Hips alloy material, and preparation method therefor and use thereof

Abstract

The present invention belongs to the technical field of engineering plastics. Disclosed are an HIPS alloy material, and a preparation method therefor and the use thereof. The HIPS alloy material comprises the following components in parts by mass: 58-82 parts of an HIPS resin, 18-42 parts of an ASA powder, 10-18 parts of a phosphorus-based flame retardant, 3-9 parts of a nitrogen-based flame retardant, 4-12 parts of hollow glass beads, and 1-9 parts of a compatibilizer, wherein in the ASA powder, the mass content of an acrylate is 53-66%; and the average particle size of the hollow glass beads is 38-82 μm. The HIPS alloy material provided by the present invention has good flame retardance and mechanical properties; and the preparation method provided by the present invention is simple, and is beneficial to actual production.

Description

HIPS alloy material and preparation method and application thereof

[0001] The present application claims priority to the Chinese patent application No. 202411276689.0, filed on September 12, 2024, and entitled "HIPS alloy material and preparation method and application thereof", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application belongs to the technical field of high polymer engineering plastics, and particularly relates to a HIPS (high impact polystyrene) alloy material and a preparation method and application thereof. BACKGROUND

[0003] GPPS, i.e. general purpose polystyrene, is a general purpose plastic with high rigidity, high gloss, high flow and dimensional stability, etc., and is widely used in the fields of household appliances, office equipment and automobiles, etc. However, its poor toughness limits its application in fields with high toughness requirements. At present, the most common method to improve the poor impact performance of general purpose polystyrene is to modify the general purpose polystyrene by adding polybutadiene rubber to form high impact polystyrene (HIPS). The improvement of toughness greatly broadens the application range of PS materials. However, HIPS itself is a flammable material, which is prone to dripping and burning through during the burning process, thereby failing to meet the 5VA flame retardant grade. Therefore, a considerable proportion of bromine-antimony flame retardant and anti-dripping agent is usually added to have the 5VA flame retardant grade. However, the bromine-based flame retardant and anti-dripping agent (commonly used polytetrafluoroethylene) have two major problems of high price and environmental pollution.

[0004] At present, thinning (thickness ≤ 2mm) has become a development trend of many products, such as televisions, printers and automotive interiors, etc., which leads to higher and higher requirements for flame retardant performance. Since the 5VA flame retardant grade is higher than the V-0 flame retardant grade, meeting the 5VA flame retardant performance has become an important development direction of many materials to meet the requirements of high flame retardant performance after thinning of products. Chinese patent (CN112745591B) discloses a flame-retardant high-rigidity PS / PPE composite material and a preparation method thereof. The scheme uses a combination of bromine-based flame retardant and glass fiber to achieve the 5VA flame retardant grade. However, the use of bromine-based flame retardant cannot meet the halogen-free environmental protection requirement, and the patent does not explore whether the thinning product prepared therefrom can still meet the 5VA flame retardant grade. Chinese patent (CN117757208A) discloses a polystyrene material, which can achieve the 5VA flame retardant grade of a product with a thickness of 2mm. However, the anti-dripping agent is added in the formula, which not only poses a threat to the environment, but also damages the mechanical properties of the product to some extent. SUMMARY

[0005] The present application aims to overcome the deficiencies of the prior art and provide a HIPS alloy material capable of meeting the 5VA flame retardant level in a thin-walled state (thickness ≤ 2 mm), as well as a preparation method and application thereof.

[0006] To achieve the above-mentioned object, the technical scheme adopted by the present application is as follows:

[0007] A HIPS alloy material, wherein the HIPS alloy material comprises the following components by mass:

[0008] HIPS resin 58-82 parts, ASA powder 18-42 parts, phosphorus-based flame retardant 10-18 parts, nitrogen-based flame retardant 3-9 parts, hollow glass microbeads 4-12 parts, and a compatibilizer 1-9 parts;

[0009] The mass content of the acrylate in the ASA powder is 53-66%.

[0010] The average particle size of the hollow glass microbeads is 38-82 μm.

[0011] In some embodiments, the HIPS alloy material comprises the following components by mass: HIPS resin 58-82 parts, ASA powder 25-32 parts, phosphorus-based flame retardant 10-18 parts, nitrogen-based flame retardant 3-9 parts, hollow glass microbeads 8-9 parts, and a compatibilizer 5-6 parts.

