A flame-retardant polyurethane foam material and its preparation method

Abstract

The present invention relates to a flame-retardant polyurethane foam material and a preparation method thereof, belonging to the technical field of polyurethane materials. In the present invention, a polyurethane foam material with excellent high-temperature resistance and flame retardancy is prepared by the reaction of polyether polyol with a crosslinking agent and an isocyanate, and by adding a flame retardant, a filler and other additives. Finally, the flame retardancy of the polyurethane foam material is further improved by impregnation treatment with an aqueous ammonium polyphosphate solution.

Description

Technical Field

[0001] The present invention belongs to the technical field of polyurethane materials, and relates to a flame-retardant polyurethane foam material and a preparation method thereof. Background Art

[0002] Polyurethane foam is a material made by polymerizing and foaming isocyanates and hydroxyl compounds. Polyurethane foam has excellent heat insulation performance, which can reduce energy loss and improve the energy efficiency of buildings; it can also effectively block the transmission of noise and has excellent performance in many aspects, but there are also some disadvantages in terms of heat resistance and flame retardancy: in a high-temperature environment, polyurethane foam may melt, carbonize or produce toxic smoke, and it is easy to burn. In case of a fire, polyurethane foam may assist combustion and produce flames and toxic gases.

[0003] Therefore, it is necessary to develop a flame-retardant polyurethane foam material to meet the application of polyurethane foam materials. Summary of the Invention

[0004] The purpose of the present invention is to provide a flame-retardant polyurethane foam material and a preparation method thereof, and the prepared polyurethane foam material has excellent flame retardancy and high temperature resistance.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A flame-retardant polyurethane foam material, comprising component A and component B. By weight, component A includes the following raw materials: 20-50 parts of polyether polyol 1, 10-30 parts of polyether polyol 2, 5-10 parts of polyether polyol 3, 5-20 parts of crosslinking agent, 0.5-2 parts of catalyst, 0.5-5 parts of foaming agent, 0.5-2 parts of antioxidant, 5-20 parts of flame retardant and 5-10 parts of filler; component B is diphenylmethane diisocyanate;

[0007] Among them, the preparation process of the flame retardant is as follows:

[0008] Mix expanded graphite powder with a zirconium nitrate solution with a mass fraction of 2-4% and stir evenly. After standing for 24 hours, centrifuge, remove the aqueous phase, and then dry in a vacuum drying oven at 95 °C for 5 hours to obtain mixture A. Under a nitrogen atmosphere, roast mixture A at 270-320 °C for 5-8 hours, and after roasting, naturally cool to room temperature to obtain mixture B, where the dosage ratio of the zirconium nitrate solution to the expanded graphite powder is 100 mL: (30-45) g;

[0009] Mix mixture B, deionized water, and boric acid with a mass ratio of 20:70:(30 - 45) evenly, stir at a speed of 400 r / min at 37 - 42 °C for 5 - 7 h, filter, and then dry the product at 80 °C for 8 h. Under nitrogen protection, heat the dried mixture to 600 - 800 °C and perform heat treatment for 2 h to obtain the flame retardant;

[0010] The preparation process of the filler is as follows:

[0011] Ball mill hafnium carbide and silica aerogel with a mass ratio of 1:(1 - 3) at a speed of 400 r / min for 4 h, then dry in a vacuum drying oven at 85 °C for 8 - 12 h to obtain mixture C; under a nitrogen atmosphere, calcine mixture C at 150 - 155 °C for 1 - 2 h, and after the calcination ends, naturally cool to room temperature to obtain mixture D. At room temperature, place mixture D in a KH560 solution with a mass fraction of 5 - 10% and stir at a speed of 350 r / min for 2 - 4 h, where the solution is a mixture of deionized water and ethanol with a volume ratio of 10:8, to prepare the filler.

[0012] As a preferred technical solution of the present invention, the mass ratio of component A to component B is 100:(80 - 200).

[0013] As a preferred technical solution of the present invention, polyether polyol 1 has a functionality of 3 and a molecular weight of 5000, and is one of NJ - 330N, CHE - 330N, EP - 330N(G); polyether polyol 2 is NJ - 8348, has a functionality of 4.2, and a molecular weight of 480; polyether polyol 3 has a functionality of 2 and a molecular weight of 1000, and is one of NJ - 210, CHE - 210.

[0014] As a preferred technical solution of the present invention, the cross - linker is one or more of ethylene glycol, 1,4 - butanediol, and glycerol.

