PC / ABS (polycarbonate / acrylonitrile butadiene styrene) composition as well as preparation method and application thereof

Abstract

The invention discloses a PC / ABS (polycarbonate / acrylonitrile butadiene styrene) composition as well as a preparation method and application thereof. The PC / ABS composition comprises the following components in parts by weight: 20-60 parts of polycarbonate, 25-60 parts of ABS resin, 5-15 parts of talcum powder, 1-7 parts of a compatibilizer and 2-10 parts of a flexibilizer. The compatibilizer comprises isocyanate and a styrene-acrylonitrile-glycidyl methacrylate copolymer in a weight ratio of 1: (17-55). According to the PC / ABS composition disclosed by the invention, the isocyanate and the styrene-acrylonitrile-glycidyl methacrylate copolymer in a specific proportion are used as the compatibilizer, so that the PC / ABS composition has relatively low density and also has good high-temperature deformation resistance and high impact strength while a relatively small amount of talcum powder is used.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering plastics, and more specifically, to a PC / ABS composition, a preparation method thereof, and an application thereof. Background Art

[0002] The PC / ABS composition combines the advantages of polycarbonate PC and ABS, has excellent impact strength, good processability, and relatively low cost, and is widely used in the field of electronic appliances, especially for preparing air-conditioning air deflector. With the development of technology and the increasing improvement of people's living standards, the general public has put forward higher and higher requirements for the refrigeration and heating efficiency of household air conditioners. The air conditioner is gradually developing towards high power. The improvement of the heating efficiency causes the working environment temperature of the air-conditioning air deflector to increase accordingly. Under the action of heat energy, over time, the air deflector is prone to problems such as deformation, which is very unsightly and seriously affects the use when severe. One of the current conventional improvement means is to add talcum powder to the polycarbonate material, but this will not only cause a large increase in the density of the polycarbonate material, resulting in an increased burden on the motor controlling the air deflector, requiring a motor with a larger power, occupying a larger internal space of the air conditioner, resulting in a larger external dimension of the air conditioner, requiring more plastic, occupying a larger area of the house, and not conforming to the design concept of environmental protection and economy. In other words, adding a large amount of talcum powder to the polycarbonate material can improve the high-temperature deformation resistance of the air-conditioning air deflector, but it will increase the density of the polycarbonate material and reduce the impact performance of the polycarbonate material, resulting in an increase in production and use costs.

[0003] Therefore, developing a new PC / ABS composition that can improve the high-temperature deformation resistance and impact strength of the PC / ABS composition while using less talcum powder, so that the PC / ABS composition has good high-temperature deformation resistance and high impact strength while having a lower density, has important economic value. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies of the prior art, and to provide a PC / ABS composition, a preparation method thereof, and an application thereof.

[0005] To achieve the above purpose, the technical solutions adopted by the present invention are as follows:

[0006] In the first aspect, the present invention provides a PC / ABS composition, comprising the following components in parts by weight:

[0007] 20-60 parts of polycarbonate, 25-60 parts of ABS resin (ternary copolymer of acrylonitrile, 1,3-butadiene and styrene), 5-15 parts of talcum powder, 1-7 parts of compatibilizer, 2-10 parts of toughener;

[0008] Wherein:

[0009] The compatibilizer comprises isocyanate and styrene - acrylonitrile - glycidyl methacrylate copolymer (SAG) with a weight ratio of 1:(17 - 55).

[0010] In the PC / ABS composition of the present invention, by using isocyanate and styrene - acrylonitrile - glycidyl methacrylate copolymer (SAG) in specific proportions as the compatibilizer, the high - temperature deformation resistance and impact strength of the PC / ABS composition can be improved while using less talcum powder. Even when the PC / ABS composition has a lower density, it has good high - temperature deformation resistance and high impact strength.

