Insulating flame-retardant automatic fire extinguishing paste and preparation method thereof

Abstract

The invention relates to an insulating flame-retardant automatic fire extinguishing paste and a preparation method thereof. The insulating flame-retardant fire extinguishing patch comprises a bottom film, an adhesive layer and an insulating flame-retardant layer, the insulating flame-retardant layer is prepared from the following components in parts by weight: 20 to 60 parts of perfluoro-2-methyl-3-pentanone microcapsules, 20 to 30 parts of polydimethylsiloxane, 0.1 to 5 parts of magnesium hydroxide, 0.1 to 5 parts of triphenyl phosphate, 0.5 to 5 parts of tributyl phosphate, 0.1 to 5 parts of tris (2-ethylhexyl) phosphate, 0.2 to 5 parts of tris (2, 3-dichloropropyl) phosphate, 0.2 to 5 parts of tetrabromobisphenol A epoxy resin, 0.5 to 3 parts of antimony trioxide and 0.1 to 5 parts of borate. 0.1 to 5 parts of dichlorobromomethane and 0.1 to 5 parts of trichlorobromomethane. The insulating flame-retardant fire extinguishing paste is easy to install, does not need maintenance, actively extinguishes fire when a fire occurs in the initial stage, can achieve the effect of multiple times of fire extinguishing, can effectively prevent reburning and fire expansion, and is safe, green and environmentally friendly.

Description

Technical Field

[0001] The invention relates to the technical field of chemical fire extinguishing, and in particular to an insulating flame-retardant automatic fire extinguishing sticker and a preparation method thereof. Background Art

[0002] Most of the existing traditional fire extinguishing products rely on manual operation, especially when a fire occurs, manual intervention is required to activate the fire extinguishing system. However, when a fire occurs in a confined or narrow space, due to the lack of effective monitoring equipment in these areas, people are often unable to detect the fire at the first time of the fire, causing the fire to spread rapidly, resulting in irreparable economic losses and safety hazards.

[0003] In recent years, new fire extinguishing media such as microcapsules have gradually been introduced into the fire protection field. This type of technology encapsulates the fire extinguishing agent in microcapsules, which automatically releases the fire extinguishing agent when encountering high temperature or flames. It can quickly suppress the fire in the early stage of the fire without relying on manual operation. Therefore, it has shown significant advantages in improving fire extinguishing efficiency and reducing the waste of fire extinguishing media, and is particularly suitable for automatic fire extinguishing systems. However, despite the great potential of microcapsule fire extinguishing technology, existing products still need to be further optimized. Summary of the invention

[0004] The invention provides an insulating flame-retardant automatic fire-extinguishing patch and a preparation method thereof.

[0005] The present invention first provides an insulating flame retardant fire extinguishing material, which comprises, by weight:

[0006] 20-60 parts of perfluoro 2-methyl-3-pentanone microcapsules,

[0007] Polydimethylsiloxane (PDMS) 20-30 parts,

[0008] 0.1-5 parts of magnesium hydroxide,

[0009] Triphenyl Phosphate (TPP) 0.1-5 parts,

[0010] Tributyl Phosphate (TBP) 0.5-5 parts,

[0011] Tri(2-ethylhexyl) phosphate (TEHP) 0.1-5 parts,

[0012] Tris(2,3-dichloropropyl)phosphate (TDCPP) 0.2-5 parts,

[0013] Tetrabromobisphenol A epoxy resin (TBBPA-EP) 0.2-5 parts,

[0014] Antimony trioxide 0.5-3 parts,

[0015] 0.1-5 parts of borate,

[0016] 0.1-5 parts of dichlorobromomethane,

[0017] Bromotrichloromethane 0.1-5 parts.

