Light-aging-resistant flame-retardant ABS (Acrylonitrile Butadiene Styrene) material for electric fitting box and preparation method thereof

Abstract

The invention relates to the technical field of high polymer materials, in particular to a light-aging-resistant flame-retardant ABS material for an electric fitting box and a preparation method of the light-aging-resistant flame-retardant ABS material. Comprising the following raw materials: ABS resin, AS resin, ABS high rubber powder, CPE, bromotriazine, carrier-free antimony trioxide master batch, a flame retardant synergist, precipitated barium sulphate, titanium dioxide, a main antioxidant, an auxiliary antioxidant, a lubricant, an anti-dripping agent, a dispersing agent and an ultraviolet absorbent. The material has excellent flame retardant property, and the synergistic effect of the flame retardant components such as the bromotriazine and the like reaches a high flame retardant grade; the ultraviolet absorbent and the titanium dioxide can delay aging and stabilize the color; the melt flow rate is high, and the fluidity is improved through cooperation of high-melt-index ABS and low-molecular-weight AS resin; the mechanical property is good, and the raw materials cooperate to guarantee strength and toughness; the appearance quality is good, pocking marks are avoided, and the glossiness is good. The preparation process is simple, and conventional equipment and reasonable parameters ensure stability and operability.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, in particular to a light-aging-resistant and flame-retardant ABS material for electrical boxes and a preparation method thereof. Background Art

[0002] Acrylonitrile-butadiene-styrene (ABS) plastic offers excellent impact, thermal, chemical, and abrasion resistance, as well as excellent processability, making it widely used in automobiles, home appliances, office supplies, and other fields. However, ABS has an oxygen index of only 18%, making it highly flammable and limiting its application in high-temperature and high-pressure environments. Therefore, flame-retardant modification of ABS is necessary. The polybutadiene rubber in ABS resin contains unsaturated carbon-carbon double bonds, which are susceptible to reactions with atmospheric light, heat, oxygen, and moisture, forming chromogenic groups. This can lead to discoloration, powdering, cracking, and decreased mechanical properties. Furthermore, the large amount of brominated flame retardants added to flame-retardant ABS easily generates acidic substances and free radicals during processing, further initiating and promoting reactions in the ABS resin, resulting in even worse weather resistance.

[0003] Environmental protection and safety are gaining increasing attention in modern industrial production. The material selection for air conditioner electrical boxes, a key component in both residential and commercial air conditioning systems, directly impacts product performance and service life. While traditional electrical box materials offer excellent mechanical and processability, they often suffer from environmental and flame retardancy deficiencies. Due to the persistently high price of antimony, costs urgently need to be reduced. As flame retardant technologies, more and more manufacturers are opting for synergistic flame retardancy, which helps reduce costs and increase efficiency. Summary of the Invention

[0004] The object of the present invention is to provide a light-aging-resistant flame-retardant ABS material for electrical boxes and a preparation method thereof, so as to solve the problems of poor performance and short service life of existing electrical boxes in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A light-aging-resistant and flame-retardant ABS material for electrical boxes, comprising the following raw materials in parts by weight: 40-50 parts of ABS resin; 25-30 parts of AS resin; 7-10 parts of ABS high-glue powder; CPE 2 to 5 copies; 13-17 parts of bromotriazine; 2-4 parts of uncarrier antimony trioxide masterbatch; 3-5 parts of flame retardant synergist; Precipitate 1-2 parts of barium sulfate; 0.2-0.4 parts of titanium dioxide; 0.1-0.4 parts of primary antioxidant; 0.2-0.8 parts of auxiliary antioxidant; 0.1-0.4 parts of lubricant; 0.1-0.4 parts of anti-dripping agent; 0.2-0.6 parts of dispersant; 0.3 to 0.5 parts of ultraviolet absorber.

[0006] Preferably, 1 to 2 parts of precipitated barium sulfate are included as filler.

[0007] Preferably, the ABS resin is a high melt index ABS resin.

[0008] Preferably, the AS resin is a low molecular weight AS resin.

