High impact resistant flame-retardant modified plastic material and its preparation method
By introducing flame retardant modifiers and silane coupling agents into polycarbonate, the interfacial bonding force of nylon resin is enhanced, solving the compatibility and flame retardant migration problems of nylon resin and polycarbonate blends, and improving the toughness and mechanical properties of the materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENZHEN DAYI NEW MATERIAL TECHNOLOGY CO LTD
- Filing Date
- 2026-04-24
- Publication Date
- 2026-06-16
AI Technical Summary
Nylon resin and polycarbonate blends suffer from poor compatibility, flame retardant migration and precipitation issues, which affect the mechanical properties and durability of the materials.
A flame-retardant modifier was used to modify polycarbonate during the melt transesterification stage. Combined with silane coupling agents and glass fibers, the interfacial bonding was enhanced, and a flame-retardant modified plastic material with high impact resistance was prepared.
It improves the compatibility between polycarbonate and nylon resin, solves the problem of flame retardant migration, and enhances the toughness and mechanical properties of the material.
Smart Images
Figure SMS_1 
Figure SMS_2 
Figure SMS_3
Abstract
Description
Technical Field
[0001] This invention belongs to the field of plastic materials technology, specifically relating to a high-impact flame-retardant modified plastic material and its preparation method. Background Technology
[0002] Nylon (PA, such as PA6 and PA66) resin is widely used in the automotive, electronics, and biomimetic materials industries due to its excellent mechanical strength, abrasion resistance, and chemical resistance. However, the inherent low-temperature brittleness and insufficient impact resistance of nylon resin limit its application in scenarios requiring high toughness. To improve its toughness, it is often blended with polycarbonate (PC), which has excellent room-temperature and low-temperature toughness, to prepare PA / PC alloys. However, PA and PC have significant differences in polarity and are thermodynamically incompatible. Simple physical blending can lead to severe phase separation and fragile interfaces, which not only fails to achieve toughening but may even damage the original mechanical properties of the material.
[0003] To improve the compatibility of PA / PC alloys, existing technologies typically employ compatibilizers (such as maleic anhydride grafts) or reactive compatibilizers to enhance the interfacial bonding between the two phases. However, engineering applications demand multi-dimensional material requirements. Besides high toughness, high flame retardancy is also a mandatory safety requirement in fields such as electronics, electrical engineering, and new energy vehicle components. Therefore, the industry commonly uses the method of directly adding small-molecule or polymeric flame retardants to the blend system to impart flame retardancy. However, added flame retardants, especially small-molecule flame retardants, are prone to migration and precipitation during long-term use or thermal aging, leading to a decline in the durability of flame retardant performance and potential contamination of contact parts. Secondly, these flame retardants, as physically dispersed third phases, have varying compatibility with PA and PC matrices, making it difficult to control their dispersion uniformity. Agglomerated flame retardant particles can become stress concentration points, severely degrading the mechanical properties of the material. Furthermore, the introduction of flame retardants may interfere with the role of compatibilizers at the PA / PC two-phase interface, further worsening the interface condition. To address these technical deficiencies, this invention provides a high-impact flame-retardant modified plastic material and its preparation method. Summary of the Invention
[0004] The purpose of this invention is to provide a high-impact, flame-retardant modified plastic material and its preparation method, in order to solve the problems mentioned in the background art.
[0005] The objective of this invention can be achieved through the following technical solutions: A high-impact, flame-retardant modified plastic material comprises the following raw materials in parts by weight: 30-40 parts nylon resin, 20-30 parts flame-retardant modified polycarbonate, 3-4 parts secondary flame retardant, 4-8 parts glass fiber, 0.4-0.8 parts silane coupling agent, 0.2-0.6 parts lubricant, and 0.3-0.8 parts hindered phenolic antioxidant; Furthermore, the nylon resin is at least one of nylon 6 resin and nylon 66 resin.
[0006] Furthermore, the secondary flame retardant is zinc borate.
[0007] Furthermore, the silane coupling agent is one of silane coupling agent KH-550 and silane coupling agent KH-560.
