High-impact polystyrene material as well as preparation method and application thereof

Abstract

The invention relates to a high-impact polystyrene material as well as a preparation method and application thereof. The high-impact polystyrene material comprises the following components in parts by weight: 70-80 parts of EPS recycled resin, 5-10 parts of EPE recycled resin, 10-20 parts of an elastomer toughening agent, 2-5 parts of modified calcium carbonate, 0.5-2 parts of an acrylate interface compatibilizer and 0.7-2 parts of an auxiliary agent. Compared with the prior art, a large amount of EPS and EPE waste foam can be recycled, the method is environmentally friendly, and the obtained high-impact polystyrene material is excellent in comprehensive performance.

Description

Technical Field

[0001] The invention relates to the technical field of resin compositions, and in particular to a high-impact polystyrene material and a preparation method and application thereof. Background Art

[0002] Expanded polystyrene plastic (EPS) materials have the characteristics of light weight, heat preservation, shock absorption, sound insulation, and easy molding. They are widely used in product packaging, food packaging, building materials, fast food tableware and other fields. Packaging and tableware are mostly disposable products. A large amount of discarded EPS is difficult to degrade naturally, and due to its large size and difficulty in transportation, it is usually abandoned in the environment after consumption, causing "white pollution" and waste of resources. It is reported that the annual demand for polystyrene in China has exceeded 10 million tons, and the demand for EPS has exceeded 2 million tons. Due to its light weight and low strength, discarded EPS foam is more likely to migrate and decompose into microplastics in the environment, which is very harmful to the entire ecological environment. Therefore, the recycling of EPS foam has important environmental significance and economic value.

[0003] Pearl cotton material is expanded polyethylene material, referred to as EPE material, which is a foam material based on high-pressure LDPE and is widely used in the packaging field. Although EPE is easy to recycle, the current recycling rate is generally not high. The effect of continuing to foam after recycling EPE is often worse. A large amount of EPE pearl cotton is discarded, landfilled or incinerated, resulting in waste of resources and environmental pollution.

[0004] Based on EPS as the main body, the existing technology mainly uses styrene thermoplastic elastomers to toughen and obtain impact-grade polystyrene. However, EPS recycled materials often have low molecular weight and high melt index, resulting in low toughening efficiency of the material. Patent CN101070413A discloses the use of elastomers, polyethylene, and styrene-based compatibilizers to toughen waste polystyrene. This method has a certain compatibilization effect, but the toughening effect of styrene-based thermoplastic elastomers on styrene itself is greater than the compatibilization effect. The addition of a small amount of styrene-based thermoplastic elastomer has limited improvement on impact performance. In addition, this method uses a large amount of polyolefin elastomer (POE), and the tensile and flexural strengths of the material are both low. Summary of the invention

[0005] The purpose of the present invention is to provide a high-impact polystyrene material and a preparation method and application thereof, which can recycle a large amount of EPS and EPE waste foam, is environmentally friendly, and the obtained high-impact polystyrene material has excellent comprehensive performance.

[0006] The purpose of the present invention can be achieved by the following technical scheme: a high-impact polystyrene material, comprising the following components in parts by weight: 70-80 parts of EPS recycled resin, 5-10 parts of EPE recycled resin, 10-20 parts of elastomer toughening agent, 2-5 parts of modified calcium carbonate, 0.5-2 parts of acrylic interface compatibilizer, and 0.7-2 parts of auxiliary agent.

[0007] Preferably, the EPS recycled resin is a hot melt physical recycled resin with a melt index of 10-25 g / 10 min (200° C.*5 kg).

[0008] Further preferably, the specific recycling method of the EPS recycled resin is to crush the EPS hot melt material, remove impurities, homogenize and then remove impurities, and screw extrude and granulate.

[0009] Preferably, the EPE recycled resin is foaming grade EPE with a melt index of 0.5-3 g / 10 min (190° C.*2.16 kg).

[0010] Further preferably, the EPE recycled resin is obtained by hot melting, crushing, impurity removal, homogenization and impurity removal, and screw extrusion granulation of foaming-grade LDPE.

[0011] Preferably, the modified calcium carbonate is nano-scale and is modified by coating with stearic acid, that is, the modified calcium carbonate is nano-scale calcium carbonate coated with stearic acid.

[0012] Preferably, the elastomeric toughening agent comprises a styrene-based thermoplastic elastomer.