[0009] Preferably, the flame retardant synergist is a compound that can synergistically improve flame retardancy, including halogen compounds and phosphorus-nitrogen compounds.

[0010] On the other hand, the present invention also provides a method for preparing a light-resistant and flame-retardant ABS material for an electrical box, comprising the above-mentioned light-resistant and flame-retardant ABS material for an electrical box, and specifically comprising the following steps: S10: weighing the raw materials in proportion; S20: uniformly mixing ABS resin, AS resin, ABS high-rubber powder, bromotriazine, carrier-free antimony trioxide masterbatch or antimony oxide masterbatch, flame retardant synergist, titanium dioxide, optional ultraviolet absorber and optional precipitated barium sulfate in a high-pressure mixer; S30: feeding the mixed materials into a twin-screw extruder for melt blending and extrusion, while adding a primary antioxidant, a secondary antioxidant, a lubricant and an anti-dripping agent; S40: The extrudate is cooled and pelletized to obtain the light-resistant and flame-retardant ABS material.

[0011] Preferably, in step S30, the extruder temperature is set to 180-230° C., and the screw speed is set to 300-500 r / min.

[0012] Preferably, the temperatures of the sections from the feed port to the die of the twin-screw extruder in step S30 are: 180-190°C, 190-200°C, 200-210°C, 210-220°C, and 220-230°C, respectively.

[0013] Preferably, the cooling in step S40 is performed by water tank cooling or air cooling, and the cooling temperature is 10-20°C.

[0014] Preferably, the pelletizing in step S40 is to feed the cooled solidified material strips into a pelletizer and cut them into particles of uniform size by a rotating blade or cutting device.

[0015] Compared with existing technologies, the present invention offers the following advantages: Material properties include excellent flame retardancy, with bromotriazine and other flame retardant ingredients working synergistically to achieve a high flame retardancy rating; excellent light aging resistance, with UV absorbers and titanium dioxide delaying aging and stabilizing color; high melt flow rate, with high melt index ABS and low molecular weight AS resin combining to improve flowability; excellent mechanical properties, with the synergistic effects of the various raw materials ensuring strength and toughness; and excellent appearance quality, with no pitting and good gloss. The preparation process is simple, with conventional equipment and appropriate parameters ensuring stability and operability, as detailed below: 1. Excellent flame retardancy and efficient flame retardant system: Bromotriazine is used as a brominated flame retardant, boasting high flame retardancy, low addition requirements, and excellent compatibility with plastic resins. It synergizes with the carrier-free antimony trioxide masterbatch to generate antimony bromide gas at high temperatures, effectively isolating oxygen and achieving vapor-phase flame retardancy. Furthermore, the flame retardant synergist further enhances the flame retardancy, enabling the material to achieve a high flame retardancy rating (e.g., V-0), significantly reducing fire risks and providing a solid foundation for the safe use of electrical boxes in electrical equipment.

[0016] 2. Excellent light aging resistance and synergistic anti-aging mechanism: The addition of UV absorbers can inhibit the early stages of polymer degradation, converting light energy into harmless forms and slowing the material's photoaging process. The appropriate addition of titanium dioxide further reduces color difference after photoaging, enabling the material to maintain excellent color stability under long-term light exposure. This effectively extends the life of the electrical box outdoors or in exposed light, ensuring the durability of the product's appearance and performance.

[0017] 3. High melt flow rate (good fluidity), special resin combination to optimize flow: The combination of a high-melt index ABS resin matrix and a low-molecular-weight AS resin is key to improving fluidity. The low-molecular-weight AS resin, with its high melt index and compatibility with ABS, acts as a lubricant at high temperatures, reducing friction within the system and significantly promoting melt flow. This results in a high melt flow rate (MFR), facilitating smooth mold filling during injection molding. This makes it particularly suitable for the processing of large-area, thin-walled electrical boxes, improving production efficiency, reducing molding defects, and ensuring consistent product quality.