[0018] Preferably, the insulating flame retardant fire extinguishing material comprises, by weight:

[0019] 50 parts of perfluoro 2-methyl-3-pentanone microcapsules,

[0020] 25 parts of polydimethylsiloxane,

[0021] 3 parts of magnesium hydroxide,

[0022] 2 parts of triphenyl phosphate,

[0023] 3 parts of tributyl phosphate,

[0024] 2 parts of tri(2-ethylhexyl) phosphate,

[0025] 1.5 parts of tris(2,3-dichloropropyl) phosphate,

[0026] 2.5 parts of tetrabromobisphenol A epoxy resin,

[0027] 1 part antimony trioxide,

[0028] 2 parts of borate,

[0029] 2.5 parts of dichlorobromomethane,

[0030] 2 parts of bromotrichloromethane.

[0031] Existing perfluoro-2-methyl-3-pentanone microcapsules (also known as perfluorohexanone microcapsules) will rupture when encountering a fire source, releasing perfluorohexanone and quickly extinguishing the flames. However, the inventors found that perfluoro-2-methyl-3-pentanone microcapsules or fire extinguishing patches made from this material cannot effectively retard themselves, and sometimes even "fire" occurs. In addition, in high humidity environments (such as the rainy season), this type of fire extinguishing patch is also prone to gas leakage, and the product fails.

[0032] In order to solve this problem, the inventors found through research that adding polydimethylsiloxane can effectively improve its flame retardant properties. Although other types of silicone oils can also alleviate the above-mentioned "fire" problem to a certain extent, they cannot combine well with perfluoro-2-methyl-3-pentanone microcapsules and may damage the shell structure of the microcapsules, thus limiting their application. Polydimethylsiloxane can maintain the structural integrity of the microcapsules while improving the flame retardant properties, thereby better meeting the needs of practical applications.

[0033] The other components of the insulating flame retardant fire extinguishing material of the present invention are mainly used as flame retardants or flame retardant additives to further improve the flame retardant properties of the insulating flame retardant fire extinguishing material.

[0034] In the present invention, the perfluoro-2-methyl-3-pentanone microcapsule is a novel, safe and environmentally friendly fire extinguishing material, which is a perfluorohexanone fire extinguishing agent encapsulated in a flame retardant polymer shell to form an efficient fire extinguishing system. It can be prepared according to existing methods and is not particularly limited in the present invention.

[0035] In the formulation of the present invention, polydimethylsiloxane can provide good flexibility, high and low temperature resistance, hydrophobicity and electrical insulation in addition to the above functions.

[0036] Magnesium hydroxide is mainly used as an inorganic flame retardant. It can decompose and release water at high temperatures, playing a flame retardant and heat-absorbing role.

[0037] Triphenyl phosphate is mainly used as a flame retardant plasticizer to provide additional flame retardant properties and enhance the processability of the material.

[0038] Tributyl phosphate, as another flame retardant plasticizer, helps to improve the flexibility and fire resistance of the material.

[0039] Tri(2-ethylhexyl) phosphate, as a plasticizer and flame retardant, is beneficial to improving the fluidity and flame retardant effect of the material.

[0040] Tris(2,3-dichloropropyl) phosphate and tetrabromobisphenol A epoxy resin further improve the flame retardant properties.

[0041] Antimony trioxide is used as a synergist of halogen flame retardants to enhance the flame retardant effect of materials.

[0042] Borates act as flame retardants and smoke suppressants, helping to reduce smoke generation during a fire.

[0043] Dichlorobromomethane is used as a flame retardant to provide a halogen-based flame retardant effect.

[0044] Bromotrichloromethane is used as a halogen flame retardant to enhance flame retardancy and inhibit flame spread.

[0045] The combination of the above ingredients provides strong flame retardant properties while maintaining the material's processability, flexibility and durability.

[0046] In the present invention, borates include boric acid (H3BO3), borax (sodium borate, Na2B4O7·10H2O) and the like.

[0047] According to needs, the insulating flame retardant fire extinguishing material of the present invention may further include pigments.

