A method for preparing high temperature resistant and moisture proof plastic film material

Abstract

The invention belongs to the technical field of polypropylene, specifically a method for preparing a high temperature resistant and moisture-proof plastic film material, including 70-90 parts by weight of polyolefin resin, 10-30 parts by weight of carbazole piperazine-based phosphoramide charring flame retardant, and 0.2-0.5 parts by weight of antioxidant; the high carbon content of piperazine and a large amount of benzene rings contained in the carbazole piperazine-based phosphoramide charring flame retardant of the present invention are used as carbon sources and charring agents to form an expansion flame retardant, which plays a good condensed phase and plays a flame retardant role, and significantly improves the flame retardant properties of polypropylene and polyethylene film materials. The charring flame retardant contains heat-resistant carbazole, biphenyl and other condensed ring structures, which are not easy to thermally decompose, and have strong hydrophobicity. When added to a polypropylene matrix, the thermal decomposition temperature and high temperature resistance of the film material can be increased, and the water contact angle can be increased, which is conducive to improving water resistance and moisture resistance. It has good practical applications in anti-rust films, packaging films, etc.

Description

Technical Field

[0001] The invention belongs to the technical field of polypropylene, and in particular relates to a method for preparing a high-temperature resistant and moisture-proof plastic film material. Background Art

[0002] Polypropylene, polyethylene and other resins are widely used in packaging films, anti-rust films, agricultural films, etc. due to their low cost, excellent processing performance, good electrical insulation and other advantages. Traditional polypropylene, polyethylene and their film materials have poor high temperature resistance. The mechanical and processing properties of polypropylene and polyethylene materials will be greatly affected at high temperatures. In addition, polypropylene and polyethylene materials do not have flame retardant properties, and the limiting oxygen index is only about 17-18%, which is easy to burn. It is of great significance to improve the high temperature resistance, flame retardancy, waterproof and moisture-proof properties of polypropylene, polyethylene and their film materials, and expand their practical applications in anti-rust films, packaging films, etc.

[0003] At present, the modification methods for polypropylene and polyethylene materials mainly include copolymerization modification, cross-linking modification, filling modification and other methods. Carbon-forming agents mainly include triazines, piperazines, etc., which can promote the combustion and carbonization of materials such as polypropylene and improve the flame retardancy and heat resistance of materials when compounded with phosphorus-containing flame retardants. Chinese patent CN113845725B discloses a flame-retardant polypropylene material with good water resistance and its preparation method, which uses a composite of polyaminocyclotriphosphazene, hyperbranched piperazine triazine carbon-forming agent and bis(1-alkoxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate as an intumescent flame retardant to improve the flame retardancy and water resistance of polypropylene materials. However, the hyperbranched piperazine triazine carbon-forming agent of the patent does not contain flame-retardant phosphorus elements, and needs to be compounded with cyclotriphosphazene phosphorus-containing flame retardants to achieve a flame retardant effect, and does not improve the high temperature resistance of polypropylene and polyethylene materials. Summary of the invention

[0004] The invention solves the problem of poor high temperature resistance of polypropylene film materials and simultaneously improves the water resistance, moisture resistance and flame retardancy of polypropylene and polyethylene film materials.

[0005] The technical scheme is as follows: a high temperature resistant and moisture proof plastic film material comprises 70-90 parts by weight of polyolefin resin, 10-30 parts by weight of carbazole piperazine phosphoramide carbon-forming flame retardant, and 0.2-0.5 parts by weight of antioxidant.

[0006] The preparation method of the carbazole piperazine-based phosphoramide charring flame retardant is as follows: placing a reaction bottle in a water bath, controlling the water bath temperature to be 0-10°C, then adding a solvent, phenylphosphonyl dichloride, carbazole piperazine monomer, and triethylamine, controlling the water bath temperature to be 45-60°C, reacting for 10-20 hours, precipitating, filtering, washing with deionized water and ethanol in turn, and drying to obtain the carbazole piperazine-based phosphoramide charring flame retardant.

[0007] Preferably, the polyolefin resin is polypropylene resin or polyethylene resin.

