Kaolin-loaded zinc ferrite flame-retardant synergist capable of replacing antimony trioxide as well as preparation method and application of kaolin-loaded zinc ferrite flame-retardant synergist
By using kaolin-loaded zinc ferrite flame retardant synergist, the problem of high antimony trioxide price was solved, achieving low-cost and high-efficiency flame retardant effect, forming a protective char layer, and improving the flame retardant performance of polymer materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING UNIV OF CHEM TECH
- Filing Date
- 2026-03-18
- Publication Date
- 2026-05-12
AI Technical Summary
In the existing technology, antimony trioxide is expensive and in short supply, which leads to increased costs of flame retardant products, and some substitutes are insufficient in terms of substitution effect and overall mechanical properties.
A kaolin-loaded zinc ferrite flame retardant synergist was used, and zinc ferrite nanoparticles were loaded onto the surface and interlayer of kaolin through in-situ growth to form a layer-particle composite structure, which was then applied to polymer materials.
It significantly reduces the overall cost of flame-retardant materials, maintains excellent flame-retardant performance, and forms a dense and continuous protective char layer in polymer materials, effectively inhibiting heat transfer and the escape of combustible gases, thereby improving the flame-retardant effect of the materials.
Smart Images
Figure CN122011515A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of plastic additives technology, specifically to a kaolin-supported zinc ferrite flame retardant synergist that can replace antimony trioxide, its preparation method, and its application. Background Technology
[0002] Antimony trioxide (Sb₂O₃), commonly known as antimony white, is a white powdery inorganic compound with a melting point of 654 °C. Due to its unique properties and wide range of applications, antimony trioxide plays an irreplaceable role in many industrial sectors. However, its most well-known application is as a highly effective flame retardant synergist, especially in the flame retardant applications of plastics and related products, where its consumption accounts for more than 70% of the total. When used alone, antimony trioxide has almost no flame retardant properties, but when used as a synergist for halogenated flame retardants, particularly in combination with bromine-based flame retardants, it can significantly improve the flame retardant effect. In recent years, due to the increased difficulty in antimony ore mining and the tight supply of antimony raw materials, the price of antimony has continued to rise, causing the price of antimony trioxide to soar. This has led to a significant increase in the cost of flame retardant products, creating cost problems for corresponding flame retardant modification companies. Therefore, researchers have been searching for new flame retardant synergists to replace antimony trioxide. In recent years, some alternatives such as zinc stannate, zinc hydroxystannate, zinc borate and molybdenum compounds have been developed. Although they can play a good flame retardant role in plastic products, these alternatives are still relatively expensive. Moreover, under certain conditions of increasing quantity, they can only replace about 30% of antimony trioxide, which may lead to a decrease in overall mechanical properties.
[0003] Therefore, it is essential to find a flame retardant synergist that is inexpensive, has a large substitution capacity, and is simple to process. Summary of the Invention
[0004] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this invention is to provide a flame retardant synergist that can completely replace antimony trioxide, with a better flame retardant effect than antimony trioxide and a price that is 85% lower than antimony trioxide.
[0005] The purpose of this invention is to provide a method for preparing the above-mentioned flame retardant synergist that replaces antimony trioxide. This method is simple, easy to operate, stable in control, produces reliable products, has high production efficiency, and low cost, and has the potential for industrial production.
[0006] Another objective of this invention is to provide an environmentally friendly flame retardant synergist that can replace antimony trioxide and has good flame retardant effects in polymer materials such as ABS, PP, PVC, and PA, while also having better environmental performance than antimony trioxide.
[0007] To achieve the above objectives, the present invention provides a kaolin-supported zinc ferrite flame retardant synergist that can replace antimony trioxide. The flame retardant synergist includes a layered kaolin carrier and zinc ferrite loaded on the surface and between the layers of the kaolin. The zinc ferrite is loaded onto the kaolin in the form of nanoparticles through in-situ growth, thereby forming a layered-particle composite structure.