[0018] 4. Good mechanical properties, the formula synergistically ensures mechanical strength: The rational combination of raw material components ensures the material possesses excellent mechanical properties. The addition of ABS high-density rubber powder helps improve the material's toughness. Working together with the other components, it imparts appropriate tensile strength, flexural strength, and impact strength to the material. This meets the structural strength and impact resistance requirements of electrical boxes in daily use, effectively protecting internal electrical components and ensuring that the box is not easily damaged by certain external forces.

[0019] 5. Good appearance quality, raw material selection and process guarantee appearance: Using carrier-free antimony trioxide masterbatch instead of antimony oxide powder, the pre-dispersion effect of the masterbatch ensures a more uniform distribution of the antimony powder, resolving the poor compatibility between antimony oxide and the matrix resin. This effectively prevents pitting during the injection molding process and ensures a smooth surface. Furthermore, the low-molecular-weight AS resin inherently exhibits high surface gloss and transparency, making coloring simple, further enhancing the material's appearance and ensuring a superior appearance quality for the electrical box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they provide further detailed explanation, but do not constitute a limitation of the present invention.

[0021] Figure 1 It is a schematic diagram of the process flow of the present invention. DETAILED DESCRIPTION

[0022] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0023] Example 1 Raw material formula (parts by weight) 44 parts of ABS resin (high melt index ABS resin); 27 parts of AS resin (low molecular weight AS resin); 9 parts of ABS high-glue powder; 4 copies of CPE; 15 parts of bromotriazine; 2 parts of uncarrier antimony trioxide masterbatch; 5 parts of flame retardant synergist (halogen compound and phosphorus nitrogen compound); 1 part of precipitated barium sulfate; 0 parts of titanium dioxide (titanium dioxide was not added in this example, used to compare the effect of titanium dioxide on performance); 0.3 parts of primary antioxidant; 0.5 parts of secondary antioxidant; 0.3 parts of lubricant; 0.3 parts of anti-dripping agent; 0.4 parts of dispersant; 0.3 parts of UV absorber.

[0024] Preparation method S10: Weigh the raw materials according to the above ratio.

[0025] S20: ABS resin, AS resin, ABS high rubber powder, bromotriazine, carrier-free antimony trioxide masterbatch, flame retardant synergist, optional ultraviolet absorber and precipitated barium sulfate are mixed uniformly in a high-speed mixer.

[0026] S30: The mixed materials are fed into a twin-screw extruder for melt blending and extrusion, and the primary antioxidant, secondary antioxidant, lubricant, and anti-drip agent are added simultaneously. The extruder temperature is set to 180-230°C (for example, the temperatures of each section from the feed port to the die are 180-190°C, 190-200°C, 200-210°C, 210-220°C, and 220-230°C, respectively), and the screw speed is 300-500r / min (400r / min is optional).

[0027] S40: After the extrudate is cooled in a water tank at 10-20°C (e.g. 15°C), the solidified material strips are fed into a pelletizer and cut into particles of uniform size by a rotating blade to obtain a light-resistant and flame-retardant ABS material.

[0028] Example 2 Raw material formula (parts by weight) 45 parts of ABS resin (high melt index ABS resin); 28 parts of AS resin (low molecular weight AS resin); 8 parts of ABS high-glue powder; 3 copies of CPE; 16 parts of bromotriazine; 3 parts of uncarrier antimony trioxide masterbatch; 4 parts of flame retardant synergist (halogen compound and phosphorus nitrogen compound); 1.5 parts of precipitated barium sulfate; 0.3 parts of titanium dioxide; 0.2 parts of primary antioxidant; 0.6 parts of secondary antioxidant; 0.2 parts of lubricant; 0.2 parts of anti-dripping agent; 0.3 parts of dispersant; 0.4 parts of UV absorber.

[0029] Preparation method S10: Weigh the raw materials according to the above ratio.

[0030] S20: ABS resin, AS resin, ABS high rubber powder, bromotriazine, carrier-free antimony trioxide masterbatch, flame retardant synergist, titanium dioxide, ultraviolet absorber and precipitated barium sulfate are mixed uniformly in a high-speed mixer.

