High-density PC / ABS alloy material for automobile skylight frame and preparation method of high-density PC / ABS alloy material

Abstract

The invention discloses a high-density PC / ABS alloy material for automobile skylight frames 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 by weight: 30-40 parts of PC resin, 8-15 parts of ABS resin, 20-30 parts of barium sulfate, 20-30 parts of glass fiber, 4-6 parts of a flexibilizer, 0.3-0.6 part of an antioxidant, 0.3-0.6 part of a compatilizer, and 0.2-0.4 part of a lubricant. The material is prepared in a blending and melt extrusion mode, the process is simple, and operability is high. The density of the material can be effectively improved by mixing the barium sulfate and the glass fiber filler according to different proportions, the influence of the barium sulfate on the impact performance of the material can be made up by adding the glass fibers, and in addition, the ethylene-acrylic acid copolymer is used as a compatilizer to improve the fraction of the material filled in a matrix material. The toughness of the high-density PC / ABS alloy material for the automobile skylight frame is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high-density PC / ABS alloy material for an automobile sunroof frame and a preparation method thereof. Background Art

[0002] Acrylonitrile-butadiene-styrene copolymer (ABS) resin is between engineering plastics and general plastics, and has excellent impact resistance, processing performance and low cost. Polycarbonate (PC) has become one of the most widely used engineering plastics due to its advantages such as dimensional stability, electrical insulation, creep resistance, weather resistance, and transparency. The PC / ABS alloy material prepared by blending the above-mentioned ABS and PC materials has been widely used in automotive interior and exterior trims due to its excellent comprehensive performance and wide sources. The automotive interior mainly includes instrument panels, ABCD column decorative panels, central control panels, ceilings, door panel frames, etc., and the exterior is decorated with license plates, tail wings, etc. The car sunroof frame is an important part of the car. However, in some parts made of PC / ABS alloy materials, and high impact strength and high density are required, the usual PC / ABS alloy cannot meet the use requirements. By adding inorganic fillers to PC / ABS alloy, although its density can be increased, the impact strength of the material drops sharply. It is unable to meet the high impact and high density requirements of special parts, which greatly limits the application of PC / ABS alloy in various fields. Summary of the invention

[0003] The object of the present invention is to provide a high-density PC / ABS alloy material for an automobile sunroof frame and a preparation method thereof, so as to solve the problem that the impact resistance of the PC / ABS alloy material is poor.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

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

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

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

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

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

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

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

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

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

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

[0015] A method for preparing a high-density PC / ABS alloy material for an automobile sunroof frame comprises the following steps:

[0016] The first step is to uniformly mix PC resin, ABS resin, barium sulfate, glass fiber, toughening agent, compatibilizer, lubricant and antioxidant according to weight, and blend them in a high-speed mixer at room temperature of 23° C. to obtain a mixed material;

[0017] The second step is to melt-mix, extrude, water-cool and pelletize the mixed material in a twin-screw extruder to obtain a PC / ABS alloy material.

[0018] Further, the temperature of the barrel 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℃, and 240±10℃ from the first zone to the twelfth zone, respectively, the screw speed is 400±50r / min, and the vacuum degree is 0.07MPa-0.1MPa.

[0019] Beneficial effects of the present invention:

[0020] In the present invention, the density of the high-density PC / ABS alloy material for the automobile sunroof frame can be effectively improved by mixing barium sulfate and glass fiber filler in different proportions. The addition of glass fiber can compensate for the influence of barium sulfate on the impact performance of the material. In addition, ethylene-acrylic acid copolymer is used as a compatibilizer to increase the fraction filled in the matrix material, thereby improving the toughness of the high-density PC / ABS alloy material for the automobile sunroof frame. The present invention prepares the high-density PC / ABS alloy material for the automobile sunroof frame by blending and melt extrusion, and has a simple process and strong operability. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work 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, brand ABS 8434;

[0025] Barium sulfate, manufactured by Simon Chemical;

[0026] Glass fiber, the manufacturer is China Jushi, the brand is ECS13-03-510;

[0027] Toughening agent: MBS 722 from Japan Zhongyuan;

[0028] Compatibilizer, Honeywell, ethylene-acrylic acid copolymer;

[0029] Lubricant, choose Italian dipentaerythritol stearate PETS;

[0030] Antioxidants: BASF's 1076 and 168;

[0031] All the materials used are commercially available conventional products.

[0032] Example 1-Example 5

[0033] According to the weight ratio of the following Table 1, PC resin, ABS resin, barium sulfate, glass fiber, toughening agent, compatibilizer, lubricant, and antioxidant were weighed, added into a high-speed mixer, and mixed for 4-6 minutes at a speed of 400-600 rpm / min to obtain a mixed material;

[0034] The mixed material is placed in a twin-screw extruder for extrusion granulation; the temperatures in each temperature zone are 100°C, 220°C, 220°C, 220°C, 240°C, 240°C, 240°C, 240°C, 240°C, 240°C, 240°C, 240°C, the screw speed is 400r / min, and the vacuum degree is (negative pressure) 0.08MPa.

