Fireproof and heat-insulating composition capable of being vitrified, adhesive tape and preparation method and application thereof

Abstract

The invention discloses a ceramic fireproof heat-insulating composition, an adhesive tape, and a preparation method and application of the ceramic fireproof heat-insulating composition and the adhesive tape. The composition comprises the following components in parts by mass: 15-45 parts of acrylate oligomer; 5-25 parts by mass of a reactive diluent; 5-25 parts by mass of a skeleton filler; 15-40 parts by mass of a fluxing agent; 10 to 25 parts by mass of a flame retardant; and 0.4 to 2 parts by mass of a photoinitiator. The composition and the adhesive tape containing the composition and having various structures have excellent mechanical properties in a normal state, can be sintered to form a high-strength ceramic shell protection layer when a fire disaster occurs, have efficient fireproof and heat insulation effects, also have excellent anti-cracking performance, and can be applied to the field of fireproof and heat insulation. And the fireproof requirements under different degrees of fire disasters can be met.

Description

Technical Field

[0001] The present invention relates to a ceramic fireproof and heat-insulating composition, an adhesive tape, and a preparation method and application thereof. The ceramic composition can be ceramicized in the event of a fire, and a layer of high-temperature-resistant and strong ceramic shell is formed in situ, meeting the fire protection requirements under various conditions. Background Art

[0002] With the rapid development of electrical equipment, electronics industry, new energy vehicles, chemical energy storage batteries and other fields, higher requirements are placed on the safety of batteries. When batteries encounter various mechanical or thermal abuses, they will experience extreme situations of high temperature and even open flame thermal runaway. At present, fireproof materials made of polymers such as mica, aerogel, fireproof fiber felt, rubber, thermoplastic polyethylene, polypropylene, ethylene-vinyl acetate co-flame retardant plastic sheets, ceramic silicone rubber polymers, etc. are commonly used at home and abroad for thermal runaway protection of structures such as battery components. When electronic and electrical batteries using these fireproof materials experience thermal runaway due to various abuses, these fireproof materials can block heat conduction when encountering combustion, avoiding the occurrence of larger-scale and harmful heat spread. However, the mica material itself has a high density and strong rigidity, and its installation scenarios are limited. Aerogel felt is expensive, and it cannot effectively resist the high temperature impact caused by battery thermal runaway in extreme scenarios. Ceramic silicone rubber has good flexibility under normal conditions. At the same time, after thermal runaway occurs, it can undergo a ceramic phase change at high temperature to form a ceramic layer that effectively inhibits heat spread. However, silicone rubber is prone to cracking after continuous flame burning, which greatly reduces its fireproof effect.

[0003] Therefore, battery protection products with high-efficiency fire prevention, fire resistance or heat insulation properties and good anti-cracking performance are an urgent need for the development of high-safety performance batteries. Summary of the invention

[0004] The purpose of the present invention is to provide a ceramicizable fireproof and heat-insulating composition, an adhesive tape, and a preparation method and application thereof, wherein the composition has fireproof and heat-insulating properties, anti-cracking properties, and good mechanical properties. The adhesive tape obtained by UV curing the composition can be used in products such as battery components and systems, and can be ceramicized under high-temperature combustion conditions to form a heat-insulating and anti-cracking protective layer, thereby being effectively used for thermal runaway protection in different scenarios.

[0005] In a first aspect, an embodiment of the present invention provides a ceramic fireproof and heat-insulating composition, the raw materials of which include the following components:

[0006] Acrylate oligomer: 15-45 parts by mass;

[0007] Active diluent: 5-25 parts by weight;

[0008] Skeleton filler: 5-25 parts by mass;

[0009] Flux: 15-40 parts by mass;

[0010] Flame retardant: 10 to 25 parts by mass; and

[0011] Photoinitiator: 0.4 to 2 parts by mass.

[0012] Optionally, the mass parts of the acrylic ester oligomer is 15-30; the mass parts of the reactive diluent is 5-20; and the mass parts of the flux is 20-35.

[0013] Optionally, the acrylate oligomer includes at least one of aromatic acrylate, epoxy acrylate, polyester acrylate and aliphatic polyurethane acrylate.

[0014] Optionally, the functionality of the acrylate oligomer is 2, and at a temperature of 60° C., the viscosity of the acrylate oligomer is 5000-50000 cps.

[0015] Optionally, the reactive diluent is a monofunctional acrylate monomer.

[0016] Optionally, the reactive diluent includes at least one of alicyclic acrylate, alkyl acrylate, and aromatic acrylate.

[0017] Optionally, the skeleton filler is an inorganic filler having a melting point greater than 1000°C.

[0018] Optionally, the skeleton filler includes at least one of kaolin, mica powder, talc, clay, montmorillonite, bentonite, wollastonite, surface-modified wollastonite, magnesium oxide, aluminum oxide, zirconium oxide, silicon dioxide, titanium dioxide, silicon carbide, mullite, feldspar, and attapulgite; and / or

[0019] The particle size of the skeleton filler is 5-75um.

[0020] Optionally, the skeleton filler is wollastonite with a particle size of 5-45 um and an aspect ratio of 12:1-20:1.

[0021] Optionally, the wollastonite is surface-modified wollastonite, and the modifier includes at least one of stearic acid, titanate, aluminate, 3-(methacryloyloxy)propyltrimethoxysilane, and γ-(2,3-epoxypropoxy)propyltrimethoxysilane.

[0022] Optionally, the flux includes at least one of phosphate glass, borate glass, silicate glass, zinc borate, boron oxide, and zinc oxide; and / or

[0023] The flux softening point is 400-700°C; and / or

[0024] The particle size of the flux is 5 to 40 um.

[0025] Optionally, the flame retardant includes at least one of aluminum hydroxide, magnesium hydroxide, type II ammonium polyphosphate, melamine polyphosphate, tricresyl phosphate, butyl triphenyl phosphate, tri(2-ethylhexyl) phosphate, 2-ethylhexyl diphenyl phosphate, isopropylated triphenyl phosphate and aryl phosphate oligomer.

[0026] Optionally, it further comprises: a heat insulating functional filler, wherein the mass parts of the heat insulating functional filler are 1-6.

[0027] Optionally, the heat-insulating functional filler is a hollow microsphere, and the hollow microsphere includes at least one of a hollow microsphere of ceramic, glass, titanium dioxide, zirconium oxide, silicon dioxide, phenolic resin, and styrene material; and / or

[0028] The average particle size of the heat-insulating functional filler is 1-300 um, and the compressive strength is greater than 5 MPa.

[0029] Optionally, it further comprises: reinforcing fibers, wherein the weight percentage of the reinforcing fibers is 1-5.

[0030] Optionally, the reinforcing fibers include at least one of chopped fibers and loose fibers, the chopped fibers are made of at least one of glass, silica, alumina, zirconia, and titanium dioxide; the loose fibers are made of at least one of alkaline earth silicate fibers and aluminum silicate fibers; and / or

[0031] The length of the reinforcing fibers is 1-5 mm; and / or

[0032] The diameter of the reinforcing fiber is 5-15um.

