CN111269511A - Insulating fluororubber material for sealing lithium battery and preparation method thereof - Google Patents
Insulating fluororubber material for sealing lithium battery and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an insulating fluororubber material for sealing a lithium battery and a preparation method thereof, wherein the insulating fluororubber material comprises the following components in parts by weight: 100 parts of fluororubber, 5-15 parts of insulating material, 12-30 parts of reinforcing filler, 0.75-2.5 parts of peroxide vulcanizing agent, 1.5-3 parts of vulcanizing assistant and 0.8-6 parts of processing assistant. The fluororubber material of the inventionThe material has excellent electrolyte resistance, and the volume expansion is less than 35 percent and the mass expansion is less than 20 percent after the material is soaked in the electrolyte. Meanwhile, the material has good insulating property, and the volume resistance of the material is 2 multiplied by 1012The volume resistance is more than 1000M omega (1000V voltage, delay reading is 3 seconds for test) after the sealing material of the lithium battery is assembled, and the high-temperature compression permanent deformation is less than 20% (200 ℃ C. 70h), thereby meeting the sealing and insulating requirements of the lithium ion battery.
Description
Technical Field
The invention belongs to the technical field of battery sealing materials, and particularly relates to an insulating fluororubber material for sealing a lithium battery and a preparation method thereof.
Background
The electrolyte is an important component of the lithium battery, and the rubber sealing ring of the electrolyte obviously plays a non-negligible role. The electrolyte has complex components, so the requirement on the material of the sealing ring is very high. At present, the materials of the sealing ring mainly comprise nitrile rubber, perfluoroether rubber, C-type fluororubber, silicone rubber and ethylene propylene diene monomer rubber. The nitrile rubber is mainly used for oil seal products, has limited high temperature resistance and cannot withstand the processing technology of a lithium battery cover plate; the perfluoroether rubber has high reliability, but is very expensive, so that the popularization of the lithium battery is not facilitated; the silicon rubber has good high and low temperature resistance, but the medium resistance is poor, so that the silicon rubber cannot adapt to the electrolyte environment; the ethylene propylene diene monomer has good tolerance to electrolyte, but cannot resist the high temperature of more than 300 ℃, and cannot meet the assembly requirement of the lithium battery cover plate. At present, peroxide vulcanized fluororubber is increasingly applied to end face sealing of lithium battery electrolyte, but the peroxide vulcanized fluororubber has poor processing technology and is easy to pollute a mould. The fluororubber has higher Mooney property, and the banburying equipment needs special equipment, which puts certain requirements on the banburying process; the good dispersion is realized under the condition of higher Mooney viscosity, and the demolding difficulty of the back-stage molding process is reduced, so that the specific banburying process needs to be researched.
The patent application No. 201210192295.8 discloses a silicone rubber insulating fluororubber cable material and a preparation method thereof, which take silicone rubber as a substrate and assist polytetrafluoroethylene plastics, and the silicone rubber insulating fluororubber cable material has excellent electrical property, is environment-friendly and wear-resistant, but the silicone rubber has poor medium resistance and cannot meet the requirement of electrolyte resistance.
The patent application number is 201220402359.8 "a fluoroplastic insulating fluororubber sheathed cable", takes fluororubber as the main material, and it has characteristics such as fine high temperature resistant, resistant oil, tear-resistant, nevertheless because of adding the shielding body, its volume resistance can't satisfy lithium cell sealing member requirement.
Disclosure of Invention
The invention aims to provide an insulating fluororubber material for lithium battery sealing and a preparation method thereof, so as to improve the sealing performance and the insulating performance of a lithium battery sealing material.
Therefore, the invention provides an insulating fluororubber material for sealing a lithium battery, which comprises the following components in parts by weight: 100 parts of fluororubber, 5-15 parts of insulating material, 12-30 parts of reinforcing filler, 0.75-2.5 parts of peroxide vulcanizing agent, 1.5-3 parts of vulcanizing assistant and 0.8-6 parts of processing assistant.
