An insulating and electrolyte-resistant rubber sealing material, a preparation method and application thereof

CN122080552APending Publication Date: 2026-05-26SHENZHEN BAKE COMPOUND RUBBER TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN BAKE COMPOUND RUBBER TECH CO LTD
Filing Date
2026-03-24
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing lithium battery sealing materials have low tolerance to electrolytes and are prone to deformation during long-term use, leading to electrolyte leakage and affecting battery safety and lifespan.

Method used

The material uses components such as peroxyfluorinated rubber raw rubber, insulating carbon black, modified nano calcium carbonate, acid absorbent, lubricant and peroxide vulcanizing agent, and forms a cross-linked three-dimensional network structure through specific ratios and process steps, which improves the insulation, resilience and high temperature resistance of the material.

Benefits of technology

The prepared insulating and electrolyte-resistant rubber sealing material has excellent insulation, resilience, mechanical strength and high temperature resistance, high volume resistivity, excellent tensile strength and elongation at break, and good electrolyte resistance, meeting the safety and service life requirements of lithium batteries.

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Abstract

This application relates to the technical field of rubber sealing materials, and discloses an insulating and electrolyte-resistant rubber sealing material, its preparation method, and its application. The raw material components of the insulating and electrolyte-resistant rubber sealing material of this application include: peroxyfluororubber raw rubber, insulating carbon black, modified nano-calcium carbonate, acid absorbent, lubricant, peroxide vulcanizing agent, and additives; wherein the nitrogen adsorption specific surface area of ​​the insulating carbon black is 20~60 m². 2 / g; Modified nano-calcium carbonate is obtained by surface modification treatment of nano-calcium carbonate with a particle size of 20~80nm using an aminosilane coupling agent. The preparation method of this application, through mixing, open milling and sheeting, and vulcanization, produces an insulating and electrolyte-resistant rubber sealing material with excellent insulation, resilience, mechanical strength, high temperature resistance, and electrolyte resistance, with a volume resistivity reaching up to 1.9×10⁻⁶. 15 Ω·cm, tensile strength retention rate after heat aging at 150℃ for 72h ≥92.4%.
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