[0013] Preferably, the elastomer toughening agent is a composite of a styrene thermoplastic elastomer and a polyolefin thermoplastic elastomer. Since the styrene elastomer can provide a styrene base, it has a higher compatibility with the EPS substrate, and the addition of the elasticity of the polyolefin elastomer can provide more soft chains to improve the impact resistance of the material.

[0014] Further preferably, the mass ratio of the styrene thermoplastic elastomer to the polyolefin thermoplastic elastomer in the composite is (2-4): 1, preferably 3: 1. The two in the composite are preferably compounded at a mass ratio of styrene thermoplastic elastomer / polyolefin thermoplastic elastomer = 3: 1, and the compounding method is mechanical physical mixing. At this ratio, the addition of a composite elastomer toughening agent in an appropriate ratio can more effectively improve the impact performance of the EPS material.

[0015] Further preferably, the styrene-based thermoplastic elastomer includes one or more of styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer, styrene-hexene-butylene-styrene block copolymer and styrene-ethylene-propylene-styrene block copolymer.

[0016] Further preferably, the polyolefin-based thermoplastic elastomer includes one or both of ethylene-α-olefin random copolymer (POE) and ethylene-α-olefin block copolymer (OBC).

[0017] Preferably, the acrylic interfacial compatibilizer is a mixture of methyl acrylate-butadiene-styrene (MBS) and a vinyl copolymer.

[0018] Further preferably, the vinyl copolymer includes one or more of ethylene-methyl acrylate copolymer (EMA), ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA), ethylene-ethyl acrylate copolymer (EEA), ethylene-methacrylic acid copolymer (EMAA), and ethylene-methyl methacrylate (EMMA).

[0019] Preferably, the high impact polystyrene material comprises the following components in parts by weight: 70-80 parts of EPS recycled resin, 5-10 parts of EPE recycled resin, 10-20 parts of elastomer toughening agent, 2-5 parts of modified calcium carbonate, 0.5-2 parts of acrylic interface compatibilizer, 0.5-1.0 parts of light stabilizer, 0.1-0.5 parts of antioxidant and 0.1-0.5 parts of lubricant.

[0020] Further preferably, the high impact polystyrene material comprises the following components in parts by weight: 75 parts of EPS recycled resin, 10 parts of EPE recycled resin, 15 parts of elastomer toughening agent, 3 parts of modified calcium carbonate, 1 part of acrylic interface compatibilizer, 0.8 parts of light stabilizer, 0.4 parts of antioxidant, and 0.3 parts of lubricant.

[0021] More preferably, the light stabilizer is one or both of a hindered amine light stabilizer and an ultraviolet absorber.

[0022] More preferably, the hindered amine light stabilizer includes piperidine derivatives, imidazolone derivatives or azacycloalkanone derivatives.

[0023] More preferably, the ultraviolet absorber includes salicylate, benzophenone, benzotriazole or substituted acrylonitrile ultraviolet absorbers.

[0024] Preferably, the hindered amine light stabilizer is a piperidine derivative, and the ultraviolet absorber is a benzotriazole.

[0025] More preferably, the light stabilizer is a mixed light stabilizer of a piperidine derivative and a benzotriazole ultraviolet absorber in a mass ratio of 1:2.

[0026] More preferably, the antioxidant is one or both of a hindered phenol antioxidant and a phosphite antioxidant.

[0027] More preferably, the hindered phenol antioxidant includes pentaerythritol tetrakis[β-(3,5-di-tert-butyl 4-hydroxyphenyl) propionate] or octadecyl propionate.

[0028] More preferably, the phosphite antioxidant includes triphenyl phosphate, tris(2,4-di-tert-butylphenyl)phosphite or pentaerythritol di(2,4-di-tert-butylphenyl)phosphite, preferably pentaerythritol di(2,4-di-tert-butylphenyl)phosphite.

[0029] More preferably, the antioxidant is a mixed antioxidant of a hindered phenol antioxidant and a phosphite antioxidant in a mass ratio of 1:1.

[0030] Further preferably, the lubricant includes one or more of fatty acid salts, fatty acid amides, silane polymers, solid paraffin, liquid paraffin, calcium stearate, zinc stearate, stearic acid amide, silicone powder, methylene bisstearic acid amide or N,N'-ethylene bisstearic acid amide.

[0031] More preferably, the lubricant includes one or more of silicone powder, methylene bisstearic acid amide or N,N'-ethylene bisstearic acid amide.