Preferably, the fluororubber is a peroxide-cured fluororubber having a Mooney viscosity of 23 to 28 and a fluorine content of > 69.8%.
Preferably, the insulating material is white carbon black and/or barium sulfate.
Preferably, the content of silicon dioxide in the white carbon black is 40-60%, and the content of effective components in the barium sulfate is more than 99%.
Preferably, the processing aid is at least one of a condensation product of a fatty acid derivative and silicone, palm wax, and stearic acid; when the processing aid contains two components, the mass ratio of the two components is (1-3): 3.
preferably, the peroxide vulcanizing agent is at least one of dicumyl peroxide, 1, 3-bis (tert-butylperoxyisopropyl) benzene and 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane; when the peroxide vulcanizing agent contains two components, the mass ratio of the two components is (2-7): 1.
Preferably, the vulcanization aid is at least one of trimethylolpropane trimethacrylate and triallyl isocyanurate; when the peroxide vulcanizing agent contains two components, the mass ratio of the two components is (5-8): 1.
The preparation method of the insulating fluororubber material for sealing the lithium battery comprises the following steps:
(1) putting the fluororubber into an internal mixer for plastication, and then sequentially adding the reinforcing filler, the vulcanization aid and part of the processing aid for mixing; discharging rubber at the temperature of not higher than 120 ℃, then packaging a triangular bag on an open mill, turning the rubber for additional refining, and standing for 20-30 hours to obtain rubber compound;
(2) putting the rubber compound into an internal mixer again, and adding the rest vulcanizing agent and processing aid for mixing; and (3) after the rubber is discharged at the temperature of not higher than 90 ℃, a triangular bag is formed on an open mill, and the rubber is turned over for additional refining.
The beneficial technical effects of the invention comprise: the invention provides an insulating fluororubber material for sealing a lithium battery, a preparation method thereof and insulationThe fluororubber material comprises the following components in parts by weight: 100 parts of fluororubber, 5-15 parts of insulating material, 12-30 parts of reinforcing filler, 0.75-2.5 parts of peroxide vulcanizing agent, 1.5-3 parts of vulcanizing assistant and 0.8-6 parts of processing assistant. The fluororubber material has excellent electrolyte resistance, and the volume expansion is less than 35 percent and the mass expansion is less than 20 percent after the fluororubber material is soaked in the electrolyte. Meanwhile, the material has good insulating property, and the volume resistance of the material is 2 multiplied by 1012The volume resistance is more than 1000M omega (1000V voltage, delay reading 3 seconds test) after the sealing material of the lithium battery is assembled, and the high-temperature compression permanent deformation is less than 20% (200 ℃ C. 70h), thereby meeting the sealing and insulating requirements of the lithium battery. The insulating fluororubber material can be applied to sealing of the pole of the lithium ion battery, and the excellent medium resistance and high temperature resistance of the fluororubber material can be suitable for the electrolyte environment of the lithium ion battery. Meanwhile, the formula and the preparation process of the insulating fluororubber material provided by the invention are mainly based on the insulation resistance of the insulating fluororubber material, the filler structure is optimized, the high insulation performance of the material is ensured to a great extent, and the requirement of a lithium ion battery sealing element on the insulation performance can be completely met.
Detailed Description
The following detailed description of specific embodiments of the present invention is provided to illustrate and explain the present invention and to be understood not to limit the present invention.
The insulating fluororubber material for sealing the lithium battery comprises the following components in parts by weight: 100 parts of fluororubber, 5-15 parts of insulating material, 12-30 parts of reinforcing filler, 0.75-2.5 parts of peroxide vulcanizing agent, 1.5-3 parts of vulcanizing assistant and 0.8-6 parts of processing assistant.
The fluororubber material has excellent electrolyte resistance, and the volume expansion is less than 35 percent and the mass expansion is less than 20 percent after the fluororubber material is soaked in the electrolyte. Meanwhile, the material has good insulating property, the volume resistance of the material is more than 2 x 1012 omega cm, the volume resistance is more than 500M omega (1000V voltage test) after the material is assembled into a sealing material of a lithium battery, and the high-temperature compression permanent deformation is less than 20% (200 ℃ C. 70h), thereby meeting the sealing and insulating requirements of the lithium ion battery.
