A dual-component flame retardant, a preparation method and application thereof

Abstract

This invention provides a two-component flame retardant, its preparation method, and its application, relating to the technical field of flame retardants. The two-component flame retardant comprises component A and component B; wherein component A comprises starch phosphate ester, calcium chloride, surfactant, propylene glycol, aerogel, and water; wherein component B comprises bone glue and water. This two-component flame retardant is environmentally friendly, non-corrosive, and has no impact on plant growth. It can be used on trees, leaves, paper, walls, and insulation boards, exhibiting excellent performance. It demonstrates good weather resistance when used in rainy seasons in the south, cold regions in the north, and hot summers, without affecting product quality while providing excellent protection.

Description

Technical Field

[0001] This invention relates to the technical field of flame retardants, and in particular to a two-component flame retardant, its preparation method, and its application. Background Technology

[0002] Forest and grassland fires are natural disasters characterized by their sudden onset, high destructiveness, and difficulty in handling and rescue. Once a fire breaks out, the losses to humans and ecosystems are incalculable, and the consequences are unimaginable. To preserve more or more valuable forests and grasslands, firebreaks are created during firefighting to completely separate burned areas from unburned areas; simultaneously, flame retardants are sprayed on the surface of combustible materials to make them difficult or non-combustible, thus preventing the fire from spreading further.

[0003] However, ordinary fire extinguishing retardants are rarely effective. Water-based fire retardants have lower surface tension and better fluidity, but most of the water often runs away before it can be used, resulting in low utilization and poor adhesion. Combustible materials can easily reignite under high temperatures or smoldering conditions. Foam extinguishing agents, due to their density, are easily blown away by flame blasts and strong winds. Dry powder extinguishing agents cause significant environmental pollution, have poor flame retardant properties, are easily dispersed by the wind during spraying, and are difficult to adhere to the protected object.

[0004] For example, CN101037601A discloses a fire retardant liquid specifically for forest and grassland fire prevention, which is a water-based emulsion made from the following solid and liquid raw materials: alkaline earth metal salts, boric acid, refined quartz powder, powdered chlorinated paraffin, hollow microspheres, penetrant, urea, hydrosol, and activated carbon from animal bones. However, it still has the following shortcomings: 1. Water resistance. Given the abundant rainfall in the south, whether the fire retardant liquid sprayed on plants after being rained on is effective in terms of water resistance is not investigated. 2. Heat resistance. In hot and humid regions, whether the fire retardant liquid sprayed on plants after being exposed to sunlight will lose its heat resistance is not investigated. 3. Low-temperature resistance. In cold northern regions, whether the fire retardant liquid sprayed on plants after being frozen by rain will lose its low-temperature resistance is not investigated. 4. Limited application area: It can only be used in forests and grasslands and cannot be used in the construction field.

[0005] Therefore, there is an urgent need to research a flame retardant with excellent water resistance, heat resistance, and freeze resistance, and to broaden its application areas. This would be more conducive to solving the difficulties in product performance, reducing safety hazards, and ensuring human life safety, property safety, and ecological balance.

[0006] In view of this, the present invention is hereby proposed. Summary of the Invention

[0007] The purpose of this invention is to provide a two-component flame retardant, its preparation method, and its application. The two-component flame retardant comprises component A and component B; wherein component A comprises starch phosphate ester, calcium chloride, surfactant, propylene glycol, aerogel, and water; and wherein component B comprises bone glue and water. The two-component flame retardant of this invention exhibits excellent water resistance, heat resistance, low-temperature resistance, and fire retardant properties; and expands its application areas to include building exterior walls, effectively reducing safety hazards.

[0008] In order to achieve the above-mentioned objectives of the present invention, the following technical solution is adopted:

[0009] In a first aspect, the present invention provides a two-component flame retardant, the two-component flame retardant comprising component A and component B;

[0010] Component A includes starch phosphate, calcium chloride, surfactant, propylene glycol, aerogel, and water;

[0011] Component B includes bone glue and water.

[0012] In this invention, the components of the two-component flame retardant work together to enhance each other's performance, thereby significantly improving the flame retardant's water resistance, heat resistance, low-temperature resistance, and fire resistance.