[0008] Preferably, the ratio of phenylphosphonyl dichloride, carbazole piperazine monomer, and triethylamine is (1.4-1.6) mol:1 mol:(2.4-2.8) mol.

[0009] Preferably, the solvent is N,N-dimethylformamide, N,N-dimethylacetamide or acetonitrile.

[0010] Preferably, the preparation method of the carbazole piperazine monomer is as follows: placing a reaction bottle in a water bath, adding toluene and N,N-dimethylformamide in a ratio of (8-10):1L as a mixed solvent, then adding (4-(piperazine-1-yl)phenyl)boric acid, 3,6-dibromo-9-(4-bromophenyl)carbazole, [1,1'-bis(diphenylphosphino)ferrocene]palladium dichloride, and an aqueous solution of potassium carbonate, passing nitrogen, controlling the water bath temperature to 80-100°C, reacting for 3-5h, cooling, adding water, and adding ethyl acetate for extraction, collecting the ethyl acetate organic layer, drying to remove water, and concentrating under reduced pressure, and the product is recrystallized from toluene to obtain the carbazole piperazine monomer.

[0011] Preferably, the ratio of (4-(piperazine-1-yl)phenyl)boric acid, 3,6-dibromo-9-(4-bromophenyl)carbazole, [1,1'-bis(diphenylphosphino)ferrocene]palladium dichloride, and potassium carbonate is (3.3-4.2) mol:1 mol:(0.08-0.09) mol:(8.5-10) mol.

[0012] Preferably, the preparation method of the high temperature resistant and moisture-proof plastic film material is as follows: polypropylene resin, carbazole piperazine phosphoramide charring flame retardant and antioxidant are mixed in a high-speed mixer, and then the mixture is blown and pulled in an extrusion blow molding machine to obtain the high temperature resistant and moisture-proof plastic film material.

[0013] Preferably, the temperature of sections 1-3 of the extrusion blow molding machine is 175-195° C., the blow-up ratio is 1-1.5, and the traction roller speed is 20-40 r / min.

[0014] The technical effect of the present invention is as follows: the present invention uses (4-(piperazine-1-yl)phenyl)boric acid and 3,6-dibromo-9-(4-bromophenyl)carbazole for coupling reaction to obtain carbazole piperazine monomer, and then polymerizes with phenylphosphonyl dichloride to obtain a novel carbazole piperazine-based phosphoramide carbon-forming flame retardant. Then, the monomer is extruded and blow-molded with polypropylene or polyethylene resin to obtain a high-temperature resistant and moisture-proof plastic film material.

[0015] The carbazole piperazine-based phosphoramide charring flame retardant of the present invention contains high-carbon-content piperazine and a large number of benzene rings as carbon sources and charring agents, the nitrogen source in piperazine and carbazole as a gas source, and the phosphorus-containing group as an acid source to form an expansion flame retardant. When burned, a large amount of non-combustible gases such as nitrogen are generated, and the dehydration of polypropylene and polyethylene matrices is promoted to form charring to form a stable expansion layer, which plays a good condensed phase flame retardant role, has the functions of heat insulation, oxygen isolation, smoke suppression, drip prevention, etc., and thus exhibits excellent flame retardant performance.

[0016] The char-forming flame retardant of the present invention contains heat-resistant condensed ring structures such as carbazole and biphenyl, is not easy to be thermally decomposed, and has strong hydrophobicity. When added to a polypropylene matrix, the thermal decomposition temperature and high temperature resistance of the film material can be increased, and the water contact angle of the polyethylene and polypropylene films can be increased, which is beneficial to improving the water resistance and moisture resistance. It has good practical applications in anti-rust films, packaging films, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the reaction formula for the preparation of carbazole piperazine monomer.

