CN110760050A - Heat-insulating flame-retardant material, preparation method thereof and battery pack - Google Patents
Heat-insulating flame-retardant material, preparation method thereof and battery pack Download PDFInfo
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- CN110760050A CN110760050A CN201810884658.1A CN201810884658A CN110760050A CN 110760050 A CN110760050 A CN 110760050A CN 201810884658 A CN201810884658 A CN 201810884658A CN 110760050 A CN110760050 A CN 110760050A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/28—Glass
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2101/00—Manufacture of cellular products
Abstract
The invention provides a heat-insulating flame-retardant material which is prepared by compounding a component A and a component B, wherein the component A comprises an isocyanic acid blocked polymer, the component B comprises polyol, a catalyst and a foam stabilizer, and an organic solvent and a filler can be in the component A or the component B. The invention also provides a preparation method of the heat-insulating flame-retardant material, which comprises the steps of stirring, mixing and foaming. The invention utilizes the matching of the organic solvent and the filler to improve the heat insulation and flame retardant performance of the material on the premise of not obviously improving the viscosity of a compound system.
Description
Technical Field
The invention relates to a heat-insulating flame-retardant material, a preparation method and a battery pack.
Background
With the gradual depletion of fossil energy, energy problems gradually become a significant factor restricting the development of the global automobile industry. Therefore, the development of new energy vehicles is paid attention and is greatly supported by governments of various countries, and among them, electric vehicles are developed most rapidly. The battery types of the common pure electric vehicles mainly include lead-acid power batteries, nickel-hydrogen power batteries and lithium-ion power batteries.
Compared with a lead-acid power battery and a nickel-hydrogen power battery, the lithium-ion power battery has the following outstanding advantages: 1. the single voltage platform is high, so that a battery pack can be conveniently formed; 2. has high stored energy density; 3. the service life is relatively long; 4. the high-power bearing capacity is realized, and the electric automobile accelerator is very suitable for frequent starting and acceleration of the electric automobile; 5. the self-discharge rate is very low; 6. the memory effect is avoided, and the charging and discharging can be carried out at any time, so that the use convenience of the electric automobile is greatly expanded; 7. the adaptability to high and low temperatures is strong, and a solid foundation is provided for the applicability of the electric automobile in various regional environments; 8. the method is green and environment-friendly, the reserves of main raw materials such as lithium, iron, manganese and the like are rich, water is not consumed basically in the production process, and the method is very beneficial to countries and regions with water resource shortage; compared with lead-acid power batteries and nickel-hydrogen power batteries, toxic and harmful heavy metal substances such as lead, mercury, cadmium and the like are not generated in the production, use and scrapping processes.
Based on the above advantages, the electric vehicle using the lithium ion power battery as the power source has been increased explosively. However, in practical applications, it is found that since the power battery of the electric vehicle is often in a vibration environment, the battery module inside the power battery is easily affected by the vibration, and then the service life of the power battery is reduced, so that the reliability of the power battery is difficult to ensure; in addition, the battery cell in the battery module continuously emits heat in the use process, so that thermal runaway is easily caused, and even the battery module is ignited to cause safety accidents. Therefore, how to improve the safety and reliability of the power battery becomes a problem to be solved urgently.
Disclosure of Invention
The invention discloses a heat-insulating flame-retardant material which comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 0.1: 1-10: 1;
the component A comprises an isocyanic acid-terminated polymer,
the component B comprises the following compounds in parts by weight:
alternatively, the first and second electrodes may be,
the component A comprises the following compounds in parts by weight:
10-50 parts of isocyanic acid blocked polymer
40-90 parts of organic solvent
1 to 100 parts of filler
The component B comprises the following compounds in parts by weight:
10-50 parts of polyol
0.1 to 0.5 portion of catalyst
0.1-1 part of foam stabilizer
The content of NCO in the isocyanate-terminated polymer is 10% -40%, the polyol is flame-retardant polyol, the organic solvent is non-flammable low-boiling-point solvent, the filler is a heat-insulating flame-retardant filler, and the catalyst comprises at least one of organic tin catalysts or amine catalysts.
Wherein, the low boiling point solvent is: a solvent having a boiling point below 40 ℃.
