Dustproof styrene-based composition, and preparation method and application thereof

Abstract

The application discloses a dustproof styrene-based composition and a preparation method and application thereof. The dustproof styrene-based composition comprises the following components in parts by weight: 40-80 parts of styrene-acrylonitrile copolymer A; 5-20 parts of styrene-acrylonitrile copolymer B; 20-40 parts of a reinforcing agent; and 0.1-10 parts of a compatilizer. The weight average molecular weight of the styrene-acrylonitrile copolymer A is 100000-120000, and the acrylonitrile content is not less than 26 wt%. The weight average molecular weight of the styrene-acrylonitrile copolymer B is 500000-600000, and the acrylonitrile content is not less than 26 wt%. The reinforcing agent contains carbon fibers, and the content of the carbon fibers is not less than 50 wt%. The application can effectively limit the orientation of the reinforcing agent, make the reinforcing agent better distributed in the system, and improve the dynamic dustproof effect of the composition by compounding two specific molecular weight styrene-acrylonitrile copolymers, and the application is especially suitable for the application in materials such as air conditioner fan blades.

Description

Technical Field

[0001] This invention belongs to the field of polymer material modification technology, and more specifically, relates to a dustproof styrene-based composition, its preparation method and application. Background Technology

[0002] Styrene-acrylonitrile copolymer (styrene-based) is a thermoplastic polymer material with high strength, excellent transparency, and easy processing and molding. It is widely used in home appliances, office supplies, daily necessities and other fields.

[0003] Adding glass fiber to styrene can significantly improve the strength and rigidity of the material and reduce the linear coefficient of thermal expansion, resulting in excellent dimensional stability. This makes it suitable for components with higher requirements for strength and dimensional stability, such as air conditioner fan blades. However, during use, the glass fiber may be exposed on the surface of the resin matrix, resulting in a rougher surface of the fan blade material. Over long-term operation, dust can easily accumulate, leading to reduced air delivery efficiency and increased susceptibility to bacterial growth.

[0004] In existing technologies, replacing some glass fibers with carbon fibers can improve the surface resistivity of materials and improve static dust prevention to a certain extent. However, its effect on dynamic dust prevention is limited. For air conditioner fan blades, which are in a state of long-term operation, a large amount of dust will still accumulate on the surface of the fan blades after a period of operation. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects or shortcomings of existing dustproof styrene-based compositions, which have poor dynamic dustproof effect, and to provide a dustproof styrene-based composition.

[0006] Another object of the present invention is to provide a method for preparing the dustproof styrene-based composition.

[0007] Another object of the present invention is to provide the application of the aforementioned dustproof styrene-based composition.

[0008] To achieve the above objectives, the present invention employs the following technical solution:

[0009] A dustproof styrene-based composition comprising the following components in parts by weight:

[0010]

[0011] Wherein, the weight-average molecular weight of the styrene-acrylonitrile copolymer A is 100,000 to 120,000, and the acrylonitrile content is not less than 26 wt%.

[0012] The weight-average molecular weight of the styrene-acrylonitrile copolymer B is 500,000 to 600,000, and the acrylonitrile content is not less than 26 wt%.

[0013] The reinforcing agent contains carbon fiber, wherein the carbon fiber content is not less than 50 wt%.

[0014] In this invention, by compounding styrene-acrylonitrile copolymers with different weight-average molecular weights, and adjusting the acrylonitrile content to be no less than 26 wt%, and by synergizing a certain amount of carbon fiber, the dynamic dustproof effect of the composition can be effectively improved. Specifically: low molecular weight styrene-acrylonitrile copolymers have excellent processing performance, but their viscosity is low. During the injection molding of fan blades, the orientation and distribution of the reinforcing agent are relatively random, which easily leads to exposure, thus greatly reducing the dynamic dustproof effect of the fan blades. By compounding a certain amount of high molecular weight styrene-acrylonitrile copolymer, the orientation of the reinforcing agent can be restricted, allowing it to be better distributed in the system, thereby greatly reducing exposure and giving the fan blade material a smoother surface. Further addition of carbon fiber with excellent conductivity greatly reduces the surface resistivity of the fan blade material while also significantly improving its mechanical properties. The three factors work synergistically to greatly improve the dynamic dustproof effect of fan blades made using this material.

