Ceramizable composition with fire prevention and heat insulation, adhesive tape, preparation method and application

Abstract

Disclosed in the present invention are a ceramizable composition with fire prevention and heat insulation, an adhesive tape, a preparation method therefor and an application thereof. The composition comprises: 15-45 parts by mass of an acrylate oligomer; 5-25 parts by mass of an active diluent; 5-25 parts by mass of a skeleton filler; 15-40 parts by mass of a flux; 10-25 parts by mass of a flame retardant; and 0.4-2 parts by mass of a photo-initiator. The composition of the present invention and adhesive tapes of various structures containing the composition have excellent mechanical performance in normal states, and can be sintered to form a ceramized shell protective layer with high strength in the event of a fire, which has highly efficient fire prevention and heat insulation effects, and also has excellent anti-cracking performance, so that fire protection requirements under fires of different degrees can be met.

Description

[0001] tesa Societas Europaea Norderstedt

[0002] CERAMIZABLE COMPOSITION WITH FIRE PREVENTION AND HEAT INSULATION, ADHESIVE TAPE, PREPARATION METHOD AND APPLICATION

[0003] Technical Field

[0004] The present invention relates to a ceramizable composition with fire prevention and heat insulation, an adhesive tape, a preparation method therefor and an application thereof. The ceramic composition can undergo ceramic transformation in the event of a fire to form a ceramic shell in situ that is resistant to high temperatures and has a certain strength, meeting fire protection requirements under various conditions.

[0005] Background Art

[0006] With the rapid development of electrical equipment, electronics industry, new energy vehicles, chemical energy storage batteries and other fields, higher requirements are put forward on the safety of batteries thereof. When batteries encounter various mechanical or thermal abuses, extreme situations of high temperature, high heat and even open flame thermal runaway may occur. At present, fireproof materials made of polymers such as mica, aerogel, fireproof fibre 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 undergo 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. Ceramized silicone rubber has good flexibility in normal states. Also, after thermal runaway occurs, it may 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 fire prevention effect.

[0007] Therefore, battery protection products with highly efficient fire prevention, fire resistance or heat insulation performance and good anti-cracking performance are an urgent need for the development of high-safety performance batteries. Summary of the Invention

[0008] An objective of the present invention is to provide a ceramizable composition with fire prevention and heat insulation, an adhesive tape, a preparation method therefor and an application thereof, wherein the composition has fire prevention, heat insulation and anticracking performance, and good mechanical performance. The adhesive tape obtained by UV- curing the composition can be used in products such as battery components and systems, and can be ceramized 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.

[0009] In a first aspect, an embodiment of the present invention provides a ceramizable composition with fire prevention and heat insulation, raw materials of which comprise the following components:

[0010] 15-45 parts by mass of an acrylate oligomer;

[0011] 5-25 parts by mass of an active diluent;

[0012] 5-25 parts by mass of a skeleton filler;

[0013] 15-40 parts by mass of a flux;

[0014] 10-25 parts by mass of a flame retardant; and

[0015] 0.4-2 parts by mass of a photo-initiator.

[0016] Optionally, the parts by mass of the acrylate oligomer are 15-30; the parts by mass of the active diluent are 5-20; and the parts by mass of the flux are 20-35.

[0017] Optionally, the acrylate oligomer comprises at least one of aromatic acrylate, epoxy acrylate, polyester acrylate and aliphatic polyurethane acrylate.

[0018] Optionally, the acrylate oligomer has a functionality of 2, and the acrylate oligomer has a viscosity of 5000-50000 cps at a temperature of 60°C.

[0019] Optionally, the active diluent is a monofunctional acrylate monomer.

[0020] Optionally, the active diluent comprises at least one of alicyclic acrylate, alkyl acrylate and aromatic acrylate.

[0021] Optionally, the skeleton filler is an inorganic filler having a melting point greater than 1000°C.

[0022] Optionally, the skeleton filler comprises 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 skeleton filler has a particle size of 5-75 urn.

[0023] Optionally, the skeleton filler is wollastonite having a particle size of 5-45 urn and an aspect ratio of 12:1 -20:1.

[0024] Optionally, the wollastonite is surface-modified wollastonite, with a modifier comprising at least one of stearic acid, titanate, aluminate, 3-(methacryloyloxy)propyltrimethoxysilane, and y-(2,3- epoxypropoxy)propyltrimethoxysilane.

[0025] Optionally, 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 has a softening point of 400-700°C; and / or the flux has a particle size of 5-40 urn.

[0026] Optionally, the flame retardant comprises 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 oligomers.

[0027] Optionally, the composition further comprises a heat-insulating functional filler, parts by mass of which are 1 -6.

[0028] Optionally, the heat-insulating functional filler is hollow microspheres, and the hollow microspheres comprise at least one of hollow microspheres of ceramic, glass, titanium dioxide, zirconium oxide, silicon dioxide, phenolic resin, and styrene material; and / or the heat-insulating functional filler has an average particle size of 1 -300 urn, and a compressive strength of greater than 5 MPa.

[0029] Optionally, the composition further comprises reinforcing fibres, parts by mass of which are 1 - 5.

[0030] Optionally, the reinforcing fibres comprise at least one of chopped fibres and loose fibres, the chopped fibres are made of at least one selected from glass, silica, alumina, zirconium oxide, and titanium dioxide; the loose fibres are at least one selected from alkaline earth silicate fibres and aluminum silicate fibres; and / or the reinforcing fibres have a length of 1 -5 mm; and / or the reinforcing fibres have a diameter of 5-15 urn.

[0031] In a second aspect, an embodiment of the present invention provides an adhesive tape, comprising: a), a reinforcement layer; and b). a composition layer, wherein at least one side of the reinforcement layer is provided with the composition layer, and the composition layer comprises the composition described in the above embodiments.