[0015] As a preferred technical solution of the present invention, the catalyst is one of dibutyltin diacetate and dibutyltin dilaurate.

[0016] As a preferred technical solution of the present invention, the blowing agent is one of water, 141b, and dichloromethane.

[0017] As a preferred technical solution of the present invention, the antioxidant is one of dilauryl thiodipropionate and pentaerythritol tetrakis(3 - laurylthiopropionate).

[0018] As a preferred technical solution of the present invention, the dosage ratio of mixture D to the KH560 solution is 2 g:(30 - 45) mL.

[0019] A preparation method of a flame-retardant polyurethane foam material, comprising the following steps:

[0020] S1. According to parts by weight, the raw materials in component A are sequentially added into a stirring kettle, stirred at a speed of 1000 - 1500 rpm at normal temperature for 2 - 3.5 h, and then vacuumed to remove air to obtain slurry A;

[0021] S2. Component B is stirred at a speed of 1000 - 1500 rpm at normal temperature for 1 h, and then vacuumed to remove air to obtain slurry B;

[0022] S3. At 20 - 30 °C, slurry A and slurry B are stirred at a speed of 1200 - 2000 rpm according to the mass ratio for 2 - 4 h to obtain a mixture, and then the mixture is evenly poured into a mold at a temperature of 40 - 60 °C, the mold is closed and cured for 10 - 120 min and then opened to obtain the polyurethane foam material;

[0023] S4. The polyurethane foam material is impregnated in an ammonium polyphosphate solution with a mass fraction of 4 - 7% for 0.5 h, taken out and dried at 60 °C for 4 h to obtain the flame-retardant polyurethane foam material.

[0024] In a high-temperature environment, expandable graphite can rapidly expand to form a thick carbonized layer, which has excellent heat insulation and oxygen isolation properties and can effectively prevent the further spread of fire. In the present invention, expandable graphite powder is used as a flame retardant. After the expandable graphite powder is impregnated with a zirconium nitrate solution and calcined, expandable graphite doped with zirconium is obtained. When the zirconium-containing expandable graphite is heated at high temperature, zirconium ions can catalyze the formation of a more stable and dense carbon layer from the polymer or carbon-based material around the graphite. This carbon layer can effectively isolate oxygen and heat, thereby slowing down or preventing the combustion reaction from proceeding and achieving an excellent flame retardant effect.

[0025] As an inorganic substance, zirconium can form a physical barrier layer in expandable graphite. These barrier layers can prevent the spread of fire and heat and reduce the flammability of the material. At the same time, the presence of zirconium particles can also increase the thermal stability and mechanical strength of the material, making it more difficult to burn in a fire.

[0026] Continue to mix expandable graphite and boric acid evenly, treat them by solution impregnation, and then under the protection of an inert gas, boron elements can be evenly doped into expandable graphite through high-temperature heat treatment, thereby adding the flame-retardant and high-temperature-resistant element boron to obtain modified expandable graphite. When boron elements are doped into expandable graphite, they can play a role in the carbon layer formed after the expansion of graphite, further enhancing the flame retardant performance of the carbon layer. Modified expandable graphite can form a more perfect and stable carbon layer structure in a fire, thereby more effectively preventing the spread of fire and heat transfer and further improving the flame retardant effect.

[0027] Silica aerogel is a porous material with extremely high porosity and specific surface area. Hafnium carbide is a material with an extremely high melting point and can withstand temperatures approaching 4000 degrees Celsius. Mixing hafnium carbide with silica aerogel can significantly increase the overall melting point of the mixture, thereby enhancing its high-temperature resistance.

[0028] Using the silane coupling agent KH560 can act as a bridge to enhance the interfacial bonding force between hafnium carbide and silica aerogel, improve the dispersibility and compatibility of the filler in the material. And KH560 can improve the wettability of the surfaces of hafnium carbide and silica aerogel, making it easier to form a tight bond with other materials, which helps to achieve better infiltration and mixing effects of the filler during the preparation of polyurethane materials.

[0029] Advantages of the present invention:

[0030] In the present invention, a polyurethane foam material with excellent high-temperature resistance and flame retardancy is prepared by the reaction of polyether polyol with a crosslinking agent and isocyanate, and by adding a flame retardant, a filler, and other additives. And finally, the flame retardancy of the polyurethane foam material is further improved by impregnation treatment with an ammonium polyphosphate aqueous solution. Specific embodiments

[0031] To further illustrate the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following examples are used to elaborate in detail on the specific embodiments, structures, features, and effects according to the present invention.

