A fireproof material against thermal shock and a preparation method and application thereof

Abstract

The present application relates to a kind of anti-thermal shock fireproof material and its preparation method and application, belong to fireproof material technical field.The anti-thermal shock fireproof material of the present application includes impact layer, fireproof ceramic layer being arranged on the impact layer and glass fiber layer being arranged between the impact layer and the fireproof ceramic layer;The raw material components of impact layer and its mass fraction are as follows: first silicone rubber 40-50 parts, first curing agent 0.2-1.0 parts, first reaction aid 0.3-0.5 parts and filler 45-60 parts;The raw material components of fireproof ceramic layer and its mass fraction are as follows: second silicone rubber 30-40 parts, second curing agent 0.5-2 parts, second reaction aid 0-0.5 parts, coupling agent 0.3-1.5 parts, inorganic flame-retardant filler 20-30 parts, inorganic ceramic filler 35-45 parts, so that the anti-thermal shock fireproof material has excellent anti-thermal shock, fireproof heat insulation performance.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fireproof materials, and particularly relates to a heat shock resistant fireproof material and a preparation method and application thereof. BACKGROUND

[0002] In recent years, with the vigorous development of the new energy automobile industry, the market has greatly improved the requirements for the endurance and charging efficiency of power batteries, so high rate and high capacity and good cycle performance are the main development trend of lithium batteries. With the increasing energy density of lithium ion power batteries, the endurance time of the batteries is prolonged, and the incidents of spontaneous combustion and explosion of lithium ion batteries are also increasing; under the conditions of overcharging, short circuit, high temperature, impact and the like, thermal runaway behavior may occur, a large amount of high-temperature impact force is instantaneously released, the local temperature can reach thousands of degrees Celsius, the metal shell is melted away, a chain reaction is caused to lead to a fire or even an explosion accident, causing great losses to related enterprises and users.

[0003] Chinese patent CN 112928362A discloses a multi-layer fireproof material for a battery and a manufacturing method thereof, which comprises a fireproof material substrate and a protective layer coated on the outer surface of the fireproof material substrate; the fireproof material substrate comprises, from top to bottom, a first glass fiber cloth layer, a ceramicized silicone rubber layer and a second glass fiber cloth layer; the disclosed multi-layer fireproof material has remarkable fire-retardant and fireproof effects, good weather resistance and environmental protection performance, sufficient high-temperature flame impact resistance and good mechanical properties. However, the fireproof material of the invention has a five-layer structure, has extremely poor flexibility and is difficult to meet the requirements of different working conditions; moreover, the process is complex, the processing difficulty is high and the cost is high.

[0004] Chinese patent CN 118271850A discloses a fire-retardant and fire-resistant silicone rubber material and a preparation method thereof, wherein the fire-retardant and fire-resistant silicone rubber material is prepared from the following raw materials in a mass percentage: 1%-5% of hydrogen-containing silicone oil, 4%-6% of vinyl silicone oil, 2%-4% of hydroxyl silicone oil, 18%-22% of a compounded fire-retardant filler, 8%-12% of carbon black, 0.5%-1.0% of a silane coupling agent, 0.1%-0.2% of a release agent, 0.1%-0.3% of a platinum catalyst, 0.1%-0.2% of an inhibitor, and the balance of raw rubber. The silicone rubber material has good fire-retardant and fire-resistant performance at a relatively low fire-retardant filler addition amount, while reducing the overall production cost. However, although the method improves the fire-retardant performance and flexibility, it is not resistant to high-temperature thermal shock and does not insulate heat, various pretreatments are required in the preparation process, and the manufacturing cost is very high.