[0015] It should be noted that, in the dustproof styrene-based composition of the present invention, the content of styrene-acrylonitrile copolymer A is preferably not less than 30 wt%.

[0016] It should be noted that the weight-average molecular weight of the styrene-acrylonitrile copolymer described in this invention was determined by gel permeation chromatography (GPC) using a TDA 302 GPC analyzer manufactured by Viscotek, USA. Polystyrene was used as the standard, tetrahydrofuran was used as the eluent, the flow rate was 1.0 mL / min, and the test temperature was 30 °C.

[0017] In this invention, the weight-average molecular weight of the styrene-acrylonitrile copolymer A is 100,000 to 120,000, for example, but not limited to, 100,000, 101,000, 102,000, 103,000, 104,000, 105,000, 106,000, 107,000, 108,000, 109,000, 110,000, 111,000, 112,000, 113,000, 114,000, 115,000, 116,000, 117,000, 118,000, 119,000, or 120,000, all of which can achieve the present invention. Further, the weight-average molecular weight of the styrene-acrylonitrile copolymer A is 105,000 to 115,000.

[0018] The acrylonitrile content in the styrene-acrylonitrile copolymer A is not less than 26 wt%, for example, but not limited to, not less than 26 wt%, 26.5 wt%, 27 wt%, 27.5 wt%, 28 wt%, 28.5 wt%, 29 wt%, 29.5 wt%, 30 wt%, 30.5 wt%, 31 wt%, 31.5 wt%, 32 wt%, 32.5 wt%, 33 wt%, 33.5 wt%, 34 wt%, 34.5 wt%, or 35 wt%, etc., all of which can achieve the present invention. Further, the acrylonitrile content in the styrene-acrylonitrile copolymer A is 27–33 wt%.

[0019] The styrene-acrylonitrile copolymer B has a weight-average molecular weight of 500,000 to 600,000, such as, but not limited to, 500,000, 505,000, 510,000, 515,000, 520,000, 525,000, 530,000, 535,000, 540,000, 545,000, 550,000, 555,000, 560,000, 565,000, 570,000, 575,000, 580,000, 585,000, 590,000, 595,000, or 600,000, all of which can achieve the present invention. Further, the styrene-acrylonitrile copolymer B has a weight-average molecular weight of 520,000 to 570,000. The acrylonitrile content in the styrene-acrylonitrile copolymer B is not less than 26 wt%, for example, but not limited to, not less than 26 wt%, 26.5 wt%, 27 wt%, 27.5 wt%, 28 wt%, 28.5 wt%, 29 wt%, 29.5 wt%, 30 wt%, 30.5 wt%, 31 wt%, 31.5 wt%, 32 wt%, 32.5 wt%, 33 wt%, 33.5 wt%, 34 wt%, 34.5 wt%, or 35 wt%, etc., all of which can achieve the present invention. Further, the acrylonitrile content in the styrene-acrylonitrile copolymer B is 27–33 wt%.

[0020] Specifically, the acrylonitrile content is characterized by infrared spectroscopy combined with hydrogen nuclear magnetic resonance (NMR) and carbon nuclear magnetic resonance (NMR).

[0021] In this invention, the carbon fiber content in the reinforcing agent is not less than 50 wt%, for example, but not limited to, not less than 50 wt%, 55 wt%, 60 wt%, 65 wt%, 70 wt%, 75 wt%, or 80 wt%, etc., all of which can achieve this invention.

[0022] Furthermore, the carbon fiber content in the reinforcing agent is 50wt% to 70wt%.

[0023] Furthermore, the reinforcing agent also includes one or more of glass fibers, talc, wollastonite, whiskers, or glass microspheres. Specifically, the appropriate reinforcing agent can be selected based on the mechanical properties required for the actual application, all of which can achieve a dynamic dustproof effect.

[0024] Furthermore, the reinforcing agent is a mixture of glass fiber and carbon fiber.

[0025] Specifically, the glass fiber has an average diameter of 6–20 μm.

[0026] The average diameter of the carbon fiber is 13–18 μm.

[0027] Specifically, the average diameter is tested according to GB / T 7690.5-2013 Method A.