[0032] A method for preparing the above-mentioned high-impact polystyrene material comprises the following steps:

[0033] (1) drying the nano calcium carbonate and stirring it in a high-speed mixer, setting the temperature to 80-120° C. and the stirring speed to 2000-3000 r / min, adding 3-5 wt % of stearic acid, increasing the speed to 4000-5000 r / min, and continuing stirring for 15-25 min to obtain modified calcium carbonate;

[0034] (2) Weighing by weight: 70-80 parts of EPS recycled resin, 5-10 parts of EPE recycled resin, 10-20 parts of elastomer toughening agent, 2-5 parts of modified calcium carbonate, 0.5-2 parts of acrylic interfacial compatibilizer, and 0.7-2 parts of auxiliary agent;

[0035] (3) adding the components in step (2) according to the above weight parts into a high-speed mixer, mixing them thoroughly, and then placing them in a screw machine, controlling the screw machine speed to 300-500 rpm, the temperature to 180-210° C., extruding and granulating, and preparing the high-impact polystyrene material.

[0036] Preferably, in step (1), the nano calcium carbonate is dried by forced air at 110-130° C. for 5-7 hours.

[0037] Further preferably, in step (1), the nano-calcium carbonate is dried by forced air at 120° C. for 6 hours.

[0038] Preferably, the nano calcium carbonate particle size in step (1) is 1-100 nm.

[0039] Preferably, in step (1), 4 wt % (i.e., the mass ratio of stearic acid to nano-calcium carbonate is 4:100) of stearic acid is added, the rotation speed is increased to 4000-5000 r / min, and stirring is continued for 20 min to obtain modified calcium carbonate.

[0040] An application of the high-impact polystyrene material is to use the high-impact polystyrene material in office supplies or electronic appliance housings.

[0041] Preferably, the high impact polystyrene material is used for a printer housing, a coffee machine housing or a keyboard.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] 1. The present invention provides a high-impact polystyrene material modified based on recycled pearl cotton EPE and EPS foam and a preparation method thereof, which can recycle a large amount of EPS and EPE waste foam, is environmentally friendly, and the obtained high-impact polystyrene material has excellent comprehensive performance, and its IZOD notched impact strength can reach more than 130 J / m.

[0044] 2. The present invention achieves the toughening effect of rigid inorganic particles by adding modified nano-calcium carbonate, and the impact resistance of the material is significantly improved.

[0045] 3. The compatibility of EPS and EPE foam recycled materials themselves is not good. The use of acrylic interfacial compatibilizers to provide butadiene and polyethylene segments improves the compatibility of EPE recycled resin and styrene elastomer toughening agents. In addition, the acrylic ester component of the acrylic interfacial compatibilizer improves the compatibility of the base resin and modified calcium carbonate, promotes the dispersion of modified calcium carbonate, and exerts a good synergistic toughening effect.

[0046] 4. The present invention adopts styrene thermoplastic elastomer and polyolefin thermoplastic elastomer for composite toughening. The molecular chain segment of the composite thermoplastic elastomer contains styrene group, which has good compatibility with EPS chain segment, and also contains polyolefin soft segment, which improves the impact performance of the material. The composite of polyolefin elastomer in appropriate proportion is also beneficial to the toughening of EPE recycled resin.

[0047] 5. The present invention adopts a compound of a thermoplastic elastomer toughening agent and a light stabilizer. The thermoplastic elastomer molecular chain segment does not contain unsaturated double bonds and has excellent weather resistance and heat aging resistance. The compound with the light stabilizer improves the anti-ultraviolet performance of the material. DETAILED DESCRIPTION

[0048] The embodiments of the present invention are described in detail below. The following embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments.

[0049] The raw materials used in the following examples and comparative examples include:

[0050] Styrene-ethylene-butylene-styrene block copolymer (SEBS) adopts YH502 from Yueyang Petrochemical; ethylene-α-olefin random copolymer (POE) adopts 8100 from Dow Chemical; ethylene-α-olefin block copolymer (OBC) adopts 9100 from Dow Chemical; methyl acrylate-butadiene-styrene (MBS) adopts M732 from Zhongyuan; ethylene-methyl acrylate copolymer (EMA) adopts 24MA005 from Arkema; ​​ethylene-vinyl acetate copolymer (EVA) adopts 7340M from Formosa Plastics; ethylene-ethyl acrylate copolymer (EEA) adopts 2116 from DuPont; polyethylene grafted polystyrene (PE-g-PS) adopts BP231 from Jiayirong; bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate adopts Tinuvin 770 from BASF.

