High-toughness anti-stamping plastic and preparation process thereof

Abstract

The invention relates to the technical field of plastics, and discloses a high-toughness anti-stamping plastic and a preparation process thereof.The plastic is prepared from polypropylene, polyethylene, a compatilizer, a functional additive, an antioxidant, a lubricant and a plasticiser, the functional additive is a sepiolite fiber derivative with the surface coated with a nitrogen-phosphorus-silicon ternary synergistic flame retardant, and the functional additive is a polypropylene fiber derivative with the surface coated with a nitrogen-phosphorus-silicon ternary synergistic flame retardant. The functional additive has a branched structure, carboxyl groups on branched chains can interact with a compatilizer in a matrix in the subsequent melt extrusion process, and an extended branched molecular chain can extend into each area of a matrix material to form a mutually entangled network structure with the matrix, so that the functional additive has the advantages of high mechanical strength, high mechanical strength and high mechanical strength. The prepared plastic has good toughness, compression resistance, impact resistance and flame retardance, the durability of the plastic is improved, the service life of the plastic is effectively prolonged, the prepared plastic has higher use safety, and the application effect of the plastic in various fields is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastics, and in particular to a high-toughness anti-punching plastic and a preparation process thereof. Background Art

[0002] With the rapid development of society and science and technology, polymer products have become inseparable from daily life, such as plastic storage cabinets, plastic trays and other plastic products. Plastics are mainly prepared by processing polymers such as resins. Among the many plastic substrates, polypropylene (PP) and polyethylene (PE) are both crystalline thermoplastic resins, both of which have the advantages of light weight, low price, easy processing, good electrical insulation performance, etc. The PP / PE composite plastic made by blending effectively improves the shortcomings of a single material in mechanical properties and heat resistance.

[0003] With the development of modern industry, higher requirements are placed on the functionality of plastics. However, the mechanical properties of ordinary PP / PE composite plastics are poor, especially in terms of toughness and stamping resistance. When plastic products are subjected to physical impact, due to their insufficient toughness, microcracks may appear in the material and gradually expand during long-term use, which may eventually lead to material fracture and damage, greatly limiting its wider application in plastic storage cabinets, plastic trays and other plastic products. In addition, since PP and PE themselves have a low oxygen index, they are extremely easy to burn, and they release a lot of heat and molten droplets when burning. The flame propagates quickly and is not easy to extinguish, which seriously threatens people's life and property safety, limiting the application of composite plastics in fire-proof and flame-resistant materials.

[0004] In the prior art, the improvement of the performance of PP / PE composite plastics is often achieved by optimizing the basic formula. For example, the invention patent with the announcement number CN114410010B discloses a flame-retardant polypropylene material and a preparation method thereof. The invention uses modified magnesium hydroxide without organic halogen as a halogen-free flame retardant and a specific flame retardant synergist as a flame retardant system, which is more non-toxic and environmentally friendly, and can achieve a synergistic and excellent flame retardant effect. The halogen-free flame retardant is magnesium hydroxide coated with a silane coupling agent, and the flame retardant synergist is a mixture of melamine hydrobromide and aluminum hypophosphite. It also has the effect of carbon dioxide adsorption. The prepared polypropylene material has a moderate density and good mechanical properties, and can be applied to a variety of applications. Therefore, high-performance PP / PE composite plastics can be prepared by adding optimized components in a targeted manner during the preparation of PP / PE composite plastics. Summary of the invention

[0005] In order to solve the problems mentioned in the background technology, the purpose of the present invention is to provide a high-toughness and anti-punching plastic and a preparation process.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A preparation process of a high-toughness and anti-impact plastic, the plastic comprising the following raw materials in parts by weight: 30 to 50 parts of polypropylene, 20 to 40 parts of polyethylene, 5 to 9 parts of a compatibilizer, 4 to 8 parts of a functional additive, 0.5 to 1.5 parts of an antioxidant, 1 to 2 parts of a lubricant, and 1 to 3 parts of a plasticizer;

[0008] The preparation process comprises the following steps:

[0009] (1) adding polypropylene, polyethylene, compatibilizer, functional additive, antioxidant, lubricant and plasticizer into a mixer, setting the stirring rate to 600-1000 r / min, mixing for 30-50 min, discharging the material to obtain a premix;

[0010] (2) The premix is ​​passed through a feeder and into a twin-screw extruder for melt extrusion to obtain plastic.

