5VA Flame-Retardant ABS Material for Electrical Control Box and Its Preparation Method

Abstract

This invention provides a 5VA flame-retardant ABS material for electrical control boxes and its preparation method. The raw materials for preparing the 5VA flame-retardant ABS material for electrical control boxes, by weight, include 60-80 parts ABS resin, 5-9 parts toughening agent, 8-14 parts brominated flame retardant, 2-5 parts synergistic flame retardant, 3-18 parts glass / ceramic functional powder, and 0.1-1 parts additives. The glass / ceramic functional powder has a spheroidal microstructure with a particle size D50 of 12μm-14μm. By adding glass / ceramic functional powder to the flame-retardant ABS material, this invention reduces the use of brominated flame retardants and synergistic flame retardants, effectively avoiding the impact of reduced brominated flame retardants and synergistic flame retardants on the rigidity and impact strength of the ABS material system. This balances the mechanical properties and cost of the ABS resin material, and enables the ABS resin material system of this invention to achieve a 5VA flame retardant rating when preparing thin-walled products with a wall thickness of 1.5mm-2.0mm.

Description

Technical Field

[0001] This invention relates to the field of polymer materials technology, and in particular to a flame-retardant ABS material for electrical control boxes and its preparation method. Background Technology

[0002] With market demand and product upgrades, lightweighting and cost-effectiveness have become essential competitive advantages in the home appliance industry. Among these, electrical control boxes, due to their high flame-retardant requirements, will likely see high flame-retardant 5VA thin-walled electrical control boxes become the mainstream in the future. ABS plastic is a material with excellent comprehensive performance, and its high cost-effectiveness has led to its widespread application in various fields of production and daily life. However, ABS has an oxygen index of only 18, making it a flammable material. Currently, the market mainly modifies ABS materials by adding bromine-antimony flame retardants to achieve flame-retardant levels of V2, V1, V0, 5VB, or 5VA. 5VA is currently the highest flame-retardant level, and its modification is relatively difficult. However, conventional use of bromine-antimony flame-retardant systems alone cannot achieve stable flame-retardant 5VA level products, especially for thin-walled products with a wall thickness of 1.5mm to 2.0mm.

[0003] Currently, materials with a wall thickness of 1.5mm to 2.0mm that achieve a 5VA flame retardant rating are generally expensive. For example, Chinese invention patent CN117430910 discloses a low-carbon 5VA flame retardant ABS material, its preparation method, and its application, which uses cellulose filler to achieve a 2.0mm flame retardant 5VA rating and requires a significant increase in the use of antimony trioxide as a synergistic flame retardant, resulting in high costs. Chinese invention patent CN114573942 discloses an ABS composition, its preparation method, and its application, which uses a large amount of mineral filler and flame retardant to achieve a 1.5mm flame retardant 5VA rating, but the ABS content is only 32.5%, making it expensive and resulting in a poor overall appearance. Chinese invention patent CN110483941 discloses a low-smoke, environmentally friendly 5VA flame retardant ABS material and its preparation method, which achieves a 1.5mm flame retardant 5VA rating by adding a large amount of CPE material. However, CPE reduces the rigidity of the material and has poor thermal stability, and it decomposes and corrodes the HCl in the mold during injection molding. Chinese invention patent CN102863734A discloses a flame-retardant ABS composite and its preparation method. It uses melamine isocyanate (MCA) as a synergist to achieve a flame retardant V0 of 2.0mm, but it cannot achieve a flame retardant level of 1.5mm / 5VA. Furthermore, melamine isocyanate (MCA) is an organic compound with poor heat resistance and easy decomposition. It contains melamine, which is a substance explicitly prohibited by REACH regulations.

