5VA flame-retardant ABS material for electric control box and preparation method of 5VA flame-retardant ABS material

Abstract

The invention provides a 5VA flame-retardant ABS material for an electric control box and a preparation method thereof.The 5VA flame-retardant ABS material for the electric control box is prepared from, by weight, 60-80 parts of ABS resin, 5-9 parts of flexibilizer, 8-14 parts of brominated flame retardant, 2-5 parts of synergistic flame retardant, 3-18 parts of glass / ceramic functional powder and 0.1-1 part of auxiliaries, the microstructure of the glass / ceramic functional powder is in a crystal-like ball shape, and the glass / ceramic functional powder is in a spherical shape. And the particle size D50 is 12-14 [mu] m. According to the flame-retardant ABS material, the glass / ceramic functional powder is added into the flame-retardant ABS material, so that the use of a brominated flame retardant and a synergistic flame retardant is reduced, the influence of the reduction of the brominated flame retardant and the synergistic flame retardant on the rigidity and the impact strength of an ABS material system can be effectively avoided, and the mechanical property and the cost of the ABS resin material are considered; and when the ABS resin material system disclosed by the invention is used for preparing a thin-wall product with the wall thickness of 1.5-2.0 mm, the flame retardant grade can reach 5VA grade.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, and in particular to a flame-retardant ABS material for an electric control box and a preparation method thereof. Background Art

[0002] With the market demand and product upgrades, lightweight and cost-effectiveness have become essential competitiveness in the home appliance industry. Among them, due to the high flame retardant requirements of electric control boxes, highly flame-retardant 5VA thin-walled electric control box products will become the mainstream in the future. ABS plastic is a material with excellent comprehensive performance. Its extremely high cost-effectiveness has been widely used in various fields of production and life, but the oxygen index of ABS is only 18, which is a flammable material. At present, the market mainly modifies ABS materials by adding bromine antimony flame retardants to make them reach V2, V1, V0, 5VB or 5VA flame retardant levels, and 5VA is the highest flame retardant level at present, and the modification difficulty is relatively high. However, the conventional use of bromine antimony flame retardant system alone cannot achieve stable flame retardant 5VA level products, especially thin-walled products with a wall thickness of 1.5mm to 2.0mm.

[0003] At present, the product materials with a wall thickness of 1.5mm to 2.0mm and a flame retardant grade of 5VA on the market are generally expensive. For example, a low-carbon 5VA flame-retardant ABS material and its preparation method and application disclosed in Chinese invention patent CN117430910 use cellulose filler to achieve 2.0mm flame-retardant 5VA, and the use of synergistic flame retardant antimony trioxide needs to be greatly increased, which is costly; an ABS composition disclosed in Chinese invention patent CN114573942 and its preparation method and application use a large amount of mineral fillers and flame retardants to achieve 1.5mm flame-retardant 5VA, and the ABS content is only 32.5%, which is expensive and has a poor overall appearance; a low-smoke environmentally friendly 5VA flame-retardant ABS material and its preparation method disclosed in Chinese invention patent CN110483941 achieves 1.5mm flame-retardant 5VA by adding a large amount of CPE material, but CPE will reduce the rigidity of the material, and the thermal stability is poor, and HCL that decomposes and corrodes the mold during injection molding will be decomposed. Chinese invention patent CN102863734A discloses a flame retardant ABS composite and its preparation method, which uses melamine isocyanate (MCA) to achieve a flame retardant V0 of 2.0mm, but cannot achieve a flame retardant level of 1.5mm / 5VA. Melamine isocyanate (MCA) is an organic substance with poor heat resistance and easy decomposition. It contains melamine, which is a substance explicitly banned by REACH regulations.

[0004] Therefore, it is urgent to develop a 5VA flame-retardant ABS material for electric control boxes to solve the shortcomings of the existing technology. Summary of the invention

[0005] The object of the present invention is to provide a 5VA flame-retardant ABS material for an electric control box and a preparation method thereof. The ABS material is easy to prepare, takes into account the mechanical properties and cost of the ABS material, and enables the ABS material system of the present invention to achieve a flame retardant grade of 5VA when preparing a thin-walled product with a wall thickness of 1.5 mm to 2.0 mm.

[0006] To achieve the above-mentioned purpose, the present invention provides a 5VA flame-retardant ABS material for an electric control box. The raw materials for the preparation include, by weight, 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 auxiliary agent, wherein the microstructure of the glass / ceramic functional powder is a spheroidal crystal type, and the particle size D50 is 12 μm to 14 μm.

