Abstract: The present invention relates to a composition for producing a thermoplastic moulding compound containing: A) an aromatic polycarbonate and/or aromatic polyester carbonate containing carboxy groups, wherein the polycarbonate has an acid value ranging from 0.5 to 10 mg of potassium hydroxide/g, determined in dichloromethane/ethanol as the solvent by means of potentiometric titration in accordance with DIN EN ISO 2114, method A in version 2002-06 with ethanolic potassium hydroxide solution at ambient temperature, and a weight-average molecular mass (Mw), determined by gel permeation chromatography at ambient temperature in dichloromethane as the solvent using a BPA polycarbonate standard, ranging from 15,000 to 40,000 g/mol, and B) a polymethyl methacrylate copolymer containing structural units derived from glycidyl methacrylate, wherein the copolymer has an epoxide equivalent weight, determined in dichloromethane as the solvent at ambient temperature in accordance with DIN EN 1877-1 in version 2000-12, of 0.

Abstract: The present invention relates to a method for preparing a polyester carbonate starting from cycloaliphatic diacids and aliphatic diols and to the polyester carbonate prepared by the method. The method according to the invention is a direct synthesis in which all the structural elements that form the subsequent polyester carbonate are already present as monomers in the first step of the method.

Abstract: The present invention relates to an aromatic polycarbonate containing: A) structural units with free COOH functionality which are derived from a hydroxybenzoic acid and are present as end groups, and B) structural units derived from a hydroxybenzoic acid, wherein component B) is chosen from at least one representative from B1) structural units with esterified COOH functionality which are derived from a hydroxybenzoic acid and are present as end groups, and B2) structural units derived from a hydroxybenzoic acid which are incorporated into the polymer chain via an ester or acid anhydride group, wherein the molar ratio of the quantity of component A to the quantity of component B ranges from 1.3 to 50, as well as copolymers and thermoplastic moulding compounds and moulds containing such a polycarbonate or copolymer, a method for preparing the polycarbonate and a method and use of the polycarbonate to prepare the copolymers.

Abstract: The present invention relates to a composition for producing a thermoplastic moulding compound containing: A) an aromatic polycarbonate and/or aromatic polyester carbonate containing carboxy groups, wherein the polycarbonate has an acid value ranging from 0.5 to 10 mg of potassium hydroxide/g, determined in dichloromethane/ethanol as the solvent by means of potentiometric titration in accordance with DIN EN ISO 2114, method A in version 2002-06 with ethanolic potassium hydroxide solution at ambient temperature, and a weight-average molecular mass (Mw), determined by gel permeation chromatography at ambient temperature in dichloromethane as the solvent using a BPA polycarbonate standard, ranging from 15,000 to 40,000 g/mol, and B) a polymethyl methacrylate copolymer containing structural units derived from glycidyl methacrylate, wherein the copolymer has an epoxide equivalent weight, determined in dichloromethane as the solvent at ambient temperature in accordance with DIN EN 1877-1 in version 2000-12, of 0.

Abstract: A process, and a device system suitable therefore, for producing polycarbonates are provided. The process contains the steps of producing at least chlorine and hydrogen by the chloralkali electrolysis of alkali chloride, preferably sodium chloride, in aqueous solution; synthesizing phosgene from carbon monoxide and chlorine; reacting phosgene with diol to form polycarbonate; providing a cleaned carbon dioxide gas stream as a process product of a process containing the steps of providing a CO2 gas stream and purifying the carbon dioxide gas stream by removing secondary constituents; converting the purified carbon dioxide into carbon monoxide and hydrogen by means of an RWGS reaction, which carbon monoxide and hydrogen can be used as raw materials for the polycarbonate production.

Abstract: The present invention relates to a method for producing an aliphatic polyester carbonate, the polyester carbonate itself, and to moulding compositions and moulded articles containing the polyester carbonate. The claimed method is characterised in particular in that the method comprises three steps and the last step is a melt transesterification method in the presence of two catalysts.

Abstract: The present invention relates to a process for preparing a polyester carbonate on the basis of aliphatic diacids and aliphatic diols and to the polyester carbonate prepared according to the process and to a moulding mass and moulding body containing the polyester carbonate. The process according to the invention is a direct synthesis in which all structural elements forming the subsequent polyester carbonate are already present as monomers in the first process step and in which two catalysts are used.