[0005] Therefore, there is an urgent need for a fireproof material that can resist thermal shock and prevent fire on the battery, so that even in the face of extreme thermal runaway, the structure will not be completely destroyed by high-temperature impact, causing more losses. SUMMARY

[0006] To solve the above technical problems, the application provides an anti-thermal shock fireproof material and a preparation method and application thereof, wherein methylphenyl vinyl silicone oil / silicone resin is compounded in the impact resistance layer to improve the temperature resistance of the impact resistance layer, so that the temperature range of the anti-thermal shock fireproof material is more excellent, and the maximum short-time high temperature resistance is above 350 DEG C, which is beneficial to the formation of the impact resistance layer, reduces the ablation rate, and enhances the compactness of the impact resistance layer after high temperature; the composite filler is rapidly fused and bonded into a porcelain impact resistance layer at a lower temperature; when facing high temperature thermal shock, the glass fiber layer is blocked by the flame, and the fireproof ceramic layer is enough to gain time for ceramicization, which plays a dual role of anti-thermal shock and fireproof heat insulation.

[0007] A first object of the application is to provide an anti-thermal shock fireproof material, which comprises an impact resistance layer, a fireproof ceramic layer arranged on the impact resistance layer, and a glass fiber layer arranged between the impact resistance layer and the fireproof ceramic layer.

[0008] The raw material components of the impact resistance layer and the mass parts thereof are as follows: 40-50 parts of first silicone rubber, 0.2-1.0 parts of first curing agent, 0.3-0.5 parts of first reaction aid, and 45-60 parts of filler; the first silicone rubber comprises first methyl vinyl silicone oil, methylphenyl vinyl silicone oil, and methylphenyl vinyl silicone resin; the first curing agent comprises first hydrogen-containing silicone oil and methylphenyl hydrogen-containing silicone resin; and the filler comprises first silazane-treated fumed silica, silicon powder, lithium carbonate, sodium carbonate, and wollastonite.

[0009] The raw material components of the fireproof ceramic layer and the mass parts thereof are as follows: 30-40 parts of second silicone rubber, 0.5-2 parts of second curing agent, 0-0.5 parts of second reaction aid, 0.3-1.5 parts of coupling agent, 20-30 parts of inorganic flame-retardant filler, and 35-45 parts of inorganic ceramic filler.

[0010] In an embodiment of the application, the mass ratio of the first methyl vinyl silicone oil, the methylphenyl vinyl silicone oil, and the methylphenyl vinyl silicone resin in the silicone rubber is (30-45):(1-5):(2-6).

[0011] Further, the viscosity of the first methyl vinyl silicone oil is 1000 mPas-5000 mPas, and the vinyl content is 0.2%-1.0%;

[0012] The phenyl molar fraction of the methylphenyl vinyl silicone oil is 5%-15%, the viscosity is 1000 mPas-6000 mPas, and the vinyl content is 0.1%-0.5%;

[0013] The phenyl mole fraction of the methylphenyl vinyl silicone resin is 20%-40%, the viscosity is 1000 mPas-10000 mPas, and the vinyl content is 0.5%-1.5%.

[0014] In an embodiment of the present application, the mass ratio of the first hydrogen-containing silicone oil and the methylphenyl hydrogen-containing silicone resin is (0.7-0.9):(0.1-0.3). By compounding the hydrogen-containing silicone oil and the methylphenyl hydrogen-containing silicone resin, the material can have high-temperature resistance while having sufficient flexibility.

[0015] Further, the hydrogen content of the first hydrogen-containing silicone oil is 0.18-1.5%;

[0016] The hydrogen content of the methylphenyl hydrogen-containing silicone resin is 0.2-0.5%.

[0017] In an embodiment of the present application, the mass ratio of the first silazane-treated fumed silica, silicon powder, lithium carbonate, sodium carbonate, and wollastonite is (20-27):(5-10):(14-20):(2-5):(4-6).

[0018] Further, the specific surface area of the first silazane-treated fumed silica is 100 m 2 / g-250 m 2 / g.

[0019] The particle size D50 of the silicon powder and wollastonite is ≤10 μm, and D90 is ≤50 μm. By compounding different fillers and limiting the particle size, the impact-resistant layer can be made thin enough while achieving the effect of resisting thermal shock.