[0011] Specifically, the density of the PC / ABS composition is closely related to the amount of talcum powder used. When the amount of talcum powder used decreases, the density of the PC / ABS composition will decrease. The compatibilizer of the present invention, by using isocyanate and styrene - acrylonitrile - glycidyl methacrylate copolymer (SAG) in specific proportions, can improve the dispersibility of talcum powder in the ABS resin, enhance the bonding strength between talcum powder and the ABS resin, and improve the interfacial strength between polycarbonate and ABS, thereby enhancing the structural strength and stability of the PC / ABS composition, as well as its high - temperature deformation resistance and impact strength. Therefore, the high - temperature deformation resistance and impact strength of the PC / ABS composition can be improved while using less talcum powder. Even when the PC / ABS composition has a lower density, it has good high - temperature deformation resistance and high impact strength. This avoids the problems of excessive density and low impact performance of the PC / ABS composition caused by adding too much talcum powder to improve the high - temperature deformation resistance.

[0012] Preferably, in the compatibilizer, the weight ratio of isocyanate to styrene - acrylonitrile - glycidyl methacrylate copolymer (SAG) is one of 1:17, 1:18, 1:19, 1:20, 1:21, 1:22, 1:23, 1:24, 1:25, 1:26, 1:27, 1:28, 1:29, 1:30, 1:31, 1:32, 1:33, 1:34, 1:35, 1:36, 1:37, 1:38, 1:39, 1:40, 1:41, 1:42, 1:43, 1:44, 1:45, 1:46, 1:47, 1:48, 1:49, 1:50, 1:51, 1:52, 1:53, 1:54, 1:55 or any range value between any two of them.

[0013] More preferably, the compatibilizer comprises isocyanate and styrene - acrylonitrile - glycidyl methacrylate copolymer (SAG) with a weight ratio of 1:(20 - 50).

[0014] More preferably, the compatibilizer comprises an isocyanate and a styrene-acrylonitrile-glycidyl methacrylate copolymer (SAG) in a weight ratio of 1:(28 - 42); specifically, the compatibilizer comprises an isocyanate and a styrene-acrylonitrile-glycidyl methacrylate copolymer (SAG) in a weight ratio of 1:(30 - 40).

[0015] Preferably, the isocyanate is at least one of an aliphatic diisocyanate and an aromatic diisocyanate.

[0016] More preferably, the aliphatic diisocyanate is at least one of hexamethylene diisocyanate and isophorone diisocyanate.

[0017] More preferably, the aromatic diisocyanate is toluene diisocyanate and diphenylmethane diisocyanate.

[0018] Preferably, the epoxy equivalent weight of the styrene-acrylonitrile-glycidyl methacrylate copolymer (SAG) is 200 - 1200 g / mol.

[0019] More preferably, the epoxy equivalent weight of the styrene-acrylonitrile-glycidyl methacrylate copolymer (SAG) is 400 - 920 g / mol.

[0020] In the present invention, the epoxy equivalent weight of the styrene-acrylonitrile-glycidyl methacrylate copolymer (SAG) is tested according to ASTM D1652 standard.

[0021] Preferably, the melt flow rate (melt mass flow rate) of the polycarbonate measured under the conditions of 300 °C and 1.2 kg is 6 - 60 g / 10 min.

[0022] More preferably, the melt flow rate (melt mass flow rate) of the polycarbonate measured under the conditions of 300 °C and 1.2 kg is one of 6 g / 10 min, 7 g / 10 min, 8 g / 10 min, 9 g / 10 min, 10 g / 10 min, 12 g / 10 min, 15 g / 10 min, 17 g / 10 min, 20 g / 10 min, 21 g / 10 min, 22 g / 10 min, 23 g / 10 min, 24 g / 10 min, 25 g / 10 min, 27 g / 10 min, 30 g / 10 min, 32 g / 10 min, 35 g / 10 min, 37 g / 10 min, 40 g / 10 min, 42 g / 10 min, 45 g / 10 min, 47 g / 10 min, 50 g / 10 min, 52 g / 10 min, 55 g / 10 min, 57 g / 10 min, 60 g / 10 min or any range value between any two of them.

[0023] More preferably, the melt flow rate (melt mass flow rate) of the polycarbonate measured under the conditions of 300 °C and 1.2 kg is 9-60 g / 10 min.

[0024] Even more preferably, the melt flow rate (melt mass flow rate) of the polycarbonate measured under the conditions of 300 °C and 1.2 kg is 9-35 g / 10 min.

[0025] The melt flow rate (melt mass flow rate) of the polycarbonate in the present invention is tested according to the ASTM D-1238 standard.

