Abstract: The present invention relates to an aromatic polycarbonate obtained via the melt transesterification of a diaryl carbonate, a bisphenol and an endcapping agent selected from paracumyl phenol, dicumyl phenol, p-tert-butyl phenol and mixtures of at least two of said endcapping agents, said polycarbonate having a melt volume rate of at least 20 cm3/10 min (ISO 1133, 300° C., 1.2 kg), a terminal hydroxyl group content of at most 800 ppm by weight, a Fries branching content of at most 1300 ppm by weight and a content of bulky end groups of at least 20 mol % defined as the sum of the mol % of end-groups based on said bisphenol and the mol % of end-groups based on said endcapping agent.

Abstract: The present invention relates to an aromatic polycarbonate obtained via the melt transesterification of a diaryl carbonate, a bisphenol and an endcapping agent selected from paracumyl phenol, dicumyl phenol, p-tert-butyl phenol and mixtures of at least two of said endcapping agents, said polycarbonate having a melt volume rate of at least 20 cm3/10 min (ISO 1133, 300° C., 1.2 kg), a terminal hydroxyl group content of at most 800 ppm by weight, a Fries branching content of at most 1300 ppm by weight and a content of bulky end groups of at least 20 mol % defined as the sum of the mol % of end-groups based on said bisphenol and the mol % of end-groups based on said endcapping agent.

Abstract: A molded article includes a polycarbonate resin, an ultraviolet (UV) absorbing component, a heat stabilizer component and an acid stabilizer component. The polycarbonate resin is produced by an interfacial polymerization process and has an end-cap level of at least about 98%, and includes a ratio of bound UV absorbing component to free UV absorbing component of less than about 1.0 when molded under abusive molding conditions. The polycarbonate resin may include high purity polycarbonate. The acid stabilizer component may include a sulfonic acid ester. Methods of forming molded articles are also described.

Abstract: The disclosure concerns a polymer blend derived from transesterification of (i) 69.9 to 95 weight percent polycarbonate; and (ii) 4.9 to 30 weight percent liquid crystal polymer; in the presence of 0.01 to 0.1 weight percent catalyst; wherein the polymer is transparent.

Abstract: A molded article includes a polycarbonate resin, an ultraviolet (UV) absorbing component, a heat stabilizer component and an acid stabilizer component. The polycarbonate resin is produced by an interfacial polymerization process and has an end-cap level of at least about 98%, and includes a ratio of bound UV absorbing component to free UV absorbing component of less than about 1.0 when molded under abusive molding conditions. The polycarbonate resin may include high purity polycarbonate. The acid stabilizer component may include a sulfonic acid ester. Methods of forming molded articles are also described.

Abstract: A process for manufacturing a polycarbonate composition includes melt polymerizing a dihydroxy compound and a carbonate compound in the presence of a catalyst to form a polycarbonate; and adding 1 to 400 ppm of glycerol tristearate to form the polycarbonate composition, wherein the polycarbonate composition is unquenched.

Abstract: Disclosed herein are articles formed from polycarbonate prepared according to a melt polymerization method. The disclosed articles may include a composition comprising a melt polycarbonate resin derived from diphenyl carbonate; and glycerol tristearate mixed with the melt polycarbonate resin. The resulting articles exhibit mechanical properties improving upon articles formed from polycarbonate prepared according to conventional melt polymerization processes and are comparable to the mechanical properties apparent in articles prepared from interfacial polycarbonate compositions. Methods of preparing the melt polycarbonate composition are further disclosed herein.

Abstract: The present disclosure relates to articles formed from composition comprising a melt polycarbonate component and an interfacial polycarbonate component. The resulting articles exhibit mechanical properties improving upon articles formed from polycarbonate prepared according to conventional melt polymerization processes.

Abstract: The present disclosure relates to articles formed from composition comprising a melt polycarbonate component and an interfacial polycarbonate component. The resulting articles exhibit mechanical properties improving upon articles formed from polycarbonate prepared according to conventional melt polymerization processes.

Abstract: The present disclosure relates to articles formed from polycarbonate prepared according to a melt polymerization method. The resulting articles exhibit mechanical properties improving upon articles formed from polycarbonate prepared according to conventional melt polymerization processes and are comparable to the mechanical properties apparent in articles prepared from interfacial polycarbonate compositions. Methods of preparing the melt polycarbonate composition are further disclosed herein.

