Abstract: A process for preparing tetrahydrofuran which comprises heating a carboxylic acid monoester of 1,4-butanediol in the presence of a dehydroacyloxylation catalyst.

Abstract: A flame retardant polycarbonate composition comprising in admixture an aromatic carbonate polymer and an additive which may be the metal salts of sulfonic acids of aromatic sulfoxides. Also, included herein are a non-opaque flame retardant polycarbonate composition of an aromatic carbonate polymer and an additive which may be the metal salts of sulfonic acids of aromatic sulfoxides; said aromatic carbonate polymer and additive having a refractive index in the range of 1.54 to 1.65.

Abstract: A process for preparing a thermoplastic randomly branched aromatic polycarbonate which process comprises reacting at least 20 weight percent of a stoichiometric quantity of a carbonate precursor with a mixture of a dihydric phenol and at least 0.05 mole percent of a polyfunctional aromatic compound in a medium of water and a solvent for the polycarbonate having present therein at least 1.2 mole percent of a polymerization catalyst, while concomitantly adding to the reaction medium sufficient alkali metal hydroxide to maintain a pH range of about 3.0 to about 6.0, and then adding sufficient alkali metal hydroxide to raise the pH to at least about 9.0 to less than about 12 while reacting the remaining carbonate precursor.

Abstract: This disclosure is for a solvent flashing process for recovering polymer from dilute solution in discrete, uniform granules substantially free of solvent. The process comprises pressurizing a dilute solution of a polymer dissolved in a solvent, preferably at an elevated temperature, spraying the solution through a first fluid atomizing outlet of a two fluid nozzle, and forcing a hot gas through at least one outlet port of the two fluid nozzle directed so as to intersect with the polymer solution emerging from the nozzle. The solution is atomized into fine droplets from which the bulk of the solvent flashes by both passage through the atomizing nozzle and by a shearing of the solution by the hot gas leaving finely divided granules of polymer which are collected in water. The process is characterized by the use of the two fluid nozzle and by the passage of the hot gas through the nozzle which causes further atomizing of the polymer solution with more efficient heat transfer from the gas to the polymer solution.

Abstract: A process for preparing a polycarbonate having improved resistance to thermal degradation and improved impact resistance by reacting a carbonate precursor such as phosgene with a dihydric phenol such as bisphenol-A in an aqueous medium while adding sufficient alkali metal hydroxide to maintain a pH of between 8.0 and 10.2 during the entire reaction.

Abstract: A process for preparing diols which comprises reacting diol esters with a lower alkanol in the presence of a transesterification catalyst comprising magnesia.

Abstract: A flame retardant polycarbonate composition comprising in admixture an aromatic carbonate polymer and a flame retardant additive which may be the metal salts of either monomeric or polymeric phenol ester sulfonic acids, or mixtures thereof.

Abstract: A thermal oxidatively stable aromatic polycarbonate composition which is stabilized with a minor amount of a phosphonite, which phosphonite has the general following formula: ##EQU1## Preferably, the phosphonite is diphenylbenzene phosphonite. The composition may also have included with it particular epoxy compounds.

Abstract: An injection moldable phenol aldehyde resin composition in pellet form having a diameter of at least 1/16 of an inch and having in admixture with the pellets a metallic salt of a long chain fatty acid and to a process for preparing such composition in pellet form.

Abstract: Phenol-aldehyde injection moldable pellets are disclosed which are coated with a composition which comprises (1) a metallic salt of a long chain fatty acid of 8-20 carbon atoms and (2) a material selected from the group consisting of (a) an alkyl ester of an aromatic acid, (b) an alkyl ester of an aliphatic acid, (c) mixtures of (a) and (b), and (d) mixtures selected from the group consisting of (a), (b), and (c) with a material selected from the group consisting of polyglycols, polyglycol esters and mixtures of polyglycols and polyglycol esters.

Abstract: An improved flame retardant polycarbonate composition of an aromatic polymer in admixture with an organic alkali metal salt or an organic alkaline earth metal salt or mixtures thereof, which composition has in admixture therewith a siloxane.

Abstract: A process for preparing allylic esters of carboxylic acids which comprises reacting a mixture of a lower alkyl carboxylate ester, water, and the corresponding carboxylic acid and alcohol with an olefin having an allylic carbon-hydrogen bond and oxygen in the presence of an oxidation catalyst.

Abstract: A process for preparing vinyl esters of carboxylic acids which comprises reacting ethylene, a lower alkyl carboxylate ester, water and oxygen in the presence of a catalyst system comprising an oxidation catalyst and an acidic co-catalyst.

Abstract: A process for preparing allylic esters of carboxylic acids and allylic alcohols which comprises reacting a mixture of a lower alkyl carboxylate ester, water, and the corresponding carboxylic acid and alcohol with an olefin having an allylic carbon-hydrogen bond and oxygen in the presence of a catalyst system comprising an oxidation catalyst and an acidic co-catalyst.

Abstract: A process for preparing vinyl esters of carboxylic acids which comprises reacting a mixture of a lower alkyl carboxylate ester, water, and the corresonding carboxylic acid and alcohol with ethylene and oxygen in the presence of an oxidation catalyst.

Abstract: A process for preparing allylic esters of carboxylic acids and allylic alcohols which comprises reacting an olefin having an allylic carbon-hydrogen bond, a lower alkyl carboxylate ester, water and oxygen in the presence of a catalyst system comprising an oxidation catalyst and an acidic co-catalyst.

Abstract: A vapor phase process for preparing allylic alcohols which comprises reacting an allylic ester of a lower alkyl carboxylic acid with a lower alkanol in the presence of a transesterification catalyst comprising magnesia.

Abstract: A thermally stable aromatic polycarbonate composition which is stabilized with an epoxy compound and a phosphinite, which phosphinite has the general following formula: ##EQU1## Preferably, the phosphinite is ethyl diphenyl phosphinite.

Abstract: A flame retardant polycarbonate composition comprising in admixture an aromatic carbonate polymer and a flame retardant additive which may be the metal salts of sulfonic acids of monomeric and polymeric aromatic carboxylic acids and esters, and mixtures thereof.

Abstract: A flame retardant polycarbonate composition comprising in admixture an aromatic carbonate polymer and a flame retardant additive which may be the metal salts of either monomeric or polymeric aromatic ether sulfonic acids, or mixtures thereof.