Alloy material for automobile exterior trimming parts

Abstract

The invention relates to an alloy material for automobile exterior trimming parts. The alloy material is applied to the automobile exterior trimming parts. Comprising the following components: the difference value between the melt index of the PC resin at 300 DEG C / 1.2 kg and the melt index of the POK resin at 240 DEG C / 1.2 kg is 0.5 g / 10min to 5g / 10min; the preparation method of the compatilizer comprises the following steps: carrying out melt extrusion granulation on 90-98 parts by mass of POK resin, 2-8 parts by mass of glycidyl methacrylate GMA, 0.1-0.5 part by mass of peroxide initiator and 5-7 parts by mass of ionic liquid to obtain the compatilizer; the ionic liquid is selected from at least one of 1-hexyl-3-methylimidazole hydrogen sulfate, 1-butyl-3-methylimidazole hydrogen sulfate, 1-methylimidazole hydrogen sulfate and 1-hexyl-2, 3, 5-trimethyl pyrazole hydrogen sulfate, and the ionic liquid is selected from at least one of 1-hexyl-3-methylimidazole hydrogen sulfate, 1-butyl-3-methylimidazole hydrogen sulfate, 1-methylimidazole hydrogen sulfate and 1-hexyl-2, 3, 5-trimethyl pyrazole hydrogen sulfate; the alloy material is obtained by melt extrusion, strip drawing and granulation of all the components through a double-screw extruder. The prepared alloy material has the advantages of high strength, high impact, excellent weather resistance, heat resistance, chemical resistance and heat release.

Description

Technical Field

[0001] The invention relates to the field of polymer technology, and in particular to an alloy material for automobile exterior trims. Background Art

[0002] Polycarbonate (hereinafter referred to as PC) is a non-crystalline high molecular polymer with excellent properties such as high impact, excellent weather resistance, and V2 flame retardancy. It is widely used in automotive exterior parts. Its disadvantages are: because the PC molecular chain contains benzene rings, the movement of the molecular chain is hindered and it is not easy to arrange regularly. Its products are prone to internal stress and cracking. The surface hardness of PC is low, and its pencil hardness is less than HB grade. The surface of the product is easily scratched. Because PC contains ester groups in the molecule, it is very easy to hydrolyze at high temperature.

[0003] Polyethylene terephthalate (PET) is a semi-crystalline polymer with high temperature resistance, creep resistance, fatigue resistance, good weather resistance, etc. It has good tolerance to weak acids, weak bases, salts, organic solvents and other chemicals and is not easily corroded. Disadvantages: low impact strength, contains ester groups, and is easily hydrolyzed.

[0004] Polyketone (POK) is a highly crystalline polymer and a new type of green polymer material synthesized from carbon monoxide and olefins (ethylene, propylene). It has high wear resistance, hydrolysis resistance, excellent chemical resistance, excellent fluidity and molding processability. Disadvantages: heat resistance and rigidity (flexural modulus: 1800MPa) are relatively low.

[0005] With the advancement of technology and the demand for special product functions, such as car door handles and car spoilers, the requirements for materials are becoming more and more stringent. In addition to the common injection molding method, gas-assisted molding can currently achieve dimensional stability for such products. However, gas-assisted molding products have very strict requirements on materials. Single polymer resins have different defects and cannot achieve gas-assisted molding well. Summary of the invention

[0006] The purpose of the present invention is to provide an alloy material for automobile exterior parts, which is easy to process and has the excellent properties of high strength, high impact, excellent weather resistance, heat resistance and chemical resistance, and can be used in the production of automobile exterior parts.

[0007] In order to achieve the above-mentioned object, the first aspect of the present invention provides an alloy material for automobile exterior parts, wherein the alloy material is applied to automobile exterior parts, and the alloy material comprises the following components: PC resin, PET resin, POK resin and a compatibilizer;

[0008] The difference between the melt index of the PC resin at 300°C / 1.2kg and the melt index of the POK resin at 240°C / 1.2kg is 0.5g / 10min-5g / 10min;

[0009] The preparation method of the compatibilizer comprises: melt-extruding and granulating 90-98 parts by weight of POK resin, 2-8 parts by weight of glycidyl methacrylate GMA, 0.1-0.5 parts by weight of peroxide initiator, and 5-7 parts by weight of ionic liquid to obtain the compatibilizer;

[0010] The ionic liquid is selected from at least one of 1-hexyl-3-methylimidazole hydrogen sulfate, 1-butyl-3-methylimidazole hydrogen sulfate, 1-methylimidazole hydrogen sulfate and 1-hexyl-2,3,5-trimethylpyrazole hydrogen sulfate; the alloy material is obtained by melt-extruding, drawing and granulating the components through a twin-screw extruder.

[0011] In one embodiment, the ratio of each component is: the weight ratio of PC resin to PET resin is 1: (0.08-0.35); the weight ratio of PC resin to POK resin is 1: (0.08-0.35); preferably,

[0012] The weight ratio of the PC resin to the PET resin is 1:(0.10-0.22);

[0013] The weight ratio of the PC resin to the POK resin is 1:(0.10-0.22);

[0014] The weight ratio of the PC resin to the compatibilizer is 1:(0.01-0.10).

[0015] In one embodiment,

[0016] The PC resin has a melt index of 5 g / 10 min-15 g / 10 min at 300° C. / 1.2 kg; the POK resin has a melt index of 5 g / 10 min-60 g / 10 min at 240° C. / 1.2 kg;

[0017] In one embodiment,

[0018] The PC resin has a melting index of 5 g / 10 min-10 g / 10 min at 300° C. / 1.2 kg; and the POK resin has a melting index of 5 g / 10 min-10 g / 10 min at 240° C. / 1.2 kg.

[0019] In one embodiment, the intrinsic viscosity of the PET resin is 0.8 dl / g-1.2 dl / g.

[0020] In one embodiment,

[0021] The alloy material further includes an antioxidant; based on 100 parts by weight of the alloy material, the antioxidant accounts for 0.2 parts to 2.0 parts;

[0022] In one embodiment,

[0023] The antioxidant includes a primary antioxidant and a secondary antioxidant, wherein the primary antioxidant is selected from 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate and / or pentaerythritol tetrakis[methyl-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate;

[0024] The auxiliary antioxidant is selected from tris[2,4-di-tert-butylphenyl]phosphite and tetrakis(2,4-di-tert-butylphenyl-4,4'-biphenyl)bisphosphonate.

[0025] In one embodiment, the alloy material further includes a lubricant; based on 100 parts by weight of the alloy material, the lubricant accounts for 0.2 parts to 2.0 parts;

[0026] The lubricant comprises at least one of pentaerythritol stearate, N,N'-ethylenebisstearamide, ethylene acrylic acid copolymerized metal salt ionomer and stearic acid erucamide.