[0018] Figure 2 It is the preparation reaction formula of carbazole piperazine phosphoramide charring flame retardant. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the embodiments. It should be understood that the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] Example 1

[0021] The reaction bottle was placed in a water bath, 40 mL of toluene and 5 mL of N,N-dimethylformamide were added as a mixed solvent, and then 84 mmol (4-(piperazin-1-yl)phenyl)boric acid (CAS No. 513246-99-6), 20 mmol 3,6-dibromo-9-(4-bromophenyl)carbazole (CAS No. 73087-83-9), 0.16 mmol [1,1'-bis(diphenylphosphino)ferrocene]palladium dichloride (Pd(dppf)Cl2) (CAS No. 72287-26-4), and 8 mL of an aqueous solution containing 17 mmol potassium carbonate were added, nitrogen was introduced, the water bath temperature was controlled at 90°C, the reaction was carried out for 3 h, cooled, water was added, and ethyl acetate was added for extraction, the ethyl acetate organic layer was collected, dried to remove water, and concentrated under reduced pressure. The product was recrystallized from toluene to obtain a carbazole piperazine monomer.

[0022] Place the reaction bottle in a water bath, control the water bath temperature to 0°C, then add 120mL N,N-dimethylacetamide solvent, 96mmol phenylphosphonyl dichloride (CAS No. 824-72-6), 60mmol carbazole piperazine monomer, and 156mmol triethylamine (TEA), control the water bath temperature to 60°C, react for 10h, add ethanol to precipitate, filter, wash with deionized water and ethanol in turn, and dry to obtain a carbazole piperazine-based phosphoramide carbon-forming flame retardant.

[0023] 900g of polypropylene resin, 100g of carbazole piperazine phosphoramide charring flame retardant and 5g of antioxidant 168 were mixed in a high-speed mixer, and then the mixture was placed in an extrusion blow molding machine with the temperatures of sections 1-3 being 175°C, 185°C and 195°C, the blowing ratio being controlled to be 1 during blow molding, and the traction roller speed being 30r / min during traction to obtain a high temperature resistant and moisture-proof plastic film material.

[0024] Example 2

[0025] The reaction bottle was placed in a water bath, and 50 mL of toluene and 5 mL of N,N-dimethylformamide were added as a mixed solvent. Then, 84 mmol (4-(piperazine-1-yl)phenyl)boric acid, 20 mmol 3,6-dibromo-9-(4-bromophenyl)carbazole, 0.17 mmol [1,1'-bis(diphenylphosphino)ferrocene]palladium dichloride, and 8 mL of an aqueous solution containing 18 mmol potassium carbonate were added. Nitrogen was introduced, and the water bath temperature was controlled to 80°C. The reaction was performed for 5 h, cooled, water was added, and ethyl acetate was added for extraction. The ethyl acetate organic layer was collected, dried to remove water, and concentrated under reduced pressure. The product was recrystallized from toluene to obtain a carbazole piperazine monomer.

[0026] Place the reaction bottle in a water bath, control the water bath temperature to 10°C, then add 150mL N,N-dimethylformamide solvent, 84mmol phenylphosphonyl dichloride, 60mmol carbazole piperazine monomer, and 168mmol triethylamine, control the water bath temperature to 45°C, react for 20h, add ethanol to precipitate, filter, wash with deionized water and ethanol in turn, and dry to obtain a carbazole piperazine-based phosphoramide carbon-forming flame retardant.

[0027] 830g of polypropylene resin, 170g of carbazole piperazine phosphoramide charring flame retardant and 4g of antioxidant 168 were mixed in a high-speed mixer, and then the mixture was placed in an extrusion blow molding machine with temperatures of 175°C, 185°C and 195°C in sections 1-3. The blowing ratio was controlled to be 1 during blow molding, and the traction roller speed was 40r / min during traction to obtain a high temperature resistant and moisture-proof plastic film material.

[0028] Example 3

[0029] The reaction bottle was placed in a water bath, and 50 mL of toluene and 5 mL of N,N-dimethylformamide were added as a mixed solvent. Then, 72 mmol of (4-(piperazine-1-yl)phenyl)boric acid, 20 mmol of 3,6-dibromo-9-(4-bromophenyl)carbazole, 0.16 mmol of [1,1'-bis(diphenylphosphino)ferrocene]palladium dichloride, and 12 mL of an aqueous solution containing 20 mmol of potassium carbonate were added. Nitrogen was introduced, and the water bath temperature was controlled to be 80°C. The reaction was performed for 5 h, cooled, water was added, and ethyl acetate was added for extraction. The ethyl acetate organic layer was collected, dried to remove water, and concentrated under reduced pressure. The product was recrystallized from toluene to obtain a carbazole piperazine monomer.

