High-toughness and high-fluidity PAABS alloy material and preparation method thereof

Abstract

The invention discloses a high-toughness ABS (Acrylonitrile Butadiene Styrene) material capable of being used for automotive interiors and a preparation method thereof. The preparation method comprises the following steps: 1) weighing 45-55% of PA (Polyamide) resin, 25-35% of ABS, 5-10% of compatilizer, 1-3% of antioxidant, 1-2% of light stabilizer, 1-2% of toner and 5-15% of flexibilizer, adding into a high-speed mixer, and uniformly mixing; and 2) adding the completely and uniformly mixed materials into a main feeding port, and melting, homogenizing, shearing, extruding and granulating through an extruder to obtain a final product. The PAABS prepared by the invention has the characteristics of ultrahigh normal-temperature toughness, ultrahigh low-temperature toughness, capability of changing material colors according to different toners, high toughness, high flowability and high processability, and can be used for daily plastic products such as automotive interiors and mobile phone shells as appearance parts without paint spraying.

Description

Technical Field

[0001] The invention relates to the field of plastics with special properties, and in particular to a PAABS alloy material with ultra-high toughness and high fluidity and a preparation method thereof. Background Art

[0002] PAABS is generally a plastic alloy obtained by blending polyamide with acrylonitrile, butadiene and styrene terpolymers, with excellent comprehensive performance. PA (polyamide) has excellent chemical corrosion resistance and thermal stability, while ABS (acrylonitrile-butadiene-styrene copolymer) has good dimensional stability and low-temperature impact resistance. Blending the two to form PA / ABS alloy can achieve complementary advantages and improve the overall performance of the material. PA / ABS alloy combines the characteristics of crystalline materials and amorphous materials, and obtains good shock absorption and sound absorption properties, which is very suitable for applications such as automotive interiors. This material has good dimensional stability and processability, and has a wide range of molding and processing processes. It can be injection molded, extruded, calendered, blow molded, electroplated, etc., and is widely used in automobiles, home appliances, daily products, military industries and other industries. In the automotive industry, with the development of the times, people have higher and higher requirements for automotive interiors, and the competition between OEMs is fierce. In order to meet high part performance and excellent processing performance, a PAABS material with high toughness and high fluidity for easy injection molding has been developed. High toughness can; when PAABS has excellent fluidity, it has better processability than other materials and a wider processing window. As the automotive industry's demand for lightweight and energy-saving increases, plastic materials are increasingly being used to replace metal parts due to their lightweight properties. PA / ABS alloy has a low density, which can effectively reduce costs and weight, and is in line with the trend of lightweighting automobiles. With the increase in environmental awareness, the development of recyclable and environmentally friendly materials has become a trend. PA / ABS alloy, as a plastic alloy, is easier to recycle and process than metal materials, which helps reduce environmental pollution.

[0003] In summary, the development of PA / ABS alloy plastics with high toughness and high fluidity is of great significance for promoting the progress of material science, meeting the needs of industrial applications, and promoting environmental protection and sustainable development. At present, in order to achieve the purpose of lightweight, some automotive interiors usually optimize the thickness and weight of parts. However, reducing the thickness of parts and simplifying the reinforcement of parts also means reducing the mechanical properties of parts, especially impact toughness. Therefore, it is very practical to develop a PAABS alloy material with high toughness. Summary of the invention

[0004] The purpose of the present invention is to provide a PAABS alloy material with high toughness and high fluidity, which has ultra-high toughness and heat resistance, high fluidity and excellent comprehensive performance, can be used for automotive interior appearance parts to meet the use requirements of different parts, and has a good appearance without the need for painting, which can achieve the effect of cost reduction and environmental protection.

[0005] To achieve the above purpose, the technical solution used in the present invention is as follows:

[0006] A PA / ABS alloy plastic with high toughness and high fluidity, prepared by the following components in percentage:

[0007] PA resin 45-55%,

[0008] ABS resin 25%-35%,

[0009] Compatibilizer 5%-10%,

[0010] Antioxidant 1%-3%,

[0011] Light stabilizer 1%-2%,

[0012] Color powder 1%-2%,

[0013] Toughener 5%-15%.

[0014] in,

[0015] The PA resin is one of single 6 nylon or double 6 nylon, and its viscosity is 2.4±5.

[0016] The ABS resin is a bulk or emulsion ABS, and under the test condition of 220° C.*10kg, the melt flow rate must be ≥10g / 10min.

[0017] The compatibilizer is a styrene-N-phenylmaleimide-maleic anhydride terpolymer.

[0018] The antioxidant is a compound of antioxidant 1010 and antioxidant 168, and the compounding ratio is 1010:168=1:2.

[0019] The light stabilizer is a hindered amine light stabilizer.

[0020] The color powder can be matched according to actual needs. The color powder used in this patent is black masterbatch.