The isocyanate-terminated polymer may be prepared by conventional techniques. The existence of the filler in the material is beneficial to improving the heat insulation and flame retardant properties of the material, particularly for the material with high filler content, the heat insulation and flame retardant properties are greatly improved, but in actual operation, the fact that the system viscosity of the compound is sharply increased along with the improvement of the filler proportion is found, and the filler cannot be thoroughly wetted and dispersed in the glue solution; at the same time, increasing the content of filler also reduces the expansion of the material. Tests show that the organic solvent can reduce the system viscosity of the compound so as to solve the problem of system viscosity increase caused by increasing the content of the filler, so that the filler is thoroughly wetted and dispersed in the glue solution; meanwhile, the organic solvent can be used as a foaming agent, so that the problem of reduction of the foaming multiple caused by improvement of the content of the filler is solved, a certain foaming multiple can be finally ensured, and the heat insulation and flame retardant properties of the material can be further improved. In addition, tests show that after the content of the filler in the material after curing exceeds 3%, the strength of the material is reduced along with the continuous increase of the content, and the characteristic is combined with the foaming multiple of the material, so that the material has a good buffering effect on vibration.
In one embodiment of the present invention, the weight part of the filler in the component a or the component B is 20 to 100 parts.
In one embodiment of the present invention, the organic solvent comprises at least one of chlorotrifluoropropene, bromotrifluoropropene, hexafluorobutene and dichloromethane.
The boiling points of the monochlorotrifluoropropene, the monobromotrifluoropropene, the hexafluorobutene and the dichloromethane are all between 20 and 40 ℃. The organic solvent is used as a viscosity reducer for reducing the viscosity of the system; on the other hand, the foaming agent is used for improving the foaming ratio of the system.
In one embodiment of the present invention, the heat-insulating flame-retardant filler includes at least one of silica-based aerogel powder, hollow glass beads, and glass short fibers.
In one embodiment of the present invention, the heat-insulating flame-retardant filler includes at least one of hollow glass micro beads having a thermal conductivity of 0.05 to 0.15W/m.k and silicon-based aerogel powder having a thermal conductivity of 0.013 to 0.050W/m.k.
In one embodiment of the invention, the mass ratio of the component A to the component B is 0.2: 1 to 5: 1.
In one embodiment of the present invention, the catalyst comprises at least one of dibutyltin dilaurate, stannous octoate, tertiary amine catalysts, and quaternary amine catalysts.
In one embodiment of the present invention, the foam stabilizer is a rigid foam silicone oil.
The hard foam silicone oil is selected from at least one of CGY-1 and CGY-5 in the chemical industry of New morning.
The invention also discloses a battery pack, which comprises the heat-insulating flame-retardant material as claimed in any one of claims 1 to 7, wherein the heat-insulating flame-retardant material is placed in the battery pack which is replaced by inert gas for foaming and curing for 5 to 60 minutes.
The foaming process comprises the following specific steps: respectively taking the uniformly mixed component A and component B according to the mass ratio, uniformly mixing the component A and the component B, then placing the mixture into a battery pack which is replaced by inert gas, and naturally foaming at room temperature.
During the foaming, thermal-insulated flame retardant material can fill the space of battery package automatically, and after the solidification, thermal-insulated flame retardant material in the space can regard as the buffer on the one hand, is favorable to reducing the influence of vibrations to the battery module in the battery package, and on the other hand is favorable to the parts that generate heat in the all-round parcel battery package, can play fire-retardant or delay the effect that the intensity of a fire spreads when the high temperature.
In addition, due to the existence of the high-content filler, the strength of the material is low, and the disassembly of the battery pack during maintenance is facilitated.
In one embodiment of the present invention, the inert gas comprises at least one of nitrogen, argon, carbon dioxide and helium.
The invention also discloses a preparation method of the heat-insulating flame-retardant material, which comprises the following steps:
a. taking the component A and the component B according to the mass ratio, and stirring the components respectively;
b. uniformly mixing the component A and the component B to obtain a mixture;
c. and c, placing the mixture obtained in the step b into a container for foaming, and curing for 5-60 minutes.
In step a, stirring each means stirring component a and component B separately.
The container is a device for containing the mixture in the step b when the heat-insulating flame-retardant material is prepared, and the specific structure of the container depends on the application scene of the heat-insulating flame-retardant material; for example, when the heat insulating and flame retardant material is applied to a battery pack, the container may be a battery case.
In one embodiment of the invention, the stirring is performed by a stirrer in the step a, the rotation speed of the stirrer is 200 to 2000r/min, and the stirring time is 0.5 to 5 hours.