[0027] On the other hand, the present application provides an automobile exterior trim, wherein the material of the automobile exterior trim is the alloy material described above.

[0028] In one embodiment, the automobile exterior trim includes an automobile door handle and an automobile rear wing.

[0029] Compared with the prior art, the present invention has at least the following beneficial effects:

[0030] The invention introduces a specific ratio of PC resin, PET resin and POK resin into the alloy material for automobile exterior parts and alloys them in the presence of a compatibilizer. The alloy material provided can improve the stress cracking defect of a single PC, improve the hydrolysis resistance of PC and PET, and has high strength, high impact, excellent weather resistance, heat resistance and chemical resistance. It adopts high-viscosity raw materials for modification and processing, and can be used in the production of automobile exterior parts, especially suitable for the manufacture and production of gas-assisted molding and blow molding products, such as automobile door handles, automobile tail wings, etc. DETAILED DESCRIPTION

[0031] The specific implementation of the present invention is described in detail below. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and does not represent or limit the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

[0032] The first aspect of the present invention provides an alloy material for automobile exterior parts, the alloy material is applied to automobile exterior parts, and the alloy material comprises the following components: PC resin, PET resin, POK resin and a compatibilizer; wherein the weight ratio of the PC resin to the PET resin is 1:(0.08-0.35); the weight ratio of the PC resin to the POK resin is 1:(0.08-0.35); the preparation method of the compatibilizer comprises: melt-extruding and granulating 80-98 parts by weight of POK resin, 2-20 parts by weight of glycidyl methacrylate (GMA), 0.05-0.1 parts by weight of peroxide initiator and 0-10 parts by weight of ionic liquid to obtain the compatibilizer; the alloy material is obtained by melt-extruding, pulling and granulating the components through a twin-screw extruder.

[0033] In the present invention, by introducing a specific ratio of PC resin, PET resin and POK resin and alloying them in the presence of a compatibilizer, the alloy material prepared by the alloy material can have the advantages of high strength, high impact, excellent weather resistance, heat resistance and chemical resistance while retaining the respective advantages of PC resin, PET resin and POK resin.

[0034] In the present invention, the weight ratios of PC resin to PET resin that can be listed are 1:0.10, 1:0.11, 1:0.12, 1:0.13, 1:0.15, 1:0.18, 1:0.21, 1:0.22, 1:0.26, 1:0.28, 1:30, 1:0.33, and 1:0.35. Other unlisted specific ratios within this ratio range are also applicable, and the range composed of any two specific ratios is also applicable.

[0035] In the present invention, the weight ratio of PC resin to POK resin that can be listed is 1:0.10, 1:0.11, 1:0.12, 1:0.13, 1:0.15, 1:0.18, 1:0.21, 1:0.22, 1:0.26, 1:0.28, 1:30, 1:0.33, and 1:0.35. Other unlisted specific ratios within this ratio range are also applicable, and the range composed of any two specific ratios is also applicable.

[0036] As a preferred embodiment of the present invention, the weight ratio of the PC resin to the PET resin is 1:(0.10-0.22); the weight ratio of the PC resin to the POK resin is 1:(0.10-0.22); and the weight ratio of the PC resin to the compatibilizer is 1:(0.01-0.10).

[0037] In the present invention, the weight ratio of PC resin to compatibilizer that can be listed are 1:0.01, 1:0.02, 1:0.03, 1:0.04, 1:0.05, 1:0.06, 1:0.07, 1:0.08, 1:0.09, 1:0.10, preferably 1:(0.03-0.08), and other unlisted specific ratios within this ratio range are also applicable, and the range composed of any two specific ratios is also applicable.

[0038] In the present invention, the inventors have found through a large number of research and development experiments that if the amount of PC resin is too little, the strength of the product will decrease; if the amount of PET resin is too much, the material fluidity is high, which is not conducive to gas-assisted molding; if the amount is too little, the product is prone to stress cracking during painting; if the amount of POK resin is too much, the rigidity of the product will decrease; if the amount is too little, the hydrolysis resistance of the product will deteriorate. That is, in the present invention, by controlling a specific proportion of PC resin, PET resin, POK resin and compatibilizer, the comprehensive mechanical properties of the PC / PET / POK alloy material can be optimized. This may be because the compatibilizer can serve as a sea component, and the PET resin, POK resin and compatibilizer together serve as island components to form an island component dispersed in the sea component as a continuous phase. The special proportions of the components have a better synergistic toughening effect on multiple segments. Therefore, the toughness of the material can be greatly improved while ensuring the strength, and the compatibilizer makes the PC resin, PET resin and POK resin have good compatibility, which is beneficial to improving the heat resistance and chemical resistance of the material.

[0039] As a preferred embodiment of the present invention, the difference between the melt index of the PC resin at 300°C / 1.2kg and the melt index of the POK resin at 240°C / 1.2kg is 0g / 10min-45g / 10min, for example, 0g / 10min, 0.5g / 10min, 0.6g / 10min, 0.9g / 10min, 1.0g / 10min, 1.5g / 10min, 3g / 10min, 5g / 10min, 8g / 10min, 10g / 10min, 15g / 10min, 25g / 10min, 30g / 10min, 40g / 10min, 45g / 10min in, other specific values ​​not listed in this numerical range are also applicable, and the range composed of any two specific values ​​is also applicable; the melt index of the PC resin at 300°C / 1.2kg is 5g / 10min-15g / 10min, for example, 5g / 10min, 6.5g / 10min, 8g / 10min, 12g / 10min, 15g / 10min, other specific values ​​not listed in this numerical range are also applicable, and the range composed of any two specific values ​​is also applicable; the melt index of the POK resin at 240°C / 1.2kg is 5g / 10min-60g / 10min, for example, 5g / 10min 5.6g / 10min, 6g / 10min, 10g / 10min, 20g / 10min, 30g / 10min, 40g / 10min, 50g / 10min, 60g / 10min, other specific values ​​not listed in this numerical range are also applicable, and the range composed of any two specific values ​​is also applicable; the intrinsic viscosity of the PET resin is 0.8dl / g-1.2dl / g, 0.8dl / g, 0.9dl / g, 1.0dl / g, 1.2dl / g, other specific values ​​not listed in this numerical range are also applicable, and the range composed of any two specific values ​​is also applicable.

[0040] As a preferred embodiment of the present invention, the difference between the melt index of the PC resin at 300°C / 1.2kg and the melt index of the POK resin at 240°C / 1.2kg is 0.5g / 10min-5g / 10min; as a preferred embodiment of the present invention, the melt index of the PC resin at 300°C / 1.2kg is 5g / 10min-10g / 10min; the melt index of the POK resin at 240°C / 1.2kg is 5g / 10min-10g / 10min.