[0007] Compared with the prior art, the flame-retardant ABS material of the present invention contains glass / ceramic functional powder. During the combustion process, the glass / ceramic functional powder reacts with organic free radicals to generate incombustibles. When melted, it absorbs a large amount of heat to reduce the temperature, so as to form a hard insulating dense glass-ceramic stabilizer, which can isolate oxygen and prevent further combustion. The particle size D50 of the glass / ceramic functional powder is 12 μm-14 μm, which is conducive to uniform dispersion in the ABS material system. The microstructure of the glass / ceramic functional powder is a spheroidal crystal type, so as the proportion of the glass / ceramic functional powder increases, the rigidity of the ABS material system is enhanced and the impact strength is reduced. Based on its flame retardant performance, the amount of brominated flame retardant and synergistic flame retardant added can be reduced, thereby effectively avoiding the influence of the reduction of brominated flame retardant and synergistic flame retardant in the system on the rigidity and impact strength of the ABS material system, taking into account the mechanical properties and cost of the ABS resin material, and enabling the ABS resin material system of the present invention to achieve a flame retardant grade of 5VA when preparing thin-walled products with a wall thickness of 1.5 mm-2.0 mm.

[0008] As a preferred technical solution, the preparation raw materials of the present invention include, by weight, 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 auxiliary agent.

[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, acrylic polymer, styrene block copolymer and polyolefin thermoplastic elastomer.

[0012] As a preferred technical solution, the brominated flame retardant of the present invention is at least one selected from brominated triazine, decabromodiphenylethane, 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 silicone microspheres.

[0014] As a preferred technical solution, the auxiliary agent of the present invention includes 0.1 to 0.3 parts of anti-dripping 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 an electric control box, comprising:

[0016] (1) Weighing required weight portions of the ABS resin, the toughening agent, the brominated flame retardant, the synergistic flame retardant, the glass / ceramic functional powder and the auxiliary agent, and mixing them uniformly to obtain a mixture;

[0017] (2) Extruding the mixture in an extruder, cooling with water, and granulating to obtain a 5VA flame-retardant ABS material for an electric control box.

[0018] As a preferred technical solution, the processing temperature of the extruder of the present invention is 180° C. to 210° C., and the rotation speed is 240 r / min to 320 r / min. DETAILED DESCRIPTION

[0019] The flame-retardant ABS material disclosed in the present invention can be applied to electric control box products. When the wall thickness is 1.5 mm to 2 mm, the flame-retardant grade can reach 5VA grade, and it has excellent mechanical properties, thus solving the technical problem that it is difficult for the electric control box in the prior art to achieve both lightweight, mechanical properties and flame-retardant grade.

[0020] The 5VA flame-retardant ABS material for the electric control box of the present invention comprises, by weight, 60 to 80 parts of ABS resin, 5 to 9 parts of toughening agent, 8 to 14 parts of bromine 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 auxiliary agent.

[0021] Furthermore, the thin-wall flame-retardant ABS material for the electric control box of the present invention comprises, by weight, 68 to 72 parts of ABS resin, 6 to 8 parts of toughening agent, 8 to 12 parts of bromine-based 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 auxiliary agent.

[0022] Further, the weight proportion of the ABS resin of the present invention may be, but not limited to, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 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 not limited to, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, and 19%. ABS resin is a terpolymer of three monomers: acrylonitrile, butadiene, and styrene. Various resins with different properties can be made by adjusting the contents of the three monomers. The present invention uses ABS resin with a rubber (i.e., butadiene) content of 10% to 19%, which 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 can be selected from at least one of PA757K of Zhenjiang Chimei and 0215H of Jilin Petrochemical.

[0023] Furthermore, the weight percentage of the toughening agent of the present invention can be, but is not limited to, 5 parts, 6 parts, 7 parts, 8 parts, and 9 parts. The toughening agent is selected from at least one of ABS high-rubber powder, acrylic polymers, styrene block copolymers, and polyolefin elastomers. Preferably, the toughening agent of the present invention is selected from ABS high-rubber powder. The rubber content in 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 fluidity.

