Formula and production process of fire extinguishing agent

Abstract

The invention relates to the technical field of fire extinguishing material preparation, in particular to a formula of a fire extinguishing agent and a production process of the fire extinguishing agent. The fire extinguishing agent prepared by compounding an inorganic composition A and an organic composition B can extinguish open fire, meanwhile, can absorb heat in a fire scene, greatly reduces the environment temperature and meanwhile releases flame-retardant gas; a large number of active ions are generated to capture free radicals generated in the combustion process, the chain reaction of combustion is blocked, and the fire extinguishing effect is excellent; in addition, the fire extinguishing agent provided by the invention is simple in preparation method, good in stability, convenient to transport and store, non-toxic, pollution-free, free of harmful residues after fire extinguishing, environment-friendly and safe.

Description

Technical Field

[0001] The invention relates to the technical field of fire extinguishing material preparation, and in particular to a formula of a fire extinguishing agent and a production process thereof. Background Art

[0002] Fire is one of the most threatening disasters to people's lives and property losses. Fire control needs to be curbed from the source, and the safety and flame retardancy of buildings and devices should be strengthened to reduce or avoid the occurrence of fires. On the other hand, it is necessary to extinguish the fire source in time when the fire just starts, and eliminate the fire in the cradle stage; secondly, there should be a good way to control and extinguish the fire when the fire spreads. Therefore, an efficient, safe and easy-to-operate fire extinguishing agent is urgently needed.

[0003] Commonly used fire extinguishing agents at home and abroad include water-based fire extinguishing agents, foam fire extinguishing agents, dry powder fire extinguishing agents and gas fire extinguishing agents. Agents, etc. Water-based fire extinguishing agents are the most widely used fire extinguishing agents, which are mainly used to extinguish Class A and Class B fires. Foam fire extinguishing agents are fire extinguishing agents that produce foam when water and chemical substances are mixed in proportion and contacted with air to achieve the purpose of fire extinguishing. Dry powder fire extinguishing agents are fine dry solid powders, stored in fire extinguishers, and sprayed out with the help of the pressure of fire extinguishers. They are mainly used to extinguish Class A, B, C, and D fires. Carbon dioxide gas fire extinguishing agents use liquefied carbon dioxide to contact with flames to absorb a large amount of heat, suffocating and cooling the flames to achieve the purpose of fire extinguishing. It can be used to extinguish Class A, B, and C fires, and is suitable for extinguishing fires that are easily contaminated by water foam. Although dry powder fire extinguishing agents are low in cost and simple in production process, the serious dust pollution during the fire extinguishing process has certain damage to the human body and some materials. Like gas fire extinguishing agents, they have no cooling and anti-reignition effects, and the amount used for fire extinguishing is relatively large.

[0004] As the requirements for fire extinguishing are constantly increasing, the existing fire extinguishing agents are gradually unable to meet the current actual needs. Countries around the world are stepping up research on new fire extinguishing agents and new fire extinguishing methods with high efficiency, wide application range, perfect performance, non-toxicity, environmental protection and low cost. Therefore, it is of great significance to develop a fire extinguishing agent that is easy to store, simple to use, safe and has high fire extinguishing efficiency.

[0005] Purpose of the Invention In order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide a formula of a fire extinguishing agent and a production process thereof. The fire extinguishing agent prepared by compounding an inorganic composition A with an organic composition B can not only extinguish open flames, but also absorb heat in the fire scene, significantly reduce the ambient temperature, and simultaneously release flame-retardant gases, generate a large number of active ions to capture free radicals generated during the combustion process, block the chain reaction of combustion, and have an excellent fire extinguishing effect; in addition, the fire extinguishing agent provided by the present invention has a simple preparation method, good stability, is easy to transport and store, is non-toxic and pollution-free, has no harmful residues after fire extinguishing, and is environmentally friendly and safe.

[0006] To achieve the above object, the present invention provides the following technical solutions: A fire extinguishing agent formula, comprising an inorganic composition A and an organic composition B; Wherein, the inorganic composition A comprises, by mass, 80-100 parts of ultrafine sodium chloride, 10-20 parts of ultrafine sodium bicarbonate, 10-15 parts of potassium bicarbonate, and 5-10 parts of zinc borate; The organic composition B comprises, by mass, 30-40 parts of N,N-dibenzylhydroxylamine, 20-30 parts of perfluorohexanone, 5-10 parts of 2,6-di-tert-butyl-4-methylphenol, 3-5 parts of modified polysiloxane, 1-3 parts of modified polytetrafluoroethylene powder, 5-7 parts of methyl cellulose, and 1-2 parts of dodecyl dimethyl betaine.