[0011] Furthermore, the preparation method of the functional additive comprises the following steps:

[0012] S1: ultrasonically dispersing sepiolite fiber in N-methylpyrrolidone to form a uniform dispersion, adding diallylcarbamoyl chloride and an acid binding agent to the dispersion, stirring at room temperature for 4 to 6 hours, filtering, collecting the product, and drying to obtain modified sepiolite fiber;

[0013] S2: Add the modified sepiolite fiber to dimethyl sulfoxide, ultrasonically disperse for 20 to 30 minutes, pass nitrogen, exhaust the air, add the flame retardant modification component and the platinum catalyst, and after the addition, raise the system temperature to 70 to 90°C under stirring conditions, keep warm for 3 to 7 hours, centrifuge and separate the solid material, wash and dry it to obtain the functional additive.

[0014] Furthermore, in step S1, the acid binding agent is any one of pyridine or triethylamine.

[0015] Furthermore, in step S1, the mass ratio of the sepiolite fiber to diallylcarbamoyl chloride is 1:0.1-0.3.

[0016] Furthermore, in step S2, the platinum catalyst is an isopropanol solution of chloroplatinic acid.

[0017] Technical principle: In the functional additive, firstly, under the action of the acid-binding agent, the hydroxyl groups on the surface of the sepiolite fiber can react with the acyl chloride groups in the diallylcarbamoyl chloride structure, thereby introducing unsaturated olefinic functional groups on the surface of the sepiolite fiber to obtain modified sepiolite fiber; secondly, the unsaturated olefinic functional groups on the surface of the modified sepiolite fiber can react with the silicon-hydrogen bonds in the structure of the flame-retardant modified component under the action of a platinum catalyst to undergo a silylation reaction. Since the structure of the flame-retardant modified component contains multiple silicon-hydrogen bonds, the obtained functional additive has a dendritic branched structure.

[0018] Furthermore, the preparation method of the flame retardant modified component comprises the following steps:

[0019] SS1: Add 2-[(6-oxy-6H-diphenyl[c,e][1,2]oxaphosphorinane-6-yl)methyl]succinic acid to N,N-dimethylformamide, stir mechanically to make it uniform, add ethylene glycol diglycidyl ether and phase transfer catalyst under continuous nitrogen conditions, turn on heating after the addition is complete, control the temperature to 70-80°C, keep stirring for 4-8 hours, stop heating and remove nitrogen, cool to room temperature and then discharge to obtain a polymer intermediate;

[0020] SS2: Mix the polymeric intermediate with dimethyl sulfoxide, stir to form a uniform solution, then add dimethylchlorosilane and pyridine to the solution. After the addition, raise the temperature to 50-60°C, stir at this temperature for 4-7 hours, and remove the solvent by vacuum distillation to obtain a flame retardant modified component.

[0021] Furthermore, in step SS1, the phase transfer catalyst is any one of benzyltriethylammonium bromide, tetrabutylammonium bromide or tetrabutylammonium hydrogen sulfate.

[0022] Technical principle: In the flame retardant modified component, firstly, under the action of a phase transfer catalyst, the carboxyl group in the structure of 2-[(6-oxy-6H-diphenyl[c,e][1,2]oxyphosphorinane-6-yl)methyl]butanedioic acid can undergo continuous ring-opening reactions with the epoxy group in the structure of ethylene glycol diglycidyl ether, and by controlling the dosage ratio of 2-[(6-oxy-6H-diphenyl[c,e][1,2]oxyphosphorinane-6-yl)methyl]butanedioic acid and ethylene glycol diglycidyl ether, a polymeric intermediate containing two equivalents of carboxyl groups and multiple hydroxyl groups in the structure is obtained; secondly, the polymeric intermediate can react with Si-Cl in the structure of dimethylchlorosilane under the action of pyridine, thereby obtaining a flame retardant modified component containing multiple silicon-hydrogen bonds in the structure.

[0023] Furthermore, the antioxidant is any one of antioxidant 1010, antioxidant 168 or antioxidant 1076; the lubricant is any one of stearic acid, calcium stearate or zinc stearate; the plasticizer is any one of dibutyl phthalate, dioctyl phthalate or dioctyl sebacate.

