Plastic Composition, Plastic Composite Material, Prefabricated Plastic Track and Preparation Method

Abstract

The present application relates to a plastic composition, a plastic composite material, a prefabricated plastic runway and a preparation method. The above-mentioned plastic composition comprises components in the following parts by mass: 5 to 30 parts of styrene-butadiene rubber, 5 to 25 parts of natural rubber, 5 to 25 parts of thermoplastic polyurethane, 10 to 50 parts of filler, 1 to 30 parts of fumed silica, 1 to 10 parts of anti-aging agent, 1 to 10 parts of color powder, 1 to 5 parts of vulcanizing agent, 1 to 6 parts of accelerator, and 1 to 20 parts of softening agent. In the present application, styrene-butadiene rubber, natural rubber, thermoplastic polyurethane and filler are used as main components, and functional additives such as fumed silica, anti-aging agent, color powder and vulcanizing agent are compounded. By adjusting the ratio between each component, a plastic composition with good strength, wear resistance and shock absorption performance is prepared.

Description

Technical Field

[0001] This application relates to the field of sports equipment, and particularly to a plastic composition, a plastic composite material, a prefabricated plastic runway and a preparation method thereof. Background Art

[0002] Plastic runways are mainly divided into on-site casting type and prefabricated type. The on-site casting type plastic runway needs to be proportioned and processed on the construction site, which has defects such as large thickness error, poor flatness and long construction period. The prefabricated plastic runway is to pre-fabricate the raw materials into coils in the factory and then stick and lay them on the site. The traditional prefabricated plastic runway usually has a double-layer structure. The upper layer is a high-toughness wear-resistant surface layer, and its surface has irregular patterns with a depth of 1-2 mm to improve the anti-slip, wear-resistant and anti-reflection properties of the runway; the lower layer is a high-elastic bottom layer to provide shock absorption and resilience. However, the production process of the traditional double-layer structure prefabricated plastic runway is relatively complex and the equipment investment is large, but ordinary single wear-resistant surface layer materials or high-elastic bottom layer materials cannot meet the requirements of strength, wear resistance and shock absorption performance at the same time.

[0003] Therefore, how to provide a plastic composition, a plastic composite material and a prefabricated plastic runway with simple preparation and capable of taking into account strength, wear resistance and shock absorption performance has become an urgent technical problem to be solved. Summary of the Invention

[0004] Based on this, this application provides a plastic composition, a plastic composite material and a prefabricated plastic runway with good strength, wear resistance and shock absorption performance and simple process. In addition, this application also provides the applications of the above plastic composition and plastic composite material, and the preparation method of the above prefabricated plastic runway.

[0005] In the first aspect, a plastic composition is provided, which includes the following components in parts by mass: 5-30 parts of styrene-butadiene rubber, 5-25 parts of natural rubber, 5-25 parts of thermoplastic polyurethane, 10-50 parts of filler, 1-30 parts of fumed silica, 1-10 parts of anti-aging agent, 1-10 parts of color powder, 1-5 parts of vulcanizing agent, 1-6 parts of accelerator and 1-20 parts of softening agent.

[0006] This application uses styrene-butadiene rubber, natural rubber, thermoplastic polyurethane, and fillers as the main components, and compounded functional additives such as fumed silica, anti-aging agents, color pigments, and vulcanizing agents. By regulating the ratios between the components, a plastic composition with good strength, wear resistance, and shock absorption performance is prepared. Specifically, in the traditional styrene-butadiene rubber and natural rubber systems, thermoplastic polyurethane with a relatively high cohesive energy is added to improve the tensile strength, wear resistance, and resilience of the plastic composition. Secondly, styrene-butadiene rubber, natural rubber, and thermoplastic polyurethane are compounded in specific mass fractions to make them have good compatibility and improve the comprehensive performance of the product. Finally, fumed silica with good reinforcing and dispersing properties is added to further improve the strength of the product.