[0030] Place the reaction bottle in a water bath, control the water bath temperature to 10°C, then add 180mL acetonitrile solvent, 96mmol phenylphosphonyl dichloride, 60mmol carbazole piperazine monomer, and 168mmol triethylamine, control the water bath temperature to 60°C, react for 18h, add ethanol to precipitate, filter, wash with deionized water and ethanol in turn, and dry to obtain a carbazole piperazine-based phosphoramide carbon-forming flame retardant.

[0031] 760g of polypropylene resin, 240g of carbazole piperazine phosphoramide charring flame retardant and 3g of antioxidant 168 were mixed in a high-speed mixer, and then the mixture was placed in an extrusion blow molding machine with temperatures of 175°C, 185°C and 195°C in sections 1-3. The blowing ratio was controlled to be 1 during blow molding, and the traction roller speed was 20r / min during traction to obtain a high temperature resistant and moisture-proof plastic film material.

[0032] Example 4

[0033] The reaction bottle was placed in a water bath, 45 mL of toluene and 5 mL of N,N-dimethylformamide were added as a mixed solvent, and then 66 mmol (4-(piperazine-1-yl)phenyl)boric acid, 20 mmol 3,6-dibromo-9-(4-bromophenyl)carbazole, 0.18 mmol [1,1'-bis(diphenylphosphino)ferrocene]palladium dichloride, and 12 mL of an aqueous solution containing 20 mmol potassium carbonate were added, nitrogen was introduced, the water bath temperature was controlled at 100°C, the reaction was performed for 3 h, cooled, water was added, and ethyl acetate was added for extraction, the ethyl acetate organic layer was collected, dried to remove water, and concentrated under reduced pressure. The product was recrystallized from toluene to obtain a carbazole piperazine monomer.

[0034] Place the reaction bottle in a water bath, control the water bath temperature to 5°C, then add 120mL N,N-dimethylformamide solvent, 84mmol phenylphosphonyl dichloride, 60mmol carbazole piperazine monomer, and 144mmol triethylamine, control the water bath temperature to 45°C, react for 12h, add ethanol to precipitate, filter, wash with deionized water and ethanol in turn, and dry to obtain a carbazole piperazine-based phosphoramide carbon-forming flame retardant.

[0035] 700g of polypropylene resin, 300g of carbazole piperazine phosphoramide charring flame retardant and 2g of antioxidant 168 were mixed in a high-speed mixer, and then the mixture was placed in an extrusion blow molding machine with the temperatures of sections 1-3 being 175°C, 185°C and 195°C, the blowing ratio being controlled to be 1.5 during blow molding, and the traction roller speed being 30r / min during traction to obtain a high temperature resistant and moisture-proof plastic film material.

[0036] The difference between Comparative Example 1 and Example 1 is that the carbazole piperazine phosphoramide char-forming flame retardant is not added.

[0037] 900g of polypropylene resin and 5g of antioxidant 168 were mixed in a high-speed mixer, and then the mixture was placed in an extrusion blow molding machine with temperatures of 175°C, 185°C, and 195°C in sections 1-3. The blowing ratio was controlled to be 1 during blow molding, and the traction roller speed was 30r / min during traction to obtain a high-temperature resistant and moisture-proof plastic film material.

[0038] The difference between Comparative Example 2 and Example 1 is that when preparing the charring flame retardant, piperazine ( ) instead of the carbazole piperazine monomer.

[0039] Place the reaction bottle in a water bath, control the water bath temperature to 0°C, then add 120mL N,N-dimethylacetamide solvent, 96mmol phenylphosphonyl dichloride, 60mmol piperazine, and 156mmol triethylamine, control the water bath temperature to 60°C, react for 10 hours, add ethanol to precipitate, filter, wash with deionized water and ethanol in turn, and dry to obtain a piperazine-based phosphoramide carbon-forming flame retardant.