[0013] The added starch phosphate ester is a bio-based flame retardant that improves the fire resistance and adhesion of the flame retardant by altering the thermal stability and pyrolysis process of starch itself. It is also a novel modified starch mixture, using phosphoric acid and urea to modify natural starch, attaching phosphorus and nitrogen elements to the starch molecular chain to change the chemical properties of the starch, making it a flame-retardant gel containing an acid source, carbon source, and gas source. It also has the property of expanding into carbon.

[0014] The added aerogel has a network structure and low density, making it an effective thermal insulation material. It can not only improve the high temperature resistance, but also help plants maintain a stable growth environment under extreme temperature conditions, while removing harmful substances from plants and maintaining the structural integrity and healthy growth of plants.

[0015] The added surfactant has excellent surface activity, which can reduce the surface tension of the flame retardant, obtain excellent adhesion and water resistance, and thus improve the water resistance of the flame retardant.

[0016] The added propylene glycol, when mixed with water, lowers the freezing point of the flame retardant, thus providing effective antifreeze protection. It remains liquid at low temperatures and does not freeze, ensuring normal use and giving the flame retardant low-temperature resistance.

[0017] Preferably, component A comprises, by weight parts: 50-65 parts starch phosphate, 10-15 parts calcium chloride, 0.3-0.7 parts surfactant, 0.5-1.0 parts propylene glycol, 3-10 parts aerogel, and 15-25 parts water.

[0018] In component A, the content of starch phosphate is 50-65 parts, for example, it can be 50 parts, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58 parts, 59 parts, 60 parts, 61 parts, 62 parts, 63 parts, 64 parts, 65 parts, etc. (Wherein, the starch phosphate is a yellow liquid material.)

[0019] In component A, the content of calcium chloride is 10 to 15 parts, for example, it can be 10 parts, 10.5 parts, 11 parts, 11.5 parts, 12 parts, 12.5 parts, 13 parts, 13.5 parts, 14 parts, 14.5 parts, 15 parts, etc. (Wherein, calcium chloride is a white crystalline solid, it can be calcium chloride dihydrate.)

[0020] In component A, the content of surfactant is 0.3 to 0.7 parts, for example, it can be 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, 0.5 parts, 0.55 parts, 0.6 parts, 0.65 parts, 0.7 parts, etc.

[0021] In component A, the content of propylene glycol is 0.5 to 1.0 parts, for example, it can be 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1.0 parts, etc. (Wherein, the propylene glycol can be industrial grade 1,2-propylene glycol with a content ≥99.7%).

[0022] In component A, the content of aerogel is 3 to 10 parts, for example, it can be 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.5 parts, 8 parts, 8.5 parts, 9 parts, 9.5 parts, 10 parts, etc.

[0023] In component A, the water content is 15 to 25 parts, for example, it can be 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, etc.

[0024] Preferably, the pH of the starch phosphate is 6 to 8, for example, it can be 6, 6.5, 7, 7.5, 8, etc.

[0025] Preferably, the solid content of the starch phosphate is 30-50 wt%, for example, it can be 30 wt%, 32 wt%, 35 wt%, 38 wt%, 40 wt%, 42 wt%, 45 wt%, 48 wt%, 50 wt%, etc.

[0026] Preferably, the surfactant is a water-resistant nonionic surfactant.

[0027] Preferably, the water-resistant nonionic surfactant is selected from any one or a combination of at least two of perfluoroalkyl polyoxyethylene ethers, polyether-modified polysiloxanes, or fluoroalkyl polysiloxanes, and more preferably... Polyether modified polysiloxane .

[0028] Preferably, the surface tension of the surfactant is 20-30 mN / m, for example, it can be 20 mN / m, 21 mN / m, 22 mN / m, 23 mN / m, 24 mN / m, 25 mN / m, 26 mN / m, 27 mN / m, 28 mN / m, 29 mN / m, 30 mN / m, etc.

[0029] Preferably, the aerogel is silica nano-aerogel powder particles.

[0030] Preferably, component B comprises, by weight, 15-30 parts of bone glue and 70-85 parts of water.

[0031] In component B, the content of bone glue is 15 to 30 parts, for example, it can be 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, etc.

[0032] In component B, the water content is 70 to 85 parts, for example, it can be 70 parts, 71 parts, 72 parts, 73 parts, 74 parts, 75 parts, 76 parts, 77 parts, 78 parts, 79 parts, 80 parts, 81 parts, 82 parts, 83 parts, 84 parts, 85 parts, etc.