[0007] In some embodiments, the components include the following mass fractions: 10 - 25 parts of styrene-butadiene rubber, 10 - 20 parts of natural rubber, 10 - 20 parts of thermoplastic polyurethane, 15 - 40 parts of filler, 1 - 10 parts of fumed silica, 1 - 5 parts of anti-aging agent, 1 - 10 parts of color pigment, 1 - 3 parts of vulcanizing agent, 1 - 4 parts of accelerator, and 1 - 20 parts of softening agent.

[0008] In some embodiments, the mass ratio of styrene-butadiene rubber, natural rubber, and thermoplastic polyurethane is (1 - 2.5):(1 - 2):(1 - 2.5).

[0009] In some embodiments, the thermoplastic polyurethane includes polybutadiene-based polyurethane.

[0010] In some embodiments, the raw materials for preparing the polybutadiene-based polyurethane include the following mass fractions of components: 50 - 90 parts of hydroxyl-terminated polybutadiene, 5 - 20 parts of 1,4-butanediol, and 30 - 60 parts of diphenylmethane diisocyanate.

[0011] In some embodiments, the anti-aging agent includes 2,6-di-tert-butyl-p-cresol.

[0012] In some embodiments, the color pigment includes at least one of iron oxide red and lightfast scarlet.

[0013] In some embodiments, the vulcanizing agent includes sulfur.

[0014] In some embodiments, the accelerator includes at least one of accelerator TMTD and accelerator H.

[0015] In some embodiments, the softening agent includes at least one of naphthenic oil and mineral oil.

[0016] In some embodiments, the filler includes calcium carbonate with a particle size of 1000 - 15000 mesh.

[0017] In a second aspect, a plastic composite material is provided, and the raw materials for its preparation include the plastic composition of the first aspect.

[0018] In a third aspect, a prefabricated plastic runway is provided, and the raw materials for its preparation include the plastic composition of the first aspect or the plastic composite material of the second aspect.

[0019] In a fourth aspect, a method for preparing the prefabricated plastic runway of the third aspect is provided, including the following steps:

[0020] Mix styrene-butadiene rubber, natural rubber, thermoplastic polyurethane, filler, fumed silica, anti-aging agent, color powder and softener to obtain a rubber compound.

[0021] Open mill and calender the rubber compound to obtain a sheet-shaped rubber compound.

[0022] Mix the sheet-shaped rubber compound with a vulcanizing agent and an accelerator and perform vulcanization, and then perform calendering.

[0023] In some of the embodiments, the method for preparing thermoplastic polyurethane includes the following steps:

[0024] Mix hydroxyl-terminated polybutadiene and diphenylmethane diisocyanate, and heat to prepare a prepolymer.

[0025] Add 1,4-butanediol to the prepolymer to prepare thermoplastic polyurethane. Detailed embodiments

[0026] For the convenience of understanding the present invention, the present invention will be described more comprehensively below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the understanding of the disclosure of the present invention is more thorough and comprehensive.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] Traditional prefabricated plastic runways are of a double-layer structure, with a high-toughness and wear-resistant surface layer on the upper layer and a high-elastic bottom layer on the lower layer. The mutual matching of the two gives the runway better elasticity and mechanical strength. However, its production process is relatively complex. Usually, the raw materials of the upper and lower layers need to be made into surface layer films and bottom layer films respectively first, and then the above two films are compounded and vulcanized to obtain a prefabricated runway with a double-layer structure. In this way, not only the production efficiency is affected, but also the equipment investment is large, increasing the production cost. However, a single surface layer film or bottom layer film cannot simultaneously meet the requirements of strength, wear resistance, and shock absorption performance.

