High toughness impact-resistant plastic and process for its preparation

Abstract

The application relates to the technical field of plastics, and discloses a high-toughness impact-resistant plastic and a preparation process, the plastic comprises the following raw materials: polypropylene, polyethylene, a compatilizer, functional additives, an antioxidant, a lubricant and a plasticizer, wherein the functional additives are sepiolite fiber derivatives coated with nitrogen-phosphorus-silicon ternary synergistic flame retardants; the functional additives have branched structures and carboxyl groups contained in the branched chains, can interact with the compatilizer in the matrix during subsequent melt extrusion, and the extended branched molecular chains can extend into various regions of the matrix material and form a network structure with the matrix by mutual entanglement; the plastic prepared by the application has good toughness, pressure resistance, impact resistance and flame retardant performance, improves the durability of the plastic, effectively prolongs the service life of the plastic, makes the prepared plastic have higher use safety, and effectively improves the application effect of the plastic in various fields.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastics, in particular to a high-toughness impact-resistant plastic and a preparation process. BACKGROUND

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

[0003] With the development of modern industry, higher requirements are put forward for the functionality of plastics. However, the mechanical properties of ordinary PP / PE composite plastics are poor, especially in toughness and impact resistance. When the plastic product is subjected to physical impact, due to the insufficient toughness, micro-cracks may occur in the material, which gradually expands during long-term use, and eventually may lead to material rupture and damage, greatly limiting its more extensive application in plastic storage cabinets, plastic trays and other plastic products. In addition, since the oxygen index of PP and PE is low, they are easily flammable, and release a large amount of heat and melt drops during combustion, the flame propagation speed is fast, and it is not easy to extinguish, which seriously threatens people's life safety and property safety, and limits the application of composite plastics in fire-resistant materials.

[0004] In the prior art, in order to improve the performance of PP / PE composite plastics, the base formula is often optimized. For example, the patent for invention with publication 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 excellent flame-retardant effect with synergistic effect. The halogen-free flame retardant is silane coupling agent coated modified magnesium hydroxide, and the flame-retardant synergist is a mixture of melamine hydrobromide and aluminum hypophosphite. It also has carbon dioxide adsorption effect. The prepared polypropylene material has moderate density and good mechanical properties, and can be applied to various application ranges. Therefore, by adding optimized components during the preparation of PP / PE composite plastics, high-performance PP / PE composite plastics can be prepared. SUMMARY

[0005] In order to solve the problems mentioned in the background art, the purpose of the present application is to provide a high-toughness impact-resistant plastic and a preparation process.

[0006] The purpose of the present application can be achieved by the following technical solutions:

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

[0008] The preparation process comprises the following steps:

[0009] (1) The polypropylene, polyethylene, compatibilizer, functional additive, antioxidant, lubricant, and plasticizer are added to a mixer, the stirring speed is set to 600-1000 r / min, and after mixing for 30-50 min, the mixture is discharged to obtain a premix;

[0010] (2) The premix is fed into a twin-screw extruder through a feeder, and is subjected to melt extrusion to obtain the plastic.

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

[0012] S1: The sepiolite fibers are ultrasonically dispersed in N-methylpyrrolidone to form a uniform dispersion liquid, and then the diallylaminocarbonyl chloride and an acid-binding agent are added to the dispersion liquid, after which the mixture is stirred at room temperature for 4-6 h, filtered, and the product is collected and dried to obtain modified sepiolite fibers;

[0013] S2: The modified sepiolite fibers are added to dimethyl sulfoxide and ultrasonically dispersed for 20-30 min, and then nitrogen gas is introduced to remove air, after which the flame-retardant modification component and a platinum catalyst are added, and the system is heated to 70-90°C under stirring, and maintained for 3-7 h, and then the solid material is separated by centrifugation, and is washed and dried to obtain the functional additive.

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

[0015] Further, in step S1, the mass ratio of the sepiolite fibers to the diallylaminocarbonyl chloride is 1:0.1-0.3.