In one embodiment of the invention, the stirring is performed by a stirrer in the step a, the rotation speed of the stirrer is 300 to 1500r/min, and the stirring time is 0.5 to 2 hours.
In one embodiment of the present invention, the foaming condition is room temperature natural foaming; the curing time is 10-30 minutes.
The invention has the beneficial effects that:
the heat-insulating flame-retardant material disclosed by the invention improves the heat-insulating flame-retardant performance by improving the proportion of the filler, and simultaneously solves the problem of viscosity increase caused by improving the proportion of the filler by using the organic solvent. In addition, the organic solvent adopted by the invention can also obviously improve the foaming times and further improve the heat-insulating flame-retardant property of the heat-insulating flame-retardant material.
After the heat-insulating flame-retardant material is applied to the battery pack, the influence of vibration on the battery module or the battery pack is reduced, and the heat-insulating flame-retardant material can play a role in retarding flame or delaying the spread of fire when the temperature of a heating component is too high.
Detailed Description
The following specific examples describe the present invention in detail, however, the present invention is not limited to the following examples.
Example 1:
the embodiment discloses a heat-insulating flame-retardant material, which is prepared by compounding a component A and a component B, wherein:
the component A is an isocyanic acid blocked polymer with NCO content of 20 percent;
the component B comprises the following compounds in parts by weight:
wherein the hard foam silicone oil adopts CGY-1 of the Xinchen chemical industry; the flame-retardant polyol is RAYNOL PF-1205 of Qingdao Ruinoo chemical Co., Ltd; selecting hollow glass microspheres with the thermal conductivity coefficient of 0.08W/m.k; the mass ratio of the component A to the component B is 0.1: 1.
The viscosity of component A was 200cps/25 ℃ and the viscosity of component B was 200cps/25 ℃.
The preparation method of the heat-insulating flame-retardant material comprises the following steps:
a. taking the component A and the component B according to the mass ratio, and carrying out compound stirring on the compound of the component B by using a stirrer, wherein the rotating speed of the stirrer is 200r/min, and the stirring time is 5 hours;
b. uniformly mixing the component A and the component B according to the ratio of 0.1: 1 to obtain a mixture;
c. placing the mixture obtained in the step b into a container which is replaced by argon gas for foaming and curing for 10 minutes.
In this embodiment, the container is a battery pack.
The detection shows that the mass percentage of the inorganic filler in the cured heat-insulating flame-retardant material is 8.2%, the foaming ratio of the cured heat-insulating flame-retardant material is 5, the tensile strength is 20MPa, the thermal conductivity is 0.05W/m.k, and the flame retardant grade is UL 94V-0.
Example 2:
the embodiment discloses a heat-insulating flame-retardant material, which is prepared by compounding a component A and a component B, wherein:
the component A is an isocyanic acid blocked polymer with NCO content of 40 percent;
the component B comprises the following compounds in parts by weight:
wherein the hard foam silicone oil adopts CGY-1 of the Xinchen chemical industry; the flame-retardant polyol is RAYNOL PF-2605 of Qingdao Ruinoo chemical Co., Ltd; selecting hollow glass beads with the thermal conductivity coefficient of 0.05W/m.k; the mass ratio of the component A to the component B is 10: 1.
The viscosity of component A was 150cps/25 ℃ and the viscosity of component B was 250cps/25 ℃.
The preparation method of the heat-insulating flame-retardant material comprises the following steps:
a. taking the component A and the component B according to the mass ratio, and carrying out compound stirring on the compound of the component B by using a stirrer, wherein the rotating speed of the stirrer is 300r/min, and the stirring time is 5 hours;
b. uniformly mixing the component A and the component B according to the proportion of 10: 1 to obtain a mixture;
c. placing the mixture obtained in the step b in a container which is replaced by nitrogen for foaming and curing for 5 minutes.
In this embodiment, the container is a battery pack.
The detection shows that the mass ratio of the inorganic filler in the cured heat-insulating flame-retardant material is 6.0%, the foaming ratio of the cured heat-insulating flame-retardant material is 8, the tensile strength is 22MPa, the thermal conductivity is 0.04W/m.k, and the flame retardant grade is UL 94V-0.