[0007] Preferably, the modified polysiloxane is prepared by the following steps: S11. Mix 10-15 parts of polysiloxane and 40-50 parts of toluene by mass and stir for 3-5 minutes to mix well; S12. Add 2-5 parts of 4-allyl-2-methoxyphenol to the solution obtained in step S11 in parts by mass and stir to mix evenly; S13. Add 0.01-0.1 parts of Custer catalyst by mass to the solution obtained in step S12 and stir evenly, heat in a water bath to 60-80°C and maintain for 12-24 hours to promote the completion of the hydrosilylation reaction. After the reaction is completed, cool the reaction mixture to room temperature, separate and purify to obtain the modified polysiloxane.

[0008] Preferably, the polysiloxane is one or more of polymethyl hydrogen siloxane and polyethyl hydrogen siloxane.

[0009] Preferably, in step S13, infrared spectroscopy can be used to detect the 2100-2200cm -1 The completion of the hydrosilylation reaction was monitored by measuring the absorption peak of the Si-H bond.

[0010] Preferably, the modified polytetrafluoroethylene powder is prepared by the following steps: S21. 5-10 parts by mass of polytetrafluoroethylene powder are placed in a Soxhlet extractor and extracted with 100-200 parts of toluene under reflux for 15-24h to remove surface impurities and oligomer molecules; S22. The polytetrafluoroethylene powder treated in step S21 is placed at 80-100°C for drying for 3-5h to obtain pretreated polytetrafluoroethylene powder; S23. 5-10 parts by mass of pretreated polytetrafluoroethylene powder and 200-300 parts of toluene are mixed and stirred for 3-5min to mix evenly; S24. Add benzoyl peroxide to the solution treated in step S23 and slowly raise the temperature to 70-80° C. for 6-12 hours; S25. Add 0.5-2 parts of allylamine containing amino group dropwise to the solution treated in step S24, continue stirring and reacting at 70-80°C for 6-12h, so that the allylamine containing amino group and the polytetrafluoroethylene powder undergo grafting reaction. After the reaction is completed, cool the reaction solution to room temperature, centrifuge, wash, and dry to obtain the modified polytetrafluoroethylene powder.

[0011] Preferably, in step S21, the temperature range of the reflux extraction is 110-120°C.

[0012] Preferably, in step S25, the amino-containing allylamine is one or more of N,N-dimethylallylamine, N-methylallylamine, and N-allyl-1,3-propylenediamine.

[0013] Preferably, the particle size of the ultrafine sodium chloride is 0.1-10 μm; the particle size of the ultrafine sodium bicarbonate is 0.5-15 μm; and the viscosity of the methyl cellulose is 500-1500 mPa·s.

[0014] A production process of a fire extinguishing agent is used to prepare a fire extinguishing agent provided by the formula of the fire extinguishing agent.

