Insulating fluororubber material as well as preparation method and application thereof

A technology of fluororubber and raw materials, which is applied in the field of insulating fluororubber materials and its preparation, can solve the problems of fluororubber materials such as increased volume swelling and decreased electrical insulation, and achieve the reduction of volume resistivity, reduction of adsorption capacity, and strengthening of bonding The effect of action

Active Publication Date: 2021-05-14
GUANGZHOU MECHANICAL ENG RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Li Shize et al. [Effect of talcum powder dosage on the viscoelastic behavior of fluororubber in hot acid environment] found that adding talc powder to fluororubber can improve the acid resistance of fluororubber, and it does not involve the problems of electrolyte and material resistance.
[0005] The power battery needs a long service life, so the life of the seal needs to be designed very long, and as time goes on, the seal will be affected by the high temperature and high humidity of the environment, as well as the erosion of the electrolyte, and the volume of the fluororubber material The swelling becomes larger, resulting in a decrease in volume electrical insulation

Method used

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  • Insulating fluororubber material as well as preparation method and application thereof

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Embodiment 1

[0037] An embodiment of an insulating fluororubber material and a preparation method of the present invention, the insulating fluororubber material includes the following preparation raw materials in parts by weight:

[0038] 100 parts of fluororubber, 5 parts of talc, 0.3 parts of di-n-butoxy bis(ethyl acetoacetate) titanate, 20 parts of N990 carbon black, 1 part of 2,5-dimethyl-2,5-di (tert-butylperoxy)hexane, 3 parts of triallyl isocyanurate, 2 parts of processing aids;

[0039] The fluororubber model is GF200S; the average particle size of the talcum powder is 1250 mesh, and the acid-soluble iron content is <0.3%.

[0040] The preparation method of the insulating fluororubber material, the specific steps are as follows:

[0041] (1) Dry the talc powder in an oven at 300°C for 1 hour; dissolve di-n-butoxy bis(ethyl acetoacetate) titanate in triallyl isocyanuric acid at a temperature of 30°C to 40°C In the ester liquid, use hydrochloric acid to adjust the pH value to 5.5-7.0...

Embodiment 2

[0045] The raw materials for the preparation of the insulating fluororubber material are the same as those in Example 1, except that the carbon black N990 in Example 1 is reduced to 15 parts, and the talcum powder is increased to 10 parts.

Embodiment 3

[0047] In addition to replacing the di-n-butoxy bis(ethyl acetoacetate) titanate in Example 1 with an equivalent amount of bis-triethanolamine diisopropyl titanate, the raw materials for the preparation of the insulating fluororubber material were Composition and preparation method are completely identical with embodiment 1.

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Abstract

The invention discloses an insulating fluororubber material as well as a preparation method and application thereof. The insulating fluororubber material comprises the following raw materials in parts by weight: 100 parts of fluororubber, 2-10 parts of a first filler, 15-20 parts of a second filler and 3 parts of a cross-linking agent, wherein the first filler is coupling agent surface modified talcum powder. ,The coupling agent surface modified talcum powder is added as the first filler, so that the combination effect between rubber and the filler is enhanced, the adsorption capacity of the filler to electrolyte and water is reduced, the insulativity of the insulating fluororubber material is improved and the problem that the volume resistivity of the material is reduced after long-term use or electrolyte soaking and high-temperature and high-humidity impact is solved.

Description

technical field [0001] The invention belongs to the field of rubber sealing products, and in particular relates to an insulating fluororubber material and a preparation method and application thereof. Background technique [0002] At present, the development of lithium-ion batteries in the world is in full swing. Because the electrolyte in lithium batteries is extremely corrosive, and peroxyfluororubber with high fluorine content has good stability in the electrolyte, high-fluorine peroxyfluororubber is generally used As a sealing material for lithium iron phosphate batteries. As a lithium iron phosphate battery sealing material, in addition to providing long-term good sealing performance, it also needs to maintain good insulation performance for a long time. [0003] However, compared with other elastomer materials, fluorine rubber has a much lower volume resistivity, especially after the temperature rises (high temperature environment in summer, heating during charging, e...

Claims

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Application Information

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IPC IPC(8): C08L27/12C08K13/06C08K9/04C08K3/34C08K3/04C08K5/14C08K5/3492H01M50/193
CPCC08K13/06C08K9/04C08K3/34C08K3/04C08K5/14C08K5/34924C08L2203/20C08K2201/005C08L27/12
Inventor 王勇肖风亮赵骏一高燕邓娟罗靖宜韦园思
Owner GUANGZHOU MECHANICAL ENG RES INST
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