Low-density anti-aging HIPS material and preparation method and application thereof

Abstract

The application relates to the technical field of high-impact polystyrene, in particular to a low-density anti-aging HIPS material and a preparation method and application thereof. The low-density anti-aging HIPS material is prepared from the following raw materials in parts by mass: high-impact polystyrene 50-100 parts, regenerated polyvinyl chloride 10-30 parts, epoxy resin 1-5 parts, nano-zinc oxide 1-5 parts, hindered amine light stabilizer 1-5 parts, foaming agent 5-10 parts, filler 1-5 parts, antioxidant 1-2 parts, compatibilizer 1-2 parts and processing aid 1-2 parts; the foaming agent comprises AC foaming agent, activated silicon dioxide, nano-lanthanum oxide, dicumyl peroxide and polyether amine D230; the activated silicon dioxide is silicon dioxide grafted with a carboxyl-terminated polyamide amine. After being subjected to the action of sunlight, heat and oxygen for a long time, the HIPS material is not prone to phenomena such as yellowing, brittleness, cracking and loss of surface gloss, has excellent anti-aging performance, and has good product mechanical properties and high impact strength.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of high-impact polystyrene, in particular to a low-density anti-aging HIPS material and a preparation method and application thereof. BACKGROUND

[0002] With the rapid growth of the demand for lightweight and multifunctional chemical building materials in the building decoration market, low-foaming polymer materials have ushered in a major development opportunity. At present, low-foaming products such as PVC and EVA have been widely used in building insulation, packaging and other fields, and high-impact polystyrene (HIPS) has become a key material due to its unique comprehensive performance. HIPS foaming products have the advantages of light weight, excellent mechanical strength, chemical corrosion resistance and electrical insulation, and low cost, and have been widely used in building materials, electronic housings, automobile parts and other scenes.

[0003] However, the traditional HIPS material faces serious aging problems in outdoor applications: ultraviolet light causes polymer chain rupture, resulting in yellowing of the product surface and a decrease in gloss; high temperature accelerates the oxidation of molecular chains, resulting in a significant decrease in the impact strength of the material; and the bubble wall becomes brittle due to degradation, and stress concentration leads to cracking.

[0004] The existing technology often sacrifices impact performance to delay aging by adding light stabilizers or increasing crosslinking degree. Therefore, developing a low-density HIPS material with high anti-aging and mechanical performance retention rate has become a key direction to break through the technical bottleneck of the industry. SUMMARY

[0005] The application aims to solve the problems in the prior art and provides a low-density anti-aging HIPS material and a preparation method and application thereof.

[0006] A low-density anti-aging HIPS material, the raw materials of which include, by mass fraction: high-impact polystyrene 50-100 parts, recycled polyvinyl chloride 10-30 parts, epoxy resin 1-5 parts, nano zinc oxide 1-5 parts, hindered amine light stabilizer 1-5 parts, foaming agent 5-10 parts, filler 1-5 parts, antioxidant 1-2 parts, compatibilizer 1-2 parts, and processing aid 1-2 parts; the foaming agent includes AC foaming agent, activated silicon dioxide, nano lanthanum oxide, dicumyl peroxide and polyetheramine D230; the activated silicon dioxide is silicon dioxide grafted with carboxyl-terminated polyamide amine.

[0007] Preferably, the model of the epoxy resin is E51.

[0008] Preferably, the mass ratio of the AC foaming agent, the activated silicon dioxide, the nano lanthanum oxide, the dicumyl peroxide and the polyetheramine D230 is 1-5:1-2:1-2:0.1-0.5:0.01-0.1.

[0009] Preferably, the activated silica is prepared by the following steps: stirring nano-silica, carboxyl-terminated polyamide amine, catalyst and water for 10-20 hours at a stirring temperature of 90-95 DEG C, and spray drying.

[0010] More preferably, the mass ratio of nano-silica to carboxyl-terminated polyamide amine is 10-15:1-3.

[0011] More preferably, the catalyst is p-toluene sulfonic acid.

[0012] Preferably, the filler is nano-calcium carbonate or / and mica powder.

[0013] Preferably, the antioxidant is a multi-hindered phenolic antioxidant.

[0014] Preferably, the compatilizer is maleic anhydride grafted polystyrene.

[0015] Preferably, the processing aid is a stearic amide lubricant.