[0015] Preferably, the method comprises the following steps: S1. Add ultrafine sodium chloride, ultrafine sodium bicarbonate and potassium bicarbonate in parts by mass to a high-speed stirrer and stir at a speed of 1000-1500r / min for 30-60min to mix evenly; S2. Add zinc borate to the mixture obtained in step S1 in parts by mass, continue stirring for 20-30 min to ensure uniform mixing, and pass the mixture through a 200-mesh sieve to remove larger particles to ensure uniformity and fineness to obtain an inorganic composition A; S3. Add 300-400 parts of acetone in the reactor by mass, and slowly add modified polysiloxane, modified polytetrafluoroethylene powder, methyl cellulose at a speed of 300-500r / min, and stir magnetically for 30-40min to mix evenly; S4. Add N,N-dibenzylhydroxylamine, perfluorohexanone, 2,6-di-tert-butyl-4-methylphenol and dodecyl dimethyl betaine to the solution obtained in step S3 in parts by mass, continue stirring for 30-40 min to fully mix, and remove acetone by distillation under reduced pressure to obtain an organic composition B; S5. The inorganic composition A and the organic composition B are uniformly mixed in a mass ratio of 4-6:15-20 to obtain the fire extinguishing agent.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The inorganic composition A of the present invention is prepared by compounding ultrafine sodium chloride, ultrafine sodium bicarbonate, potassium bicarbonate and zinc borate. Under the action of high temperature of flame, ultrafine sodium chloride will rapidly decompose and release chloride ions. Chloride ions can capture free radicals generated in the combustion process and interrupt the chain reaction of combustion. At the same time, ultrafine sodium chloride particles have a large specific surface area and can fully contact with the combustion object, playing a role of covering and isolating oxygen; ultrafine sodium bicarbonate and potassium bicarbonate decompose under heat to produce carbon dioxide and water. Carbon dioxide can dilute the oxygen concentration in the combustion area, so that the combustion stops due to lack of oxygen, and the produced water can absorb heat and reduce the temperature of the combustion object; at high temperature, zinc borate will release crystal water, absorb a large amount of heat, and reduce the temperature of the combustion object. At the same time, zinc borate will form a glass-like protective film on the surface of the combustion object to prevent oxygen from contacting the combustion object, playing a role of isolation and flame retardancy. Different components cooperate with each other to improve the overall fire extinguishing performance of the inorganic composition; 2. The N,N-dibenzylhydroxylamine, perfluorohexanone and 2,6-di-tert-butyl-4-methylphenol in the organic composition B of the present invention can more comprehensively capture free radicals in the combustion reaction through synergistic action, thereby enhancing the fire extinguishing effect; the methylcellulose mainly plays a role of thickening and stabilization, and can adjust the rheological properties of the fire extinguishing agent, so that it can better adhere to the surface of the burning object during the spraying process, prolong the residence time of the fire extinguishing agent on the surface of the burning object, and improve the fire extinguishing effect; 3. The present invention introduces methoxyl groups and phenolic hydroxyl groups into the polysiloxane chain by modifying the polysiloxane through a hydrosilylation reaction. The phenolic hydroxyl group has antioxidant properties and can help capture active oxygen species generated during the combustion process in the fire extinguishing agent to prevent the propagation of the chain reaction, while the introduction of the methoxyl group helps to form a more stable dispersion system and improve the dispersibility and stability of the fire extinguishing component. 4. The present invention successfully achieves modification of polytetrafluoroethylene micropowder by grafting amino functional groups on the surface of polytetrafluoroethylene micropowder. The modified polytetrafluoroethylene can make the components in the inorganic composition adhere to its surface through ionic action, hydrogen bonding, electrostatic interaction, etc., thereby improving the binding force between the inorganic component and the organic component. When the fire extinguishing agent acts, the fire extinguishing efficiency and anti-reignition ability of the fire extinguishing agent are improved; 5. The fire extinguishing agent provided by the present invention has a simple preparation method, good stability, is easy to transport and store, is non-toxic and pollution-free, has no harmful residue after fire extinguishing, and is environmentally friendly and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The following is a production process flow chart of the fire extinguishing agent of the present invention; Figure 2 This is a process flow chart for preparing the modified polysiloxane of the present invention; Figure 3 The present invention is a flow chart of the preparation process of the modified polytetrafluoroethylene powder. DETAILED DESCRIPTION

