Abstract: There are provided thermoplastic compositions comprising a polyphenylene ether and a rubber modified polystyrene resin having a discontinuous phase comprised largely of particles consisting of a core of polystyrene in a shell of a diene rubber membrane, said particles constituting at least 30 percent of the total volume of the rubber-modified polystyrene. Such compositions provide molded articles with substantial and unexpected properties in impact resistance, transparency and surface gloss, particularly at low mold temperatures, in comparison with known compositions of rubber modified polystyrene alone or those of other polystyrenes combined with polyphenylene ethers.

Abstract: Homogeneous blends of polyphenylene ether resin and copolymers of styrene and 4-tert-butylstyrene are described. Rubber modifiers can be included in the copolymer or the blend. The blends are moldable into highly ductile articles having higher heat distortion temperature.

Abstract: Novel compositions are provided which comprise a polyphenylene ether, optionally a high impact polystyrene, optionally, an effective amount of an aromatic phosphate flame retardant, and a low molecular weight polymer selected from a polyolefin glycol or a polyamide, said composition being free from or excluding a substantial content of polyolefin, such as polyethylene. Such compositions when molded are readily paintable, and exhibit good adhesion between the paint and the molded compositions as distinguished from compositions containing polyolefins, such as polyethylene, which has been found to adversely affect paint adhesion. In addition, the novel compositions possess good or improved Izod and Gardner impact strengths, and in the case of polyolefin glycol, such as polyethylene glycol, the mutual solubility of all the components of the compositions is increased. Included within the disclosure of the invention are methods of preparing and molding such compositions and the molded products obtained therefrom.

Abstract: Homogeneous blends of polyphenylene ether resin and copolymers of styrene and 4-tert-butylstyrene are described. Rubber modifiers can be included in the copolymer or the blend. The blends are moldable into highly ductile articles having higher heat distortion temperature.

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 novel compositions comprising blends of polyphenylene oxides with EPDM-silicone rubber, and optionally a polystyrene resin. The compositions when molded exhibit improved ductility and impact strength. Included within the disclosure are methods of preparing and molding the novel compositions and the molded products obtained therefrom.

Abstract: Novel compositions are provided which include a polyphenylene ether resin and EPDM-rubber polystyrene modified or polymerized with silicone oil which is free from unsaturated hydrocarbon groups. Included within the disclosure are methods of preparing and molding such compositions and the molded products obtained therefrom. The compositions provide molded products with substantially better room temperature properties, such as Izod impact and Gardner impact strengths, and surface appearance (gloss), than blends of polyphenylene ether with EPDM-polystyrene with no modifier or modified with an aliphatic mineral oil. Both Izod and Gardner impact strengths at low temperatures are also improved. Also included within the scope of the invention are reinforced and flame-retardant compositions of said polyphenylene ether resin and said EPDM-polystyrene polymerized with silicone oil.

Abstract: Improved thermoplastic compositions are described. These compositions exhibit low resistivities making them particularly suitable for use in electrical applications. These compositions comprise a composition of polyphenylene ether and alkenyl aromatic resins in combination with an effective amount of anti-static agent. The anti-static agent is a styrene-allyl alcohol copolymer, anionically polymerized poly(ethylene oxide) or a combination thereof.

Abstract: Novel thermoplastic molding compositions are described which are based on the combination of a polyphenylene ether resin and an alkenyl aromatic resin that is modified by rubber particles in the form of bundles of rubber fibers or rubber sheets.

Abstract: There are provided thermoplastic compositions comprising a low molecular weight polyphenylene ether resin which has an intrinsic viscosity of less than about 0.4, preferably less than 0.33 deciliters/gram as measured in chloroform at 30.degree. C., a styrene resin and an elastomeric block copolymer of a vinyl aromatic compound and a conjugated diene. The compositions are moldable to articles having good impact resistance.

Abstract: Novel compositions are disclosed which comprise a polyphenylene ether resin, a plasticizer, and a poly(alkylene oxide). Also disclosed are compositions comprised of a polyphenylene ether resin, a rubber-modified alkenyl aromatic resin, and a poly(alkylene oxide) as well as compositions comprised of a polyphenylene ether resin and an alkenyl aromatic resin modified with a poly(alkylene oxide). Included within the scope of this invention are corresponding reinforced and flame-retardant compositions.