[0032] Optionally, the reinforcement layer is at least one selected from a fibre fabric layer, mica paper, and high-silica cloth.

[0033] Optionally, the fibre fabric layer is at least one selected from glass fibres, basalt fibres, ceramic fibres, silicate fibres, and high-silica fibres.

[0034] Optionally, the adhesive tape further comprises: an adhesive layer, the adhesive layer being provided on a side of the reinforcement layer away from the composition layer; and / or the adhesive layer being provided on a side of the composition layer away from the reinforcement layer.

[0035] Optionally, the adhesive tape further comprises: an adhesive layer, the adhesive layer being provided on a side of the reinforcement layer away from the composition layer, and the adhesive layer being provided on a side of the composition layer away from the reinforcement layer; a functional layer, the functional layer being provided on a side of the adhesive layer away from the reinforcement layer, and the functional layer comprising at least one of an insulation layer, a heat insulating layer, and a strengthening layer.

[0036] Optionally, the functional layer comprises at least one of mica paper, alkaline earth silicate fibre paper, fibre braid, and aerogel foam; and / or the functional layer has a thickness of 0.1 - 1 .0 mm.

[0037] Optionally, the adhesive layer has a thickness of 25-100 urn; and / or the adhesive layer is a flame retardant layer.

[0038] Optionally, the reinforcement layer has a thickness of 0.1 -1 .3 mm; and / or the composition layer has a thickness of 0.1 -3.0 mm; and / or the adhesive tape has a thickness of 0.2-3 mm.

[0039] In a third aspect, an embodiment of the present invention provides a method for preparing an adhesive tape, comprising:

[0040] 1 ) mixing and dispersing the raw materials in the composition described in the above embodiments to obtain a slurry of a ceramizable composition with fire prevention and heat insulation; 2) coating the slurry of the ceramizable composition with fire prevention and heat insulation on a surface of a reinforcement layer and curing same to obtain a substrate of the adhesive tape; and

[0041] 3) directly applying a pressure-sensitive adhesive to a side of the reinforcement layer away from the composition layer and / or a side of the composition layer away from the reinforcement layer; or bonding a pressure-sensitive adhesive film to a side of the reinforcement layer away from the composition layer and / or a side of the composition layer away from the reinforcement layer to obtain the adhesive tape.

[0042] An embodiment of the present invention further provides an application of the adhesive tape described in the above embodiments for fire prevention and heat insulation in thermal runaway of a battery component.

[0043] In the composition according to the embodiments 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 easily coated on a lining layer, and it is easy to achieve photo-curing of the acrylate oligomer. The overall strength of the material can be enhanced by the skeleton filler, and the skeleton filler has the skeleton supporting function. 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 skeleton fillers, so that the skeleton fillers are connected as a whole, which is beneficial to maintaining the supporting strength and stability of the skeleton fillers. The flame retardant can improve the flame retardation of the material, so that the adhesive tape with the acrylate oligomer is not easy to burn at high temperature and high heat, and the structure of the adhesive tape is not easily deformed or damaged, thereby improving the performance of the adhesive tape. The adhesive tape with the acrylate oligomer can be used in a battery to protect the battery from thermal runaway.

[0044] Brief Description of the Drawings

[0045] FIG. 1 is a schematic diagram of the structure of an adhesive tape in an embodiment of the present invention;

[0046] FIG. 2 is a schematic diagram of the structure of an adhesive tape in another embodiment of the present invention;

[0047] FIG. 3 is a schematic diagram of the structure of an adhesive tape in still another embodiment of the present invention; FIG. 4 is a schematic diagram of the structure of an adhesive tape in still another embodiment of the present invention;

[0048] FIG. 5 is a schematic diagram of the structure of an adhesive tape in an embodiment of the present invention;

[0049] FIG. 6 is a schematic diagram of the structure of an adhesive tape in an embodiment of the present invention;

[0050] FIG. 7 is a schematic diagram of a heat insulation performance test;

[0051] FIG. 8 is a schematic diagram of an impact resistance test;

[0052] FIG. 9 is a schematic diagram of a test of the impact resistance of an adhesive tape; and

[0053] FIG. 10 is a schematic diagram of another test of the impact resistance of the adhesive tape.

[0054] Reference numerals

[0055] Reinforcement layer 10; composition layer 20; adhesive layer 30; functional layer 40.

[0056] Detailed Description of the Embodiments

[0057] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art on the basis of the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0058] A ceramizable composition with fire prevention and heat insulation according to an embodiment of the present invention has raw materials including the following components:

[0059] 15-45 parts by mass of an acrylate oligomer;

[0060] 5-25 parts by mass of an active diluent;

[0061] 5-25 parts by mass of a skeleton filler;

[0062] 15-40 parts by mass of a flux;

[0063] 10-25 parts by mass of a flame retardant; and

[0064] 0.4-2 parts by mass of a photo-initiator. In the composition provided by the present invention, the acrylate oligomer is easily coated on a lining layer, and it is easy to achieve photo-curing of the acrylate oligomer. The overall strength of the material can be enhanced by the skeleton filler, and the skeleton filler has the skeleton supporting function. 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 skeleton fillers, so that the skeleton fillers are connected as a whole, which is beneficial to maintaining the supporting strength and stability of the skeleton fillers. The flame retardant can improve the flame retardation of the material, so that the adhesive tape with the acrylate oligomer is not easy to burn at high temperature and high heat, and the structure of the adhesive tape is not easily deformed or damaged, thereby improving the performance of the adhesive tape. The adhesive tape with the acrylate oligomer can be used in a battery to protect the battery from thermal runaway.

