High-density pc / abs alloy material for automobile sunroof frame and preparation method thereof

Abstract

The application discloses a high-density PC / ABS alloy material for an automobile sunroof frame and a preparation method thereof, and belongs to the technical field of high polymer materials. The high-density PC / ABS alloy material comprises the following raw materials in parts by weight: PC resin 30-40 parts, ABS resin 8-15 parts, barium sulfate 20-30 parts, glass fiber 20-30 parts, toughening agent 4-6 parts, antioxidant 0.3-0.6 parts, compatibilizer 0.3-0.6 parts and lubricant 0.2-0.4 parts. The material is prepared through the blending and melt extrusion mode, and the process is simple and the operability is strong. The density of the material can be effectively improved through the mixing of barium sulfate and glass fiber fillers in different proportions. The addition of the glass fiber can compensate for the influence of the barium sulfate on the impact performance of the material. In addition, the ethylene-acrylic acid copolymer is used as the compatibilizer to improve the fraction filled in the matrix material and improve the toughness of the high-density PC / ABS alloy material for the automobile sunroof frame.

Description

Technical Field

[0001] This invention belongs to the field of polymer materials technology, specifically relating to a high-density PC / ABS alloy material for automotive sunroof frames and its preparation method. Background Technology

[0002] Acrylonitrile-butadiene-styrene copolymer (ABS) resin falls between engineering plastics and general-purpose plastics, possessing superior impact resistance, processability, and lower cost. Polycarbonate (PC) is one of the most widely used engineering plastics due to its advantages such as dimensional stability, electrical insulation, creep resistance, weather resistance, and transparency. PC / ABS alloys, prepared by blending ABS and PC materials, are widely used in automotive interior and exterior parts due to their excellent comprehensive performance and wide availability. Interior components include dashboards, A, B, C, and D pillar trim panels, center console panels, headliners, and door frame frames, while exterior components include license plate panels and rear spoilers. Sunroof frames are an important component of automobiles. However, for parts made from PC / ABS alloys requiring high impact strength and high density, conventional PC / ABS alloys cannot meet the requirements. While adding inorganic fillers to PC / ABS alloys can increase their density, it drastically reduces the material's impact strength. This inability to meet the high impact and high density requirements of special parts significantly limits the application of PC / ABS alloys in various fields. Summary of the Invention

[0003] The purpose of this invention is to provide a high-density PC / ABS alloy material for automotive sunroof frames and its preparation method, so as to solve the problem of poor impact resistance of PC / ABS alloy materials.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A high-density PC / ABS alloy material for automotive sunroof frames comprises the following raw materials in parts by weight: 30-40 parts PC resin, 8-15 parts ABS resin, 20-30 parts barium sulfate, 20-30 parts glass fiber, 4-6 parts toughening agent, 0.3-0.6 parts antioxidant, 0.3-0.6 parts compatibilizer, and 0.2-0.4 parts lubricant.

[0006] Furthermore, the mass ratio of barium sulfate to glass fiber is 3:2 to 2:3.

[0007] Furthermore, the PC resin is an aliphatic polycarbonate or an aromatic polycarbonate, and its melt flow index is 3-35 g / 10 min under the conditions of 300°C and 1.2 kg.

[0008] Furthermore, the melt flow index of the ABS resin at 220°C and 10 kg is 15-25 g / 10 min.

[0009] Furthermore, the barium sulfate has a mesh size of 7000-12000 mesh.

[0010] Furthermore, the glass fiber has a diameter of 8–15 μm and a length of 2–7 mm.

[0011] Furthermore, the toughening agent is at least one of ABS high-resin powder, MBS, and EBS.

[0012] Furthermore, the lubricant is an ethylene-acrylic acid copolymer.

[0013] Furthermore, the antioxidant is a phosphite antioxidant.

[0014] Furthermore, the phosphite antioxidant is preferably at least one of phenol-free phosphite antioxidants, low-phenol phosphite antioxidants, and phenol-containing phosphite antioxidants.

[0015] A method for preparing a high-density PC / ABS alloy material for automotive sunroof frames includes the following steps:

[0016] Step 1: Mix PC resin, ABS resin, barium sulfate, glass fiber, toughening agent, compatibilizer, lubricant, and antioxidant evenly according to the weight parts, and mix them in a high-speed mixer at room temperature of 23°C to obtain a mixture.