[0024] Furthermore, in step (2), the set temperatures of each section in the twin-screw extruder are: the temperature of the first section is 165-175°C, the temperature of the second section is 175-185°C, the temperature of the third section is 185-195°C, and the temperature of the fourth section is 195-205°C; the extrusion temperature is 155-165°C; and the extrusion speed is 300-500r / min.

[0025] A high-toughness, anti-punching plastic is made by adopting the above preparation process.

[0026] Beneficial effects of the present invention:

[0027] (1) The present invention uses polypropylene and polyethylene as the base material of the plastic, and adds the prepared functional additives to the base material, so that the elongation at break of the prepared plastic can reach up to 195.8% and the impact strength can reach up to 28.7KJ / m 2 The limiting oxygen index is as high as 33.6%. It has good toughness, impact resistance and flame retardant properties, which improves the durability of plastics, extends the service life of plastics and broadens its application areas.

[0028] (2) The present invention prepares a functional additive as a filler modifier for plastics. Since the functional additive has a branched structure and the carboxyl groups on the branch chains can interact with the compatibilizer in the matrix during the subsequent melt extrusion process, the extended branched molecular chains can extend into various regions of the matrix material to form an intertwined network structure with the matrix. When the plastic material is subjected to pressure and impact, the intertwined network structure can buffer stress changes, deform and absorb impact energy, thereby improving the plastic's compressive and impact resistance. On the one hand, after being organically modified, the sepiolite fiber can be evenly dispersed in the matrix, avoiding the negative impact caused by the agglomeration of the sepiolite fiber. When the plastic material is impacted and cracks are generated, the functional additive can withstand the external load like a bridge and build bridges between the cracks to consume the external load to do work, thereby improving the toughness of the plastic. On the other hand, the nitrogen-phosphorus-silicon ternary synergistic flame retardant in the functional additive can effectively improve the flame retardant properties of the plastic, avoid the occurrence of fire, make the prepared plastic have higher safety, and effectively improve the application effect of plastics in various fields.

[0029] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 This is an infrared spectrum test chart of the flame retardant modified component prepared in Example 1 of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1

[0034] 1. Preparation of functional additives

[0035] S1: 5 g of sepiolite fiber was ultrasonically dispersed in N-methylpyrrolidone to form a uniform dispersion, 1.2 g of diallylcarbamoyl chloride and 0.05 g of pyridine were added to the dispersion, and after the addition, the dispersion was stirred at room temperature for 5 h, filtered, the product was collected, and dried to obtain modified sepiolite fiber;

[0036] S2: Add 5 g of modified sepiolite fiber to dimethyl sulfoxide, ultrasonically disperse for 25 min, pass nitrogen, and after exhausting the air, add 2.6 g of flame retardant modified component and 0.1 g of 2% mass fraction of isopropanol solution of chloroplatinic acid. After the addition is completed, raise the system temperature to 80°C under stirring conditions, keep warm for 5 h, centrifuge and separate the solid material, wash and dry it to obtain a functional additive.

[0037] The unsaturated value of modified sepiolite fiber and functional additives was tested by titration. 0.5 g of modified sepiolite fiber was used as the test sample, and it was ultrasonically dispersed in 150 ml of chloroform. 20 ml of Wei's solution was added, mixed, and placed in a cool place for 1 hour. 10 ml of 15% potassium iodide solution and 100 ml of purified water were added, stirred, and the dispersion was titrated with 0.1 M sodium thiosulfate as the standard solution. The titration was stopped after the dispersion changed color, and 1 ml of 1% starch was added as an indicator, and the titration was continued. Until the color no longer changes, record the consumption of standard solution V (ml), do a blank experiment at the same time, and record the consumed volume of standard solution V1 (ml), calculate the unsaturation value of the sample according to the formula [(V1-V) / 0.5]×0.1, and the measured result is 2.836mmol / g; the same as the above steps, test the unsaturation value of 0.5g functional additives again, and the measured result is 0.102mmol / g, because the flame retardant modified component and the modified sepiolite fiber undergo a silylation reaction, resulting in a decrease in the unsaturation value.