[0008] This invention also provides a method for preparing a kaolin-supported zinc ferrite flame retardant synergist that can replace antimony trioxide, the reaction steps of which are as follows: Step 1. Dissolve the iron salt and zinc salt in deionized water and stir until well mixed; Step 2. Add kaolin to deionized water and disperse it under ultrasonic conditions for a certain period of time to obtain a uniform suspension; Step 3. Place the solution obtained in Step 1 into a three-necked flask and adjust the pH value of the solution; Step 4. Add the suspension from Step 2 to the three-necked flask from Step 3, heat and react for a period of time to obtain the precipitate; Step 5. Dry the precipitate obtained in Step 4 at a certain temperature to obtain the precursor; Step 6. Calcine the precursor obtained in Step 5 in a muffle furnace at a certain temperature to obtain a flame retardant synergist.
[0009] The iron salt mentioned in step 1 is one of ferric nitrate, ferric sulfate, and ferric chloride, with ferric chloride being the preferred iron salt.
[0010] The zinc salt mentioned in step 1 is one of zinc nitrate, zinc sulfate, and zinc chloride, with zinc chloride being the preferred zinc salt.
[0011] The molar ratio of zinc salt to iron salt in step 1 is 1:2.1~2.8, and the preferred molar ratio is 1:2.1~2.4.
[0012] The kaolin mentioned in step 2 has a mesh size of 600, 800, or 1000, with 800 being the preferred mesh size.
[0013] The carrier ratio of the kaolin in step 2 is 40-80%, and the preferred carrier ratio is 60-80%.
[0014] The ultrasound time mentioned in step 2 is 30~60 min, preferably 30~45 min.
[0015] The pH value mentioned in step 3 is 9~12, preferably 10~11.
[0016] The reaction temperature in step 4 is 70~100 °C, and the reaction time is 2~6 h, preferably 80~90 °C. The preferred reaction time is 3 to 4 hours.
[0017] The drying temperature in step 5 is 80~120 °C, and the drying time is 12~20 h. Preferably, the drying temperature is 90~100 °C, and the drying time is 14~16 h.
[0018] The calcination temperature in step 6 is 400~800 °C, and the calcination time is 4~8 h, preferably 400~600 °C, and preferably 4~5 h.
[0019] The flame retardant synergist is applied to polymer materials such as ABS, PP, PVC, and PA. By weight, the flame retardant synergist is 1-6 parts, used to partially or completely replace antimony trioxide.
[0020] The beneficial effects of this invention are as follows: 1. The flame retardant synergist provided by the present invention uses zinc salt, iron salt and kaolin as raw materials. The precursor is generated by in-situ co-precipitation and then subjected to high-temperature calcination to obtain zinc ferrite which is grown in situ in the form of nanoparticles and loaded on the surface and interlayer of kaolin. The process is mature, the raw materials are widely available, the operating conditions are mild, and it is suitable for large-scale production.
[0021] 2. The flame retardant synergist of the present invention is applied to polymer materials such as ABS, PP, PVC, and PA. During combustion, it can catalyze the formation of a dense and continuous protective carbon layer in the matrix and work synergistically with the physical heat insulation barrier formed by kaolin to effectively inhibit heat transfer and the escape of combustible gases, and significantly reduce the heat release rate of the material.
[0022] 3. The flame retardant synergist of the present invention can partially or completely replace expensive antimony trioxide while maintaining excellent flame retardant performance, thereby significantly reducing the overall cost of flame retardant materials and providing an economical and effective alternative to antimony trioxide for polymer flame retardant materials. Attached Figure Description
[0023] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
[0024] Figure 1 The infrared spectra are those of Embodiments 1, 2, 3 and 4 of the present invention.
[0025] Figure 2 The data are from the cone calorimetry test of ABS in Example 3 of this invention. Detailed Implementation
[0026] To more clearly illustrate the present invention, the following description, in conjunction with preferred embodiments and accompanying drawings, further explains the invention. Similar components in the drawings are indicated by the same reference numerals. Those skilled in the art should understand that the specific description below is illustrative rather than restrictive and should not be construed as limiting the scope of protection of the present invention.
