Abstract: A substrate such as a fabric is coated with a blend of a fluoroelastomer and particles of polytetrafluoroethylene or similar fluorocarbon resin, preferably in colloidal form. The elastomer and polymer may be applied as a mixture in the form of a liquid or water suspension, followed by heating.

Abstract: A packing material of braided yarns is provided wherein the yarns have a glass and/or acrylic core and an outer layer of polyphenylene sulfide fibers, either alone or in combination with other unreactive fibers such as aramid, carbon or graphite fibers.

Abstract: An expansion joint for connecting a pair of adjacent ducts or the like is made up from a material having improved properties. The material comprises a sheet of knit wire covered on at least one side with a vulcanized fluoroelastomer.

Abstract: The abrasion resistance and tensile strength of asbestos is significantly improved by the addition of significant amounts of metal oxides, such as iron oxide, under conditions to provide at least some surface bonding of the oxides to the surface of the asbestos. The oxides are preferably added during formation of bodies from asbestos dispersions and also impart color to the final product.

Abstract: Ceramic fiber is co-dispersed in a liquid medium together with a heat curable organic binder, and the mixture is beaten preferably with small amounts of a crystallizable salt and fillers. Upon beating, the mixture is foamed, and the foam is then heated to cure the binder, evaporate the liquid, and stabilize the foam. The foam may be used as is, but is preferably further heated to decompose most of the organic binder and to cause bonding between intersecting fibers by the salt, thereby resulting in a stable foam that has excellent high temperature properties.

Abstract: A heat curable material in the form of a moldable and extrudable paste comprises a mixture of inorganic fibers, an elastomer, silicone resin and various optional fillers, all mixed with a suitable solvent. The material cures into a durable solid having excellent physical properties and superior thermal insulating characteristics.