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

[0025] Further, the weight percentage of the synergistic flame retardant of the present invention can be, but is 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 silicone 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 proportion of the glass / ceramic functional powder of the present invention may be, but is 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, and 18 parts. The microstructure of the glass / ceramic functional powder of the present invention is a quasi-crystalline sphere, and the particle size D50 is 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, and 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 the preparation process, which makes it have good compatibility in the ABS resin system, and the particle size D50 is 12μm~14μm, making its distribution in the ABS resin more uniform, and its microstructure is spherulite-like. As the proportion increases, the rigidity of the ABS material system will increase and the impact strength will decrease. Due to its flame retardant mechanism, the addition of brominated flame retardants and synergistic flame retardants can be greatly reduced, reducing the impact of the reduction of brominated flame retardants and synergistic flame retardants on ABS rigidity and impact strength, taking into account the mechanical properties of the material, and making its flame retardant grade reach 5VA level.

[0027] Further, the weight percentage of the auxiliary agent of the present invention may be, but is not limited to, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, and 1.0. The auxiliary agent of the present invention includes 0.1 to 0.3 parts of an anti-dripping agent, 0.3 to 0.5 parts of an antioxidant, and 0.1 to 0.2 parts of a lubricant. Specifically, the weight percentage of the anti-dripping agent may be, but is not limited to, 0.1, 0.2, and 0.3 parts, and the anti-dripping agent may be specifically selected from SAN-coated polytetrafluoroethylene. The weight percentage of the antioxidant may be, but is not limited to, 0.3, 0.4, and 0.5 parts. The antioxidant may be selected from one or more of hindered phenol antioxidants and phosphite antioxidants; preferably, the antioxidant is a compound of hindered phenol antioxidants and phosphite antioxidants in a mass ratio of 1:1; the hindered phenol 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)trisphosphite. The weight portion of the lubricant may be, but is not limited to, 0.1 part or 0.2 part. The lubricant is selected from one or more compound lubricants of fatty amides and pentaerythritol stearate. Specifically, the fatty amide may be at least one of oleamide, erucamide and ethylene bisstearamide. Preferably, the lubricant is ethylene bisstearamide.

[0028] The preparation method of the 5VA flame-retardant ABS material for an electric control box of the present invention comprises: (1) weighing required weight portions of ABS resin, toughening agent, bromine-based flame retardant, synergistic flame retardant, glass / ceramic functional powder and auxiliary agent, and mixing them uniformly to obtain a mixture; (2) extruding the mixture in an extruder, water-cooling and granulating to obtain the 5VA flame-retardant ABS material for the electric control box.

[0029] Wherein, the extruder may specifically be a twin-screw extruder. The processing temperature of the extruder is 180°C to 210°C, and the rotation speed is 240r / min to 320r / min. By way of example, the processing temperature of the extruder may be, but is not limited to, 180°C, 185°C, 190°C, 195°C, 200°C, 205°C, 210°C. The rotation speed of the extruder may be, but is not limited to, 240r / min, 250r / min, 260r / min, 270r / min, 280r / min, 290r / min, 300r / min, 310r / min, 320r / min.

[0030] In order to better illustrate the purpose, technical scheme and beneficial effects of the present invention, the present invention will be further described below in conjunction with specific embodiments. It should be noted that the following implementation method is a further explanation of the present invention and should not be used as a limitation of the present invention.

[0031] Among the materials used, ABS resin was selected from PA 757K of Zhenjiang Chimei and 0215H of Jilin Petrochemical; glass / ceramic functional powder was selected from DM95-G700 of Anmi Micro-Nano New Materials (Guangzhou) Co., Ltd. The remaining materials whose sources were not specified can be obtained from conventional commercial channels.

[0032] Example 1

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

[0034] Example 2

[0035] The present embodiment provides a 5VA flame-retardant ABS material for an electric control box. The raw materials for preparation include, by weight, 72.3 parts of ABS resin (PA757K produced by Zhenjiang Chimei), 7 parts of ABS high-glue powder, 10 parts of bromotriazine, 2.5 parts of antimony trioxide, 8 parts of glass / ceramic functional powder, 0.1 parts of SAN-coated polytetrafluoroethylene, 0.4 parts of antioxidant (a compound of antioxidant 1010 and antioxidant 168 mixed in a mass ratio of 1:1), and 0.2 parts of ethylene bisstearamide.

