Abstract
Properties of sealants based on fluorosiloxane oligomers are considered. It is shown that polysibxanes containing the γ-trifluoropropyl radical can be applied in practice as the base for sealants. It is established that the flexibility of the siloxane chain is responsible for high freeze resistance, while large values of the energy of polar-Si-O-bond allow us to obtain materials with high thermal stability. Mechanical and technological properties of fluorosiloxane sealants are reported, and their advantages relative to materials on the basis of organofluoric rubbers are shown. The domains of the applicability of sealants for surface and interjoint sealing are discussed. It is shown that sealants based on fluorosiloxane oligomers are characterized by adequate stability to prolonged action of different fuels and are widely used in the aircraft construction.
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