Abstract: A method is provided for making certain hydroxy-terminated arylene ethers useful as spacers in liquid crystalline polyesters. There is initially formed a dicarbonyl adduct from a dihydroxyaromatic compound, such as hydroquinone and a haloarylcarbonyl compound. The adduct formed is oxidized to the corresponding diester. Hydrolysis of the diester provides the hydroxy-terminated arylene ether.

Abstract: Polyphenylene ethers having chemically combined aminoalkyl groups are neutralized with a Bronsted acid to produce flame retardant polyphenylene ether Bronsted acid amine salts. The polyphenylene ether amine salts can be blended with polystyrene to produce flame retardant blends.

Abstract: A method of producing a photostimulable x-ray converter for digital radiographic applications including forming a solid mixture of europium activated barium fluorohalide phosphor and a chemical compound containing an impurity ion, heating the mixture to cause the impurity ion to diffuse into the phosphor matrix, combining the treated phosphor crystals with a thermoplastic synthetic organic polymer, subjecting the second mixture to elevated pressure and temperature conditions to obtain a void free suspension and cooling the mixture to obtain a solid storage member.

Abstract: A method is provided for making certain hydroxy-terminated arylene ethers useful as spacers in liquid crystalline polyesters. There is initially formed a dicarbonyl adduct from a dihydroxyaromatic compound, such as hydroquinone and a haloarylcarbonyl compound. The adduct formed is oxidized to the corresponding diester. Hydrolysis of the diester provides the hydroxy-terminated arylene ether.

Abstract: Polyphenylene ethers having chemically combined aminoalkyl groups are neutralized with a Bronsted acid to produce flame retardant polyphenylene ether Bronsted acid amine salts. The polyphenylene ether amine salts can be blended with polystyrene to produce flame retardant blends.

Abstract: Extrudate of polyphenylene ether-styrene resin blends having effective amounts of an organoamine salt has been found to have improved flame retardance.

Abstract: Liquid crystalline polyesters are provided employing 4,4'-dihydroxybiphenyls substituted with organo radicals which are intercondensed with bis(4-hydroxyphenyl)ether, iso- or terphthalic acid, and hydroxybenzoic acid. The liquid crystalline polyesters have been found to have improved processing characteristics.

Abstract: Liquid crystalline polyesters are provided having chemically combined 4,4'-bis(p-carboxyphenoxy)biphenyl, or 4,4'-bis(p-carboxyphenoxy)diphenylether units. These dicarboxyphenylether spacers can be obtained from the nitro displacement of alkyl nitrobenzene with the appropriate bisphenol.

Abstract: An effective amount of an iron halide has been found to impart improved flame retardant properties to polyphenylene ether styrene resin blends.

Abstract: UV stabilized polyphenylene ether polymers and blends thereof are provided by this invention. This is accomplished by bonding UV absorbers directly to the polyphenylene ether chain or by polymerizing monomers to which the UV absorbers are bound.