High-gloss high-toughness reinforced polypropylene material and preparation method thereof

Abstract

The invention relates to the technical field of high polymer materials, in particular to a high-gloss high-toughness reinforced polypropylene material and a preparation method thereof. The high-gloss and high-toughness reinforced polypropylene material is prepared from the following raw materials in parts by weight: 43 to 77 parts of block copolymerized polypropylene resin; 0.5 to 1.0 part of a beta crystal form nucleating agent; 0.2 to 0.5 part of talcum powder; 10 to 20 parts of polypropylene random copolymer resin; 10 to 30 parts of glass fiber; 3 to 7 parts of compatilizer; 0.3 to 0.6 part of an antioxidant; and 0.3 to 0.6 part of a lubricant. The high-gloss reinforced polypropylene material is produced by adopting a multi-section combined production process, so that continuous production is realized, and the influence of other components on a beta crystal form nucleating agent and the process of producing beta type polypropylene random copolymer when the raw materials are added at the same time is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, in particular to a high-gloss and high-toughness reinforced polypropylene material and a preparation method thereof. Background Art

[0002] Polypropylene resin is widely used in automotive, home appliances, power tools, and other fields due to its high rigidity, low relative density, and excellent stress and acid / alkali resistance. Furthermore, when polypropylene is filled or reinforced, its physical properties, such as strength, rigidity, and impact strength, are significantly improved. In particular, the addition of glass fiber reinforced polypropylene significantly improves its dimensional stability and heat resistance, enabling it to compete with some engineering plastics in certain applications. However, common glass fiber reinforced materials generally have low gloss and limited toughness, which limits the application of glass fiber reinforced polypropylene, especially in exterior parts, where it cannot be used in large quantities.

[0003] Currently, common methods for producing high-gloss polypropylene (PP) often involve adding minerals and mineral whiskers, such as talc, wollastonite, and calcium sulfate whiskers, to modify the distribution of glass fibers during the molding process. Lubricants and brighteners are then added to enhance the gloss of the material surface. In practical applications, if product weight is a concern, the amount of glass fiber or minerals must be reduced, resulting in a decrease in material performance. Excessive addition of lubricants and brighteners also increases the risk of material precipitation. Chinese patent application CN102532682A, published on April 29, 2015, discloses a low-warpage, high-gloss filled reinforced polypropylene material. Wollastonite is added to improve warpage, resulting in improved gloss but lower notched impact strength. Chinese patent application CN112521686A, published on December 16, 2022, discloses a glass fiber-reinforced polypropylene composition. The resulting reinforced polypropylene material, produced using metallocene, exhibits low floating fiber and high gloss, but the toughness of the material has not been evaluated, and the metallocene cost is high. Therefore, it is urgent to develop a modified polypropylene material that can improve the glossiness of glass fiber reinforced polypropylene without affecting its impact toughness. Summary of the Invention

[0004] In view of the above deficiencies in the prior art, the object of the present invention is to provide a high-gloss and high-toughness reinforced polypropylene material. The β-crystal nucleating agent mixture used is introduced with talc powder, which makes up for the deficiency of the tensile and bending properties caused by the single modification of polypropylene with the β-crystal nucleating agent, thereby greatly improving the performance of the polypropylene material.

[0005] Another object of the present invention is to provide a method for preparing a high-gloss, high-toughness reinforced polypropylene material, which adopts a multi-stage combined production process to produce the high-gloss reinforced polypropylene material, thereby achieving continuous production and effectively avoiding the influence of other ingredients on the β-crystal nucleating agent and the process of producing β-random copolymer polypropylene when the raw materials are added at the same time.

[0006] The present invention is achieved by adopting the following technical solutions:

[0007] The high-gloss and high-toughness reinforced polypropylene material is composed of the following raw materials in parts by weight: block copolymer polypropylene resin: 43-77 parts; random copolymer polypropylene resin: 10-20 parts; β-crystal nucleating agent: 0.5-1.0 parts; talc powder: 0.2-0.5 parts; glass fiber: 10-30 parts; compatibilizer: 3-7 parts; antioxidant: 0.3-0.6 parts; and lubricant: 0.3-0.6 parts.