[0020] In an embodiment of the present application, the first reaction aid is selected from a first acetylenic alcohol inhibitor and / or a first platinum catalyst.

[0021] Further, the platinum content of the first platinum catalyst is 1000 ppm-3000 ppm.

[0022] In an embodiment of the present application, the second silicone rubber is selected from one or more of a second methyl vinyl silicone oil, a methyl vinyl silicone resin, and a methyl vinyl silicone rubber gum; further, the molecular weight of the methyl vinyl silicone rubber gum is 400-650 thousand, and the vinyl content is 0.05%-3.5%;

[0023] The second curing agent is selected from one or more of a second hydrogen-containing silicone oil, bis(2,4-dichlorobenzoyl) peroxide, and 2,5-dimethyl-2,5-di(tert-butylperoxy) hexane.

[0024] The second reaction aid is selected from one or more of a release agent, a second acetylenic alcohol inhibitor, and a second platinum catalyst; further, the release agent is zinc stearate; the second platinum catalyst has a platinum content of 1000 ppm to 3000 ppm;

[0025] The coupling agent is selected from one or more of gamma-methacryloxypropyltrimethoxysilane, gamma-(2,3-epoxypropoxy)propyltrimethoxysilane, 3-aminopropyltrimethoxysilane, dodecyltrimethoxysilane, and vinyltrimethoxysilane;

[0026] The inorganic flame-retardant filler is selected from one or more of aluminum hydroxide, magnesium hydroxide, benzotriazole, and carbon black; preferably, the inorganic flame-retardant filler comprises aluminum hydroxide and carbon black; the mass ratio of the aluminum hydroxide and carbon black is (18-25):(1-3); the particle size D50 of the aluminum hydroxide is ≤10 μm, and D90 is ≤50 μm; through the compounding and particle size limitation of different inorganic flame-retardant fillers, the fireproof ceramic layer can be made to have a sufficiently thin thickness while having sufficient flame-retardant performance.

[0027] The inorganic ceramic filler is selected from one or more of mica powder, kaolin, glass powder, zinc borate, diatomite, zinc oxide, second silazane-treated fumed silica, alumina, magnesium oxide; preferably, the inorganic ceramic filler comprises mica powder, glass powder, zinc borate, diatomite, and second silazane-treated fumed silica, and the mass ratio of the mica powder, glass powder, zinc borate, diatomite, and second silazane-treated fumed silica is (20-25):(2-5):(4-10):(3-6):(1-3); the particle size D50 of the mica powder, glass powder, zinc borate, and diatomite is ≤10 μm, and D90 is ≤50 μm; the specific surface area of the second silazane-treated fumed silica is 100 m 2 / g-250 m 2 / g.

[0028] In an embodiment of the present application, the thickness of the impact-resistant layer is 0.2 mm-0.5 mm, for example, can be 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, etc.

[0029] The thickness of the glass fiber layer is 0.2 mm-0.8 mm, for example, can be 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, etc.

[0030] The thickness of the fireproof ceramic layer is 0.4 mm-2.0 mm, for example, can be 0.4 mm, 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2.0 mm, etc.

[0031] A second object of the present application is to provide a preparation method of the heat shock-resistant fireproof material, comprising the following steps:

[0032] S1, sequentially adding fillers, a first curing agent and a first reaction aid into the first silicone rubber and stirring uniformly to obtain an impact-resistant layer glue;

[0033] S2, sequentially adding inorganic ceramic fillers, a coupling agent, inorganic flame-retardant fillers, a second reaction aid and a second curing agent into the second silicone rubber and stirring uniformly to obtain a fireproof ceramic layer glue;

[0034] S3, calendering the fireproof ceramic layer glue of S2 on one side of the glass fiber layer and coating the impact-resistant layer glue of S1 on the other side to obtain the heat shock-resistant fireproof material.