[0017] The second step involves melting, mixing, extruding, water-cooling, and pelletizing the mixture in a twin-screw extruder to obtain PC / ABS alloy material.

[0018] Furthermore, the barrel temperature of the extruder is 100±10℃, 220±10℃, 220±10℃, 220±10℃, 220±10℃, 240±10℃, 240±10℃, 240±10℃, 240±10℃, 240±10℃, 240±10℃, 240±10℃, 240±10℃, 240±10℃, respectively from zone one to zone twelve. The screw speed is 400±50 r / min, and the vacuum degree is 0.07MPa-0.1MPa.

[0019] The beneficial effects of this invention are:

[0020] This invention effectively increases the density of high-density PC / ABS alloy materials for automotive sunroof frames by mixing barium sulfate and glass fiber filler in different proportions. The addition of glass fiber compensates for the impact resistance of barium sulfate on the material. Furthermore, using ethylene-acrylic acid copolymer as a compatibilizer increases the filler fraction in the matrix material, thereby improving the toughness of the high-density PC / ABS alloy materials for automotive sunroof frames. This invention prepares high-density PC / ABS alloy materials for automotive sunroof frames through blending and melt extrusion, a simple and highly operable process. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] The specific information of the raw materials used in the following examples and comparative examples is as follows:

[0023] PC resin, manufactured by Cangzhou Dahua, brand name CH8105;

[0024] ABS resin, manufactured by Shanghai Gaoqiao, grade ABS 8434;

[0025] Barium sulfate, manufactured by Simon Chemical.

[0026] Fiberglass, manufactured by China Jushi, grade ECS13-03-510;

[0027] Toughening agent selected: Kanekazuchi, Japan, MBS 722;

[0028] The compatibilizer selected is Honeywell ethylene-acrylic acid copolymer;

[0029] The lubricant used is Italian PETS (dipentaerythritol stearate).

[0030] Antioxidants, BASF's 1076 and 168 are selected;

[0031] All materials used are commercially available, commonly used products.

[0032] Examples 1-5

[0033] Weigh out the PC resin, ABS resin, barium sulfate, glass fiber, toughening agent, compatibilizer, lubricant, and antioxidant according to the weight proportions listed in Table 1 below, add them to a high-speed mixer and mix at a speed of 400-600 rpm / min for 4-6 minutes to obtain the mixture.

[0034] The mixture was placed in a twin-screw extruder for extrusion granulation; the temperatures of each zone were 100℃, 220℃, 220℃, 220℃, 220℃, 240℃, 240℃, 240℃, 240℃, 240℃, 240℃, 240℃, 240℃, the screw speed was 400 r / min, and the vacuum degree (negative pressure) was 0.08 MPa.

[0035] Table 1

[0036] PC resin 30 35 35 35 40 ABS resin 15 10 10 10 8 Barium sulfate 20 30 25 20 30 Fiberglass 30 20 25 30 20 toughening agent 4 5 5 5 6 compatibilizer 0.3 0.5 0.5 0.5 0.6 lubricant 0.2 0.2 0.2 0.2 0.4 Antioxidant 1076 0.1 0.2 0.2 0.2 0.3 Antioxidant 168 0.2 0.2 0.2 0.2 0.3

[0037] Comparative Examples 1-5

[0038] Weigh out the PC resin, ABS resin, barium sulfate, glass fiber, toughening agent, compatibilizer, lubricant, and antioxidant according to the weight proportions listed in Table 2 below, add them to a high-speed mixer and mix at a speed of 400-600 rpm / min for 4-6 minutes to obtain the mixture.

[0039] The mixture was placed in a twin-screw extruder for extrusion granulation; the temperatures of each zone were 100℃, 220℃, 220℃, 220℃, 220℃, 240℃, 240℃, 240℃, 240℃, 240℃, 240℃, 240℃, 240℃, the screw speed was 400 r / min, and the vacuum degree (negative pressure) was 0.08 MPa.