[0033] Preferably, the bone glue is selected from animal bone glue (the main components are gelatin and protein).

[0034] Preferably, the mass ratio of component A to component B is (3-5):1, for example, it can be 3:1, 3.5:1, 4:1, 4.5:1, 5:1, etc., preferably 4:1.

[0035] In a second aspect, the present invention provides a method for preparing a two-component flame retardant as described in the first aspect, the method comprising the following steps:

[0036] Starch phosphate, calcium chloride, surfactant, propylene glycol, aerogel, and water are mixed and stirred to obtain component A.

[0037] Dissolve the bone glue in water and stir to obtain component B.

[0038] It should be noted that the flame retardant of the present invention is a two-component flame retardant. In the preparation process, component A and component B are prepared separately, and then component A and component B are mixed together during use.

[0039] Preferably, during the preparation of component A, the stirring speed is 300-600 rpm, for example, 300 rpm, 350 rpm, 400 rpm, 450 rpm, 500 rpm, 550 rpm, 600 rpm, etc.

[0040] Preferably, during the preparation of component A, the stirring time is 15 to 20 minutes, for example, 15 minutes, 16 minutes, 17 minutes, 18 minutes, 19 minutes, 20 minutes, etc.

[0041] Preferably, the dissolution temperature of the bone glue is 20-60℃, for example, it can be 20℃, 25℃, 30℃, 35℃, 40℃, 45℃, 50℃, 55℃, 60℃, etc.

[0042] Preferably, the dissolution time of the bone glue is 0.5 to 5 hours, for example, 0.5 hours, 1 hour, 1.5 hours, 2 hours, 2.5 hours, 3 hours, 3.5 hours, 4 hours, 4.5 hours, 5 hours, etc.

[0043] Preferably, during the preparation of component B, the stirring speed is 200-500 rpm, for example, 200 rpm, 250 rpm, 300 rpm, 350 rpm, 400 rpm, 450 rpm, 500 rpm, etc.

[0044] Preferably, during the preparation of component B, the stirring time is 5 to 10 minutes, for example, 5 minutes, 6 minutes, 7 minutes, 8 minutes, 9 minutes, 10 minutes, etc.

[0045] Thirdly, the present invention provides the application of the two-component flame retardant as described in the first aspect in the flame retardancy of plants, walls or insulation boards.

[0046] Fourthly, the present invention provides a method of using the two-component flame retardant as described in the first aspect, the method comprising the following steps:

[0047] The components A and B are mixed to obtain a mixture, which is then diluted with water to obtain a diluted solution of the two-component flame retardant.

[0048] A diluted solution of the two-component flame retardant is sprayed onto the surface of the substrate material using a sprayer to form a flame retardant layer.

[0049] Preferably, the mass ratio of component A to component B is (3-5):1, for example, it can be 3:1, 3.5:1, 4:1, 4.5:1, 5:1, etc., preferably 4:1.

[0050] Preferably, the mass ratio of the mixture to water is 10:(3-4), for example, it can be 10:3, 10:3.1, 10:3.2, 10:3.3, 10:3.4, 10:3.5, 10:3.6, 10:3.7, 10:3.8, 10:3.9, 10:4, etc., and preferably 10:3.5.

[0051] Preferably, the matrix material includes any one of plants, walls, or insulation boards.

[0052] Preferably, the spraying dosage of the diluted two-component flame retardant is 0.02–0.04 mL / cm³. 2 For example, it could be 0.02 mL / cm 2 0.025mL / cm 2 0.03 mL / cm 2 0.035 mL / cm 2 0.04 mL / cm 2 wait.

[0053] Compared with the prior art, the present invention has the following beneficial effects:

[0054] (1) The two-component flame retardant of the present invention has excellent water resistance, heat resistance, low temperature resistance and fire resistance; it can be used as a fire retardant for plants in forests and grasslands.