[0008] Furthermore, the lubricant is one of ethylene bis-stearamide and oleamide.
[0009] Further, the flame-retardant modified polycarbonate comprises the following raw materials in parts by weight: 40-50 parts bisphenol A, 6-8 parts flame-retardant modifier, 42-52 parts diphenyl carbonate, 0.002-0.01 parts catalyst, 0.5-0.15 parts phosphite antioxidant, and 1.5-2.5 parts p-tert-butylphenol.
[0010] Furthermore, the catalyst is at least one of lithium acetate, potassium acetate, and tetramethylammonium hydroxide.
[0011] Furthermore, the flame retardant modifier can be prepared by the following steps: S1. A bromination reaction occurs at the benzyl position of 4-acetyl-3-methylphenol to obtain a flame retardant precursor;
[0012] S2. The flame retardant precursor is reacted with trimethyl phosphite in an Arbuzov reaction to obtain a reactive flame retardant.
[0013] S3. A reactive flame retardant is obtained by reacting a reactive flame retardant with 6-aminohexanamide and phenol via a Mannich reaction.
[0014]
[0015] Furthermore, the flame-retardant modified polycarbonate is prepared by melt transesterification.
[0016] Furthermore, the melt transesterification method is as follows: Bisphenol A, flame retardant modifier, diphenyl carbonate, catalyst, and phosphite antioxidant were mixed in a reactor under nitrogen protection. The mixture was reacted at atmospheric pressure and temperature of 180–200°C for 1–2 hours. The system temperature was then raised to 220–240°C and reacted at this temperature for 1–2 hours to complete prepolymerization. During this process, a vacuum was continuously applied and the pressure inside the reactor was set to 10–20 kPa. The system temperature was then raised to 260–280°C and the system pressure was reduced to below 100 Pa. The mixture was reacted at this temperature for 2–3 hours to complete polycondensation. Then, p-tert-butylphenol was added to the system. The temperature and vacuum conditions were kept constant and the reaction was continued for 5–10 minutes to complete end-capping. The reaction was then stopped and the pressure was restored to atmospheric pressure. The product was extruded, water-cooled, pelletized, and dried to obtain flame-retardant modified polycarbonate.
[0017] The present invention also provides a method for preparing the high impact resistance and flame retardant modified plastic material.
[0018] A method for preparing a high-impact, flame-retardant modified plastic material includes the following steps: High-impact flame-retardant modified plastic material is obtained by mixing nylon resin, flame-retardant modified polycarbonate, secondary flame retardant, glass fiber, silane coupling agent, lubricant, and hindered phenolic antioxidant, and then melt-extruding the mixture at a temperature of 230–260°C.
[0019] In summary, the present invention has at least the following beneficial effects: This invention prepares a flame retardant modifier with a bisphenol structure, and uses this flame retardant modifier to modify polycarbonate in the melt transesterification stage to impart intrinsic flame retardant properties to polycarbonate. This effectively solves the migration problem of small molecule flame retardant components in composite materials and eliminates the influence of added flame retardants on the overall mechanical properties of composite materials.
[0020] This invention, by modifying polycarbonate with flame retardancy, not only effectively enhances the polarity of polycarbonate but also introduces a fatty amide structure with excellent compatibility with nylon resin into polycarbonate. This effectively solves the compatibility problem between low-grade polycarbonate and highly polar nylon resin, enhances the interfacial bonding force between flame-retardant modified polycarbonate and nylon resin, and effectively improves the modification effect of polycarbonate on nylon resin.
[0021] After flame-retardant modification of polycarbonate, the main matrix material nylon resin and flame-retardant modified polycarbonate in the composite material have strong polarity. The overall increase in polarity can not only solve the problem of poor dispersion of the organic part in the silane coupling agent in the weakly polar polycarbonate phase, but also improve the dipole interaction between the polar groups of the composite material and the organic part in the silane coupling agent, thereby improving the interfacial bonding force between glass fiber and polycarbonate, and enhancing the overall toughness and mechanical properties of the composite material. Detailed Implementation
[0022] This invention provides a high-impact, flame-retardant modified plastic material and its preparation method. Those skilled in the art can refer to the content of this document and appropriately modify the process parameters to achieve the same result. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and fall within the scope of this invention. The method and application of this invention have been described through preferred embodiments. Those skilled in the art can clearly modify or appropriately change and combine the method and application described herein without departing from the content, spirit, and scope of this invention to realize and apply the technology of this invention.