[0026] Preferably, the ABS resin (ternary copolymer of acrylonitrile, 1,3-butadiene and styrene) is at least one of emulsion ABS and bulk ABS.

[0027] Preferably, the D50 particle size of the talcum powder is 0.5-4 μm.

[0028] Even more preferably, the D50 particle size of the talcum powder is one of 0.5 μm, 0.55 μm, 0.6 μm, 0.65 μm, 0.7 μm, 0.75 μm, 0.8 μm, 0.85 μm, 0.9 μm, 0.95 μm, 1.0 μm, 1.1 μm, 1.2 μm, 1.3 μm, 1.4 μm, 1.5 μm, 1.6 μm, 1.7 μm, 1.8 μm, 1.9 μm, 2.0 μm, 2.1 μm, 2.2 μm, 2.3 μm, 2.4 μm, 2.5 μm, 2.6 μm, 2.7 μm, 2.8 μm, 2.9 μm, 3.0 μm, 3.1 μm, 3.2 μm, 3.3 μm, 3.4 μm, 3.5 μm, 3.6 μm, 3.7 μm, 3.8 μm, 3.9 μm, 4 μm or the range value of any two of them.

[0029] Even more preferably, the D50 particle size of the talcum powder is 0.5-3.5 μm.

[0030] More preferably, the D50 particle size of the talcum powder is 0.5-2.5 μm, specifically 0.65-2.5 μm.

[0031] The D50 particle size of the talcum powder in the present invention is tested by a Mastersizer 3000 laser particle size analyzer according to the standard of GB / T19077-2016 "Laser diffraction method for particle size analysis".

[0032] Common toughening agents in the art can be used in the present invention, such as: at least one of MBS resin (ternary copolymer of methyl methacrylate-butadiene-styrene), acrylate toughening agent and silicon-based toughening agent.

[0033] Preferably, the PC / ABS composition further comprises other processing aids.

[0034] More preferably, the weight parts of the other processing aids are 0.1-10 parts.

[0035] Even more preferably, the weight parts of the other processing aids are 0.1-3 parts.

[0036] More preferably, the other processing aids are at least one of antioxidant, light stabilizer, heat stabilizer, and flame retardant.

[0037] Other commonly used processing aids in the art, such as antioxidant, light stabilizer, heat stabilizer, flame retardant, etc., can all be used in the present invention.

[0038] Preferably, among the components of the PC / ABS composition, the weight parts of polycarbonate are one of 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts, 60 parts or the range value of any two of them; the weight parts of ABS resin are one of 25 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts, 60 parts or the range value of any two of them; the weight parts of talcum powder are one of 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts or the range value of any two of them; the weight parts of compatibilizer are one of 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, 5.5 parts, 6 parts, 6.5 parts, 7 parts or the range value of any two of them; the weight parts of toughening agent are one of 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.5 parts, 8 parts, 8.5 parts, 9 parts, 9.5 parts, 10 parts or the range value of any two of them.

[0039] More preferably, the PC / ABS composition comprises the following components in weight parts:

[0040] 25-55 parts of polycarbonate, 30-55 parts of ABS resin (ternary copolymer of acrylonitrile, 1,3-butadiene and styrene), 7-13 parts of talcum powder, 2-5 parts of compatibilizer, and 3-8 parts of toughening agent.

[0041] Preferably, based on the weight of the PC / ABS composition, the weight percentage content of the polycarbonate and the ABS resin ≥40%.

[0042] More preferably, based on the weight of the PC / ABS composition, the weight percentage content of the polycarbonate and the ABS resin is 40%-94%.

[0043] Preferably, the mass of the talcum powder ≤ 20% of the total mass of the polycarbonate and the ABS resin.

[0044] More preferably, the mass of the talcum powder accounts for one or any range value of two of 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20% of the total mass of the polycarbonate and the ABS resin.

[0045] Even more preferably, the mass of the talcum powder accounts for 4% - 16% of the total mass of the polycarbonate and the ABS resin.

[0046] In a second aspect, the present invention provides a method for preparing a PC / ABS composition, comprising the following steps:

[0047] Mix each component and extrude and pelletize to obtain the PC / ABS composition.

[0048] Preferably, the temperature of the extrusion and pelletizing is 220 - 260 °C.

