Efficient environment-friendly silicon-based foam extinguishing agent synergistically compounded with multi-element silicon surfactants and preparation method of efficient environment-friendly silicon-based foam extinguishing agent

Abstract

The invention provides an efficient environment-friendly silicon-based foam extinguishing agent synergistically compounded by a multi-silicon surfactant and a preparation method of the efficient environment-friendly silicon-based foam extinguishing agent. The cleaning agent is prepared from raw materials in percentage by mass as follows: 5%-35% of an ionic silicon surfactant, 5%-35% of a nonionic silicon surfactant, 0.1%-3% of a polysaccharide foam stabilizer, 1%-10% of a cosolvent, 0.1%-10% of a preservative, 1%-10% of an antifreeze agent, 0.1%-5% of a regulator and the balance of deionized water. According to the invention, the ionic silicon surfactant and the nonionic silicon surfactant are compounded for use, hydrophobic and oleophobic tetrasiloxane groups and trisiloxane groups are used as spreading agents of an oil-water interface, and the formula of the foam extinguishing agent only contains the silicon surfactant; the liquid fuel fire extinguishing agent does not contain a forbidden fluorocarbon surfactant and a hydrocarbon surfactant with an oleophylic end, so that the environmental hazard of the fluorocarbon surfactant is completely eradicated, the oleophylic property of the foam fire extinguishing agent is eliminated, and the liquid fuel fire can be extinguished. The invention has positive significance on environment protection, human health protection and sustainable development of foam fire extinguishing technology.

Description

Technical Field

[0001] The present invention belongs to the technical field of fire extinguishing agents, and specifically relates to a highly efficient and environmentally friendly silicon-based foam fire extinguishing agent synergistically compounded with multiple silicon surfactants and a preparation method thereof. Background Art

[0002] The core components of film-forming foam fire extinguishing agents, long-chain fluorocarbon surfactants (perfluorooctanoic acid PFOA and perfluorooctane sulfonyl compounds PFOS), cannot be degraded in nature. They accumulate in soil, water sources and food chains, and eventually have irreversible negative impacts on the environment and human body. Currently, PFOA and PFOS have been completely banned by the Stockholm Convention signed by the United Nations and have been included in the list of persistent organic pollutants (POPs).

[0003] Traditional foam fire extinguishing agents are foamed by hydrocarbon surfactants, but hydrocarbon surfactants still have a certain lipophilicity, which is not conducive to foam spreading; the core effect of fluorocarbon surfactants is that their perfluorocarbon chains have hydrophobic and oleophobic properties, which can form a layer of water film on the surface of the fuel to spread the foam fire extinguishing agent in the form of a film. CN 113926131 A discloses a fluorine-free environmentally friendly foam fire extinguishing agent and a preparation method thereof, which adopts a natural surfactant saponin and a hydrocarbon surfactant to form a foam fire extinguishing agent. Although it does not contain a fluorocarbon surfactant, its foam stability is poor and the fire extinguishing time is long. CN 114504758A discloses a fluorine-free foam fire extinguishing agent and a preparation method thereof, which adopts an organosilicon surfactant to reduce the surface tension of water, and is compounded with a hydrocarbon surfactant, and water glass is also added, but there are also problems of poor foam stability and long fire extinguishing time. Therefore, it is urgent to develop an efficient and environmentally friendly fluorine-free foam fire extinguishing agent to meet fire protection needs and eliminate environmental hazards. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a high-efficiency and environmentally friendly silicon-based foam fire extinguishing agent and a preparation method thereof in view of the deficiencies of the above-mentioned prior art, including a plurality of silicon-based surfactants and additives that meet the multiple functions of the foam fire extinguishing agent, the silicon-based surfactant is a siloxane group, and the unique umbrella-like structure of the silicon-oxygen bond has a strong oleophobic and hydrophobic property, which can effectively reduce the surface tension of water and the interfacial tension of fuel-water so that it can form a film and spread on the interface; the additives include antifreeze, cosolvent, foam stabilizer, regulator and preservative, which can ensure the excellent performance of the foam fire extinguishing agent in actual transportation, storage and use. The present invention uses a variety of silicon surfactants to achieve compound synergy, forming a surfactant system with high foaming, good foam stability, low surface tension and interfacial tension, completely eliminating the environmental hazards of fluorocarbon surfactants and eliminating the lipophilic properties of foam fire extinguishing agents, which has positive significance for protecting the environment, protecting human health and the sustainable development of foam fire extinguishing technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] The invention discloses a highly efficient and environmentally friendly silicon-based foam fire extinguishing agent synergistically compounded with multiple silicon surfactants, which is composed of the following raw materials in percentage by mass: 5% to 35% of ionic silicon surfactant, 5% to 35% of non-ionic silicon surfactant, 0.1% to 3% of polysaccharide foam stabilizer, 1% to 10% of cosolvent, 0.1% to 10% of preservative, 1% to 10% of antifreeze agent, 0.1% to 5% of regulator, and the balance is deionized water.