[0036] Example 3

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

[0038] Example 4

[0039] The present embodiment provides a 5VA flame-retardant ABS material for an electric control box. The raw materials for preparation include, by weight, 72.3 parts of ABS resin (PA757K produced by Zhenjiang Chimei), 7 parts of ABS high-glue powder, 8 parts of bromotriazine, 2 parts of antimony trioxide, 12 parts of glass / ceramic functional powder, 0.1 parts of SAN-coated polytetrafluoroethylene, 0.4 parts of antioxidant (a compound of antioxidant 1010 and antioxidant 168 mixed in a mass ratio of 1:1), and 0.2 parts of ethylene bisstearamide.

[0040] Example 5

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

[0042] Example 6

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

[0044] Comparative Example 1

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

[0046] Comparative Example 2

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

[0048] Comparative Example 3

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

[0050] Comparative Example 4

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

[0052] Comparative Example 5

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

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

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

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

[0057] The 5VA flame-retardant ABS materials for the electric control boxes prepared in Examples 1 to 6 and Comparative Examples 1 to 5 were dried respectively, and then injection molded into standard test specimens for performance testing. The process conditions for injection molding were: nozzle temperature of 210°C, temperatures of each zone of 180°C, 190°C, and 210°C, holding time of 3-5s, injection pressure of 45-60MPa, the conditions for the performance test are as follows, and the test results of the standard specimens are shown in Table 1.

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

[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 Determination of IZOD impact strength of plastics";

[0061] Flame retardant test: refer to "UL 94-2018 Flammability Test for Equipment and Appliance Component Materials", the thickness of the sample is 1.5mm and 2.0mm.

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

[0063]

[0064] Please refer to the test results in Table 1 for details. It can be seen from Examples 1 to 4 that the introduction of glass / ceramic functional powder can stably make the flame retardant performance of the ABS material system reach 5VA level, and as the proportion of the powder is added, 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] Comparative Example 1 lacks glass / ceramic functional powder compared to Example 1, and its tensile bending is relatively low, and its flame retardant performance cannot reach the 5VA level of 1.5mm;

[0066] It can be further seen from Comparative Examples 2 to 4 that even if the addition ratio of brominated flame retardants and synergistic flame retardants is increased, the ABS material system cannot reach the 5VA flame retardancy level of 1.5 mm;

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

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention is described in detail with reference to the preferred embodiments, it is not limited to those listed in the embodiments. Those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. The electric control box is made of 5VA flame retardant ABS material, characterized by: The raw materials 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 auxiliary agent in parts by weight, wherein the microstructure of the glass / ceramic functional powder is quasi-crystalline spherical, and the particle size D50 is 12 μm to 14 μm.

2. The 5VA flame-retardant ABS material for the electric control box according to claim 1, characterized in that: In terms of weight, the raw materials 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 auxiliary agent.

3. The 5VA flame retardant ABS material for the electric control box according to claim 1 or 2, characterized in that: The glass / ceramic functional powder is selected from DM95-G700 of Anmi Micro-Nano New Materials (Guangzhou) Co., Ltd.

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

5. The 5VA flame retardant ABS material for the electric control box according to claim 1 or 2, characterized in that: The toughening agent is selected from at least one of ABS high rubber powder, acrylic polymer, styrene block copolymer and polyolefin elastomer.

6. The 5VA flame retardant ABS material for the electric control box according to claim 1 or 2, characterized in that: The brominated flame retardant is selected from at least one of brominated triazine, decabromodiphenylethane, tetrabromobisphenol A and brominated epoxy resin.

7. The 5VA flame retardant ABS material for the electric control box according to claim 1 or 2, characterized in that: The synergistic flame retardant is selected from at least one of antimony trioxide, antimony pentoxide and silicone microspheres.

8. The 5VA flame retardant ABS material for electric control box according to claim 1 or 2, characterized in that: The auxiliary agent comprises 0.1 to 0.3 parts of an anti-dripping agent, 0.3 to 0.5 parts of an antioxidant and 0.1 to 0.2 parts of a lubricant.

9. The method for preparing the 5VA flame-retardant ABS material for an electric control box according to any one of claims 1 to 8, characterized in that: include: (1) Weighing required weight portions of the ABS resin, the toughening agent, the brominated flame retardant, the synergistic flame retardant, the glass / ceramic functional powder and the auxiliary agent, and mixing them uniformly to obtain a mixture; (2) Extruding the mixture in an extruder, cooling with water, and granulating to obtain a 5VA flame-retardant ABS material for an electric control box.

10. The method for preparing 5VA flame-retardant ABS material for electric control box according to claim 9, characterized in that: The processing temperature of the extruder is 180° C. to 210° C., and the rotation speed is 240 r / min to 320 r / min.

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