Example 3:
the embodiment discloses a heat-insulating flame-retardant material, which is prepared by compounding a component A and a component B, wherein:
the component A is an isocyanic acid blocked polymer with NCO content of 30 percent;
the component B comprises the following compounds in parts by weight:
wherein the hard foam silicone oil adopts CGY-5 of the Xinchen chemical industry; the flame-retardant polyol is WANOL FR-212 of Wanhua chemical group GmbH; selecting hollow glass beads with the thermal conductivity coefficient of 0.15W/m.k; the mass ratio of the component A to the component B is 5: 1.
The viscosity of component A was 150cps/25 ℃ and the viscosity of component B was 250cps/25 ℃.
The preparation method of the heat-insulating flame-retardant material comprises the following steps:
a. taking the component A and the component B according to the mass ratio, and carrying out compound stirring on the compound of the component B by using a stirrer, wherein the rotating speed of the stirrer is 1000r/min, and the stirring time is 1 hour;
b. uniformly mixing the component A and the component B according to the proportion of 5: 1 to obtain a mixture;
c. placing the mixture obtained in the step b in a container which is replaced by carbon dioxide for foaming and curing for 20 minutes.
In this embodiment, the container is a battery pack.
The detection shows that the mass ratio of the inorganic filler in the cured heat-insulating flame-retardant material is 12.1%, the foaming ratio of the cured heat-insulating flame-retardant material is 4, the tensile strength is 18MPa, the thermal conductivity is 0.05W/m.k, and the flame retardant grade is UL 94V-0.
Example 4:
the embodiment discloses a heat-insulating flame-retardant material, which is prepared by compounding a component A and a component B, wherein:
the component A comprises the following compounds in parts by weight:
10 parts of an isocyanate-terminated polymer having an NCO content of 10%
Hexafluorobutene 40 parts
Aerogel powder 1 part
The component B comprises the following compounds in parts by weight:
10 portions of flame-retardant polyol
0.1 portion of triethanolamine
0.1 part of rigid foam silicone oil
The viscosity of component A was 200cps/25 ℃ and the viscosity of component B was 250cps/25 ℃.
The preparation method of the heat-insulating flame-retardant material comprises the following steps:
a. taking the component A and the component B according to the mass ratio, and carrying out compound stirring on the compound of the component B by using a stirrer, wherein the rotating speed of the stirrer is 2000r/min, and the stirring time is 0.5 hour;
b. uniformly mixing the component A and the component B according to the ratio of 0.2: 1 to obtain a mixture;
c. placing the mixture obtained in the step b into a container which is replaced by argon gas for foaming and curing for 60 minutes.
In this embodiment, the container is a battery pack.
The detection shows that the mass ratio of the inorganic filler in the cured heat-insulating flame-retardant material is 1.5%, the foaming ratio of the cured heat-insulating flame-retardant material is 20, the tensile strength is 30MPa, the thermal conductivity is 0.01W/m.k, and the flame retardant grade is UL 94V-0.
Example 5:
the embodiment discloses a heat-insulating flame-retardant material, which is prepared by compounding a component A and a component B, wherein:
the component A comprises the following compounds in parts by weight:
50 parts of an isocyanate-terminated polymer having an NCO content of 35%
Hexafluorobutene 90 parts
100 parts of aerogel powder
The component B comprises the following compounds in parts by weight:
50 parts of flame-retardant polyol
Triethylamine 0.5 part
1 part of rigid foam silicone oil
Wherein the hard foam silicone oil adopts CGY-5 of the Xinchen chemical industry; the flame-retardant polyol is WANOL FR-130 of Wanhua chemical group GmbH; the aerogel powder is silicon-based aerogel powder with the thermal conductivity coefficient of 0.050W/m.k; the mass ratio of the component A to the component B is 5: 1.
The viscosity of component A was 300cps/25 ℃ and the viscosity of component B was 200cps/25 ℃.
The preparation method of the heat-insulating flame-retardant material comprises the following steps:
a. taking the component A and the component B according to the mass ratio, and carrying out compound stirring on the compound of the component B by using a stirrer, wherein the rotating speed of the stirrer is 1500r/min, and the stirring time is 0.5 hour;
b. uniformly mixing the component A and the component B according to the proportion of 5: 1 to obtain a mixture;
c. and c, placing the mixture obtained in the step b in a container which is replaced by helium gas for foaming and curing for 30 minutes.
In this embodiment, the container is a battery pack.
The detection shows that the mass ratio of the inorganic filler in the cured heat-insulating flame-retardant material is 55.5%, the foaming ratio of the cured heat-insulating flame-retardant material is 2, the tensile strength is 10MPa, the thermal conductivity is 0.03W/m.k, and the flame retardant grade is UL 94V-0.