[0032] In the following examples and comparative examples:

[0033] The functionality of polyether polyol 1 is 3, the molecular weight is 5000, and it is NJ-330N; polyether polyol 2 is NJ-8348, the functionality is 4.2, and the molecular weight is 480; the functionality of polyether polyol 3 is 2, the molecular weight is 1000, and it is NJ-210; diphenylmethane diisocyanate is PM200 from Wanhua Chemical.

[0034] Expanded graphite: Purchased from Wuhan Jiyesheng Chemical Co., Ltd., product number: A00375;

[0035] Zirconium nitrate: Purchased from Shanghai Macklin Biochemical Co., Ltd., product number: Z822551;

[0036] Boric acid: Purchased from Shanghai Aladdin Biochemical Technology Co., Ltd., product number: B111592;

[0037] Hafnium carbide: Purchased from Anhui Kerun Nano Technology Co., Ltd.;

[0038] Silica aerogel: Purchased from Shanghai Jiader Chemical Technology Co., Ltd.;

[0039] KH560: Purchased from Jinan ShanHai Chemical Technology Co., Ltd., product number: OLJ01;

[0040] Ethylene glycol: Purchased from Shandong Zhengxing New Materials Co., Ltd.;

[0041] Dibutyltin dilaurate: Purchased from Wuhan Jiyesheng Chemical Co., Ltd.;

[0042] Dilauryl thiodipropionate: Purchased from Hubei Guangao Biotechnology Co., Ltd., product number: GA6558 - 9;

[0043] Ammonium polyphosphate: Purchased from Shandong Yukang Chemical Co., Ltd.

[0044] Example 1

[0045] Preparation of flame retardant:

[0046] Mix expanded graphite powder with a 2% zirconium nitrate solution by mass fraction and stir evenly. After standing for 24 h, centrifuge, remove the aqueous phase, and then dry in a vacuum drying oven at 95 °C for 5 h to obtain mixture A. Under a nitrogen atmosphere, calcine mixture A at 270 °C for 5 h, and after the calcination is completed, naturally cool to room temperature to obtain mixture B, where the dosage ratio of zirconium nitrate solution to expanded graphite powder is 100 mL:10 g;

[0047] Mix mixture B, deionized water, and boric acid with a mass ratio of 20:70:30 evenly, stir at a speed of 400 r / min at 37 °C for 5 h, filter, and then dry the product at 80 °C for 8 h. Under nitrogen protection, heat the dried mixture to 600 °C and perform heat treatment for 2 h to obtain the flame retardant.

[0048] Preparation of filler:

[0049] Ball - mill hafnium carbide and silica aerogel with a mass ratio of 1:1 at a speed of 400 r / min for 4 h, and then dry in a vacuum drying oven at 85 °C for 8 h to obtain mixture C; Under a nitrogen atmosphere, calcine mixture C at 150 °C for 1 h, and after the calcination is completed, naturally cool to room temperature to obtain mixture D. At room temperature, place mixture D in a 5% KH560 solution and stir at a speed of 350 r / min for 2 h, where the solution is a mixture of deionized water and ethanol with a volume ratio of 10:8, to prepare the filler, and the dosage ratio of mixture D to KH560 solution is 2 g:10 mL.

[0050] Preparation of flame - retardant polyurethane foam material:

[0051] S1. According to the weight parts, add 20 parts of polyether polyol 1, 10 parts of polyether polyol 2, 5 parts of polyether polyol 3, 5 parts of ethylene glycol, 0.5 part of dibutyltin dilaurate, 0.5 part of water, 0.5 part of dilauryl thiodipropionate, 5 parts of flame retardant and 5 parts of filler into the stirring kettle in sequence. Stir at a speed of 1000 rpm at room temperature for 2 - 3.5 h, and then evacuate to remove air to obtain slurry A;

[0052] S2. Stir diphenylmethane diisocyanate at a speed of 1000 rpm at room temperature for 1 h, and evacuate to remove air to obtain slurry B;

[0053] S3. At 20 °C, stir slurry A and slurry B with a mass ratio of 100:80 at a speed of 1200 rpm for 2 h to obtain a mixture. Then pour the mixture evenly into a mold at a temperature of 40 °C, close the mold and cure for 10 min, and then open the mold to obtain the polyurethane foam material;

[0054] S4. Immerse the polyurethane foam material in a 4% ammonium polyphosphate solution for 0.5 h, take it out and dry it at 60 °C for 4 h to obtain the flame - retardant polyurethane foam material.