[0040] 900g of polypropylene resin, 100g of piperazine phosphoramide charring flame retardant and 5g of antioxidant 168 were mixed in a high-speed mixer, and then the mixture was placed in an extrusion blow molding machine with temperatures of 175°C, 185°C and 195°C in sections 1-3. The blowing ratio was controlled to be 1 during blow molding, and the traction roller speed was 30r / min during traction to obtain a high temperature resistant and moisture-proof plastic film material.

[0041] The difference between Comparative Example 3 and Example 1 is that when preparing the charring flame retardant, 3,6-diaminocarbazole ( ) instead of the carbazole piperazine monomer.

[0042] Place the reaction bottle in a water bath, control the water bath temperature to 0°C, then add 120mL N,N-dimethylacetamide solvent, 96mmol phenylphosphonyl dichloride, 60mmol 3,6-diaminocarbazole, and 156mmol triethylamine, control the water bath temperature to 60°C, react for 10 hours, add ethanol to precipitate, filter, wash with deionized water and ethanol in turn, and dry to obtain a carbazole-based phosphoramide carbon-forming flame retardant.

[0043] 900g of polypropylene resin, 100g of carbazole phosphoramide charring flame retardant and 5g of antioxidant 168 were mixed in a high-speed mixer, and then the mixture was placed in an extrusion blow molding machine with temperatures of 175°C, 185°C and 195°C in sections 1-3. The blowing ratio was controlled to be 1 during blow molding, and the traction roller speed was 30r / min during traction to obtain a high temperature resistant and moisture-proof plastic film material.

[0044] The water contact angle of plastic film materials is tested according to GB / T 30693-2014. The oxygen index is tested according to GB / T 2406.1-2008, and the vertical burning performance is tested according to UL94.

[0045] Table 1 Water contact angle and flame retardant properties of polypropylene plastic film materials

[0046]

[0047] The thermal properties of the plastic film material were tested by TG thermogravimetric analyzer in a nitrogen atmosphere at a test temperature of 25-700°C.

[0048] Table 2 Thermogravimetric properties analysis of polypropylene plastic film materials

[0049]

[0050] After testing, the polypropylene resin of Comparative Example 1 did not have a char-forming flame retardant added, had a water contact angle of 108.5°, a limiting oxygen index of only 17.5%, did not show a UL94 fire rating, had a temperature of 297.1°C when the mass loss was 10%, and had a residual carbon content of 6.8% at 700°C.

[0051] In Example 1-4, carbazole piperazine phosphoramide charring flame retardant was added, and the limiting oxygen index reached 27.8-31.7%, and the UL94 fire rating reached V0 level, with excellent flame retardant performance. This is because the high carbon content piperazine and a large number of benzene rings contained in the charring flame retardant are used as carbon sources and charring agents, the nitrogen source in piperazine and carbazole is used as a gas source, and the phosphorus-containing group is used as an acid source to form an expansion flame retardant, which produces a large amount of non-combustible gases such as nitrogen during combustion, and promotes the dehydration of the polypropylene matrix to form a stable expansion layer, which plays a good condensed phase flame retardant role, has heat insulation, oxygen isolation, smoke suppression, drip prevention and other effects, thereby showing excellent flame retardant performance. And the charring flame retardant contains heat-resistant carbazole, biphenyl and other condensed ring structures, which are not easy to thermally decompose, and have strong hydrophobicity. When added to the polypropylene matrix, the thermal decomposition temperature and high temperature resistance of the membrane material can be increased, and the water contact angle of the polypropylene film can be increased at the same time, which is conducive to improving the water resistance and moisture resistance. The practical application of polypropylene film in anti-rust film, packaging film, etc. has been expanded.