[0033] In a second aspect, an embodiment of the present invention provides an adhesive tape, comprising:

[0034] a). Enhancement layer;

[0035] b) A composition layer, wherein at least one side of the reinforcement layer is provided with a composition layer, and the composition layer comprises the composition described in the above embodiment.

[0036] Optionally, the reinforcement layer is selected from at least one of a fiber fabric layer, mica paper, and high-silica cloth.

[0037] Optionally, the fiber fabric layer is selected from at least one of glass fiber, basalt fiber, ceramic fiber, silicate fiber, and high-silica fiber.

[0038] Optionally, the adhesive tape further comprises:

[0039] an adhesive layer, the adhesive layer being disposed on a side of the reinforcement layer away from the composition layer; and / or

[0040] The adhesive layer is arranged on a side of the composition layer away from the reinforcement layer.

[0041] Optionally, the adhesive tape further comprises:

[0042] An adhesive layer, wherein the adhesive layer is disposed on a side of the reinforcing layer away from the composite layer, and the adhesive layer is disposed on a side of the composite layer away from the reinforcing layer;

[0043] A functional layer is provided on a side of the adhesive layer away from the reinforcement layer, and the functional layer includes at least one of an insulating layer, a heat-insulating layer, and a reinforcing layer.

[0044] Optionally, the functional layer comprises at least one of mica paper, alkaline earth silicate fiber paper, fiber braid, and aerogel foam; and / or

[0045] The thickness of the functional layer is 0.1-1.0 mm.

[0046] Optionally, the thickness of the adhesive layer is 25-100 um; and / or

[0047] The adhesive layer is a flame retardant layer.

[0048] Optionally, the thickness of the reinforcement layer is 0.1 to 1.3 mm; and / or

[0049] The thickness of the composition layer is 0.1 to 3.0 mm; and / or

[0050] The thickness of the adhesive tape is 0.2-3 mm.

[0051] In a third aspect, an embodiment of the present invention provides a method for preparing an adhesive tape, comprising:

[0052] 1) Mixing and dispersing the raw materials in the composition described in the above embodiment to obtain a ceramic fireproof and heat-insulating composition slurry;

[0053] 2) coating the ceramic fireproof and heat-insulating composition slurry on the surface of the reinforcement layer and curing it to obtain the tape substrate;

[0054] 3) directly applying a pressure-sensitive adhesive to the side of the reinforcing layer away from the composition layer and / or the side of the composition layer away from the reinforcing layer; or

[0055] The adhesive tape is obtained by laminating a pressure-sensitive adhesive film to a side of the reinforcing layer away from the composition layer and / or a side of the composition layer away from the reinforcing layer.

[0056] The embodiments of the present invention also provide the use of the adhesive tape described in the above embodiments for fire prevention and heat insulation in thermal runaway of battery components.

[0057] In the composition of the embodiment of the present invention, the acrylate oligomer may include at least one of modified or unmodified acrylate polymers and acrylate monomers. The acrylate oligomer is easy to coat on the lining layer, and the acrylate oligomer is easy to achieve photocuring. The overall strength of the material can be enhanced by the skeleton filler, and it has the function of skeleton support. When encountering high temperature and high heat, the flux softens and deforms, and then is in a molten state, which can absorb heat. The molten flux can connect the skeleton filler, so that the skeleton fillers are connected as a whole, which is beneficial to maintaining the support strength and stability of the skeleton filler. The flame retardant can improve the flame retardancy of the material, so that the tape with the acrylate oligomer is not easy to burn at high temperature and high heat, and the structure of the tape is not easy to deform or damage, thereby improving the performance of the tape. The tape with the acrylate oligomer is used in a battery to protect the battery from thermal runaway. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 It is a schematic diagram of the structure of the adhesive tape in one embodiment of the present invention;

[0059] Figure 2 It is a schematic diagram of the structure of an adhesive tape in another embodiment of the present invention;

[0060] Figure 3 It is a schematic diagram of the structure of an adhesive tape in another embodiment of the present invention;

[0061] Figure 4 It is a schematic diagram of the structure of an adhesive tape in another embodiment of the present invention;

[0062] Figure 5 A schematic structural diagram of an adhesive tape in one embodiment of the present invention;

[0063] Figure 6 A schematic structural diagram of an adhesive tape in one embodiment of the present invention;

[0064] Figure 7 This is a schematic diagram of thermal insulation performance test;

[0065] Figure 8 This is a schematic diagram of impact resistance test;

[0066] Fig. 9 A test diagram of the impact resistance of the tape;

[0067] Fig.10 Another test diagram of the impact resistance of the tape.

[0068] Reference numerals

[0069] Reinforcement layer 10 ; composition layer 20 ; adhesive layer 30 ; functional layer 40 . DETAILED DESCRIPTION

[0070] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not 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.

[0071] The ceramic fireproof and heat-insulating composition of the embodiment of the present invention comprises the following raw materials:

[0072] Acrylate oligomer: 15-45 parts by mass;

[0073] Active diluent: 5-25 parts by weight;

[0074] Skeleton filler: 5-25 parts by mass;

[0075] Flux: 15-40 parts by mass;

[0076] Flame retardant: 10 to 25 parts by mass; and

[0077] Photoinitiator: 0.4 to 2 parts by mass.

[0078] In the composition provided by the present invention, the acrylate oligomer is easy to be coated on the lining layer, the acrylate oligomer is easy to realize light curing, the skeleton filler can enhance the overall strength of the material and has the function of skeleton support, the flux softens and deforms when encountering high temperature and heat, and then is in a molten state, which can absorb heat, the molten flux can connect the skeleton filler, so that the skeleton fillers are connected as a whole, which is beneficial to maintain the support strength and stability of the skeleton filler, the flame retardant can improve the flame retardancy of the material, so that the adhesive tape with the acrylate oligomer is not easy to burn at high temperature and heat, and the structure of the adhesive tape is not easy to deform or damage, so the performance of the adhesive tape is improved, and the adhesive tape with the acrylate oligomer is used in a battery to protect the battery from thermal runaway.

[0079] The composition provided by the present invention uses ultraviolet-curable acrylate oligomers and monofunctional acrylate monomers as binder components, a solvent-free system, energy-saving and environmentally friendly, high production efficiency, and high flexibility, so that the tape containing the composition has excellent 3D conformability; the composition can be dispersed by simple physical mixing, is in a low-viscosity liquid state, and can form a thicker ceramic acrylate cured layer on the reinforcing layer by one-time coating and curing. When the composition and tape of the present invention encounter high-temperature combustion, the flux with a relatively low melting point in the composition will soften and deform, and then be in a molten state, which can absorb heat and connect with the skeleton filler and the decomposition products of organic matter, thereby forming a ceramic shell with a self-supporting structure, keeping the overall structure stable and not cracking, and blocking flames and heat. The flame retardant in the composition can further improve the flame retardancy of the material, reduce open flames and additional heat release, and enhance the thermal insulation performance of the fireproof and heat-insulating tape. Therefore, the tape with the composition can effectively protect batteries under different degrees of combustion from thermal runaway.