[0008] The random copolymer polypropylene resin has an ethylene content of 2-6 wt% and a melt index of 0.2-1 g / 10 min.

[0009] The compatibilizer is PP grafted maleic anhydride; the antioxidant is a mixture of a main antioxidant and a secondary antioxidant in a mass ratio of 1:(1-3), preferably 1:2, wherein the main antioxidant is at least one of 1010 and 1076, the secondary antioxidant is at least one of 168 and 626, and the lubricant is at least one of zinc stearate, calcium stearate, EBS, and erucamide.

[0010] The method for preparing the high-gloss and high-toughness reinforced polypropylene material comprises the following steps:

[0011] S1: 5-10 parts of random copolymer polypropylene resin are pre-cooled and ground into powder using liquid nitrogen. The powder is then poured into a high-speed mixer and a mixture of a β-crystal nucleating agent is added and mixed to obtain base material A.

[0012] S2: adding the remaining random copolymer polypropylene without adding β-crystal nucleating agent to the base material A of S1, and continuing to mix in a high-speed mixer;

[0013] S3: adding the mixture prepared in step S2 from the main feed port of the first stage extruder, and extruding and granulating it in this stage to obtain a β-crystal random copolymer polypropylene resin;

[0014] (2) Preparation of high gloss and high toughness reinforced polypropylene materials:

[0015] SS1: Place block copolymer polypropylene resin, compatibilizer, antioxidant, and lubricant in a low-pressure mixer and mix to obtain premix B;

[0016] SS2: The β-crystal random copolymer polypropylene prepared in step (1) and the premix B obtained in step SS1 are added simultaneously from the main feed port of the second-stage extruder, and the glass fiber is added from the side feed port of the first-stage extruder. After melt blending, cooling and pelletizing in the extruder, a high-gloss and high-toughness reinforced polypropylene material is obtained.

[0017] The β-crystal nucleating agent mixture in step S1 is a mixture of a β-crystal nucleating agent and talc powder, wherein the specification of the talc powder is SiO2 ≥ 60% and the mesh size is 3000-5000 mesh; the mass proportion of talc powder in the β-crystal nucleating agent mixture is 10%-50%.

[0018] In the step S1, the precooling time is 3-5 minutes, the frequency is 25-50 Hz, and the grinding time is 5-10 minutes.

[0019] The β-crystal random copolymer polypropylene is prepared by compounding random copolymer polypropylene with a β-crystal nucleating agent and talc, and then melt-extruding the mixture through a first-stage extruder of a compounding and blending extruder. In step S3, the processing temperature of the first-stage compounding extruder is: 80-110° C. in zone 1, 160-190° C. in zone 2, 180-200° C. in zone 3, 180-200° C. in zone 4, 180-200° C. in zone 5, 180-200° C. in zone 6, 180-200° C. in zone 7, and 180-200° C. in zone 8.

[0020] In the step SS2, the extrusion temperatures in each zone of the second section extruder are 80-100°C in zone 1, 190-200°C in zone 2, 210-230°C in zone 3, 210-230°C in zone 4, 210-230°C in zone 5, 210-230°C in zone 6, 210-230°C in zone 7, and 220-230°C in zone 8.

[0021] High-gloss and high-toughness reinforced polypropylene materials are used in home appliances, automobiles, power tools and other fields.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The present invention utilizes a multi-stage combined production process to produce a high-gloss enhanced polypropylene material. Specifically, a β-crystal random copolymer polypropylene is produced in the first stage of a compounding extruder. This β-crystal random copolymer polypropylene is then fed in a molten state as a raw material into the feed port of a second stage compounding extruder. Glass fiber, an antioxidant, a lubricant, and other materials are also added to this stage. This processing method enables continuous production and effectively avoids the effects of other ingredients on the β-crystal nucleating agent and the production process of the β-crystal random copolymer polypropylene when the raw materials are added simultaneously.

[0024] (2) The β-crystal nucleating agent mixture used in the present invention incorporates talc, which compensates for the decreased tensile and flexural properties caused by the use of a single β-crystal nucleating agent in modified polypropylene, demonstrating that a small amount of talc and the β-crystal nucleating agent exhibit a good synergistic effect. Furthermore, the Examples and Comparative Examples also demonstrate that the addition of excessive amounts of talc, an inorganic filler, significantly reduces the impact properties of the formulation, likely due to the negative impact of excessive talc on β-nucleation.