[0029] Based on this, an embodiment of the present application provides a plastic composition, including the following components in parts by mass: 5 to 30 parts of styrene-butadiene rubber, 5 to 25 parts of natural rubber, 5 to 25 parts of thermoplastic polyurethane, 10 to 50 parts of filler, 1 to 30 parts of fumed silica, 1 to 10 parts of anti-aging agent, 1 to 10 parts of color powder, 1 to 5 parts of vulcanizing agent, 1 to 6 parts of accelerator, and 1 to 20 parts of softening agent.

[0030] In some embodiments, the plastic composition consists of the above components in parts by mass.

[0031] Styrene-butadiene rubber can provide wear resistance, heat resistance, aging resistance, and strength performance. Optionally, the parts by mass of styrene-butadiene rubber are 5 parts, 10 parts, 15 parts, 20 parts, 25 parts, or 30 parts. It can be understood that the parts by mass of styrene-butadiene rubber can also be other suitable choices within the range of 5 to 30 parts.

[0032] Natural rubber has high elasticity and buffering performance, and can improve the shock absorption ability of products. Optionally, the parts by mass of natural rubber are 5 parts, 10 parts, 15 parts, 20 parts, or 25 parts. It can be understood that the parts by mass of natural rubber can also be other suitable choices within the range of 5 to 25 parts.

[0033] Thermoplastic polyurethane has urethane bonds, with a relatively large cohesive energy, good tensile strength and elongation at break, and good resilience. Therefore, it can improve the strength and shock absorption performance of products. Optionally, the parts by mass of thermoplastic polyurethane are 5 parts, 10 parts, 15 parts, 20 parts, or 25 parts. It can be understood that the parts by mass of thermoplastic polyurethane can also be other suitable choices within the range of 5 to 25 parts.

[0034] Fumed silica has a small particle size, a large specific surface area, strong surface adsorption ability, and good dispersibility. Therefore, it can play a good reinforcing role. Optionally, the parts by mass of fumed silica are 1 part, 5 parts, 10 parts, 15 parts, 20 parts, 25 parts, or 30 parts. It can be understood that the parts by mass of fumed silica can also be other suitable choices within the range of 1 to 30 parts.

[0035] Optionally, the mass parts of the filler are 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts or 50 parts. It can be understood that other suitable selections can also be made for the mass parts of the filler within the range of 10 to 50 parts.

[0036] Optionally, the mass parts of the anti-aging agent are 1 part, 2 parts, 4 parts, 6 parts, 8 parts or 10 parts. The mass parts of the color powder are 1 part, 2 parts, 4 parts, 6 parts, 8 parts or 10 parts. The mass parts of the vulcanizing agent are 1 part, 2 parts, 3 parts, 4 parts or 5 parts. The mass parts of the accelerator are 1 part, 2 parts, 3 parts, 4 parts, 5 parts or 6 parts. The mass parts of the softening agent are 1 part, 5 parts, 10 parts, 15 parts or 20 parts.

[0037] The above-mentioned plastic composition uses styrene-butadiene rubber, natural rubber, thermoplastic polyurethane and filler as the main components, and compound functional additives such as fumed silica, anti-aging agent, color powder and vulcanizing agent, and prepares a plastic composition with better strength, wear resistance and shock absorption performance by regulating the ratio between the components. Specifically, thermoplastic polyurethane with a relatively large cohesive energy is added to the traditional styrene-butadiene rubber and natural rubber system to improve the tensile strength, wear resistance and rebound performance of the plastic composition; secondly, styrene-butadiene rubber, natural rubber and thermoplastic polyurethane are compounded according to a specific ratio to make the three have better compatibility and improve the comprehensive performance of the product; finally, fumed silica with good reinforcing and dispersing properties is added to further improve the strength of the product.

[0038] In some of the embodiments, the components include the following mass parts: 10 to 25 parts of styrene-butadiene rubber, 10 to 20 parts of natural rubber, 10 to 20 parts of thermoplastic polyurethane, 15 to 40 parts of filler, 1 to 10 parts of fumed silica, 1 to 5 parts of anti-aging agent, 1 to 10 parts of color powder, 1 to 3 parts of vulcanizing agent, 1 to 4 parts of accelerator and 1 to 20 parts of softening agent. The plastic composition obtained according to the above component ratio can better exert the synergistic effect of styrene-butadiene rubber, natural rubber and thermoplastic polyurethane, and compound functional additives such as filler, fumed silica, anti-aging agent and color powder to further improve the comprehensive performance of the product.