[0065] The composition provided by the present invention uses ultraviolet-curable acrylate oligomers and monofunctional acrylate monomers as binder components. It is a solvent-free system which is energy-saving and environmentally friendly, and has high production efficiency and high flexibility, so that an adhesive tape containing the composition has excellent 3D conformability. The composition can be dispersed by simple physical mixing to be in a low- viscosity liquid state, and can form a thick ceramizable acrylate cured layer on a reinforcement layer by one-time coating and curing. When the composition and adhesive 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 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 retardation of the material, reduce open flames and additional heat release, and enhance the heat insulation performance of the adhesive tape with fire prevention and heat insulation. Therefore, the adhesive tape having the composition can effectively protect batteries under different degrees of combustion from thermal runaway.

[0066] In some embodiments, the parts by mass of the acrylate oligomer are 15-30; the parts by mass of the active diluent are 5-20; and the parts by mass of the flux are 20-35. For example, the parts by mass of the acrylate oligomer are 30, the parts by mass of the active diluent are 5, the parts by mass of the skeleton filler are 25, the parts by mass of the flux are 20, the parts by mass of the flame retardant are 18, and the parts by mass of the photo-initiator are 2. The specific contents of the acrylate oligomer, the reactive diluent, the skeleton filler, the flux, the flame retardant, and the photo-initiator may be selected according to actual situations. In 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 situations.

[0067] Optionally, the acrylate oligomer may have a functionality of 2, and the acrylate oligomer may have a viscosity of 5000-50000 cps at a temperature of 60°C.

[0068] 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.

[0069] Optionally, the active diluent may be a monofunctional acrylate monomer.

[0070] In some embodiments, the active diluent may include at least one of alicyclic acrylate, alkyl acrylate and aromatic acrylate.

[0071] 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, is used to enhance the overall strength of the material, and has a skeleton supporting 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, so that it is not easy to burn, and can still maintain supporting strength and stability under high temperature conditions.

[0072] 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.

[0073] The skeleton filler may have a diameter of 5-40 urn, and the specific type and content of the skeleton filler may be selected according to actual situations. Optionally, D90 of montmorillonite is <12 urn, D50 of wollastonite is <10 urn, and the aspect ratio of wollastonite may be 3:1 -5:1.

[0074] Optionally, the skeleton filler may have a particle size of 5-75 urn.

[0075] Optionally, the skeleton filler may be wollastonite having a particle size that may be 5-45 urn, and an aspect ratio that may be 12:1 -20:1. Optionally, wollastonite may be surface-modified wollastonite, with a modifier that may include at least one of stearic acid, titanate, aluminate, 3-(methacryloyloxy)propyltrimethoxysilane, and y-(2,3-epoxypropoxy)propyltrimethoxysilane.

[0076] 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 high heat conditions, so that it is not easily damaged and deformed. The melting point of the flux is lower than the melting point of the skeleton filler so that the flux can connect the skeleton filler after absorbing heat and melting. As a result, the skeleton filler and the flux are connected into an integral structure, so that the adhesive tape can maintain structural stability under high temperature and high heat conditions.

[0077] 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 flux has a particle size of 5-40 urn.

[0078] The flux may be a low-temperature melting inorganic filler, and may be at least one selected from phosphate glass powder and borate glass powder. Since the softening point and melting temperature of the flux are relatively low, they may be 400-700°C. When encountering high temperature and high heat, the flux softens and deforms, and then is in a molten state. The molten flux can connect the skeleton filler, so that the adhesive tape can maintain the integrity of the structure under high temperature and high heat conditions and have fire prevention and heat insulation effects.

[0079] 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, enabling the adhesive tape to maintain a stable structure under high temperature and high heat conditions.

[0080] Optionally, the particle size of the skeleton filler may be 5-40 urn. 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 easily coated on the lining layer, and the particles are easy to protrude from the surface coating. Therefore, the particle size of the skeleton filler may be 5-40 urn.

[0081] The flame retardant may be an inorganic hydroxide or a phosphorus-containing substance, which can improve the flame retardation 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 heat insulation performance of the fire prevention and heat insulation material and delaying the temperature rise rate of the protected substrate. 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 oligomers.

[0082] 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 situations. D90 of the flame retardant may be 80-120 urn. For example, D90 of the flame retardant may be 105 urn.

[0083] Optionally, the composition with fire prevention and heat insulation may further include a heatinsulating functional filler, and the parts by mass of the heat-insulating functional filler may be 1 -6. For example, the parts by mass of the heat-insulating functional filler may be 1 , 3 or 6, and the specific content may be adjusted according to actual needs.

[0084] 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.

[0085] Optionally, the average particle size of the heat-insulating functional filler may be 1 -300 urn, 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 urn, and the compressive strength may be 5.5 MPa.

[0086] Optionally, the composition with fire prevention and heat insulation may further include reinforcing fibres, and the parts by mass of the reinforcing fibres may be 1 -5. If the mass of the reinforcing fibres is too less, they are not easily interwoven into a mesh structure, which is disadvantageous for enhancing the strength and integrity of the composition. If the mass of the reinforcing fibres is too more, they are not easily dispersed in the composition. Therefore, the parts by mass of the reinforcing fibres may be 1 -5. The reinforcing fibres may include at least one of glass fibres, carbon fibres, and alumina fibres. The reinforcing fibres are interwoven into a mesh structure in the composition, so that the reinforcing fibres may enhance the strength and integrity of the composition, which is advantageous for maintaining the stability of the structure.

[0087] Optionally, the reinforcing fibres may include at least one of chopped fibres and loose fibres, the chopped fibres may be made of at least one selected from glass, silica, alumina, zirconium oxide, and titanium dioxide; and the loose fibres may be at least one selected from alkaline earth silicate fibres and aluminum silicate fibres. For example, the chopped fibres may be made of alumina, and the loose fibres may be aluminum silicate fibres.

[0088] Optionally, the length of the reinforcing fibres may be 1 -5 mm. For example, the length of the reinforcing fibres may be 1 mm, 3 mm or 5 mm.