[0028] It should be noted that the styrene-acrylonitrile copolymer described in this invention can be commercially available or self-made.

[0029] Specifically, the preparation method of the styrene-acrylonitrile copolymer includes, but is not limited to, the following preparation methods:

[0030] It is obtained by polymerization of acrylonitrile monomer and styrene monomer.

[0031] Specifically, the polymerization temperature is 150–160°C, and the polymerization time is 1–4 hours.

[0032] Specifically, in order to control the weight-average molecular weight of styrene-acrylonitrile copolymers, a molecular weight regulator is added at an appropriate polymerization time to stop the reaction and obtain styrene-acrylonitrile copolymers with different molecular weights.

[0033] Specifically, the amount of the molecular weight regulator added is 0.1 to 0.2 wt% of the total monomer.

[0034] Specifically, the acrylonitrile content in the styrene-acrylonitrile copolymer is controlled by the feeding ratio of styrene monomer to acrylonitrile monomer; the mass ratio of acrylonitrile monomer to styrene monomer is 26:74 to 35:65.

[0035] Furthermore, the dustproof styrene-based composition also includes 1.5 to 5 parts of lubricant, wherein the lubricant is an amide-based lubricant.

[0036] Specifically, the amide lubricant includes one or more of erucamide, oleamide, or N,N'-ethylene bis-stearamide.

[0037] Further, the dustproof styrene-based composition comprises the following components in parts by weight:

[0038]

[0039] Furthermore, the compatibilizer includes maleic anhydride polymers and / or acrylate polymers.

[0040] Specifically, the maleic anhydride polymer can be one or more of ABS-g-MAH, AS-g-MAH, or styrene-maleic anhydride copolymer.

[0041] Specifically, the acrylate polymer can be one or more of ABS-g-GMA, methyl methacrylate, and styrene-acrylonitrile-glycidyl methacrylate copolymer.

[0042] Furthermore, the dustproof styrene-based composition also includes 0.1 to 5 parts of additives.

[0043] Specifically, the additives include one or more of antioxidants, weathering agents, or colorants.

[0044] In this invention, commonly used antioxidants can be selected according to existing technology, such as, but not limited to, hindered phenolic antioxidants and / or phosphite antioxidants.

[0045] Specifically, the hindered phenolic antioxidant is one or more of N,N'-hexamethylene bis(3,5-di-tert-butyl-4-hydroxyphenylpropionamide) (Irganox 1098), pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] (Irganox 1010), 1,6-hexanediol bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] (Irganox 259), octadecyl β-(4-hydroxy-3,5-di-tert-butylphenyl)propionate (Irganox 1076), or 3,9-bis{2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)acrylic acid]-1,1-dimethyl}-2,4,8,10-tetraoxaspirocycloundecane (ADK AO-80).

[0046] The phosphite antioxidant is one or more of tris(2,4-di-tert-butylphenyl) phosphite (Irganox 168), bis(2,6-di-tert-butyl-4-tolyl) pentaerythritol phosphite (PEP-36), or 627A.

[0047] This invention also protects a method for preparing the above-mentioned dustproof styrene-based composition, comprising the following steps:

[0048] S1. Mix all components of the above dustproof styrene-based composition except for the reinforcing agent to obtain a premix;

[0049] S2. The premixed material is fed in through the main feed port, and the reinforcing agent is fed in through the side feed port. The mixture is then melt-blended and extruded into granules.

[0050] Specifically, a high-speed mixer is used for mixing in step S1.

[0051] Specifically, the mixing temperature is 20–50°C, the mixing speed is 100–800 rpm, and the mixing time is 2–5 minutes.

[0052] Furthermore, the extrusion granulation is performed using a twin-screw extruder.

[0053] Specifically, the twin-screw extruder has a feeding speed of 200-350 rpm, a main machine speed of 100-500 rpm, and a vacuum degree of ≤0.1 MPa.

[0054] Specifically, the temperature of the twin-screw extruder is 220-250℃ in zone one, 220-240℃ in zone two, 210-220℃ in zone three, 210-230℃ in zone four, 210-230℃ in zone five, and 220-230℃ in the die.

[0055] Specifically, the length-to-diameter ratio of the twin-screw extruder is (36-48):1.