[0012] In some embodiments, the rubber mass content of the HIPS resin is 15-28%.

[0013] In some embodiments, the compatibilizer comprises at least one of styrene-maleic anhydride copolymer, maleic anhydride grafted SEBS, silicone, and maleic anhydride grafted ABS.

[0014] In some embodiments, the phosphorus-based flame retardant comprises at least one of bisphenol A-bis(diphenyl phosphate) and triphenyl phosphate.

[0015] In some embodiments, the nitrogen-based flame retardant comprises at least one of melamine cyanurate and dicyandiamide.

[0016] In some embodiments, the HIPS alloy material further comprises 0.1-1 parts of a processing aid.

[0017] The present application also provides a preparation method of the HIPS alloy material, wherein the preparation method comprises the following steps: weighing and mixing the dried raw materials, feeding them into a twin-screw extruder, extruding, drawing, cooling, granulating, drying, and obtaining the HIPS alloy material.

[0018] In some embodiments, the parameters of the twin-screw extruder are as follows: the length-diameter ratio of the twin-screw extruder is (40-36):1, the screw rotation speed is 250-300 rpm, and the extrusion temperature is 190-200 DEG C.

[0019] The application also provides the use of the HIPS alloy material in the preparation of flame-retardant ultra-thin materials.

[0020] In some embodiments, the use includes the use in the preparation of household appliance shells, printer panels, and automotive interiors.

[0021] Compared with the prior art, the application has the following beneficial effects:

[0022] The HIPS alloy material provided by the application can meet the 5VA flame-retardant grade without adding an anti-dripping agent, does not contain halogen, and has good toughness and strength when the product is prepared into a thin-walled product (thickness ≤2 mm). 2 The bending strength is greater than or equal to 27.5 MPa, and the flame-retardant performance meets the 2.0 mm 5VA grade; and the preparation method of the HIPS alloy material is simple and conducive to actual production. DETAILED DESCRIPTION

[0023] To better illustrate the purpose, technical solution and advantages of the application, the application will be further described below in combination with specific examples.

[0024] In the first aspect of the application, the application provides a HIPS alloy material, which comprises the following components by mass: HIPS resin 58-82 parts, ASA (Acrylate-Styrene-Acrylonitrile) powder 18-42 parts, phosphorus-based flame retardant 10-18 parts, nitrogen-based flame retardant 3-9 parts, hollow glass microsphere 4-12 parts, and compatibility agent 1-9 parts.

[0025] The mass content of the acrylate in the ASA powder is 53-66%.

[0026] The average particle size of the hollow glass microsphere is 38-82 μm.

[0027] The HIPS alloy material provided by the application can meet the halogen-free 5VA flame-retardant grade when prepared into a thin-walled product (thickness ≤2 mm), and the 5VA flame-retardant grade is realized without adding an anti-dripping agent, and the obtained product has good toughness and rigidity.

[0028] The flame retardant grade is a grading system for measuring the ability of a material to suppress the spread of flame, reflecting the characteristics of the material itself or after treatment to delay combustion, and providing a basis for fire safety assessment. The flame retardant test of the application is carried out according to the UL94 standard (UL94, Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances). The 5V flame retardant grade refers to the flame and afterburning being extinguished within 60 seconds after five 5-second combustion tests, and the block sample is not allowed to be burned through (see UL94, Section 9, 500W (125mm) Vertical Burning Test; 5VA or 5VB). The flame retardant performance of the material of the 5VA grade is very high, which represents that the material can also resist combustion well when encountering a more intense fire source.

[0029] Specifically, the addition of the ASA glue powder with a specific mass content range of acrylate can fully exert the characteristics of the coexistence of polarity and non-polarity, play a bridging role between the polar hollow glass microspheres and the non-polar HIPS resin, effectively enhance the bonding force between the two, and improve the melt strength of the material, thereby improving the flame retardant performance and mechanical properties of the product. The addition of the hollow glass microspheres with a specific average particle size range not only can play a role in heat insulation and slowing down the speed of heat transfer, but also can play a role as a network node, enhance the melt strength of the material, prevent the material from being burned through, and further help to improve the flame retardant performance and mechanical properties of the product; and the hollow glass microspheres are low-density materials, which can reduce the density of the HIPS alloy material as a component of the HIPS alloy material, thereby reducing the production cost. In addition, the addition of the compatibilizer with a specific mass fraction range can effectively improve the compatibility of the HIPS resin and the ASA glue powder, thereby improving the overall compatibility of the system and improving the comprehensive effect of the product.