[0004] Therefore, there is an urgent need to develop a 5VA flame-retardant ABS material for electrical control boxes to address the shortcomings of existing technologies. Summary of the Invention

[0005] The purpose of this invention is to provide a 5VA flame-retardant ABS material for electrical control boxes and its preparation method. This ABS material is simple to prepare, takes into account the mechanical properties and cost of ABS material, and enables the ABS material system of this invention to achieve a flame retardant rating of 5VA when preparing thin-walled products with a wall thickness of 1.5mm to 2.0mm.

[0006] To achieve the above objectives, the present invention provides a 5VA flame-retardant ABS material for an electrical control box. The raw materials for preparation, by weight, include 60 to 80 parts of ABS resin, 5 to 9 parts of toughening agent, 8 to 14 parts of brominated flame retardant, 2 to 5 parts of synergistic flame retardant, 3 to 18 parts of glass / ceramic functional powder, and 0.1 to 1 part of additives. The glass / ceramic functional powder has a spheroidal microstructure and a particle size D50 of 12 μm to 14 μm.

[0007] Compared with existing technologies, the flame-retardant ABS material of the present invention contains glass / ceramic functional powder. During combustion, the glass / ceramic functional powder reacts with organic free radicals to generate non-combustible substances. When melting, it absorbs a large amount of heat, lowering the temperature to form a hard, insulating, and dense glass / ceramic stabilizer that can isolate oxygen and prevent further combustion. The particle size D50 of the glass / ceramic functional powder is 12μm to 14μm, which is beneficial for uniform dispersion in the ABS material system. The microstructure of the glass / ceramic functional powder is spherulitic, so as its proportion increases, the rigidity of the ABS material system will increase, while the impact strength will decrease. Based on its flame-retardant properties, the amount of brominated flame retardants and synergistic flame retardants added can be reduced, thereby effectively avoiding the impact of the reduction of brominated flame retardants and synergistic flame retardants on the rigidity and impact strength of the ABS material system. This balances the mechanical properties and cost of ABS resin material, and enables the ABS resin material system of the present invention to achieve a flame retardant rating of 5VA when preparing thin-walled products with a wall thickness of 1.5mm to 2.0mm.

[0008] As a preferred technical solution, the raw materials for preparation of the present invention, by weight, include 68 to 72 parts of ABS resin, 6 to 8 parts of toughening agent, 8 to 12 parts of brominated flame retardant, 2 to 3 parts of synergistic flame retardant, 6 to 12 parts of glass / ceramic functional powder, and 0.1 to 1 part of additives.

[0009] As a preferred technical solution, the glass / ceramic functional powder of the present invention is selected from DM95-G700 of Anmi Micro-Nano New Materials (Guangzhou) Co., Ltd.

[0010] As a preferred technical solution, the rubber content in the ABS resin of the present invention is 10% to 19%.

[0011] As a preferred technical solution, the toughening agent of the present invention is selected from at least one of ABS high-rubber powder, acrylate polymers, styrene block copolymers and polyolefin thermoplastic elastomers.

[0012] As a preferred technical solution, the brominated flame retardant of the present invention is selected from at least one of bromotriazine, decabromodiphenyl ethane, tetrabromobisphenol A and brominated epoxy resin.

[0013] As a preferred technical solution, the synergistic flame retardant of the present invention is selected from at least one of antimony trioxide, antimony pentoxide and organosilicon microspheres.

[0014] As a preferred technical solution, the additives of the present invention include 0.1 to 0.3 parts of anti-drip agent, 0.3 to 0.5 parts of antioxidant and 0.1 to 0.2 parts of lubricant.

[0015] Another aspect of the present invention provides a method for preparing the aforementioned 5VA flame-retardant ABS material for electrical control boxes, comprising:

[0016] (1) Weigh the required weight parts of the ABS resin, the toughening agent, the brominated flame retardant, the synergistic flame retardant, the glass / ceramic functional powder and the additives, and mix them evenly to obtain a mixture;

[0017] (2) The mixture is extruded in an extruder, and after water cooling and granulation, 5VA flame-retardant ABS material for electrical control box is obtained.

