High hardness fluorubber material with low-temperature pliability

Abstract

The invention discloses a fluorubber sizing with low temperature pliability and high hardness, which concludes 80-100% fluoride olefin terpolymer, 1-8% activated magnesium oxide, 1-10% superfine calvital, 0.1-3.0% phenmethyl triphenyl phosphoric chloride / Dbu, 0.5-5% fluorine wax / parting medium, 10-50% strengthening agent, 1-5% promoting agent, 1.5-5.0% bisphenol AF, 5-20% plasticizer, 0.1-1.0% peroxide and 0.15-1.5% cross bonding accessory ingredient.

Description

Technical field: [0001] The invention relates to a fluorine rubber compound, in particular to a high hardness fluorine rubber compound with low temperature flexibility. Background technique: [0002] Fluorine rubber refers to a synthetic polymer elastomer with fluorine atoms connected to the carbon atoms of the main chain or side chain. Compared with other rubbers, fluorine rubber has excellent high temperature resistance, oil resistance and corrosion resistance of various chemicals. , so it is widely used in cutting-edge science and technology fields such as aviation, missiles, rockets, and space navigation. The special properties of fluororubber are determined by the structural characteristics of fluorine atoms in its molecules, but it is precisely because of this structure that it also gives Fluorine rubber has brought disadvantages, such as poor elasticity, poor low temperature performance, etc. The low temperature resistance of rubber is related to its molecular structu...

AI Technical Summary

Problems solved by technology

[0002] Fluorine rubber refers to a synthetic polymer elastomer with fluorine atoms connected to the carbon atoms of the main chain or side chain. Compared with other rubbers, fluorine rubber has excellent high temperature resistance, oil resistance and corrosion resistance of various chemicals. , so it is widely used in cutting-edge science and technology fields such as aviation, missiles, rockets, and space navigation. The special properties of fluororubber are determined by the structural characteristics of fluorine atoms in its molecules, but it is precisely because of this structure that it also gives Fluorine rubber has brought disadvantages, such as poor elasticity, poor low temperature performance, etc. The low temperature resistance of rubber is related to its molecular structure. Usually, rubber with double bonds and ether bond structures in the main chain has good low temperature resistance, while The main chain does not contain a double bond structure, and the rubber containing polar groups on the side chain has the worst low temperature resistance. Fluorine rubber belongs to the second molecular structure. Due to the extremely high electronegativity, it has a strong shielding effect on the carbon-carbon main bond of the polymer, making it have excellent high temperature resistance and medium resistance stability, but the existence of fluorine atoms also reduces the flexibility and rigidity of the entire macromolecular chain. In order to improve the low temperature performance of fluorine rubber, fluoroether rubber was synthesized abroad in the early 1970s, and perfluoroalkyl vinyl ethers containing ether bond monomers were introduced into the macromolecular structure , improve the flexibility of the polymer macromolecular chain, and the low-temperature performance is significantly improved, but because the synthesis process of perfluoroether fluororubber is extremely complicated and the production cost is too high, it is impossible to completely replace the existing ordinary fluororubber varieties. In this way, it is extremely necessary to improve the low temperature performance of ordinary fluorine rubber to meet the needs of various industries