ABS material suitable for outdoor use and preparation method thereof

Abstract

The present invention relates to an ABS material suitable for outdoor use and a preparation method thereof, wherein the ABS material comprises the following components and weight portions: 70-85 parts of ABS resin, 5-10 parts of light shielding agent, 5-10 parts of surface modifier, 5-10 parts of toughening agent, and 0.1-1 parts of other auxiliary agents; the preparation method comprises the following steps: dissolving the surface modifier and the light shielding agent in 40-60°C distilled water and mixing and stirring, performing a pre-reaction, filtering and drying after the reaction is completed, stirring the mixture with the ABS resin, toughening agent, and other auxiliary agents in a mixing barrel, and extruding and granulating the mixture through a twin-screw extruder to obtain an ultra-high weather-resistant ABS material suitable for outdoor use. Compared with the prior art, the present invention avoids the problems such as discoloration of the ABS material during outdoor use, and the ABS material has excellent physical properties such as impact resistance, can be widely used in equipment such as outdoor charging pile housings and outdoor antenna housings, extends product service life, reduces environmental pollution and waste of resources, and has broad application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer blending and polymer molding processing, and in particular to an ABS material suitable for outdoor use and a preparation method thereof. Background Art

[0002] ABS resin has excellent mechanical properties and is easy to process by injection molding, making it widely used in industries such as automobiles and home appliances. However, due to its poor weather resistance, ABS's double bonds are destroyed under sunlight, resulting in discoloration and other failures, which limits its performance in outdoor use.

[0003] Existing methods for improving the weather resistance of ABS materials typically involve adding organic UV screens, commonly known as UV absorbers, to reduce sunlight damage to the ABS substrate. However, this method is ineffective and can easily cause discoloration and failure during outdoor use, failing to meet outdoor requirements.

[0004] Another method for improving the weather resistance of ABS is to add nano-ZnO and TiO2 to reflect and shield light. However, ZnO and TiO2 have different shielding effects on different wavelengths, resulting in limited effectiveness. When used alone, light-shielding agents often require a large addition, degrading the physical properties of the ABS material and failing to meet application requirements. Summary of the Invention

[0005] The purpose of the present invention is to provide an ABS material suitable for outdoor use and a preparation method thereof.

[0006] The object of the present invention can be achieved by the following technical solution: An ABS material suitable for outdoor use comprises the following components in parts by weight:

[0007]

[0008] Preferably, the ABS material includes 70-80 parts of ABS resin.

[0009] Preferably, the relative molecular weight of the ABS resin is 80,000-150,000.

[0010] More preferably, the rubber content in the ABS resin is 5-30 wt%, the acrylonitrile content is 10-30 wt%, and the styrene content is 40-70 wt%.

[0011] Preferably, the light shielding agent is zinc orthotitanate, and the average particle size Dv50 of the powder is 1-2 μm, which is a spinel phase. This particle size range is easy to process, not prone to agglomeration, and does not affect the physical properties of the resin substrate.

[0012] Preferably, the surface modifier is ethylene-methyl acrylate-glycidyl methacrylate terpolymer (EMA-GMA).

[0013] More preferably, the ethylene-methyl acrylate-glycidyl methacrylate ternary random copolymer has a methyl acrylate content of 25-35 wt %. The ethylene-methyl acrylate-glycidyl methacrylate ternary random copolymer has high reactivity and can react with -OH, -COOH, and -NH2.

[0014] More preferably, the content of methyl acrylate in the ethylene-methyl acrylate-glycidyl methacrylate random ternary copolymer is 30 wt%.

[0015] Preferably, the toughening agent is one or more of MBS, EMA, SEBS, and SBS.

[0016] Preferably, the other additives include lubricants, antioxidants, and ultraviolet absorbers.

[0017] A method for preparing the above-mentioned ABS material suitable for outdoor use specifically comprises the following steps:

[0018] (a) preparing materials according to the formula, dissolving the surface modifier and the light shielding agent in 40-60°C distilled water, mixing and stirring, and performing a pre-reaction. After the reaction is completed, the mixture is filtered and dried;

[0019] (b) The mixture obtained in step (a) is uniformly stirred with ABS resin, toughening agent, and other additives, and the mixture is melted and extruded into granules through a twin-screw extruder to obtain the ABS material.

[0020] Preferably, the barrel temperature of the twin-screw extruder is 180-220° C., the screw speed is 200-600 rpm, and the pressure is 1.5-2.5 MPa.