[0018] As a preferred technical solution, the processing temperature of the extruder of the present invention is 180℃~210℃, and the rotation speed is 240r / min~320r / min. Detailed Implementation

[0019] The flame-retardant ABS material disclosed in this invention can be used in electrical control box products. When its wall thickness is 1.5mm to 2mm, it can achieve a flame-retardant rating of 5VA and has excellent mechanical properties. It solves the technical problem in the prior art that electrical control boxes are difficult to balance lightweight, mechanical properties and flame-retardant rating.

[0020] The electrical control box of the present invention uses 5VA flame-retardant ABS material, which, by weight, comprises 60 to 80 parts of ABS resin, 5 to 9 parts of toughening agent, 8 to 14 parts of brominated flame retardant, 2 to 5 parts of synergistic flame retardant, 3 to 18 parts of glass / ceramic functional powder, and 0.1 to 1 part of additives.

[0021] Furthermore, the thin-walled flame-retardant ABS material for the electrical control box of the present invention, by weight, comprises 68 to 72 parts of ABS resin, 6 to 8 parts of toughening agent, 8 to 12 parts of brominated flame retardant, 2 to 3 parts of synergistic flame retardant, 6 to 12 parts of glass / ceramic functional powder, and 0.1 to 1 part of additives.

[0022] Further, the weight parts of the ABS resin of the present invention may be, but are not limited to, 60 parts, 62 parts, 64 parts, 66 parts, 68 parts, 70 parts, 72 parts, 74 parts, 76 parts, 78 parts, and 80 parts. The rubber content in the ABS resin is 10% to 19%. As an example, the rubber content in the ABS resin of the present invention may be, but is not limited to, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, and 19%. ABS resin is a terpolymer of acrylonitrile, butadiene, and styrene. By adjusting the content of the three monomers, resins with different properties can be prepared. By using ABS resin with a rubber (i.e., butadiene) content of 10% to 19%, the present invention can improve the compatibility with glass / ceramic functional powder with a particle size D50 of 12μm to 14μm, thereby ensuring its flame retardant effect and the mechanical properties of the ABS material system. Specifically, the ABS resin of the present invention may be selected from at least one of Zhenjiang Chimei's PA757K and Jilin Petrochemical's 0215H.

[0023] Further, the toughening agent of the present invention may be, but is not limited to, 5 parts, 6 parts, 7 parts, 8 parts, or 9 parts by weight. The toughening agent is selected from at least one of ABS high-rubber powder, acrylate polymers, styrene-based block copolymers, and polyolefin elastomers. Preferably, the toughening agent of the present invention is selected from ABS high-rubber powder. The rubber content in the ABS high-rubber powder is 55% to 70%. In addition to enhancing the toughness of the ABS material system, the addition of ABS high-rubber powder also has the effects of enhancing impact strength and optimizing flowability.

[0024] Further, the weight parts of the brominated flame retardant of the present invention may be, but are not limited to, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, or 14 parts. The brominated flame retardant may be selected from at least one of bromotriazine, decabromodiphenyl ethane, tetrabromobisphenol A, and brominated epoxy resin. Preferably, the brominated flame retardant of the present invention may be selected from at least one of bromotriazine and tetrabromobisphenol A.

[0025] Furthermore, the weight parts of the synergistic flame retardant of the present invention may be, but are not limited to, 2 parts, 3 parts, 4 parts, or 5 parts. The synergistic flame retardant is selected from at least one of antimony trioxide, antimony pentoxide, and organosilicon microspheres. Preferably, the synergistic flame retardant of the present invention is selected from at least one of antimony trioxide and antimony pentoxide.