The insulating fluororubber material can be applied to sealing of the pole of the lithium ion battery, has excellent medium resistance and high temperature resistance, and is suitable for the electrolyte environment of the lithium ion battery. Meanwhile, the formula and the preparation process of the insulating fluororubber material provided by the invention are mainly based on the insulation resistance of the insulating fluororubber material, the filler structure is optimized, the high insulation performance of the material is ensured to a great extent, and the requirement of a lithium ion battery sealing element on the insulation performance can be completely met.
The insulating fluororubber material for sealing the lithium battery takes the peroxide vulcanized fluororubber as a base material, the excellent electrolyte resistance and high temperature resistance of the insulating fluororubber material meet the working condition requirements of a lithium battery sealing element in the assembling and using processes, and simultaneously, the fluororubber formula is optimized to ensure that the volume resistance of the insulating fluororubber material reaches more than the T omega level and the high temperature voltage change is less than 20 percent (200 ℃ C. 70 h); through the designed banburying process, the rear section of the mould pressing vulcanization has good demoulding effect, and the pollution of the mould is reduced.
The fluororubber is peroxide vulcanized fluororubber, the Mooney viscosity is 23-28, and the fluorine content is more than 69.8%. The fluororubber with the Mooney viscosity of 23-28 is convenient to process and form, and the fluororubber has excellent medium resistance and high temperature resistance due to the fluorine content of more than 69.8 percent, so that the fluororubber is suitable for the electrolyte environment of a lithium battery.
The insulating material is white carbon black and/or barium sulfate.
The silica content in the white carbon black is 40-60%, so that the prepared fluororubber material has proper hardness, and the processing and insulating properties are not affected by overhigh hardness of the fluororubber material.
The content of effective components in barium sulfate is more than 99 percent, so that the prepared fluororubber material has excellent medium resistance and high temperature resistance, and is suitable for the electrolyte environment of lithium batteries.
The processing aid is at least one of condensation product of fatty acid derivative and silicone, palm wax and stearic acid; when the processing aid contains two components, the mass ratio of the two components is (1-3): 3. in the invention, two or three processing aids with different components are used in a matching way, so that the fluidity of the fluororubber can be improved to the greatest extent, and the fluororubber processing is most favorably realized; meanwhile, the demolding of the fluororubber is facilitated, and the fluororubber is prevented from corroding and polluting the die; in addition, the fluororubber can be prevented from being stuck to a roller in the banburying or open mixing process.
The peroxide vulcanizing agent is at least one of dicumyl peroxide, 1, 3-bis (tert-butylperoxyisopropyl) benzene and 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane; when the peroxide vulcanizing agent contains two components, the mass ratio of the two components is (2-7): 1. In the invention, two peroxide vulcanizing agents with different components are used in a matching way, so that the best vulcanization (crosslinking) promotion effect can be achieved on the peroxide vulcanized fluororubber, and the prepared insulating fluororubber material has the best corrosion resistance and electrolyte resistance.
The vulcanizing assistant is at least one of trimethylolpropane trimethacrylate, triallylisocyanurate and N, N' -m-phenylene bismaleimide; when the vulcanization assistant contains two components, the mass ratio of the two components is (5-8): 1. In the invention, two vulcanizing auxiliaries with different components are used in a matching way, so that the best vulcanizing (crosslinking) effect can be achieved on peroxide vulcanized fluororubber, and the prepared insulating fluororubber material has the best corrosion resistance and electrolyte resistance; in addition, the two vulcanizing aids with different components are matched for use, so that different crosslinking points on a molecular chain can be fully crosslinked, the crosslinking structure of the fluororubber is reasonable, the crosslinking density is higher, the high-temperature compression permanent deformation is smaller, and the service life is longer.