[0023] It should be understood that the expression “one or more of…” individually includes each of the objects described after the expression, as well as various different combinations of two or more of the described objects, unless otherwise understood from the context and usage. The expression “and / or” combined with three or more described objects should be understood to have the same meaning, unless otherwise understood from the context.
[0024] The terms “including,” “having,” or “containing,” including the use of their grammatical synonyms, should generally be understood as open-ended and non-restrictive, for example, not excluding other unstated elements or steps, unless otherwise specifically stated or understood from the context.
[0025] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural.
[0026] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items.
[0027] It should be understood that the order of the steps or the order in which certain actions are performed is not important as long as the invention remains operational. Furthermore, two or more steps or actions can be performed simultaneously.
[0028] The use of any and all instances or exemplary language such as “e.g.” or “including” in this document is merely intended to better illustrate the invention and is not intended to limit the scope of the invention unless the claims are made. No language in this specification should be construed as indicating that any unclaimed element is essential to the practice of the invention.
[0029] Furthermore, the numerical ranges and parameters used to define the present invention are approximate values, and the relevant values in the specific embodiments have been presented as precisely as possible. However, any value inevitably contains standard deviations due to individual test methods. Therefore, unless explicitly stated otherwise, it should be understood that all ranges, quantities, values, and percentages used in this disclosure are modified with the word "approximately". Here, "approximately" generally means that the actual value is within plus or minus 10%, 5%, 1%, or 0.5% of a specific value or range.
[0030] It should be understood that in the various embodiments of this application, the order of the above processes does not imply the order of execution. Some or all steps may be executed in parallel or sequentially. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.
[0031] The embodiments and comparative examples of this invention describe some examples, in which the embodiments illustrate certain implementations of the invention. However, this does not mean that the effects of the invention can only be achieved in these examples.
[0032] To further illustrate the present invention, the following describes in detail, with reference to embodiments, a high-impact flame-retardant modified plastic material and its preparation method provided by the present invention. Example
[0033] A high-impact flame-retardant modified plastic material comprises the following raw materials in parts by weight: 30 parts nylon resin, 20 parts flame-retardant modified polycarbonate, 3 parts secondary flame retardant, 4 parts glass fiber, 0.4 parts silane coupling agent, 0.2 parts lubricant, and 0.3 parts hindered phenolic antioxidant; In this embodiment, the nylon resin used is nylon 6 resin, the secondary flame retardant used is zinc borate, the silane coupling agent used is KH-550, the lubricant used is ethylene bis-stearamide, the hindered phenolic antioxidant used is antioxidant 1010, and the flame-retardant modified polycarbonate used is prepared by the following steps: By mass percentage, 40 parts of bisphenol A, 6 parts of flame retardant modifier, 42 parts of diphenyl carbonate, 0.002 parts of catalyst, and 0.5 parts of phosphite antioxidant were mixed in a reactor under nitrogen protection. The mixture was reacted at atmospheric pressure and 180°C for 2 hours. Then, the system temperature was raised to 220°C and reacted at this temperature for 2 hours to complete the prepolymerization. During this process, a vacuum was continuously applied and the pressure inside the reactor was set to 20 kPa. The system temperature was then raised to 260°C and the system pressure was reduced to 90 Pa. The mixture was reacted at this temperature for 3 hours to complete the polycondensation. Then, 1.5 parts of p-tert-butylphenol were added to the system. The temperature and vacuum conditions were kept constant and the reaction was continued for 10 minutes to complete the end-capping. The reaction was then stopped and the pressure was restored to atmospheric pressure. The product was extruded, water-cooled, pelletized, and dried to obtain flame-retardant modified polycarbonate.