[0055] Example 2

[0056] Preparation of flame retardant:

[0057] Mix expanded graphite powder with a 3% zirconium nitrate solution and stir evenly. After standing for 24 h, centrifuge, remove the aqueous phase, and then dry in a vacuum drying oven at 95 °C for 5 h to obtain mixture A. Under a nitrogen atmosphere, calcine mixture A at 300 °C for 5 - 8 h, and after the calcination is completed, cool it naturally to room temperature to obtain mixture B, where the dosage ratio of zirconium nitrate solution to expanded graphite powder is 100 mL:13 g;

[0058] Mix mixture B, deionized water and boric acid with a mass ratio of 20:70:37 evenly, stir at a speed of 400 r / min at 39 °C for 6 h, filter, and then dry the product at 80 °C for 8 h. Under nitrogen protection, heat the dried mixture to 700 °C and perform heat treatment for 2 h to obtain the flame retardant.

[0059] Preparation of filler:

[0060] Hafnium carbide and silica aerogel with a mass ratio of 1:2 were ball-milled in a ball mill at a speed of 400 r / min for 4 h, and then dried in a vacuum drying oven at 85 °C for 10 h to obtain mixture C; in a nitrogen atmosphere, mixture C was calcined at 152 °C for 1.5 h, and after the calcination was completed, it was naturally cooled to room temperature to obtain mixture D. At room temperature, mixture D was placed in a KH560 solution with a mass fraction of 8% and stirred at a speed of 350 r / min for 3 h, where the solution was deionized water and ethanol with a volume ratio of 10:8, and the filler was prepared. The dosage ratio of mixture D to the KH560 solution was 2 g:13 mL.

[0061] Preparation of flame-retardant polyurethane foam:

[0062] S1. According to the weight parts, 35 parts of polyether polyol 1, 20 parts of polyether polyol 2, 6 parts of polyether polyol 3, 10 parts of 1,4-butanediol, 1 part of dibutyltin dilaurate, 3 parts of water, 1 part of dilauryl thiodipropionate, 10 parts of flame retardant and 8 parts of filler were successively added to a stirring kettle, and stirred at a speed of 1300 rpm for 3 h at room temperature. After evacuating to remove air, slurry A was obtained;

[0063] S2. Diphenylmethane diisocyanate was stirred at a speed of 1300 rpm for 1 h at room temperature, and air was evacuated to obtain slurry B;

[0064] S3. At 25 °C, slurry A and slurry B with a mass ratio of 100:130 were stirred at a speed of 1500 rpm for 3 h to obtain a mixture, and then the mixture was evenly poured into a mold at a temperature of 50 °C. After the mold was closed and cured for 80 min, the mold was opened to obtain polyurethane foam;

[0065] S4. The polyurethane foam was impregnated in a polyammonium phosphate solution with a mass fraction of 5% for 0.5 h, taken out and dried at 60 °C for 4 h to obtain the flame-retardant polyurethane foam.

[0066] Example 3

[0067] Preparation of flame retardant:

[0068] Expanded graphite powder was mixed and stirred evenly with a zirconium nitrate solution with a mass fraction of 4%, left standing for 24 h, then centrifuged, the aqueous phase was removed, and dried in a vacuum drying oven at 95 °C for 5 h to obtain mixture A. In a nitrogen atmosphere, mixture A was calcined at 320 °C for 8 h, and after the calcination was completed, it was naturally cooled to room temperature to obtain mixture B, where the dosage ratio of the zirconium nitrate solution to the expanded graphite powder was 100 mL:15 g;

[0069] Mix mixture B, deionized water, and boric acid with a mass ratio of 20:70:45 evenly, stir at a speed of 400 r / min at 42 °C for 7 h, filter, and then dry the product at 80 °C for 8 h. Under nitrogen protection, heat the dried mixture to 800 °C and heat-treat it for 2 h to obtain the flame retardant.