[0025] (3) The random copolymerized polypropylene material used in the present invention has a homogeneous system formed by random copolymerization, which makes the internal structure of the material more uniform and the surface flatness higher, thereby enhancing the specular reflection of light and improving the gloss of the material.

[0026] (4) The high-gloss and high-toughness reinforced polypropylene material prepared by the present invention can be used in the fields of home appliances, automobiles, power tools, etc. DETAILED DESCRIPTION

[0027] In order to make the purpose and technical solution of the present invention more clear, the present invention is further described in detail below.

[0028] In the following examples and comparative examples, the sources of raw materials are as follows:

[0029] Random copolymer polypropylene resin: PP B4902, commercially available from Shanghai Secco Petrochemical Co., Ltd.

[0030] β-crystal nucleating agent: TMB-5, a commercial product from Shanxi Chemical Research Institute;

[0031] Talc: JETFINE 3DN, a commercially available product from IMERYS;

[0032] Block copolymer polypropylene resin: PP EP548RQ, commercially available from SINOPEC (Tianjin) Petrochemical Co., Ltd.

[0033] Compatibilizer: CMG5701, commercially available from Jiayirong Polymer (Shanghai) Co., Ltd.

[0034] Glass fiber: ECS13-03-508C, commercially available from China Jushi Co., Ltd.

[0035] Primary antioxidant 1010: a commonly available commercial product;

[0036] Secondary antioxidant 168: a common commercially available product;

[0037] Lubricant: Calcium stearate S, a commercial product of Faji Chemicals (Zhangjiagang) Co., Ltd.

[0038] Example 1

[0039] (1) Preparation of β-crystalline random copolymer polypropylene

[0040] S1: 5 parts of random copolymer polypropylene resin were cryogenically ground into polypropylene powder using liquid nitrogen. The pre-cooling time was 3 minutes, the frequency was 25 Hz, and the grinding time was 5 minutes. After taking out, the powder was poured into a high-speed mixer, and 0.5 parts of β-crystal nucleating agent and 0.2 parts of talc were added and mixed to obtain base material A.

[0041] S2: Add the remaining 5 parts of random copolymer polypropylene without adding β-crystal nucleating agent into the base material A of S1, and continue mixing in a high-speed mixer.

[0042] S3: The mixture prepared in step S2 is added from the main feed port of the first-stage extruder, and extruded through this stage to obtain a β-crystal random copolymer polypropylene resin.

[0043] (2) Preparation of high gloss and high toughness reinforced polypropylene materials

[0044] SS1: 77 parts of block copolymer polypropylene resin, 3 parts of compatibilizer, 0.3 parts of antioxidant (the mass ratio of primary antioxidant to secondary antioxidant is 1:2), and 0.3 parts of lubricant are placed in a low-pressure mixer and mixed for 5 minutes to obtain premix B.

[0045] SS2: 10 parts of the β-crystal random copolymer polypropylene prepared in step (1) and the premix B obtained in step SS1 are added simultaneously from the main feed port of the second-stage extruder, and 10 parts of glass fiber are added from the side feed port of the first-stage extruder. After melt blending, cooling and pelletizing in the extruder, a high-gloss and high-toughness reinforced polypropylene material is obtained.

[0046] (3) Processing technology: The processing temperature of each zone of the first-stage extruder in step S3 is: 80°C in zone 1, 160°C in zone 2, 180°C in zone 3, 180°C in zone 4, 180°C in zone 5, 180°C in zone 6, 180°C in zone 7, and 180°C in zone 8. The processing temperature of the second-stage compounding extruder in step SS2 is: 80°C in zone 1, 190°C in zone 2, 210°C in zone 3, 210°C in zone 4, 210°C in zone 5, 210°C in zone 6, 210°C in zone 7, and 210°C in zone 8.

[0047] Example 2

[0048] (1) Preparation of β-crystalline random copolymer polypropylene

[0049] S1: 5 parts of random copolymer polypropylene resin were cryogenically ground into polypropylene powder using liquid nitrogen. The pre-cooling time was 5 minutes, the frequency was 50 Hz, and the grinding time was 10 minutes. The powder was then poured into a high-speed mixer, and 1 part of a β-crystal nucleating agent and 0.5 parts of talc were added to obtain base material A.