[0016] The method for preparing the low-density anti-aging HIPS material comprises the following steps:

[0017] S1, mixing high-impact polystyrene, recycled polyvinyl chloride, epoxy resin, nano-zinc oxide, hindered amine light stabilizer, foaming agent, filler, antioxidant, processing aid to obtain a premix;

[0018] S2, extruding the premix and then extruding into a molding die, maintaining pressure for 1-2 minutes, and taking out after the die cools.

[0019] Preferably, in S2, the extrusion is performed in a twin-screw extruder, the screw length-diameter ratio is 1:20-24, and the temperature of each zone is as follows: zone 1, 175-182 DEG C; zone 2, 185-190 DEG C; zone 3, 195-200 DEG C; zone 4, 200-210 DEG C; zone 5, 200-210 DEG C; zone 6, 210-220 DEG C; zone 7, 210-220 DEG C; zone 8, 210-220 DEG C; zone 9, 210-220 DEG C; and the die head, 195-198 DEG C.

[0020] The low-density anti-aging HIPS material is applied as an outdoor protective material. Advantages

[0021] The present application uses HIPS as a base material, and uses recycled polyvinyl chloride in combination with HIPS, which can effectively delay photo-oxidation reaction, and E51 epoxy resin forms a dense protective layer through cross-linking and curing, further in combination with nano-zinc oxide and hindered amine light stabilizer, not only the anti-aging performance is synergistically improved, but also the outdoor service life is long, and the mechanical properties are excellent.

[0022] The foaming agent of the present application utilizes AC foaming agent and activated silicon dioxide, and cooperates with nano lanthanum oxide, not only has good foaming effect in the system, but also ensures low density of the product, under the premise of ensuring low density of the product, the decomposition of dicumyl peroxide in the extruder initiates crosslinking of the PVC chain segment to form rigid cell wall, the polyether amine D230 as an auxiliary curing agent reacts with the E51 epoxy resin to form a flexible crosslinking network, balancing the brittleness caused by the rigid chain segment, at the same time, the AC decomposes and releases gas, and the crosslinking network limits the growth of the cell, and the cooperation of the nano lanthanum oxide can form nucleation points in the melt, effectively control the cell size, and significantly improve the tensile strength of the cell wall; and in the nano activated silicon dioxide, the dendritic macromolecules grafted on the surface can be cured with the epoxy resin, the intermolecular interaction is enhanced, and when subjected to external tensile force, the molecular chain is difficult to slide, thereby further effectively improving the interfacial bonding force of the cell wall and improving the tensile strength of the product.

[0023] The present application not only has excellent anti-aging performance, such as yellowing, brittleness, cracking, loss of surface gloss and the like, after being exposed to sunlight, heat and oxygen for a long time outdoors, but also has good mechanical properties and high impact resistance, and the preparation method is simple and suitable for large-scale popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 Density comparison chart of HIPS materials obtained from example 5 and comparative examples 1-2.

[0025] Figure 2 Tensile strength and impact strength comparison chart of HIPS materials obtained from example 5 and comparative examples 1-2.

[0026] Figure 3 Tensile strength retention rate and impact strength retention rate comparison chart of HIPS materials obtained from example 5 and comparative examples 1-2. DETAILED DESCRIPTION

[0027] The present application will be further described below in combination with specific examples.

[0028] The high impact polystyrene used below is from Zhenjiang Qimei, with a brand of PH88. The recycled polyvinyl chloride used below is recycled by the applicant (batch number 20250107, and the tensile strength is 19.83 MPa). The E51 epoxy resin used below is purchased from Shandong Certain Red New Material Co., Ltd.

[0029] Example 1: A low-density anti-aging HIPS material, the raw materials of which include: high impact polystyrene 500g, recycled polyvinyl chloride 100g, E51 epoxy resin 10g, nano zinc oxide 10g, light stabilizer 944 10g, foaming agent 50g, nano calcium carbonate 5g, mica powder 5g, antioxidant 1010 10g, maleic anhydride grafted polystyrene 1g, and ethylene bis-stearamide 10g.

[0030] The foaming agent is composed of AC foaming agent, activated silicon dioxide, nano lanthanum oxide, dicumyl peroxide, and polyetheramine D230 in a mass ratio of 1:1:1:0.1:0.01. The activated silicon dioxide is prepared by the following steps: 100 g of nano silicon dioxide, 10 g of carboxyl-terminated polyamide amine, 1 g of p-toluenesulfonic acid, and 300 g of water are added to a reaction kettle with a temperature of 90℃, stirred for 10 h at a stirring speed of 100 r / min, and spray dried.