[0027] Example 1 A method for preparing a kaolin-supported zinc ferrite flame retardant synergist that can replace antimony trioxide. The method includes the following steps: 0.01 mol of zinc chloride dihydrate and 0.02 mol of ferric chloride hexahydrate are added to 150 ml of deionized water and stirred until homogeneous. The pH of the solution is adjusted to 12 to obtain a homogeneous blend solution. 1.61 g of kaolin is ultrasonically treated for 30 min and then added to the above blend solution. The mixture is reacted at 80 °C for 2 h to obtain a precipitated blend. Subsequently, the obtained precipitate is calcined in a muffle furnace at 500 °C for 5 h to obtain the kaolin-supported zinc ferrite flame retardant synergist.
[0028] Example 2: A method for preparing a kaolin-supported zinc ferrite flame retardant synergist that can replace antimony trioxide. The method includes the following steps: 0.01 mol of zinc chloride dihydrate and 0.02 mol of ferric chloride hexahydrate are added to 150 ml of deionized water and stirred until homogeneous. The pH of the solution is adjusted to 12 to obtain a homogeneous blend solution. 3.62 g of kaolin is ultrasonically treated for 30 min and then added to the above blend solution. The mixture is reacted at 80 °C for 2 h to obtain a precipitated blend. Subsequently, the obtained precipitate is calcined in a muffle furnace at 500 °C for 5 h to obtain the kaolin-supported zinc ferrite flame retardant synergist.
[0029] Example 3 A method for preparing a kaolin-supported zinc ferrite flame retardant synergist that can replace antimony trioxide. The method includes the following steps: 0.01 mol of zinc chloride dihydrate and 0.02 mol of ferric chloride hexahydrate are added to 150 ml of deionized water and stirred until homogeneous. The pH of the solution is adjusted to 12 to obtain a homogeneous blend solution. 6.29 g of kaolin is ultrasonically treated for 30 min and then added to the above blend solution. The mixture is reacted at 80 °C for 2 h to obtain a precipitated blend. Subsequently, the obtained precipitate is calcined in a muffle furnace at 500 °C for 5 h to obtain the kaolin-supported zinc ferrite flame retardant synergist.
[0030] Example 4 A method for preparing a kaolin-supported zinc ferrite flame retardant synergist that can replace antimony trioxide. The method includes the following steps: 0.01 mol of zinc chloride dihydrate and 0.02 mol of ferric chloride hexahydrate are added to 150 ml of deionized water and stirred until homogeneous. The pH of the solution is adjusted to 12 to obtain a homogeneous blend solution. 9.64 g of kaolin is ultrasonically treated for 30 min and then added to the above blend solution. The mixture is reacted at 80 °C for 2 h to obtain a precipitated blend. Subsequently, the obtained precipitate is calcined in a muffle furnace at 500 °C for 5 h to obtain the kaolin-supported zinc ferrite flame retardant synergist.
[0031] Application Example 1 This embodiment provides a method for preparing flame-retardant ABS material with high flame retardant performance and high substitution efficiency: The ABS resin, flame retardant, and flame retardant synergist prepared in Example 1 were dried at 80 °C for 8-10 h to remove moisture completely before use. The raw material composition, by mass, was: 84 parts ABS resin, 12 parts decabromodiphenyl ethane flame retardant, 3 parts antimony trioxide, and 1 part flame retardant synergist. The flame retardant, flame retardant synergist, and antimony trioxide were thoroughly mixed and then added together with the ABS resin into a torque rheometer for melt blending to obtain a flame-retardant ABS composite material. Specifically, ABS resin, flame retardant, flame retardant synergist, and antimony trioxide are dried at 80 °C for 8-10 h to fully remove moisture and obtain dried components. Subsequently, the flame retardant, flame retardant synergist, and antimony trioxide are thoroughly mixed to obtain a first premix. The ABS resin is then thoroughly mixed with the first premix to obtain a second premix. The second premix is added to a torque rheometer and melt-blended under set process conditions (processing temperature: 180±10 °C for zones one to three, rotation speed 50 rpm, processing time 10 min). Finally, after cooling and drying, flame-retardant ABS composite material is obtained.
