried, and pelletized to obtain the polycarbonate alloy composition.

[0076] Examples 2-8, Comparative Examples 1-5

[0077] A polycarbonate alloy composition, the difference from Example 1 is only that the types and / or dosages (by weight) of the components are different, as shown in Table 1 and Table 2 specifically; the preparation method of the polycarbonate alloy composition is the same as that of Example 1.

[0078] Table 1

[0079]

[0080] Table 2

[0081]

[0082]

[0083] Performance Test

[0084] After drying the polycarbonate alloy compositions provided in the examples and comparative examples in a forced-air oven at 100 °C for 4 h, they were placed at a relative humidity of 50 ± 5% and a temperature of 23 ± 2 °C for 48 h, and then the performance tests were carried out according to the following methods. The test results are shown in Table 3 below;

[0085] (1) Notched Izod impact strength test: Injection mold a Type A notch according to the ISO 179-1:2010 standard, and the test temperature is room temperature.

[0086] (2) Vicat softening temperature: According to ISO 306:2022, standard test conditions: B50.

[0087] (3) Evaluation of blanket coating strength: Inject the polycarbonate alloy composition into a 125 mm × 13 mm × 3 mm spline using an injection molding machine, coat the surface of the spline with polyurethane hot melt adhesive, and the coating amount is 100 g / m 2 , and then cover the surface of the spline with a 0.5 mm thick PET blanket. After standing for 24 h at 23 °C and a relative humidity of 50%, use a tensiometer to test the tensile strength; test the force value required to debond the spline or break the spline.

[0088] Table 3

[0089]

[0090]

[0091] It can be seen from the test data in Table 3 that the notched Izod impact strength of the polycarbonate alloy compositions provided in Examples 1-8 is 45-55 kJ / m 2 , the blanket coating strength is 46-53 MPa, and the Vicat softening temperature is 115-124 °C.

[0092] SMA has limited improvement in the surface dyne value. The surfactant can improve the surface polarity. By controlling the mass ratio of the two within a suitable range, the notched impact strength and blanket coating strength of the polycarbonate alloy composition can be maintained at a good level. The polycarbonate alloy compositions provided in Example 4 (the mass ratio of the surfactant to SMA is greater than 1:0.8) and Example 5 (the mass ratio of the surfactant to SMA is less than 1:1.5) have relatively high blanket coating strength. Further, the polycarbonate alloy compositions provided in Examples 1-3 (the mass ratio of the surfactant to SMA is 1:1) have better blanket coating strength.

[0093] Through the synergistic compounding of SMA and surfactants and their interaction with PC resin and ABS resin, the present invention obtains a composite material with high impact resistance, high heat resistance, and high blanket covering strength. Compared with Example 1, in Comparative Example 1, SMA was not used. Even when the dosage of the surfactant was increased, the surface polarity of the polycarbonate alloy composition was still weak, and the blanket covering strength deteriorated. In Comparative Example 3, the surfactant was not used. Even when the dosage of SMA was increased, the blanket covering strength was still low.

[0094] By limiting the dosages of SMA and the surfactant within a suitable range, the present invention can endow the polycarbonate alloy composition with the characteristics of high impact resistance, high heat resistance, and high blanket covering strength. Compared with Example 3, in Comparative Example 2, the dosage of SMA was too high, resulting in poor blanket covering strength.

[0095] By using a specific surfactant, the present invention can improve the surface energy of the polycarbonate alloy composition. Compared with Example 1, in Comparative Example 4, sodium dodecylbenzenesulfonate was used as the surfactant, which could not effectively improve the surface energy of the polycarbonate alloy composition. The blanket covering strength of the polycarbonate alloy composition decreased significantly, and the blanket covering performance was poor.

[0096] Compared with Example 1, in Comparative Example 5, a common silane coupling agent was used instead of the epoxy group silane oligomer, which could not effectively improve the surface energy of the polycarbonate alloy composition. The blanket covering strength of the polycarbonate alloy composition decreased significantly, and the blanket covering performance was poor.