[0031] The preparation method of the low-density anti-aging HIPS material includes the following steps:

[0032] S1, high impact polystyrene, recycled polyvinyl chloride, E51 epoxy resin, nano zinc oxide, light stabilizer 944, foaming agent, nano calcium carbonate, mica powder, antioxidant 1010, maleic anhydride grafted polystyrene, and ethylene bis stearyl amide are mixed at a speed of 50 r / min for 1 min to obtain a premix;

[0033] S2, the premix is put into a double screw extruder for extrusion, the length-diameter ratio of the screw is 1:20, the temperature of each zone of the double screw extruder is as follows: 175℃ for the first zone, 185℃ for the second zone, 195℃ for the third zone, 200℃ for the fourth zone, 200℃ for the fifth zone, 210℃ for the sixth zone, 210℃ for the seventh zone, 210℃ for the eighth zone, 210℃ for the ninth zone, and 195℃ for the die head, then extruded into a molding die, pressure maintained for 1 min, and then taken out after the die is cooled.

[0034] Example 2 A low-density anti-aging HIPS material, the raw materials of which include: high impact polystyrene 1000 g, recycled polyvinyl chloride 300 g, E51 epoxy resin 50 g, nano zinc oxide 50 g, light stabilizer 944 50 g, foaming agent 100 g, nano calcium carbonate 35 g, mica powder 15 g, antioxidant 1010 20 g, maleic anhydride grafted polystyrene 1.2 g, and ethylene bis stearyl amide 20 g.

[0035] The foaming agent is composed of AC foaming agent, activated silicon dioxide, nano lanthanum oxide, dicumyl peroxide, and polyetheramine D230 in a mass ratio of 5:2:2:0.5:0.1. The activated silicon dioxide is prepared by the following steps: 150 g of nano silicon dioxide, 30 g of carboxyl-terminated polyamide amine, 1 g of p-toluenesulfonic acid, and 600 g of water are added to a reaction kettle with a temperature of 95℃, stirred for 20 h at a stirring speed of 200 r / min, and spray dried.

[0036] The preparation method of the low-density anti-aging HIPS material includes the following steps:

[0037] S1, high impact polystyrene, recycled polyvinyl chloride, E51 epoxy resin, nano zinc oxide, light stabilizer 944, foaming agent, nano calcium carbonate, mica powder, antioxidant 1010, maleic anhydride grafted polystyrene, ethylene bis stearyl amide are mixed, stirring at 150 r / min for 3 min, to get premix;

[0038] S2, the premix is put into a double screw extruder and extruded, the length-diameter ratio of the screw is 1:24, the temperature of each zone of the double screw extruder is as follows: zone 1 182℃, zone 2 190℃, zone 3 200℃, zone 4 210℃, zone 5 210℃, zone 6 220℃, zone 7 220℃, zone 8 220℃, zone 9 220℃, head 198℃, then extruded into a molding die, pressure maintained for 2 min, and then taken out after the die is cooled.

[0039] Example 3 A low-density anti-aging HIPS material, the raw materials of which include: high impact polystyrene 700g, recycled polyvinyl chloride 250g, E51 epoxy resin 20g, nano zinc oxide 40g, light stabilizer 944 20g, foaming agent 90g, nano calcium carbonate 15g, mica powder 5g, antioxidant 1010 17g, maleic anhydride grafted polystyrene 2g, ethylene bis stearyl amide 13g.

[0040] The foaming agent is composed of AC foaming agent, activated silicon dioxide, nano lanthanum oxide, dicumyl peroxide, and polyether amine D230 in a mass ratio of 4:1.2:1.8:0.2:0.07. The activated silicon dioxide is prepared by the following steps: 110g of nano silicon dioxide, 25g of carboxyl-terminated polyamide amine, 1g of p-toluenesulfonic acid, and 400g of water are added to a reaction kettle with a temperature of 94℃ and stirred for 12h at a stirring speed of 180r / min, and then spray dried.