[0051] Embodiment 1-11:

[0052] A method for preparing a high-impact polystyrene material based on EPS foam and EPE foam modification, the method comprising the following steps:

[0053] According to the weight proportions of the ingredients of Examples 1-11 in Table 1, the raw materials were added to a high-speed mixer and mixed thoroughly, and then placed in a screw machine, and the speed of the screw machine was controlled to be 300-500 rpm, and the temperature was 180-210° C. In the following examples, the specific speed was 400 rpm, and the temperatures of the screw sections were 180° C., 180° C., 185° C., 190° C., 195° C., 195° C., 195° C., 200° C., and 210° C. Extrusion granulation was performed to obtain modified particles.

[0054] Among them, the material composition of Table 1 is as follows:

[0055] The component EPS recycled resin is recycled by hot melt physical method, with a melt index of 14g / 10min (200℃*5kg), and is obtained by hot melt recycling of waste packaging foam.

[0056] The component EPE recycled resin has a melt index of 0.8g / 10min (190℃*2.16kg) and is recovered from LDPE 2426H foaming grade LDPE pearl cotton.

[0057] The component elastomeric toughening agent of Example 1 is styrene-ethylene-butylene-styrene block copolymer (SEBS), the component elastomeric toughening agent of Examples 2, 3, 7, 8, 9, 10, and 11 is a compound of styrene-ethylene-butylene-styrene block copolymer (SEBS) and ethylene-α-olefin random copolymer (POE) mixed in a mass ratio of 3:1, the component elastomeric toughening agent of Example 4 is a compound of SEBS and POE mixed in a mass ratio of 2:1, the component elastomeric toughening agent of Example 5 is a compound of SEBS and POE mixed in a mass ratio of 4:1, and the component elastomeric toughening agent of Example 6 is a compound of SEBS and ethylene-α-olefin block copolymer (OBC) mixed in a mass ratio of 3:1.

[0058] The preparation method of the modified calcium carbonate of the component is: drying the nano calcium carbonate by air blast at 120° C. for 6 hours, then stirring in a high-speed mixer, setting the temperature to 90° C. and the stirring rate to 2500 r / min, adding 4wt% of stearic acid, increasing the speed to 4500 r / min, and continuing stirring for 20 minutes to obtain modified nano calcium carbonate.

[0059] The component acrylic interfacial compatibilizer of Examples 1, 2, 3, 4, 5, 6, 7, 10, and 11 is a mixture of methyl acrylate-butadiene-styrene (MBS) and ethylene-methyl acrylate copolymer (EMA) in a mass ratio of 2:1, the component acrylic interfacial compatibilizer of Example 8 is a mixture of MBS and ethylene-vinyl acetate copolymer (EVA) in a mass ratio of 2:1, and the component acrylic interfacial compatibilizer of Example 9 is a mixture of MBS and ethylene-ethyl acrylate copolymer (EEA) in a mass ratio of 2:1.

[0060] The component light stabilizer is a mixed light stabilizer of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate and 2-(2-hydroxy-5-tert-octylphenyl)benzotriazole in a mass ratio of 1:2;

[0061] The component antioxidant is a mixed antioxidant of octadecyl propionate and tri-(2,4-di-tert-butylphenyl) phosphite in a mass ratio of 1:1;

[0062] The component lubricant is ethylene bis stearamide.

[0063] Table 1 Example Masterbatch Formula

[0064]

[0065]

[0066] Comparative Examples 1-6:

[0067] A method for preparing a polystyrene material, the method comprising the following steps:

[0068] According to the weight parts of the ingredients of comparative examples 1-6 in Table 2, the raw materials were added into a high-speed mixer and mixed thoroughly, and then placed in a screw machine, and the speed of the screw machine was controlled to be 300-500 rpm, and the temperature was 180-210°C. In the following comparative examples, the specific speed selected was 400 rpm, and the temperatures of the screw sections were 180°C, 180°C, 185°C, 190°C, 195°C, 195°C, 195°C, 200°C, and 210°C. Extrusion granulation was performed to obtain modified particles.

[0069] Among them, the material composition of Table 2 is as follows:

[0070] The component EPS recycled resin is recycled by hot melt physical method, with a melt index of 14g / 10min (200℃*5kg), and is obtained by hot melt recycling of waste packaging foam.