[0052] Comparative Example 2 uses phenylphosphonyl dichloride and piperazine as reaction raw materials, and obtains a piperazine-based phosphoramide charring flame retardant through polymerization reaction. Compared with Comparative Example 1, the charring flame retardant also significantly improves the limiting oxygen index of the polypropylene film material, UL94 is V1 grade, and the flame retardant performance is good. However, the limiting oxygen index and thermal decomposition temperature are lower than those of Example 1, mainly because, compared with Example 1, the charring flame retardant of Comparative Example 2 does not contain condensed ring structures such as carbazole and biphenyl, and the charring effect is not good, and the high temperature resistance is not good, resulting in poor flame retardancy and high temperature resistance of the polypropylene film material.

[0053] Comparative Example 3 uses phenylphosphonyl dichloride and 3,6-diaminocarbazole as reaction raw materials, and obtains a carbazole-based phosphoramide charring flame retardant through polymerization reaction. The limiting oxygen index and thermal decomposition temperature are lower than those of Example 1. This is mainly because, compared with Example 1, the charring flame retardant of Comparative Example 3 does not contain fused ring structures such as piperazine and biphenyl, and the charring effect is not good, the high temperature resistance is not good, and the flame retardant and high temperature resistance of the polypropylene film material are not well improved. And the water contact angle of the film material is lower than that of Comparative Example 1, because Example 1 contains more hydrophobic aromatic ring structures in the carbazole piperazine monomer, while the hydrophobic aromatic ring structure of 3,6-diaminocarbazole in Comparative Example 3 is less. As a result, the hydrophobic property of the charring flame retardant of Example 1 is greater than that of Comparative Example 3.

[0054] Example 5

[0055] 900g of polyethylene resin, 100g of carbazole piperazine phosphoramide charring flame retardant (prepared according to the method of Example 1) and 4g of antioxidant 168 were mixed in a high-speed mixer, and then the mixture was placed in an extrusion blow molding machine with the temperatures of sections 1-3 being 170°C, 175°C and 185°C. During blow molding, the blowing ratio was controlled to be 1 and the traction roller speed during traction was 30r / min to obtain a high temperature resistant and moisture-proof plastic film material.

[0056] Example 6

[0057] 800g of polyethylene resin, 200g of carbazole piperazine phosphoramide charring flame retardant (prepared according to the method of Example 1), and 4g of antioxidant 168 are mixed in a high-speed mixer, and then the mixture is placed in an extrusion blow molding machine with the temperatures of sections 1-3 being 175°C, 185°C, and 195°C. During blow molding, the blowing ratio is controlled to be 1, and the traction roller speed during traction is 30r / min, to obtain a high temperature resistant and moisture-proof plastic film material.

[0058] Example 7

[0059] 700 g of polyethylene resin, 300 g of carbazole piperazine phosphoramide charring flame retardant (prepared according to the method of Example 1), and 4 g of antioxidant 168 were mixed in a high-speed mixer, and then the mixture was placed in an extrusion blow molding machine with the temperatures of sections 1-3 being 170°C, 175°C, and 185°C. During blow molding, the blowing ratio was controlled to be 1, and the traction roller speed during traction was 30 r / min to obtain a high temperature resistant and moisture-proof plastic film material.

[0060] Comparative Example 4

[0061] 900g of polyethylene resin and 4g of antioxidant 168 were mixed in a high-speed mixer, and then the mixture was placed in an extrusion blow molding machine with temperatures of 170°C, 175°C, and 185°C in sections 1-3. The blowing ratio was controlled to be 1 during blow molding, and the traction roller speed was 30r / min during traction to obtain a high-temperature resistant and moisture-proof plastic film material.

[0062] The water contact angle of plastic film materials is tested according to GB / T 30693-2014. The oxygen index is tested according to GB / T 2406.1-2008, and the vertical burning performance is tested according to UL94.

[0063] Table 3 Water contact angle and flame retardant properties of polyethylene plastic film materials

[0064]

[0065] Comparative Example 1 is polyethylene without adding char-forming flame retardant, the limiting oxygen index is only 18.1%, and the water contact angle is 124.6°.

[0066] The polyethylene of Examples 5-7 is added with a char-forming flame retardant, and the limiting oxygen index reaches 27.3-30.9%. UL94 is V-0 grade. The water contact angle reaches 129.6-134.5°. The flame retardant performance and water resistance and waterproof performance are significantly improved.