[0089] Optionally, the diameter of the reinforcing fibres may be 5-15 urn. For example, the diameter of the reinforcing fibres may be 5 urn, 10 urn or 15 urn. The reinforcing fibres may be glass fibres or ceramic fibres. The length of the reinforcing fibres may be 3 mm, and the diameter of the reinforcing fibres may be 10 urn. The length of the reinforcing fibres may be 5 mm, and the diameter of the reinforcing fibres may be 15 urn. The length and diameter of the reinforcing fibres may be selected according to actual situations.

[0090] Optionally, the parts by mass of the photo-initiator may be 0.4-2. The photo-initiator facilitates the curing of the acrylate compound under ultraviolet light, thereby improving the curing efficiency. The non-solvent curing method is environmentally friendly and has high curing efficiency.

[0091] Optionally, the composition may further include a dispersant, and the parts by mass of the dispersant may be 0-3. The dispersant facilitates the dispersion of the components in the composition, which improves the dispersion effect and compatibility, and allows the composition to be mixed uniformly.

[0092] An embodiment of the present invention provides an adhesive tape. The adhesive tape includes: a), a reinforcement layer 10; and b). a composition layer 20, wherein at least one side of the reinforcement layer 10 is provided with the composition layer 20, and the composition layer 20 includes the composition described in the above embodiments.

[0093] For example, as shown in FIG. 1 , the composition layer 20 may be provided on a side of the reinforcement layer 10. The composition layer 20 may be provided on both sides of the reinforcement layer 10. The specific thickness of the reinforcement layer 10 and the composition layer 20 may be selected according to actual situations. The adhesive tape having the composition is not easy to burn under high temperature and high heat conditions, so that the structure of the adhesive tape is not easily deformed or damaged, and the performance of the adhesive tape is improved. The adhesive tape having the composition can be used in a battery to protect the battery from thermal runaway.

[0094] In some embodiments, the reinforcement layer may be at least one selected from a fibre fabric layer, mica paper, and high-silica cloth. For example, the reinforcement layer may be a fibre fabric layer, mica paper, or high-silica cloth, the reinforcement layer may be a fibre fabric layer and mica paper stacked, or the reinforcement layer can be a fibre fabric layer and high-silica cloth stacked. For example, the thickness of the reinforcement layer may be 0.1 -2 mm. The reinforcement layer may be a fibre fabric layer, and the thickness of the fibre fabric layer may be 0.2 mm. The reinforcement layer may be high-silica cloth, and the thickness of the high- silica cloth may be 0.2 mm-1 .3 mm. For example, the thickness of the high-silica cloth may be 1 mm. The specific thickness of the reinforcement layer may be selected according to actual situations. The reinforcement layer may be mica paper, and the thickness of the mica paper may be 0.1 -0.2 mm. For example, the thickness of the mica paper may be 0.15 mm.

[0095] Optionally, the fibre fabric layer may be at least one selected from glass fibres, basalt fibres, ceramic fibres, silicate fibres, and high-silica fibres. The fibre fabric layer may be a glass fibre layer, and the diameter or pore size of fibres in the fibre fabric layer may be selected according to actual situations.

[0096] Optionally, as shown in FIG. 2, the adhesive tape may further include an adhesive layer 30. The adhesive layer 30 is provided on the side of the reinforcement layer 10 away from the composition layer 20. The reinforcement layer 10 may be a fibre fabric layer or high-silica cloth.

[0097] A release film may be provided on the side of the adhesive layer 30 away from the reinforcement layer 10, and the adhesive layer may be protected by the release film. The adhesive layer may be removed when in use, and the adhesive tape may be bonded to a surface to be bonded through the adhesive layer.

[0098] Optionally, as shown in FIG. 5, an adhesive layer 30 may be provided on the side of the composition layer 20 away from the reinforcement layer 10. The reinforcement layer 10 may be a fibre fabric layer or high-silica cloth, and the adhesive layer 30 may be provided on the side of the composition layer 20 away from the reinforcement layer 10.

[0099] Optionally, as shown in FIG. 6, an adhesive layer 30 may be provided on the side of the reinforcement layer 10 away from the composition layer 20, and at the same time, an adhesive layer 30 may be provided on the side of the composition layer 20 away from the reinforcement layer 10. For example, the adhesive tape may include a reinforcement layer 10 and a composition layer 20, the reinforcement layer 10 and the composition layer 20 are stacked, and the adhesive layer 30 may be provided on both the side of the reinforcement layer 10 away from the composition layer 20 and the side of the composition layer 20 away from the reinforcement layer 10.

[0100] In some embodiments, as shown in FIG. 3, the adhesive tape may further include adhesive layers 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 insulation layer, a heat insulating layer, and a strengthening layer. The insulation layer may have an insulation function to improve the insulation effect of the adhesive tape, the heat insulating layer may have a heat insulating effect, and the strengthening layer may have a strengthening effect, which is advantageous for 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 insulation function. When the adhesive 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 adhesive tape contact the high heat or open flame.

[0101] Optionally, the functional layer may include at least one of mica paper, alkaline earth silicate fibre paper, fibre braid, and aerogel foam.

[0102] Optionally, the thickness of the functional layer is 0.1 -1 .0 mm.

[0103] Optionally, the thickness of the adhesive layer may be 25-100 urn. If the thickness of the adhesive layer is too small, it is disadvantageous for improving the bonding effect, and if the thickness of the adhesive layer is too large, it is disadvantageous for making the adhesive tape light and thin. Therefore, the thickness of the adhesive layer may be selected to be 25-100 urn.

[0104] Optionally, the adhesive layer may be a flame retardant layer.

[0105] Optionally, the thickness of the reinforcement layer may be 0.1 -1.3 mm. The reinforcement layer may be a fibre fabric layer, and the thickness of the fibre fabric layer may be 0.5 mm. The reinforcement layer may be high-silica cloth, and the thickness of the high-silica cloth may be 0.7 mm. The specific thickness of the reinforcement layer may be selected according to actual needs.