Abstract: Novel plated compositions are disclosed which include a polyphenylene ether resin, a small-particle EPDM rubber-modified alkenyl aromatic resin, and a hydrogenated A-B-A block polymer. Also included within the scope of this invention are reinforced and flame-retardant compositions of said polyphenylene ether resin, said alkenyl aromatic resin modified with an EPDM rubber, and said hydrogenated elastomeric block copolymer.

Abstract: Novel compositions are disclosed which comprise a polyphenylene ether resin and polypentenamer. Also disclosed are compositions comprised of a polyphenylene ether resin, a rubber-modified alkenyl aromatic resin, and polypentenamer as well as compositions comprised of a polyphenylene ether resin and an alkenyl aromatic resin modified with polypentenamer. Included within the scope of this invention are corresponding reinforced and flame-retardant compositions.

Abstract: A novel process is provided for preparing a blend of a polyphenylene ether resin and an alkenyl aromatic addition polymer which comprises using an alkenyl aromatic monomer as a solvent for the oxidative coupling of a phenol to form a polyphenylene ether resin and thereafter polymerizing the alkenyl aromatic monomer to form said blend of alkenyl aromatic addition polymer and a polyphenylene ether resin.

Abstract: Novel compositions are disclosed which include a polyphenylene ether resin and an alkenyl aromatic resin modified with an EPDM rubber comprised of particles having a median diameter less than about two microns. Also included within the scope of this invention are reinforced and flame-retardant compositions of said polyphenylene ether resin and said alkenyl aromatic resin modified with an EPDM rubber.

Abstract: Novel compositions are disclosed which include a polyphenylene ether resin, an alkenyl aromatic resin modified with an EPDM rubber, and a hydrogenated radial teleblock copolymer. Also included within the scope of this invention are reinforced and flame-retardant compositions of said polyphenylene ether resin, said alkenyl aromatic resin modified with an EPDM rubber, and said hydrogenated radial teleblock copolymer.

Abstract: There are provided high impact strength thermoplastic compositions comprising a polyphenylene ether and a polystyrene resin and rubber of a rubber modified polystryene resin. The compositions include a dispersed elastomeric phase with the dispersed particles having a maximum mean diameter of 2 microns and preferably from about 0.5 to 2 microns. The small elastomeric particles provide molded articles with substantial and unexpected improvements in impact resistance, surface appearance and resistance to aggressive solvent systems in comparison with known compositions having dispersed elastomeric particles of larger than 2 microns in diameter.

Abstract: There are provided high impact strength thermoplastic compositions comprising a polyphenylene ether and a rubber modified polystyrene resin having not less than 22% by weight of a dispersed elastomeric gel phase. Such elastomeric particles, when dispersed in a martrix of polyphenylene ether and polystyrene, provide molded articles with substantial and unexpected improvements in impact resistance, surface appearance and resistance to aggressive solvent systems in comparison with known compositions made from rubber modified polystyrenes having dispersed elastomeric gel contents of less than 21% by weight.

Abstract: There are provided high impact strength thermoplastic compositions comprising a polyphenylene ether and a rubber modified polystyrene resin. The compositions include a dispersed phase of rubber particles having a maximum mean diameter of 2 microns and preferably from about 0.5 to 2 microns; the composition contains greater than 22% by weight of a rubber gel phase on a polyphenylene ether-free basis; and the rubber comprises a polybutadiene having a cis-1,4 content of at least 50% by weight and a vinyl content of no more than 10% by weight. The compositions provide molded articles with substantial and unexpected improvements in impact resistance, surface appearance and resistance to aggressive solvent systems and the retention of impact strength at sub-zero temperatures is particularly outstanding.

Abstract: Novel compositions are disclosed which include a polyphenylene ether resin and an alkenyl aromatic resin modified with an EPDM rubber comprised of particles having a median diameter less than about two microns and having a propylene content not greater than about 45% by weight. Also included within the scope of this invention are reinforced and flame-retardant compositions of said polyphenylene ether resin and said alkenyl aromatic resin modified with an EPDM rubber.