[0016] Further, in step S2, the platinum catalyst is chloroplatinic acid isopropyl alcohol solution.

[0017] Technical principles: in the functional additive, first, 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 structure of the diallyl aminocarbonyl chloride, thereby introducing unsaturated alkenyl functional groups on the surface of the sepiolite fiber to obtain modified sepiolite fiber; second, the unsaturated alkenyl functional groups on the surface of the modified sepiolite fiber can undergo a silicon-hydrogen addition reaction with the silicon-hydrogen bond in the structure of the flame-retardant modification component under the action of a platinum catalyst. Since the structure of the flame-retardant modification component contains multiple silicon-hydrogen bonds, the functional additive prepared has a branched structure.

[0018] Further, the preparation method of the flame-retardant modification component comprises the following steps:

[0019] SS1: 2-[(6-oxo-6H-dibenz[c,e][1,2]oxaphosphorin-6-yl)methyl] butanedioic acid is added to N,N-dimethylformamide, mechanically stirred until uniform, under continuous nitrogen conditions, ethylene glycol diglycidyl ether and a phase transfer catalyst are added, after addition, heating is started, the temperature is controlled at 70-80℃, after 4-8h of incubation and stirring, heating is stopped and the nitrogen is removed, after the temperature is reduced to room temperature, the product is discharged, and a polymerized intermediate is obtained;

[0020] SS2: The polymerized intermediate is mixed with dimethyl sulfoxide to form a uniform solution, then dimethylchlorosilane and pyridine are added to the solution, after addition, the temperature is raised to 50-60℃, stirring is carried out at this temperature for 4-7h, and the solvent is removed by distillation under reduced pressure to obtain the flame-retardant modification component.

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

[0022] Technical principles: in the flame-retardant modification component, first, under the action of the phase transfer catalyst, the carboxyl groups in the structure of 2-[(6-oxo-6H-dibenz[c,e][1,2]oxaphosphorin-6-yl)methyl] butanedioic acid can undergo a continuous ring-opening reaction with the epoxy groups in the structure of ethylene glycol diglycidyl ether, by controlling the ratio of the amount of 2-[(6-oxo-6H-dibenz[c,e][1,2]oxaphosphorin-6-yl)methyl] butanedioic acid to ethylene glycol diglycidyl ether, a polymerized intermediate containing two equivalents of carboxyl groups and multiple hydroxyl groups in the structure is obtained; second, the polymerized intermediate can react with Si-Cl in the structure of dimethylchlorosilane under the action of pyridine, thereby obtaining a flame-retardant modification component containing multiple silicon-hydrogen bonds in the structure.

[0023] Further, 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; and the plasticizer is any one of dibutyl phthalate, dioctyl phthalate or dioctyl sebacate.

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

[0025] A high-toughness impact-resistant plastic is prepared by the above preparation process.

[0026] The present application has the following advantages:

[0027] (1) The present application uses polypropylene and polyethylene as the base of the plastic, and adds the prepared functional additive to the base material, so that the prepared plastic has a breaking elongation of up to 195.8%, an impact strength of up to 28.7 KJ / m 2 , and an limiting oxygen index of up to 33.6%, and has good toughness, impact resistance and flame retardancy, improves the durability of the plastic, prolongs the service life of the plastic, and widens the application field of the plastic.

[0028] (2) The present application prepares a functional additive as a filling modifier of the plastic, and the functional additive has a branched structure and contains carboxyl groups on the branches, can interact with the compatibilizer in the base during subsequent melt extrusion, and the extended branched molecular chains can extend into each region of the base material and form a network structure with the base, so that when the plastic material is subjected to pressure and impact, the network structure can buffer stress changes and deform to absorb impact energy, thereby improving the pressure resistance and impact resistance of the plastic, on the one hand, the organically modified sepiolite fibers can be uniformly dispersed in the base to avoid the negative effects caused by the agglomeration of sepiolite fibers, and when the plastic material is subjected to impact to generate cracks, the functional additive can bear external load like a bridge and bridge between the cracks to consume the work of external load, 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 retardancy of the plastic, avoid fire, and make the prepared plastic have higher safety, thereby effectively improving the application effect of the plastic in various fields.