[0021] Preferably, during the pre-reaction, stirring is performed slowly to avoid agglomeration of the light shielding agent, and the reaction is carried out for 3 to 5 hours.

[0022] More preferably, the pre-reaction time is 4 hours.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] 1. The present invention combines a light shielding agent with a surface modifier, so that the light shielding agent is evenly distributed on the surface of the product, forming a dense light shielding layer that blocks sunlight, thereby avoiding problems such as discoloration of ABS materials during outdoor use;

[0025] 2. The present invention addresses the high weather resistance requirements of ABS materials for outdoor use, combines the advantages of ZnO and TiO2, selects zinc titanate as a broad-spectrum light shielding agent, which has a wider light shielding band and better shielding effect. At the same time, a surface modifier EMA-GMA is added, and grafting is performed through a pre-reaction of the surface modifier and the light shielding agent. Because EMA has poor compatibility with ABS and a small molecular weight, it migrates to the surface during injection molding. The grafted zinc titanate also covers the surface of the product, forming a dense light shielding layer, which plays a protective role and reduces the amount of light shielding agent used. This makes the ABS have extremely high weather resistance and impact resistance, meeting the requirements of outdoor use.

[0026] 3. The ABS material of the present invention has excellent physical properties such as impact resistance, and can be widely used in outdoor charging pile housings, outdoor antenna housings and other equipment, extending product service life, reducing environmental pollution and resource waste, and has broad application prospects. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below. The following embodiments are implemented based on the technical solutions of the present invention, and provide detailed implementation methods and specific operating processes. However, the protection scope of the present invention is not limited to the following embodiments.

[0028] The following examples and comparative examples used the following raw materials: ABS8391 ABS resin, manufactured by Gaoqiao Petrochemical; zinc orthotitanate, manufactured by Jinyi New Materials Co., Ltd., as a light-shielding agent; ethylene-methyl acrylate-glycidyl methacrylate ternary random copolymer (EMA-GMA), manufactured by Rizhisheng Fine Chemicals; MBS and EM500, manufactured by LG Chemicals as toughening agents; and other additives, including antioxidant B900 (Ciba Specialty Chemicals), ultraviolet absorber Tinuvins UVP (Ciba), and lubricant barium stearate, with the weight ratio of these additives being 1:1:1. Titanium dioxide and zinc oxide were commercially available.

[0029] The ABS resins prepared in Examples 1-5 and Comparative Examples 1-4 were dried at 80°C for 5 hours and then injection molded into standard property bars and weathering test specimens (50 mm x 30 mm x 3 mm) under the same injection molding conditions according to ASTM standards. Weathering was performed using a BGD 856 UV aging chamber, and color difference was assessed using an X-Rite SP64 spectrophotometer. Specific test standards and conditions are shown in Table 1.

[0030] Table 1

[0031]

[0032]

[0033] Example 1

[0034] This embodiment provides an ultra-high weather-resistant ABS material suitable for outdoor use and a preparation method thereof, and the specific steps are as follows:

[0035] (1) Weigh each component according to the weight ratio in Table 2;

[0036] (2) dissolving the surface modifier and the light shielding agent in 60°C distilled water and stirring them for pre-reaction. The reaction was continued for 4 hours. Stirring was carried out slowly during the reaction to prevent the UV shielding agent from agglomerating. After the reaction was completed, the mixture was filtered and dried for later use.

[0037] (3) The mixture obtained in step (2) is uniformly stirred with ABS resin, toughening agent, and other additives in a mixing barrel to obtain a mixture.

[0038] The mixed mixture is fed into the main feed of a twin-screw extruder, and a sample is obtained through melt extrusion, cooling, drying, and pelletizing. The twin-screw extruder rotates in the same direction, the aspect ratio of the screw is 40:1, and the screw barrel is provided with a vacuum pumping device and a temperature control device. The feeding section temperature of the twin-screw extruder is 180°C, the plasticizing section temperature is 200°C, the homogenizing section temperature is 220°C, the screw speed is 400rpm, and the pressure is 2.5MPa.

[0039] Example 2

[0040] This embodiment provides an ultra-high weather-resistant ABS material suitable for outdoor use and a preparation method thereof. The weight proportions of the raw materials are shown in Table 2, and the preparation method is the same as in Example 1.

[0041] Example 3

[0042] This embodiment provides an ultra-high weather-resistant ABS material suitable for outdoor use and a preparation method thereof. The weight proportions of the raw materials are shown in Table 2, and the preparation method is the same as in Example 1.

