Abstract: The present invention relates to a process for the production of high molecular weight, optionally branched polyarylene sulphides. These can be produced in a polar organic solvent in the absence of water in a reaction vessel cascade comprising from two to six reaction vessels.

Abstract: This invention relates to a process for the preparation of high molecular weight, optionally branched polyarylene sulphides. These may be prepared in polar organic solvents in the absence of water, substances containing water being dehydrated in the reaction mixture before the reaction.

Abstract: The invention relates to a process for the production of optionally branched polyarylene sulfides by reacting dihalogen benzenes in admixture with aromatic polyhalogen compounds and alkali sulfides in polar solvents, the reaction being carried out in the presence of reducing agents.

Abstract: This invention relates to a new process for the production of optionally branched polyarylene sulphides from optionally substituted halogen benzenes in admixture with aromatic polyhalogen compounds and alkali metal sulphides in polar solvents, with the addition of reducing agents and other polyhalogenated compounds.

Abstract: This invention relates to a process for the production of optionally branched polyarylene sulphides in piperazinones as solvent.

Abstract: This invention relates to a process for the production of high molecular weight, optionally branched polyarylene sulphides. These polyarylene sulphides may be produced in a polar organic solvent in the absence of water in a one-vessel reaction.

Abstract: A process for removing onium salts from aqueous solutions comprising adding a phenolic compound to an onium salt containing aqueous solution, contacting the solution with a water-immiscible organic material whereby the onium salt migrates into the water-immiscible organic material and separating the aqueous hase from the onium salt in the water-immiscible organic material.

Abstract: The invention describes a process for the preparation of optionally branched polyarylene sulphides in organophosphorus compounds as solvents.

Abstract: The invention relates to a process for the preparation of polyarylene sulphides in alkylated polyureas at a temperature of 250.degree. to 290.degree. C. under a pressure from 4 to 50 bars.

Abstract: A high molecular weight stabilized polymer composition containing p-polyphenylene sulfide and a siloxane.

Abstract: High molecular weight p-polyarylensulfides having a high melt viscosity, capable of being processed thermoplastically, and have good mechanical properties are produced by reacting components (a), (b), and (c) in a polar solvent with a molar ratio of (a):(c) in the range of 0.85:1 to 1.15:1 and a molar ratio of (c): solvent in the range of 1:2 to 1:15, for a time of up to 10 hours at a temperature of from 160.degree. C. to 300.degree. C.

Abstract: Process for preparing polyarylensulfides by reacting dihalogenobenzenes, optionally substituted with polyhalogenoaromatic compounds with 3 or 4 halogeno substituents, and alkali metal sulfide in polar solvents using alkali metal sulfites and/or alkaline earth metal sulfites as catalysts.

Abstract: This invention relates to the thermal stabilization of mixtures of aromatic polycarbonates and ABS polymers using 0.01 to 3% by weight, based on the total mixture, of esters of boric acid, in particular with ortho and/or para-alkyl substituted phenols or the corresponding bis-phenols.

Abstract: Stabilized thermoplastic moulding compositions comprising (1) from 10 to 90 parts by weight of a polycarbonate, based on aromatic dihydroxy compounds; and (2) from 90 to 10 parts by weight of a mixture of (2.1) from 25 to 100 parts by weight of a graft copolymer of a monomer mixture of styrene, methyl methacrylate or acrylonitrile polymerized on a rubber; of (2.2) from 0 to 20 parts by weight of a butadiene polymer having a butadiene content of at least 5 parts by weight; and (2.3) from 0 to 75 parts by weight of a copolymer of styrene, .alpha.-methyl styrene, methyl methacrylate, acrylonitrile or methacrylonitrile; containing 0.01 to 3.0% by weight, based on the whole stabilized mixture, of at least one ester of phosphorous acid and an ortho- or para-substituted phenol or bisphenol, and a process for their production.

Abstract: The present invention relates to stable and bright thermoplastic aromatic polycarbonate compositions characterized in the absence of phosphites and boric acid esters and in that they comprise an additive amount of an organic-silicon compound having on its silicon atom three or four organo-oxy radicals.

Abstract: A process for preparing a polyarylene sulphide which comprises reacting(a) dihalogenobenzene consisting of 50 to 100 mol % of a compound of the formula ##STR1## or a compound of the formula ##STR2## or a mixture thereof and of 0 to 50 mol % of a compound of the formula ##STR3## wherein X is halogen and each R is selected from the group consisting of hydrogen, alkyl having 1 to 20 carbon atoms, cycloalkyl having 5 to 20 carbon atoms, aryl having 6 to 24 carbon atoms, alkaryl having 7 to 24 carbon atoms and aralkyl having 7 to 24 carbon atoms with the proviso that at least one R is other than hydrogen and(b) 0 to 3.0 mol % based on the dihalogenobenzene content of a polyhalogeno aromatic of the formulaArX.sub.n (IV)wherein Ar is an aromatic or heterocyclic radical with 6 to 24 carbon atoms having at least 3 free valencies, X is halogen and n is .gtoreq. 3 with(c) an alkyl metal sulphide in(d) a polar solvent in the presence of(e) 0.05-2.

Abstract: The present invention relates to polycarbonate composition characterized in the absence therefrom of phosphites and boric acid esters which compositions are made stable and bright by the incorporation of organic silicon compounds in combination with oxetane, dioxane or tetrahydrofurane compounds.

Abstract: Aromatic polyesters based on diphenols, terephthalic and isophthalic acid and particular chain terminators exhibit an improved color number, an improved flowability and increased dimensional heat stability with otherwise comparable mechanical characteristics.

Abstract: Preparation of a polyarylene sulphide by polycondensing a substituted p-dihalogenobenzene and optionally a polyhalogeno aromatic compound having at least three halo substituents with an alkali metal sulphide in a polar solvent in the presence of a catalytic amount of a di-alkali metal salt of a phosphonic acid.

Abstract: The invention is directed to flame-resistant, transparent aromatic polycarbonate compositions comprising polycarbonate resin and an additive amount of a member selected from the group consisting of aldehyde-bisulphite adducts and ketone-bisulphite adducts.