The preparation method of the insulating fluororubber material for sealing the lithium battery comprises the following steps:
(1) putting the fluororubber into an internal mixer for plastication, and then sequentially adding the reinforcing filler, the vulcanization aid and part of the processing aid for mixing; discharging rubber at the temperature of not higher than 120 ℃, then packaging a triangular bag on an open mill, turning the rubber for additional refining, and standing for 20-30 hours to obtain rubber compound;
(2) putting the rubber compound into the internal mixer again, and adding the rest vulcanizing agent and processing aid for mixing; and (3) after the rubber is discharged at the temperature of not higher than 90 ℃, a triangular bag is formed on an open mill, and the rubber is turned over for additional refining. And the remilling is to turn the mixed rubber on an open mill and a rubber turning machine continuously to ensure that the rubber material is mixed more uniformly.
Example 1
The insulating fluororubber material for sealing the lithium battery comprises the following components in parts by mass: 100 parts of fluororubber, 4.5 parts of insulating filler barium sulfate, 22.5 parts of reinforcing filler carbon black, 2.5 parts of condensation product of processing aid fatty acid derivative and silicone, 1 part of processing aid palm wax, 1.5 parts of peroxide vulcanizing agent 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane, 0.3 part of peroxide vulcanizing agent dicumyl peroxide and 2.7 parts of vulcanizing aid triallyl isocyanurate.
The preparation method of the insulating fluororubber material for sealing the lithium battery comprises the following steps:
(1) putting the fluororubber into an internal mixer for plastifying to 60 ℃, then adding the reinforcing filler carbon black, carrying out internal mixing for 120 seconds, adding the insulating filler barium sulfate and the vulcanization aid triallyl isocyanurate, carrying out internal mixing for 100 seconds, and adding the processing aid palm wax for mixing; removing rubber at 110 ℃, then, beating a triangular bag on an open mill, turning the rubber, performing additional refining, and standing for 24 hours to obtain rubber compound;
(2) and (3) putting the mixed rubber into an internal mixer again, carrying out internal mixing for 60 seconds, adding a peroxide vulcanizing agent 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane, a peroxide vulcanizing agent dicumyl peroxide and a condensation product of a processing aid fatty acid derivative and silicone, discharging rubber at 90 ℃, and then, beating a triangular bag on an open mill and turning the rubber for additional mixing to obtain the insulating fluororubber.
The insulating fluororubbers of the present examples were subjected to the performance tests, and the data are shown in table 1. Wherein, the electrolyte resistance performance test: the insulating fluororubber of the embodiment is soaked in the lithium battery electrolyte at 85 ℃ for 70h, and then the volume change and the mass change of the insulating fluororubber are detected. Compression set test: the insulating fluororubber of the present example was aged at 200 ℃ for 70 hours, and then the amount of deformation of the insulating fluororubber was measured. And (3) resistance testing: the test voltage is 1000V, and the reading is delayed for 3 seconds; the volume resistance of the insulating fluororubber is the volume resistance of the insulating fluororubber in the embodiment; the volume resistance of the product is the volume resistance of the sealing material measured when the insulating fluororubber is used as the sealing material and applied to the sealing of the pole of the lithium battery to simulate the assembly environment of the lithium battery.
TABLE 1
Example 2
The insulating fluororubber material for sealing the lithium battery comprises the following components in parts by mass: 100 parts of fluororubber, 8.7 parts of insulating filler white carbon black, 20.3 parts of reinforcing filler carbon black, 1 part of processing aid stearic acid, 1.6 parts of condensation product of processing aid fatty acid derivative and silicone, 0.5 part of processing aid palm wax, 1.4 parts of peroxide vulcanizing agent 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane, 2 parts of vulcanizing aid triallyl isocyanurate and 0.3 part of vulcanizing aid N, N' -m-phenylene bismaleimide.