[0106] Optionally, the thickness of the composition layer may be 0.1 -3.0 mm. For example, the thickness of the composition layer may be 0.1 mm, 1 mm, 2 mm or 3.0 mm. The specific thickness may be selected according to actual situations. If the thickness of the composition layer is too small, it is disadvantageous for improving the flame retardant effect, and is also disadvantageous for achieving a good supporting strength effect, and if the thickness of the adhesive layer is too large, it is disadvantageous for making the adhesive tape light and thin. Therefore, the thickness of the composition layer may be selected to be 0.1 -3.0 mm.

[0107] Optionally, the thickness of the adhesive tape may be 0.2-3 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. An embodiment of the present invention provides a method for preparing an adhesive tape, including:

[0108] 1 ) mixing and dispersing the raw materials in the composition described in the above embodiments to obtain a slurry of a ceramizable composition with fire prevention and heat insulation;

[0109] 2) coating the slurry of the ceramizable composition with fire prevention and heat insulation on a surface of a reinforcement layer and curing same to obtain a substrate of the adhesive tape; and

[0110] 3) directly applying a pressure-sensitive adhesive to a side of the reinforcement layer away from the composition layer and / or a side of the composition layer away from the reinforcement layer; or bonding a pressure-sensitive adhesive film to a side of the reinforcement layer away from the composition layer and / or a side of the composition layer away from the reinforcement layer to obtain the adhesive tape.

[0111] The adhesive tape in the above embodiments may be prepared by the above method, so that the adhesive tape having the composition is not easy to burn under high temperature and high heat conditions. As a result, the structure of the adhesive tape is not easily deformed or damaged, and the performance of the adhesive tape is improved. The adhesive tape having the composition can be used in a battery to protect the battery from thermal runaway.

[0112] In some embodiments, the reinforcement layer may include at least one of a fibre fabric layer, mica paper, and high-silica cloth. For example, the reinforcement layer may be a fibre fabric layer, and the composition is mixed to obtain a mixed slurry, which is easily coated on the reinforcement layer. The mixed slurry is not easy to penetrate into the fabric layer, which is easy to achieve light curing.

[0113] The adhesive tape described in the above embodiments is applied for fire prevention and heat insulation in thermal runaway of a battery component. The adhesive tape in the above embodiments is not easy to burn under high temperature and high heat conditions, so that the structure of the adhesive tape is not easily deformed or damaged. The adhesive tape can be used in a battery to protect the battery from thermal runaway.

[0114] In some embodiments, the acrylate oligomer includes at least one of aromatic acrylate, epoxy acrylate, polyester acrylate, and aliphatic polyurethane acrylate, and the acrylate oligomer has a functionality of 2 and a viscosity of 100-40000 cps (60°C). This viscosity range makes it easy to coat the acrylate oligomer on the reinforcement layer, and the acrylate oligomer may be cured by photo-initiation. Preferably, the acrylate oligomer has a high curing rate and excellent flexibility.

[0115] 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 5-75 urn. Preferably, the skeleton filler is wollastonite with a particle size of 5-45 urn and an aspect ratio of 12:1 -20:1. Its main components are (in wt-%): SiO2>50%, CaO >42%, MgO<2.5%, and AI2OSS1%. 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 performance of the ceramic polymer. A modifier includes at least one of stearic acid, titanate, aluminate, 3- (methacryloyloxy) propyltrimethoxysilane, and y-(2,3-epoxypropoxy) propyltrimethoxysilane.

[0116] At high temperatures, mineral fillers may be sintered to form a ceramic shell with a self- supporting structure, but when the sintering temperature is low (500 to 800°C), the ceramic shell is not ideal in terms of strength and size retention. The flux can reduce the melting temperature of the ceramic phase, so that the polymer ceramicization process may 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 lower 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 particle size of the flux is 5-40 urn. 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.

[0117] Table 1. Composition of low melting point glass flux

[0118] Table 2. Melting range of low melting point glass flux

[0119] 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, isopropylated triphenyl phosphate and aryl phosphate oligomers.

[0120] In some embodiments, the photo-initiator is a photosensitive free radical initiator, including at least one of benzoin and its derivatives, acetophenone derivatives, aromatic ketone compounds and acylphosphine oxides.

[0121] The embodiments of the present invention provide a variety of adhesive tape structures to meet fire protection requirements under different conditions, including but not limited to the structures shown in FIGS. 1 to 6.

[0122] In some embodiments, at least one side of the reinforcement layer 10 is provided with a composition layer 20. The reinforcement layer 10 includes at least one of a fibre fabric layer and mica paper. The thickness of the reinforcement layer 10 may be 0.1 -1 .3 mm. The adhesive layer 30 is provided on at least one side of the composition layer or on the side of the reinforcement layer away from the composition layer. In order to further enhance the fire prevention and heat insulation effect, in some embodiments, a functional layer 40 is provided on the other side of the adhesive layer. The functional layer may include at least one of an insulation layer, a heat insulating layer, and a strengthening layer. The insulation layer may have an insulation function to improve the insulation effect of the adhesive tape, the heat insulating layer may have a heat insulating effect, and the strengthening layer may have a strengthening effect, which is advantageous for 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 insulation function. When the adhesive 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 adhesive tape contact the high heat or open flame.

[0123] The present invention will be further described below through some specific embodiments.

[0124] Implementations Table 3. List of raw materials

[0125] Test Method

[0126] (1) Test of heat insulation performance

[0127] A combustion test device may be shown in FIG. 7. A 0.8 mm thick steel plate A with a KTL coating was used to simulate a battery pack of a car. An adhesive tape sample B (size: 220x220 mm) was laminated on the steel plate A, butane gas was used as fuel, the burner power was 1 .85 kW, and the sample was burned by butane gas fire at above 1200°C for 10 minutes to simulate the heat insulation performance of the material under thermal runaway conditions. During this process, the temperature of a cold side (the temperature of the side of the adhesive tape away from the flame is the "cold side") and the temperature of a hot side were monitored by a k-type thermocouple or a b-type thermocouple, respectively. The lower the temperature on the cold side, the better the heat insulation performance.