[0021] The toughening agent is a compound of a thermoplastic elastomer obtained by in-situ polymerization of ethylene and octene using a metallocene catalyst and a random terpolymer obtained by polymerization of ethylene, acrylate and glycidyl methacrylate in a high-pressure reactor, and the compounding ratio is 1010:168=1:1.2.

[0022] Another object of the present invention is to provide a method for preparing a PAABS alloy material with high toughness and high fluidity. According to the ratio, various required raw materials except mica flakes are mixed evenly in a high-speed mixer and then added to the main feeding port of a twin-screw extruder, while the mica flakes are added from the side feeding port. After melt plasticization and shear mixing, the materials are extruded, water-cooled and granulated.

[0023] As a common material for automotive interiors, PAABS is widely used in automotive parts, electronic appliances, household appliances and other fields due to its excellent comprehensive performance and relatively low price. It replaces some metal materials and expands the application range of engineering plastics. It is usually used in some scenes involving wear resistance and parts with complex structures. The design of high-fluidity PAABS can optimize the processing window, and then add appropriate additives and match the appropriate processing technology. High-toughness and high-fluidity PAABS materials can be directly used for interior appearance parts through different leather grains and base colors. It can maintain a good appearance without painting and can be used as a new type of appearance parts material.

[0024] The present invention has the following beneficial effects:

[0025] 1. In the present invention, suitable ABS and mica sheets with suitable size and surface treatment are selected, and suitable processes are used to develop a special appearance material with black background and white dots effect, which can be used for automobile interior appearance parts, and the surface does not need to be painted to achieve a high-gloss appearance effect.

[0026] 2. The antioxidant and light stabilizer added in the present invention enable the material to meet the light resistance test requirements of automotive interior decoration parts.

[0027] 3. The heat-resistant agent and toughening agent added in the present invention, especially the toughening agent used, have a certain volume expansion effect, which positively improves the thermal stability and toughness of the material and meets the basic mechanical properties as an automotive interior decoration part.

[0028] 4. The mica flakes added in the present invention need to be of suitable size and have their surfaces specially treated with coupling agents.

[0029] 5. The preparation method of the present invention is to mix various required raw materials in a high-speed mixer according to the ratio, add them to the main feeding port of the twin-screw extruder, melt plasticize, shear and mix, and then extrude, water cool and granulate to obtain an alloy plastic with good appearance, stable and excellent performance. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the embodiments, but they are not intended to limit the present invention.

[0031] Embodiments of the present invention

[0032] The following products are from the following manufacturers: PA resin: Sinopec; ABS resin: Tianjin Dagu, Trinseo; toughening agent: Nippon Denki Kagaku; antioxidant 1010 and antioxidant 168: BASF; light stabilizer: Jihong Chemical; color powder: homemade; compatibilizer: Kumho, Korea

[0033] Example 1: PA resin 50%, ABS resin 17%, compatibilizer 0%, antioxidant 1%, light stabilizer 1%, color powder 1%, toughening agent A. 30%.

[0034] According to the ratio, various required raw materials are mixed evenly in a high-speed mixer, and then added to the main feed port of the twin-screw extruder. After melting, plasticizing, shearing and mixing, extrusion, water cooling and granulation, the alloy plastic with good appearance, stable and excellent performance is obtained.

[0035] Example 2: PA resin 50%, ABS resin 38%, compatibilizer A.5%+compatibility agent B.5%, antioxidant 1%, light stabilizer 1%, color powder 1%, toughening agent 0%.

[0036] According to the ratio, various required raw materials are mixed evenly in a high-speed mixer, and then added to the main feed port of the twin-screw extruder. After melting, plasticizing, shearing and mixing, extrusion, water cooling and granulation, the alloy plastic with good appearance, stable and excellent performance is obtained.

[0037] Example 3: PA resin 50%, ABS resin 43%, compatibilizer B.5%, antioxidant 1%, light stabilizer 1%, color powder 1%, toughening agent 0%.

[0038] According to the ratio, various required raw materials are mixed evenly in a high-speed mixer, and then added to the main feed port of the twin-screw extruder. After melting, plasticizing, shearing and mixing, extrusion, water cooling and granulation, the alloy plastic with good appearance, stable and excellent performance is obtained.

[0039] Example 4: PA resin 50%, ABS resin 27%, compatibilizer A.5%, antioxidant 1%, light stabilizer 1%, color powder 1%, toughening agent A.15%.

[0040] According to the ratio, various required raw materials are mixed evenly in a high-speed mixer, and then added to the main feed port of the twin-screw extruder. After melting, plasticizing, shearing and mixing, extrusion, water cooling and granulation, the alloy plastic with good appearance, stable and excellent performance is obtained.

[0041] Example 5: PA resin 50%, ABS resin 23%, compatibilizer A.5%+compatibility agent B.5%, antioxidant 1%, light stabilizer 1%, color powder 1%, toughening agent A.5%+toughening agent B.10%.