Example 6:
the embodiment discloses a heat-insulating flame-retardant material, which is prepared by compounding a component A and a component B, wherein:
the component A comprises the following compounds in parts by weight:
30 parts of an isocyanate-terminated polymer having an NCO content of 30%
50 parts of bromotrifluoropropene
Short glass fiber 80 parts
The component B comprises the following compounds in parts by weight:
30 parts of flame-retardant polyol
Triethylamine 0.3 part
0.5 part of rigid foam silicone oil
Wherein the hard foam silicone oil adopts CGY-5 of the Xinchen chemical industry; the flame-retardant polyol is WANOL FR-2026 of Wanhua chemical group GmbH; the mass ratio of the component A to the component B is 3: 4.
The viscosity of component A was 100cps/25 ℃ and the viscosity of component B was 100cps/25 ℃.
The preparation method of the heat-insulating flame-retardant material comprises the following steps:
a. taking the component A and the component B according to the mass ratio, and carrying out compound stirring on the compound of the component B by using a stirrer, wherein the rotating speed of the stirrer is 1000r/min, and the stirring time is 2 hours;
b. uniformly mixing the component A and the component B according to the ratio of 3: 4 to obtain a mixture;
c. placing the mixture obtained in the step b in a container which is replaced by nitrogen for foaming and curing for 20 minutes.
In this embodiment, the container is a battery pack.
The detection shows that the mass percentage of the inorganic filler in the cured heat-insulating flame-retardant material is 31.1 percent, the foaming ratio of the cured heat-insulating flame-retardant material is 3, the tensile strength is 15MPa, the thermal conductivity is 0.08W/m.k, and the flame retardant grade is UL 94V-0.
Example 7
The embodiment discloses a heat-insulating flame-retardant material, which is prepared by compounding a component A and a component B, wherein:
the component A is an isocyanic acid blocked polymer with NCO content of 30 percent;
the component B comprises the following compounds in parts by weight:
wherein the hard foam silicone oil adopts CGY-1 of the Xinchen chemical industry; the flame-retardant polyol is RAYNOL PF-1205 of Qingdao Ruinoo chemical Co., Ltd; selecting silicon-based aerogel powder with the thermal conductivity coefficient of 0.05W/m.k; the mass ratio of the component A to the component B is 1: 5.
The viscosity of component A was 200cps/25 ℃ and the viscosity of component B was 230cps/25 ℃.
The preparation method of the heat-insulating flame-retardant material comprises the following steps:
a. taking the component A and the component B according to the mass ratio, and carrying out compound stirring on the compound of the component B by using a stirrer, wherein the rotating speed of the stirrer is 200r/min, and the stirring time is 5 hours;
b. uniformly mixing the component A and the component B according to the proportion of 1: 5 to obtain a mixture;
c. placing the mixture obtained in the step b into a container which is replaced by argon gas for foaming and curing for 10 minutes.
In this embodiment, the container is a battery pack.
The detection shows that the mass percentage of the inorganic filler in the cured heat-insulating flame-retardant material is 23.8%, the foaming ratio of the cured heat-insulating flame-retardant material is 3, the tensile strength is 16MPa, the thermal conductivity is 0.05W/m.k, and the flame retardant grade is UL 94V-0.
Example 8:
the embodiment discloses a heat-insulating flame-retardant material, which is prepared by compounding a component A and a component B, wherein:
the component A comprises the following compounds in parts by weight:
30 parts of an isocyanate-terminated polymer having an NCO content of 30%
30 parts of bromotrifluoropropene
50 portions of glass short fiber
The component B comprises the following compounds in parts by weight:
30 parts of flame-retardant polyol
Triethylamine 0.3 part
0.5 part of rigid foam silicone oil
The preparation method of the heat-insulating flame-retardant material comprises the following steps:
a. taking the component A and the component B according to the mass ratio, and carrying out compound stirring on the compound of the component B by using a stirrer, wherein the rotating speed of the stirrer is 1000r/min, and the stirring time is 2 hours;
b. uniformly mixing the component A and the component B according to the proportion of 5: 1 to obtain a mixture;
c. placing the mixture obtained in the step b in a container which is replaced by nitrogen for foaming and curing for 20 minutes.
In this embodiment, the container is a battery pack.