[0048] The present invention also provides a method for preparing the insulating flame retardant fire extinguishing material, which comprises mixing the components according to a formula to prepare the insulating flame retardant fire extinguishing material.

[0049] The present invention also provides an insulating flame retardant fire extinguishing patch, comprising a base film, an adhesive layer and an insulating flame retardant layer connected in sequence; the insulating flame retardant layer is made of the insulating flame retardant fire extinguishing material.

[0050] The present invention also provides a method for preparing the insulating flame retardant fire extinguishing patch, comprising:

[0051] Mixing the components of the insulating flame-retardant fire-extinguishing material according to a formula to form an insulating flame-retardant layer;

[0052] Apply glue on one side of the insulating flame retardant layer to form a glue layer;

[0053] A release film is attached to the adhesive layer as a base film.

[0054] Generally, the insulating flame retardant layer can be made by coating. After the components of the insulating flame retardant fire extinguishing material are mixed according to the formula, it is a thick semi-solid material, which is coated to form the insulating flame retardant layer. After it is dry, glue is applied on one side as a glue layer, and then a release film (or strong double-sided tape) is attached as a base film.

[0055] Normally, one piece of insulating flame-retardant fire-extinguishing sticker with a size of 10cm×10cm can be used for every 10-12 cubic decimeters of space. In actual use, the fire-extinguishing sticker can be pasted on the objects that need to be protected, such as electrical boxes, chassis, electrical cabinets and other areas that are prone to high temperatures or fire points. In confined spaces, its fire-extinguishing effect is particularly significant. When the temperature of equipment such as electrical boxes, chassis or electrical cabinets reaches a certain height or a fire occurs, the fire-extinguishing sticker will quickly release the internal composite chemical substances to play a role in flame retardancy, oxygen isolation and temperature reduction, thereby quickly extinguishing the fire and eliminating the hidden dangers of fire in the bud. The fire-extinguishing sticker can not only effectively reduce temperature, flame retardant, and extinguish fire, but also prevent the fire source from reigniting and avoid greater losses. In addition, it has the ability to extinguish fires multiple times, and can continue to play a role even in the case of reignition, minimizing losses.

[0056] The main mechanism of the insulating flame retardant fire extinguishing sticker of the present invention is:

[0057] When the temperature inside the closed environment reaches or exceeds 125℃, the insulating flame retardant layer will undergo a strong endothermic reaction at high temperature. When heated, the insulating flame retardant layer decomposes non-combustible gas, dilutes the combustible gas generated by the decomposition of the combustible, and reduces its concentration to below the lower limit of combustion. At the same time, the released non-combustible gas also dilutes the oxygen concentration in the combustion zone, effectively preventing the continued combustion and playing a flame retardant effect. In addition, the insulating flame retardant layer reduces the temperature of the surface of the combustible by absorbing part of the heat released by the combustion, thereby effectively inhibiting the generation of combustible gas and preventing the spread of the fire. At the same time, the insulating flame retardant layer can also stabilize the foam covering layer, play the role of isolating oxygen and heat insulation, and prevent the combustible gas from spreading outward. The composite chemical substances released by the insulating flame retardant layer further isolate oxygen and reduce the temperature, and quickly extinguish the fire. In this way, the hidden dangers of fire can be eliminated in the bud, achieving the multiple effects of cooling, flame retardancy, fire extinguishing, and preventing re-ignition, thereby avoiding greater losses.

[0058] In some embodiments, the drug loading of the insulating flame retardant fire extinguishing patch of the present invention is ≥60%, it automatically responds within 5 seconds, and achieves active fire extinguishing effect in about 15 seconds. Under normal circumstances, the use environment: -10℃ to 90℃, ambient humidity: HR<85%, response temperature: 110±10℃. When the space temperature reaches 105℃ or an open flame, active detection and automatic excitation are used to accurately extinguish the fire. Recommended working distance: 5-200mm; insulation: strong; resistance value>2000 megohms at 500V voltage, release pressure: pressure-free release; release phenomenon: no deflagration; dust residue: almost no residue.