[0039] In some of the embodiments, the plastic composition consists of the components in the above mass parts.

[0040] In some of the embodiments, the mass ratio of styrene-butadiene rubber, natural rubber and thermoplastic polyurethane is (1 to 2.5):(1 to 2):(1 to 2.5). When within this ratio range, the compatibility of styrene-butadiene rubber, natural rubber and thermoplastic polyurethane can be better, and the synergistic effect of the three can be exerted more fully, and the strength, wear resistance and shock absorption performance of the obtained plastic composition are better.

[0041] Optionally, the mass ratio of styrene-butadiene rubber, natural rubber, and thermoplastic polyurethane is 1:1:1, 1.5:1:1, 2:1:1, 2.5:1:1, 1:1.5:1, 1:2:1, 1:1:1.5, 1:1:2, 2.5:2:2, or 1:1:2.5. It can be understood that other suitable selections can also be made for the mass ratio of the three within the range of (1-2.5):(1-2):(1-2).

[0042] In some of the embodiments, the thermoplastic polyurethane includes polybutadiene-based polyurethane. Since the structure of the carbon-carbon bonds contained in polybutadiene is relatively similar to the structures of styrene-butadiene rubber and natural rubber, polybutadiene has good compatibility with the styrene-butadiene rubber and natural rubber in the raw materials. Therefore, it can be vulcanized together with the above two rubbers to produce products with better shock absorption performance and wear resistance.

[0043] In some of the embodiments, the polybutadiene-based polyurethane is a commercially available polybutadiene-based polyurethane.

[0044] In some of the embodiments, the raw materials for preparing the polybutadiene-based polyurethane include the following components in parts by mass: 50-90 parts of hydroxyl-terminated polybutadiene, 5-20 parts of 1,4-butanediol, and 30-60 parts of diphenylmethane diisocyanate. The polybutadiene-based polyurethane prepared according to the above raw material ratio not only has good strength performance and wear resistance, but also has good elasticity.

[0045] In some of the embodiments, the polybutadiene-based polyurethane is made from the above raw materials in parts by mass.

[0046] In some of the embodiments, the filler includes calcium carbonate with a particle size of 1000-15000 mesh. Compared with traditional calcium carbonate, the above calcium carbonate has a smaller particle size, better compatibility, and better physical properties, thereby improving the strength performance of the product.

[0047] In some of the embodiments, the filler includes nano calcium carbonate.

[0048] In some of the embodiments, the mass ratio of the thermoplastic polyurethane to fumed silica is (1-4):1. When within this ratio range, the thermoplastic polyurethane and fumed silica can give full play to their synergistic effect, and the mechanical strength of the product is better.

[0049] Optionally, the mass ratio of the thermoplastic polyurethane to fumed silica is 1:1, 1.5:1, 2:1, 2.5:1, 3:1, 3.5:1, or 4:1. It can be understood that other suitable selections can also be made for the mass ratio of the two within the range of (1-4):1.

[0050] In some of the embodiments, the anti-aging agent includes 2,6-di-tert-butyl-p-cresol.

[0051] In some of these embodiments, the toner includes at least one of iron oxide red and light fast scarlet.

[0052] In some of these embodiments, the vulcanizing agent includes sulfur.

[0053] In some of these embodiments, the accelerator includes at least one of accelerator TMTD and accelerator H.

[0054] In some of these embodiments, the softening agent includes at least one of naphthenic oil and mineral oil.

[0055] Furthermore, an embodiment of the present application provides a plastic composite material, the preparation raw materials of which include the above-mentioned plastic composition.