[0070] Preparation of the filler:

[0071] Mix hafnium carbide and silica aerogel with a mass ratio of 1:3 and ball-mill them at a speed of 400 r / min for 4 h in a ball mill, then dry them in a vacuum drying oven at 85 °C for 12 h to obtain mixture C; under a nitrogen atmosphere, calcine mixture C at 155 °C for 2 h, and after the calcination is completed, naturally cool it to room temperature to obtain mixture D. At room temperature, place mixture D in a 10% KH560 solution and stir at a speed of 350 r / min for 4 h. The solution is deionized water and ethanol with a volume ratio of 10:8, and the filler is prepared. The dosage ratio of mixture D to the KH560 solution is 2 g:15 mL.

[0072] Preparation of the flame-retardant polyurethane foam material:

[0073] S1. According to the weight parts, sequentially add 50 parts of polyether polyol 1, 30 parts of polyether polyol 2, 10 parts of polyether polyol 3, 20 parts of ethylene glycol, 2 parts of dibutyltin dilaurate, 5 parts of water, 2 parts of dilauryl thiodipropionate, 20 parts of the flame retardant, and 10 parts of the filler into a stirring kettle, stir at a speed of 1500 rpm at room temperature for 3.5 h, and evacuate to remove air to obtain slurry A;

[0074] S2. Stir diphenylmethane diisocyanate at a speed of 1500 rpm at room temperature for 1 h, and evacuate to remove air to obtain slurry B;

[0075] S3. At 30 °C, stir slurry A and slurry B with a mass ratio of 100:200 at a speed of 2000 rpm for 4 h to obtain a mixture, then pour the mixture evenly into a mold at a temperature of 60 °C, close the mold and cure for 120 min, and then open the mold to obtain the polyurethane foam material;

[0076] S4. Immerse the polyurethane foam material in a 7% ammonium polyphosphate solution for 0.5 h, take it out and dry it at 60 °C for 4 h to obtain the flame-retardant polyurethane foam material.

[0077] Comparative Example 1

[0078] The difference between Comparative Example 1 and Example 1 is that in Comparative Example 1, the flame retardant was not treated with boric acid during the preparation process, and the rest of the operations were the same.

[0079] Comparative Example 2

[0080] The difference between Comparative Example 2 and Example 1 is that in Comparative Example 2, the flame retardant is expanded graphite without any modification treatment, and the remaining operations are the same.

[0081] Comparative Example 3

[0082] The difference between Comparative Example 3 and Example 1 is that in Comparative Example 3, the filler is not treated with KH560 solution during the preparation process, and the remaining operations are the same.

[0083] Comparative Example 4

[0084] The difference between Comparative Example 4 and Example 1 is that in Comparative Example 4, the filler is only silica aerogel, and the remaining operations are the same.

[0085] Performance test:

[0086] 1. Flame retardancy:

[0087] Oxygen index: It is carried out according to GB / T2406.1-2008. Among them, a high oxygen index indicates that the material is not easy to burn, and a low oxygen index indicates that the material is easy to burn. Generally, it is considered that the oxygen index < 22% belongs to flammable materials, the oxygen index between 22~27% belongs to combustible materials, and the oxygen index > 27% belongs to flame-retardant materials. The specimen with length×width×height=(100×100×25)mm, and the results are shown in Table 1 below:

[0088] Combustion performance: It is tested according to GB / T 8410-2006. The specimen size is width 10mm, length 365mm, and thickness 10mm;

[0089] Density: Refer to GB / T 4472-1984, the specimen with length×width×height=(100×100×25)mm;

[0090] The obtained test results are shown in Table 1 below:

[0091] Table 1

[0092]

[0093] High temperature resistance:

[0094] The polyurethane foam materials obtained in Examples 1-3 and Comparative Examples 1-3 are made into specimens with length×width×height=(100×100×25)mm. Refer to GB / T 24451-2020, GB / T 6344-2008, and GB / T 9640-2008 to test the tensile strength, elongation at break of the material and the change rate after heat storage (treated at 170℃ for 140h);

[0095] The obtained test results are shown in Table 2 below:

[0096] Table 2

[0097]

[0098] Moreover, the temperature resistance tests of Examples 1-3 were carried out with reference to the GB / T 9640 standard, and the obtained result was 140 °C × 7 days. The examples can maintain excellent performance under high-temperature conditions; according to the above data, it can be seen that the polyurethane foam material prepared by the present invention has excellent flame retardancy and high-temperature resistance.