[0041] The melt index in the present invention is obtained by referring to the ISO113 standard test; the intrinsic viscosity is obtained by referring to the ASTMD-4603 standard test.

[0042] The PC resin, POK resin and PET resin in the present invention can be obtained from the market. For example, the brand of PC resin is ET3113, its melt index at 300℃ / 1.2kg is 6.5g / 10min; for example, the brand of POK resin is CH-610 produced by Shanghai Yuanfang, and its intrinsic viscosity is 0.800±0.015dl / g; for example, the brand of POK resin is M630A produced by Korea Hyosung, and its melt index at 240℃ / 1.2kg is 5.6g / 10min.

[0043] In the present invention, the inventor unexpectedly discovered that the use of specific PC resin, PET resin, and POK resin can not only increase the mechanical properties of the alloy material in a balanced manner, but also increase the light transmittance of the alloy material. On the one hand, this may be because under the action of a specific compatibilizer, during the alloying process, the PC resin can prevent the crystallization of the POK resin and the PET resin or further refine their grains, thereby making the PC / PET / POK alloy material have better transparency; on the other hand, this may be because when the difference in the melt index of the PC resin and the POK resin is within a specific range, during the alloying process, the components in the system have good fluidity and the fluidity between the components is similar, ultimately forming an alloy material with excellent mechanical properties and high light transmittance.

[0044] As a more preferred technical solution of the present invention, the preparation method of the compatibilizer includes: melt-extruding and granulating 90-98 parts by mass of POK resin, 2-8 parts by mass of glycidyl methacrylate (GMA), 0.1-0.5 parts by mass of peroxide initiator, and 5-7 parts by mass of ionic liquid to obtain the compatibilizer.

[0045] In the present invention, the inventors found that the use of POK-g-GMA can better increase the comprehensive mechanical properties, hydrolysis resistance and light transmittance of the alloy material. This may be because the GMA functional group can react with the ester group to cap the ester group, which greatly improves the hydrolysis resistance of the material. In addition, it has a POK main chain. While increasing the compatibility of PC with PET and POK, PC can better block the crystalline segments of PET and POK. Its own short chain segments can also block the crystalline segments of PET and POK to a certain extent, thereby increasing the light transmittance of the material.

[0046] In the present invention, the type of peroxide initiator is not particularly limited, and it can be a conventional peroxide initiator in the art. In the present invention, dicumyl peroxide is used as an example to illustrate the advantages of the present invention, but the present invention is not limited thereto.

[0047] As a more preferred technical solution of the present invention, when preparing the compatibilizer, the resin used is the same as the PC resin in the alloy material, which further increases the transparency of the synthetic material.

[0048] As a more preferred technical solution of the present invention, the ionic liquid is selected from at least one of 1-hexyl-3-methylimidazolium hydrogen sulfate, 1-butyl-3-methylimidazolium hydrogen sulfate, 1-methylimidazolium hydrogen sulfate and 1-hexyl-2,3,5-trimethylpyrazole hydrogen sulfate, preferably 1-butyl-3-methylimidazolium hydrogen sulfate.

[0049] In the present invention, the inventors have found through experiments that the compatibilizer prepared by adding a specific ionic liquid when preparing the compatibilizer can not only increase the light transmittance of the alloy material, but also increase the moisture and heat resistance and mechanical properties of the alloy material at the same time. This may be because 1-butyl-3-methylimidazole hydrogen sulfate can promote ester exchange in the system and further improve the compatibility of the alloy material. However, the inventors have found that too much ionic liquid should not be added, otherwise the melt index of the prepared material will be too large, which is not conducive to the processing and production of gas-assisted molding.

[0050] As a more preferred technical solution of the present invention, in the case of a compatibilizer, the conditions for melt extrusion include: melt extrusion through a twin-screw extruder, preferably the temperature range of each section of the twin-screw extruder is: 200℃-220℃, 210℃-230℃, 230℃-260℃, 230℃-260℃, 230℃-260℃, 220℃-250℃, 220℃-250℃, 210℃-230℃, 210℃-230℃, die head temperature 230℃-260℃; the twin screw speed of the twin screw extruder is 350r / min-450r / min.

[0051] In the present invention, the set temperature of each section of the twin-screw extruder is a fixed value, but due to the reaction or the equipment itself, the temperature is generally a range value.

[0052] In the present invention, some auxiliary ingredients may be added to the alloy material as required.

[0053] As a preferred technical solution of the present invention, the alloy material also includes an antioxidant.

[0054] In the present invention, the antioxidant can effectively inhibit the degradation and deterioration of the material due to heat during processing and use, so as to make the processing smooth and extend the service life of the plastic part.

[0055] In the present invention, the antioxidant may be a conventional antioxidant in the art, and its specific type is not particularly limited. Preferably, the antioxidant includes a primary antioxidant and a secondary antioxidant, wherein the primary antioxidant is selected from 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate n-octadecyl alcohol ester and / or tetrakis[methyl-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, and the secondary antioxidant is selected from tris[2.4-di-tert-butylphenyl] phosphite and tetrakis(2,4-di-tert-butylphenyl-4,4'-biphenyl) bisphosphonate. When the primary antioxidant and the secondary antioxidant are used simultaneously, the ratio of the two is not particularly limited, and is generally 1:1.

[0056] As a preferred technical solution of the present invention, the alloy material further includes a lubricant; based on 100 parts by weight of the alloy material, the lubricant accounts for 0.2 parts to 2.0 parts;

[0057] The lubricant comprises at least one of pentaerythritol stearate (PETS), N,N'-ethylenebisstearamide (EBS), metal salt ionomer of ethylene acrylic acid copolymer and stearic acid erucamide.

[0058] In the present invention, there is no special restriction on the type of lubricant. A single lubricant can be used alone, or two or more lubricants can be used simultaneously. For example, the lubricant is N, N'-ethylenebisstearamide and stearic acid erucamide in a weight ratio of 1:1; for example, the lubricant is pentaerythritol stearate (PETS) and metal salt ionomer in a weight ratio of 1:1.

[0059] The specific dispersants in the present invention are all commercially available.

[0060] The second aspect of the present invention provides a method for preparing a gas-assisted molding PC / PET / POK alloy material, which comprises: mixing the components of the alloy material described in the present invention, melt-extruding the mixed material through a twin-screw extruder, pulling strips, and granulating to obtain a PC / PET / POK alloy material.