[0056] In some of these embodiments, the preparation method of the above-mentioned plastic composite material includes the following steps:

[0057] Mix styrene-butadiene rubber, natural rubber, thermoplastic polyurethane, filler, fumed silica, anti-aging agent, toner and softening agent to obtain a first rubber compound.

[0058] Mill the first rubber compound to obtain a second rubber compound.

[0059] Mix the second rubber compound with a vulcanizing agent and an accelerator and vulcanize to obtain a plastic composite material.

[0060] Even further, an embodiment of the present application provides an application of the above-mentioned plastic composition or plastic composite material in the preparation of a prefabricated plastic runway.

[0061] In addition, an embodiment of the present application provides a prefabricated plastic runway, the preparation raw materials of which include the above-mentioned plastic composition or plastic composite material.

[0062] Finally, an embodiment of the present application provides a preparation method of the above-mentioned prefabricated plastic runway, including steps S10 to S30.

[0063] S10. Mix styrene-butadiene rubber, natural rubber, thermoplastic polyurethane, filler, fumed silica, anti-aging agent, toner and softening agent to obtain a rubber compound.

[0064] S20. Mill and calender the rubber compound to obtain a sheet-shaped rubber compound.

[0065] S30. Mix the sheet-shaped rubber compound with a vulcanizing agent and an accelerator and vulcanize, and then calender.

[0066] The prefabricated plastic runway prepared by the above preparation method has good strength, wear resistance and shock absorption performance, and can be directly paved into a single-layer plastic runway. Compared with the traditional double-layer prefabricated runway, the preparation process is simple, the production efficiency is high, and it is suitable for large-scale promotion.

[0067] In some of the embodiments, in step S10, styrene-butadiene rubber, natural rubber, thermoplastic polyurethane, filler, fumed silica, anti-aging agent, color powder and softening agent are mixed by kneading. The temperature of kneading is 120 to 190 °C, and the time of kneading is 10 to 50 min.

[0068] In some of the embodiments, after obtaining the sheet-shaped rubber compound in step S20, the temperature is reduced to below 60±2 °C.

[0069] In some of the embodiments, in step S30, the sheet-shaped rubber compound is mixed and vulcanized with a vulcanizing agent and an accelerator by kneading.

[0070] In some of the embodiments, the vulcanization temperature in step S30 is 130 to 190 °C, and the vulcanization time is 10 to 40 min.

[0071] In some of the embodiments, the preparation method of the thermoplastic polyurethane in step S10 includes the following steps:

[0072] S101. Mix hydroxyl-terminated polybutadiene and diphenylmethane diisocyanate, and heat to prepare a prepolymer.

[0073] S102. Add 1,4-butanediol to the prepolymer to prepare thermoplastic polyurethane.

[0074] In some of the embodiments, step S101 includes the following steps: First, vacuum-dehydrate hydroxyl-terminated polybutadiene, and then add diphenylmethane diisocyanate and heat for a polymerization reaction.

[0075] In some of the embodiments, the temperature of vacuum dehydration is 90 to 120 °C, and the time is 1.5 to 3 hours.

[0076] In some of the embodiments, after vacuum dehydration, the temperature is reduced to 55 to 65 °C, and then the vacuum is removed and diphenylmethane diisocyanate is added.

[0077] In some of the embodiments, the temperature of the polymerization reaction is 80 to 85 °C, and the time is 2 to 3 hours.

[0078] In some of the embodiments, step S102 includes the following steps: Mix the prepolymer and 1,4-butanediol, stir evenly, then pour into a mold, vulcanize at 90 to 120 °C for 10 to 30 minutes, and then cure at 70 to 85 °C for 8 to 12 hours.

[0079] The following are specific embodiments.