[0018] The present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a 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 creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-3 , the present invention provides a technical solution: Example 1 A production process of fire extinguishing agent: S1. Add ultrafine sodium chloride, ultrafine sodium bicarbonate and potassium bicarbonate in parts by mass to a high-speed stirrer and stir at a speed of 1500r / min for 30min to mix evenly; S2. Add zinc borate to the mixture obtained in step S1 in parts by mass, continue stirring for 20 min to ensure uniform mixing, and pass the mixture through a 200-mesh sieve to remove larger particles to ensure uniformity and fineness to obtain an inorganic composition A; S3. 300 parts by mass of acetone were added to the reactor, and at a speed of 300r / min, modified polysiloxane, modified polytetrafluoroethylene powder, methyl cellulose were slowly added, and magnetic stirring was performed for 30min to mix them evenly; S4. Add N,N-dibenzylhydroxylamine, perfluorohexanone, 2,6-di-tert-butyl-4-methylphenol and dodecyl dimethyl betaine to the solution obtained in step S3 in parts by mass, continue stirring for 30 min to fully mix, and then remove acetone by distillation under reduced pressure to obtain an organic composition B; S5. The inorganic composition A and the organic composition B are uniformly mixed in a mass ratio of 4:15 to obtain the fire extinguishing agent; In the above production process, the amount of each component in each step is as follows (the unit of one mass part is specified as 100g): The particle size of the ultrafine sodium chloride is 10 μm; the particle size of the ultrafine sodium bicarbonate is 15 μm; the viscosity of the methyl cellulose is 1000 mPa·s; The modified polysiloxane is prepared by the following steps (one part by mass is defined as 100 g): S11. Mix 11 parts of polysiloxane and 45 parts of toluene by mass and stir for 3 minutes to mix well; S12. Add 2 parts of 4-allyl-2-methoxyphenol to the solution obtained in step S11 in parts by mass and stir to mix evenly; S13. Add 0.05 parts of Custer catalyst to the solution obtained in step S12 by mass and stir evenly, heat in a water bath to 60° C. and maintain for 12 hours to promote the completion of the hydrosilylation reaction. After the reaction is completed, the reaction mixture is cooled to room temperature, separated and purified to obtain the modified polysiloxane; The polysiloxane is polymethyl hydrogen polysiloxane; The modified polytetrafluoroethylene powder is prepared by the following steps (the unit of one mass part is 100g): S21. 5 parts by mass of polytetrafluoroethylene powder were placed in a Soxhlet extractor and refluxed with 100 parts of toluene at 110°C for 15h to remove surface impurities and oligomer molecules; S22. The polytetrafluoroethylene powder treated in step S21 is placed at 80° C. for drying for 3 hours to obtain pretreated polytetrafluoroethylene powder; S23. Mix 5 parts of pretreated polytetrafluoroethylene powder with 200 parts of toluene by mass and stir for 3 min to mix well; S24. Add benzoyl peroxide to the solution treated in step S23 and slowly raise the temperature to 70° C. for 6 h; S25. Add 0.5 parts of N,N-dimethylallylamine dropwise to the solution treated in step S24, and continue stirring the reaction at 70°C for 6 hours to allow the amino-containing allylamine to undergo a grafting reaction with the polytetrafluoroethylene powder. After the reaction is completed, the reaction solution is cooled to room temperature, centrifuged, washed, and dried to obtain the modified polytetrafluoroethylene powder; The dosage of the benzoyl peroxide is 1% of the volume of the solution.

[0020] Example 2 A production process of fire extinguishing agent: S1. Add ultrafine sodium chloride, ultrafine sodium bicarbonate and potassium bicarbonate in parts by mass to a high-speed stirrer and stir at a speed of 1000r / min for 50min to mix evenly; S2. Add zinc borate to the mixture obtained in step S1 in parts by mass, continue stirring for 20 min to ensure uniform mixing, and pass the mixture through a 200-mesh sieve to remove larger particles to ensure uniformity and fineness to obtain an inorganic composition A; S3. 300 parts by mass of acetone were added to the reactor, and at a speed of 400r / min, modified polysiloxane, modified polytetrafluoroethylene powder, methyl cellulose were slowly added, and magnetic stirring was performed for 30min to mix them evenly; S4. Add N,N-dibenzylhydroxylamine, perfluorohexanone, 2,6-di-tert-butyl-4-methylphenol and dodecyl dimethyl betaine to the solution obtained in step S3 in parts by mass, continue stirring for 35 min to fully mix, and then remove acetone by distillation under reduced pressure to obtain an organic composition B; S5. The inorganic composition A and the organic composition B are uniformly mixed in a mass ratio of 4:20 to obtain the fire extinguishing agent; In the above production process, the amount of each component in each step is as follows (the unit of one mass part is specified as 100g): The particle size of the ultrafine sodium chloride is 10 μm; the particle size of the ultrafine sodium bicarbonate is 15 μm; the viscosity of the methyl cellulose is 1000 mPa·s; The modified polysiloxane is prepared by the following steps (one part by mass is defined as 100 g): S11. Mix 13 parts of polysiloxane and 45 parts of toluene by mass and stir for 3 minutes to mix well; S12. Add 2 parts of 4-allyl-2-methoxyphenol to the solution obtained in step S11 in parts by mass and stir to mix evenly; S13. Add 0.05 parts of Custer catalyst to the solution obtained in step S12 by mass and stir evenly, heat in a water bath to 60° C. and maintain for 18 hours to promote the completion of the hydrosilylation reaction. After the reaction is completed, the reaction mixture is cooled to room temperature, separated and purified to obtain the modified polysiloxane; The polysiloxane is polymethyl hydrogen polysiloxane; The modified polytetrafluoroethylene powder is prepared by the following steps (the unit of one mass part is 100g): S21. 10 parts by mass of polytetrafluoroethylene powder were placed in a Soxhlet extractor and refluxed with 200 parts of toluene at 110°C for 15h to remove surface impurities and oligomer molecules; S22. The polytetrafluoroethylene powder treated in step S21 is placed at 80° C. for drying for 3 hours to obtain pretreated polytetrafluoroethylene powder; S23. 10 parts by mass of pretreated polytetrafluoroethylene powder and 300 parts of toluene were mixed and stirred for 3 min to mix evenly; S24. Add benzoyl peroxide to the solution treated in step S23 and slowly raise the temperature to 70° C. for 6 h; S25. Add 0.5 parts of N-methylallylamine dropwise to the solution treated in step S24, and continue to stir and react at 70°C for 6 hours to allow the amino-containing allylamine to undergo a grafting reaction with the polytetrafluoroethylene powder. After the reaction is completed, the reaction solution is cooled to room temperature, centrifuged, washed, and dried to obtain the modified polytetrafluoroethylene powder; The dosage of the benzoyl peroxide is 1% of the volume of the solution.