[0030] The mass content of the acrylate in the ASA powder is calculated by gas chromatography. This method is based on the separation characteristics of different substances in the gas chromatography column, and uses the volatility of acrylate in the sample for quantitative analysis by the detector of the gas chromatograph. The specific steps are as follows: first, prepare the sample. Dissolve the sample to be tested in a suitable solvent to prepare a sample solution of a certain concentration. At the same time, add an internal standard for correction in quantitative analysis. Then, inject the sample solution into the gas chromatograph for testing, and according to the results, quantitative analysis is carried out to obtain the mass content of acrylate in the ASA powder.

[0031] The average particle size of the hollow glass microsphere is obtained by laser particle size analyzer.

[0032] Exemplarily, the mass of the HIPS resin can be any point value between 58-82 parts or a range value composed of any two point values, such as 60-80 parts, or 58 parts, 60 parts, 62 parts, 64 parts, 66 parts, 68 parts, 70 parts, 72 parts, 74 parts, 76 parts, 78 parts, 80 parts, 82 parts, etc. or a range value composed of any two of the point values; the ASA powder can be any point value between 18-42 parts or a range value composed of any two point values, such as 20-40 parts, or 18 parts, 20 parts, 22 parts, 24 parts, 26 parts, 28 parts, 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, 42 parts, etc. or a range value composed of any two of the point values; the phosphorus-based flame retardant can be any point value between 10-18 parts or a range value composed of any two point values, such as 12-16 parts, or 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, etc. or a range value composed of any two of the point values; the nitrogen-based flame retardant can be any point value between 3-9 parts or a range value composed of any two point values, such as 5-7 parts, or 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, etc. or a range value composed of any two of the point values; the hollow glass microsphere can be any point value between 4-12 parts or a range value composed of any two point values, such as 6-10 parts, or 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, etc. or a range value composed of any two of the point values; the compatibilizer can be any point value between 1-9 parts or a range value composed of any two point values, such as 3-7 parts, or 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, etc. or a range value composed of any two of the point values.

[0033] Exemplarily, the mass content of the acrylate in the ASA glue powder can be any point value between 53-66% or a range value composed of any two point values, such as 55-64%, or can be 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, etc. or a range value composed of any two of the point values.

[0034] Exemplarily, the average particle size of the hollow glass microsphere can be any point value between 38-82 μm or a range value composed of any two point values, such as 40-80 μm, or can be 38 μm, 40 μm, 42 μm, 45 μm, 48 μm, 50 μm, 52 μm, 55 μm, 58 μm, 60 μm, 62 μm, 65 μm, 68 μm, 70 μm, 72 μm, 75 μm, 78 μm, 80 μm, 82 μm, etc. or a range value composed of any two of the point values.

[0035] In some embodiments, the mass content of the acrylate in the ASA glue powder is 56-60%.

[0036] In some embodiments, the average particle size of the hollow glass microsphere is 55-65 μm.

[0037] In some embodiments, the mass percentage of the ASA glue powder in the HIPS alloy material is 12-38%, and the mass percentage of the hollow glass microsphere is 2-12%.

[0038] As a preferred embodiment of the HIPS alloy material of the present application, the HIPS alloy material comprises the following components in mass parts: ASA glue powder 25-32 parts, hollow glass microsphere 8-9 parts, and compatibilizer 5-6 parts.

[0039] The present application researches and finds that the adding amount of the ASA glue powder, the hollow glass microsphere and the compatibilizer will affect the performance of the product, and when the mass parts of the three are further selected within the above range, the comprehensive performance of the obtained product is better.

[0040] As a preferred embodiment of the HIPS alloy material of the present application, the rubber mass content of the HIPS resin is 15-28%.

[0041] Specifically, the rubber mass content of the HIPS resin refers to the mass content of butadiene, and the rubber mass content of the HIPS resin is obtained by solvent extraction method, specifically as follows: first, the HIPS sample is fully mixed with a suitable solvent (such as benzene, xylene, etc.) to dissolve the butadiene rubber in the solvent to form a solution. Then, the rubber residue is obtained by evaporating the solvent. Finally, the rubber residue mass is compared with the initial HIPS sample mass, and the rubber content is obtained.