[0040] Table 2

[0041] PC resin 35 35 35 35 35 ABS resin 10 10 10 10 10 Barium sulfate 50 40 10 - 25 Fiberglass - 10 40 50 25 toughening agent 5 5 5 5 5 compatibilizer 0.5 0.5 0.5 0.5 - lubricant 0.2 0.2 0.2 0.2 0.2 Antioxidant 1076 0.2 0.2 0.2 0.2 0.2 Antioxidant 168 0.2 0.2 0.2 0.2 0.2

[0042] The performance of the samples prepared in Examples 1-5 and Comparative Examples 1-5 was tested:

[0043] Density was determined according to standard GB / T 1033.1-2008;

[0044] Tensile strength was determined according to the standard tensile strength GB / T 1040.2-2022;

[0045] Bending strength was determined according to standard GB / T 9341-2008;

[0046] The notched impact strength of the cantilever beam was determined according to standard GB / T 1043.1-2008;

[0047] The results are shown in Table 3:

[0048] Table 3

[0049]

[0050]

[0051] Based on the test results of Examples 1-5 and Comparative Examples 1-5, it can be seen that: by compounding barium sulfate with glass fiber material, with a total addition of 50 parts and a barium sulfate to glass fiber ratio between 3:2 and 2:3, a high-density, high-impact alloy material (cantilever beam notched impact ≥8kJ / m) can be prepared. 2 Density ≥ 1.55 g / m³ 3 ).

[0052] Adding barium sulfate and glass fiber filler can effectively increase the density of alloy materials, with barium sulfate being more effective at increasing density. However, the addition of barium sulfate leads to a significant decrease in the material's impact performance (cantilever beam notched impact ≤3kJ / m). 2 This cannot meet the material forming requirements (cantilever beam notched impact ≥8kJ / m). 2 Adding only glass fiber filler can meet the impact requirements of molding, but the material density is too low; adding only one type of filler cannot simultaneously meet the customer's needs for both impact performance and density.

[0053] A comparison of the test results of Comparative Example 5 and Example 2 shows that:

[0054] Using ethylene-acrylic acid copolymer as a compatibilizer can effectively improve the mechanical properties of materials. This is because the compatibilizer effectively improves the dispersion of fillers in the matrix and avoids filler agglomeration.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-density PC / ABS alloy material for automotive sunroof frames, characterized in that, The raw materials include the following parts by weight: 30-40 parts PC resin, 8-15 parts ABS resin, 20-30 parts barium sulfate, 20-30 parts glass fiber, 4-6 parts toughening agent, 0.3-0.6 parts antioxidant, 0.3-0.6 parts compatibilizer, and 0.2-0.4 parts lubricant, wherein the mass ratio of barium sulfate to glass fiber is 3:2-2:3; the cantilever beam notched impact test is ≥8 kJ / m. 2 Density ≥ 1.55 g / m³ 3 ; The PC resin is an aliphatic polycarbonate or an aromatic polycarbonate, and its melt flow index is 3-35 g / 10 min under the conditions of 300℃ and 1.2 kg. The melt flow index of the ABS resin at 220℃ and 10Kg is 15-25g / 10min; The barium sulfate has a mesh size of 7000-12000 mesh; The glass fiber has a diameter of 8–15 μm and a length of 2–7 mm.

2. The high-density PC / ABS alloy material for automotive sunroof frames according to claim 1, characterized in that, The toughening agent is at least one of ABS high-polymer powder and MBS; The compatibilizer is an ethylene-acrylic acid copolymer; The antioxidant is a phosphite antioxidant.

3. The high-density PC / ABS alloy material for automotive sunroof frames according to claim 2, characterized in that, The phosphite antioxidant is at least one of phenol-free phosphite antioxidants and phenol-containing phosphite antioxidants.

4. A method for preparing a high-density PC / ABS alloy material for an automotive sunroof frame as described in any one of claims 1-3, characterized in that, Includes the following steps: Step 1: Mix PC resin, ABS resin, barium sulfate, glass fiber, toughening agent, compatibilizer, lubricant, and antioxidant evenly according to the weight parts, and mix them in a high-speed mixer at room temperature of 23°C to obtain a mixture. The second step involves melting, mixing, extruding, water-cooling, and pelletizing the mixture in a twin-screw extruder to obtain PC / ABS alloy material.

5. The method for preparing high-density PC / ABS alloy material for automotive sunroof frames according to claim 4, characterized in that, The barrel temperature of the extruder is 100±10℃, 220±10℃, 220±10℃, 220±10℃, 220±10℃, 240±10℃, 240±10℃, 240±10℃, 240±10℃, 240±10℃, 240±10℃, 240±10℃, 240±10℃, 240±10℃ respectively from zone 1 to zone 12. The screw speed is 400±50 r / min and the vacuum degree is 0.07MPa-0.1MPa.

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