Abstract: Thermoplastic compositions moldable to articles of high impact strength are provided which comprise an intimate admixture of a polyphenylene ether resin, a styrene resin, and a radial teleblock copolymer comprising a vinyl aromatic compound, a conjugated diene, and a coupling agent.

Abstract: There are provided drip-retardant, plasticized thermoplastic compositions which comprise, in admixture, a polyphenylene ether resin, a plasticizer in an amount at least sufficient to provide a plasticized composition after molding, and a microfibrillar poly(tetrafluoroethylene)resin in an amount at least sufficient to render the thermoplastic composition non-dripping when molten. The present compositions meet even more stringent standards than the UL-94 flame test.

Abstract: Novel molding compositions are disclosed which comprise a polyphenylene ether resin, an alkenyl aromatic resin and EPDM rubber.

Abstract: Thermoplastic moldingcompositions having improved melt-flow characteristics and enhanced impact resistance characteristics are disclosed which comprise in intimate admixture (a) a polyphenylene ether resin, (b) a plasticizer composition, and (c) a minor amount of a hydrogenated radial teleblock copolymer of a vinyl aromatic monomer and a saturated rubber.

Abstract: There are provided compositions comprising a polyphenylene ether resin, an EPDM modified polystyrene and a copolymer of styrene and butyl acrylate, such compositions being characterized by good impact, thermal and flow properties.

Abstract: Thermoplastic molding compositions containing polyphenylene ether as the principal structural polymer provide moldings of superior processability and high impact resistance when they contain a minor amount of a selectively hydrogenated radial teleblock copolymer comprising vinyl aromatic compound blocks and saturated rubber blocks.

Abstract: Self-extinguishing and non-dripping thermoplastic compositions are provided which comprise a polyphenylene ether resin, a styrene resin, a halogenated aromatic flame retardant compound, an antimony containing compound, and an additive selected from the group consisting of polyesters, polyethylene, a low molecular weight polystyrene resin, alkyl esters of trimellitic acid, epoxy stearates, epoxy tetrahydrophthalates, a diorganopolysiloxane fluid, alkyl esters of adipic acid, alkyl esters of glycolic acid, dialkyl phthalates and triaryl phosphates.

Abstract: Novel thermoplastic molding compositions are disclosed which comprise a copolymer of a vinyl aromatic compound with an .alpha.,.beta.-unsaturated cyclic anhydride and a hydrogenated A-B-A block copolymer or a block copolymer of the A'-B'-A' type or an acrylic graft polymerization copolymer with or without a polyphenylene ether resin.

Abstract: Novel thermoplastic molding compositions are disclosed which comprise a copolymer of a vinyl aromatic compound with an .alpha.,.beta.-unsaturated cyclic anhydride and a hydrogenated A-B-A block copolymer or a block copolymer of the A'-B'-A' type or an acrylic graft polymerization copolymer with or without a polyphenylene ether resin.

Abstract: There are provided compositions comprising a polyphenylene ether and a synergistic combination comprising an elastomeric block copolymer of a vinyl aromatic compound and a conjugated diene and a polyolefin resin, optionally containing a styrene homopolymer or random copolymer resin. The addition of the combination of elastomeric block copolymer resin and polyolefin resin to polyphenylene ethers or mixtures of polyphenylene ethers and such polystyrenes provides unexpected improvements in toughness in parts molded from the composition, in comparison with compositions containing either the block copolymer or the polyolefin resin alone.

Abstract: There are provided compositions comprising a polyphenylene ether and a synergistic combination comprising an elastomeric block copolymer of a vinyl aromatic compound and a conjugated diene and a polyolefin resin, optionally containing a styrene homopolymer or random copolymer resin. The addition of the combination of elastomeric block copolymer resin and polyolefin resin to polyphenylene ethers or mixtures of polyphenylene ethers and such polystyrenes provides unexpected improvements in toughness in parts molded from the composition, in comparison with compositions containing either the block copolymer or the polyolefin resin alone.

Abstract: An improved process is disclosed which is useful in separating the catalyst residue from a polyphenylene ether reaction solution. The process is based on the use of an extracting agent in a liquid-liquid extraction process wherein the aqueous extraction phase is maintained in a continuous phase while the organic phase is maintained as a discrete phase.

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: Novel thermoplastic molding compositions are disclosed which are based on a rubber modified copolymer of a vinyl aromatic compound and an .alpha.,.beta.-unsaturated cyclic anhydride, and an acrylic graft polymerization copolymer, with or without a polyphenylene ether resin.

Abstract: It has been discovered that the use of a fatty acid-terminated saturated polyester in combination with a polyphenylene ether resin, a styrene resin, a halogenated aromatic flame retardant and ferrocene, results in compositions having enhanced thermal resistance during processing and which are moldable to articles having improved impact strength and a reduced tendency to drip molten or flaming resin when subjected to elevated temperatures.

Abstract: Self-extinguishing and non-dripping thermoplastic compositions are provided which comprise a polyphenylene ether resin, a styrene resin, a halogenated aromatic flame retardant compound, an antimony containing compound, and an additive selected from the group consisting of polyesters, polyethylene, a low molecular weight polystyrene resin, alkyl esters of trimellitic acid, epoxy stearates, epoxy tetrahydrophthalates, a diorganopolysiloxane fluid, alkyl esters of adipic acid, alkyl esters of glycolic acid, dialkyl phthalates and triaryl phosphates.

Abstract: Compositions comprising a polyphenylene ether and, optionally, a styrene resin, an aromatic phosphate, phosphonate or phosphine oxide, an aromatic halogen compound and an impact modifier comprising a diene polymer have excellent flame retardant properties during large scale flammability tests. The compositions will tolerate large amounts of aromatic halogen compound without discoloration and processing difficulties. In comparison with compositions of the present state of the art, peak burn temperatures are reduced, smoke is less dense, and flaming drips are eliminated in large as well as small scale burn tests.

Abstract: Novel compositions are disclosed which include a polyphenylene ether resin, a rubber-modified alkenyl aromatic resin, and aluminum silicate. Also included within the scope of this invention are flame-retardant compositions of said polyphenylene ether resin, said rubber-modified alkenyl aromatic resin, and said aluminum silicate.

Abstract: There are provided compositions comprising a polyphenylene ether and a synergistic combination comprising an elastomeric block copolymer of a vinyl aromatic compound and a conjugated diene and a polyolefin resin, optionally containing a styrene homopolymer or random copolymer resin. The addition of the combination of elastomeric block copolymer resin and polyolefin resin to polyphenylene ethers or mixtures of polyphenylene ethers and such polystyrenes provides unexpected improvements in toughness in parts molded from the composition, in comparison with compositions containing either the block copolymer or the polyolefin resin alone.

Abstract: Novel compositions are disclosed which comprise a low molecular weight polyphenylene ether resin having an intrinsic viscosity of less than about 0.4 dl/g, preferably less than 0.33 dl/g, as measured in chloroform at 30.degree. C., an elastomeric block copolymer of a vinyl aromatic compound and a conjugated diene, and a plasticizer. Also included within the scope of the invention are reinforced and flame-retardant compositions.