[0050] S2: Add the remaining 5 parts of random copolymer polypropylene without adding β-crystal nucleating agent into the base material A of S1, and continue mixing in a high-speed mixer.

[0051] S3: The mixture prepared in step S2 is added from the main feed port of the first-stage extruder, and extruded through this stage to obtain a β-crystal random copolymer polypropylene resin.

[0052] (2) Preparation of high gloss and high toughness reinforced polypropylene materials

[0053] SS1: 63 parts of block copolymer polypropylene resin, 7 parts of compatibilizer, 0.6 parts of antioxidant (the mass ratio of primary antioxidant to secondary antioxidant is 1:2), and 0.6 parts of lubricant are placed in a low-pressure mixer and mixed for 5 minutes to obtain premix B.

[0054] SS2: 10 parts of the β-crystal random copolymer polypropylene prepared in step (1) and the premix B obtained in step SS1 are added simultaneously from the main feed port of the second-stage extruder, and 20 parts of glass fiber are added from the side feed port of the first-stage extruder. After melt blending, cooling and pelletizing in the extruder, a high-gloss and high-toughness reinforced polypropylene material is obtained.

[0055] (3) Processing technology: The processing temperature of each zone of the first-stage extruder in step S3 is: 110°C in zone 1, 190°C in zone 2, 210°C in zone 3, 200°C in zone 4, 200°C in zone 5, 200°C in zone 6, 200°C in zone 7, and 200°C in zone 8. The processing temperature of the second-stage compounding extruder in step SS2 is: 100°C in zone 1, 200°C in zone 2, 230°C in zone 3, 230°C in zone 4, 230°C in zone 5, 230°C in zone 6, 230°C in zone 7, and 230°C in zone 8.

[0056] Example 3

[0057] (1) Preparation of β-crystalline random copolymer polypropylene

[0058] S1: 5 parts of random copolymer polypropylene resin were cryogenically ground into polypropylene powder using liquid nitrogen. The pre-cooling time was 5 minutes, the frequency was 50 Hz, and the grinding time was 10 minutes. The powder was then poured into a high-speed mixer, and 1 part of a β-crystal nucleating agent and 0.5 parts of talc were added to obtain base material A.

[0059] S2: Add the remaining 5 parts of random copolymer polypropylene without adding β-crystal nucleating agent into the base material A of S1, and continue mixing in a high-speed mixer.

[0060] S3: The mixture prepared in step S2 is added from the main feed port of the first-stage extruder, and extruded through this stage to obtain a β-crystal random copolymer polypropylene resin.

[0061] (2) Preparation of high gloss and high toughness reinforced polypropylene materials

[0062] SS1: 53 parts of block copolymer polypropylene resin, 7 parts of compatibilizer, 0.6 parts of antioxidant (the mass ratio of primary antioxidant to secondary antioxidant is 1:2), and 0.6 parts of lubricant are placed in a low-pressure mixer and mixed for 5 minutes to obtain premix B.

[0063] SS2: 10 parts of the β-crystal random copolymer polypropylene prepared in step (1) and the premix B obtained in step SS1 are added simultaneously from the main feed port of the second-stage extruder, and 30 parts of glass fiber are added from the side feed port of the first-stage extruder. After melt blending, cooling and pelletizing in the extruder, a high-gloss and high-toughness reinforced polypropylene material is obtained.

[0064] (3) Processing technology: The processing temperature of each zone of the first-stage extruder in step S3 is: 80°C in zone 1, 160°C in zone 2, 180°C in zone 3, 180°C in zone 4, 180°C in zone 5, 180°C in zone 6, 180°C in zone 7, and 180°C in zone 8. The processing temperature of the second-stage compounding extruder in step SS2 is: 80°C in zone 1, 190°C in zone 2, 210°C in zone 3, 210°C in zone 4, 210°C in zone 5, 210°C in zone 6, 210°C in zone 7, and 210°C in zone 8.