[0029] Of course, any product implementing the present application does not necessarily need to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings described in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0031] Figure 1 The infrared spectrum test diagram of the flame-retardant modified component prepared for the embodiment 1 of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present application.

[0033] Embodiment 1

[0034] I. Preparation of functional additive

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

[0036] S2: 5g of the modified sepiolite fiber was added to dimethyl sulfoxide and ultrasonically dispersed for 25min, then nitrogen was introduced to remove air, after air removal, 2.6g of flame-retardant modified component and 0.1g of 2% mass fraction chloroplatinic acid isopropanol solution were added, after addition, the temperature of the system was increased to 80℃ under stirring, and the system was kept at 80℃ for 5h, then the solid material was centrifugally separated, washed and dried to obtain the functional additive.

[0037] The unsaturation value of modified sepiolite fiber and functional additives was tested by titration. 0.5g of modified sepiolite fiber was used as the test sample and ultrasonically dispersed in 150ml of chloroform. Then, 20ml of Widmanstätten solution was added, mixed thoroughly, and allowed to stand in a cool place for 1 hour. Next, 10ml of 15% potassium iodide solution and 100ml of purified water were added and stirred well. The dispersion was titrated using 0.1M sodium thiosulfate as the standard solution. Titration was stopped after the dispersion changed color. 1ml of 1% starch was added as an indicator, and titration continued. Once the color no longer changes, record the volume of standard solution consumed, V (ml). Simultaneously, perform a blank experiment and record the volume of standard solution consumed, V1 (ml). Calculate the unsaturation value of the sample using the formula [(V1-V) / 0.5]×0.1, and the result is 2.836 mmol / g. Following the same steps, test the unsaturation value of 0.5g of functional additive again, and the result is 0.102 mmol / g. This is because the flame-retardant modification component underwent a hydrosilylation reaction with the modified sepiolite fiber, leading to a decrease in the unsaturation value.

[0038] II. Preparation of Flame-Retardant Modifying Components

[0039] SS1: Add 5g of 2-[(6-oxy-6H-diphenyl[c,e][1,2]oxophosphazenecyclohexane-6-yl)methyl]succinic acid to N,N-dimethylformamide and stir mechanically until homogeneous. Under continuous nitrogen atmosphere, add 2.1g of ethylene glycol diglycidyl ether and 0.08g of tetrabutylammonium bromide. After the addition is complete, turn on the heater and control the temperature at 75℃. Keep the heater and stir for 6 hours. Then, stop the heating and remove the nitrogen atmosphere. After cooling to room temperature, discharge the material to obtain the polymerization intermediate.

[0040] SS2: Mix 5g of the polymerization intermediate with dimethyl sulfoxide and stir to form a homogeneous solution. Then add 1.4g of dimethylchlorosilane and 0.05g of pyridine to the solution. After the addition is complete, raise the temperature to 55℃ and stir for 5h under this temperature condition. Remove the solvent by vacuum distillation to obtain the flame-retardant modified component.

[0041] Infrared spectral analysis of the flame-retardant modified components was performed using an AVATAR-360 Fourier transform infrared spectrometer, such as... Figure 1 As shown, by Figure 1 It can be seen that in the infrared spectrum of the flame-retardant modified component, 3041 cm⁻¹ -1 An absorption peak for the carbon-hydrogen bonds in the benzene ring appears at 1280 cm⁻¹. -1 An absorption peak for P=O appears at 1760 cm⁻¹. -1 An absorption peak appears at 1050 cm⁻¹ for the C=O group of the ester group. -1 An absorption peak for the ether bond appears at 1740 cm⁻¹. -1 An absorption peak for the carboxyl group C=O appears at 1020 cm⁻¹.-1 an absorption peak of Si-O appears at 2150 cm -1 an absorption peak of Si-H appears at 1264 cm -1 an absorption peak of Si-C appears.