[0035] In an embodiment of the present application, in S2, when the inorganic ceramic fillers, the coupling agent and the inorganic flame-retardant fillers are added, the temperature of the glue is 80-100℃;

[0036] When the second reaction aid and the second curing agent are added, the temperature of the glue is 15-40℃.

[0037] A third object of the present application is to provide an application of the heat shock-resistant fireproof material in new energy power batteries.

[0038] The technical solution of the present application has the following advantages compared with the prior art:

[0039] The heat shock-resistant fireproof material of the present application prevents high-temperature thermal impact force when the battery is out of control through the impact-resistant layer. The methylphenyl vinyl silicone oil / silicone resin compounded in the impact-resistant layer improves the temperature resistance of the impact-resistant layer, so that it can remain intact at 350℃ short-time high temperature, which gives the fireproof ceramic layer time to ceramicize. Meanwhile, the low ablation rate of the methylphenyl vinyl silicone oil / silicone resin allows more silicon dioxide and fumed silica to combine and fill after ablation, which makes the ablated shell more solid. At the same time, the fillers lithium carbonate and sodium carbonate compounded in the impact-resistant layer can lower the sintering temperature of the silicon powder, wollastonite and fumed silica treated with silazane, so that they can rapidly sinter into a solid shell at a lower temperature to offset part of the thermal impact force. In this way, when facing high-temperature thermal impact, the overall material can exhibit perfect fireproof performance. In addition, the fireproof ceramic layer behind has enough time to high-temperature ceramicize, forming a fireproof ceramic layer with a hard shell and multiple pores, which further blocks the flame while the porous structure and sealed structure can also isolate temperature and voltage and current, achieving the effect of heat and electrical insulation. DETAILED DESCRIPTION

[0040] The present application will be further described with reference to the following specific examples. It will be apparent that the examples described are only by way of example of the present application and are not intended to be limiting of the present application. It should be understood that the specific examples are intended to illustrate the present application and not to limit the scope of the application.

[0041] In the present application, unless otherwise specified, the technical and scientific terms used in the present application have the same meanings as those commonly understood by the person skilled in the art to which the present application belongs.

[0042] In the present application, unless otherwise specified, the term "and / or" used in the present application includes any and all combinations of one or more of the relevant listed items.

[0043] In the present application, unless otherwise specified, the experimental methods used in the embodiments of the present application are conventional methods, and the materials, reagents, etc. used are commercially available, unless otherwise specified.

[0044] In the present application, unless otherwise specified, the viscosity of the methyl vinyl silicone oil used in the embodiments of the present application is 1000 mPas, and the vinyl content is 0.28%.

[0045] In the present application, unless otherwise specified, the phenyl mole fraction of the methyl phenyl vinyl silicone oil used in the embodiments of the present application is 10%, the viscosity is 2500 mPas, and the vinyl content is 0.19%.

[0046] In the present application, unless otherwise specified, the phenyl mole fraction of the methyl phenyl vinyl silicone resin used in the embodiments of the present application is 37%, the viscosity is 6000 mPas, and the vinyl content is 0.85%.

[0047] In the present application, unless otherwise specified, the specific surface area of the silazane-treated fumed silica used in the embodiments of the present application is 150 m 2 / g.

[0048] In the present application, unless otherwise specified, the particle size D50 of the silicon powder used in the embodiments of the present application is 1.5 μm, and the particle size D90 is 50 μm.

[0049] In the present application, unless otherwise specified, the particle size D50 of the wollastonite used in the embodiments of the present application is 5 μm, and the particle size D90 is 50 μm.

[0050] In the present application, unless otherwise specified, the hydrogen content of the hydrogen-containing silicone oil used in the embodiments of the present application is 0.75%.

[0051] In the present application, unless otherwise specified, the methylphenyl hydrogen-containing silicone resin used in the embodiments of the present application has a hydrogen content of 0.3%.

