Abstract: Flame retardant mixtures of a polyphenylene ether resin, an alkenyl aromatic elastomer, an organic phosphate flame retardant agent and a crosslinking agent are described. They are curable by heating or by exposure to high energy radiation. Articles such as electrical wires and cables comprising insulation made of the composition, and a method of their production, are also disclosed.

Abstract: Curable flame retardant mixtures of a polyolefin (non-rubbery), a polyphenylene ether resin, an aromatic phosphate, a brominated compound or polymer, and a crosslinking agent are described. Electrically conductive articles having insulation material made of the composition and methods for preparing such articles are also disclosed.

Abstract: Flame retardant crosslinking admixtures of an olefinic rubber, a polyphenylene ether resin, an aromatic phosphate, a crosslinking agent, and optionally a stable brominated material are described. Electrically conductive articles, such as wires and cables, in which the compositions are incorporated as insulation material, and methods for their preparation, are also disclosed.

Abstract: Polyphenylene ether/rubber modified polystyrene compositions are uniquely suitable for flow molding large, e.g., 10 pounds or more, parts when the rubber modified polystyrene contains at least 12 percent by weight of particulate rubber, the rubber particles have an average diameter of greater than about 3 microns, and the compositions have an R* value of greater than about 16. R* is the ratio of the low shear rate viscosity to the high shear rate viscosity at the optimum processing temperature.

Abstract: Flame retardant mixtures of a polyphenylene ether resin, an alkenyl aromatic elastomer, an organic phosphate flame retardant agent and a crosslinking agent are described. They are curable by heating or by exposure to high energy radiation. Articles such as electrical wires and cables comprising insulation made of the composition, and a method of their production, are also disclosed.

Abstract: Impact-improved polyphenylene ether resin compositions which also exhibit improved melt behavior without degradation of other themal properties are provided by combining a polyphenylene ether polymer, an alkyl or aralkyl sulfonate of an alkali metal, where the alkyl or aralkyl radical has 5 to 25 carbon atoms, and an acrylate-styrene-acrylonitrile terpolymer.

Abstract: The present invention relate to a ternary polymer blend containing in admixture (a) a polyetherimide; (b) a polyphenylene ether; and (c) a block copolymer of a vinyl aromatic compound and an alkene compound. These ternary blends exhibit high glass transition temperatures and excellent flexural properties.

Abstract: Curable flame retardant mixtures of a polyolefin (non-rubbery), a polyphenylene ether resin, an aromatic phosphate, a brominated compound or polymer, and a crosslinking agent are described. Electrically conductive articles having insulation material made of the composition and methods for preparing such articles are also disclosed.

Abstract: Thermoplastic, flame-resistant copolymers comprised of an alkenyl aromatic compound, a bromine-substituted alkenyl aromatic compound, an .alpha.,.beta.-unsaturated monocarboxylic acid and a diene rubber are described. The copolymers are prepared by polymerizing the comonomers in solution. The copolymers are admixable with other materials, both polymeric and non-polymeric, and the resulting compositions can be molded into articles of various shapes and sizes which exhibit improved paint adhesion.

Abstract: The flame resistance of blends of polyphenylene ether resin and high impact polystyrene is upgraded by the inclusion of a combination of a polybrominated 1,4-diphenoxybenzene and antimony oxide. The resulting composition exhibits good thermal stability and is more resistant to undergoing juicing and blooming in comparison with the use of polybrominated diphenyl oxides.

Abstract: Polyphenylene ether resin compositions exhibiting improved melt behavior without degradation of other thermal properties are provided by combining a polyphenylene ether polymer and an alkyl or aralkyl sulfonate of an alkali metal, where the alkyl or aralkyl radical has 5 to 25 carbon atoms.