[0021] Example 3 A production process of fire extinguishing agent: S1. Add ultrafine sodium chloride, ultrafine sodium bicarbonate and potassium bicarbonate in parts by mass to a high-speed stirrer and stir at a speed of 1000r / min for 50min to mix evenly; S2. Add zinc borate to the mixture obtained in step S1 in parts by mass, continue stirring for 20 min to ensure uniform mixing, and pass the mixture through a 200-mesh sieve to remove larger particles to ensure uniformity and fineness to obtain an inorganic composition A; S3. 300 parts by mass of acetone were added to the reactor, and at a speed of 400r / min, modified polysiloxane, modified polytetrafluoroethylene powder, methyl cellulose were slowly added, and magnetic stirring was performed for 30min to mix them evenly; S4. Add N,N-dibenzylhydroxylamine, perfluorohexanone, 2,6-di-tert-butyl-4-methylphenol and dodecyl dimethyl betaine to the solution obtained in step S3 in parts by mass, continue stirring for 35 min to fully mix, and then remove acetone by distillation under reduced pressure to obtain an organic composition B; S5. The inorganic composition A and the organic composition B are uniformly mixed in a mass ratio of 5:15 to obtain the fire extinguishing agent; In the above production process, the amount of each component in each step is as follows (the unit of one mass part is specified as 100g): The particle size of the ultrafine sodium chloride is 10 μm; the particle size of the ultrafine sodium bicarbonate is 15 μm; the viscosity of the methyl cellulose is 1000 mPa·s; The modified polysiloxane is prepared by the following steps (one part by mass is defined as 100 g): S11. Mix 15 parts of polysiloxane and 50 parts of toluene by mass and stir for 3 minutes to mix well; S12. Add 5 parts of 4-allyl-2-methoxyphenol to the solution obtained in step S11 in parts by mass and stir to mix evenly; S13. Add 0.1 parts of Custer catalyst to the solution obtained in step S12 by mass and stir evenly, heat in a water bath to 80° C. and maintain for 18 hours to promote the completion of the hydrosilylation reaction. After the reaction is completed, the reaction mixture is cooled to room temperature, separated and purified to obtain the modified polysiloxane; The polysiloxane is polyethyl hydrogen polysiloxane; The modified polytetrafluoroethylene powder is prepared by the following steps (the unit of one mass part is 100g): S21. 10 parts by mass of polytetrafluoroethylene powder were placed in a Soxhlet extractor and refluxed with 200 parts of toluene at 110°C for 15h to remove surface impurities and oligomer molecules; S22. The polytetrafluoroethylene powder treated in step S21 is placed at 80° C. for drying for 3 hours to obtain pretreated polytetrafluoroethylene powder; S23. 10 parts by mass of pretreated polytetrafluoroethylene powder and 300 parts of toluene were mixed and stirred for 3 min to mix evenly; S24. Add benzoyl peroxide to the solution treated in step S23 and slowly raise the temperature to 70° C. for 6 h; S25. Add 1 part of N,N-dimethylallylamine dropwise to the solution treated in step S24, and continue stirring the reaction at 70° C. for 6 hours to allow the amino-containing allylamine to undergo a grafting reaction with the polytetrafluoroethylene powder. After the reaction is completed, the reaction solution is cooled to room temperature, centrifuged, washed, and dried to obtain the modified polytetrafluoroethylene powder; The dosage of the benzoyl peroxide is 1% of the volume of the solution.