The preparation method of the insulating fluororubber material for sealing the lithium battery comprises the following steps:
(1) putting fluororubber into an internal mixer for plastifying to 50 ℃, then adding reinforcing filler carbon black and vulcanization aid triallyl isocyanurate, carrying out internal mixing to 75 ℃, adding insulating filler white carbon black and vulcanization aid N, N' -m-phenylene bismaleimide, carrying out internal mixing to 90 ℃, and adding processing aid stearic acid and processing aid carnauba wax for mixing; removing rubber at 120 ℃, then, beating a triangular bag on an open mill, turning the rubber, performing additional refining, and standing for 24 hours to obtain rubber compound;
(2) and (3) putting the rubber compound into an internal mixer again, carrying out internal mixing to 55 ℃, adding a peroxide vulcanizing agent 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane, a processing aid fatty acid derivative and a condensation product of silicone, discharging rubber at 90 ℃, and then, opening a triangular bag on an open mill and turning over the rubber for additional mixing to obtain the insulating fluororubber.
The insulating fluororubbers of the present examples were subjected to the performance tests, and the data are shown in table 2. Wherein, the electrolyte resistance performance test: the insulating fluororubber of the embodiment is soaked in the lithium battery electrolyte at 85 ℃ for 70h, and then the volume change and the mass change of the insulating fluororubber are detected. Compression set test: the insulating fluororubber of the present example was aged at 200 ℃ for 70 hours, and then the amount of deformation of the insulating fluororubber was measured. And (3) resistance testing: the volume resistance of the insulating fluororubber is the volume resistance of the insulating fluororubber in the embodiment; the volume resistance of the product is the volume resistance of the sealing material measured when the insulating fluororubber is used as the sealing material and applied to the sealing of the pole of the lithium battery to simulate the assembly environment of the lithium battery.
TABLE 2
Example 3
The insulating fluororubber material for sealing the lithium battery comprises the following components in parts by mass: 100 parts of fluororubber, 15 parts of insulating filler white carbon black, 15 parts of reinforcing filler carbon black, 1.5 parts of processing aid stearic acid, 1.3 parts of processing aid palm wax, 1.5 parts of peroxide vulcanizing agent dicumyl peroxide and 3.0 parts of vulcanizing aid triallyl isocyanurate.
The preparation method of the insulating fluororubber material for sealing the lithium battery comprises the following steps:
(1) adding fluororubber into an internal mixer for plastifying for 60 seconds, then adding reinforcing filler carbon black and vulcanization aid triallyl isocyanurate, and carrying out internal mixing for 120 seconds; adding insulating filler white carbon black, and banburying to 90 ℃; adding a processing aid of palm wax for mixing, carrying out lifting and cleaning for 60 seconds, then continuously banburying to 115 ℃ for rubber discharge, then beating a triangular bag on an open mill and turning rubber for complement mixing, and standing for 24 hours to obtain a rubber compound;
(2) and (3) putting the rubber compound into an internal mixer again, carrying out internal mixing for 50 seconds, adding a peroxide vulcanizing agent 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane and a processing aid stearic acid, discharging rubber at 90 ℃, and then, beating a triangular bag on an open mill and turning the rubber for additional mixing to obtain the insulating fluororubber.
The insulating fluororubbers of the present examples were subjected to the performance test, and the data are shown in table 3. Wherein, the electrolyte resistance performance test: the insulating fluororubber of the embodiment is soaked in the lithium battery electrolyte at 85 ℃ for 70h, and then the volume change and the mass change of the insulating fluororubber are detected. Compression set test: the insulating fluororubber of the present example was aged at 200 ℃ for 70 hours, and then the amount of deformation of the insulating fluororubber was measured. And (3) resistance testing: the volume resistance of the insulating fluororubber is the volume resistance of the insulating fluororubber in the embodiment; the volume resistance of the product is the volume resistance of the sealing material measured when the insulating fluororubber is used as the sealing material and applied to the sealing of the pole of the lithium battery to simulate the assembly environment of the lithium battery.