[0042] Exemplarily, the rubber mass content of the HIPS resin can be any point value between 15-28% or a range value composed of any two point values, such as 18-25%, or can be 15%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 28%, etc. or a range value composed of any two of the point values.

[0043] In some embodiments, the rubber mass content of the HIPS resin can be 20-22%.

[0044] The present application studies find that the rubber mass content of the HIPS resin will affect the mechanical properties of the product, and also has a certain influence on the flame retardant performance of the product, and when the rubber mass content of the HIPS resin is further selected to be 15-28%, especially 20-22%, the comprehensive effect of the obtained product is more optimal.

[0045] As a preferred embodiment of the HIPS alloy material of the present application, the compatibilizer includes at least one of styrene-maleic anhydride copolymer, maleic anhydride grafted SEBS (Styrene Ethylene Butylene Styrene), silicone, maleic anhydride grafted ABS (Acrylonitrile Butadiene Styrene).

[0046] In some embodiments, the compatibilizer includes at least one of styrene-maleic anhydride copolymer, maleic anhydride grafted SEBS.

[0047] The present application studies find that the selection of the compatibilizer will affect the compatibility between the components, thereby affecting the melt strength of the product, and further affecting the comprehensive performance of the product, and when the compatibilizer is further selected to be the above-mentioned category of substances, the comprehensive performance of the obtained product is more optimal.

[0048] As a preferred embodiment of the HIPS alloy material of the present application, the phosphorus-based flame retardant includes at least one of bisphenol A-bis(diphenyl phosphate), triphenyl phosphate.

[0049] As a preferred embodiment of the HIPS alloy material of the present application, the nitrogen-based flame retardant includes at least one of melamine cyanurate, dicyandiamide.

[0050] As a preferred embodiment of the HIPS alloy material of the present application, the HIPS alloy material further includes 0.1-1 parts of a processing aid.

[0051] In some embodiments, the processing aid includes at least one of an antioxidant, a lubricant.

[0052] Exemplarily, the antioxidant comprises at least one of a hindered phenolic antioxidant, a hindered amine antioxidant, and a phosphite antioxidant.

[0053] Exemplarily, the lubricant comprises at least one of a stearic acid amide lubricant and a zinc stearate lubricant.

[0054] In the second aspect of the present application, the present application further provides a preparation method of the HIPS alloy material, which comprises the following steps: weighing and mixing the dried raw materials, feeding into a twin-screw extruder, extruding, drawing, cooling, cutting, drying, and obtaining the HIPS alloy material.

[0055] In some embodiments, the parameters of the twin-screw extruder are as follows: the length-diameter ratio of the twin-screw extruder is (40-36): 1, the screw rotation speed is 250-300 rpm, and the extrusion temperature is 190-200℃.

[0056] In the third aspect of the present application, the present application further provides an application of the HIPS alloy material in preparing a flame-retardant ultra-thin material.

[0057] Exemplarily, the HIPS alloy material is applied in preparing various household appliance shells, printer panels, automobile interiors, and the like.

[0058] In the fourth aspect of the present application, the present application further provides a flame-retardant ultra-thin material, which is obtained by injection molding or extrusion of the HIPS alloy material.

[0059] Exemplarily, the flame-retardant ultra-thin material is various household appliance shells, printer panels, automobile interiors, and the like.

[0060] The reagents, methods and devices used in the present application are all conventional reagents, methods and devices in the art unless otherwise specified.

[0061] HIPS-1: PS1180, the mass content of rubber is 21.4 w.t.%, U.S. Sunwin;

[0062] HIPS-2: PS HI-425TVL, the mass content of rubber is 18.1 w.t.%, South Korea Jinhu Petrochemical Co., Ltd.;

[0063] HIPS-3: PS PH-888G, the mass content of rubber is 25.0 w.t.%, Taiwan Gaoke Chemical Co., Ltd.;

[0064] HIPS-4: PS 514P, the mass content of rubber is 15.3 w.t.%, Shanghai Saikuo Petrochemical Co., Ltd.;

[0065] HIPS-5: PS1110, rubber mass content 27.2 w.t.%, Sumitomo (Shanghai) Interox Co., Ltd;

