Abstract: A three dimensional copolymer network of polyphenylene ether segments and styrenic resins such as styrene/acrylonitrile copolymers provide articles of high heat reesistance and dielectric properties suitable for use in electronic components. Methods for preparing the copolymers employ polyphenylene ether polymers with end caps having at least one pair of unsaturated aliphatic carbon atoms, i.e. carbon-carbon double bond, and polymerize styrene monomers and acrylonitrile monomers or styrene/acrylonitrile copolymers or both in the presence of these polyphenylene ether polymers.

Abstract: Improved thermoplastic compositions based on compatibilized blends of polyphenylene ether and polyamide are disclosed. These compositions contain radial block copolymers (such as those based on styrene/butadiene) having at least three polymer chains which often terminate with non-elastomeric segments.

Abstract: Thermoplastic resin compositions comprising in admixture a poly(phenylene ether) resin and a poly(arylene sulfide) resin are provided. The poly(phenylene ether) resin comprises an ortho ester moiety which enhances the compatibility and mechanical properties of the composition. The compositions may optionally comprise impact modifiers and other additives. The compositions are useful for making molded articles.

Abstract: Improved thermoplastic compositions are disclosed, comprising a polyphenylene ether resin capped with an epoxytriazine compound; a thermoplastic polyester; and a radial block copolymer which itself comprises at least about 60% by weight of a polymerized vinyl aromatic material, and about 5%-40% of a polymerized conjugated diene monomer.

Abstract: Compositions containing a thermoplastic polyester resin, a polyphenylene ether resin capped with an epoxytriazine compound, linear, tapered, block copolymers and an elastomeric material.

Abstract: In accordance with the invention, there are provided thermoplastic compositions comprising an admixture of:(a) polyphenylene ether resin;(b) polyester resin; and(c) a compatibilizer for (a) and (b) comprised of polycarbonate-polyester copolymer in an amount sufficient to compatiblize components (a) and (b).In preferred embodiments, the polycarbonate-polyester copolymer is present in an amount of at least 2%, preferably at least about 5% and more preferably from about 5% to about 25% by weight based on 100% by weight of (a) and (b). In addition, preferably, the polycarbonate component of said polycarbonate-polyester copolymer is present in an amount of at least 1%, preferably at least about 3%, and more preferably from about 3% to about 20% by weight based on 100% by weight of (a) and (b).

Abstract: Epoxy-functionalized polyphenylene ethers are prepared by melt blending a polyphenylene ether with glycidyl acrylate in the presence of a lubricant such as at least one hydrogenated poly-.alpha.-olefin. The blending reaction takes place at a temperature in the range of about 250.degree.-300.degree. C., and the amount of glycidyl acrylate employed is about 2.5-5.0% by weight based on polyphenylene ether. The products are characterized by a gel content of less than 5% by weight. They form copolymer-containing compositions having excellent properties upon melt blending with linear polyesters such as poly(butylene terephthalate).

Abstract: A method for blending functionalized polyphenylene ethers made with graftable orthoester moieties, preferably the orthoester is 4-acryloyloxymethyl-2-methoxy-2-methyl-1,3-dioxolane monomer, with nucleophilic polymers, preferably polyesters, polyamides, or functionalized polyolefins. The preferred method for blending is by a one-step process, in which all reactions occur in one pass.

Abstract: Improved thermoplastic compositions are disclosed, comprising a polyethylene ether resin capped with an epoxytriazine compound; a thermoplastic polyester; and a radial block copolymer which itself comprises at least about 60% by weight of a polymerized vinyl aromatic material, and about 5%-40% of a polymerized conjugated diene monomer.

Abstract: Compositions containing thermoplastic polyester resin and polyphenylene ether resin capped with an epoxytriazine compound are described. The compositions also include linear, tapered, block copolymers.

Abstract: Epoxy-functionalized polyphenylene ethers are prepared by melt blending a polyphenylene ether with glycidyl acrylate in the presence of a lubricant such as at least one hydrogenated poly-.alpha.-olefin. The blending reaction takes place at a temperature in the range of about 250.degree.-300.degree. C., and the amount of glycidyl acrylate employed is about 2.5-5.0% by weight based on polyphenylene ether. The products are characterized by a gel content of less than 5% by weight. They form copolymer-containing compositions having excellent properties upon melt blending with linear polyesters such as poly(butylene terephthalate).

