Abstract: A curable fluoroelastomer composition comprising: (A) fluoroelastomer gum comprising interpolymerized, repeating units derived from vinylidene fluoride, tetrafluoroethylene, and copolymerizable hydrocarbon olefin, (B) polyhydroxy compound, (C) organo-onium compound, and (D) fluoroaliphatic sulfonyl compound adhesion promoter, where the amount of fluoroaliphatic sulfonyl compound in the elastomeric composition is sufficient to result in greater adhesion of the elastomeric composition, after curing, to an inorganic surface coated with a primer composition comprising aminosilane compound, than can be achieved between an elastomeric composition comprising (A), (B), and (C), after curing, and an inorganic surface coated with said primer composition comprising aminosilane compound.

Abstract: A process for preparing bisphenol fluorene products which comprises reacting fluorenone with a phenol compound in the presence of an acidic condensing agent in a solution of an organic liquid wherein the bisphenol fluorene compound is insoluble and recovering the obtained bisphenol fluorene product from the reaction mixture.

Abstract: Epichlorohydrin is polymerized with an active hydrogen-containing initiator and the resulting secondary hydroxyl-containing polyepichlorohydrin is further reacted to produce a hydroxyl-terminated polyepichlorohydrin product having chains terminating in a primary hydroxyl group, said polyepichlorohydrin product being reactable with an inorganic azide to produce a poly(glycidyl azide) product useful as a binder for solid rocket propellants.

Abstract: A process for the synthesis of the fluorochemical compound having formulaR.sub.f SO.sub.2 N(CHR.sup.2 --CHR.sup.2 COO.sup.-) R.sup.1 N.sup.+ (R).sub.2 Hwherein R.sub.f is a fluoraliphatic radical containing at least 3 carbon atoms. The synthesis involves reaction of compounds of formula R.sub.f SO.sub.2 N(H)R.sup.1 N(R).sub.2 and CHR.sup.2 .dbd.CH.sup.2 COOH in solution at elevated temperatures. The process can be used to synthesize the fluoroaliphatic amphoteric amino carboxylate surfactant having the formula:C.sub.6 F.sub.13 SO.sub.2 N(C.sub.2 H.sub.4 COO.sup.-) C.sub.3 H.sub.6 N.sup.+ (CH.sub.3).sub.2 Hwhich compound is useful in aqueous film-forming foamable concentrates for extinguishing flammable liquid fires.

Abstract: A method of treating hazardous material or other substrate with an aqueous air foam, comprising the steps of (1) preparing an aqueous solution or dispersion comprising (a) water-soluble polyhydroxy polymer having a plurality of hydrogen-bondable 1,2- and/or 1,3-diol structures capable of complexation with the borate anion, B(OH).sub.4.sup.

Abstract: This invention provides oligomer-free polyesters that consist essentially of repeating, interpolymerized units derived from isophthalic acid and/or terephthalic acid, and 9,9-bis-(4-hydroxyphenyl)-fluorene, a process for making such polyesters and articles comprising said polyesters such as electrical capacitors, optical films and fibers.

Abstract: An improved aqueous film-forming foamable concentrate which is particularly useful for extinguishing flammable liquid fires. The preferred formulation contains (a) fluoroaliphatic amphoteric surfactant, preferably a fluorinated aminocarboxylate having a C.sub.4 to C.sub.10 perfluoroaliphatic group, (b) fluoroaliphatic anionic surfactant, preferably a C.sub.4 to C.sub.10 perfluoroalkane suflonate, and (C) short chain (C.sub.6 to C.sub.10) alkyl ether sufate hydrocarbon surfactant. When the concentrate is diluted with fresh or sea water and aerated, an aqueous film-forming foam is produced which is useful in extinguishing flammable liquid fires such as a fuel fire. The foam quickly spreads a superior vapor-sealing film on the surface of a burning fuel. The film reforms quickly when disturbed. The improved film-forming properties results in quicker and more reliable extinguishment of flammable liquid fires.

Abstract: Shaped porous filtering structures of substantially uniform thickness and density particularly suited for filtration of gases and vapors comprising spaced adsorbent granules unified into a solid, self-sustaining, unitary, impact-resistant body by adherent binder particles, respirators incorporating such structures as the gas and vapor filtration elements and methods for making the shaped porous filtering structures are disclosed.

Abstract: The novel respiratory mask has a soft, compliant facepiece to which is permanently sealed a relatively thin, rigid insert. The insert has swept back cheek portions, each formed with an aperture at which a filter cartridge is snapped into place through an opening in the facepiece. Adjacent said opening, the facepiece has a rigid which is bent over and stretched outwardly by the cartridge to create a hermetic seal. Each filter cartridge is asymmetric and swept back to shift the center of gravity inwardly toward the wearer's head, thus making the mask seem to be lighter to a wearer than is a conventional respiratory mask of equal weight which has a center of gravity in front of the wearer's head. Fitted over an annular flange around a central aperture of the insert is a harness attachment. Because the insert and harness attachment can be lightweight, the mask can be lighter in weight than are prior masks having filters of equal weight.