[0031] S30: The mixed materials are fed into a twin-screw extruder for melt blending and extrusion, and the primary antioxidant, secondary antioxidant, lubricant, and anti-drip agent are added simultaneously. The extruder temperature is set to 180-230°C (the temperatures of each section from the feed port to the die are 180-190°C, 190-200°C, 200-210°C, 210-220°C, and 220-230°C, respectively), and the screw speed is 300-500r / min (350r / min is optional).

[0032] S40: After the extrudate is cooled by air at 10-20°C (e.g. 12°C), the solidified material strips are fed into a pelletizer and cut into particles of uniform size by a rotating cutting device to obtain a light-resistant and flame-retardant ABS material.

[0033] Example 3 Raw material formula (parts by weight) 40 parts of ABS resin (high melt index ABS resin); 25 parts of AS resin (low molecular weight AS resin); 10 parts of ABS high-glue powder; 5 copies of CPE; 13 parts of bromotriazine; 4 parts of uncarrier antimony trioxide masterbatch; 3 parts of flame retardant synergist (halogen compound and phosphorus nitrogen compound); 2 parts of precipitated barium sulfate; 0.2 parts of titanium dioxide; 0.4 parts of primary antioxidant; 0.8 parts of secondary antioxidant; 0.1 part of lubricant; 0.1 part of anti-dripping agent; 0.6 parts of dispersant; 0.5 parts of UV absorber.

[0034] Preparation method S10: Weigh the raw materials according to the above ratio.

[0035] S20: ABS resin, AS resin, ABS high rubber powder, bromotriazine, carrier-free antimony trioxide masterbatch, flame retardant synergist, titanium dioxide, ultraviolet absorber and precipitated barium sulfate are mixed uniformly in a high-speed mixer.

[0036] S30: The mixed materials are fed into a twin-screw extruder for melt blending and extrusion, and the primary antioxidant, secondary antioxidant, lubricant, and anti-drip agent are added simultaneously. The extruder temperature is set to 180-230°C (the temperatures of each section from the feed port to the die are 180-190°C, 190-200°C, 200-210°C, 210-220°C, and 220-230°C, respectively), and the screw speed is 300-500r / min (450r / min is optional).

[0037] S40: After the extrudate is cooled in a water tank at 10-20°C (e.g. 18°C), the solidified material strips are fed into a pelletizer and cut into particles of uniform size by a rotating blade to obtain a light-resistant and flame-retardant ABS material.

[0038] Comparative Example 1 Raw material formula (parts by weight) 44 parts of ABS resin (ordinary ABS resin, non-high melt index); 27 parts of AS resin (ordinary AS resin, not low molecular weight); 9 parts of ABS high-glue powder; 4 copies of CPE; 15 parts of bromotriazine; 2 parts of uncarrier antimony trioxide masterbatch; 5 parts of flame retardant synergist (halogen compound and phosphorus nitrogen compound); 1 part of precipitated barium sulfate; 0.3 parts of titanium dioxide; 0.3 parts of primary antioxidant; 0.5 parts of secondary antioxidant; 0.3 parts of lubricant; 0.3 parts of anti-dripping agent; 0.4 parts of dispersant; 0.3 parts of UV absorber.

[0039] Preparation method S10: Weigh the raw materials according to the above ratio.

[0040] S20: ABS resin, AS resin, ABS high rubber powder, bromotriazine, carrier-free antimony trioxide masterbatch, flame retardant synergist, titanium dioxide, ultraviolet absorber and precipitated barium sulfate are mixed uniformly in a high-speed mixer.

[0041] S30: The mixed materials are fed into a twin-screw extruder for melt blending and extrusion, and the primary antioxidant, secondary antioxidant, lubricant, and anti-drip agent are added at the same time. The extruder temperature is set to 180-230°C (the temperatures of each section from the feed port to the die are 180-190°C, 190-200°C, 200-210°C, 210-220°C, and 220-230°C, respectively), and the screw speed is 300-500r / min (400r / min is optional).