Abstract: Functionalized polyphenylene ethers made with graftable orthoester moieties, preferably the orthoester is 4-acryloyloxymethyl-2-methoxy-2-methyl-1,3-dioxolane monomer. The preferred method for grafting orthoester functionality onto polyphenylene ethers is by melt grafting. Once formed, these Polyphenylene ether graft orthoesters (PPE-g-OE) are useful as compatibilizers in blends of PPE with polyesters.

Abstract: Capped polyphenylene ethers are prepared by reaction of a polyphenylene ether with epoxy materials in methods which result in low levels of alkali metal ions and ammonium ions in the resulting product. Such low alkali metal ion and ammonium ion capped polyphenylene ethers are particularly useful in forming high impact blends with polyesters and polyamides, which find utility as molding compositions.

Abstract: Compositions of a polyphenylene ether, a polyolefin, and a certain copolymers of a vinyl aromatic compound conjugated with an alkene such as styrene-ethylene butylene-styrene triblock elastomers exhibit improved ductility and decreased delamination tendencies compared to prior art compositions.

Abstract: Thermoplastic compositions comprising polyphenylene ethers and polyesters, impact-modified by glycidyl (meth)acrylate grafted EPDM and compatibilized by an aromatic polycarbonate exhibit high impact strength alone and when combined with other impact modifiers. Their shear sensitive viscosity properties makes them uniquely suitable for extrusion and blow molding applications.

Abstract: Impact- and solvent-resistant resin blends are prepared from a polyphenylene ether or blend thereof with a polystyrene, a linear polyester such as a poly(alkylene dicarboxylate), at least one polymer containing a substantial proportion of aromatic polycarbonate units as a compatibilizing agent, and, preferably, at least one elastomeric polyphenylene ether-compatible impact modifier. There may also be present a minor amount of at least one epoxide and/or masked isocyanate such as triglycidyl isocyanurate or a glycidyl methacrylate polymer. The polyphenylene ether preferably has a low proportion of unneutralized amino nitrogen, if any.

Abstract: Solvent-resistant resin blends with a wide variety of desirable impact and tensile properties are prepared from a polyphenylene ether having a low proportion of unneutralized amino nitrogen or a blend thereof with a polystyrene; a poly(ethylene terephthalate), poly(butylene terephthalate), elastomeric polyester or mixture thereof; at least one elastomeric polyphenylene ether-compatible impact modifier and at least one polymer containing a substantial proportion of aromatic polycarbonate units as a compatibilizing agent. There may also be present a minor amount of at least one epoxide such as triglycidyl isocyanurate.

Abstract: Thermoplastic blends having excellent chemical resistance and improved impact strength are prepared from a polyphenylene ether, a linear polyester such as poly(alkylene dicarboxylate), a polymer containing a substantial proportion or aromatic polycarbonate units, and property improving amounts of an alkylene acrylate copolymer.

Abstract: Impact- and solvent-resistant resin blends are prepared from a polyphenylene ether, or blend thereof with a polystyrene, a linear polyester such as a poly(alkylene dicarboxylate), at least one elastomeric polyphenylene ether-compatible impact modifier and at least one polymer containing a substantial proportion of aromatic polycarbonate units as a compatibilizing agent. There may also be present a minor amount of at least one epoxide and/or masked isocyanate such as triglycidyl isocyanurate or a glycidyl methacrylate polymer. The polyphenylene ether is preferably inactivated by reaction with at least one non-volatile carboxylic acid or anhydride and/or by extrusion with vacuum venting.

Abstract: Thermoplastic compositions comprising polyphenylene ethers and polyesters, impact-modified by glycidyl (meth)acrylate grafted EPDM and compatibilized by an aromatic polycarbonate exhibit high impact strength alone and when combined with other impact modifiers. Their shear sensitive viscosity properties makes them uniquely suitable for extrusion and blow molding applications.