[0055] (2) When the two-component flame retardant described in this invention is used in the field of building exterior walls, it can improve the flame retardant performance of walls and insulation boards. After the flame retardant is sprayed onto the walls and insulation boards, a carbonized protective layer will be formed on the surface when exposed to fire, which can effectively retard flames and form a second line of defense, thus achieving double flame retardant protection. Detailed Implementation

[0056] Unless otherwise defined herein, the scientific and technical terms used in conjunction with this invention shall have the meanings commonly understood by one of ordinary skill in the art. The meaning and scope of terms shall be clear; however, in any case of potential ambiguity, the definitions provided herein shall prevail over any dictionary or foreign definitions. In this application, unless otherwise stated, the use of "or" means "and / or". Furthermore, the use of the term "comprising" and other forms is non-limiting.

[0057] It should be noted that specific details are set forth in the following description to provide a full understanding of the invention. However, the invention can be practiced in many ways other than those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0058] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] The present invention will be further illustrated below through embodiments. Unless otherwise specified, the materials used in the embodiments are the same.

[0060] The raw material parameters for the following embodiments are shown below:

[0061] Starch phosphate is a yellow liquid material with a pH of 7 and a solid content of 40%.

[0062] Calcium chloride is calcium chloride dihydrate, a white crystalline solid.

[0063] The surfactant is a water-resistant nonionic surfactant (specifically, polyether-modified silicone oil) with a surface tension of 23 mN / m.

[0064] Propylene glycol is industrial grade 1,2-propylene glycol with a content of ≥99.7% and a relative molecular mass of 76.09.

[0065] Aerogel is a silica nano-aerogel powder particle, which is hydrophilic.

[0066] Bone glue is made from animal bones.

[0067] Example 1

[0068] This embodiment provides a two-component flame retardant, which includes component A and component B in a mass ratio of 4:1;

[0069] Component A, by weight, comprises the following components:

[0070]

[0071] Component B, by weight, comprises the following components:

[0072] 15 parts bone glue

[0073] 85 parts water.

[0074] The two-component flame retardant described in this embodiment is prepared according to the following steps:

[0075] Component A: Weigh calcium chloride, surfactant, aerogel, water, propylene glycol and starch phosphate according to the above proportions and add them to a mixer. Stir at a constant speed (400 rpm) until fully mixed. After stirring for 15 minutes, take a sample for testing. If it passes the test, package and store it in the warehouse.

[0076] Component B: Add the bone glue to water according to the above ratio and allow it to dissolve naturally at room temperature for 5 hours. Then, stir it at low speed with a mixer. After stirring at low speed (300 rpm) for 5 minutes, take a sample for testing. If it passes the test, package it and put it into storage.

[0077] Example 2

[0078] This embodiment provides a two-component flame retardant, which includes component A and component B in a mass ratio of 4:1;

[0079] Component A, by weight, comprises the following components:

[0080]

[0081] Component B, by weight, comprises the following components:

[0082] 25 parts bone glue

[0083] 75 parts water.

[0084] The two-component flame retardant described in this embodiment is prepared according to the following steps:

[0085] Component A: Weigh calcium chloride, surfactant, aerogel, water, propylene glycol and starch phosphate according to the above proportions and add them to a mixer. Stir at a constant speed (400 rpm) until fully mixed. After stirring for 20 minutes, take a sample for testing. If it passes the test, package and store it in the warehouse.

[0086] Component B: Add the bone glue to water according to the above ratio and allow it to dissolve naturally at room temperature for 5 hours. Then, stir it at low speed with a mixer. After stirring at low speed (300 rpm) for 10 minutes, take a sample for testing. If it passes the test, package it and put it into storage.

[0087] Example 3

[0088] This embodiment provides a two-component flame retardant, which includes component A and component B in a mass ratio of 4:1;

[0089] Component A, by weight, comprises the following components:

[0090]

[0091] Component B, by weight, comprises the following components:

[0092] 30 parts bone glue

[0093] 70 parts water.

[0094] The two-component flame retardant described in this embodiment is prepared according to the following steps:

[0095] Component A: Weigh calcium chloride, surfactant, aerogel, water, propylene glycol and starch phosphate according to the above proportions and add them to a mixer. Stir at a constant speed (500 rpm) until fully mixed. After stirring for 20 minutes, take a sample for testing. If it passes the test, package and store it in the warehouse.

[0096] Component B: Add the bone glue to water according to the above ratio, heat the water to 60℃ to dissolve for 1 hour, and then stir at low speed with a mixer; after stirring at low speed (400 rpm) for 10 minutes, take a sample for testing, and package and store it after passing the test.