[0007] Preferably, the ionic silicon surfactant is a siloxane surfactant whose hydrophobic group is tris(trimethylsiloxy)silyl, and has the structural formula:

[0008] Where R1 is C n H 2n or C n H 2n-2 or a combination of two carbon chains, the total length of the carbon chain is 1 to 6, and R2 is an ionic hydrophilic group, including one or more of quaternary ammonium salts, carboxylates, sulfates or sulfonates.

[0009] Preferably, the nonionic silicon surfactant is Silwt TM HS-604、Silwt TM 408、Silwt TM 618、CoatOSil TM -77, CoatOSil TM -3505, CoatOSil TM -1770、UF-1328、UF-5880、UF-6680、VORASURF TM DC 5900, DOWSIL TM 502W, DOWSIL TM SE 9120, DOWSIL TM One or more of 501W.

[0010] Preferably, the polysaccharide foam stabilizer is one or more of xanthan gum, guar gum, carob gum, trehalose gum or gum arabic.

[0011] Preferably, the co-solvent is one or more of diethylene glycol monobutyl ether, urea, sodium sulfate, thiazolidinone or propylene glycol.

[0012] Preferably, the preservative is one or more of disodium edetate, sodium benzoate, potassium sorbate or methyl paraben.

[0013] Preferably, the antifreeze agent is one or more of ethylene glycol, propylene glycol or glycerol.

[0014] Preferably, the regulator is one or more of citric acid, phosphoric acid, sodium chloride, potassium hydroxide or sodium carbonate.

[0015] The present invention also provides a method for preparing a highly efficient and environmentally friendly silicon-based foam fire extinguishing agent synergistically compounded with the multi-component silicon surfactant, the method comprising the following steps:

[0016] S1. Add an ionic silicon surfactant to a container and start stirring at a stirring speed of ≥100 r / min, and then add a non-ionic silicon surfactant under stirring at a speed of ≤100 L / min; after completion, stir at room temperature for more than 10 min and mix evenly to obtain a mixed raw material A;

[0017] S2, adding a polysaccharide foam stabilizer and a co-solvent into another container, and mixing them thoroughly until the polysaccharide foam stabilizer is completely dissolved in the co-solvent to obtain a mixed raw material B;

[0018] S3. Under the condition of a stirring speed ≥100r / min, add the mixed raw material B obtained in S2 to the mixed raw material A obtained in S1, and continue stirring to mix evenly; then add a preservative, stir evenly, then add an antifreeze agent, stir evenly, control the temperature to 25°C, and finally add distilled water and a regulator, adjust the pH value to between 7 and 7.5, continue stirring for 10 minutes, let it stand, eliminate foam, and obtain a high-efficiency and environmentally friendly silicon-based foam fire extinguishing agent synergistically compounded with multiple silicon surfactants.