[0065] Example 4

[0066] (1) Preparation of β-crystalline random copolymer polypropylene

[0067] S1: 10 parts of random copolymer polypropylene resin were cryogenically ground into polypropylene powder using liquid nitrogen. The pre-cooling time was 3 minutes, the frequency was 25 Hz, and the grinding time was 5 minutes. The powder was then poured into a high-speed mixer, and 0.5 parts of a β-crystal nucleating agent and 0.2 parts of talc were added to obtain base material A.

[0068] S2: The remaining 10 parts of random copolymer polypropylene without adding β-crystal nucleating agent are added to the base material A of S1, and the mixing is continued in a high-speed mixer.

[0069] S3: The mixture prepared in step S2 is added from the main feed port of the first-stage extruder, and extruded through this stage to obtain a β-crystal random copolymer polypropylene resin.

[0070] (2) Preparation of high gloss and high toughness reinforced polypropylene materials

[0071] SS1: 67 parts of block copolymer polypropylene resin, 3 parts of compatibilizer, 0.3 parts of antioxidant (the mass ratio of primary antioxidant to secondary antioxidant is 1:2), and 0.3 parts of lubricant are placed in a low-pressure mixer and mixed for 5 minutes to obtain premix B.

[0072] SS2: 20 parts of the β-crystal random copolymer polypropylene prepared in step (1) and the premix B obtained in step SS1 are added simultaneously from the main feed port of the second-stage extruder, and 10 parts of glass fiber are added from the side feed port of the first-stage extruder. After melt blending, cooling and pelletizing in the extruder, a high-gloss and high-toughness reinforced polypropylene material is obtained.

[0073] (3) Processing technology: The processing temperature of each zone of the first-stage extruder in step S3 is: 80°C in zone 1, 160°C in zone 2, 180°C in zone 3, 180°C in zone 4, 180°C in zone 5, 180°C in zone 6, 180°C in zone 7, and 180°C in zone 8. The processing temperature of the second-stage compounding extruder in step SS2 is: 80°C in zone 1, 190°C in zone 2, 210°C in zone 3, 210°C in zone 4, 210°C in zone 5, 210°C in zone 6, 210°C in zone 7, and 210°C in zone 8.

[0074] Comparative Example 1

[0075] The difference from Example 1 is that when preparing β-crystal random copolymer polypropylene, the pre-cooling time is 10 min, the frequency is 80 Hz, the grinding time is 10 min, and after taking it out, it is poured into a high-speed mixer, and a 3 wt% mass ratio of the β-crystal nucleating agent mixture is added and mixed, wherein the mass proportion of talc in the mixture is 10%.

[0076] Comparative Example 2

[0077] The difference from Example 1 is that when preparing β-crystal random copolymer polypropylene, the pre-cooling time is 1 min, the frequency is 10 Hz, the grinding time is 2 min, and after taking it out, it is poured into a high-speed mixer, and 0.2 wt% of the β-crystal nucleating agent mixture is added and mixed, wherein the mass proportion of talc powder in the mixture is 10%.

[0078] Comparative Example 3

[0079] The difference from Example 2 is that no β-crystalline polypropylene is added when preparing the high-gloss polypropylene material, that is, the portion of block copolymerized polypropylene in this comparative example is 73 parts, and the other parameters remain unchanged.

[0080] Comparative Example 4

[0081] The difference from Example 2 is that no block copolymer polypropylene is added when preparing the high-gloss polypropylene material, that is, all β-crystalline polypropylene is used, with a total of 73 parts, and other parameters remain unchanged.

[0082] Comparative Example 5

[0083] The difference from Example 1 is that the processing temperatures of the zones of the first extruder in step S3 are: 160° C. in zone 1, 220° C. in zone 2, 250° C. in zone 3, 250° C. in zone 4, 250° C. in zone 5, 250° C. in zone 6, 250° C. in zone 7, and 250° C. in zone 8. The processing temperatures of the second-stage compounding extruder in step SS2 are: 150° C. in zone 1, 250° C. in zone 2, 250° C. in zone 3, 250° C. in zone 4, 250° C. in zone 5, 250° C. in zone 6, 250° C. in zone 7, and 280° C. in zone 8.