[0128] (2) Test of impact resistance As shown in FIG. 8, the impact resistance of the adhesive tape was tested by simulating the impact of hot metal particles on a high-energy battery in an electric car 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°C, and the heating power was 9±1 kW. An adhesive tape C (size: 150x150mm) was superimposed on a 2mm thick aluminum plate D. The aluminum plate D was placed vertically, and the adhesive tape C faced the spray gun. The time the adhesive tape withstood the flame impact, i.e., the time required for the aluminum plate D to be burned through, was recorded in seconds. The longer the time, the stronger the impact resistance of the adhesive tape.

[0129] (3) Test of insulation

[0130] The breakdown voltage of an adhesive tape sample was tested according to IEC60243-1 standard. The higher the breakdown voltage, the better the insulation of the adhesive tape.

[0131] Examples 1 to 12

[0132] Preparation of ceramizable composition with fire prevention and heat insulation

[0133] An acrylate oligomer, an active diluent and a photo-initiator were placed in a reaction kettle with a vacuum degassing and temperature control system according to the amounts shown in Table 4, and mixed at a rotational speed of 400-700 rpm for 5-10 minutes. At a rotational speed of about 400 rpm, a flux, wollastonite and aluminum hydroxide were sequentially added to the slurry. A dispersion speed was adjusted to 2000-2200 rpm, a circulating cooling device was turned on to maintain the material temperature between 40-55°C, and the mixture was dispersed for 30-40 minutes. The rotational speed was adjusted to 300-500 rpm, and the vacuum system was turned on for 40-60 minutes to remove bubbles in the slurry to obtain a ceramizable composition with fire prevention and heat insulation.

[0134] Preparation of ceramizable adhesive tape with fire prevention and heat insulation

[0135] A composition mixture was coated on 0.2 mm thick glass fibre cloth, and a layer of release paper was covered on the upper surface of the composition layer to isolate the air, and passed through, at a certain speed, a double-roll laminating machine with a certain distance set, so as to achieve a corresponding designed thickness of 2.0 mm. Then, a 365 nm LED lamp was used to irradiate the laminated film (12 mW / cm2, 60 seconds), and after curing, an adhesive tape substrate with the structure shown in FIG. 1 was obtained.

[0136] A 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 adhesive tape with fire prevention and heat insulation having the structure as shown in FIG. 2. The corresponding performance tests were carried out according to the above test methods, and the test results are shown in Table 5. When conducting the heat insulation and impact resistance tests, the composition layer was a side directly facing the flame and impact.

[0137] An acrylate oligomer, an active diluent, a photo-initiator and a flame retardant were placed in a reaction kettle with a vacuum degassing and temperature control system according to the amounts shown in Table 4, and mixed at a rotational speed of 400-700 rpm for 5-10 minutes. At a rotational speed of about 400 rpm, a flux, wollastonite and aluminum hydroxide were sequentially added to the slurry. A dispersion speed was adjusted to 2000-2200 rpm, a circulating cooling device was turned on to maintain the material temperature between 40- 55°C, and the mixture was dispersed for 30-40 minutes. At the rotational speed of about 400 rpm, a heat-insulating functional filler is added to the kettle according to the amount shown in Table 4. The rotational speed was adjusted to 500-700 rpm, and after mixing for 10-15 minutes, the rotational speed was adjusted to 300 rpm. The vacuum system was turned on for 40-60 minutes to remove bubbles in the slurry to obtain a ceramizable composition with fire prevention and heat insulation.

[0138] A preparation method for an adhesive tape is the same as that described in Examples 1 -12, and the obtained corresponding adhesive tape with fire prevention and heat insulation is shown in FIG. 2. The corresponding performance tests were carried out according to the above test methods, and the test results are shown in Table 5. When conducting the heat insulation and impact resistance tests, the composition layer was a side directly facing the flame and impact.

[0139] Examples 16 to 22

[0140] An acrylate oligomer, an active diluent, a photo-initiator and a flame retardant were placed in a reaction kettle with a vacuum degassing and temperature control system according to the amounts shown in Table 4, and mixed at a rotational speed of 400-700 rpm for 5-10 minutes. At a rotational speed of about 400 rpm, a flux, wollastonite and aluminum hydroxide were sequentially added to the slurry. A dispersion speed was adjusted to 2000-2200 rpm, a circulating cooling device was turned on to maintain the material temperature between 40- 55°C, and the mixture was dispersed for 30-40 minutes. At the rotational speed of about 400 rpm, reinforcing fibres were added to the kettle according to the amount shown in Table 4. The rotational speed was adjusted to 800-1000 rpm, and after dispersion for 10-15 minutes, a heatinsulating functional filler was added to the kettle at the rotational speed of about 400 rpm. The rotational speed was adjusted to 500-700 rpm, and after mixing for 10-15 minutes, the rotational speed was adjusted to 300 rpm. The vacuum system was turned on for 40-60 minutes to remove bubbles in the slurry to obtain a ceramizable composition with fire prevention and heat insulation. A preparation method for an adhesive tape is the same as that described in Examples 1 -12, and the obtained corresponding adhesive tape with fire prevention and heat insulation is shown in FIG. 2. The corresponding performance tests were carried out according to the above test methods, and the test results are shown in Table 5. When conducting the heat insulation and impact resistance tests, the composition layer was a side directly facing the flame and impact.