[0019] The present invention has significant technical effects due to the adoption of the above technical solution:

[0020] 1. The present invention provides a highly efficient and environmentally friendly silicon-based foam fire extinguishing agent synergistically compounded with multiple silicon surfactants and a preparation method thereof. The method compounds ionic silicon surfactants and non-ionic silicon surfactants, and adopts more hydrophobic and oleophobic tetrasiloxane groups and common trisiloxane groups as spreading agents at the oil-water interface. The surfactant in the foam fire extinguishing agent formula contains only silicon surfactants, and does not contain banned fluorocarbon surfactants and hydrocarbon surfactants with lipophilic ends, which completely eliminates the environmental hazards of fluorocarbon surfactants and eliminates the lipophilic properties of the foam fire extinguishing agent, thereby being able to extinguish liquid fuel fires.

[0021] 2. Compared with the existing fluorine-free foam fire extinguishing agent, the high-efficiency and environmentally friendly silicon-based foam fire extinguishing agent prepared by the synergistic compounding of multi-silicon surfactants of the present invention uses silicon as the core element to prepare the foam fire extinguishing agent, and has the advantages of low surface tension, good foaming property, good film-forming and spreading property, high foam stability, good fire extinguishing and anti-burning properties, etc. The present invention has positive significance for protecting the environment, protecting human health and the sustainable development of foam fire extinguishing technology.

[0022] The present invention is further described in detail below in conjunction with embodiments. DETAILED DESCRIPTION

[0023] Example 1

[0024] This embodiment is a method for preparing a highly efficient and environmentally friendly silicon-based foam fire extinguishing agent synergistically compounded with multiple silicon surfactants.

[0025] First, an ionic silicon surfactant: tris(trimethylsilyloxy)silyl-n-propyltrimethylammonium bromide was synthesized as follows:

[0026] Step 1, under stirring reaction conditions at room temperature, using anhydrous tetrahydrofuran (THF) solvent, reacting silicon tetrachloride (SiCl4) and trimethylsilyl chloride (TMSCl) to generate a product tris(trimethylsilyloxy)silyl chloride ((TMSO)3Si-Cl);

[0027] Step 2, under stirring reaction conditions at room temperature, using anhydrous acetonitrile solvent, reacting tris(trimethylsilyloxy)silyl chloride ((TMSO)3Si-Cl) and n-propane bromide (Br(CH2)3Br) to generate a product, tris(trimethylsilyloxy)silyl n-propyl bromide ((TMSO)3Si-(CH2)3Br);

[0028] Step 3, under stirring reaction conditions at room temperature, using methanol solvent, tris(trimethylsilyloxy)silyl-n-propyl bromide ((TMSO)3Si-(CH2)3Br) and trimethylamine (N(CH3)3) are reacted to generate the target product tris(trimethylsilyloxy)silyl-n-propyltrimethylammonium bromide ((TMSO)3Si-(CH2)3-N+(CH3)3Br-);

[0029] The structural formula of tris(trimethylsilyloxy)silyl-n-propyltrimethylammonium bromide is:

[0030]

[0031] A method for preparing a highly efficient and environmentally friendly silicon-based foam fire extinguishing agent synergistically compounded with multiple silicon surfactants comprises the following steps:

[0032] S1. Add 20kg tris(trimethylsilyloxy)silyl n-propyltrimethylammonium bromide to the container and start stirring at a speed of ≥100r / min. Then, slowly add 14kg CoatOSil under stirring. TM -77, adding speed ≤100L / min; after completion, stirring at room temperature for more than 10min, mixing evenly, to obtain mixed raw material A;

[0033] S2, add 2kg guar gum and 2kg diethylene glycol monobutyl ether into another container, mix thoroughly, and obtain mixed raw material B;

[0034] S3. Under the condition of stirring speed ≥100r / min, add the mixed raw material B obtained in S2 to the mixed raw material A obtained in S1, continue stirring and mix evenly; then add 6kg of potassium sorbate, stir evenly, then add 8kg of ethylene glycol, stir evenly, control the temperature to 25°C, continue to add 40kg of distilled water, stir evenly, adjust the pH value to between 7-7.5 with citric acid and sodium carbonate, and finally add distilled water until the total mass is 100kg. After continuous stirring for 10min, let it stand to eliminate foam, and obtain 6% foam fire extinguishing agent, which is bottled, sealed and stored away from light.