[0080] In some embodiments, the mass parts of the acrylate oligomer are 15 to 30; the mass parts of the reactive diluent are 5 to 20; and the mass parts of the flux are 20 to 35. For example, the mass parts of the acrylate oligomer are 30, the mass parts of the reactive diluent are 5, the mass parts of the skeleton filler are 25, the mass parts of the flux are 20, the mass parts of the flame retardant are 18, and the mass parts of the photoinitiator are 2. The specific contents of the acrylate oligomer, the reactive diluent, the skeleton filler, the flux, the flame retardant, and the photoinitiator can be selected according to actual conditions.

[0081] According to some embodiments, the acrylate oligomer may include at least one of aromatic acrylate, epoxy acrylate, polyester acrylate, and aliphatic polyurethane acrylate. For example, the acrylate oligomer may be aromatic acrylate, epoxy acrylate, polyester acrylate, or aliphatic polyurethane acrylate, and the acrylate oligomer may include epoxy acrylate and polyester acrylate. The specific type of the acrylate oligomer may be selected according to actual conditions.

[0082] Optionally, the functionality of the acrylate oligomer may be 2, and the viscosity of the acrylate oligomer may be 5000-50000 cps at a temperature of 60°C.

[0083] In some embodiments, the acrylate oligomer may be a mixture of an aliphatic polyurethane modified acrylate oligomer and 2(2-ethoxyethoxy)ethyl acrylate, wherein the content of 2(2-ethoxyethoxy)ethyl acrylate accounts for 10% of the mass of the mixture. For example, the acrylate oligomer may be an aliphatic polyurethane modified diacrylate oligomer, and the viscosity may be 21000-29000 mPa·s@60°C, with good boiling water resistance and flexibility.

[0084] Optionally, the reactive diluent may be a monofunctional acrylate monomer.

[0085] In some embodiments, the reactive diluent may include at least one of alicyclic acrylate, alkyl acrylate, and aromatic acrylate.

[0086] In an embodiment of the present invention, the skeleton filler may be an inorganic filler having a melting point greater than 1000°C. The skeleton filler is a silicate mineral material used to enhance the overall strength of the material and has a skeleton support function. The skeleton filler has a high melting point, which is greater than the melting point of the flux. The skeleton filler may have a melting point greater than 1000°C, is not easy to burn, and can still maintain support strength and stability under high temperature conditions.

[0087] Optionally, the skeleton filler may include at least one of kaolin, mica powder, talc, clay, montmorillonite, bentonite, wollastonite, surface-modified wollastonite, magnesium oxide, aluminum oxide, zirconium oxide, silicon dioxide, titanium dioxide, silicon carbide, mullite, feldspar, and attapulgite.

[0088] The diameter of the skeleton filler can be 5-40 um, and the specific type and content of the skeleton filler can be selected according to actual conditions. Optionally, the D90 of montmorillonite is less than 12 um, the D50 of wollastonite is less than 10 um, and the aspect ratio of wollastonite can be 3:1-5:1.

[0089] Optionally, the particle size of the skeleton filler may be 5-75 um.

[0090] Optionally, the skeleton filler may be wollastonite, the particle size may be 5-45 um, and the aspect ratio may be 12:1-20:1.

[0091] Optionally, the wollastonite may be surface-modified wollastonite, and the modifier may include at least one of stearic acid, titanate, aluminate, 3-(methacryloyloxy)propyltrimethoxysilane, and γ-(2,3-epoxypropoxy)propyltrimethoxysilane.

[0092] Optionally, the melting point of the skeleton filler is greater than the melting point of the flux. For example, the melting point of the skeleton filler may be greater than 1000°C, and the melting point of the flux may be 400-700°C. The skeleton filler has a higher melting point and can have better supporting strength under high temperature and heat, and is not easy to be damaged or deformed. The melting point of the flux is lower than the melting point of the skeleton filler so that the flux can connect to the skeleton filler after endothermic melting, so that the skeleton filler and the flux are connected into an integral structure, so that the tape can maintain structural stability under high temperature and heat.

[0093] The flux may include at least one of phosphate glass powder, borate glass powder, silicate glass powder, zinc borate, boron oxide, and zinc oxide. The particle size of the flux may be 5 to 40 um.

[0094] The flux can be a low-temperature melting inorganic filler, and can be selected from at least one of phosphate glass powder and borate glass powder. Since the softening point and melting temperature of the flux are relatively low, which can be 400-700°C, the flux softens and deforms when encountering high temperature and heat, and then is in a molten state. The molten flux can connect the skeleton filler, so that the tape can maintain the integrity of the structure under high temperature and heat and play a fireproof and heat-insulating effect.

[0095] Optionally, the particle size of the skeleton filler is larger than that of the flux, so that the flux can be dispersed or filled between the particles of the skeleton filler, and the flux can connect the skeleton filler after absorbing heat and melting, so that the skeleton filler and the flux are connected into an integral structure, so that the adhesive tape can maintain a stable structure under high temperature and high heat.

[0096] Optionally, the particle size of the skeleton filler can be 5-40um. If the particle size of the skeleton filler is too small, the supporting effect is poor. If the particle size of the skeleton filler is too large, it is not easy to be coated on the lining layer, and the particles are easy to protrude from the surface coating. Therefore, the particle size of the skeleton filler can be 5-40um.

[0097] The flame retardant can be an inorganic hydroxide or a phosphorus-containing substance, which can improve the flame retardancy of the material. The flame retardant can inhibit the release of additional heat caused by the combustion of the acrylate cured material itself, thereby further improving the thermal insulation performance of the fireproof and heat-insulating material and delaying the temperature rise rate of the protected substrate.

[0098] Optionally, the flame retardant includes at least one of aluminum hydroxide, magnesium hydroxide, type II ammonium polyphosphate, melamine polyphosphate, tricresyl phosphate, butyl triphenyl phosphate, tri(2-ethylhexyl) phosphate, 2-ethylhexyl diphenyl phosphate, isopropylated triphenyl phosphate and aryl phosphate oligomer.

[0099] In some embodiments, the flame retardant may include at least one of aluminum hydroxide, magnesium hydroxide, antimony trioxide, tricresyl phosphate, and isopropylated triphenyl phosphate. For example, the flame retardant may be aluminum hydroxide, magnesium hydroxide, or tricresyl phosphate, and the flame retardant may include aluminum hydroxide and isopropylated triphenyl phosphate. The specific type and content of the flame retardant may be selected according to actual conditions. The D90 of the flame retardant may be 80-120um, for example, the D90 of the flame retardant may be 105um.

[0100] Optionally, the fireproof and heat-insulating composition may further include: a heat-insulating filler, and the mass parts of the heat-insulating filler may be 1-6. For example, the mass parts of the heat-insulating filler may be 1, 3 or 6, and the specific content may be adjusted according to actual needs.

[0101] In some embodiments, the heat-insulating functional filler may be hollow microspheres, and the hollow microspheres may include at least one of hollow microspheres made of ceramic, glass, titanium dioxide, zirconium oxide, silicon dioxide, phenolic resin, and styrene.

[0102] Optionally, the average particle size of the heat-insulating functional filler may be 1-300 um, and the compressive strength may be greater than 5 MPa. For example, the average particle size of the heat-insulating functional filler may be 300 um, and the compressive strength may be 5.5 MPa.