[0032] Application Example 2 This embodiment provides a method for preparing flame-retardant ABS material with high flame retardant performance and high substitution efficiency: The ABS resin, flame retardant, and flame retardant synergist prepared in Example 2 were dried at 80 °C for 8-10 h to remove moisture completely before use. The raw material composition, by mass parts, was: 84 parts ABS resin, 12 parts decabromodiphenyl ethane flame retardant, 2 parts antimony trioxide, and 2 parts flame retardant synergist. The flame retardant, flame retardant synergist, and antimony trioxide were thoroughly mixed and then added together with the ABS resin into a torque rheometer for melt blending to obtain a flame-retardant ABS composite material. Specifically, ABS resin, flame retardant, flame retardant synergist, and antimony trioxide are dried at 80 °C for 8-10 h to fully remove moisture and obtain dried components. Subsequently, the flame retardant, flame retardant synergist, and antimony trioxide are thoroughly mixed to obtain a first premix. The ABS resin is then thoroughly mixed with the first premix to obtain a second premix. The second premix is added to a torque rheometer and melt-blended under set process conditions (processing temperature: 180±10 °C for zones one to three, rotation speed 50 rpm, processing time 10 min). Finally, after cooling and drying, flame-retardant ABS composite material is obtained.
[0033] Application Example 3 This embodiment provides a method for preparing flame-retardant ABS material with high flame retardant performance and high substitution efficiency: The ABS resin, flame retardant, and flame retardant synergist prepared in Example 3 were dried at 80 °C for 8-10 h to remove moisture completely before use. The raw material composition, by mass parts, was: 84 parts ABS resin, 12 parts decabromodiphenyl ethane flame retardant, 1 part antimony trioxide, and 3 parts flame retardant synergist. The flame retardant, flame retardant synergist, and antimony trioxide were thoroughly mixed and then added together with the ABS resin into a torque rheometer for melt blending to obtain a flame-retardant ABS composite material. Specifically, ABS resin, flame retardant, flame retardant synergist, and antimony trioxide are dried at 80 °C for 8-10 h to fully remove moisture and obtain dried components. Subsequently, the flame retardant, flame retardant synergist, and antimony trioxide are thoroughly mixed to obtain a first premix. The ABS resin is then thoroughly mixed with the first premix to obtain a second premix. The second premix is added to a torque rheometer and melt-blended under set process conditions (processing temperature: 180±10 °C for zones one to three, rotation speed 50 rpm, processing time 10 min). Finally, after cooling and drying, flame-retardant ABS composite material is obtained.
[0034] Application Example 4 This embodiment provides a method for preparing flame-retardant ABS material with high flame retardant performance and high substitution efficiency: The ABS resin, flame retardant, and flame retardant synergist prepared in Example 4 were dried at 80 °C for 8-10 h to remove moisture completely before use. The raw material composition, by mass, was: 84 parts ABS resin, 12 parts decabromodiphenyl ethane flame retardant, 1 part antimony trioxide, and 3 parts flame retardant synergist. The flame retardant, flame retardant synergist, and antimony trioxide were thoroughly mixed and then added together with the ABS resin into a torque rheometer for melt blending to obtain a flame-retardant ABS composite material. Specifically, ABS resin, flame retardant, flame retardant synergist, and antimony trioxide are dried at 80 °C for 8-10 h to fully remove moisture and obtain dried components. Subsequently, the flame retardant, flame retardant synergist, and antimony trioxide are thoroughly mixed to obtain a first premix. The ABS resin is then thoroughly mixed with the first premix to obtain a second premix. The second premix is added to a torque rheometer and melt-blended under set process conditions (processing temperature: 180±10 °C for zones one to three, rotation speed 50 rpm, processing time 10 min). Finally, after cooling and drying, flame-retardant ABS composite material is obtained.
[0035] Comparative Example 1 This comparative example provides a novel method for preparing ABS composite materials: The ABS resin, flame retardant, and flame retardant synergist were dried at 80 °C for 8–10 h to remove moisture completely before use. The raw material composition, by mass, was: 88 parts ABS resin, 9 parts decabromodiphenyl ethane flame retardant, and 3 parts antimony trioxide. The flame retardant and antimony trioxide were thoroughly mixed and then added together with the ABS resin into a torque rheometer for melt blending to obtain the flame-retardant ABS composite material. Specifically, ABS resin, flame retardant, and antimony trioxide are dried at 80 °C for 8-10 hours to remove moisture and obtain dried components. Then, the flame retardant and antimony trioxide are thoroughly mixed to obtain a first premix. The ABS resin is then thoroughly mixed with the first premix to obtain a second premix. The second premix is added to a HAP internal mixer and melt-blended under set process conditions (processing temperature: 180±10 °C for zones one to three, rotation speed 50 rpm, processing time 10 min). Finally, after cooling and drying, flame-retardant ABS composite material is obtained.