[0061] As a preferred technical solution of the present invention, the mixing conditions include: a rotation speed of 80r / min-120r / min, for example, 80r / min, 90r / min, 100r / min, 110r / min or 120r / min; stirring for 15min-20min, for example, 15min, 16min, 17min, 18min, 19min, 20min, and other specific values ​​not listed in the numerical range are also applicable, and the range composed of any two specific values ​​is also applicable.

[0062] In the present invention, the material is melted, mixed and sheared in a twin-screw extruder and then extruded by the twin-screw extruder. As a preferred technical solution of the present invention, the screw diameter of the twin-screw extruder is 40 mm and the aspect ratio L / D is 44.

[0063] As a preferred technical solution of the present invention, the conditions for melt extrusion include: the temperatures of the twin-screw extruder from the feeding port to the die outlet are 200℃-220℃, 210℃-230℃, 230℃-260℃, 230℃-260℃, 230℃-260℃, 220℃-250℃, 220℃-250℃, 210℃-230℃, 210℃-230℃, and the die head temperature is 230℃-260℃; the twin screw speed of the twin screw extruder is 350r / min-450r / min.

[0064] The present invention will be described in detail below through examples.

[0065] The preparation method of POK-g-GMA (homemade) in the following embodiment is as follows: POK (M630A, Hyosung, South Korea, with a melt index of 5.6 g / 10 min at 240°C / 1.2kg), 94.5 parts by mass, peroxide (DCP) by mass, and GMA5.5 parts by mass are reacted and extruded through a twin-screw extruder, and the temperatures of each section of the extruder are: 200°C-220°C, 210°C-230°C, 230°C-260°C, 230°C-260°C, 230°C-260°C, 220°C-250°C, 220°C-250°C, 210°C-230°C, 210°C-230°C, and the die head temperature is 230°C-260°C; the twin screw speed of the twin screw extruder is 400r / min.

[0066] In the following examples, the preparation method of PET-g-GMA (homemade) is as follows: 94.5 parts by mass of PET (CH-610, Shanghai Yuanfang, with an intrinsic viscosity of 0.800±0.015 dl / g), 0.3 parts by mass of peroxide (DCP), and 5.5 parts by mass of GMA are reacted and extruded through a twin-screw extruder, and the temperatures of each section of the extruder are: 200°C-220°C, 210°C-230°C, 230°C-260°C, 230°C-260°C, 230°C-260°C, 220°C-250°C, 220°C-250°C, 210°C-230°C, 210°C-230°C, and the die head temperature is 230°C-260°C; the twin screw speed of the twin screw extruder is 400r / min.

[0067] In the following examples, the preparation method of POK-g-GMA / ionic liquid A (self-made) is as follows: POK (M630A, Hyosung, South Korea, with a melt index of 5.6 g / 10 min at 240°C / 1.2 kg), 94.5 parts by mass, peroxide (DCP) by mass, GMA5.5 parts by mass and 6 parts of 1-butyl-3-methylimidazole hydrogen sulfate are reacted and extruded through a twin-screw extruder, and the temperatures of each section of the extruder are: 200°C-220°C, 210°C-230°C, 230°C-260°C, 230°C-260°C, 230°C-260°C, 220°C-250°C, 220°C-250°C, 210°C-230°C, 210°C-230°C, and the die head temperature is 230°C-260°C; the twin screw speed of the twin screw extruder is 400r / min.

[0068] In the following examples, the preparation method of POK-g-GMA / ionic liquid B (self-made) is as follows: POK (M630A, Hyosung, South Korea, with a melt index of 5.6 g / 10 min at 240°C / 1.2 kg), 94.5 parts by mass, peroxide (DCP) by mass, GMA5.5 parts by mass and 12 parts by mass of 1-butyl-3-methylimidazole hydrogen sulfate are reacted and extruded through a twin-screw extruder, and the temperatures of each section of the extruder are: 200°C-220°C, 210°C-230°C, 230°C-260°C, 230°C-260°C, 230°C-260°C, 220°C-250°C, 220°C-250°C, 210°C-230°C, 210°C-230°C, and the die head temperature is 230°C-260°C; the twin screw speed of the twin screw extruder is 400r / min.

[0069] Example 1

[0070] This embodiment provides a PC / PET / POK alloy material capable of gas-assisted molding and a preparation method thereof. The raw material composition of the alloy material is as follows, by weight: PC resin is ET3113 (covestro, the melt index at 300℃ / 1.2kg is 6.5g / 10min): 76 parts; PET resin is CH-610 (Shanghai Yuanfang, the intrinsic viscosity is 0.800±0.015dl / g): 10 parts; POK resin is M630A (Korea Hyosung, the melt index at 240℃ / 1.2kg is 5.6g / 10min): 10 parts; compatibilizer POK-g-GMA (self-made): 3 parts; antioxidant 1076 (BASF) and antioxidant P-EPQ (BASF) (combined in a weight ratio of 1:1): 0.6 parts; lubricant PETS (Yite) and ethylene acrylic acid copolymer metal salt ionomer A-C540 (Honeywell) (combined in a weight ratio of 1:1): 0.4 parts.

[0071] Add the formulated raw materials into the mixer and mix at 100r / min for 15min, then melt the evenly mixed materials through a twin-screw, mix and shear, extrude, pull and pelletize from the die head to obtain a PC / PET / POK alloy material that can be gas-assisted molded. Among them, the temperatures of each section of the extruder are: 200℃-220℃, 210℃-230℃, 230℃-260℃, 230℃-260℃, 230℃-260℃, 220℃-250℃, 220℃-250℃, 210℃-230℃, 210℃-230℃, and the die head temperature is 230℃-260℃; the twin screw speed of the twin screw extruder is 400r / min.

[0072] Example 2

[0073] This embodiment provides a PC / PET / POK alloy material capable of gas-assisted molding and a preparation method thereof. The raw material composition of the alloy material is as follows, by weight: PC resin is ET3113 (covestro, the melt index at 300℃ / 1.2kg is 6.5g / 10min): 73 parts; PET resin is CH-610 (Shanghai Yuanfang, the intrinsic viscosity is 0.800±0.015dl / g): 8 parts; POK resin is M630A (Korea Hyosung, the melt index at 240℃ / 1.2kg is 5.6g / 10min): 15 parts; compatibilizer POK-g-GMA (self-made): 3 parts; antioxidant 1010 (BASF) and antioxidant 168 (BASF) (combined in a weight ratio of 1:1): 0.6 parts; lubricant PETS (Yite) and ethylene acrylic acid copolymer metal salt ionomer A-C540 (Honeywell) (combined in a weight ratio of 1:1): 0.4 parts.