[0097] The applicant declares that the present invention uses the above examples to illustrate the polycarbonate alloy composition of the present invention, its preparation method, and applications. However, the present invention is not limited to the above examples, that is, it does not mean that the present invention must rely on the above examples to be implemented. Those skilled in the art should understand that any improvement to the present invention, the equivalent substitution of each raw material of the products of the present invention, the addition of auxiliary components, and the selection of specific methods, etc., all fall within the protection scope and the disclosure scope of the present invention.

Claims

1. A polycarbonate alloy composition, characterized in that, The polycarbonate alloy composition comprises the following components by weight parts: 55 - 65 parts by weight of polycarbonate 20 - 30 parts by weight of acrylonitrile - butadiene - styrene copolymer 5 - 10 parts by weight of styrene - maleic anhydride copolymer 5 - 10 parts by weight of surfactant; The surfactant includes amino - silane oligomer and / or epoxy - silane oligomer.

2. The polycarbonate alloy composition according to claim 1, characterized in that, The polycarbonate has a melt index of 8 - 12 g / 10min at 300 °C under a load of 1.2 kg; Preferably, the polycarbonate is bisphenol A type polycarbonate; Preferably, the acrylonitrile - butadiene - styrene copolymer has a melt index of 12 - 18 g / 10min at 220 °C under a load of 10 kg.

3. The polycarbonate alloy composition according to claim 1, characterized in that, The weight - average molecular weight of the styrene - maleic anhydride copolymer is 100000 - 140000 g / mol; Preferably, the mass percentage content of maleic anhydride structural units in the styrene - maleic anhydride copolymer is 20 - 25%.

4. The polycarbonate alloy composition according to claim 1, characterized in that, The number - average molecular weight of the amino - silane oligomer is 4000 - 5000; Preferably, the number - average molecular weight of the epoxy - silane oligomer is 4000 - 5000; Preferably, the mass ratio of the surfactant to the styrene - maleic anhydride copolymer is 1:(0.8 - 1.5).

5. The polycarbonate alloy composition according to claim 1, wherein The polycarbonate alloy composition further comprises a toughening agent; Preferably, the toughening agent includes acrylonitrile - butadiene - styrene high rubber powder and / or methyl methacrylate - butadiene - styrene copolymer; Preferably, the amount of the toughening agent in the polycarbonate alloy composition is 2 - 5 parts by weight.

6. The polycarbonate alloy composition according to claim 1, wherein The polycarbonate alloy composition further comprises an antioxidant; Preferably, the antioxidant includes any one or a combination of at least two of hindered phenol antioxidants, thioester antioxidants, phosphite antioxidants or hindered amine antioxidants; Preferably, the amount of the antioxidant in the polycarbonate alloy composition is 0.2 - 1 part by weight.

7. The polycarbonate alloy composition according to claim 1, wherein The polycarbonate alloy composition further comprises a lubricant; Preferably, the lubricant includes any one or a combination of at least two of magnesium stearate, pentaerythritol stearate, ethylene bisstearamide or polyethylene wax; Preferably, the amount of the lubricant in the polycarbonate alloy composition is 0.2 - 1 part by weight.

8. A method for preparing a polycarbonate alloy composition according to any one of claims 1-7, characterized in that, The preparation method comprises the following steps: Melting and blending polycarbonate, acrylonitrile - butadiene - styrene copolymer, styrene - maleic anhydride copolymer and surfactant, and then extruding to obtain the polycarbonate alloy composition.

9. Use of a polycarbonate alloy composition according to any one of claims 1 - 7 in automotive interiors.

10. An automotive interior, characterized in that, The automotive interior includes an interior body and a carpet surface. The raw material for preparing the interior body includes a polycarbonate alloy composition according to any one of claims 1 - 7, and the carpet surface is coated on the surface of the interior body through an adhesive.

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