[0080] Example 1

[0081] (1) Preparation of thermoplastic polyurethane

[0082] By mass, the thermoplastic polyurethane is prepared from the following raw material components: 80 parts of hydroxyl-terminated polybutadiene (number average molecular weight of 4000 g / mol, Qilong Chemical Co., Ltd., Zibo, China), 58 parts of diphenylmethane diisocyanate, and 18 parts of 1,4-butanediol. The specific preparation method is as follows:

[0083] The hydroxyl-terminated polybutadiene is dehydrated under vacuum at 100 °C for 2 hours; the temperature is lowered to 60 °C and the vacuum is removed, then diphenylmethane diisocyanate (MDI) is added and rapidly stirred until the temperature is stable; the temperature is raised to 80 °C and reacted for 2 hours to obtain a prepolymer; 1,4-butanediol is added, rapidly stirred evenly, and poured into a preheated mold coated with a release agent; the mold containing the above materials is placed in a flat vulcanizer at 100 °C for vulcanization for 15 minutes, taken out and cured at 80 °C for 10 hours, and then demolded to obtain polybutadiene-based polyurethane. Among them, the R value (i.e., the molar ratio of isocyanate group to hydroxyl group) of the obtained polybutadiene-based polyurethane is 1.05.

[0084] (2) Preparation of prefabricated plastic runway

[0085] By mass, the prefabricated plastic runway is prepared from the following raw material components: 25 parts of styrene-butadiene rubber, 15 parts of natural rubber, 15 parts of the prepared polybutadiene-based polyurethane, 30 parts of calcium carbonate (1250 mesh), 5 parts of fumed silica, 2 parts of 2,6-di-tert-butyl-p-cresol (BHT), 3 parts of iron oxide red, 1.5 parts of sulfur, 1.6 parts of accelerator TMTD, 1 part of accelerator H, and 5 parts of mineral oil. The specific preparation method is as follows:

[0086] The styrene-butadiene rubber, natural rubber, polybutadiene-based polyurethane, calcium carbonate, fumed silica, mineral oil, 2,6-di-tert-butyl-p-cresol, and iron oxide red are mixed, and then put into a rubber internal mixer and kneaded for 13 - 17 minutes to obtain a rubber compound.

[0087] The above rubber compound is put into a calender for calendering to obtain a sheet-shaped rubber compound, and then cooled to a temperature lower than 60 ± 2 °C.

[0088] The cooled sheet-shaped rubber compound, sulfur, accelerator TMTD, and accelerator H are put into a rubber internal mixer and kneaded for 2.5 - 3.5 minutes. Then it is placed in a calendering device for continuous calendering treatment to obtain a prefabricated plastic runway with patterns.

[0089] Example 2

[0090] The preparation method of Example 2 is basically the same as that of Example 1, except that the prefabricated plastic runway is prepared from the following raw materials: 25 parts of styrene-butadiene rubber, 15 parts of natural rubber, 25 parts of prepared polybutadiene-type polyurethane, 30 parts of calcium carbonate, 5 parts of fumed silica, 2 parts of 2,6-di-tert-butyl-p-cresol (BHT), 3 parts of iron oxide red, 1.5 parts of sulfur, 1.6 parts of accelerator TMTD, 1 part of accelerator H and 5 parts of mineral oil.

[0091] Example 3

[0092] The preparation method of Example 3 is basically the same as that of Example 1, except that the prefabricated plastic runway is prepared from the following raw materials: 25 parts of styrene-butadiene rubber, 15 parts of natural rubber, 13 parts of prepared polybutadiene-type polyurethane, 30 parts of calcium carbonate, 5 parts of fumed silica, 2 parts of 2,6-di-tert-butyl-p-cresol (BHT), 3 parts of iron oxide red, 1.5 parts of sulfur, 1.6 parts of accelerator TMTD, 1 part of accelerator H and 5 parts of mineral oil.

[0093] Example 4

[0094] The preparation method of Example 4 is basically the same as that of Example 1, except that polyether-type polyurethane is used instead of polybutadiene-type polyurethane.