[0103] Optionally, the fireproof and heat-insulating composition may further include: reinforcing fibers, and the weight of the reinforcing fibers may be 1-5. If the weight of the reinforcing fibers is too small, it is not easy to be interwoven into a mesh structure, which is not conducive to enhancing the strength and integrity of the composition. If the weight of the reinforcing fibers is too large, it is not easy to be dispersed in the composition. Therefore, the weight of the reinforcing fibers may be 1-5. The reinforcing fibers may include at least one of glass fibers, carbon fibers, and alumina fibers. The reinforcing fibers may be interwoven into a mesh structure in the composition, and the reinforcing fibers may enhance the strength and integrity of the composition, which is conducive to maintaining the stability of the structure.

[0104] Optionally, the reinforcing fibers may include at least one of chopped fibers and loose fibers, the chopped fibers may be made of at least one of glass, silica, alumina, zirconium oxide, and titanium dioxide, and the loose fibers may be made of at least one of alkaline earth silicate fibers and aluminum silicate fibers. For example, the chopped fibers may be made of alumina, and the loose fibers may be made of aluminum silicate fibers.

[0105] Optionally, the length of the reinforcing fiber may be 1-5 mm, for example, the length of the reinforcing fiber may be 1 mm, 3 mm or 5 mm.

[0106] Optionally, the diameter of the reinforcing fiber can be 5-15um, for example, the diameter of the reinforcing fiber can be 5um, 10um or 15um. The reinforcing fiber can be glass fiber or ceramic fiber, the length of the reinforcing fiber can be 3mm, the diameter of the reinforcing fiber can be 10um, the length of the reinforcing fiber can be 5mm, the diameter of the reinforcing fiber can be 15um, and the length and diameter of the reinforcing fiber can be selected according to actual conditions.

[0107] Optionally, the mass fraction of the photoinitiator can be 0.4-2. The photoinitiator facilitates the curing of the acrylic ester compound under ultraviolet light, thereby improving the curing efficiency. The non-solvent curing method is environmentally friendly and has high curing efficiency.

[0108] Optionally, the composition may further include: a dispersant, the mass fraction of which may be 0-3. The dispersant facilitates the dispersion of the components in the composition, improves the dispersion effect and compatibility, and allows the composition to be mixed uniformly.

[0109] An embodiment of the present invention provides an adhesive tape, the adhesive tape comprising:

[0110] a). Enhancement layer 10;

[0111] b). A composition layer 20. A composition layer 20 is disposed on at least one side of the reinforcing layer 10. The composition layer 20 includes the composition in the above-mentioned embodiment.

[0112] For example, Figure 1 As shown in , one side of the reinforcement layer 10 may be provided with a composition layer 20; both sides of the reinforcement layer 10 may be provided with a composition layer 20, and the specific thickness of the reinforcement layer 10 and the composition layer 20 may be selected according to actual conditions. The adhesive tape having the composition is not easy to burn at high temperature and heat, so that the structure of the adhesive tape is not easy to deform or damage, and the performance of the adhesive tape is improved. The adhesive tape having the composition is used in a battery to protect the battery from thermal runaway.

[0113] In some embodiments, the reinforcing layer can be selected from at least one of a fiber fabric layer, mica paper, and high-silica cloth. For example, the reinforcing layer can be a fiber fabric layer, mica paper, or high-silica cloth, the reinforcing layer can be a fiber fabric layer and mica paper stacked, or the reinforcing layer can be a fiber fabric layer and high-silica cloth stacked. For example, the thickness of the reinforcing layer can be 0.1-2mm, the reinforcing layer can be a fiber fabric layer, the thickness of the fiber fabric layer can be 0.2mm, the reinforcing layer can be high-silica cloth, the thickness of the high-silica cloth can be 0.2mm-1.3mm, for example, the thickness of the high-silica cloth can be 1mm, and the specific thickness of the reinforcing layer can be selected according to actual conditions. The reinforcing layer can be mica paper, the thickness of the mica paper can be 0.1-0.2mm, for example, the thickness of the mica paper can be 0.15mm.

[0114] Optionally, the fiber fabric layer can be selected from at least one of glass fiber, basalt fiber, ceramic fiber, silicate fiber, and high silica fiber. The fiber fabric layer can be a glass fiber layer, and the diameter or pore size of the fiber in the fiber fabric layer can be selected according to actual conditions.

[0115] Alternatively, if Figure 2 As shown, the adhesive tape may further include: an adhesive layer 30, which is disposed on a side of the reinforcing layer 10 away from the composition layer 20. The reinforcing layer 10 may be a fiber fabric layer or a high-silica cloth.

[0116] A release film may be provided on the side of the adhesive layer 30 away from the reinforcing layer 10 , and the adhesive layer may be protected by the release film. The adhesive layer may be removed when in use, and the tape may be bonded to the surface to be bonded through the adhesive layer.

[0117] Alternatively, if Figure 5 As shown, the adhesive layer 30 can be disposed on the side of the composite layer 20 away from the reinforcement layer 10. The reinforcement layer 10 can be a fiber fabric layer or a high-silica cloth, and the adhesive layer 30 can be disposed on the side of the composite layer 20 away from the reinforcement layer 10.

[0118] Alternatively, if Figure 6 As shown, the adhesive layer 30 can be disposed on the side of the reinforcing layer 10 away from the composition layer 20, and at the same time, the adhesive layer 30 can be disposed on the side of the composition layer 20 away from the reinforcing layer 10. For example, the adhesive tape can include a reinforcing layer 10 and a composition layer 20, the reinforcing layer 10 and the composition layer 20 are stacked, and the adhesive layer 30 can be disposed on both the side of the reinforcing layer 10 away from the composition layer 20 and the side of the composition layer 20 away from the reinforcing layer 10.

[0119] In some embodiments, Figure 3 As shown, the adhesive tape may also include: an adhesive layer 30 and a functional layer 40. The side of the reinforcement layer 10 away from the composition layer 20 may be provided with an adhesive layer 30, and the side of the composition layer 20 away from the reinforcement layer 10 may be provided with an adhesive layer 30. The side of the adhesive layer 30 away from the reinforcement layer 10 may be provided with a functional layer 40, and the functional layer 40 may include at least one of an insulating layer, a heat insulating layer, and a reinforcing layer. The insulating layer may have an insulating effect to improve the insulating effect of the adhesive tape, the heat insulating layer may have a heat insulating effect, and the reinforcing layer may have a reinforcing effect, which is beneficial to enhancing the strength of the adhesive tape. The functional layer may be mica paper or high silica cloth, and the mica paper may have an insulating effect. When the adhesive tape encounters high heat or open flame, the mica paper can block the high heat or open flame, and delay the time when other layers in the adhesive tape are exposed to high heat or open flame.

[0120] Optionally, the functional layer may include at least one of mica paper, alkaline earth silicate fiber paper, fiber braid, and aerogel foam.

[0121] Optionally, the thickness of the functional layer is 0.1-1.0 mm.

[0122] Optionally, the thickness of the adhesive layer can be 25-100 um. Too small a thickness of the adhesive layer is not conducive to improving the bonding effect, while too large a thickness of the adhesive layer is not conducive to thinning the tape. Therefore, the thickness of the adhesive layer can be selected to be 25-100 um.

[0123] Optionally, the adhesive layer may be a flame retardant layer.