[0049] Preferably, the rotation speed of the mixing is 300 - 600 rpm.

[0050] In a third aspect, the present invention provides an application of the PC / ABS composition in the preparation of an air conditioner air deflector.

[0051] The electronic and electrical products of the present invention include but are not limited to air conditioners, printers, monitors, computers, etc.

[0052] Preferably, the application refers to the application of the PC / ABS composition in the preparation of an air conditioner air deflector.

[0053] Compared with the prior art, the beneficial effects of the present invention are:

[0054] In the PC / ABS composition of the present invention, by using a specific proportion of isocyanate and styrene - acrylonitrile - glycidyl methacrylate copolymer (SAG) as a compatibilizer, the high-temperature deformation resistance and impact strength of the PC / ABS composition can be improved while using less talcum powder, so that the PC / ABS composition has good high-temperature deformation resistance and high impact strength while having a lower density.

[0055] Specifically, the density of the PC / ABS composition is closely related to the dosage of talcum powder. When the dosage of talcum powder decreases, the density of the PC / ABS composition will decrease. The compatibilizer of the present invention can improve the dispersion of talcum powder in the ABS resin, enhance the bonding strength between talcum powder and the ABS resin, and improve the interfacial strength between polycarbonate and ABS by using a specific ratio of isocyanate and styrene-acrylonitrile-glycidyl methacrylate copolymer (SAG). Therefore, the structural strength and stability of the PC / ABS composition, as well as the ability to resist high-temperature deformation and impact strength, can be enhanced. Thus, the ability of the PC / ABS composition to resist high-temperature deformation and impact strength can be improved while using less talcum powder, enabling the PC / ABS composition to have good high-temperature deformation resistance and high impact strength while having a relatively low density. This avoids the problems of excessive density and low impact performance of the PC / ABS composition caused by adding too much talcum powder to improve the high-temperature deformation resistance. Detailed implementation mode

[0056] To better illustrate the purpose, technical solution and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0057] For the experimental methods without specific conditions in the following examples and comparative examples, they are generally carried out according to the conventional conditions in the art or according to the conditions recommended by the manufacturer; the raw materials, reagents, etc. used, unless otherwise specified, are raw materials and reagents that can be obtained from commercial channels such as conventional markets.

[0058] In the embodiments and comparative examples of the present invention, the usage of reagents is as follows:

[0059] Isocyanate-1, aliphatic diisocyanate, hexamethylene diisocyanate, commercially available;

[0060] Isocyanate-2, aromatic diisocyanate, diphenylmethane diisocyanate, commercially available;

[0061] Styrene-acrylonitrile-glycidyl methacrylate copolymer-1 (SAG-1), SAG-005, epoxy equivalent weight is 850-920 g / mol, Shanghai Rizhisheng;

[0062] Styrene-acrylonitrile-glycidyl methacrylate copolymer-2 (SAG-2), SAG-002, epoxy equivalent weight is 400-850 g / mol, Jiayirong;

[0063] Ethylene-containing copolymer, ethylene-acrylate-glycidyl methacrylate terpolymer, PTW, DuPont;

[0064] Maleic anhydride grafted ABS, KT-2, Ketong;

[0065] Polycarbonate - 1, PC 2350, Wanhua Chemical, the melt flow rate (melt mass flow rate) measured under the conditions of 300 °C and 1.2 kg is 35 g / 10 min;

[0066] Polycarbonate - 2, PC LXTY1609T - 11, Luxi Chemical, the melt flow rate (melt mass flow rate) measured under the conditions of 300 °C and 1.2 kg is 9 g / 10 min;

[0067] Polycarbonate - 3, PC 2600, Wanhua Chemical, the melt flow rate (melt mass flow rate) measured under the conditions of 300 °C and 1.2 kg is 60 g / 10 min;

[0068] ABS resin - 1, emulsion - type ABS, PA - 757K, Chemezon Zhenjiang, China;

[0069] ABS resin - 2, bulk - type ABS, 8434, Shanghai Gaqiao;

[0070] Talcum powder - 1, HTPultra5, D50 particle size is 0.65 μm, Aihai Yimi;

[0071] Talcum powder - 2, HTP2, D50 particle size is 2.5 μm, Aihai Yimi;

[0072] Talcum powder - 3, HTP3, D50 particle size is 3.5 μm, Aihai Yimi;

[0073] Toughening agent, MBS resin (methyl methacrylate - butadiene - styrene terpolymer), M - 521, Kaneka;

[0074] Other processing aids, antioxidant, SONOX 168, Sanfeng Chemical.