Abstract: The disclosure concerns a polymer derived from melt extrusion of (i) 80 to 95 wt % polycarbonate; said polycarbonate having and endcap level of 45% to 80% and a branching level of 300-5,000 m comprising the following branching structures: (ii) 4.9 to 20 wt % polymethyl methacrylate; and (iii) 0.1 to 1.5 wt % of catalyst; wherein the polymer is transparent, and wherein transesterification occurs with at least a portion of the polycarbonate and the polymethyl methacrylate during melt extrusion.

Abstract: The disclosure concerns a polymer derived from melt extrusion of (i) 80 to 95 wt % polycarbonate; said polycarbonate having and endcap level of 45% to 80% and a branching level of 300-5,000 m comprising the following branching structures: (ii) 4.9 to 20 wt % polymethyl methacrylate; and (iii) 0.1 to 1.5 wt % of catalyst; wherein the polymer is transparent, and wherein transesterification occurs with at least a portion of the polycarbonate and the polymethyl methacrylate during melt extrusion.

Abstract: The disclosure concerns a polymer blend derived from transesterification of (i) 69.9 to 95 weight percent polycarbonate; and (ii) 4.9 to 30 weight percent liquid crystal polymer; in the presence of 0.01 to 0.1 weight percent catalyst; wherein the polymer is transparent.

Abstract: A process for manufacturing a polycarbonate composition includes melt polymerizing a dihydroxy compound and a carbonate compound in the presence of a catalyst to form a polycarbonate; and adding 1 to 400 ppm of glycerol tristearate to form the polycarbonate composition, wherein the polycarbonate composition is unquenched.

Abstract: A process for manufacturing a polycarbonate composition includes melt polymerizing a dihydroxy compound and a carbonate compound in the presence of a catalyst to form a polycarbonate; and adding 1 to 400 ppm of glycerol tristearate to form the polycarbonate composition, wherein the polycarbonate composition is unquenched.

Abstract: The present disclosure relates to thermoplastic compositions, methods of making thermoplastic compositions, and articles made from thermoplastic compositions. The disclosed compositions comprise a polycarbonate polymer, a triacylglyceride release agent, and a monoacylglyceride release agent. In an embodiment, the thermoplastic composition comprises: greater than 90 weight percent based on the total weight of the composition of a melt polycarbonate polymer; a triacylglyceride release agent; and a monoacylglyceride release agent. The total amount of triacylglyceride release agent and the monoacylglyceride release agent is 0.01 to 0.5 weight percent based on the total weight of the composition.

Abstract: A method for manufacturing a polycarbonate composition having improved transparency can comprise reacting an aromatic dihydroxy compound and a diaryl carbonate under melt polymerization conditions to provide a polycarbonate; and contacting the polycarbonate with a polydiorgano siloxane having a kinematic viscosity of less than 20 mm2/sec at 25° C. as determined in accordance with ASTM D445, and an optional additive thereby making the polycarbonate composition. The polycarbonate composition has haze less than 1% as determined in accordance with ASTM D1003-07, and can be used for optical applications such as automotive headlamps.

Abstract: A process for manufacturing a polycarbonate composition includes melt polymerizing a dihydroxy compound and a carbonate compound in the presence of a catalyst to form a polycarbonate; and adding 1 to 400 ppm of glycerol tristearate to form the polycarbonate composition, wherein the polycarbonate composition is unquenched.

Abstract: A method for manufacturing a polycarbonate composition having improved transparency can comprise reacting an aromatic dihydroxy compound and a diaryl carbonate under melt polymerization conditions to provide a polycarbonate; and contacting the polycarbonate with a polydiorgano siloxane having a kinematic viscosity of less than 20 mm2/sec at 25° C. as determined in accordance with ASTM D445, and an optional additive thereby making the polycarbonate composition. The polycarbonate composition has haze less than 1% as determined in accordance with ASTM D1003-07, and can be used for optical applications such as automotive headlamps.

Abstract: The present disclosure relates to thermoplastic compositions, methods of making thermoplastic compositions, and articles made from thermoplastic compositions. The disclosed compositions comprise a polycarbonate polymer, a triacylglyceride release agent, and a monoacylglyceride release agent. In an embodiment, the thermoplastic composition comprises: greater than 90 weight percent based on the total weight of the composition of a melt polycarbonate polymer; a triacylglyceride release agent; and a monoacylglyceride release agent. The total amount of triacylglyceride release agent and the monoacylglyceride release agent is 0.01 to 0.5 weight percent based on the total weight of the composition.