[0041] The preparation method of the low-density anti-aging HIPS material includes the following steps:

[0042] S1, high impact polystyrene, recycled polyvinyl chloride, E51 epoxy resin, nano zinc oxide, light stabilizer 944, foaming agent, nano calcium carbonate, mica powder, antioxidant 1010, maleic anhydride grafted polystyrene, ethylene bis stearyl amide are mixed, stirring at 80 r / min for 2.5 min, to get premix;

[0043] S2, the premix is put into a double screw extruder and extruded, the length-diameter ratio of the screw is 1:21, the temperature of each zone of the double screw extruder is as follows: zone 1 181℃, zone 2 187℃, zone 3 199℃, zone 4 202℃, zone 5 207℃, zone 6 212℃, zone 7 218℃, zone 8 213℃, zone 9 218℃, head 196℃, then extruded into a molding die, pressure maintained for 1.5 min, and then taken out after the die is cooled.

[0044] Example 4 A low-density anti-aging HIPS material, raw materials of which include: high impact polystyrene 900 g, recycled polyvinyl chloride 150 g, E51 epoxy resin 40 g, nano zinc oxide 20 g, light stabilizer 944 40 g, foaming agent 70 g, mica powder 40 g, antioxidant 1010 13 g, maleic anhydride grafted polystyrene 1.5 g, ethylene bis-stearamide 17 g.

[0045] The foaming agent is composed of AC foaming agent, activated silicon dioxide, nano lanthanum oxide, dicumyl peroxide, and polyetheramine D230 in a mass ratio of 2:1.8:1.2:0.4:0.03. The activated silicon dioxide is prepared by the following steps: 130 g of nano silicon dioxide, 15 g of carboxyl-terminated polyamide amine, 1 g of p-toluenesulfonic acid, and 500 g of water are added to a reaction kettle with a temperature of 92°C, stirred at a speed of 120 r / min for 18 h, and spray dried.

[0046] The preparation method of the low-density anti-aging HIPS material includes the following steps:

[0047] S1, high impact polystyrene, recycled polyvinyl chloride, E51 epoxy resin, nano zinc oxide, light stabilizer 944, foaming agent, mica powder, antioxidant 1010, maleic anhydride grafted polystyrene, and ethylene bis-stearamide are mixed, stirred at a speed of 120 r / min for 1.5 min, and a premix is obtained;

[0048] S2, the premix is put into a double-screw extruder, the length-diameter ratio of the screw is 1:23, the temperature of each zone of the double-screw extruder is as follows: zone 1 178°C, zone 2 189°C, zone 3 196°C, zone 4 208°C, zone 5 203°C, zone 6 218°C, zone 7 212°C, zone 8 217°C, zone 9 212°C, and the die head 197°C, then extruded into a molding die, pressure maintained for 1.5 min, and then taken out after the mold is cooled.

[0049] Example 5 A low-density anti-aging HIPS material, raw materials of which include: high impact polystyrene 800 g, recycled polyvinyl chloride 200 g, E51 epoxy resin 30 g, nano zinc oxide 30 g, light stabilizer 944 30 g, foaming agent 80 g, nano calcium carbonate 30 g, antioxidant 1010 15 g, maleic anhydride grafted polystyrene 1.5 g, and ethylene bis-stearamide 15 g.

[0050] The foaming agent is composed of AC foaming agent, activated silicon dioxide, nano lanthanum oxide, dicumyl peroxide, and polyetheramine D230 in a mass ratio of 3:1.5:1.5:0.3:0.05. The activated silicon dioxide is prepared by the following steps: 120 g of nano silicon dioxide, 20 g of carboxyl-terminated polyamide amine, 1 g of p-toluenesulfonic acid, and 450 g of water are added to a reaction kettle with a temperature of 93℃ and stirred for 15 h at a stirring speed of 150 r / min, and then spray dried.

[0051] The preparation method of the low-density anti-aging HIPS material includes the following steps:

[0052] S1, high impact polystyrene, recycled polyvinyl chloride, E51 epoxy resin, nano zinc oxide, light stabilizer 944, foaming agent, nano calcium carbonate, antioxidant 1010, maleic anhydride grafted polystyrene, and ethylene bis-stearamide are mixed at a speed of 100 r / min for 2 min to obtain a premix;

[0053] S2, the premix is put into a double-screw extruder, the length-diameter ratio of the screw is 1:22, the temperature of each zone of the double-screw extruder is as follows: zone 1 180℃, zone 2 188℃, zone 3 198℃, zone 4 205℃, zone 5 205℃, zone 6 215℃, zone 7 215℃, zone 8 215℃, zone 9 215℃, and the die head 196℃, then extruded into a molding die, and pressure maintained for 1.5 min, then taken out after the die is cooled.