[0034] The catalyst used is lithium acetate, the phosphite antioxidant used is antioxidant 168, and the flame retardant modifier used is prepared by the following steps: S1. By mass, 5.4 parts of 4-acetyl-3-methylphenol, 6.4 parts of N-bromosuccinimide, 2.4 parts of azobisisobutyronitrile, and 42 parts of acetonitrile were mixed in a container and reacted at 60°C for 14 hours. After the reaction was completed, the solvent was removed by rotary evaporation of the reaction solution. The remaining solid was washed with deionized water and dried, and then recrystallized with anhydrous ethanol to obtain the flame retardant precursor. S2. By mass, 6 parts of flame retardant precursor, 3.6 parts of trimethyl phosphite, 1.6 parts of zinc iodide, and 30 parts of dimethyl sulfoxide are mixed in a container and reacted at 80°C for 16 hours. After the reaction is completed, the reaction solution is poured into deionized water to precipitate. The precipitate is filtered to separate the precipitate, washed with deionized water, and dried to obtain the reactive flame retardant. S3. By mass, 4.8 parts of reactive flame retardant, 2.5 parts of 6-aminohexanamide, 5.4 parts of phenol, 0.08 parts of p-toluenesulfonic acid, and 36 parts of dimethyl sulfoxide are mixed in a reaction vessel and reacted at 120°C for 18 hours. After the reaction is completed, the reaction solution is poured into deionized water to precipitate. After filtering and separating the precipitate, the obtained precipitate is washed with deionized water and dried to obtain the flame retardant modifier.
[0035] A method for preparing a high-impact, flame-retardant modified plastic material includes the following steps: A high-impact flame-retardant modified plastic material is obtained by mixing nylon resin, flame-retardant modified polycarbonate, secondary flame retardant, glass fiber, silane coupling agent, lubricant, and hindered phenolic antioxidant and then melt-extruding the mixture at a temperature of 230°C. Example
[0036] A high-impact flame-retardant modified plastic material comprises the following raw materials in parts by weight: 35 parts nylon resin, 25 parts flame-retardant modified polycarbonate, 3.5 parts secondary flame retardant, 6 parts glass fiber, 0.6 parts silane coupling agent, 0.4 parts lubricant, and 0.55 parts hindered phenolic antioxidant; In this embodiment, the nylon resin used is nylon 66 resin, the secondary flame retardant used is zinc borate, the silane coupling agent used is KH-560, the lubricant used is ethylene bis-stearamide, the hindered phenolic antioxidant used is antioxidant 1035, and the flame-retardant modified polycarbonate used is prepared by the following steps: By mass, 45 parts of bisphenol A, 7 parts of flame retardant modifier, 47 parts of diphenyl carbonate, 0.006 parts of catalyst, and 1 part of phosphite antioxidant were mixed in a reactor under nitrogen protection. The mixture was reacted at atmospheric pressure and 190°C for 1.5 hours. Then, the system temperature was raised to 230°C and reacted at this temperature for another 1.5 hours to complete the prepolymerization. During this process, a vacuum was continuously applied and the pressure inside the reactor was set to 15 kPa. The system temperature was then raised to 270°C and the system pressure was reduced to 80 Pa. The mixture was reacted at this temperature for 2.5 hours to complete the polycondensation. Then, 2 parts of p-tert-butylphenol were added to the system. The temperature and vacuum conditions were kept constant and the reaction was continued for 7.5 minutes to complete the end-capping. The reaction was then stopped and the pressure was restored to atmospheric pressure. The product was extruded, water-cooled, pelletized, and dried to obtain flame-retardant modified polycarbonate.