[0035] Table 1

[0036] Raw material components Example 1 Example 2 Example 3 Example 4 Example 5 PC resin 30 35 35 35 40 ABS resin 15 10 10 10 8 Barium sulfate 20 30 25 20 30 Glass Fiber 30 20 25 30 20 Toughening agent 4 5 5 5 6 Compatibilizer 0.3 0.5 0.5 0.5 0.6 Lubricants 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 Example 1-Comparative Example 5

[0038] According to the weight ratio of the following Table 2, PC resin, ABS resin, barium sulfate, glass fiber, toughening agent, compatibilizer, lubricant, and antioxidant were weighed, added into a high-speed mixer, and mixed for 4-6 minutes at a speed of 400-600 rpm / min to obtain a mixed material;

[0039] The mixed material is placed in a twin-screw extruder for extrusion granulation; the temperatures in each temperature zone are 100°C, 220°C, 220°C, 220°C, 240°C, 240°C, 240°C, 240°C, 240°C, 240°C, 240°C, 240°C, the screw speed is 400r / min, and the vacuum degree is (negative pressure) 0.08MPa.

[0040] Table 2

[0041] Raw material components Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 PC resin 35 35 35 35 35 ABS resin 10 10 10 10 10 Barium sulfate 50 40 10 - 25 Glass Fiber - 10 40 50 25 Toughening agent 5 5 5 5 5 Compatibilizer 0.5 0.5 0.5 0.5 - Lubricants 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 tests were performed on the samples prepared in Examples 1 to 5 and Comparative Examples 1 to 5:

[0043] Density is measured according to standard GB / T 1033.1-2008;

[0044] The tensile strength is measured according to the standard tensile strength GB / T 1040.2-2022;

[0045] The bending strength is measured according to standard GB / T 9341-2008;

[0046] The notched Izod impact strength is measured according to standard GB / T 1043.1-2008;

[0047] The results are shown in Table 3:

[0048] Table 3

[0049]

[0050]

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

[0052] Adding barium sulfate and glass fiber filler can effectively improve the density of the alloy material. Barium sulfate has a better effect on improving the density of the material, but the addition of barium sulfate will cause a significant decrease in the impact performance of the material (cantilever beam notch impact ≤3kJ / m 2 ), which cannot meet the molding requirements of the material (cantilever beam notch impact ≥8kJ / m 2 ); the impact performance of the material with only glass fiber filler can meet the molding requirements, but the density of the material is low; if only one filler is added, the impact performance and density of the material cannot meet customer needs at the same time.

[0053] From the comparison of the test results of Comparative Example 5 and Example 2, it can be seen that:

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

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

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

Claims

1. A high-density PC / ABS alloy material for automobile sunroof frame, characterized in that: The invention comprises the following raw materials in parts by weight: 30-40 parts of PC resin, 8-15 parts of ABS resin, 20-30 parts of barium sulfate, 20-30 parts of glass fiber, 4-6 parts of toughening agent, 0.3-0.6 parts of antioxidant, 0.3-0.6 parts of compatibilizer and 0.2-0.4 parts of lubricant.

2. The high-density PC / ABS alloy material for automobile sunroof frame according to claim 1, characterized in that: The mass ratio of the barium sulfate to the glass fiber is 3:2-2:

3.

3. The high-density PC / ABS alloy material for automobile sunroof frame according to claim 1, characterized in that: The PC resin is aliphatic polycarbonate or aromatic polycarbonate, and has a melt flow index of 3-35 g / 10 min at 300° C. and 1.2 kg.

4. The high-density PC / ABS alloy material for automobile sunroof frame according to claim 1, characterized in that: The ABS resin has a melt index of 15-25 g / 10 min at 220° C. and 10 kg.

5. The high-density PC / ABS alloy material for automobile sunroof frame according to claim 1, characterized in that: The mesh size of the barium sulfate is 7000-12000 mesh.

6. The high-density PC / ABS alloy material for automobile sunroof frame according to claim 1, characterized in that: The glass fiber has a diameter of 8 to 15 μm and a length of 2 to 7 mm.

7. The high-density PC / ABS alloy material for automobile sunroof frame according to claim 1, characterized in that: The toughening agent is at least one of ABS high rubber powder, MBS and EBS; The lubricant is ethylene-acrylic acid copolymer; The antioxidant is a phosphite antioxidant.

8. The high-density PC / ABS alloy material for automobile sunroof frame according to claim 7, characterized in that: The phosphite antioxidant is at least one of a phenol-free phosphite antioxidant, a low-phenol phosphite antioxidant, and a phenol-containing phosphite antioxidant.

9. A method for preparing a high-density PC / ABS alloy material for a car sunroof frame as claimed in any one of claims 1 to 8, characterized in that: The steps include: The first step is to uniformly mix PC resin, ABS resin, barium sulfate, glass fiber, toughening agent, compatibilizer, lubricant and antioxidant according to weight, and blend them in a high-speed mixer at room temperature of 23° C. to obtain a mixed material; The second step is to melt-mix, extrude, water-cool and pelletize the mixed material in a twin-screw extruder to obtain a PC / ABS alloy material.

10. The method for preparing a high-density PC / ABS alloy material for an automobile sunroof frame according to claim 9, characterized in that: The temperatures of the barrel of the extruder from the first zone to the twelfth zone are 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℃, the screw speed is 400±50r / min, and the vacuum degree is 0.07MPa-0.1MPa.

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