[0066] ASA powder 1 : M800, acrylate mass content 58 w.t.%, Zhejiang Suiqi New Material Co., Ltd;

[0067] ASA powder 2: A600N, acrylate mass content 55 w.t.%, Zhejiang Changhong Plastic Raw Material Co., Ltd;

[0068] ASA powder 3: Q350KL, acrylate mass content 64 w.t.%, Zhejiang Suiqi New Material Co., Ltd;

[0069] ASA powder 4: XC-500A, acrylate mass content 50 w.t.%, South Korea Kumho Petrochemical Co., Ltd;

[0070] ASA powder 5: EM500, acrylate mass content 70 w.t.%, Dongguan Huiyi Chemical Material Co., Ltd;

[0071] Hollow glass microbeads 1 : HN20, average particle size 60 pm, Shanxi Hainuo Science and Technology Co., Ltd;

[0072] Hollow glass microbeads 2: 320#, average particle size 40 pm, Lingshou Baiyi Mineral Products Co., Ltd;

[0073] Hollow glass microbeads 3: 220#, average particle size 80 pm, Lingshou Baiyi Mineral Products Co., Ltd;

[0074] Hollow glass microbeads 4: HN16K, average particle size 30 pm, Shanxi Hainuo Science and Technology Co., Ltd;

[0075] Hollow glass microbeads 5: 180#, average particle size 90 pm, Lingshou Baiyi Mineral Products Co., Ltd;

[0076] Solid glass microbeads 6: 220 mesh glass microbeads, average particle size 50 pm, Oukai Mineral Products Co., Ltd;

[0077] Compatibilizer 1 : SEBS FG1901 GT, maleic anhydride grafted SEBS, Kraton Corporation, USA;

[0078] Compatibilizer 2: SMA 700, styrene-maleic anhydride copolymer, Shanghai Huawen Electronic New Material Co., Ltd;

[0079] Compatibilizer 3: KT-2, maleic anhydride grafted ABS, Shenyang Ketong Plastic Co., Ltd;

[0080] Compatibilizer 4: MB50-002, silicone, Dow Corning Corporation;

[0081] Phosphorus flame retardant: Bisphenol A-bis(diphenyl phosphate), commercially available;

[0082] Nitrogen flame retardant: Melamine cyanurate, commercially available;

[0083] Antioxidant: Hindered amine antioxidant, commercially available;

[0084] Lubricant: Stearic acid amide lubricant, commercially available.

[0085] The antioxidant and lubricant used in the parallel experiments of the examples and comparative examples are consistent.

[0086] Examples 1-16 and Comparative Examples 1-9

[0087] The examples and comparative examples of the present application provide a HIPS alloy material, the component content (mass parts) of which is shown in Tables 1-3;

[0088] Table 1

[0089] Table 2

[0090] Table 3

[0091] The preparation method of the HIPS alloy material provided by Example 1 is as follows:

[0092] After the dried raw materials are weighed and mixed, they are fed into a twin-screw extruder, extruded, drawn, cooled, granulated, dried, and the HIPS alloy material is obtained.

[0093] The parameters of the twin-screw extruder are as follows: the length-diameter ratio of the twin-screw extruder is 40:1, the screw rotation speed is 280 rpm, and the extrusion temperature is 195℃.

[0094] The preparation method of the HIPS alloy material provided by Examples 2-16 and Comparative Examples 1-9 is consistent with that of Example 1, and no related components are added.

[0095] Effect Example

[0096] The effect example verifies the performance of the products prepared by the examples and comparative examples; the test items include the following aspects:

[0097] 1. Bending strength test: the test standard refers to “ISO 178-2010 Determination of the flexural properties of plastics”;

[0098] 2. Izod notched impact strength test: the test standard refers to ISO 180-2000 Determination of Izod impact strength of plastics, and the notch type is A type;

[0099] 3. 5VA flame retardant test: the test standard refers to UL 94-2018 Test for flammability of plastic materials for parts in devices and appliances, and the sample thickness is 1.5 / 2.0 mm;

[0100] The test results are shown in Table 4;

[0101] Table 4

[0102] As can be seen from Table 4, when the technical scheme of the present application is adopted, the product obtained has excellent mechanical properties and flame retardant properties; specifically, the Izod notched impact strength of the product obtained is 18.3kJ / m2 or more, the flexural strength is 27.5MPa or more, and all have 2.0mm 5VA flame retardant grade. 2 The above, the flexural strength is 27.5MPa or more, all have 2.0mm 5VA flame retardant grade;