[0097] Example 4

[0098] This embodiment provides a two-component flame retardant, which differs from Embodiment 1 only in that the mass ratio of component A to component B is 3:1, while all other settings are completely consistent with Embodiment 1.

[0099] Example 5

[0100] This embodiment provides a two-component flame retardant, which differs from Embodiment 1 only in that the mass ratio of component A to component B is 5:1, while all other settings are completely consistent with Embodiment 1.

[0101] Example 6

[0102] This embodiment provides a two-component flame retardant, which differs from Embodiment 1 only in that component A includes the following components by weight:

[0103]

[0104] All other settings are exactly the same as in Example 1.

[0105] Example 7

[0106] This embodiment provides a two-component flame retardant, which differs from Embodiment 1 only in that component A includes the following components by weight:

[0107]

[0108] All other settings are exactly the same as in Example 1.

[0109] Example 8

[0110] This embodiment provides a two-component flame retardant, which differs from Embodiment 1 only in that component B comprises the following components by weight:

[0111] 10 parts bone glue

[0112] 90 parts water;

[0113] All other settings are exactly the same as in Example 1.

[0114] Example 9

[0115] This embodiment provides a two-component flame retardant, which differs from Embodiment 1 only in that component B comprises the following components by weight:

[0116] 35 parts bone glue

[0117] 65 parts water;

[0118] All other settings are exactly the same as in Example 1.

[0119] Comparative Example 1

[0120] This comparative example provides a two-component flame retardant, which differs from Example 1 only in that starch phosphate is not added and the water content is increased to 80 parts; all other settings are completely consistent with Example 1.

[0121] Comparative Example 2

[0122] This comparative example provides a two-component flame retardant, which differs from Example 1 only in that starch phosphate is replaced with an equal mass of pentaerythritol phosphate; all other settings are completely consistent with Example 1.

[0123] Comparative Example 3

[0124] This comparative example provides a two-component flame retardant, which differs from Example 1 only in that it does not contain aerogel and the water content is increased to 21.1 parts; all other settings are completely consistent with Example 1.

[0125] Comparative Example 4

[0126] This comparative example provides a two-component flame retardant, which differs from Example 1 only in that the aerogel is replaced with an equal mass of nano-titanium dioxide; all other settings are completely consistent with Example 1.

[0127] Comparative Example 5

[0128] This comparative example provides a two-component flame retardant, which differs from Example 1 only in that it does not contain a water-resistant nonionic surfactant and the water content is increased to 15.3 parts; all other settings are completely the same as in Example 1.

[0129] Comparative Example 6

[0130] This comparative example provides a two-component flame retardant, which differs from Example 1 only in that the water-resistant nonionic surfactant is replaced with an equal mass of sodium dodecylbenzenesulfonate; all other settings are completely consistent with Example 1.

[0131] Comparative Example 7

[0132] This comparative example provides a two-component flame retardant, which differs from Example 1 only in that propylene glycol is replaced with an equal mass of glycerol; all other settings are completely consistent with Example 1.

[0133] Comparative Example 8

[0134] This comparative example provides a two-component flame retardant, which differs from Example 1 only in that calcium chloride is replaced with an equal mass of magnesium chloride; all other settings are completely identical to Example 1.

[0135] Comparative Example 9

[0136] This comparative example provides a two-component flame retardant, which differs from Example 1 only in that bone glue is replaced with an equal mass of xanthan gum; all other settings are exactly the same as in Example 1.

[0137] Test method:

[0138] Test samples: Two-component flame retardants provided in Examples 1-9 and two-component flame retardants provided in Comparative Examples 1-9;

[0139] Test method: (1) Under ambient temperature not lower than 0℃ and relative humidity not higher than 80%RH: use an electric stirrer to weigh and mix component A and component B in proportion, then add 35% water and stir into a liquid state; (2) spray directly onto plants, walls or insulation boards using a sprayer; wherein, the spraying amount is: 0.03mL / cm 2 .