[0035] Comparative Example 1

[0036] Same as Example 1, except that the nonionic surfactant BYK-345 of the same mass was used to replace the nonionic silicone surfactant CoatOSil in Example 1. TM -77, the preparation method comprises the following steps:

[0037] S1. Add 20 kg of tris(trimethylsilyloxy)silyl-n-propyltrimethylammonium bromide into a container and start stirring at a stirring speed of ≥100 r / min. Then, slowly add 14 kg of BYK-345 under stirring at a speed of ≤100 L / min. After completion, stir at room temperature for more than 10 min and mix well to obtain a mixed raw material A.

[0038] S2, add 2kg guar gum and 2kg diethylene glycol monobutyl ether into another container, mix thoroughly, and obtain mixed raw material B;

[0039] S3. Under the condition of a stirring speed of ≥100r / min, add the mixed raw material B obtained in S2 to the mixed raw material A obtained in S1, continue stirring and mix evenly; then add 6kg of potassium sorbate, stir evenly, then add 8kg of ethylene glycol, stir evenly, control the temperature to 25°C, continue to add 40kg of distilled water, stir evenly, adjust the pH value to between 7-7.5 with citric acid and sodium carbonate, then continue to add distilled water until the total mass is 100kg, continue stirring for 10min, let it stand to eliminate foam, obtain a foam fire extinguishing agent, and bottle it, seal it and store it away from light.

[0040] Example 2

[0041] This embodiment is a method for preparing a highly efficient and environmentally friendly silicon-based foam fire extinguishing agent synergistically compounded with multiple silicon surfactants, comprising the following steps:

[0042] S1, add 30kg tris(trimethylsilyloxy)silyl n-propyltrimethylammonium bromide (synthesized by the same method as in Example 1) into a container, and start stirring at a stirring speed of ≥100r / min, then slowly add 20kg Silwt TM 408, adding speed ≤ 100 L / min; after completion, stirring at room temperature for more than 10 min, mixing evenly, to obtain mixed raw material A;

[0043] S2, add 3 kg of gum arabic and 5 kg of thiazolidinone into another container, mix thoroughly, and obtain mixed raw material B;

[0044] S3. Under the condition of stirring speed ≥100r / min, add the mixed raw material B obtained in S2 to the mixed raw material A obtained in S1, continue stirring and mix evenly; then add 8kg of disodium ethylenediaminetetraacetate, stir evenly, then add 10kg of propylene glycol, stir evenly, control the temperature to 25°C, continue to add 20kg of distilled water, stir evenly, adjust the pH value to between 7-7.5 with phosphoric acid or potassium hydroxide, and finally add distilled water until the total mass is 100kg. After continuous stirring for 10min, let it stand to eliminate foam, and obtain 6% foam fire extinguishing agent, which is bottled, sealed and stored away from light.

[0045] Comparative Example 2

[0046] Same as Example 2, except that the same mass of nonionic silicone surfactant CoatOSil was used. TM -77 replaces the ionic silicon surfactant tris(trimethylsilyloxy)silyl-n-propyltrimethylammonium bromide in Example 2, and the preparation method comprises the following steps:

[0047] S1. Add 30kg CoatOSil into the container. TM-77, and start stirring, stirring speed ≥100r / min, then slowly add 20kg Silwt TM 408, adding speed ≤ 100 L / min; after completion, stirring at room temperature for more than 10 min, mixing evenly, to obtain mixed raw material A;

[0048] S2, add 3 kg of gum arabic and 5 kg of thiazolidinone into another container, mix thoroughly, and obtain mixed raw material B;

[0049] S3. Under the condition of a stirring speed of ≥100r / min, add the mixed raw material B obtained in S2 to the mixed raw material A obtained in S1, continue stirring and mix evenly; then add 8kg of disodium ethylenediaminetetraacetate, stir evenly, then add 10kg of propylene glycol, stir evenly, control the temperature to 25°C, continue to add 20kg of distilled water, stir evenly, adjust the pH value to between 7-7.5 with phosphoric acid or potassium hydroxide, then continue to add distilled water until the total mass is 100kg, continue stirring for 10min, let it stand to eliminate foam, obtain a foam fire extinguishing agent, and bottle it, seal it and store it away from light.