[0141] Example 23

[0142] A 2.0 mm thick ceramizable adhesive tape substrate with fire prevention and heat insulation prepared in Example 13 was used, and sensitive adhesive films tesa58334 with release paper on a side were attached to both sides of the adhesive tape substrate by a lamination process, respectively. The adhesive layer with release paper on the composition side was peeled off, and 0.17 mm thick mica paper Firwo® S140GF46 was bonded by a lamination process onto the adhesive layer on the composition layer side to obtain a performance-enhanced ceramizable adhesive tape with fire prevention and heat insulation, as shown in FIG. 3. The obtained adhesive tape was tested for mechanical performance and fire prevention and heat insulation performance according to the above test methods. The test results are shown in Table 5. When performing the heat insulation and impact resistance performance tests, the mica layer was a side directly facing the flame and impact.

[0143] Example 24

[0144] The composition of Example 13 was used, and it was directly coated on 0.17 mm thick mica paper. According to the curing method and adhesive tape preparation method described in Examples 1 -12, a ceramizable adhesive tape with fire prevention and heat insulation having a structure as shown in FIG. 2 was obtained. The structure is different in that the reinforcement layer in this example is mica paper. When performing the heat insulation and impact resistance performance tests, the composition layer was a side directly facing the flame and impact.

[0145] Example 25

[0146] The composition of Example 13 was used, and it was directly coated on 0.6 mm thick high- silica cloth. According to the curing method and adhesive tape preparation method described in Examples 1 -12, a ceramizable adhesive tape with fire prevention and heat insulation having a structure as shown in FIG. 2 was obtained. The structure is different in that the reinforcement layer in this example is high-silica fibre cloth. When performing the heat insulation and impact resistance performance tests, the composition layer was a side directly facing the flame and impact. 26

[0147] The composition of Example 13 was used, and it was directly coated on 1.0 mm thick high- silica cloth. According to the curing method and adhesive tape preparation method described in Examples 1 -12, a ceramizable adhesive tape with fire prevention and heat insulation having a structure as shown in FIG. 2 was obtained. The structure is different in that the reinforcement layer in this example is high-silica fibre cloth. When performing the heat insulation and impact resistance performance tests, the composition layer was a side directly facing the flame and impact.

[0148] According to the components and parts by mass listed in Comparative Examples 1 -3 in Table 4 continued, the ceramizable adhesive tape with fire prevention and heat insulation shown in the structure of FIG. 2 was prepared according to the composition and adhesive tape preparation method described in Examples 13-15. When performing the heat insulation and impact resistance performance tests, the composition layer was a side directly facing the flame and impact.

[0149] The composition of Example 13 was used. According to the curing method and adhesive tape preparation method described in Examples 1 -12, a ceramizable adhesive tape with fire prevention and heat insulation having a structure as shown in FIG. 4 was obtained. The structure is different in that there is no reinforcement layer in this example.

[0150] Comparative Example 5 is different from the above examples in that the acrylate oligomer among main components 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 hydroxyl 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 a cross-linking agent.

[0151] Preparation of ceramizable silicone rubber

[0152] First, powder was dried in a vacuum drying oven at 105°C for 2 h. A double-roll opening was adjusted to 2-3 mm, the powder was added, and after it was rolled, silica and hydroxyl silicone oil were added to the silicone rubber, and mixed well. Then, mica powder, aluminum hydroxide and low melting point glass powder were added, and finally the cross-linking agent was added. A roller distance was adjusted to 1 mm. After 5 times of thinning, the roller distance was adjusted to 2mm, and the sheet was taken out. After the rubber is placed for 12 hours, it is back- refined. An electric hot plate vulcanising machine is used to press the rubber on 0.2 mm glass fibre cloth for vulcanising.

[0153] A 2.0 mm thick glass fibre-reinforced additive adhesive tape with fire prevention as shown in FIG. 2 was prepared by the adhesive tape preparation method. The obtained adhesive tape was tested for mechanical performance and fire prevention and heat insulation performance according to the above test methods. The test results are shown in Table 5. When performing the heat insulation and impact resistance performance tests, the silicone rubber layer was a side directly facing the flame and impact.

[0154] Table 4 Components and mass part contents of ceramizable compositions with fire prevention and heat insulation

[0155] Table 4 continued Table 4 continued Table 5 Performance test results of adhesive tapes in examples and comparative examples

[0156] According to Implementations 1 to 26, as shown in Table 5, the ceramizable adhesive tapes with fire prevention and heat insulation prepared by using UV-curable acrylate modified by ceramicizing powder all have excellent impact resistance, heat insulation, sintering insulation and crack resistance. In Comparative Examples 1 to 5, the prepared adhesive tapes cannot simultaneously meet the performance requirements of the present invention.

[0157] 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 of the adhesive 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 adhesive tape in Comparative Example 1 to be weak. Also, 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.

[0158] In Comparative Example 2, the skeleton filler component is missing, and the ceramic shell formed by the prepared adhesive tape is brittle and weak, and has relatively weak impact resistance.

[0159] In Comparative Example 3, the flux component is missing. Due to the lack of the constraint of the molten glass phase formed at high temperature by the flux, the adhesive tape forms a dense porous carbon layer structure, and thus the heat insulation is relatively better. However, the prepared adhesive 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.

[0160] In Comparative Example 4, the adhesive tape lacks stress constraint of the reinforcement layer, and it 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 relatively poor.

[0161] Comparative Example 5 is a ceramic solution with relatively more mature technology at present. Ceramic silicone rubber has the advantages of low heat release rate, slow combustion rate, etc. Also, 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 fire prevention, heat insulation and cracking resistance, as shown in FIGS. 9 and 10.

[0162] In addition, it may be seen from the results of Examples 9, 13 and 15 that the addition of heatinsulating functional fillers can improve the sintering insulation of the adhesive tape, especially ceramic hollow glass microspheres having 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. The embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited to the above-mentioned specific implementations, which are merely illustrative rather than restrictive. In light of the present invention, those of ordinary skill in the art 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

Claims1. Ceramizable composition with fire prevention and heat insulation, characterized in that raw materials of the composition comprise the following components:15-45 parts by mass of an acrylate oligomer;5-25 parts by mass of an active diluent;5-25 parts by mass of a skeleton filler;15-40 parts by mass of a flux;10-25 parts by mass of a flame retardant; and0.4-2 parts by mass of a photo-initiator.