[0043] Example 4

[0044] This embodiment provides an ultra-high weather-resistant ABS material suitable for outdoor use and a preparation method thereof. The weight proportions of the raw materials are shown in Table 2, and the preparation method is the same as in Example 1.

[0045] Example 5

[0046] This embodiment provides an ultra-high weather-resistant ABS material suitable for outdoor use and a preparation method thereof. The weight proportions of the raw materials are shown in Table 2, and the preparation method is the same as in Example 1.

[0047] Comparative Example 1

[0048] This embodiment provides an ABS material and a preparation method thereof. The weight proportions of the raw materials are shown in Table 2. Titanium dioxide is used instead of zinc titanate, and the same pre-reaction is carried out with the surface modifier. The preparation method is the same as in Example 1.

[0049] Comparative Example 2

[0050] This comparative example provides an ABS material and a preparation method thereof. The weight proportions of the raw materials are shown in Table 2. Zinc oxide is used instead of zinc titanate, and the same pre-reaction is carried out with the surface modifier. The preparation method is the same as in Example 1.

[0051] Comparative Example 3

[0052] This comparative example provides an ABS material and a preparation method thereof. The weight proportions of the raw materials are shown in Table 2. The step of adding a surface modifier is omitted. Zinc titanate is stirred with distilled water alone, filtered, and dried for later use. The rest of the preparation method is the same as in Example 1.

[0053] Comparative Example 4

[0054] This comparative example provides an ABS material and a preparation method thereof. The weight proportions of the raw materials are shown in Table 2. The preparation method is the same as that of Example 1.

[0055] Table 2

[0056]

[0057]

[0058] The physical properties and light resistance test results of the ABS resins of Examples 1 to 5 and Comparative Examples 1 to 4 are shown in Table 3 below.

[0059] Table 3

[0060]

[0061] Note: ΔE uses D65 standard light source, d / 8°, 10° observation angle, including specular reflection, and 8mm aperture.

[0062] The test results of Examples 1-5 and Comparative Examples 1-4 in Table 3 show that after the pre-reaction of the light shielding agent with the surface modifier, the shielding agent is concentrated on the surface of the product, providing a good shielding effect and significantly improving the material's weather resistance. At the same time, the material has excellent mechanical properties, meeting the requirements for outdoor use.

[0063] The above description of the embodiments is intended to facilitate understanding and use of the invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above-described embodiments. 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 scope of protection of the present invention.

Claims

1. An ABS material suitable for outdoor use, characterized in that: It comprises the following components in parts by weight: The light shielding agent is zinc titanate, the average particle size Dv50 of the powder is 1 to 2 μm, and it is a spinel phase; The surface modifier is a ternary random copolymer of ethylene-methyl acrylate-glycidyl methacrylate.

2. The ABS material suitable for outdoor use according to claim 1, characterized in that: The relative molecular weight of the ABS resin is 80,000-150,000.

3. The ABS material suitable for outdoor use according to claim 2, characterized in that: The rubber content of the ABS resin is 5-30wt%, the acrylonitrile content is 10-30wt%, and the styrene content is 40-70wt%.

4. The ABS material suitable for outdoor use according to claim 1, characterized in that: In the ethylene-methyl acrylate-glycidyl methacrylate ternary random copolymer, the content of methyl acrylate is 25-35wt%.

5. The ABS material suitable for outdoor use according to claim 1, characterized in that: The toughening agent is one or more of MBS, EMA, SEBS and SBS.

6. The ABS material suitable for outdoor use according to claim 1, characterized in that: The other additives include lubricants, antioxidants, and ultraviolet absorbers.

7. A method for preparing an ABS material suitable for outdoor use according to any one of claims 1 to 6, characterized in that: The specific steps include: (a) preparing materials according to the formula, dissolving the surface modifier and the light shielding agent in 40-60°C distilled water, mixing and stirring, and performing a pre-reaction. After the reaction is completed, the mixture is filtered and dried; (b) The mixture obtained in step (a) is uniformly stirred with ABS resin, toughening agent, and other additives, and the mixture is melted and extruded into granules through a twin-screw extruder to obtain the ABS material.

8. The method for preparing an ABS material suitable for outdoor use according to claim 7, characterized in that: The barrel temperature of the twin-screw extruder is 180-220° C., the screw speed is 200-600 rpm, and the pressure is 1.5-2.5 MPa.

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