[0074] Add the formulated raw materials into the mixer and mix at 100r / min for 15min, then melt the evenly mixed materials through a twin-screw, mix and shear, extrude, pull and pelletize from the die head to obtain a PC / PET / POK alloy material that can be gas-assisted molded. Among them, the temperatures of each section of the extruder are: 200℃-220℃, 210℃-230℃, 230℃-260℃, 230℃-260℃, 230℃-260℃, 220℃-250℃, 220℃-250℃, 210℃-230℃, 210℃-230℃, and the die head temperature is 230℃-260℃; the twin screw speed of the twin screw extruder is 400r / min.

[0075] Example 3

[0076] This embodiment provides a PC / PET / POK alloy material capable of gas-assisted molding and a preparation method thereof. The raw material composition of the alloy material is as follows, by weight: PC resin is ET3113 (covestro, melt index at 300℃ / 1.2kg is 6.5g / 10min): 69 parts; PET resin is CH-610 (Shanghai Yuanfang, intrinsic viscosity is 0.800±0.015dl / g): 15 parts; POK resin is M630A (Korea Hyosung, melt index at 240℃ / 1.2kg is 5.6g / 10min): 10 parts; compatibilizer POK-g-GMA (self-made): 5 parts; antioxidant 1010 (BASF) and antioxidant 168 (BASF) (combined in a weight ratio of 1:1): 0.6 parts; lubricant PETS (Yite) and ethylene acrylic acid copolymer metal salt ionomer A-C540 (Honeywell) (combined in a weight ratio of 1:1): 0.4 parts.

[0077] Add the formulated raw materials into the mixer and mix at 100r / min for 15min, then melt and shear the mixed materials through a twin screw, extrude, pull and pelletize them through a die head to obtain a PC / PET / POK alloy material that can be gas-assisted molded. The temperature setting of each section of the extruder temperature is: 200℃-220℃, 210℃-230℃, 230℃-260℃, 230℃-260℃, 230℃-260℃, 220℃-250℃, 220℃-250℃, 210℃-230℃, 210℃-230℃, and the die head temperature is 230℃-260℃; the twin screw speed of the twin screw extruder is 400r / min.

[0078] Example 4

[0079] This embodiment provides a PC / PET / POK alloy material capable of gas-assisted molding and a preparation method thereof. The raw material composition of the alloy material is as follows, by weight: PC resin is ET3113 (covestro, melt index at 300℃ / 1.2kg is 6.5g / 10min): 76 parts; PET resin is CH-610 (Shanghai Yuanfang, intrinsic viscosity is 0.800±0.015dl / g): 10 parts; POK resin is M630A (Korea Hyosung, melt index at 240℃ / 1.2kg is 5.6g / 10min): 10 parts; compatibilizer MBS E920 (SK): 3 parts; antioxidant 1076 (BASF) and antioxidant P-EPQ (BASF) (combined in a weight ratio of 1:1): 0.6 parts; lubricant PETS (Yite) and ethylene acrylic acid copolymer metal salt ionomer A-C540 (Honeywell) (combined in a weight ratio of 1:1): 0.4 parts.

[0080] Add the formulated raw materials into the mixer and mix at 100r / min for 15min, then melt the evenly mixed materials through a twin-screw, mix and shear, extrude, pull and pelletize from the die head to obtain a PC / PET / POK alloy material that can be gas-assisted molded. Among them, the temperatures of each section of the extruder are: 200℃-220℃, 210℃-230℃, 230℃-260℃, 230℃-260℃, 230℃-260℃, 220℃-250℃, 220℃-250℃, 210℃-230℃, 210℃-230℃, and the die head temperature is 230℃-260℃; the twin screw speed of the twin screw extruder is 400r / min.

[0081] Example 5

[0082] This embodiment provides a PC / PET / POK alloy material capable of gas-assisted molding and a preparation method thereof. The raw material composition of the alloy material is as follows, by weight: PC 2558 / Covestro (melt index at 300℃ / 1.2kg is 15.5g / 10min): 76 parts; PET resin is CH-610 (Shanghai Yuanfang, intrinsic viscosity is 0.800±0.015dl / g): 10 parts; POK resin is M630A (Korea Hyosung, melt index at 240℃ / 1.2kg is 5.6g / 10min): 10 parts; compatibilizer POK-g-GMA (self-made): 3 parts; antioxidant 1076 (BASF) and antioxidant P-EPQ (BASF) (combined in a weight ratio of 1:1): 0.6 parts; lubricant PETS (Yite) and ethylene acrylic acid copolymer metal salt ionomer A-C540 (Honeywell) (combined in a weight ratio of 1:1): 0.4 parts.

[0083] Add the formulated raw materials into the mixer and mix at 100r / min for 15min, then melt the evenly mixed materials through a twin-screw, mix and shear, extrude, pull and pelletize from the die head to obtain a PC / PET / POK alloy material that can be gas-assisted molded. Among them, the temperatures of each section of the extruder are: 200℃-220℃, 210℃-230℃, 230℃-260℃, 230℃-260℃, 230℃-260℃, 220℃-250℃, 220℃-250℃, 210℃-230℃, 210℃-230℃, and the die head temperature is 230℃-260℃; the twin screw speed of the twin screw extruder is 400r / min.

[0084] Example 6

[0085] This embodiment provides a PC / PET / POK alloy material capable of gas-assisted molding and a preparation method thereof. The raw material composition of the alloy material is as follows, by weight: PC resin is ET3113 (covestro, melt index at 300℃ / 1.2kg is 6.5g / 10min): 76 parts; PET resin is CH-610 (Shanghai Yuanfang, intrinsic viscosity is 0.800±0.015dl / g): 10 parts; POK resin is M930F (Korea Hyosung, melt index at 240℃ / 1.2kg is 60g / 10min): 10 parts; compatibilizer POK-g-GMA (self-made): 3 parts; antioxidant 1076 (BASF) and antioxidant P-EPQ (BASF) (combined in a weight ratio of 1:1): 0.6 parts; lubricant PETS (Yite) and ethylene acrylic acid copolymer metal salt ionomer A-C540 (Honeywell) (combined in a weight ratio of 1:1): 0.4 parts.

[0086] Add the formulated raw materials into the mixer and mix at 100r / min for 15min, then melt the evenly mixed materials through a twin-screw, mix and shear, extrude, pull and pelletize from the die head to obtain a PC / PET / POK alloy material that can be gas-assisted molded. Among them, the temperatures of each section of the extruder are: 200℃-220℃, 210℃-230℃, 230℃-260℃, 230℃-260℃, 230℃-260℃, 220℃-250℃, 220℃-250℃, 210℃-230℃, 210℃-230℃, and the die head temperature is 230℃-260℃; the twin screw speed of the twin screw extruder is 400r / min.