[0026] Further, the weight parts of the glass / ceramic functional powder of the present invention may be, but are not limited to, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 12 parts, 14 parts, 15 parts, 16 parts, or 18 parts. The microstructure of the glass / ceramic functional powder of the present invention is spheroidal, with a particle size D50 of 12 μm to 14 μm. As an example, the particle size D50 of the glass / ceramic functional powder may be, but is not limited to, 12 μm, 13 μm, or 14 μm. The glass / ceramic functional powder of the present invention is selected from DM95-G700 of Anmi Micro-Nano New Materials (Guangzhou) Co., Ltd. DM95-G700 glass / ceramic functional powder undergoes multiple surface treatments during preparation, resulting in good compatibility with ABS resin systems. Its particle size (D50) of 12μm–14μm ensures more uniform distribution within the ABS resin. Furthermore, its spherulitic microstructure, with its increased proportion, enhances the rigidity and reduces the impact strength of the ABS material system. Due to its flame-retardant mechanism, it significantly reduces the need for brominated flame retardants and synergistic flame retardants, mitigating their impact on the rigidity and impact strength of ABS. This balances the material's mechanical properties and achieves a flame retardant rating of 5VA.

[0027] Further, the weight parts of the additives of the present invention may be, but are not limited to, 0.1 parts, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, or 1.0 parts. The additives of the present invention include 0.1 to 0.3 parts of anti-drip agent, 0.3 to 0.5 parts of antioxidant, and 0.1 to 0.2 parts of lubricant. Specifically, the weight parts of the anti-drip agent may be, but are not limited to, 0.1 parts, 0.2 parts, or 0.3 parts, and the anti-drip agent may specifically be selected from SAN-coated polytetrafluoroethylene. The weight parts of the antioxidant may be, but are not limited to, 0.3 parts, 0.4 parts, or 0.5 parts. The antioxidant can be selected from one or more of hindered phenolic antioxidants and phosphite antioxidants in a compound; preferably, the antioxidant is a compound of hindered phenolic antioxidants and phosphite antioxidants in a mass ratio of 1:1; the hindered phenolic antioxidant is preferably antioxidant 1010, i.e., pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]; the phosphite antioxidant is preferably antioxidant 168, i.e., (2,4-di-tert-butylphenyl) phosphite triester. The weight parts of the lubricant can be, but are not limited to, 0.1 parts or 0.2 parts. The lubricant is selected from one or more compound lubricants of fatty amides and pentaerythritol stearate. Specifically, the fatty amides can be at least one of oleamide, erucamide, and ethylene bis-stearamide. Preferably, the lubricant is ethylene bis-stearamide.

[0028] The preparation method of the 5VA flame-retardant ABS material for the electrical control box of the present invention includes: (1) weighing the required weight parts of ABS resin, toughening agent, bromine flame retardant, synergistic flame retardant, glass / ceramic functional powder and additives, and mixing them evenly to obtain a mixture; (2) extruding the mixture in an extruder, and then cooling it with water and granulating it to obtain the 5VA flame-retardant ABS material for the electrical control box.

[0029] Specifically, the extruder can be a twin-screw extruder. The processing temperature of the extruder is 180℃~210℃, and the rotational speed is 240r / min~320r / min. For example, the processing temperature of the extruder can be, but is not limited to, 180℃, 185℃, 190℃, 195℃, 200℃, 205℃, and 210℃. The rotational speed of the extruder can be, but is not limited to, 240r / min, 250r / min, 260r / min, 270r / min, 280r / min, 290r / min, 300r / min, 310r / min, and 320r / min.

[0030] To better illustrate the purpose, technical solution, and beneficial effects of this invention, the invention will be further described below with reference to specific embodiments. It should be noted that the methods described below are further explanations of this invention and should not be construed as limiting it.

[0031] Of the materials used, the ABS resin selected was PA 757K from Zhenjiang Chimei and 0215H from Jilin Petrochemical; the glass / ceramic functional powder was selected from DM95-G700 from Anmi Micro-Nano New Materials (Guangzhou) Co., Ltd. All other materials not specified in their source were obtained through conventional commercial channels.