[0036] Comparative Example 2 This comparative example provides a novel method for preparing ABS composite materials: The ABS resin, flame retardant, and flame retardant synergist were dried at 80 °C for 8–10 h to remove moisture completely before use. The raw material composition, by mass, was: 86 parts ABS resin, 10.5 parts decabromodiphenyl ethane flame retardant, and 3.5 parts antimony trioxide. The flame retardant and antimony trioxide were thoroughly mixed and then added together with the ABS resin into a torque rheometer for melt blending to obtain the flame-retardant ABS composite material. Specifically, ABS resin, flame retardant, and antimony trioxide are dried at 80 °C for 8-10 h to remove moisture and obtain dried components. Then, the flame retardant and antimony trioxide are thoroughly mixed to obtain a first premix. The ABS resin is then thoroughly mixed with the first premix to obtain a second premix. The second premix is added to a torque rheometer and melt-blended under set process conditions (processing temperature: 180±10 °C for zones one to three, rotation speed 50 rpm, processing time 10 min). Finally, after cooling and drying, flame-retardant ABS composite material is obtained.
[0037] Comparative Example 3 This comparative example provides a novel method for preparing ABS composite materials: The ABS resin, flame retardant, and flame retardant synergist were dried at 80 °C for 8–10 h to remove moisture completely before use. The raw material composition, by mass, was: 84 parts ABS resin, 12 parts decabromodiphenyl ethane flame retardant, and 4 parts antimony trioxide. The flame retardant and flame retardant synergist were thoroughly mixed and then added together with the ABS resin into a torque rheometer for melt blending to obtain the flame-retardant ABS composite material. Specifically, ABS resin, flame retardant, and antimony trioxide were dried at 80 °C for 8–10 h to fully remove moisture, obtaining dried components. Then, the flame retardant and antimony trioxide were thoroughly mixed to obtain a first premix. Next, the ABS resin was thoroughly mixed with the first premix to obtain a second premix. The second premix was added to a torque rheometer and melt-blended under set process conditions (processing temperature: 180 ± 10 °C for zones one to three, rotation speed 50 rpm, processing time 10 min). Finally, after cooling and drying, flame-retardant ABS composite material was obtained. The conventional mechanical properties and flammability of the ABS composite material were tested according to the following standards, and the results are shown in Table 1.
[0038] Impact strength of cantilever beam: Tested according to GB / T 1043.1-2018 standard, the impact energy is 2 J; Tensile strength: Tested according to GB / T 1040.1-2018 standard, at a test speed of 50 mm / min; Flammability: Tested according to LOI standard in accordance with GB / T 2406-2015 and UL-94 standard in accordance with GB / T 2408-2008.
[0039] from Figure 1 The infrared spectra of Examples 1, 2, 3, and 4 show the characteristic infrared peaks of the final products, indicating that the synthesis of each product was successful.
[0040] Figure 2 This invention applies to Example 3 and ABS cone calorimetry test data, including peak heat release rate (pHRR) and total heat release (THR). Example 3 comprises a composite material consisting of 84 parts ABS resin, 12 parts flame retardant decabromodiphenyl ethane, 1 part antimony trioxide, and 3 parts of the flame retardant synergist prepared in Example 3. Figure 2 As can be seen, compared with the pure ABS sample, Application Example 3 exhibits superior flame retardant performance. Compared with the ABS sample, the pHRR and THR of Example 3 are reduced by 62.1% and 51.1%, respectively. This is because the flame retardant synergist can form a heat insulation layer on the substrate surface during thermal decomposition to isolate heat and oxygen. At the same time, the halogen flame retardant rapidly releases a large amount of inert gas, which effectively dilutes the combustible gas in the combustion zone, thereby inhibiting the combustion process. The flame retardant synergist works synergistically with the bromine-antimony system to retard flame, which shows that the flame retardant synergist has a high substitution efficiency.