[0087] Example 7

[0088] This embodiment provides a PC / PET / POK alloy material capable of gas-assisted molding and a preparation method thereof. The raw material composition of the alloy material is as follows, by weight: PC resin is ET3113 (covestro, melt index at 300℃ / 1.2kg is 6.5g / 10min): 76 parts; PET resin is CH-610 (Shanghai Yuanfang, intrinsic viscosity is 0.800±0.015dl / g): 10 parts; POK resin is M630A (Korea Hyosung, melt index at 240℃ / 1.2kg is 5.6g / 10min): 10 parts; POK-g-GMA / ionic liquid A (self-made): 3 parts; antioxidant 1076 (BASF) and antioxidant P-EPQ (BASF) (combined in a weight ratio of 1:1): 0.6 parts; lubricant PETS (Yite) and ethylene acrylic acid copolymer metal salt ionomer A-C540 (Honeywell) (combined in a weight ratio of 1:1): 0.4 parts.

[0089] Add the formulated raw materials into the mixer and mix at 100r / min for 15min, then melt the evenly mixed materials through a twin-screw, mix and shear, extrude, pull and pelletize from the die head to obtain a PC / PET / POK alloy material that can be gas-assisted molded. Among them, the temperatures of each section of the extruder are: 200℃-220℃, 210℃-230℃, 230℃-260℃, 230℃-260℃, 230℃-260℃, 220℃-250℃, 220℃-250℃, 210℃-230℃, 210℃-230℃, and the die head temperature is 230℃-260℃; the twin screw speed of the twin screw extruder is 400r / min.

[0090] Example 8

[0091] This embodiment provides a PC / PET / POK alloy material capable of gas-assisted molding and a preparation method thereof. The raw material composition of the alloy material is as follows, by weight: PC resin is ET3113 (covestro, melt index at 300℃ / 1.2kg is 6.5g / 10min): 73 parts; PET resin is CH-610 (Shanghai Yuanfang, intrinsic viscosity is 0.800±0.015dl / g): 8 parts; POK resin is M630A (Korea Hyosung, melt index at 240℃ / 1.2kg is 5.6g / 10min): 15 parts; compatibilizer, POK-g-GMA / ionic liquid A (self-made): 3 parts; antioxidant 1010 (BASF) and antioxidant 168 (BASF) (combined in a weight ratio of 1:1): 0.6 parts; lubricant PETS (Yite) and ethylene acrylic acid copolymer metal salt ionomer A-C540 (Honeywell) (combined in a weight ratio of 1:1): 0.4 parts.

[0092] Add the formulated raw materials into the mixer and mix at 100r / min for 15min, then melt the evenly mixed materials through a twin-screw, mix and shear, extrude, pull and pelletize from the die head to obtain a PC / PET / POK alloy material that can be gas-assisted molded. Among them, the temperatures of each section of the extruder are: 200℃-220℃, 210℃-230℃, 230℃-260℃, 230℃-260℃, 230℃-260℃, 220℃-250℃, 220℃-250℃, 210℃-230℃, 210℃-230℃, and the die head temperature is 230℃-260℃; the twin screw speed of the twin screw extruder is 400r / min.

[0093] Example 9

[0094] This embodiment provides a PC / PET / POK alloy material capable of gas-assisted molding and a preparation method thereof. The raw material composition of the alloy material is as follows, by weight: PC resin is ET3113 (covestro, melt index at 300℃ / 1.2kg is 6.5g / 10min): 76 parts; PET resin is CH-610 (Shanghai Yuanfang, intrinsic viscosity is 0.800±0.015dl / g): 10 parts; POK resin is M630A (Korea Hyosung, melt index at 240℃ / 1.2kg is 5.6g / 10min): 10 parts; POK-g-GMA / ionic liquid B (self-made): 3 parts; antioxidant 1076 (BASF) and antioxidant P-EPQ (BASF) (combined in a weight ratio of 1:1): 0.6 parts; lubricant PETS (Yite) and ethylene acrylic acid copolymer metal salt ionomer A-C540 (Honeywell) (combined in a weight ratio of 1:1): 0.4 parts.

[0095] Add the formulated raw materials into the mixer and mix at 100r / min for 15min, then melt the evenly mixed materials through a twin-screw, mix and shear, extrude, pull and pelletize from the die head to obtain a PC / PET / POK alloy material that can be gas-assisted molded. Among them, the temperatures of each section of the extruder are: 200℃-220℃, 210℃-230℃, 230℃-260℃, 230℃-260℃, 230℃-260℃, 220℃-250℃, 220℃-250℃, 210℃-230℃, 210℃-230℃, and the die head temperature is 230℃-260℃; the twin screw speed of the twin screw extruder is 400r / min.

[0096] Comparative Example 1

[0097] This comparative example 1 provides a PC / PET / POK alloy material capable of gas-assisted molding and a preparation method thereof. The raw material composition of the alloy material is as follows: PC is ET3113 (covestro, the melt index at 300℃ / 1.2kg is 6.5g / 10min): 61 parts; PET resin is CH-610 (Shanghai Yuanfang, the intrinsic viscosity is 0.800±0.015dl / g): 8 parts; POK resin is M630A (Korea Hyosung, the melt index at 240℃ / 1.2kg is 5.6g / 10min): 25 parts; compatibilizer POK-g-GMA (self-made): 5 parts; antioxidant 1076 (BASF) and antioxidant P-EPQ (BASF) (combined in a weight ratio of 1:1): 0.6 parts; lubricant PETS (Yite) and ethylene acrylic acid copolymer metal salt ionomer A-C540 (Honeywell) (combined in a weight ratio of 1:1): 0.4 parts.

[0098] Add the formulated raw materials into the mixer and mix at 100r / min for 15min, then melt and shear the mixed materials through a twin screw, extrude, pull and pelletize them through a die head to obtain a PC / PET / POK alloy material that can be gas-assisted molded. The temperature setting of each section of the extruder temperature is: 200℃-220℃, 210℃-230℃, 230℃-260℃, 230℃-260℃, 230℃-260℃, 220℃-250℃, 220℃-250℃, 210℃-230℃, 210℃-230℃, and the die head temperature is 230℃-260℃; the twin screw speed of the twin screw extruder is 400r / min.