[0038] 2. Preparation of flame retardant modified components

[0039] SS1: Add 5 g of 2-[(6-oxy-6H-diphenyl[c,e][1,2]oxaphosphorinane-6-yl)methyl]butanedioic acid to N,N-dimethylformamide, stir mechanically to make it uniform, add 2.1 g of ethylene glycol diglycidyl ether and 0.08 g of tetrabutylammonium bromide under continuous nitrogen conditions, turn on the heating after the addition is completed, control the temperature to 75°C, keep the temperature and stir for 6 hours, then stop heating and remove the nitrogen, cool to room temperature and discharge to obtain a polymer intermediate;

[0040] SS2: Mix 5 g of the polymeric intermediate with dimethyl sulfoxide, stir to form a uniform solution, then add 1.4 g of dimethylchlorosilane and 0.05 g of pyridine to the solution. After the addition, raise the temperature to 55°C, stir at this temperature for 5 hours, and remove the solvent by distillation under reduced pressure to obtain a flame retardant modified component.

[0041] The flame retardant modified components were analyzed by infrared spectroscopy using AVATAR-360 Fourier transform infrared spectrometer. Figure 1 As shown by Figure 1 It can be seen that in the infrared spectrum of the flame retardant modified component, 3041cm -1 The absorption peak of the carbon-hydrogen bond in the benzene ring appears at 1280cm -1 The absorption peak of P=O appears at 1760cm -1 The absorption peak of the ester group C=O appears at 1050cm -1 The absorption peak of ether bond appears at 1740cm -1 The absorption peak of the carboxyl group C=O appears at 1020cm-1 The Si-O absorption peak appears at 2150cm -1 The absorption peak of Si-H appears at 1264 cm -1 The absorption peak of Si-C appears at

[0042] 3. Preparation of plastics

[0043] (1) 30 g of polypropylene, 20 g of polyethylene, 5 g of maleic anhydride grafted polypropylene, 4 g of functional additives, 0.5 g of antioxidant 1010, 1 g of zinc stearate and 1 g of dibutyl phthalate were added to a mixer, the stirring rate was set to 600 r / min, and after mixing for 30 min, the material was discharged to obtain a premix;

[0044] (2) The premix is ​​passed through a feeder into a twin-screw extruder, and the first stage temperature of the twin-screw extruder is set to 165° C., the second stage temperature is set to 175° C., the third stage temperature is set to 185° C., and the fourth stage temperature is set to 195° C.; the premix is ​​extruded and granulated at a temperature of 155° C. and a rotation speed of 300 r / min to obtain a plastic.

[0045] Example 2

[0046] Preparation of plastics

[0047] (1) 40 g of polypropylene, 30 g of polyethylene, 7 g of maleic anhydride grafted polypropylene, 6.5 g of functional additives, 1 g of antioxidant 1010, 1.5 g of zinc stearate and 2 g of dibutyl phthalate were added to a mixer, the stirring rate was set to 800 r / min, and after mixing for 40 min, the material was discharged to obtain a premix;

[0048] (2) The premix is ​​passed through a feeder into a twin-screw extruder, and the temperature of the first stage of the twin-screw extruder is set to 170° C., the temperature of the second stage is set to 180° C., the temperature of the third stage is set to 190° C., and the temperature of the fourth stage is set to 200° C.; the premix is ​​extruded and granulated at a temperature of 160° C. and a rotation speed of 400 r / min to obtain a plastic.

[0049] Example 3

[0050] Preparation of plastics

[0051] (1) 50 g of polypropylene, 40 g of polyethylene, 9 g of maleic anhydride grafted polypropylene, 8 g of functional additives, 1.5 g of antioxidant 1010, 2 g of zinc stearate and 3 g of dibutyl phthalate were added to a mixer, the stirring rate was set to 1000 r / min, and after mixing for 50 min, the material was discharged to obtain a premix;

[0052] (2) The premix is ​​passed through a feeder into a twin-screw extruder, and the first stage temperature of the twin-screw extruder is set to 175° C., the second stage temperature is set to 185° C., the third stage temperature is set to 195° C., and the fourth stage temperature is set to 205° C.; the premix is ​​extruded and granulated at a temperature of 165° C. and a rotation speed of 500 r / min to obtain a plastic.