[0075] In the present invention, the epoxy equivalent weight of the styrene - acrylonitrile - glycidyl methacrylate copolymer (SAG) is tested according to the ASTM D1652 standard.

[0076] In the present invention, the melt flow rate (melt mass flow rate) of the polycarbonate is tested according to the ASTM D - 1238 standard.

[0077] In the present invention, the D50 particle size of the talcum powder is tested using a Mastersizer 3000 laser particle size analyzer according to the GB / T19077 - 2016 "Particle Size Analysis - Laser Diffraction Method" standard.

[0078] Examples 1 - 12 and Comparative Examples 1 - 8

[0079] Examples 1-12 and Comparative Examples 1-8 provide different PC / ABS compositions, which differ only in the types and amounts of each component. Calculated by weight parts, Examples 1-12 and Comparative Examples 1-8 include the components shown in Table 1-2;

[0080] The preparation method of the PC / ABS compositions of Examples 1-12 and Comparative Examples 1-8 includes the following steps:

[0081] Mix each component at a rotation speed of 500 rpm, and extrude and pelletize using a twin-screw extruder at 230 ± 5 °C to obtain the PC / ABS composition;

[0082] The length-diameter ratio of the twin-screw extruder is 40:1;

[0083] Table 1 Weight parts of each component in the PC / ABS compositions of Examples 1-12

[0084]

[0085]

[0086]

[0087] Table 2 Weight parts of each component in the PC / ABS compositions of Comparative Examples 1-8

[0088]

[0089] Performance testing

[0090] Perform the following performance tests on the PC / ABS compositions of each example and comparative example:

[0091] 1. Density test

[0092] Measure the density of the PC / ABS composition of each example or comparative example according to the ISO 1183-1-2012 standard; the qualified standard for density is ≤ 1.180 g·cm -3 ;

[0093] 2. High-temperature deformation resistance test

[0094] The strength of the high-temperature deformation resistance described in the present invention refers to the amount of deformation of the PC / ABS composition after being placed at 70 °C for 7 days, and the amount of deformation represents the strength of the high-temperature deformation resistance of the PC / ABS composition; among them, the specific test method for the amount of deformation is as follows:

[0095] The PC / ABS compositions of each example or comparative example were injection molded into rectangular plates with dimensions of 10 cm × 80 cm × 0.3 cm at 250 °C, placed at 23 °C for 2 days, then put into a constant temperature oven at 70 °C for 7 days. After taking them out, they were placed on a horizontal measurement platform, and the maximum distance (unit: mm, accurate to two decimal places) between the rectangular plate and the horizontal measurement platform was measured using a plug gauge, and this was taken as the deformation amount of the PC / ABS composition; moreover, the larger this deformation amount, the weaker the ability of the PC / ABS composition to resist high-temperature deformation; the passing standard for the ability to resist high-temperature deformation is ≤ 1.10 mm, and the excellent standard is ≤ 0.8 mm;

[0096] 3. Impact Strength Test

[0097] The PC / ABS composition was heated at 250 °C and made into samples with dimensions of 80 mm × 10 mm × 4 mm (length × width × height). According to the ISO 180-2023 standard, the cantilever beam notched impact strength test was carried out on the PC / ABS composition, and the impact strength data were recorded; the passing standard for the impact strength is ≥ 13 kJ·m -2 , and the excellent standard is ≥ 24 kJ·m -2 ;

[0098] The experimental results are shown in the following table:

[0099] Table 3 Performance Test Results of Each Example and Comparative Example

[0100]

[0101]

[0102] As can be seen from Table 3, in the PC / ABS composition of the present invention, by using a specific ratio of isocyanate and styrene-acrylonitrile-glycidyl methacrylate copolymer (SAG) as a compatibilizer, it is possible to improve the high-temperature deformation resistance and impact strength of the PC / ABS composition while using less talc powder, so that the PC / ABS composition has good high-temperature deformation resistance and high impact strength while having a lower density. Moreover, the density of the PC / ABS composition is ≤ 1.180 g / cm 3 , the deformation amount is ≤ 1.10 mm, and the impact strength is ≥ 13 kJ / m 2 .