[0052] In the present application, unless otherwise specified, the platinum content of the first platinum catalyst used in the embodiments of the present application is 2000 ppm; the platinum content of the second platinum catalyst is 3000 ppm.

[0053] In the present application, unless otherwise specified, the first methylvinyl silicone rubber raw rubber used in the embodiments of the present application has a molecular weight of 620,000 and a vinyl content of 0.05%; the second methylvinyl silicone rubber raw rubber has a molecular weight of 620,000 and a vinyl content of 3.0%.

[0054] In the present application, unless otherwise specified, the mica powder used in the embodiments of the present application has a particle size D50 of 5 μm and a D90 of 45 μm.

[0055] In the present application, unless otherwise specified, the glass micro powder used in the embodiments of the present application has a particle size D50 of 3 μm and a D90 of 40 μm.

[0056] In the present application, unless otherwise specified, the zinc borate used in the embodiments of the present application has a particle size D50 of 2 μm and a D90 of 40 μm.

[0057] In the present application, unless otherwise specified, the diatomite used in the embodiments of the present application has a particle size D50 of 5 μm and a D90 of 40 μm.

[0058] In the present application, unless otherwise specified, the aluminum hydroxide used in the embodiments of the present application has a particle size D50 of 1.5 μm and a D90 of 40 μm.

[0059] Example 1

[0060] The heat shock resistant fireproof material and the preparation method thereof of the present embodiment specifically comprises the following steps:

[0061] S1, 32.5 parts of methylvinyl silicone oil, 3.5 parts of methylphenyl vinyl silicone oil and 4 parts of methylphenyl vinyl silicone resin are added into a kneader and stirred for 10 min; then 25.7 parts of silazane treated fumed silica, 9 parts of silicon micro powder, 16 parts of lithium carbonate, 3 parts of sodium carbonate, 5 parts of wollastonite are continuously stirred for 20 min; 0.7 parts of hydrogen-containing silicone oil, 0.3 parts of methylphenyl hydrogen-containing silicone resin and 0.03 parts of acetylene alcohol inhibitor are continuously stirred for 20 min; finally, 0.27 parts of the first platinum catalyst is stirred for 30 min to obtain the impact resistant layer glue;

[0062] S2, 32 parts of the first methyl vinyl silicone rubber raw rubber and 0.7 parts of the second methyl vinyl silicone rubber raw rubber were added into a kneader, and stirred at 80℃ for 10 min; while keeping the temperature at 80℃, 24 parts of mica powder, 4 parts of glass powder, 8 parts of zinc borate, 5.5 parts of diatomite, 2 parts of fumed silica treated by silazane and 0.3 parts of γ-methacryloxypropyltrimethoxysilane were continuously added and stirred for 20 min; 20 parts of aluminum hydroxide and 2 parts of carbon black were continuously added and stirred for 20 min; the temperature was lowered to room temperature, 0.25 parts of zinc stearate and 0.25 parts of the second platinum catalyst were added and stirred for 20 min; 1 part of bis(2,4-dichlorobenzoyl) peroxide was continuously added and stirred for 30 min to obtain the fireproof ceramic layer glue;

[0063] S3, the glass fiber with a thickness of 0.2 mm was used as a support film, the fireproof ceramic layer glue was calendared on the glass fiber by a calender to form a fireproof ceramic layer with a thickness of 0.6 mm, and then wound up; the obtained roll material was used as a bottom film, the impact-resistant layer glue was coated on the other side of the glass fiber by a coating machine to form an impact-resistant layer with a thickness of 0.2 mm, thereby obtaining the heat shock resistant fireproof material.