[0056] This invention also protects the use of the above-mentioned dustproof styrene-based composition in the preparation of materials for household appliances, particularly suitable for air conditioner fan blade materials.

[0057] The present invention also provides an air conditioner fan blade, which is prepared using the above-mentioned dustproof styrene-based composition.

[0058] Compared with the prior art, the present invention has the following beneficial effects:

[0059] This invention provides a dustproof styrene-based composition. By compounding with a styrene-acrylonitrile copolymer of a specific weight-average molecular weight and adjusting its acrylonitrile content, and adding an appropriate amount of carbon fiber, the dynamic dustproof effect of the composition can be effectively improved. It is especially suitable for applications in materials such as air conditioner fan blades. Detailed Implementation

[0060] The present invention will be further described in detail below with reference to specific embodiments. These embodiments are only used to explain the present invention and are not intended to limit the scope of the present invention. Unless otherwise specified, the experimental methods used in the following embodiments are conventional methods; the materials and reagents used are commercially available unless otherwise specified.

[0061] 1. Raw materials used in each embodiment and comparative example:

[0062] Styrene-acrylonitrile copolymer A:

[0063] Styrene-acrylonitrile copolymer A1: Acrylonitrile content is 33wt%, weight average molecular weight is 110,000, self-made;

[0064] Styrene-acrylonitrile copolymer A2: Acrylonitrile content is 33wt%, weight average molecular weight is 118000, self-made;

[0065] Styrene-acrylonitrile copolymer A3: Acrylonitrile content is 33wt%, weight average molecular weight is 102000, self-made;

[0066] Styrene-acrylonitrile copolymer A4: SAN-355, acrylonitrile content 31.8 wt%, weight average molecular weight 113,000; purchased from Daqing Petrochemical.

[0067] Styrene-acrylonitrile copolymer A5: Acrylonitrile content is 27wt%, weight average molecular weight is 110,000, self-made;

[0068] Styrene-acrylonitrile copolymer A6: Acrylonitrile content is 33wt%, weight average molecular weight is 80,000, self-made;

[0069] Styrene-acrylonitrile copolymer A7: Acrylonitrile content is 33wt%, weight average molecular weight is 150,000, self-made;

[0070] Styrene-acrylonitrile copolymer A8: Acrylonitrile content is 25wt%, weight average molecular weight is 110,000, self-made;

[0071] Styrene-acrylonitrile copolymer B:

[0072] Styrene-acrylonitrile copolymer B1: Acrylonitrile content is 33wt%, weight average molecular weight is 530,000, self-made;

[0073] Styrene-acrylonitrile copolymer B2: Acrylonitrile content is 33wt%, weight average molecular weight is 510,000, self-made;

[0074] Styrene-acrylonitrile copolymer B3: Acrylonitrile content is 33wt%, weight average molecular weight is 560,000, self-made;

[0075] Styrene-acrylonitrile copolymer B4: Acrylonitrile content is 33wt%, weight average molecular weight is 590,000, self-made;

[0076] Styrene-acrylonitrile copolymer B5: EPA-100, acrylonitrile content 32wt%, weight average molecular weight 520,000; purchased from Weihai Jinhesi Chemical.

[0077] Styrene-acrylonitrile copolymer B6: Acrylonitrile content is 28wt%, weight average molecular weight is 530,000, self-made;

[0078] Styrene-acrylonitrile copolymer B7: Acrylonitrile content is 33wt%, weight average molecular weight is 450,000, self-made;

[0079] Styrene-acrylonitrile copolymer B8: Acrylonitrile content is 33wt%, weight average molecular weight is 650,000, self-made;

[0080] Styrene-acrylonitrile copolymer B9: Acrylonitrile content is 25wt%, weight average molecular weight is 530,000, self-made;

[0081] The self-made styrene-acrylonitrile copolymer described in this invention is prepared by the following method:

[0082] Acrylonitrile monomer and styrene monomer are polymerized at 150-160℃ for 1-4 hours to obtain a styrene-acrylonitrile copolymer with a weight-average molecular weight. The weight-average molecular weight can be controlled by adjusting the time of adding the molecular weight regulator, and the acrylonitrile content in the styrene-acrylonitrile copolymer can be controlled by adjusting the feeding ratio of styrene monomer and acrylonitrile monomer.

