Abstract: The present disclosure relates to a catalyst system to produce crystallizable polyester compositions which comprise residues of terephthalic acid, neopentyl glycol (NRG), 1,4-cyclohexanedimethanol (CHDM), ethylene glycol (EG), and diethylene glycol (DEG), in certain compositional ranges having certain advantages and improved properties including recyclability.

Abstract: The present disclosure relates to a catalyst system to produce crystallizable polyester compositions which comprise residues of terephthalic acid, neopentyl glycol (NRG), 1,4-cyclohexanedimethanol (CHDM), ethylene glycol (EG), and diethylene glycol (DEG), in certain compositional ranges having certain advantages and improved properties including recyclability. The present disclosure also relates to a catalyst system to produce crystallizable polyester compositions which comprise residues of recycled terephthalic acid, recycled neopentyl glycol (NRG), recycled 1,4-cyclohexanedimethanol (CHDM), recycled ethylene glycol (EG), and/or recycled diethylene glycol (DEG), in certain compositional ranges having certain advantages and improved properties including recyclability.

Abstract: A polyester composition containing: a) aluminum atoms; and b) alkaline earth atoms or alkali metal atoms or alkali compound residues such as lithium atoms; and c) particles comprising titanium, zirconium, vanadium, niobium, hafnium, tantalum, chromium, tungsten, molybdenum, iron, or nickel atoms or combinations thereof, where the particles improve the reheat rate of the polyester composition. The polyester polymer compositions may also contain phosphorus catalyst deactivators/stabilizers. The polyester compositions and the articles made from the compositions such as bottle preforms and stretch blow molded bottles have improved reheat rate while maintaining low haze, high L*, a b* below 3, and have low levels of acetaldehyde. In the process for making the polyester polymer, the polymer melt is polycondensed in the presence of a) and b), with the particles c) added in a melt phase process or added to the polymer in an injection molding machine or extruder.

Abstract: A polyester composition containing: a) aluminum atoms; and b) alkaline earth atoms or alkali metal atoms or alkali compound residues such as lithium atoms; and c) particles comprising titanium, zirconium, vanadium, niobium, hafnium, tantalum, chromium, tungsten, molybdenum, iron, or nickel atoms or combinations thereof, where the particles improve the reheat rate of the polyester composition. The polyester polymer compositions may also contain phosphorus catalyst deactivators/stabilizers. The polyester compositions and the articles made from the compositions such as bottle preforms and stretch blow molded bottles have improved reheat rate while maintaining low haze, high L*, a b* below 3, and have low levels of acetaldehyde. In the process for making the polyester polymer, the polymer melt is polycondensed in the presence of a) and b), with the particles c) added in a melt phase process or added to the polymer in an injection molding machine or extruder.

Abstract: A polyester composition containing: a) aluminum atoms; and b) alkaline earth atoms or alkali metal atoms or alkali compound residues such as lithium atoms; and c) particles comprising titanium, zirconium, vanadium, niobium, hafnium, tantalum, chromium, tungsten, molybdenum, iron, or nickel atoms or combinations thereof, where the particles improve the reheat rate of the polyester composition. The polyester polymer compositions may also contain phosphorus catalyst deactivators/stabilizers. The polyester compositions and the articles made from the compositions such as bottle preforms and stretch blow molded bottles have improved reheat rate while maintaining low haze, high L*, a b* below 3, and have low levels of acetaldehyde. In the process for making the polyester polymer, the polymer melt is polycondensed in the presence of a) and b), with the particles c) added in a melt phase process or added to the polymer in an injection molding machine or extruder.

Abstract: A stable catalyst solution suitable for catalyzing the polycondensation of reactants to make polyester polymers comprising: (i) M, wherein M is represented by an alkaline earth metal or alkali metal and (ii) aluminum metal and (iii) a polyhydroxyl ether solvent, wherein the molar ratio of M:Al ranges from 0.2:1 to 4:1 or less. The catalyst solution is desirably a solution which does not precipitate upon standing over a period of at least one week at room temperature (25° C.-40° C.), even at molar ratios of M:Al approaching 1:1. There is also provided a method for the manufacture of the solution, its feed to and use in the manufacture of a polyester polymer, and polyester polymers obtained by combining certain ingredients or containing the residues of these ingredients in the composition.

Abstract: Polyester compositions are disclosed that include polyester polymers or copolymers having incorporated therein metallic nickel particles that improve the reheat properties of the compositions. Processes for making such compositions are also disclosed. The nickel particles may be incorporated in the polyester by melt compounding, or may be added at any stage of the polymerization, such as during the melt-phase of the polymerization. A range of particle sizes may be used, as well as a range of particle size distributions. The polyester compositions are suitable for use in packaging made from processes in which a reheat step is desirable.

Abstract: Articles comprising at least one polyester polymer melt phase product comprising at least one polyethylene terephthalate polyester; at least one metal compound chosen from alkali metal-aluminum compounds; and from 5 ppm to 1000 ppm of at least one phenolic stabilizer. Also provided is a melt phase process for making a polyester polymer melt phase product comprising: forming a slurry comprising at least one glycol chosen from ethylene glycol and derivatives of ethylene glycol and at least one acid chosen from terephthalic acid and derivatives of terephthalic acid; adding 5 ppm to 1000 ppm of at least one phenolic stabilizer; and reacting said at least one glycol and said at least one acid in the presence of at least one catalyst chosen from alkali metal-aluminum catalysts.