[0041] The flame retardancy, cantilever beam notched impact strength, and tensile strength of the flame retardant ABS materials in Application Examples 1 to 4 and Comparative Examples 1 to 3 were tested using the corresponding standards, and the results are shown in Table 1. Table 1 As can be seen from the performance comparison of Comparative Examples 1, 2, and 3 in Table 1, when the ratio of flame retardant to antimony trioxide is 3:1, with the increase of the total amount of antimony bromine added, the ABS composite material reaches the flame retardant rating V-0 at a total addition amount of 16%, and its limiting oxygen index continuously increases with the increase of the addition amount. Compared with the comparative examples, the limiting oxygen index of Application Examples 1, 2, 3, and 4 of this invention is significantly improved, and all reach the UL-94 V-0 rating. Furthermore, under the carrier ratio of Application Example 3, the flame retardant synergist has a better flame retardant effect and a higher substitution efficiency. The above results indicate that the flame retardant synergist prepared in this invention exhibits a high substitution efficiency when replacing antimony trioxide in flame retardant systems. Without significantly reducing the mechanical properties of the material, it can effectively improve the flame retardant performance of the material, demonstrating excellent comprehensive performance.
[0042] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.
Claims
1. A kaolin-supported zinc ferrite flame retardant synergist that can replace antimony trioxide, characterized in that, The flame retardant synergist includes a layered kaolin carrier and zinc ferrite loaded on the surface and between the layers of the kaolin, wherein the zinc ferrite is loaded onto the kaolin in the form of nanoparticles through in-situ growth, thereby forming a layered-particle composite structure.
2. A method for preparing a kaolin-supported zinc ferrite flame retardant synergist that can replace antimony trioxide, characterized in that, The preparation method includes the following steps: Step 1: Dissolve the iron salt and zinc salt in deionized water and stir until well combined; Step 2: Add kaolin to deionized water and disperse it under ultrasonic conditions for a certain period of time to obtain a uniform suspension; Step 3: Place the solution obtained in Step 1 into a three-necked flask and adjust the pH value of the solution; Step 4: Add the suspension from Step 2 to the three-necked flask from Step 3, heat and react for a period of time to obtain a precipitate; Step 5: Dry the precipitate obtained in Step 4 at a certain temperature for a period of time to obtain the precursor; Step 6: The precursor obtained in Step 5 is calcined in a muffle furnace at a certain temperature for a certain time to obtain a flame retardant synergist.
3. The preparation method of a kaolin-supported zinc ferrite flame retardant synergist that can replace antimony trioxide according to claim 2, characterized in that, In step 1, the iron salt is one of ferric nitrate, ferric sulfate, and ferric chloride, and the zinc salt is one of zinc nitrate, zinc sulfate, and zinc chloride. The molar ratio of the zinc salt to the iron salt is 1:2.1~2.
6.
4. The preparation method of a kaolin-supported zinc ferrite flame retardant synergist that can replace antimony trioxide according to claim 2, characterized in that, In step 2, the kaolin has a mesh size of 600-1000, the ultrasonic time is 20-60 min, and the carrier ratio of the kaolin is 40-80%.
5. The preparation method of a kaolin-supported zinc ferrite flame retardant synergist that can replace antimony trioxide according to claim 2, characterized in that, In step 3, the pH value of the solution is 9-12.
6. A method for preparing a kaolin-supported zinc ferrite flame retardant synergist that can replace antimony trioxide, as described in claim 2, characterized in that... In step 4, the solution reaction temperature is 70~100°C, and the reaction time is 2~6 h.
7. The preparation method of a kaolin-supported zinc ferrite flame retardant synergist that can replace antimony trioxide according to claim 2, characterized in that, In step 5, the oven temperature is 80~120°C, and the drying time is 12~20 h.
8. The preparation method of a kaolin-supported zinc ferrite flame retardant synergist that can replace antimony trioxide according to claim 2, characterized in that, In step 6, the temperature of the muffle furnace is set to 400~800°C, and the calcination time is 4~8h.
9. The application of a kaolin-supported zinc ferrite flame retardant synergist that can replace antimony trioxide, characterized in that, The flame retardant synergist is applied to polymer materials such as ABS, PP, PVC, and PA. By weight, the flame retardant synergist is 1-6 parts, used to partially or completely replace antimony trioxide.