[0083] Styrene-acrylonitrile copolymer C: KFA-180, with an acrylonitrile content of 32wt% and a weight-average molecular weight of 180,000, was purchased from Liaoning Jinfeng.

[0084] Enhancer:

[0085] Reinforcing agent 1: Glass fiber: ECS13-4.5-534, with an average diameter of 13μm, purchased from China Jushi;

[0086] Reinforcing agent 2: Carbon fiber: PX35CA0250-65, average diameter 14μm, purchased from Toray Industries, Japan;

[0087] Reinforcing agent 3: Talc powder: TYT-777A, purchased from Haicheng Tianyuan Chemical Co., Ltd.

[0088] Compatibilizer:

[0089] Compatibilizer 1: Maleic anhydride polymer, styrene-maleic anhydride copolymer, SMA700, purchased from Jiaxing Huawen;

[0090] Compatibilizer 2: Acrylic ester polymer, styrene-acrylonitrile-glycidyl methacrylate copolymer, SAG-002, purchased from Jia Yi Rong;

[0091] Lubricant:

[0092] Lubricant 1: Erucamide, commercially available;

[0093] Lubricant 2: Oleamide, commercially available;

[0094] Lubricant 3: N,N'-Ethylene bis-stearamide, commercially available;

[0095] Lubricant 4: Zinc stearate, commercially available;

[0096] Additives:

[0097] Antioxidant: A mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:2; It should be noted that the same raw materials were used in the parallel experiments of each embodiment and comparative example of the present invention.

[0098] 2. The styrene-based compositions described in the embodiments and comparative examples of the present invention are prepared according to the formulations in Tables 1-2 by the following method, including the following steps:

[0099] S1. Premix the components other than the reinforcing agent in a high-speed mixer according to the proportion. The mixing temperature is 30℃, the mixing speed is 500rpm, and the mixing time is 3 minutes. Mix evenly to obtain a premix.

[0100] S2. The premixed material described in step S1 is fed into a twin-screw extruder through the main feed port, and the reinforcing agent is fed in through the side feed port. The mixture is obtained by melt blending and extrusion granulation. The feeding speed of the twin-screw extruder is 275 rpm, the main machine speed is 350 rpm, and the vacuum degree is 0.08 MPa.

[0101] Specifically, the temperature of the twin-screw extruder is 235°C in zone one, 230°C in zone two, 215°C in zone three, 220°C in zone four, 220°C in zone five, and 225°C in the die.

[0102] Specifically, the length-to-diameter ratio of the twin-screw extruder is 48:1.

[0103] 3. Performance Testing

[0104] (1) Surface resistivity measurement: The styrene-based compositions prepared in each example and comparative example were injection molded into square plate samples of 3mm*10mm*10mm and measured according to the standard ASTM D257-2014.

[0105] (2) Dynamic dustproof level determination: First, cross-flow fan blades are prepared. The cross-flow fan blades are prepared by injection molding the end caps, top caps, fan blades and other related components of the cross-flow fan blades using an injection molding machine. Then, the cross-flow fan blades suitable for use in air conditioning indoor units are finally prepared by welding using the most commonly used ultrasonic welding technology in the industry. The cross-flow fan blades weigh 500g and are continuously run at a speed of 800 rpm for 1000 hours. Then, the cross-flow fan blades are weighed. If the weight increases by more than 2%, it is classified as level four; if the weight increases by 1 to 2% (excluding 2%), it is classified as level three; if the weight increases by 0.5 to 1% (excluding 1%), it is classified as level two; and if the weight increases by less than 0.5% (excluding 0.5%), it is classified as level one.

[0106] (3) Tensile strength test: The styrene-based compositions in each example and comparative example were injection molded into dumbbell-shaped tensile specimens according to ISO standard and tested in accordance with ISO 527-1-2012 standard.

[0107] Examples 1-18 and Comparative Examples 1-8

[0108] The dosage of each component and the performance test results of the compositions in the examples and comparative examples are shown in Tables 1-2.