[0124] Optionally, the thickness of the reinforcement layer may be 0.1 to 1.3 mm. The reinforcement layer may be a fiber fabric layer, the thickness of the fiber fabric layer may be 0.5 mm; the reinforcement layer may be a high-silica cloth, the thickness of the high-silica cloth may be 0.7 mm, and the specific thickness of the reinforcement layer may be selected according to actual conditions.

[0125] Optionally, the thickness of the composition layer may be 0.1 to 3.0 mm. For example, the thickness of the composition layer may be 0.1 mm, 1 mm, 2 mm or 3.0 mm, and the specific thickness may be selected according to actual conditions. Too small a thickness of the composition layer is not conducive to improving the flame retardant effect, nor is it conducive to achieving a good supporting strength effect, and too large a thickness of the adhesive layer is not conducive to thinning the tape. Therefore, the thickness of the composition layer may be selected to be 0.1 to 3.0 mm.

[0126] Optionally, the thickness of the adhesive tape may be 0.2 to 3 mm. For example, the thickness of the adhesive tape may be 0.2 mm, 1.5 mm or 3 mm. The thickness of the adhesive tape may be selected according to actual needs.

[0127] An embodiment of the present invention provides a method for preparing an adhesive tape, comprising:

[0128] 1) Mixing and dispersing the raw materials in the composition described in the above embodiment to obtain a ceramic fireproof and heat-insulating composition slurry;

[0129] 2) coating the ceramic fireproof and heat-insulating composition slurry on the surface of the reinforcement layer and curing it to obtain the tape substrate;

[0130] 3) directly applying a pressure-sensitive adhesive to the side of the reinforcing layer away from the composition layer and / or the side of the composition layer away from the reinforcing layer; or

[0131] The adhesive tape is obtained by laminating a pressure-sensitive adhesive film to a side of the reinforcing layer away from the composition layer and / or a side of the composition layer away from the reinforcing layer.

[0132] The adhesive tape in the above embodiment can be prepared by the above method, so that the adhesive tape having the composition is not easy to burn at high temperature and high heat, and the structure of the adhesive tape is not easy to deform or damage, thereby improving the performance of the adhesive tape. The adhesive tape having the composition can be used in a battery to protect the battery from thermal runaway.

[0133] In some embodiments, the reinforcing layer may include at least one of a fiber fabric layer, mica paper, and high silica cloth. For example, the reinforcing layer may be a fiber fabric layer, and the composition is mixed to obtain a mixed slurry, which is easy to coat on the reinforcing layer, and the mixed slurry is not easy to penetrate into the fabric layer, and is easy to achieve light curing.

[0134] The adhesive tape described in the above embodiment is used for fire protection and heat insulation in thermal runaway of battery components. The adhesive tape in the above embodiment is not easy to burn at high temperature and heat, and the structure of the adhesive tape is not easy to deform or damage. The adhesive tape can be used in the battery to protect the battery from thermal runaway.

[0135] In some embodiments, the acrylate oligomer includes: at least one of aromatic acrylate, epoxy acrylate, polyester acrylate, and aliphatic polyurethane acrylate, the acrylate oligomer has a functionality of 2, and a viscosity of 100-40000cps (60°C), and this viscosity range makes it easy to coat the acrylate oligomer on the reinforcement layer, and the acrylate oligomer can be cured by photoinitiation; preferably, the acrylate oligomer has a high curing rate and excellent flexibility.

[0136] The skeleton filler is mainly a silicate mineral material. In some embodiments, the skeleton filler may include at least one of kaolin, mica powder, talc, clay, montmorillonite, bentonite, wollastonite, magnesium oxide, aluminum oxide, zirconium oxide, silicon dioxide, titanium dioxide, silicon carbide, mullite, feldspar, and attapulgite. The particle size of the skeleton filler may be 5-75um. Preferably, the skeleton filler is wollastonite with a particle size of 5-45um and an aspect ratio of 12:1-20:1. Its main components are: SiO 2 ≥50%, CaO≥42%, MgO≤2.5%, Al 2 O 3 ≤1%. More preferably, the wollastonite is surface-modified wollastonite to improve the poor dispersibility and compatibility of the inorganic skeleton filler and the organic resin matrix during mixing, thereby affecting the overall ceramic properties of the ceramic polymer. The modifier includes at least one of stearic acid, titanate, aluminate, 3-(methacryloyloxy)propyltrimethoxysilane, and γ-(2,3-epoxypropoxy)propyltrimethoxysilane.

[0137] At high temperatures, mineral fillers can be sintered to form a ceramic shell with a self-supporting structure, but when the sintering temperature is low (500-800°C), the strength and size retention of the ceramic shell are not ideal. The flux can reduce the melting temperature of the ceramic phase, so that the polymer ceramicization process can be carried out at a relatively lower temperature. Fluxes such as phosphate glass powder and borate glass powder can react with ceramic skeleton fillers at a relatively low sintering temperature to form a self-supporting structure, with a faster ceramic formation rate, thereby achieving protection against high temperature and high pressure impact during thermal runaway of high energy density lithium batteries. The flux used in the present invention includes: at least one of phosphate glass powder, borate glass powder, zinc borate, and boron oxide. The flux particle size is 5 to 40um. Preferably, the flux is lead-free glass powder of different materials such as phosphate glass and borate glass. Its composition and melting range are listed in Table 1 and Table 2, respectively.

[0138] Table 1. Composition of low melting point glass flux

[0139] Chemical composition Phosphate glass powder Borate glass powder <![CDATA[SiO 2 ,%]]> 1～3 17～25 <![CDATA[Al 2 THE 3 ,%]]> 19～25 6～10 <![CDATA[B 2 THE 3 ,%]]> 7～8 17～25 <![CDATA[K 2 Oh,%]]> 12～15 2～5 <![CDATA[Na 2 Oh,%]]> 10～15 10～15 BaO,% 2～5 / <![CDATA[P 2 THE 5 ,%]]> 35～39 / CaO,% / 1～3 MgO,% / 2～5 ZnO, % / 20～25

[0140] Table 2. Melting range of low melting point glass flux

[0141] Chemical composition Phosphate glass powder Borate glass powder Softening point temperature / ℃ ～390 ～440 Initial melting temperature / ℃ ～440 ～510 Complete melting temperature / ℃ ～460 ～550 Melt flow temperature / ℃ ～490 ～590

[0142] In some embodiments, the flame retardant is an inorganic hydroxide or a phosphorus-containing substance, including at least one of aluminum hydroxide, magnesium hydroxide, type II ammonium polyphosphate, melamine polyphosphate, tricresyl phosphate, butyl triphenyl phosphate, tri(2-ethylhexyl) phosphate, 2-ethylhexyl diphenyl phosphate and isopropylated triphenyl phosphate, and aromatic phosphate oligomers.

[0143] In some embodiments, the photoinitiator is a photosensitive free radical initiator, including at least one of benzoin and its derivatives, acetophenone derivatives, aromatic ketone compounds and acylphosphine oxides.

[0144] The present invention provides a variety of tape structures to meet the fire protection requirements under different conditions, including but not limited to Figures 1 to 6 The structure shown.