[0054] Comparative Example 1

[0055] A low-density anti-aging HIPS material, the raw materials of which include: high impact polystyrene 800 g, recycled polyvinyl chloride 230 g, nano zinc oxide 30 g, light stabilizer 944 30 g, foaming agent 80 g, nano calcium carbonate 30 g, antioxidant 1010 15 g, maleic anhydride grafted polystyrene 1.5 g, and ethylene bis-stearamide 15 g.

[0056] The foaming agent is composed of AC foaming agent, activated silicon dioxide, nano lanthanum oxide, dicumyl peroxide, and polyetheramine D230 in a mass ratio of 3:1.5:1.5:0.3:0.05. The activated silicon dioxide is prepared by the following steps: 120 g of nano silicon dioxide, 20 g of carboxyl-terminated polyamide amine, 1 g of p-toluenesulfonic acid, and 450 g of water are added to a reaction kettle with a temperature of 93℃ and stirred for 15 h at a stirring speed of 150 r / min, and then spray dried.

[0057] The preparation method of the low-density anti-aging HIPS material includes the following steps:

[0058] S1, high impact polystyrene, recycled polyvinyl chloride, nano zinc oxide, light stabilizer 944, foaming agent, nano calcium carbonate, antioxidant 1010, maleic anhydride grafted polystyrene, ethylene bis stearyl amide are mixed, stirring at 100 r / min for 2 min, to get premix;

[0059] S2, the premix is put into a double screw extruder, the screw length-diameter ratio is 1:22, the temperature of each zone of the double screw extruder is as follows: zone 1 180℃, zone 2 188℃, zone 3 198℃, zone 4 205℃, zone 5 205℃, zone 6 215℃, zone 7 215℃, zone 8 215℃, zone 9 215℃, head 196℃, then extruded into a molding die, pressure maintaining 1.5 min, then take out after the die is cooled.

[0060] Comparative example 2

[0061] A low-density anti-aging HIPS material, the raw materials of which include: high impact polystyrene 800g, recycled polyvinyl chloride 200g, E51 epoxy resin 30g, nano zinc oxide 30g, light stabilizer 944 30g, foaming agent 80g, nano calcium carbonate 30g, antioxidant 1010 15g, maleic anhydride grafted polystyrene 1.5g, ethylene bis stearyl amide 15g.

[0062] The foaming agent is composed of AC foaming agent, silicon dioxide, carboxyl-terminated polyamide amine, nano lanthanum oxide, dicumyl peroxide, and polyether amine D230, with a mass ratio of 3:1.286:0.214:1.5:0.3:0.05.

[0063] The preparation method of the above low-density anti-aging HIPS material, comprising the following steps:

[0064] S1, high impact polystyrene, recycled polyvinyl chloride, E51 epoxy resin, nano zinc oxide, light stabilizer 944, foaming agent, nano calcium carbonate, antioxidant 1010, maleic anhydride grafted polystyrene, ethylene bis stearyl amide are mixed, stirring at 100 r / min for 2 min, to get premix;

[0065] S2, the premix is put into a double screw extruder, the screw length-diameter ratio is 1:22, the temperature of each zone of the double screw extruder is as follows: zone 1 180℃, zone 2 188℃, zone 3 198℃, zone 4 205℃, zone 5 205℃, zone 6 215℃, zone 7 215℃, zone 8 215℃, zone 9 215℃, head 196℃, then extruded into a molding die, pressure maintaining 1.5 min, then take out after the die is cooled.

[0066] The density of the HIPS material obtained in Example 5 and Comparative Examples 1-2 is determined according to GBT 6343-2009 "Determination of apparent density of foamed plastics and rubbers".

[0067] As shown in Table 5, the HIPS material obtained in Example 5 has the smallest density, which is better than that of Comparative Examples 1-2 (P<0.05). Figure 1

[0068] The tensile strength of the HIPS materials obtained in Example 5 and Comparative Examples 1-2 was determined according to GB / T 1040.2-2022 “Determination of tensile properties of plastics - Part 2: test conditions for moulded and extruded plastics”. The Izod impact strength of the HIPS materials obtained in Example 5 and Comparative Examples 1-2 was determined according to ASTM D256-10.

