Anti-deformation fluororubber as well as preparation method and application thereof

Abstract

The invention discloses anti-deformation fluororubber as well as a preparation method and application thereof, and belongs to the technical field of rubber and plastic sealing. The anti-deformation fluororubber comprises the following preparation raw materials in parts by weight: 100 parts of fluoroperoxide rubber, 3 parts of metal oxide, 0-20 parts of a first filler, 10-25 parts of a second filler, 0-3 parts of a processing aid, 1.0-3.0 parts of peroxide and 2.4-3.0 parts of a cross-linking agent, wherein the second filler is a layered filler. Through adjustment of a filler network, the fluororubber is filled with the layered filler with good rigidity and high radius-thickness ratio, so that the deformation-resistant fluororubber obtains excellent dimensional stability under the synergistic supporting action of a cross-linked network and the filler network, and is suitable for thin products within 1mm; therefore, the deformation capability of thin products in the online assembly, storage and transportation processes is solved, and meanwhile, six function tests required by the power battery sealing element can be met.

Description

technical field [0001] The invention belongs to the technical field of rubber and plastic seals, and in particular relates to a deformation-resistant fluororubber and its preparation method and application. Background technique [0002] The cost of power batteries for new energy vehicles includes material costs, energy costs, labor costs, and manufacturing costs, of which material costs account for more than 80%. With the continuous decline in cost, the thickness of power battery sealing components has gradually decreased from more than 2mm to less than 1mm, the outer diameter of the product has remained basically unchanged, and the diameter and thickness have dropped to less than 40% of the original. Deformation is very easy to occur during batch manufacturing, packaging, and transportation, which leads to jamming, lack of continuity, and lack of fluency on the automatic assembly line due to factors such as deformation and warping of the seal when it is transported to the a...

AI Technical Summary

Problems solved by technology

Generally, the method of increasing hardness and constant elongation strength is used to improve the anti-deformation ability of seals, which is often impossible to achieve in the 70% fluorine content of peroxygen vulcanized fluorine rubber used in power battery seals.

On the one hand, the monomer content of the cross-linking point of this type of fluororubber is fixed, and the degree of cross-linking cannot be further improved by increasing the amount of peroxide and additives.

Using the method of increasing the hardness to improve the anti-deformation ability of the seal often brings disadvantages such as a decrease in the rubber content, poor compression performance, inability to adapt to a wide range of compression deformation, and inability to meet the 15-year continuous working life.

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