[0022] Example 4 A production process of fire extinguishing agent: S1. Add ultrafine sodium chloride, ultrafine sodium bicarbonate and potassium bicarbonate in parts by mass to a high-speed stirrer and stir at a speed of 1000r / min for 50min to mix evenly; S2. Add zinc borate to the mixture obtained in step S1 in parts by mass, continue stirring for 20 min to ensure uniform mixing, and pass the mixture through a 200-mesh sieve to remove larger particles to ensure uniformity and fineness to obtain an inorganic composition A; S3. 300 parts by mass of acetone were added to the reactor, and at a speed of 400r / min, modified polysiloxane, modified polytetrafluoroethylene powder, methyl cellulose were slowly added, and magnetic stirring was performed for 30min to mix them evenly; S4. Add N,N-dibenzylhydroxylamine, perfluorohexanone, 2,6-di-tert-butyl-4-methylphenol and dodecyl dimethyl betaine to the solution obtained in step S3 in parts by mass, continue stirring for 35 min to fully mix, and then remove acetone by distillation under reduced pressure to obtain an organic composition B; S5. The inorganic composition A and the organic composition B are uniformly mixed in a mass ratio of 5:20 to obtain the fire extinguishing agent; In the above production process, the amount of each component in each step is as follows (the unit of one mass part is specified as 100g): The particle size of the ultrafine sodium chloride is 10 μm; the particle size of the ultrafine sodium bicarbonate is 15 μm; the viscosity of the methyl cellulose is 1000 mPa·s; The modified polysiloxane is prepared by the following steps (one part by mass is defined as 100 g): S11. Mix 12 parts of polysiloxane and 45 parts of toluene by mass and stir for 3 minutes to mix well; S12. Add 5 parts of 4-allyl-2-methoxyphenol to the solution obtained in step S11 in parts by mass and stir to mix evenly; S13. Add 0.05 parts of Custer catalyst to the solution obtained in step S12 by mass and stir evenly, heat in a water bath to 80° C. and maintain for 18 hours to promote the completion of the hydrosilylation reaction. After the reaction is completed, the reaction mixture is cooled to room temperature, separated and purified to obtain the modified polysiloxane; The polysiloxane is polyethyl hydrogen polysiloxane; The modified polytetrafluoroethylene powder is prepared by the following steps (the unit of one mass part is 100g): S21. 10 parts by mass of polytetrafluoroethylene powder were placed in a Soxhlet extractor and refluxed with 200 parts of toluene at 110°C for 15h to remove surface impurities and oligomer molecules; S22. The polytetrafluoroethylene powder treated in step S21 is placed at 80° C. for drying for 3 hours to obtain pretreated polytetrafluoroethylene powder; S23. 10 parts by mass of pretreated polytetrafluoroethylene powder and 300 parts of toluene were mixed and stirred for 3 min to mix evenly; S24. Add benzoyl peroxide to the solution treated in step S23 and slowly raise the temperature to 70° C. for 6 h; S25. Add 1 part of N-allyl-1,3-propylenediamine dropwise to the solution treated in step S24, and continue stirring the reaction at 70° C. for 6 hours to allow the amino-containing allylamine to undergo a grafting reaction with the polytetrafluoroethylene powder. After the reaction is completed, the reaction solution is cooled to room temperature, centrifuged, washed, and dried to obtain the modified polytetrafluoroethylene powder; The dosage of the benzoyl peroxide is 1% of the volume of the solution.

[0023] Comparative Example 1: Comparative Example 1 is different from Example 1 in that the inorganic composition A originally present in Example 1 is omitted in Comparative Example 1, and only the organic composition B is prepared in Comparative Example 1 and used for the preparation of the fire extinguishing agent, and the remaining steps are exactly the same in Example 1 and Comparative Example 1.