[0099] Comparative Example 2

[0100] This comparative example 1 provides a PC / PET / POK alloy material capable of gas-assisted molding and a preparation method thereof. The raw material composition of the alloy material is as follows: PC resin is ET3113 (covestro, the melt index at 300℃ / 1.2kg is 6.5g / 10min): 61 parts; PET resin is CH-610 (Shanghai Yuanfang, the intrinsic viscosity is 0.800±0.015dl / g): 25 parts; POK resin is M630A (Korea Hyosung, the melt index at 240℃ / 1.2kg is 5.6g / 10min): 10 parts; compatibilizer POK-g-GMA (self-made): 3 parts; antioxidant 1010 (BASF) and antioxidant 168 (BASF) (combined in a weight ratio of 1:1): 0.6 parts; lubricant PETS (Yite) and ethylene acrylic acid copolymer metal salt ionomer A-C540 (Honeywell) (combined in a weight ratio of 1:1): 0.4 parts.

[0101] Add the formulated raw materials into the mixer and mix at 100r / min for 15min, then melt and shear the mixed materials through a twin screw, extrude, pull and pelletize them through a die head to obtain a PC / PET / POK alloy material that can be gas-assisted molded. The temperature setting of each section of the extruder temperature is: 200℃-220℃, 210℃-230℃, 230℃-260℃, 230℃-260℃, 230℃-260℃, 220℃-250℃, 220℃-250℃, 210℃-230℃, 210℃-230℃, and the die head temperature is 230℃-260℃; the twin screw speed of the twin screw extruder is 400r / min.

[0102] Comparative Example 3

[0103] This comparative example 1 provides a PC / PET / POK alloy material capable of gas-assisted molding and a preparation method thereof. The raw material composition of the alloy material is as follows: PC is ET3113 (covestro, the melt index at 300℃ / 1.2kg is 6.5g / 10min): 80 parts; PET resin is CH-610 (Shanghai Yuanfang, the intrinsic viscosity is 0.800±0.015dl / g): 10 parts; POK resin is M630A (Korea Hyosung, the melt index at 240℃ / 1.2kg is 5.6g / 10min): 6 parts; compatibilizer POK-g-GMA (self-made): 3 parts; antioxidant 1076 (BASF) and antioxidant P-EPQ (BASF) (combined in a weight ratio of 1:1): 0.6 parts; lubricant PETS (Yite) and ethylene acrylic acid copolymer metal salt ionomer A-C540 (Honeywell) (combined in a weight ratio of 1:1): 0.4 parts.

[0104] Add the formulated raw materials into the mixer and mix at 100r / min for 15min, then melt the evenly mixed materials through a twin-screw, mix and shear, extrude, pull and pelletize from the die head to obtain a PC / PET / POK alloy material that can be gas-assisted molded. Among them, the temperatures of each section of the extruder are: 200℃-220℃, 210℃-230℃, 230℃-260℃, 230℃-260℃, 230℃-260℃, 220℃-250℃, 220℃-250℃, 210℃-230℃, 210℃-230℃, and the die head temperature is 230℃-260℃; the twin screw speed of the twin screw extruder is 400r / min.

[0105] Comparative Example 4

[0106] This comparative example provides a PC / PET / POK alloy material capable of gas-assisted molding and a preparation method thereof. The raw material composition of the alloy material is as follows: PC resin is ET3113 (covestro, melt index at 300℃ / 1.2kg is 6.5g / 10min): 76 parts; PET resin is CH-610 (Shanghai Yuanfang, intrinsic viscosity is 0.800±0.015dl / g): 10 parts; POK resin is M630A (Korea Hyosung, melt index at 240℃ / 1.2kg is 5.6g / 10min): 10 parts; compatibilizer PE-g-GMA (AX8840) (SK): 3 parts; antioxidant 1010 (BASF) and antioxidant 168 (BASF) (combined in a weight ratio of 1:1): 0.6 parts; ethylene bis stearamide ACRAWAX C (EBS American LONZA) and stearic acid erucamide Crodamide ER (CRODA) (combined in a weight ratio of 1:1): 0.4 parts.

[0107] Add the formulated raw materials into the mixer and mix at 100r / min for 15min, then melt the evenly mixed materials through a twin-screw, mix and shear, extrude, pull and pelletize from the die head to obtain a PC / PET / POK alloy material that can be gas-assisted molded. Among them, the temperatures of each section of the extruder are: 200℃-220℃, 210℃-230℃, 230℃-260℃, 230℃-260℃, 230℃-260℃, 220℃-250℃, 220℃-250℃, 210℃-230℃, 210℃-230℃, and the die head temperature is 230℃-260℃; the twin screw speed of the twin screw extruder is 400r / min.

[0108] Comparative Example 5

[0109] This comparative example provides a PC / PET / POK alloy material capable of gas-assisted molding and a preparation method thereof. The raw material composition of the alloy material is as follows: PC resin is ET3113 (covestro, melt index at 300℃ / 1.2kg is 6.5g / 10min): 71 parts; PET resin is CH-610 (Shanghai Yuanfang, intrinsic viscosity is 0.800±0.015dl / g): 15 parts; POK resin is M630A (Korea Hyosung, melt index at 240℃ / 1.2kg is 5.6g / 10min): 10 parts; compatibilizer MBS (E920) (SK): 3 parts; antioxidant 1010 (BASF) and antioxidant 168 (BASF) (combined in a weight ratio of 1:1): 0.6 parts; ethylene bis stearamide ACRAWAX C (EBS American LONZA) and stearic acid erucamide Crodamide ER (CRODA) (combined in a weight ratio of 1:1): 0.4 parts.

[0110] Add the formulated raw materials into the mixer and mix at 100r / min for 15min, then melt the evenly mixed materials through a twin-screw, mix and shear, extrude, pull and pelletize from the die head to obtain a PC / PET / POK alloy material that can be gas-assisted molded. Among them, the temperatures of each section of the extruder are: 200℃-220℃, 210℃-230℃, 230℃-260℃, 230℃-260℃, 230℃-260℃, 220℃-250℃, 220℃-250℃, 210℃-230℃, 210℃-230℃, and the die head temperature is 230℃-260℃; the twin screw speed of the twin screw extruder is 400r / min.

[0111] Comparative Example 6

[0112] This comparative example provides a PC / PET / POK alloy material capable of gas-assisted molding and a preparation method thereof. The raw material composition of the alloy material is as follows: PC resin is ET3113 (covestro, melt index at 300℃ / 1.2kg is 6.5g / 10min): 76 parts; PET resin is CH-610 (Shanghai Yuanfang, intrinsic viscosity is 0.800±0.015dl / g): 10 parts; POK resin is M630A (Korea Hyosung, melt index at 240℃ / 1.2kg is 5.6g / 10min): 10 parts; compatibilizer PET-g-GMA (self-made): 3 parts; antioxidant 1076 (BASF) and antioxidant P-EPQ (BASF) (combined in a weight ratio of 1:1): 0.6 parts; lubricant PETS (Yite) and ethylene acrylic acid copolymer metal salt ionomer A-C540 (Honeywell) (combined in a weight ratio of 1:1): 0.4 parts.