Abstract: There is provided a process for increasing the yellowness of polyester polymer particles, preforms, bottles, and concentrates, containing a polyester polymer such as polyethylene terephthalate and copolymers by adding a yellow colorant and reheat agent particles comprising titanium, alloys of titanium, titanium nitride, titanium boride, titanium carbide, or combinations thereof to a melt phase polymerization process for making the polyester polymer to adding any one of the colorant or particles to a polyester polymer.

Abstract: A stable catalyst solution suitable for catalyzing the polycondensation of reactants to make polyester polymers comprising: (i) M, wherein M is represented by an alkaline earth metal or alkali metal and (ii) aluminum metal and (iii) a polyhydroxyl ether solvent, wherein the molar ratio of M:Al ranges from 0.2:1 to 4:1 or less. The catalyst solution is desirably a solution which does not precipitate upon standing over a period of at least one week at room temperature (25° C.-40° C.), even at molar ratios of M:Al approaching 1:1. There is also provided a method for the manufacture of the solution, its feed to and use in the manufacture of a polyester polymer, and polyester polymers obtained by combining certain ingredients or containing the residues of these ingredients in the composition.

Abstract: A polyester composition, a preform, and a bottle, containing a polyester such as polyethylene terephthalate or polyethylene naphthalate and activated carbon to enhance the rate for reheating the composition is provided. Activated carbon may be added in the presence of active phosphorus containing compounds, or at any stage in the melt phase after prepolymerization and after the polyester polymer is solidified. Polyester concentrates containing activated carbon may be added to bulk polyesters to make preforms suitable for blowing into bottles.

Abstract: A polyester composition, a preform, and a bottle, containing a polyester such as polyethylene terephthalate or polyethylene naphthalate and activated carbon to enhance the rate for reheating the composition is provided. Activated carbon may be added in the presence of active phosphorus containing compounds, or at any stage in the melt phase after prepolymerization and after the polyester polymer is solidified. Polyester concentrates containing activated carbon may be added to bulk polyesters to make preforms suitable for blowing into bottles.

Abstract: A polyester pellet composition, a preform, and a bottle, each comprising a polyester polymer and silicon carbide. A polyester, and in particular a polyethylene terephthalate polyester, bottle containing silicon carbide has a low coefficient of static friction and a low bottle sidewall haze.

Abstract: A polyester pellet composition, a preform, and a bottle, each comprising a polyester polymer and silicon carbide. A polyester, and in particular a polyethylene terephthalate polyester, bottle containing silicon carbide has a low coefficient of static friction and a low bottle sidewall haze.

Abstract: A thermoplastic composition such as a polyester composition including polyethylene terephthalate polymers containing glassy carbon, and the preforms, bottles, sheets, rods, tubes, films and other articles made from these compositions.

Abstract: In a process for producing a reactor grade polyester, a poly(1,4-cyclohexylenedimethylene 1,4-cyclohexanedicarboxylate) has a reduced amount of isomerization of the trans-isomer to the cis-isomer of 1,4-dimethylcyclohexanedicarboxylate and an increased polymerization rate by the addition of a phosphorus-containing compound to the reaction process. In step (a) of the process, a diacid comprising at least 80 mole percent 1,4-cyclohexanedicarboxylic acid or an ester derivative of the diacid comprising at least 80 mole percent 1,4-dimethylcyclohexanedicarboxylate is reacted with a glycol comprising at least 80 mole percent 1,4-cyclohexanedimethanol at a temperature sufficient to effect esterification for the diacid or transesterification for the ester derivative. In step (b), the product of step (a) is subjected to temperatures and pressures in the presence of a suitable catalyst to effect polycondensation.

Abstract: In a process for producing a reactor grade polyester, a poly(1,4-cyclohexylenedimethylene 1,4-cyclohexanedicarboxylate) has a reduced amount of isomerization of the trans-isomer to the cis-isomer of 1,4-dimethylcyclohexanedicarboxylate and an increased polymerization rate by the addition of a phosphorus-containing compound to the reaction process. In step (a) of the process, a diacid comprising at least 80 mole percent 1,4-cyclohexanedicarboxylic acid or an ester derivative of the diacid comprising at least 80 mole percent 1,4-dimethylcyclohexanedicarboxylate is reacted with a glycol comprising at least 80 mole percent 1,4-cyclohexanedimethanol at a temperature sufficient to effect esterification for the diacid or transesterification for the ester derivative. In step (b), the product of step (a) is subjected to temperatures and pressures in the presence of a suitable catalyst to effect polycondensation.

Abstract: In a process for producing a polyester containing 1,4-cyclohexanedimethanol (CHDM) as one of its glycol components, an aqueous or a methanolic slurry comprising CHDM and a dicarboxylic acid is prepared. The slurry is maintained at a temperature below the melting point of CHDM. The slurry is then fed into a reactor. The slurry is esterified at sufficient temperatures and pressures, and optionally in the presence of a suitable catalyst, to effect esterification. A prepolymer is formed. The prepolymer is then polycondensed at sufficient temperatures and pressures in the presence of a suitable catalyst to effect polycondensation to form a polyester.

Abstract: The present invention relates to a process for producing a high molecular weight polyester having less than about 0.5 weight % diethylene glycol comprising adding at least one carbonate compound to the ester exchange reaction product produced from reaction of a glycol component comprising ethylene glycol and an ester component comprising dimethylterephthalate, dimethylnaphthalenedicarboxylate and mixtures thereof wherein said reaction product is formed without a Ti catalyst.