[0024] Comparative Example 2: Comparative Example 2 is different from Example 1 in that the organic composition B originally present in Example 1 is omitted in Comparative Example 2, and only the inorganic composition A is prepared in Comparative Example 2 and used for the preparation of the fire extinguishing agent. The remaining steps are exactly the same in Comparative Example 2 and Example 1.

[0025] Comparative Example 3: Comparative Example 3 is different from Example 1 in that steps S11-S13 originally existing in Example 1 are omitted in Comparative Example 3, so that the polysiloxane is not modified in Comparative Example 3, and the remaining steps are exactly the same in Comparative Example 3 and Example 1.

[0026] Comparative Example 4: Comparative Example 4 is different from Example 1 in that steps S21-S25 originally existing in Example 1 are omitted in Comparative Example 4, so that the polytetrafluoroethylene powder is not modified in Comparative Example 4, and the remaining steps are exactly the same in Comparative Example 4 and Example 1.

[0027] Performance Test: The fire extinguishing performance of the fire extinguishing agents prepared in Examples 1-4 and Comparative Examples 1-4 was tested, and the test results are as follows: Referring to the test data in the table, it can be seen that the average fire extinguishing time of the fire extinguishing agent products prepared in Examples 1-4 is less than 15 minutes, and no re-ignition occurs, which proves that the fire extinguishing performance of the fire extinguishing agent prepared by the present invention is excellent and stable; at the same time, the difference in fire extinguishing performance shown in Example 1 and Comparative Examples 1-2 proves that the present invention can achieve the absorption of heat in the fire scene and greatly reduce the ambient temperature while extinguishing the open flame through the compound use of the inorganic composition and the organic composition through the synergistic effect of the two, and at the same time release the flame-retardant gas, generate a large number of active ions to capture the free radicals generated in the combustion process, block the chain reaction of combustion, and finally improve the overall fire extinguishing performance of the fire extinguishing agent; the difference in fire extinguishing performance shown in Example 1 and Comparative Examples 3-4 reflects that the present invention can absorb the heat in the fire scene and greatly reduce the ambient temperature through the synergistic effect of the inorganic composition and the organic composition through the compound use of the inorganic composition and the organic composition. The modification of micropowders has successfully achieved the improvement of the fire extinguishing performance of the fire extinguishing agent, that is, by modifying polysiloxane, methoxy and phenolic hydroxyl groups are introduced into the polysiloxane chain through a silylation reaction. The phenolic hydroxyl group has antioxidant properties and helps capture the active oxygen species produced during the combustion process in the fire extinguishing agent to prevent the propagation of the chain reaction. The introduction of methoxy groups promotes the formation of a more stable dispersion system, thereby improving the dispersion and stability of the fire extinguishing component. The modification of polytetrafluoroethylene micropowders is achieved by grafting amino functional groups on the surface of polytetrafluoroethylene micropowders. The modified polytetrafluoroethylene allows the components in the inorganic composition to adhere to its surface through ionic action, hydrogen bonding, electrostatic interaction, etc., thereby improving the binding force between the inorganic components and the organic components. When the fire extinguishing agent acts, the fire extinguishing efficiency and anti-reignition ability of the fire extinguishing agent are improved.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fire extinguishing agent formulation, characterized in that: Respectively comprising an inorganic composition A and an organic composition B; Wherein, the inorganic composition A comprises, by mass, 80-100 parts of ultrafine sodium chloride, 10-20 parts of ultrafine sodium bicarbonate, 10-15 parts of potassium bicarbonate, and 5-10 parts of zinc borate; The organic composition B comprises, by mass, 30-40 parts of N,N-dibenzylhydroxylamine, 20-30 parts of perfluorohexanone, 5-10 parts of 2,6-di-tert-butyl-4-methylphenol, 3-5 parts of modified polysiloxane, 1-3 parts of modified polytetrafluoroethylene powder, 5-7 parts of methyl cellulose, and 1-2 parts of dodecyl dimethyl betaine.