[0067] The present application is described in detail above in conjunction with specific implementation methods and exemplary examples, but these descriptions cannot be understood as limiting the present application. Those skilled in the art understand that, without departing from the spirit and scope of the present application, a variety of equivalent replacements, modifications or improvements can be made to the technical solution of the present application and its implementation methods, all of which fall within the scope of the present application. The scope of protection of the present application shall be subject to the attached claims.

Claims

1. A high temperature resistant and moisture proof plastic film material, characterized in that: The high temperature resistant and moisture proof plastic film material comprises 70-90 parts by weight of polyolefin resin, 10-30 parts by weight of carbazole piperazine phosphoramide charring flame retardant, and 0.2-0.5 parts by weight of antioxidant; The preparation method of the carbazole piperazine phosphoramide charring flame retardant is as follows: placing a reaction bottle in a water bath, controlling the water bath temperature to be 0-10° C., then adding a solvent, phenylphosphonyl dichloride, carbazole piperazine monomer, and triethylamine, controlling the water bath temperature to be 45-60° C., reacting for 10-20 hours, precipitating, filtering, washing, and drying to obtain the carbazole piperazine phosphoramide charring flame retardant; The structural formula of the carbazole piperazine monomer is .

2. The high temperature resistant and moisture proof plastic film material according to claim 1, characterized in that: The polyolefin resin includes polypropylene resin and polyethylene resin.

3. The high temperature resistant and moisture proof plastic film material according to claim 1, characterized in that: The ratio of phenylphosphonyl dichloride, carbazole piperazine monomer and triethylamine is (1.4-1.6) mol: 1 mol: (2.4-2.8) mol.

4. The method for preparing a high temperature resistant and moisture proof plastic film material according to claim 1, characterized in that: The solvent is N,N-dimethylformamide, N,N-dimethylacetamide or acetonitrile.

5. The high temperature resistant and moisture proof plastic film material according to claim 1, characterized in that: The preparation method of the carbazole piperazine monomer comprises: placing a reaction bottle in a water bath, adding toluene and N,N-dimethylformamide as a mixed solvent, then adding (4-(piperazine-1-yl)phenyl)boric acid, 3,6-dibromo-9-(4-bromophenyl)carbazole, [1,1'-bis(diphenylphosphino)ferrocene]palladium dichloride, and an aqueous solution of potassium carbonate, introducing nitrogen, cooling after reaction, extracting, and recrystallizing to obtain the carbazole piperazine monomer.

6. The high temperature resistant and moisture proof plastic film material according to claim 5, characterized in that: The ratio of toluene to N,N-dimethylformamide is (8-10) L:1 L.

7. The high temperature resistant and moisture proof plastic film material according to claim 5, characterized in that: The ratio of (4-(piperazine-1-yl)phenyl)boric acid, 3,6-dibromo-9-(4-bromophenyl)carbazole, [1,1'-bis(diphenylphosphino)ferrocene]palladium dichloride and potassium carbonate is (3.3-4.2) mol:1 mol:(0.08-0.09) mol:(8.5-10) mol.

8. The high temperature resistant and moisture proof plastic film material according to claim 5, characterized in that: During the reaction, the water bath temperature is controlled to be 80-100° C., and the reaction time is 3-5 hours.

9. A method for preparing the high temperature resistant and moisture proof plastic film material according to any one of claims 1 to 8, characterized in that: The preparation method comprises the following steps: mixing polyolefin resin, carbazole piperazine phosphoramide carbon-forming flame retardant and antioxidant in a high-speed mixer, and then blowing and pulling the mixture in an extrusion blow molding machine to obtain a high-temperature resistant and moisture-proof plastic film material.

10. The method for preparing the high temperature resistant and moisture proof plastic film material according to claim 9, characterized in that: The temperature of the 1-3 sections of the extrusion blow molding machine is 175-195° C., the blow-up ratio is 1-1.5, and the traction roller speed is 20-40 r / min.

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