[0103] As can be seen from Examples 1-4 and Comparative Examples 1-3, the mass of the components has a great influence on the comprehensive performance of the product, when the mass of the components in Comparative Examples 1-3 is not within the range given by the present application, the flame retardant performance of the product obtained decreases significantly, and cannot meet the 2.0mm 5VA flame retardant grade; and when the mass of the components is further selected within the preferred range of the present application (Examples 1-2), the product obtained can meet the 1.5mm 5VA flame retardant grade;

[0104] As can be seen from Examples 1, Examples 10-11 and Comparative Examples 8-9, the mass content of acrylate in the ASA powder also affects the performance of the product, when the mass content of acrylate in the ASA powder in Comparative Examples 8-9 is not within the range given, the product obtained cannot meet the thin-walled (thickness ≤2.00mm) 5VA flame retardant grade;

[0105] As can be seen from Examples 1, Examples 12-13 and Comparative Examples 5-6, the average particle size of the hollow glass microsphere also affects the flame retardant performance of the product, when the average particle size of the hollow glass microsphere in Comparative Examples 5-6 is not within the range given by the present application, the product obtained cannot meet the thin-walled (thickness ≤2.00mm) 5VA flame retardant grade; As can be seen from Example 1 and Comparative Example 4, when no hollow glass microspheres are added, the product obtained not only cannot meet the 5VA flame retardant grade, but also shows a certain downward trend in flexural strength; As can be seen from Example 1 and Comparative Example 7, when the hollow glass microspheres are replaced by solid glass microspheres, the product obtained also cannot meet the thin-walled (thickness ≤2.00mm) 5VA flame retardant grade.

[0106] It should be pointed out finally that the above embodiments are used to illustrate the technical solutions of the present application but not to limit the protection scope of the present application, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present application.

Claims

1. A HIPS alloy material, wherein, The HIPS alloy material comprises the following components by mass fraction: HIPS resin 58-82 parts, ASA powder 18-42 parts, phosphorus flame retardant 10-18 parts, nitrogen flame retardant 3-9 parts, hollow glass microsphere 4-12 parts, and compatibilizer 1-9 parts. The mass content of acrylate in the ASA powder is 53-66%. The average particle size of the hollow glass microsphere is 38-82 μm.

2. The HIPS alloy material of claim 1, wherein, The HIPS alloy material comprises the following components by mass fraction: HIPS resin 58-82 parts, ASA powder 25-32 parts, phosphorus flame retardant 10-18 parts, nitrogen flame retardant 3-9 parts, hollow glass microsphere 8-9 parts, and compatibilizer 5-6 parts.

3. The HIPS alloy material of claim 1, wherein, The rubber mass content of the HIPS resin is 15-28%.

4. The HIPS alloy material of claim 1, wherein, The compatibilizer comprises at least one of styrene-maleic anhydride copolymer, maleic anhydride grafted SEBS, silicone, and maleic anhydride grafted ABS.

5. The HIPS alloy material of claim 1, wherein, The phosphorus flame retardant comprises at least one of bisphenol A-bis(diphenyl phosphate) and triphenyl phosphate.

6. The HIPS alloy material of claim 1, wherein, The nitrogen flame retardant comprises at least one of melamine cyanurate and dicyandiamide.

7. The HIPS alloy material of claim 1, wherein, The HIPS alloy material further comprises 0.1-1 part of processing aid.

8. The method of producing a HIPS alloy material according to any one of claims 1 to 7, wherein The preparation method comprises the following steps: weighing and mixing the dried raw materials, feeding into a double-screw extruder, extruding, drawing, cooling, granulating, drying, and obtaining the HIPS alloy material.

9. The production method according to claim 8, wherein The parameters of the double-screw extruder are as follows: the length-diameter ratio of the double-screw extruder is (40-36):1, the screw rotation speed is 250-300 rpm, and the extrusion temperature is 190-200℃.

10. Use of the HIPS alloy material according to any one of claims 1-7 in preparing flame-retardant ultra-thin material.

11. Use according to claim 10, wherein, The use comprises use in preparing household appliance shell, printer panel, and automotive interior trim.

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