[0059] The insulating flame-retardant fire-extinguishing sticker of the present invention is suitable for a variety of typical application places, including electric control boxes, distribution cabinets, chassis, the inside of energy storage batteries, smart charging and battery replacement cabinets, computer rooms, data centers, aviation, ships, vehicles, libraries, oil and natural gas production facilities, data cabinets and other closed environments.

[0060] The insulating flame-retardant fire-extinguishing patch of the present invention has the following outstanding advantages: it has unique smoothness, softness and hydrophobicity, and exhibits excellent chemical stability, electrical insulation and high and low temperature resistance. The fire-extinguishing patch has a high flash point and a low freezing point, and can be used for a long time in a temperature range of -10°C to +90°C. At the same time, it has a small viscosity-temperature coefficient, a large compressibility, and a low surface tension, and has good waterproof and moisture-proof properties, and a small specific heat and thermal conductivity. In addition, the material also has excellent heat resistance, electrical insulation, weather resistance, hydrophobicity, physiological inertness, and low surface tension. In electrical applications, it can withstand high breakdown voltages, has excellent arc resistance and corona resistance, and is non-toxic and environmentally friendly.

[0061] The insulating flame retardant fire extinguishing patch of the present invention can still extinguish fires multiple times when the fire re-ignites, ensuring that the fire source will not spread further. In particular, due to the addition of polydimethylsiloxane, on the one hand, the flame retardant properties of the material itself are significantly improved, and on the other hand, the polydimethylsiloxane can be tightly combined with the perfluoro-2-methyl-3-pentanone microcapsules without damaging the shell structure of the microcapsules, so that it can exert a stable fire extinguishing effect.

[0062] The insulating flame-retardant fire-extinguishing patch of the present invention is easy to install, requires no maintenance, actively extinguishes fire when an initial fire occurs, can effectively prevent re-ignition and prevent the fire from expanding, and is safe, green and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 This is a product photo of the insulating flame retardant fire extinguishing sticker according to an embodiment of the present invention.

[0064] Figure 2 This is the flame retardant performance test process of the insulating flame retardant fire extinguishing patch according to the embodiment of the present invention. DETAILED DESCRIPTION

[0065] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but should be understood as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0066] The following perfluoro-2-methyl-3-pentanone microcapsules were purchased from Hefei Zhongke Chuangwei Technology Co., Ltd.

[0067] Example 1

[0068] This embodiment provides an insulating flame retardant fire extinguishing material, and its formula is as follows (by weight): 50 parts of perfluoro 2-methyl-3-pentanone microcapsules, 25 parts of polydimethylsiloxane, 3 parts of magnesium hydroxide, 2 parts of triphenyl phosphate, 3 parts of tributyl phosphate, 2 parts of tri(2-ethylhexyl) phosphate, 1.5 parts of tri(2,3-dichloropropyl) phosphate, 2.5 parts of tetrabromobisphenol A epoxy resin, 1 part of antimony trioxide, 2 parts of borax, 2.5 parts of dichlorobromomethane, and 2 parts of trichlorobromomethane. According to the formula, the insulating flame retardant fire extinguishing material can be obtained by mixing the components.

[0069] This embodiment also provides an insulating flame retardant fire extinguishing sticker, comprising a base film, a glue layer and an insulating flame retardant layer connected in sequence; the insulating flame retardant layer is made of the insulating flame retardant fire extinguishing material of this embodiment. The preparation method comprises: mixing the components of the insulating flame retardant fire extinguishing material according to the formula to obtain a thick semi-solid material, and coating it to form an insulating flame retardant layer. After it dries, glue is applied on one side, and then a release film (or strong double-sided tape) is attached as the base film.

[0070] The product photos of the insulating flame retardant fire extinguishing sticker of this embodiment can be found in Figure 1 .