[0145] In some embodiments, at least one side of the reinforcing layer 10 is provided with a composition layer 20. The reinforcing layer 10 includes at least one of a fiber fabric layer and mica paper. The thickness of the reinforcing layer 10 may be 0.1-1.3 mm. The adhesive layer 30 is disposed on at least one side of the composition layer or on the side of the reinforcing layer away from the composition layer. In order to further enhance the fireproof and heat-insulating effect, in some embodiments, a functional layer 40 is disposed on the other side of the adhesive layer. The functional layer may include at least one of an insulating layer, a heat-insulating layer, and a reinforcing layer. The insulating layer may have an insulating effect to improve the insulating effect of the tape, the heat-insulating layer may have a heat-insulating effect, and the reinforcing layer may have a reinforcing effect, which is beneficial to enhancing the strength of the tape. The functional layer may be mica paper or high-silica cloth, and the mica paper may have an insulating effect. When the tape encounters high heat or open flame, the mica paper may block the high heat or open flame, and delay the time when other layers in the tape contact high heat or open flame.

[0146] The present invention is further described below through some specific embodiments.

[0147] Implementation

[0148] Table 3. List of raw materials

[0149]

[0150]

[0151] Test Method

[0152] (1) Thermal insulation performance test

[0153] The combustion test apparatus can be Figure 7 As shown. 0.8mm thick steel plate A with KTL coating is used to simulate the battery pack of the car. The tape sample B (size 220×220mm) is laminated on the steel plate A, using butane gas as fuel, the burner power is 1.85kW, and the butane gas fire is burned for 10 minutes at above 1200℃ to simulate the thermal insulation performance of the material under thermal runaway. During this period, the temperature of the cold side and the hot side (the temperature of the side of the tape away from the flame is the "cold side") are monitored respectively by a K-type thermocouple or a B-type thermocouple. The lower the cold test temperature, the better the thermal insulation performance.

[0154] (2) Impact resistance test

[0155] like Figure 8As shown in the figure, the impact resistance of the tape was tested by simulating the impact of hot metal particles on high-energy batteries of electric vehicles under thermal runaway conditions. A high-pressure spray gun was used to provide 22 seconds of hot particle impact. The diameter of the spray gun was 22 mm, the temperature of the heating flame was 1300±100℃, and the heating power was 9±1kW. The tape C (size: 150×150mm) was superimposed on a 2mm thick aluminum plate D. The aluminum plate D was placed vertically, and the tape C faced the spray gun. The time the tape was subjected to the flame impact was recorded in seconds, that is, the time required for the aluminum plate D to be burned through. The longer the time, the stronger the impact resistance of the tape.

[0156] (3) Insulation test

[0157] Test the breakdown voltage of the tape sample according to IEC60243-1 standard. The higher the breakdown voltage, the better the insulation of the tape.

[0158] Examples 1-12

[0159] Preparation of ceramic fireproof and heat-insulating composition

[0160] The acrylate oligomer, active diluent and photoinitiator are placed in a reactor with a vacuum degassing and temperature control system according to the amounts shown in Table 4, and mixed at a speed of 400 to 700 rpm for 5 to 10 minutes. At a speed of 400 to 400 rpm, the flux, wollastonite and aluminum hydroxide are sequentially added to the slurry, the dispersion speed is adjusted to 2000 to 2200 rpm, the circulating cooling device is turned on to keep the material temperature between 40 and 55°C, and the dispersion is carried out for 30 to 40 minutes. The speed is adjusted to 300 to 500 rpm, and the vacuum system is turned on for 40 to 60 minutes to remove the bubbles in the slurry to obtain a ceramic fireproof and heat-insulating composition.

[0161] Preparation of ceramic fireproof and heat-insulating tape

[0162] The composite mixture was coated on a 0.2 mm thick glass fiber cloth, and a layer of release paper was covered on the upper surface of the composite layer to isolate the air. The composite layer was passed through a double-roll laminating machine with a set spacing at a certain speed to achieve the corresponding designed thickness of 2.0 mm. Then, a 365 nm LED light was used to irradiate the laminated film (12 mW / cm 2 , 60 seconds), after curing Figure 1 Tape substrate of the structure shown.

[0163] The pressure-sensitive adhesive film tesa 58335 with release paper was pressed onto the side of the reinforcement layer away from the composition layer to obtain the following Figure 2 The fireproof heat-insulating tape of the structure shown in the figure was subjected to corresponding performance tests according to the above test methods, and the test results are shown in Table 5, wherein when conducting the heat insulation and impact resistance performance tests, the composite layer is the side directly facing the flame and the impact.

[0164] Examples 13-15

[0165] The acrylate oligomer, active diluent, photoinitiator and flame retardant are placed in a reaction kettle with a vacuum degassing and temperature control system according to the dosage shown in Table 4, and mixed at a speed of 400-700 rpm for 5-10 minutes. At a speed of 400-400 rpm, the flux, wollastonite and aluminum hydroxide are added to the slurry in sequence, the dispersion speed is adjusted to 2000-2200 rpm, the circulating cooling device is turned on, the material temperature is maintained between 40-55°C, and the dispersion is carried out for 30-40 minutes. At a speed of 400-400 rpm, the heat insulation functional filler is added to the kettle as shown in Table 4, the speed is adjusted to 500-700 rpm, after mixing for 10-15 minutes, the speed is adjusted to 300 rpm, and the vacuum system is turned on for 40-60 minutes to remove the bubbles in the slurry to obtain a ceramic fireproof and heat-insulating composition.

[0166] The preparation method of the adhesive tape is the same as that described in Examples 1-12, and the corresponding fireproof and heat-insulating adhesive tape is as follows: Figure 2 The corresponding performance tests were carried out according to the above test methods, and the test results are shown in Table 5, wherein when the heat insulation and impact resistance tests were carried out, the composite layer was the side directly facing the flame and the impact.

[0167] Examples 16-22

[0168] The acrylate oligomer, active diluent, photoinitiator and flame retardant are placed in a reactor with a vacuum degassing and temperature control system according to the amounts shown in Table 4, and mixed at a speed of 400 to 700 rpm for 5 to 10 minutes. At a speed of 400 to 400 rpm, flux, wollastonite and aluminum hydroxide are added to the slurry in sequence, and the dispersion speed is adjusted to 2000 to 2200 rpm. The circulating cooling device is turned on to keep the material temperature between 40 and 55°C, and the dispersion is carried out for 30 to 40 minutes. At a speed of 400 to 500 rpm, reinforcing fibers are added to the kettle in the amount shown in Table 4, and the speed is adjusted to 800 to 1000 rpm. After dispersion for 10-15 minutes, a heat insulating functional filler is added to the kettle at a speed of 400 to 500 rpm. The speed is adjusted to 500 to 700 rpm. After mixing for 10-15 minutes, the speed is adjusted to 300 rpm, and the vacuum system is turned on for 40 to 60 minutes to remove bubbles in the slurry to obtain a ceramicizable fireproof and heat-insulating composition.

[0169] The preparation method of the adhesive tape is the same as that described in Examples 1-12, and the corresponding fireproof and heat-insulating adhesive tape is as follows: Figure 2 The corresponding performance tests were carried out according to the above test methods, and the test results are shown in Table 5, wherein when the heat insulation and impact resistance tests were carried out, the composite layer was the side directly facing the flame and the impact.