[0042] According to the ratio, various required raw materials are mixed evenly in a high-speed mixer, and then added to the main feed port of the twin-screw extruder. After melting, plasticizing, shearing and mixing, extrusion, water cooling and granulation, the alloy plastic with good appearance, stable and excellent performance is obtained.

[0043] Comparative Example 1: PA resin 50%, ABS resin 23%, compatibilizer B.5%, antioxidant 1%, light stabilizer 1%, color powder 1%, toughening agent A.5% + toughening agent B.10%

[0044] According to the ratio, various required raw materials are mixed evenly in a high-speed mixer, and then added to the main feed port of the twin-screw extruder. After melting, plasticizing, shearing and mixing, extrusion, water cooling and granulation, the alloy plastic with good appearance, stable and excellent performance is obtained.

[0045] Comparative Example 2: PA resin 50%; ABS resin 31%; compatibilizer A.2% + compatibilizer B.5%; antioxidant 1%; light stabilizer 1%; color powder 1%; toughening agent A.7% + toughening agent B.5%.

[0046] According to the ratio, various required raw materials are mixed evenly in a high-speed mixer, and then added to the main feed port of the twin-screw extruder. After melting, plasticizing, shearing and mixing, extrusion, water cooling and granulation, the alloy plastic with good appearance, stable and excellent performance is obtained.

[0047] The materials prepared in the above Examples 1-5 and Comparative Examples 1-2 were made into specimens respectively, and then the flexural strength, flexural modulus, notched impact strength, low-temperature notched impact strength, and Vicat temperature (B50) thereof were tested according to ISO standards. The specific data are shown in Table 1 below.

[0048] Table 1 Example test results

[0049]

[0050] From the results in Table 1, it can be seen that compared with the common ABS material (Comparative Example 1), the PAABS prepared by the present invention with the addition of toughening agent and compatibilizer has greatly improved comprehensive performance, and Example 5 has the best comprehensive performance, with high toughness and good heat resistance while having a special appearance. Compared with the high-performance ABS without toughening agent (Comparative Example 2), the toughness and fluidity of Example 5 with the addition of toughening agent are improved to a certain extent, but the Vicat softening is not much reduced, which is due to the fact that the compound toughening agent used has a certain compatibilizing effect while improving the toughness. In terms of cooperation with the preparation process, the toughening agent and the compatibilizer form a synergistic effect, and the PAABS alloy with high room temperature toughness, high low temperature toughness and high fluidity that can be used for automobile interiors is successfully prepared, which has a good application prospect in the future automotive field or other plastic parts with such needs.

[0051] The above description of the embodiments is to facilitate the understanding and application of the present invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the embodiments herein, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A mica-filled, spray-free, high-toughness ABS material, characterized by: It is prepared from the following raw materials in percentage: PA resin 45-55%, ABS resin 25%-35%, Compatibilizer 5%-10%, Antioxidant 1%-3%, Light stabilizer 1%-2%, Color powder 1%-2%, Toughener 5%-15%.

2. The high toughness and high fluidity PAABS alloy material as claimed in claim 1, characterized in that: The PA resin is one of single 6 nylon or double 6 nylon, and its viscosity is 2.4±5.

3. The high toughness and high fluidity PAABS alloy material as claimed in claim 1, characterized in that: The ABS resin is a bulk or emulsion ABS, and under the test condition of 220° C.*10kg, the melt flow rate must be ≥10g / 10min.

4. The high toughness and high fluidity PAABS alloy material as claimed in claim 1, characterized in that: The compatibilizer is a styrene-N-phenylmaleimide-maleic anhydride terpolymer.

5. The high toughness and high fluidity PAABS alloy material as claimed in claim 1, characterized in that: The antioxidant is a compound of antioxidant 1010 and antioxidant 168, and the compounding ratio is 1010:168=1:

2.

6. The high toughness and high fluidity PAABS alloy material as claimed in claim 1, characterized in that: The light stabilizer is a hindered amine light stabilizer.

7. The high toughness and high fluidity PAABS alloy material as claimed in claim 1, characterized in that: The color powder can be matched according to actual needs. The color powder used in this patent is black masterbatch.

8. The high toughness and high fluidity PAABS alloy material as claimed in claim 1, characterized in that: The toughening agent is a compound of a thermoplastic elastomer obtained by in-situ polymerization of ethylene and octene using a metallocene catalyst and a random terpolymer obtained by polymerization of ethylene, acrylate and glycidyl methacrylate in a high-pressure reactor, and the compounding ratio is 1010:168=1:1.

2.

9. A method for preparing the high-toughness, high-fluidity PAABS alloy material according to any one of claims 1 to 8, characterized in that: According to the ratio, various required raw materials are mixed evenly in a high-speed mixer, and then added to the main feeding port of the twin-screw extruder. After melt plasticization, shear mixing, extrusion, water cooling and granulation.

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