The detection shows that the mass percentage of the inorganic filler in the cured heat-insulating flame-retardant material is 52.0 percent, the foaming ratio of the cured heat-insulating flame-retardant material is 2, the tensile strength is 12MPa, the thermal conductivity is 0.08W/m.k, and the flame retardant grade is UL 94V-0.
Comparative example 1:
the comparative example discloses a heat-insulating flame-retardant material which is prepared by compounding a component A and a component B, wherein:
the component A is an isocyanic acid blocked polymer with NCO content of 30 percent;
the component B comprises the following compounds in parts by weight:
the viscosity of the component A is 200cps/25 deg.C, and the viscosity of the component B is 10000cps/25 deg.C.
The preparation method of the heat-insulating flame-retardant material comprises the following steps:
a. taking the component A and the component B, and carrying out compound stirring on the compound of the component B by using a stirrer, wherein the rotating speed of the stirrer is 1500r/min, and the stirring time is 2 hours;
b. uniformly mixing the component A and the component B according to the proportion of 4: 3;
c. placing the mixture obtained in the step b into a container which is replaced by argon gas for foaming and curing for 10 minutes.
In this embodiment, the container is a battery pack.
The detection shows that the mass percentage of the inorganic filler in the cured heat-insulating flame-retardant material is 6.0 percent, the foaming ratio of the cured heat-insulating flame-retardant material is 1, the tensile strength is 20MPa, the thermal conductivity is 0.05W/m.k, and the flame-retardant grade is combustible.
Compared with the comparative example 1, the organic solvent added in the examples 1 to 6 provided by the invention obviously reduces the system viscosity of the compound, and obviously improves the foaming multiple of the material; in addition, the flame retardant rating also varied significantly.
Comparative example 2
The comparative example discloses a heat-insulating flame-retardant material which is prepared by compounding a component A and a component B, wherein:
the component A is an isocyanic acid blocked polymer with NCO content of 30 percent;
the component B comprises the following compounds in parts by weight:
the viscosity of the A component is 200cps/25 deg.C, and the viscosity of the B component is 300cps/25 deg.C.
The preparation method of the heat-insulating flame-retardant material comprises the following steps:
a. taking the component A and the component B, and carrying out compound stirring on the compound of the component B by using a stirrer, wherein the rotating speed of the stirrer is 500r/min, and the stirring time is 0.5 hour;
b. uniformly mixing the component A and the component B according to the proportion of 3: 4;
c. placing the mixture obtained in the step b into a container which is replaced by argon gas for foaming and curing for 10 minutes.
In this embodiment, the container is a battery pack.
Through detection, the foaming times of the cured heat-insulating flame-retardant material are 20, the tensile strength is 35MPa, the thermal conductivity is 0.03W/m.k, and the flame-retardant grade is combustible.
The fillers added in examples 1-6 significantly reduced the tensile strength of the material compared to comparative example 2; in addition, the flame retardant rating also varied significantly. The thermal conductivity of the material in comparative example 2 is not much different from that of examples 1 to 6, mainly because comparative example 2 contains no filler and has a high expansion ratio; the material with the filler added had lower thermal conductivity than example 4 at the same expansion ratio.
The above description is only for some embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. The protection scope of the present invention is subject to the protection scope of the claims.
Claims (12)
1. A heat-insulating flame-retardant material comprises a component A and a component B, and is characterized in that the mass ratio of the component A to the component B is 0.1: 1-10: 1;
the component A comprises an isocyanic acid-terminated polymer,
the component B comprises the following compounds in parts by weight:
alternatively, the first and second electrodes may be,
the component A comprises the following compounds in parts by weight:
10-50 parts of isocyanic acid blocked polymer
40-90 parts of organic solvent
1 to 100 parts of filler
The component B comprises the following compounds in parts by weight:
10-50 parts of polyol
0.1 to 0.5 portion of catalyst
0.1-1 part of foam stabilizer
The content of NCO in the isocyanate-terminated polymer is 10% -40%, the polyol is flame-retardant polyol, the organic solvent is non-flammable low-boiling-point solvent, the filler is a heat-insulating flame-retardant filler, and the catalyst comprises at least one of organic tin catalysts or amine catalysts.
2. A heat insulating and fire retardant material as claimed in claim 1, wherein: the weight part of the filler in the component A or the component B is 20-100 parts.