[0042] S40: After the extrudate is cooled in a water tank at 10-20°C (e.g. 15°C), the solidified material strips are fed into a pelletizer and cut into particles of uniform size by a rotating blade to obtain a light-resistant and flame-retardant ABS material.

[0043] Comparative Example 2 Raw material formula (parts by weight) 44 parts of ABS resin (high melt index ABS resin); 27 parts of AS resin (low molecular weight AS resin); 9 parts of ABS high-glue powder; 4 copies of CPE; 15 parts of bromotriazine; 5 parts of uncarrier antimony trioxide powder (use antimony oxide powder directly instead of masterbatch); 5 parts of flame retardant synergist (halogen compound and phosphorus nitrogen compound); 1 part of precipitated barium sulfate; 0.3 parts of titanium dioxide; 0.3 parts of primary antioxidant; 0.5 parts of secondary antioxidant; 0.3 parts of lubricant; 0.3 parts of anti-dripping agent; 0.4 parts of dispersant; 0.3 parts of UV absorber.

[0044] Preparation method S10: Weigh the raw materials according to the above ratio.

[0045] S20: Mix ABS resin, AS resin, ABS high-rubber powder, bromotriazine, carrier-free antimony trioxide powder, flame retardant synergist, titanium dioxide, UV absorber and precipitated barium sulfate in a high-speed mixer (due to the use of antimony oxide powder, it may be more difficult to disperse evenly during the mixing process).

[0046] S30: The mixed materials are fed into a twin-screw extruder for melt blending and extrusion, and the primary antioxidant, secondary antioxidant, lubricant, and anti-drip agent are added at the same time. The extruder temperature is set to 180-230°C (the temperatures of each section from the feed port to the die are 180-190°C, 190-200°C, 200-210°C, 210-220°C, and 220-230°C, respectively), and the screw speed is 300-500r / min (400r / min is optional).

[0047] S40: After the extrudate is cooled in a water tank at 10-20°C (e.g. 15°C), the solidified material strips are fed into a pelletizer and cut into particles of uniform size by a rotating blade to obtain a light-resistant and flame-retardant ABS material.

[0048] Performance Testing The following performance tests were performed on the light aging resistant flame retardant ABS materials prepared in Examples 1-3 and Comparative Examples 1-2: Flame retardant performance: The flame retardant grade of the material is tested in accordance with relevant standards (UL-94 standard).

[0049] Light aging resistance: Through simulated light aging tests, the color difference and mechanical property changes of the material before and after aging are tested. Using a xenon lamp aging test chamber, set certain light intensity, temperature, and humidity conditions. After aging for a certain period of time (500 hours), the color difference, tensile strength, impact strength and other indicators of the material are measured and compared with the pre-aging results.

[0050] Flowability: A melt flow rate meter is used to test the melt flow rate (MFR) of the material to evaluate the fluidity of the material.

[0051] Mechanical properties: Test the tensile strength, flexural strength, impact strength and other mechanical properties of the material using a universal material testing machine.

[0052] Appearance quality: Observe the surface of the sample made of the material to see if there are defects such as pitting, glue deficiency, white fog, etc., and evaluate the appearance quality.

[0053] Comparative analysis: By comparing Examples 1-3 with Comparative Example 1, the effects of using ordinary ABS resin and ordinary AS resin (Comparative Example 1) on material properties, such as fluidity, mechanical properties, and appearance quality, were observed compared with the effects of using high melt index ABS resin and low molecular weight AS resin (Examples 1-3).

[0054] By comparing Examples 1-3 with Comparative Example 2, the differences in material flame retardancy and appearance quality (whether pitting occurs, etc.) between directly using antimony oxide powder (Comparative Example 2) and using carrier-free antimony trioxide masterbatch (Examples 1-3) were analyzed.