[0037] The catalyst used is potassium acetate, the phosphite antioxidant used is antioxidant 168, and the flame retardant modifier used is prepared by the following steps: S1. By mass, 6.3 parts of 4-acetyl-3-methylphenol, 7.5 parts of N-bromosuccinimide, 2.8 parts of azobisisobutyronitrile, and 49 parts of acetonitrile were mixed in a container and reacted at 65°C for 11 hours. After the reaction was completed, the solvent was removed by rotary evaporation of the reaction solution. The remaining solid was washed with deionized water and dried, and then recrystallized with anhydrous ethanol to obtain the flame retardant precursor. S2. By mass, 7 parts of flame retardant precursor, 4.2 parts of trimethyl phosphite, 1.9 parts of zinc iodide, and 35 parts of dimethyl sulfoxide are mixed in a container and reacted at 90°C for 12 hours. After the reaction is completed, the reaction solution is poured into deionized water to precipitate. The precipitate is filtered to separate the precipitate, washed with deionized water, and dried to obtain the reactive flame retardant. S3. By mass, 56 parts of reactive flame retardant, 2.9 parts of 6-aminohexanamide, 6.3 parts of phenol, 0.1 parts of p-toluenesulfonic acid, and 42 parts of dimethyl sulfoxide are mixed in a reaction vessel and reacted at 130°C for 14 hours. After the reaction is completed, the reaction solution is poured into deionized water to precipitate. After filtering and separating the precipitate, the obtained precipitate is washed with deionized water and dried to obtain the flame retardant modifier.
[0038] A method for preparing a high-impact, flame-retardant modified plastic material includes the following steps: A high-impact flame-retardant modified plastic material is obtained by mixing nylon resin, flame-retardant modified polycarbonate, secondary flame retardant, glass fiber, silane coupling agent, lubricant, and hindered phenolic antioxidant and then melt-extruding the mixture at a temperature of 245°C. Example
[0039] A high-impact flame-retardant modified plastic material comprises the following raw materials in parts by weight: 40 parts nylon resin, 30 parts flame-retardant modified polycarbonate, 4 parts secondary flame retardant, 8 parts glass fiber, 0.8 parts silane coupling agent, 0.6 parts lubricant, and 0.8 parts hindered phenolic antioxidant; In this embodiment, the nylon resin used is nylon 66 resin, the secondary flame retardant used is zinc borate, the silane coupling agent used is KH-550, the lubricant used is oleic amide, the hindered phenolic antioxidant used is antioxidant 1076, and the flame-retardant modified polycarbonate used is prepared by the following steps: By mass percentage, 50 parts of bisphenol A, 8 parts of flame retardant modifier, 52 parts of diphenyl carbonate, 0.01 parts of catalyst, and 1.5 parts of phosphite antioxidant were mixed in a reactor under nitrogen protection. The mixture was reacted at atmospheric pressure and 200°C for 1 hour. Then, the system temperature was raised to 240°C and reacted at this temperature for 1 hour to complete prepolymerization. During this process, a vacuum was continuously applied and the pressure inside the reactor was set to 10 kPa. The system temperature was then raised to 280°C and the system pressure was reduced to 50 Pa. The mixture was reacted at this temperature for 2 hours to complete polycondensation. Then, 2.5 parts of p-tert-butylphenol were added to the system. The temperature and vacuum conditions were kept constant and the reaction was continued for 5 minutes to complete end-capping. The reaction was then stopped and the pressure was restored to atmospheric pressure. The product was extruded, water-cooled, pelletized, and dried to obtain flame-retardant modified polycarbonate.
[0040] The catalyst used is tetramethylammonium hydroxide, the phosphite antioxidant used is antioxidant 626, and the flame retardant modifier used is prepared by the following steps: S1. By mass, 7.2 parts of 4-acetyl-3-methylphenol, 8.6 parts of N-bromosuccinimide, 3.2 parts of azobisisobutyronitrile, and 56 parts of acetonitrile were mixed in a container and reacted at 70°C for 8 hours. After the reaction was completed, the solvent was removed by rotary evaporation of the reaction solution. The remaining solid was washed with deionized water and dried, and then recrystallized with anhydrous ethanol to obtain the flame retardant precursor. S2. By mass, 8 parts of flame retardant precursor, 4.8 parts of trimethyl phosphite, 2.2 parts of zinc iodide, and 40 parts of dimethyl sulfoxide are mixed in a container and reacted at 100°C for 8 hours. After the reaction is completed, the reaction solution is poured into deionized water to precipitate. The precipitate is filtered to separate the precipitate, washed with deionized water, and dried to obtain the reactive flame retardant. S3. By mass, 6.4 parts of reactive flame retardant, 3.3 parts of 6-aminohexanamide, 7.2 parts of phenol, 0.12 parts of p-toluenesulfonic acid, and 48 parts of dimethyl sulfoxide are mixed in a reaction vessel and reacted at 140℃ for 10 hours. After the reaction is completed, the reaction solution is poured into deionized water to precipitate. After filtering and separating the precipitate, the obtained precipitate is washed with deionized water and dried to obtain the flame retardant modifier.