[0095] Example 5

[0096] The preparation method of Example 5 is basically the same as that of Example 1, except that calcium carbonate with a mesh number of 800 is used instead of the 1250-mesh calcium carbonate in Example 1.

[0097] Comparative Example 1

[0098] The preparation method of Comparative Example 1 is basically the same as that of Example 1, except that 7.5 parts of styrene-butadiene rubber and 7.5 parts of natural rubber are used instead of 15 parts of polybutadiene-type polyurethane. That is, the prefabricated plastic runway is prepared from the following raw materials: 32.5 parts of styrene-butadiene rubber, 22.5 parts of natural rubber, 30 parts of calcium carbonate, 5 parts of fumed silica, 2 parts of 2,6-di-tert-butyl-p-cresol (BHT), 3 parts of iron oxide red, 1.5 parts of sulfur, 1.6 parts of accelerator TMTD, 1 part of accelerator H and 5 parts of mineral oil.

[0099] Comparative Example 2

[0100] The preparation method of Comparative Example 2 is basically the same as that of Example 1, except that fumed silica is not added to the raw materials.

[0101] Comparative Example 3

[0102] The preparation method of Comparative Example 3 was basically the same as that of Example 1, except that the prefabricated plastic runway was prepared from the following raw materials: 25 parts of styrene-butadiene rubber, 15 parts of natural rubber, 2 parts of the prepared polybutadiene-type polyurethane, 30 parts of calcium carbonate, 5 parts of fumed silica, 2 parts of 2,6-di-tert-butyl-p-cresol (BHT), 3 parts of iron oxide red, 1.5 parts of sulfur, 1.6 parts of accelerator TMTD, 1 part of accelerator H, and 5 parts of mineral oil.

[0103] Comparative Example 4

[0104] The preparation method of Comparative Example 4 was basically the same as that of Example 1, except that the prefabricated plastic runway was prepared from the following raw materials: 25 parts of styrene-butadiene rubber, 15 parts of natural rubber, 40 parts of the prepared polybutadiene-type polyurethane, 30 parts of calcium carbonate, 5 parts of fumed silica, 2 parts of 2,6-di-tert-butyl-p-cresol (BHT), 3 parts of iron oxide red, 1.5 parts of sulfur, 1.6 parts of accelerator TMTD, 1 part of accelerator H, and 5 parts of mineral oil.

[0105] The prefabricated plastic runways prepared in Examples 1 to 5 and Comparative Examples 1 to 4 were subjected to performance tests, and the test results are shown in Table 1 below. Among them, the tensile strength and elongation at break were carried out according to the standard of GB 36246-2018, and the abrasion resistance was carried out according to the standard of GB / T1768-1979.

[0106] Table 1

[0107]

[0108] In Table 1, the larger the elongation at break, the better the shock absorption performance. From the test results in Table 1, it can be seen that the tensile strength and elongation at break of Examples 1 to 5 were relatively high, and the wear mass was relatively small, indicating that their strength, shock absorption performance, and abrasion resistance were relatively good. Among them, compared with Example 1, in Comparative Example 2 with a larger amount of thermoplastic polyurethane, the tensile strength and elongation at break decreased instead. This is because in the system of Comparative Example 2, the compatibility between the thermoplastic polyurethane and other components decreased, thereby affecting the strength performance of the product; the mass ratio of styrene-butadiene rubber, natural rubber, and thermoplastic polyurethane in Example 3 was 1.67:1:0.87, and its performance decreased compared with Example 1; Example 4 used polyether-type polyurethane, and Example 5 used 800-mesh calcium carbonate, and their performance decreased compared with Example 1.