[0053] Comparative Example 1

[0054] Preparation of plastics

[0055] (1) 40 g of polypropylene, 30 g of polyethylene, 7 g of maleic anhydride grafted polypropylene, 6.5 g of sepiolite fiber, 1 g of antioxidant 1010, 1.5 g of zinc stearate and 2 g of dibutyl phthalate were added to a mixer, the stirring rate was set to 800 r / min, and after mixing for 40 min, the material was discharged to obtain a premix;

[0056] (2) The premix is ​​passed through a feeder into a twin-screw extruder, and the temperature of the first stage of the twin-screw extruder is set to 170° C., the temperature of the second stage is set to 180° C., the temperature of the third stage is set to 190° C., and the temperature of the fourth stage is set to 200° C.; the premix is ​​extruded and granulated at a temperature of 160° C. and a rotation speed of 400 r / min to obtain a plastic.

[0057] Comparative Example 2

[0058] Preparation of plastics

[0059] (1) 40 g of polypropylene, 30 g of polyethylene, 7 g of maleic anhydride grafted polypropylene, 6.5 g of flame retardant modified component, 1 g of antioxidant 1010, 1.5 g of zinc stearate and 2 g of dibutyl phthalate were added to a mixer, the stirring rate was set to 800 r / min, and after mixing for 40 min, the material was discharged to obtain a premix;

[0060] (2) The premix is ​​passed through a feeder into a twin-screw extruder, and the temperature of the first stage of the twin-screw extruder is set to 170° C., the temperature of the second stage is set to 180° C., the temperature of the third stage is set to 190° C., and the temperature of the fourth stage is set to 200° C.; the premix is ​​extruded and granulated at a temperature of 160° C. and a rotation speed of 400 r / min to obtain a plastic.

[0061] The preparation method of the flame retardant modified component is the same as that in Example 1.

[0062] Comparative Example 3

[0063] Preparation of plastics

[0064] (1) 40 g of polypropylene, 30 g of polyethylene, 7 g of maleic anhydride grafted polypropylene, 1 g of antioxidant 1010, 1.5 g of zinc stearate and 2 g of dibutyl phthalate were added to a mixer, the stirring rate was set to 800 r / min, and after mixing for 40 min, the material was discharged to obtain a premix;

[0065] (2) The premix is ​​passed through a feeder into a twin-screw extruder, and the temperature of the first stage of the twin-screw extruder is set to 170° C., the temperature of the second stage is set to 180° C., the temperature of the third stage is set to 190° C., and the temperature of the fourth stage is set to 200° C.; the premix is ​​extruded and granulated at a temperature of 160° C. and a rotation speed of 400 r / min to obtain a plastic.

[0066] Performance testing:

[0067] The plastics prepared in Examples 1 to 3 of the present invention and Comparative Examples 1 to 3 are made into samples that meet the specifications, and the elongation at break of the samples is tested according to GB / T 1040.1-2018 "Determination of tensile properties of plastics Part 1: General Principles"; the impact strength of the samples is tested according to GB / T1843-2008 "Determination of cantilever beam impact strength of plastics"; the combustion performance of the samples is tested according to GB / T 2406.2-2009 "Determination of combustion behavior of plastics by oxygen index method Part 2: Room temperature test", and the specific test results are shown in Table 1:

[0068] Table 1 - Performance Test

[0069]

[0070]

[0071] From the test results in Table 1, it can be seen that the samples prepared in Examples 1 to 3 have good toughness, impact resistance and flame retardant properties; in the sample prepared in Comparative Example 1, sepiolite fiber is used to replace the functional additive, and the flame retardant performance of the sample is poor, and the sepiolite fiber has not been organically modified, and agglomeration may have occurred in the matrix, resulting in a decrease in the toughness and impact resistance of the sample; in the sample prepared in Comparative Example 2, the flame retardant modified component is used to replace the functional additive, and the flame retardant performance of the sample is good, but due to the lack of hyperbranched structure, the toughness and impact resistance of the sample are not as good as those of the embodiment; in the sample prepared in Comparative Example 3, no functional additive is added, so the various properties of the sample are poor.