[0064] Example 2

[0065] The heat shock resistant fireproof material and the preparation method thereof of the present embodiment specifically include the following steps:

[0066] S1, 35.5 parts of methyl vinyl silicone oil, 3.5 parts of methyl phenyl vinyl silicone oil and 4 parts of methyl phenyl vinyl silicone resin were added into a kneader and stirred for 10 min; then 24.7 parts of fumed silica treated by silazane, 8 parts of silicon powder, 15 parts of lithium carbonate, 3 parts of sodium carbonate and 5 parts of wollastonite were continuously added and stirred for 20 min; 0.7 parts of hydrogen-containing silicone oil, 0.3 parts of methyl phenyl hydrogen-containing silicone resin and 0.03 parts of acetylene alcohol inhibitor were continuously added and stirred for 20 min; finally, 0.27 parts of the first platinum catalyst was added and stirred for 30 min to obtain the impact-resistant layer glue;

[0067] S2, 32 parts of the first methyl vinyl silicone rubber raw rubber and 0.7 parts of the second methyl vinyl silicone rubber raw rubber were added into a kneader, and stirred at 80℃ for 10 min; while keeping the temperature at 80℃, 24 parts of mica powder, 4 parts of glass powder, 8 parts of zinc borate, 5.5 parts of diatomite, 2 parts of fumed silica treated by silazane and 0.3 parts of γ-methacryloxypropyltrimethoxysilane were continuously added and stirred for 20 min; 20 parts of aluminum hydroxide and 2 parts of carbon black were continuously added and stirred for 20 min; the temperature was lowered to room temperature, 0.25 parts of zinc stearate and 0.25 parts of the second platinum catalyst were added and stirred for 20 min; 1 part of bis(2,4-dichlorobenzoyl) peroxide was continuously added and stirred for 30 min to obtain the fireproof ceramic layer glue;

[0068] S3, the glass fiber with a thickness of 0.5 mm is used as a supporting film, the fireproof ceramic layer glue is calendared on the glass fiber through a calender to form a fireproof ceramic layer with a thickness of 1.2 mm, and then the fireproof ceramic layer is wound; the obtained roll material is used as a bottom film, the impact-resistant layer glue is coated on the other side of the glass fiber through a coating machine to form an impact-resistant layer with a thickness of 0.3 mm, and thus the heat-impact-resistant fireproof material is obtained.

[0069] Example 3

[0070] The heat-impact-resistant fireproof material and the preparation method thereof of the present example specifically include the following steps:

[0071] S1, 42.5 parts of methyl vinyl silicone oil, 3.5 parts of methyl phenyl vinyl silicone oil and 4 parts of methyl phenyl vinyl silicone resin are added into a kneader and stirred for 10 min; then 20.7 parts of silazane-treated fumed silica, 5 parts of silicon powder, 15 parts of lithium carbonate, 3 parts of sodium carbonate, 5 parts of wollastonite are continuously stirred for 20 min; 0.8 parts of hydrogen-containing silicone oil, 0.2 parts of methyl phenyl hydrogen-containing silicone resin and 0.03 parts of acetylene alcohol inhibitor are continuously stirred for 20 min; finally, 0.27 parts of the first platinum catalyst is added and stirred for 30 min, and thus the impact-resistant layer glue is obtained;

[0072] S2, 38 parts of the first methyl vinyl silicone rubber raw rubber and 0.7 parts of the second methyl vinyl silicone rubber raw rubber are added into a kneader, and stirred for 10 min after the temperature is raised to 80℃; 20 parts of mica powder, 4 parts of glass powder, 6 parts of zinc borate, 3.5 parts of diatomite, 2 parts of silazane-treated fumed silica and 0.3 parts of γ-methacryloxypropyltrimethoxysilane are continuously stirred for 20 min after the temperature is kept at 80℃; 22 parts of aluminum hydroxide and 2 parts of carbon black are continuously stirred for 20 min; the temperature is lowered to room temperature, 0.25 parts of zinc stearate and 0.25 parts of the second platinum catalyst are added and stirred for 20 min; 1 part of bis(2,4-dichlorobenzoyl) peroxide is continuously stirred for 30 min, and thus the fireproof ceramic layer glue is obtained;

[0073] S3, the glass fiber with a thickness of 0.8 mm is used as a supporting film, the fireproof ceramic layer glue is calendared on the glass fiber through a calender to form a fireproof ceramic layer with a thickness of 1.7 mm, and then the fireproof ceramic layer is wound; the obtained roll material is used as a bottom film, the impact-resistant layer glue is coated on the other side of the glass fiber through a coating machine to form an impact-resistant layer with a thickness of 0.5 mm, and thus the heat-impact-resistant fireproof material is obtained.

