Abstract: This invention is concerned with a new class of flame retardant polycarbonate compositions. More particularly, the invention is concerned with admixtures of an aromatic polycarbonate and a flame retardant additive combination consisting of a halogenated organic compound and an alkali or alkaline earth metal salt of an inorganic sulfur compound. The flame retardant polycarbonates can be molded or formed into flame retardant articles such as films, sheets, fibers, laminates or reinforced plastics by conventional techniques.

Abstract: A flame retardant polycarbonate composition comprising in admixture an aromatic carbonate polymer and a minor amount of a mixture of a metal salt of an organic sulfonate or organic carboxylate, and an organic halogenated compound.This invention relates generally to flame retardant polycarbonate compositions and more particularly to flame retardant compositions containing an aromatic carbonate polymer and a minor amount of a mixture of a metal salt of an organic sulfonate or organic carboxylate, and an organic halogenated compound.

Abstract: A method is described for dehydrochlorinating 1,1,1-trichloro-2,2-bis(4-hydroxyphenyl)ethane employing a refluxing dipolar aprotic solvent, such as dimethylformamide, containing a lithium halide catalyst to produce a crystalline product consisting essentially of 1,1-dichloro-2,2-bis(4-hydroxyphenyl)ethylene. The crystalline product can be isolated in substantially pure form and converted to a high impact, flame retardant polycarbonate.

Abstract: A system for detecting thermal breakdown of organic resin coatings is described which can be used for locating failure occurring in electrical apparatus based on the use of a minor amount of a chemical tagging material. The chemical tag can be readily extracted from particulate generated by the thermal breakdown of the organic resin coating by extracting the particulate with an organic solvent and analyzing the extract in a gas chromatograph using an electron capture detector. Useful results have been found when employing certain halogenated aromatic organic compounds, such as N-alkyl tetrahalophthalimides, which can be employed in the particulating resin at concentrations of as little as 0.01% by weight.

Abstract: Organic diamines can be prepared by hydrogenating a preformed diimine in the presence of methanol and in the further presence of the tertiary alkyl mono-amine used to make the diimino compound. The diamino compounds thus obtained are useful as catalysts in the preparation of polyphenylene oxide resins.

Abstract: A method is described for dehydrochlorinating 1,1,1-trichloro-2,2-bis(4-hydroxyphenyl)ethane employing a refluxing dipolar aprotic solvent, such as dimethylformamide, containing a lithium halide catalyst to produce a crystalline product consisting essentially of 1,1-dichloro-2,2-bis(4-hydroxyphenyl) ethylene. The crystalline product can be isolated in substantially pure form and converted to a high impact, flame retardant polycarbonate.

Abstract: A method is provided for converting aromatic bis(ether N-organo substituted phthalimide) to aromatic bis(ether anhydride) by heating an aqueous mixture under pressure, of aromatic bis (ether N-organo substituted phthalimide) and phthalic anhydride, or phthalic acid. An exchange is effected between phthalic anhydride or phthalic acid and the aromatic bis(ether N-organo substituted phthalimide) to produce a liquid phase mixture of aromatic bis(ether phthalic acid) and an aqueous vapor phase mixture of N-organo substituted phthalimide. The N-organo substituted phthalimide is selectively removed from the liquid phase mixture by venting the vapor phase therefrom.

Abstract: 1,1,1-Trichloro-2,2-bis(4-hydroxyphenyl)ethane can be dehydrohalogenated to 1,1-dichloro-2,2-bis(4-hydroxyphenyl)ethylene by treating the former with liquid ammonia.

Abstract: This invention is concerned with a new class of flame retardant polycarbonate compositions. More particularly, the invention is concerned with an admixture of an aromatic polycarbonate and a flame retardant additive selected from an alkali or alkaline earth metal salt of an inorganic sulfur compound. The flame retardant polycarbonates can be molded or formed into fire-retardant articles, such as films, sheets, fibers, laminates, or reinforced plastics by conventional techniques.

Abstract: A phosphorylatedpolystyrene having a phosphorus group bonded to a phenyl group by an intervening methylene-amido alkane group and being substantially non-crosslinked. The phosphorylated polystyrene is formed by a one-step process.

Abstract: Phenols and thiophenols having an ortho-phenyl substituent react with most aldehydes and ketones in very strongly acidic liquid media to form a dibenzopyran or dibenzothiopyran. The dibenzopyrans, but not the dibenzothiopyrans, can be isomerized to their corresponding fluorenols. The pyran or thiopyran ring can be cleaved chemically or electrochemically to produce phenols and thiophenols which have an ortho substituent in the ortho position of the phenyl substituent of the starting phenol or thiophenol which is characteristic of the aldehyde or ketone reactant. These products as well as the fluorenols, being phenolic bodies, are useful as stabilizers and antioxidants.

Abstract: Aryl methylene polymers are prepared from the reaction of an aromatic compound containing nuclear bonded hydrogen and either chloral, bromal, or glyoxalic acid in the presence of a strong acidic catalyst.