Fluoropolymers

A small, but ultimately very important, part of the elastomer-based adhesive and sealant market is devoted to fluoropolymers. Most often processed as a solvent-based fluoro­carbon rubber mixture, these products are often used as sealants for applications requir­ing a high degree of chemical resistance, particularly where temperatures may rise above 210°C. These polymers exhibit excellent retention of elastomeric and mechanical proper­ties at elevated temperatures, with some products capable of intermittent exposure to temperatures above 315° C. Another application is as a laminating adhesive for poly — imide films for electronic components and flexible circuitry. Fluoropolymer sealants and adhesives are also used for bonding gaskets and seals in high performance aircraft and aerospace vehicles, and in a limited way in high performance automotive applications. Some forms of these products also are listed as fluorosilicones. Some curing grades of fluoropolymers are used as a splice cement in the fabrication of rubber fuel cells, in bonding and sealing tank linings, and in other rubber assemblies made of different grades of fluoropolymer.

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