[0042] III. Preparation of the plastic

[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 into 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 was fed into a twin-screw extruder through a feeder, the temperature of the first section of the twin-screw extruder was set to 165°C, the temperature of the second section was set to 175°C, the temperature of the third section was set to 185°C, and the temperature of the fourth section was set to 195°C; and the extrusion granulation was carried out at a temperature of 155°C and a rotating speed of 300 r / min to obtain the plastic.

[0045] Example 2

[0046] Preparation of the plastic

[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 into 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 was fed into a twin-screw extruder through a feeder, the temperature of the first section of the twin-screw extruder was set to 170°C, the temperature of the second section was set to 180°C, the temperature of the third section was set to 190°C, and the temperature of the fourth section was set to 200°C; and the extrusion granulation was carried out at a temperature of 160°C and a rotating speed of 400 r / min to obtain the plastic.

[0049] Example 3

[0050] Preparation of the plastic

[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 into 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 fed into a twin-screw extruder through a feeder, the temperature of the first section of the twin-screw extruder is set to 175℃, the temperature of the second section is set to 185℃, the temperature of the third section is set to 195℃, and the temperature of the fourth section is set to 205℃; the plastic is obtained by extruding and granulating under the conditions of a temperature of 165℃ and a rotating speed of 500 r / min.

[0053] Comparative Example 1

[0054] Preparation of the plastic

[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 are added to a mixer, the stirring speed is set to 800 r / min, and after mixing for 40 min, the mixture is discharged to obtain a premix;

[0056] (2) The premix is fed into a twin-screw extruder through a feeder, the temperature of the first section of the twin-screw extruder is set to 170℃, the temperature of the second section is set to 180℃, the temperature of the third section is set to 190℃, and the temperature of the fourth section is set to 200℃; the plastic is obtained by extruding and granulating under the conditions of a temperature of 160℃ and a rotating speed of 400 r / min.

[0057] Comparative Example 2

[0058] Preparation of the plastic

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

[0060] (2) The premix is fed into a twin-screw extruder through a feeder, the temperature of the first section of the twin-screw extruder is set to 170℃, the temperature of the second section is set to 180℃, the temperature of the third section is set to 190℃, and the temperature of the fourth section is set to 200℃; the plastic is obtained by extruding and granulating under the conditions of a temperature of 160℃ and a rotating speed of 400 r / min.

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

[0062] Comparative Example 3

[0063] Preparation of the plastic

[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 are added to a mixer, the stirring speed is set to 800 r / min, and after mixing for 40 min, the mixture is discharged to obtain a premix;

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

[0066] Performance testing:

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

[0068] Table 1 - Performance Testing

[0069]

[0070]

[0071] As shown in Table 1, the samples prepared in Examples 1-3 exhibit good toughness, impact resistance, and flame retardancy. In Comparative Example 1, the sample prepared by replacing the functional additive with sepiolite fiber showed poor flame retardancy. Furthermore, the sepiolite fiber, being unmodified organically, may have agglomerated in the matrix, leading to a decrease in toughness and impact resistance. In Comparative Example 2, the sample prepared by replacing the functional additive with a flame-retardant modifier showed good flame retardancy, but due to the lack of a hyperbranched structure, its toughness and impact resistance were inferior to those of the Examples. In Comparative Example 3, no functional additive was added, resulting in poor performance across all aspects.