[0084] Comparative Example 6

[0085] The difference from Example 1 is that the step of preparing β-crystal random copolymer polypropylene is omitted. That is, in step SS1, 10 parts of random copolymer polypropylene, 0.5 parts of a β-crystal nucleating agent mixture, 0.2 parts of talc, 77 parts of block copolymer polypropylene resin, 3 parts of a compatibilizer, 0.3 parts of an antioxidant, and 0.3 parts of a lubricant are placed in a low-pressure mixer and mixed for 5 minutes to obtain premix B. All other conditions remain unchanged.

[0086] Comparative Example 7

[0087] The difference from Example 1 is that the 0.5 parts by mass of the β-crystal nucleating agent mixture added in step S1 does not contain talc, that is, it is entirely β-crystal nucleating agent.

[0088] Comparative Example 8

[0089] The difference from Example 1 is that 0.2 parts of talc powder is added in step S1, and no β-crystal nucleating agent is added.

[0090] The modified polypropylenes prepared in Examples 1-4 and Comparative Examples 1-8 were subjected to performance tests, and the test results are shown in Table 1. The performance test standards and methods are as follows: density was tested in accordance with GB / T 1033, Determination of density of non-foamed plastics; melt index was tested in accordance with GB / T 3682, Thermoplastics - Determination of melt mass-flow rate and melt volume-flow rate; tensile strength was tested in accordance with GB / T 1040, Plastics - Determination of tensile properties; flexural modulus was tested in accordance with GB / T 9341, Plastics - Determination of flexural properties; notched Izod impact was tested in accordance with GB / T 1843, Plastics - Determination of cantilever impact strength; and plastic gloss was tested in accordance with GB 8807-88, Test method for specular gloss of plastics.

[0091] Table 1: Performance test results of modified polypropylene prepared in Examples 1-4 and Comparative Examples 1-8

[0092]

[0093] As can be seen from Table 1, the high-gloss and high-toughness reinforced polypropylene material prepared by this method has a higher gloss and has a higher impact strength relative to conventional high-gloss polypropylene. As can be seen from Example 1 and Comparative Example 1, when preparing β-crystalline polypropylene in step 1, maintaining effective grinding conditions can achieve better performance, without excessively increasing conditions such as grinding time and pre-cooling time, thereby reducing waste of resources. As can be seen from Example 1 and Comparative Example 2, when preparing β-crystalline polypropylene in step 1, if the pre-cooling time and grinding time are reduced, β-crystalline polypropylene cannot be effectively prepared. This may be because the powder is not fully ground, so that the nucleating agent (powdered) and the pellets cannot be mixed evenly, resulting in large fluctuations in the performance of the produced β-crystalline polypropylene, and the toughness and gloss of the material are lower. As can be seen from Example 2 and Comparative Examples 3 and 4, when the β-polypropylene in the formula is removed, the toughness and gloss of the material are reduced; when the block copolymer polypropylene in the formula is removed, although the material can have better impact and gloss, the melt index of the prepared material is low, which may affect the back-end use effect. As can be seen from Example 1 and Comparative Example 5, when the processing temperature is increased, the melt index of the material increases significantly, and the impact and glossiness decrease more. This may be because the temperature is too high, which causes the decomposition of the material. As can be seen from Example 1 and Comparative Example 6, when the step of preparing β-crystalline polypropylene is removed, that is, random copolymer polypropylene, β-crystalline nucleating agent, block copolymer polypropylene, compatibilizer, antioxidant and lubricant are mixed and then added from the second stage extruder of step SS1, the gloss and impact properties of the material decrease significantly. This may be because after mixing and adding in one pot, the mutual influence between the materials and the indiscriminate use of the extrusion process reduce the activity of the nucleating agent. As can be seen from Example 1 and Comparative Example 7, in the system without adding talcum powder, the strength and modulus of the material both decrease slightly; as can be seen from Example 1 and Comparative Example 8, in the system without adding β-crystalline nucleating agent, that is, using talcum powder in its entirety, the impact and gloss of the material are significantly affected. Combining Example 1 with Comparative Examples 7 and 8, it can be seen that in this system, the combination of talc and β-crystal nucleating agent has obvious synergistic effect.