Abstract: Thermoplastic molding compositions are disclosed which comprise an intimate admixture of (a) a copolymer of a vinyl aromatic compound and an .alpha., .beta.-unsaturated cyclic anhydride, including rubber-modified copolymers thereof, and (b) impact modifiers comprising graft copolymers, copolyesters, and rubber-modified homopolymers. Optionally, the compositions can also include a polyphenylene ether resin and further, optionally, a normally liquid polybutadiene oligomer. Mixing (a) with a polyphenylene ether leads to a compatible composition, markedly improved in heat deflection temperature.

Abstract: Thermoplastic molding compositions are disclosed which comprise an intimate admixture of (a) a copolymer of a vinyl aromatic compound and an .alpha.,.beta.-unsaturated cyclic anhydride, including rubber-modified copolymers thereof, and (b) impact modifiers comprising graft copolymers, copolyesters, and rubber-modified homopolymers. Optionally, the compositions can also include a polyphenylene ether resin and further, optionally, a normally liquid polybutadiene oligomer. Mixing (a) with a polyphenylene ether leads to a compatible composition, markedly improved in heat deflection temperature.

Abstract: Thermoplastic compositions of a polyphenylene ether resin and a precompounded blend of a poly(arylolefin-olefin), an organopolysiloxane and a linking agent are described. The precompounding of the organopolysiloxane with a poly(arylolefin-olefin) enables the compatible incorporation of larger amounts of organopolysiloxane than otherwise possible, and the resulting novel composition provides various desirable properties.

Abstract: The ductile impact strength and tensile elongation of flame retardant compositions of a polyphenylene ether resin and a poly(alkenyl aromatic) are upgraded by the addition of only small amounts, typically from about 0.1 to about 10 parts by weight, of high molecular weight polyfunctional esters or low molecular weight saturated polyesters.

Abstract: Improved flame resistance is imparted to polymeric resins by incorporation of a blend of hydrated alumina and polyphenylene oxide, or a blend of hydrated alumina, polydiorganosiloxane and polyphenylene oxide.

Abstract: Thermoplastic molding compositions are disclosed which comprise an intimate admixture of (a) a copolymer of a vinyl aromatic compound and an .alpha.,.beta.-unsaturated cyclic anhydride, including rubber-modified copolymers thereof, and (b) impact modifiers comprising graft copolymers, copolyesters, and rubber-modified homopolymers. Optionally, the compositions can also include a polyphenylene ether resin and further, optionally, a normally liquid polybutadiene oligomer. Mixing (a) with a polyphenylene ether leads to a compatible composition, markedly improved in heat deflection temperature.

Abstract: Blends of a polyphenylene ether resin, optionally containing an impact modifier, are filled with finely divided particulate clay which is characterized by a very narrow size distribution, 98 percent or more of the particles being less than 2 microns in diameter, and a very small particle size, with the particles having mean equivalent spherical diameter of from 0.2 to 0.4 microns. This particular clay filler provides rigidity and stiffness, as expected, but with better retention of other physical properties which are normally adversely affected by other mineral fillers, such as larger particle size clay and titanium dioxide. Adhesion between this clay and the polymer, which is already good, is further enhanced by pre-cleaning the clay particles to remove surface dirt, chemicals and salts.

Abstract: There is provided a novel flame retardant system or additive which when incorporated in a polymer, such as polyphenylene ether resin compositons, produces novel flame resistant non-discolored polyphenylene ether resin compositions. The flame retardant system comprises a composition of stable halogenated organic compounds and boron containing salts or esters which are stable at 250.degree.-300.degree. C.

Abstract: Compositions or composites comprising a polyphenylene ether-styrene resin blend or composition are disclosed which have electromagnetic shielding properties so that when the compositions are used for electronic equipment components or housings they provide shielding against electromagnetic interference referred to as EMI. The composites eliminate the secondary treatments which have been used heretofore to provide these shielding properties, such as the application of electrically conductive silver, nickel, copper and graphite coatings, or the use of metal screens. The novel compositions of a polyphenylene ether-styrene blend contain as a conductive material, which attenuates the EMI, aluminum flakes, or a combination of aluminum flakes with carbon fibers or with a highly conductive carbon black or a combination of carbon fibers with conductive carbon black, or carbon fibers per se.