[0041] A method for preparing a high-impact, flame-retardant modified plastic material includes the following steps: A high-impact flame-retardant modified plastic material is obtained by mixing nylon resin, flame-retardant modified polycarbonate, secondary flame retardant, glass fiber, silane coupling agent, lubricant, and hindered phenolic antioxidant and then melt-extruding the mixture at a temperature of 260°C.
[0042] Comparative Example 1 The difference between this comparative example and Example 3 is that the polycarbonate is not modified for flame retardancy; instead, an equal mass of unmodified commercially available bisphenol A polycarbonate is used to replace the flame-retardant modified polycarbonate in the raw materials.
[0043] A high-impact flame-retardant modified plastic material comprises the following raw materials in parts by weight: 40 parts nylon resin, 30 parts bisphenol A polycarbonate, 4 parts secondary flame retardant, 8 parts glass fiber, 0.8 parts silane coupling agent, 0.6 parts lubricant, and 0.8 parts hindered phenolic antioxidant; In this embodiment, the nylon resin used is nylon 66 resin, the secondary flame retardant used is zinc borate, the silane coupling agent used is KH-550, the lubricant used is oleic acid amide, and the hindered phenolic antioxidant used is antioxidant 1076.
[0044] A method for preparing a high-impact, flame-retardant modified plastic material includes the following steps: A high-impact flame-retardant modified plastic material is obtained by mixing nylon resin, bisphenol A polycarbonate, secondary flame retardant, glass fiber, silane coupling agent, lubricant, and hindered phenolic antioxidant and then melt-extruding the mixture at a temperature of 260°C.
[0045] Comparative Example 2 The difference between this comparative example and Example 3 is that the polycarbonate is not modified for flame retardancy. Instead, 4 parts of commercially available flame retardant DOPO and 26 parts of commercially available bisphenol A polycarbonate are used to replace 30 parts of flame-retardant modified polycarbonate in the raw materials.
[0046] A high-impact flame-retardant modified plastic material comprises the following raw materials in parts by weight: 40 parts nylon resin, 26 parts bisphenol A polycarbonate, 4 parts flame retardant DOPO, 4 parts secondary flame retardant, 8 parts glass fiber, 0.8 parts silane coupling agent, 0.6 parts lubricant, and 0.8 parts hindered phenolic antioxidant; In this embodiment, the nylon resin used is nylon 66 resin, the secondary flame retardant used is zinc borate, the silane coupling agent used is KH-550, the lubricant used is oleic acid amide, and the hindered phenolic antioxidant used is antioxidant 1076.
[0047] A method for preparing a high-impact, flame-retardant modified plastic material includes the following steps: A high-impact flame-retardant modified plastic material is obtained by mixing nylon resin, bisphenol A polycarbonate, flame retardant DOPO, secondary flame retardant, glass fiber, silane coupling agent, lubricant, and hindered phenolic antioxidant and then melt-extruding the mixture at a temperature of 260°C.
[0048] Experimental Example 1 The high-impact flame-retardant modified plastic materials obtained in Examples 1-3 and Comparative Examples 1-2 were subjected to performance tests. The tensile strength of each component sample was tested according to the national standard GB / T 1040.2-2022 "Determination of Tensile Properties of Plastics", the flexural strength of each component sample was tested according to the national standard GB / T 9341-2008 "Determination of Flexural Properties of Plastics", the impact strength of each component sample was tested according to the national standard GB / T 1043.1-2008 "Determination of Impact Properties of Simply Supported Beams of Plastics", and the flame retardancy rating of each component sample was tested according to the industry standard UL-94. The test results are shown in Table 1. Table 1
[0049] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.