[0032] Example 1

[0033] This embodiment provides a 5VA flame-retardant ABS material for an electrical control box. By weight, the raw materials include 72.3 parts ABS resin (PA 757K from Zhenjiang Chimei), 7 parts ABS high-adhesion powder, 11.5 parts bromotriazine, 2.5 parts antimony trioxide, 6 parts glass / ceramic functional powder, 0.1 parts SAN-coated polytetrafluoroethylene, 0.4 parts antioxidant (a compound of antioxidant 1010 and antioxidant 168 mixed in a 1:1 mass ratio), and 0.2 parts ethylene bis-stearamide.

[0034] Example 2

[0035] This embodiment provides a 5VA flame-retardant ABS material for an electrical control box. By weight, the raw materials include 72.3 parts ABS resin (PA757K from Zhenjiang Chimei), 7 parts ABS high-adhesion powder, 10 parts bromotriazine, 2.5 parts antimony trioxide, 8 parts glass / ceramic functional powder, 0.1 parts SAN-coated polytetrafluoroethylene, 0.4 parts antioxidant (a compound of antioxidant 1010 and antioxidant 168 mixed in a 1:1 mass ratio), and 0.2 parts ethylene bis-stearamide.

[0036] Example 3

[0037] This embodiment provides a 5VA flame-retardant ABS material for an electrical control box. By weight, the raw materials include 72.3 parts ABS resin (PA 757K from Zhenjiang Chimei), 7 parts ABS high-adhesion powder, 9 parts bromotriazine, 2 parts antimony trioxide, 10 parts glass / ceramic functional powder, 0.1 parts SAN-coated polytetrafluoroethylene, 0.4 parts antioxidant (a compound of antioxidant 1010 and antioxidant 168 mixed in a 1:1 mass ratio), and 0.2 parts ethylene bis-stearamide.

[0038] Example 4

[0039] This embodiment provides a 5VA flame-retardant ABS material for an electrical control box. By weight, the raw materials include 72.3 parts ABS resin (PA757K from Zhenjiang Chimei), 7 parts ABS high-adhesion powder, 8 parts bromotriazine, 2 parts antimony trioxide, 12 parts glass / ceramic functional powder, 0.1 parts SAN-coated polytetrafluoroethylene, 0.4 parts antioxidant (a compound of antioxidant 1010 and antioxidant 168 mixed in a mass ratio of 1:1), and 0.2 parts ethylene bis-stearamide.

[0040] Example 5

[0041] This embodiment provides a 5VA flame-retardant ABS material for an electrical control box. By weight, the raw materials include 71.9 parts ABS resin (PA757K from Zhenjiang Chimei), 8 parts ABS high-adhesion powder, 13 parts tetrabromobisphenol A, 2.5 parts antimony trioxide, 4 parts glass / ceramic functional powder, 0.2 parts SAN-coated polytetrafluoroethylene, 0.3 parts antioxidant (a compound of antioxidant 1010 and antioxidant 168 mixed in a mass ratio of 1:1), and 0.1 parts ethylene bis-stearamide.

[0042] Example 6

[0043] This embodiment provides a 5VA flame-retardant ABS material for an electrical control box. By weight, the raw materials include 65.3 parts ABS resin (Jilin Petrochemical's 0215H), 9 parts ABS high-adhesion powder, 8 parts decabromodiphenyl ethane, 2 parts antimony pentoxide, 15 parts glass / ceramic functional powder, 0.1 parts SAN-coated polytetrafluoroethylene, 0.4 parts antioxidant (a compound of antioxidant 1010 and antioxidant 168 mixed in a 1:1 mass ratio), and 0.2 parts pentaerythritol stearate.

[0044] Comparative Example 1

[0045] This comparative example provides a 5VA flame-retardant ABS material for an electrical control box. By weight, the raw materials include 72.3 parts ABS resin (PA 757K from Zhenjiang Chimei), 7 parts ABS high-adhesion powder, 11.5 parts bromotriazine, 2.5 parts antimony trioxide, 0.1 parts SAN-coated polytetrafluoroethylene, 0.4 parts antioxidant (a compound of antioxidant 1010 and antioxidant 168 mixed in a 1:1 mass ratio), and 0.2 parts ethylene bis-stearamide.