[0071] The component EPE recycled resin has a melt index of 0.8g / 10min (190℃*2.16kg) and is recovered from LDPE 2426H foaming grade LDPE pearl cotton.

[0072] The component elastomer toughening agent of Comparative Examples 1, 2, 3 and 4 is a compound of styrene-ethylene-butylene-styrene block copolymer (SEBS) and ethylene-α-olefin random copolymer (POE) mixed in a mass ratio of 3:1.

[0073] The preparation method of the modified calcium carbonate of the components of Comparative Examples 2, 4, and 6 is as follows: the nano-calcium carbonate is dried by air blast at 120° C. for 6 h, then stirred in a high-speed mixer, the temperature is set to 90° C., the stirring rate is 2500 r / min, 4wt% of stearic acid is added, the speed is increased to 4500 r / min, and stirring is continued for 20 min to obtain modified nano-calcium carbonate.

[0074] The acrylic interfacial compatibilizer component of Comparative Examples 1 and 4 is a mixture of methyl acrylate-butadiene-styrene (MBS) and ethylene-methyl acrylate copolymer (EMA) in a mass ratio of 2:1, and the compatibilizer of Comparative Example 6 is polyethylene grafted polystyrene (PE-g-PS).

[0075] The new HIPS material of comparative example 5 is high impact polystyrene, which is commercially available and used in home appliance housings.

[0076] The component light stabilizer is a mixed light stabilizer of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate and 2-(2-hydroxy-5-tert-octylphenyl)benzotriazole in a mass ratio of 1:2.

[0077] The component antioxidant is a mixed antioxidant of octadecyl propionate and tri-(2,4-di-tert-butylphenyl) phosphite in a mass ratio of 1:1.

[0078] The component lubricant is ethylene bis stearamide.

[0079] Table 2 Comparative Example Masterbatch Formula

[0080]

[0081] Performance characterization:

[0082] The product performance of Examples 1 to 11 and Comparative Examples 1 to 6 was characterized, and the results are shown in Table 3:

[0083] Table 3 Performance characteristics of the products of the embodiments and comparative examples

[0084]

[0085]

[0086] Result analysis:

[0087] Combining Example 2 with Comparative Examples 1, 2, and 3, it can be seen that when the interface compatibilizer MBS / EMA and / or modified calcium carbonate are not added, the impact strength of the material is poor. When only modified calcium carbonate is added, the impact strength of the material is improved but to a limited extent. When only MBS / EMA is added, the material performance is similar to that of only calcium carbonate. When the interface compatibilizer and calcium carbonate are added at the same time, the impact performance of the material is greatly improved. This shows that MBS / EMA not only plays a role in toughening and promoting the compatibility of EPE recycled materials and the system, but also significantly improves the compatibility and dispersibility of calcium carbonate in the system, thereby improving the material performance.

[0088] Combining Example 2 and Comparative Example 4, it can be seen that the amount of EPE recycled material should not be too much.

[0089] The system of the present invention involves three substances, namely EPS, EPE, and stearic acid-modified calcium carbonate. The interfacial compatibilizer needs to have good compatibility with all three. Combining Example 2 and Comparative Example 6, it can be seen that the vinyl-butadiene-based and polar acrylate compatibilizer of the present invention can not only have a good compatibility effect, but also have a certain toughening effect, and its effect is better than the commonly used PS / PE system compatibilizer PE-g-PS.

[0090] As shown in Table 4, Example 2 is a solution with better comprehensive performance and economic cost, and Comparative Example 5 is a conventional HIPS on the market. It can be seen that the high-impact polystyrene material modified based on EPS recycled materials and EPE recycled materials has better material properties, and is also better than ordinary HIPS in terms of UV resistance, and has good application prospects. In addition, Example 2 contains more than 80% recycled materials, which has excellent environmental significance in solving the problem of white foam pollution, and at the same time turns waste into treasure, and has excellent economic efficiency.

[0091] Table 4 Test results of Example 2 and Comparative Example 5

[0092]

[0093]

[0094] Table 3-Table 4 are the performance test results, the specific items are as follows:

[0095] Izod impact strength: tested according to ASTM-D256 standard;

[0096] MI: Tested according to ASTM-D1238 standard;

[0097] Tensile strength: tested according to ASTM-D638 standard;

[0098] Bending strength: tested according to ASTM-D790 standard;

[0099] UV aging: tested according to ASTM-D4329 standard;

[0100] Color difference △E: tested according to ASTM-D2244 standard.