3. A heat insulating and fire retardant material as claimed in claim 1, wherein: the organic solvent includes at least one of chlorotrifluoropropene, bromotrifluoropropene, hexafluorobutene, and dichloromethane.
4. A heat insulating and fire retardant material as claimed in claim 1, wherein: the heat-insulating flame-retardant filler comprises at least one of silicon-based aerogel powder, hollow glass beads and glass short fibers.
5. A heat insulating and fire retardant material as claimed in claim 1, wherein: the heat-insulating flame-retardant filler comprises at least one of hollow glass microspheres with a heat conductivity coefficient of 0.05-0.15W/m.k and silicon-based aerogel powder with a heat conductivity coefficient of 0.013-0.050W/m.k.
6. A heat insulating and fire retardant material as claimed in claim 1, wherein: the mass ratio of the component A to the component B is 0.2: 1-5: 1.
7. A heat insulating and fire retardant material as claimed in claim 1, wherein: the catalyst comprises at least one of dibutyltin dilaurate, stannous octoate, tertiary amine catalysts and quaternary amine catalysts.
8. A heat insulating and fire retardant material as claimed in claim 1, wherein: the foam stabilizer is rigid foam silicone oil.
9. A method for preparing a heat-insulating flame-retardant material according to any of claims 1 to 8, characterized by comprising the following steps:
a. taking the component A and the component B according to the mass ratio, and stirring the components respectively;
b. uniformly mixing the component A and the component B;
c. and c, placing the mixture obtained in the step b into a container for foaming, and curing for 5-60 minutes.
10. The method of claim 9, wherein: and a stirrer is adopted for stirring in the step a, the rotating speed of the stirrer is 200-2000 r/min, and the stirring time is 0.5-5 hours.
11. The method of claim 9, wherein: the foaming condition is room temperature natural foaming; the curing time is 10-30 minutes.
12. A battery pack comprising the heat insulating flame retardant material as claimed in any one of claims 1 to 8.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112853760A (en) * | 2021-01-12 | 2021-05-28 | 江苏中迪新材料技术有限公司 | Fireproof heat insulation felt, preparation method thereof, battery module and battery pack |
| WO2022188050A1 (en) * | 2021-03-10 | 2022-09-15 | Dow Global Technologies Llc | Polyurethane foam composition and use of same for potting products |
| CN115368527A (en) * | 2022-08-15 | 2022-11-22 | 惠州亿纬锂能股份有限公司 | Polyurethane foam material for cylindrical battery module and preparation method and application thereof |
| CN116410650A (en) * | 2021-12-29 | 2023-07-11 | 湖州欧美化学有限公司 | Thermosetting coating, preparation method of thermosetting coating and thermosetting coating |
| CN115368527B (en) * | 2022-08-15 | 2024-05-03 | 惠州亿纬锂能股份有限公司 | Polyurethane foam material for cylindrical battery module and preparation method and application thereof |
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| CN107325247A (en) * | 2017-07-04 | 2017-11-07 | 扬中市天正合成材料研究中心 | A kind of secondary battery jar assembly polyurethane rings environment friendly flame-retardant expanded material and preparation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107325247A (en) * | 2017-07-04 | 2017-11-07 | 扬中市天正合成材料研究中心 | A kind of secondary battery jar assembly polyurethane rings environment friendly flame-retardant expanded material and preparation method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112853760A (en) * | 2021-01-12 | 2021-05-28 | 江苏中迪新材料技术有限公司 | Fireproof heat insulation felt, preparation method thereof, battery module and battery pack |
| CN112853760B (en) * | 2021-01-12 | 2022-12-09 | 江苏中迪新材料技术有限公司 | Fireproof heat insulation felt, preparation method thereof, battery module and battery pack |
| WO2022188050A1 (en) * | 2021-03-10 | 2022-09-15 | Dow Global Technologies Llc | Polyurethane foam composition and use of same for potting products |
| CN116410650A (en) * | 2021-12-29 | 2023-07-11 | 湖州欧美化学有限公司 | Thermosetting coating, preparation method of thermosetting coating and thermosetting coating |
| CN115368527A (en) * | 2022-08-15 | 2022-11-22 | 惠州亿纬锂能股份有限公司 | Polyurethane foam material for cylindrical battery module and preparation method and application thereof |
| CN115368527B (en) * | 2022-08-15 | 2024-05-03 | 惠州亿纬锂能股份有限公司 | Polyurethane foam material for cylindrical battery module and preparation method and application thereof |
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