[0072] The above contents are merely examples and explanations of the concept of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A process for preparing high-toughness anti-punching plastic, characterized in that: The plastic comprises the following raw materials in parts by weight: 30 to 50 parts of polypropylene, 20 to 40 parts of polyethylene, 5 to 9 parts of compatibilizer, 4 to 8 parts of functional additive, 0.5 to 1.5 parts of antioxidant, 1 to 2 parts of lubricant, and 1 to 3 parts of plasticizer; The preparation process comprises the following steps: (1) adding polypropylene, polyethylene, compatibilizer, functional additive, antioxidant, lubricant and plasticizer into a mixer, setting the stirring rate to 600-1000 r / min, mixing for 30-50 min, discharging the material to obtain a premix; (2) The premix is ​​passed through a feeder and into a twin-screw extruder for melt extrusion to obtain plastic.

2. The process for preparing a high-toughness anti-punching plastic according to claim 1, characterized in that: The preparation method of the functional additive comprises the following steps: S1: ultrasonically dispersing sepiolite fiber in N-methylpyrrolidone to form a uniform dispersion, adding diallylcarbamoyl chloride and an acid binding agent to the dispersion, stirring at room temperature for 4 to 6 hours, filtering, collecting the product, and drying to obtain modified sepiolite fiber; S2: Add the modified sepiolite fiber to dimethyl sulfoxide, ultrasonically disperse for 20 to 30 minutes, pass nitrogen, exhaust the air, add the flame retardant modification component and the platinum catalyst, and after the addition, raise the system temperature to 70 to 90°C under stirring conditions, keep warm for 3 to 7 hours, centrifuge and separate the solid material, wash and dry it to obtain the functional additive.

3. The process for preparing a high-toughness anti-punching plastic according to claim 2, characterized in that: In step S1, the acid binding agent is any one of pyridine or triethylamine.

4. The process for preparing a high-toughness anti-punching plastic according to claim 2, characterized in that: In step S1, the mass ratio of the sepiolite fiber to diallylcarbamoyl chloride is 1:0.1-0.

3.

5. The process for preparing a high-toughness anti-punching plastic according to claim 2, characterized in that: In step S2, the platinum catalyst is an isopropanol solution of chloroplatinic acid.

6. The process for preparing a high-toughness anti-punching plastic according to claim 2, characterized in that: The preparation method of the flame retardant modified component comprises the following steps: SS1: Add 2-[(6-oxy-6H-diphenyl [c,e][1,2]oxaphosphorinane-6-yl)methyl]succinic acid is stirred mechanically and uniformly, and ethylene glycol diglycidyl ether and a phase transfer catalyst are added under continuous nitrogen conditions. After the addition is completed, heating is turned on and the temperature is controlled to 70-80°C. After stirring for 4-8 hours, heating is stopped and nitrogen is removed. After cooling to room temperature, the material is discharged to obtain a polymer intermediate; SS2: Mix the polymeric intermediate with dimethyl sulfoxide, stir to form a uniform solution, then add dimethylchlorosilane and pyridine to the solution. After the addition, raise the temperature to 50-60°C, stir at this temperature for 4-7 hours, and remove the solvent by vacuum distillation to obtain a flame retardant modified component.

7. The process for preparing a high-toughness anti-punching plastic according to claim 6, characterized in that: In step SS1, the phase transfer catalyst is any one of benzyltriethylammonium bromide, tetrabutylammonium bromide or tetrabutylammonium hydrogen sulfate.

8. The process for preparing a high-toughness anti-punching plastic according to claim 1, characterized in that: The antioxidant is any one of antioxidant 1010, antioxidant 168 or antioxidant 1076; the lubricant is any one of stearic acid, calcium stearate or zinc stearate; the plasticizer is any one of dibutyl phthalate, dioctyl phthalate or dioctyl sebacate.

9. The process for preparing a high-toughness anti-punching plastic according to claim 1, characterized in that: In step (2), the set temperatures of the various sections in the twin-screw extruder are: the temperature of the first section is 165-175°C, the temperature of the second section is 175-185°C, the temperature of the third section is 185-195°C, and the temperature of the fourth section is 195-205°C; the extrusion temperature is 155-165°C; and the extrusion speed is 300-500r / min.

10. A high-toughness, impact-resistant plastic, characterized in that: The method is prepared by the preparation process as claimed in claim 1.

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