[0072] The above description is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. A process for the preparation of a high toughness impact resistant plastic, characterized in that, The plastic comprises raw materials in the following weight parts: 30-50 parts of polypropylene, 20-40 parts of polyethylene, 5-9 parts of a compatibilizer, 4-8 parts of a functional additive, 0.5-1.5 parts of an antioxidant, 1-2 parts of a lubricant, and 1-3 parts of a plasticizer. The preparation process comprises the following steps: (1) polypropylene, polyethylene, a compatibilizer, a functional additive, an antioxidant, a lubricant, and a plasticizer are added into a mixer, a stirring speed of 600-1000 r / min is set, and after mixing for 30-50 min, the mixture is discharged to obtain a premix; (2) the premix is fed into a twin-screw extruder through a feeder, and is subjected to melt extrusion to obtain a plastic; The preparation method of the functional additive comprises the following steps: S1: sepiolite fibers are ultrasonically dispersed in N-methylpyrrolidone to form a uniform dispersion liquid, diallylaminocarbonyl chloride and an acid-binding agent are added into the dispersion liquid, after addition, stirring is conducted at room temperature for 4-6 h, the product is collected by filtration, and is dried to obtain modified sepiolite fibers; S2: the modified sepiolite fibers are added into dimethyl sulfoxide, ultrasonic dispersion is conducted for 20-30 min, nitrogen is introduced, after air is discharged, a flame-retardant modification component and a platinum catalyst are added, after addition, the temperature of the system is increased to 70-90 °C under stirring, and the system is kept at the temperature for 3-7 h, the solid material is separated by centrifugation, and is subjected to washing and drying treatment to obtain the functional additive; The preparation method of the flame-retardant modification component comprises the following steps: SS1: 2-[(6-oxo-6H-dibenzo[c,e][1,2]oxaphosphorin-6-yl)methyl]butanedioic acid is added into N,N-dimethylformamide, and is uniformly stirred by mechanical stirring, under continuous nitrogen, ethylene glycol diglycidyl ether and a phase transfer catalyst are added, after addition, heating is started, the temperature is controlled to be 70-80 °C, after keeping stirring for 4-8 h, heating is stopped and the nitrogen is removed, and after the temperature is decreased to room temperature, the product is discharged to obtain a polymerized intermediate; SS2: the polymerized intermediate is mixed with dimethyl sulfoxide to form a uniform solution, dimethylchlorosilane and pyridine are added into the solution, after addition, the temperature is increased to 50-60 °C, stirring is conducted at the temperature for 4-7 h, and the solvent is removed by distillation under reduced pressure to obtain the flame-retardant modification component.

2. A process for the preparation of a high toughness impact resistant plastic as claimed in claim 1, wherein, In step S1, the acid-binding agent is any one of pyridine or triethylamine.

3. The process for the preparation of a high toughness impact resistant plastic as claimed in claim 1 wherein, In step S1, the mass ratio of the sepiolite fibers to diallylaminocarbonyl chloride is 1:0.1-0.

3.

4. The process for the preparation of a high toughness impact resistant plastic as claimed in claim 1, wherein, In step S2, the platinum catalyst is an isopropanol solution of chloroplatinic acid.

5. The preparation process of a high-toughness, impact-resistant plastic according to claim 1, characterized in that, In step SS1, the phase transfer catalyst is any one of benzyltriethylammonium bromide, tetrabutylammonium bromide, or tetrabutylammonium hydrogen sulfate.

6. The process for the preparation of a high toughness impact resistant plastic as claimed in claim 1, wherein, 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; and the plasticizer is any one of dibutyl phthalate, dioctyl phthalate, or dioctyl sebacate.

7. The preparation process of a high-toughness, impact-resistant plastic according to claim 1, characterized in that, In step (2), the temperature of each section of the twin-screw extruder is set as follows: the temperature of the first section is 165-175 DEG C, the temperature of the second section is 175-185 DEG C, the temperature of the third section is 185-195 DEG C, and the temperature of the fourth section is 195-205 DEG C; the extrusion temperature is 155-165 DEG C; and the extrusion speed is 300-500 r / min.

8. A high toughness impact resistant plastic characterized by, The preparation process is as claimed in claim 1.

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