[0140] Test standards are shown in Table 1 below:

[0141] Table 1

[0142]

[0143] The test results are shown in Table 2 below:

[0144] Table 2

[0145]

[0146]

[0147]

[0148]

[0149] The performance test results in Tables 1 and 2 above show that the formulations in Examples 1 to 5 exhibit excellent performance, and the flame retardant of this invention fully meets the standard requirements. This invention can be used in the fields of green plants and building fire protection, possessing excellent adhesion, water resistance, heat resistance, good frost resistance, and superior fire-retardant effect.

[0150] In Comparative Example 1, the formulation lacked starch phosphate, resulting in significantly reduced flame retardancy, adhesion, and storage stability, making it inferior to the performance of the present invention. In Comparative Example 3, the formulation lacked aerogel, leading to poor heat resistance, also inferior to the performance of the present invention. In Comparative Example 5, the formulation lacked surfactant, resulting in poor water resistance, also inferior to the performance of the present invention.

[0151] In summary, the two-component flame retardant of this invention is environmentally friendly, non-corrosive, and has no impact on plant growth. It can be used on trees, leaves, paper, walls, and insulation boards, and the product exhibits excellent performance. It demonstrates good weather resistance when used in rainy seasons in the south, cold regions in the north, and hot summers, without affecting product quality while providing excellent protection.

[0152] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A two-component flame retardant, characterized in that, The two-component flame retardant includes component A and component B, wherein the mass ratio of component A to component B is (3~5):1; Component A, by weight, comprises: 50-65 parts starch phosphate, 10-15 parts calcium chloride, 0.3-0.7 parts surfactant, 0.5-1.0 parts propylene glycol, 3-10 parts aerogel, and 15-25 parts water; Component B, by weight, comprises: 15-30 parts of bone glue and 70-85 parts of water; The starch phosphate ester has a pH of 6-8 and a solid content of 30-50 wt%; the surfactant is a water-resistant nonionic surfactant; the water-resistant nonionic surfactant is selected from any one or a combination of at least two of perfluoroalkyl polyoxyethylene ether, polyether-modified polysiloxane, or fluoroalkyl polysiloxane; the aerogel is silica nano-aerogel powder particles.

2. The two-component flame retardant according to claim 1, characterized in that, The water-resistant nonionic surfactant is a polyether-modified polysiloxane.

3. The two-component flame retardant according to claim 1, characterized in that, The bone glue is selected from animal bone glue.

4. The two-component flame retardant according to claim 1, characterized in that, The mass ratio of component A to component B is 4:

1.

5. A method for preparing a two-component flame retardant according to any one of claims 1 to 4, characterized in that, The preparation method includes the following steps: Starch phosphate, calcium chloride, surfactant, propylene glycol, aerogel, and water are mixed and stirred to obtain component A. Dissolve the bone glue in water and stir to obtain component B.

6. The method for preparing the two-component flame retardant according to claim 5, characterized in that, During the preparation of component A, the stirring speed is 300-600 rpm and the stirring time is 15-20 min; And / or, the dissolution temperature of the bone glue is 20~60℃, and the dissolution time of the bone glue is 0.5~5 h; And / or, during the preparation of component B, the stirring speed is 200~500 rpm and the stirring time is 5~10 min.

7. The application of a two-component flame retardant according to any one of claims 1 to 4 in the flame retardancy of plants, walls or insulation boards.

8. A method of using a two-component flame retardant according to any one of claims 1 to 4, characterized in that, The method of use includes the following steps: The components A and B are mixed to obtain a mixture, which is then diluted with water to obtain a diluted solution of the two-component flame retardant. A diluted solution of the two-component flame retardant is sprayed onto the surface of the base material using a sprayer to form a flame retardant layer; The mass ratio of component A to component B is (3~5):

1.

9. The method of using the two-component flame retardant according to claim 8, characterized in that, The mass ratio of component A to component B is 4:

1.

10. The method of using the two-component flame retardant according to claim 8, characterized in that, The mass ratio of the mixture to water is 10:(3~4).

11. The method of using the two-component flame retardant according to claim 10, characterized in that, The mass ratio of the mixture to water is 10:3.

5.

12. The method of using the two-component flame retardant according to claim 8, characterized in that, The substrate material includes any one of plants, walls, or insulation boards.

13. The method of using the two-component flame retardant according to claim 8, characterized in that, The diluted solution of the two-component flame retardant is sprayed at a rate of 0.02~0.04 mL / cm². 2 .

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