TABLE 3
Example 4
The insulating fluororubber material for sealing the lithium battery comprises the following components in parts by mass: 100 parts of fluororubber, 10 parts of insulating filler barium sulfate, 20 parts of reinforcing filler carbon black, 2 parts of condensation product of processing aid fatty acid derivative and silicone, 1.5 parts of processing aid palm wax, 1 part of peroxide vulcanizing agent 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane, 1 part of peroxide vulcanizing agent dicumyl peroxide, 2 parts of vulcanization aid triallyl isocyanurate and 0.7 part of vulcanization aid N, N' -m-phenylene bismaleimide.
The preparation method of the insulating fluororubber material for sealing the lithium battery comprises the following steps:
(1) putting the fluororubber into an internal mixer for plastifying to 60 ℃, then adding reinforcing filler carbon black and vulcanization aid N, N' -m-phenylene bismaleimide for internal mixing for 120 seconds, adding insulating filler barium sulfate and vulcanization aid triallyl isocyanurate for internal mixing for 100 seconds, and adding processing aid palm wax for mixing; removing rubber at 110 ℃, then, beating a triangular bag on an open mill, turning the rubber, performing additional refining, and standing for 24 hours to obtain rubber compound;
(2) and (3) putting the mixed rubber into an internal mixer again, carrying out internal mixing for 60 seconds, adding a peroxide vulcanizing agent 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane, a peroxide vulcanizing agent dicumyl peroxide and a condensation product of a processing aid fatty acid derivative and silicone, discharging rubber at 90 ℃, and then, beating a triangular bag on an open mill and turning the rubber for additional mixing to obtain the insulating fluororubber.
The insulating fluororubbers of the present examples were subjected to the performance test, and the data are shown in table 4. Wherein, the electrolyte resistance performance test: the insulating fluororubber of the embodiment is soaked in the lithium battery electrolyte at 85 ℃ for 70h, and then the volume change and the mass change of the insulating fluororubber are detected. Compression set test: the insulating fluororubber of the present example was aged at 200 ℃ for 70 hours, and then the amount of deformation of the insulating fluororubber was measured. And (3) resistance testing: the test voltage is 1000V, and the reading is delayed for 3 seconds; the volume resistance of the insulating fluororubber is the volume resistance of the insulating fluororubber in the embodiment; the volume resistance of the product is the volume resistance of the sealing material measured when the insulating fluororubber is used as the sealing material and applied to the sealing of the pole of the lithium battery to simulate the assembly environment of the lithium battery.
TABLE 4
From the test results in tables 1 to 4, it can be seen that the fluororubber material of the present invention has excellent electrolyte resistance, and the volume expansion after soaking in the electrolyte is less than 35%, and the mass expansion is less than 20%. Meanwhile, the material has good insulating property, the volume resistance of the material is more than 2 x 1012 omega cm, the volume resistance is more than 500M omega (1000V voltage test) after the material is assembled into a sealing material of a lithium battery, and the high-temperature compression permanent deformation is less than 20% (200 ℃ C. 70h), thereby meeting the sealing and insulating requirements of the lithium ion battery.
The insulating fluororubber material can be applied to sealing of the pole of the lithium ion battery, and the excellent medium resistance and high temperature resistance of the fluororubber material can be suitable for the electrolyte environment of the lithium ion battery. Meanwhile, the formula and the preparation process of the insulating fluororubber material provided by the invention are mainly based on the insulation resistance of the insulating fluororubber material, the filler structure is optimized, the high insulation performance of the material is ensured to a great extent, and the requirement of a lithium ion battery sealing element on the insulation performance can be completely met.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (8)
1. An insulating fluororubber material for sealing a lithium battery is characterized by comprising the following components in parts by weight:
100 parts of fluororubber, 5-15 parts of insulating material, 12-30 parts of reinforcing filler, 0.75-2.5 parts of peroxide vulcanizing agent, 1.5-3 parts of vulcanizing assistant and 0.8-6 parts of processing assistant.
2. The insulating fluororubber material for lithium battery sealing according to claim 1,
the fluororubber is peroxide vulcanized fluororubber, the Mooney viscosity of the fluororubber is 23-28, and the fluorine content of the fluororubber is more than 69.8%.