Claims
1. A high-impact, flame-retardant modified plastic material, characterized in that, It contains the following raw materials: nylon resin, flame-retardant modified polycarbonate, secondary flame retardant, glass fiber, silane coupling agent, lubricant, and hindered phenolic antioxidant; The flame-retardant modified polycarbonate is prepared by bisphenol A, a flame-retardant modifier, and diphenyl carbonate via a melt transesterification method, and the flame-retardant modifier is prepared by the following steps: S1. A bromination reaction occurs at the benzyl position of 4-acetyl-3-methylphenol to obtain a flame retardant precursor; S2. The flame retardant precursor is reacted with trimethyl phosphite in an Arbuzov reaction to obtain a reactive flame retardant. S3. A reactive flame retardant is obtained by reacting a reactive flame retardant with 6-aminohexanamide and phenol via a Mannich reaction.
2. The high impact resistance and flame retardant modified plastic material according to claim 1, characterized in that, The raw materials contain the following parts by weight: 30-40 parts nylon resin, 20-30 parts flame-retardant modified polycarbonate, 3-4 parts secondary flame retardant, 4-8 parts glass fiber, 0.4-0.8 parts silane coupling agent, 0.2-0.6 parts lubricant, and 0.3-0.8 parts hindered phenolic antioxidant.
3. The high impact resistance and flame retardant modified plastic material according to claim 1, characterized in that, The nylon resin is at least one of nylon 6 resin and nylon 66 resin.
4. The high impact resistance and flame retardant modified plastic material according to claim 1, characterized in that, The secondary flame retardant is zinc borate.
5. The high impact resistance and flame retardant modified plastic material according to claim 1, characterized in that, The silane coupling agent is one of silane coupling agent KH-550 and silane coupling agent KH-560.
6. The high impact resistance and flame retardant modified plastic material according to claim 1, characterized in that, The lubricant is one of ethylene bis-stearamide and oleamide.
7. The high impact resistance and flame retardant modified plastic material according to claim 1, characterized in that, The flame-retardant modified polycarbonate comprises the following raw materials in parts by weight: 40-50 parts bisphenol A, 6-8 parts flame-retardant modifier, 42-52 parts diphenyl carbonate, 0.002-0.01 parts catalyst, 0.5-0.15 parts phosphite antioxidant, and 1.5-2.5 parts p-tert-butylphenol.
8. The high impact resistance and flame retardant modified plastic material according to claim 1, characterized in that, The catalyst is at least one of lithium acetate, potassium acetate, and tetramethylammonium hydroxide.
9. The method for preparing a high-impact flame-retardant modified plastic material according to claim 1, characterized in that, The melt transesterification method is as follows: Bisphenol A, flame retardant modifier, diphenyl carbonate, catalyst, and phosphite antioxidant are mixed in a reactor under nitrogen protection. The mixture is reacted at atmospheric pressure and temperature of 180–200°C for 1–2 hours. The system temperature is then raised to 220–240°C and reacted at this temperature for 1–2 hours to complete prepolymerization. During this process, a vacuum is continuously applied and the pressure inside the reactor is set to 10–20 kPa. The system temperature is then raised to 260–280°C and the system pressure is reduced to below 100 Pa. The mixture is reacted at this temperature for 2–3 hours to complete polycondensation. Then, p-tert-butylphenol is added to the system, and the temperature and vacuum conditions are kept constant. The reaction is continued for 5–10 minutes to complete the end-capping process, yielding flame-retardant modified polycarbonate.
10. A method for preparing a high-impact flame-retardant modified plastic material as described in any one of claims 1 to 9, characterized in that, Includes the following steps: High-impact flame-retardant modified plastic material is obtained by mixing nylon resin, flame-retardant modified polycarbonate, secondary flame retardant, glass fiber, silane coupling agent, lubricant, and hindered phenolic antioxidant, and then melt-extruding the mixture at a temperature of 230–260°C.