[0101] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A high impact polystyrene material, characterized in that: The invention comprises the following components in parts by weight: 70-80 parts of EPS recycled resin, 5-10 parts of EPE recycled resin, 10-20 parts of elastomer toughening agent, 2-5 parts of modified calcium carbonate, 0.5-2 parts of acrylic ester interface compatibilizer and 0.7-2 parts of auxiliary agent.

2. The high impact polystyrene material according to claim 1, characterized in that: The EPS recycled resin is a hot melt physical recycled resin, and under the conditions of 200°C and 5kg, the melt index is 10-25g / 10min; The EPE recycled resin is a foaming grade EPE, and under the conditions of 190° C. and 2.16 kg, the melt index is 0.5-3 g / 10 min.

3. The high impact polystyrene material according to claim 1, characterized in that: The modified calcium carbonate is nanometer-grade and is modified by coating with stearic acid.

4. The high impact polystyrene material according to claim 1, characterized in that: The elastomer toughening agent is a composite of styrene-based thermoplastic elastomer and polyolefin-based thermoplastic elastomer.

5. The high impact polystyrene material according to claim 4, characterized in that: The styrene-based thermoplastic elastomer includes one or more of styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer, styrene-hexene-butylene-styrene block copolymer and styrene-ethylene-propylene-styrene block copolymer; The polyolefin-based thermoplastic elastomer includes one or more of an ethylene-α-olefin random copolymer and an ethylene-α-olefin block copolymer.

6. The high impact polystyrene material according to claim 1, characterized in that: The acrylic interfacial compatibilizer is a mixture of methyl acrylate-butadiene-styrene and vinyl copolymer; The vinyl copolymer includes one or more of ethylene-methyl acrylate copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, and ethylene-methyl methacrylate.

7. The high impact polystyrene material according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 70-80 parts of EPS recycled resin, 5-10 parts of EPE recycled resin, 10-20 parts of elastomer toughening agent, 2-5 parts of modified calcium carbonate, 0.5-2 parts of acrylic interfacial compatibilizer, 0.5-1.0 parts of light stabilizer, 0.1-0.5 parts of antioxidant and 0.1-0.5 parts of lubricant; The light stabilizer is one or more of a hindered amine light stabilizer or an ultraviolet absorber; The antioxidant is one or more of a hindered phenol antioxidant or a phosphite antioxidant; The lubricant includes one or more of fatty acid salts, fatty acid amides, silane polymers, solid paraffin, liquid paraffin, calcium stearate, zinc stearate, stearic acid amide, silicone powder, methylene bis stearic acid amide or N,N'-ethylene bis stearic acid amide.

8. The high impact polystyrene material according to claim 7, characterized in that: The hindered amine light stabilizer includes piperidine derivatives, imidazolone derivatives or azacycloalkanone derivatives; The ultraviolet absorber includes salicylate, benzophenone, benzotriazole or substituted acrylonitrile ultraviolet absorbers; The hindered phenol antioxidant includes pentaerythritol tetrakis[β-(3,5-di-tert-butyl 4-hydroxyphenyl) propionate] or octadecyl propionate; The phosphite antioxidant includes triphenyl phosphate, tris(2,4-di-tert-butylphenyl)phosphite or pentaerythritol di(2,4-di-tert-butylphenyl) bisphosphite.

9. A method for preparing the high impact polystyrene material according to any one of claims 1 to 8, characterized in that: The following steps are involved: (1) drying the nano calcium carbonate and stirring it in a high-speed mixer, setting the temperature to 80-120° C. and the stirring speed to 2000-3000 r / min, adding 3-5 wt % of stearic acid, increasing the speed to 4000-5000 r / min, and continuing stirring for 15-25 min to obtain modified calcium carbonate; (2) Weighing by weight: 70-80 parts of EPS recycled resin, 5-10 parts of EPE recycled resin, 10-20 parts of elastomer toughening agent, 2-5 parts of modified calcium carbonate, 0.5-2 parts of acrylic interfacial compatibilizer, and 0.7-2 parts of auxiliary agent; (3) adding the components in step (2) according to the above weight parts into a high-speed mixer, mixing them thoroughly, and then placing them in a screw machine, controlling the screw machine speed to 300-500 rpm, the temperature to 180-210° C., extruding and granulating, and preparing the high-impact polystyrene material.

10. An application of the high impact polystyrene material according to any one of claims 1 to 8, characterized in that: The high-impact polystyrene material is used for office supplies or electronic appliance housings.

Images