[0099] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content without departing from the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A flame-retardant polyurethane foam material, characterized in that, It includes Component A and Component B. By weight parts, Component A includes the following raw materials: 20 - 50 parts of polyether polyol 1, 10 - 30 parts of polyether polyol 2, 5 - 10 parts of polyether polyol 3, 5 - 20 parts of crosslinking agent, 0.5 - 2 parts of catalyst, 0.5 - 5 parts of foaming agent, 0.5 - 2 parts of antioxidant, 5 - 20 parts of flame retardant, and 5 - 10 parts of filler; Component B is diphenylmethane diisocyanate; The preparation process of the flame retardant is as follows: Mix expanded graphite powder with zirconium nitrate solution with a mass fraction of 2 - 4% and stir evenly. After standing for 24 h, centrifuge, remove the aqueous phase, and then dry in a vacuum drying oven at 95 °C for 5 h to obtain mixture A. Under a nitrogen atmosphere, calcine mixture A at 270 - 320 °C for 5 - 8 h. After the calcination is completed, naturally cool to room temperature to obtain mixture B, where the dosage ratio of zirconium nitrate solution to expanded graphite powder is 100 mL : (30 - 45) g; Mix mixture B, deionized water, and boric acid with a mass ratio of 20 : 70 : (30 - 45) evenly, stir at a speed of 400 r / min at 37 - 42 °C for 5 - 7 h, dry the product at 80 °C for 8 h. Under nitrogen protection, heat the dried mixture to 600 - 800 °C and perform heat treatment for 2 h to obtain the flame retardant; The preparation process of the filler is as follows: Ball - mill hafnium carbide and silica aerogel with a mass ratio of 1 : (1 - 3) at a speed of 400 r / min for 4 h in a ball mill, and then dry in a vacuum drying oven at 85 °C for 8 - 12 h to obtain mixture C. Under a nitrogen atmosphere, calcine mixture C at 150 - 155 °C for 1 - 2 h. After the calcination is completed, naturally cool to room temperature to obtain mixture D. At room temperature, place mixture D in a KH560 solution with a mass fraction of 5 - 10% and stir at a speed of 350 r / min for 2 - 4 h, where the solution is a mixture of deionized water and ethanol with a volume ratio of 10 : 8, to prepare the filler; The preparation of the flame - retardant polyurethane foam material includes the following steps: S1. According to the weight parts, add the raw materials in Component A into a stirring kettle in sequence, stir at a speed of 1000 - 1500 rpm at normal temperature for 2 - 3.5 h, evacuate to remove air to obtain slurry A; S2. Stir Component B at a speed of 1000 - 1500 rpm at normal temperature for 1 h, evacuate to remove air to obtain slurry B; S3. At 20 - 30 °C, stir slurry A and slurry B at a speed of 1200 - 2000 rpm according to the mass ratio for 2 - 4 h to obtain a mixture, then pour the mixture evenly into a mold at a temperature of 40 - 60 °C, close the mold and cure for 10 - 120 min, and then open the mold to obtain polyurethane foam material; S4. Immerse the polyurethane foam material in a polyammonium phosphate solution with a mass fraction of 4 - 7% for 0.5 h, take it out and dry at 60 °C for 4 h to obtain the flame - retardant polyurethane foam material.

2. The flame-retardant polyurethane foam material according to claim 1, characterized in that, The mass ratio of Component A to Component B is 100 : (80 - 200).

3. The flame-retardant polyurethane foam material according to claim 1, wherein The functionality of the polyether polyol 1 is 3, and the molecular weight is 5000, which is one of NJ-330N, CHE-330N, and EP-330N (G); the polyether polyol 2 is NJ-8348, with a functionality of 4.2 and a molecular weight of 480; the functionality of the polyether polyol 3 is 2, and the molecular weight is 1000, which is one of NJ-210 and CHE-210.

4. The flame-retardant polyurethane foam material according to claim 1, wherein The crosslinking agent is one or more of ethylene glycol, 1,4-butanediol, and glycerol.

5. The flame-retardant polyurethane foam material according to claim 1, wherein The catalyst is one of dibutyltin diacetate and dibutyltin dilaurate.

6. The flame-retardant polyurethane foam material according to claim 1, wherein The blowing agent is one of water, 141b, and dichloromethane.

7. The flame-retardant polyurethane foam material according to claim 1, characterized in that, The antioxidant is one of dilauryl thiodipropionate and pentaerythritol tetrakis(3-laurylthiopropionate).

8. The flame-retardant polyurethane foam material according to claim 1, wherein The dosage ratio of the mixture D to the KH560 solution is 2 g : (30 - 45) mL.

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