[0071] Example 2

[0072] This embodiment provides an insulating flame retardant fire extinguishing material, and its formula is as follows (by weight): 20 parts of perfluoro 2-methyl-3-pentanone microcapsules, 20 parts of polydimethylsiloxane, 0.1 parts of magnesium hydroxide, 0.1 parts of triphenyl phosphate, 0.5 parts of tributyl phosphate, 0.1 parts of tri(2-ethylhexyl) phosphate, 0.2 parts of tri(2,3-dichloropropyl) phosphate, 0.2 parts of tetrabromobisphenol A epoxy resin, 0.5 parts of antimony trioxide, 0.1 parts of borax, 0.1 parts of dichlorobromomethane, and 0.1 parts of trichlorobromomethane. According to the formula, the insulating flame retardant fire extinguishing material can be obtained by mixing the components.

[0073] This embodiment also provides an insulating flame retardant fire extinguishing patch, comprising a base film, an adhesive layer and an insulating flame retardant layer connected in sequence; the insulating flame retardant layer is made of the insulating flame retardant fire extinguishing material of this embodiment. The preparation method is the same as that of embodiment 1.

[0074] Example 3

[0075] This embodiment provides an insulating flame retardant fire extinguishing material, and its formula is as follows (by weight): 60 parts of perfluoro 2-methyl-3-pentanone microcapsules, 30 parts of polydimethylsiloxane, 5 parts of magnesium hydroxide, 5 parts of triphenyl phosphate, 5 parts of tributyl phosphate, 5 parts of tri(2-ethylhexyl) phosphate, 5 parts of tri(2,3-dichloropropyl) phosphate, 5 parts of tetrabromobisphenol A epoxy resin, 3 parts of antimony trioxide, 5 parts of borax, 5 parts of dichlorobromomethane, and 5 parts of trichlorobromomethane. According to the formula, the insulating flame retardant fire extinguishing material can be obtained by mixing the components.

[0076] This embodiment also provides an insulating flame retardant fire extinguishing patch, comprising a base film, an adhesive layer and an insulating flame retardant layer connected in sequence; the insulating flame retardant layer is made of the insulating flame retardant fire extinguishing material of this embodiment. The preparation method is the same as that of embodiment 1.

[0077] Comparative Example 1

[0078] The insulating flame retardant fire extinguishing patch of this comparative example is different from Example 1 only in that the insulating flame retardant fire extinguishing material does not contain polydimethylsiloxane.

[0079] Comparative Example 2

[0080] The insulating flame retardant fire extinguishing patch of this comparative example is different from Example 1 only in that the polydimethylsiloxane in the insulating flame retardant fire extinguishing material is replaced by the silicone oil in the following Table 1.

[0081] Table 1

[0082] Insulation flame retardant fire extinguishing sticker number Silicone oil Comparative Example 2-1 Polymethylchlorosilane Comparative Example 2-2 Polyphenylmethylsiloxane Comparative Examples 2-3 Polyethyldimethylsiloxane Comparative Examples 2-4 Perfluorinated Silicones

[0083] Experiment 1: Experiment to investigate the flame retardant properties of insulating flame retardant fire extinguishing materials

[0084] The same size of the insulating flame retardant fire extinguishing stickers of Examples 1-3 and Comparative Examples 1-2 are respectively pasted on Figure 2 The test chamber is shown in the figure and placed in an environment with a temperature of 25-35°C and a relative humidity of 80%-85% for 60 months.

[0085] The results showed that the insulating flame retardant fire extinguishing patches of Examples 1-3 did not fail, among which Example 1 had the best effect; the insulating flame retardant fire extinguishing patch of Comparative Example 1 leaked gas and the product failed; the insulating flame retardant fire extinguishing patch of Comparative Example 2 also did not leak gas, but its silicone oil could not combine well with the perfluoro-2-methyl-3-pentanone microcapsules, and it was speculated that it had damaged the shell structure of the microcapsules.