[0069] As shown in Table 6, the HIPS material obtained in Example 5 has the highest tensile strength and impact strength, which is better than that of Comparative Examples 1-2 (P<0.05). Figure 2

[0070] The HIPS materials obtained in Example 5 and Comparative Examples 1-2 were irradiated under the same power ultraviolet lamp for 2500 h, and then the tensile strength and impact strength of the HIPS materials obtained in Example 5 and Comparative Examples 1-2 were determined again according to GB / T 1040.2-2022 “Determination of tensile properties of plastics - Part 2: test conditions for moulded and extruded plastics” and GB / T 1043.1-2008 “Determination of Izod impact properties of plastics - Part 1: non instrumented Izod impact test”. The tensile strength retention rate and impact strength retention rate of each group of samples were calculated.

[0071] As shown in Table 7, the HIPS material obtained in Example 5 has the highest tensile strength retention rate and impact strength retention rate, which is better than that of Comparative Examples 1-2 (P<0.05). Figure 3

[0072] ​​​The reason for the above results is that the application uses HIPS as a base material, and uses regenerated polyvinyl chloride and HIPS, which can effectively delay photo-oxidation reaction, and E51 epoxy resin forms a dense protective layer through cross-linking and curing, and further cooperates with nano zinc oxide and hindered amine light stabilizer, so that the anti-aging performance is synergistically improved, the outdoor service life is long, and the mechanical properties are excellent. The foaming agent of the application uses AC foaming agent, activated silicon dioxide and nano lanthanum oxide, which not only has good foaming effect in the system, but also ensures low density of the product, and the dicumyl peroxide is decomposed in the extruder to initiate cross-linking of the PVC segment to form rigid cell wall, and the polyetheramine D230 builds a flexible cross-linking network through ring-opening reaction of the epoxy group to offset the increase in brittleness caused by cross-linking, and the AC is decomposed to release gas, which is limited by the cross-linking network to restrict the growth of the cell, and the nano lanthanum oxide can form nucleation points in the melt to effectively control the cell size and significantly improve the cell wall tensile strength; and in the nano activated silicon dioxide, the dendritic macromolecules grafted on the surface can be cured with epoxy resin, and the interaction between molecular chains is enhanced, so that the molecular chains are difficult to slide when subjected to external tensile force, and the interfacial bonding force of the cell wall is further effectively improved, and the tensile strength of the product is improved.

[0073] The above is only a preferred specific embodiment of the application, but the protection scope of the application is not limited thereto, and any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the application within the technical range disclosed by the application, which should be covered within the protection scope of the application.

Claims

1. A low density, anti-aging HIPS material, characterized in that, The raw materials include, by mass fraction: high impact polystyrene 50-100 parts, recycled polyvinyl chloride 10-30 parts, epoxy resin 1-5 parts, nano zinc oxide 1-5 parts, hindered amine light stabilizer 1-5 parts, foaming agent 5-10 parts, filler 1-5 parts, antioxidant 1-2 parts, compatibilizer 1-2 parts, and processing aid 1-2 parts; The model of the epoxy resin is E51; The foaming agent includes AC foaming agent, activated silica, nano lanthanum oxide, dicumyl peroxide, and polyetheramine D230; the activated silica is silica grafted with carboxyl-terminated polyamide amine; The mass ratio of the AC foaming agent, activated silica, nano lanthanum oxide, dicumyl peroxide, and polyetheramine D230 is 1-5:1-2:1-2:0.1-0.5:0.01-0.1; The activated silica is prepared by the following steps: stirring nano silica, carboxyl-terminated polyamide amine, catalyst, and water for 10-20 hours at a stirring temperature of 90-95°C, and spray drying; the mass ratio of the nano silica and carboxyl-terminated polyamide amine is 10-15:1-3.

2. The low density, age resistant HIPS material of claim 1 wherein, The filler is nano calcium carbonate or / and mica powder.

3. The low density, age resistant HIPS material of claim 1 wherein, The antioxidant is a multi-hindered phenolic antioxidant.

4. The low density, age resistant HIPS material of claim 1 wherein, The compatibilizer is maleic anhydride grafted polystyrene, and the processing aid is a stearic amide lubricant.

5. A process for the preparation of a low density, weather resistant HIPS material according to any one of claims 1 to 4, characterized in that, The method includes the following steps: S1, mixing high impact polystyrene, recycled polyvinyl chloride, epoxy resin, nano zinc oxide, hindered amine light stabilizer, foaming agent, filler, antioxidant, compatibilizer, and processing aid to obtain a premix; S2, extruding the premix and then extruding it into a molding die, maintaining pressure for 1-2 minutes, and taking it out after the die cools.

6. Use of the low-density anti-aging HIPS material of any one of claims 1-4 as an outdoor protective material.

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