[0170] Embodiment 23

[0171] The 2.0 mm thick ceramic fireproof and heat-insulating tape substrate prepared in Example 13 was used, and the sensitive adhesive film tesa58334 with release paper on one side was respectively attached to both sides of the tape substrate by a lamination process, and the adhesive layer with release paper on one side of the composition was peeled off, and the 0.17 mm thick mica paper was again laminated by a lamination process. S140GF46 is laminated on the adhesive layer on one side of the composition layer to obtain a performance-enhanced ceramic fireproof and heat-insulating tape, such as Figure 3 The obtained tape was tested for mechanical properties and fireproof and heat-insulating properties according to the above test methods. The test results are shown in Table 5. When performing the heat insulation and impact resistance tests, the mica layer was on the side directly facing the flame and impact.

[0172] Embodiment 24

[0173] The composition of Example 13 was directly coated on a 0.17 mm thick mica paper, and the following was prepared according to the curing method and tape preparation method described in Examples 1-12: Figure 2 The ceramic fireproof heat-insulating tape of the structure is different in that the reinforcing layer in this embodiment is mica paper. When performing the heat insulation and impact resistance tests, the composite layer is the side directly facing the flame and the impact.

[0174] Embodiment 25

[0175] The composition of Example 13 was directly coated on a 0.6 mm thick high-silica cloth, and the following curing method and tape preparation method were used to prepare the following adhesive tape: Figure 2 The ceramic fireproof heat-insulating tape of the structure is different in that the reinforcing layer in this embodiment is a high-silica fiber cloth. When performing heat insulation and impact resistance tests, the composite layer is the side directly facing the flame and impact.

[0176] Embodiment 26

[0177] The composition of Example 13 was directly coated on a 1.0 mm thick high-silicon cloth, and the following curing method and tape preparation method were used to prepare the following adhesive tape: Figure 2 The ceramic fireproof heat-insulating tape of the structure is different in that the reinforcing layer in this embodiment is a high-silica fiber cloth. When performing heat insulation and impact resistance tests, the composite layer is the side directly facing the flame and impact.

[0178] Comparative Examples 1-3

[0179] According to the components and weight parts listed in Comparative Examples 1-3 in Table 4, the compositions and adhesive tape preparation methods described in Examples 13-15 were prepared. Figure 2 For the ceramicizable fireproof and heat-insulating tape shown in the structure, when conducting the heat insulation and impact resistance tests, the composite layer is the side directly facing the flame and the impact.

[0180] Comparative Example 4

[0181] The composition of Example 13 was used to prepare the following adhesive tape according to the curing method and adhesive tape preparation method described in Examples 1-12. Figure 4 The ceramicizable fireproof and heat-insulating tape has a structural difference in that there is no reinforcement layer in this embodiment.

[0182] Comparative Example 5

[0183] The difference between Comparative Example 5 and the above embodiment is that the acrylic ester oligomer in the main component is replaced with common silicone rubber, and the components are 100 parts by mass of silicone rubber raw rubber, 50 parts by mass of fumed silica, 5 parts by mass of hydroxy silicone oil, 30 parts by mass of mica powder, 15 parts by mass of aluminum hydroxide, 10 parts by mass of low-melting point glass powder, and 1 part of cross-linking agent.

[0184] Preparation of ceramic silicone rubber

[0185] First, dry the powder in a vacuum drying oven at 105°C for 2 hours. Adjust the double-roll opening to 2-3mm, add, and after it is rolled, add white carbon black and hydroxy silicone oil to the silicone rubber, mix well, then add mica powder, aluminum hydroxide and low-melting glass powder, and finally add cross-linking agent. Adjust the roller distance to 1mm, pass it through 5 times, then adjust it to 2mm, and take out the sheet. After the rubber is placed for 12 hours, it is reversed. Use an electric hot plate vulcanizer to press the rubber on a 0.2mm glass fiber cloth and vulcanize it.

[0186] The tape preparation method is as follows Figure 2 The 2.0 mm thick glass fiber reinforced fireproof tape shown in the structure. The obtained tape was tested for mechanical properties and fireproof and heat insulation properties according to the above test methods. The test results are shown in Table 5. When performing the heat insulation and impact resistance tests, the silicone rubber layer is the side directly facing the flame and impact.

[0187] Table 4 Components and mass contents of ceramic fireproof and heat-insulating compositions

[0188]

[0189] Table 4 continued

[0190]

[0191] Table 4 continued

[0192]

[0193] Table 5 Performance test results of adhesive tapes in embodiments and comparative examples

[0194]

[0195]

[0196] According to Implementation Options 1 to Implementation Options 26, as shown in Table 5, the ceramicizable fireproof and thermal insulation tapes prepared by using UV-curable acrylates modified by ceramicized powders all have excellent impact resistance, thermal insulation, sintering insulation, and crack resistance.

[0197] In Comparative Examples 1 to 5, the prepared adhesive tapes cannot simultaneously meet the performance requirements of the present invention.

[0198] In Comparative Example 1, 50 parts by mass of acrylate oligomer and 10 parts by mass of acrylate monomer were used as film-forming materials for the tape substrate, and the ceramic filler accounted for about 40 parts by mass. Although a certain amount of ceramic filler was added, the excessive amount of organic film-forming materials caused the ceramic strength of the tape in Comparative Example 1 to be weak. At the same time, due to the large proportion of organic matter, when the flame continues to burn, its own combustion will also release more heat, resulting in a higher temperature on the cold side.

[0199] In Comparative Example 2, the skeleton filler component is missing, and the ceramic shell formed by the prepared tape is brittle and weak, and has relatively weak impact resistance.

[0200] Comparative Example 3 lacks the flux component. Due to the lack of the constraint of the molten glass phase formed at high temperature by the flux, the tape will form a dense porous carbon layer structure, and thus the thermal insulation will be relatively better. However, the prepared tape cannot be sintered to produce a ceramic shell, and only the residual carbon layer structure remains. Therefore, the impact resistance is greatly weakened, and the sintered insulation is also relatively poor.

[0201] The adhesive tape in Comparative Example 4 lacks stress constraint of the reinforcement layer and is easily deformed and cracked at high temperatures. The strength of the ceramic shell is reduced, the impact resistance is weakened, and the sintered insulation is also poor.

[0202] Comparative Example 5 is a ceramic solution with relatively more mature technology. Ceramic silicone rubber has the advantages of low heat release rate and slow combustion rate. At the same time, the silicon dioxide produced by decomposition can also be used as a ceramic filler to further improve the strength of the ceramic shell. However, ceramic silicone rubber is prone to cracking when burned at high temperature, and even produces through cracks, which does not meet the comprehensive performance of fireproofing, heat insulation and crack resistance. Fig. 9 and Fig.10 shown.

[0203] In addition, it can be seen from the results of Example 9, Example 13 and Example 15 that the addition of thermal insulation functional fillers can improve the sintering insulation of the tape, especially the ceramic hollow glass microspheres have better insulation improvement performance, mainly because the ceramic hollow glass microspheres have a higher melting point, generally higher than 1300°C, therefore, under the high temperature burning test conditions of 1200°C, the microspheres can maintain better integrity.