[0109] Table 1. Dosage (parts by weight) and properties of each component in the dustproof styrene-based compositions of Examples 1-14

[0110]

[0111]

[0112] Table 2. Amounts (parts by weight) and properties of each component in the styrene-based compositions of Examples 15-18 and Comparative Examples 1-8

[0113]

[0114]

[0115] As can be seen from Table 1, the dustproof styrene-based compositions prepared in the various embodiments of the present invention have good dynamic dustproof effects, specifically: the dynamic dustproof level is not lower than level two, and the surface resistivity is not higher than 3.6*10. 5 Ω.

[0116] As can be seen from Examples 1 to 3, when the weight average molecular weight of styrene-acrylonitrile copolymer A is further adjusted to 105,000 to 115,000, the resulting dustproof styrene-based composition has better overall performance.

[0117] As can be seen from Examples 1 and 4-6, when the weight average molecular weight of styrene-acrylonitrile copolymer B is 520,000 to 570,000, the resulting dustproof styrene-based composition has better overall performance.

[0118] As can be seen from Comparative Examples 1 to 4, when the weight-average molecular weight of styrene-acrylonitrile copolymer A or B is too small or too large, it will affect the dispersion and distribution of glass fiber and carbon fiber in the system, resulting in a lower dynamic dustproof level of the material.

[0119] As can be seen from Comparative Example 5, if only a styrene-acrylonitrile copolymer with a suitable weight-average molecular weight is used, the dustproof level of the resulting composition is still relatively poor.

[0120] As can be seen from Comparative Examples 6 and 7, when the acrylonitrile content in the styrene-acrylonitrile copolymer A or B is low, the dustproof level of the resulting styrene-based composition is poor.

[0121] As can be seen from Comparative Example 8, if the carbon fiber content in the reinforcing agent is less than 50 wt%, the dustproof styrene-based composition obtained has a lower dustproof rating than the example.

[0122] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A dust resistant styrene-based composition characterized in that, The composition comprises the following components by weight: styrene-acrylonitrile copolymer A 40-80 parts; styrene-acrylonitrile copolymer B 5-20 parts; reinforcing agent 20-40 parts; compatibility agent 0.1-10 parts; The styrene-acrylonitrile copolymer A has a weight average molecular weight of 100000-120000 and an acrylonitrile content of not less than 26wt%; The styrene-acrylonitrile copolymer B has a weight average molecular weight of 500000-600000 and an acrylonitrile content of not less than 26wt%; The reinforcing agent contains carbon fibers, wherein the content of carbon fibers in the reinforcing agent is not less than 50wt%.

2. The dust resistant styrene-based composition of claim 1, wherein, The styrene-acrylonitrile copolymer A has a weight average molecular weight of 105000-115000.

3. The dust resistant styrene-based composition of claim 1, wherein, The styrene-acrylonitrile copolymer B has a weight average molecular weight of 520000-570000.

4. The dust-free styrene-based composition according to claim 1, wherein It further comprises 1.5-5 parts of lubricant, which is an amide lubricant.

5. The dust-free styrene-based composition according to claim 4, wherein The amide lubricant comprises one or more of erucic acid amide, oleic acid amide or N,N'-ethylene bis-stearamide.

6. The dust-free styrene-based composition according to claim 1, wherein The compatibility agent comprises maleic anhydride polymer and / or acrylate polymer.

7. The dust-free styrene-based composition according to claim 1, wherein The reinforcing agent further comprises one or more of glass fiber, talc, wollastonite, whisker or glass microbead.

8. The dust-free styrene-based composition according to claim 1, wherein The acrylonitrile content of the styrene-acrylonitrile copolymer A is 27-33wt%, and the acrylonitrile content of the styrene-acrylonitrile copolymer B is 27-33wt%.

9. The dust-free styrene-based composition according to claim 1, wherein It further comprises 0.1-5 parts of auxiliary agent, which comprises one or more of antioxidant, weather-resistant agent or toner.

10. A process for the production of the dustproof styrene-based composition according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: S1. mixing the components other than the reinforcing agent in the above dustproof styrene-based composition to obtain a premix; S2. feeding the premix through the main feeding port and feeding the reinforcing agent through the side feeding port, and then obtaining by melt blending and extrusion granulation.

11. Use of the dustproof styrene-based composition according to any one of claims 1-9 in the preparation of household appliance materials.

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