[0055] Compare the effects of different raw material formulations (such as different amounts of titanium dioxide added) on various material properties between Examples 1-3, such as the effect of titanium dioxide addition on light aging resistance (color difference change), and the effect of flame retardant synergist content on flame retardant properties. The light-aging-resistant flame-retardant ABS material for electrical boxes of the present invention and the preparation method thereof have the following characteristics: 1. Material properties (1) Excellent flame retardant properties Construction of efficient flame retardant system Brominated triazine is used as a brominated flame retardant, boasting high flame retardancy, low addition requirements, and excellent compatibility with plastic resins. It synergizes with uncarrier antimony trioxide masterbatch to generate antimony bromide gas at high temperatures, effectively isolating oxygen and achieving vapor-phase flame retardancy. Furthermore, the flame retardant synergist further enhances the flame retardancy, enabling the material to achieve a high flame retardancy rating (such as V-0), significantly reducing fire risks and providing a solid foundation for the safe use of electrical boxes in electrical equipment.

[0056] (2) Excellent light aging resistance Synergistic anti-aging mechanisms The addition of UV absorbers inhibits the early stages of polymer degradation, converting light energy into harmless forms and slowing the material's photoaging process. The appropriate addition of titanium dioxide further reduces color difference after photoaging, enabling the material to maintain excellent color stability under long-term light exposure. This effectively extends the life of the electrical box in outdoor or light-exposed environments, ensuring the durability of the product's appearance and performance.

[0057] (3) High melt flow rate (good fluidity) Special resin combination to optimize flow The combination of a high-melt index ABS resin matrix and a low-molecular-weight AS resin is key to improving fluidity. The low-molecular-weight AS resin, with its high melt index and compatibility with ABS, acts as a lubricant at high temperatures, reducing friction within the system and significantly promoting melt flow. This results in a high melt flow rate (MFR), facilitating smooth mold filling during injection molding. This makes it particularly suitable for the processing of large-area, thin-walled electrical boxes, improving production efficiency, reducing molding defects, and ensuring consistent product quality.

[0058] (4) Good mechanical properties Formula synergy ensures mechanical strength The reasonable collocation between each raw material component ensures that the material has good mechanical properties. The addition of ABS high glue powder helps to improve the toughness of the material, and together with other components, the material has appropriate tensile strength, bending strength and impact strength, which can meet the requirements of the electrical box on structural strength and impact resistance in daily use, effectively protect the internal electrical components, and ensure that the electrical box is not easily damaged when subjected to certain external forces.

[0059] (5) Good appearance quality Raw material selection and process guarantee appearance The use of carrier-free antimony trioxide masterbatch instead of antimony trioxide powder makes the distribution of antimony powder more uniform through the pre-dispersing effect of the masterbatch, solves the problem of poor compatibility of antimony trioxide with the base resin, effectively avoids the generation of pitting during injection molding, and ensures the smoothness of the material surface. At the same time, the low molecular weight AS resin itself has high surface gloss and transparency, and the coloring is simple, which further improves the appearance effect of the material, making the electrical box have good appearance quality.

[0060] II. Preparation process (1) Simple and easy process Conventional equipment and step operation The preparation process mainly uses a high-speed mixer to mix raw materials and a twin-screw extruder to melt blend and extrude granulation, which are common equipment and processes in the field of polymer material processing. The operation steps are relatively simple, easy to master and control, do not require complex equipment and special operating conditions, and are convenient for large-scale industrial production.

[0061] (2) Reasonable process parameters Temperature and speed optimization The temperature of the twin-screw extruder is set at 180-230℃, and the temperature of each section from the feeding port to the die head is reasonably distributed, which can make the raw materials fully melt and mix, and at the same time, the material degradation caused by too high temperature can be avoided. The screw speed is in the range of 300-500r / min, which can ensure the sufficient mixing of the material and avoid the influence on the material performance caused by too high shear force due to too fast speed. These reasonable process parameters ensure the stability and uniformity of the material during the preparation process, which is helpful to obtain the light-resistant and flame-retardant ABS material with excellent performance.