[0204] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A ceramic fireproof and heat-insulating composition, It is characterized in that Its raw materials include the following components: Acrylate oligomer: 15-45 parts by mass; Active diluent: 5-25 parts by weight; Skeleton filler: 5-25 parts by mass; Flux: 15-40 parts by mass; Flame retardant: 10 to 25 parts by mass; and Photoinitiator: 0.4 to 2 parts by mass.

2. The fireproof and heat-insulating composition according to claim 1, It is characterized in that The mass parts of the acrylic ester oligomer are 15 to 30; the mass parts of the active diluent are 5 to 20; and the mass parts of the flux are 20 to 35.

3. The fireproof and heat-insulating composition according to claim 1 or 2, It is characterized in that The acrylate oligomer includes at least one of aromatic acrylate, epoxy acrylate, polyester acrylate and aliphatic polyurethane acrylate.

4. The fireproof and heat-insulating composition according to claim 1, It is characterized in that The functionality of the acrylate oligomer is 2, and the viscosity of the acrylate oligomer is 5000-50000 cps at a temperature of 60°C.

5. The fireproof and heat-insulating composition according to claim 1, It is characterized in that The active diluent is a monofunctional acrylate monomer.

6. The fireproof and heat-insulating composition according to claim 1 or 5, It is characterized in that The reactive diluent includes at least one of alicyclic acrylate, alkyl acrylate and aromatic acrylate.

7. The fireproof and heat-insulating composition according to claim 1, It is characterized in that The skeleton filler is an inorganic filler with a melting point greater than 1000°C.

8. The fireproof and heat-insulating composition according to claim 1, It is characterized in that The skeleton filler includes at least one of kaolin, mica powder, talc, clay, montmorillonite, bentonite, wollastonite, surface-modified wollastonite, magnesium oxide, aluminum oxide, zirconium oxide, silicon dioxide, titanium dioxide, silicon carbide, mullite, feldspar, and attapulgite; and / or The particle size of the skeleton filler is 5-75um.

9. The fireproof and heat-insulating composition according to claim 1, It is characterized in that The skeleton filler is wollastonite with a particle size of 5-45um and an aspect ratio of 12:1-20:

1.

10. The fireproof and heat-insulating composition according to claim 9, It is characterized in that The wollastonite is surface-modified wollastonite, and the modifier comprises at least one of stearic acid, titanate, aluminate, 3-(methacryloyloxy)propyltrimethoxysilane, and γ-(2,3-epoxypropoxy)propyltrimethoxysilane.

11. The fireproof and heat-insulating composition according to claim 1, It is characterized in that The flux comprises at least one of phosphate glass powder, borate glass powder, silicate glass powder, zinc borate, boron oxide, and zinc oxide; and / or The flux softening point is 400-700°C; and / or The flux particle size is 5-40 um.

12. The fireproof and heat-insulating composition according to claim 1, It is characterized in that The flame retardant includes at least one of aluminum hydroxide, magnesium hydroxide, type II ammonium polyphosphate, melamine polyphosphate, tricresyl phosphate, butyl triphenyl phosphate, tri(2-ethylhexyl) phosphate, 2-ethylhexyl diphenyl phosphate, isopropylated triphenyl phosphate and aryl phosphate oligomer.

13. The fireproof and heat-insulating composition according to claim 1, It is characterized in that Also includes: The heat-insulating functional filler has a mass fraction of 1-6.

14. The fireproof and heat-insulating composition according to claim 13, It is characterized in that The heat-insulating functional filler is hollow microspheres, and the hollow microspheres include at least one of hollow microspheres made of ceramic, glass, titanium dioxide, zirconium oxide, silicon dioxide, phenolic resin, and styrene; and / or The average particle size of the heat-insulating functional filler is 1-300 um, and the compressive strength is greater than 5 MPa.

15. The fireproof and heat-insulating composition according to claim 1, It is characterized in that Also includes: The reinforcing fiber has a mass fraction of 1-5.

16. The fireproof and heat-insulating composition according to claim 15, It is characterized in that The reinforcing fibers include at least one of chopped fibers and loose fibers, wherein the chopped fibers are made of at least one of glass, silica, alumina, zirconia, and titanium dioxide; and the loose fibers are made of at least one of alkaline earth silicate fibers and aluminum silicate fibers; and / or The length of the reinforcing fibers is 1-5 mm; and / or The diameter of the reinforcing fiber is 5-15um.

17. An adhesive tape, It is characterized in that include: a). Enhancement layer; b) A composition layer, wherein at least one side of the reinforcement layer is provided with a composition layer, and the composition layer comprises the composition according to any one of claims 1 to 16.

18. The adhesive tape according to claim 17, It is characterized in that The reinforcing layer is selected from at least one of a fiber fabric layer, mica paper, and high-silica cloth.

19. The adhesive tape according to claim 18, It is characterized in that The fiber fabric layer is selected from at least one of glass fiber, basalt fiber, ceramic fiber, silicate fiber and high silica fiber.

20. The adhesive tape according to claim 17, It is characterized in that Also includes: An adhesive layer, the adhesive layer being disposed on a side of the reinforcing layer away from the composite layer; and / or The adhesive layer is arranged on a side of the composition layer away from the reinforcement layer.

21. The adhesive tape according to claim 17, It is characterized in that Also includes: An adhesive layer, wherein the adhesive layer is disposed on a side of the reinforcing layer away from the composite layer, and the adhesive layer is disposed on a side of the composite layer away from the reinforcing layer; A functional layer is provided on a side of the adhesive layer away from the reinforcement layer, and the functional layer includes at least one of an insulating layer, a heat-insulating layer, and a reinforcing layer.

22. The adhesive tape according to claim 21, It is characterized in that The functional layer comprises at least one of mica paper, alkaline earth silicate fiber paper, fiber braid, and aerogel foam; and / or The thickness of the functional layer is 0.1-1.0 mm.

23. The adhesive tape according to any one of claims 20 to 22, It is characterized in that The thickness of the adhesive layer is 25 to 100 um; and / or The adhesive layer is a flame retardant layer.

24. The adhesive tape according to claim 17, It is characterized in that The thickness of the reinforcement layer is 0.1 to 1.3 mm; and / or The thickness of the composition layer is 0.1 to 3.0 mm; and / or The thickness of the adhesive tape is 0.2-3 mm.

25. A method for preparing an adhesive tape, It is characterized in that include: 1) mixing and dispersing the raw materials in the composition according to any one of claims 1 to 16 to obtain a ceramic fireproof and heat-insulating composition slurry; 2) coating the ceramic fireproof and heat-insulating composition slurry on the surface of the reinforcement layer and curing it to obtain the tape substrate; 3) directly applying a pressure-sensitive adhesive to the side of the reinforcing layer away from the composition layer and / or the side of the composition layer away from the reinforcing layer; or The adhesive tape is obtained by laminating a pressure-sensitive adhesive film to a side of the reinforcing layer away from the composition layer and / or a side of the composition layer away from the reinforcing layer.

26. Use of the adhesive tape according to any one of claims 17 to 24 for fire prevention and heat insulation in thermal runaway of battery components.

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