[0046] Comparative Example 2

[0047] This comparative example provides a 5VA flame-retardant ABS material for an electrical control box. By weight, the raw materials include 72.3 parts ABS resin (PA757K from Zhenjiang Chimei), 7 parts ABS high-adhesion powder, 14 parts bromotriazine, 6 parts antimony trioxide, 0.1 parts SAN-coated polytetrafluoroethylene, 0.4 parts antioxidant (a compound of antioxidant 1010 and antioxidant 168 mixed in a 1:1 mass ratio), and 0.2 parts ethylene bis-stearamide.

[0048] Comparative Example 3

[0049] This comparative example provides a 5VA flame-retardant ABS material for an electrical control box. By weight, the raw materials include 72.3 parts ABS resin (PA757K from Zhenjiang Chimei), 7 parts ABS high-adhesion powder, 16 parts bromotriazine, 6 parts antimony trioxide, 0.1 parts SAN-coated polytetrafluoroethylene, 0.4 parts antioxidant (a compound of antioxidant 1010 and antioxidant 168 mixed in a 1:1 mass ratio), and 0.2 parts ethylene bis-stearamide.

[0050] Comparative Example 4

[0051] This comparative example provides a 5VA flame-retardant ABS material for an electrical control box. By weight, the raw materials include 72.3 parts ABS resin (PA757K from Zhenjiang Chimei), 7 parts ABS high-adhesion powder, 18 parts bromotriazine, 6 parts antimony trioxide, 0.1 parts SAN-coated polytetrafluoroethylene, 0.4 parts antioxidant (a compound of antioxidant 1010 and antioxidant 168 mixed in a 1:1 mass ratio), and 0.2 parts ethylene bis-stearamide.

[0052] Comparative Example 5

[0053] This comparative example provides a 5VA flame-retardant ABS material for an electrical control box. By weight, the raw materials include 72.3 parts ABS resin (PA 757K from Zhenjiang Chimei), 7 parts ABS high-adhesion powder, 11.5 parts bromotriazine, 2.5 parts antimony trioxide, 6 parts ordinary glass powder (particle size of 1μm to 13μm, with a disordered amorphous network structure), 0.1 parts SAN-coated polytetrafluoroethylene, 0.4 parts antioxidant (a compound of antioxidant 1010 and antioxidant 168 mixed in a mass ratio of 1:1), and 0.2 parts ethylene bis-stearamide.

[0054] The preparation method of the 5VA flame-retardant ABS material for the electrical control box in Examples 1-6 and Comparative Examples 1-5 may include:

[0055] (1) Weigh the required weight parts of ABS resin, toughening agent, brominated flame retardant, synergistic flame retardant, glass / ceramic functional powder and additives, and mix them in a mixer at 450 r / min for 4 min to obtain a mixture;

[0056] (2) The mixture is placed in a twin-screw extruder for extrusion, cooling, granulation and drying to obtain ABS composite material. The processing temperature of the twin-screw extruder is 180℃~210℃ and the rotation speed is 240r / min~320r / min.

[0057] The electrical control boxes prepared in Examples 1-6 and Comparative Examples 1-5 were dried using 5VA flame-retardant ABS material and then injection molded into standard test specimens for performance testing. The injection molding process conditions were: nozzle temperature 210℃, zone temperatures 180℃, 190℃, and 210℃, holding time 3-5 seconds, and injection pressure 45-60 MPa. The performance testing conditions are shown below, and the test results of the standard specimens are shown in Table 1.

[0058] Tensile strength: obtained according to GB / T1040 test;

[0059] Flexural strength and flexural modulus: Refer to ISO 178-2010 Determination of flexural properties of plastics;

[0060] Notched impact strength: Refer to ISO 180-2000 Plastics - Determination of IZOD impact strength;

[0061] Flame retardancy test: Refer to UL 94-2018 Test for flammability of materials for equipment and appliance components, with sample thicknesses of 1.5 mm and 2.0 mm.