[0074] Comparative Example 1

[0075] The basic procedure is the same as that in Example 1, except that the methyl phenyl vinyl silicone oil and the methyl phenyl vinyl silicone resin are replaced by the first methyl vinyl silicone rubber raw rubber.

[0076] Comparative Example 2

[0077] The same as example 1, except that no lithium carbonate is added.

[0078] Comparative example 3

[0079] The same as example 1, except that no sodium carbonate is added.

[0080] Comparative example 4

[0081] The same as example 1, except that the amount of silazane-treated fumed silica in the impact-resistant layer glue is adjusted from 25.7 parts to 5.7 parts.

[0082] Test example

[0083] The heat-resistant fireproof materials of examples 1-3 and comparative examples 1-4 are tested for heat insulation performance and the like;

[0084] Heat insulation performance: test back temperature after burning at 1300±100℃ for 30 min;

[0085] Thermal shock resistance: observe whether the material is penetrated after 5 min of gas impact at 1300±100℃ and 1 MPa;

[0086] Fireproof performance: observe whether the material is penetrated after burning at 1300±100℃ for 30 min;

[0087] Table 1 shows the finally measured relevant performances:

[0088] Table 1

[0089] Specimen Thermal insulation performance Thermal shock resistance Fire resistance Example 1 ＜500℃ Not penetrated Not burned through Example 2 ＜400℃ Not penetrated Not burned through Example 3 ＜400℃ Not penetrated Not burned through Comparative Example 1 ＞500℃ Penetrated Burned through Comparative Example 2 ＞500℃ Penetrated Burned through Comparative Example 3 ＞500℃ Penetrated Burned through Comparative Example 4 ＞500℃ Penetrated Burned through

[0090] As can be seen from Table 1, the material of the examples is not easily penetrated, has good impact resistance, and good heat insulation.

[0091] Comparing example 1 with comparative example 1 shows that when the phenyl silicone rubber is not introduced, the raw rubber of the methyl vinyl silicone rubber in the material subjected to high-temperature thermal shock is rapidly ablated in large amounts, forming a large number of dense holes in the material, which loses solidity and is easily penetrated.

[0092] Comparing example 1 with comparative examples 2-3 shows that when lithium carbonate or sodium carbonate is not introduced, the sintering temperature of the silicon powder, the wollastonite, and the silazane-treated fumed silica is very high, and when subjected to thermal shock, it cannot completely sinter into a solid shell, has very low strength, and cannot resist the thermal shock force, and is easily penetrated.

[0093] Comparing example 1 with comparative example 4 shows that when the amount of silazane-treated fumed silica is insufficient, although it can also sinter into a dense shell, the strength of the built body skeleton is not high, and when subjected to thermal shock, it cannot resist the thermal shock force, and is easily penetrated.

[0094] Obviously, the above-mentioned embodiments are only examples for clearly illustrating the present application, and are not intended to limit the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and also impossible to enumerate all the embodiments. The obvious changes or variations derived from the above description are still within the protection scope of the present application.