[0113] Add the formulated raw materials into the mixer and mix at 100r / min for 15min, then melt the evenly mixed materials through a twin-screw, mix and shear, extrude, pull and pelletize from the die head to obtain a PC / PET / POK alloy material that can be gas-assisted molded. Among them, the temperatures of each section of the extruder are: 200℃-220℃, 210℃-230℃, 230℃-260℃, 230℃-260℃, 230℃-260℃, 220℃-250℃, 220℃-250℃, 210℃-230℃, 210℃-230℃, and the die head temperature is 230℃-260℃; the twin screw speed of the twin screw extruder is 400r / min.

[0114]

[0115]

[0116] It can be seen from the results of the embodiments and comparative examples that:

[0117] It can be seen from Examples 1-4 that when the compatibilizer is POK-g-GMA, different PET and POK contents have an impact on the notched impact, flexural strength and modulus. Among them, when the POK content is high, the flexural strength and modulus of the material will be reduced; when the PET content is high, the melt index will become higher and the notched impact will decrease.

[0118] It can be seen from Examples 1-6 that controlling the melt index of PC resin and POK resin within a specific range can further improve the light transmittance;

[0119] It can be seen from Examples 1-2 and Examples 7-9 that when the compatibilizer system contains ionic liquid, the tensile strength, flexural strength, flexural modulus and notched impact strength of the alloy material can be improved simultaneously;

[0120] It can be seen from Examples 1, 7, and 9 that when the content of the ionic liquid in the compatibilizer system increases, although the tensile strength, flexural strength, flexural modulus, and notched impact strength of the alloy material can be increased to a certain extent, the melt flow rate of the alloy material will be too fast.

[0121] From Examples 1-3 and Comparative Examples 1 and 3, it can be seen that when the PC content increases, the tensile strength, flexural strength, modulus and impact strength are all improved, but the hydrolysis resistance deteriorates. It is speculated that this is mainly because the ester group of the PC molecular chain is easily hydrolyzed at high temperature, resulting in a decrease in strength; when the PET and POK contents are constant; when the POK and PET contents increase, the fluidity will increase. It is speculated that this is because POK and PET are crystalline materials. When the temperature reaches the melting point, the material is fully melted and becomes very easy to flow, but the fluidity is too high, which is not conducive to the processing and production of gas-assisted molding. The material needs to maintain a certain melt strength in the molten state.

[0122] It can be seen from Examples 1-3 and Comparative Examples 2-6 that the selection of the compatibilizer has an impact on the tensile strength, flexural strength, flexural modulus, notched impact strength and transmittance of the alloy material in the present invention. The use of POK-g-GMA and POK-g-GMA / ionic liquid in the present invention can obtain an alloy material with better comprehensive performance.

[0123] In summary, the alloy material provided by the present invention is prepared by optimizing the combination ratio of PC, PET, POK and a compatibilizer to obtain an alloy material with excellent comprehensive performance, which can be applied to automobile exterior parts.

[0124] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An alloy material for automobile exterior parts, characterized in that: The alloy material is used to make automobile exterior parts, and the alloy material includes the following components: PC resin, PET resin, POK resin and compatibilizer; The difference between the melt index of the PC resin at 300°C / 1.2kg and the melt index of the POK resin at 240°C / 1.2kg is 0.5g / 10min-5g / 10min; The preparation method of the compatibilizer comprises: melt-extruding and granulating 90-98 parts by weight of POK resin, 2-8 parts by weight of glycidyl methacrylate GMA, 0.1-0.5 parts by weight of peroxide initiator, and 5-7 parts by weight of ionic liquid to obtain the compatibilizer; The ionic liquid is selected from at least one of 1-hexyl-3-methylimidazole hydrogen sulfate, 1-butyl-3-methylimidazole hydrogen sulfate, 1-methylimidazole hydrogen sulfate and 1-hexyl-2,3,5-trimethylpyrazole hydrogen sulfate; the alloy material is obtained by melt-extruding, drawing and granulating the components through a twin-screw extruder.

2. The alloy material for automobile exterior parts according to claim 1, characterized in that: The proportions of the components are as follows: the weight ratio of the PC resin to the PET resin is 1:(0.08-0.35); the weight ratio of the PC resin to the POK resin is 1:(0.08-0.35); Preferably, the weight ratio of the PC resin to the PET resin is 1:(0.10-0.22); the weight ratio of the PC resin to the POK resin is 1:(0.10-0.22); and the weight ratio of the PC resin to the compatibilizer is 1:(0.01-0.10).

3. The alloy material for automobile exterior parts according to claim 1, characterized in that: The PC resin has a melting index of 5 g / 10 min-15 g / 10 min at 300° C. / 1.2 kg; the POK resin has a melting index of 5 g / 10 min-60 g / 10 min at 240° C. / 1.2 kg.

4. The alloy material for automobile exterior parts according to claim 3, characterized in that: The PC resin has a melting index of 5 g / 10 min-10 g / 10 min at 300° C. / 1.2 kg; and the POK resin has a melting index of 5 g / 10 min-10 g / 10 min at 240° C. / 1.2 kg.

5. The alloy material for automobile exterior parts according to claim 3, characterized in that: The intrinsic viscosity of the PET resin is 0.8 dl / g-1.2 dl / g.

6. The alloy material for automobile exterior parts according to any one of claims 1 to 5, characterized in that: The alloy material also includes an antioxidant; based on 100 parts by weight of the alloy material, the antioxidant accounts for 0.2 parts to 2.0 parts.

7. The alloy material for automobile exterior parts according to claim 6, characterized in that: The antioxidant includes a primary antioxidant and a secondary antioxidant, wherein the primary antioxidant is selected from 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate and / or pentaerythritol tetrakis[methyl-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate; The auxiliary antioxidant is selected from tris[2,4-di-tert-butylphenyl]phosphite and tetrakis(2,4-di-tert-butylphenyl-4,4'-biphenyl)bisphosphonate.

8. The alloy material for automobile exterior parts according to any one of claims 1 to 5, characterized in that: The alloy material also includes a lubricant; based on 100 parts by weight of the alloy material, the lubricant accounts for 0.2 parts to 2.0 parts.

9. The alloy material for automobile exterior parts according to claim 8, The lubricant comprises at least one of pentaerythritol stearate, N,N'-ethylenebisstearamide, ethylene acrylic acid copolymerized metal salt ionomer and stearic acid erucamide.

10. The alloy material for automobile exterior parts according to any one of claims 1 to 5, characterized in that: The automobile exterior trim includes an automobile door outer handle and an automobile rear wing.

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