[0109] The tensile strength of Comparative Example 1 was only 0.71 MPa, the elongation at break was 170%, and the wear mass was 0.0152 g, which were significantly lower than those of Example 1, indicating that thermoplastic polyurethane can improve the strength, impact absorption performance and wear resistance of products. Further, for Comparative Example 3 with insufficient thermoplastic polyurethane and Comparative Example 4 with excessive thermoplastic polyurethane, their performances were significantly reduced, indicating that adding an appropriate amount of thermoplastic polyurethane and cooperating with appropriate amounts of components such as styrene-butadiene rubber and natural rubber can improve the comprehensive performance of products. In addition, by comparing Comparative Example 2 and Example 1, it can be seen that adding an appropriate amount of fumed silica can further improve the strength performance of products.

[0110] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0111] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A plastic composition, characterized in that, It comprises components in the following parts by mass: 5 - 30 parts of styrene-butadiene rubber, 5 - 25 parts of natural rubber, 15 - 20 parts of thermoplastic polyurethane, 10 - 50 parts of filler, 1 - 30 parts of fumed silica, 1 - 10 parts of anti-aging agent, 1 - 10 parts of color powder, 1 - 5 parts of vulcanizing agent, 1 - 6 parts of accelerator and 1 - 20 parts of softening agent; The thermoplastic polyurethane comprises polybutadiene-based polyurethane, and the raw materials for preparing the polybutadiene-based polyurethane comprise components in the following parts by mass: 50 - 90 parts of hydroxyl-terminated polybutadiene, 5 - 20 parts of 1,4-butanediol and 30 - 60 parts of diphenylmethane diisocyanate; The filler comprises calcium carbonate with a particle size of 1000 - 15000 meshes, and the mass ratio of the styrene-butadiene rubber, the natural rubber and the thermoplastic polyurethane is (1 - 2.5):(1 - 2):(1 - 2.5).

2. The plastic composition according to claim 1, wherein, It comprises components in the following parts by mass: 10 - 25 parts of styrene-butadiene rubber, 10 - 20 parts of natural rubber, 15 - 20 parts of thermoplastic polyurethane, 15 - 40 parts of filler, 1 - 10 parts of fumed silica, 1 - 5 parts of anti-aging agent, 1 - 10 parts of color powder, 1 - 3 parts of vulcanizing agent, 1 - 4 parts of accelerator and 1 - 20 parts of softening agent.

3. The plastic composition according to any one of claims 1 to 2, characterized in that, The anti-aging agent comprises 2,6-di-tert-butyl-p-cresol.

4. The plastic composition according to any one of claims 1 to 2, characterized in that The color powder comprises at least one of iron red and lightfast scarlet.

5. The plastic composition according to any one of claims 1 to 2, characterized in that, The vulcanizing agent comprises sulfur.

6. The plastic composition according to any one of claims 1 to 2, characterized in that, The accelerator comprises at least one of accelerator TMTD and accelerator H.

7. The plastic composition according to any one of claims 1 to 2, characterized in that The softening agent comprises at least one of naphthenic oil and mineral oil.

8. A plastic composite material, characterized in that, Its raw materials for preparation comprise the plastic composition according to any one of claims 1 - 7.

9. A prefabricated plastic runway, characterized in that, Its raw materials for preparation comprise the plastic composition according to any one of claims 1 - 7 or the plastic composite material according to claim 8.

10. A preparation method of the prefabricated plastic runway according to claim 9, characterized in that, It comprises the following steps: Mix the styrene-butadiene rubber, natural rubber, thermoplastic polyurethane, filler, fumed silica, anti-aging agent, color powder and softening agent to obtain a rubber compound; Open mill and calender the rubber compound to obtain a sheet-shaped rubber compound; Mix the sheet-shaped rubber compound with the vulcanizing agent and the accelerator and carry out vulcanization, and then carry out calendering to obtain a prefabricated plastic runway; Among them, the preparation method of the thermoplastic polyurethane comprises the following steps: Mix hydroxyl-terminated polybutadiene and diphenylmethane diisocyanate and heat to prepare a prepolymer; Add 1,4-butanediol to the prepolymer to prepare the thermoplastic polyurethane.

Images