[0103] Specifically, the density of the PC / ABS composition is closely related to the dosage of talcum powder. When the dosage of talcum powder decreases, the density of the PC / ABS composition will decrease. The compatibilizer of the present invention can improve the dispersion of talcum powder in the ABS resin, enhance the bonding strength between talcum powder and the ABS resin, and improve the interfacial strength between polycarbonate and ABS by using a specific ratio of isocyanate and styrene-acrylonitrile-glycidyl methacrylate copolymer (SAG). Therefore, the structural strength and stability of the PC / ABS composition, as well as the ability to resist high-temperature deformation and impact strength, can be enhanced. Thus, the ability to resist high-temperature deformation and impact strength of the PC / ABS composition can be improved while using less talcum powder, enabling the PC / ABS composition to have good high-temperature deformation resistance and high impact strength while having a relatively low density. This avoids the problems of excessive density and low impact performance of the PC / ABS composition caused by adding too much talcum powder to improve the high-temperature deformation resistance.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A PC / ABS composition, characterized in that: The composition comprises the following components in parts by weight: Polycarbonate 20-60 parts, ABS resin 25-60 parts, talc 5-15 parts, compatibilizer 1-7 parts, toughener 2-10 parts; in: The compatibilizer includes isocyanate and styrene-acrylonitrile-glycidyl methacrylate copolymer in a weight ratio of 1:(17-55).

2. The PC / ABS composition according to claim 1, characterized in that: The compatibilizer includes isocyanate and styrene-acrylonitrile-glycidyl methacrylate copolymer in a weight ratio of 1:(28-42).

3. The PC / ABS composition according to claim 1, characterized in that: Including at least one of the following (1)-(4): (1) The isocyanate is at least one of an aliphatic diisocyanate and an aromatic diisocyanate; (2) The polycarbonate has a melt flow rate of 6-60 g / 10 min measured at 300° C. and 1.2 kg; (3) the epoxy equivalent weight of the styrene-acrylonitrile-glycidyl methacrylate copolymer is 200-1200 g / mol; (4) The PC / ABS composition further comprises other processing aids.

4. The PC / ABS composition according to claim 3, characterized in that: Including at least one of the following (1)-(6): (1) The aliphatic diisocyanate is at least one of hexamethylene diisocyanate and isophorone diisocyanate; (2) The aromatic diisocyanate is toluene diisocyanate or diphenylmethane diisocyanate; (3) The polycarbonate has a melt flow rate of 9-35 g / 10 min measured at 300° C. and 1.2 kg; (4) the epoxy equivalent weight of the styrene-acrylonitrile-glycidyl methacrylate copolymer is 400-920 g / mol; (5) The weight proportion of the other processing aids is 0.1-10 parts; (6) The other processing aids are at least one of an antioxidant, a light stabilizer, a heat stabilizer, and a flame retardant.

5. The PC / ABS composition according to claim 1, characterized in that: The ABS resin is at least one of emulsion ABS and bulk ABS.

6. The PC / ABS composition according to claim 1, characterized in that: Include at least one of the following (1)-(2): (1) The D50 particle size of the talc is 0.5-4 μm; (2) The toughening agent includes at least one of MBS resin, acrylic toughening agent, and silicon toughening agent.

7. The PC / ABS composition according to claim 1, characterized in that: The mass of the talc powder is ≤ 20% of the total mass of the polycarbonate and the ABS resin.

8. The PC / ABS composition according to claim 1, characterized in that: The PC / ABS composition comprises the following components in parts by weight: 25-55 parts of polycarbonate, 30-55 parts of ABS resin, 7-13 parts of talc, 2-5 parts of compatibilizer, and 3-8 parts of toughening agent.

9. A method for preparing the PC / ABS composition according to any one of claims 1 to 8, characterized in that: The steps include: The components are mixed and extruded into granules to obtain a PC / ABS composition.

10. Use of the PC / ABS composition according to any one of claims 1 to 8 in preparing an air guide plate for an air conditioner.

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