Claims

1. A high gloss and high toughness reinforced polypropylene material, characterized in that: The invention is composed of the following raw materials in parts by weight: 43-77 parts of block copolymerized polypropylene resin; 0.5-1.0 parts of beta crystal nucleating agent; 0.2-0.5 parts of talc powder; 10-20 parts of random copolymerized polypropylene resin; 10-30 parts of glass fiber; 3-7 parts of compatibilizer; 0.3-0.6 parts of antioxidant; and 0.3-0.6 parts of lubricant.

2. The high gloss and high toughness reinforced polypropylene material according to claim 1, characterized in that: The random copolymer polypropylene resin has an ethylene content of 2-6 wt% and a melt index of 0.2-1 g / 10 min.

3. The high gloss and high toughness reinforced polypropylene material according to claim 1, characterized in that: The compatibilizer is PP grafted maleic anhydride; the antioxidant is obtained by mixing a main antioxidant and an auxiliary antioxidant in a mass ratio of 1:(1-3), wherein the main antioxidant is at least one of 1010 and 1076, and the auxiliary antioxidant is at least one of 168 and 626; the lubricant is at least one of zinc stearate, calcium stearate, EBS, and erucamide.

4. A method for preparing the high-gloss and high-toughness reinforced polypropylene material according to any one of claims 1 to 3, characterized in that: The following steps are involved: (1) Preparation of β-crystal random copolymer polypropylene: S1: 5-10 parts of random copolymer polypropylene resin are pre-cooled and ground into powder using liquid nitrogen. The powder is then poured into a high-speed mixer and a mixture of a β-crystal nucleating agent is added and mixed to obtain base material A. S2: adding the remaining random copolymer polypropylene without adding β-crystal nucleating agent to the base material A of S1, and continuing to mix in a high-speed mixer; S3: adding the mixture prepared in step S2 from the main feed port of the first stage extruder, and extruding and granulating it in this stage to obtain a β-crystal random copolymer polypropylene resin; (2) Preparation of high gloss and high toughness reinforced polypropylene materials: SS1: Place block copolymer polypropylene resin, compatibilizer, antioxidant, and lubricant in a low-pressure mixer and mix to obtain premix B; SS2: The β-crystal random copolymer polypropylene prepared in step (1) and the premix B obtained in step SS1 are added simultaneously from the main feed port of the second-stage extruder, and the glass fiber is added from the side feed port of the first-stage extruder. After melt blending, cooling and pelletizing in the extruder, a high-gloss and high-toughness reinforced polypropylene material is obtained.

5. The method for preparing the high-gloss and high-toughness reinforced polypropylene material according to claim 4, characterized in that: The β-crystal nucleating agent mixture in step S1 is a mixture of a β-crystal nucleating agent and talc powder, wherein the specification of the talc powder is SiO2 ≥ 60% and the mesh size is 3000-5000 mesh; the mass proportion of talc powder in the β-crystal nucleating agent mixture is 10%-50%.

6. The method for preparing the high-gloss and high-toughness reinforced polypropylene material according to claim 4, characterized in that: In the step S1, the precooling time is 3-5 minutes, the frequency is 25-50 Hz, and the grinding time is 5-10 minutes.

7. The method for preparing a high-gloss and high-toughness reinforced polypropylene material according to claim 4, characterized in that: The β-crystal random copolymer polypropylene is prepared by compounding random copolymer polypropylene with a β-crystal nucleating agent and talc, and then melt-extruding the mixture through a first-stage extruder of a compounding and blending extruder. In step S3, the processing temperature of the first-stage compounding extruder is: 80-110° C. in zone 1, 160-190° C. in zone 2, 180-200° C. in zone 3, 180-200° C. in zone 4, 180-200° C. in zone 5, 180-200° C. in zone 6, 180-200° C. in zone 7, and 180-200° C. in zone 8.

8. The method for preparing a high-gloss and high-toughness reinforced polypropylene material according to claim 4, characterized in that: The extrusion temperatures of each zone of the second-stage extruder are 80-100°C in zone 1, 190-200°C in zone 2, 210-230°C in zone 3, 210-230°C in zone 4, 210-230°C in zone 5, 210-230°C in zone 6, 210-230°C in zone 7, and 220-230°C in zone 8.

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