[0050] Example 3

[0051] This embodiment is a method for preparing a highly efficient and environmentally friendly silicon-based foam fire extinguishing agent synergistically compounded with multiple silicon surfactants.

[0052] First, an ionic silicon surfactant: sodium tris(trimethylsilyloxy)silylbutyl sulfate was synthesized as follows:

[0053] Step 1, under stirring reaction conditions at room temperature, using anhydrous tetrahydrofuran (THF) solvent, reacting silicon tetrachloride (SiCl4) and trimethylsilyl chloride (TMSCl) to generate a product tris(trimethylsilyloxy)silyl chloride ((TMSO)3Si-Cl);

[0054] Step 2: under stirring reaction conditions at room temperature, using anhydrous tetrahydrofuran (THF) solvent, react tris(trimethylsilyloxy)silyl chloride ((TMSO)3Si-Cl) and butanol ((CH2)4-OH) to generate a product tris(trimethylsilyloxy)silyl butane ((TMSO)3Si-(CH2)3-CH3);

[0055] Step 3, under low temperature (0°C) stirring reaction conditions, using anhydrous dichloromethane (CH2Cl2) solvent, tris(trimethylsilyloxy)silylbutane ((TMSO)3Si-(CH2)3-CH3) and chlorosulfonic acid (ClSO3H) react to generate a product tris(trimethylsilyloxy)silylbutanesulfonyl chloride ((TMSO)3Si-(CH2)4-SO3Cl);

[0056] Step 4: Under stirring reaction conditions at room temperature, using an aqueous solution, tris(trimethylsilyloxy)silylbutylsulfonyl chloride ((TMSO)3Si-(CH2)4-SO3Cl) and sodium hydroxide (NaOH) are reacted to generate the target product tris(trimethylsilyloxy)silylbutyl sodium sulfate ((TMSO)3Si-(CH2)4O-SO3Na);

[0057] The structural formula of sodium tris(trimethylsilyloxy)silylbutyl sulfate is:

[0058]

[0059] A method for preparing a highly efficient and environmentally friendly silicon-based foam fire extinguishing agent synergistically compounded with multiple silicon surfactants comprises the following steps:

[0060] S1. Add 25kg of tris(trimethylsilyloxy)silylbutyl sodium sulfate to the container and start stirring at a speed of ≥100r / min. Then, slowly add 18kg of CoatOSil under stirring. TM -3505, adding speed ≤100L / min; after completion, stirring at room temperature for more than 10min, mixing evenly, to obtain mixed raw material A;

[0061] S2, add 1 kg of xanthan gum, 7 kg of sodium sulfate and 2 kg of propylene glycol to another container, mix well, and obtain mixed raw material B;

[0062] S3. Under the condition of stirring speed ≥100r / min, add the mixed raw material B obtained in S2 to the mixed raw material A obtained in S1, continue stirring and mix evenly; then add 3kg of sodium benzoate, stir evenly, add 5kg of ethylene glycol, stir evenly, control the temperature to 25°C, continue to add 30kg of distilled water, stir evenly, adjust the pH value to between 7-7.5 with citric acid and sodium chloride, and finally add distilled water until the total mass is 100kg. After continuous stirring for 10min, let it stand to eliminate foam, and obtain 6% foam fire extinguishing agent, which is bottled, sealed and stored away from light.

[0063] Comparative Example 3

[0064] The same as Example 3, except that the ionic silicon surfactant tris(trimethylsilyloxy)silylbutyl sodium sulfate in Example 3 is replaced by the hydrocarbon surfactant sodium dodecyl sulfate of the same mass, the preparation method comprises the following steps:

[0065] S1. Add 25kg sodium dodecyl sulfate to the container and start stirring at a speed of ≥100r / min. Then, slowly add 18kg CoatOSil under stirring. TM-3505, adding speed ≤100L / min; after completion, stirring at room temperature for more than 10min, mixing evenly, to obtain mixed raw material A;

[0066] S2, add 1 kg of xanthan gum, 7 kg of sodium sulfate and 2 kg of propylene glycol to another container, mix well, and obtain mixed raw material B;

