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Lithium battery electrolyte solution resistant fluororubber composition and preparation method thereof

A fluororubber, lithium battery technology, applied in battery pack parts, circuits, electrical components, etc., can solve problems such as complex structure and poor bending precision

Active Publication Date: 2019-06-25
上海杜实新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of complex structure and poor bending precision of sheet metal bending devices in the prior art, the present invention provides a lithium battery electrolyte-resistant fluororubber composition

Method used

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  • Lithium battery electrolyte solution resistant fluororubber composition and preparation method thereof
  • Lithium battery electrolyte solution resistant fluororubber composition and preparation method thereof
  • Lithium battery electrolyte solution resistant fluororubber composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8

[0026] The fluororubber A in Table 1 and tetrapropylene fluororubber or fluororubber B were masticated evenly on a two-roll mill and rolled, and then the crosslinking agent DBPH50, the auxiliary crosslinking agent TAIC S70, carbon black N990 and processing aid All auxiliary materials such as agent HT290 are pre-mixed evenly, and slowly added to the open mill. After all the powdery auxiliary materials are powdered, the wrapping rubber material is cut 5 times on the left and right, and then the triangular bag is made 10 times to fully mix the rubber and auxiliary materials. Uniform, then adjust the roller distance to release the sheet, the thickness is controlled at 6mm, and the fluororubber composition compound rubber resistant to lithium battery electrolyte is obtained. The entire mixing process is controlled within 10 minutes, and the roller temperature of the mill is controlled within 80 ° C. After the prepared mixed rubber was aged for 16 hours, it was re-milled and produced...

Embodiment 2

[0030]The physical and mechanical properties of the composition of Example 2 and the changes in the electrolyte solvent can be seen, and the composition material after using 10 parts of alkali-resistant fluororubber Viton ETP600S is completely immersed in the electrolyte solvent, at room temperature and at a temperature of 40 ° C Under the same conditions, after 168 hours, the volume change has decreased, its chemical resistance has been improved, and the physical and mechanical properties of tensile strength and elongation at break have also decreased. It can be seen that the use of alkali-resistant fluororubber Viton ETP600S can improve Electrolyte solvent resistance performance of fluororubber Viton GF600S.

[0031] The physical and mechanical properties of embodiment 3 and 4 compositions and the change in electrolyte solvent can be seen, and the composition material after using alkali-resistant fluororubber Viton ETP600S and polytetrafluoroethylene micropowder Zonyl MP1400 ...

Embodiment 7

[0033] The physical and mechanical properties of the composition of Example 7 and the changes in the electrolyte solvent can be seen. The composition material of 100 parts of tetrapropylene fluororubber Aflas X600 is completely immersed in the electrolyte solvent. After 168 hours, the volume change is about 20%, but the physical and mechanical properties change more than 50% in tensile strength and hardness. The compression set rate is 40%. From the perspective of seal design, it is not suitable for this working condition. under sealing application requirements.

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Abstract

Belonging to the technical field of fluororubber compositions, the invention in particular relates to a lithium battery electrolyte solution resistant fluororubber composition and a preparation methodthereof. The composition comprises the following raw materials by weight: 10-100 parts of fluororubber A, 0-100 parts of fluororubber B, 0-100 parts of tetrafluoroethylene-propylene rubber, 0-20 parts of polytetrafluoroethylene micropowder, 1-3 parts of a cross-linking agent, 1-7 parts of an assistant cross-linking agent, 1-30 parts of filler, and 1-3 parts of a processing assistant. While maintaining the high temperature resistance and excellent mechanical properties of fluororubber compositions, the lithium battery electrolyte solution resistant fluororubber composition provided by the invention can improve the electrolyte solution resistance of fluororubber composition, has small permanent compression set, can meet the application working conditions of lithium-resistant batteries, andthe cost is relatively low.

Description

technical field [0001] The invention relates to the technical field of fluororubber compositions, in particular to a fluororubber composition resistant to lithium battery electrolyte and a preparation method thereof. Background technique [0002] Lithium battery is a high-tech product, and it is also a new type of high-capacity, long-life and environmentally friendly battery. The power lithium battery is currently the biggest bottleneck in new energy vehicle technology and cost, and the rubber seal is the most critical component of the power lithium battery in the new energy vehicle industry chain. It is used for the sealing of power lithium batteries to prevent leakage of electrolyte, avoid environmental pollution, and ensure the use environment and composition changes of electrolyte. If the sealing effect of the rubber seal is not good enough, it will cause the power lithium battery to leak, affect the use environment and composition changes of the electrolyte, and cause ...

Claims

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Application Information

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IPC IPC(8): C08L27/18C08L27/16C08K13/02C08K5/14C08K5/3492C08K3/04H01M2/08
CPCY02E60/10
Inventor 刘丽
Owner 上海杜实新材料科技有限公司
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