[0062] Table 1 Performance test results of Examples 1-6 and Comparative Examples 1-5

[0063]

[0064] Please refer to the test results in Table 1 for details. As can be seen from Examples 1 to 4, the introduction of glass / ceramic functional powder can make the flame retardant performance of the ABS material system stably reach 5VA level. With the addition of its proportion, even when the amount of bromine antimony flame retardant added is reduced, the rigidity of the material is effectively improved and the impact strength is reduced.

[0065] Compared to Example 1, Comparative Example 1 lacks glass / ceramic functional powder, resulting in relatively lower tensile and bending strength, and its flame retardant performance cannot reach the 5VA level of 1.5mm.

[0066] Further, as shown in Comparative Examples 2-4, even increasing the proportion of brominated flame retardants and synergistic flame retardants cannot enable the ABS material system to achieve a 5VA flame retardant rating of 1.5mm.

[0067] Finally, comparing Example 1 and Comparative Example 5, it can be seen that ordinary glass powder, due to its uneven particle size and lack of multiple surface treatments, has relatively poor compatibility with the resin and flame retardant system. During combustion, it cannot form a hard, insulating, dense glass-ceramic stable material, and its overall physical properties are inferior to glass / ceramic functional powder and cannot achieve the 1.5mm flame retardant 5VA level.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, it is not limited to those listed in the embodiments. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. The electrical control box is made of 5VA flame-retardant ABS material, characterized in that, The raw materials for preparation, by weight, include 68 to 80 parts of ABS resin, 6 to 8 parts of toughening agent, 8 to 9 parts of brominated flame retardant, 2 to 2.5 parts of synergistic flame retardant, 6 to 12 parts of glass / ceramic functional powder, and 0.1 to 1 part of additives. The glass / ceramic functional powder has a microstructure of spheroidal crystals and a particle size D50 of 12 μm to 14 μm. The glass / ceramic functional powder is selected from DM95-G700 of Anmi Micro-Nano New Materials (Guangzhou) Co., Ltd.

2. The 5VA flame-retardant ABS material for the electrical control box according to claim 1, characterized in that, The rubber content in the ABS resin is 10% to 19%.

3. The 5VA flame-retardant ABS material for the electrical control box according to claim 1, characterized in that, The toughening agent is selected from at least one of ABS high-rubber powder, acrylate polymers, styrene block copolymers, and polyolefin elastomers.

4. The 5VA flame-retardant ABS material for the electrical control box according to claim 1, characterized in that, The brominated flame retardant is selected from at least one of bromotriazine, decabromodiphenyl ethane, tetrabromobisphenol A, and brominated epoxy resin.

5. The 5VA flame-retardant ABS material for the electrical control box according to claim 1, characterized in that, The synergistic flame retardant is selected from at least one of antimony trioxide, antimony pentoxide, and organosilicon microspheres.

6. The 5VA flame-retardant ABS material for the electrical control box according to claim 1, characterized in that, The additives include 0.1 to 0.3 parts of anti-drip agent, 0.3 to 0.5 parts of antioxidant, and 0.1 to 0.2 parts of lubricant.

7. The method for preparing 5VA flame-retardant ABS material for electrical control boxes according to any one of claims 1 to 6, characterized in that, include: (1) Weigh the required weight parts of the ABS resin, the toughening agent, the brominated flame retardant, the synergistic flame retardant, the glass / ceramic functional powder and the additives, and mix them evenly to obtain a mixture; (2) The mixture is extruded in an extruder, and after water cooling and granulation, 5VA flame-retardant ABS material for electrical control box is obtained.

8. The method for preparing 5VA flame-retardant ABS material for electrical control boxes according to claim 7, characterized in that, The extruder has a processing temperature of 180℃~210℃ and a rotation speed of 240r / min~320r / min.

Images