[0067] S3. Under the condition of stirring speed ≥100r / min, add the mixed raw material B obtained in S2 to the mixed raw material A obtained in S1, continue stirring and mix evenly; then add 3kg of sodium benzoate, stir evenly, then add 5kg of ethylene glycol, stir evenly, control the temperature to 25°C, continue to add 30kg of distilled water, stir evenly, adjust the pH value to between 7-7.5 with citric acid and sodium chloride, then continue to add distilled water until the total mass is 100kg, continue stirring for 10min, let it stand to eliminate foam, obtain foam fire extinguishing agent, bottle it, seal it and store it away from light.

[0068] The performance of the foam fire extinguishing agents prepared in Examples 1 to 3 and Comparative Examples 1 to 3 was characterized. The foam fire extinguishing agent and water were added to the foam tank at the same time, and the product of the present invention was self-tested using the method provided in Appendix A of GB15308-2006. The different test methods were compressed air foaming, the gas-liquid ratio was 1:7, the foam liquid flow rate was 0.75 L / min, and the fuel required by the specification was used. The specific test results are shown in Table 1 below.

[0069] Table 1 Performance of the foam fire extinguishing agent prepared by the present invention

[0070]

[0071] The test results show that increasing the type of silicon surfactant in the formula and changing the ratio can effectively improve the performance of the foam fire extinguishing agent, and adding the ionic and non-ionic surfactants proposed in the present invention to the foam fire extinguishing agent can effectively extinguish liquid fuel fires. Compared with the comparative example, the foam fire extinguishing agent in the embodiment has lower surface tension, better foaming properties, longer foam stability time, shorter fire extinguishing time, and better anti-burning performance. It is proved that ionic surfactants can improve the performance of foam fire extinguishing agents, and the high-efficiency and environmentally friendly silicon-based foam fire extinguishing agent with the synergistic compound of multiple silicon surfactants in the present invention has better foam stability and fire extinguishing and anti-burning performance.

[0072] Example 4

[0073] This embodiment is a method for preparing a highly efficient and environmentally friendly silicon-based foam fire extinguishing agent synergistically compounded with multiple silicon surfactants.

[0074] First, an ionic silicon surfactant: sodium tris(trimethylsilyloxy)silylbutylcarboxylate was synthesized as follows:

[0075] Step 1, using n-propanol (PrOH) solvent at room temperature or under slightly heated conditions, tetrachlorobutylsilane (Cl3Si-(CH2)4-Cl) and excess trimethylsilyl chloride (TMSCl) are reacted to generate the product tris(trimethylsilyloxy)silylbutyl chloride ((TMSO)3Si-(CH2)4-Cl);

[0076] Step 2: react tris(trimethylsilyloxy)silylbutyl chloride ((TMSO)3Si-(CH2)4-Cl) with acetic acid or other carboxylic acid in an alkaline solution (such as NaOH aqueous solution) at room temperature or under heating conditions to generate a product, sodium tris(trimethylsilyloxy)silylbutyl carboxylate ((TMSO)3Si-(CH2)4-COONa);

[0077] The structural formula of sodium tris(trimethylsilyloxy)silylbutylcarboxylate is:

[0078]

[0079] A method for preparing a highly efficient and environmentally friendly silicon-based foam fire extinguishing agent synergistically compounded with multiple silicon surfactants comprises the following steps:

[0080] S1. Add 35kg sodium tris(trimethylsilyloxy)silylbutylcarboxylate to the container and start stirring at a speed of ≥100r / min. Then, slowly add 10kg UF-1328 and 10kg DOWSIL TM SE 9120 and 10kg DOWSIL TM 501W, adding speed ≤100L / min; after completion, stirring at room temperature for more than 10min, mixing evenly, to obtain mixed raw material A;

[0081] S2, adding 2 kg of carob bean gum, 5 kg of sodium sulfate and 4 kg of thiazolidinone into another container, and mixing them thoroughly to obtain a mixed raw material B;

[0082] S3. Under the condition of stirring speed ≥100r / min, add the mixed raw material B obtained in S2 to the mixed raw material A obtained in S1, continue stirring and mix evenly; then add 5kg of methyl p-hydroxybenzoate, stir evenly, then add 5kg of ethylene glycol, stir evenly, control the temperature to 25°C, continue to add 5kg of distilled water, stir evenly, adjust the pH value to between 7-7.5 with citric acid and sodium chloride, and finally add distilled water until the total mass is 100kg. After continuous stirring for 10min, let it stand to eliminate foam, obtain 3% foam fire extinguishing agent, bottle it, seal it and store it away from light.