2. The fire extinguishing agent formulation according to claim 1, characterized in that: The modified polysiloxane is prepared by the following steps: S11. Mix 10-15 parts of polysiloxane and 40-50 parts of toluene by mass and stir for 3-5 minutes to mix well; S12. Add 2-5 parts of 4-allyl-2-methoxyphenol to the solution obtained in step S11 in parts by mass and stir to mix evenly; S13. Add 0.01-0.1 parts of Custer catalyst by mass to the solution obtained in step S12 and stir evenly, heat in a water bath to 60-80°C and maintain for 12-24 hours to promote the completion of the hydrosilylation reaction. After the reaction is completed, cool the reaction mixture to room temperature, separate and purify to obtain the modified polysiloxane.

3. The fire extinguishing agent formulation according to claim 2, characterized in that: The polysiloxane is one or more of polymethyl hydrogen siloxane and polyethyl hydrogen siloxane.

4. The fire extinguishing agent formulation according to claim 2, characterized in that: In step S13, infrared spectroscopy can be used to detect the 2100-2200cm -1 The completion of the hydrosilylation reaction was monitored by measuring the absorption peak of the Si-H bond.

5. The fire extinguishing agent formulation according to claim 1, characterized in that: The modified polytetrafluoroethylene powder is prepared by the following steps: S21. 5-10 parts by mass of polytetrafluoroethylene powder are placed in a Soxhlet extractor and extracted with 100-200 parts of toluene under reflux for 15-24h to remove surface impurities and oligomer molecules; S22. The polytetrafluoroethylene powder treated in step S21 is placed at 80-100°C for drying for 3-5h to obtain pretreated polytetrafluoroethylene powder; S23. 5-10 parts by mass of pretreated polytetrafluoroethylene powder and 200-300 parts of toluene are mixed and stirred for 3-5min to mix evenly; S24. Add benzoyl peroxide to the solution treated in step S23 and slowly raise the temperature to 70-80° C. for 6-12 hours; S25. Add 0.5-2 parts of allylamine containing amino group dropwise to the solution treated in step S24, continue stirring and reacting at 70-80°C for 6-12h, so that the allylamine containing amino group and the polytetrafluoroethylene powder undergo grafting reaction. After the reaction is completed, cool the reaction solution to room temperature, centrifuge, wash, and dry to obtain the modified polytetrafluoroethylene powder.

6. The fire extinguishing agent formulation according to claim 5, characterized in that: In step S21, the temperature range of the reflux extraction is 110-120°C.

7. The fire extinguishing agent formulation according to claim 5, characterized in that: In step S25, the amino group-containing allylamine is one or more of N,N-dimethylallylamine, N-methylallylamine, and N-allyl-1,3-propylenediamine.

8. The fire extinguishing agent formulation according to claim 1, characterized in that: The particle size of the ultrafine sodium chloride is 0.1-10 μm; the particle size of the ultrafine sodium bicarbonate is 0.5-15 μm; and the viscosity of the methyl cellulose is 500-1500 mPa·s.

9. A production process for a fire extinguishing agent, used for preparing a fire extinguishing agent provided by the fire extinguishing agent formula according to any one of claims 1 to 8.

10. The production process of fire extinguishing agent according to claim 9, characterized in that: The following steps are involved: S1. Add ultrafine sodium chloride, ultrafine sodium bicarbonate and potassium bicarbonate in parts by mass to a high-speed stirrer and stir at a speed of 1000-1500r / min for 30-60min to mix evenly; S2. Add zinc borate to the mixture obtained in step S1 in parts by mass, continue stirring for 20-30 min to ensure uniform mixing, and pass the mixture through a 200-mesh sieve to remove larger particles to ensure uniformity and fineness to obtain an inorganic composition A; S3. Add 300-400 parts of acetone in the reactor by mass, and slowly add modified polysiloxane, modified polytetrafluoroethylene powder, methyl cellulose at a speed of 300-500r / min, and stir magnetically for 30-40min to mix evenly; S4. Add N,N-dibenzylhydroxylamine, perfluorohexanone, 2,6-di-tert-butyl-4-methylphenol and dodecyl dimethyl betaine to the solution obtained in step S3 in parts by mass, continue stirring for 30-40 min to fully mix, and remove acetone by distillation under reduced pressure to obtain an organic composition B; S5. The inorganic composition A and the organic composition B are uniformly mixed in a mass ratio of 4-6:15-20 to obtain the fire extinguishing agent.

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