Claims

1. A fire resistant material against thermal shock, characterized in that, The anti-impact layer, the fireproof ceramic layer arranged on the anti-impact layer, and the glass fiber layer arranged between the anti-impact layer and the fireproof ceramic layer are provided. The raw material components of the anti-impact layer and the mass parts thereof are as follows: 40-50 parts of first silicone rubber, 0.2-1.0 parts of first curing agent, 0.3-0.5 parts of first reaction aid, and 45-60 parts of filler; the first silicone rubber comprises first methyl vinyl silicone oil, methyl phenyl vinyl silicone oil, and methyl phenyl vinyl silicone resin; the first curing agent comprises first hydrogen-containing silicone oil and methyl phenyl hydrogen-containing silicone resin; the filler comprises first silazane-treated fumed silica, silicon powder, lithium carbonate, sodium carbonate, and wollastonite; the mass ratio of the first silazane-treated fumed silica, silicon powder, lithium carbonate, sodium carbonate, and wollastonite is (20-27):(5-10):(14-20):(2-5):(4-6); The raw material components of the fireproof ceramic layer and the mass parts thereof are as follows: 30-40 parts of second silicone rubber, 0.5-2 parts of second curing agent, 0-0.5 parts of second reaction aid, 0.3-1.5 parts of coupling agent, 20-30 parts of inorganic flame-retardant filler, and 35-45 parts of inorganic ceramic filler.

2. The fire resistant material according to claim 1, wherein The mass ratio of the first methyl vinyl silicone oil, the methyl phenyl vinyl silicone oil, and the methyl phenyl vinyl silicone resin in the silicone rubber is (30-45):(1-5):(2-6).

3. The fire resistant material according to claim 1, wherein The mass ratio of the first hydrogen-containing silicone oil and the methyl phenyl hydrogen-containing silicone resin is (0.7-0.9):(0.1-0.3).

4. The fire resistant material according to claim 1, wherein The first reaction aid is selected from first alkyne alcohol inhibitor and / or first platinum catalyst.

5. The thermal-shock resistant fireproof material of claim 1, wherein, The second silicone rubber is selected from one or more of second methyl vinyl silicone oil, methyl vinyl silicone resin, and methyl vinyl silicone rubber raw rubber; The second curing agent is selected from one or more of second hydrogen-containing silicone oil, bis(2,4-dichlorobenzoyl) peroxide, and 2,5-dimethyl-2,5-di(tert-butylperoxy) hexane; The second reaction aid is selected from one or more of release agent, second alkyne alcohol inhibitor, and second platinum catalyst; The coupling agent is selected from one or more of γ-methacryloyloxypropyltrimethoxysilane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, 3-aminopropyltrimethoxysilane, dodecyltrimethoxysilane, and vinyltrimethoxysilane; The inorganic flame-retardant filler is selected from one or more of aluminum hydroxide, magnesium hydroxide, benzotriazole, and carbon black; The inorganic ceramic filler is selected from one or more of mica powder, pottery clay, glass powder, zinc borate, diatomite, zinc oxide, second silazane-treated fumed silica, aluminum oxide, and magnesium oxide.

6. The fire resistive material of claim 1, wherein, The thickness of the anti-impact layer is 0.2-0.5 mm; The thickness of the glass fiber layer is 0.2-0.8 mm; The thickness of the fireproof ceramic layer is 0.4-2.0 mm.

7. A method of producing a fire resistant material against thermal shock according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: S1, adding filler, first curing agent, and first reaction aid into first silicone rubber in sequence, stirring uniformly, and obtaining anti-impact layer glue; S2, adding inorganic ceramic filler, coupling agent, inorganic flame retardant filler, second reaction aid and second curing agent into the second silicone rubber in sequence and stirring uniformly to obtain a fireproof ceramic layer glue; S3, calendering the fireproof ceramic layer glue of S2 on one side of the glass fiber layer and coating the impact-resistant layer glue of S1 on the other side to obtain the heat-impact-resistant fireproof material.

8. The method for preparing the thermal shock resistant fireproof material according to claim 7, characterized in that, In S2, the temperature of the glue is 80-100℃ when adding inorganic ceramic filler, coupling agent and inorganic flame retardant filler; The temperature of the glue is 15-40℃ when adding second reaction aid and second curing agent.

9. Application of the heat-impact-resistant fireproof material of any one of claims 1-6 in new energy power batteries.