Abstract: In an embodiment, a method of manufacture of a melt polycarbonate comprises melt polymerizing a bisphenol and diphenyl carbonate to form phenol and the melt polycarbonate in a polymerization unit; removing an overhead stream comprising the phenol in a gas phase from the polymerization unit; combining the overhead stream with a gas stream comprising a solvent in a gas phase to form a combined gas stream; wherein the combined gas stream has a freezing point at less than 3 mbar absolute that is less than the triple point of phenol; and condensing the combined gas stream in a condenser to form a condensed stream comprising the phenol and the solvent in a liquid phase.

Abstract: Disclosed is a modified endcapped polyalkylene terephthalate such as modified endcapped polybutylene terephthalate, as well as processes for making the modified endcapped polybutylene terephthalate and compositions and articles derived therefrom.

Abstract: Disclosed is a modified endcapped polyalkylene terephthalate such as modified endcapped polybutylene terephthalate, as well as processes for making the modified endcapped polybutylene terephthalate and compositions and articles derived therefrom.

Abstract: Biodegradable compositions containing an aliphatic-aromatic copolyester derived from aromatic polyesters. Methods of making the compositions through an in situ phosphorus containing titanium based catalyst and articles made from the compositions.

Abstract: The disclosure provides a method for recovering a dihydroxy aromatic compound and a dialkyl carbonate from a polycarbonate-containing composition comprising a polycarbonate and a phosphorus-containing flame retardant. The method comprises heating the composition in the presence of an alcohol and a transesterification catalyst having non-neutralizable groups at a temperature of 70° C. to 200° C. and a pressure of 50 mbar to 40 bar for a time sufficient to depolymerize the polycarbonate producing a dihydroxy aromatic compound and a dialkyl carbonate.

Abstract: The disclosure provides a method for recovering a dihydroxy aromatic compound and a dialkyl carbonate from a polycarbonate-containing composition comprising a polycarbonate and a phosphorus-containing flame retardant. The method comprises heating the composition in the presence of an alcohol and a transesterification catalyst having non-neutralizable groups at a temperature of 70° C. to 200° C. and a pressure of 50 mbar to 40 bar for a time sufficient to depolymerize the polycarbonate producing a dihydroxy aromatic compound and a dialkyl carbonate.

Abstract: A process of preparing a polyalkylene terephthalate comprising reacting an alkylene diol and an aromatic dicarboxy compound that is an aromatic dicarboxylic acid, aromatic dicarboxylic (C1-C3)alkyl ester, or a combination thereof, wherein ester interchange and polymerization occurs in the presence of a catalyst complex formed by the reaction of tetraisopropyl titanate and a boron, phosphorous or nitrogen-containing complexing agent, which catalyst can be synthesized in situ prior to ester interchange and introduced to a mixture of the alkylene diol and the aromatic dicarboxy compound prior to ester interchange.

Abstract: A process of preparing a modified polyalkylene terephthalate by melt polycondensation comprising reacting an alkylene diol and polyethylene terephthalate, wherein polymerization occurs in the presence of a catalyst complex formed by reaction of tetra(alkyl) titanate and a compound selected from phosphorus-containing compounds, nitrogen-containing compounds, boron-containing compounds, and combinations thereof.

Abstract: Biodegradable compositions containing an aliphatic-aromatic copolyester derived from aromatic polyesters. Methods of making the compositions through an in situ phosphorus containing titanium based catalyst and articles made from the compositions.

Abstract: Biodegradable compositions containing an aliphatic-aromatic copolyester derived from aromatic polyesters. Methods of making the compositions through an in situ phosphorus containing titanium based catalyst and articles made from the compositions.

Abstract: The disclosure provides a method for recovering a dihydroxy aromatic compound and a dialkyl carbonate from a polycarbonate-containing composition comprising a polycarbonate and acrylonitrile-butadiene-styrene. The method comprises heating the composition in the presence of an alcohol and a transesterification catalyst at a temperature of 70° C. to 200° C. and a pressure of 50 mbar to 40 bar in a reactor for a time sufficient to depolymerize the polycarbonate producing a dihydroxy aromatic compound and a dialkyl carbonate; removing the dihydroxy aromatic compound and the dialkyl carbonate from the reactor, the acrylonitrile-butadiene-styrene remaining as a coating on the surfaces of the reactor; adding a solvent to the reactor; and heating the solvent to remove the acrylonitrile-butadiene-styrene from the surfaces of the reactor.

Abstract: A method to produce a purified dihydroxy aromatic compound from a polycarbonate-containing composition is provided. The method includes depolymerizing the polycarbonate by alcoholysis using a titanium-based catalyst producing a dihydroxy aromatic compound and a dialkyl carbonate, recovering the dihydroxy aromatic compound as a crude dihydroxy aromatic compound; and contacting the recovered crude dihydroxyl aromatic compound with an acid in the presence of a solvent at an elevated temperature. Alternatively, the method comprises dissolving the recovered crude dihydroxyl aromatic compound in a solvent; contacting the dissolved crude dihydroxy aromatic compound with a base; and neutralizing the combination of the dissolved crude dihydroxy aromatic compound and the base with an acid.

Abstract: A process of preparing a polyalkylene terephthalate comprising reacting an alkylene diol and an aromatic dicarboxy compound that is an aromatic dicarboxylic acid, aromatic dicarboxylic (C1-C3)alkyl ester, or a combination thereof, wherein ester interchange and polymerization occurs in the presence of a catalyst complex formed by the reaction of tetraisopropyl titanate and a boron, phosphorous or nitrogen-containing complexing agent, which catalyst can be synthesized in situ prior to ester interchange and introduced to a mixture of the alkylene diol and the aromatic dicarboxy compound prior to ester interchange.

Abstract: A process of preparing a modified polyalkylene terephthalate by melt polycondensation comprising reacting an alkylene diol and polyethylene terephthalate, wherein polymerization occurs in the presence of a catalyst complex formed by reaction of tetra(alkyl) titanate and a compound selected from phosphorus-containing compounds, nitrogen-containing compounds, boron-containing compounds, and combinations thereof.

Abstract: Biodegradable compositions containing an aliphatic-aromatic copolyester derived from aromatic polyesters. Methods of making the compositions through an in situ phosphorus containing titanium based catalyst and articles made from the compositions.

Abstract: Biodegradable compositions containing an aliphatic-aromatic copolyester derived from aromatic polyesters. Methods of making the compositions through an in situ phosphorus containing titanium based catalyst and articles made from the compositions.