[0062] III. Cost and application (1) Cost reduction Synergistic flame retardation cost reduction By using flame retardant synergists, while still meeting flame retardancy requirements, the content of certain flame retardant ingredients (such as bromotriazine or carrier-free antimony trioxide masterbatch) can be appropriately reduced, thereby lowering material costs. Furthermore, the material's excellent processing properties (such as high fluidity, which reduces processing energy consumption) also help control overall production costs, achieving cost reduction and efficiency gains, and enhancing product market competitiveness.

[0063] (2) Wide application Multi-field applicability This material boasts excellent comprehensive properties, making it suitable not only for the production of electrical enclosures but also for applications in home appliances (such as various small appliance housings) and automotive (interior and exterior decoration). Its excellent flame retardancy, light aging resistance, mechanical properties, and appearance quality meet the performance and appearance requirements of various industries, offering broad application prospects and expanding material selection possibilities for related products.

[0064] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A light-resistant and flame-retardant ABS material for electrical boxes, characterized by: The composition comprises the following raw materials in parts by weight: 40-50 parts of ABS resin; 25-30 parts of AS resin; 7-10 parts of ABS high-glue powder; CPE 2 to 5 copies; 13-17 parts of bromotriazine; 2-4 parts of uncarrier antimony trioxide masterbatch; 3-5 parts of flame retardant synergist; Precipitate 1-2 parts of barium sulfate; 0.2-0.4 parts of titanium dioxide; 0.1-0.4 parts of primary antioxidant; 0.2-0.8 parts of auxiliary antioxidant; 0.1-0.4 parts of lubricant; 0.1-0.4 parts of anti-dripping agent; 0.2-0.6 parts of dispersant; 0.3 to 0.5 parts of ultraviolet absorber.

2. The light-aging-resistant flame-retardant ABS material for electrical boxes according to claim 1, characterized in that: It also includes 1 to 2 parts of precipitated barium sulfate as a filler.

3. The light-resistant and flame-retardant ABS material for electrical boxes according to claim 1, characterized in that: The ABS resin is a high melt index ABS resin.

4. The light-aging-resistant flame-retardant ABS material for electrical boxes according to claim 1, characterized in that: The AS resin is a low molecular weight AS resin.

5. The light-resistant and flame-retardant ABS material for electrical boxes according to claim 1, characterized in that: The flame retardant synergist is a compound that can synergistically improve flame retardancy, including a halogen compound and a phosphorus-nitrogen compound.

6. A method for preparing a light-resistant and flame-retardant ABS material for an electrical box, comprising the light-resistant and flame-retardant ABS material for an electrical box according to any one of claims 1 to 5, characterized in that: The specific steps include: S10: weighing the raw materials in proportion; S20: uniformly mixing ABS resin, AS resin, ABS high-rubber powder, bromotriazine, carrier-free antimony trioxide masterbatch or antimony oxide masterbatch, flame retardant synergist, titanium dioxide, optional ultraviolet absorber and optional precipitated barium sulfate in a high-pressure mixer; S30: feeding the mixed materials into a twin-screw extruder for melt blending and extrusion, while adding a primary antioxidant, a secondary antioxidant, a lubricant and an anti-dripping agent; S40: The extrudate is cooled and pelletized to obtain the light-resistant and flame-retardant ABS material.

7. The method for preparing a light-resistant and flame-retardant ABS material for an electrical box according to claim 6, characterized in that: In step S30, the extruder temperature is set to 180-230° C., and the screw speed is set to 300-500 r / min.

8. The method for preparing a light-resistant and flame-retardant ABS material for an electrical box according to claim 6, characterized in that: In step S30, the temperatures of the sections of the twin-screw extruder from the feed port to the die are: 180-190°C, 190-200°C, 200-210°C, 210-220°C, and 220-230°C.

9. The method for preparing a light-resistant and flame-retardant ABS material for an electrical box according to claim 6, characterized in that: In step S40, cooling is performed by water tank cooling or air cooling, and the cooling temperature is 10-20°C.

10. The method for preparing a light-resistant and flame-retardant ABS material for an electrical box according to claim 6, characterized in that: In step S40 , pelletizing is to feed the cooled solidified material strips into a pelletizer and cut them into particles of uniform size by a rotating blade or cutting device.

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