2. Composition with fire prevention and heat insulation according to Claim 1 , characterized in that the parts by mass of the acrylate oligomer are 15-30; the parts by mass of the active diluent are 5-20; and the parts by mass of the flux are 20-35.

3. Composition with fire prevention and heat insulation according to Claim 1 or 2, characterized in that the acrylate oligomer comprises at least one of aromatic acrylate, epoxy acrylate, polyester acrylate and aliphatic polyurethane acrylate and / or the acrylate oligomer has a functionality of 2, and the acrylate oligomer has a viscosity of 5000-50000 cps at a temperature of 60°C.

4. Composition with fire prevention and heat insulation according to Claim 1 , characterized in that the active diluent is a monofunctional acrylate monomer and / or the active diluent comprises at least one of alicyclic acrylate, alkyl acrylate and aromatic acrylate.

5. Composition with fire prevention and heat insulation according to Claim 1 , characterized in that the skeleton filler is an inorganic filler having a melting point greater than 1000°C and / or the skeleton filler comprises 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 skeleton filler has a particle size of 5-75 urn.

6. Composition with fire prevention and heat insulation according to Claim 1 , characterized in that the skeleton filler is wollastonite having a particle size of 5-45 urn and an aspect ratio of 12:1 -20:1 , preferably the wollastonite is surface-modified wollastonite, with a modifier comprising at least one of stearic acid, titanate, aluminate, 3- (methacryloyloxy)propyltrimethoxysilane, and y-(2,3-epoxypropoxy)propyltrimethoxysilane.

7. Composition with fire prevention and heat insulation according to Claim 1 , 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 has a softening point of 400-700°C; and / or the flux has a particle size of 5-40 urn.

8. Composition with fire prevention and heat insulation according to Claim 1 , characterized in that the flame retardant comprises 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 oligomers.

9. Composition with fire prevention and heat insulation according to Claim 1 , further comprising: a heat-insulating functional filler, parts by mass of which are 1 -6 , preferably the heat-insulating functional filler is hollow microspheres, and the hollow microspheres comprise at least one of hollow microspheres of ceramic, glass, titanium dioxide, zirconium oxide, silicon dioxide, phenolic resin, and styrene material; and / or the heat-insulating functional filler has an average particle size of 1 -300 urn, and a compressive strength of greater than 5 MPa.

10. Composition with fire prevention and heat insulation according to Claim 1 , further comprising: reinforcing fibres, parts by mass of which are 1 -5, the reinforcing fibres comprise at least one of chopped fibres and loose fibres, the chopped fibres are made of at least one selected from glass, silica, alumina, zirconium oxide, and titanium dioxide; the loose fibres are at least one selected from alkaline earth silicate fibres and aluminum silicate fibres; and / or the reinforcing fibres have a length of 1 -5 mm; and / or the reinforcing fibres have a diameter of 5-15 urn.1 1 . Adhesive tape, characterized by comprising: a), a reinforcement layer; andb). a composition layer, wherein at least one side of the reinforcement layer is provided with the composition layer, and the composition layer comprises the composition according to any one of Claims 1 -10.

12. Adhesive tape according to Claim 1 1 , characterized in that the reinforcement layer is at least one selected from a fibre fabric layer, mica paper, and high-silica cloth.

13. Adhesive tape according to Claim 12, characterized in that the fibre fabric layer is at least one selected from glass fibres, basalt fibres, ceramic fibres, silicate fibres, and high-silica fibres.

14. Adhesive tape according to Claim 11 , further comprising: an adhesive layer, the adhesive layer being provided on a side of the reinforcement layer away from the composition layer; and / or the adhesive layer being provided on a side of the composition layer away from the reinforcement layer, preferably the adhesive layer has a thickness of 25-100 urn; and / or the adhesive layer is a flame retardant layer.

15. Adhesive tape according to Claim 11 , further comprising: an adhesive layer, the adhesive layer being provided on a side of the reinforcement layer away from the composition layer, and the adhesive layer being provided on a side of the composition layer away from the reinforcement layer; a functional layer, the functional layer being provided on a side of the adhesive layer away from the reinforcement layer, and the functional layer comprising at least one of an insulation layer, a heat insulating layer, and a strengthening layer.

16. Adhesive tape according to Claim 21 , characterized in that the functional layer comprises at least one of mica paper, alkaline earth silicate fibre paper, fibre braid, and aerogel foam; and / or the functional layer has a thickness of 0.1 -1 .0 mm.

17. Adhesive tape according to Claim 1 1 , characterized in that the reinforcement layer has a thickness of 0.1 -1 .3 mm; and / or the composition layer has a thickness of 0.1 -3.0 mm; and / or the adhesive tape has a thickness of 0.2-3 mm.

18. Method for preparing an adhesive tape, characterized by comprising:1 ) mixing and dispersing the raw materials in the composition according to any one ofClaims 1 to 10 to obtain a slurry of a ceramizable composition with fire prevention and heat insulation;2) coating the slurry of the ceramizable composition with fire prevention and heat insulation on a surface of a reinforcement layer and curing same to obtain a substrate of the adhesive tape; and3) directly applying a pressure-sensitive adhesive to a side of the reinforcement layer away from the composition layer and / or a side of the composition layer away from the reinforcement layer; or bonding a pressure-sensitive adhesive film to a side of the reinforcement layer away from the composition layer and / or a side of the composition layer away from the reinforcement layer to obtain the adhesive tape.

19. Application of the adhesive tape according to any one of Claims 1 1 -17 for fire prevention and heat insulation in thermal runaway of a battery component.

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