Abstract: Shaped porous filtering structures of substantially uniform thickness and density particularly suited for filtration of gases and vapors comprising spaced adsorbent granules unified into a solid, self-sustaining, unitary, impact-resistant body by adherent binder particles. Respirators incorporating such structures as the gas and vapor filtration elements and methods for making the shaped porous filtering structures are disclosed.

Abstract: Chromophoric-moiety-containing, polymeric materials, containing at least one fluoroaliphatic radical, which are useful as dyes or colorants for fluorine-containing liquids, as coatings or components of coatings which are colored, light-absorbing, or fluorescing and characteristic properties of flurocarbon polymers, e.g. chemical inertness and hydrophobicity; and a method of detecting leaks in normally sealed devices, e.g. electronic devices, using a coating which includes the polymeric material, and a bath of fluorine-containing liquid in which the coating is soluble.

Abstract: A method of treating hazardous material or other substrate with an aqueous air foam, comprising the steps of (1) preparing an aqueous solution or dispersion comprising (a) water-soluble polyhydroxy polymer having a plurality of hydrogen-bondable 1,2- and/or 1,3-diol structures capable of complexation with the borate anion, B(OH).sub.4.sup.

Abstract: An extrudable composition comprising thermoplastic hydrocarbon polymer, poly(oxyalkylene) polymer and fluorocarbon polymer. The poly(oxyalkylene) polymer and the fluorocarbon polymer are present in the composition in such relative proportions and concentrations as to reduce the occurence of melt defects during the extrusion of said hydrocarbon polymer composition.

Abstract: Omega-chlorosulfonyl perfluoroalkanesulfonates and omega-fluorosulfonyl perfluoroalkane sulfonates. These compounds can be used to prepare esters, amides, or latent catalysts for the polymerization of cationically-sensitive monomers. The .omega.-chlorosulfonyl perfluoroalkanesulfonates can be reacted with ethylenically unsaturated compounds to incorporate hydrophilic perfluoroalkanesulfonate groups into the ethylenically unsaturated compound.

Abstract: Asymmatric, porous polyamide membranes permeable to fluid flow comprising:(A) a porous skin layer, and(B) adjacent to the skin layer, an integral, porous support layer having at least one region comprising a network of substantially parallel, hollow tube-like structures, each of the tube-like structures being oriented such that the longitudinal dimension of each tube-like structure is essentially perpendicular to the skin layer;whereinthe skin layer is relatively thin and dense compared to the support layer,the pore diameters in the skin layer are relatively small compared to the diameters of the tube-like structures in the support layer,in membrances having support layers with more than one region, the cross-sectional area of the tube-like structures is larger in regions located farther from the skin layer, andthe polyamide is an aliphatic polyamide having a glass transition temperature of less than 200.degree. C., and method of making the same.

Abstract: A thermal transfer means comprising a flexible bag or pouch filled with a chemically inert, electrically nonconductive, nonflammable, essentially gas-free, thermally stable, thermally conductive, body of liquid comprising fluorochemical liquid. Said bag is fabricated from a flexible, durable plastic film that has low permeability to air and the fluorochemical liquid. The configuration of the bag is conformable to adapt to the geometry of the space, formed between the surface of a heat generating component or components and the surface of a heat sink, into which the bag is inserted, thereby contacting said surfaces and providing a thermal conduction path for heat generated by the heat generating component during operation from said component to the heat sink. The liquid has a boiling point such that it down not boil at the highest operating temperature of the device. Also provided is a method for making and filling the bag such that after sealing the bag is substantially gas free.

Abstract: An extrudable composition comprising hydrocarbon polymer, organophosphite or organophosphate compound and fluorocarbon polymer. The organophosphite or organophosphate and the fluorocarbon polymer are present in the composition in such relative proportions and concentrations as to reduce the occurrence of melt defects during the extrusion of said thermoplastic hydrocarbon polymer.

Abstract: Coatings are cured by simultaneous exposure to radiant energy and condensing inert perfluorochemical vapors.

Abstract: This invention provides oligomer-free polyesters that consist essentially of repeating, interpolymerized units derived from isophthalic acid and/or terephthalic acid, and 9,9-bis-(4-hydroxyphenyl)-fluorene, a process for making such polyesters and articles comprising said polyesters such as electrical capacitors, optical films and fibers.

Abstract: This invention provides fluorine-containing polymers having a plurality of thioorgano groups. These polymers are prepared by reacting a fluoropolymer precursor with one or more, organic, thiolate compounds thereby modifying the fluoropolymer precursor by grafting onto its backbone the thioorgano groups. Said thioorgano groups may contain functional moieties that modify the cure properties, bulk properties or compatibility of the thioorgano fluoropolymer precursor. This invention also provides shaped or formed cured articles, coatings and solutions comprising the thioorgano fluoropolymers, and blends thereof with other compatible polymers.