Abstract: A fluoropolymer gum of 60 to 85 mol percent vinylidene fluoride, 10 to 40 mol percent of hexafluoropropene and 0.15 to 3 mol percent 1-bromo-2,2-difluoroethylene is provided which can be blended with fluorosilicone gum and vulcanized in presence of free-radical initiators to produce elastomeric vulcanizates with desired balance of chemical solvent or fluid resistance, high temperature stability, and low temperature flexibility, coupled with good physical properties such as high tensile strength and elongation.

Abstract: A composition comprising elastomeric copolymer gum of vinylidene fluoride and at least one terminally unsaturated monolefin comonomer and as a vulcanizing agent therefor a composition comprising one or a mixture of aromatic compounds having hydroxyl and oxyallyl groups directly bonded to aromatic ring-carbon atoms.

Abstract: Magnetic recording medium protected by an ultra-thin, composite low surface energy covering provided by an inner layer of insoluble polymer and an outer layer of insoluble polymer which are made by in situ polymerization. The inner layer is made from two monomers such as a hydantoin hexacrylate and alpha-methyl styrene. The outer layer is made from polymerizable perfluoropolyether monomer having ethylenicaly unsaturated polymerizable groups. The composite low surface energy covering is especially useful for providing lubricity and corrosion resistance to a metallic thin-film magnetic recording coating.

Abstract: Active hydrogen-containing fluorochemical is used as a foam stabilizer in preparing polyurethane foams. For example, rigid or flexible polyurethane foams with high or low density and uniform cellular structure are prepared using fluoroaliphatic radical-substituted poly(oxyalkylene) polyols as foam stabilizers.

Abstract: Shaped and fired, porous or impermeable nonvitreous ceramic microcapsules of metal oxide, preferably transparent and polycrystalline, are made by a non-melt process comprising the liquid-liquid extraction of aqueous metal oxide precursor with a dehydrating liquid having a limited water solubility, and drying and firing the resulting gelled microcapsules. For example, an aqueous titania sol is added to an agitated body of n-butanol to form a dispersion of droplets of said sol and water is rapidly extracted from the droplets to form gelled microcapsules; the latter are recovered by filtration, dried, and fired to convert them into transparent, sealed or heat-sealable, non-vitreous ceramic, spherical microcapsules of polycrystalline titania. The microcapsules can be used as fillers for plastic and other composites or filled with a selected solid, liquid or gas for purpose of storing, transporting, or facilitating the use of the same.

Abstract: An ester of a fluoroaliphatic radical- and aliphatic chlorine-containing alcohol and a mono or polycarboxylic acid useful in carpet treatment.

Abstract: Vapor permeable microcapsules filled with volatile perfluoroalkyl pentafluorosulfide and used to tag articles for the detection thereof.

Abstract: A gum stock composition comprising fluoropolymer gum, polyepichlorohydrin gum, polyphenol, and organo-onium compound is mixed with acid acceptor to form a curable gum stock, and the latter is shaped and cured to form shaped elastomeric articles.

Abstract: A liquid composition useful for minimizing corrosion of aluminum surfaces comprising ethylene glycol or propylene glycol and fluoroaliphaticsulfonamidophosphonic acid or the salt thereof.

Abstract: Active hydrogen-containing fluorochemical is used as a foam stabilizer for polyurethane foams. For example, rigid or flexible polyurethane foams with high or low density and uniform cellular structure are prepared using fluoroaliphatic radical-substituted poly(oxyalkylene) polyols as foam stabilizers.

Abstract: A gum stock composition comprising polyepichlorohydrin gum, polyphenol, organo-onium compound, and acid acceptor is shaped and cured to form shaped elastomeric articles.

Abstract: A diorgano sulfur oxide is included in a curable vinylidene fluoride elastomer formulation to provide desirable curing characteristics.

Abstract: Carpet is rendered soil resistant and stain repellant by contacting it with a carpet treating composition comprising a liquid containing a water-insoluble addition polymer derived from polymerizable ethylenically unsaturated monomer free of nonvinylic fluorine and having at least one major transition temperature higher than about 25.degree. C., and a water-insoluble fluoroaliphatic radical- and aliphatic chlorine-containing ester having at least one major transition temperature higher than about 25.degree. C.

Abstract: A blend of (a) 90 to 20 parts fluoropolymer gum of 60 to 85 mol percent vinylidene fluoride, 10 to 40 mol percent of hexafluoropropene and 0.15 to 3 mol percent bromine-containing olefin, and (b) 10 to 80 parts fluorosilicone gum is provided which can be vulcanized in presence of free-radical initiators to produce elastomeric vulcanizates with desired balance of chemical solvent or fluid resistance, high temperature stability, and low temperature flexibility.

Abstract: Latent fingerprints having a latency of several weeks are applied to paper substrates using compositions comprising trimeric aliphatic acids of at least 30 carbon atoms which are substantive to paper fibers are substantially non-volatile, and are non-hardening, non-toxic and non-hygroscopic. The latent fingerprints are developed as desired by dusting in the conventional manner with toner particles, suitably, comprising magnetic particles in oleophilic matrix.

Abstract: A thermally stable, curable fluoroelastomer composition containing sulfonium curing agent is described. The composition is curable in reactive admixture with an inorganic acid acceptor and includes:(a) a fluoroelastomer comprising vinylidene fluoride;(b) at least one triorgano sulfonium compound; and(c) at least one aromatic polyhydroxy compound.

Abstract: Durably launderable and dry-cleanable repellency to water and oil is conferred on fabrics consisting essentially completely of hydrophobic synthetic fibers by application of a blend of a fluoroaliphatic vinyl polymer and a carbodiimide, preferably comprising fluoroaliphatic groups.

Abstract: The surfaces of articles made of aluminum, such as annodized aluminum and bare aluminum, are treated with N-alkyl-fluoroaliphaticsulfonamidophosphonic acids or salts thereof to impart corrosion resistance to said surfaces.

Abstract: Solid, shaped and fired refractory articles, such as fibers and microspheres, of titanium dioxide are made by shaping, gelling, and firing titania sols. Said fibers can be made by extruding in air a viscous aqueous titania sol, and heating and firing the resulting green fiber to remove water, decompose and volatilize undesired constituents, and form a refractory fiber of polycrystalline titanium dioxide, which is useful, for example, to form refractory fabrics or as reinforcement for composites. Said microspheres can be made by dispersing droplets of an aqueous titania sol in an organic dehydrating liquid, separating the resulting green microspheres from the dehydrating liquid, and heating and firing the green microspheres to form solid refractory microspheres of polycrystalline titanium dioxide, which are useful, for example, in reflective signs or traffic marking surfaces.

Abstract: Polyfunctional poly(perfluoroalkylene oxide) compounds, such as compounds of the formulaA--CF.sub.2 O(CF.sub.2 CF.sub.2 O).sub.m (CF.sub.2 O).sub.n CF.sub.2 --A'where A and A' are reactive radicals containing a polymerizable functional group, e.g., hydroxyl, are provided, such compounds being useful as monomers in the preparation of polymeric materials, e.g., polyurethanes, possessing unusual low temperature stability and resistance to solvents.