[0083] Example 5

[0084] This embodiment is a method for preparing a highly efficient and environmentally friendly silicon-based foam fire extinguishing agent synergistically compounded with multiple silicon surfactants.

[0085] First, an ionic silicon surfactant: sodium tris(trimethylsilyloxy)silyl-2-pentenesulfonate was synthesized as follows:

[0086] Step 1, under stirring reaction conditions at room temperature, using n-propanol (PrOH) as a solvent, reacting silicon tetrachloride (SiCl4) and trimethylsilyl chloride (TMSCl) to generate a product tris(trimethylsilyloxy)silyl chloride ((TMSO)3Si-Cl);

[0087] Step 2: At room temperature and dry conditions, using anhydrous ether solvent, tris(trimethylsilyloxy)silyl chloride ((TMSO)3Si-Cl) and 3-bromo-1-propylene Grignard reagent (CH2=CH-CH2MgBr) are reacted to generate tris(trimethylsilyloxy)silyl-3-pentene ((TMSO)3Si-(CH2)2-CH=CH2);

[0088] Step 3, under low temperature (0°C) stirring reaction conditions, using anhydrous dichloromethane solvent, tris(trimethylsilyloxy)silyl-3-pentene ((TMSO)3Si-(CH2)2-CH=CH2) and chlorosulfonic acid (ClSO3H) to react to generate the product tris(trimethylsilyloxy)silyl-2-pentenesulfonyl chloride ((TMSO)3Si-(CH2)2-CH=CH-CH2-SO3Cl);

[0089] Step 4, under stirring reaction conditions at room temperature, using an aqueous solution, tris(trimethylsilyloxy)silyl-2-butenesulfonyl chloride ((TMSO)3Si-(CH2)2-CH=CH-CH2-SO3Cl) and sodium hydroxide (NaOH) are reacted to generate a product, tris(trimethylsilyloxy)silyl-2-pentenesulfonate sodium ((TMSO)3Si-(CH2)2-CH=CH-CH2-SO3Na);

[0090] The structural formula of sodium tris(trimethylsilyloxy)silyl-2-pentenesulfonate is:

[0091]

[0092] A method for preparing a highly efficient and environmentally friendly silicon-based foam fire extinguishing agent synergistically compounded with multiple silicon surfactants comprises the following steps:

[0093] S1. Add 30 kg of sodium tris(trimethylsilyloxy)silyl-2-pentenesulfonate to the container and start stirring at a stirring speed of ≥100 r / min. Then, slowly add 15 kg of Silwt TMHS-604 and 20kg Silwt TM 618, adding speed ≤ 100 L / min; after completion, stirring at room temperature for more than 10 min, mixing evenly, to obtain mixed raw material A;

[0094] S2, adding 1 kg of guar gum, 1 kg of trehalose gum, 5 kg of urea and 4 kg of propylene glycol into another container, and mixing them thoroughly to obtain a mixed raw material B;

[0095] S3. Under the condition of stirring speed ≥100r / min, add the mixed raw material B obtained in S2 to the mixed raw material A obtained in S1, continue stirring and mix evenly; then add 5kg of disodium ethylenediaminetetraacetate, stir evenly, then add 5kg of glycerol, stir evenly, control the temperature to 25°C, continue to add 5kg of distilled water, stir evenly, adjust the pH value to between 7-7.5 with citric acid and sodium chloride, and finally add distilled water until the total mass is 100kg. After continuous stirring for 10min, let it stand to eliminate foam, and obtain 3% foam fire extinguishing agent, which is bottled, sealed and stored away from light.