Abstract: A process for preparing polycarbonate by the phase interface process in the presence of at least one catalyst, wherein immediately after the optionally first addition of the at least one catalyst, from 0.01 to 20 J/kg of mixing energy is introduced into the system comprising the at least one catalyst within a time of from 2 to 1200 s. A mixture, an organic phase, and a process for distributing at least one catalyst in a system comprising an organic phase and an aqueous phase are also disclosed herein.

Abstract: The invention relates to a method for producing a specific hydroxyl compound by decarboxylating a specific carboxylic acid compound or a salt of said carboxylic acid compound in the absence of a catalyst and to a method for producing a bisphenol.

Abstract: The present invention relates to a process for producing polycarbonate according to a phase boundary process, from at least one dihydroxydiaryl alkane, phosgene, at least one catalyst and at least one chain terminator, the process allowing a reduction in the phosgene excess by a specific energy input during the dispersion of the aqueous and organic phases. The process also produces a polycarbonate with a low proportion of oligomers and a low proportion of Di-chain terminator carbonate.

Abstract: The present invention relates to a process for producing polycarbonate according to a phase boundary process, from at least one dihydroxydiaryl alkane, phosgene, at least one catalyst and at least one chain terminator, the process producing polycarbonate with a low proportion of oligomers and a low proportion of Di-chain terminator carbonate. The process according to the invention is characterized in that the chain terminator is added to the reaction system at a designated time.

Abstract: The invention relates to a process for preparing a specific hydroxy compound by means of decarboxylation of a specific carboxylic acid compound or a salt of said carboxylic acid compound, to a method for preparing a diaryl carbonate, a bisphenol or a polycarbonate, a diaryl carbonate or bisphenol, a polycarbonate, and to a method for adjusting the isotope ratio of C14 to C12 in a polymer. A specific solvent is used during decarboxylation.

Abstract: The present invention relates to a method for preparing a polyester carbonate starting from cycloaliphatic diacids and aliphatic diols and to the polyester carbonate prepared by the method. The method according to the invention is a direct synthesis in which all the structural elements that form the subsequent polyester carbonate are already present as monomers in the first step of the method.

Abstract: The invention relates to a method for producing a specific hydroxy compound by decarboxylating a specific carboxylic acid compound or a salt of said carboxylic acid compound in the presence of a Bronsted base. The invention also relates to a method for producing a diaryl carbonate or a bisphenol, to a method for producing a polycarbonate and to a use of a Bronsted base during the reaction of the decarboxylation of a specific carboxylic acid compound or a salt of said carboxylic acid compound.

Abstract: The invention relates to a process for preparing a specific hydroxy compound by means of decarboxylation of a specific carboxylic acid compound or a salt of said carboxylic acid compound, to a method for preparing a diaryl carbonate, a bisphenol or a polycarbonate, a diaryl carbonate or bisphenol, a polycarbonate, and to a method for adjusting the isotope ratio of C14 to C12 in a polymer. A specific solvent is used during decarboxylation.

Abstract: The invention relates to a method for producing a specific hydroxyl compound by decarboxylating a specific carboxylic acid compound or a salt of said carboxylic acid compound in the absence of a catalyst and to a method for producing a bisphenol.

Abstract: A process for preparing polycarbonate by the phase interface process in the presence of at least one catalyst, wherein immediately after the optionally first addition of the at least one catalyst, from 0.01 to 20 J/kg of mixing energy is introduced into the system comprising the at least one catalyst within a time of from 2 to 1200 s. A mixture, an organic phase, and a process for distributing at least one catalyst in a system comprising an organic phase and an aqueous phase are also disclosed herein.

Abstract: The present invention relates to a process for producing a polycarbonate from a diphenol or two or more different diphenols and a carbonyl halide by the interfacial process. It is a feature of the process according to the invention that it is carried out on the basis of a chlorohydrocarbon or a mixture of a mixture of two or more chlorohydrocarbons using an organic solvent. An organic solvent is also provided.

Abstract: The present invention relates to a process for producing a polycarbonate from a diphenol or two or more different diphenols and a carbonyl halide by the interfacial process. It is a feature of the process according to the invention that it is carried out on the basis of a chlorohydrocarbon or a mixture of a mixture of two or more chlorohydrocarbons using an organic solvent. An organic solvent is also provided.

Abstract: The present invention relates to a melt transesterification process for the production of (co)polycarbonates from diaryl carbonates and cycloalkylidene diphenols, which process comprises the addition of a monohydroxyaryl compound in an amount of 5.0 to 20.0 wt.-%, based on the total mass of the reaction mixture. The invention further relates to a (co)polycarbonate obtained by the process.