3. The insulating fluororubber material for lithium battery sealing according to claim 1,
the insulating material is white carbon black and/or barium sulfate.
4. The insulating fluororubber material for lithium battery sealing according to claim 3,
the silica content in the white carbon black is 40-60%, and the content of the effective components in the barium sulfate is more than 99%.
5. The insulating fluororubber material for lithium battery sealing according to claim 1,
the processing aid is at least one of condensation products of fatty acid derivatives and silicone, palm wax and stearic acid;
when the processing aid contains two components, the mass ratio of the two components is (1-3): 3.
6. the insulating fluororubber material for lithium battery sealing according to claim 1,
the peroxide vulcanizing agent is at least one of dicumyl peroxide, 1, 3-bis (tert-butylperoxyisopropyl) benzene and 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane;
when the peroxide vulcanizing agent contains two components, the mass ratio of the two components is (2-7): 1.
7. The insulating fluororubber material for lithium battery sealing according to claim 1,
the vulcanizing assistant is at least one of trimethylolpropane trimethacrylate and triallyl isocyanurate;
when the peroxide vulcanizing agent contains two components, the mass ratio of the two components is (5-8): 1.
8. The method for preparing an insulating fluororubber material for lithium battery sealing according to any one of claims 1 to 7,
the method comprises the following steps:
(1) putting the fluororubber into an internal mixer for plastication, and then sequentially adding the reinforcing filler, the vulcanization aid and part of the processing aid for mixing; discharging rubber at the temperature of not higher than 120 ℃, then packaging a triangular bag on an open mill, turning the rubber for additional refining, and standing for 20-30 hours to obtain rubber compound;
(2) putting the rubber compound into an internal mixer again, and adding the rest vulcanizing agent and processing aid for mixing; and (3) after the rubber is discharged at the temperature of not higher than 90 ℃, a triangular bag is formed on an open mill, and the rubber is turned over for additional refining.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112358700A (en) * | 2020-11-30 | 2021-02-12 | 中国人民解放军第五七一九工厂 | Fluororubber material and preparation method thereof |
| CN112679889A (en) * | 2020-12-24 | 2021-04-20 | 广州机械科学研究院有限公司 | Thermal-shock-resistant peroxide fluororubber for sealing power battery |
| CN112795118A (en) * | 2020-12-30 | 2021-05-14 | 广州机械科学研究院有限公司 | Insulating fluororubber material and preparation method and application thereof |
| CN113346095A (en) * | 2021-05-17 | 2021-09-03 | 上海超碳石墨烯产业技术有限公司 | Button cell with high temperature resistant system |
| CN115109357A (en) * | 2022-07-01 | 2022-09-27 | 江苏中煜橡塑科技有限公司 | Fluororubber sealing nail material for power battery plugging liquid and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112358700A (en) * | 2020-11-30 | 2021-02-12 | 中国人民解放军第五七一九工厂 | Fluororubber material and preparation method thereof |
| CN112358700B (en) * | 2020-11-30 | 2022-06-17 | 中国人民解放军第五七一九工厂 | Fluororubber material and preparation method thereof |
| CN112679889A (en) * | 2020-12-24 | 2021-04-20 | 广州机械科学研究院有限公司 | Thermal-shock-resistant peroxide fluororubber for sealing power battery |
| CN112795118A (en) * | 2020-12-30 | 2021-05-14 | 广州机械科学研究院有限公司 | Insulating fluororubber material and preparation method and application thereof |
| CN113346095A (en) * | 2021-05-17 | 2021-09-03 | 上海超碳石墨烯产业技术有限公司 | Button cell with high temperature resistant system |
| CN115109357A (en) * | 2022-07-01 | 2022-09-27 | 江苏中煜橡塑科技有限公司 | Fluororubber sealing nail material for power battery plugging liquid and preparation method thereof |
| CN115677903A (en) * | 2022-10-17 | 2023-02-03 | 浙江巨圣氟化学有限公司 | High-fluorine rubber sealing material and preparation method thereof |
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