[0086] Experiment 2: Flame retardant performance experiment of insulating flame retardant fire extinguishing sticker

[0087] The specific experimental process is as follows Figure 2 As shown, af represents different stages of the experimental process.

[0088] Prepare two metal cabinets with doors of the same specifications; Pour an appropriate amount of n-heptane into a metal container (such as an aluminum lunch box), and then place it on the iron stand inside the metal cabinet; Figure 2 The insulating flame retardant fire extinguishing sticker of Example 1 is pasted on the inner top of the right side of the cabinet; ignite the fire, close the cabinet door, and ensure that the metal cabinet is a relatively closed space; the metal cabinet (i.e. Figure 2 The fire was extinguished in about 15 seconds. The cabinet door was opened and the fire was ignited again to simulate the re-ignition phenomenon. The fire was extinguished again in about 15 seconds. The fire was extinguished again after repeated ignition. The metal cabinet without fire extinguishing stickers (i.e. Figure 2 Left) The fire continued throughout the process.

[0089] Three similar products on the market were tested using the same method and their fire extinguishing effects were significantly worse than that of the fire extinguishing patch in Example 1 of the present invention.

[0090] The experimental results show that the insulating flame-retardant fire-extinguishing patch of the present invention has a good fire-extinguishing effect, actively extinguishes the fire when it occurs in the initial stage, can achieve multiple fire-extinguishing effects, and can effectively prevent re-ignition.

[0091] With respect to the above description of the disclosed embodiments, the features described in the various embodiments in this specification may be replaced or combined with each other to enable professionals in the field to implement or use the present invention. Various modifications to these embodiments will be apparent to professionals in the field, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An insulating flame-retardant automatic fire-extinguishing material, characterized in that: In parts by weight: 20-60 parts of perfluoro 2-methyl-3-pentanone microcapsules, 20-30 parts of polydimethylsiloxane, 0.1-5 parts of magnesium hydroxide, Triphenyl phosphate 0.1-5 parts, Tributyl phosphate 0.5-5 parts, 0.1-5 parts of tri(2-ethylhexyl) phosphate, Tris(2,3-dichloropropyl) phosphate 0.2-5 parts, 0.2-5 parts of tetrabromobisphenol A epoxy resin, Antimony trioxide 0.5-3 parts, 0.1-5 parts of borate, 0.1-5 parts of dichlorobromomethane, Bromotrichloromethane 0.1-5 parts.

2. The insulating flame retardant fire extinguishing material according to claim 1, characterized in that: The composition comprises, by weight: 50 parts of perfluoro-2-methyl-3-pentanone microcapsules, 25 parts of polydimethylsiloxane, 3 parts of magnesium hydroxide, 2 parts of triphenyl phosphate, 3 parts of tributyl phosphate, 2 parts of tri(2-ethylhexyl) phosphate, 1.5 parts of tris(2,3-dichloropropyl) phosphate, 2.5 parts of tetrabromobisphenol A epoxy resin, 1 part antimony trioxide, 2 parts of borate, 2.5 parts of dichlorobromomethane, 2 parts of bromotrichloromethane.

3. A method for preparing an insulating flame retardant fire extinguishing material, characterized in that: Including mixing the components according to the formula.

4. An insulating flame retardant fire extinguishing sticker, characterized in that: It comprises a base film, an adhesive layer and an insulating flame retardant layer which are connected in sequence; the insulating flame retardant layer is made of the insulating flame retardant fire extinguishing material according to claim 1 or 2.

5. The method for preparing the insulating flame retardant fire extinguishing patch according to claim 4, characterized in that: include: Mixing the components of the insulating flame-retardant fire-extinguishing material according to a formula to form an insulating flame-retardant layer; Apply glue on one side of the insulating flame retardant layer to form a glue layer; A release film is attached to the adhesive layer as a base film.

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