[0096] The present invention uses a compound of an ionic silicon surfactant and a nonionic silicon surfactant, and uses hydrophobic and oleophobic tetrasiloxane and trisiloxane groups as spreading agents at the oil-water interface, completely eliminating the environmental hazards of fluorocarbon surfactants and greatly reducing the lipophilic properties of foam fire extinguishing agents, and can extinguish liquid fuel fires. The present invention has positive significance for protecting the environment, protecting human health, and the sustainable development of foam fire extinguishing technology.

[0097] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent change made to the above embodiment according to the technical essence of the invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A highly efficient and environmentally friendly silicon-based foam fire extinguishing agent synergistically compounded with multiple silicon surfactants, characterized in that: The invention is composed of the following raw materials in the following mass percentages: 5% to 35% of ionic silicon surfactant, 5% to 35% of non-ionic silicon surfactant, 0.1% to 3% of polysaccharide foam stabilizer, 1% to 10% of cosolvent, 0.1% to 10% of preservative, 1% to 10% of antifreeze agent, 0.1% to 5% of regulator, and the balance is deionized water.

2. The foam fire extinguishing agent according to claim 1, characterized in that: The ionic silicon surfactant is a siloxane surfactant whose hydrophobic group is tri(trimethylsiloxy)silyl, and has the structural formula: Where R1 is C n H 2n or C n H 2n-2 or a combination of two carbon chains, the total length of the carbon chain is 1 to 6, and R2 is an ionic hydrophilic group, including one or more of quaternary ammonium salts, carboxylates, sulfates or sulfonates.

3. The foam fire extinguishing agent according to claim 1, characterized in that: The nonionic silicon surfactant is Silwt TM HS-604、Silwt TM 408、Silwt TM 618、CoatOSil TM -77, CoatOSil TM -3505, CoatOSil TM -1770、UF-1328、UF-5880、UF-6680、VORASURF TM DC 5900, DOWSIL TM 502W, DOWSIL TM SE 9120, DOWSIL TM One or more of 501W.

4. The foam fire extinguishing agent according to claim 1, characterized in that: The polysaccharide foam stabilizer is one or more of xanthan gum, guar gum, carob gum, trehalose gum or gum arabic.

5. The foam fire extinguishing agent according to claim 1, characterized in that: The co-solvent is one or more of diethylene glycol monobutyl ether, urea, sodium sulfate, thiazolidinone or propylene glycol.

6. The foam fire extinguishing agent according to claim 1, characterized in that: The preservative is one or more of disodium edetate, sodium benzoate, potassium sorbate or methyl parahydroxybenzoate.

7. The foam fire extinguishing agent according to claim 1, characterized in that: The antifreeze agent is one or more of ethylene glycol, propylene glycol or glycerol.

8. The foam fire extinguishing agent according to claim 1, characterized in that: The regulator is one or more of citric acid, phosphoric acid, sodium chloride, potassium hydroxide or sodium carbonate.

9. A method for preparing a highly efficient and environmentally friendly silicon-based foam fire extinguishing agent prepared by synergistically compounding a multi-component silicon surfactant as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Add an ionic silicon surfactant to a container and start stirring at a stirring speed of ≥100 r / min, and then add a non-ionic silicon surfactant under stirring at a speed of ≤100 L / min; after completion, stir at room temperature for more than 10 min and mix evenly to obtain a mixed raw material A; S2, adding a polysaccharide foam stabilizer and a co-solvent into another container, and mixing them thoroughly until the polysaccharide foam stabilizer is completely dissolved in the co-solvent to obtain a mixed raw material B; S3. Under the condition of a stirring speed ≥100r / min, add the mixed raw material B obtained in S2 to the mixed raw material A obtained in S1, and continue stirring to mix evenly; then add a preservative, stir evenly, then add an antifreeze agent, stir evenly, control the temperature to 25°C, and finally add distilled water and a regulator, adjust the pH value to between 7 and 7.5, continue stirring for 10 minutes, let it stand, eliminate foam, and obtain a high-efficiency and environmentally friendly silicon-based foam fire extinguishing agent synergistically compounded with multiple silicon surfactants.

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