Abstract: A coating composition useful, for example, in the preparation of automotive gaskets and the like, the composition comprising:(1) a fluoroelastomer;(2) a quaternary ammonium or quaternary phosphonium salt accelerator;(3) a polyol;(4) an acid acceptor;(5) an oil-soluble chelating agent; and(6) an organic solvent.

Abstract: A normally liquid, non-detonable product having less than about 45.7 weight percent nitrogen comprising polymer which can be represented by the general formula:R(G).sub.n R.sup.1where, in the above formula,n is a number between 2 and 18;G is an azidomethyloxyethylene moiety;R is a monovalent residue of an organic initiator compound or a monovalent alkyl radical, R is essentially free of isocyanate-reactive moieties and may be substituted with non-interfering atoms or moleties and it cannot be substituted with energetic nitrogen-containing moieties other than azido moleties;R.sup.1 is a monovalent alkoxy radical, oxyaryl radical or combinations thereof, or R.sup.1 is an azido moiety, R.sup.1 is essentially free of isocyanate-reactive atoms or moieties and it may be substituted with non-interferring atoms or moieties and it cannot be substituted with energetic nitrogen-containing moleties other than azido moieties; orR and R.sup.1, taken together, are a carbon-oxygen bond when said polymer is a cyclic compound.

Abstract: Azeotropic compositions include a perfluorinated alkane or alkene and an organic solvent.

Abstract: A method for increasing the adhesion of a first layer comprising fluoroplastic to a second layer containing a peroxide-curable hydrocarbon elastomer is disclosed. The method involves adding a primary-amine containing unsaturated compound or polymer of less than 10,000 molecular weight to the hydrocarbon elastomer layer.

Abstract: A method of removing olefinic impurity, such as perfluoroisobutylene, from fluoroperhalocarbon liquid, such as perfluorinated liquid, comprising the step of contacting the fluoroperhalocarbon liquid with a body of particles comprising particles selected from the group consisting of alumina, alkali metal oxide, alkali metal hydroxide, alkaline earth oxide, alkaline earth hydroxide, silicon oxide, tin oxide, zinc oxide, alkaline earth basic carbonate, and alkaline earth basic phosphate, transition metal oxide particles and mixtures thereof.

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: Azeotropic compositions include a perfluorinated alkane or alkene and an organic solvent.

Abstract: An azeotropic composition includes a perfluorinated cycloaminoether and an organic solvent.

Abstract: A process of making poly(glycidyl azide) and 3,6 -dioxadecyl thiocyanate using a phase transfer catalyst that permits the recovery and recycle of the phase transfer catalyst.

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 method for the preparation of fluoroalkyl fluoroisobutyl ethers is disclosed. Such ethers are prepared by fluorinating, in an electrochemical cell, a solution comprising an adduct of perfluoro-isobutene and an aliphatic alcohol.

Abstract: A method of making hexafluoroacetone from hexafluoroacetone oxime comprising heating hexafluoroacetone oxime (or solvent complex thereof) with a concentrated mineral acid to yield hexafluoroacetone. Also a method of making hexafluoroacetone oxime from hexafluoroisobutyroyl carbanion alkylammonium salts. The oxime can be prepared by reacting the salts in solvent with an alkali or alkaline earth metal nitrite and subsequently decarboxylating and hydrolyzing the reaction product, or alternatively, reacting the salts in a solvent with dinitrogen tri- or tetra-oxide and subsequently decarboxylating and hydrolyzing the reaction product.

Abstract: A coating composition useful, for example, in the preparation of automotive gaskets and the like, the composition comprising:(1) a fluoroelastomer;(2) a quaternary ammonium or quaternary phosphonium salt accelerator;(3) a polyol;(4) an acid acceptor;(5) an oil-soluble chelating agent; and(6) an organic solvent.

Abstract: An azeotropic composition includes a perfluorinated cycloaminoether and an organic solvent.

Abstract: Fluorine-containing thermoplastic elastomeric compositions comprising: (A) a continuous phase comprising: (1) about 0 to 90 weight percent of thermoplastic polymer having a melt temperature or glass transition temperature greater than about 150.degree. C., and (2) about 10 to 100 weight percent of block thermoplastic elastomer having a melt temperature greater than about 150.degree. C.; and (B) a disperse phase comprising particles or domains of cured, fluoroelastomer composition. Such compositions are preferably prepared by dynamically vulcanizing the ingredients of the fluorine-containing thermoplastic elastomeric composition.

Abstract: A detection medium and method for use in detecting gross and fine leaks in a hermetically sealed package. In a preferred embodiment, the detection medium includes a detectable perfluorinated gas dissolved in a detectable perfluorinated liquid. The package is placed in a bombing chamber and then exposed to the detection medium under pressure introduce the detectable liquid and dissolved, detectable gas into the package through any gross leak openings and to introduce the detectable gas and some detectable liquid vapor into the package through any fine leak openings. The package is then removed from the detection medium and air dried to evaporate any detection medium attached to an exterior surface of the package. The package is placed in a test chamber which collects detectable gas and vapor of the detectable liquid escaping through the gross and fine leak openings. A measurement instrument detects whether a component of the detection medium has escaped from the sealed package as an indication of a leak.

Abstract: Thermographic elements comprising at least two layers, wherein:at least one of the layers comprises polymer, the polymer consisting essentially of, repeating, interpolymerized units derived from 9,9-bis-(4-hydroxyphenyl)-fluorene and isophthalic acid, terephthalic acid or blends thereof, the polymer being sufficiently low in oligomer content to allow formation of uniform film; andat least one of the layers is an imaging layer, selected from the group consisting of dye-donor layers, image-receiving layers or heat-activatable imaging layers, and a method of thermal imaging using receptor films comprising the polymer described above.

Abstract: A method of removing olefinic impurity, such as perfluoroisobutylene, from fluoroperhalocarbon liquid, such as perfluorinated liquid, comprising the step of contacting the fluoroperhalocarbon liquid with a body of particles comprising particles selected from the group consisting of alumina, alkali metal oxide, alkali metal hydroxide, alkaline earth oxide, alkaline earth hydroxide, silicon oxide, tin oxide, zinc oxide, alkaline earth basic carbonate, and alkaline earth basic phosphate, transition metal oxide particles and mixtures thereof.

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: A method of making a product comprising poly(glycidyl azide) by reacting polyepichlorohydrin and alkali and/or alkaline earth metal azides in the presence of certain quaternary amine compounds.